Scroll compressor

Abstract

The invention discloses a scroll compressor which comprises a shell, and an oil storage pool is arranged at the bottom of the shell; the driving shaft is provided with an oil hole; the oil hole is communicated with the oil reservoir; the main bearing seat is provided with a bearing hole, and the main bearing seat is arranged on the periphery of the driving shaft in a sleeving mode through the bearing hole; the main bearing seat is also provided with a friction supporting surface; the device is characterized in that the driving shaft is provided with an oil inlet channel communicated with an oil hole of the driving shaft; the main bearing seat is provided with an oil conveying channel used for communicating the oil inlet channel with the friction supporting face. In the working state, lubricating oil in the oil storage pool is pumped to sequentially pass through the oil hole, the oil inlet channel and the oil conveying channel to be conveyed to the friction supporting face. The oil inlet channel allowing the lubricating oil to be discharged is formed in the driving shaft, the oil conveying channel enabling the oil inlet channel to be communicated with the friction part is formed in the main bearing seat, the lubricating oil is conveyed to the friction part through the oil inlet channel and the oil conveying channel, and after the compressor is started, the lubricating oil can be stably and rapidly conveyed to the friction part for lubrication.

Description

Technical Field

[0001] This invention belongs to the field of scroll compressor technology, and particularly relates to a scroll compressor. Background Technology

[0002] A scroll compressor is a positive displacement compressor. Its compression components mainly consist of a moving scroll and a stationary scroll. It utilizes the relative revolution of the moving and stationary scrolls to create a continuous change in the closed volume, thereby achieving the purpose of compressing gas.

[0003] As scroll compressors develop towards larger displacements, it is necessary to widen the thrust surface of the main bearing housing to reduce the average load on the thrust surface and lower the risk of wear. However, widening the thrust surface can prevent lubricating oil from adequately lubricating the central area of ​​the thrust surface, leading to compressor wear. In large-displacement compressors, the thrust surface experiences significant forces, requiring rapid oil supply during startup to ensure it does not wear due to insufficient lubrication.

[0004] Existing technology discloses a compressor with an oil delivery channel formed in the main bearing housing, extending from a recess to a thrust surface, allowing lubricant in the recess to be supplied to the thrust surface via the oil delivery channel. The lubricant contacts the thrust surface through the oil delivery channel, lubricating the thrust surface during the translational motion of the scroll plate. During the operation of the scroll compressor, the internal pressure fluctuates with the working cycle. This pressure fluctuation may affect the stability of the oil in the recess, leading to insufficient or excessive oil supply under certain operating conditions. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides a scroll compressor in which lubricating oil can be quickly and stably delivered to the friction support surface after the compressor is started.

[0006] Specifically, this invention discloses a scroll compressor, comprising:

[0007] The casing; the bottom of the casing has an oil storage tank;

[0008] A drive shaft; the drive shaft is provided with an oil hole; the oil hole is connected to the oil storage tank;

[0009] Main bearing housing; the main bearing housing has a bearing hole, and the main bearing housing is fitted onto the outer periphery of the drive shaft through the bearing hole; the main bearing housing also has a friction support surface;

[0010] Its features are,

[0011] The drive shaft is provided with an oil inlet channel that communicates with the oil hole of the drive shaft;

[0012] The main bearing housing is provided with an oil delivery channel for connecting the oil inlet channel and the friction support surface;

[0013] In operation, the lubricating oil in the oil reservoir is pumped sequentially through the oil hole, the oil inlet channel, and the oil delivery channel to the friction support surface.

[0014] Furthermore, the scroll compressor also includes a compression assembly, which includes a moving scroll disk and a stationary scroll disk that cooperate with each other, and the moving scroll disk has a contact surface;

[0015] A cross slip ring is provided between the moving scroll plate and the main bearing housing;

[0016] The main bearing housing has a thrust surface that abuts against the contact surface and a cross-slip ring support surface that matches the cross-slip ring;

[0017] The contact area between the contact surface and the thrust surface is the first friction area, and the contact area between the cross slip ring and the cross slip ring support surface is the second friction area.

[0018] The friction support surface includes at least one of the thrust surface and the cross slip ring support surface.

[0019] Furthermore, a first connecting groove is provided on the outer wall of the drive shaft; the oil outlet end of the oil inlet channel is connected to the first connecting groove; the first connecting groove is a closed annular groove extending circumferentially along the drive shaft, so that when the drive shaft rotates, the oil inlet channel and the oil delivery channel remain connected through the first connecting groove.

[0020] or,

[0021] A first connecting groove is provided on the outer wall of the drive shaft; the oil outlet end of the oil inlet channel is connected to the first connecting groove; the first connecting groove is a non-closed annular groove extending circumferentially along the drive shaft, so that when the drive shaft rotates, the oil inlet channel and the oil delivery channel are intermittently connected through the first connecting groove.

[0022] or,

[0023] A second connecting groove is provided on the inner wall of the bearing hole; the oil inlet end of the oil supply channel is connected to the second connecting groove; the second connecting groove is a closed annular groove extending circumferentially along the bearing hole, so that when the drive shaft rotates, the oil inlet channel and the oil supply channel remain connected through the second connecting groove.

[0024] or,

[0025] A second connecting groove is provided on the inner wall of the bearing hole; the oil inlet end of the oil supply channel is connected to the second connecting groove; the second connecting groove is a non-closed annular groove extending circumferentially along the bearing hole, so that when the drive shaft rotates, the oil inlet channel and the oil supply channel are intermittently connected through the second connecting groove.

[0026] or,

[0027] A first connecting groove is provided on the outer wall of the drive shaft; the oil outlet end of the oil inlet channel is connected to the first connecting groove; and a second connecting groove is provided on the inner wall of the bearing hole; the oil inlet end of the oil delivery channel is connected to the second connecting groove; the first connecting groove extends circumferentially along the drive shaft, and the second connecting groove extends circumferentially along the bearing hole, so that when the drive shaft rotates, the oil inlet channel and the oil delivery channel are connected through the first connecting groove and the second connecting groove.

[0028] Furthermore, two axially arranged sealing rings are provided in the gap between the outer wall of the drive shaft and the inner wall of the bearing hole, and the oil inlet channel is located between the two sealing rings.

[0029] Furthermore, the friction support surface includes a thrust surface; the thrust surface is provided with a non-closed lubricating oil channel that allows the flow of lubricating oil, the lubricating oil channel having an oil discharge end, through which the lubricating oil is discharged.

[0030] Furthermore, the number of the lubricating oil passages is more than one, and they are arranged regularly or irregularly along the circumference of the thrust surface.

[0031] Furthermore, the lubricating oil passage is a C-shaped groove, a curved groove, or a zigzag groove.

[0032] Furthermore, there are two oil discharge ends, located at both ends of the lubricating oil passage, and the oil delivery channel is connected to the middle position of the lubricating oil passage; or,

[0033] The number of oil discharge ends is one, located at one end of the lubricating oil passage, and the oil delivery passage is connected to the other end of the lubricating oil passage.

[0034] Furthermore, the oil discharge end has a flow-limiting section to restrict the flow rate of lubricating oil.

[0035] Furthermore, the current limiting part is at least one of the following:

[0036] The funnel-shaped structure has a flow-limiting section in which the flow area near the outlet is smaller than the flow area near the inlet.

[0037] An upward-protruding boss;

[0038] An upward-convex slope;

[0039] Filter screen;

[0040] A crossbar connected to the side wall of the oil drain end.

[0041] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0042] An oil inlet channel is opened on the drive shaft to allow lubricating oil to be discharged through the oil hole, and an oil delivery channel is set on the main bearing housing to connect the oil inlet channel with the friction part. The lubricating oil is delivered to the friction support surface through the oil hole, the oil inlet channel and the oil delivery channel. After the compressor starts, the lubricating oil can be delivered to the friction support surface stably and quickly for lubrication. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0044] Figure 1 This is a cross-sectional view of a scroll compressor;

[0045] Figure 2 This is a schematic diagram of a moving vortex disk;

[0046] Figure 3 This is a schematic diagram of the lubricating oil passage on the thrust surface;

[0047] Figure 4 It is a cross-sectional view of the oil inlet channel and the oil delivery channel;

[0048] Figure 5 It is a transverse sectional view of the first connecting groove being opened on the side wall of the drive shaft, and the cross section being a closed annular groove;

[0049] Figure 6 It is a transverse sectional view of the first connecting groove being opened on the side wall of the drive shaft, and the cross-section being a non-closed annular groove;

[0050] Figure 7 It is a transverse sectional view of the second connecting groove being opened on the inner wall of the bearing hole, and the cross section being a closed annular groove;

[0051] Figure 8 It is a transverse sectional view of the second connecting groove being opened on the inner wall of the bearing hole, and the cross section being a non-closed annular groove;

[0052] Figure 9 It is a transverse sectional view of the first connecting groove being opened on the side wall of the drive shaft and the second connecting groove being opened on the inner wall of the bearing hole;

[0053] Figure 10 It is a cross-sectional view of the first and / or second connecting groove extending axially;

[0054] Figure 11 It is a cross-sectional view showing the seal between the drive shaft and the main bearing housing;

[0055] Figure 12 This is a magnified view of the sealing ring arrangement.

[0056] Figure 13 This is a schematic diagram showing that the oil delivery channel is simultaneously connected to the cross-shaped slip ring support surface and the lubrication oil passage;

[0057] Figure 14 This is a top view of the first embodiment of the lubrication oil passage;

[0058] Figure 15 This is a top view of the second embodiment of the lubrication oil passage;

[0059] Figure 16 This is a top view of the third embodiment of the lubrication oil passage;

[0060] Figure 17 This is a top view of the fourth embodiment of the lubrication oil passage.

[0061] The reference numerals in the attached drawings are as follows: housing 1, compression assembly 2, moving scroll 21, contact surface 211, stationary scroll 22, main bearing seat 3, cross slip ring support surface 30, thrust surface 31, lubricating oil passage 32, oil discharge end 33, flow limiting part 34, oil delivery channel 35, oil inlet end 351, second connecting groove 36, bearing hole 37, sealing ring 38, drive shaft 4, oil hole 41, oil inlet channel 42, first connecting groove 43, floating sealing disc 5, isolation plate 6, drive motor 7, cross slip ring 8, oil reservoir 9, first friction part 10, second friction part 11. Detailed Implementation

[0062] The present invention will now be described in further detail with reference to the accompanying drawings.

[0063] like Figure 1-17 As shown, this invention discloses a scroll compressor, the overall structure and operation of which are as follows:

[0064] A scroll compressor typically includes a housing 1, a compression assembly 2 disposed inside the housing 1, a main bearing housing 3 supporting the compression assembly 2, an oil reservoir 9 disposed at the bottom of the housing 1, and a drive shaft 4 for driving the compression assembly 2. The compression assembly 2 is disposed in the upper part of the housing 1 and is supported by the main bearing housing 3. The compression assembly 2 includes a stationary scroll 22 and a moving scroll 21. The moving scroll 21 has an end plate and a contact surface 211 at the bottom of the end plate. The main bearing housing 3 has a thrust surface 31 that abuts against the contact surface 211. The drive shaft 4 is controlled by a drive motor 7, and one end of the drive shaft 4 is connected to the moving scroll 21. Under the action of the drive motor 7, the moving scroll 21 moves around the stationary scroll 22 to compress the refrigerant.

[0065] In order to improve the sealing performance of the compression assembly 2 and the compression efficiency of the refrigerant, a floating sealing disc 5 is provided above the compression assembly 2. The floating sealing disc 5 applies downward pressure to the stationary scroll 22. The downward pressure is greater than the separation force on the stationary scroll 22, so that the stationary scroll 22 and the moving scroll 21 are pressed together and sealed.

[0066] In addition, the center of the scroll compressor stationary scroll 22 is provided with an exhaust port, and an isolation plate 6 is provided above the exhaust port. The cavity formed between the upper side of the isolation plate 6 and the housing 1 is a high-pressure cavity, and the cavity formed between the lower side of the isolation plate 6 and the housing 1 is a low-pressure cavity. The high-pressure gas discharged from the exhaust port passes through the isolation plate 6 and the silencer and enters the high-pressure cavity.

[0067] During the operation of the scroll compressor, the moving scroll disk 21 needs to perform periodic planar circular motion around the base circle center of the stationary scroll disk 22 under the drive of the drive shaft 4. In order to prevent the moving scroll disk 21 from rotating on its own during the rotation, a cross slip ring 8 is provided between the main bearing housing 3 and the moving scroll disk 21. The main bearing housing 3 is provided with a cross slip ring support surface 30 that cooperates with the cross slip ring 8. The design of the cross slip ring 8 can prevent this unnecessary rotation and ensure the accuracy of the motion trajectory.

[0068] In the scroll compressor of the present invention, an oil hole 41 is provided on the drive shaft, the oil hole 41 is connected to the oil reservoir 9, the main bearing housing 3 is fitted on the outer periphery of the drive shaft 4 through the bearing hole 37, the main bearing housing 3 also has a friction support surface, the drive shaft 4 is provided with an oil inlet channel 42 connected to the oil hole 41 of the drive shaft 4; the main bearing housing 3 is provided with an oil delivery channel 35 for connecting the oil inlet channel 42 and the friction support surface; in the working state, the lubricating oil in the oil reservoir 9 is pumped and sequentially transported through the oil hole 41, the oil inlet channel 42 and the oil delivery channel 35 to the friction support surface.

[0069] During the operation of the scroll compressor, the drive motor 7 causes the drive shaft 4 to rotate at high speed. Every time the drive shaft 4 rotates once, the oil inlet channel 42 and the oil delivery channel 35 are connected once. Under the action of pressure, the lubricating oil flows through the oil inlet channel 42 and the oil delivery channel 35 to the friction support surface to provide it with lubricating oil.

[0070] In addition, the contact area between the contact surface 211 and the thrust surface 31 is the first friction part 10, and the contact area between the cross slip ring 8 and the cross slip ring support surface 30 is the second friction part 11. The friction support surface includes at least one of the thrust surface 31 and the cross slip ring support surface.

[0071] In some implementation schemes, such as Figure 4As shown, the oil inlet channel 42 is arranged radially along the drive shaft 4, and there is more than one oil inlet channel 42, so that the lubricating oil can be discharged more smoothly and faster through the oil inlet channel 42.

[0072] In some implementation schemes, such as Figure 5 As shown, a first connecting groove 43 is provided on the outer wall of the drive shaft 4; the oil outlet end of the oil inlet channel 42 is connected to the first connecting groove 43; the first connecting groove 43 is a closed annular groove extending circumferentially along the drive shaft 4, so that when the drive shaft 4 rotates, the oil inlet channel 42 and the oil delivery channel 35 remain connected through the first connecting groove 43.

[0073] Or, such as Figure 6 As shown, a first connecting groove 43 is provided on the outer wall of the drive shaft 4; the oil outlet end of the oil inlet channel 42 is connected to the first connecting groove 43; the first connecting groove 43 is a non-closed annular groove extending circumferentially along the drive shaft 4, so that when the drive shaft 4 rotates, the oil inlet channel 42 and the oil delivery channel 35 are intermittently connected through the first connecting groove 43.

[0074] Or, such as Figure 7 As shown, a second connecting groove 36 is provided on the inner wall of the bearing hole 37; the oil inlet end of the oil supply channel 35 is connected to the second connecting groove 36; the second connecting groove 36 is a closed annular groove extending circumferentially along the bearing hole 37, so that when the drive shaft 4 rotates, the oil inlet channel 42 and the oil supply channel 35 remain connected through the second connecting groove 36.

[0075] Or, such as Figure 8 As shown, a second connecting groove 36 is provided on the inner wall of the bearing hole 37; the oil inlet end of the oil supply channel 35 is connected to the second connecting groove 36; the second connecting groove 36 is a non-closed annular groove extending circumferentially along the bearing hole 37, so that when the drive shaft 4 rotates, the oil inlet channel 42 and the oil supply channel 35 are intermittently connected through the second connecting groove 36.

[0076] Or, such as Figure 9 As shown, a first connecting groove 43 is provided on the outer wall of the drive shaft 4; the oil outlet end of the oil inlet channel 42 is connected to the first connecting groove 43; and a second connecting groove 36 is provided on the inner wall of the bearing hole 37; the oil inlet end of the oil delivery channel 35 is connected to the second connecting groove 36; the first connecting groove 43 extends circumferentially along the drive shaft 4, and the second connecting groove 36 extends circumferentially along the bearing hole 37, so that when the drive shaft 4 rotates, the oil inlet channel 42 and the oil delivery channel 35 are connected through the first connecting groove 43 and the second connecting groove 36.

[0077] When the outer wall of the drive shaft 4 is provided with a first connecting groove 43 and the inner wall of the bearing hole 37 is provided with a second connecting groove 36, the first connecting groove 43 is a closed annular groove or a non-closed annular groove extending circumferentially along the drive shaft 4, and the second connecting groove 36 is a closed annular groove or a non-closed annular groove extending circumferentially along the bearing hole 37, so that when the drive shaft 4 rotates, the oil inlet channel 42 and the oil delivery channel 35 are connected through the first connecting groove 43 and the second connecting groove 36.

[0078] Furthermore, in the above-described implementation scheme, such as Figure 10 As shown, the first connecting groove or / and the second connecting groove can also be extended axially, which allows the oil inlet end 351 of the oil inlet channel 42 or the oil supply channel 35 to have a large positional error.

[0079] During the rotation of the drive shaft 4, the oil pump causes lubricating oil to enter each oil delivery channel 35 intermittently or continuously, increasing the flow rate of lubricating oil delivered into the oil delivery channel 35, thereby increasing the flow rate of lubricating oil in the lubrication channel 32 and improving the heat dissipation and lubrication effects.

[0080] In some implementations, such as Figure 11 , 12 As shown, two axially arranged sealing rings 38 are provided in the gap between the outer wall of the drive shaft 4 and the bearing hole 37. The oil outlet of the oil inlet channel 42 is located between the two sealing rings 38 to prevent lubricating oil from leaking in the gap. In practical applications, the gap between the outer wall of the drive shaft 4 and the bearing hole 37 is approximately 0.1mm-0.5mm. The gap is small, and the oil coming out of the oil inlet channel 42 will not leak from the gap during high-speed rotation. Therefore, the sealing rings 38 can be omitted.

[0081] In some implementation schemes, such as Figure 3 As shown, the friction support surface includes a thrust surface 31; the thrust surface 31 is provided with a non-closed lubricating oil channel 32 that allows the flow of lubricating oil, and the lubricating oil channel 32 has an oil discharge end 33. The lubricating oil is discharged through the lubricating oil channel 32 at the oil discharge end 33, carrying away the heat on the friction part.

[0082] In addition, in the above-described embodiments, the oil drain end 33 may be connected to the inner or outer side of the thrust surface 31. The thrust surface 31 is an annular surface, with its inner side being the inner ring of the annular surface and its outer side being the outer ring of the annular surface. The lubricating oil in the lubricating oil passage 32 flows out of the thrust surface 31 along the oil drain end 33, carrying away the heat generated by the friction between the thrust surface 31 and the contact surface 211.

[0083] In some implementation schemes, such as Figure 14-17As shown, there is one or more lubricating oil passages 32, which are arranged regularly or irregularly along the circumference of the thrust surface 31. In this case, the lubricating oil passage 32 can be set as a C-shaped groove, a curved groove, or a zigzag groove, or it can be set as a groove of other shapes.

[0084] In this embodiment, two oil discharge ends 33 are set, respectively located at both ends of the lubricating oil passage 32. The oil supply passage 35 is connected to the middle position of the lubricating oil passage 32, so that the lubricating oil at the outlet of the oil supply passage 35 flows to the two oil discharge ends 33 with the same stroke, providing lubricating oil to the lubricating oil passage 32, and then being discharged through the oil discharge ends 33.

[0085] In another embodiment of this scheme, the difference from the above embodiment lies in the positions of the oil discharge end 33 and the oil delivery channel 35. The oil discharge end 33 may also be located at one end of each lubrication oil passage 32, and the oil delivery channel 35 at the other end of each lubrication oil passage 32. Lubricating oil flows out through the oil delivery channel 35, passes through the lubrication oil passage 32, and is discharged through the oil discharge end 33. When there are multiple lubrication oil passages 35, there are also multiple oil delivery channels 35, increasing the flow rate of lubricating oil delivered into the oil delivery channel 35, thereby increasing the flow velocity of the lubricating oil within the lubrication oil passage 32 and improving heat dissipation.

[0086] In addition, such as Figure 13 As shown, when multiple oil passages 32 and oil delivery channels 35 are provided, and the contact areas of the oil delivery channels 35, the thrust surface 31, and the contact areas of the contact surface 211, and the cross slip ring support surface 30 and the cross slip ring 8 are all connected, one or two oil delivery channels 35 that are simultaneously connected to the cross slip ring support surface 30 and the oil passages 32 can be arranged. At this time, the oil delivery channels 35 can supply oil to the cross slip ring support surface 30 and the oil passages 32 at the same time, which improves the processing efficiency of the main bearing housing 3.

[0087] In some implementation schemes, such as Figure 3 As shown, in order to increase the residence time of lubricating oil on the thrust surface 31 and increase the liquid level in the lubricating oil passage 32, a flow-limiting part 34 is provided on the oil discharge end 33 to restrict the outflow of lubricating oil. The flow-limiting part 34 is at least one of the following:

[0088] The funnel-shaped structure, and in the flow-limiting part 34 of the funnel-shaped structure, the flow area near the outlet is smaller than the flow area near the inlet;

[0089] An upward-protruding boss;

[0090] Filter screen;

[0091] A crossbar connected to the side wall of the oil drain end.

[0092] The main function of the flow restrictor 34 is to increase the level of the lubricating oil in the lubricating oil passage 32, thereby improving the lubrication effect between the contact surface 211 and the thrust surface 31.

[0093] On the other hand, in order to reduce the flow loss in the lubricating oil passage 32, an arc is set between the oil discharge end 33 and the annular groove for transition. In this way, when the lubricating oil is discharged, the impact generated by the contact between the lubricating oil and the oil discharge end 33 will be reduced, thereby increasing the flow rate of the lubricating oil and improving the heat dissipation effect.

[0094] The flow direction of the lubricating oil is as follows:

[0095] The lubricating oil is forced through the oil hole 41 and the oil inlet channel 42 via the oil fork. During the high-speed rotation of the drive shaft 4, the oil inlet channel 42 and the oil delivery channel 35 are intermittently or continuously connected. Under the action of oil pressure, the lubricating oil enters the oil delivery channel 35 intermittently or continuously, and then enters the first friction part 10 and / or the second friction part 11, providing lubricating oil for the first friction part 10 and / or the second friction part 11. When the lubricating oil enters the lubricating oil passage 32, the lubricating oil flows along the lubricating oil passage 32 to the oil outlet ends 33 on both sides. At the same time, the lubricating oil in the lubricating oil passage 32 contacts the contact surface 211 and the thrust surface 31, achieving the effect of lubricating the thrust surface 31. The flow limiting part 34 increases the liquid level of the lubricating oil in the thrust surface 31, so that the lubricating oil passage 32 is always kept in the lubricating oil passage 32. When the lubricating oil enters the cross slip ring support surface 30, the lubricating oil lubricates the reciprocating cross slip ring 8. In addition, after the lubricating oil passes through the lubrication channel 32 and the cross slip ring support surface 30, it will carry away the heat generated during the operation of the friction part, thereby improving the service life of the compressor.

[0096] For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this invention, and these all fall within the protection scope of this invention.

Claims

1. A scroll compressor comprising: a housing (1); the housing (1) has an oil reservoir (9) at the bottom; a drive shaft (4); the drive shaft (4) is provided with an oil hole (41); the oil hole (41) is in communication with the oil reservoir; a main bearing seat (3); the main bearing seat (3) has a bearing hole (37), the main bearing seat (3) is sleeved on the outer circumference of the drive shaft (4) through the bearing hole (37); the main bearing seat (3) is further provided with a friction support surface; characterized in that, the drive shaft (4) is provided with an oil inlet channel (42) in communication with the oil hole (41) of the drive shaft (4); the main bearing seat (3) is provided with an oil delivery channel (35) for communicating the oil inlet channel (42) and the friction support surface; in the working state, the lubricating oil in the oil reservoir (9) is pumped to be sequentially delivered to the friction support surface through the oil hole (41), the oil inlet channel (42) and the oil delivery channel (35).

2. The scroll compressor of claim 1, wherein The scroll compressor further comprises a compression assembly (2), the compression assembly (2) comprises a dynamic scroll (21) and a static scroll (22) matched with each other, and the dynamic scroll (21) has a contact surface (211); a cross slide ring (8) is arranged between the dynamic scroll (21) and the main bearing seat (3); the main bearing seat (3) has a thrust surface (31) abutting against the contact surface (211), and a cross slide ring support surface (30) matched with the cross slide ring (8); the contact area of the contact surface (211) and the thrust surface (31) is a first friction part (10), and the contact area of the cross slide ring (8) and the cross slide ring support surface (30) is a second friction part (11); the friction support surface comprises at least one of the thrust surface (31) and the cross slide ring support surface (30).

3. The scroll compressor of claim 1, wherein The outer wall of the drive shaft (4) is provided with a first communication groove (43); the oil outlet end of the oil inlet channel (42) is in communication with the first communication groove (43); the first communication groove (43) is a closed annular groove extending along the circumference of the drive shaft (4), so that the oil inlet channel (42) and the oil delivery channel (35) are kept in communication through the first communication groove (43) when the drive shaft (4) rotates; Alternatively, the outer wall of the drive shaft (4) is provided with a first communication groove (43); the oil outlet end of the oil inlet channel (42) is in communication with the first communication groove (43); the first communication groove (43) is a non-closed annular groove extending along the circumference of the drive shaft (4), so that the oil inlet channel (42) and the oil delivery channel (35) are intermittently communicated through the first communication groove (43) when the drive shaft (4) rotates; Alternatively, The inner wall of the bearing hole (37) is provided with a second communication groove (36); the oil inlet end of the oil conveying channel (35) communicates with the second communication groove (36); the second communication groove (36) is a closed annular groove extending along the circumference of the bearing hole (37), so that the oil inlet channel (42) and the oil conveying channel (35) are kept in communication through the second communication groove (36) when the driving shaft (4) rotates. Alternatively, The inner wall of the bearing hole (37) is provided with a second communication groove (36); the oil inlet end of the oil conveying channel (35) communicates with the second communication groove (36); the second communication groove (36) is a non-closed annular groove extending along the circumference of the bearing hole (37), so that the oil inlet channel (42) and the oil conveying channel (35) are intermittently communicated through the second communication groove (36) when the driving shaft (4) rotates. Alternatively, The outer wall of the driving shaft (4) is provided with a first communication groove (43); the oil outlet end of the oil inlet channel (42) communicates with the first communication groove (43); and the inner wall of the bearing hole (37) is provided with a second communication groove (36); the oil inlet end of the oil conveying channel (35) communicates with the second communication groove (36); the first communication groove (43) extends along the circumference of the driving shaft (4), and the second communication groove (36) extends along the circumference of the bearing hole (37), so that the oil inlet channel (42) and the oil conveying channel (35) are communicated through the first communication groove (43) and the second communication groove (36) when the driving shaft (4) rotates.

4. The scroll compressor of claim 1, wherein The gap between the outer wall of the driving shaft (4) and the inner wall of the bearing hole (37) is provided with two axially arranged sealing rings (38), and the oil outlet end of the oil inlet channel (42) is arranged between the two sealing rings (38).

5. The scroll compressor of claim 2, wherein, The friction support surface includes a thrust surface (31); the thrust surface (31) is provided with a non-closed lubricating oil channel (32) allowing lubricating oil to flow, and the lubricating oil channel (32) has an oil discharge end (33) through which lubricating oil is discharged.

6. The scroll compressor of claim 5, wherein, The number of lubricating oil channels (32) is more than one, and they are regularly or irregularly arranged along the circumference of the thrust surface (31).

7. The scroll compressor of claim 5, wherein The lubricating oil channel (32) is a C-shaped groove, a curved groove or a broken line groove.

8. The scroll compressor of claim 5, wherein, The number of oil discharge ends (33) is two, arranged at both ends of each lubricating oil channel (32), and the oil conveying channel (35) communicates with the middle position of each lubricating oil channel (32); or The number of oil discharge ends (33) is one, arranged at one end of each lubricating oil channel (32), and the oil conveying channel (35) communicates with the other end of each lubricating oil channel (32).

9. The scroll compressor of claim 5, wherein, The oil discharge end (33) has a flow limiting part (34) for limiting the flow of lubricating oil.

10. The scroll compressor of claim 9, wherein, The flow limiting part (34) is at least one of the following: Funnel structure, and the flow limiting part (34) of the funnel structure has a flow passage area closer to the outlet smaller than that closer to the inlet; An upwardly protruding boss; An upwardly protruding inclined surface; A filter screen; A crossbar connected to the side wall of the oil discharge end (33).

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