JP6551569B1 - Scroll fluid machine and method of manufacturing scroll fluid machine - Google Patents

Abstract

To improve the efficiency of a scroll fluid machine. In a scroll compressor (10) that is a scroll fluid machine, in a pre-processing step, a turning scroll processing step and a housing processing step are performed. In the measurement process, the dimensional deviation of the orbiting scroll (50) and the housing (60) processed in the pre-processing process is measured. In the target setting step, the target value of the dimensional deviation of the fixed scroll (40) is set so as to cancel out the dimensional deviation of the orbiting scroll (50) and the housing (60). In the fixed scroll processing step, which is a post-processing step, the fixed scroll (40) is processed so that the dimensional deviation of the fixed scroll (40) becomes a target value. [Selection] Figure 9

Description

  The present disclosure relates to scroll fluid machines and methods of making the same.

  Patent Document 1 discloses a scroll fluid machine (scroll compressor). The scroll fluid machine includes a fixed scroll, a orbiting scroll, and a housing. In this scroll compressor, the fixed side wrap formed on the fixed scroll and the orbiting side wrap formed on the orbiting scroll are engaged with each other to form a fluid chamber (compression chamber). The fixed scroll is fixed to the housing.

JP 2006-079873 A

  In a scroll fluid machine, a fixed scroll, a turning scroll, and a housing are combined. The fixed scroll, the orbiting scroll, and the housing have dimensional errors (that is, the difference between actual dimensions and design values). Therefore, a gap is formed between the fixed wrap of the fixed scroll and the orbiting wrap of the orbiting scroll, and the fluid leaks from the fluid chamber through the gap.

  Conventionally, in order to reduce the amount of fluid leaking from the fluid chamber and improve the efficiency of the scroll fluid machine, efforts have been made to increase the processing accuracy of the fixed scroll, the orbiting scroll, and the housing. However, there is a limit to improving the machining accuracy of mass production of scroll fluid machines due to the time required for machining and the performance of machine tools, and the efficiency of the scroll fluid machine can only be increased to a certain extent. could not.

  An object of the present disclosure is to improve the efficiency of a scroll fluid machine.

  According to a first aspect of the present disclosure, a rotating scroll (50) having a rotating side wrap (52) and a boss (53) formed thereon, and a rotation coupled to the boss (53) of the rotating scroll (50) A housing (60) in which a bearing (64) for supporting the shaft (25) is formed, and a fixed side wrap (42) engaged with the turning side wrap (52) are formed and fixed to the housing (60) A scroll fluid machine comprising a fixed scroll (40), wherein the fixed scroll (40) and the housing (60) respectively define a fixed position of the fixed scroll (40) with respect to the housing (60) And a plurality of positioning structures (44, 67) are formed for each, while the deviation of the central axis of the boss (53) with respect to the central axis of the orbiting wrap (52) is taken as the dimensional deviation of the orbiting scroll (50). , Each of the above housings (60) The straight line located at the shortest equidistant distance from the positioning structure (67) is taken as the housing center axis, and the deviation of the housing center axis relative to the center axis of the bearing portion (64) is taken as the dimensional deviation of the housing (60), The straight line located equidistantly from the positioning structures (44) of the fixed scroll (40) is taken as the fixed side central axis, and the deviation of the central axis of the fixed side wrap (42) with respect to the fixed side central axis is said The dimensional deviation of the fixed scroll (40), the sum of the dimensional deviation of the orbiting scroll (50), the dimensional deviation of the housing (60) and the dimensional deviation of the fixed scroll (40) is the total deviation. When one of the fixed scroll (40) and the housing (60) is used as a first part and at least one of the remaining two parts is used as a second part, the dimensional deviation of the first part Of the second part, and the variance of the total deviation is smaller than the variance of the dimensional deviation of the first part.

  In the first aspect, the dispersion of the dimensional deviation of the first part encompasses the dispersion of the dimensional deviation of the second part. For this reason, part or all of the dimensional deviation of the second part can be offset by the dimensional deviation of the first part. Then, if part or all of the dimensional deviation of the second part is offset by the dimensional deviation of the first part, the variance of the total deviation becomes smaller than the variance of the dimensional deviation of the first part.

  Conventionally, the variance of the total deviation could not be made smaller than the variance of the dimensional deviation of the first part, but according to the first aspect, the variance of the total deviation is greater than the variance of the dimensional deviation of the first part It can be made smaller. Therefore, according to this aspect, it is possible to reduce the variance of the total deviation without increasing the processing accuracy of the orbiting scroll (50), the housing (60) and the fixed scroll (40) as compared with the prior art. It becomes possible to improve the efficiency of 10).

  According to a second aspect of the present disclosure, in the first aspect, one of the fixed scroll (40) and the housing (60) is the first part, and the orbiting scroll (50) is the second part. It is characterized by being.

  In the second embodiment, when the fixed scroll (40) is the first part and the orbiting scroll (50) is the second part, "dispersion of dimensional deviation of the fixed scroll (40)" Inclusive), and “the variance of the total deviation” is smaller than the “variance of the size deviation of the fixed scroll (40)”. Further, in this embodiment, when the housing (60) is the first part and the orbiting scroll (50) is the second part, the “dispersion of dimensional deviation of the housing (60)” is “the orbiting scroll (50). It includes the variance of the dimensional deviation, and the variance of the total deviation is smaller than the variance of the dimensional deviation of the housing (60).

  According to a third aspect of the present disclosure, in the first aspect, the fixed scroll (40) is the first component, and the orbiting scroll (50) and the housing (60) are the second component. It is characterized by.

  In the third aspect, “dispersion of dimensional deviation of fixed scroll (40)” includes “dispersion of dimensional deviation of orbiting scroll (50)” and “dispersion of dimensional deviation of housing (60)”, and “ The variance of the total deviation is smaller than the variance of the dimensional deviation of the fixed scroll (40).

  According to a fourth aspect of the present disclosure, in the first aspect, the housing (60) is the first part, and the orbiting scroll (50) and the fixed scroll (40) are the second part. It is characterized by.

  In the fourth aspect, “dispersion of dimensional deviation of housing (60)” includes “dispersion of dimensional deviation of orbiting scroll (50)” and “dispersion of dimensional deviation of fixed scroll (40)”, and “ The variance of the total deviation is smaller than the variance of the dimensional deviation of the housing (60).

  According to a fifth aspect of the present disclosure, the orbiting scroll (50) formed with the orbiting side wrap (52) and the boss portion (53) and the rotation connected to the boss portion (53) of the orbiting scroll (50). A housing (60) in which a bearing portion (64) for supporting the shaft (25) is formed, and a fixed side wrap (42) that meshes with the turning side wrap (52) are formed and fixed to the housing (60). A scroll fluid machine comprising a fixed scroll (40), wherein a fixed position of the fixed scroll (40) relative to the housing (60) is defined in each of the fixed scroll (40) and the housing (60). And a plurality of positioning structures (44, 67) are formed for each, while the deviation of the central axis of the boss (53) with respect to the central axis of the orbiting wrap (52) is taken as the dimensional deviation of the orbiting scroll (50). , Each of the housing (60) The straight line located at the shortest equidistant distance from the positioning structure (67) is taken as the housing center axis, and the deviation of the housing center axis relative to the center axis of the bearing portion (64) is taken as the dimensional deviation of the housing (60), A straight line located at the shortest equidistant distance from each positioning structure (44) of the fixed scroll (40) is a fixed central axis, and the deviation of the central axis of the fixed wrap (42) from the fixed central axis is defined as When the total deviation is defined as the dimensional deviation of the fixed scroll (40), and the sum of the dimensional deviation of the orbiting scroll (50), the dimensional deviation of the housing (60), and the dimensional deviation of the fixed scroll (40), The dispersion of the dimensional deviation of the fixed scroll (40) is formed on the fixed scroll (40) such that the dispersion of the deviation is smaller than the dispersion of the dimensional deviation of the fixed scroll (40). It is characterized in that it is larger than the dispersion of the spacing between the plurality of positioning structures (44).

  In the fifth aspect, the “dispersion of dimensional deviation of the fixed scroll (40)” is larger than the “dispersion of intervals between the plurality of positioning structures (44) formed on the fixed scroll (40)”. By offsetting some or all of the dimensional deviation of the scroll (50) and the dimensional deviation of the housing (60) by the dimensional deviation of the fixed scroll (40), the "dispersion of the total deviation" becomes "dimension of the fixed scroll (40) It becomes possible to make it smaller than the “dispersion of deviation”. Therefore, according to this aspect, it is possible to reduce the variance of the total deviation without increasing the processing accuracy of the orbiting scroll (50), the housing (60) and the fixed scroll (40) as compared with the prior art. It becomes possible to improve the efficiency of 10).

  In a sixth aspect of the present disclosure, the orbiting scroll (50) in which the orbiting wrap (52) and the boss portion (53) are formed, and the rotation connected to the boss portion (53) of the orbiting scroll (50). A housing (60) in which a bearing (64) for supporting the shaft (25) is formed, and a fixed side wrap (42) engaged with the turning side wrap (52) are formed and fixed to the housing (60) A scroll fluid machine comprising a fixed scroll (40), wherein a fixed position of the fixed scroll (40) relative to the housing (60) is defined in each of the fixed scroll (40) and the housing (60). And a plurality of positioning structures (44, 67) are formed for each, while the deviation of the central axis of the boss (53) with respect to the central axis of the orbiting wrap (52) is taken as the dimensional deviation of the orbiting scroll (50). , Each of the housing (60) The straight line located at the shortest equidistant distance from the positioning structure (67) is taken as the housing center axis, and the deviation of the housing center axis relative to the center axis of the bearing portion (64) is taken as the dimensional deviation of the housing (60), The straight line located equidistantly from the positioning structures (44) of the fixed scroll (40) is taken as the fixed side central axis, and the deviation of the central axis of the fixed side wrap (42) with respect to the fixed side central axis is said When the total deviation is defined as the dimensional deviation of the fixed scroll (40), and the sum of the dimensional deviation of the orbiting scroll (50), the dimensional deviation of the housing (60), and the dimensional deviation of the fixed scroll (40), The distribution of the dimensional deviations of the housing (60) is such that the distribution of the dimensional deviations of the housing (60) is smaller than the dispersion of the dimensional deviations of the housing (60). It is characterized in that it is larger than the dispersion of the intervals between the determined structures (67).

  In the sixth aspect, the “dispersion of dimensional deviation of the housing (60)” is larger than the “dispersion of intervals between the plurality of positioning structures (67) formed on the housing (60)”. "Distribution of total deviation" becomes "Dispersion of dimensional deviation of housing (60)" by offsetting part or all of dimensional deviation of 50) and fixed scroll (40) with dimensional deviation of housing (60). It is possible to make it smaller. Therefore, according to this aspect, it is possible to reduce the variance of the total deviation without increasing the processing accuracy of the orbiting scroll (50), the housing (60) and the fixed scroll (40) as compared with the prior art. It becomes possible to improve the efficiency of 10).

  In a seventh aspect of the present disclosure, the orbiting scroll (50) in which the orbiting wrap (52) and the boss portion (53) are formed, and the rotation connected to the boss portion (53) of the orbiting scroll (50). A housing (60) in which a bearing portion (64) for supporting the shaft (25) is formed, and a fixed side wrap (42) that meshes with the turning side wrap (52) are formed and fixed to the housing (60). A fixed scroll (40), and a positioning structure (44,67) for determining a fixed position of the fixed scroll (40) relative to the housing (60) in each of the fixed scroll (40) and the housing (60) ) Is a method of manufacturing a scroll fluid machine in which a plurality of each are formed, and the orbiting scroll machining step of machining the orbiting side wrap (52) and the boss portion (53) of the orbiting scroll (50) that is a workpiece. And with the parts to be processed A fixed scroll processing step for processing the fixed side wrap (42) and the positioning structure (44) of the fixed scroll (40), the bearing portion (64) of the housing (60) which is a workpiece, and the above And a housing processing step of processing a positioning structure (67), wherein a deviation of a central axis of the boss (53) with respect to a central axis of the orbiting wrap (52) is a dimensional deviation of the orbiting scroll (50); The straight line positioned at the shortest equidistant distance from each of the positioning structures (67) of the housing (60) is taken as the housing center axis, and the deviation of the housing center axis relative to the center axis of the bearing portion (64) 60), and a straight line located equidistantly from each of the positioning structures (44) of the fixed scroll (40) is taken as the fixed side central axis, and the straight line relative to the fixed side central axis The deviation of the central axis of the fixed side wrap (42) is the dimensional deviation of the fixed scroll (40), and one of the orbiting scroll processing step, the fixed scroll processing step, and the housing processing step is a post-processing step, When at least one of the remaining two is a pre-processing step performed prior to the post-processing step, the dimensional deviation of the processed component processed in the pre-processing step is determined after the end of the pre-processing step. Processed in the post-processing process so that the measurement process to be measured and the dimensional deviation of the processed component measured in the measurement process are offset by the dimensional deviation of the processed component processed in the post-processing process And a target setting step of setting a target value of the dimensional deviation of the workpiece to be processed. In the post-processing step, the dimensional deviation of the workpiece to be processed As the set target value, and performs processing of the processed part.

  In the seventh aspect, the pre-processing step, the measurement step, the target setting step, and the post-processing step are performed in order. In the post-processing step, processing of the workpiece is performed such that “the dimensional deviation of the workpiece” becomes “the target value set in the target setting process”. As a result, the dimensional deviation of the processed part processed in the post-processing step offsets part or all of the dimensional deviation of the processed part processed in the pre-processing step. Therefore, according to this aspect, it is possible to reduce the variance of the total deviation without increasing the processing accuracy of the orbiting scroll (50), the housing (60) and the fixed scroll (40) as compared with the prior art. It becomes possible to improve the efficiency of 10).

  In an eighth aspect of the present disclosure, in the seventh aspect, the orbiting scroll processing step is the pre-processing step, the fixed scroll processing step is the post-processing step, and in the measurement step, the orbiting scroll The dimensional deviation of the orbiting scroll (50) processed in the processing step is measured, and in the target setting step, the dimensional deviation of the orbiting scroll (50) measured in the measuring step is the same as that of the fixed scroll (40). The target value of the dimensional deviation of the fixed scroll (40) is set so as to be offset by the dimensional deviation, and in the fixed scroll processing step, the dimensional deviation of the fixed scroll (40) is set in the target setting step. The fixed side wrap (42) and the positioning structure (44) of the fixed scroll (40) are processed so as to achieve target values. .

  In the eighth aspect, the dimensional deviation of the fixed scroll (40) processed in the fixed scroll processing step (post-processing step) is the dimensional deviation of the orbiting scroll (50) processed in the orbiting scroll processing step (pre-processing step). The dimension deviation is such that Therefore, in the scroll fluid machine (10) manufactured by the manufacturing method of this aspect, part or all of the dimensional deviation of the orbiting scroll (50) is offset by the dimensional deviation of the fixed scroll (40).

  According to a ninth aspect of the present disclosure, in the seventh aspect, the orbiting scroll processing step is the pre-processing step, the housing processing step is the post-processing step, and the measuring step includes the orbiting scroll processing. The dimension deviation of the orbiting scroll (50) processed in the process is measured, and in the target setting step, the dimension deviation of the orbiting scroll (50) measured in the measurement process is the dimension deviation of the housing (60). The target value of the dimensional deviation of the housing (60) is set so as to be offset by the above, and in the housing processing step, the dimensional deviation of the housing (60) becomes the target value set in the target setting step. And the above-mentioned bearing portion (64) of the above-mentioned housing (60) and the above-mentioned positioning structure (67).

  In the ninth aspect, the dimensional deviation of the housing (60) processed in the housing processing step (post-processing step) cancels out the dimensional deviation of the orbiting scroll (50) processed in the orbiting scroll processing step (pre-processing step). The dimensional deviation is as follows. Therefore, in the scroll fluid machine (10) manufactured by the manufacturing method of this aspect, part or all of the dimensional deviation of the orbiting scroll (50) is offset by the dimensional deviation of the housing (60).

  According to a tenth aspect of the present disclosure, in the seventh aspect, the orbiting scroll processing step and the housing processing step are the preprocessing step, the fixed scroll processing step is the postprocessing step, and the measurement In the step, the dimensional deviation of the orbiting scroll (50) processed in the orbiting scroll processing step and the dimensional deviation of the housing (60) processed in the housing processing step are measured, and in the target setting step, The fixed scroll (40) such that the dimensional deviation of the orbiting scroll (50) and the dimensional deviation of the housing (60) measured in the measurement step are offset by the dimensional deviation of the fixed scroll (40). In the fixed scroll machining process, the dimensional deviation of the fixed scroll (40) As the set target value in the step, characterized by machining the fixed scroll wrap (42) and the positioning structure (44) of the fixed scroll (40).

  In the tenth aspect, the dimensional deviation of the fixed scroll (40) processed in the fixed scroll processing step (post-processing step) is the dimensional deviation of the orbiting scroll (50) processed in the orbiting scroll processing step (pre-processing step). And a dimensional deviation of the housing (60) processed in the housing processing step (pre-processing step). Therefore, in the scroll fluid machine (10) manufactured by the manufacturing method of this aspect, part or all of the dimensional deviation of the orbiting scroll (50) and the dimensional deviation of the housing (60) are the dimensional deviations of the fixed scroll (40) Is offset by

  According to an eleventh aspect of the present disclosure, in the seventh aspect, the orbiting scroll processing step and the fixed scroll processing step are the preprocessing step, the housing processing step is the postprocessing step, and the measurement In the step, the dimensional deviation of the orbiting scroll (50) processed in the orbiting scroll processing step and the dimensional deviation of the fixed scroll (40) processed in the fixed scroll processing step are measured, and the target setting step Then, the housing (60) is arranged such that the dimensional deviation of the orbiting scroll (50) measured in the measuring step and the dimensional deviation of the fixed scroll (40) are offset by the dimensional deviation of the housing (60). ) Dimensional deviation target value is set, and in the housing processing step, the dimensional deviation of the housing (60) is the target setting process. As the set target value in, characterized by machining the bearing portion (64) and said positioning structure (67) of the housing (60).

  In the eleventh aspect, the dimensional deviation of the housing (60) processed in the housing processing step (post-processing step) is the dimensional deviation of the orbiting scroll (50) processed in the orbiting scroll processing step (pre-processing step); This results in a dimensional deviation that offsets the dimensional deviation of the fixed scroll (40) processed in the fixed scroll processing step (pre-processing step). Therefore, in the scroll fluid machine (10) manufactured by the manufacturing method of this aspect, part or all of the dimensional deviation of the orbiting scroll (50) and the dimensional deviation of the fixed scroll (40) is the dimensional deviation of the housing (60). Is offset by

FIG. 1 is a longitudinal sectional view of a scroll compressor according to a first embodiment. FIG. 2 is a plan view of the orbiting scroll of the scroll compressor of the first embodiment. FIG. 3 is a cross-sectional view of the orbiting scroll showing the III-III cross section of FIG. FIG. 4 is a bottom view of the fixed scroll of the scroll compressor according to the first embodiment. FIG. 5 is a cross-sectional view of the fixed scroll showing a VV cross section of FIG. FIG. 6 is a plan view of the housing of the scroll compressor according to the first embodiment. 7 is a cross-sectional view of the fixed scroll showing a VII-VII cross section of FIG. FIG. 8 is an exploded cross-sectional view of a compression mechanism of the scroll compressor according to the first embodiment. FIG. 9 is a block diagram showing the main part of the method of manufacturing the scroll compressor of the first embodiment. FIG. 10 is a diagram showing the dimensional deviation of the scroll compressor according to the first embodiment in two-dimensional coordinates. FIG. 11 is a diagram showing the distribution of the dimensional deviation of the orbiting scroll of the scroll compressor according to the first embodiment in two-dimensional coordinates. FIG. 12 is a diagram showing the distribution of the dimensional deviation of the housing of the scroll compressor according to the first embodiment in two-dimensional coordinates. FIG. 13 is a diagram showing the distribution of the dimensional deviation of the fixed scroll of the scroll compressor according to the first embodiment in two-dimensional coordinates. FIG. 14 is a diagram showing the distribution of the total deviation of the scroll compressor according to the first embodiment in two-dimensional coordinates. FIG. 15 is a diagram showing the dimensional deviation of the orbiting scroll of the scroll compressor according to the second embodiment in two-dimensional coordinates. FIG. 16 is a diagram showing the dimensional deviation of the orbiting scroll of the scroll compressor according to the third embodiment in two-dimensional coordinates. FIG. 17 is a diagram showing the dimensional deviation of the orbiting scroll of the scroll compressor according to the fourth embodiment in two-dimensional coordinates. FIG. 18 is a diagram showing the distribution of the dimensional deviation of the fixed scroll processed with the target value of the dimensional deviation as zero in two-dimensional coordinates. FIG. 19 is a diagram showing the dimensional deviation of the orbiting scroll of the conventional scroll compressor in two-dimensional coordinates. FIG. 20 is a diagram showing the distribution of the total deviation of the conventional scroll compressor in two-dimensional coordinates.

Embodiment 1
The scroll compressor (10) of the first embodiment will be described. The scroll compressor (10) is a scroll fluid machine and is connected to a refrigerant circuit (not shown) that circulates refrigerant to perform a refrigeration cycle, and compresses the refrigerant that is a fluid.

-Overall configuration of scroll compressor-
As shown in FIG. 1, the scroll compressor (10) is a fully enclosed compressor in which a compression mechanism (30) and an electric motor (20) are accommodated in a casing (11) which is a closed container.

  The casing (11) is a cylindrical pressure vessel closed at both ends. The casing (11) is installed in a posture in which the axial direction is the vertical direction. At the upper end of the casing (11), a suction pipe (12) for introducing the refrigerant of the refrigerant circuit to the compression mechanism (30) is provided. Further, the casing (11) is provided with a discharge pipe (13) for leading the refrigerant in the casing (11) to the outside of the casing (11).

  Inside the casing (11), the motor (20) is disposed below the compression mechanism (30). The motor (20) and the compression mechanism (30) are connected by a drive shaft (25). The motor (20) comprises a stator (21) and a rotor (22). The stator (21) of the motor (20) is fixed to the casing (11). The rotor (22) of the motor (20) is attached to the drive shaft (25).

  The drive shaft (25) includes a main shaft portion (26) and an eccentric shaft portion (27). The axis of the main shaft (26) coincides with the axis of the drive shaft (25). The rotor (22) of the electric motor (20) is attached to the main shaft portion (26). In the main shaft portion (26), the upper portion of the rotor (22) is supported by a bearing portion (64) of a housing (60) described later. The eccentric shaft portion (27) is formed in a relatively short shaft shape, and protrudes from the upper end of the main shaft portion (26). The axial center of the eccentric shaft (27) is substantially parallel to the axial center of the main shaft (26) and is eccentric to the axial center of the main shaft (26).

-Configuration of compression mechanism-
The compression mechanism (30) includes an orbiting scroll (50), a fixed scroll (40), a housing (60), and an Oldham coupling (32). In the compression mechanism (30), the orbiting scroll (50) and the fixed scroll (40) form a compression chamber (31) which is a fluid chamber.

  The housing (60) is fixed to the casing (11). The fixed scroll (40) is disposed on the top surface of the housing (60). The orbiting scroll (50) is disposed between the fixed scroll (40) and the housing (60).

  The Oldham fitting (32) is disposed between the orbiting scroll (50) and the housing (60). The Oldham joint (32) engages with a key groove (54) of the orbiting scroll (50) described later and a key groove (63) of the housing (60) described later, and regulates rotation of the orbiting scroll (50) .

<Swivel scroll>
As shown in FIGS. 2 and 3, the orbiting scroll (50) includes an orbiting side plate portion (51), an orbiting side wrap (52), and a boss (53).

  The swing side end plate portion (51) is formed in a substantially circular flat plate shape. The turning side wrap (52) is formed in a spiral wall shape that describes an involute curve, and protrudes from the front surface (upper surface in FIG. 3) of the turning side mirror plate portion (51). The boss portion (53) is formed in a cylindrical shape protruding from the back surface (the lower surface in FIG. 3) of the turning side end plate portion (51), and is arranged at the center of the turning side end plate portion (51). The boss part (53) constitutes a journal bearing. The eccentric shaft (27) of the drive shaft (25) is inserted into the boss (53) (see FIG. 1).

  A keyway (54) is formed in the turning-side end plate portion (51) of the turning scroll (50). The key groove (54) is a concave groove opened on the back surface of the pivoting side plate. The key grooves (54) are arranged one by one at positions facing each other across the boss portion (53). The key of the Oldham coupling (32) is fitted into the key groove (54).

Straight _{CL OB} is the central axis _{CL OB} of the boss portion (53), the point _{CP OB} is a point on the center axis _{CL OB} of the boss (53). The point CP _OW is the center of the turning side wrap (52), and the straight line CL _OW is the central axis CL _OW of the turning side wrap (52). The center of the turning wrap (52) is the center of the base circle of the involute curve that defines the shape of the turning wrap (52). The point CP _OB and the point CP _OW are points on one plane orthogonal to the central axis CL _OB of the boss (53). The central axis CL _OW of the turning side wrap (52) is a straight line that passes through the point CP _OW and is parallel to the central axis CL _OB of the boss portion (53).

Dimensional deviations _{D O} of the orbiting scroll (50) is a deviation of the center axis _{CL OB} of the boss portion with respect to the center axis _{CL OW} of the orbiting side wrap (52) (53). The dimensional deviations _{D O} is the vector of the end point the point _{CP OB} as starting point _{CP OW.} In FIG. 2 and FIG. 3, the dimensional deviation D _O of the orbiting scroll (50) is exaggerated. The size of the dimensional deviations D _O of the orbiting scroll (50) is several tens of μm order at most.

Fixed scroll
As shown in FIGS. 4 and 5, the fixed scroll (40) includes a fixed side end plate portion (41), a fixed side wrap (42), and an outer peripheral wall portion (43).

  The fixed-side end plate portion (41) is a relatively thick flat plate-like portion located above the fixed scroll (40). The stationary side wrap (42) is formed in a spiral wall shape that describes an involute curve, and protrudes from the front surface (the lower surface in FIG. 5) of the stationary side mirror plate portion (41). The outer peripheral wall portion (43) is formed to surround the outer peripheral side of the fixed side wrap (42), and protrudes from the front surface of the fixed side end plate portion (41). The projecting end surface (lower end surface in FIG. 5) of the outer peripheral wall portion (43) is a substantially flat surface. Further, the projecting end surface of the outer peripheral wall portion (43) is substantially flush with the projecting end surface (lower end surface in FIG. 5) of the fixed side wrap (42).

  The fixed scroll (40) is formed with two positioning holes (44). Each positioning hole (44) is a positioning structure for determining a fixed position of the fixed scroll (40) with respect to the housing (60).

  Each positioning hole (44) is a hole of a circular cross section which opens at the end face of the outer peripheral wall (43). In each positioning hole (44), the central axes thereof are substantially parallel to one another, and the central axes thereof are substantially orthogonal to the end face of the outer peripheral wall (43). Each positioning hole (44) is arranged near the outer peripheral edge of the outer peripheral wall (43). Moreover, two positioning holes (44) are arrange | positioned on the opposite side which pinched | interposed the fixed side wrap (42) with respect to the other. Each positioning hole (44) and the "fitting" of the positioning pin (35) described later are selected so that the fixed position of the fixed scroll (40) with respect to the housing (60) can be determined with desired accuracy.

The straight line CL _FP is the fixed side central axis CL _FP , and the point CP _FP is a point on the fixed side central axis CL _FP . Stationary central shaft CL _FP is located on one plane including the central axis CA _FP of two positioning holes (44), the distance is equal to the straight line from the central axis CA _FP of each of the positioning holes (44). The fixed side central axis CL _FP is located equidistantly and at the shortest distance from the central axis CA _{FP of} each positioning hole (44).

The point CP _FW is the center of the fixed wrap (42), and the straight line CL _FW is the central axis CL _FW of the fixed wrap (42). The center of the stationary wrap (42) is the center of the base circle of the involute curve that defines the shape of the stationary wrap (42). The point CP _FP and the point CP _FW are points on one plane orthogonal to the fixed-side central axis CL _FP . The central axis CL _FW of the stationary side wrap (42) is a straight line passing through the point CP _FW and parallel to the stationary side central axis CL _FP .

The dimensional deviation _DF of the fixed scroll (40) is a deviation of the central axis CL _FW of the fixed side wrap (42) with respect to the fixed side central axis CL _FP . This dimensional deviation D _F is a vector having a point CP _FP as a start point and a point CP _FW as an end point. In FIG. 4 and FIG. 5, the dimensional deviation _DF of the fixed scroll (40) is exaggerated. The size deviation _DF of the fixed scroll (40) is about several tens of μm at the maximum.

<housing>
As shown in FIGS. 6 and 7, the housing (60) includes a main body portion (61), a bearing portion (64), and a holding projection (66).

  The main body portion (61) is formed in a thick disk shape. A crank chamber (62) is formed at the central portion of the main body (61). The crank chamber (62) is a cylindrical recess that opens to the front surface (upper surface in FIG. 7) of the main body (61). In addition, a key groove (63) is formed in the main body (61). The key groove (63) is a concave groove opened on the front surface of the main body (61). The key grooves (63) are disposed one by one at opposing positions across the crank chamber (62). The key of the Oldham coupling (32) is fitted into the key groove (63).

  The bearing portion (64) is formed in a cylindrical shape that protrudes from the rear surface (the lower surface in FIG. 7) of the main body portion (61), and is disposed at the central portion of the main body portion (61). The bearing portion (64) constitutes a journal bearing. A bearing metal (65) is disposed inside the bearing (64) (see FIG. 1). The main shaft portion (26) of the drive shaft (25) is inserted into the bearing portion (64).

  The housing (60) is formed with four holding projections (66). Each holding projection (66) protrudes from the front surface of the main body (61). Further, each holding projection (66) is formed in a curved shape extending along the outer peripheral edge of the main body (61). The projecting end surface (upper surface in FIG. 7) of each holding projection (66) is a substantially flat surface. Further, the projecting end surfaces of the holding projections (66) are substantially flush with each other.

  Two positioning holes (67) are formed in the housing (60). Each positioning hole (67) is a positioning structure for determining a fixed position of the fixed scroll (40) with respect to the housing (60).

  Each positioning hole (67) is a hole of a circular cross section which opens at the end face of the holding projection (66). In each positioning hole (67), the central axes thereof are substantially parallel to each other, and the central axes thereof are substantially orthogonal to the end face of the holding projection (66). One of the two positioning holes (67) is arranged on the opposite side of the crank chamber (62) with respect to the other. Each positioning hole (67) and the "fitting" of the positioning pin (35) described later are selected so as to determine the fixed position of the fixed scroll (40) relative to the housing (60) with desired accuracy.

The straight line CL _HB is the central axis CL _HB of the bearing portion (64), and the point CP _HB is a point on the central axis CL _HB of the bearing portion (64). Further, the straight line CL _HP is a housing side central axis CL _HP , and the point CP _HP is a point on the housing side central axis CL _HP . Housing-side center axis CL _HP is located on one plane including the central axis CA _HP two positioning holes (67), the distance is equal to the straight line from the central axis CA _HP of each of the positioning holes (67). Housing-side center axis _{CL HP} is equidistant and the shortest distance from the central axis _{CA HP} of each of the positioning holes (67).

Dimensional deviations _{D H} of the housing (60), which is a deviation of the housing-side center axis _{CL HP} with respect to the central axis _{CL HB} of the bearing portion (64). The dimensional deviation _DH is a vector having a point CP _HB as a start point and a point CP _HP as an end point. 6 and 7, the dimensional deviation _DH of the housing (60) is exaggerated. The magnitude of the dimensional deviation D _H of the housing (60) is about several tens of μm at the maximum.

<Arrangement of fixed scroll and orbiting scroll and housing>
As shown in FIG. 8, the fixed scroll (40) is disposed above the housing (60), and the orbiting scroll (50) is disposed between the fixed scroll (40) and the housing (60). Although not shown in FIG. 8, an Oldham coupling (32) is disposed between the orbiting scroll (50) and the housing (60).

The fixed scroll (40) and the housing (60) are combined in such a posture that the positioning pins (35) are fitted in the positioning holes (44, 67). That is, one positioning pin (35) is inserted into the positioning hole (44) of the fixed scroll (40) and the positioning hole (67) of the housing (60) facing each other. Therefore, when the fixed scroll (40) and the housing (60) are combined, the central axis CA _FP of each positioning hole (44) of the fixed scroll (40) and each positioning hole (67) of the housing (60) The central axes CA _HP substantially coincide with each other.

The fixed scroll (40) is fixed to the housing (60) by a plurality of bolts (not shown). When the bolt is tightened, the end face of the outer peripheral wall (43) of the fixed scroll (40) comes in close contact with the end face of the holding projection (66) of the housing (60). Then, the fixed scroll (40), relative to the housing (60), the fixed side center axis CL _FP is fixed in a posture substantially coincident with the housing-side center axis CL _HP.

-Manufacturing method of scroll compressor-
A method of manufacturing the scroll compressor (10) will be described. In the method of manufacturing the scroll compressor (10), the steps of processing the components of the compression mechanism (30), the steps of assembling the components of the compression mechanism (30) and connecting them with the drive shaft (25) 30) and the step of housing the motor (20) in the casing (11). Here, the main part of the process of processing the components of the compression mechanism (30) will be described.

  In the process of processing the component parts of the compression mechanism (30), an orbiting scroll machining process, a housing machining process, a fixed scroll machining process, a measurement process, and a target setting process are performed.

  As shown in FIG. 9, in the manufacturing method of the scroll compressor (10) of this embodiment, a turning scroll process and a housing process become a pre-process, and a fixed scroll process becomes a post-process. In the scroll compressor (10) of the present embodiment, the fixed scroll (40) processed in the post-processing step is the first component, and the orbiting scroll (50) and the housing (60) processed in the pre-processing step are provided. This is the second part.

  The orbiting scroll machining process and the housing machining process, which are the pre-machining process, are performed before the measurement process and the target setting process. The pre-processing steps, i.e., the orbiting scroll processing step and the housing processing step, may be performed one after the other or both may be performed simultaneously in parallel. The fixed scroll processing step, which is a post-processing step, is performed after the measurement step and the target setting step.

<Orbiting scroll machining process>
In the orbiting scroll machining process, the surface of the orbiting wrap (52), the front surface of the orbiting end plate portion (51), the inner peripheral surface of the boss portion (53), and the surface of the key groove (54) are cut (See FIGS. 2 and 3). That is, in the orbiting scroll machining process, machining of the orbiting side wrap (52) and the boss portion (53) is performed. In this orbiting scroll machining process, the machining conditions of the orbiting side wrap (52) and the boss (53) are such that the central axis CL _OW of the orbiting side wrap (52) and the central axis CL _OB of the boss (53) coincide. Is set as a target condition (ie, a condition where the target value of the dimensional deviation D _O of the orbiting scroll (50) is zero).

<Housing processing process>
In the housing processing step, the protruding end surface of the holding projection (66), the surface of the peripheral portion of the crank chamber (62), the inner peripheral surface of the bearing (64), and the surface of the key groove (63) Cutting is performed (see FIGS. 6 and 7). Further, in the housing processing step, processing for forming the positioning hole (67) in the holding projection (66) is performed. That is, in the housing processing step, processing of the bearing portion (64) and the positioning hole (67) is performed. In this housing processing step, the processing conditions of the bearing portion (64) and the positioning hole (67) are the conditions aimed at matching the central axis CL _HB of the bearing portion (64) with the central axis on the housing side CL _HP (ie , And the condition where the target value of the dimensional deviation D _H of the housing (60) is zero.

<Measurement process>
In the measurement step, measurement of dimensions is performed for each of the orbiting scroll (50) processed in the orbiting scroll processing step and the housing (60) processed in the housing processing step. Then, in the measuring step, the dimensional deviations D _O of the orbiting scroll (50), and dimensional deviations D _H of the housing (60) is calculated.

Specifically, in the measurement process, based on the measurement values of the dimensions of the orbiting scroll (50), the position of the center point CP _OW of the orbiting side wrap (52), a point on the center axis CL _OB of the boss (53) The position of CP _OB is calculated (see FIGS. 2 and 3). As described above, the dimension deviation D _O of the orbiting scroll (50) is a vector having the point CP _OW as the start point and the point CP _OB as the end point. In the measurement step, a vector D _O that is a dimensional deviation of the orbiting scroll (50) is specified based on the calculated positions of the point CP _OW and the point CP _OB .

In the measurement process, based on the measurement value of the dimensions of the housing (60), the position of the point CP _HB on the central axis CL _HB of the bearing (64) and the point CP _HP on the housing side central axis CL _HP The position is calculated (see FIGS. 6 and 7). As described above, the dimensional deviation _DH of the housing (60) is a vector starting from the point CP _HB and ending at the point CP _HP . In the measurement step, a vector _DH that is a dimensional deviation of the housing (60) is specified based on the calculated positions of the point CP _HB and the point CP _HP .

Target setting process
In the target setting step, a target value of the dimensional deviation _DF of the fixed scroll (40) processed in the fixed scroll processing step which is a post-processing step is set. In this target setting step, a target vector D _F ′ = (x _F ′, y _F ′), which is a target value of the dimensional deviation D _F of the fixed scroll (40), of the orbiting scroll (50) calculated in the measurement step. The dimension deviation D _O is set so as to cancel out the dimension deviation D _H of the housing (60). Here, the target setting process will be described with reference to FIG.

FIG. 10 shows two-dimensional coordinates with the origin point O at the center point CP _OW of the turning side wrap (52). In this two-dimensional coordinate, the dimensional deviation of the orbiting scroll (50) obtained in the measuring process is set as a vector D _O = (x _O , y _O ), and the dimensional deviation of the housing (60) obtained in the measuring process is set as a vector D. _{Let H} = (x _H , y _H ).

The virtual state where the center axis _{CL OB} and the bearing portion of the housing (60) of the boss (53) is the central axis _{CL HB} (64) matching of the orbiting scroll (50), on the central axis _{CL OB} of the boss (53) The point CP _OB coincides with the point CP _HB on the central axis CL _HB of the bearing portion (64). Accordingly, in the two-dimensional coordinates of FIG. 10, the dimensional deviation (vector D _O ) of the orbiting scroll (50) is a vector having the origin O as the starting point and the point A as the ending point, and the dimensional deviation (vector D) of the housing (60). _H ) is a vector starting from the point A and ending at the point B. Point A is a point CP _OB on the central axis CL _OB of the boss portion (53) and a point CP _HB on the central axis CL _HB of the bearing portion (64). Point B is a point CP _HP on the housing side central axis CL _HP .

The relative positions of the fixed scroll (40) and the housing (60) are set by positioning pins (35) that fit into the positioning holes (44, 67). In the fixed scroll (40), the point CP _FP on the fixed-side central axis CL _FP has the same distance from the central axis CA _{FP of} each positioning hole (44). Further, in the housing (60), _{CP HP} point on the housing side the center axis _{CL HP} is equal distance from the central axis _{CA HP} of each of the positioning holes (67). For this reason, the point CP _FP of the fixed scroll (40) coincides with the point CP _HP of the housing (60). Therefore, in FIG. 10, the start point of the vector D _F which is the dimensional deviation of the fixed scroll (40) is the point B.

The end point of the vector _DF , which is the dimensional deviation of the fixed scroll (40), is the center point CP _FW of the fixed wrap (42). Therefore, to offset the dimensional deviations D _H of dimensional deviations of the fixed scroll (40) dimensional deviations D _O a housing (vector D _F) by the orbiting scroll (50) (60), the origin end point of the vector D _F It should be O. In other words, the vector _{D F} a (dimensional deviations of the fixed scroll (40)), the vector _{D O} sum (vector _D of a vector _{D H} (dimensional deviations of the orbiting scroll (50)) (dimensional deviations of the housing (60)) O + The inverse vector of the vector D _H = (x _O + x _H , y _O + y _H )) may be used. Therefore, in the target setting process, the target vector D _F ′, which is the target value of the dimensional deviation of the fixed scroll (40), is D _F ′ = (x _F ′, y _F ′) = (− (x _O + x _H ), It is set to-(y _O + y _H )).

Fixed Scroll Machining Process
In the fixed scroll processing step, cutting is performed on the surface of the fixed side wrap (42), the front surface of the fixed side end plate portion (41), and the front surface of the outer peripheral wall portion (43) (FIGS. 4 and 5). See). Further, in the fixed scroll processing step, processing for forming the positioning hole (44) in the outer peripheral wall (43) is performed. That is, in the fixed scroll machining process, machining of the fixed side wrap (42) and the positioning hole (44) is performed. In this fixed scroll processing step, the fixed side wrap (42) and the positioning hole (44) are processed under the processing conditions such that the vector _DF, which is the dimensional deviation of the fixed scroll (40), becomes the target vector _DF '. It will be.

-Dimension deviation of compression mechanism-
Regarding the scroll compressor (10) manufactured by the manufacturing method of the present embodiment, the dimensional deviations of the orbiting scroll (50), the fixed scroll (40), and the housing (60) and the total deviation that is the sum of them are described. Do.

<Dimensional deviation of orbiting scroll>
As described above, in the orbiting scroll machining process, the orbiting side lap (52) is processed under the processing condition aiming to make the central axis CL _OW of the orbiting side lap (52) and the central axis CL _OB of the boss (53) coincide with each other. And bosses (53) are processed.

In an actual orbiting scroll machining process, machining errors occur. For this reason, the central axis CL _{OW of} the turning side wrap (52) and the central axis CL _OB of the boss portion (53) do not usually coincide with each other. FIG. 11 shows the distribution of the dimensional deviation (vector D _O ) for several tens of orbiting scrolls (50) in two-dimensional coordinates. In FIG. 11, the origin of the two-dimensional coordinates is a point CP _OW (that is, the starting point of the vector D _O ) on the central axis CL _OW of the turning side wrap (52). The point on the two-dimensional coordinates is a point CP _OB (that is, an end point of the vector D _O ) on the central axis CL _OB of the boss part (53).

In the two-dimensional coordinates of FIG. 11, the point _{CP OB} (the end point of the vector _{D O)} is, x coordinate _{x Oi (i = 1,2, ····} , n) a, y coordinate _{y Oi} (i = 1, 2, ..., n). The x-direction component and the y-direction component of the dimensional deviation (vector D _O ) of the orbiting scroll (50) are normal distributions as shown in FIG. In the dimensional deviation (vector D _O ) of the orbiting scroll (50), the variance of the x direction component is V _Ox and the variance of the y direction component is V _Oy .

In the turning scroll processing step, the turning side wrap (52) is processed from the front side of the turning side mirror plate portion (51), and the boss portion (53) is processed from the back side of the turning side mirror plate portion (51). . For this reason, in the orbiting scroll machining process, a relatively large machining error occurs. Therefore, normally, the dimensional deviation (vector D _O ) of the orbiting scroll (50) is relatively large in the variance V _Ox of the x-direction component and the variance V _Oy of the y-direction component.

<Dimensional deviation of housing>
As described above, in the housing processing step, the bearing portion (64) and the positioning hole (67) are processed under a processing condition aimed at matching the central axis CL _HB of the bearing portion (64) with the central axis CL _{HP of the} housing side. Processing is performed.

In an actual housing processing process, processing errors occur. Therefore, the central axis _{CL HB} housing side the center axis _{CL HP} and the bearing portion (64) is usually not identical. FIG. 12 shows the distribution of the dimensional deviations (vector D _H ) of several dozen housings (60) in two-dimensional coordinates. In FIG. 12, the origin of the two-dimensional coordinates is a point CP _HB (that is, the starting point of the vector _DH ) on the central axis CL _HB of the bearing portion (64). Further, the point on the two-dimensional coordinates, a point on the housing side the center axis _{CL HP CP HP} (i.e., the end point of the vector _{D H).}

In the two-dimensional coordinates of FIG. 12, the point CP _HP (the end point of the vector _DH ) has an x coordinate of x _Hi (i = 1, 2,..., N) and a y coordinate of y _Hi (i = 1,2, ..., n). The probability distribution of the x-direction component and the y-direction component of the dimensional deviation (vector D _H ) of the housing (60) is a normal distribution as shown in FIG. In the dimensional deviation (vector D _H ) of the housing (60), the variance of the x-direction component is V _Hx and the variance of the y-direction component is V _Hy .

The bearing (64) of the housing (60) forms a hole penetrating the main body (61). Therefore, in the housing processing step, the position of the center axis CL _HB is determined by measuring the bearing portion (64) from the front side of the main body (61) while keeping the posture of the workpiece constant, and the specified center axis CL The processing position of the positioning hole (67) can be determined based on the position of _HB . For this reason, the processing error generated in the housing processing step is usually smaller than the processing error generated in the orbiting scroll processing step. Therefore, normally, the variance V _Hx of the x-direction component and the variance V _Hy of the y-direction component of the dimensional deviation (vector D _H ) of the housing (60) are respectively the dimensional deviation (vector D _O ) of the orbiting scroll (50). It becomes smaller than the variance V _Ox and the variance V _Oy .

<Dimensional deviation of fixed scroll>
As described above, in the fixed scroll processing step, the fixed side wrap (42) and the positioning hole (44) are formed under processing conditions aiming to make the dimensional deviation of the fixed scroll (40) match the target vector D _F '. Processing is performed.

Target vector D _{F 'is} set so as to offset the dimensional deviations D _H of dimensional deviations D _O and the housing of the orbiting scroll (50) (60). Therefore, the target vector D _F ′ includes the processing error generated in the orbiting scroll processing step and the processing error generated in the housing processing step. Furthermore, processing errors also occur in the fixed scroll processing process. For this reason, the dimensional deviation (vector D _F ) of the fixed scroll (40) processed in the fixed scroll processing step does not normally coincide with the target vector D _F ′.

FIG. 13 shows the distribution of each dimensional deviation (vector D _F ) in two-dimensional coordinates for several tens of fixed scrolls (40) processed by the fixed scroll processing step of the present embodiment. 13, the origin of the two-dimensional coordinates is a point on the fixed side center axis _{CL FP CP FP} (i.e., the start point of the vector _{D F).} The point on the two-dimensional coordinates is a point CP _FW (that is, the end point of the vector _DF ) on the central axis CL _FW of the fixed side wrap (42).

In the two-dimensional coordinates in FIG. 13, the point CP _FW (the end point of the vector D _F ) has an x coordinate of x _Fi (i = 1, 2,..., N) and a y coordinate of y _Fi (i = 1,2, ..., n). The probability distribution of the dimensional deviation (vector D _F ) of the fixed scroll (40) and the y-direction component are normal distributions as shown in FIG. In the dimensional deviation (vector D _F ) of the fixed scroll (40), the variance of the x-direction component is V _Fx and the variance of the y-direction component is V _Fy .

In the dimensional deviation (vector D _F ) of the fixed scroll (40) processed in the fixed scroll processing process, the processing error of the orbiting scroll processing process and the housing processing process included in the target vector D _F ′ Processing error is included.

Therefore, the variance V _Fx of the x direction component of the dimensional deviation (vector D _F ) of the fixed scroll (40) is the variance V _Ox of the x direction component of the dimensional deviation (vector D _O ) of the orbiting scroll (50) And the variance V _Hx of the x direction component of the dimensional deviation (vector D _H ) of (60). Specifically, the variance V _Fx is greater than or equal to the sum of the variance V _Ox and the variance V _Hx (V _Fx V V _Ox + V _Hx ).

Also, the variance V _Fy of the y-direction component of the dimensional deviation (vector D _F ) of the fixed scroll (40) is the variance V _Oy of the y-direction component of the dimensional deviation (vector D _O ) of the orbiting scroll (50) 60) includes the variance V _Hy of the y-direction component of the dimensional deviation (vector D _H ). Specifically, the variance V _Fy is greater than or equal to the sum of the variance V _Oy and the variance V _Hy (V _Fy V V _Oy + V _Hy ).

Also, processed fixed scroll in the fixed scroll processing step of this embodiment (40), the dispersion V _Fy of variance V _Fx and y-direction component in the x direction component of the dimensional deviations of the fixed scroll (40) (Vector D _F) Of each are greater than the variance of the spacing L _FP between the two locating holes (44). The distance L _FP between the positioning holes (44) is the distance between the central axes CA _FP of the positioning holes (44) (see FIG. 5).

<Processing error that occurs in fixed scroll machining process>
The processing error which arises in the fixed scroll processing process of this embodiment is explained. The processing error generated in the fixed scroll processing step of the present embodiment is substantially the same as the processing error generated in the general fixed scroll processing step.

In a general fixed scroll machining process, the fixed side central axis CL _FP and the central axis CL _FW of the fixed side wrap (42) are made to coincide (that is, the dimensional deviation _DF of the fixed scroll (40) is made zero) The fixed-side wrap (42) and the positioning hole (44) are processed under the processing conditions targeted at. FIG. 18 shows the distribution of each dimensional deviation (vector D _F ) in two-dimensional coordinates for several dozen fixed scrolls (40) processed in a general fixed scroll machining process. The two-dimensional coordinates in FIG. 18 are the same as the two-dimensional coordinates shown in FIG.

  In both the fixed scroll processing step and the general fixed scroll processing step of the present embodiment, both the fixed side wrap (42) and the positioning hole (44) are processed from the projecting end surface side of the outer peripheral wall portion (43). Done. For this reason, the machining error that occurs in the fixed scroll machining process is usually smaller than the machining error that occurs in the orbiting scroll machining process.

Therefore, when the fixed scroll (40) is processed under the processing conditions aiming to make the dimensional deviation _DF of the fixed scroll (40) zero, the dimensional deviation (vector D _F ) of the fixed scroll (40) is usually The variance V _Fx of the x-direction component and the variance V _Fy of the y-direction component are smaller than the variance V _Ox and the variance V _Oy of the dimensional deviation (vector D _O ) of the orbiting scroll (50), respectively. In this case, dimensional deviations of the fixed scroll (40) distributed _{V Fy} of variance _{V Fx} and y-direction component in the x direction component of (vector _{D F),} respectively, the housing (60) dimension deviation (vector _D H) Smaller than the variance V _Hx and the variance V _{Hy of}

<Total deviation>
Total deviation _{D AS} is the sum of the dimensional deviations (vector _{D F)} of the dimensional deviations (vector _{D H)} and the fixed scroll (40) of the dimensional deviations (vector _{D O)} and the housing (60) of the orbiting scroll (50), is the sum of the vector _{D O} and the vector _{D H} and the vector _{D F.} The end point of the combined vector D _AS , which is the sum of the vector D _O , the vector D _H, and the vector D _F , is the end point C of the vector D _F starting from the point B (see FIG. 10).

As shown in FIG. 10, when the dimensional deviation (vector D _F ) of the fixed scroll (40) matches the target vector D _F ′, the total deviation becomes zero (zero vector). However, processing errors also occur in the fixed scroll processing step which is the post processing step. For this reason, in most cases, the dimensional deviation (vector D _F ) of the fixed scroll (40) is different from the target vector D _F ′, and therefore the total deviation does not become zero.

As described above, when the fixed scroll (40) is processed under the processing conditions aiming to make the dimensional deviation _DF of the fixed scroll (40) zero, the processing error occurring in the fixed scroll processing step of the present embodiment This is substantially the same as the machining error. Therefore, the end point C of the synthetic vector _{D AS} is the sum of the vector _{D O} and the vector _{D H} and the vector _{D F} is located in region _{A AS1} in FIG.

In FIG. 10, the area A _AS1 is schematically assumed to be a perfect circle centered on the origin O. In practice, the area A _AS1 is a slightly distorted circle, and the center of the area A _AS1 is slightly deviated from the origin O.

In the present embodiment, dimensional deviations of dimensional deviations of the orbiting scroll (50) (Vector D _O) and the housing (60) (Vector D _H) is offset by dimensional deviations of the fixed scroll (40) (Vector D _F) . Therefore, practically, only the machining error generated in the fixed scroll machining process, which is a post-machining process, causes the total deviation (vector D _AS ) in the present embodiment.

FIG. 14 shows, in two-dimensional coordinates, the distribution of the total deviation (vector D _AS ) of several tens of sets of orbiting scrolls (50), fixed scrolls (40) and housing (60). In FIG. 14, the origin of the two-dimensional coordinates is a point CP _OW (that is, the start point of the vector D _AS ) on the center axis CL _OW of the turning side wrap (52). Further, the point on the two-dimensional coordinates, a point on the center axis _{CL FW CP FW} of the fixed wrap (42) (end point of the vector _{D AS).}

In the two-dimensional coordinates of FIG. 14, the point CP _FW (ie, the end point of the vector D _AS ) has an x coordinate of x _ASi (i = 1, 2,..., N) and a y coordinate of y _ASi ( i = 1, 2, ..., n). The x-direction component and the y-direction component of the total deviation (vector D _AS ) are normal distributions whose probability distributions are as shown in FIG. Also, in the total deviation (vector D _AS ), the variance of the x-direction component is V _ASx , and the variance of the y-direction component is V _ASy .

As described above, the cause of the total deviation (vector D _AS ) in the present embodiment is substantially only the processing error generated in the fixed scroll processing step which is the post-processing step. Therefore, the variance V _ASx of the x-direction component of the total deviation (vector D _AS ) shown in FIG. 14 and the variance V _ASy of the y-direction component are the dimensional deviation (vector D _F ) of the fixed scroll (40) shown in FIG. ) substantially coincides with the variance _{V Fy} of variance _{V Fx} and y-direction component in the x direction component of. As described above, FIG. 18 shows the fixed state when the fixed side wrap (42) and the positioning hole (44) are processed under the processing conditions aimed at zeroing the dimensional deviation _DF of the fixed scroll (40). The distribution of the dimensional deviation (vector D _F ) of the scroll (40) is shown.

However, when the dimensions of the orbiting scroll (50), the fixed scroll (40), and the housing (60) are measured by a measuring instrument, the measured values of the obtained dimensions include errors of the measuring instrument. For this reason, the variance V _ASx and variance V _ASy of the total deviation (vector D _AS ) shown in FIG. 14 are the variance V _Fx and variance V _Fy of the dimensional deviation (vector D _F ) of the fixed scroll (40) shown in FIG. Not exactly the same.

As described above, the fixed scroll processing steps processed fixed scroll in the present embodiment (40), the dispersion of dimensional deviations D _F is the variance of the dimensional deviations D _O of the orbiting scroll (50), the housing (60 And the variance of the dimensional deviation D _H ). Therefore, the variance V _ASx of the x-direction component and the variance V _ASy of the y-direction component of the total deviation (vector D _AS ) shown in FIG. 14 are respectively the dimensional deviation (vector D _F ) of the fixed scroll (40) shown in FIG. _Is smaller than the variance V _Fx of the x-direction component and the variance V _{Fy of the} y-direction component.

-Effect of Embodiment 1-
The manufacturing method of the present embodiment supports the orbiting scroll (50) in which the orbiting side wrap (52) and the boss part (53) are formed, and the rotating shaft connected to the boss part (53) of the orbiting scroll (50). And a fixed scroll (40) fixed to the housing (60) formed with the fixed side wrap (42) engaged with the turning side wrap (52). Manufactures a scroll fluid machine in which each of the fixed scroll (40) and the housing (60) has a plurality of positioning holes (44,67) for determining the fixed position of the fixed scroll (40) with respect to the housing (60). It is a method to do.

  The manufacturing method of the present embodiment includes a turning scroll processing step for processing the turning side wrap (52) and the boss portion (53) of the turning scroll (50) that is a workpiece, and a fixed scroll (40) that is a workpiece. Fixed scroll processing step of processing the fixed side wrap (42) and the positioning hole (44), and housing processing step of processing the bearing portion (64) and the positioning hole (67) of the housing (60) which is a workpiece Is provided. Further, in the manufacturing method of the present embodiment, the orbiting scroll processing step and the housing processing step are pre-processing steps, and the fixed scroll processing step is a post-processing step.

Further, in the manufacturing method of the present embodiment, the deviation of the central axis CL _OB of the boss portion (53) with respect to the central axis CL _OW of the turning side wrap (52) is the dimensional deviation D _O of the turning scroll (50). Let the straight line located at the shortest equidistant distance from each positioning hole (67) be the housing side central axis CL _HP and the deviation of the housing side central axis CL _HP relative to the central axis CL _HB of the bearing (64) be the housing (60) of the dimensional deviations D _H, a straight line is positioned equidistant the shortest from the positioning hole (44) of the fixed scroll (40) and the fixed side center axis CL _FP, fixed scroll wrap relative to the fixed center axis CL _FP (42) the center axis CL of the _FW deviation and dimensional deviations D _F of the fixed scroll (40), dimensional deviations D of dimensional deviations D _O and the housing (60) of the dimensional deviations D _H and the fixed scroll of the orbiting scroll (50) (40) of _F Total and total deviation _{D AS.}

  In the manufacturing method of the present embodiment, the orbiting scroll processing step and the housing processing step are pre-processing steps, and the fixed scroll processing step is a post-processing step. And the manufacturing method of this embodiment was measured in the measurement process and measurement process which measure the dimensional deviation of the turning scroll (50) and the housing (60) processed in the pre-processing process after the end of the pre-processing process. The fixed scroll (40) processed in the post-processing step so that the dimensional deviation of the orbiting scroll (50) and the housing (60) is offset by the dimensional deviation of the fixed scroll (40) processed in the post-processing step. And a target setting step for setting a target value of the dimensional deviation. In the post-processing step, the fixed scroll (40) is set so that the dimensional deviation of the fixed scroll (40) becomes the target value set in the target setting step. Processing.

  Here, in the manufacturing method of the conventional scroll compressor (10), the orbiting scroll (50), the fixed scroll (40), and the housing (60) are processed with the goal of making each dimensional deviation zero. It was done on condition. For each of a number of mass produced scroll compressors (10), the dimensional deviations of the orbiting scroll (50), fixed scroll (40) and housing (60) may or may not cancel each other. .

FIG. 19 shows the dimension deviation (vector D _O ) of the orbiting scroll (50), the dimension deviation (vector D _F ) of the fixed scroll (40) and the housing (60) in the scroll compressor (10) manufactured by the conventional manufacturing method. dimensional deviations (vector D _H) of the), and setting the same two-dimensional coordinates as FIG. The end point C of the composite vector D _AS , which is the sum of the vector D _O , the vector D _H and the vector D _F , is located within the area A _AS5 of FIG. FIG. 20 shows the distribution of the total deviation (synthetic vector D _AS ) in the scroll compressor (10) manufactured by the conventional manufacturing method, in the same two-dimensional coordinates as FIG.

On the other hand, offset in the manufacturing method of this embodiment, the target setting step, dimensional deviations D _O of the orbiting scroll (50) and the dimensional deviations D _H of the housing (60), the dimensional deviations D _F of the fixed scroll (40) In this manner, the target value of the dimensional deviation _DF of the fixed scroll (40) is set. Further, in the manufacturing method of the present embodiment, in the fixed scroll processing step, the “dimensional deviation (vector D _F ) of the fixed scroll (40)” is “the target value set in the target setting step (target vector D _F ′)”. The fixed scroll (40) is processed so that

Therefore, as shown in FIG. 10, the dimensional deviations D _H of dimensional deviations D _O and the housing of the orbiting scroll (50) (60) it is offset by dimensional deviations D _F of the fixed scroll (40). As a result, the size of the area A _AS1 where the end point C of the vector D _AS (total deviation) can exist can be significantly reduced compared to the area A _AS5 shown in FIG. And, it is clear when FIG. 14 and FIG. 20 are compared, but according to the manufacturing method of this embodiment, the variance V _ASx and V of each of the x direction component and the y direction component of the total deviation (vector D _AS ) _ASy can be significantly reduced _compared to the prior _art .

Therefore, according to the manufacturing method of the present embodiment, the dispersion of the total deviation D _AS is lowered while the processing of the orbiting scroll (50), the housing (60) and the fixed scroll (40) is performed with the same processing accuracy as before. be able to. Therefore, the design values of the dimensions of the orbiting scroll (50), the housing (60), and the fixed scroll (40) can be made closer to the ideal dimensions when the machining error is zero. As a result, the gap between the turning side wrap (52) and the fixed side wrap (42) in the assembled state can be reduced, and the amount of fluid leaking from the compression chamber (31) through this gap can be reduced. Therefore, according to the present embodiment, the efficiency of the scroll compressor (10) can be improved while suppressing an increase in the manufacturing cost of the scroll compressor (10).

In the scroll compressor (10) manufactured by the manufacturing method of the present embodiment, the dispersion of the dimensional deviation D _F of the fixed scroll (40) is different from the dispersion of the dimensional deviation D _O of the orbiting scroll (50) and the housing (60). ) encompassing the dispersion and dimension deviation D _H of, and variance of the total deviation D _aS is smaller than the variance of the dimensional deviations D _F of the fixed scroll (40).

Conventionally, the variance of the total deviation could not be less than the variance of the dimensional deviation of the fixed scroll (40). However, according to this embodiment, by offsetting in dimensional deviations D _F of dimensional deviations D _O and dimensional deviations D _H and the stationary scroll housing (60) of the orbiting scroll (50) (40), the total deviation D It is possible to make the variance of _AS smaller than the variance of the dimensional deviation _DF of the fixed scroll (40). Therefore, according to the present embodiment, it is possible to reduce the variance of the total deviation D _AS without increasing the processing accuracy of the orbiting scroll (50), the housing (60) and the fixed scroll (40) compared to the prior art. It is possible to improve the efficiency of the compressor (10).

In addition, the scroll compressor (10) manufactured by the manufacturing method of the present embodiment has the fixed scroll (40) such that the variance of the total deviation D _AS is smaller than the variance of the dimensional deviation D _F of the fixed scroll (40). ) Of the dimensional deviation D _F is larger than the variance of the interval L _FP between the plurality of positioning holes (44) formed in the fixed scroll (40).

Thus, by offsetting in dimensional deviations D _F of dimensional deviations D _O and dimensional deviations D _H and the stationary scroll housing (60) of the orbiting scroll (50) (40), a "dispersion of total deviation D _AS" It becomes possible to make it smaller than “dispersion of dimensional deviation _DF of fixed scroll (40)”. Therefore, according to the present embodiment, it is possible to reduce the variance of the total deviation D _AS without increasing the processing accuracy of the orbiting scroll (50), the housing (60) and the fixed scroll (40) compared to the prior art. It is possible to improve the efficiency of the compressor (10).

  Note that the dispersion of the dimensional deviation of the orbiting scroll (50), the housing (60), and the fixed scroll (40) is approximately 30 for each of the orbiting scroll (50), the housing (60), and the fixed scroll (40). This can be calculated by measuring

<< Embodiment 2 >>
The scroll compressor (10) of the second embodiment and a method of manufacturing the same will be described. Here, differences between the scroll compressor (10) of the present embodiment and the method of manufacturing the same according to the first embodiment will be described.

-Manufacturing method of scroll compressor-
In the method of manufacturing the scroll compressor (10) of the present embodiment, the orbiting scroll processing step and the fixed scroll processing step are pre-processing steps, and the housing processing step is post-processing steps. One of the orbiting scroll processing step and the fixed scroll processing step, which are pre-processing steps, may be performed after the other, or both may be performed simultaneously. Further, in the scroll compressor (10) of the present embodiment, the orbiting scroll (50) and the fixed scroll (40) which are processed in the pre-processing step are the housing (60) processed in the post-processing step. It becomes the second part.

<Orbiting scroll machining process>
The orbiting scroll machining process of the present embodiment is the same as the orbiting scroll machining process of the first embodiment. That is, in the orbiting scroll processing step of the present embodiment, the processing condition (that is, the orbiting scroll (i.e., the orbiting scroll) aims to match the central axis CL _OW of the orbiting side wrap (52) and the central axis CL _OB of the boss portion (53). in the target value of the dimensional deviations D _O 50) was zero processing conditions), the processing is performed of the orbiting side wrap (52) and the boss portion (53).

<Fixed scroll processing process>
The fixed scroll processing step of the present embodiment is different from the fixed scroll processing step of the first embodiment in processing conditions. In the fixed scroll processing step of the present embodiment, the processing condition (that is, the dimensional deviation D of the fixed scroll (40)) is aimed at matching the fixed side central axis CL _FP with the central axis CL _FW of the fixed side wrap (42). _The processing of the fixed side wrap (42) and the positioning hole (44) is performed under the processing conditions where the target value of _F is zero.

<Measurement process>
In the measurement process, dimensions are measured for each of the orbiting scroll (50) processed in the orbiting scroll processing process and the fixed scroll (40) processed in the fixed scroll processing process. In the measuring step, the dimensional deviation D _O of the orbiting scroll (50) and the dimensional deviation _DF of the fixed scroll (40) are calculated.

Calculating a dimensional deviations D _O of the orbiting scroll (50) is the same as Embodiment 1. That is, in the measurement process, the position of the center point CP _OW of the turning side wrap (52) and the position of the point CP _OB on the center axis CL _OB of the boss (53) are calculated, and the turning is performed based on those positions. is the dimension deviation of the scroll (50) vector D _O is identified.

In the measurement process, the position of the center point CP _FW of the fixed side wrap (42) and the position of the point CP _FP on the fixed side central axis CL _FP are calculated based on the measured values of the dimensions of the fixed scroll (40). (See FIGS. 4 and 5). As described above, the dimension deviation _DF of the fixed scroll (40) is a vector having the point CP _FP as the start point and the point CP _FW as the end point. In the measurement process, a vector _DF that is a dimensional deviation of the fixed scroll (40) is specified based on the calculated positions of the point CP _FW and the point CP _FP .

Target setting process
In the target setting step, a target value of the dimensional deviation _DH of the housing (60) to be processed in the housing processing step which is a post-processing step is set. Here, the target setting process of the present embodiment will be described with reference to FIG.

FIG. 15 is a view corresponding to FIG. 10 regarding the first embodiment. This FIG. 15 shows the two-dimensional coordinate which makes the origin O the center point _CPOW of the turning side lap _| wrap (52). In this two-dimensional coordinate, the dimensional deviation of the orbiting scroll (50) obtained in the measurement process is set as vector D _O = (x _O , y _O ), and the dimensional deviation of the fixed scroll (40) obtained in the measurement process is vectored Let D _F = (x _F , y _F ).

The target setting step of the present embodiment, the housing (60) the target vector D _{H 'which} is a target value of the dimensional deviations D _H of dimensional deviations D _O and the fixed scroll of the calculated orbiting scroll in the measurement step (50) ( 40) is set so as to offset with the dimensional deviation _DF . Specifically, in the target setting step, the target vector D _H ′ = (x _H ′, y _H ′) is calculated by the vector D _O (dimensional deviation of the orbiting scroll (50)) and the vector D _F (fixed scroll (40)). the sum of the dimensional deviations) (vector _{D O} + vector _{D F = (x O + x} F, y O + y F) is set to the inverse vector of). That is, the target vector D _H ′ becomes D _H ′ = (x _H ′, y _H ′) = (− (x _O + x _F ), − (y _O + y _F )).

<Housing processing process>
The housing processing process of the present embodiment is different from the housing processing process of the first embodiment in processing conditions. In the housing processing step of the present embodiment, processing of the bearing portion (64) and the positioning hole (67) is performed under processing conditions such that the vector _DH which is a dimensional deviation of the housing (60) becomes the target vector D _H '. It will be.

−Dimensional deviation of compression mechanism−
Regarding the scroll compressor (10) manufactured by the manufacturing method of the present embodiment, the dimensional deviations of the orbiting scroll (50), the fixed scroll (40), and the housing (60) and the total deviation that is the sum of them are described. Do. The dimensional deviation of the orbiting scroll (50) is the same as that of the first embodiment, and thus the description thereof is omitted.

<Dimensional deviation of fixed scroll>
In the fixed scroll processing step of the present embodiment, processing of the fixed scroll (40) is performed under processing conditions aiming to make the dimensional deviation _DF of the fixed scroll (40) zero. Therefore, the dimensional deviation of the fixed scroll (40) processed in the fixed scroll processing step of the present embodiment is the dimensional deviation of the fixed scroll (40) processed in the general fixed scroll processing step described in the first embodiment. Is the same as That is, the variance V _Fx of the x-direction component and the variance V _Fy of the y-direction component of the dimensional deviation (vector D _F ) of the fixed scroll (40) of the present embodiment are respectively the dimensional deviation (vector D) of the orbiting scroll (50). _{O 2} smaller than the variance V _Ox and the variance V _{Oy of O 2} ).

<Dimensional deviation of housing>
As described above, in the housing machining process, the bearing (64) and the positioning hole (67) are machined under the machining conditions aiming to make the dimensional deviation of the housing (60) coincide with the target vector _DH ′. It will be.

The target vector D _H ′ is set so as to cancel out the dimension deviation D _O of the orbiting scroll (50) and the dimension deviation D _F of the fixed scroll (40). Therefore, the target vector D _H ′ includes a machining error that occurs in the orbiting scroll machining process and a machining error that occurs in the fixed scroll machining process. Furthermore, processing errors also occur in the housing processing process. For this reason, the dimensional deviation (vector D _H ) of the housing (60) processed in the housing processing step usually does not coincide with the target vector D _H ′.

The dimensional deviation (vector D _H ) of the housing (60) processed in the housing processing step includes processing errors in the orbiting scroll processing step and the housing (60) fixed scroll processing step included in the target vector D _H ′, and the fixed scroll. And machining errors in the machining process.

Therefore, the variance V _Hx of the x direction component of the dimensional deviation (vector D _H ) of the housing (60) is the variance V _Ox of the x direction component of the dimensional deviation (vector D _O ) of the orbiting scroll (50) and the fixed scroll. This includes the variance V _Fx of the x-direction component of the dimensional deviation (vector D _F ) of (40). Specifically, the variance V _Hx is greater than or equal to the sum of the variance V _Ox and the variance V _Fx (V _Hx V V _Ox + V _Fx ).

Further, the variance V _Hy of the y-direction component of the dimensional deviation (vector D _H ) of the housing (60) is the variance V _Oy of the y-direction component of the dimensional deviation (vector D _O ) of the orbiting scroll (50) 40) and the variance V _Fy of the y-direction component of the dimensional deviation (vector D _F ). Specifically, the variance V _Hy is greater than or equal to the sum of the variance V _Oy and the variance V _Fy (V _Hy V V _Oy + V _Fy ).

Further, in the housing (60) processed in the housing processing step of the present embodiment, each of the dispersion V _Hx of the x direction component of the dimensional deviation (vector D _H ) of the housing (60) and the dispersion V _Hy of the y direction component , The spacing L _HP between two positioning holes (67) is larger than the variance. The distance L _HP between the positioning holes (67) is the distance between the central axes CA _HP of the positioning holes (67) (see FIG. 7).

<Total deviation>
A total deviation D _AS which is the sum of the dimensional deviation of the orbiting scroll (50) (vector D _O ), the dimensional deviation of the housing (60) (vector D _H ) and the dimensional deviation of the fixed scroll (40) (vector D _F ) is is the sum of the vector _{D O} and the vector _{D H} and the vector _{D F.} The end point of the synthesis vector _{D AS} is the sum of the vector _{D O} and the vector _{D H} and the vector _{D F} is the end point C of the vector _{D F} to starting point B (see Figure 15).

As shown in FIG. 15, when the dimensional deviation (vector D _H ) of the housing (60) matches the target vector D _H ′, the total deviation is zero (zero vector). However, processing errors also occur in the housing processing step which is a post processing step. For this reason, in most cases, the dimensional deviation (vector D _H ) of the housing (60) is different from the target vector D _H ′, and therefore the total deviation is not zero.

The processing error that occurs in the housing processing step of the present embodiment is substantially the processing error that occurs when processing the housing (60) under processing conditions aiming to make the dimensional deviation D _H of the housing (60) zero. The same. End point B of the vector D _H is the dimension deviation of the housing (60) is located within the area A _H of FIG. 15. Therefore, the end point C of the combined vector D _AS that is the sum of the vector D _O , the vector D _H, and the vector D _F is located in the area A _AS2 in FIG.

Note that, in FIG. 15, the area A _AS2 is schematically set as a true circle having the origin O as a center. Normally, the actual area A _AS2 is a slightly distorted circle, and the center of the actual area A _AS2 is slightly shifted from the origin O.

As described above, in the housing (60) processed in the housing processing step of the present embodiment, the dispersion of the dimensional deviation D _{H is} the dispersion of the dimensional deviation D _O of the orbiting scroll (50), and the fixed scroll (40) And the variance of the dimensional deviation D _F of Thus, the variance V _ASx of the x-direction component of the total deviation (vector D _AS ) and the variance V _ASy of the y-direction component are the variance V _Hx of the x-direction component of the housing (60) (vector D _H ) and _Less than the variance V _Hy of the y-direction component.

-Effect of Embodiment 2-
In the manufacturing method of the present embodiment, the orbiting scroll processing step and the fixed scroll processing step are pre-processing steps, and the housing processing step is a post-processing step. And the manufacturing method of this embodiment is measured in the measurement process which measures the dimensional deviation of the turning scroll (50) and fixed scroll (40) processed in the pre-processing process, and the measurement process after the end of the pre-processing process. Of the housing (60) processed in the post-processing step so that the dimensional deviation of the orbiting scroll (50) and the fixed scroll (40) is offset by the dimensional deviation of the housing (60) processed in the post-processing step. And a target setting step of setting a target value of the dimensional deviation, and in the post-processing step, processing of the housing (60) is performed such that the dimensional deviation of the housing (60) becomes the target value set in the target setting step. Do.

According to the manufacturing method of the present embodiment, the processing of the orbiting scroll (50), the housing (60), and the fixed scroll (40) is performed with the same processing accuracy as the conventional method, as in the manufacturing method of the first embodiment. The variance of the total deviation D _AS can be reduced. Therefore, according to the present embodiment, as in the first embodiment, the efficiency of the scroll compressor (10) can be improved while suppressing the increase in the manufacturing cost of the scroll compressor (10).

Further, in the scroll compressor manufactured by the manufacturing method of this embodiment (10), the dispersion of dimensional deviations D _H of the housing (60), dimensional deviations D _O of the dispersion and the fixed scroll of the orbiting scroll (50) (40 ) encompassing the dispersion and dimension deviation D _F of, and variance of the total deviation D _aS is smaller than the variance of the dimensional deviations D _H of the housing (60).

Conventionally, the variance of the total deviation could not be less than the variance of the dimensional deviation of the housing (60). However, according to the present embodiment, the total deviation D by offsetting the dimensional deviation D _O of the orbiting scroll (50) and the dimensional deviation D _F of the fixed scroll (40) by the dimensional deviation D _H of the housing (60) It is possible to make the variance of _AS smaller than the variance of the dimensional deviation D _H of the housing (60). Therefore, according to the present embodiment, it becomes possible to reduce the variance of the total deviation D _AS without increasing the processing accuracy of the orbiting scroll (50), the housing (60), and the fixed scroll (40) as compared with the prior art. It is possible to improve the efficiency of the compressor (10).

Further, the scroll compressor (10) manufactured by the manufacturing method of the present embodiment is of the housing (60) such that the dispersion of the total deviation D _AS is smaller than the dispersion of the dimensional deviation D _H of the housing (60). The dispersion of the dimensional deviation _DH is larger than the dispersion of the distance L _HP between the plurality of positioning holes (67) formed in the housing (60).

For this reason, "the dispersion of the total deviation D _AS " is obtained by offsetting the dimensional deviation D _O of the orbiting scroll (50) and the dimensional deviation D _F of the fixed scroll (40) by the dimensional deviation D _H of the housing (60). It is possible to make smaller than "the dispersion of the dimensional deviation D _H of the housing (60)". Therefore, according to the present embodiment, it becomes possible to reduce the variance of the total deviation D _AS without increasing the processing accuracy of the orbiting scroll (50), the housing (60), and the fixed scroll (40) as compared with the prior art. It is possible to improve the efficiency of the compressor (10).

Embodiment 3
The scroll compressor (10) of the third embodiment and a method of manufacturing the same will be described. Here, differences between the scroll compressor (10) of the present embodiment and the method of manufacturing the same according to the first embodiment will be described.

-Method of manufacturing scroll compressor-
In the method of manufacturing the scroll compressor (10) of the present embodiment, the orbiting scroll processing step is a pre-processing step, and the fixed scroll processing step is a post-processing step. The housing processing step may be performed any time before the step of assembling the compression mechanism (30). In the scroll compressor (10) of the present embodiment, the fixed scroll (40) processed in the post-processing step is the first component, and the orbiting scroll (50) processed in the pre-processing step is the second component. .

<Rotation scroll machining process>
The orbiting scroll machining process of the present embodiment is the same as the orbiting scroll machining process of the first embodiment. In other words, in the orbiting scroll processing step of the present embodiment, the orbiting side wrap (52) center axis CL _OW and the boss portion (53) processing conditions targeted to match the central axis CL _OB of (i.e., the orbiting scroll ( in the target value of the dimensional deviations D _O 50) was zero processing conditions), the processing is performed of the orbiting side wrap (52) and the boss portion (53).

<Measurement process>
The measuring step, the orbiting scroll processing step processed orbiting scroll in (50), carried out the measurement of the dimensions, dimensional deviations D _O of the orbiting scroll (50) is calculated.

Calculating a dimensional deviations D _O of the orbiting scroll (50) is the same as Embodiment 1. That is, in the measurement process, the position of the center point CP _OW of the turning side wrap (52) and the position of the point CP _OB on the center axis CL _OB of the boss (53) are calculated, and the turning is performed based on those positions. is the dimension deviation of the scroll (50) vector D _O is identified.

Target setting process
In the target setting step, a target value of the dimensional deviation _DF of the fixed scroll (40) processed in the fixed scroll processing step which is a post-processing step is set. Here, the target setting process of the present embodiment will be described with reference to FIG.

FIG. 16 is a view corresponding to FIG. 10 regarding the first embodiment. This FIG. 16 shows the two-dimensional coordinate which makes the origin O the center point _CPOW of the turning side lap _| wrap (52). In this two-dimensional coordinate, the dimensional deviation of the orbiting scroll (50) obtained in the measurement step is set as a vector D _O = (x _O , y _O ). Further, in this two-dimensional coordinate, the dimensional deviation of the housing (60) is set as a vector D _H = (x _H , y _H ).

In the target setting step of the present embodiment, the target vector D _F ′ which is the target value of the dimensional deviation D _F of the fixed scroll (40) cancels out the dimensional deviation D _O of the orbiting scroll (50) calculated in the measurement step. Is set as Specifically, in the goal setting step, the target vector D _F ′ = (x _F ′, y _F ′) is set to the inverse vector of the vector D _O (the dimensional deviation of the orbiting scroll (50)). That is, the target vector D _F ′ becomes D _F ′ = (x _F ′, y _F ′) = (− x _O , −y _O ).

Fixed Scroll Machining Process
In the fixed scroll processing step of the present embodiment, as in the first embodiment, the fixed side wrap (42) is processed under such processing conditions that the vector _DF, which is the dimensional deviation of the fixed scroll (40), becomes the target vector _DF '. And the positioning hole (44) are processed.

<Housing processing process>
The housing processing process of the present embodiment is the same as the housing processing process of the first embodiment. That is, in the housing processing step of the present embodiment, the processing conditions aimed at matching the center axis CL _HB of the bearing portion (64) with the housing side center axis CL _HP (that is, the dimensional deviation D _H of the housing (60)). The processing of the bearing portion (64) and the positioning hole (67) is performed under the processing conditions in which the target value of (1) is zero.

-Dimension deviation of compression mechanism-
For the scroll compressor (10) manufactured by the manufacturing method of the present embodiment, the dimensional deviations of the orbiting scroll (50), the fixed scroll (40), and the housing (60) and the total deviation which is their total will be described. To do. The dimensional deviation of the orbiting scroll (50) and the dimensional deviation of the housing (60) are the same as in the first embodiment, and thus the description thereof is omitted.

<Dimensional deviation of fixed scroll>
As described above, in the fixed scroll processing step, the fixed side wrap (42) and the positioning hole (44) are processed under the processing conditions aimed at matching the dimensional deviation of the fixed scroll (40) with the target vector _DF ′. Processing is performed.

The target vector D _F ′ is set to offset the dimensional deviation D _O of the orbiting scroll (50). Therefore, the target vector D _F ′ includes the processing error generated in the orbiting scroll processing step. Furthermore, processing errors also occur in the fixed scroll processing process. For this reason, the dimensional deviation (vector D _F ) of the fixed scroll (40) processed in the fixed scroll machining process usually does not match the target vector D _F ′.

In the dimensional deviation (vector D _F ) of the fixed scroll (40) processed in the fixed scroll processing process, the processing error of the orbiting scroll processing process included in the target vector D _F ′ and the processing error of the fixed scroll processing process included.

Therefore, the variance V _Fx of the x direction component of the dimensional deviation (vector D _F ) of the fixed scroll (40) covers the variance V _Ox of the x direction component of the dimensional deviation (vector D _O ) of the orbiting scroll (50) . Specifically, the variance V _Fx is equal to or greater than the variance V _Ox (V _Fx V V _Ox ).

Further, the variance V _Fy of the y-direction component of the dimensional deviation (vector D _F ) of the fixed scroll (40) covers the variance V _Oy of the y-direction component of the dimensional deviation (vector D _O ) of the orbiting scroll (50). Specifically, the variance V _Fy is equal to or greater than the variance V _Oy (V _Fy V V _Oy ).

Further, the fixed scroll (40) processed in the fixed scroll processing step of the present embodiment is similar to the first embodiment, and the variance V _Fx of the x-direction component of the dimensional deviation (vector D _F ) of the fixed scroll (40) and Each of the variances V _Fy of the y-direction component is larger than the variance of the distance L _FP between the two positioning holes (44).

<Total deviation>
A total deviation D _AS which is the sum of the dimensional deviation of the orbiting scroll (50) (vector D _O ), the dimensional deviation of the housing (60) (vector D _H ) and the dimensional deviation of the fixed scroll (40) (vector D _F ) is is the sum of the vector _{D O} and the vector _{D H} and the vector _{D F.} The end point of the synthesis vector _{D AS} is the sum of the vector _{D O} and the vector _{D H} and the vector _{D F} is the end point C of the vector _{D F} to starting point B (see Figure 16).

As shown in FIG. 16, when the dimensional deviation (vector D _F ) of the fixed scroll (40) matches the target vector D _F ′, the total deviation D _AS is the dimensional deviation (vector D _H ) of the housing (60) Will be equal. Therefore, when the dimensional deviation (vector D _F ) of the fixed scroll (40) matches the target vector D _F ′, the end point C of the resultant vector D _AS is located within the area A _H of FIG. This area A _H is an area where the end point of “the vector D _H (the dimensional deviation of the housing (60) is equal and starting from the origin O)” may exist. In addition, processing errors also occur in the fixed scroll processing step, which is a post-processing step. This processing error is the area A _F in FIG. Therefore, the end point C of the composite vector D _AS which is the sum of the vector D _O , the vector D _H and the vector D _F is located within the area A _AS3 (ie, the area including the area A _H and the area A _F ) in FIG. To do.

Note that, in FIG. 16, the area A _AS3 is schematically set as a true circle having the origin O as a center. Normally, the actual area A _AS3 is a slightly distorted circle, and the center of the actual area A _AS3 is slightly shifted from the origin O.

As described above, the fixed scroll processing steps processed fixed scroll in the present embodiment (40), the dispersion of dimensional deviations D _F is, encompasses the dispersion of dimensional deviations D _O of the orbiting scroll (50). Therefore, the variance V _ASx of the x direction component and the variance V _ASy of the y direction component of the total deviation (vector D _AS ) are respectively the variance V _Fx of the x direction component of the dimensional deviation (vector D _F ) of the fixed scroll (40). And smaller than the variance V _Fy of the y-direction component.

-Effect of Embodiment 3-
In the manufacturing method of the present embodiment, the orbiting scroll processing step is a pre-processing step, and the fixed scroll processing step is a post-processing step. And the manufacturing method of this embodiment is the measurement process which measures the dimensional deviation of the turning scroll (50) processed in the pre-processing process after the end of the pre-processing process, and the rotation scroll (50) measured in the measuring process Target setting to set the target value of the dimensional deviation of the fixed scroll (40) processed in the post-processing step so that the dimensional deviation of the offset is offset by the dimensional deviation of the fixed scroll (40) processed in the post-processing step In the post-processing step, the fixed scroll (40) is processed so that the dimensional deviation of the fixed scroll (40) becomes the target value set in the target setting step.

According to the manufacturing method of the present embodiment, the processing of the orbiting scroll (50), the housing (60), and the fixed scroll (40) is performed with the same processing accuracy as the conventional method, as in the manufacturing method of the first embodiment. The variance of the total deviation D _AS can be reduced. Therefore, according to the present embodiment, as in the first embodiment, the efficiency of the scroll compressor (10) can be improved while suppressing the increase in the manufacturing cost of the scroll compressor (10).

In Embodiment scroll compressor manufactured by the manufacturing method of (10), the dispersion of dimensional deviations D _F of the fixed scroll (40) to encompass the dispersion of dimensional deviations D _O of the orbiting scroll (50), And the variance of the total deviation D _AS is less than the variance of the dimensional deviation D _F of the fixed scroll (40).

Conventionally, the variance of the total deviation could not be less than the variance of the dimensional deviation of the fixed scroll (40). However, according to the present embodiment, the variance of the total deviation D _AS is reduced to the dimension of the fixed scroll (40) by offsetting the dimension deviation D _O of the orbiting scroll (50) with the dimension deviation _DF of the fixed scroll (40). It becomes possible to make it smaller than deviation _DF . Therefore, according to the present embodiment, it becomes possible to reduce the variance of the total deviation D _AS without increasing the processing accuracy of the orbiting scroll (50), the housing (60), and the fixed scroll (40) as compared with the prior art. It is possible to improve the efficiency of the compressor (10).

In addition, the scroll compressor (10) manufactured by the manufacturing method of the present embodiment has a fixed scroll (40) such that the variance of the total deviation D _AS is smaller than the variance of the dimensional deviation D _F of the fixed scroll (40). The dispersion of the dimensional deviation D _F ) is larger than the dispersion of the spacing L _FP of the plurality of positioning holes (44) formed in the fixed scroll (40).

Therefore, by canceling the dimensional deviation D _O of the orbiting scroll (50) with the dimensional deviation _DF of the fixed scroll (40), the “dispersion of the total deviation D _AS ” becomes “the dimensional deviation D _F of the fixed scroll (40)”. It is possible to make it smaller than Therefore, according to the present embodiment, it becomes possible to reduce the variance of the total deviation D _AS without increasing the processing accuracy of the orbiting scroll (50), the housing (60), and the fixed scroll (40) as compared with the prior art. It is possible to improve the efficiency of the compressor (10).

<< Embodiment 4 >>
The scroll compressor (10) of the fourth embodiment and a method of manufacturing the same will be described. Here, differences between the scroll compressor (10) of the present embodiment and the method of manufacturing the same according to the first embodiment will be described.

-Method of manufacturing scroll compressor-
In the method of manufacturing the scroll compressor (10) of the present embodiment, the orbiting scroll processing step is a pre-processing step, and the housing processing step is a post-processing step. The fixed scroll machining process may be performed any time before the process of assembling the compression mechanism (30). In the scroll compressor (10) of the present embodiment, the housing (60) processed in the post-processing step is the first component, and the orbiting scroll (50) processed in the pre-processing step is the second component.

<Rotation scroll machining process>
The orbiting scroll machining process of the present embodiment is the same as the orbiting scroll machining process of the first embodiment. In other words, in the orbiting scroll processing step of the present embodiment, the orbiting side wrap (52) center axis CL _OW and the boss portion (53) processing conditions targeted to match the central axis CL _OB of (i.e., the orbiting scroll ( in the target value of the dimensional deviations D _O 50) was zero processing conditions), the processing is performed of the orbiting side wrap (52) and the boss portion (53).

<Measurement process>
The measuring step, the orbiting scroll processing step processed orbiting scroll in (50), carried out the measurement of the dimensions, dimensional deviations D _O of the orbiting scroll (50) is calculated.

Calculating a dimensional deviations D _O of the orbiting scroll (50) is the same as Embodiment 1. That is, in the measurement process, the position of the center point CP _OW of the turning side wrap (52) and the position of the point CP _OB on the center axis CL _OB of the boss (53) are calculated, and the turning is performed based on those positions. is the dimension deviation of the scroll (50) vector D _O is identified.

Target setting process
In the target setting step, a target value of the dimensional deviation _DH of the housing (60) to be processed in the housing processing step which is a post-processing step is set. Here, the target setting process of the present embodiment will be described with reference to FIG.

FIG. 17 is a view corresponding to FIG. 10 relating to the first embodiment. FIG. 17 shows two-dimensional coordinates with the origin O as the center point CP _OW of the turning wrap (52). In this two-dimensional coordinate, the dimensional deviation of the orbiting scroll (50) obtained in the measurement step is set as a vector D _O = (x _O , y _O ). In this two-dimensional coordinate, the dimensional deviation of the fixed scroll (40) is assumed to be a vector D _F = (x _F , y _F ).

In the target setting step of the present embodiment, the target vector D _H ′, which is the target value of the dimensional deviation D _H of the housing (60), offsets the dimensional deviation D _O of the orbiting scroll (50) calculated in the measuring step. Set to Specifically, in the goal setting step, the target vector D _H ′ = (x _H ′, y _H ′) is set to the inverse vector of the vector D _O (the dimensional deviation of the orbiting scroll (50)). That is, the target vector D _H ′ becomes D _H ′ = (x _H ′, y _H ′) = (− x _O , −y _O ).

<Housing processing process>
The housing processing process of the present embodiment is different from the housing processing process of the first embodiment in processing conditions. In the housing processing step of the present embodiment, processing of the bearing portion (64) and the positioning hole (67) is performed under processing conditions such that the vector _DH which is a dimensional deviation of the housing (60) becomes the target vector D _H '. It will be.

Fixed Scroll Machining Process
The fixed scroll machining process of the present embodiment is the same as the housing machining process of the second embodiment. That is, in the fixed scroll processing step of the present embodiment, the processing condition (that is, the dimension of the fixed scroll (40)) aimed at matching the fixed side central axis CL _FP and the center axis CL _FW of the fixed side wrap (42) The fixed side wrap (42) and the positioning hole (44) are processed under a processing condition in which the target value of the deviation _DF is zero.

−Dimensional deviation of compression mechanism−
Regarding the scroll compressor (10) manufactured by the manufacturing method of the present embodiment, the dimensional deviations of the orbiting scroll (50), the fixed scroll (40), and the housing (60) and the total deviation that is the sum of them are described. Do. The dimensional deviation of the orbiting scroll (50) is the same as that of the first embodiment, and thus the description thereof is omitted. Moreover, since the dimensional deviation of the fixed scroll (40) is the same as that of the second embodiment, the description thereof is omitted.

<Dimensional deviation of housing>
As described above, in the housing processing step, processing of the bearing portion (64) and the positioning hole (67) is performed under processing conditions aiming to make the dimensional deviation of the housing (60) match the target vector D _H '. Is called.

The target vector D _H ′ is set so as to cancel out the dimensional deviation D _O of the orbiting scroll (50). Therefore, the target vector D _H ′ includes a machining error generated in the orbiting scroll machining process. Furthermore, processing errors also occur in the housing processing process. For this reason, the dimensional deviation (vector D _H ) of the housing (60) processed in the housing processing step usually does not coincide with the target vector D _H ′.

The dimensional deviation (vector D _H ) of the housing (60) processed in the housing processing process includes the processing error of the orbiting scroll processing process included in the target vector D _H ′ and the processing error of the housing processing process.

Thus, the variance V _Hx of the x-direction component of the dimensional deviation (vector D _H ) of the housing (60) encompasses the variance V _Ox of the x-direction component of the dimensional deviation (vector D _O ) of the orbiting scroll (50). Specifically, the variance V _Hx is equal to or greater than the variance V _Ox (V _Hx ≧ V _Ox ).

Further, the variance V _Hy of the y-direction component of the dimensional deviation (vector D _H ) of the housing (60) covers the variance V _Oy of the y-direction component of the dimensional deviation (vector D _O ) of the orbiting scroll (50). Specifically, the dispersion V _Hy is equal to or greater than the dispersion V _Oy (V _Hy ≧ V _Oy ).

Further, as in the second embodiment, the housing 60 processed in the housing processing step of the present embodiment is a dispersion V _Hx of the x-direction component of the dimensional deviation (vector D _H ) of the housing 60 and the y-direction component Each of the variances V _Hy is larger than the variance of the distance L _HP between the two positioning holes (67).

<Total deviation>
Total deviation _{D AS} is the sum of the dimensional deviations (vector _{D F)} of the dimensional deviations (vector _{D H)} and the fixed scroll (40) of the dimensional deviations (vector _{D O)} and the housing (60) of the orbiting scroll (50), is the sum of the vector _{D O} and the vector _{D H} and the vector _{D F.} The end point of the combined vector D _AS , which is the sum of the vector D _O , the vector D _H, and the vector D _F , is the end point C of the vector D _F starting from the point B (see FIG. 17).

As shown in FIG. 17, when the dimensional deviation (vector D _H ) of the housing (60) matches the target vector D _H ′, the total deviation D _AS is the dimensional deviation (vector D _F ) of the fixed scroll (40) Will be equal. For this reason, when the dimensional deviation (vector D _H ) of the housing (60) matches the target vector D _H ′, the end point C of the combined vector D _AS is located in the area A _F in FIG. This area _AF is an area where the end point of the vector D _F (the dimensional deviation of the fixed scroll (40)) may exist (ie, an area showing a processing error generated in the fixed scroll processing step). In addition, processing errors also occur in the housing processing step which is a post-processing step. This processing error is region _AH in FIG. Therefore, the end point C of the composite vector D _AS which is the sum of the vector D _O , the vector D _H and the vector D _F is located within the area A _{AS4 of} FIG. 17 (ie, the area including the area A _H and the area A _F ). To do.

In FIG. 17, the region A _AS4 is schematically a perfect circle centered on the origin O. Normally, the actual area A _AS4 is a slightly distorted circle, and the center of the actual area A _AS4 is slightly shifted from the origin O.

As described above, processed housing at housing processing step (60) of the present embodiment, the dispersion of dimensional deviations D _H is, encompasses the dispersion of dimensional deviations D _O of the orbiting scroll (50). Thus, the variance V _ASx of the x-direction component of the total deviation (vector D _AS ) and the variance V _ASy of the y-direction component are the variance V _Hx of the x-direction component of the housing (60) (vector D _H ) and _Less than the variance V _Hy of the y-direction component.

-Effect of Embodiment 4-
In the manufacturing method of the present embodiment, the orbiting scroll processing step is a pre-processing step, and the housing processing step is a post-processing step. And the manufacturing method of this embodiment is the measurement process which measures the dimensional deviation of the turning scroll (50) processed in the pre-processing process after completion | finish of a pre-processing process, and the turning scroll (50) measured in the measurement process. And a target setting step of setting a target value of the dimensional deviation of the housing (60) processed in the post-processing step so that the dimensional deviation of the housing is offset by the dimensional deviation of the housing (60) processed in the post-processing step In the post-processing step, the housing (60) is processed so that the dimensional deviation of the housing (60) becomes the target value set in the target setting step.

According to the manufacturing method of the present embodiment, the processing of the orbiting scroll (50), the housing (60), and the fixed scroll (40) is performed with the same processing accuracy as the conventional method, as in the manufacturing method of the first embodiment. The variance of the total deviation D _AS can be reduced. Therefore, according to the present embodiment, as in the first embodiment, the efficiency of the scroll compressor (10) can be improved while suppressing the increase in the manufacturing cost of the scroll compressor (10).

Further, in the scroll compressor manufactured by the manufacturing method of this embodiment (10), the dispersion of dimensional deviations D _H of the housing (60), comprehensive dispersion of dimensional deviations D _O of the orbiting scroll (50), and The variance of the total deviation D _AS is smaller than the variance of the dimensional deviation D _H of the housing (60).

Conventionally, the variance of the total deviation could not be less than the variance of the dimensional deviation of the housing (60). However, according to the present embodiment, by offsetting the dimensional deviation D _O of the orbiting scroll (50) by the dimensional deviation D _H of the housing (60), the dispersion of the total deviation D _{AS is obtained} as the dimensional deviation D of the housing (60) It is possible to make it smaller than the variance of _H. Therefore, according to the present embodiment, it is possible to reduce the variance of the total deviation D _AS without increasing the processing accuracy of the orbiting scroll (50), the housing (60) and the fixed scroll (40) compared to the prior art. It is possible to improve the efficiency of the compressor (10).

Further, the scroll compressor (10) manufactured by the manufacturing method of the present embodiment is of the housing (60) such that the dispersion of the total deviation D _AS is smaller than the dispersion of the dimensional deviation D _H of the housing (60). The dispersion of the dimensional deviation _DH is larger than the dispersion of the distance L _HP between the plurality of positioning holes (67) formed in the housing (60).

Thus, by offsetting dimensional deviations D _O of the orbiting scroll (50) by dimensional deviations D _H of the housing (60), the dispersion of dimensional deviations D _H for "housing" dispersion of total deviation D _AS "(60) It can be made smaller than Therefore, according to the present embodiment, it is possible to reduce the variance of the total deviation D _AS without increasing the processing accuracy of the orbiting scroll (50), the housing (60) and the fixed scroll (40) compared to the prior art. It is possible to improve the efficiency of the compressor (10).

<< Other Embodiments >>
In the scroll compressor (10) of each of the above embodiments, three or more positioning holes (44, 67) may be formed in each of the fixed scroll (40) and the housing (60). Also in this case, as in the scroll compressor (10) of each of the above-described embodiments, positioning of the same number as the positioning holes (44) of the fixed scroll (40) (or positioning holes (67) of the housing (60)) A pin (35) is provided.

  In the scroll compressor (10) of each of the above embodiments, the positioning holes (44, 67) are formed as positioning structures in the fixed scroll (40) and the housing (60), respectively. It is not limited to the positioning holes (44, 67). For example, a positioning protrusion may be formed on one of the fixed scroll (40) and the housing (60), and a positioning hole may be formed on the other as a positioning mechanism.

  While the embodiments and modifications have been described above, it will be understood that various changes in form and detail can be made without departing from the spirit and scope of the claims. Moreover, the above embodiments and modifications may be combined or replaced as appropriate as long as the function of the subject of the present disclosure is not impaired.

  As discussed above, the present disclosure is useful for scroll fluid machines and methods of making the same.

10 scroll compressor (scroll fluid machine)
25 drive shaft (rotational shaft)
35 Locating pin
40 Fixed scroll
42 Fixed wrap
44 Positioning hole (Positioning structure)
50 orbiting scroll
52 Turning lap
53 Boss
60 Housing
64 Bearing part
67 Positioning hole (Positioning structure)

Claims (11)

A orbiting scroll (50) in which an orbiting side wrap (52) and a boss portion (53) are formed, and a bearing portion that supports a rotating shaft (25) connected to the boss portion (53) of the orbiting scroll (50). A housing (60) formed with (64), and a fixed scroll (40) formed with a fixed side wrap (42) that meshes with the turning side wrap (52) and fixed to the housing (60). A scroll fluid machine,
While each of the fixed scroll (40) and the housing (60) is provided with a plurality of positioning structures (44, 67) for determining the fixed position of the fixed scroll (40) with respect to the housing (60) ,
The deviation of the central axis of the boss portion (53) with respect to the central axis of the orbiting side wrap (52) is taken as the dimensional deviation of the orbiting scroll (50),
The straight line positioned at the shortest equidistant distance from each of the positioning structures (67) of the housing (60) is taken as the housing center axis, and the deviation of the housing center axis relative to the center axis of the bearing portion (64) 60) dimensional deviation,
The straight line located equidistantly from the positioning structures (44) of the fixed scroll (40) is taken as the fixed side central axis, and the deviation of the central axis of the fixed side wrap (42) with respect to the fixed side central axis is said The dimensional deviation of the fixed scroll (40),
The sum of the dimensional deviation of the orbiting scroll (50), the dimensional deviation of the housing (60), and the dimensional deviation of the fixed scroll (40) is defined as a total deviation. The orbiting scroll (50), the fixed scroll (40), and the housing When one of (60) is a first part and at least one of the remaining two is a second part,
A scroll fluid machine characterized in that the variance of the dimensional deviation of the first part encompasses the variance of the dimensional deviation of the second part, and the variance of the total deviation is smaller than the variance of the dimensional deviation of the first part. . In claim 1,
One of the fixed scroll (40) and the housing (60) is the first part,
A scroll fluid machine, wherein the orbiting scroll (50) is the second part. In claim 1,
The fixed scroll (40) is the first part,
The scroll fluid machine, wherein the orbiting scroll (50) and the housing (60) are the second parts. In claim 1,
The housing (60) is the first part;
The scroll fluid machine, wherein the orbiting scroll (50) and the fixed scroll (40) are the second parts. A orbiting scroll (50) in which an orbiting side wrap (52) and a boss portion (53) are formed, and a bearing portion that supports a rotating shaft (25) connected to the boss portion (53) of the orbiting scroll (50). A housing (60) formed with (64), and a fixed scroll (40) formed with a fixed side wrap (42) that meshes with the turning side wrap (52) and fixed to the housing (60). A scroll fluid machine,
While each of the fixed scroll (40) and the housing (60) is provided with a plurality of positioning structures (44, 67) for determining the fixed position of the fixed scroll (40) with respect to the housing (60) ,
The deviation of the central axis of the boss portion (53) with respect to the central axis of the orbiting side wrap (52) is taken as the dimensional deviation of the orbiting scroll (50),
The straight line positioned at the shortest equidistant distance from each of the positioning structures (67) of the housing (60) is taken as the housing center axis, and the deviation of the housing center axis relative to the center axis of the bearing portion (64) 60) dimensional deviation,
The straight line located equidistantly from the positioning structures (44) of the fixed scroll (40) is taken as the fixed side central axis, and the deviation of the central axis of the fixed side wrap (42) with respect to the fixed side central axis is said The dimensional deviation of the fixed scroll (40),
When the sum of the dimensional deviation of the orbiting scroll (50), the dimensional deviation of the housing (60), and the dimensional deviation of the fixed scroll (40) is a total deviation:
Dispersion of the dimensional deviation of the fixed scroll (40) is formed in the fixed scroll (40) such that the dispersion of the total deviation is smaller than the dispersion of the dimensional deviation of the fixed scroll (40) A scroll fluid machine characterized by being larger than the dispersion of the distance between the positioning structures (44). A orbiting scroll (50) in which an orbiting side wrap (52) and a boss portion (53) are formed, and a bearing portion that supports a rotating shaft (25) connected to the boss portion (53) of the orbiting scroll (50). A housing (60) formed with (64), and a fixed scroll (40) formed with a fixed side wrap (42) that meshes with the turning side wrap (52) and fixed to the housing (60). A scroll fluid machine,
While each of the fixed scroll (40) and the housing (60) is provided with a plurality of positioning structures (44, 67) for determining the fixed position of the fixed scroll (40) with respect to the housing (60) ,
The deviation of the central axis of the boss portion (53) with respect to the central axis of the orbiting side wrap (52) is taken as the dimensional deviation of the orbiting scroll (50),
The straight line positioned at the shortest equidistant distance from each of the positioning structures (67) of the housing (60) is taken as the housing center axis, and the deviation of the housing center axis relative to the center axis of the bearing portion (64) 60) dimensional deviation,
The straight line located equidistantly from the positioning structures (44) of the fixed scroll (40) is taken as the fixed side central axis, and the deviation of the central axis of the fixed side wrap (42) with respect to the fixed side central axis is said The dimensional deviation of the fixed scroll (40),
When the sum of the dimensional deviation of the orbiting scroll (50), the dimensional deviation of the housing (60), and the dimensional deviation of the fixed scroll (40) is a total deviation:
Dispersion of the dimensional deviation of the housing (60) is formed on the housing (60) so that the dispersion of the total deviation is smaller than the dispersion of the dimensional deviation of the housing (60) 67) A scroll fluid machine characterized by being larger than the dispersion of the distance between them. A orbiting scroll (50) in which an orbiting side wrap (52) and a boss portion (53) are formed, and a bearing portion that supports a rotating shaft (25) connected to the boss portion (53) of the orbiting scroll (50). A housing (60) in which (64) is formed, and a fixed scroll (40) in which a fixed side wrap (42) meshing with the turning side wrap (52) is formed and fixed to the housing (60), A scroll fluid in which a plurality of positioning structures (44, 67) for forming a fixed position of the fixed scroll (40) with respect to the housing (60) are formed on each of the fixed scroll (40) and the housing (60). A method of manufacturing a machine,
An orbiting scroll machining step for machining the orbiting side wrap (52) and the boss portion (53) of the orbiting scroll (50) that is a workpiece;
A fixed scroll processing step of processing the fixed side wrap (42) and the positioning structure (44) of the fixed scroll (40) which is a workpiece;
A housing processing step of processing the bearing portion (64) and the positioning structure (67) of the housing (60), which is a workpiece,
The deviation of the central axis of the boss portion (53) with respect to the central axis of the orbiting side wrap (52) is taken as the dimensional deviation of the orbiting scroll (50),
The straight line positioned at the shortest equidistant distance from each of the positioning structures (67) of the housing (60) is taken as the housing center axis, and the deviation of the housing center axis relative to the center axis of the bearing portion (64) 60) dimensional deviation,
The straight line located equidistantly from the positioning structures (44) of the fixed scroll (40) is taken as the fixed side central axis, and the deviation of the central axis of the fixed side wrap (42) with respect to the fixed side central axis is said The dimensional deviation of the fixed scroll (40),
A pre-processing step performed before one of the remaining two as the post-processing step, wherein one of the orbiting scroll processing step, the fixed scroll processing step, and the housing processing step is a post-processing step; When
After the end of the pre-processing step, a measurement step for measuring a dimensional deviation of the workpiece processed in the pre-processing step,
The dimensions of the workpiece to be machined in the post-processing step such that the dimensional deviation of the workpiece to be measured measured in the measuring step is offset by the dimensional deviation of the workpiece to be machined in the post-processing step Further comprising a target setting step of setting a target value of deviation;
A manufacturing method of a scroll fluid machine characterized by processing processing parts in the above-mentioned post-processing process so that dimensional deviation of a processing parts will become a target value set up in the above-mentioned target setting process. In claim 7,
The orbiting scroll processing step is the pre-processing step,
The fixed scroll processing step is the post-processing step,
In the measuring step, the dimensional deviation of the orbiting scroll (50) processed in the orbiting scroll processing step is measured,
In the target setting step, the dimension deviation of the fixed scroll (40) is offset so that the dimension deviation of the orbiting scroll (50) measured in the measurement step is offset by the dimension deviation of the fixed scroll (40). Set the target value,
In the fixed scroll processing step, the fixed side wrap (42) and the positioning structure of the fixed scroll (40) are set such that the dimensional deviation of the fixed scroll (40) becomes the target value set in the target setting step. 44) A manufacturing method of a scroll fluid machine characterized by processing. In claim 7,
The orbiting scroll processing step is the pre-processing step,
The housing processing step is the post-processing step,
In the measuring step, the dimensional deviation of the orbiting scroll (50) processed in the orbiting scroll processing step is measured,
In the target setting step, a target value of the dimensional deviation of the housing (60) such that the dimensional deviation of the orbiting scroll (50) measured in the measuring step is offset by the dimensional deviation of the housing (60). Set
In the housing processing step, the bearing portion (64) and the positioning structure (67) of the housing (60) are set so that the dimensional deviation of the housing (60) becomes the target value set in the target setting step. A manufacturing method of a scroll fluid machine characterized by processing. In claim 7,
The orbiting scroll processing step and the housing processing step are the pre-processing steps,
The fixed scroll processing step is the post-processing step,
In the measurement step, the dimensional deviation of the orbiting scroll (50) processed in the orbiting scroll processing step and the dimensional deviation of the housing (60) processed in the housing processing step are measured.
In the target setting step, the dimensional deviation of the orbiting scroll (50) and the dimensional deviation of the housing (60) measured in the measuring step are offset by the dimensional deviation of the fixed scroll (40). Set the target value for the dimension deviation of the fixed scroll (40)
In the fixed scroll processing step, the fixed side wrap (42) and the positioning structure (40) of the fixed scroll (40) so that the dimensional deviation of the fixed scroll (40) becomes the target value set in the target setting step. 44). A method for manufacturing a scroll fluid machine. In claim 7,
The orbiting scroll processing step and the fixed scroll processing step are the pre-processing steps,
The housing processing step is the post-processing step,
In the measurement step, the dimensional deviation of the orbiting scroll (50) processed in the orbiting scroll processing step and the dimensional deviation of the fixed scroll (40) processed in the fixed scroll processing step are measured,
In the target setting step, the dimensional deviation of the orbiting scroll (50) and the dimensional deviation of the fixed scroll (40) measured in the measuring step are offset by the dimensional deviation of the housing (60). Set the target value of the dimensional deviation of the above housing (60),
In the housing processing step, the bearing portion (64) and the positioning structure (67) of the housing (60) are set so that the dimensional deviation of the housing (60) becomes the target value set in the target setting step. A manufacturing method of a scroll fluid machine characterized by processing.

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