JP2019065720A - Fluid machine - Google Patents

Abstract

To easily identify thickness of an adjustment shim and to suppress reduction in corrosion resistance of a housing therewith in a fluid machine in which the adjustment shim is disposed between two housing members constituting the housing.SOLUTION: In a scroll fluid machine 1, at least one adjustment shim 10 is disposed between a front housing 2 and a center plate 3 which constitute a housing, and adjusts a position of the center plate 3 with respect to the front housing 2. The adjustment shim is formed annularly and includes, on an inner peripheral surface, an identification part 14 for identifying thickness of the adjustment shim.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a fluid machine such as a compressor and an expander, and more particularly to a housing structure of the fluid machine.

  The compressor described in patent document 1 is known as an example of the conventional fluid machine. The compressor described in Patent Document 1 is composed of at least two divided metal members, and the metal members are mutually joined to form a space inside, and the material of the housing is sacrificed. It has a surface provided with an anticorrosion effect, and is provided with a height adjustment member disposed at a joint portion of the metal members joined to each other, and a compression mechanism portion housed inside the housing.

JP, 2012-215126, A

  By the way, as the adjusting member such as the height adjusting member, one having an appropriate thickness from among a plurality of adjusting members having different thicknesses is appropriately selected and / or combined when manufacturing the compressor, etc. Often used.

  However, since the adjusting member is mainly used to make a minute adjustment, it is difficult to identify at a glance the thickness of each of a plurality of adjusting members having different thicknesses. Although it is possible to provide an identification part for thickness identification in each adjustment member as a countermeasure, if the identification part is provided carelessly, there is a possibility that corrosion resistance of the housing may be lowered.

  Therefore, the present invention makes it possible to easily identify the thickness of the adjustment shim in a fluid machine in which the adjustment shim is disposed between two housing members constituting the housing, and the corrosion resistance of the housing is reduced accordingly. To reduce

  According to one aspect of the present invention, the fluid machine is disposed between the first housing member and the second housing member constituting the housing, and between the first housing member and the second housing member, and the thickness of the fluid machine is different. At least one adjustment shim for adjusting the position of the second housing member with respect to the first housing member, and a compression mechanism or an expansion mechanism housed in the housing. The at least one adjustment shim is annularly shaped and has an identification portion on its inner circumferential surface for identifying its thickness.

  According to the fluid machine, since the adjusting shim is formed in an annular shape and has the identification portion on the inner circumferential surface, the thickness of the adjusting shim can be easily identified, and The function as the seal member (for example, the function of preventing intrusion of salt water and the like) is not impaired, and the decrease in the corrosion resistance of the housing is also suppressed.

FIG. 1 is a perspective view of a scroll fluid machine that is an embodiment of a fluid machine to which the present invention is applied. It is an exploded perspective view of the scroll fluid machine. FIG. 5 is a plan view of an adjustment shim used in the scroll fluid machine. It is a figure which shows the 1st modification of the said adjustment shim. It is a figure which shows the 2nd modification of the said adjustment shim. It is a figure which shows the 3rd modification of the said adjustment shim. It is a figure which shows the 4th modification of the said adjustment shim. It is a figure which shows the 5th modification of the said adjustment shim.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Here, the case where the fluid machine is a scroll fluid machine (scroll compressor or scroll expander) will be described. However, the present invention can be widely applied to fluid machines other than scroll fluid machines.

  FIG. 1 is a perspective view of a scroll fluid machine 1 which is an embodiment of a fluid machine to which the present invention is applied, and FIG. 2 is an exploded perspective view of the scroll fluid machine 1.

  The scroll fluid machine 1 according to the embodiment can be configured as a compressor (scroll compressor) or an expander (scroll expander). When the scroll fluid machine 1 is configured as a compressor, for example, the scroll fluid machine 1 is incorporated in a refrigerant circuit of a vehicle air conditioner, and compresses and discharges the refrigerant sucked from the low pressure side of the refrigerant circuit. It can be configured. When the scroll fluid machine 1 is configured as an expander, the scroll fluid machine 1 is incorporated into, for example, a refrigerant circuit of a Rankine cycle device for a vehicle, and expands the refrigerant introduced from the refrigerant circuit to generate power. It may be configured to recover power from the refrigerant.

  As shown in FIGS. 1 and 2, the scroll fluid machine 1 has a front housing 2, a center plate 3 and a rear housing 4. The front housing 2, the center plate 3 and the rear housing 4 are formed of a metal material such as an aluminum alloy. Then, the front housing 2, the center plate 3 and the rear housing 4 are fastened by a plurality of (in this case, six) bolts 5 to constitute a housing of the scroll fluid machine 1.

  In the present embodiment, a plurality of (here, two) positioning pins 21 are press-fitted to the end surface of the front housing 2 on the center plate 3 side. A plurality of (here, two) pin holes 31 corresponding to the plurality of positioning pins 21 are formed in the center plate 3, and the rear housing 4 is a recess (shown in the drawing) capable of accommodating the tip of each positioning pin 21. Is omitted. Thereby, at least the center plate 3 is positioned with respect to the front housing 2. A pin hole corresponding to the positioning pin 21 may be formed in the rear housing 4 in place of the recess. Here, the positioning pin 21 and the pin hole 31 do not have to be positioned precisely between the front housing 2 and the center plate 3, and compared with the case of only a plurality of bolts 5, the front housing 2 and the center plate 3 It may be set to suppress positional deviation. Further, a plurality of positioning pins may be provided on the surface of the center plate 3 on the front housing 2 side, and a plurality of pin holes corresponding to the plurality of positioning pins may be formed on the end surface of the front housing 2 on the center plate 3 side.

  A fixed scroll 6 is integrally formed on the surface of the center plate 3 on the front housing 2 side. Therefore, it is also possible to call the center plate 3 a fixed scroll 6. The fixed scroll 6 has a disk-shaped substrate 61 whose one surface is fixed to the center plate 3 and a spiral part 62 formed to project from the other surface of the substrate 61. The fixed scroll 6 is accommodated in the front housing 2 by fitting the outer peripheral surface of the substrate 61 to the inner peripheral surface of the front housing 2.

  A movable scroll 7 is accommodated in the front housing 2. The movable scroll 7 is disposed to face the fixed scroll 6. The movable scroll 7 has a disk-like substrate (not shown) and a spiral portion 72 engaged with the spiral portion 62 of the fixed scroll 6 and is configured to perform a pivoting motion with respect to the fixed scroll 6 There is. Further, the movable scroll 7 is connected to a rotating main shaft (not shown) via a conversion mechanism (not shown). The conversion mechanism is a mechanism capable of mutually converting the pivoting motion of the movable scroll 7 and the rotational motion of the rotating main shaft.

  When the scroll fluid machine 1 is configured as a compressor, the rotation main shaft is rotationally driven by an external device, and the rotation of the rotation main shaft is transmitted to the movable scroll 7 via the conversion mechanism. As a result, the movable scroll 7 pivots relative to the fixed scroll 6. When the movable scroll 7 pivots, refrigerant from the outside is drawn into the compression chamber formed between the spiral portion 62 of the fixed scroll 6 and the spiral portion 72 of the movable scroll 7, and the compression chamber reduces its volume. By moving while moving, the refrigerant drawn into the compression chamber is compressed. Then, the compressed refrigerant is discharged from the scroll fluid machine 1. In this case, the fixed scroll 6 and the movable scroll 7 constitute a compression mechanism.

  When the scroll fluid machine 1 is configured as an expander, a refrigerant from the outside is introduced into an expansion chamber formed between the spiral portion 62 of the fixed scroll 6 and the spiral portion 72 of the movable scroll 7, and the expansion chamber is The refrigerant introduced into the expansion chamber expands in the expansion chamber. As a result, the movable scroll 7 pivots relative to the fixed scroll 6. Then, the pivoting motion of the movable scroll 7 is transmitted to the rotating spindle through the conversion mechanism to rotate the rotating spindle, and the rotation of the rotating spindle is transmitted to an external device. Further, the refrigerant after expansion is discharged from the scroll fluid machine 1. In this case, the fixed scroll 6 and the movable scroll 7 constitute an expansion mechanism.

  In the present embodiment, at least one (here, three) adjustment shims 10 made of a metal plate such as a cold-rolled steel plate (SPCC) are disposed between the front housing 2 and the center plate 3. The at least one adjusting shim 10 is mainly used to adjust the position of the center plate 3 with respect to the front housing 2 (position in the axial direction (longitudinal direction) of the scroll fluid machine 1). In particular, in the present embodiment, at least one adjustment shim 10 is a gap between the fixed scroll 6 and the movable scroll 7, specifically, a gap between the tip of the spiral portion 62 of the fixed scroll 6 and the substrate of the movable scroll 7. Also, it is used to adjust the gap between the tip of the spiral portion 72 of the movable scroll 7 and the substrate 61 of the fixed scroll 6.

  FIG. 3 is a plan view of the adjustment shim 10. As shown in FIG. 3, the adjustment shim 10 is formed in an annular shape. Specifically, the adjustment shim 10 has an outer shape substantially the same as the outer shape of the front housing 2 and the center plate 3 (that is, the outer shape of the housing of the scroll fluid machine 1). It is formed to have an inner hole 11 of substantially the same diameter.

  The adjustment shim 10 has a plurality of (here, six) bolt insertion holes 12 through which any of the plurality (here, six) bolts 5 are inserted and positioning of a plurality (here, two) in each A plurality of (here, two) pin holes 13 through which any one of the pins 21 is inserted are formed. Accordingly, the adjustment shim 10 can be fixed in a positioned state with respect to the front housing 2. The positioning pin 21 and the pin hole 13 are different from the positional deviation between the front housing 2 and the adjustment shim 10 in the state in which the plurality of bolts 5 are inserted into the plurality of bolt insertion holes 12, the front housing 2 and the adjustment shim It may be set so as to be able to suppress misregistration with 10.

  Further, an identification portion 14 for identifying the thickness of the adjustment shim 10 is formed on the inner peripheral surface of the adjustment shim 10 (the inner surface of the inner hole 11). In the present embodiment, the identification unit 14 is configured by at least one recess in which the inner circumferential surface of the adjustment shim 10 is partially recessed, so that the number of recesses varies according to the thickness of the adjustment shim 10 It is set.

  In the present embodiment, at least one adjustment shim 10 also has a function as a sealing member that seals the joint between the front housing 2 and the center plate 3. Therefore, it is also possible to call adjustment shim 10 a seal member. Although not shown, seal members such as gaskets are also disposed between the center plate 3 and the rear housing 4. Of course, the adjustment shim 10 may be used as a seal member for sealing the joint between the center plate 3 and the rear housing 4.

  By the way, although one or more adjustment shims 10 are selected from a plurality of adjustment shims having different thicknesses when the scroll fluid machine 1 is manufactured, as described above, a plurality of adjustment shims 10 having different thicknesses may be used. At a glance it is difficult to identify the thickness of each of the adjusting shims. In this respect, in the present embodiment, the adjustment shim 10 has an identification unit 14 for identifying the thickness. Therefore, the thickness of the adjusting shim 10 can be easily identified at a glance, and the working efficiency at the time of manufacturing the scroll fluid machine 1 is improved.

  In particular, in the present embodiment, the adjustment shim 10 is formed in an annular shape, and the identification portion 14 is formed on the inner circumferential surface of the adjustment shim 10 (the inner surface of the inner hole 11). For this reason, the identification portion 14 does not impair the function of the adjustment shim 10 as a seal member, particularly the function of preventing intrusion of salt water and the like, and the corrosion resistance of the front housing 2 and the center plate 3 is prevented from being degraded. In addition, the identification unit 14 is configured by at least one concave portion in which the inner circumferential surface (the inner surface of the inner hole 11) of the adjustment shim 10 is partially recessed. Therefore, the identification unit 14 does not protrude into the inner space of the front housing 2 and interfere with other components.

  In addition, when positional deviation occurs between at least one of the front housing 2 and the center plate 3 and the adjustment shim 10, a region where salt water etc. accumulates is locally formed at the junction between the front housing 2 and the center plate 3 This causes the corrosion of the center plate 3 and the center plate 3 to increase. In this respect, in the present embodiment, the adjustment shim 10 is formed with a plurality of pin holes 13 into which any one of the plurality of positioning pins 21 for positioning the front housing 2 and the center plate 3 is inserted. The positional deviation of the adjustment shim 10 with respect to the front housing 2 and the center plate 3 is suppressed. For this reason, it is suppressed that the field which salt water etc. accumulate in a joined part of front housing 2 and center plate 3, and corrosion of a joined part of front housing 2 and center plate 3 is also controlled.

  As described above, according to the present embodiment, the thickness of the adjustment shim 10 can be easily identified by the identification unit 14, and the corrosion resistance of the front housing 2 and the center plate 3 is reduced due to the provision of the identification unit 14. Can also be suppressed.

  Hereinafter, the modification of adjustment shim 10 is explained.

  FIG. 4 shows a first modification of the adjusting shim 10. The outer shape of the adjusting shim 10 according to the first modification is formed to be larger over the entire circumference than the outer shape (shown by a broken line) of the front housing 2 and the center plate 3. That is, in the first modification, the outer edge portion of the adjustment shim 10 is formed to protrude outside the housing of the scroll fluid machine 1. Other than that, it is the same as adjustment shim 10 concerning the above-mentioned embodiment. In this case, since a region in which saltwater or the like is collected is not formed at the joint between the front housing 2 and the center plate 3, corrosion of the joint between the front housing 2 and the center plate 3 can be further suppressed.

  FIG. 5 shows a second modification of the adjustment shim 10. The adjustment shim 10 according to the second modification is obtained by applying an anticorrosion treatment to the adjustment shim 10 according to the first modification. For example, an anticorrosion treatment can be performed by forming an oxide film on the surface of the adjustment shim 10 according to the first modification. In this way, not only the adjustment shim 10 but also the end face of the front housing 2 contacting the surface of the adjustment shim 10 and the end face of the center plate 3 are protected, so the joint between the front housing 2 and the center plate 3 Corrosion is further suppressed. Here, the anticorrosion treatment does not necessarily have to be applied to the entire adjustment shim 10 according to the first modification. For example, when a plurality of adjustment shims 10 are used, antirust treatment may be applied to only one side of some of the adjustment shims 10.

  FIG. 6 shows a third modification of the adjusting shim 10. In the adjustment shim 10 according to the third modification, a portion (outside area of the broken line) of the portion of the adjustment shim 10 according to the first modification protruding outside the housing of the scroll fluid machine 1 is subjected to sacrificial corrosion resistance treatment is there. For example, in the region outside the external shape (broken line) of the front housing 2 and the center plate 3 in the adjustment shim 10 according to the first modification, the ionization shim 10 is more ionized than the material (SPCC) of the adjustment shim 10 and the material (aluminum alloy) of the housing A sacrificial anticorrosive treatment can be applied by coating a highly likely metal (eg, zinc) by plating or the like. In this way, the corrosion of the joint between the front housing 2 and the center plate 3 is further suppressed by the sacrificial corrosion of the coating portion.

  FIGS. 7A and 7B show a fourth modification of the adjusting shim 10. When three or more adjusting shims 10 are disposed between the front housing 2 and the center plate 3, the outer shape of the adjusting shim 10 positioned in the middle is formed larger than the outer shape of the other adjusting shims 10, and The portion of the adjustment shim 10 located on the outside of the housing of the scroll fluid machine 1 may be subjected to a sacrificial protection treatment. For example, when the first adjustment shim 10a on the front housing 2 side, the second adjustment shim 10b on the center plate 3 side, and the third adjustment shim 10c between them are disposed between the front housing 2 and the center plate 3 The third adjustment shim 10c has an outer diameter larger than that of the first adjustment shim 10a and the second adjustment shim 10b, and the sacrificial corrosion treatment is applied to a portion of the third adjustment shim 10c that protrudes outside the housing of the scroll fluid machine 1. Will be applied. In this case, the sacrificial anti-corrosion treatment is applied to a region (peripheral region in this case) of the portion of the third adjustment shim 10 c protruding outside the housing of the scroll fluid machine 1 and not in contact with the outer peripheral surface of the housing. It may be done (FIG. 7 (B)). Even in this manner, corrosion of the joint between the front housing 2 and the center plate 3 is suppressed.

  FIG. 8 is a main part view showing a fifth modified example of the adjusting shim 10. As shown in FIG. As shown in FIG. 8, one or more (here, three) first modification example adjustment shims 10 are disposed between the front housing 2 and the center plate 3 to form the front housing 2 and the center plate 3. And, after the rear housing 4 is fastened, the junction between the front housing 2 and the center plate 3 may be subjected to water repellent treatment from the outside. In this case, as a result, the portion of the adjustment shim 10 which protrudes to the outside of the housing of the scroll fluid machine 1 is subjected to the water repelling treatment. Here, although the outer shape of the third adjusting shim 10c positioned in the middle is formed larger than the outer shapes of the first adjusting shim 10a and the second adjusting shim 10b, the first adjusting shim 10a and the second adjusting shim 10b are formed. The outer shape of the third adjustment shim 10c may be formed to have substantially the same size. This prevents the entry of salt water or the like into the joint between the front housing 2 and the center plate 3, thereby further suppressing corrosion of the joint between the front housing 2 and the center plate 3.

  As mentioned above, although the preferable embodiment and modification of the present invention were described, the present invention is not limited to the above-mentioned embodiment and modification, and the further modification etc. are possible based on the technical idea of the present invention Of course there is one thing.

  DESCRIPTION OF SYMBOLS 1 ... scroll fluid machine, 2 ... front housing, 3 ... center plate, 4 ... rear housing, 6 ... fixed scroll, 7 ... movable scroll, 10 ... adjustment shim, 11 ... inner hole, 12 ... bolt insertion hole, 13 ... pin Hole, 14 ... identification part

Claims (8)

A first housing member and a second housing member constituting a housing, and a position of the second housing member with respect to the first housing member depending on a thickness thereof disposed between the first housing member and the second housing member A fluid machine including at least one adjusting shim for adjusting the pressure, and a compression mechanism or an expansion mechanism housed in the housing,
The at least one adjustment shim is annularly shaped and has an identification portion on its inner circumferential surface for identifying its thickness,
Fluid machinery.   The fluid machine according to claim 1, wherein the identification unit is configured by at least one recess in which the inner circumferential surface is partially recessed. The at least one adjusting shim is
A plurality of bolt insertion holes into which any of a plurality of bolts for fastening the first housing member and the second housing member are inserted respectively;
A plurality of pin holes into which any one of a plurality of positioning pins provided in the first housing member or the second housing member is inserted;
Have
A fluid machine according to claim 1 or 2.   A fluid machine according to any one of the preceding claims, wherein the at least one adjustment shim is formed such that its outer edge protrudes outside the housing.   The fluid machine according to claim 4, wherein all or a part of the at least one adjustment shim is subjected to an anticorrosion treatment.   The fluid machine according to claim 4, wherein a portion of the at least one adjustment shim that protrudes outside the housing is subjected to a sacrificial corrosion prevention treatment or a water repelling treatment.   The at least one adjustment shim is disposed between the first adjustment shim on the first housing member side, the second adjustment shim on the second housing member side, the first adjustment shim and the second adjustment shim A third adjustment shim having an outer shape larger than the first adjustment shim and the second adjustment shim, and a portion of the third adjustment shim protruding outside the housing is subjected to a sacrificial anticorrosion treatment The fluid machine according to any one of claims 1 to 6. In the housing, a compression mechanism or an expansion mechanism including a fixed scroll fixed to the first housing member or the second housing member and a movable scroll performing a pivoting motion with respect to the fixed scroll is accommodated.
The at least one adjustment shim is configured to adjust a gap between the fixed scroll and the movable scroll.
The fluid machine according to any one of claims 1 to 7.