Oil circuit structure and scroll compressor

Abstract

The present invention provides an oil circuit structure and a scroll compressor, comprising: a movable scroll, a support structure, a back pressure chamber is provided between the movable scroll and the support structure; a motor assembly, an oil storage area is provided in the chamber where the motor assembly is located; a first oil introduction channel is provided on the support structure, the first oil introduction channel connects the oil storage area and the back pressure chamber, and the first oil introduction channel is used to introduce the oil in the oil storage area into the back pressure chamber. The oil circuit structure and the scroll compressor of the present invention can realize oil film lubrication, reduce friction power consumption, and improve the reliability of the compressor; the oil introduction channel has a simple structure, does not require high and low pressure throttling, and does not have the risk of high and low pressure leakage. The oil circuit channel is relatively separated from the gas circuit, which can reduce the oil discharge rate of the compressor and improve the heat exchange effect of the system; the formation of a circulating oil circuit can better promote the recycling of lubricating oil in the compressor, simplify parts processing and design, and have a simple process and are safe and reliable.

Description

Technical Field

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

[0002] The electric scroll compressor of automobile air conditioner is usually horizontal, that is, the motor, shaft system and pump body in the compressor are all installed horizontally. Compared with the conventional vertical compressor, the disadvantage of horizontal compressor is that there is no stable lubricating oil pool inside the compressor. It is difficult to recycle the refrigeration oil and lubricate the bearings.

[0003] like Figure 1 In the oil circuit structure of the prior art shown in the figure, the moving plate 1', the stationary plate 2', and the bracket 3' are respectively provided with an oil introduction channel structure 4', which connects the back pressure chamber 5' with the exhaust high pressure oil area 6'. As the moving plate 1' rotates one circle, the oil introduction channel structure 4' is connected once, and the high pressure oil is intermittently introduced to the back pressure chamber 5' to lubricate the bearing. In the above scheme, the pressure difference is used to introduce the high pressure oil to the back pressure chamber to lubricate the bearings on the bracket 3' and the moving plate 1'.

[0004] However, this solution requires a certain amount of lubricating oil to be stored in the high-pressure area, which will cause a large oil discharge rate problem for the compressor. On the other hand, impurities generated by the wear of the pump body in the high-pressure oil area will enter the back pressure cavity 5' through the oil inlet channel structure 4', and the impurities may also block the oil inlet channel, affecting the lubrication of the bracket 3', the moving plate 1', etc., and causing abnormal wear. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is that the oil circuit structure causes a large oil discharge rate of the compressor, and impurities enter to cause bearing damage, thereby providing an oil circuit structure and a scroll compressor.

[0006] In order to solve the above problems, the present invention provides an oil circuit structure, comprising:

[0007] A movable scroll and a support structure, wherein a back pressure chamber is provided between the movable scroll and the support structure;

[0008] A motor assembly, wherein an oil storage area is provided in the chamber where the motor assembly is located;

[0009] A first oil introduction channel is provided on the support structure, the first oil introduction channel connects the oil storage area and the back pressure chamber, and the first oil introduction channel is used to introduce the oil in the oil storage area into the back pressure chamber.

[0010] The purpose of the present invention and the solution to its technical problems can be further achieved by adopting the following technical measures.

[0011] Preferably, the oil circuit structure also includes a crankshaft component, which is rotatably connected to the movable scroll plate. A movable disk bearing is provided at the connection between the crankshaft component and the movable scroll plate. The movable disk bearing is installed in a first bearing chamber. The first bearing chamber is communicated with the back pressure chamber. The oil in the back pressure chamber can lubricate the movable disk bearing.

[0012] Preferably, the first oil introduction channel is opened along the radial direction of the support structure.

[0013] Preferably, the first oil introduction channel comprises an oil suction pipe, which is connected to a port of the first oil introduction channel located in the oil storage area, and extends to the bottom oil in the oil storage area.

[0014] Preferably, the oil circuit structure also includes a crankshaft component, which is rotatably connected to the support structure. A support bearing is provided at the connection between the crankshaft component and the support structure. The support bearing is installed in a second bearing chamber. The second bearing chamber is connected to the back pressure chamber, and the oil in the back pressure chamber can lubricate the support bearing.

[0015] Preferably, a second oil inlet passage is provided on the support structure, and the second oil inlet passage communicates with the second bearing chamber and the back pressure chamber.

[0016] Preferably, the second oil introduction channel is opened along the axial direction of the support structure.

[0017] Preferably, the other end of the crankshaft component is connected to the bottom shell component of the compressor, and a third bearing chamber is provided on the bottom shell component, in which a bottom shell bearing is installed. An eccentric hole is provided in the crankshaft component, and the eccentric hole connects the back pressure chamber and the third bearing chamber. The oil in the back pressure chamber can enter the third bearing chamber through the eccentric hole to lubricate the bottom shell bearing.

[0018] Preferably, at least one oil guide sheet is installed in the eccentric hole.

[0019] Preferably, an oil guide plate is provided at one end of the eccentric hole close to the back pressure chamber, and / or an oil guide plate is provided at one end of the eccentric hole close to the third bearing chamber.

[0020] Preferably, an oil pump structure is provided in the third bearing chamber, and the oil pump structure is connected to the eccentric hole. The oil pump structure can suck the oil in the back pressure chamber into the third bearing chamber through the eccentric hole.

[0021] Preferably, the third bearing chamber is connected to the oil storage area through a fourth oil introduction passage, and the fourth oil introduction passage is arranged in the bottom shell.

[0022] Preferably, the oil circuit structure further comprises a sealing device, and the sealing device is used to seal the oil in the movable scroll.

[0023] Preferably, the sealing device is arranged on the contact surface between the fixed scroll plate of the compressor and the machine cover, and the sealing device includes a refrigerant seal and an oil seal.

[0024] A scroll compressor adopts the above oil circuit structure.

[0025] The oil circuit structure and scroll compressor provided by the present invention have at least the following beneficial effects:

[0026] The oil circuit structure and scroll compressor of the present invention, the dynamic and static scrolls and bearing parts can realize oil film lubrication, reduce friction power consumption, and improve the reliability of the compressor; the oil inlet channel has a simple structure, does not require high and low pressure throttling, and does not have the risk of high and low pressure leakage. The oil circuit channel is relatively separated from the gas circuit, which can reduce the oil discharge rate of the compressor and improve the heat exchange effect of the system; the formation of a circulating oil circuit can better promote the recycling of lubricating oil in the compressor, simplify parts processing and design, and have a simple process, safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the oil circuit structure in the prior art;

[0028] Figure 2 A schematic diagram of an oil circuit structure according to an embodiment of the present invention;

[0029] Figure 3 is a schematic diagram of a support structure according to an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the oil suction pipe structure of an embodiment of the present invention;

[0031] Figure 5 Schematic diagram of the oil pump structure according to an embodiment of the present invention.

[0032] The reference numerals are as follows:

[0033] 1', moving plate; 2', stationary plate; 3', bracket; 4', oil inlet channel structure; 5', back pressure chamber; 6', high pressure oil area.

[0034] 1. Orbital scroll; 2. Support structure; 3. Back pressure chamber; 4. Motor assembly; 5. Oil storage area; 6. First oil inlet passage; 7. Crankshaft; 8. Moving disk bearing; 9. First bearing chamber; 10. Oil suction pipe; 11. Support bearing; 12. Second bearing chamber; 13. Second oil inlet passage; 14. Bottom shell; 15. Third bearing chamber; 16. Bottom shell bearing; 17. Eccentric hole; 18. Oil guide plate; 19. Oil pump structure; 20. Refrigerant seal; 21. Oil seal; 22. Stationary scroll; 23. Machine cover; 24. Fourth oil inlet passage. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0036] Combination Figures 1 to 5 As shown, an oil circuit structure provided by an embodiment of the present invention includes: a movable scroll plate 1, a support structure 2, a back pressure chamber 3 is provided between the movable scroll plate 1 and the support structure 2; a motor assembly 4, an oil storage area 5 is provided in the chamber where the motor assembly 4 is located; a first oil inlet channel 6 is provided on the support structure 2, the first oil inlet channel 6 connects the oil storage area 5 and the back pressure chamber 3, and the first oil inlet channel 6 is used to introduce the oil in the oil storage area 5 into the back pressure chamber 3.

[0037] The oil circuit structure of this embodiment changes the technical solution of the back pressure chamber leading oil from the high pressure oil area in the original oil circuit structure, and directly connects the oil storage area 5 at the motor assembly 4 with the back pressure chamber 3. The oil circuit structure avoids the high pressure exhaust channel, which can effectively reduce the oil discharge rate of the compressor, improve the working performance of the compressor, and improve the heat exchange effect of the system. At the same time, it prevents impurities caused by friction loss of the moving and static scrolls from entering the back pressure chamber 3, affecting the normal operation of the bearing parts and the moving scroll 1, and reducing the wear rate of the equipment.

[0038] The interior of the compressor can be set into three different pressure zones through different seals. The cavity containing the motor assembly 4 in the bottom shell 14 is the low-pressure zone Ps, the medium-pressure zone Pm where the back-pressure chamber 3 is located, and the high-pressure zone Pd where the exhaust port of the static scroll plate 22 is located. It is closed with the bottom shell 14 through the machine cover 23 to ensure that the low-pressure zone Ps, the medium-pressure zone Pm and the high-pressure zone Pd are each independent spaces. Since there may be impurities in the high-pressure zone Pd caused by pump body wear, the presence of impurities will have an adverse effect on bearing lubrication. Therefore, it is necessary to separate the high-pressure zone Ps from the medium-pressure zone Pm and the low-pressure zone Ps. The liquid lubricating oil circulates only in the medium-pressure zone Pm and the low-pressure zone Ps, and is isolated from the high-pressure zone Pd, so as to minimize the oil discharge rate of the compressor and prevent impurities from entering.

[0039] In this embodiment, the oil circuit structure also includes a crankshaft component 7, which is rotatably connected to the movable scroll plate 1. A movable disk bearing 8 is provided at the connection between the crankshaft component 7 and the movable scroll plate 1. The movable disk bearing 8 is installed in a first bearing chamber 9. The first bearing chamber 9 is communicated with the back pressure chamber 3. The oil in the back pressure chamber 3 can lubricate the movable disk bearing 8.

[0040] The horizontal compressor targeted by the present invention mainly includes movable and stationary scrolls and bearing parts. In this embodiment, the oil in the oil storage area 5 is introduced into the back pressure chamber 3. The back pressure chamber 3 is in direct contact with the movable scroll 1. The oil in the back pressure chamber 3 flows along the gap between the movable scroll 1 and the support structure 2. As the movable scroll 1 rotates, the lubricating oil can reach the outermost area, that is, the edge of the movable scroll 1. Here, the side surface of the movable scroll 1 is lubricated with the contact surface of the support structure 2 and the stationary scroll 22 and the movable disk bearing 8, so that the lubrication effect of the contact end surface of the movable and stationary disks is excellent.

[0041] In this embodiment, in the horizontal scroll compressor, the oil in the oil storage area 5 is concentrated at the bottom of the radial bottom shell 14 of the compressor, and the first oil inlet channel 6 is opened along the radial direction of the support structure 2 to ensure that the first oil inlet channel 6 can be connected to the oil storage area 5. The distance of the first oil inlet channel 6 can also be shortened. The oil inlet channel structure is simple and easy to process.

[0042] In this embodiment, in order to improve the oil suction effect of the first oil inlet channel 6, the first oil inlet channel 6 includes an oil suction pipe 10, which is connected to the port of the first oil inlet channel 6 in the oil storage area 5. The oil suction pipe 10 extends to the bottom oil in the oil storage area 5. The first oil inlet channel 6 can absorb the bottom oil through the oil suction pipe 10, especially when there is insufficient oil in the oil storage area 5, to meet the lubrication effect of the compressor.

[0043] In this embodiment, the oil circuit structure also includes a crankshaft member 7, which is rotatably connected to the support structure 2. A support bearing 11 is provided at the connection between the crankshaft member 7 and the support structure 2. The support bearing 11 is installed in the second bearing chamber 12. The second bearing chamber 12 is connected to the back pressure chamber 3. The oil in the back pressure chamber 3 can lubricate the support bearing 11. Due to assembly requirements, the second bearing chamber 12 is not connected to the back pressure chamber 3 in the prior art. Therefore, in this embodiment, a second oil inlet channel 13 is provided on the support structure 2, and the second oil inlet channel 13 connects the second bearing chamber 12 and the back pressure chamber 3. The second oil inlet channel 13 is opened along the axial direction of the support structure 2, and the second oil inlet channel 13 can introduce the oil in the back pressure chamber 3 into the second bearing chamber 12.

[0044] The other end of the crankshaft 7 in this embodiment is connected to the bottom shell 14 of the compressor, and the bottom shell 14 is provided with a third bearing chamber 15, and a bottom shell bearing 16 is installed in the third bearing chamber 15. In the prior art, the bottom shell bearing 16 is only lubricated by the oil mist carried in the suction refrigerant, especially when running at high speed, the lubrication of the bottom shell bearing 16 is worse. Therefore, an eccentric hole 17 is provided in the crankshaft 7 of this embodiment, and the eccentric hole 17 connects the back pressure chamber 3 and the third bearing chamber 15. At least one oil guide plate 18 is installed in the eccentric hole 17, and the oil in the back pressure chamber 3 can enter the third bearing chamber 15 through the eccentric hole 17 to lubricate the bottom shell bearing 16. The oil guide plate 18 is preferably in a sheet-shaped spiral shape, and the direction of the oil guide plate 18 is opposite to the rotation direction of the compressor crankshaft 7. The oil guide plate 18 will generate passive suction as the crankshaft 7 rotates, sucking oil from the back pressure chamber 3 and discharging it to the third bearing chamber 15. When the oil reaches the third bearing chamber 15 , a portion of it participates in the lubrication of the bottom shell bearing 16 , and the other portion flows back to the oil storage area 5 .

[0045] Thus, the oil circuit structure of this embodiment can form a complete circulating oil circuit: the oil in the oil storage area 5 enters the back pressure chamber 3 through the first oil introduction channel 6 to complete the lubrication of the movable and stationary scrolls and the movable disk bearings, and is divided into two paths, the first path reaches the second bearing chamber 12 through the second oil introduction channel 13 to complete the lubrication of the bracket bearing 11; the second path reaches the third bearing chamber 15 through the eccentric hole 17 to complete the lubrication of the bottom shell bearing 16, and finally flows back to the oil storage area 5. The above circulation can not only solve the problem of poor lubrication of the bottom shell bearing 16, but also solve the problem of impurities generated by the friction of the movable and stationary disks affecting the reliability of the compressor.

[0046] In this embodiment, the installation position of the oil guide plate 18 has a certain influence on its oil guiding performance. The oil guide plate 18 is arranged at the end of the eccentric hole 17 close to the back pressure chamber 3, and / or the oil guide plate 18 is arranged at the end of the eccentric hole 17 close to the third bearing chamber 15. The closer the oil guide plate 18 is to the upstream of the oil flow direction, the better the oil guiding effect.

[0047] In this embodiment, in order to improve the circulation efficiency of the oil circulation loop, an oil pump structure 19 is provided in the third bearing chamber 15, and the oil pump structure 19 is connected to the eccentric hole 17. The oil pump structure 19 can suck the oil in the back pressure chamber 3 to the third bearing chamber 15 through the eccentric hole 17. Using the oil pump structure 19 instead of the oil guide plate 18 can improve the circulation efficiency of the oil and improve the lubrication effect.

[0048] In this embodiment, the third bearing chamber 15 is communicated with the oil storage area 5 through the fourth oil introduction passage 24 , and the fourth oil introduction passage 24 is disposed in the bottom housing 14 .

[0049] In this embodiment, the oil circuit structure also includes a sealing device, which is used to seal the oil in the movable scroll 1. The sealing device is arranged on the contact surface between the fixed scroll 22 of the compressor and the cover 23, which is convenient for installation. The sealing device includes a refrigerant seal 20 and an oil seal 21. The refrigerant seal 20 is used to prevent the high-temperature and high-pressure refrigerant in the high-pressure area Pd from running around, and the oil seal 21 is used to prevent the oil in the compressor from entering the high-pressure area Pd, thereby increasing the oil discharge rate of the compressor.

[0050] The oil circuit structure of this embodiment can realize oil film lubrication for both the dynamic and static scrolls and bearing parts, reduce friction power consumption, and improve the reliability of the compressor; the oil inlet channel has a simple structure, does not require high and low pressure throttling, and does not have the risk of high and low pressure leakage. The oil circuit is relatively separated from the gas circuit, which can reduce the oil discharge rate of the compressor and improve the heat exchange effect of the system; forming a circulating oil circuit can better promote the recycling of lubricating oil in the compressor, simplify parts processing and design, and have a simple process, safety and reliability.

[0051] A scroll compressor adopts the above oil circuit structure.

[0052] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0053] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention, and these improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. An oil circuit structure, characterized in that: include: A movable scroll (1) and a support structure (2), wherein a back pressure chamber (3) is provided between the movable scroll (1) and the support structure (2); A motor component (4), wherein an oil storage area (5) is provided in the chamber where the motor component (4) is located; The support structure (2) is provided with a first oil introduction channel (6), the first oil introduction channel (6) communicating with the oil storage area (5) and the back pressure chamber (3), and the first oil introduction channel (6) is used to introduce the oil in the oil storage area (5) into the back pressure chamber (3); the oil circuit structure also includes a crankshaft component (7), the crankshaft component (7) is rotatably connected to the support structure (2), a support bearing (11) is provided at the connection between the crankshaft component (7) and the support structure (2), the support bearing (11) is installed in a second bearing chamber (12), the second bearing chamber (12) is communicated with the back pressure chamber (3), and the oil in the back pressure chamber (3) can lubricate the support bearing (11).

2. The oil circuit structure according to claim 1, characterized in that: The oil circuit structure further comprises a crankshaft member (7), the crankshaft member (7) being rotatably connected to the movable scroll (1), a movable scroll bearing (8) being provided at the connection between the crankshaft member (7) and the movable scroll (1), the movable scroll bearing (8) being mounted in a first bearing chamber (9), the first bearing chamber (9) being in communication with the back pressure chamber (3), and the oil in the back pressure chamber (3) being capable of lubricating the movable scroll bearing (8).

3. The oil circuit structure according to claim 2, characterized in that: The first oil introduction channel (6) is opened along the radial direction of the support structure (2).

4. The oil circuit structure according to claim 2, characterized in that: The first oil introduction channel (6) comprises an oil suction pipe (10), the oil suction pipe (10) being connected to a port of the first oil introduction channel (6) located in the oil storage area (5), and the oil suction pipe (10) extending to the bottom layer of oil in the oil storage area (5).

5. The oil circuit structure according to claim 1, characterized in that: The support structure (2) is provided with a second oil introduction passage (13), and the second oil introduction passage (13) is connected with the second bearing chamber (12) and the back pressure chamber (3).

6. The oil circuit structure according to claim 5, characterized in that: The second oil introduction channel (13) is opened along the axial direction of the support structure (2).

7. The oil circuit structure according to any one of claims 1 to 6, characterized in that: The other end of the crankshaft member (7) is connected to a bottom shell member (14) of the compressor. A third bearing chamber (15) is provided on the bottom shell member (14). A bottom shell bearing (16) is installed in the third bearing chamber (15). An eccentric hole (17) is provided in the crankshaft member (7). The eccentric hole (17) communicates the back pressure chamber (3) with the third bearing chamber (15). The oil in the back pressure chamber (3) can enter the third bearing chamber (15) through the eccentric hole (17) to lubricate the bottom shell bearing (16).

8. The oil circuit structure according to claim 7, characterized in that: At least one oil guide sheet (18) is installed in the eccentric hole (17).

9. The oil circuit structure according to claim 8, characterized in that: The oil guide plate (18) is arranged at one end of the eccentric hole (17) close to the back pressure chamber (3), and / or the oil guide plate (18) is arranged at one end of the eccentric hole (17) close to the third bearing chamber (15).

10. The oil circuit structure according to claim 7, characterized in that: An oil pump structure (19) is provided in the third bearing chamber (15), and the oil pump structure (19) is in communication with the eccentric hole (17). The oil pump structure (19) can suck oil in the back pressure chamber (3) into the third bearing chamber (15) through the eccentric hole (17).

11. The oil circuit structure according to any one of claims 8 to 10, characterized in that: The third bearing chamber (15) is connected to the oil storage area (5) via a fourth oil introduction passage (24), and the fourth oil introduction passage (24) is arranged in the bottom shell (14).

12. The oil circuit structure according to any one of claims 1-6, 8-10, characterized in that: The oil circuit structure further comprises a sealing device, wherein the sealing device is used to seal the oil in the movable scroll (1).

13. The oil circuit structure according to claim 12, characterized in that: The sealing device is arranged on a contact surface between a fixed scroll plate (22) of the compressor and a machine cover (23), and the sealing device comprises a refrigerant sealing component (20) and an oil sealing component (21).

14. A scroll compressor, characterized in that: Adopt the oil circuit structure described in any one of claims 1-13.

Images