Sealing device for scroll compressor of automobile air conditioner

Abstract

The utility model relates to the field of automobile air conditioners, in particular to a sealing device for a scroll compressor of an automobile air conditioner, which is characterized by comprising a movable scroll plate, a static scroll plate and a sealing strip. Sealing grooves are formed in the scroll teeth of the movable scroll plate and the static scroll plate in the direction of the scroll teeth. And the movable scroll plate and the static scroll plate are oppositely mounted and are sealed in the cylinder body by the rear cover. And a sealing strip is arranged in the sealing groove. A concave-convex structure is arranged on the surface of the sealing strip. According to the sealing device for the scroll compressor of the automobile air conditioner, the concave-convex structure is arranged on the surface of the sealing strip, so that the friction surface can be continuously lubricated and cooled on the premise of ensuring sealing, the friction coefficient of the sealing strip to the bottom of a movable scroll plate and the bottom of a static scroll plate during high-speed movement is reduced, and the friction force of the friction surface is reduced; and abrasion particles generated on the bottom surfaces of the movable and static scroll plates can be stored, and the friction state of two materials with the same hardness is avoided, so that the service life of the compressor is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of automobile air conditioners, in particular to a sealing device for a scroll compressor of an automobile air conditioner. Background Art

[0002] The orbiting scroll of an electric scroll compressor is driven by an eccentric shaft, causing it to rotate and translate around the fixed scroll. The scroll teeth of the orbiting and fixed scrolls mesh with each other, forming multiple pairs of crescent-shaped volume chambers. As the orbiting scroll rotates, the volume of the crescent-shaped volume chambers gradually decreases toward the center of the scroll. The low-pressure refrigerant drawn in is continuously compressed within the crescent-shaped volume chambers. Finally, the compressed high-temperature, high-pressure refrigerant is discharged through the exhaust hole in the center of the fixed scroll into the high-pressure chamber in the rear cover.

[0003] The sealing effect of the axial gap at the top of the compression chamber of the scroll compressor is an important factor in ensuring that the compressor can work normally and reliably. In the previous design of electric scroll compressors, wear-resistant sealing strips with high surface finish and flatness are generally installed on the relative friction surfaces of the movable and static scroll plates. However, as the movable scroll plate moves, such wear-resistant sealing strips are driven to move together, thereby clearing the cooling oil on the friction surface, which increases the wear of the compressor and increases power consumption. On the other hand, after long-term operation, the wear particles generated at the bottom of the movable and static scroll plates are coated on the contact surface of the sealing strip, and two friction states with the same hardness and material are formed between the bottom of the movable and static scroll plates and the contact surface of the sealing strip, which will accelerate the fatigue wear of the movable and static scroll plates, reduce the service life of the compressor, and bring hidden dangers to the normal operation of the compressor. Utility Model Content

[0004] The purpose of the utility model is to provide a sealing device for a scroll compressor of an automobile air conditioner, which solves the problems existing in the prior art through a special structural design.

[0005] The utility model provides a sealing device for a scroll compressor of an automobile air conditioner, characterized in that it comprises a movable scroll, a stationary scroll and a sealing strip; sealing grooves are provided on the scroll teeth of the movable scroll and the stationary scroll along the direction of the scroll teeth; the movable scroll and the stationary scroll are installed relative to each other and sealed inside the cylinder body by a rear cover; the sealing strip is installed in the sealing groove; and a concave-convex structure is provided on the surface of the sealing strip.

[0006] Furthermore, the concave-convex structure forms an oil storage groove and a chip storage groove; the oil storage groove and the chip storage groove are both distributed along the axial direction of the sealing strip.

[0007] Furthermore, the oil storage grooves are continuously distributed on the surface of the sealing strip.

[0008] Furthermore, the oil storage tank includes a plurality of inclined grooves; the inclined grooves are distributed in a spiral along the surface of the sealing strip, and the spiral direction is the axial direction of the sealing strip.

[0009] Furthermore, the length of the spiral distribution of the inclined groove is consistent with the length of the sealing strip, and the depth of the inclined groove is preferably 0.1 mm.

[0010] Furthermore, the chip accumulation grooves are discretely distributed on the surface of the sealing strip.

[0011] Furthermore, the chip accumulation groove includes a plurality of dot-shaped grooves; the plurality of dot-shaped grooves are discretely distributed on the surface of the sealing strip; and the linear direction formed by the combination of the plurality of dot-shaped grooves is distributed axially along the sealing strip.

[0012] Furthermore, the depth of the dot-shaped grooves is preferably 0.15 mm to 0.2 mm.

[0013] Furthermore, in the orbiting scroll, the length of the sealing strip is smaller than the length of the volute; and the starting position of the sealing strip is close to the center position of the orbiting scroll.

[0014] Furthermore, in the fixed scroll, the length of the sealing strip matches the length of the volute; and the starting position of the sealing strip fits in the center position of the fixed scroll.

[0015] The sealing device for the scroll compressor of an automobile air conditioner of the utility model has the following remarkable features compared with the prior art by providing a concave-convex structure on the surface of the sealing strip:

[0016] 1. When the utility model is working, the concave-convex structure is used to store cooling oil, which can continuously lubricate and cool the friction surface while ensuring sealing, reducing the friction coefficient of the sealing strip on the bottom of the orbiting and static scroll when the high-speed movement is achieved, reducing the friction force of the friction surface, improving the reliability of the orbiting and static scrolls, and extending the working life of the compressor;

[0017] 2. The concave-convex structure of the present invention can also store wear particles generated on the bottom surface of the movable and static scrolls after long-term friction between the bottom of the movable and static scrolls and the sealing strip surface, avoiding the friction state of two materials with the same hardness, thereby extending the working life of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a preferred embodiment of the utility model electronic sealing device for automobile air-conditioning scroll compressor;

[0019] Figure 2 This is a side structural diagram of a movable scroll in a preferred embodiment of the sealing device for a scroll compressor of an automobile air conditioner of the utility model;

[0020] Figure 3This is a front structural schematic diagram of a movable scroll in a preferred embodiment of the sealing device for a scroll compressor of an automobile air conditioner of the utility model;

[0021] Figure 4 This is a side structural diagram of a fixed scroll in a preferred embodiment of the sealing device for a scroll compressor of an automobile air conditioner of the utility model;

[0022] Figure 5 This is a front structural schematic diagram of a fixed scroll in a preferred embodiment of the sealing device for a scroll compressor of an automobile air conditioner of the utility model;

[0023] Figure 6 The utility model is a structural schematic diagram of a sealing strip in a preferred embodiment of a sealing device for a scroll compressor of an automobile air conditioner.

[0024] Among them, 1-orbiting scroll, 2-stationary scroll, 3-sealing strip, 4-cylinder body, 5-rear cover, 6-scroll gear;

[0025] 31- oblique groove, 32- dot groove. DETAILED DESCRIPTION

[0026] The specific embodiments of the present invention will be described below with reference to the accompanying drawings. Example

[0027] See also Figures 1 to 6 The utility model discloses a sealing device for a scroll compressor of an automobile air conditioner. A preferred embodiment thereof comprises an orbiting scroll 1, a fixed scroll 2 and a sealing strip 3.

[0028] In an automotive air-conditioning scroll compressor, an orbiting scroll 1 and a fixed scroll 2 are mounted relative to each other within a cylinder body 4, sealed within the cylinder body 4 by a rear cover 5. Matching volutes 6 are provided on each orbiting scroll 1 and fixed scroll 2. Seal grooves are provided along the paths of the volutes 6. Sealing strips 3 are installed within these grooves.

[0029] In the present invention, the surface of the sealing strip 3 is not smooth, but is provided with a concave-convex structure. These concave-convex structures are located on the surface of the sealing strip 3, forming an oil storage tank and a chip storage tank. The oil storage tank and the chip storage tank are distributed along the axial direction of the sealing strip 3, covering the entire sealing strip 3. Among them, when the movable scroll 1 and the fixed scroll 2 move relative to each other, the refrigerant oil can be stored in the oil storage tank, and is applied to the friction surface of the movable scroll 1 and the fixed scroll 2 as the movement progresses. While cooling the movable scroll 1 and the fixed scroll 2, the friction coefficient is also reduced, and the friction surface is kept lubricated. The chip storage tank is mainly used to collect particles that fall off the sealing strip 3 due to friction, preventing them from continuing to rub against the sealing strip 3, thereby improving the sealing performance while also protecting the sealing strip 3.

[0030] Please refer to Figures 2 to 5 , the movable scroll 1 will move horizontally during operation, and the sealing strip 3 must ensure that it can be covered by the fixed scroll 2 at all positions of the movable scroll 1. Therefore, in the movable scroll 1, the length of the sealing strip 3 is less than the length of the scroll tooth 6. The starting position of the sealing strip 3 is as close as possible to the center position of the movable scroll, that is, the starting position of the scroll tooth 6. Similarly, in the fixed scroll 2, the length of the sealing strip 3 is also required to be able to cover the movable scroll 1 under any working state. However, in the fixed scroll 2, the length of the scroll tooth 6 is relatively short, so the length of the sealing strip 3 is preferably consistent with the scroll tooth 6, and as equal to the length of the scroll tooth 6 as possible. Similarly, in the fixed scroll 2, the starting position of the sealing strip 3 fits the center position of the fixed scroll 2, that is, the starting position of the scroll tooth 6.

[0031] Please refer to Figure 6 In this embodiment, the oil storage tank and chip accumulation groove formed by the concave-convex structure are both honeycomb groove structures. The oil storage tank is constructed as a plurality of inclined grooves 31. The inclined grooves 31 are linear, and while advancing along the axial direction of the sealing strip 3, they also rotate around the axial center of the sealing strip 3, forming a spiral distribution on the surface of the sealing strip 3. The length of the spiral distribution of the inclined grooves 31 on the sealing strip 3 is consistent with the length of the sealing strip 3, and the depth is preferably 0.1 mm. Similarly, the chip accumulation groove is constructed as a plurality of point-shaped grooves 32. A single point-shaped groove 32 is a point, but the combination of multiple point-shaped grooves 32 forms a linear direction and is also distributed axially on the surface of the sealing strip 3. The depth of the point-shaped grooves 32 is preferably 0.15 mm to 0.2 mm. During operation, the cooling oil entering the inclined grooves 31 is pushed by the sealing strip 3 and flows along the inclined grooves 31, thereby lubricating a larger area. The sealing strip debris collected by the point-shaped grooves 32 is confined to the single point-shaped groove 32, reducing friction with the medium.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. In other words, any equivalent changes and modifications made within the scope of the patent application of the present invention should fall within the technical scope of the present invention.

Claims

1. A sealing device for a scroll compressor of an automobile air conditioner, characterized in that: It comprises an orbiting scroll, a fixed scroll and a sealing strip; a sealing groove is provided on the scroll teeth of the orbiting scroll and the fixed scroll along the direction of the scroll teeth; the orbiting scroll and the fixed scroll are installed relative to each other and sealed inside the cylinder body by a rear cover; the sealing strip is installed in the sealing groove; and a concave-convex structure is provided on the surface of the sealing strip.

2. The sealing device for a scroll compressor of an automobile air conditioner according to claim 1, wherein: The concave-convex structure forms an oil storage groove and a chip storage groove; the oil storage groove and the chip storage groove are both distributed along the axial direction of the sealing strip.

3. The sealing device for a scroll compressor of an automobile air conditioner according to claim 2, wherein: The oil storage grooves are continuously distributed on the surface of the sealing strip.

4. The sealing device for a scroll compressor of an automobile air conditioner according to claim 3, wherein: The oil storage tank includes a plurality of inclined grooves; the inclined grooves are spirally distributed along the surface of the sealing strip, and the spiral direction is the axial direction of the sealing strip.

5. The sealing device for a scroll compressor of an automobile air conditioner according to claim 4, wherein: The length of the spiral distribution of the inclined groove is consistent with the length of the sealing strip, and the depth of the inclined groove is 0.1 mm.

6. The sealing device for a scroll compressor of an automobile air conditioner according to claim 2, wherein: The chip accumulation grooves are discretely distributed on the surface of the sealing strip.

7. The sealing device for a scroll compressor of an automobile air conditioner according to claim 6, wherein: The chip accumulation groove comprises a plurality of dot-shaped grooves; the plurality of dot-shaped grooves are discretely distributed on the surface of the sealing strip; and the linear direction formed by the combination of the plurality of dot-shaped grooves is distributed along the axial direction of the sealing strip.

8. The sealing device for a scroll compressor of an automobile air conditioner according to claim 7, wherein: The depth of the dot-shaped grooves is 0.15 mm to 0.2 mm.

9. The sealing device for a scroll compressor of an automobile air conditioner according to claim 1, wherein: In the movable scroll, the length of the sealing strip is smaller than the length of the volute; and the starting position of the sealing strip is close to the center position of the movable scroll.

10. The sealing device for a scroll compressor of an automobile air conditioner according to claim 1, wherein: In the fixed scroll, the length of the sealing strip matches the length of the volute; and the starting position of the sealing strip is aligned with the center position of the fixed scroll.

Images