JP4850263B2 - Scroll compressor - Google Patents

Description

  The present invention relates to a scroll type compressor that has a fixed scroll and a movable scroll that are meshed with each other to form a compression chamber, and compresses fluid by turning the movable scroll.

  Conventionally, a fixed scroll having a fixed plate and a spiral fixed wrap upright on the fixed plate, and a movable scroll arranged so that the movable plate and a spiral movable wrap upright on the movable plate are engaged with the fixed wrap. And a compression chamber formed between the fixed scroll and each wrap of the movable scroll and the fixed plate and the movable plate by rotating the movable scroll through an eccentric drive pin. A scroll type compressor is known in which a fluid is compressed by gradually moving to a central part.

  As such a scroll type compressor, for example, as shown in Patent Document 1, a movable scroll and a fixed scroll are arranged inside a front housing, and the fixed scroll is connected to an end of the front housing. A structure that is fixed to a rear housing has been proposed. In the compressor having this structure, the refrigerant compressed by the movable scroll and the fixed scroll is introduced into the separation chamber provided with the separation pipe through the introduction hole of the rear housing, and the refrigerant and the lubricating oil contained in the refrigerant are mixed. The lubricating oil is separated and discharged to the oil storage chamber through the discharge hole. The introduction hole and the discharge hole are formed along the axial direction of the rear housing, and the separation chamber is formed in a direction substantially orthogonal to the axial line. A part of the separation tube is inserted into the separation chamber and screwed into the rear housing (for example, see Patent Document 1).

JP 11-82352 A

  By the way, in the scroll type compressor having such a configuration, since the high-pressure refrigerant compressed through the introduction hole is introduced into the separation tube, the separation tube has a predetermined strength that can withstand the pressure of the refrigerant. It is required and the separation tube needs to be firmly fixed to the rear housing.

  However, the conventional separation tube according to Patent Document 1 is structured to be screwed and fixed to the rear housing. However, the screw is processed into the screwing portion of the separation tube and the inside of the rear housing. And the assembly work of screwing and attaching the separation tube to the rear housing occurs. As described above, the prior art requires a fixing means for firmly fixing the separation tube to the rear housing, which increases the number of parts and makes the assembly work complicated and requires time for the assembly. .

  The present invention has been made in consideration of the above-mentioned various problems, and a scroll compressor capable of reducing the number of assembling steps of the oil branch pipe and reducing the number of parts and the manufacturing cost thereof. The purpose is to provide.

In order to achieve the above object, the present invention provides a discharge chamber formed between a fixed scroll and a housing, into which a compressed fluid is led out under a turning action of a movable scroll meshed with the fixed scroll, In a scroll compressor comprising a separation chamber that communicates with the discharge chamber and separates the lubricating oil contained in the fluid, and an oil storage chamber that communicates with the separation chamber and stores the lubricating oil.
A dividing wall formed in the housing and extending along the axial direction of the housing to divide the discharge chamber and the separation chamber, respectively;
An oil separation member having a pipe portion inserted into the separation chamber and a flange portion formed at an end of the pipe portion, and distributing the fluid and lubricating oil in the separation chamber;
With
The flange portion is sandwiched between the fixed scroll and the housing through a clamping force when the fixed scroll and the housing are joined.

  According to the present invention, the oil separation member including the pipe portion and the flange portion is sandwiched between the fixed scroll and the housing via the flange portion, and tightening is performed when the fixed scroll and the housing are joined. It is set as the structure hold | maintained using an applied force. Therefore, a fixing means for firmly fixing the oil separating member to the fixed scroll and the housing is not necessary, and the oil separating member can be easily assembled. As a result, the number of parts and the manufacturing cost can be reduced as compared with the conventional scroll compressor, and the assembling property of the oil separation member can be improved.

  Further, when the pressure of the fluid introduced into the separation chamber is applied to the oil separation member, the flange portion of the oil separation member is sandwiched in a state of surface contact between the fixed scroll and the housing. The pressure is applied to the contact surface of the fixed scroll or the housing via the flange portion, and the load on the oil separation member can be reduced. Therefore, the strength of the oil separation member can be designed to be smaller than that of the separation pipe in the conventional scroll compressor, and the manufacturing cost can be reduced accordingly.

  Furthermore, it is good to form the recessed part which can accommodate a flange part in the joint surface of the fixed scroll joined with a housing, and to set the depth dimension of the said recessed part substantially the same as the height dimension of the said flange part. Thus, when the flange portion is accommodated in the recess, the end surface of the flange portion does not protrude with respect to the joint surface, and the end surface and the joint surface can be made substantially flush. Therefore, for example, it is possible to improve the workability of the gasket by making the thin gasket abutted against the joint surface into a simple shape. Accordingly, when sealing the gasket by bringing the gasket into contact with the joint surface, the gasket is securely brought into contact with the joint surface and the end surface of the flange portion, and the gasket is fixed between the fixed scroll and the housing. Sealability can be improved.

  Furthermore, the dividing wall between the discharge chamber and the separation chamber is provided with a communication passage that opens on the joint surface side of the housing and communicates the discharge chamber and the separation chamber, and the fluid is discharged from the discharge chamber through the communication passage. It can be distributed to the separation chamber. As a result, as compared with the case of forming a communication path that connects the discharge chamber and the separation chamber by drilling or the like inside the housing, it is simple to simply process the groove from the joint surface side of the housing to the dividing wall. A communication path can be formed between the discharge chamber and the separation chamber. Therefore, the processing man-hour of a communicating path can be reduced. In addition, by forming the communication path in the dividing wall, the bonding surface can be maintained in a flat shape without projecting with respect to the bonding surface of the housing. Sealability is suitably maintained.

  In addition, the joint surface of the fixed scroll includes a discharge passage formed along the joint surface and communicated with the concave portion, and the discharge passage is formed in the housing when the fixed scroll and the housing are joined. It is preferable to communicate with a discharge port for discharging the fluid to the outside. As a result, the discharge passage is formed along the joint surface, and the fluid is guided from the recessed portion to the discharge port through the discharge passage. Therefore, the discharge passage is compared with the case where the fixed scroll is formed by drilling or the like. Thus, the discharge passage can be easily processed with respect to the joint surface. For this reason, the number of processing steps of the discharge passage is reduced, and an internal space required when the discharge passage is formed in the inside becomes unnecessary, and the fixed scroll is reduced in size by reducing the thickness dimension of the fixed scroll. I can plan.

  Furthermore, when the flange portion is provided with a groove portion facing the discharge passage through the recess and communicating with the tube portion and recessed on the tube portion side, fluid flows through the tube portion to the groove portion. Furthermore, since the fluid can be circulated in the groove portion, the groove portion can function as a part of the discharge passage. Therefore, the flow passage area of the discharge passage can be easily increased without increasing the processing time and the processing amount (for example, the depth of the recess) when forming the discharge passage.

  Furthermore, by providing a rotation restricting means for restricting the rotational displacement of the flange portion in the circumferential direction in the concave portion between the flange portion and the concave portion, the flange portion is fixed without being rotationally displaced in the concave portion. The oil separation member can be reliably positioned with respect to the scroll, and the assembling property of the oil separation member can be improved. Further, the rotational displacement of the flange portion can prevent the groove portion in the flange portion from being displaced from the discharge passage, and the groove portion and the discharge passage can always be in a communicating state.

  The discharge passage may be formed deeper than the contact surface of the recess with which the flange portion comes into contact, and may be formed to face the tube portion. As a result, even when the flange portion is in contact with the contact surface in the recess, the fluid can be circulated through the discharge passage formed deeper than the contact surface, and the flow path area can be increased. Can do.

  According to the present invention, the following effects can be obtained.

  That is, the oil separation member is sandwiched between the fixed scroll and the housing via the flange portion, and is held by a clamping force when the fixed scroll and the housing are joined. A fixing means for fixing the separating member is not required, and the number of parts and the manufacturing cost can be reduced, and the assembling property of the oil separating member can be improved.

  Further, when a fluid pressure is applied to the oil separation member, the flange portion is sandwiched in surface contact between the fixed scroll and the housing, so that the pressure is borne by the fixed scroll or the housing. The load on the oil separation member can be reduced. Therefore, it is possible to reduce the manufacturing cost by designing the strength of the oil separation member to be small.

1 is an overall longitudinal sectional view of a scroll compressor according to an embodiment of the present invention. FIG. 2 is a partially omitted exploded perspective view of the scroll compressor of FIG. 1. It is the top view which looked at the fixed scroll in the scroll compressor of Drawing 2 from the fixed side spiral wall side. It is a longitudinal cross-sectional view which shows the movable scroll, fixed scroll, gasket, and rear housing in the scroll compressor of FIG. FIG. 2 is an exploded perspective view in which the fixed scroll and the rear housing of FIG. 1 are developed in a direction in which they are separated from each other with the joint surface as a boundary. It is the top view seen from the back side to which the gasket in a fixed scroll is mounted | worn. FIG. 7 is an exploded perspective view showing a state where an oil separation pipe is detached from the back surface of the fixed scroll of FIG. 6. It is a longitudinal cross-sectional view which shows the state which attached the oil separation pipe | tube to the circular recessed part of the fixed scroll, and was clamped between the said fixed scroll and the rear housing via the gasket. It is a longitudinal cross-sectional view which shows the state by which the oil separation pipe which concerns on the modification was fixed to the fixed scroll via the fixing bolt. It is a top view of the rear housing seen from the joint surface side where a gasket is mounted | worn. It is a top view which shows the state which mounted | wore with the gasket with respect to the joint surface of the rear housing, and overlapped the 1st-4th recessed part and the lead-out hole of the fixed scroll. It is a longitudinal cross-sectional view which shows the relationship between the separation chamber, the lead-out passage, and the throttle hole of the gasket in a state where the fixed scroll, the gasket and the rear housing are assembled. It is sectional drawing along the XIII-XIII line | wire of FIG. It is the top view which looked at the gasket from the fixed scroll side.

  A preferred embodiment of a scroll compressor according to the present invention will be described in detail below with reference to the accompanying drawings.

  In FIG. 1, reference numeral 10 indicates a scroll compressor according to an embodiment of the present invention.

  The scroll compressor 10 includes a front housing 12 formed in a cup shape, and a rear housing (housing) 14 connected to the front housing 12.

  In the upper part of the front housing 12, for example, a suction port 16 for introducing a fluid made of a refrigerant gas or the like into the inside thereof is formed. On the other hand, at the upper part of the rear housing 14, a discharge port 18 is formed for discharging the compressed fluid obtained by compressing the fluid by the scroll compressor 10 to, for example, a refrigerant circulation system. The front housing 12 and the rear housing 14 are provided with a plurality of attachment portions 20 for attaching the scroll compressor 10 to, for example, an engine or an external device. Inside the front housing 12, a fixed scroll 22 and a movable scroll 24 that turns with respect to the fixed scroll 22 are inserted from the opened one end side.

  The fixed scroll 22 includes a fixed-side substrate portion 26 sandwiched between the front housing 12 and the rear housing 14, and a fixed-side spiral wall 28 erected in a spiral shape from the fixed-side substrate portion 26 toward the movable scroll 24. It consists of.

  As shown in FIGS. 2 and 3, the fixed-side spiral wall 28 is formed so that the wall thickness gradually increases in the radially outward direction from the outermost peripheral end of the fixed-side spiral wall 28 toward the inner peripheral end. Thus, the portion that is vertically upward in the scroll compressor 10 is formed to be the thickest. In the upper part of the fixed-side spiral wall 28, a guide passage 30 that is recessed in a radially inward direction is formed.

  The guide passage 30 is formed in a substantially rectangular shape in cross section and substantially in parallel with the axis of the fixed scroll 22, and an oil supply hole 32 is formed in the fixed side substrate portion 26 facing the guide passage 30. The oil supply hole 32 communicates with a supply passage 34 penetrating the fixed-side substrate portion 26, and communicates with the back surface (joining surface) 22a side of the fixed scroll 22 through the supply passage 34 (see FIG. 4). Further, the guide passage 30 is formed with a set of dam walls 36 erected outward in the radial direction on both sides of the guide passage 30 (see FIG. 3). The supply passage 34 is also formed substantially in parallel with the axis of the fixed scroll 22 like the guide passage 30. Thus, when lubricating oil (for example, oil) is supplied from the rear housing 14 side to the supply passage 34, the lubricating oil is discharged to the guide passage 30 through the oil supply hole 32, and the blocking wall Since the flow is prevented by 36 from flowing in the circumferential direction of the fixed spiral wall 28, it flows along the guide passage 30.

  On the other hand, as shown in FIGS. 1 and 2, the rear housing 14 is mounted on the back surface 22 a of the fixed side substrate portion 26 in the fixed scroll 22 via a gasket 38 formed in a thin plate shape. A lead-out hole 42 communicating with a discharge chamber 40 (described later) formed between the compression chamber 110 and the rear housing 14 is formed in a substantially central portion of the back surface 22a.

  A discharge valve 44 that closes the outlet hole 42 and bends and opens when the fluid compressed in the compression chamber 110 reaches a predetermined pressure is formed on the back surface 22a of the fixed scroll 22, and the discharge valve. A retainer 46 for restricting the valve opening of 44 is provided. One end of the discharge valve 44 is disposed at a position facing the lead-out hole 42, and the other end is fixed to a straight line spaced apart from the lead-out hole 42 by a predetermined distance via a bolt 48 with a retainer 46. (See FIGS. 5 and 6). The discharge valve 44 is seated so as to close the outlet hole 42, and the discharge valve 44 is separated from the outlet hole 42 by the pressure of the compressed fluid introduced into the outlet hole 42, so that the fluid passes through the outlet hole 42. It is supplied to the discharge chamber 40.

  Since the retainer 46 is inclined at a predetermined angle in a direction away from the back surface 22a with the end fixed by the bolt 48 as a base point, the discharge valve 44 is opened by the compressed fluid led out through the lead-out hole 42. When this happens, the discharge valve 44 comes into contact with the retainer 46 and its valve opening is regulated.

  Further, as shown in FIGS. 5 and 6, the supply passage 34 opened to the back surface 22 a of the fixed scroll 22 is formed in an upper portion of the back surface 22 a and is arranged substantially in line with the outlet hole 42. The back surface 22a is formed between the lead-out hole 42 and the supply passage 34, and is recessed by a predetermined depth. The first recess 50 is adjacent to the first recess 50, and an oil separation pipe (oil separation member). ) 52 is disposed, and third and fourth recesses 56 and 58 are formed on the lower side of the back surface 22a. In addition, the 1st-4th recessed parts 50, 54, 56, and 58 are depressed by substantially the same depth from the surface of the back surface 22a.

  The first recess 50 is formed substantially parallel to the discharge valve 44 and the retainer 46 and is formed at a position facing the discharge chamber 40 of the rear housing 14.

  The second recess 54 is disposed at a position that is substantially symmetric with the first recess 50 with respect to a vertical line passing through the center of the outlet hole 42, and extends in the vertical direction of the back surface 22 a to separate the rear housing 14. 62 and a discharge chamber 64 (described later). An oil separation pipe 52 is attached to one end of the second recess 54 on the lead-out hole 42 side via a circular recess (recess) 60 formed in a substantially circular shape (see FIG. 7). The depth D1 of the second recess 54 is set slightly deeper than the depth D2 of the circular recess 60 (D1> D2) (see FIG. 8). In addition, it is good for the bottom part of the circular recessed part 60 to provide the planar seating surface which faces the 2nd recessed part 54, and contact | abuts and hold | maintains the flange part 68 (after-mentioned) of the said oil separation pipe | tube 52. FIG. Thus, by forming the second concave portion 54 deeper than the circular concave portion 60, even when the flange portion 68 abuts against the seating surface of the circular concave portion 60, the fluid is circulated through the second concave portion 54. In addition, the flow path area of the second recess 54 that functions as a discharge passage can be increased.

  As shown in FIGS. 6 and 7, the oil separation pipe 52 is formed in a cylindrical portion (tube portion) 66 formed in a cylindrical shape, and is formed at an end portion of the cylindrical portion 66 so as to expand radially outward. Disc-shaped flange portion 68. The cylindrical portion 66 is connected eccentrically with respect to the center of the disc-shaped flange portion 68, and a passage 70 penetrating in the axial direction is formed inside the cylindrical portion 66 and the flange portion 68.

  The flange portion 68 is formed with an engagement groove 72 that is recessed in a substantially triangular shape in the radial inward direction from the circumferential surface thereof. When the oil separation pipe 52 is attached to the circular recess 60, the engagement groove 72 is formed. The groove 72 engages with an engaging protrusion 74 formed in the circular recess 60. Accordingly, the oil separation pipe 52 is positioned with respect to the fixed scroll 22 and the rotational displacement of the flange portion 68 in the circular recess 60 is restricted. In other words, the engagement protrusion 74 formed in the circular recess 60 functions as a rotation restricting means for the oil separation pipe 52.

  Further, the flange portion 68 is formed with a groove portion 76 that is recessed toward the tube portion 66 on the surface facing the circular recess portion 60. When the flange portion 68 is inserted into the circular recess portion 60, the groove portion 76 is 2 faces the recess 54 (see FIG. 8). In other words, the passage 70 of the oil separation pipe 52 and the second recess 54 communicate with each other through the groove 76.

  The oil separation pipe 52 is configured such that the gasket 38 is brought into contact with the back surface 22a of the fixed scroll 22 with the flange portion 68 inserted into the circular recess 60, and the rear housing 14 is brought into contact with the gasket 38. The oil separation pipe 52 is sandwiched and held between the fixed scroll 22 and the rear housing 14.

  On the other hand, instead of providing the engagement groove 72 of the oil separation pipe 52 and the engagement protrusion 74 of the circular recess 60 described above, the flange 68 of the oil separation pipe 52a shown in FIG. It may be temporarily fixed at 78. As a result, the oil separation pipe 52 is held in a state of being positioned with respect to the fixed scroll 22, and the oil separation pipe 52 is more reliably secured by the clamping force by the fixing bolt 78 and the clamping force by the fixed scroll 22 and the rear housing 14. Fixed to.

  The means for temporarily positioning the oil separation pipe 52a with respect to the fixed scroll 22 is not limited to the fixing bolt 78 described above, and may be performed via a positioning pin or the like. The concave portion 60 and the flange portion 68 may be formed in a fitting shape, or the flange portion 68 may be press-fitted into the circular concave portion 60.

  The configuration in which the oil separation tube 52a is temporarily fixed to the circular recess 60 with the fixing bolt 78 is different from the configuration in which the separation tube in the conventional scroll compressor is screwed and fixed to the rear housing. In the case of the present invention, only the positioning is performed by temporarily fixing the oil separation pipe 52a to the circular recess 60 via the fixing bolt 78, and the fluid introduced into the separation chamber is the oil separation pipe 52a. It is not fixed with a tightening force that can withstand this pressure. Therefore, compared with the conventional method for fixing the separation tube, its fastening force is small and can be temporarily fixed.

  As shown in FIG. 6, the third recess 56 is disposed at a position that is substantially symmetric with the second recess 54 with the lead-out hole 42 as the center. It is formed in the position which opposes.

  The fourth recess 58 is arranged at a position that is in line with the discharge valve 44 and the retainer 46 and is formed at a position facing an oil storage chamber 80 (described later) of the rear housing 14.

  Between the circular recessed part 60 and the 4th recessed part 58 in the 2nd recessed part 54, the 1st communicating path 82 is formed substantially parallel to the discharge valve 44 and the retainer 46, and the said 1st communicating path 82 is predetermined from the back surface 22a. It is formed in a substantially straight line with a depth. When the fixed scroll 22 is assembled to the rear housing 14, one end of the first communication passage 82 faces the supply passage 34 communicating with the separation chamber 62 of the rear housing 14, and the other end is oil storage. It arrange | positions so that the chamber 80 may be opposed.

  A second communication passage 84 is formed below the fourth recess 58 so as to be substantially orthogonal to the axes of the discharge valve 44 and the retainer 46, and the second communication passage 84 is substantially the same as the first communication passage 82. It is formed in a substantially straight line indented to a depth of. When the fixed scroll 22 is assembled to the rear housing 14, one end portion of the second communication passage 84 faces a filter chamber 88 (described later) in which the filter 86 is mounted, and the other end portion is the rear housing. 14 is disposed so as to face an end portion of an oil supply groove 90 (described later) formed in 14.

  Further, a plurality of (for example, four locations) first bolt holes 92 are formed in the vicinity of the outer peripheral portion of the fixed scroll 22 at a predetermined interval, and a plurality of (for example, four) first bolt holes 92 are inserted through the first bolt holes 92. The bolt 94 is screwed into the screw hole 100 of the front housing 12 through the second bolt hole 96 of the gasket 38 and the third bolt hole 98 of the rear housing 14. As a result, the fixed scroll 22 is integrally fixed to the rear housing 14 and the front housing 12. At this time, an O-ring 102 is attached to the fixed-side substrate portion 26 of the fixed scroll 22 through an annular groove, and the suction chamber 104 formed by the fixed scroll 22 and the front housing 12 is sealed by the O-ring 102. Thus, airtightness is maintained (see FIG. 1).

  As shown in FIG. 1, the movable scroll 24 is erected in a spiral shape from the movable side substrate portion 106 to the fixed scroll 22 side from the movable side substrate portion 106, and engages with the fixed side spiral wall 28. And a spiral wall 108.

  A compression chamber 110 is formed by the fixed-side substrate portion 26 and the fixed-side spiral wall 28 in the fixed scroll 22 and the movable-side substrate portion 106 and the movable-side spiral wall 108 in the movable scroll 24.

  In order to seal the compression chamber 110, seal members 112 are slidably contacted with the movable side substrate portion 106 and the fixed side substrate portion 26 at the respective ends of the fixed side spiral wall 28 and the movable side spiral wall 108. It is installed.

  Further, when the movable side substrate portion 106 abuts on the fixed side spiral wall 28, the end portion of the guide passage 30 of the fixed scroll 22 is closed by the movable side substrate portion 106, and the guide passage 30 and the movable side substrate portion 106 are closed. It functions as an oil storage tank 114 in which a predetermined amount of lubricating oil is stored (see FIG. 4).

  A shaft portion 118 that is one end of the rotating shaft 116 is inserted into the other end portion of the front housing 12. The shaft portion 118 is rotatably supported via a first bearing 120 held at the other end of the front housing 12. A sealing member 122 for sealing the suction chamber 104 is fitted into the shaft portion 118 of the rotating shaft 116. The sealing member 122 is supported by an opening shoulder portion of the front housing 12, and is configured, for example, by covering a ring-shaped core made of a metal material with a rubber material or a resin material.

  On the other hand, the other end of the rotating shaft 116 is provided with a support 124 having a diameter larger than that of the one end. The support body 124 is rotatably supported by inserting an outer peripheral surface of the support body 124 into a second bearing 126 held by the front housing 12. A pin 128 eccentric to the axis is fixed to the support 124. That is, the rotating shaft 116 is rotatably supported by the first and second bearings 120 and 126.

  A mounting hole 130 opened toward the second bearing 126 side is formed in the movable side substrate portion 106 of the movable scroll 24, and a bush 134 is rotatably supported in the mounting hole 130 via a swivel bearing 132. ing. The bush 134 is formed with a hole 136 that is eccentric with respect to the axis thereof, and the pin 128 of the support 124 is inserted into the hole 136.

  An annular groove is formed at the tip of the pin 128, and a locking ring 138 is fitted into the annular groove. Accordingly, the axial movement of the pin 128 relative to the bush 134 is restricted by the locking ring 138 mounted in the annular groove. In addition, a disc-shaped balance weight 140 is mounted near the base of the bush 134.

  Inside the front housing 12, there is a thrust plate 142 that slidably supports the movable scroll 24 by a sliding contact surface, and an Oldham ring that restricts the rotation of the movable scroll 24 and allows the movable scroll 24 to turn. 144, and the Oldham ring 144 is supported so as to be reciprocally displaceable in one direction orthogonal to the axis of the rotating shaft 116, and the axial thrust force applied to the movable scroll 24 is transmitted via the thrust plate 142. An Oldham base 146 to be received is disposed.

  A pair of first engaging recesses 148 that allow the movable scroll 24 to reciprocate only in the radial direction are formed on the front side of the movable side substrate 106 in the movable scroll 24. A pair of first engagement protrusions 150 protruding in the radial direction of the Oldham ring 144 are slidably engaged with the first engagement recess 148.

  Further, in order to allow the movable scroll 24 to reciprocate only in the direction orthogonal to the first engagement recess 148, the Oldham ring 144 has a diameter orthogonal to the first engagement protrusion 150. A pair of second engaging protrusions (not shown) protruding in the direction are formed. The pair of second engaging convex portions are slidably engaged with a pair of second engaging concave portions (not shown) protruding in the radial direction of the Oldham base 146.

  Further, the Oldham base 146 is fastened by a plurality of (for example, two) bolts 154 via the shim 152. This shim 152 is mounted to adjust the axial gap between the fixed scroll 22 and the movable scroll 24 to a predetermined value. When the gap is appropriately adjusted, the shim 152 It is not necessary to wear it.

  A pulley 158 is attached to the other end portion of the front housing 12 via a third bearing 156 on the outer peripheral portion thereof. A rotational force is transmitted to the pulley 158 from a rotational drive source such as an engine (not shown), and the rotational force is transmitted to the rotating shaft 116 by an on / off operation of an electromagnetic clutch 160 disposed in the pulley 158 or Detachment is performed.

  As shown in FIG. 2, a pair of first positioning holes 162 are formed on the end surface of the front housing 12 at a predetermined interval in a diagonal line. In the first positioning hole 162, a pair of positioning pins 164 are inserted and fixed at predetermined positions in the axial direction thereof. The positioning pin 164 functions as a positioning reference when the front housing 12, the fixed scroll 22, the gasket 38, and the rear housing 14 are assembled.

  That is, a pair of penetrating second positioning holes 166 are formed in the fixed scroll 22 corresponding to the positioning pins 164, and a pair of third positioning holes 168 are formed in the rear housing 14. 38 is formed with a pair of penetrating fourth positioning holes 170.

  Note that the positioning pin 164 may be inserted in advance into the second positioning hole 166 through which the fixed scroll 22 passes, or may be inserted into the third positioning hole 168 of the rear housing 14 and fixed in advance.

  As shown in FIG. 1, the rear housing 14 is connected to the front housing 12 via a fixed scroll 22 and a gasket 38. The rear housing 14 is sandwiched between a fixed scroll 22 and a gasket 38. As shown in FIGS. 5 and 10, the rear housing 14 is opened to the joint surface 172 side where the gasket 38 abuts, and is compressed in the compression chamber 110. A discharge chamber 40 into which the fluid is introduced; a separation chamber 62 that communicates with the discharge chamber 40 and separates the lubricating oil contained in the fluid; an oil storage chamber 80 in which the separated lubricating oil is stored; A discharge chamber 64 into which fluid is introduced after the lubricating oil is separated is formed.

  As shown in FIG. 2, in the rear housing 14, the discharge chamber 40 and the oil storage chamber 80 are separated by a first boundary wall (divided wall) 174, and the discharge chamber 40 and the discharge chamber 64 are separated by a second boundary. The oil storage chamber 80 and the discharge chamber 64 are separated by a third boundary wall (divided wall) 178 while being separated by a wall (divided wall) 176. The separation chamber 62 is separated from the discharge chamber 40, the oil storage chamber 80, and the discharge chamber 64 by an annular wall (partition wall) 180 formed around the separation chamber 62.

  As shown in FIG. 11, when the fixed scroll 22 is assembled to the rear housing 14, the discharge chamber 40 is positioned so as to face the lead-out hole 42, the first and third recesses 50, 56 of the fixed scroll 22. And is recessed by a predetermined depth along the axial direction of the rear housing 14. The discharge chamber 40 is formed on the joint surface 172 of the rear housing 14 so as to be about half the surface area. A discharge valve 44 and a retainer 46 are inserted into the discharge chamber 40.

  The separation chamber 62 is provided adjacent to the discharge chamber 40 and the discharge chamber 64 via the annular wall 180 and is formed at a position facing the oil separation pipe 52 when the fixed scroll 22 is assembled to the rear housing 14. (See FIG. 12). As shown in FIGS. 10 and 11, the separation chamber 62 has a substantially circular cross section and is formed at a predetermined depth along the axial direction of the rear housing 14. The separation chamber 62 includes first and second introduction passages (communication passages) 182 and 184 in which an annular wall 180 is notched between the discharge chamber 40 and the first and second introduction passages 182, The fluid in the discharge chamber 40 is introduced into the separation chamber 62 through 184. The first and second introduction passages 182 and 184 are formed at a predetermined interval so as to be substantially orthogonal to each other, and are formed so as to be tangential to the inner peripheral surface of the separation chamber 62. Therefore, the fluid introduced from the first and second introduction passages 182 and 184 into the separation chamber 62 flows in the separation chamber 62 while swirling along the inner peripheral surface thereof.

  Further, as shown in FIG. 12, the separation chamber 62 has a lead-out passage 186 formed in a bottom portion 62a spaced from the opening portion on the joint surface 172 side, and the lead-out passage 186 is formed along the axis of the separation chamber 62. It is inclined at a predetermined angle with respect to the joint surface 172. Specifically, the lead-out passage 186 has one end connected to a boundary portion with the inner peripheral surface that is vertically downward in the bottom 62a, and extends in a state inclined downward from the bottom 62a by a predetermined angle, The other end is open to the first boundary wall 174 of the joint surface 172 (see FIG. 10). That is, the inside of the separation chamber 62 and the joint surface 172 are in communication with each other through the outlet passage 186. The lead-out passage 186 is connected to the vicinity of the joint portion of the first boundary wall 174 with the annular wall 180.

  As shown in FIGS. 11 and 12, one end portion of the first communication passage 82 of the fixed scroll 22 faces the lead-out passage 186, and the other end portion of the first communication passage 82 faces the oil storage chamber 80. ing.

  Further, a cylinder portion 66 of the oil separation pipe 52 is inserted into the separation chamber 62, and a clearance 188 having a predetermined interval is provided between the cylinder portion 66 and the inner peripheral surface of the separation chamber 62. That is, the fluid introduced from the discharge chamber 40 to the separation chamber 62 flows to the bottom 62a side through the clearance 188 and then to the flange portion 68 side of the oil separation pipe 52 through the passage 70 of the cylindrical portion 66. And is led out to the second recess 54 via the groove 76 of the oil separation pipe 52.

  The oil storage chamber 80 is provided on the lower side of the rear housing 14, and is formed at a position facing the fourth recess 58 of the fixed scroll 22 when the fixed scroll 22 is assembled to the rear housing 14.

  Further, as shown in FIG. 13, a filter chamber 88 to which a filter 86 capable of removing dust and the like in the lubricating oil is attached is provided at the lower portion of the oil storage chamber 80, and the filter chamber 88 is arranged in the axial direction. It is formed in a bottomed shape with a predetermined depth along. The filter chamber 88 is formed independently of the oil storage chamber 80.

  The filter 86 includes a filter member 190 formed in a cylindrical shape and having a mesh formed in a mesh shape, and a holding case 192 that holds the filter member 190 and attaches it to the filter chamber 88. As shown in FIG. 10, the lubricating oil communicates with the filter chamber 88 through a pair of third and fourth introduction passages 194 a and 194 b formed between the filter chamber 88 and the oil storage chamber 80. Then, when the lubricating oil passes from the outer peripheral side to the inner peripheral side of the filtering member 190, dust (for example, iron powder) contained in the lubricating oil is removed. At this time, the dust is held inside the filter chamber 88 formed in a bottomed shape.

  As shown in FIG. 13, the depth D3 of the third and fourth introduction passages 194a, 194b is formed shallower than the depth D4 along the axial direction of the filter chamber 88 (D3 <D4). The depth of the third and fourth introduction passages 194a, 194b on the oil storage chamber 80 side is formed shallower than the depth of the third and fourth introduction passages 194a, 194b on the filter chamber 88 side. This prevents dust or the like that has entered the filter chamber 88 from returning to the oil storage chamber 80 through the third and fourth introduction passages 194a and 194b, and the depth of the third and fourth introduction passages 194a and 194b. Since the filter chamber 88 side is formed deeper, the dust is guided to the filter chamber 88 side in the third and fourth introduction passages 194a and 194b, and the dust is suitably contained in the filter chamber 88. It becomes possible to collect.

  As shown in FIG. 10, the discharge chamber 64 is formed with a valve hole 64a communicating with the outside on the inner wall surface of the discharge chamber 64. The valve hole 64a discharges the fluid in the discharge chamber 64 to the outside. An open valve 89 is mounted. When the pressure of the fluid in the discharge chamber 64 becomes equal to or higher than a predetermined value, a valve body (not shown) provided in the release valve 89 is opened so that the fluid It is discharged to the outside through the open valve 89.

  Then, when the pressure in the discharge chamber 64 decreases to a desired pressure value, the valve body is closed again, the communication between the discharge chamber 64 and the outside is cut off, and the inside of the discharge chamber 64 The pressure is held at the desired pressure value. That is, the open valve 89 functions as a safety valve that prevents the pressure value in the discharge chamber 64 from becoming excessive.

  On the other hand, the joining surface 172 of the rear housing 14 extends along the outer peripheral portion of the discharge chamber 40 in the joining surface 172 from the vicinity of the filter chamber 88 in which the filter 86 is mounted, as shown in FIG. An oil supply groove 90 extending to the vicinity of the end of the second boundary wall 176 between the discharge chamber 40 and the discharge chamber 64 is formed. The oil supply groove 90 is formed to be recessed from the joint surface 172 by a predetermined depth. Further, as shown in FIG. 11, the oil supply groove 90 is a second communication path formed at one end portion on the back surface 22 a of the fixed scroll 22 when the fixed scroll 22 is assembled to the rear housing 14. A position opposite to one end portion of 84 and the other end portion faces the supply passage 34.

  That is, since the second communication passage 84 is connected to the center of the filter chamber 88 and the oil supply groove 90, the lubricating oil from which dust has been removed in the filter chamber 88 is supplied to the second communication passage 84. The oil flows from the passage 84 to the oil supply groove 90 and is supplied from the supply passage 34 to the oil supply hole 32.

  As shown in FIGS. 11 and 14, the gasket 38 is formed in a shape corresponding to the back surface 22 a of the fixed scroll 22 and the joint surface 172 of the rear housing 14, and is formed in a thin plate shape having a substantially constant thickness. .

  The gasket 38 includes a discharge opening 196 that opens in substantially the same shape as the discharge chamber 40 and an oil storage opening that opens in substantially the same shape as the oil storage chamber 80 when the gasket 38 is brought into contact with the joint surface 172 of the rear housing 14. 198, a discharge opening 200 formed at a position facing the discharge chamber 64, and a separation opening 202 formed at a position facing the separation chamber 62 and blocking a part of the separation chamber 62. A first partition 204 that closes a part of the discharge chamber 64 is formed at a portion adjacent to the discharge opening 200.

  The separation opening 202 is formed so that the cylindrical portion 66 of the oil separation pipe 52 is inserted, and the separation opening 202 has a second partition wall portion that closes the separation chamber 62 on the outer peripheral side of the cylindrical portion 66. (Sealing part) 206 is formed adjacently. Since the diameter of the separation opening 202 is formed to be approximately equal to the outer diameter of the cylindrical portion 66, the separation chamber 62 is closed by the second partition portion 206 after the cylindrical portion 66 is inserted. The means for closing the separation chamber 62 is not particularly limited to the second partition wall portion 206 of the gasket 38, and an O-ring or the like may be provided instead of the second partition wall portion 206.

  In addition, a filter opening 208 having a portion facing the center of the filter 86 is formed at a position facing the filter chamber 88, and a part of the filter chamber 88 is formed on the outer periphery of the filter opening 208. A third partition wall 210 that closes is formed. The third partition wall 210 is disposed so as to contact the end surface of the holding case 192 in the filter 86.

  Further, between the discharge opening 196 and the oil storage opening 198, a throttle hole 212 having a diameter smaller than the passage diameter of the outlet passage 186 is formed at a position facing the outlet passage 186 of the rear housing 14. That is, the outlet passage 186 communicates with the first communication passage 82 through the throttle hole 212 (see FIG. 12). The throttle hole 212 is formed, for example, by punching or the like on the gasket 38, and the diameter of the throttle hole 212 is arbitrarily set according to a desired flow rate to flow through the throttle hole 212.

  On the other hand, as shown in FIG. 14, a second bolt hole 96 facing the first bolt hole 92 of the fixed scroll 22 and the third bolt hole 98 of the rear housing 14 is formed in the outer peripheral portion of the gasket 38. An annular bead (sealing portion) 214 is formed along the outer peripheral portion of the gasket 38 in the radially inward direction from the second bolt hole 96. This bead 214 slightly bulges in the axial direction of the gasket 38, and is formed at the inner peripheral side of the oil supply groove 90 in the rear housing 14, the first and second boundary walls 174 and 176, and the portion facing the annular wall 180, respectively. Has been. Thereby, when the gasket 38 is sandwiched between the fixed scroll 22 and the rear housing 14, the bead 214 can be reliably brought into contact with the fixed scroll 22 and the rear housing 14, It becomes possible to improve the sealing performance.

  The scroll compressor 10 according to the embodiment of the present invention is basically configured as described above. Next, a case where the fixed scroll 22, the gasket 38, and the rear housing 14 are assembled will be described.

  First, the discharge valve 44 and the retainer 46 are mounted on the back surface 22a of the fixed scroll 22 meshed with the movable scroll 24, and the oil separation pipe 52 is mounted in advance on the circular recess 60 via the flange portion 68. State (see FIG. 5). Then, the gasket 38 is attached so that the separation opening 202 of the gasket 38 is inserted into the cylindrical portion 66 of the oil separation pipe 52 with respect to the back surface 22a.

  At this time, as shown in FIG. 11, the discharge opening 196 of the gasket 38 faces the lead-out hole 42 of the fixed scroll 22, the first and third recesses 50 and 56, and the discharge valve 44 and the inside thereof. While the retainer 46 is inserted, the discharge opening 200 faces the second recess 54 and the oil storage opening 198 faces the fourth recess 58.

  Further, the throttle hole 212 of the gasket 38 is opposed to one end portion of the first communication passage 82, and the filter opening 208 is opposed to one end portion of the second communication passage 84.

  Next, in a state where the gasket 38 is attached to the back surface 22 a of the fixed scroll 22, the joint surface 172 of the rear housing 14 is inserted into the gasket so that the oil separation pipe 52 of the fixed scroll 22 is inserted into the separation chamber 62. 38. As a result, the second partition wall portion 206 of the gasket 38 abuts so as to cover the opening of the separation chamber 62 and the separation chamber 62 is closed. Further, since the flange portion 68 of the oil separation pipe 52 is sandwiched via the second partition wall portion 206, the oil separation pipe 52 is held between the fixed scroll 22 and the rear housing 14 via the flange portion 68. The

  At this time, the discharge chamber 40 of the rear housing 14 is opposed to the lead-out hole 42 of the fixed scroll 22 and the first and third recesses 50 and 56 through the discharge opening 196 of the gasket 38, and the separation chamber 62 is the separation opening. While facing the oil separation pipe 52 through 202, the oil storage chamber 80 is located at a position facing the fourth recess 58 through the oil storage opening 198.

  Further, the discharge chamber 64 is opposed to the second recess 54 through the discharge opening 200, and the opening portion of the supply passage 34 is positioned to face one end of the first communication passage 82 through the throttle hole 212. A part of the discharge chamber 64 is covered with the first partition wall portion 204 of the gasket 38.

  Further, the filter chamber 88 is positioned opposite to one end of the second communication passage 84 through the filter opening 208, and the holding case 192 of the filter 86 provided in the filter chamber 88 is covered by the third partition wall 210. It has been broken. Thus, the filter 86 is held in the filter chamber 88 by the pressing force of the fixed scroll 22 in a state where the holding case 192 is pressed by the third partition wall 210.

  Furthermore, one end portion of the oil supply groove 90 is opposed to the other end portion of the second communication passage 84 via the gasket 38, and the other end portion of the oil supply groove 90 is opposed to the supply passage 34.

  Then, the bolt 94 is inserted from the third bolt hole 98 of the rear housing 14 to the gasket 38 side, and the bolt 94 is sequentially inserted into the second bolt hole 96 of the gasket 38 and the first bolt hole 92 of the fixed scroll 22. After that, the rear housing 14, the gasket 38 and the fixed scroll 22 are integrally assembled with the front housing 12 by screwing into the screw holes 100 of the front housing 12. At this time, the oil separation pipe 52 is sandwiched between the second partition wall 206 of the gasket 38 with the flange 68 inserted into the circular recess 60 of the fixed scroll 22, and the It is held between the fixed scroll 22 and the rear housing 14.

  Thus, since the discharge chamber 40, the separation chamber 62, the oil storage chamber 80, the discharge chamber 64, and the filter chamber 88 are all provided so as to be recessed in the axial direction of the rear housing 14, the discharge chamber 40, the separation chamber 62, and the oil storage chamber are provided. When the chamber 80 and the discharge chamber 64 are processed, the processing may be performed only in the same direction from the joint surface 172 side of the rear housing 14, the processing process for the rear housing 14 is shortened, and the production efficiency of the rear housing 14 is reduced. Can be improved.

  The first and second introduction passages 182 and 184 communicating with the discharge chamber 40 and the separation chamber 62, and the third and fourth introduction passages 194a and 194b communicating with the oil storage chamber 80 and the filter chamber 88 are respectively provided in the rear housing. 14 is formed at a position facing the bonding surface 172. On the other hand, a first communication path 82 that communicates the separation chamber 62 and the oil storage chamber 80 and a second communication path 84 that communicates the filter chamber 88 and the oil supply groove 90 are formed on the back surface 22 a of the fixed scroll 22. Yes. Thereby, it is easy to form each passage communicating between the compartments such as the discharge chamber 40 with respect to the back surface 22a of the fixed scroll 22 and the joint surface 172 of the rear housing 14 by processing.

  Further, the oil separation pipe 52 is sandwiched between the fixed scroll 22 and the rear housing 14 via the gasket 38 without providing any special fixing means, and is provided between the fixed scroll 22 and the rear housing 14. The bolt 94 can be held via a tightening force. As a result, it is possible to improve the assembling performance as compared with the conventional scroll type compressor in which the separation tube is screwed and fixed to the rear housing, and to reduce the number of parts and the manufacturing cost. it can.

  Furthermore, by sandwiching a gasket 38 between the back surface 22a of the fixed scroll 22 and the joint surface 172 of the rear housing 14, the compartments and the passages formed in the rear housing 14 and the fixed scroll 22 are simply sealed. One gasket 38 can be securely held.

  Furthermore, when the fixed scroll 22 and the rear housing 14 are connected via the gasket 38, the first and third recesses 50 and 56 that are recessed in the opposite direction to the discharge chamber 40 at positions facing the discharge chamber 40. Therefore, the capacity of the discharge chamber 40 can be easily increased. Similarly, a second recess 54 that is recessed in the opposite direction to the discharge chamber 64 is provided at a position facing the discharge chamber 64. The capacity of the discharge chamber 64 and the oil storage chamber 80 can be increased by providing the fourth recess 58 that is recessed in the opposite direction to the oil storage chamber 80 at a position facing the oil storage chamber 80.

  Next, the operation and effects of the scroll compressor 10 assembled in this way will be described.

  When the rotational force is transmitted to the rotary shaft 116 under the operation of the electromagnetic clutch 160, the support 124 rotates through the second bearing 126, and the pin 128 fixed to the support 124 thereby rotates the rotary shaft 116. It turns in a state that is eccentric with respect to the shaft center.

  Then, the bush 134 rotates through the pin 128 to slide the Oldham ring 144 and its rotation is restricted. Further, since the bush 134 is supported slidably by the sliding contact surface of the thrust plate 142, the movable scroll 24. Turns with respect to the fixed scroll 22 in a state where rotation is restricted.

  As a result, the compression chamber 110 formed between the fixed scroll 22 and the movable scroll 24 is gradually displaced from the outer peripheral portion to the central portion, and the fluid introduced into the suction chamber 104 under the sealing action of the seal member 112. Is gradually compressed. The compressed fluid is led out from the lead-out hole 42 to the discharge chamber 40 by separating the discharge valve 44 from the lead-out hole 42 under the pressure action.

  Next, the fluid is introduced from the discharge chamber 40 into the separation chamber 62 through the first and second introduction passages 182 and 184. At this time, since the fluid is introduced in a tangential direction with respect to the inner peripheral surface of the separation chamber 62, the inside of the clearance 188 between the cylindrical portion 66 of the oil separation pipe 52 and the inner peripheral surface is disposed on the inner peripheral surface. It circulates while turning along. As a result, the lubricating oil contained in the fluid is centrifuged from the fluid by the centrifugal force generated by the swirling flow of the fluid and separated to the inner peripheral surface side.

  The fluid from which the lubricating oil has been separated flows from the clearance 188 between the separation chamber 62 and the cylindrical portion 66 to the flange portion 68 side through the passage 70 of the oil separation pipe 52, and once the second recess of the fixed scroll 22. After being distributed to 54, it is introduced into the discharge chamber 64 of the rear housing 14. As a result, the fluid is discharged to a refrigerant circulation system (not shown) through the discharge port 18 communicating with the discharge chamber 64.

  On the other hand, as shown in FIG. 12, the lubricating oil separated from the fluid flows along the inner peripheral surface of the separation chamber 62 and then moves toward the joint surface 172 through the outlet passage 186 formed in the bottom 62a. The flow rate is reduced to a predetermined amount by the throttle hole 212 of the gasket 38 that flows and faces the outlet passage 186. Then, the oil is introduced and stored in the oil storage chamber 80 of the rear housing 14 through the first communication passage 82 of the fixed scroll 22 facing the throttle hole 212. At this time, since the flow rate of the lubricating oil introduced into the oil storage chamber 80 is reduced by the throttle hole 212 with respect to the flow rate flowing through the outlet passage 186, it can be gradually introduced into the oil storage chamber 80. Thus, the oil level of the lubricating oil in the oil storage chamber 80 can be always kept stable without disturbing the oil level.

  Next, the lubricating oil stored in the oil storage chamber 80 flows to the filter chamber 88 adjacent to the oil storage chamber 80 through a pair of third and fourth introduction passages 194a and 194b, and is provided in the filter chamber 88. The filter member 190 removes dust and the like contained in the lubricating oil. The dust and the like removed by the filter 86 remains inside the filter chamber 88, and thus the dust is prevented from entering the oil storage chamber 80 again.

  Then, the lubricating oil filtered by the filter 86 is supplied to the oil supply groove 90 of the rear housing 14 through the filter opening 208 and the second communication path 84 of the fixed scroll 22, and flows along the oil supply groove 90. As a result, the oil flows into the supply passage 34 connected to the other end of the oil supply groove 90.

  Finally, the lubricating oil is discharged from the supply passage 34 through the oil supply hole 32 into the guide passage 30 and flows along the guide passage 30 to the movable scroll 24 side. At this time, the sliding surface between the movable side substrate portion 106 and the fixed side spiral wall 28 of the movable scroll 24 is supplied, and the sliding surface is lubricated.

  Further, the lubricating oil is gradually stored in the oil storage tank 114 surrounded by the blocking walls 36 provided on both sides of the guide passage 30 and the movable side substrate portion 106 of the movable scroll 24 facing the guide passage 30. Surface height increases. Then, when the end surface of the movable side substrate portion 106 is displaced to a position lower than the oil level height under the turning action of the movable scroll 24 (see the two-dot chain line shape in FIG. 4), the lubricating oil is moved to the movable side. It passes over the board portion 106 and flows along the outer wall surface of the movable scroll 24 toward the bush 134 and the rotary shaft 116. Thereby, the bush 134, the rotating shaft 116, and the like are lubricated by the lubricating oil.

  As described above, in the present embodiment, the oil separation pipe 52 having the cylindrical portion 66 and the flange portion 68 is sandwiched between the fixed scroll 22 and the rear housing 14 via the flange portion 68, and The fixed scroll 22 and the rear housing 14 are held by using a tightening force when the bolt 94 is joined. This eliminates the need for fixing means for firmly fixing the oil separation pipe 52 between the fixed scroll 22 and the rear housing 14, and allows the oil separation pipe 52 to be easily assembled. Therefore, the number of parts and the manufacturing cost can be reduced as compared with the conventional scroll compressor, and the assembling property can be improved.

  Further, when the pressure of the fluid introduced into the separation chamber 62 is applied to the oil separation pipe 52, the flange portion 68 of the oil separation pipe 52 is sandwiched between the fixed scroll 22 and the rear housing 14. Since the surface is in surface contact with the circular recess 60 of the fixed scroll 22 and the gasket 38, the pressure is applied to the contact surface of the fixed scroll 22 through the flange portion 68, and the oil separation is performed. The load from the pressure on the pipe 52 can be reduced. Therefore, the strength of the oil separation pipe 52 can be designed to be smaller than that of the separation pipe in the conventional scroll compressor, and the manufacturing cost of the oil separation pipe 52 can be reduced accordingly.

  Further, the gasket 38 is provided between the rear housing 14 and the fixed scroll 22 and is formed in a thin plate shape along the axial direction, and a second partition as a sealing portion at a position facing the separation chamber 62 in the gasket 38. A unit 206 is provided. Thereby, the gasket 38 can seal the rear housing 14 and the fixed scroll 22 at the same time, and can seal the separation chamber 62 by the second partition wall portion 206 at the same time. Therefore, it is not necessary to separately provide a sealing member for sealing only the separation chamber as in the conventional scroll compressor, and all the seals between the back surface 22a of the fixed scroll 22 and the joint surface 172 of the rear housing 14 are provided. This can be done with a single gasket 38. Therefore, it is possible to improve the assembling property of the gasket 38 to the rear housing 14 and the fixed scroll 22, and it is possible to reduce the number of parts and the manufacturing cost in the scroll compressor 10.

  Further, a circular recess 60 capable of accommodating the flange portion 68 of the oil separation pipe 52 is formed on the back surface 22 a of the fixed scroll 22, and the depth dimension of the circular recess 60 is substantially the same as the height dimension of the flange portion 68. Yes. For this reason, when the flange portion 68 is inserted into the circular recess 60, the end surface of the flange portion 68 does not protrude with respect to the back surface 22a, and the end surface and the back surface 22a are substantially flush with each other. Can do. As a result, the gasket 38 abutted against the back surface 22a can be formed into a thin plate-like simple shape, so that the processing of the gasket 38 is facilitated and its productivity can be improved. Further, since the back surface 22a of the fixed scroll 22 is substantially flat, the single gasket 38 is brought into abutment with the back surface 22a and the end surface of the flange portion 68 reliably and preferably, so that the space between the fixed scroll 22 and the rear housing 14 is improved. The sealing performance can be improved.

  Furthermore, by making the back surface 22a of the fixed scroll 22 with which the gasket 38 abuts into a substantially flat shape, it is possible to suppress variations in sealing performance due to processing errors and the like when the back surface 22a is processed.

  Furthermore, the annular wall 180 between the discharge chamber 40 and the separation chamber 62 is provided with first and second introduction passages 182 and 184 that open to the joint surface 172 side and communicate with the discharge chamber 40 and the separation chamber 62. By providing, the said 1st and 2nd introduction channel | paths 182 and 184 can be simply processed with respect to the annular wall 180 from the said joint surface 172 side. Therefore, it is not necessary to form a passage through which fluid flows from the discharge chamber 40 to the separation chamber 62, for example, in the rear housing 14 through hole machining or the like, and the first and second introduction passages function as the passage. The number of processing steps when forming 182 and 184 can be reduced. Further, since the first and second introduction passages 182 and 184 are formed in the annular wall 180 so as to be recessed from the joint surface 172, the first and second introduction passages 182 and 184 do not protrude from the joint surface 172, and the joint surface 172 is planar. Can be maintained. Therefore, the sealing performance by the gasket 38 attached to the joint surface 172 is suitably maintained.

  A second recess 54 that communicates with the circular recess 60 is provided on the back surface 22 a of the fixed scroll 22, and when the fixed scroll 22 and the rear housing 14 are joined, the second recess 54 is formed on the rear housing 14. The discharge chamber 64 and the discharge port 18 are communicated. Thereby, compared with the case where the second recessed portion 54 for communicating between the discharge chamber 64 and the discharge port 18 and the circular recessed portion 60 is formed in the fixed scroll 22 by drilling or the like, the rear surface 22 a It can be processed easily. Therefore, it is possible to reduce the processing man-hour when forming the second concave portion 54 functioning as a fluid discharge passage, and the inside required for forming the second concave portion 54 inside the fixed scroll 22. Since no space is required, the fixed scroll 22 can be downsized.

  Further, a groove portion 76 is formed in the flange portion 68 of the oil separation pipe 52 so as to face the second recess portion 54 through the circular recess portion 60 and is recessed toward the tube portion 66 side. It communicates with the passage 70 of the portion 66. Therefore, when the fluid introduced into the separation chamber 62 flows into the groove portion 76 through the passage 70, the groove portion 76 can function as a part of the second concave portion 54 serving as a discharge passage. Therefore, without increasing the processing time and the processing amount (for example, the depth D2 of the second concave portion 54) when forming the second concave portion 54 on the back surface 22a of the fixed scroll 22, the second concave portion 54 serving as the discharge passage is not increased. The channel area can be easily increased.

  Furthermore, an engagement groove 72 that is recessed radially inward from the peripheral surface thereof is formed in the flange portion 68, and an engagement protrusion 74 that protrudes radially inward is formed in the circular recessed portion 60 to form the engagement groove. 72 and the engaging protrusion 74 are engaged. Thus, the flange portion 68 is not rotationally displaced in the circular recess 60, and the oil separation pipe 52 is reliably positioned with respect to the fixed scroll 22, and the assembling property of the oil separation pipe 52 can be improved. it can. The engagement groove 72 and the engagement protrusion 74 function as a rotation restricting unit that restricts the rotational displacement of the oil separation pipe 52.

  Further, the groove portion 76 of the flange portion 68 is prevented from being displaced with respect to the position where it communicates with the second concave portion 54 due to the rotational displacement of the flange portion 68, and the groove portion 76 and the second concave portion 54 are always in a communicating state. It can be.

DESCRIPTION OF SYMBOLS 10 ... Scroll type compressor 12 ... Front housing 14 ... Rear housing 16 ... Intake port 18 ... Discharge port 22 ... Fixed scroll 22a ... Back surface 24 ... Movable scroll 26 ... Fixed side board | substrate part 28 ... Fixed side spiral wall 30 ... Guide path 32 ... oil supply hole 34 ... supply passage 36 ... dam wall 38 ... gasket 40 ... discharge chamber 42 ... outlet hole 44 ... discharge valve 52, 52a ... oil separation pipe 60 ... circular recess 62 ... separation chamber 64 ... discharge chamber 66 ... cylinder part 68 ... Flange portion 70 ... passage 72 ... engagement groove 74 ... engagement protrusion 76 ... groove portion 78 ... fixing bolt 80 ... oil storage chamber 82 ... first communication passage 84 ... second communication passage 86 ... filter 88 ... filter chamber 90 ... Oil supply groove 106 ... movable side substrate 108 ... movable side spiral wall 110 ... compression chamber 116 ... rotating shaft 124 ... support 128 ... pin 134 ... bush 158 ... pulley 160 ... Electromagnetic clutch 172 ... joint surface 186 ... leading passage 204 ... first partition part 206 ... second partition part 208 ... filter opening 210 ... third partition part 212 ... throttle hole 214 ... bead

Claims (7)

A discharge chamber formed between a fixed scroll and a housing and from which a fluid compressed under the swirling action of a movable scroll meshed with the fixed scroll is led out, and is contained in the fluid in communication with the discharge chamber. In a scroll compressor comprising a separation chamber that separates the lubricating oil, and an oil storage chamber that communicates with the separation chamber and stores the lubricating oil.
A dividing wall formed in the housing and extending along the axial direction of the housing to divide the discharge chamber and the separation chamber, respectively;
An oil separation member having a pipe portion inserted into the separation chamber and a flange portion formed at an end of the pipe portion, and distributing the fluid and lubricating oil in the separation chamber;
With
The scroll compressor, wherein the flange portion is sandwiched between the fixed scroll and the housing through a clamping force when the fixed scroll and the housing are joined. The scroll compressor according to claim 1, wherein
A concave portion capable of accommodating the flange portion is formed on a joint surface of the fixed scroll joined to the housing, and a depth dimension of the concave portion is set to be substantially the same as a height dimension of the flange portion. Scroll type compressor. The scroll compressor according to claim 2,
The dividing wall between the discharge chamber and the separation chamber is provided with a communication passage that opens to the joint surface side of the housing and communicates the discharge chamber and the separation chamber, and the fluid is discharged to the discharge chamber through the communication passage. Scroll compressor characterized in that it circulates to the separation chamber. The scroll compressor according to claim 2 or 3,
The joint surface of the fixed scroll has a discharge passage formed along the joint surface and communicated with the recess, and the discharge passage is formed in the housing when the fixed scroll and the housing are joined. A scroll compressor that communicates with a discharge port that discharges the fluid to the outside. The scroll compressor according to claim 4, wherein
The scroll compressor, wherein the flange portion is provided with a groove portion facing the discharge passage through the recess and communicating with the tube portion and recessed toward the tube portion. The scroll compressor according to claim 5, wherein
A scroll type compressor is provided between the flange portion and the concave portion, wherein a rotation regulating means for regulating rotational displacement of the flange portion in the circumferential direction in the concave portion is provided. The scroll compressor according to claim 4 or 5,
The scroll compressor is characterized in that the discharge passage is formed deeper than the contact surface of the recess with which the flange portion contacts, and is formed to face the tube portion.

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