Scroll compressor

Abstract

The invention provides a scroll compressor which comprises a static scroll plate, and an exhaust cavity, a first hole and a second groove communicated with the exhaust cavity are formed in the static scroll plate; 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 present application relates to a scroll compressor. BACKGROUND

[0002] As a kind of positive 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 vehicles, 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 bearings and auxiliary bearings, 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 the lubrication 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 patent CN221322707U. The compressor includes exhaust cylinder head, static scroll plate, dynamic scroll plate, intermediate body, crankshaft, housing and auxiliary bearing and other components. The technical solution focuses on introducing lubricating oil in the exhaust cavity back to the back pressure cavity through the first drainage channel, the first drainage hole, the second drainage channel and the first drainage groove, and then using 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 the 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 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 lubrication 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. SUMMARY

[0008] The purpose of the present application is to provide a scroll compressor to solve the problem of limited filtering effect of lubricating oil, complex oil path structure and insufficient lubrication of main bearing in the prior art.

[0009] The scroll compressor provided by the present application comprises a static scroll plate, an exhaust cavity, a first hole and a second groove communicated with the exhaust cavity are arranged on the static scroll plate; a middle machine body is arranged below the static scroll plate and is provided with a second hole communicated with the first hole; a main bearing is arranged below the middle machine body; and a hole pipe filter is installed in the first hole and is provided with a through hole communicated with the second hole.

[0010] Through the above structure, the lubricating oil can enter the first hole from the exhaust cavity through the second groove, the hole pipe filter filters the lubricating oil, and the filtered lubricating oil lubricates the middle machine body and the main bearing below through the through hole and the second hole. The above structure realizes effective filtering of the lubricating oil, the hole pipe filter is directly installed in the first hole of the static scroll plate, compared with the filter arranged in the oil return hole in the prior art, it has a larger installation space, and a filter with a larger filtering area can be used, thereby improving 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 scroll compressor further comprises a sealing gasket, the sealing gasket is sealingly assembled with the static scroll plate; a third groove is arranged on the sealing gasket, the third groove is adjacent to the first hole on the static scroll plate, and the third groove 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 groove adjacent to the first hole and communicated with the hole pipe filter, a part of the oil path is formed, the lubricating oil is assisted to flow from the low pressure side to the hole pipe filter, and the oil path structure is further improved. Since the sealing gasket is sealingly assembled with the static scroll plate, the design of the third groove will not affect the sealing effect; at the same time, the third groove is adjacent to the first hole, the oil path distance is shortened, and the flow efficiency of the lubricating oil is improved.

[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 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 a 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 body and aligned with the through hole; and the inclined hole is located on the middle 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 to guide the filtered lubricating oil to the main bearing. This design ensures the flow direction of the lubricating oil and realizes precise lubrication of the main bearing.

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

[0018] In summary, the present application directly installs the hole-pipe filter on the static scroll disc and optimizes the oil path design, 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 diagram of a cross section of a scroll compressor according to an embodiment of the present application.

[0020] Figure 2A structure schematic view of the static scroll plate according to an embodiment of the present application.

[0021] Figure 3 A structure schematic view of the sealing gasket according to an embodiment of the present application. DETAILED DESCRIPTION

[0022] The present application will be further described below in conjunction with the drawings and specific embodiments. It should be noted that the following embodiments are only used to illustrate the present application, but not to limit the scope of the present application.

[0023] Figure 1 A structure schematic view of the scroll compressor according to an embodiment of the present application. Figure 2 A structure schematic view of the static scroll plate according to an embodiment of the present application. Figure 3 A structure schematic view of the sealing gasket according to an embodiment of the present application.

[0024] As shown in the drawings, Figures 1-3 The present application provides a scroll compressor, which comprises a static scroll plate 1, the static scroll plate 1 is provided with an exhaust cavity 4, a first hole 8, and a second groove 5 which is in communication with the exhaust cavity 4; a middle machine body 11, the middle machine body 11 is located below the static scroll plate 1 and is provided with a second hole 12 which is in communication with the first hole 8; a main bearing 14, the main bearing 14 is located below the middle machine body 11; a hole pipe filter 9, the hole pipe filter 9 is installed in the first hole 8, and the bottom of the hole pipe filter 9 is provided with a through hole 10 which is in communication with the second hole 12.

[0025] Through the above structure, the lubricating oil can enter the first hole 8 from the exhaust cavity 4 through the second groove 5, the hole pipe filter 9 filters the lubricating oil, and the filtered lubricating oil lubricates the middle machine body 11 and the lower main bearing 14 through the through hole 10 and the second hole 12. The above structure realizes effective filtration of the lubricating oil, the hole pipe filter 9 is directly installed in the first hole 8 of the static scroll plate 1, compared with the prior art of setting the filter in the oil return hole, it has a larger installation space, and a filter with a larger filtering area can be used, thereby improving the filtering effect.

[0026] Further, the middle machine body 11 is further provided with an inclined hole 13 which is in communication with the second hole 12 and extends downwardly and obliquely, and the inclined hole 13 is connected with the main bearing 14. Through the oblique design of the inclined hole 13, the lubricating oil can be more directly guided to the main bearing 14, realizing direct lubrication of the main bearing 14, reducing the flow path of the lubricating oil, improving the lubrication efficiency, and ensuring that the main bearing 14 is fully lubricated.

[0027] Furthermore, it also includes a sealing gasket 2, which is sealed and assembled with the stationary scroll plate 1. The sealing gasket 2 has a third groove 7, which is adjacent to the first hole 8 on the stationary scroll plate 1 and communicates with the orifice filter 9. The sealing assembly of the sealing gasket 2 effectively prevents leakage of lubricating oil and refrigerant. The third groove 7, adjacent to the first hole 8 and connected to the orifice filter 9, forms part of the oil passage, assisting the lubricating oil to flow from the low-pressure side to the orifice filter 9, further improving the oil passage structure. Because of the sealing assembly of the sealing gasket 2 and the stationary scroll plate 1, the design of the third groove 7 does not affect the sealing effect; at the same time, the third groove 7, adjacent to the first hole 8, shortens the oil passage distance and improves the flow efficiency of the lubricating oil.

[0028] Furthermore, the stationary vortex disk 1 is also equipped with a low-pressure chamber 6. The second groove 5 is connected to the low-pressure chamber 6 via a bend 15, and the low-pressure chamber 6 is connected to the third groove 7. Multiple protrusions 16 are also provided within the second groove 5. The connection between the second groove 5, the bend 15, and the low-pressure chamber 6 forms a complete oil passage, allowing lubricating oil to flow from the exhaust chamber 4 to the low-pressure chamber 6, then to the third groove 7, and finally to the perforated tube filter 9. The multiple protrusions 16 within the second groove 5 increase the contact area between the liquid oil and the wall surface, facilitating liquid oil collection and oil-gas separation. The connection between the low-pressure chamber 6 and the third groove 7, as well as the bend 15 between the second groove 5 and the low-pressure chamber 6, makes the flow of lubricating oil smoother, reducing flow resistance and improving lubrication efficiency. The presence of multiple protrusions 16 increases the contact area between the liquid oil and the inner wall of the groove 5, improving the oil-gas separation effect. The protrusion 16 can change the flow state of liquid oil in the groove 5, generate a certain disturbance, promote the collision and merging of oil droplets, and accelerate oil-gas separation.

[0029] Furthermore, the stationary vortex disk 1 is also provided with a first groove 3, which is connected to the exhaust chamber 4. The connection between the first groove 3 and the exhaust chamber 4 forms the starting part of the oil circuit, guiding the oil-gas mixture into the exhaust chamber 4, thus further improving the oil circuit structure.

[0030] Furthermore, the first hole 8 is a through hole located on the stationary vortex disk 1 and adjacent to the third groove 7; the perforated tube filter 9 is a cylindrical component located within the first hole 8, with a filter screen on top. The filter screen on the top of the perforated tube filter 9 can prevent larger impurities from entering the oil passage. The first hole 8 is a through hole, ensuring the smooth flow of the oil passage. The structure of the perforated tube filter 9 installed within the first hole 8 fixes it in place, ensuring stable filtration. The structure of the first hole 8 adjacent to the third groove 7 promotes the connectivity of the oil passage.

[0031] Furthermore, the second hole 12 is a through hole located on the middle body 11 and aligned with the through hole 10; the oblique hole 13 is located on the middle body 11, connected to the second hole 12, and extends downward at an angle. The alignment of the second hole 12 and the through hole 10, and the connection and angle of the oblique hole 13 to the second hole 12, form a continuous oil passage that guides the filtered lubricating oil to the main bearing 14. This design ensures the flow direction of the lubricating oil and achieves precise lubrication of the main bearing 14.

[0032] Furthermore, the main bearing 14 is a ring-shaped component located below the intermediate body 11, supporting the rotating parts. The ring-shaped structure of the main bearing 14 can support the rotating parts, and its position below the intermediate body 11 allows it to receive more direct and sufficient lubrication from the lubricating oil, reducing wear.

[0033] Specifically, in this embodiment, the stationary scroll plate 1 constitutes part of the scroll compressor. It has grooves, an exhaust chamber 4, holes, and other structures, exhibiting an irregular disk-shaped structure with multiple protrusions and depressions. The sealing gasket 2 is tightly assembled with the stationary scroll plate 1, has grooves, and is an irregular ring shape with irregular hollows in the center. The first groove 3 on the stationary scroll plate 1 guides the oil-gas mixture. The circular depression in the center of the stationary scroll plate 1 is the exhaust chamber 4, used to receive the oil-gas mixture. The annular groove outside the exhaust chamber 4 is the second groove 5, used to collect liquid oil. The irregular recessed area outside the second groove 5 is the low-pressure chamber 6, used to receive liquid oil from the second groove 5. The elongated groove on the sealing gasket 2 is the third groove 7, communicating with the perforated tube filter 9. The through hole adjacent to the third groove 7 on the stationary scroll plate 1 is the first hole 8, used to install the perforated tube filter 9. The cylindrical component inside the first hole 8 is the perforated tube filter 9, with a filter screen at the top for filtering lubricating oil and having a throttling effect. The small circular hole at the bottom of the perforated tube filter 9 is a through hole 10, used to control the oil flow. The middle body 11 of the scroll compressor is located below the stationary scroll plate 1 and has a complex internal structure with holes and oblique holes. The through hole on the middle body 11, aligned with the through hole 10, is a second hole 12, communicating with the through hole 10 of the perforated tube filter 9. The oblique hole 13 on the middle body 11, connected to the second hole 12 and extending downwards, guides the lubricating oil to the main bearing 14. The main bearing 14 of the scroll compressor is located below the middle body 11, is an annular component, used to support rotating components, and requires lubrication. There is a bend 15 connecting the second groove 5 and the low-pressure chamber 6. Multiple protrusions 16 are provided in the second groove 5. In this embodiment, the protrusions 16 are arranged in parallel. The slits of the multiple protrusions 16 are aligned with the entrance of the bend 15.

[0034] High-speed oil-gas mixture exits from the high-pressure exhaust port and splashes onto the four walls of the exhaust chamber 4 through the first groove 3. Liquid oil collects along the walls of the exhaust chamber 4 and flows into the low-pressure chamber 6 through the second groove 5. A bend 15 connecting the second groove 5 and the low-pressure chamber 6 is provided. Multiple protrusions 16 are provided inside the second groove 5. The pressure difference between the high and low pressure chambers forces the oil through the third groove 7 into the perforated tube filter 9 of the first hole 8. The third groove 7 is connected to the perforated tube filter 9 in the first hole 8. The perforated tube filter 9 is installed in the first hole 8. The bottom of the perforated tube filter 9 is a through hole 10. Oil flows into the second hole 12 on the intermediate body 11 through the through hole 10 of the perforated tube filter 9. From the second hole 12 on the intermediate body 11, the oil enters the main bearing 14 through the inclined hole 13. The inclined hole 13 introduces lubricating oil into the main bearing 14.

[0035] also, Figure 3 The third groove 7 on the sealing gasket 2 is S-shaped. Compared to a straight groove, the S-shaped design increases the length of the oil passage within a limited space. This allows the lubricating oil to have a longer path when flowing through the third groove 7, and the flow rate can be buffered to a certain extent, preventing the oil from directly impacting the orifice filter 9, which helps protect the orifice filter 9 and extend its service life. It also reduces pressure fluctuations in the oil passage. The end of the third groove 7 does not directly reach the low-pressure chamber 6. The main function of the third groove 7 is to guide the lubricating oil from the low-pressure area to the orifice filter 9 (installed in the first hole 8). It is not directly connected to the low-pressure chamber 6. When the sealing gasket 2 is tightly fitted with the stationary scroll plate 1, the third groove 7 on the sealing gasket 2 and the surface of the stationary scroll plate 1 form a relatively closed channel.

[0036] When the scroll compressor is running, the pressure in the low-pressure chamber 6 is lower than the pressure at the connection between the third groove 7 and the perforated tube filter 9 (because the perforated 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 chamber 6 to the third groove 7 and then into the perforated tube filter 9.

[0037] The design of the tail end of the third groove 7 allows lubricating oil to enter the third groove 7 from the sealing surface formed by the contact between the stationary scroll plate 1 and the sealing gasket 2. Furthermore, oil near the low-pressure chamber 6 on the stationary scroll plate will flow into the third groove 7. If the third groove 7 extends directly to the edge of the low-pressure chamber 6, it may cause excessive concentration of lubricating oil at the groove inlet, which is detrimental to the uniform distribution and flow of the oil. If the third groove 7 is too close to the edge of the low-pressure chamber 6, it may cause stress concentration on the sealing gasket 2, affecting the sealing effect.

[0038] Other structures, such as the rear cover on the sealing gasket 2, and various other housings, are attached. Figure 1 All of these are reflected in the text and are standard structures in this field, so they will not be elaborated upon here.

Claims

1. A scroll compressor, characterized in that, include: A stationary vortex disk (1) is provided with an exhaust chamber (4), a first hole (8), and a second groove (5) communicating with the exhaust chamber (4); a middle body (11) is located below the stationary vortex disk (1) and is provided with a second hole (12) communicating with the first hole (8); a main bearing (14) is located below the middle body (11); A perforated tube filter (9) is installed in the first hole (8), and the bottom of the perforated tube filter (9) is provided with a through hole (10) communicating with the second hole (12).

2. The scroll compressor according to claim 1, characterized in that, The middle body (11) is also provided with an oblique hole (13) that communicates with the second hole (12) and extends downward at an inclination. The oblique hole (13) is connected to the main bearing (14).

3. The scroll compressor according to claim 2, characterized in that, It also includes a sealing gasket (2), which is sealed and assembled with the stationary vortex disk (1); the sealing gasket (2) is provided with a third groove (7), which is adjacent to the first hole (8) on the stationary vortex disk (1), and the third groove (7) is connected to the perforated tube filter (9).

4. The scroll compressor according to claim 3, characterized in that, The static vortex disk (1) is also provided with a low-pressure chamber (6), the second groove (5) is connected to the low-pressure chamber (6) through a bend (15), and the low-pressure chamber (6) is connected to the third groove (7); the second groove (5) is also provided with a plurality of protrusions (16).

5. The scroll compressor according to claim 4, characterized in that, The static vortex disk (1) is also provided with a first groove (3), which is connected to the exhaust chamber (4).

6. The scroll compressor according to claim 5, characterized in that, The first hole (8) is a through hole located on the static vortex disk (1) and adjacent to the third groove (7); the perforated tube filter (9) is a cylindrical component located in the first hole (8) with a filter screen on top.

7. The scroll compressor according to claim 6, characterized in that, The second hole (12) is a through hole located on the middle body (11) and aligned with the through hole (10); the oblique hole (13) is located on the middle body (11), connected to the second hole (12) and extending obliquely downward.

8. The scroll compressor according to claim 7, characterized in that, The main bearing (14) is an annular component located below the middle body (11) and supporting rotating components.

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