Oil return structure and scroll compressor

Abstract

The oil return structure comprises a shell, a bearing seat and a wear-resisting piece, a containing cavity is formed in the shell, an end cover is arranged on one side of the shell, and an oil storage cavity is formed in the end cover; the bearing seat is arranged in the containing cavity, a scroll plate is arranged between the bearing seat and the end cover, the bearing seat is used for supporting the scroll plate, and the scroll plate comprises a movable plate and a static plate; a compression cavity is formed between the movable disc and the static disc; a backpressure cavity is formed between the bearing seat and the movable disc; a third flow channel, a fifth flow channel communicated with the compression cavity and a first flow channel communicated with the oil storage cavity are formed in the static disc. A wear-resistant sheet is arranged between the scroll plate and the bearing seat, and a runner II communicated with the runner I and the runner III is arranged on the wear-resistant sheet; a fourth runner communicating with the third runner and the fifth runner is formed between the end cover and the static disc, a sixth runner is arranged on the movable disc, the compression cavity is communicated with the back pressure cavity through the sixth runner, all moving parts of the scroll compressor can be lubricated, abrasion among the parts is reduced, the service life of the scroll compressor can be prolonged, and the compression efficiency of the scroll compressor can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of compressors, and in particular to an oil return structure and a scroll compressor. Background Art

[0002] When the scroll compressor is running, friction will occur between the internal moving plate and the stationary plate or between the moving plate and the wear-resistant plate, as well as between the drive shaft and the bearing and other components, thereby increasing the wear between the moving parts and resulting in a short service life. Therefore, when the scroll compressor is running, each component needs to be lubricated.

[0003] Existing scroll compressors can only lubricate bearings or drive shafts, and it is difficult to lubricate all rotating parts at the same time. Among them, wear of the moving plate or the stationary plate will cause the gap between the two to increase, and they cannot effectively fit together, which will affect the compression efficiency and service life of the scroll compressor. Utility Model Content

[0004] The present application provides an oil return structure to solve the problem that the scroll compressor is difficult to lubricate the moving parts, and adopts the following technical solutions:

[0005] The oil return structure comprises a shell, a receiving cavity is arranged in the shell, an end cover is arranged on one side of the shell, and an oil storage cavity is arranged in the end cover;

[0006] A bearing seat, the bearing seat is arranged in the accommodating cavity, and a scroll plate is arranged between the bearing seat and the end cover, the bearing seat is used to support the scroll plate, the scroll plate includes a moving plate and a stationary plate; a compression cavity is formed between the moving plate and the stationary plate; a back pressure cavity is formed between the bearing seat and the moving plate;

[0007] The static plate is provided with a flow channel 3, a flow channel 5 connected to the compression chamber, and a flow channel 1 connected to the oil storage chamber;

[0008] A wear-resistant sheet, wherein a wear-resistant sheet is provided between the scroll plate and the bearing seat, and a flow channel 2 is provided on the wear-resistant sheet, which is connected with the flow channel 1 and the flow channel 3;

[0009] A flow channel four connecting the flow channel three and the flow channel five is formed between the end cover and the static plate. A flow channel six is ​​provided on the moving plate, and the flow channel six connects the compression chamber with the back pressure chamber.

[0010] Preferably, the second flow channel is arranged on the surface of the wear-resistant plate on the side close to the moving disk.

[0011] Preferably, it also includes an eccentric sleeve, which is arranged in the back pressure chamber, and one end of the eccentric sleeve is provided with a rolling component connected to the moving plate.

[0012] Further preferably, it further comprises a driving assembly, wherein a driving shaft is provided between the driving assembly and the other end of the eccentric sleeve.

[0013] Further preferably, a second rolling component is provided in the back pressure chamber, and the second rolling component is sleeved on the driving shaft.

[0014] Preferably, an exhaust cavity is provided on the end cover, an exhaust hole connecting the exhaust cavity and the compression cavity is provided in the middle of the stator, and the oil storage cavity is connected to the exhaust cavity.

[0015] Preferably, it further comprises a filter component, and the filter component is arranged in the oil storage cavity.

[0016] The present application also provides a scroll compressor, comprising the oil return structure.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] A plurality of flow channels interconnected with each other are provided in the scroll compressor. The lubricating oil enters flow channel two through flow channel one to form an oil film between the wear-resistant plate and the moving plate to reduce the wear of the moving plate and the wear-resistant plate. The lubricating oil enters flow channel five through flow channels three and four to lubricate the moving plate and the stationary plate. Part of the lubricating oil combines with the refrigerant and returns to flow channel one through the exhaust hole in the middle of the stationary plate. The remaining lubricating oil flows into the back pressure chamber through flow channel six on the moving plate to lubricate the rolling parts and drive shaft arranged therein, thereby lubricating the various parts in the scroll compressor and preventing the moving parts from wearing due to lack of lubricating oil, thereby reducing wear and improving the service life and compression efficiency of the scroll compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a half-section view of the present application;

[0020] Figure 2 It is a schematic diagram of the flow channel structure of the present application;

[0021] Figure 3 It is a schematic diagram of the flow channel 2 structure of the present application;

[0022] Figure 4 It is a schematic diagram of the flow channel three structure of the present application;

[0023] Figure 5 This application Figure 1 Left view (end caps hidden);

[0024] Figure 6 It is a schematic diagram of the flow channel five structure of the present application;

[0025] Figure 7 It is a schematic diagram of the flow channel six structure of the present application;

[0026] Figure 8 It is a flow diagram of the oil return structure of this application.

[0027] In the figure:

[0028] 1. Shell, 2. End cover, 20. Exhaust chamber, 21. Oil storage chamber, 3. Bearing seat, 4. Scroll plate, 41. Moving plate, 42. Static plate, 420. Exhaust hole, 5. Back pressure chamber, 6. Compression chamber, 7. Wear-resistant plate, 8. Eccentric sleeve, 9. Drive assembly, 1-1. Flow channel one, 1-2. Flow channel two, 1-3. Flow channel three, 1-5. Flow channel five, 1-6. Flow channel six, 100. Filter component. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described in the present application are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0030] See also Figures 1 to 8 To further illustrate the present application, the scroll compressor oil return mechanism comprises a shell 1, wherein the shell 1 is provided with a accommodating cavity, an end cover 2 is provided at one side of the shell 1, and an oil storage cavity 21 for storing lubricating oil is provided in the end cover 2, wherein the oil storage cavity 21 comprises an oil inlet and an oil outlet.

[0031] The bearing seat 3 is arranged in the accommodating cavity, and a vortex plate 4 is provided between the bearing seat 3 and the end cover 2. The bearing seat 3 is used to support the vortex plate 4, and the vortex plate 4 includes a moving plate 41 and a stationary plate 42, and the moving plate 41 and the stationary plate 42 are used in combination; a compression chamber 6 is formed between the moving plate 41 and the stationary plate 42 for compressing the medium; a back pressure chamber 5 is formed between the bearing seat 3 and the moving plate 41; a flow channel three 1-3 and a flow channel five 1-5 connected to the compression chamber 6, as well as a flow channel one 1-1 connected to the oil storage chamber 21 are provided on the stationary plate 42.

[0032] A wear-resistant plate 7 is provided between the vortex plate 4 and the bearing seat 3, and a flow channel 2 1-2 connecting the flow channel 1-1 and the flow channel 3 1-3 is provided on the wear-resistant plate 7, wherein the flow channel 2 1-2 is provided on the surface of the wear-resistant plate 7 on the side close to the movable plate 41, and the flow channel 2 1-2 can provide lubricating oil between the wear-resistant plate 7 and the movable plate 41, so that an oil film is formed between the movable plate 41 and the wear-resistant plate 7, so as to reduce the wear of the movable plate 41 and the wear-resistant plate 7.

[0033] The static plate 42 is provided with the flow channel three 1-3 and the flow channel five 1-5, and the flow channel four connecting the flow channel three 1-3 and the flow channel five 1-5 is formed between the end cover 2 and the static plate 42, and the dynamic plate 41 is provided with a flow channel six 1-6, and the flow channel six 1-6 connects the compression chamber 6 with the back pressure chamber 5. Specifically, the oil outlet of the flow channel three 1-3 and the oil inlet of the flow channel four are the same, the oil outlet of the flow channel four and the oil inlet of the flow channel five 1-5 are the same, and the flow channel three 1-3 and the flow channel five 1-5 are connected through the flow channel four; wherein, the flow channel four can be an oil groove opened on the end cover 2, and the oil groove connects the flow channel three 1-3 and the flow channel five 1-5 to form the flow channel four.

[0034] In summary, combined Figure 8 The lubricating oil in the oil storage chamber 21 enters the flow channel 2 1-2 through the flow channel 1-1, and part of the lubricating oil lubricates the wear-resistant plate 7 and the moving plate 41, and the remaining lubricating oil flows to the flow channel 3 1-3, the flow channel 4 and the flow channel 5 1-5 in sequence through the flow channel 2 1-2, and enters the compression chamber 6 to lubricate the moving plate 41 and the static plate 42. The lubricating oil entering the compression chamber 6 can enter the back pressure chamber 5 through the flow channel 6 1-6, thereby lubricating the components in the back pressure chamber 5, and each flow channel includes an oil inlet and an oil outlet, the oil inlet of the flow channel is connected to the oil outlet of the previous flow channel, and the oil outlet of the flow channel is connected to the oil inlet of the next flow channel, so as to lubricate the components passing through, so as to reduce the wear between the components, and improve the service life and compression efficiency.

[0035] Combination Figure 1 and Figure 4 The end cover 2 is also provided with an exhaust chamber 20, and the middle part of the stator 42 is provided with an exhaust hole 420 connecting the exhaust chamber 20 and the compression chamber 6; the oil storage chamber 21 is connected with the exhaust chamber 20, specifically, the oil inlet of the oil storage chamber 21 is connected with the exhaust chamber 20, and the oil outlet of the oil storage chamber 21 is connected with the oil inlet of the flow channel 1-1; after the compressed medium (refrigerant and lubricating oil) enters the oil inlet of the oil storage chamber 21, the lubricating oil mixed in the medium will be deposited at the oil outlet of the oil storage chamber 21 by its own gravity, wherein the medium sucked into the compression chamber 6 can be air or refrigerant, etc.

[0036] It also includes an eccentric sleeve 8, which is arranged in the back pressure chamber 5. One end of the eccentric sleeve 8 is provided with a rolling component connected to the moving plate 41; a driving component 9 is also provided in the accommodating chamber, and the driving component 9 is arranged on one side of the bearing seat 3, opposite to the back pressure chamber 5, and a driving shaft is provided between the driving component 9 and the eccentric sleeve 8; the driving component 9 drives the eccentric sleeve 8 through the driving shaft to drive the moving plate 41 to rotate in the static plate 42, thereby compressing the medium in the compression chamber 6. In this embodiment, the driving component 9 is a driving motor.

[0037] When the moving plate 41 is running, the lubricating oil entering the compression chamber 6 through the flow channel 5 1-5 can lubricate the moving plate 41 and the static plate 42, reduce the wear of the moving plate 41 and the static plate 42, ensure that the two can fit effectively, and improve the compression efficiency.

[0038] A rolling component 2 is provided in the back pressure chamber 5, and the rolling component 2 is sleeved on the drive shaft to support the rotation of the drive shaft. In this embodiment, the rolling component 1 and the rolling component 2 are both bearings; the lubricating oil enters the back pressure chamber 5 through the flow channel 6 1-6, so as to lubricate the rolling component 1, the rolling component 2, the eccentric sleeve 8 and the drive shaft in the back pressure chamber 5 to reduce wear.

[0039] When the moving plate 41 rotates, the refrigerant entering the compression chamber 6 will mix with the lubricating oil and gradually accumulate toward the exhaust hole 420 in the middle of the stationary plate 42, wherein the diameter of the flow channel 6 1-6 is smaller than the diameter of the exhaust hole 420, and the flow channel 6 1-6 is located at the periphery of the exhaust hole 420; during the compression process, at least part of the medium mixed with the lubricating oil will first enter the back pressure chamber 5 through the flow channel 6 1-6, and when most of the remaining medium is compressed to the exhaust hole 420, The oil enters the exhaust chamber 20 through the exhaust hole 420, and then enters the oil inlet of the oil storage chamber 21; at this time, the lubricating oil in the medium can be gathered to the oil outlet by its own gravity, and then flows through the flow channel 1 1-1, the flow channel 2 1-2, the flow channel 3 1-3, the flow channel 4, the flow channel 5 1-5 and the flow channel 6 1-6 in sequence through the oil outlet, forming a closed-loop oil return structure, and the lubricating oil can circulate in the oil return mechanism to lubricate the components that need lubrication.

[0040] A filter component 100 is also provided in the oil storage chamber 21. The filter component 100 can filter out impurities in the lubricating oil to prevent the impurities from entering the components through the flow channel and aggravating the wear of the components. Specifically, the filter component 100 is arranged at the oil outlet.

[0041] In some embodiments, an oil-gas separator may be provided in the oil storage chamber 21 , and the oil-gas separator may separate the lubricating oil mixed with the medium and deposit it at the oil outlet of the oil storage chamber 21 , thereby preventing the lubricating oil from being discharged from the end cover 2 along with the medium.

[0042] The present application also provides a scroll compressor, including the above-mentioned oil return structure. The lubricating oil can be transported to various moving parts through the oil return structure, thereby improving the overall stability of the scroll compressor during operation and increasing its service life.

Claims

1. Oil return structure, characterized by: It comprises a shell, a containing cavity is arranged in the shell, an end cover is arranged on one side of the shell, and an oil storage cavity is arranged in the end cover; A bearing seat, the bearing seat is arranged in the accommodating cavity, and a scroll plate is arranged between the bearing seat and the end cover, the bearing seat is used to support the scroll plate, the scroll plate includes a moving plate and a stationary plate; a compression cavity is formed between the moving plate and the stationary plate; a back pressure cavity is formed between the bearing seat and the moving plate; The static plate is provided with a flow channel 3, a flow channel 5 connected to the compression chamber, and a flow channel 1 connected to the oil storage chamber; A wear-resistant sheet, wherein a wear-resistant sheet is provided between the scroll plate and the bearing seat, and a flow channel 2 is provided on the wear-resistant sheet, which is connected with the flow channel 1 and the flow channel 3; A flow channel four connecting the flow channel three and the flow channel five is formed between the end cover and the static plate. A flow channel six is ​​provided on the moving plate, and the flow channel six connects the compression chamber with the back pressure chamber.

2. The oil return structure according to claim 1, characterized in that: The second flow channel is arranged on the surface of the wear-resistant plate on the side close to the moving plate.

3. The oil return structure according to claim 1, characterized in that: It also includes an eccentric sleeve, which is arranged in the back pressure chamber. One end of the eccentric sleeve is provided with a rolling component connected to the moving plate.

4. The oil return structure according to claim 3 is characterized in that: It also includes a driving component, which is arranged in the accommodating cavity on a side opposite to the back pressure cavity, and a driving shaft is provided between the driving component and the eccentric sleeve.

5. The oil return structure according to claim 4, characterized in that: A second rolling component is also provided in the back pressure chamber, and the second rolling component is sleeved on the driving shaft.

6. The oil return structure according to claim 1, characterized in that: An exhaust cavity is provided on the end cover, an exhaust hole communicating with the exhaust cavity and the compression cavity is provided in the middle of the stator, and the oil storage cavity is communicated with the exhaust cavity.

7. The oil return structure according to claim 1, characterized in that: It also includes a filter component, which is arranged in the oil storage cavity.

8. A scroll compressor, characterized in that: It comprises the oil return structure as described in any one of claims 1 to 7.

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