CN111425402A

CN111425402A - Thrust plate for scroll compressor and scroll compressor

Info

Publication number: CN111425402A
Application number: CN201910019904.1A
Authority: CN
Inventors: 张跃; 缪仲威; 范忆文
Original assignee: Emerson Climate Technologies Suzhou Co Ltd
Current assignee: Copeland Suzhou Co Ltd
Priority date: 2019-01-09
Filing date: 2019-01-09
Publication date: 2020-07-17

Abstract

A thrust plate (100) for a scroll compressor (10) and a scroll compressor (10) including a thrust plate are disclosed. The thrust plate (100) includes a thrust surface (110) located 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 and does not damage the thrust surface.

Description

Thrust plate for scroll compressor and scroll compressor

Technical Field

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

Background

In a scroll compressor, compression of a fluid is achieved by relative movement between orbiting and non-orbiting scroll members. 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 plate and the thrust plate of the orbiting scroll member to reduce friction and wear therebetween. At present, most of lubricating structures adopted between end plates of movable scroll parts and thrust surfaces of thrust plates have the defects of complex structure, insufficient lubrication or serious abrasion of the thrust surfaces.

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

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 located 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 feed through holes extending from a bottom of the annular oil groove through the thrust plate and to the thrust surface. By adopting the arrangement of the multiple oil supply through holes and the annular oil groove arranged on the opposite surface of the thrust surface, lubricating oil can be supplied more efficiently without damaging the thrust surface.

Further, the thrust plate further includes a plurality of stoppers provided in the annular oil groove, the plurality of stoppers partitioning the annular oil groove into a plurality of oil storage regions and each oil storage region including one or more oil supply through-holes, thereby further forcing the lubricating oil rotating in the circumferential direction into the oil holes.

Further, the stop includes an upper surface perpendicular to the inner and outer sides of the annular oil groove and 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 stopper surface of the stopper portion facing the inside of the oil storage area, and a guide surface between an upper surface of an adjacent stopper portion and the bottom surface.

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

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

Further, the stop surface is a circular arc surface.

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

Further, the guide surface is a slope or a circular arc surface.

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

Further, each oil storage area includes two oil supply through holes, oil outlets of which are respectively located at a position near the radially inner side and a position near the radially outer side of the thrust surface, so that lubrication of the surfaces of the thrust surface near the inner and outer sides and the radially outer side can be simultaneously enhanced to avoid abrasion thereof.

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 collected in the annular oil groove can easily flow to the thrust surface under the action of the dynamic pressure of rotation.

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: the refrigerant compressor includes a housing, a non-orbiting scroll member and an orbiting scroll member disposed in the housing to compress a refrigerant, a bearing housing fixedly disposed on the housing, a drive shaft rotatably supported by the bearing housing and driving the orbiting scroll member, a balance weight fixed on the drive shaft and rotating together with the drive shaft, wherein a thrust plate is fixed to the bearing housing and the thrust surface abuts against an end plate of the orbiting scroll member, the balance 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 balance weight.

Drawings

The features and advantages of one or more embodiments of the present invention will become more readily understood from the following description taken in conjunction with 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 in accordance with a second comparative example of the present invention;

FIG. 3 is a cross-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 according to a second embodiment of the present invention, in which an oil outlet hole of an oil supply through hole is located near a radially inner side of a thrust surface;

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

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 invention, in which oil outlet holes of oil supply through-holes are 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 at the oil feed through hole; and

fig. 8 is an enlarged view of the vicinity of the 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 the embodiment of the present invention. A 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 oil inlet hole 13 and flows along cross hole 15, then flows from oil outlet hole 16 to annular oil groove 18, and finally overflows from annular oil groove 18 to lubricate thrust surface 17 of end plate 11 of orbiting scroll member 1 and a thrust surface (not shown) of a thrust plate that supports thrust surface 17 of end plate 11 when the scroll compressor is in operation.

In the first comparative example, since the annular oil groove is provided on the thrust surface of the orbiting scroll member, two edge edges of the annular oil groove are liable to cause stress concentration, and edge defects such as burrs or the like may damage the thrust surface of the thrust plate which is in close contact with the thrust surface of the orbiting scroll member. In addition, the oil way is arranged on a longer and indirect oil supply road, so that the oil supply amount is small, the thrust surface cannot be sufficiently lubricated, and the abrasion is serious.

Fig. 2 shows a second comparative example which is improved on the basis of the first comparative example. In the second comparative example, compared to the first comparative example, one oil supply passage is added to supply double the lubrication oil to the annular oil groove 16. However, this comparative example still has the disadvantages that the edge of the annular oil groove easily damages 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 example in which only the positions of the annular oil groove and the oil supply passage are changed, that is, the annular oil groove is provided on the thrust surface of the thrust plate and the oil supply passage is provided in the middle of the thrust plate, respectively, also has similar drawbacks as described above.

The following is a description of preferred embodiments in accordance with the invention, which are intended to be illustrative only and are not intended to be limiting of the invention and its application or uses.

I. Basic structure of scroll compressor

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

The scroll compressor (hereinafter "scroll compressor" or "compressor") 10 includes a generally cylindrical housing 12. An intake joint (not shown) is provided on the housing 12 for sucking a low-pressure gaseous refrigerant. An end cap 14 is fixedly attached to one end of the housing 12. The end cap 14 is fitted with a discharge fitting for discharging compressed refrigerant. A partition 16 extending transversely with respect to the shell 12 is also provided between the shell 12 and the end cover 14, thereby dividing 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, and the space between the diaphragm 16 and the casing 12 constitutes a low pressure side space.

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

The orbiting scroll member 20 includes an end plate 22, and a scroll wrap 24 is provided on one surface (upper surface in fig. 3) of the end plate 22, and a cylindrical boss 26 is provided on the other surface (lower surface in fig. 3) thereof. Non-orbiting scroll member 30 includes an end plate 32 and a scroll wrap 34. The wraps 24 of the orbiting scroll member 20 and the wraps 34 of the non-orbiting scroll member 30 are engaged and form fluid pockets therebetween of decreasing volume from the outside toward the central body when the orbiting scroll member 20 and the non-orbiting scroll member 30 are relatively moved to compress the refrigerant in the fluid pockets.

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

A 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, and thus can be rotated integrally with the drive shaft 50 when the drive shaft 50 rotates. The upper portion of the drive shaft 50 is rotatably supported by bearings in the bearing housing 70. The counterweight 62 is located in the bearing housing 70. The second end of the drive shaft 50 (the lower end in fig. 3) may include a concentric bore 54. The concentric bore 54 opens to the eccentric crank pin 52 at the first end of the drive shaft 50 via the eccentric bore 56.

Eccentric crank pin 52 of drive shaft 50 is inserted into hub 26 of orbiting scroll member 20 via bushing 58 to rotatably drive 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.

To prevent axial movement of orbiting scroll member 20, a thrust plate 100 is disposed between orbiting scroll member 20 and bearing housing 70 such that counterweight 62 is positioned between thrust plate 100 and bearing housing 70. The thrust plate 100 may be fixed to the 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 prevent axial movement of orbiting scroll member 20. During rotation of drive shaft 50, relative motion occurs between thrust surface 28 of end plate 22 of orbiting scroll member 20 and thrust surface 110 of thrust plate 100, and therefore sufficient lubrication is required between the two thrust surfaces 28 and 110 to reduce the frictional forces therebetween to prevent seizure or excessive wear of the two. The detailed configuration of the thrust plate 100 will be described later.

The ends of the concentric bores 54 are submerged in the lubricant at the bottom of the compressor shell or otherwise supplied with lubricant. In one example, a lubrication supply, such as an oil pump or oil fork, may be disposed 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 a lubricating oil supply device, 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 crank pin 52, thereby lubricating the gap between the eccentric crank pin 52, the bush 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, which will be described later.

Construction of thrust plate

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

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

A plurality of oil feed through holes 104 extend from a lower portion of the annular oil groove 102 through the thrust plate 100 to the thrust surface 110, and a plurality of oil outlets 106 are formed on the thrust surface 110. The plurality of oil outlets 106 may be arranged to be evenly distributed in the circumferential direction. Preferably, the oil feed through hole 104 is formed to be inclined in the circumferential direction from the back face toward the front face of the thrust plate 100, so that the lubricating oil collected in the annular oil groove 102 can easily flow to the thrust surface 110 under the action of 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 a small diameter end being the oil outlet 106, so that the lubricant flows more easily along the tapered shape to the thrust surface 110.

As shown in fig. 4C, the annular oil groove 102 is located on the back surface of the thrust plate 100, a plurality of stoppers 120 provided in the annular oil groove 102 partition the annular oil groove 102 into a plurality of oil storage regions 108 and each oil storage region 108 includes one oil supply through hole 104. Preferably, the oil sump region 108 may also include a plurality of oil feed through holes 104 to provide more lubrication to each oil sump region 108 to the thrust surface 110. The stopper 120 includes an upper surface 1201, the upper surface 1201 being perpendicular to the inner and

outer side surfaces

1021, 1022 of the annular oil sump 102 and lower than upper edges of the inner and

outer side surfaces

1021, 1022 of the annular oil sump 102. The oil reservoir area 108 is an area surrounded by the inner side surface 1021 of the annular oil reservoir 102, the outer side surface 1022 of the annular oil reservoir 102, the bottom surface 1081, the stop surface 1082 of the stopper 120 facing the oil reservoir area, and the guide surface 1083 of the oil reservoir area. The guide surface 1083 smoothly and obliquely transitions from the upper surface 1201 of the adjacent stopper portion 120 to the bottom surface 1081 located in the vicinity of the oil supply through hole, thereby facilitating guiding of the lubricating oil into the oil supply through hole 104. The stop surface 1082 extends from the upper surface 1201 of the stopper portion 120 in a direction perpendicular to the upper surface 1201 toward the bottom surface 1081, thereby facilitating blocking of the lubricating oil entering the annular oil groove 102 to force the lubricating oil into the oil supply through hole 104. Preferably, to achieve a better effect of gathering up the lubricant, the stop surface 1082 is a circular arc surface partially surrounding the oil supply through hole. Preferably, the guide surface 1083 may be a slope or a circular arc surface. Preferably, the inner and

outer side surfaces

1021, 1022 and the stop and guide

surfaces

1082, 1081 of the annular oil groove 102 are chamfered or rounded, and the upper surface of the stop portion 120 is chamfered or rounded with the guide surface 1083. For ease of machining, the oil sump region 108 may be formed by back milling a portion of material from a formed thrust plate using a milling tool. Preferably, the oil reservoir 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 according to the second embodiment of the present invention, the oil outlet 106 of the oil supply through hole 104 may be provided 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 enhanced purposefully to avoid wear of the surface of the thrust surface 110 near the radially inner side. Preferably, as shown in fig. 6 according to a third embodiment of the present invention, 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 enhanced purposefully to avoid wear of the surface of the thrust surface 110 near the radially outer side. Preferably, as shown in fig. 7A and 7B according to the fourth embodiment of the present invention, the oil outlet 106 of the oil supply through hole 104 may also be provided at both the near-radial-inner side and the near-radial-outer side of the thrust surface 110, so that lubrication of the surfaces of the thrust surface 110 at the near-radial-inner side and the near-radial-outer side may be enhanced at the same time. In this embodiment, two oil supply through holes may be branched into two passages from one opening at the bottom of the oil supply area, leading to the two oil outlet holes, respectively; a plurality of oil supply through holes which do not intersect may be provided in an oil storage region in the annular oil groove on the back surface of the thrust plate. Preferably, the oil outlets 106 may also be more frequently located where the user wants to enhance lubrication, depending on the failure condition, the location of wear, and the location where the user intends to enhance lubrication.

Lubrication process of thrust surfaces

A process of lubricating a thrust surface of a scroll compressor according to an embodiment of the present invention will be described with reference to fig. 8.

As shown in fig. 8, the lubricating oil from eccentric hole 56 of drive shaft 50 first reaches the end of eccentric crank pin 52, and then enters and collects in space S between bearing sleeve 70 and thrust plate 100 via the clearance between eccentric crank pin 52, bush 58, and hub 26 of 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 disposed at one end of the drive shaft also rotates. Since the thrust plate 100 has the annular oil groove 102 on the back surface thereof facing the weight 62 when mounted, when the weight 62 rotates, the lubricating oil collected in the space S, particularly at the bottom of the space S, is agitated by the weight 62 and splashes under centrifugal force in the plurality of oil storage regions 108 (shown in fig. 4C) in the annular oil groove 102 on the back surface of the thrust plate 100, which are partitioned by the stopper portion 120 (shown in fig. 4C), and is collected therein. Since the bottom surface of the oil reservoir region is provided with the inclined guide surface, the lubricating oil flows from one end of the oil reservoir region along the guide surface and gathers at the deeper end of the oil reservoir 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 reservoir region 108 due to being blocked by the stopper 120, and is forced to flow from the back surface of the thrust plate 100 to 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 to flow 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 indicated by an arrow.

The thrust plate of one or more embodiments of the present invention may have the following advantageous effects: (1) the centrifugal force of the balance weight and the rotating 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 annular oil groove arranged on the thrust surface is avoided; (3) the oil is supplied by the plurality of oil supply through holes, so that the oil supply amount is larger and more uniform, and the oil supply is more efficient.

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

Claims

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

a thrust surface (110) located on 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; and

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).

2. The thrust plate (100) of claim 1, wherein the thrust plate (100) further comprises 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 regions (108) and each oil storage region (108) comprising 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 being lower than the second face (130) of the thrust surface (110) or flush with a side edge of the second face (130).

4. The thrust plate (100) of claim 3, wherein the oil reservoir area (108) is an area enclosed 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 stopper portion (120) facing the inside of the oil reservoir area (108), and a guide surface (1083) located between an upper surface of an adjacent stopper 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 stopper portion (120) in a direction perpendicular to the upper surface (1201) toward the bottom surface (1081).

7. The thrust plate (100) of claim 6, wherein the stop surface (1082) is a circular arc surface that partially surrounds the oil feed 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 beveled surface or a radiused surface.

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

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

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

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

15. A scroll compressor (10) comprising a thrust plate (100) as claimed in any one of claims 1 to 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 orbiting scroll member (20) provided in the casing (12) and compressing a refrigerant;

a bearing sleeve (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).