Thrust ball bearing for compressor

Abstract

A thrust ball bearing for a compressor belongs to the field of refrigerating system parts and comprises a shaft washer, a seat washer, a steel ball and a retainer, the seat washer, the shaft washer and the retainer are in a sheet shape formed by stamping, the upper end face of the seat washer and the lower end face of the shaft washer are respectively provided with corresponding annular channels, the annular channels are ground, and the steel ball is arranged in the annular channels. The lower end face of the seat ring and the upper end face of the shaft ring form a plane part and annular protruding parts corresponding to the annular channels of the plane part and the shaft ring respectively. The steel ball is supported and installed between the seat ring and the shaft ring through the retainer, the upper end face of the retainer correspondingly faces the shaft ring, the lower end face of the retainer correspondingly faces the seat ring, the upper end face and the lower end face of the retainer are respectively provided with an annular turnup, and the annular turnups correspond to the annular protruding parts of the shaft ring and the seat ring and are bent towards the annular protruding parts. And the annular turned-over edge is pressed against the annular convex part. The thrust ball bearing solves the problem that steel balls of an existing thrust ball bearing for the compressor are prone to dislocation, noise and energy consumption are reduced, and stability is improved.

Description

Technical Field

[0001] The present invention belongs to the field of bearings, and particularly relates to a thrust ball bearing for a compressor. Background Art

[0002] Components such as refrigeration compressors usually use thrust ball bearings to support the rotation of the shaft. The existing thrust ball bearings for compressors consist of a seat ring, a shaft ring, a cage, and steel balls supported by the cage and installed between the seat ring and the shaft ring. The seat ring, the shaft ring, and the cage are all flat plates. Generally, no raceways are provided on the seat ring and the shaft ring, and the seat ring, the shaft ring, and the cage are three-piece separable. When the rotational speed is relatively high, the generated noise is relatively large, the energy consumption is high, and when axial movement occurs, the positions of the steel balls are prone to misalignment, resulting in a sudden increase in noise at a certain moment. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defect that the positions of the steel balls of the existing thrust ball bearings for compressors are prone to misalignment, and to provide a thrust ball bearing for a compressor with low energy consumption, low noise, and good stability.

[0004] To this end, the present invention adopts the following technical solutions: A thrust ball bearing for a compressor, including a shaft ring, a seat ring, steel balls, and a cage. The shaft ring and the seat ring are axially arranged at a certain distance. The steel balls and the cage are arranged between the shaft ring and the seat ring. The characteristic is that the seat ring, the shaft ring, and the cage are all thin sheet-shaped formed by stamping. Corresponding annular raceways are respectively provided on the upper end surface of the seat ring and the lower end surface of the shaft ring. The annular raceways are processed by grinding. The lower end surface of the seat ring and the upper end surface of the shaft ring form a flat portion and an annular convex portion corresponding to the respective annular raceways. The steel balls are supported and installed between the seat ring and the shaft ring through the cage. The upper end surface of the cage corresponds to face the shaft ring, and the lower end surface of the cage corresponds to face the seat ring. Annular flanges are respectively provided on the upper end surface and the lower end surface of the cage. The annular flanges correspond to the annular convex portions of the shaft ring and the seat ring and are bent towards the annular convex portions. The annular flanges are pressed against the annular convex portions.

[0005] As a supplement and improvement to the above technical solutions, the present invention further includes the following technical features.

[0006] The annular convex portions of the shaft ring and the seat ring are both located on the outer side in the radial direction, and the annular flanges are both located on the outer rings of the upper end surface and the lower end surface of the cage.

[0007] The annular convex portions of the shaft ring and the seat ring are both located on the inner side in the radial direction, and the annular flanges are both located on the inner rings of the upper end surface and the lower end surface of the cage.

[0008] The annular raised portion of the shaft ring is located on the outer side, the annular raised portion of the seat ring is located on the radial inner side, an annular flange is provided on the outer ring of the upper end face of the cage, and an annular flange is provided on the inner ring of the lower end face of the cage.

[0009] The annular raised portion of the shaft ring is located on the inner side, the annular raised portion of the seat ring is located on the radial outer side, an annular flange is provided on the inner ring of the upper end face of the cage, and an annular flange is provided on the outer ring of the lower end face of the cage.

[0010] The following beneficial effects can be achieved by using the present invention: by stamping and forming the thin sheet-shaped seat ring and shaft ring to form grooves corresponding to the steel balls, and then grinding the grooving tool, the dislocation of the steel ball position is effectively prevented, the sliding of the steel balls is reduced, the noise is reduced, and the energy consumption is reduced; by providing flanges on the cage to form annular flanges that press against the annular raised portions of the shaft ring and the seat ring, the cage, the steel balls, the seat ring and the shaft ring are formed into a whole, improving the stability. Description of the Drawings

[0011] Figure 1 It is a schematic cross-sectional view of the first specific embodiment of the present invention.

[0012] Figure 2 It is a schematic cross-sectional view of the second specific embodiment of the present invention.

[0013] Figure 3 It is a schematic cross-sectional view of the third specific embodiment of the present invention.

[0014] Figure 4 It is a schematic cross-sectional view of the fourth specific embodiment of the present invention. Embodiments

[0015] The following describes the specific embodiments of the present invention in detail with reference to the drawings.

[0016] Specific Embodiment 1: As Figure 1As shown in the figure, the thrust ball bearing for a compressor according to the present invention includes an inner ring 3, an outer ring 2, steel balls 1, and a cage 4. The inner ring and the outer ring are axially arranged at a certain distance apart. The steel balls and the cage are disposed between the inner ring and the outer ring. The outer ring, the inner ring, and the cage are all thin sheet-shaped formed by stamping. Corresponding annular grooves are respectively provided on the upper end surface of the outer ring 2 and the lower end surface of the inner ring 3. The annular grooves are processed by grinding. The lower end surface of the outer ring 2 and the upper end surface of the inner ring 3 form a flat portion and an annular convex portion corresponding to their respective annular grooves. The annular convex portions of the inner ring and the outer ring are both located on the radial outer side. The steel balls 1 are supported and installed between the outer ring 2 and the inner ring 3 by the cage 4. The upper end surface of the cage faces the inner ring correspondingly, and the lower end surface of the cage faces the outer ring correspondingly. An upper annular flange 5 is provided on the upper end surface of the cage, and a lower annular flange 6 is provided on the lower end surface of the cage. The upper annular flange and the lower annular flange are both located on the outer ring of the cage. The upper annular flange is bent towards the annular convex portion of the inner ring and pressed against the annular convex portion of the inner ring. The lower annular flange is bent towards the annular convex portion of the outer ring and pressed against the annular convex portion of the outer ring.

[0017] Specific Embodiment 2: As Figure 2 As shown in the figure, the thrust ball bearing for a compressor according to the present invention includes an inner ring 3, an outer ring 2, steel balls 1, and a cage 4. The inner ring and the outer ring are axially arranged at a certain distance apart. The steel balls and the cage are disposed between the inner ring and the outer ring. The outer ring, the inner ring, and the cage are all thin sheet-shaped formed by stamping. Corresponding annular grooves are respectively provided on the upper end surface of the outer ring 2 and the lower end surface of the inner ring 3. The annular grooves are processed by grinding. The lower end surface of the outer ring 2 and the upper end surface of the inner ring 3 form a flat portion and an annular convex portion corresponding to their respective annular grooves. The annular convex portions of the inner ring and the outer ring are both located on the radial inner side. The steel balls 1 are supported and installed between the outer ring 2 and the inner ring 3 by the cage 4. The upper end surface of the cage faces the inner ring correspondingly, and the lower end surface of the cage faces the outer ring correspondingly. An upper annular flange 5 is provided on the upper end surface of the cage, and a lower annular flange 6 is provided on the lower end surface of the cage. The upper annular flange and the lower annular flange are both located on the inner ring of the cage. The upper annular flange is bent towards the annular convex portion of the inner ring and pressed against the annular convex portion of the inner ring. The lower annular flange is bent towards the annular convex portion of the outer ring and pressed against the annular convex portion of the outer ring.

[0018] Specific Embodiment 3: As Figure 3As shown in the figure, the thrust ball bearing for a compressor according to the present invention includes an inner ring 3, an outer ring 2, steel balls 1, and a cage 4. The inner ring and the outer ring are axially arranged at a certain distance. The steel balls and the cage are arranged between the inner ring and the outer ring. The outer ring, the inner ring, and the cage are all thin sheet-shaped formed by stamping. Corresponding annular grooves are respectively provided on the upper end surface of the outer ring 2 and the lower end surface of the inner ring 3. The annular grooves are processed by grinding. The lower end surface of the outer ring 2 and the upper end surface of the inner ring 3 form a flat portion and an annular convex portion corresponding to their respective annular grooves. The annular convex portion of the inner ring is located on the radial outer side, and the annular convex portion of the outer ring is located on the radial inner side. The steel balls 1 are supported and installed between the outer ring 2 and the inner ring 3 through the cage 4. The upper end surface of the cage faces the inner ring correspondingly, and the lower end surface of the cage faces the outer ring correspondingly. An upper annular flange 5 is provided on the upper end surface of the cage, and a lower annular flange 6 is provided on the lower end surface of the cage. The upper annular flange is located on the outer circle of the cage, and the lower annular flange is located on the inner circle of the cage. The upper annular flange is bent towards the annular convex portion of the inner ring and presses against the annular convex portion of the inner ring. The lower annular flange is bent towards the annular convex portion of the outer ring and presses against the annular convex portion of the outer ring.

[0019] Specific Embodiment 4: As Figure 4 As shown in the figure, the thrust ball bearing for a compressor according to the present invention includes an inner ring 3, an outer ring 2, steel balls 1, and a cage 4. The inner ring and the outer ring are axially arranged at a certain distance. The steel balls and the cage are arranged between the inner ring and the outer ring. The outer ring, the inner ring, and the cage are all thin sheet-shaped formed by stamping. Corresponding annular grooves are respectively provided on the upper end surface of the outer ring 2 and the lower end surface of the inner ring 3. The annular grooves are processed by grinding. The lower end surface of the outer ring 2 and the upper end surface of the inner ring 3 form a flat portion and an annular convex portion corresponding to their respective annular grooves. The annular convex portion of the inner ring is located on the radial inner side, and the annular convex portion of the outer ring is located on the radial outer side. The steel balls 1 are supported and installed between the outer ring 2 and the inner ring 3 through the cage 4. The upper end surface of the cage faces the inner ring correspondingly, and the lower end surface of the cage faces the outer ring correspondingly. An upper annular flange 5 is provided on the upper end surface of the cage, and a lower annular flange 6 is provided on the lower end surface of the cage. The upper annular flange is located on the inner circle of the cage, and the lower annular flange is located on the outer circle of the cage. The upper annular flange is bent towards the annular convex portion of the inner ring and presses against the annular convex portion of the inner ring. The lower annular flange is bent towards the annular convex portion of the outer ring and presses against the annular convex portion of the outer ring.

Claims

1. Thrust ball bearing for compressor, comprising an inner ring, an outer ring, steel balls and a cage, the inner ring and the outer ring are axially arranged at a certain distance, and the steel balls and the cage are arranged between the inner ring and the outer ring, characterized in that: The described seat ring, shaft ring and cage are all sheet-shaped formed by stamping. Corresponding annular grooves are respectively provided on the upper end surface of the seat ring and the lower end surface of the shaft ring. The annular grooves are processed by grinding. A flat portion and an annular convex portion corresponding to the respective annular grooves are formed on the lower end surface of the seat ring and the upper end surface of the shaft ring. The steel balls are supported and installed between the seat ring and the shaft ring through the cage. The upper end surface of the cage faces the shaft ring correspondingly, and the lower end surface of the cage faces the seat ring correspondingly. Annular flanges are respectively provided on the upper end surface and the lower end surface of the cage. The annular flanges correspond to the annular convex portions of the shaft ring and the seat ring and are bent towards the annular convex portions. The annular flanges are pressed against the annular convex portions.

2. The thrust ball bearing for a compressor according to claim 1, characterized in that: The annular convex portions of the shaft ring and the seat ring are both located on the radial outer side, and the annular flanges are both located on the outer rings of the upper end surface and the lower end surface of the cage.

3. The thrust ball bearing for a compressor according to claim 1, characterized in that: The annular convex portions of the shaft ring and the seat ring are both located on the radial inner side, and the annular flanges are both located on the inner rings of the upper end surface and the lower end surface of the cage.

4. The thrust ball bearing for a compressor according to claim 1, characterized in that: The annular convex portion of the shaft ring is located on the outer side, and the annular convex portion of the seat ring is located on the radial inner side. An annular flange is provided on the outer ring of the upper end surface of the cage, and an annular flange is provided on the inner ring of the lower end surface of the cage.

5. The thrust ball bearing for a compressor according to claim 1, characterized in that: The annular convex portion of the shaft ring is located on the inner side, and the annular convex portion of the seat ring is located on the radial outer side. An annular flange is provided on the inner ring of the upper end surface of the cage, and an annular flange is provided on the outer ring of the lower end surface of the cage.

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