JP2008291655A - Gas compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas compressor having an oil separator which is manufactured in a simpler manufacturing process. <P>SOLUTION: A body part of a cyclone block 70 (the oil separator) is not provided with a so-called bottom wall part. On the other hand, a rib 11c for enhancing strength is formed in an end surface 11b (an inner wall surface) of a case 11 (a housing) for accommodating the cyclone block 70. In the state where the cyclone block 70 is accommodated inside the case 11, the rib 11c formed on the end surface 11b of the case 11 is arranged in a part equivalent to the bottom wall part of the body part 71. As a result, a simple manufacturing process is provided by including no bottom wall part as a cyclone block 70 single unit before assembly and integrally molding the body part 71 and inner cylinder part 72 while exhibiting a function of the cyclone block 70 as a compressor 100 (a gas compressor). <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a gas compressor, and more particularly to an improvement in an oil separator that centrifuges oil from compressed gas discharged from a compressor body.

  Conventionally, a gas compressor (compressor) for compressing a gas such as a refrigerant gas and circulating the gas through the air conditioning system is used in an air conditioning system (hereinafter referred to as an air conditioning system).

  Here, a general compressor includes a compressor body that compresses and discharges gas, an oil separator that separates oil from the compressed gas discharged from the compressor body, and an oil separator and a compressor body inside. It is the structure provided with the housing accommodated in.

  As the oil separator, for example, a substantially cylindrical main body portion whose one end is closed by an end wall portion, and a substantially cylindrical inner cylinder portion which is substantially concentric with the main body portion and provided inside the main body portion, And forming a swirling flow of compressed gas between the inner peripheral surface of the main body portion and the outer peripheral surface of the inner cylinder portion to centrifuge the oil component, and to end the compressed gas after the oil component is separated from the end wall It is known that it is formed so as to be reflected by the part, led to the inner space of the inner cylinder part, and exhausted from the oil separator (Patent Document 1).

  Here, as for the oil separator shown by the said patent document 1, the main-body part and the end wall part are integrally molded by die-casting, On the other hand, an inner cylinder part is by the pipe member separate from a main-body part. In the process before the oil separator is attached to the compressor body, the pipe member is expanded in diameter and then press-fitted into the body part, and the body part is crimped to The inner cylinder part is firmly fixed to the body (Patent Document 1).

  However, in order to perform the press-fitting described above, it is necessary to accurately manage the inner diameter of the hole in the main body and the outer diameter of the enlarged diameter portion of the inner cylinder (pipe). It is also necessary to manage the surface roughness of the surface to be press-fitted. Furthermore, it is necessary to increase the thickness of the main body in order to ensure the strength against the press-fitting load. Moreover, the process of performing a caulking process and a bolt fastening is also required.

  Thus, although the oil separator has a relatively simple structure, it is difficult to reduce the manufacturing cost due to the above-described problems in the process.

In view of this, an apparatus in which the main body and the inner cylinder are integrally formed has been proposed (Patent Document 2).
JP 2000-170681 A JP 2002-250228 A

  The oil separator disclosed in Patent Document 2 described above exhibits the effect of reducing the manufacturing cost described above because the main body portion and the inner cylinder portion are integrated, but the bottom wall portion is still screwed in. Therefore, further cost reduction is desired.

  This invention is made | formed in view of the said situation, and it aims at providing the gas compressor which has an oil separator which can be manufactured with a simpler manufacturing process.

  In the gas compressor according to the present invention, the main body portion of the oil separator alone accommodated in the housing is not provided with a so-called bottom wall portion, while the inner wall surface of the housing in which the oil separator is accommodated is not provided. In the state in which the rib for improving the strength is formed and the oil separator is housed in the housing, the rib formed on the inner wall surface of the housing is arranged in a portion corresponding to the bottom wall portion of the main body portion. As a result, while the oil separator functions as a gas compressor, the oil separator before assembly does not have a bottom wall, and the main body and the inner cylinder are integrally formed. Therefore, a simple manufacturing process can be realized.

  That is, the gas compressor according to the present invention includes a compressor body, an oil separator that separates oil from the compressed gas discharged from the compressor body, and the oil separator inserted in a specific direction to separate the oil. The oil separator includes a substantially cylindrical main body portion, and a substantially cylindrical inner cylinder portion that is substantially concentric with the main body portion and provided inside the main body portion. Are formed integrally by die-casting, and the swirling flow of the compressed gas is formed between the inner peripheral surface of the main body portion and the outer peripheral surface of the inner cylinder portion, and the oil component is centrifuged. The housing has a flat rib extending in an opposite direction to the specific direction from an end wall of the housing, and the rib is in a state in which the oil separator is accommodated in the housing. In the inner cylinder part of the openings at both ends of the main body part The provided side, characterized in that it is formed in a position for closing the opening on the opposite side.

  According to the gas compressor according to the present invention configured as described above, the oil separator includes a substantially cylindrical main body part, a substantially cylindrical body that is substantially concentric with the main body part and provided inside the main body part. Since the inner cylinder part is integrally formed by die casting, the process of press-fitting the inner cylinder part into the main body part (including incidental processing such as machining) and caulking can be omitted as in the prior art. . On the other hand, although the mold for die-casting the one in which the inner cylinder portion and the main body portion are integrated is complicated, the bottom wall portion in the conventional main body portion is not provided, so conventionally the bottom wall portion Since the closed portion is open, the mold can be extracted in this opening direction, and the extending direction of the inner cylinder portion coincides with this extraction direction. It is possible to realize a mold having a simpler structure than a mold for manufacturing a main body portion of a conventional oil separator.

  And since the part corresponding to the bottom wall part in the main body part is not formed in the oil separator itself as described above, the formation of the main body part and the inner cylinder part by the mold can be facilitated, On the other hand, the part corresponding to the bottom wall part is constructed by extending the ribs that have been formed in the past to prevent the oil from being rolled up and to improve the strength, thereby substantially avoiding an increase in parts and processing. can do.

  Therefore, according to the gas compressor concerning the present invention, an oil separator can be manufactured by a simpler manufacturing process.

  In the gas compressor according to the present invention, it is preferable that the rib extends to a part of the periphery of the peripheral wall of the main body portion in a state where the oil separator is housed in the housing.

  The oil component separated by the oil separator is stored in the space outside the peripheral wall of the main body of the oil separator, but the stored oil component is easily rolled up by the oil component discharged from the oil separator. The oil component that has been wound up is easily transported to the gas after the oil component has been separated by the oil separator and easily discharged to the outside of the gas compressor.

  However, according to the gas compressor having a preferable configuration, the rib of the housing extending to a part of the periphery of the peripheral wall of the main body of the oil separator covers the liquid level of the stored oil, so that it is discharged from the oil separator. Even if the collected oil collides with the liquid level of the stored oil and the oil is splashed, the splashed oil is prevented from colliding with the ribs and being rolled up, and the oil is excessively discharged from the gas compressor. Can be prevented.

  Further, in the gas compressor according to the present invention, a notch for accepting the penetration of the rib is formed in a part of the peripheral wall of the main body, and the rib penetrates the notch and is inside the main body. It is preferable to be positioned so as to close the opening by being inserted.

  In this preferred configuration, there is a gap between the notch and the rib in a state where the rib is received in the notch formed in the peripheral wall (the rib constituting the bottom wall portion of the oil separator). Shall not occur.

  Since the oil separator is fixed to the compressor body, according to the gas compressor having a preferred configuration, in the state where the rib is received in the notch formed in the peripheral wall of the body portion of the oil separator, the oil separator is When the rib of the housing is received in the cut, the oil separator is also supported by the rib, which means that the compressor body is supported by the housing via the oil separator, By increasing the support part of the compressor body by the housing, it is possible to suppress relative vibration of the compressor body with respect to the housing.

  In the gas compressor according to the present invention, in the rib corresponding to the bottom wall portion, it is necessary to form an oil drain hole for discharging the oil component separated by the oil separator. An oil drainage hole can be opened in the rib by inserting a drill or the like through a gas discharge port (discharge port) formed close to the hole and drilling the rib with this drill.

  According to the gas compressor concerning the present invention, an oil separator can be manufactured by a simpler manufacturing process.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, the best embodiment of the gas compressor of the invention will be described with reference to the drawings.

  FIG. 1 is a longitudinal sectional view showing a vane rotary compressor 100 which is an embodiment of a gas compressor according to the present invention.

  The illustrated compressor 100 is configured, for example, as a part of an air conditioning system (hereinafter simply referred to as an air conditioning system) that performs cooling using the heat of vaporization of a cooling medium, and condensing that is another component of the air conditioning system. Along with a condenser, an expansion valve, an evaporator, and the like (all not shown), they are provided on a cooling medium circulation path.

  The compressor 100 compresses the refrigerant gas G (gas) as a gaseous cooling medium taken from the evaporator of the air conditioning system, and supplies the compressed refrigerant gas G to the condenser of the air conditioning system. The condenser liquefies the compressed refrigerant gas G and sends it to the expansion valve as a high-pressure liquid refrigerant.

  The high-pressure liquid refrigerant is reduced in pressure by the expansion valve and sent to the evaporator. The low-pressure liquid refrigerant absorbs heat from ambient air and vaporizes in the evaporator, and cools the air around the evaporator by heat exchange with the heat of vaporization.

  The compressor 100 is housed in the housing 10 including the case 11 and the front head 12, and includes a compressor body 60 that compresses the refrigerant gas G (gas, compressed gas) by rotating the rotating shaft 51, and a compression. A cyclone block 70 (oil separator) that separates the refrigerating machine oil R (oil component) from the high-pressure refrigerant gas G discharged from the compressor main body 60 and the rotary shaft 51 of the compressor main body 60 are assembled to the main body 60 of the compressor. It is the structure provided with the driving force connection / disconnection part 80 which connects / disconnects the rotational driving force which should be transmitted.

  The compressor main body 60 accommodated in the housing 10 includes a rotating shaft 51 that is driven to rotate about an axis, a columnar rotor 50 that rotates integrally with the rotating shaft 51, and an outer peripheral surface of the rotor 50. Is embedded in the outer periphery of the rotor 40 and the outer periphery of the rotor 50 so that the outer end of the cylinder 40 can protrude outwardly. The amount of protrusion is variable so as to follow the contour shape of the inner peripheral surface 49, five plate-like vanes 58 embedded in the rotor 50 at equal angular intervals around the rotation shaft 51, and both open end surfaces of the cylinder 40 The front side block 30 and the rear side block 20 are fixed so as to cover the open end surface from the outside.

  The volume of each compression chamber 48 defined by the two side blocks 20, 30, the rotor 50, the cylinder 40, and the two vanes 58, 58 that precede and follow the rotation direction of the rotation shaft 51 is By repeating the increase / decrease according to the rotation, the refrigerant gas G sucked into each compression chamber 48 is compressed and discharged.

  One of the portions of the rotary shaft 51 protruding from both end surfaces of the rotor 50 is pivotally supported by the bearing portion 32 of the front side block 30 and extends outward through the front head 12. The penetrating portion is pivotally supported by the front head 12.

  Similarly, the other side of the protruding portion of the rotating shaft 51 is pivotally supported by the bearing portion 22 of the rear side block 20.

  The case 11 has a cylindrical body that is open at one end, and the cyclone block 70 is inserted in the specific direction M and accommodates the cyclone block 70 therein.

  The front head 12 is assembled so as to cover the opened portion of the case 11, thereby forming an accommodation space inside the housing 10.

  The driving force connecting / disconnecting portion 80 is disposed in a pulley 82 that is rotatably supported outside the boss of the front head 12 via a radial ball bearing 14, and in an annular space formed inside the pulley 82. 12 and an armature 83 fixed to the rotary shaft 51 and abutting against the side wall 82a of the pulley 82 by the magnetic force generated by energizing the electromagnetic coil 81 and rotating integrally with the pulley 82. ing.

  The front head 12 is formed with a suction port 12a through which a low-pressure refrigerant gas G is sucked from the evaporator. A check valve 12b for preventing the refrigerant gas G from flowing backward is provided in the suction port 12a. Yes.

  The suction port 12a communicates with a suction chamber 34 formed between the front side block 30 and the front head 12 of the compressor body 60 accommodated in the housing 10, and the refrigerant gas G 34 is sucked into the compression chamber 48 of the compressor main body 60 through the suction hole 31.

  On the other hand, the case 11 is formed with a discharge port 11a for discharging the high-pressure refrigerant gas G compressed by the compressor body 60 to the condenser.

  The discharge port 11a communicates with a discharge chamber 21 formed between the rear side block 20 of the compressor main body 60 and the case 11 accommodated in the housing 10, and the refrigerant gas G is supplied to the compressor main body 60. Is discharged into the discharge chamber 21 through the cyclone block 70.

  The cyclone block 70 is assembled and fixed to the outer surface 29b of the rear side block 20 of the compressor main body 60 with a fastening member such as a bolt (not shown), and has a substantially cylindrical main body portion 71 and a main body portion 71. And a substantially cylindrical inner cylindrical portion 72 provided inside the main body 71 are integrally formed by die-casting via a folded portion 73.

  In addition, a swirl flow forming space 76 is formed between the inner peripheral surface of the main body 71 and the outer peripheral surface of the inner cylinder 72 to generate a swirl flow of the high-pressure refrigerant gas G discharged from the compression chamber. Then, the refrigerant gas G mixed with the refrigerating machine oil R passes through the swirl flow forming space 76 to generate a swirling flow of the refrigerant gas G, whereby the refrigerating machine oil R mixed in the refrigerant gas G is centrifuged. The

  Here, the cyclone block 70 alone does not have a bottom wall portion serving as a bottom plate, and therefore, an end portion on the lower end side (lower side opening 75) is opened (see FIGS. 1 and 3). . As a result, it is possible to ensure the direction in which the inner cylinder portion 72 and the main body portion 71 are integrally molded, and to perform integral molding by die casting.

  On the other hand, if the bottom wall portion does not exist in the cyclone block 70, the refrigerant gas G after the refrigerating machine oil R is centrifuged by the swirling flow generated in the swirling flow forming space 76 is guided to the inner space 77 of the inner cylinder portion 72. I can't.

  On the other hand, as shown in FIGS. 1 and 2, the compressor 100 of the present embodiment has a flat plate shape in which the case 11 of the housing 10 extends from the inner end wall 11 b in a direction opposite to the specific direction M. The rib 11c has a part 11e (a part of a substantially circular shape (substantially cylindrical in three dimensions) in FIG. 2B surrounded by a two-dot chain line and a solid line) of the rib 11c. In a state where the machine main body 60 is housed in the case 11, the opening 74, 75 at both ends of the main body 71 is formed at a position that closes the opening 75 on the side opposite to the side where the inner cylinder 72 is provided. Yes.

  Specifically, as shown in FIG. 3 (a), a notch 71b that accepts the penetration of the part 11e of the rib 11c is formed in a part of the peripheral wall 71a of the main body 71, and the part 11e of the rib is By being inserted into the inner space of the main body 71 through the cut 71b, the opening 75 is closed.

  As shown in FIG. 3B, the notch 71b is formed in a range larger than the inner peripheral diameter of the main body 71 and smaller than the outer peripheral diameter, whereby a part 11e of the rib 11c has an opening 75. The rib 11e corresponds to the bottom wall portion of the cyclone block 70, and the refrigerant gas G after the refrigerating machine oil R is centrifuged by the swirling flow generated in the swirling flow forming space 76, The light can be reflected by the rib 11 e and guided to the inner space 77 of the inner cylinder portion 72.

  Further, in a state where the rib 11e is received in the notch 71b formed in the peripheral wall 71a of the main body 71 (a state where the rib 11e constitutes the bottom wall portion of the cyclone block 70), the gap between the notch 71b and the rib 11e. Therefore, relative vibration of the compressor body 60 with respect to the housing 10 can be suppressed.

  That is, since the cyclone block 70 is fixed to the compressor main body 60, the cyclone block 70 is not cut when the rib 11 e is received in the cuts 71 b formed in the peripheral wall 71 a of the main body portion 71 of the cyclone block 70. Since the rib 11e of the housing 10 is received by 71b, the cyclone block 70 is also supported by the rib 11e. This means that the compressor body 60 is supported by the housing 10 via the cyclone block 70. The relative vibration of the compressor main body 60 with respect to the housing 10 can be suppressed by increasing the number of support portions of the compressor main body 60 by the housing 10.

  When it is necessary to form an oil drain hole 11d for discharging the refrigerating machine oil R separated by the cyclone block 70 in the rib 11e corresponding to the bottom wall portion of the main body 71, the cyclone block 70 of the housing 10 is used. It is possible to insert a drilling tool such as a drill from the discharge port 11a formed close to the hole and drill the rib 11e with this drill or the like to form the oil drainage hole 11d.

  Further, as shown in FIGS. 2A and 2B, the cyclone block 70 according to the present embodiment has a main body portion in a state where a part 11 f of the rib 11 c is accommodated in the case 11. 71 extends to a part of the outer periphery of the peripheral wall 71a.

  The refrigerating machine oil R separated by the cyclone block 70 is stored at the bottom of the space (discharge chamber 21) outside the peripheral wall 71a of the main body 71 of the cyclone block 70. The stored refrigerating machine oil R is stored in the cyclone block 70. The refrigerating machine oil R that has been discharged from the block 70 is easily wound up, and the refrigerating machine oil R that has been wound up is transported again to the refrigerant gas G from which the refrigerating machine oil R has been separated by the cyclone block 70, and passes through the discharge port 11 a. Through the compressor 100.

  However, according to the cyclone block 70 in the compressor 100 of the present embodiment, the rib 11f of the case 11 extending to a part of the periphery of the peripheral wall 71a of the main body 71 has the refrigerating machine oil R stored in the bottom of the discharge chamber 21. Even if the refrigerating machine oil R is splashed by colliding with the liquid level of the refrigerating machine oil R stored in the cyclone block 70 so that the refrigerating machine oil R discharged from the oil drain hole 11d of the cyclone block 70 covers the upper part of the liquid level, the sprinkled refrigerating machine oil R collides with the rib 11f and is prevented from being wound upward, and the refrigerator oil R can be prevented from being excessively discharged from the compressor 100.

  In addition, although the compressor 100 of embodiment mentioned above is a gas compressor of a vane rotary type, the gas compressor which concerns on this invention is not limited to the thing of the vane rotary type of embodiment, Other types The present invention can also be applied to gas compressors such as a swash plate reciprocating type or a scroll type gas compressor.

It is a longitudinal section showing a vane rotary type compressor which is one embodiment of a gas compressor concerning the present invention. It is a figure which shows the case in the compressor shown in FIG. 1, (a) is the figure by arrow A in FIG. 1, (b) represents the cross section along the BB line in (a), respectively. It is a figure which shows the cyclone block in the compressor shown in FIG. 1, (a) is the figure seen from the side surface, (b) represents the figure by the arrow C in (a), respectively.

Explanation of symbols

11 Case (housing)
11b End surface (inner wall surface)
11c rib 70 cyclone block (oil separator)
71 Body 72 Inner cylinder 100 Compressor (gas compressor)

Claims (3)

A compressor body, an oil separator that separates oil from the compressed gas discharged from the compressor body, and a housing in which the oil separator is inserted in a specific direction and accommodates the oil separator inside,
In the oil separator, a substantially cylindrical main body portion and a substantially cylindrical inner cylinder portion that is substantially concentric with the main body portion and provided inside the main body portion are integrally formed by die casting. And forming the swirling flow of the compressed gas between the inner peripheral surface of the main body portion and the outer peripheral surface of the inner cylinder portion, and centrifuging the oil.
The housing has a plate-like rib extending from an end wall of the housing in a direction opposite to the specific direction, and the rib has the main body in a state where the oil separator is accommodated in the housing. A gas compressor characterized in that the gas compressor is formed at a position that closes the opening on the opposite side of the opening at both ends of the part to the side on which the inner cylinder part is provided.   2. The gas compressor according to claim 1, wherein the rib extends to a part of the periphery of the peripheral wall of the main body in a state where the oil separator is accommodated in the housing. .   A cut is formed in a part of the peripheral wall of the main body part to receive the penetration of the rib, and the rib is positioned in a state of closing the opening by being inserted inside the main body part through the cut. The gas compressor according to claim 1, wherein the gas compressor is provided.

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