Scroll compressor

Abstract

The utility model provides a scroll compressor which comprises a static scroll plate, and the static scroll plate is provided with an exhaust cavity, a first hole and a second groove communicated with the exhaust cavity. The middle machine body is positioned below the static scroll plate and is provided with a second hole communicated with the first hole; the main bearing is positioned below the middle machine body; the hole pipe filter is mounted in the first hole, and a through hole communicated with the second hole is formed in the bottom of the hole pipe filter. According to the scroll compressor, the hole pipe filter is directly installed on the static scroll plate, the oil way design is optimized, lubricating oil directly lubricates the main bearing after being filtered, the problems that in the prior art, the filtering effect is poor, the oil way is complex, and lubrication of the main bearing is insufficient are effectively solved, and the performance and reliability of the scroll compressor are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a scroll compressor. BACKGROUND

[0002] As a kind of displacement compressor, scroll compressor is widely used in refrigeration, air conditioning, heat pump and other fields. Its core components are meshing dynamic and static scroll plates, which form multiple closed chambers through relative movement to realize gas suction, compression and discharge. With the rapid development of new energy vehicles, higher requirements are put forward for the performance of scroll compressor for vehicle, including higher displacement, higher speed, lower noise and longer service life.

[0003] During the operation of scroll compressor, lubricating oil plays a crucial role. It not only lubricates the relative movement between dynamic and static scroll plates, reducing friction and wear, but also lubricates key components such as main bearing and auxiliary bearing, ensuring the normal operation of the compressor. In addition, lubricating oil also has the functions of sealing, cooling and reducing noise. Therefore, the design of lubricating system of scroll compressor directly affects the performance and reliability of the compressor.

[0004] In the prior art, a scroll compressor is disclosed in Chinese Utility Model Patent No. CN221322707U. The compressor includes exhaust cylinder cover, static scroll plate, dynamic scroll plate, intermediate body, crankshaft, shell and auxiliary bearing and other components. The technical solution focuses on setting first drainage channel, first drainage hole, second drainage channel and first drainage groove to guide the lubricating oil in the exhaust cavity back to the back pressure cavity, and then use the lubricating oil in the back pressure cavity to supply oil to the sliding bearing and auxiliary bearing arranged at the dynamic scroll plate, thereby improving the operation stability of the compressor.

[0005] The patent also mentions that, in order to prevent gas impurities in the exhaust from entering the sliding bearing and causing friction between the eccentric wheel and the sliding bearing, a hole tube filter is arranged in the first oil return hole. However, the prior art still has the following shortcomings. The hole tube filter is arranged in the first oil return hole. The first oil return hole is usually located on the static scroll plate or thrust sheet, and the oil return hole is usually arranged axially. Due to structural limitations, the space in the first oil return hole is limited, which limits the size and filtering area of the hole tube filter, making it difficult to achieve high filtering efficiency. For high-speed and high-pressure scroll compressors, impurities in the lubricating oil are more likely to cause wear and tear to key components such as bearings, so stronger filtering capacity is required.

[0006] Secondly, the mixture of lubricating oil and refrigerant is throttled and depressurized at the hole tube filter and the first drainage groove. However, using the hole tube filter as one of the throttling elements can easily cause the filter to be blocked, affecting the normal flow of lubricating oil. In addition, the first drainage groove is located on the first bearing seat and is mainly used to supply oil to the auxiliary bearing, and its throttling effect has limited influence on the entire lubricating system.

[0007] In summary, the lubrication system of the scroll compressor in the prior art, especially in the structure, installation position of the hole pipe filter and the oil path design, there is room for improvement to improve the filtering effect of the lubricating oil, simplify the oil path structure, optimize the throttling position, so as to further improve the performance and reliability of the scroll compressor, meet the increasingly stringent application requirements. Practical new type content

[0008] The utility model discloses a scroll compressor, to solve the problem of the prior art that the filtering effect of lubricating oil is limited, the oil path structure is complex, and the main bearing is insufficiently lubricated.

[0009] The utility model provides a scroll compressor, including static scroll disc, be equipped with exhaust cavity, first hole and with exhaust cavity intercommunication's second recess on static scroll disc, middle machine body, middle machine body is located static scroll disc below, and is equipped with with first hole intercommunication's second hole, main bearing, main bearing is located middle machine body below, hole pipe filter, hole pipe filter installs in first hole, and hole pipe filter bottom is equipped with with second hole intercommunication's through -hole.

[0010] Through above -mentioned structure, lubricating oil can from exhaust cavity via second recess, enter into first hole, and hole pipe filter carries out the filtration to lubricating oil, and the lubricating oil after filtration lubricates middle machine body and lower main bearing through through -hole and second hole. The above structure realizes effective filtration to lubricating oil, and hole pipe filter is directly installed in first hole of static scroll disc, compared with the filter setting in the oil return hole in the prior art, has greater installation space, can use the filter with larger filter area, to improve the filtering effect.

[0011] Preferably, the middle machine body is further provided with an inclined hole communicated with the second hole and extending downwardly and obliquely, and the inclined hole is connected with the main bearing. Through the oblique design of the inclined hole, the lubricating oil can be more directly guided to the main bearing, realizing direct lubrication of the main bearing, reducing the flow path of the lubricating oil, improving the lubrication efficiency, and ensuring that the main bearing is fully lubricated.

[0012] Preferably, the utility model further includes a sealing gasket, which is sealingly assembled with the static scroll disc; a third recess is provided on the sealing gasket, the third recess is adjacent to the first hole on the static scroll disc, and the third recess is communicated with the hole pipe filter. Through the sealing assembly of the sealing gasket, the leakage of the lubricating oil and the refrigerant can be effectively prevented; through the third recess adjacent to the first hole and communicated with the hole pipe filter, a part of the oil path is formed, which assists the lubricating oil to flow from the low-pressure side to the hole pipe filter, further improving the oil path structure. Since the sealing gasket is sealingly assembled with the static scroll disc, the design of the third recess will not affect the sealing effect; at the same time, the third recess is adjacent to the first hole, shortening the oil path distance and improving the flow efficiency of the lubricating oil.

[0013] Preferably, the static scroll disc is further provided with a low-pressure cavity, the second groove is communicated with the low-pressure cavity through a bend, and the low-pressure cavity is communicated with the third groove; and a plurality of protrusions are further arranged in the second groove. The communication of the second groove, the bend and the low-pressure cavity forms a complete oil path, so that the lubricating oil flows from the exhaust cavity to the low-pressure cavity, then to the third groove, and finally to the hole-pipe filter. The plurality of protrusions arranged in the second groove can increase the contact area between the liquid oil and the wall surface, which is beneficial to the collection of the liquid oil and the separation of the oil and gas. The communication of the low-pressure cavity and the third groove and the bend between the second groove and the low-pressure cavity make the flow of the lubricating oil more smooth, reduce the flow resistance and improve the lubricating efficiency.

[0014] Preferably, the static scroll disc is further provided with a first groove, and the first groove is communicated with the exhaust cavity. The communication of the first groove and the exhaust cavity forms the initial part of the oil path, guides the oil-gas mixture into the exhaust cavity, and further perfects the oil path structure.

[0015] Preferably, the first hole is a through hole located on the static scroll disc and adjacent to the third groove; and the hole-pipe filter is a cylindrical component located in the first hole and provided with a filter screen at the top. The hole-pipe filter is provided with the filter screen at the top, which can prevent larger impurities from entering the oil path. The first hole is a through hole, which ensures the smoothness of the oil path. The structure that the hole-pipe filter is installed in the first hole makes it fixed, which ensures the stability of the filtering effect. The structure that the first hole is adjacent to the third groove promotes the communication of the oil path.

[0016] Preferably, the second hole is a through hole located on the middle machine body and aligned with the through hole; and the inclined hole is located on the middle machine body, connected with the second hole and inclined downward. The second hole is aligned with the through hole, and the inclined hole is connected with the second hole and inclined, forming a continuous oil path channel, which guides the filtered lubricating oil to the main bearing. This design ensures the flow direction of the lubricating oil and realizes the precise lubrication of the main bearing.

[0017] Preferably, the main bearing is an annular component located below the middle machine body and supporting the rotating component. The annular structure of the main bearing can support the rotating component, and its position below the middle machine body can directly obtain sufficient lubrication of the lubricating oil, reducing wear.

[0018] In summary, the hole-pipe filter is directly installed on the static scroll disc, and the oil path is optimized, so that the filtered lubricating oil directly lubricates the main bearing, effectively solving the problems of poor filtering effect, complex oil path and insufficient lubrication of the main bearing in the prior art, and improving the performance and reliability of the scroll compressor. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 FIG. 1 is a structural schematic view of a cross section of a scroll compressor according to an embodiment of the present application.

[0020] Figure 2It is a structure schematic view of the static scroll plate in a top view of one embodiment of the utility model.

[0021] Figure 3 It is a structure schematic view of the sealing gasket of one embodiment of the utility model. PREFERRED EMBODIMENT

[0022] The utility model will be explained further in detail below in combination with the drawings and specific embodiments.

[0023] Figure 1 It is a structure schematic view of the scroll compressor of one embodiment of the utility model. Figure 2 It is a structure schematic view of the static scroll plate in a top view of one embodiment of the utility model. Figure 3 It is a structure schematic view of the sealing gasket of one embodiment of the utility model.

[0024] As Figures 1-3 The utility model provides a scroll compressor, including static scroll plate 1, static scroll plate 1 is equipped with exhaust cavity 4, first hole 8 and with exhaust cavity 4 the second recess 5 of intercommunication, middle machine body 11, middle machine body 11 is located static scroll plate 1 below, and is equipped with with first hole 8 intercommunication second hole 12, main bearing 14, main bearing 14 is located middle machine body 11 below, hole pipe filter 9, hole pipe filter 9 is installed in first hole 8, and hole pipe filter 9 bottom is equipped with with second hole 12 intercommunication through -hole 10.

[0025] Through above -mentioned structure, lubricating oil can from exhaust cavity 4 via second recess 5, enter into first hole 8, hole pipe filter 9 carries out the filtration to lubricating oil, and the lubricating oil after filtration lubricates middle machine body 11 and lower main bearing 14 through through -hole 10 and second hole 12.The above-mentioned structure realizes effective filtration to lubricating oil, and hole pipe filter 9 is directly installed in first hole 8 of static scroll plate 1, compared with the filter of prior art setting in oil return hole, has greater installation space, can use the filter of larger filtration area, thereby improves filtration effect.

[0026] Further, middle machine body 11 is also equipped with with second hole 12 intercommunication and obliquely downwardly extending inclined hole 13, and inclined hole 13 is connected with main bearing 14.Through the oblique design of inclined hole 13, can more directly guide lubricating oil to main bearing 14, realizes the direct lubrication of main bearing 14, reduces the flow path of lubricating oil, improves lubrication efficiency, guarantees that main bearing 14 is lubricated adequately.

[0027] Further, the sealing gasket 2 is sealingly assembled with the static scroll plate 1; the third groove 7 is provided on the sealing gasket 2 and is adjacent to the first hole 8 on the static scroll plate 1, and the third groove 7 is communicated with the hole pipe filter 9. Through the sealing assembly of the sealing gasket 2, the leakage of lubricating oil and refrigerant can be effectively prevented; through the third groove 7 adjacent to the first hole 8 and communicated with the hole pipe filter 9, a part of the oil path is formed, and the lubricating oil is assisted to flow from the low-pressure side to the hole pipe filter 9, and the oil path structure is further improved. Due to the sealing assembly of the sealing gasket 2 and the static scroll plate 1, the design of the third groove 7 will not affect the sealing effect; at the same time, the third groove 7 is adjacent to the first hole 8, the oil path distance is shortened, and the flow efficiency of the lubricating oil is improved.

[0028] Further, the static scroll plate 1 is further provided with a low-pressure cavity 6, the second groove 5 is communicated with the low-pressure cavity 6 through a bend 15, and the low-pressure cavity 6 is communicated with the third groove 7; a plurality of protrusions 16 are further provided in the second groove 5. Through the communication of the second groove 5, the bend 15 and the low-pressure cavity 6, a complete oil path is formed, so that the lubricating oil flows from the exhaust cavity 4 to the low-pressure cavity 6, then to the third groove 7, and finally to the hole pipe filter 9. The plurality of protrusions 16 in the second groove 5 can increase the contact area of the liquid oil and the wall surface, which is beneficial to the collection of liquid oil and also beneficial to oil-gas separation. Due to the communication of the low-pressure cavity 6 and the third groove 7, and the design of the bend 15 between the second groove 5 and the low-pressure cavity 6, the flow of the lubricating oil is smoother, the flow resistance is reduced, and the lubrication efficiency is improved. The existence of the plurality of protrusions 16 increases the contact area of the liquid oil and the inner wall of the groove 5, and improves the oil-gas separation effect. The protrusions 16 can change the flow state of the liquid oil in the groove 5, produce a certain disturbance, promote the collision and combination of oil droplets, and accelerate the oil-gas separation.

[0029] Further, the static scroll plate 1 is further provided with a first groove 3, and the first groove 3 is communicated with the exhaust cavity 4. Through the communication of the first groove 3 and the exhaust cavity 4, the initial part of the oil path is formed, the oil-gas mixture is guided into the exhaust cavity 4, and the oil path structure is further improved.

[0030] Further, the first hole 8 is a through hole located on the static scroll plate 1 and adjacent to the third groove 7; the hole pipe filter 9 is a cylindrical component located in the first hole 8 and has a filter screen at the top. The hole pipe filter 9 is provided with a filter screen at the top, which can prevent larger impurities from entering the oil path. The first hole 8 is a through hole, which ensures the smoothness of the oil path, and the structure of the hole pipe filter 9 installed in the first hole 8 makes it fixed, ensuring the stability of the filtering effect. The structure of the first hole 8 adjacent to the third groove 7 promotes the communication of the oil path.

[0031] Further, the second hole 12 is a through hole located on the middle body 11 and aligned with the through hole 10; the inclined hole 13 is located on the middle body 11 and connected with the second hole 12 and extends obliquely downward. The second hole 12 is aligned with the through hole 10, and the inclined hole 13 is connected with the second hole 12 and inclined, forming a continuous oil passage channel to guide the filtered lubricating oil to the main bearing 14. This design ensures the flow direction of the lubricating oil and realizes accurate lubrication of the main bearing 14.

[0032] Further, the main bearing 14 is a ring-shaped component located below the middle body 11 and supporting the rotating component. The ring-shaped structure of the main bearing 14 can support the rotating component, and its position below the middle body 11 can directly obtain sufficient lubrication of the lubricating oil, reducing wear.

[0033] In this embodiment, the static scroll plate 1 constitutes part of the scroll compressor, and is provided with grooves, exhaust cavities 4, holes and other structures, and has an irregular disc structure with multiple protrusions and depressions. The sealing gasket 2 is tightly assembled with the static scroll plate 1, is provided with grooves, has an irregular ring shape, and has an irregular hollow in the middle. The first groove 3 on the static scroll plate 1 is used to guide the oil-gas mixture. The circular depression in the center of the static scroll plate 1 is the exhaust cavity 4, which is used to receive the oil-gas mixture. The annular groove outside the exhaust cavity 4 is the second groove 5, which is used to collect liquid oil. The irregular depression area outside the second groove 5 is the low-pressure cavity 6, which is used to receive liquid oil from the second groove 5. The long strip-shaped groove on the sealing gasket 2 is the third groove 7, which communicates with the hole tube filter 9. The through hole on the static scroll plate 1 adjacent to the third groove 7 is the first hole 8, which is used to install the hole tube filter 9. The cylindrical component in the first hole 8 is the hole tube filter 9, which has a filter screen at the top and is used to filter lubricating oil and has a throttling effect. The circular small hole at the bottom of the hole tube filter 9 is the through hole 10, which is used to control the flow of oil. The middle body 11 of the scroll compressor is located below the static scroll plate 1 and has a complex internal structure, which is provided with holes and inclined holes. The through hole on the middle body 11 aligned with the through hole 10 is the second hole 12, which communicates with the through hole 10 of the hole tube filter 9. The hole on the middle body 11 connected with the second hole 12 and extending obliquely downward is the inclined hole 13, which guides the lubricating oil to the main bearing 14. The main bearing 14 of the scroll compressor is located below the middle body 11 and is a ring-shaped component used to support the rotating component and needs to be lubricated. There is a bend 15 between the second groove 5 and the low-pressure cavity 6. A plurality of protrusions 16 are provided in the second groove 5. In this embodiment, the protrusions 16 are arranged in parallel. The gaps between the plurality of protrusions 16 are aligned with the inlet of the bend 15

[0034] The high-speed oil-gas mixture is ejected from the high-pressure exhaust port and splashes onto the four walls of the exhaust cavity 4 through the first groove 3. The liquid oil will collect along the walls of the exhaust cavity 4 and flow into the low-pressure cavity 6 through the second groove 5. A bend 15 is provided between the second groove 5 and the low-pressure cavity 6 to connect the two. A plurality of protrusions 16 are provided in the second groove 5. The pressure difference between the high-pressure cavity and the low-pressure cavity will cause the oil to be pressed into the hole-tube filter 9 in the first hole 8 through the third groove 7. The third groove 7 is in communication with the hole-tube filter 9 in the first hole 8. The hole-tube filter 9 is installed in the first hole 8. The bottom of the hole-tube filter 9 is a through hole 10. The oil flows into the second hole 12 on the middle body 11 through the through hole 10 of the hole-tube filter 9. The oil flows from the second hole 12 on the middle body 11 into the main bearing 14 through the inclined hole 13. The inclined hole 13 introduces lubricating oil into the main bearing 14.

[0035] In addition, Figure 3 The third groove 7 on the middle sealing gasket 2 is S-shaped. Compared with a straight groove, the S-shaped design increases the length of the oil passage in a limited space. This makes the lubricating oil have a longer path when flowing through the third groove 7, and the flow rate can be buffered to a certain extent, avoiding the direct impact of the oil on the hole-tube filter 9, which helps to protect the hole-tube filter 9 and prolong its service life, while also reducing pressure fluctuations in the oil passage. The end of the third groove 7 is not directly connected to the low-pressure cavity 6. The main function of the third groove 7 is to guide the lubricating oil from the low-pressure area to the hole-tube filter 9 (installed in the first hole 8). It is not directly connected to the low-pressure cavity 6. When the sealing gasket 2 is tightly attached to the static scroll plate 1, the third groove 7 on the sealing gasket 2 forms a relatively closed channel with the surface of the static scroll plate 1.

[0036] When the scroll compressor is running, the pressure in the low-pressure cavity 6 is lower than the pressure at the connection between the third groove 7 and the hole-tube filter 9 (because the hole-tube filter 9 has a throttling effect). This pressure difference is the main driving force for the lubricating oil to flow from the area near the low-pressure cavity 6 to the third groove 7 and then into the hole-tube filter 9.

[0037] The design of the end of the third groove 7 allows lubricating oil to enter the third groove 7 from the sealing surface formed by the attachment of the static scroll plate 1 and the sealing gasket 2. Further, the oil near the low-pressure cavity 6 on the static scroll plate will flow to the third groove 7. If the third groove 7 were to extend directly to the edge of the low-pressure cavity 6, it could cause excessive concentration of lubricating oil at the entrance of the groove, which would be detrimental to the uniform distribution and flow of the oil. If the third groove 7 were too close to the edge of the low-pressure cavity 6, it could cause stress concentration on the sealing gasket 2, affecting the sealing effect.

[0038] The remaining structures, such as the rear cover provided on the sealing gasket 2 and other various housings, are embodied in the accompanying drawings and are conventional structures in the art, so they will not be described here. Figure 1 The remaining structures, such as the rear cover provided on the sealing gasket 2 and other various housings, are embodied in the accompanying drawings and are conventional structures in the art, so they will not be described here.

Claims

1. A scroll compressor characterized by, It comprises: A static scroll (1) provided with an exhaust cavity (4), a first hole (8), and a second groove (5) communicating with the exhaust cavity (4); a middle machine body (11) located below the static scroll (1) and provided with a second hole (12) communicating with the first hole (8); a main bearing (14) located below the middle machine body (11); A hole tube filter (9) installed in the first hole (8), and the hole tube filter (9) is provided with a through hole (10) communicating with the second hole (12) at the bottom.

2. The scroll compressor of claim 1, wherein The middle machine body (11) is also provided with an inclined hole (13) communicating with the second hole (12) and extending downwardly, and the inclined hole (13) is connected with the main bearing (14).

3. The scroll compressor of claim 2, wherein, It also includes a sealing gasket (2) sealingly assembled with the static scroll (1); the sealing gasket (2) is provided with a third groove (7) adjacent to the first hole (8) on the static scroll (1), and the third groove (7) communicates with the hole tube filter (9).

4. The scroll compressor of claim 3, wherein The static scroll (1) is also provided with a low pressure cavity (6), the second groove (5) communicates with the low pressure cavity (6) through a bend (15), and the low pressure cavity (6) communicates with the third groove (7); a plurality of protrusions (16) are also arranged in the second groove (5).

5. The scroll compressor of claim 4, wherein, The static scroll (1) is also provided with a first groove (3) communicating with the exhaust cavity (4).

6. The scroll compressor of claim 5, wherein, The first hole (8) is a through hole located on the static scroll (1) and adjacent to the third groove (7); the hole tube filter (9) is a cylindrical part located in the first hole (8) and has a filter screen at the top.

7. The scroll compressor of claim 6, wherein The second hole (12) is a through hole located on the middle machine body (11) and aligned with the through hole (10); the inclined hole (13) is located on the middle machine body (11) and extends downwardly.

8. The scroll compressor of claim 7, wherein, The main bearing (14) is a ring-shaped part located below the middle machine body (11) and supporting a rotating part.

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