Compressor with lubricating oil cooling structure and front cover thereof

Abstract

The compressor with the lubricating oil cooling structure comprises a static disc and a movable disc which are meshed together, the back face of the static disc is a high-pressure cavity, the front cover is arranged on the back face of the movable disc, the front cover comprises a large end of a plane structure and a small end with an inner cavity, and the back face of the movable disc is connected with an eccentric sleeve. The eccentric sleeve and the movable disc are connected through a sliding bearing, the sliding bearing is located in a cavity of the front cover, annularly-arranged cooling fins are arranged on the back face of the large end of the front cover, an annular sealing gasket is arranged between the cooling fins and the front cover, and an oil inlet hole and an oil return hole are formed in the upper position and the lower position of the large end of the front cover respectively. The oil inlet hole and the oil return hole are through holes and are close to the inner edge of the annular sealing gasket, and the oil inlet hole is communicated with an oil return channel on the static disc. Refrigeration oil flowing back from the high-pressure cavity is guided into the space between the heat dissipation fins and the back face of the front cover through the oil inlet hole, and after the refrigeration oil is cooled through the heat dissipation fins, the refrigeration oil flows back to the inner cavity of the front cover through the oil return hole.

Description

Technical Field

[0001] This utility model relates to a compressor with a lubricating oil cooling structure and its front cover, belonging to the technical field of automotive air conditioning electric compressors. Background Technology

[0002] Electric compressors are commonly used in automotive air conditioning systems. These compressors consist of a stationary disc and a moving disc meshing together. A rear cover is mounted on the back of the stationary disc, and a front cover is mounted on the back of the moving disc. A drive bearing passes through the center hole of the front cover and connects to the moving disc. A sliding bearing is located between an eccentric sleeve and the moving disc, using the eccentric sleeve to drive the moving disc's rotation. Because sliding bearings, compared to rolling bearings, rely entirely on an oil film formed on their surface to avoid direct friction with the main shaft, the lubrication requirements are significantly increased. Since the bearing of the eccentric sleeve is located in the front cover cavity, the refrigerant oil returning from the high-pressure zone, due to its high temperature, would experience a significant decrease in viscosity if it returned directly to the front cover cavity. This prevents the formation of an effective oil film on the sliding bearing surface, resulting in reduced lubrication performance between the main shaft and the sliding bearing. This, in turn, affects the compressor's operating efficiency and generates noise. Utility Model Content

[0003] The purpose of this invention is to provide a compressor with a lubricating oil cooling structure and its front cover, in order to solve the technical problem that the high-temperature refrigeration oil discharged from the high-pressure zone of the compressor in the prior art has low viscosity and cannot form an effective oil film on the surface of the sliding bearing.

[0004] The compressor with a lubricating oil cooling structure of this utility model adopts the following technical solution: A compressor with a lubricating oil cooling structure includes a stationary disc and a moving disc meshed together. The back of the stationary disc is a high-pressure chamber, and the back of the moving disc is provided with a front cover. The front cover includes a large end with a planar structure and a small end with an inner cavity. An eccentric sleeve is connected to the back of the moving disc and passes through the small end of the front cover. A sliding bearing is provided between the eccentric sleeve and the moving disc. The sliding bearing is located in the cavity of the front cover. The back of the large end of the front cover is provided with annularly arranged heat dissipation fins. An annular sealing gasket is provided between the heat dissipation fins and the front cover. An oil inlet hole and an oil return hole are respectively provided at the upper and lower positions of the large end of the front cover. Both the oil inlet hole and the oil return hole are through holes and are close to the inner edge of the annular sealing gasket. The oil inlet hole is connected to the oil return channel on the stationary disc.

[0005] The large end has an oil return groove on its front side that communicates with the oil return hole. The oil return groove extends from the oil return hole into the inner cavity of the small end and is set obliquely upward.

[0006] The large end has an oil inlet groove on its front side that communicates with the oil inlet port, and the oil inlet groove is arranged vertically.

[0007] The heat exchange fins are provided with concentrically spaced annular heat dissipation fins; the heat dissipation fins are fixedly connected to the front cover by bolts, and the annular sealing gasket is clamped between the heat dissipation fins and the front cover.

[0008] The axes of the oil inlet and oil return holes are both parallel to the axis of the main shaft.

[0009] The front cover of the compressor with a lubricating oil cooling structure of this utility model adopts the following technical solution: A front cover of a compressor with a lubricating oil cooling structure, the front cover includes a large end with a planar structure and a small end with an inner cavity. The back of the large end is provided with annularly arranged heat dissipation fins. An annular sealing gasket is provided between the heat dissipation fins and the front cover. An oil inlet hole and an oil return hole are respectively provided at the upper and lower positions of the large end. Both the oil inlet hole and the oil return hole are through holes and are close to the inner edge of the annular sealing gasket. The oil inlet hole is connected to the oil return channel on the stationary plate.

[0010] The large end has an oil return groove on its front side that communicates with the oil return hole. The oil return groove extends from the oil return hole into the inner cavity of the front cover and is set obliquely upward.

[0011] The large end has an oil inlet groove on its front side that communicates with the oil inlet port, and the oil inlet groove is arranged vertically.

[0012] The heat exchange fins are provided with concentrically spaced annular heat dissipation fins; the heat dissipation fins are fixedly connected to the large end by bolts, and the annular sealing gasket is clamped between the heat dissipation fins and the large end.

[0013] The axes of the oil inlet and oil return holes are parallel to the axis of the eccentric sleeve.

[0014] The beneficial effects of this utility model are as follows: This utility model adds heat dissipation fins, an oil inlet, and an oil return hole to the front cover. The high-temperature refrigerant oil returning from the high-pressure chamber of the compressor flows back through the oil return channel on the stationary plate, and then enters the area between the back of the front cover and the heat dissipation fins through the oil inlet, forming an annular oil passage between the heat dissipation fins and the back of the front cover. The low-temperature, low-pressure refrigerant and refrigerant oil drawn into the compressor are located on the front and rear sides of the heat dissipation fins, respectively. Therefore, the low-temperature, low-pressure refrigerant flowing through the heat dissipation fins can cool the refrigerant oil. The high-temperature, high-pressure refrigerant oil, after cooling, enters the front of the large end of the front cover through the oil return hole. The heat dissipation fins effectively reduce the temperature of the oil returning from the high-pressure chamber, increase the viscosity of the lubricating oil, and facilitate the formation of an effective oil film on the surface of the sliding bearing, thereby improving the lubrication performance of the sliding bearing, increasing the reliability of the sliding bearing and the compressor, improving the operating efficiency of the compressor, and reducing the noise of the compressor operation.

[0015] As a preferred option, the front of the large end is provided with an oil return groove that communicates with the oil return hole, which guides the return flow of the cooled refrigeration oil and facilitates the return of the lubricating oil to the inner cavity of the front cover.

[0016] As a preferred option, the front of the large end is provided with an oil inlet groove that communicates with the oil inlet, which serves as a transition and guide, facilitating the entry of high-temperature and high-pressure refrigeration oil from the static plate oil return channel into the oil inlet.

[0017] As a preferred option, the spaced-out annular heat sinks have high heat transfer efficiency, which is beneficial for the rapid cooling of high-temperature lubricating oil. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a compressor with a lubricating oil cooling structure according to an embodiment of the present invention;

[0019] Figure 2 yes Figure 1 A magnified view of a portion of the image;

[0020] Figure 3 yes Figure 1 A schematic diagram of the front cover and heat dissipation fins;

[0021] Figure 4 yes Figure 3 The left view;

[0022] Figure 5 yes Figure 1 3D view of the front cover and heat dissipation fins;

[0023] Figure 6 yes Figure 5 A plan view of the middle section without the heat sink fins;

[0024] Figure 7 yes Figure 5 Plan view of the front of the center cover.

[0025] In the diagram: 1-Stationary disc, 1.1-Oil return channel, 2-Moving disc, 3-High pressure chamber, 4-Front cover, 4.1-Large end, 4.2-Small end, 5-Eccentric sleeve, 6-Sliding bearing, 7-Front cover cavity, 8-Heat dissipation fins, 9-Annular sealing gasket, 10-Oil inlet hole, 11-Oil return hole, 12-Oil inlet groove, 13-Oil return groove. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0027] like Figures 1 to 7As shown, an embodiment of the present invention discloses a compressor with a lubricating oil cooling structure, which includes a stationary disc 1 and a moving disc 2 meshing together. The back of the stationary disc 1 is a high-pressure chamber 3. The back of the moving disc 2 is provided with a front cover 4. The front cover 4 includes a large end 4.1 with a planar structure and a small end 4.2 with an inner cavity. An eccentric sleeve 5 is connected to the back of the moving disc 2 and passes through the small end of the front cover 4. A sliding bearing 6 is provided between the eccentric sleeve 5 and the moving disc 2. The sliding bearing 6 is located in the cavity of the small end of the front cover 4. The back of the large end 4.1 of the front cover 4 is provided with annularly arranged heat dissipation fins 8. An annular sealing gasket 9 is provided between the heat dissipation fins 8 and the front cover 4. An oil inlet hole 10 and an oil return hole 11 are respectively provided at the upper and lower positions of the large end 4.1 of the front cover 4. Both the oil inlet hole 10 and the oil return hole 11 are through holes and are close to the inner edge of the annular sealing gasket 9. The oil inlet hole 10 communicates with the oil return channel 1.1 on the stationary disc 1.

[0028] The large end 4.1 has an oil return groove 13 on its front surface that communicates with the oil return hole 11. The oil return groove 13 extends from the oil return hole 11 into the inner cavity of the small end 4.2 and is arranged obliquely upward. The large end also has an oil inlet groove on its front surface that communicates with the oil inlet and is arranged vertically.

[0029] The heat exchange fins 8 are provided with concentrically spaced annular heat dissipation fins; the heat dissipation fins 8 are fixedly connected to the front cover 4 by bolts, and the annular sealing gasket 9 is clamped between the heat dissipation fins 8 and the front cover 4. The axes of the oil inlet hole 10 and the oil return hole 11 are both parallel to the axis of the eccentric sleeve 5.

[0030] The front cover of a compressor with a lubricating oil cooling structure in one embodiment of this utility model has the same structure as the front cover of the compressor with a lubricating oil cooling structure described above, so it will not be described again here.

[0031] This invention adds heat dissipation fins, an oil inlet, and an oil return hole to the front cover. The high-temperature refrigerant oil returning from the compressor's high-pressure chamber flows back through the oil return channel on the stationary plate, then enters the area between the back of the front cover and the heat dissipation fins through the oil inlet. A ring-shaped oil passage is formed between the heat dissipation fins and the back of the front cover. The low-temperature, low-pressure refrigerant and refrigerant oil drawn in by the compressor are located on the front and rear sides of the heat dissipation fins, respectively. Therefore, the low-temperature, low-pressure refrigerant flowing through the heat dissipation fins cools the refrigerant oil. After cooling, the high-temperature, high-pressure refrigerant oil enters the front of the large end of the front cover through the oil return hole, and then returns to the inner cavity of the small end of the front cover. The oil passage direction is as follows: Figure 4 As indicated by the middle arrow, the heat dissipation fins effectively reduce the temperature of the oil returning from the high-pressure chamber, increase the viscosity of the lubricating oil, and facilitate the formation of an effective oil film on the surface of the sliding bearing. This improves the lubrication performance of the sliding bearing, increases the operating efficiency of the compressor, and reduces the noise during compressor operation.

Claims

1. A compressor with a lubricating oil cooling structure, comprising a stationary disc and a moving disc meshing together, the back of the stationary disc being a high-pressure chamber, and the back of the moving disc having a front cover, the front cover comprising a large end with a planar structure and a small end with an inner cavity, an eccentric sleeve passing through the small end of the front cover and sealingly connected to the back of the moving disc, a sliding bearing being provided between the eccentric sleeve and the moving disc, the sliding bearing being located within the cavity of the front cover, characterized in that: The back surface of the large end of the front cover is provided with annularly arranged heat dissipation fins, and an annular sealing gasket is arranged between the heat dissipation fins and the front cover.

2. The compressor with a lubricant cooling structure according to claim 1, characterized by: The front surface of the large end is provided with an oil return groove in communication with the oil return hole, and the oil return groove extends from the oil return hole to the inner cavity of the small end and is arranged obliquely upward.

3. The compressor with a lubricant cooling structure according to claim 1, characterized in that: The front surface of the large end is provided with an oil inlet groove in communication with the oil inlet hole, and the oil inlet groove is arranged vertically.

4. The compressor with a lubricant cooling structure according to claim 1, characterized by: The heat dissipation fins are fixedly connected with the front cover through bolts, and the annular sealing gasket is clamped between the heat dissipation fins and the front cover.

5. The compressor with a lubricant cooling structure according to claim 1, characterized in that: The heat dissipation fins are fixedly connected with the front cover through bolts, and the annular sealing gasket is clamped between the heat dissipation fins and the front cover.

6. A front cover of a compressor with a lubricating oil cooling structure, the front cover comprising a large end in a planar structure and a small end having an inner cavity, characterized in that: The heat dissipation fins are fixedly connected with the front cover through bolts, and the annular sealing gasket is clamped between the heat dissipation fins and the front cover.

7. The front cover of a compressor with a lubricant cooling structure according to claim 6, characterized in that: The heat dissipation fins are fixedly connected with the front cover through bolts, and the annular sealing gasket is clamped between the heat dissipation fins and the front cover.

8. The front cover of a compressor with a lubricant cooling structure according to claim 6, characterized in that: The heat dissipation fins are fixedly connected with the front cover through bolts, and the annular sealing gasket is clamped between the heat dissipation fins and the front cover.

9. The front cover of a compressor with a lubricant cooling structure according to claim 6, characterized in that: The heat dissipation fins are fixedly connected with the front cover through bolts, and the annular sealing gasket is clamped between the heat dissipation fins and the front cover.

10. The front cover of a compressor with a lubricant cooling structure according to claim 6, characterized in that: The heat dissipation fins are fixedly connected with the front cover through bolts, and the annular sealing gasket is clamped between the heat dissipation fins and the front cover. The heat dissipation fins are fixedly connected with the front cover through bolts, and the annular sealing gasket is clamped between the heat dissipation fins and the front cover.

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