CN112727770A

CN112727770A - Scroll compressor and air conditioner

Info

Publication number: CN112727770A
Application number: CN202011578661.4A
Authority: CN
Inventors: 徐嘉; 单彩侠; 李立民; 郭求和
Original assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Current assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-04-30
Anticipated expiration: 2040-12-28
Also published as: CN112727770B

Abstract

The invention provides a scroll compressor and an air conditioner, wherein the scroll compressor comprises a crankshaft and a bracket sleeved on the crankshaft, a bearing is arranged between the crankshaft and the bracket, a damping piece is also arranged between the crankshaft and the bracket, and when the crankshaft swings in the radial direction, the damping piece can be extruded and deformed. According to the invention, the damping piece is arranged between the crankshaft and the bracket, when the crankshaft swings in the radial direction, the crankshaft applies force on the damping piece, so that the damping piece is forced to deform, the deformed damping piece generates friction heat, and the swinging vibration of the crankshaft is converted into the heat of the damping piece to be offset, so that the vibration of a compressor shafting can be essentially reduced, the noise level of the compressor is improved, and the operation reliability of the compressor is improved.

Description

Scroll compressor and air conditioner

Technical Field

The invention belongs to the technical field of compressor manufacturing, and particularly relates to a scroll compressor and an air conditioner.

Background

For the scroll compressor, the compression process of the pump body is driven by the crankshaft, and meanwhile, in order to ensure the stable operation of the shafting, two bearing structures (an upper bearing and a lower bearing) are generally arranged to restrain the scroll compressor. However, during the operation of the shafting, due to the fluctuation of the load in the rotation period, the shafting can generate a certain degree of swing in the radial direction, and the vibration caused by the swing can be absorbed by the bearing. Generally, vibration absorbed by the bearing is transmitted to the compressor housing, and then noise is generated and released into the air.

In order to reduce the noise generated by shafting oscillation, sound insulation cotton is usually pasted outside the compressor or structures such as an external sound insulation cover are specially arranged to reduce the noise of the compressor, and the vibration reduction and damping structures are arranged outside the compressor to reduce the vibration of the compressor in the processing modes, so that the noise level of the compressor is reduced, the vibration level of the compressor is not reduced substantially, and the operation reliability of the compressor cannot be improved.

Disclosure of Invention

Therefore, the technical problem to be solved by the present invention is to provide a scroll compressor and an air conditioner, so as to overcome the defects that the vibration level of the compressor itself cannot be reduced and the operation reliability of the compressor itself cannot be improved by arranging a vibration absorption and noise reduction component outside the compressor in the prior art.

In order to solve the problems, the invention provides a scroll compressor, which comprises a crankshaft and a bracket sleeved on the crankshaft, wherein a bearing is arranged between the crankshaft and the bracket, a damping piece is also arranged between the crankshaft and the bracket, and the damping piece can be extruded and deformed when the crankshaft swings in the radial direction.

Preferably, the damping member is annular, and the damping member is sleeved on the crankshaft.

Preferably, the damping member comprises a flexible layer and a rigid layer from outside to inside along the radial direction of the damping member.

Preferably, a side wall of the rigid layer facing the crankshaft has a wear-reducing coating thereon.

Preferably, a first ring groove is formed at a position of the crankshaft corresponding to the damping member, a second ring groove is formed at a position of the bracket corresponding to the damping member, and an opening of the first ring groove is opposite to an opening of the second ring groove, so that the damping member can be simultaneously accommodated in the first ring groove and the second ring groove.

Preferably, the axial width of the first ring groove is h1, the axial width of the second ring groove is h0, the axial width of the damping piece is h, and h0 < h 1; and/or, the tank bottom of first annular groove with have first annular clearance between the hole wall of the hole of damping piece, first annular clearance's radial width is h2, the bent axle with have the second annular clearance between the bearing, the radial width of second annular clearance is h3, and 0.01mm is less than or equal to h3-h2 is less than or equal to 0.04 mm.

Preferably, the number of the damping members is two, and the two damping members are respectively arranged at two axial ends of the bearing.

Preferably, a third ring groove is further formed in the crankshaft, a fourth ring groove is further formed in the bracket, and an opening of the third ring groove is opposite to an opening of the fourth ring groove, so that the other of the two damping members can be simultaneously accommodated in the third ring groove and the fourth ring groove.

Preferably, the support includes the main part, be constructed the installation in the main part the dead eye of bearing, the axial both ends of dead eye are equipped with first mounting hole, second mounting hole respectively, first components of a whole that can function independently install in the first mounting hole, second components of a whole that can function independently install in the second mounting hole, be constructed on the first components of a whole that can function independently the second annular, be constructed on the second components of a whole that can function independently the fourth annular.

Preferably, the first sub-body is connected with the first mounting hole in an interference fit mode, and/or the second sub-body is connected with the second mounting hole in an interference fit mode.

Preferably, the crankshaft has a protruding ring extending in a radial direction thereof, the bracket is configured with a bearing hole for mounting the bearing, an axial gap is formed between the protruding ring and a bore wall of the bearing hole, and the damping member is mounted in the axial gap.

Preferably, the damping element is annular, the side of the collar facing the orifice wall being formed with a fifth annular groove, and/or the side of the orifice wall facing the collar being formed with a sixth annular groove, the damping element being partially located in the fifth annular groove and/or the sixth annular groove.

Preferably, the damping member is a cylinder, and the damping member has a plurality of first holes and/or second holes, and the side of the convex ring facing the orifice wall is configured with a plurality of first holes and/or second holes, and the plurality of damping members are located in the first holes and/or second holes in a one-to-one correspondence manner.

Preferably, the axial length of the axial gap is L1, the axial thickness of the damping piece is L2, and the axial thickness is more than or equal to 0.01mm and less than or equal to L1-L2 and less than or equal to 0.03 mm.

The invention also provides an air conditioner which comprises the scroll compressor.

According to the scroll compressor and the air conditioner, the damping piece is arranged between the crankshaft and the support, when the crankshaft swings in the radial direction, the crankshaft applies force to the damping piece, so that the damping piece is forced to deform, the deformed damping piece generates friction heat, the swinging vibration of the crankshaft is converted into the heat of the damping piece to be offset, and the vibration of a compressor shafting can be essentially reduced, the noise level of the compressor can be improved, and the operation reliability of the compressor can be improved.

Drawings

FIG. 1 is a schematic view of the internal structure of a scroll compressor according to one embodiment of the present invention;

FIG. 2 is a schematic structural view of the stent of FIG. 1;

FIG. 3 is a schematic structural view of the crankshaft of FIG. 1;

FIG. 4 is a schematic view of another embodiment of the stent of FIG. 1;

FIG. 5 is a schematic view of the structure of a bracket in a scroll compressor according to another embodiment of the present invention;

FIG. 6 is a schematic view of a crankshaft mated to the bracket of FIG. 5;

FIG. 7 is a schematic view of an alternative crankshaft configuration that matches the bracket of FIG. 5;

FIG. 8 is a schematic structural view (in plan view) of a bracket in a scroll compressor in accordance with yet another embodiment of the present invention;

fig. 9 is a schematic view of a crankshaft mated with the bracket of fig. 8.

The reference numerals are represented as:

1. a crankshaft; 11. a first ring groove; 12. a third ring groove; 13. a convex ring; 14. a fifth ring groove; 15. a first hole groove; 2. a support; 21. a second ring groove; 22. a fourth ring groove; 23. a main body; 24. a bearing bore; 25. a first mounting hole; 26. a second mounting hole; 27. a first split body; 28. a second body; 29. a sixth ring groove; 291. a second hole groove; 3. a bearing; 4. a damping member; 41. a flexible layer; 42. a rigid layer; 43. an antifriction coating; 100. a housing; 101. a lower bearing support; 102. a stator assembly; 103. a rotor assembly; 104. a movable scroll pan; 105. a static vortex disk.

Detailed Description

Referring to fig. 1 to 9 in combination, according to an embodiment of the present invention, there is provided a scroll compressor, which includes a housing 100, a crankshaft 1 and a bracket 2 sleeved on the crankshaft 1 are disposed in the housing 100, the bracket 2 is located between the housing 100 and the crankshaft 1, one end of the crankshaft 1 is connected to a movable scroll 104, the movable scroll 104 and a fixed scroll 105 form a crescent compression cavity as a pump body component of the compressor, the other end of the crankshaft 1 forms a rotary support through a lower bearing support 101 and forms an axial thrust to the crankshaft 1, the crankshaft 1 is further sleeved with a rotor assembly 103 and a stator assembly 102 sleeved on a circumferential outer side of the rotor assembly 103, a bearing 3 is disposed between the crankshaft 1 and the bracket 2, a damping member 4 is further disposed between the crankshaft 1 and the bracket 2, when the crankshaft 1 swings in a radial direction, the damping member 4 can be pressed to deform. In the technical scheme, the damping piece 4 is arranged between the crankshaft 1 and the support 2, when the crankshaft 1 swings in the radial direction, the crankshaft 1 applies force on the damping piece 4 to force the damping piece 4 to deform, the deformed damping piece 4 generates friction heat, and then the swinging vibration of the crankshaft 1 is converted into the heat of the damping piece 4 to be offset, so that the vibration of a compressor shafting can be reduced essentially, the noise level of the compressor is improved, and the operation reliability of the compressor is improved.

As a specific embodiment of the damping member 4, preferably, the damping member 4 is annular, and the damping member 4 is sleeved on the crankshaft 1. The damping element 4 may be implemented by a separate wear-resistant rubber ring, and preferably, the damping element 4 includes a flexible layer 41 and a rigid layer 42 from the outside to the inside in the radial direction. Specifically, the flexible layer 41 may be formed of rubber, and the rigid layer 42 may be formed of a steel sleeve, so that the damping member 4 forms a composite structure of flexible vibration damping and rigid wear resistance, thereby prolonging the service life thereof, and preferably, a side wall body of the rigid layer 42 facing the crankshaft 1 is provided with a wear-reducing coating 43, thereby reducing the friction loss between the rigid layer and the crankshaft 1. It will be appreciated that the rigid layer 42 is designed in such a way that the two anchor ears are integrally assembled, so that the damping member 4 is conveniently sleeved on the crankshaft 1.

In order to ensure the positional stability of the damping member 4, it is preferable that a first ring groove 11 is formed at a position of the crankshaft 1 corresponding to the damping member 4, a second ring groove 21 is formed at a position of the bracket 2 corresponding to the damping member 4, and an opening of the first ring groove 11 is disposed opposite to an opening of the second ring groove 21, so that the damping member 4 can be simultaneously accommodated in the first ring groove 11 and the second ring groove 21.

At this time, the axial width of the first ring groove 11 is h1, the axial width of the second ring groove 21 is h0, the axial width of the damping piece 4 is h, h0 < h1, that is, the end surface of the damping piece 4 and the bracket 2 form a close fit (e.g., interference), so that abrasion caused by relative motion between the flexible layer 41 of the damping piece 4 and the bracket 2 is effectively prevented, a gap is formed between the end surface of the damping piece 4 and the groove side wall of the first ring groove 11 of the crankshaft 1, and the motion abrasion of the crankshaft 1 rotating at a high speed to the damping piece 4 is prevented. The tank bottom of first annular 11 with first annular clearance has between the hole wall of the hole of damping piece 4, first annular clearance's radial width is h2, bent axle 1 with the second annular clearance has between the bearing 3, the radial width of second annular clearance is h3, and 0.01mm is less than or equal to h3-h2 is less than or equal to 0.04mm, thereby can pass through damping piece 4 is right bearing 3 forms the protection.

In some embodiments, there are two damping members 4, and the two damping members 4 are respectively located at two axial ends of the bearing 3. At this time, correspondingly, a third ring groove 12 is further configured on the crankshaft 1, a fourth ring groove 22 is further configured on the bracket 2, and an opening of the third ring groove 12 is opposite to an opening of the fourth ring groove 22, so that the other of the two damping members 4 can be simultaneously accommodated in the third ring groove 12 and the fourth ring groove 22. It can be understood that the gaps between the third ring groove 12 and the fourth ring groove 22 at the corresponding positions of the crankshaft 1, the damping member 4, and the bracket 2 are the same as those between the first ring groove 11 and the second ring groove 21, and are not described herein again.

In some embodiments, the bracket 2 includes a main body 23, the main body 23 is configured with a bearing hole 24 for mounting the bearing 3, both axial ends of the bearing hole 24 are respectively provided with a first mounting hole 25 and a second mounting hole 26, a first split body 27 is detachably mounted in the first mounting hole 25, a second split body 28 is detachably mounted in the second mounting hole 26, the first split body 27 is configured with the second ring groove 21, and the second split body 28 is configured with the fourth ring groove 22. In the technical scheme, a split assembly structure is adopted, so that the overall processing difficulty of parts can be reduced, that is, the second ring groove 21 and the fourth ring groove 22 can be independently processed respectively and then assembled with the main body 23 after the processing is finished. Specifically, the first sub-body 27 is connected with the first mounting hole 25 in an interference fit manner, and/or the second sub-body 28 is connected with the second mounting hole 26 in an interference fit manner.

In some embodiments, the crankshaft 1 has a protruding ring 13 extending in a radial direction thereof, the bracket 2 is configured with a bearing hole 24 for mounting the bearing 3, an axial gap is formed between the protruding ring and a hole wall of the bearing hole 24, and the damping member 4 is erected in the axial gap, that is, unlike the previous technical solution, the damping member 4 is located in the axial gap, so that the damping member 4 can achieve vibration damping and can objectively form a thrust against an axial play of the crankshaft 1.

In this case, as an embodiment of the damping element 4, the damping element 4 is annular, the side of the collar 13 facing the orifice wall being formed with a fifth ring groove 14 and/or the side of the orifice wall facing the collar 13 being formed with a sixth ring groove 29, the damping element 4 being partially located in the fifth ring groove 14 and/or the sixth ring groove 29. As another suitable embodiment of the damper 4, the damper 4 is a cylinder, and the damper 4 has a plurality of first holes 15 are formed on the side of the collar 13 facing the orifice wall, and/or a plurality of second holes 291 are formed on the side of the orifice wall facing the collar 13, and a plurality of dampers 4 are located in the first holes 15 and/or the second holes 291 in a one-to-one correspondence.

At this time, the axial length of the axial gap is L1, the axial thickness of the damping member 4 is L2, and L1-L2 are equal to or greater than 0.03mm and greater than or equal to 0.01mm, that is, when the damping member 4 is located in the axial gap, the two axial ends of the damping member 4 are not simultaneously in contact with the orifice wall and the convex ring 13, and when the crankshaft 1 axially moves or radially swings, the damping member 4 is simultaneously in contact with the orifice wall and the convex ring 13, so that vibration damping and buffering are realized.

According to an embodiment of the invention, an air conditioner is also provided, which comprises the scroll compressor.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A scroll compressor, characterized in that it comprises a crankshaft (1) and a bracket (2) sleeved on the crankshaft (1), and a bracket (2) is provided between the crankshaft (1) and the bracket (2). A bearing (3) is provided, and a damping member (4) is also provided between the crankshaft (1) and the bracket (2). When the crankshaft (1) swings radially, the damping member (4) Can be squeezed out of shape.

2 . The scroll compressor according to claim 1 , wherein the damping member ( 4 ) is annular, and the damping member ( 4 ) is sleeved on the crankshaft ( 1 ). 3 .

3 . The scroll compressor according to claim 2 , wherein the damping member ( 4 ) comprises a flexible layer ( 41 ) and a rigid layer ( 42 ) from outside to inside along its radial direction. 4 .

4. The scroll compressor according to claim 3, characterized in that, a side wall of the rigid layer (42) facing the crankshaft (1) is provided with a wear-reducing coating (43).

5. The scroll compressor according to claim 2, characterized in that a first annular groove (11) is configured at a position corresponding to the crankshaft (1) and the damping member (4), and the bracket (2) ) A second ring groove (21) is configured at a position corresponding to the damping member (4), and the opening of the first ring groove (11) is arranged opposite to the opening of the second ring groove (21), so that the The damping member (4) can be accommodated in the first annular groove (11) and the second annular groove (21) at the same time.

6. The scroll compressor according to claim 5, wherein the axial width of the first annular groove (11) is h1, the axial width of the second annular groove (21) is h0, The axial width of the damping member (4) is h, h0<h<h1; and/or, the groove bottom of the first annular groove (11) and the inner hole wall of the damping member (4) are between There is a first annular gap between them, the radial width of the first annular gap is h2, there is a second annular gap between the crankshaft (1) and the bearing (3), and the radial width of the second annular gap is h2. The width is h3, 0.01mm≤h3-h2≤0.04mm.

7. The scroll compressor according to claim 5, characterized in that there are two damping members (4), and the two damping members (4) are located in the axial direction of the bearing (3) respectively. both ends.

8. The scroll compressor according to claim 7, wherein a third annular groove (12) is further configured on the crankshaft (1), and a fourth annular groove is further configured on the bracket (2) (22), the opening of the third ring groove (12) is arranged opposite to the opening of the fourth ring groove (22), so that the other one of the two damping members (4) can be simultaneously accommodated in the into the third annular groove (12) and the fourth annular groove (22).

9 . The scroll compressor according to claim 8 , wherein the bracket ( 2 ) comprises a main body ( 23 ), and the main body ( 23 ) is formed with a bearing hole ( 9 ) for installing the bearing ( 3 ). 24), the axial ends of the bearing hole (24) are respectively provided with a first mounting hole (25) and a second mounting hole (26), and the first split body (27) is detachably mounted on the first mounting hole (27). Inside the mounting hole (25), the second split body (28) is detachably mounted in the second mounting hole (26), and the first split body (27) is formed with the second ring groove (21). ), the fourth ring groove (22) is configured on the second split body (28).

10 . The scroll compressor according to claim 9 , wherein the first split body ( 27 ) and the first mounting hole ( 25 ) are connected with interference fit, and/or the The second split body (28) is connected with the second mounting hole (26) by interference fit.

11. The scroll compressor according to claim 1, characterized in that, the crankshaft (1) has a convex ring (13) extending along its radial direction, and the bracket (2) is configured to install the The bearing hole (24) of the bearing (3), an axial gap is formed between the convex ring (13) and the wall of the bore of the bearing hole (24), and the damping member (4) is erected on the shaft into the gap.

12 . The scroll compressor according to claim 11 , wherein the damping member ( 4 ) is annular, and the convex ring ( 13 ) is configured with a fifth ring on the side facing the orifice wall. 13 . The groove (14), and/or, the side of the orifice wall body facing the convex ring (13) is configured with a sixth ring groove (29), and the damping member (4) is partially located in the fifth ring in the groove (14) and/or the sixth annular groove (29).

13 . The scroll compressor according to claim 11 , wherein the damping member ( 4 ) is a cylinder, and the damping member ( 4 ) has a plurality of numbers, and the convex ring ( 13 ) faces the One side of the orifice wall body is configured with a plurality of first hole grooves (15), and/or a side of the orifice wall body facing the convex ring (13) is configured with a plurality of second hole grooves (15). 291), a plurality of the damping members (4) are located in the plurality of the first hole grooves (15) and/or the second hole grooves (291) in a one-to-one correspondence.

14. The scroll compressor according to claim 12 or 13, wherein the axial length of the axial gap is L1, the axial thickness of the damping member (4) is L2, and 0.01mm≤L1 -L2≤0.03mm.

15. An air conditioner comprising a scroll compressor, wherein the scroll compressor is the scroll compressor of any one of claims 1 to 14.