Scroll compressor, air conditioner

Abstract

The present invention provides a scroll compressor and an air conditioner, wherein the scroll compressor comprises a crankshaft and a bracket mounted on the crankshaft, a bearing is provided between the crankshaft and the bracket, and a damping member is also provided between the crankshaft and the bracket, and when the crankshaft undergoes radial swing, the damping member can be squeezed and deformed. According to the present invention, the damping member is provided between the crankshaft and the bracket, and when the crankshaft undergoes radial swing, the crankshaft will exert force on the damping member, thereby forcing the damping member to deform, and the deformed damping member will generate friction heat, thereby converting the swing vibration of the crankshaft into the heat of the damping member to offset it, which can essentially reduce the vibration of the compressor shaft system, improve the noise level of the compressor, and improve the operating reliability of the compressor.

Description

Technical Field

[0001] The invention belongs to the technical field of compressor manufacturing, and in particular relates to a scroll compressor and an air conditioner. Background Art

[0002] For scroll compressors, the compression process of the pump body is driven by the crankshaft. At the same time, in order to ensure the smooth operation of the shaft system, two bearing structures (upper bearing and lower bearing) are generally set to constrain it. However, during the operation of the shaft system, due to the fluctuation of the load during the rotation cycle, the shaft system will produce a certain degree of radial swing, and the vibration caused by this swing will be absorbed by the bearing. Usually, the vibration absorbed by the bearing will be transmitted to the compressor casing, and then generate noise and release it into the air.

[0003] In order to reduce the noise generated by the shaft swing, sound insulation cotton is usually pasted on the outside of the compressor or a special external sound insulation cover is set up to reduce the compressor noise. These treatment methods are to set vibration reduction and damping structures on the outside of the compressor to reduce the vibration of the compressor, thereby reducing the noise level of the compressor. It does not fundamentally reduce the vibration level of the compressor itself and cannot improve the operating reliability of the compressor itself. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to provide a scroll compressor and an air conditioner to overcome the shortcomings of the prior art that the vibration level of the compressor itself cannot be reduced and the operating reliability of the compressor itself cannot be improved by setting a shock-absorbing and noise-reducing component on the outside of the compressor.

[0005] In order to solve the above problems, the present invention provides a scroll compressor, including a crankshaft and a bracket mounted on the crankshaft, a bearing is provided between the crankshaft and the bracket, and a damping member is also provided between the crankshaft and the bracket. When the crankshaft swings radially, the damping member can be squeezed and deformed.

[0006] Preferably, the damping member is annular and is sleeved on the crankshaft.

[0007] Preferably, the damping element comprises a flexible layer and a rigid layer from outside to inside along its radial direction.

[0008] Preferably, a friction-reducing coating is provided on a side wall of the rigid layer facing the crankshaft.

[0009] Preferably, a first annular groove is constructed at a position of the crankshaft corresponding to the damping member, and a second annular groove is constructed at a position of the bracket corresponding to the damping member, and an opening of the first annular groove and an opening of the second annular groove are arranged opposite to each other so that the damping member can be accommodated in the first annular groove and the second annular groove at the same time.

[0010] Preferably, the axial width of the first annular groove is h1, the axial width of the second annular groove is h0, the axial width of the damping element is h, h0<h

[0011] Preferably, two damping members are provided, and the two damping members are respectively located at two axial ends of the bearing.

[0012] Preferably, a third annular groove is further constructed on the crankshaft, and a fourth annular groove is further constructed on the bracket, and the opening of the third annular groove is arranged opposite to the opening of the fourth annular groove, so that the other of the two damping members can be accommodated in the third annular groove and the fourth annular groove at the same time.

[0013] Preferably, the bracket includes a main body, a bearing hole for mounting the bearing is constructed on the main body, a first mounting hole and a second mounting hole are respectively provided at two axial ends of the bearing hole, the first split body is detachably mounted in the first mounting hole, the second split body is detachably mounted in the second mounting hole, the first split body is constructed on the second ring groove, and the second split body is constructed on the fourth ring groove.

[0014] Preferably, the first sub-body is connected to the first mounting hole by an interference fit, and / or the second sub-body is connected to the second mounting hole by an interference fit.

[0015] Preferably, the crankshaft has a convex ring extending in its radial direction, the bracket is configured with a bearing hole for mounting the bearing, an axial gap is formed between the convex ring and the orifice wall of the bearing hole, and the damping member is mounted in the axial gap.

[0016] Preferably, the damping member is annular, a fifth annular groove is formed on the side of the convex ring facing the orifice wall, and / or a sixth annular groove is formed on the side of the orifice wall facing the convex ring, and the damping member is partially located in the fifth annular groove and / or the sixth annular groove.

[0017] Preferably, the damping member is a cylinder, and the damping member has multiple, the side of the convex ring facing the orifice wall is constructed with multiple first hole grooves, and / or the side of the orifice wall facing the convex ring is constructed with multiple second hole grooves, and the multiple damping members are located in the multiple first hole grooves and / or second hole grooves one by one.

[0018] ​Preferably, the axial length of the axial gap is L1, the axial thickness of the damping element is L2, and 0.01 mm ≤ L1 - L2 ≤ 0.03 mm.

[0019] The present invention also provides an air conditioner, comprising the scroll compressor.

[0020] The present invention provides a scroll compressor and an air conditioner, in which the damping member is arranged between the crankshaft and the bracket. When the crankshaft radially swings, the crankshaft will exert force on the damping member, thereby forcing the damping member to deform. The deformed damping member will generate friction heat, and then convert the swinging vibration of the crankshaft into the heat of the damping member to offset it, which can essentially reduce the vibration of the compressor shaft system, improve the compressor noise level, and improve the operating reliability of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the internal structure of a scroll compressor according to an embodiment of the present invention;

[0022] Figure 2 for Figure 1 Schematic diagram of the structure of the middle bracket;

[0023] Figure 3 for Figure 1 Schematic diagram of the structure of the middle crankshaft;

[0024] Figure 4 for Figure 1 A schematic structural diagram of another embodiment of the middle bracket;

[0025] Figure 5 A schematic structural diagram of a bracket in a scroll compressor according to another embodiment of the present invention;

[0026] Figure 6 For Figure 5 A schematic diagram of the structure of a crankshaft matched with a bracket in the embodiment;

[0027] Figure 7 For Figure 5 A schematic diagram of the structure of another crankshaft matched with the bracket in FIG.

[0028] Figure 8 A schematic structural diagram of a support in a scroll compressor according to another embodiment of the present invention (top view);

[0029] Fig. 9 For Figure 8 Schematic diagram of the structure of a crankshaft matched with the bracket in FIG.

[0030] The reference numerals are:

[0031] 1. crankshaft; 11. first ring groove; 12. third ring groove; 13. convex ring; 14. fifth ring groove; 15. first hole groove; 2. bracket; 21. second ring groove; 22. fourth ring groove; 23. main body; 24. bearing hole; 25. first mounting hole; 26. second mounting hole; 27. first sub-body; 28. second sub-body; 29. ​​sixth ring groove; 291. second hole groove; 3. bearing; 4. damping element; 41. flexible layer; 42. rigid layer; 43. friction-reducing coating; 100. housing; 101. lower bearing support; 102. stator assembly; 103. rotor assembly; 104. movable scroll; 105. static scroll. DETAILED DESCRIPTION

[0032] See also Figures 1 to 9 As shown, according to an embodiment of the present invention, a scroll compressor is provided, including a shell 100, in which a crankshaft 1 and a bracket 2 mounted on the crankshaft 1 are arranged, the bracket 2 is located between the shell 100 and the crankshaft 1, one end of the crankshaft 1 is connected to a movable scroll 104, a crescent-shaped compression chamber is formed between the movable scroll 104 and the fixed scroll 105, which is matched as a pump body component of the compressor, the other end of the crankshaft 1 is supported by a lower bearing 101 to form a rotation support and an axial thrust for the crankshaft 1, the crankshaft 1 is also mounted with a rotor assembly 103 and a stator assembly 102 mounted on the circumferential outer side of the rotor assembly 103, a bearing 3 is provided between the crankshaft 1 and the bracket 2, and a damping member 4 is also provided between the crankshaft 1 and the bracket 2, and when the crankshaft 1 swings radially, the damping member 4 can be squeezed and deformed. In this technical solution, the damping member 4 is arranged between the crankshaft 1 and the bracket 2. When the crankshaft 1 swings radially, the crankshaft 1 will exert force on the damping member 4, thereby forcing the damping member 4 to deform. The deformed damping member 4 will generate friction heat, and then convert the swinging vibration of the crankshaft 1 into the heat of the damping member 4 to offset it, which can essentially reduce the vibration of the compressor shaft system, improve the compressor noise level, and improve the operating reliability of the compressor.

[0033] As a specific embodiment of the damping member 4, preferably, the damping member 4 is annular, and the damping member 4 is mounted on the crankshaft 1. In this case, the damping member 4 can be implemented by a separate wear-resistant rubber ring. Preferably, the damping member 4 includes a flexible layer 41 and a rigid layer 42 along its radial direction from the outside to the inside. Specifically, the flexible layer 41 can be formed of rubber, and the rigid layer 42 can be formed of a steel sleeve, so that the damping member 4 forms a composite structure of flexible vibration reduction and rigid wear resistance, thereby improving its service life. Preferably, the rigid layer 42 has a wear-reducing coating 43 on one side wall facing the crankshaft 1, thereby reducing the friction loss between it and the crankshaft 1. It can be understood that the rigid layer 42 is designed to be assembled into two clamps so that the damping member 4 can be conveniently mounted on the crankshaft 1.

[0034] In order to ensure the position stability of the damping member 4, preferably, a first annular groove 11 is constructed at a position of the crankshaft 1 corresponding to the damping member 4, and a second annular groove 21 is constructed at a position of the bracket 2 corresponding to the damping member 4, and an opening of the first annular groove 11 and an opening of the second annular groove 21 are arranged opposite to each other, so that the damping member 4 can be accommodated in the first annular groove 11 and the second annular groove 21 at the same time.

[0035] At this time, the axial width of the first annular groove 11 is h1, the axial width of the second annular groove 21 is h0, and the axial width of the damping member 4 is h, h0<h

[0036] ​In some embodiments, two damping members 4 are provided, and the two damping members 4 are respectively located at the axial ends of the bearing 3. At this time, correspondingly, a third annular groove 12 is also configured on the crankshaft 1, and a fourth annular groove 22 is also configured on the bracket 2. The opening of the third annular groove 12 is arranged opposite to the opening of the fourth annular groove 22, so that the other of the two damping members 4 can be accommodated in the third annular groove 12 and the fourth annular groove 22 at the same time. It can be understood that the gap setting between the third annular groove 12 and the fourth annular groove 22 at the corresponding positions of the crankshaft 1, the damping member 4, and the bracket 2 is the same as that of the first annular groove 11 and the second annular groove 21, and will not be repeated here.

[0037] In some embodiments, the bracket 2 includes a main body 23, a bearing hole 24 for mounting the bearing 3 is configured on the main body 23, a first mounting hole 25 and a second mounting hole 26 are respectively provided at two axial ends of the bearing hole 24, 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 annular groove 21, and the second split body 28 is configured with the fourth annular groove 22. In this technical solution, the split assembly structure is adopted to reduce the difficulty of overall processing of the parts, that is, the second annular groove 21 and the fourth annular groove 22 can be processed independently, and then assembled with the main body 23 after processing. Specifically, the first split body 27 and the first mounting hole 25 are connected by interference fit, and / or the second split body 28 and the second mounting hole 26 are connected by interference fit.

[0038] In some embodiments, the crankshaft 1 has a convex ring 13 extending along its radial direction, and the bracket 2 is configured with a bearing hole 24 for mounting the bearing 3, and an axial gap is formed between the convex ring and the orifice wall of the bearing hole 24, and the damping member 4 is mounted in the axial gap. That is, this technical solution is different from the aforementioned technical solution in that the damping member 4 is in the axial gap, so that the damping member 4 can achieve vibration reduction while objectively forming a thrust against the axial movement of the crankshaft 1.

[0039] At this time, as an adapted embodiment of the damping member 4, the damping member 4 is annular, the side of the convex ring 13 facing the orifice wall is configured with a fifth annular groove 14, and / or the side of the orifice wall facing the convex ring 13 is configured with a sixth annular groove 29, and the damping member 4 is partially located in the fifth annular groove 14 and / or the sixth annular groove 29. As another adapted embodiment of the damping member 4, the damping member 4 is cylindrical, and the damping member 4 has a plurality of first apertures 15, the side of the convex ring 13 facing the orifice wall is configured with a plurality of second apertures 291, and the plurality of damping members 4 are located in the plurality of first apertures 15 and / or the plurality of second apertures 291 in a one-to-one correspondence.

[0040] At this time, the axial length of the axial gap is L1, the axial thickness of the damping element 4 is L2, 0.01mm≤L1-L2≤0.03mm, that is, when the damping element 4 is in the axial gap, the axial ends of the damping element 4 are not in contact with the orifice wall and the convex ring 13 at the same time, and when the crankshaft 1 moves axially or swings radially, the damping element 4 will contact with the orifice wall and the convex ring 13 at the same time, thereby achieving vibration reduction and buffering.

[0041] According to an embodiment of the present invention, there is also provided an air conditioner, comprising the scroll compressor described above.

[0042] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention, and these improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A scroll compressor, characterized in that: The invention comprises a crankshaft (1) and a bracket (2) sleeved on the crankshaft (1); a bearing (3) is arranged between the crankshaft (1) and the bracket (2); a damping member (4) is also arranged between the crankshaft (1) and the bracket (2); when the crankshaft (1) undergoes radial swing, the damping member (4) can be squeezed and deformed; the damping member (4) is annular and sleeved on the crankshaft (1); the damping member (4) comprises a flexible layer (41) and a rigid layer (42) along its radial direction from outside to inside; a first annular groove (11) is constructed at a position corresponding to the crankshaft (1) and the damping member (4); a second annular groove (21) is constructed at a position corresponding to the bracket (2) and the damping member (4); the first annular groove (11) is provided at a position corresponding to the first annular groove (21); The opening of the first annular groove (11) is arranged opposite to the opening of the second annular groove (21), so that the damping member (4) can be accommodated in the first annular groove (11) and the second annular groove (21) at the same time; 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, and h0<h<h1; and / or, a first annular gap is provided between the groove bottom of the first annular groove (11) and the inner hole wall of the damping member (4), the radial width of the first annular gap is h2, and a second annular gap is provided between the crankshaft (1) and the bearing (3), the radial width of the second annular gap is h3, and 0.01mm≤h3-h2≤0.04mm.

2. The scroll compressor according to claim 1, characterized in that: A friction-reducing coating (43) is provided on a side wall of the rigid layer (42) facing the crankshaft (1).

3. The scroll compressor according to claim 1, characterized in that: Two damping members (4) are provided, and the two damping members (4) are respectively located at two axial ends of the bearing (3).

4. The scroll compressor according to claim 3, characterized in that: The crankshaft (1) is also provided with a third annular groove (12), and the bracket (2) is also provided with a fourth annular groove (22), wherein an opening of the third annular groove (12) and an opening of the fourth annular groove (22) are arranged opposite to each other, so that the other of the two damping members (4) can be accommodated in the third annular groove (12) and the fourth annular groove (22) at the same time.

5. The scroll compressor according to claim 4, characterized in that: The bracket (2) comprises a main body (23), the main body (23) is provided with a bearing hole (24) for installing the bearing (3), the axial ends of the bearing hole (24) are respectively provided with a first mounting hole (25) and a second mounting hole (26), the first sub-body (27) is detachably mounted in the first mounting hole (25), the second sub-body (28) is detachably mounted in the second mounting hole (26), the first sub-body (27) is provided with the second annular groove (21), and the second sub-body (28) is provided with the fourth annular groove (22).

6. The scroll compressor according to claim 5, characterized in that: The first sub-body (27) is connected to the first mounting hole (25) by an interference fit, and / or the second sub-body (28) is connected to the second mounting hole (26) by an interference fit.

7. An air conditioner, comprising a scroll compressor, characterized in that: The scroll compressor is the scroll compressor according to any one of claims 1 to 6.

Images