Plane damping structure for inverter compressor

Abstract

The utility model discloses a plane damping structure for an inverter compressor, which comprises a machine body and a crankshaft rotationally connected to the machine body, a plane bearing is arranged on the crankshaft, and a damping gasket is arranged between the plane bearing and the machine body. According to the damping gasket, the plane bearing can be tightly attached to a machine body, the damping gasket plays a role in buffering between the plane bearing and the machine body, axial movement of the plane bearing can be restrained when the compressor runs at a high speed, vibration and noise of the bearing in the running process are reduced, and therefore the running stability of equipment is improved. The damping gasket can play a buffering role between the plane bearing and the machine body and reduce abrasion, in addition, the contact area between the plane bearing and the plane bearing supporting face on the machine body can be increased, axial pressure distribution of the plane bearing is balanced, local accelerated abrasion caused by uneven stress of the plane bearing is prevented, and therefore the service life of the plane bearing is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a refrigeration compressor field more specifically, it relates to a kind of planar damping structure for variable frequency compressor. BACKGROUND

[0002] Compressor is the core device of refrigerator, air conditioner and other refrigeration equipment, and the crankshaft in the compressor outputs after compressing refrigerant.Usually, planar bearing is arranged between crankshaft and the body of compressor, and under high speed state, when planar bearing axially moves, bearing end face will collide and rub with the bottom of internal cavity of body, and then noise and vibration are generated, and even it can also cause planar bearing to run off or excessive wear.Therefore, the existing compressor still needs to be improved to eliminate the above problems.The utility model patent with publication number CN203640962U discloses a kind of compressor crankshaft rotating assembly, but the utility model mainly reduces the friction between crankshaft and body when rotating by setting oilless bushing between lower shaft and body, so it solves the noise and wear problem between crankshaft surface and body, not between planar bearing end face and the bottom of internal cavity of body. SUMMARY

[0003] Under high speed state, planar bearing will generate noise and vibration due to axial movement, and even it can also cause planar bearing to run off or excessive wear, in order to overcome these defects, the utility model provides a kind of planar damping structure for variable frequency compressor, which can reduce noise and vibration of planar bearing during operation, prolong the service life of planar bearing and improve the running stability of equipment.

[0004] The technical scheme of the utility model is: a kind of planar damping structure for variable frequency compressor, including body and crankshaft rotationally connected on the body, planar bearing is arranged on the crankshaft, and damping washer is arranged between planar bearing and the body.The damping washer is made of relatively soft non-metallic material, such damping washer not only can make planar bearing and the body closely adhere, but also can play a buffering role between planar bearing and the body, when the compressor is operated at high speed, damping washer can inhibit the axial movement of planar bearing, reduce the impact degree between planar bearing and the body, and the close adhesion between damping washer and planar bearing can also increase the contact area between planar bearing and planar bearing support surface, so as to reduce noise and vibration of planar bearing during operation, balance the axial pressure distribution of planar bearing, prevent local accelerated wear caused by uneven stress of planar bearing, prolong the service life of planar bearing and improve the running stability of equipment.

[0005] As preferred, bearing radial positioning ring is arranged on the body, and planar bearing is adapted to be sleeved on the bearing radial positioning ring.Planar bearing is sleeved on the bearing radial positioning ring, which can realize the radial positioning of planar bearing on the body.

[0006] As preferred, the crankshaft sleeve is coaxial with the bearing radial positioning ring, and the crankshaft rotates through the crankshaft sleeve.

[0007] As preferred, the bearing support surface is located at the periphery of the bearing radial positioning ring, and the damping pad is adapted to be closely attached to the bearing support surface.

[0008] As preferred, the crankshaft sleeve is integrally formed with the crankcase.

[0009] As preferred, the crankshaft is provided with a spiral oil groove.

[0010] As preferred, the damping pad is a paper piece.

[0011] As an alternative, the damping pad is a plastic piece.

[0012] The beneficial effects of the present utility model are as follows:

[0013] The damping pad can not only closely attach the plain bearing to the crankcase, but also buffer the plain bearing and the crankcase, so that the axial movement of the plain bearing can be inhibited when the compressor is running at high speed, the vibration and noise of the bearing during operation can be reduced, and the running stability of the equipment can be improved.

[0014] The damping pad can buffer the plain bearing and the crankcase, so that the wear can be reduced, the contact area between the plain bearing and the bearing support surface of the crankcase can be increased, the axial pressure distribution of the plain bearing can be balanced, the local accelerated wear of the plain bearing caused by uneven force can be prevented, and the service life of the bearing can be prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 A structural schematic view of the present utility model.

[0016] Figure 2 A parts explosion view of the present utility model.

[0017] In the figure: 1 - body, 2 - crankshaft, 3 - plain bearing, 4 - damping washer, 5 - crankshaft sleeve, 6 - bearing radial positioning ring, 7 - bearing support surface, 8 - spiral oil groove, 9 - cylinder head, 10 - circular recess, 11 - shaft hole. DETAILED DESCRIPTION

[0018] The utility model will be further described in connection with the specific embodiments of the drawings.

[0019] Example 1

[0020] As shown in Figure 1 , Figure 2 , a flat damping structure for variable frequency compressor, including body 1, crankshaft 2, plain bearing 3 and damping washer 4. One end of body 1 is integrally provided with cylinder head 9, and a cylinder hole is formed in cylinder head 9, and the top of body 1 has a sunken circular recess 10, and the center of circular recess 10 is provided with a shaft hole 11. Bearing radial positioning ring 6 is arranged in circular recess 10 of body 1, bearing radial positioning ring 6 is integrally formed with body 1 and protrudes from the bottom of circular recess 10, bearing radial positioning ring 6 is coaxial with shaft hole 11, and the inner diameter of bearing radial positioning ring 6 is equal to the inner diameter of shaft hole 11, and plain bearing 3 is adaptively connected outside bearing radial positioning ring 6. Bearing support surface 7 is also arranged in circular recess 10 of body 1, bearing support surface 7 is located at the bottom of circular recess 10 outside bearing radial positioning ring 6, bearing support surface 7 is annular, the radial dimension of bearing support surface 7 is equal to the radial dimension of plain bearing 3, annular bearing support surface 7 is coaxial with bearing radial positioning ring 6, bearing support surface 7 also protrudes from the bottom of circular recess 10 and is finely polished to tightly fit with damping washer 4. Crankshaft sleeve 5 is arranged at the bottom of body 1, crankshaft sleeve 5 is integrally formed with body 1 and coaxial with bearing radial positioning ring 6, and the inner diameter of crankshaft sleeve 5 is equal to the inner diameter of shaft hole 11.

[0021] The crankshaft 2 comprises a main shaft, a cam and an eccentric shaft, which are integrally formed, the cam is approximately in the shape of a sector, the cam rotates in a circular cavity 10, the arc surface of the cam is in close contact with the cavity wall of the circular cavity 10, the main shaft and the eccentric shaft are parallel and connected to two surfaces of the cam respectively, and the eccentric shaft is offset to the edge of the cam. The main shaft of the crankshaft 2 rotates through the crankshaft sleeve 5, so that the crankshaft 2 is rotationally connected to the engine block 1. A crankshaft drive shaft enters from the shaft hole 11 and is in driving connection with the main shaft of the crankshaft 2, and the eccentric shaft of the crankshaft 2 drives a piston to reciprocate in the cylinder hole of the cylinder head 2 through a connecting rod, so as to realize the compression of the refrigerant. The crankshaft 2 is provided with a spiral oil groove 8, which is spirally wound on the main shaft of the crankshaft 2. The plain bearing 3 comprises an upper washer, a retainer assembly and a lower washer, the retainer assembly is clamped between the upper washer and the lower washer, the upper washer and the lower washer are both annular steel sheets, the retainer assembly further comprises a retainer and rollers, the retainer is also annular, and the rollers are rollingly embedded on the retainer and are uniformly distributed in a circle around the axis of the retainer. The shock pad 4 is made of paper, and the interwoven fiber structure of the paper enables the shock pad 4 to have a certain elasticity, so as to ensure that the shock pad 4 can play a role when it is placed between the lower washer of the plain bearing 3 and the bearing support surface 7.

[0022] When the compressor is running at high speed, the shock pad 4 can inhibit the axial movement of the plain bearing 3, reduce the impact force between the plain bearing 3 and the engine block 1, and the close contact between the shock pad 4 and the plain bearing 3 can also increase the contact area between the plain bearing 3 and the plain bearing support surface 7, thereby reducing the noise and vibration of the plain bearing 3 during operation, balancing the axial pressure distribution of the plain bearing 3, preventing local accelerated wear of the plain bearing 3 due to uneven stress, prolonging the service life of the plain bearing 3, and improving the running stability of the compressor.

[0023] Example 2:

[0024] The invention discloses a planar damping structure for variable frequency compressor, which comprises a body 1, a crankshaft 2, a planar bearing 3 and a damping gasket 4. One end of the body 1 is integrally provided with a cylinder head 9, and a cylinder hole is formed in the cylinder head 9. The top of the body 1 is provided with a sunken circular cavity 10, and an axle hole 11 is formed in the center of the circular cavity 10. A bearing radial positioning ring 6 is arranged in the circular cavity 10 of the body 1. The bearing radial positioning ring 6 is integrally formed with the body 1 and protrudes from the bottom of the circular cavity 10. The bearing radial positioning ring 6 is coaxial with the axle hole 11, and the inner diameter of the bearing radial positioning ring 6 is equal to the inner diameter of the axle hole 11. The planar bearing 3 is adapted to be sleeved outside the bearing radial positioning ring 6. A bearing supporting surface 7 is further arranged in the circular cavity 10 of the body 1. The bearing supporting surface 7 is located at the bottom of the circular cavity 10 outside the bearing radial positioning ring 6. The bearing supporting surface 7 is annular, and the radial dimension of the bearing supporting surface 7 is equal to the radial dimension of the planar bearing 3. The annular bearing supporting surface 7 is coaxial with the bearing radial positioning ring 6. The bearing supporting surface 7 also protrudes from the bottom of the circular cavity 10 and is finely polished to tightly fit with the damping gasket 4. The bottom of the body 1 is provided with a crankshaft sleeve 5. The crankshaft sleeve 5 is integrally formed with the body 1 and coaxial with the bearing radial positioning ring 6. The inner diameter of the crankshaft sleeve 5 is equal to the inner diameter of the axle hole 11.

[0025] The crankshaft 2 comprises a main shaft, a cam and an eccentric shaft. The main shaft, the cam and the eccentric shaft are integrally formed. The cam is approximately fan-shaped. The cam rotates in the circular cavity 10. The arc surface of the cam tightly fits with the cavity wall of the circular cavity 10. The main shaft and the eccentric shaft are parallel and connected to two surfaces of the cam respectively. The eccentric shaft is offset to the near edge of the cam. The main shaft of the crankshaft 2 rotates and is connected in the crankshaft sleeve 5, so that the crankshaft 2 is connected to the body 1. A crankshaft driving shaft enters from the axle hole 11 and forms a transmission connection with the main shaft of the crankshaft 2. The eccentric shaft of the crankshaft 2 drives a piston to reciprocate in the cylinder hole of the cylinder head 2 through a connecting rod, so as to realize the compression of refrigerant. The crankshaft 2 is provided with a spiral oil groove 8. The spiral oil groove 8 is spirally wound on the main shaft of the crankshaft 2. The planar bearing 3 comprises an upper gasket, a retainer assembly and a lower gasket. The retainer assembly is clamped between the upper gasket and the lower gasket. The upper gasket and the lower gasket are annular steel sheets. The retainer assembly further comprises a retainer and rollers. The retainer is also annular. The rollers are rollingly embedded on the retainer and are uniformly distributed in a circle around the axis of the retainer. Different from the embodiment 1, the damping gasket 4 in the embodiment is made of plastic. The high molecular material characteristics of the plastic make the damping gasket 4 have a certain elasticity, so as to ensure that the damping gasket 4 plays a role when it is placed between the lower gasket of the planar bearing 3 and the bearing supporting surface 7. The rest is the same as the embodiment 1.

[0026] When the compressor is running at high speed, the damping gasket 4 can inhibit the axial movement of the plane bearing 3, reduce the impact between the plane bearing 3 and the body 1, and the close fit between the damping gasket 4 and the plane bearing 3 can also increase the contact area between the plane bearing 3 and the plane bearing support surface 7, thereby reducing the noise and vibration of the plane bearing 3 during operation, balancing the axial pressure distribution of the plane bearing 3, preventing local accelerated wear of the plane bearing 3 due to uneven stress, prolonging the service life of the plane bearing 3, and improving the running stability of the compressor.

[0027] Example 3:

[0028] A plane damping structure for a variable frequency compressor, comprising a body 1, a crankshaft 2, a plane bearing 3 and a damping gasket 4. One end of the body 1 is integrally provided with a cylinder head 9, the cylinder head 9 is provided with a cylinder hole, and the top of the body 1 has a sunken circular recess 10, and the center of the circular recess 10 is provided with a shaft hole 11. A bearing radial positioning ring 6 is arranged in the circular recess 10 of the body 1, the bearing radial positioning ring 6 is integrally formed with the body 1 and protrudes from the bottom of the circular recess 10, the bearing radial positioning ring 6 is coaxial with the shaft hole 11 and the inner diameter of the bearing radial positioning ring 6 is equal to the inner diameter of the shaft hole 11, and the plane bearing 3 is adapted to be connected to the outside of the bearing radial positioning ring 6. A bearing support surface 7 is also arranged in the circular recess 10 of the body 1, the bearing support surface 7 is located at the bottom of the circular recess 10 outside the bearing radial positioning ring 6, the bearing support surface 7 is annular, the radial dimension of the bearing support surface 7 is equal to the radial dimension of the plane bearing 3, the annular bearing support surface 7 is coaxial with the bearing radial positioning ring 6, the bearing support surface 7 also protrudes from the bottom of the circular recess 10 and is finely polished to closely fit with the damping gasket 4. The bottom of the body 1 is provided with a crankshaft sleeve 5, the crankshaft sleeve 5 is integrally formed with the body 1 and coaxial with the bearing radial positioning ring 6, and the inner diameter of the crankshaft sleeve 5 is equal to the inner diameter of the shaft hole 11.

[0029] The crankshaft 2 comprises a main shaft, a cam and an eccentric shaft, which are integrally formed, the cam is approximately in the shape of a sector, the cam rotates in a circular cavity 10, the arc surface of the cam is in close contact with the cavity wall of the circular cavity 10, the main shaft and the eccentric shaft are parallel and connected to two surfaces of the cam respectively, and the eccentric shaft is offset to the edge of the cam. The main shaft of the crankshaft 2 rotates through the crankshaft sleeve 5, so that the crankshaft 2 is rotationally connected to the engine block 1. A crankshaft drive shaft enters from the shaft hole 11 and is in driving connection with the main shaft of the crankshaft 2, and the eccentric shaft of the crankshaft 2 drives a piston to reciprocate in the cylinder hole of the cylinder head 2 through a connecting rod, so as to realize compression of the refrigerant. The crankshaft 2 is provided with a spiral oil groove 8, which is spirally wound on the main shaft of the crankshaft 2. The plain bearing 3 comprises an upper washer, a retainer assembly and a lower washer, the retainer assembly is clamped between the upper washer and the lower washer, the upper washer and the lower washer are both annular steel sheets, the retainer assembly further comprises a retainer and rollers, the retainer is also annular, and the rollers are rollingly embedded in the retainer and are uniformly distributed in a circle around the axis of the retainer. Different from embodiment 1, the damping washer 4 in this embodiment is made of rubber, and the high molecular substance characteristics of the rubber make the damping washer 4 have a certain elasticity, so as to ensure that the damping washer 4 can play a role when it is placed between the lower washer of the plain bearing 3 and the bearing support surface 7. The rest is the same as embodiment 1.

[0030] When the compressor is running at high speed, the damping washer 4 can inhibit the axial movement of the plain bearing 3, reduce the impact force between the plain bearing 3 and the engine block 1, and the close fit between the damping washer 4 and the plain bearing 3 can also increase the contact area between the plain bearing 3 and the plain bearing support surface 7, thereby reducing the noise and vibration of the plain bearing 3 during operation, balancing the axial pressure distribution of the plain bearing 3, preventing local accelerated wear of the plain bearing 3 due to uneven stress, prolonging the service life of the plain bearing 3, and improving the running stability of the compressor.

[0031] Embodiment 4:

[0032] The invention discloses a planar damping structure for variable frequency compressor, which comprises a body 1, a crankshaft 2, a planar bearing 3 and a damping gasket 4. One end of the body 1 is integrally provided with a cylinder head 9, the cylinder head 9 is provided with a cylinder hole, the top of the body 1 is provided with a sunken circular cavity 10, and the center of the circular cavity 10 is provided with a shaft hole 11. The circular cavity 10 of the body 1 is provided with a bearing radial positioning ring 6, the bearing radial positioning ring 6 is integrally formed with the body 1 and protrudes from the bottom of the circular cavity 10, the bearing radial positioning ring 6 is coaxial with the shaft hole 11 and the inner diameter of the bearing radial positioning ring 6 is equal to the inner diameter of the shaft hole 11, and the planar bearing 3 is adapted to be sleeved outside the bearing radial positioning ring 6. The circular cavity 10 of the body 1 is also provided with a bearing supporting surface 7, the bearing supporting surface 7 is located at the bottom of the circular cavity 10 outside the bearing radial positioning ring 6, the bearing supporting surface 7 is annular, the radial dimension of the bearing supporting surface 7 is equal to the radial dimension of the planar bearing 3, the annular bearing supporting surface 7 is coaxial with the bearing radial positioning ring 6, and the bearing supporting surface 7 is finely polished to tightly fit the damping gasket 4. Different from the embodiment 2, the bearing supporting surface 7 is directly formed on the bottom of the circular cavity 10 in the embodiment instead of protruding from the bottom of the circular cavity 10. The bottom of the body 1 is provided with a crankshaft sleeve 5, the crankshaft sleeve 5 is integrally formed with the body 1 and coaxial with the bearing radial positioning ring 6, and the inner diameter of the crankshaft sleeve 5 is equal to the inner diameter of the shaft hole 11.

[0033] The crankshaft 2 comprises a main shaft, a cam and an eccentric shaft, the main shaft, the cam and the eccentric shaft are integrally formed, the cam is approximately fan-shaped, the cam rotates in the circular cavity 10, the arc surface of the cam tightly fits the cavity wall of the circular cavity 10, the main shaft and the eccentric shaft are parallel and connected to two surfaces of the cam respectively, and the eccentric shaft is offset to the near edge of the cam. The main shaft of the crankshaft 2 rotates and penetrates into the crankshaft sleeve 5, so that the crankshaft 2 is rotationally connected to the body 1. A crankshaft driving shaft enters from the shaft hole 11 and forms a transmission connection with the main shaft of the crankshaft 2, the eccentric shaft of the crankshaft 2 drives a piston to reciprocate in the cylinder hole of the cylinder head 2 through a connecting rod, so as to realize the compression of refrigerant. The crankshaft 2 is provided with a spiral oil groove 8, the spiral oil groove 8 spirally winds on the main shaft of the crankshaft 2. The planar bearing 3 comprises an upper gasket, a retainer assembly and a lower gasket, the retainer assembly is clamped between the upper gasket and the lower gasket, the upper gasket and the lower gasket are annular steel sheets, the retainer assembly further comprises a retainer and a roller, the retainer is also annular, and the roller is rollingly embedded on the retainer and is uniformly distributed in a circle around the axis of the retainer. The damping gasket 4 is made of plastic, the high molecular material characteristics of the plastic enable the damping gasket 4 to have certain elasticity, so as to ensure that the damping gasket 4 plays a role when being placed between the lower gasket of the planar bearing 3 and the bearing supporting surface 7. The rest is the same as the embodiment 2.

[0034] When the compressor is running at high speed, the damping pad 4 can inhibit the axial movement of the plane bearing 3, reduce the impact force between the plane bearing 3 and the body 1, and the close fit between the damping pad 4 and the plane bearing 3 can also increase the contact area between the plane bearing 3 and the plane bearing support surface 7, thereby reducing the noise and vibration of the plane bearing 3 during operation, balancing the axial pressure distribution of the plane bearing 3, preventing local accelerated wear of the plane bearing 3 due to uneven stress, prolonging the service life of the plane bearing 3, and improving the running stability of the compressor.

Claims

1. A planar damping structure for a variable frequency compressor, comprising a body (1) and a crankshaft (2) rotatably connected to the body (1), a planar bearing (3) being provided on the crankshaft (2), characterized in that, A damping gasket (4) is arranged between the planar bearing (3) and the body (1).

2. The planar damping structure for a variable frequency compressor according to claim 1, characterized in that, The body (1) is provided with a bearing radial positioning ring (6), and the planar bearing (3) is adapted to be sleeved on the bearing radial positioning ring (6).

3. The planar damping structure for a variable frequency compressor according to claim 2, characterized in that, The body (1) is provided with a crankshaft sleeve (5) coaxial with the bearing radial positioning ring (6), and the crankshaft (2) is rotatably connected in the crankshaft sleeve (5).

4. The planar damping structure for a variable frequency compressor according to claim 2, wherein The body (1) is provided with a bearing supporting surface (7), the bearing supporting surface (7) is located at the periphery of the bearing radial positioning ring (6), and the damping gasket (4) is adapted to be attached to the bearing supporting surface (7).

5. The planar damping structure for a variable frequency compressor according to claim 2, wherein The crankshaft sleeve (5) is integrally formed with the body (1).

6. The planar damping structure for a variable frequency compressor according to claim 1, wherein The crankshaft (2) is provided with a spiral oil groove (8).

7. The planar damping structure for a variable frequency compressor according to any one of claims 1 to 6, characterized in that, The damping gasket (4) is a paper product.

8. The planar damping structure for a variable frequency compressor according to any one of claims 1 to 6, characterized in that, The damping gasket (4) is a plastic product.

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