CN111425402B

CN111425402B - Thrust plate for scroll compressor and scroll compressor

Info

Publication number: CN111425402B
Application number: CN201910019904.1A
Authority: CN
Inventors: 张跃; 缪仲威; 范忆文
Original assignee: Gulun Environmental Technology Suzhou Co ltd
Current assignee: Gulun Environmental Technology Suzhou Co ltd
Priority date: 2019-01-09
Filing date: 2019-01-09
Publication date: 2024-08-23
Anticipated expiration: 2039-01-09
Also published as: CN111425402A

Abstract

A thrust plate (100) for a scroll compressor (10) and a scroll compressor (10) including the thrust plate are disclosed. The thrust plate (100) includes a thrust surface (110) at a first face of the thrust plate (100); an annular oil groove (102) located on a second face (130) of the thrust plate (100) opposite the first face; a plurality of oil supply through holes (104) extending from a bottom of the annular oil groove (102) through the thrust plate (100) and to the thrust surface (110). The thrust plate can supply oil more efficiently without damaging the thrust surface.

Description

Thrust plate for scroll compressor and scroll compressor

Technical Field

The present invention relates to a thrust plate for a scroll compressor and a scroll compressor including the same.

Background

In scroll compressors, compression of fluid is achieved by relative movement between an orbiting scroll member and a non-orbiting scroll member. In order to provide axial support to the orbiting scroll member, a thrust plate is provided on the end plate side of the orbiting scroll member. Sufficient lubrication is required between the contact surfaces (thrust surfaces) between the end plates and thrust plates of the orbiting scroll member to reduce friction and wear therebetween. At present, the lubricating structure adopted between the end plate of the movable vortex component and the thrust surface of the thrust plate has the defects of complex structure, insufficient lubrication or serious abrasion of the thrust surface.

Accordingly, the inventors of the present invention have recognized a need for a more efficient oil supply for a scroll compressor without damaging the thrust surface oil passage arrangement.

Disclosure of Invention

One or more embodiments of the present invention may provide a thrust plate capable of more efficiently supplying lubricating oil to a thrust surface without damaging the thrust surface, and a scroll compressor including the thrust plate.

One or more embodiments of the present invention provide a thrust plate for a scroll compressor including a thrust surface on a first face of the thrust plate; an annular oil groove located on a second face of the thrust plate opposite the first face; a plurality of oil supply through holes extend from a bottom of the annular oil groove through the thrust plate and to the thrust surface. By adopting the multiple oil supply through holes and the arrangement of arranging the annular oil grooves on the opposite side of the thrust surface, the lubricating oil can be supplied more efficiently without damaging the thrust surface.

Further, the thrust plate further includes a plurality of stops disposed in the annular oil groove, the plurality of stops spacing the annular oil groove into a plurality of oil storage areas and each oil storage area including one or more oil supply through holes, thereby further forcing the circumferentially rotating lubricating oil into the oil holes.

Further, the stopper includes an upper surface that is perpendicular to the inner side surface, the outer side surface of the annular oil groove and is lower than or flush with the second face of the thrust surface.

Further, the oil storage area is an area surrounded by an inner side surface of the annular oil groove, an outer side surface of the annular oil groove, a bottom surface of the annular oil groove, a stop surface of the stop portion facing the inner side of the oil storage area, and a guide surface located between an upper surface of an adjacent stop portion and the bottom surface.

Further, the bottom surface is provided at the deepest portion of the oil storage area and the oil supply through hole is provided at the bottom surface.

Further, the stopper surface extends from the upper surface of the stopper portion toward the bottom surface in a direction perpendicular to the upper surface, thereby facilitating blocking of the lubricant entering the annular oil groove, forcing the lubricant into the oil supply through hole.

Further, the stop surface is an arc surface.

Further, the guide surface smoothly transitions from the upper surface of the adjacent stopper to the bottom surface, thereby facilitating the guiding of the lubricating oil into the oil supply through hole.

Further, the guide surface is an inclined surface or an arc surface.

Further, the oil outlet of the oil supply through hole is located near the radially inner side of the thrust surface, so that lubrication of the surface of the thrust surface near the radially inner side can be enhanced in a targeted manner to avoid wear thereof.

Further, the oil outlet of the oil supply through hole is located near the radially outer side of the thrust surface, so that lubrication of the surface of the thrust surface near the radially inner side can be enhanced in a targeted manner to avoid wear thereof.

Further, each oil storage area comprises two oil supply through holes, and oil outlets of the oil supply through holes are respectively positioned at the position close to the radial inner side and the radial outer side of the thrust surface, so that lubrication of the surfaces of the thrust surface close to the position close to the inner side and the radial outer side can be enhanced simultaneously, and abrasion of the surfaces can be avoided.

Further, the oil supply through hole is inclined in the circumferential direction from the second face of the thrust plate toward the first face of the thrust plate, so that the lubricating oil accumulated in the annular oil groove can easily flow to the thrust surface by the rotational dynamic pressure.

Further, the oil supply through hole is cylindrical or conical in shape.

One or more embodiments of the present invention provide a scroll compressor including the thrust plate described above.

Further, the scroll compressor further includes: a housing, a fixed scroll member and an movable scroll member disposed in the housing for compressing a refrigerant, a bearing housing fixedly disposed on the housing, a driving shaft rotatably supported by the bearing housing and driving the movable scroll member, a weight fixed to the driving shaft and rotated together with the driving shaft, wherein the thrust plate is fixed to the bearing housing and the thrust surface abuts against an end plate of the movable scroll member, the weight is located in a space formed between the thrust plate and the bearing housing, and an annular oil groove of the thrust plate faces the weight.

Drawings

The features and advantages of one or more embodiments of the invention will become more readily apparent from the following description with reference to the accompanying drawings, in which:

FIG. 1 is a perspective cross-sectional view of an orbiting scroll member according to a first comparative example of the present invention;

FIG. 2 is a perspective cross-sectional view of an orbiting scroll member according to a second comparative example of the present invention;

Fig. 3 is a sectional view of a scroll compressor according to a first embodiment of the present invention;

fig. 4A is a front view of a thrust plate according to a first embodiment of the present invention, fig. 4B is a rear view of the thrust plate, and fig. 4C is a perspective view of the thrust plate;

fig. 5A is a perspective view of a thrust plate in which an oil outlet hole of an oil supply through hole is located near the radially inner side of a thrust surface according to a second embodiment of the present invention;

FIG. 5B is a cross-sectional view of FIG. 5A taken from the oil supply passage;

fig. 6 is a perspective view of a thrust plate according to a third embodiment of the present invention, in which an oil outlet hole of an oil supply through hole is located near the radially outer side of a thrust surface;

Fig. 7A is a perspective view of a thrust plate according to a fourth embodiment of the present invention, in which an oil outlet hole of an oil supply through hole is located near the radially inner side and near the radially outer side of a thrust surface;

FIG. 7B is a cross-sectional view of FIG. 7A taken from the oil supply through hole; and

Fig. 8 is an enlarged view of the vicinity of a thrust plate of the scroll compressor according to the first embodiment of the present invention.

Detailed Description

Fig. 1 shows a first comparative example with respect to an embodiment of the present invention. The first comparative example shown in fig. 1 discloses an orbiting scroll member 1 for a scroll compressor, the orbiting scroll member 1 including an end plate 11, an oil inlet hole 13, a cross hole 15, an oil outlet hole 16 provided on the end plate 11, and an annular oil groove 18 provided on a thrust surface 17 of the orbiting scroll member 1. Lubricating oil enters from the oil inlet hole 13 and flows along the lateral hole 15, then flows from the oil outlet hole 16 into the annular oil groove 18, and finally overflows from the annular oil groove 18 to lubricate the thrust surface 17 of the end plate 11 of the orbiting scroll member 1 and the thrust surface (not shown) of the thrust plate supporting the thrust surface 17 of the end plate 11 when the scroll compressor is operated.

In the first comparative example, since the annular oil groove is provided on the thrust surface of the orbiting scroll member, both edge edges of the annular oil groove are liable to cause stress concentration, and edge defects thereof such as burrs and the like may damage the thrust surface of the thrust plate in close contact with the thrust surface of the orbiting scroll member. In addition, the oil circuit is long in oil supply road, and is not direct, so that the oil supply quantity is small, the thrust surface is not sufficiently lubricated, and the abrasion is serious.

Fig. 2 shows a second comparative example modified on the basis of the first comparative example. In the second comparative example, one oil supply passage is added to supply double the lubrication oil to the annular oil groove 16, as compared with the first comparative example. However, this comparative example still has the disadvantage that the edge of the annular oil groove easily breaks the thrust surface of the thrust plate and the oil supply passage is long and the oil supply is insufficient. In addition, similar to the first and second comparative examples, the other comparative examples in which only the positions of the annular oil groove and the oil supply passage were changed, i.e., the annular oil groove was provided on the thrust surface of the thrust plate and the oil supply passage was provided in the middle of the thrust plate, respectively, also had similar drawbacks as described above.

The following is a description of preferred embodiments in accordance with the invention, which are merely exemplary in nature and are in no way intended to limit the invention, its application, or uses.

I. Basic structure of vortex compressor

The basic construction of a scroll compressor according to an embodiment of the present invention will now be described with reference to fig. 3.

A scroll compressor (hereinafter referred to simply as a "scroll compressor" or "compressor") 10 includes a generally cylindrical housing 12. An intake fitting (not shown) is provided on the housing 12 for sucking low-pressure gaseous refrigerant. An end cap 14 is fixedly connected to one end of the housing 12. The end cap 14 is equipped with a discharge fitting for discharging the compressed refrigerant. A partition 16 extending transversely with respect to the housing 12 is also provided between the housing 12 and the end cover 14 to divide the interior space of the compressor into a high pressure side and a low pressure side. The space between the end cap 14 and the diaphragm 16 constitutes a high pressure side space, while the space between the diaphragm 16 and the housing 12 constitutes a low pressure side space.

The housing 12 houses the orbiting scroll member 20 and the non-orbiting scroll member 30 as compression mechanisms, and the motor 40 and the drive shaft 50 as drive mechanisms. The compression mechanism may be driven by a drive mechanism and supported by a bearing housing 70. Bearing sleeve 70 may be secured to housing 12 at a plurality of points in any desired manner, such as by staking.

The orbiting scroll member 20 includes an end plate 22 having a scroll wrap 24 provided on one surface (upper surface in fig. 3) of the end plate 22 and a cylindrical hub 26 provided on the other surface (lower surface in fig. 3). The non-orbiting scroll member 30 includes an end plate 32 and a scroll wrap 34. The wraps 24 and 34 of the orbiting and non-orbiting scroll members 20 and 30 are engaged and a fluid chamber having a gradually decreasing outer to central volume is formed therebetween upon relative movement of the orbiting and non-orbiting scroll members 20 and 30 to compress refrigerant in the fluid chamber.

The motor 40 includes a stator 42 and a rotor 44. The stator 42 is fixedly coupled to the housing 12. The rotor 44 is fixedly connected to the drive shaft 50 and rotates in the stator 42.

The first end (upper end in fig. 3) of the drive shaft 50 is provided with an eccentric crank pin 52 and a counterweight 62. The weight 62 is fixedly provided on the drive shaft 50 so as to be integrally rotatable with the drive shaft 50 when the drive shaft 50 rotates. An upper side portion of the drive shaft 50 is rotatably supported by bearings in the bearing housing 70. The counterweight 62 is located in a bearing housing 70. The second end (lower end in fig. 3) of the drive shaft 50 may include a concentric bore 54. The concentric bore 54 leads to the eccentric crankpin 52 at the first end of the drive shaft 50 via the eccentric bore 56.

The eccentric crank pin 52 of the drive shaft 50 is inserted into the hub 26 of the orbiting scroll member 20 via a bushing 58 to rotatably drive the orbiting scroll member 20. As the orbiting scroll member 20 moves relative to the non-orbiting scroll member 30, the fluid pockets between the orbiting scroll member 20 and the non-orbiting scroll member 30 move from a radially outer position to a central position of the orbiting scroll member 20 and the non-orbiting scroll member 30 and are compressed. The compressed fluid is discharged through a discharge port 36 provided in the center of the end plate 32 of the non-orbiting scroll member 30.

In order to prevent axial movement of the orbiting scroll member 20, a thrust plate 100 is provided between the orbiting scroll member 20 and the bearing housing 70 such that the counterweight 62 is positioned between the thrust plate 100 and the bearing housing 70. Thrust plate 100 may be secured to bearing housing 70. Thrust plate 100 has a thrust surface 110 as a first face and a second face 130 opposite the first face, wherein thrust surface 110 of thrust plate 100 contacts thrust surface 28 of end plate 22 of orbiting scroll member 20 to thereby inhibit axial movement of orbiting scroll member 20. During rotation of drive shaft 50, relative movement may occur between thrust surface 28 of end plate 22 of orbiting scroll member 20 and thrust surface 110 of thrust plate 100, and thus sufficient lubrication between the two thrust surfaces 28 and 110 is required to reduce the frictional forces therebetween to prevent seizure or excessive wear of the two. The detailed construction of the thrust plate 100 will be described below.

The ends of the concentric bore 54 are immersed in or otherwise supplied with lubrication oil at the bottom of the compressor housing. In one example, a lubrication oil supply, such as an oil pump or a fork, may be provided in or near the concentric bore 54. During operation of the compressor, one end of the concentric bore 54 is supplied with lubricating oil by the lubricating oil supply means, and the lubricating oil entering the concentric bore 54 is pumped or thrown into the eccentric bore 56 by centrifugal force during rotation of the drive shaft 50 and flows up along the eccentric bore 56 up to the end of the eccentric crankpin 52, thereby lubricating the gap between the eccentric crankpin 52, the bushing 58 and the hub 26 of the orbiting scroll member 20, and is supplied to the thrust surface 28 and the thrust surface 110 through a lubricating oil passage provided in the thrust plate 100 to be described later.

III Structure of thrust plate

A thrust plate according to a first embodiment of the present invention is described in detail below with reference to fig. 4A to 4C. Fig. 4A to 4C are diagrams of a thrust plate according to a first embodiment of the present invention, fig. 4A is a front view of the thrust plate, fig. 4B is a rear view of the thrust plate, and fig. 4C is a perspective view of the thrust plate.

As shown in fig. 4A-4C, thrust plate 100 includes a thrust surface 110 at a first face of thrust plate 100, an annular oil groove 102 at a second face 130 of thrust plate 100 opposite the first face, and a plurality of oil supply through holes 104 extending through thrust plate 100 from a bottom of annular oil groove 102 and reaching thrust surface 110.

A plurality of oil feed through holes 104 extend through thrust plate 100 from a lower portion of annular oil groove 102 to thrust surface 110, and a plurality of oil outlets 106 are formed on thrust surface 110. The plurality of oil outlets 106 may be arranged to be evenly distributed in the circumferential direction. Preferably, the oil supply through hole 104 is formed to be inclined in the circumferential direction from the rear face toward the front face of the thrust plate 100, so that the lubricating oil accumulated in the annular oil groove 102 can easily flow to the thrust surface 110 by the rotational dynamic pressure. The oil supply passage 104 may be cylindrical in shape. Preferably, the oil supply passage 104 may also be conical in shape with the smaller diameter end being the oil outlet 106, thereby allowing the lubricating oil to more easily flow along the tapered shape to the thrust surface 110.

As shown in fig. 4C, the annular oil groove 102 is located at the back of the thrust plate 100, and a plurality of stoppers 120 provided in the annular oil groove 102 partition the annular oil groove 102 into a plurality of oil storage areas 108 and each oil storage area 108 includes one oil supply through hole 104. Preferably, the oil storage areas 108 may also include a plurality of oil supply through holes 104 to allow more lubrication oil from each oil storage area 108 to flow to the thrust surface 110. The stopper 120 includes an upper surface 1201, the upper surface 1201 being perpendicular to the inner side 1021, outer side 1022 of the annular oil groove 102 and being lower than the upper edges of the inner side 1021, outer side 1022 of the annular oil groove 102. The oil storage region 108 is a region surrounded by an inner side 1021 of the annular oil groove 102, an outer side 1022 of the annular oil groove 102, a bottom 1081, a stop surface 1082 of the stop 120 facing the oil storage region, and a guide surface 1083 of the oil storage region. The guide surface 1083 smoothly and obliquely transitions from the upper surface 1201 of the adjacent stopper 120 to the bottom surface 1081 located near the oil supply through hole, thereby facilitating the guiding of the lubricating oil into the oil supply through hole 104. The stop surface 1082 extends from the upper surface 1201 of the stop portion 120 toward the bottom surface 1081 in a direction perpendicular to the upper surface 1201, thereby facilitating blocking of the lubrication oil entering the annular oil groove 102 to force the lubrication oil into the oil supply through hole 104. Preferably, to achieve a better lubricant gathering effect, the stop surface 1082 is an arc surface partially surrounding the oil supply through hole. Preferably, the guide surface 1083 may be a beveled or rounded surface. Preferably, the annular oil groove 102 has a chamfer or rounded transition between the inner side 1021, the outer side 1022, and the stop and bottom surfaces 1082, 1081, and a chamfer or rounded transition between the upper surface of the stop 120 and the guide surface 1083. For ease of machining, the oil reservoir region 108 may be formed by milling the lower portion of material from the back side of the shaped thrust plate using a milling tool. Preferably, the oil reservoir region 108 may also be formed directly on the thrust plate 100 during the molding process of the thrust plate 100.

Preferably, as shown in fig. 5A and 5B, the oil outlet 106 of the oil supply through hole 104 may be disposed near the radially inner side of the thrust surface 110, so that lubrication of the surface of the thrust surface 110 near the radially inner side may be purposefully enhanced to avoid abrasion of the surface of the thrust surface 110 near the radially inner side. Preferably, according to the third embodiment of the present invention as shown in fig. 6, the oil outlet 106 of the oil supply through hole 104 may be provided near the radially outer side of the thrust surface 110, so that lubrication of the surface of the thrust surface 110 near the radially outer side may be purposefully enhanced to avoid abrasion of the surface of the thrust surface 110 near the radially outer side. Preferably, as shown in fig. 7A and 7B, the oil outlet 106 of the oil supply through hole 104 may also be provided at the same time at the vicinity of the radially inner side and the vicinity of the radially outer side of the thrust surface 110, so that lubrication of the surfaces of the thrust surface 110 at the vicinity of the radially inner side and the vicinity of the radially outer side may be enhanced at the same time. In this embodiment, two oil supply through holes may branch from one opening at the bottom of the oil supply region into two passages, leading to the two oil outlet holes, respectively; it is also possible to provide a plurality of oil supply through holes which do not intersect in one oil storage area in the back annular oil groove of the thrust plate. Preferably, the plurality of oil outlets 106 may also be disposed more in locations where the user wants to enhance lubrication, depending on the failure conditions, the location of wear, and the location where the user intends to enhance lubrication.

Lubrication process of thrust surface

The lubrication process of the thrust surface of the scroll compressor according to one embodiment of the present invention is described below with reference to fig. 8.

As shown in fig. 8, the lubricating oil from the eccentric hole 56 of the drive shaft 50 first reaches the end of the eccentric crankpin 52, and then enters and collects in the space S between the bearing housing 70 and the thrust plate 100 via the gap between the eccentric crankpin 52, the bushing 58, and the hub 26 of the orbiting scroll member 20. As described above, the weight 62 is fixedly provided at one end of the drive shaft 50 and is located between the thrust plate 100 and the bearing housing 70, i.e., in the space S. As the drive shaft 50 rotates, the weight 62 fixedly provided at one end of the drive shaft also rotates. Since the annular oil groove 102 on the back surface of the thrust plate 100 faces the weight 62 when the weight 62 is mounted, when the weight 62 rotates, the lubricating oil accumulated in the space S, particularly at the bottom of the space S, is agitated by the weight 62 and splashed by centrifugal force in a plurality of oil storage areas 108 (shown in fig. 4C) separated by the stopper 120 (shown in fig. 4C) in the annular oil groove 102 on the back surface of the thrust plate 100 and accumulated therein. Since the bottom surface of the oil storage region is provided with the inclined guide surface, the lubricating oil flows from one end of the oil storage region along the guide surface to gather at the deeper end of the oil storage region 108 where the oil supply through hole is provided, and at the same time, the lubricating oil is continuously accumulated upward in the oil storage region 108 due to being blocked by the stopper 120, is forced to flow from the back surface of the thrust plate 100 onto the thrust surface 110 on the front surface of the thrust plate 100 through the plurality of oil supply through holes 104 (shown in fig. 4C) while rotating circumferentially, and further flows out through the plurality of oil outlets 106 (shown in fig. 4C) on the thrust surface 110, thereby lubricating the entire thrust surface 110. For ease of understanding, in fig. 8, the movement route of the lubricating oil is schematically represented by an arrow.

The thrust plate of one or more embodiments of the present invention may have the following beneficial effects: (1) The centrifugal force of the counterweight and the rotary dynamic pressure of the lubricating oil are utilized, so that the lubricating oil is supplied more simply and reliably, and the load of components such as an oil pump and the like is not increased or is less increased; (2) The damage to the thrust surface caused by the arrangement of the annular oil groove on the thrust surface is avoided; (3) The oil is supplied by utilizing the plurality of oil supply through holes, so that the oil supply quantity is larger, more uniform and more efficient.

Although various embodiments of the present invention have been described in detail herein, it is to be understood that the invention is not limited to those precise embodiments described and shown herein, and that other modifications and variations may be effected by one skilled in the art without departing from the spirit or scope of the invention. All such modifications and variations are intended to be within the scope of the present invention. Moreover, all the components described herein may be replaced by other technically equivalent elements.

Claims

1. A thrust plate (100) for a scroll compressor (10), comprising:

a thrust surface (110) located on a first side of the thrust plate (100);

An annular oil groove (102) located on a second face (130) of the thrust plate (100) opposite the first face; and

A plurality of oil supply through holes (104) extending from the bottom of the annular oil groove (102) through the thrust plate (100) and reaching the thrust surface (110),

Wherein an oil outlet (106) of the oil supply through hole (104) is positioned on the thrust surface (110) and lubricating oil flowing out of the oil outlet (106) directly lubricates the thrust surface (110).

2. The thrust plate (100) of claim 1, wherein the thrust plate (100) further includes a plurality of stops (120) disposed in the annular oil groove (102), the plurality of stops (120) spacing the annular oil groove (102) into a plurality of oil storage areas (108) and each oil storage area (108) including one or more oil supply through holes (104).

3. The thrust plate (100) of claim 2, wherein the stop (120) includes an upper surface (1201), the upper surface (1201) being perpendicular to an inner side (1021), an outer side (1022) of the annular oil groove (102) and below a second face (130) of the thrust surface (110) or flush with a side edge of the second face (130).

4. A thrust plate (100) according to claim 3, wherein the oil storage region (108) is an area surrounded by an inner side surface (1021) of the annular oil groove (102), an outer side surface (1021) of the annular oil groove (102), a bottom surface (1081) of the annular oil groove (102), a stop surface (1082) of the stop portion (120) facing inward of the oil storage region (108), and a guide surface (1083) located between an upper surface of an adjacent stop portion and the bottom surface (1081).

5. The thrust plate (100) of claim 4, wherein the oil supply through hole (104) is provided at the bottom surface (1081).

6. The thrust plate (100) of claim 4, wherein the stop surface (1082) extends from an upper surface (1201) of the stop (120) toward the bottom surface (1081) in a direction perpendicular to the upper surface (1201).

7. The thrust plate (100) of claim 6, wherein the stop surface (1082) is an arcuate surface that partially surrounds the oil supply through hole (104).

8. The thrust plate (100) of claim 4, wherein the guide surface (1083) smoothly transitions from an upper surface (1201) of an adjacent stop (120) to the bottom surface (1081).

9. The thrust plate (100) of claim 8, wherein the guide surface (1083) is a chamfer or an arc surface.

10. The thrust plate (100) of any one of claims 1-9, wherein an oil outlet (106) of the oil supply through hole (104) is located near a radially inner side of the thrust surface (110).

11. The thrust plate (100) of any one of claims 1-9, wherein an oil outlet (106) of the oil supply through hole (104) is located near a radially outer side of the thrust surface (110).

12. The thrust plate (100) of any one of claims 2-9, wherein each oil storage region (108) comprises two of the oil supply through holes (104), oil outlets (106) of the oil supply through holes (104) being located near a radially inner side and near a radially outer side of the thrust surface (110), respectively.

13. The thrust plate (100) of any one of claims 1-9, wherein the oil supply through hole (104) is inclined in a circumferential direction from the second face (130) of the thrust plate (100) toward the first face of the thrust plate (100).

14. The thrust plate (100) of any one of claims 1-9, wherein the oil supply through hole (104) is cylindrical or conical in shape.

15. A scroll compressor (10) comprising the thrust plate (100) according to any one of claims 1-14.

16. The scroll compressor (10) of claim 15, wherein the scroll compressor (10) further comprises:

a housing (12);

A fixed scroll member (30) and an movable scroll member (20) provided in the housing (12) and configured to compress a refrigerant;

A bearing housing (70) fixedly disposed in the housing (12);

a drive shaft (50) rotatably supported by the bearing housing (70) and driving the orbiting scroll member (20); and

A counterweight (62) fixed to the drive shaft (50) and rotating with the drive shaft (50),

Wherein the thrust plate (100) is fixed to the bearing housing (70) and the thrust surface (110) abuts against an end plate (22) of the orbiting scroll member (20), the counterweight (62) is located in a space (S) formed between the thrust plate (100) and the bearing housing (70), and an annular oil groove (102) of the thrust plate (100) faces the counterweight (62).