CN113915124A

CN113915124A - Scroll compressor having a plurality of scroll members

Info

Publication number: CN113915124A
Application number: CN202010662040.8A
Authority: CN
Inventors: 韩艳春; 许美玲; 缪仲威; 赵景莲
Original assignee: Emerson Climate Technologies Suzhou Co Ltd
Current assignee: Copeland Suzhou Co Ltd
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2022-01-11

Abstract

The invention discloses a scroll compressor. This scroll compressor includes: a fixed scroll member; the movable scroll component and the fixed scroll component are matched with each other to form a compression mechanism for compressing working fluid, and the movable scroll component comprises a movable scroll end plate; the rotating shaft is used for driving the movable vortex component to move relative to the fixed vortex component so as to compress working fluid; a bearing housing on which a rotation shaft is rotatably supported; and a thrust plate disposed between the orbiting scroll member and the bearing housing, the orbiting scroll end plate being slidably supported on the thrust plate. Wherein, be provided with solitary wearing parts between vortex end plate and the thrust plate.

Description

Scroll compressor having a plurality of scroll members

Technical Field

The present invention relates to a scroll compressor, and in particular to a scroll compressor having a separate wear member disposed between the orbiting scroll end plate and the thrust plate of the scroll compressor.

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 one side of an end plate of the orbiting scroll member. The thrust plate is fixed to or formed as one piece with the bearing housing. During operation of the compressor, the orbiting scroll member moves in translation relative to the thrust plate, which is in direct contact with the orbiting scroll member. Typically, the thrust plate and orbiting scroll member are made of cast iron and the contact surfaces are finely machined. Sometimes, in order to make the surface contact better and reduce the risk of wear, a slight slope needs to be machined on the contact surface. This structure has the drawback of high cost of contact surface machining and of being easily worn.

The problem of abrasion caused by direct contact between a thrust plate and a movable scroll part is solved. Usually, a technical means of spraying the wear-resistant coating on the contact surface of the two is adopted. However, at high loads, the abradable coating is susceptible to wear, re-exposing the contact surfaces of the thrust plate and orbiting scroll member and still causing direct contact between the two, leaving the contact surfaces of the two still susceptible to wear.

Accordingly, there is a need in the art for a scroll compressor that reduces wear between the thrust plate and the orbiting scroll member and reduces manufacturing costs.

Disclosure of Invention

In order to reduce wear between the thrust plate and the orbiting scroll component of a scroll compressor and to reduce the manufacturing cost of a scroll compressor, the present invention provides several embodiments of a scroll compressor having a separate wear member disposed between the orbiting scroll end plate and the thrust plate of the scroll compressor.

The scroll compressor according to the present invention includes: a fixed scroll member; the movable scroll component and the fixed scroll component are matched with each other to form a compression mechanism for compressing working fluid, and the movable scroll component comprises a movable scroll end plate; the rotating shaft is used for driving the movable vortex component to move relative to the fixed vortex component so as to compress working fluid; a bearing housing on which a rotation shaft is rotatably supported; and a thrust plate disposed between the orbiting scroll member and the bearing housing, the orbiting scroll end plate being slidably supported on the thrust plate. Wherein, be provided with solitary wearing parts between vortex end plate and the thrust plate.

Wherein one of the orbiting scroll member and the thrust plate is provided with first positioning means on a bearing surface thereof which cooperates with the wear member, the first positioning means being configured to define at least a position of the wear member in a radial direction.

Wherein the first positioning device comprises at least one of: an inner circumferential step portion located radially inward of the wear member; an outer circumferential step located radially outward of the wear member.

Wherein the wear part has a first mating surface that mates with the bearing surface. Wherein, be provided with the second positioner on the first mating surface, the second positioner is one in convex part and concave part, and first positioner includes the other in convex part and concave part, and the convex part cooperates with the concave part in order to fix a position wear-resisting piece.

Wherein, the wearing parts are integrated into one piece's annular member.

Wherein the wear part comprises a plurality of wear units arranged circumferentially to form the annular part.

Wherein the plurality of wear units are coupled to each other at adjacent circumferential edges by a coupling structure.

Wherein, the coupling structure includes: a locking protrusion provided at one of the adjacent circumferential edges; and a locking groove provided at the other of the adjacent circumferential edges, which engages with the locking protrusion.

Wherein the second positioning means is provided at the coupling structure.

Wherein the circumferential edge of each wear unit is linear, arcuate or involute.

Wherein oil grooves are formed among the plurality of wear-resistant units.

Wherein the wear part comprises a plurality of discrete wear units arranged in a circumferentially staggered manner.

Wherein the wear part is provided with a plurality of second positioning means having different structures.

Wherein the wear member has a second mating surface that mates with the other of the orbiting scroll member and the thrust plate. Wherein, be provided with a plurality of oil grooves that extend to the outside from radial inboard on the second mating surface.

Wherein, the wear resistant part is made of non-metallic materials.

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 cross-sectional view of a portion of a scroll compressor according to the present invention;

FIG. 2A is a perspective view of a thrust plate assembly according to a first embodiment of the present invention;

FIG. 2B is a cut-away perspective view of a thrust plate assembly according to a first embodiment of the present invention;

FIG. 3A is a perspective view of a thrust plate assembly according to a second embodiment of the present invention;

fig. 3B is a perspective view of a thrust plate according to a second embodiment of the present invention;

fig. 3C is a perspective view of a wear part according to a second embodiment of the invention;

FIG. 3D is an enlarged partial view of the wear member shown in FIG. 3C;

fig. 4A is a perspective view of a wear unit according to a third embodiment of the present invention;

fig. 4B is a perspective view of a wear part according to a third embodiment of the invention;

FIG. 4C is a perspective view of a thrust plate assembly according to a third embodiment of the present invention;

FIG. 4D is a cut-away perspective view of a thrust plate assembly according to a third embodiment of the present invention;

FIG. 5A is a perspective view of a thrust plate assembly according to a fourth embodiment of the present invention;

FIG. 5B is a cut-away perspective view of a thrust plate assembly according to a fourth embodiment of the present invention;

fig. 5C is a perspective view of a thrust plate according to a fourth embodiment of the present invention;

fig. 5D is a perspective view of a wear unit according to a fourth embodiment of the present invention;

fig. 6A is a perspective view of a thrust plate assembly according to a fifth embodiment of the present invention;

fig. 6B is a cross-sectional perspective view of a thrust plate assembly according to a fifth embodiment of the present invention;

fig. 6C is a perspective view of a thrust plate according to a fifth embodiment of the present invention;

fig. 6D is a perspective view of a wear unit according to a fifth embodiment of the present invention;

FIG. 7A is a perspective view of a thrust plate assembly according to a sixth embodiment of the present invention;

fig. 7B is a perspective view of a thrust plate according to a sixth embodiment of the present invention;

fig. 7C is a perspective view of a wear unit according to a sixth embodiment of the present invention;

FIG. 8A is a top view of a thrust plate assembly according to a seventh embodiment of the present invention;

FIG. 8B is a cross-sectional view of the thrust plate assembly taken along line A-A in FIG. 8A;

FIG. 8C is a perspective view of a thrust plate assembly according to a seventh embodiment of the present invention;

FIG. 9A is a top view of an orbiting scroll assembly according to an eighth embodiment of the present invention;

FIG. 9B is a cross-sectional view of the orbiting scroll assembly taken along line A-A in FIG. 9A;

FIG. 9C is a perspective view of an orbiting scroll assembly according to an eighth embodiment of the present invention;

FIG. 10 is a cross-sectional view of a portion of a scroll compressor of a comparative example.

Detailed Description

The following description of various embodiments of the invention is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. The same reference numerals are used in the respective drawings to denote the same type of components, and the configuration of the same components will not be described repeatedly.

The basic construction and operating principle of the scroll compressor according to the present invention will now be described with reference to fig. 1. The scroll 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 and a bottom cap (not shown) is fixedly attached to the other end. 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, the partition 16 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, the casing 12 and the bottom cap constitutes a low pressure side space.

The housing 12 accommodates therein an orbiting scroll member 20 and a non-orbiting scroll member 30 as a compression mechanism. The orbiting scroll part 20 includes an orbiting scroll end plate 22, and a spiral vane 24 is provided on an upper surface of the orbiting scroll end plate 22 and a cylindrical boss 26 is provided on a lower surface thereof. Non-orbiting scroll member 30 includes a non-orbiting scroll end plate 32 and a spiral vane 34. The spiral vane 24 of the orbiting scroll member 20 and the spiral vane 34 of the non-orbiting scroll member 30 are engaged with each other and form a compression chamber therebetween having a gradually decreasing volume from the outside toward the central body when the orbiting scroll member 20 moves with respect to the non-orbiting scroll member 30 so as to compress refrigerant in the compression chamber. The scroll compressor 10 also includes a drive shaft 50. One end of the driving shaft 50 is provided with an eccentric crank pin 52 and a weight 60. The counterweight 60 is fixedly disposed on the drive shaft 50 and thus can rotate together 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 60 is located in the bearing seat 70. Eccentric crank pin 52 of drive shaft 50 is inserted into hub 26 of orbiting scroll member 20 via bushing 58 to drive orbiting scroll member 20. As the orbiting scroll member 20 moves relative to the non-orbiting scroll member 30, a compression chamber formed between the orbiting scroll member 20 and the non-orbiting scroll member 30 moves from a radially outer position to a central position of the orbiting scroll member 20 and the non-orbiting scroll member 30 and gradually decreases in volume. The compressed fluid is discharged through an exhaust port 36 provided in the center of the non-orbiting scroll end plate 32 of the non-orbiting scroll member 30. The drive shaft 50 may include an eccentric bore 56, the eccentric bore 56 leading to the eccentric crank pin 52 for supplying lubricant in the compressor bottom sump to the movable components of the compressor for lubrication.

Thrust plate 80 is disposed between orbiting scroll member 20 and bearing housing 70, and thrust plate 80 may be fixed to bearing housing 70 or formed as a unitary piece with bearing housing 70. Thrust plate 80 serves to axially support orbiting scroll member 20. Orbiting scroll end plate 22 is disposed on the upper surface of thrust plate 80. Wear resistant member 100 is disposed between thrust plate 80 and orbiting scroll end plate 22. As drive shaft 50 drives orbiting scroll member 20 to rotate, relative motion is generated between orbiting scroll member 20 and thrust plate 80. Because wear members 100 are disposed between orbiting scroll end plate 22 and thrust plate 80, there is no direct contact therebetween, thereby reducing wear of orbiting scroll member 20 and thrust plate 80. Wear member 100 is a separate mechanical component having a thickness, as opposed to a wear-resistant coating applied to orbiting scroll component 20 or thrust plate 80. The wear resistant member 100 is a sheet-like member made of a non-metallic material having good wear resistance, low friction coefficient and small deformation. Preferably, the wear part 100 is graphite filled polymer or polytetrafluoroethylene. Preferably, the wear part has a thickness of less than 4 mm.

Fig. 10 shows a comparative example with respect to the embodiment of the present invention. Scroll compressor 10 'includes an orbiting scroll member 20' and a thrust plate 80 'that supports orbiting scroll member 20'. Orbiting scroll member 20 'includes an end plate 22'. Thrust plate 80 'of scroll compressor 10' is in direct contact with end plate 22 'of orbiting scroll member 20'. Typically, thrust plate 80 'and orbiting scroll member 20' are fabricated from cast iron and the contact surfaces thereof are finely machined. Sometimes, a slight slope needs to be machined on the contact surface in order to get better contact with the surface and reduce the risk of wear. This structure has the following disadvantages: when the oil film between thrust plate 80 ' and end plate 22 ' of orbiting scroll member 20 ' is damaged due to high pressure, high speed and poor surface quality, or viscosity reduction or backflow of liquid refrigerant due to high temperature, etc., severe wear will be caused on the contact surfaces of the two; the contact surface between thrust plate 80 ' and end plate 22 ' of orbiting scroll member 20 ' requires fine machining to obtain better contact and low coefficient of friction, resulting in longer lead times and higher manufacturing costs; if the contact surface between thrust plate 80 ' and end plate 22 ' of orbiting scroll member 20 ' is poorly machined, has worn away, or is starved of oil, performance may be degraded by the increase in the coefficient of friction.

In the scroll compressor 10 according to the present invention shown in fig. 1, the thrust plate 80 is not in direct contact with the orbiting scroll end plate 22, but a wear-resistant member 100 having a low friction coefficient and good wear resistance is provided, so that it is possible to reduce wear of the thrust plate 80 and the orbiting scroll end plate 22 and to reduce manufacturing costs and part delivery time since fine machining or fine slope machining of the contact surface is not required, as compared to the comparative example shown in fig. 10.

The wear member 100 may be assembled to the thrust plate 80 and, together with the thrust plate 80, form a thrust plate assembly 110. The thrust plate assembly 110 of various embodiments is described in detail below.

The thrust plate assembly 110 according to the first embodiment of the present invention is described in detail below with reference to fig. 2A and 2B. The thrust plate assembly 110 includes a thrust plate 80 and a wear member 100 that mates with the thrust plate 80. Wherein the thrust plate 80 has an annular shape having a through hole 85 at the center thereof. In an assembled state of the compressor, a boss portion (not shown) of the orbiting scroll member is disposed through the through hole 85. A stepped portion 81 is provided on a bearing surface of the thrust plate 80 to be fitted with the wear-resistant member 100. The step 81 is provided along the circumference of the through hole and protrudes upward from the support surface. The stepped portion 81 is located radially inward of the thrust plate 80. When the wear part is placed on this bearing surface, the step 81 is located radially inside the wear part. The step 81 is also referred to as an inner circumferential step. In the present embodiment, the surface of the wear member that mates with this bearing surface of the thrust plate 80 is referred to as a first mating surface. In a preferred embodiment, the stepped portion 81 also protrudes toward the center of the through hole with respect to the inner circumferential surface of the through hole 85. The wear member 100 is an integrally formed sheet-like annular member. When the wear-resistant member 100 is fitted to the thrust plate 80, the wear-resistant member 100 may be placed on the bearing surface of the thrust plate 80 in the axial direction, and the wear-resistant member 100 is fitted over the radially outer side of the stepped portion 81 to achieve positioning between the wear-resistant member 100 and the thrust plate 80. Step 81 can define the radial position of wear member 100 relative to thrust plate 80, and can limit the radial movement of wear member 100 relative to thrust plate 80 to prevent wear member 100 from backing out from between thrust plate 80 and orbiting scroll member 20. Here, the step portion 81 is a first positioning means. Alternatively, a stepped portion protruding upward from the bearing surface of the thrust plate 80 may also be provided at the radially outer side of the bearing surface of the thrust plate 80. When the stepped portion is located radially outward of the thrust plate, the stepped portion is also located radially outward of the wear-resistant member when the wear-resistant member is disposed on the bearing surface of the thrust plate. At this time, the step portion is also referred to as an outer circumferential step portion. Of course, both the inner circumferential stepped portion and the outer circumferential stepped portion may be provided. The stepped portion 81 may be obtained by machining an annular groove in the upper surface of the thrust plate 80. The height of the protrusion of the stepped portion 81 from the bearing surface of the thrust plate 80 is equal to or less than the thickness of the wear-resistant member 100.

In the present embodiment, the surface of the wear member 100 to be in contact with the orbiting scroll member (not shown) is referred to as a second mating surface. An oil groove 102 is provided on the second mating surface to facilitate providing lubricant to the contact surfaces of the wear part 100 and the orbiting scroll member and to remove debris from the contact surfaces, reducing the risk of wear. The oil groove 102 may be machined by removing material from the surface of the wear part 100. Alternatively, a plurality of oil grooves 102 can be provided. Alternatively, the plurality of oil grooves 102 are evenly distributed in the circumferential direction. Alternatively, the oil groove 102 is a linear or involute oil groove extending from a radially inner side toward a radially outer side of the wear member 100. Alternatively, oil grooves may not be provided on the surface of the wear part 100.

A thrust plate assembly 110 according to a second embodiment of the present invention is explained in detail below with reference to fig. 3A-3D. The thrust plate assembly 110 includes a thrust plate 80 and a wear member 100 that mates with the thrust plate 80. The positioning between the wear member 100 and the thrust plate 80 is achieved in this embodiment in the same manner as in the above-described first embodiment of the present invention, namely: by providing a step 81 projecting upwardly from the bearing surface of the thrust plate 80 that mates with the wear member 100 and by defining the position of the wear member 100 on the thrust plate 80 by the step. Here, the step portion is a first positioning means. The difference from the first embodiment of the present invention is that the wear-resistant member 100 of the present embodiment is not an integrally formed ring-shaped member, but a ring-shaped member formed by splicing a plurality of wear-resistant units 104 in the circumferential direction. The figure shows a wear part formed by 4 identically shaped wear units 104. It is contemplated that the wear member 100 can be formed from other numbers of wear units 104 of other shapes. As shown in fig. 3C to 3D, each wear-resistant unit 104 is provided at both ends in the circumferential direction thereof with a circumferentially protruding locking protrusion 105 and a locking groove 106 that is matched in shape to the locking protrusion 105. That is, at an edge of a wear-resistant unit to be abutted against an adjacent wear-resistant unit, a locking protrusion protruding outward from the edge and a locking groove recessed inward are provided.

Adjacent two wear units 104 are coupled to each other by a coupling structure, in particular, by a snap fit between the locking protrusion 105 and the locking groove 106. The fit between the locking protrusion 105 and the locking groove 106 is an interference fit, and alternatively, the fit therebetween may be a clearance fit. The locking protrusion 105 may have a trapezoidal shape, i.e., the top end of the locking protrusion 105 is wider and the bottom combined with the body of the wear unit 104 is narrower. The locking groove 106 is wider at the bottom of the groove and narrower at the top of the groove at the outer edge of the wear unit 104. This shape makes it possible to prevent the locking projection 105 from coming out of the locking groove 106 after two adjacent wear units are coupled together. Alternatively, the locking protrusion 105 and the locking groove 106 may have other matching shapes that prevent the falling-off. The present embodiment also differs from the first embodiment of the invention in that the oil groove 102 of the present embodiment is provided at the splice of two wear units 104, i.e. between the abutting edges of adjacent wear units 104. The complete oil groove 102 can be formed between two adjacent wear units 104 by reducing the thickness of the wear units at the outer edge of the end of the wear units 104 where the locking groove 106 is provided, and splicing the two adjacent wear units 104 together. The oil groove 102 according to the present embodiment has an advantage in that it is simple to process, thereby facilitating processing and manufacturing.

A thrust plate assembly 110 according to a third embodiment of the present invention is described in detail below with reference to fig. 4A-4D. The thrust plate assembly 110 includes a thrust plate 80 and a wear member 100 that mates with the thrust plate 80. According to this embodiment, the surface of the wear member that engages the thrust plate is a first engagement surface, and the surface that engages the orbiting scroll member is a second engagement surface. Similarly to the second embodiment of the present invention, the wear-resistant member 100 is also formed by a plurality of wear-resistant units 104 which are circumferentially spliced into a ring. But differs from the second embodiment of the present invention in the manner of splicing between adjacent wear units 104. As shown in fig. 4A-4B, each wear-resistant unit 104 is provided at the inside of the edge of one end in the circumferential direction thereof with a cylindrical snap projection 107, the snap projection 107 projecting in the axial direction from the surface to be in contact with the thrust plate 80. Each wear-resistant unit 104 is provided, outside the edge of the other end in the circumferential direction thereof, with a cylindrical snap groove 108, the snap groove 108 protruding in the axial direction from the surface to be in contact with the thrust plate 80, and is also provided, on the outer periphery of the snap groove 108, with a cylindrical projection 103 that is tangential to and fixedly connected to the outside of the snap groove 108. Wherein the protrusion 103 is partially fixed to the surface of the other end of the wear unit 104, thereby connecting the snap groove 108 to the surface of the other end of the wear unit 104. Two adjacent wear units 104 are spliced together by inserting the snap protrusions 107 into the snap grooves 108. As shown in fig. 4D, the same number of recesses 82 as the number of protrusions 103 are provided on the bearing surface of the thrust plate 80 that mates with the wear-resistant member 100. The recess 82 has a shape conforming to the outer contour of the protrusion 103. When the wear-resistant member 100 is disposed on the thrust plate 80, the convex portion 103 is disposed in the concave portion 82. The cooperation of the male part 103 with the female part 82 limits both the radial movement of the wear part 100 relative to the thrust plate 80 and the circumferential movement of the wear part 100 relative to the thrust plate 80, thus achieving in this way the radial and circumferential positioning of the individual wear units relative to the thrust plate 80. Here, the convex portion 103 and the concave portion 82 are second positioning means. According to this embodiment, the oil groove 102 can be provided at the splice of two wear units 104. Preferably, the oil groove 102 is provided on the second mating surface of the wear part 100.

A thrust plate assembly 110 according to a fourth embodiment of the present invention is described in detail below with reference to fig. 5A-5D. Similar to the third embodiment, the wear-resistant member 100 according to the fourth embodiment is also an annular member formed by splicing a plurality of wear-resistant units 104 in the circumferential direction. According to this embodiment, the surface of the wear member that engages the thrust plate is a first engagement surface, and the surface that engages the orbiting scroll member is a second engagement surface. As shown in the figures, the wear part 100 is formed by 4 wear units 104 of the same shape. It is contemplated that the wear member 100 can be formed from other numbers of wear units 104 of other shapes. The difference from the third embodiment is that the wear-resistant units 104 according to the fourth embodiment are not fixed to each other, and each wear-resistant unit 104 is individually directly fitted to the thrust plate 80. It also differs from the third embodiment in the structure that achieves the relative positioning between the thrust plate 80 and the wear-resistant unit 104. As shown in fig. 5D, the side of the wear-resistant unit 104 that engages with the thrust plate 80 is provided with a cylindrical convex portion 103 and a rectangular parallelepiped convex portion 133 at a certain distance. As shown in fig. 5B-5C, the same number of recesses 82 as the number of

protrusions

103, 133 is provided on the bearing surface of the thrust plate 80 that mates with the wear-resistant member 100. Radial and circumferential movement of the wear unit 104 relative to the thrust plate 80 can be restricted by inserting two differently shaped protrusions into corresponding recesses. Here, the convex and concave portions are second positioning means. When the wear unit 104 is fully installed on the thrust plate 80, the wear unit 104 forms exactly one complete annular piece. In the case where two different-shaped protrusions are provided on each wear-resistant unit 104, the protrusions 103 can be prevented from rotating relative to the thrust plate 80 when the wear-resistant units 104 are fitted to the thrust plate 80. Preferably, according to the present embodiment, the oil groove 102 may also be provided at the joint of the two wear units 104.

A thrust plate assembly 110 according to a fifth embodiment of the present invention is described in detail below with reference to fig. 6A-6D. The thrust plate assembly 110 includes a thrust plate 80 and a wear member 100 that mates with the thrust plate 80. According to this embodiment, the surface of the wear member that engages the thrust plate is a first engagement surface, and the surface that engages the orbiting scroll member is a second engagement surface. Similar to the fourth embodiment of the present invention, the wear-resistant member 100 is also formed by a plurality of wear-resistant units 104 which are circumferentially spliced into a ring. The wear units 104 are not coupled to each other, and each wear unit 104 is individually directly fitted to the thrust plate 80. As shown in the figures, the wear part 100 is formed by 4 identically shaped wear units 104. It is contemplated that the wear member 100 can be formed from other numbers of wear units 104 of other shapes. The difference from the fourth embodiment is that the positioning structure according to the fifth embodiment, which achieves the relative positioning between the thrust plate 80 and the wear-resistant member 100, is different. As shown in fig. 6D, each wear-resistant unit 104 is provided with a semi-cylindrical convex portion 103 on the surface of the side that is fitted with the thrust plate 80, the convex portion 103 being provided at the splice with the adjacent wear-resistant unit 104, i.e., at the circumferential edge of the wear-resistant unit. The two semi-cylindrical protrusions may form a complete cylinder when adjacent wear units 104 are spliced together. As shown in fig. 6B-6C, the same number of recesses 82 as the number of complete cylindrical pieces are provided on the bearing surface of the thrust plate 80 on the side where the wear-resistant member 100 is fitted. By inserting complete male portions, which are made by splicing two semi-cylindrical male portions, into the corresponding female portions 82, the position of the wear-resistant unit 104 relative to the thrust plate 80 can be defined, and the radial and circumferential movements of the wear-resistant unit 104 relative to the thrust plate 80 can be restricted. Here, the convex and concave portions are second positioning means. When the wear units 104 are all mounted on the thrust plate 80, the wear units 104 form exactly one complete annular piece. Providing two semi-cylindrical protrusions 103 at the edges of both ends of each wear-resistant unit 104 in the circumferential direction also prevents the protrusions 103 from rotating relative to the thrust plate 80 when the wear-resistant units 104 are fitted to the thrust plate 80. Preferably, according to the present embodiment, the oil groove 102 may also be provided at the joint of the two wear units 104.

A thrust plate assembly 110 according to a sixth embodiment of the present invention is explained in detail below with reference to fig. 7A to 7C. The thrust plate assembly 110 includes a thrust plate 80 and a wear member 100 that mates with the thrust plate 80. As with the previous embodiment, the thrust plate 80 is also of annular shape having a through hole at its center through which a boss portion (not shown) of the orbiting scroll member is disposed in an assembled state of the scroll compressor. As shown in fig. 7B, stepped portions 81 are provided on both the radially inner side and the radially outer side of the thrust plate 80, that is: an inner circumferential step portion and an outer circumferential step portion are provided. A stepped portion 81 protrudes upward from a bearing surface of the thrust plate, which is in contact with the wear-resistant member. The wear member 100 is disposed between the two stepped portions, so that the wear member 100 can be restricted from being displaced in the radial direction with respect to the thrust plate. In this manner, radial positioning between the wear member 100 and the thrust plate 80 is achieved. The stepped portion 81 may be obtained by machining an annular groove in the bearing surface of the thrust plate 80. As shown in fig. 7B, a fixing protrusion 83 is provided in an annular groove surrounded by the step 81 on the radially inner side and the step 81 on the radially outer side. As shown in fig. 7A, the wear member 100 is spliced into a complete ring by a plurality of wear units 104. Wherein a gap is provided between adjacent wear units 104. The gap is used for supplying lubricating oil. Each wear unit 104 is provided with a fixing groove 109 at an intermediate position on the side engaged with the thrust plate 80. The wear-resistant unit 104 can be fixed to the thrust plate 80 by providing the fixing projection 83 on the thrust plate 80 in the fixing groove 109. The mating configuration of the fixing groove 109 with the fixing protrusion 83 and the stepped portion define the circumferential and radial position of the wear-resistant unit 104 on the thrust plate 80 and prevent the circumferential and radial movement of the wear-resistant unit 104 relative to the thrust plate 80. The fixing protrusion and the fixing groove are fixing means.

When the wear units 104 are all mounted on the thrust plate 80, the wear units 104 form exactly one complete annular piece. Alternatively, a fixing groove may be provided in an annular groove surrounded by the step portions 81 on the radially inner side and the radially outer side of the thrust plate 80, and a fixing protrusion may be provided on a surface of the wear-resistant unit 104 on the side that engages with the thrust plate 80. Alternatively, instead of providing the fixing groove 109 and the fixing protrusion 83 on the wear-resistant unit 104 and the thrust plate 80, the wear-resistant unit may be simply placed in an annular groove surrounded by the radially inner and outer steps 81 of the thrust plate 80.

A thrust plate assembly 110 according to a seventh embodiment of the present invention is explained in detail below with reference to fig. 8A to 8C. The thrust plate assembly 110 includes a thrust plate 80 and a wear member 100 that mates with the thrust plate 80. The wear part 100 comprises a plurality of wear units 104 to facilitate removal and replacement of the wear units 104. A plurality of wear-resistant units 104 are arranged on the thrust plate 80 in a staggered manner in the circumferential direction. As shown, two rings of wear-resistant units are provided in the circumferential direction at two different radial positions of the thrust plate. The wear units of the first ring of wear units arranged at a first radial position are arranged alternately with the wear units of the second ring of wear units arranged at a second radial position. The distance between the wear units in the circumferential direction is equal. Alternatively, the thrust plate 80 may be provided with other numbers of wear units 104 at different radial positions. Alternatively, the wear-resistant units 104 in the same ring may be spaced apart by different distances in the circumferential direction. Alternatively, the wear units 104 may take other arrangements. Since the wear unit 104 does not completely cover the thrust surface of the thrust plate 80, material of the wear member 100 can be saved. Preferably, wear member 100 may be positioned where axial stresses are greater in thrust plate 80 and the orbiting scroll member (not shown) to purposely reduce wear between the orbiting scroll member and the thrust plate while conserving wear member material. In this embodiment, a male and female mating orientation is still used. Specifically, convex portions are provided on the side where each wear-resistant unit 104 is fitted with the thrust plate 80, concave portions having the same number and shape as those of the convex portions are provided on the thrust plate 80, or concave portions are provided on the side where each wear-resistant unit 104 is fitted with the thrust plate 80, and convex portions having the same number and shape as those of the concave portions are provided on the thrust plate 80, so that the positioning of the wear-resistant unit 104 on the thrust plate 80 is achieved and the movement of the wear-resistant unit in the radial direction and the circumferential direction with respect to the thrust plate is restricted by the fitting of the convex portions and the concave portions. The convex part and the concave part are second positioning devices.

In addition, wear members 100 may also be assembled to orbiting scroll member 20 to form an orbiting scroll assembly 120 with orbiting scroll member 20. Orbiting scroll assembly 120 according to an eighth embodiment of the present invention will be described in detail with reference to fig. 9A-9C. Orbiting scroll assembly 120 includes an orbiting scroll member 20 and a wear part 100 that mates with orbiting scroll member 20. According to this embodiment, the surface of the wear member that engages the orbiting scroll member is a first engagement surface and the surface of the wear member opposite the first engagement surface is a second engagement surface. A plurality of protrusions 103 are provided on the first mating surface of the wear part 100, evenly distributed in the circumferential direction. The orbiting scroll part 20 includes an orbiting scroll end plate 22, and concave portions 23 as many as the number of convex portions 103 are provided on a bearing surface of the orbiting scroll end plate 22 on the side where the wear resistant member 100 is fitted. The positioning of the wear member 100 on the orbiting scroll member 20 is achieved by the mating of the protrusion 103 and the recess 23. Alternatively, the wear resistant member 100 may have the structure of any one of the wear resistant members shown in the first to eighth embodiments. Alternatively, the relative positioning between wear member 100 and orbiting scroll member 20 may be achieved by positioning the wear member and thrust plate in the first through seventh embodiments. Alternatively, the oil groove may adopt any one of the oil groove structures shown in the first to eighth embodiments. In addition, the hub portion of the orbiting scroll member may serve as the first locating means for the wear member when the wear member is assembled to the orbiting scroll member 20.

Wherein the axial direction as referred to herein indicates an axial direction of a drive shaft of the compressor in an assembled state of the compressor, the radial direction is a direction perpendicular to the axial direction, and the circumferential direction is a circumferential direction around a central axis of the drive shaft.

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 scroll compressor, comprising:

a fixed scroll member;

the movable scroll component and the fixed scroll component are matched with each other to form a compression mechanism for compressing working fluid, and the movable scroll component comprises a movable scroll end plate;

a rotating shaft for driving the orbiting scroll member to move the orbiting scroll member relative to the non-orbiting scroll member to compress the working fluid;

a bearing housing on which the rotating shaft is rotatably supported; and

a thrust plate disposed between said orbiting scroll member and said bearing housing, said orbiting scroll end plate slidably supported on said thrust plate,

wherein, be provided with solitary wearing parts between the vortex end plate that moves and the thrust plate.

2. The scroll compressor of claim 1, wherein one of the orbiting scroll member and the thrust plate is provided with a first locating means on its bearing surface that mates with the wear member, the first locating means configured to define at least a position of the wear member in a radial direction.

3. The scroll compressor of claim 2, wherein the first positioning device comprises at least one of:

an inner circumferential step portion located radially inward of the wear member;

an outer circumferential step located radially outward of the wear member.

4. The scroll compressor of claim 2, wherein the wear member has a first mating surface that mates with the bearing surface, the first mating surface having a second locating means disposed thereon, the second locating means being one of a protrusion and a recess, the first locating means including the other of a protrusion and a recess, the protrusion mating with the recess to locate the wear member.

5. The scroll compressor of any one of claims 1-4, wherein the wear member is an integrally formed annular member.

6. The scroll compressor of any one of claims 1-4, wherein the wear member includes a plurality of wear units arranged circumferentially to form an annular member.

7. The scroll compressor of claim 6, wherein a plurality of the wear resistant units are coupled to one another at adjacent circumferential edges by a coupling structure.

8. The scroll compressor of claim 7, wherein the coupling structure comprises:

a locking protrusion provided at one of the adjacent circumferential edges; and

a locking groove provided at the other of the adjacent circumferential edges that engages with the locking protrusion.

9. The scroll compressor of claim 7, wherein one of the orbiting scroll member and the thrust plate has a bearing surface that mates with the wear member, the bearing surface having a first locating means disposed thereon,

wherein the wear part has a first mating surface that mates with the bearing surface, a second locating means is provided on the first mating surface, the second locating means being one of a protrusion and a recess, the first locating means comprising the other of a protrusion and a recess, the protrusion mating with the recess to locate the wear part,

wherein the second positioning device is provided at the coupling structure.

10. The scroll compressor of claim 6, wherein a circumferential edge of each wear unit is linear, arcuate, or involute.

11. The scroll compressor of claim 6, wherein an oil sump is formed between a plurality of the wear resistant units.

12. The scroll compressor of any one of claims 1-4, wherein the wear member includes a plurality of wear resistant units in a discrete circumferentially staggered arrangement.

13. The scroll compressor of claim 4, wherein the wear member is provided with a plurality of second locating means of different construction.

14. The scroll compressor of claim 2, wherein the wear member has a second mating surface that mates with the other of the orbiting scroll member and the thrust plate, wherein the second mating surface has a plurality of oil grooves disposed thereon that extend from a radially inner side to a radially outer side.

15. The scroll compressor of claim 1, wherein the wear member is made of a non-metallic material.