Pump body oil supply structure and scroll compressor

Abstract

The present application provides a pump body oil supply structure and a scroll compressor. The pump body oil supply structure includes a moving plate (1) and a stationary plate (2). The moving plate (1) is provided with a protrusion protruding toward the stationary plate (2) on its end surface facing the stationary plate (2). The stationary plate (2) is provided with a recessed portion on its end surface facing the moving plate (1). The protrusion can be movably arranged in the recessed portion, and the recessed portion is divided into a high-pressure area (3) and a medium-pressure area (4) isolated from each other. The high-pressure area (3) is connected to the high-pressure oil chamber through an oil inlet channel. The recessed portion of the stationary plate (2) is provided with an oil storage chamber (5). The oil storage chamber (5) is intermittently connected to the high-pressure area (3) or the medium-pressure area (4), and oil is stored in the high-pressure area (3), and oil is supplied to the medium-pressure area (4). According to the pump body oil supply structure of the present application, the medium-pressure chamber can be stably supplied with oil, and the oil supply amount can be accurately controlled.

Description

Technical Field

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

[0002] In scroll compressors, the oil supply of the pump body has always been the core issue of compressor technology. In the process of scroll compression, the meshing of the dynamic and static disc profiles, the meshing of the dynamic and static disc tooth tops and tooth bottoms, and the relative sliding of the dynamic and static disc end faces, if any of these mating surfaces is insufficiently supplied with oil, it will cause the compressor to wear or even be scrapped. Therefore, the oil supply structure, especially the design of the pump body oil supply structure, is very important for the compressor. An excellent oil supply structure should not only ensure that the pump body is supplied with sufficient oil and does not wear under all working conditions, but also minimize the energy consumption of the compressor caused by the oil supply itself. In addition, the oil circulation rate is also an issue that must be considered when designing the oil circuit. That is, if the oil supply method of the oil supply structure allows too much refrigerant to dissolve with the oil and be discharged from the compressor, it will cause the compressor to be short of oil and the entire air-conditioning system to have too much oil. Problems such as excessive oil carrying rate, so infinitely increasing the oil supply simply for reliability may not necessarily achieve positive results.

[0003] There are many trade-offs in the lubrication of the pump body of the scroll compressor. Usually, on the back of the moving plate and the outside of the moving plate bearing, the compressor will divide the back pressure chamber of the moving plate into a high-pressure chamber on the inside of the moving plate bearing and a medium-pressure chamber on the outside of the moving plate bearing through a sealing ring. Therefore, the medium-pressure chamber usually includes an anti-rotation mechanism that needs to be lubricated, and the oil stirred to the surface of the static plate will also be brought into the medium-pressure oil tank under the revolution of the moving plate, and then enter the pump body. Usually, the oil entering the medium-pressure chamber cannot return to the bottom oil pool through the oil return mechanism, and can only leave the pump body with the exhaust. Therefore, if the oil supply is too large, it will lead to a large oil circulation rate, a small oil supply, and wear of the anti-rotation mechanism and the pump body. Therefore, a stable oil supply is often pursued during design. However, the prior art still lacks an oil supply structure that can stably supply oil to the medium-pressure chamber. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present application is to provide a pump body oil supply structure and a scroll compressor, which can stably supply oil to the medium-pressure chamber and achieve precise control of the oil supply amount.

[0005] In order to solve the above-mentioned problems, the present application provides a pump body oil supply structure, including a moving plate and a stationary plate, the end surface of the moving plate facing the stationary plate is provided with a protrusion protruding toward the stationary plate, and the end surface of the stationary plate facing the moving plate is provided with a recessed portion, the protrusion can be movably arranged in the recessed portion, and the recessed portion is divided into a high-pressure area and a medium-pressure area isolated from each other, the high-pressure area is connected with the high-pressure oil chamber through an oil inlet channel, and an oil storage chamber is provided on the recessed portion of the stationary plate, and the oil storage chamber is intermittently connected with the high-pressure area or the medium-pressure area, oil is stored in the high-pressure area, and oil is supplied to the medium-pressure area.

[0006] Preferably, the pump body oil supply structure further includes an oil outlet channel, which is connected to the high-pressure area, and the oil entering the high-pressure area from the oil inlet channel can flow out of the high-pressure area through the oil outlet channel.

[0007] Preferably, the protrusion is a convex ring, the recess is an annular groove, the inner ring wall of the convex ring and the inner ring wall of the annular groove form a high-pressure area, and the outer ring wall of the convex ring and the outer ring wall of the annular groove form a medium-pressure area.

[0008] Preferably, the high-pressure area is a dynamic annular oil groove. During the revolution of the moving plate, the range of the high-pressure area changes, but the total area of ​​the high-pressure area remains unchanged.

[0009] Preferably, the oil storage cavity is arranged at the bottom of the recessed portion, and there are at least two oil storage cavities, and at least two oil storage cavities are arranged along the circumference of the stator disk.

[0010] Preferably, there are four oil storage chambers, and the four oil storage chambers are evenly arranged along the circumference of the stator disk.

[0011] Preferably, when the convex ring moves to the oil storage cavity, the convex ring can completely cover the oil storage cavity.

[0012] Preferably, the minimum distance between the oil storage cavity and the outer annular wall of the annular groove is greater than the thickness of the convex ring; and / or the minimum distance between the oil storage cavity and the inner annular wall of the annular groove is greater than the thickness of the convex ring.

[0013] Preferably, when the preset point on the convex ring moves to the farthest position from the inner ring wall of the annular groove, the oil storage chamber located on the same radial direction as the preset point can be completely located in the high-pressure area, and when the preset point on the convex ring moves to the closest position to the inner ring wall of the annular groove, the oil storage chamber located on the same radial direction as the preset point can be completely located in the medium-pressure area.

[0014] Preferably, during the entire movement process of the moving disk, the moving disk does not collide with the inner annular wall or the outer annular wall of the annular groove.

[0015] Preferably, the compression chamber of the stator disk is not in communication with the high pressure area.

[0016] Preferably, a bearing and a first oil supply channel are provided on the moving plate, the bearing is provided on the back side of the moving plate away from the stationary plate, the first end of the first oil supply channel is connected to the high pressure area, and the second end of the first oil supply channel is connected to the inner cavity of the bearing.

[0017] Preferably, the inner cavity of the bearing is a high-pressure cavity, the outer cavity of the bearing is a medium-pressure cavity, and the high-pressure cavity and the medium-pressure cavity are sealed and separated.

[0018] Preferably, a second oil supply channel is provided on the stator disk, a first end of the second oil supply channel is communicated with the high pressure area, and a second end of the second oil supply channel is provided on the outer peripheral side of the annular groove and is spaced apart from the annular groove.

[0019] Preferably, the first end of the second oil supply channel is arranged on the inner circumference of the annular groove, and an oil groove is arranged on the end surface of the stator plate located on the inner circumference of the annular groove, and the first end of the second oil supply channel is connected to the high-pressure area through the oil groove.

[0020] According to another aspect of the present application, a scroll compressor is provided, comprising a pump body oil supply structure, wherein the pump body oil supply structure is the above-mentioned pump body oil supply structure.

[0021] Preferably, the scroll compressor also includes a crankshaft oil circuit, an upper bracket oil circuit and an oil return passage. When a bearing and a first oil supply passage are provided on the moving plate and a second oil supply passage is provided on the stator, the oil flows back to the oil pool through the crankshaft oil circuit, the upper bracket oil circuit, the second oil supply passage, the high-pressure area, the first oil supply passage, the inner cavity of the bearing and the oil return passage in sequence.

[0022] Preferably, the scroll compressor also includes a crankshaft oil circuit, an upper bracket oil circuit and an oil return passage. When a bearing and a first oil supply passage are provided on the moving plate and a second oil supply passage is provided on the stationary plate, the oil flows back to the oil pool through the crankshaft oil circuit, the inner cavity of the bearing, the first oil supply passage, the high-pressure area, the second oil supply passage and the oil return passage in sequence.

[0023] The pump body oil supply structure provided in the present application includes a moving plate and a stationary plate. The end surface of the moving plate facing the stationary plate is provided with a protrusion protruding toward the stationary plate, and the end surface of the stationary plate facing the moving plate is provided with a recessed portion. The protrusion can be movably arranged in the recessed portion, and divides the recessed portion into a high-pressure area and a medium-pressure area isolated from each other. The high-pressure area is connected with the high-pressure oil chamber through an oil inlet channel. An oil storage chamber is provided on the recessed portion of the stationary plate, and the oil storage chamber is intermittently connected with the high-pressure area or the medium-pressure area. Oil is stored in the high-pressure area, and oil is supplied to the medium-pressure area. The oil supply structure of the pump body forms a high-pressure area and a medium-pressure area between the moving plate and the stationary plate, and the high-pressure area is always connected to the high-pressure oil chamber, continuously providing high-pressure oil to the high-pressure area, and the oil storage chamber can be intermittently connected to the high-pressure area or the medium-pressure area. When the oil storage chamber is connected to the high-pressure area, the high pressure in the high-pressure area can be used to fill the oil storage chamber with oil. When the oil storage chamber is connected to the medium-pressure area, the high-pressure oil stored in the oil storage chamber enters the medium-pressure area under the action of oil pressure and gravity, and replenishes the oil in the medium-pressure area. Since the volume of the oil storage chamber is constant, and the oil in the high-pressure area can only enter the medium-pressure area through the oil storage chamber, it is possible to ensure that the oil entering the medium-pressure area through the oil storage chamber is constant, thereby achieving stable oil supply to the pump body and precise control of the oil supply amount. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the high-pressure oil tank structure of the pump body oil supply structure of one embodiment of the present application;

[0025] Figure 2A schematic cross-sectional view of a moving disc of a pump body oil supply structure according to an embodiment of the present application;

[0026] Figure 3 This is a three-dimensional structural schematic diagram of a stator plate of a pump body oil supply structure according to an embodiment of the present application;

[0027] Figure 4 This is a diagram of the oil circuit structure of a scroll compressor according to one embodiment of the present application;

[0028] Figure 5 This is a diagram of the oil circuit structure of a scroll compressor according to one embodiment of the present application;

[0029] Figure 6 This is a diagram of the oil circuit structure of a scroll compressor according to an embodiment of the present application.

[0030] The reference numerals are:

[0031] 1. Moving plate; 2. Static plate; 3. High-pressure area; 4. Medium-pressure area; 5. Oil storage chamber; 6. Convex ring; 7. Annular groove; 8. Bearing; 9. First oil supply channel; 10. Second oil supply channel; 11. Oil groove; 12. Crankshaft oil circuit; 13. Upper bracket oil circuit; 14. Oil return passage. DETAILED DESCRIPTION

[0032] See also Figures 1 to 3 As shown, according to an embodiment of the present application, the oil supply structure of the pump body includes a moving plate 1 and a stationary plate 2, the end surface of the moving plate 1 facing the stationary plate 2 is provided with a protrusion protruding toward the stationary plate 2, and the end surface of the stationary plate 2 facing the moving plate 1 is provided with a recessed portion, the protrusion can be movably arranged in the recessed portion, and the recessed portion is divided into a high-pressure area 3 and a medium-pressure area 4 isolated from each other, the high-pressure area 3 is connected with the high-pressure oil chamber through an oil inlet channel, and an oil storage chamber 5 is provided on the recessed portion of the stationary plate 2, and the oil storage chamber 5 is intermittently connected with the high-pressure area 3 or the medium-pressure area 4, oil is stored in the high-pressure area 3, and oil is supplied to the medium-pressure area 4.

[0033] The oil supply structure of the pump body forms a high-pressure area 3 and a medium-pressure area 4 between the moving plate 1 and the stationary plate 2, and the high-pressure area 3 is always connected to the high-pressure oil chamber, and can continuously provide high-pressure oil to the high-pressure area 3 through the high-pressure oil chamber, and continuously supply oil to the high-pressure area 3, while the oil storage chamber 5 can be intermittently connected to the high-pressure area 3 or the medium-pressure area 4. When the oil storage chamber 5 is connected to the high-pressure area 3, the high pressure of the high-pressure area 3 can be used to fill the oil storage chamber 5 with oil. When the oil storage chamber 5 is connected to the medium-pressure area 4, the high-pressure oil stored in the oil storage chamber 5 enters the medium-pressure area 4 under the action of oil pressure and gravity, and replenishes the oil for the medium-pressure area 4. Since the volume of the oil storage chamber 5 is constant, and the oil in the high-pressure area 3 can only enter the medium-pressure area 4 through the oil storage chamber 5, it is possible to ensure that the oil supply entering the medium-pressure area 4 through the oil storage chamber 5 is constant, thereby achieving stable oil supply of the pump body and precise control of the oil supply amount.

[0034] In addition, during the orbital motion of the moving plate 1 relative to the stationary plate 2, the ranges of the high-pressure area 3 and the medium-pressure area 4 will constantly change, so that oil lubrication can be supplied to different areas of the contact surface of the moving plate 1 and the stationary plate 2, thereby achieving lubrication of the sliding surfaces of the moving plate 1 and the stationary plate 2 and supplying oil to the pump body.

[0035] In this embodiment, the high-pressure area 3 is a closed high-pressure oil tank, and the medium-pressure area 4 is a medium-pressure oil tank. The medium-pressure oil tank is connected to the back-pressure chamber. The oil in the high-pressure oil tank enters the medium-pressure oil tank through the oil storage chamber 5, and then enters the medium-pressure back-pressure chamber from the medium-pressure oil tank to supply oil to the back-pressure chamber.

[0036] See also Figure 1 As shown, it shows a schematic diagram of the high-pressure oil tank formed by the moving and static disks at a certain moment. It can be seen from the figure that during the revolution of the moving disk 1, the high-pressure oil tank intermittently covers the range of the oil storage chamber 5, wherein the connection relationship between the high-pressure oil tank and the oil storage chamber 5 is determined by the revolution position of the moving disk 1. After the oil storage chamber 5 enters the range of the high-pressure oil tank, the oil storage chamber 5 is filled with the oil in the high-pressure oil tank. Then, when the high-pressure oil tank leaves this range, under the action of the surface tension, oil pressure and gravity of the protruding part of the moving disk 1, the oil in the oil storage chamber 5 will fall into the medium-pressure back pressure chamber, thereby providing lubrication for the anti-rotation mechanism.

[0037] Since the moving plate 1 has a larger mating surface of the high-pressure oil groove, the oil attached to the surface of the moving plate 1 will also continuously enter the pump body as the moving plate revolves. Therefore, compared with other traditional compressors in which the oil in the back pressure chamber needs to meet the lubrication of the anti-self-rotation device and the technical solution of supplying oil to the medium-pressure oil groove and the pump body during the operation of the moving plate 1, the amount of oil provided by the oil storage chamber 5 of the pump body oil supply structure of the embodiment of the present application only needs to meet the lubrication of the anti-self-rotation mechanism, so the oil supply can be controlled more accurately.

[0038] The oil storage cavity 5 is, for example, an oil storage hole or an oil storage tank, and the cross-sectional shape of the oil storage hole or the oil storage tank is, for example, circular, triangular, rectangular, elliptical, etc. The overall structure of the oil storage hole or the oil storage tank can be cylindrical, truncated cone, prism, prism, cone, pyramid, etc.

[0039] In one embodiment, the pump body oil supply structure further includes an oil outlet channel, which is connected to the high-pressure area 3, and the oil entering the high-pressure area 3 from the oil inlet channel can flow out of the high-pressure area 3 through the oil outlet channel. By adding the oil outlet channel, the high-pressure oil tank formed by the high-pressure area 3 is connected to the oil inlet channel and the oil outlet channel respectively, and an oil circuit circulation can be formed, so that the oil can enter the high-pressure oil tank and flow out of the high-pressure oil tank, thereby ensuring the circulation of the oil and avoiding the problem of oil accumulation caused by the oil being accumulated in the high-pressure oil tank and unable to participate in the circulation in time.

[0040] In one embodiment, the protrusion is a protruding ring 6, the recess is an annular groove 7, the inner ring wall of the protruding ring 6 and the inner ring wall of the annular groove 7 form a high-pressure area 3, and the outer ring wall of the protruding ring 6 and the outer ring wall of the annular groove 7 form a medium-pressure area 4. Preferably, the protruding ring 6 is a circular ring with uniform wall thickness.

[0041] The high-pressure area 3 is a dynamic annular oil groove. During the revolution of the moving plate 1, the range of the high-pressure area 3 changes, but the total area of ​​the high-pressure area 3 remains unchanged. Since the high-pressure oil groove is always located on the surface of the moving plate 1, stable lubrication of the moving plate 1 and the stationary plate 2 can be achieved.

[0042] The dynamic annular high-pressure oil groove forms a high-pressure oil thrust ring with a constant area on the surface of the movable plate 1. According to the oil pressure principle, when the movable plate 1 overturns, the contact area between the pressed part and the oil becomes larger, the oil pressure increases, and it starts to lift up, and the contact area between the lifted part and the oil becomes smaller, the oil pressure decreases, and it starts to drop, so that the movable plate 1 can return to its normal position. That is, this structure will use the change in oil pressure to automatically correct the overturning tendency of the movable plate 1 during operation, so that the contact surface lubrication of the movable plate 1 and the static plate 2 can always be adequately maintained, thereby reducing the wear on the tooth top.

[0043] In one embodiment, the oil storage chamber 5 is arranged at the bottom of the recessed portion, and there are at least two oil storage chambers 5. At least two oil storage chambers 5 are arranged along the circumference of the stator plate 2. When the moving plate 1 revolves to different positions, lubricating oil can be provided to the back pressure chamber in a timely manner to ensure the oil supply frequency and achieve stable oil supply.

[0044] As a preferred embodiment, there are four oil storage chambers 5, and the four oil storage chambers 5 are evenly arranged along the circumference of the static plate 2. The oil supply frequency of the oil storage chamber 5 to the back pressure chamber can be reasonably adjusted through the four oil storage chambers 5, and the uniformity and stability of the oil supply frequency can be ensured through the setting positions of the four oil storage chambers 5. The reason for setting four oil storage chambers 5 is that for the moving plate 1, during the revolution, its movement is mainly composed of sliding in two directions perpendicular to each other, and there are four farthest sliding points in the two sliding directions, which can just correspond to the circumferential positions of the four oil storage chambers 5, so it can better match the revolution trajectory of the moving plate 1, making the overall structural design more reasonable.

[0045] In one embodiment, when the convex ring 6 moves to the oil storage chamber 5, the convex ring 6 can completely cover the oil storage chamber 5, thereby preventing the high-pressure oil grooves on both sides of the convex ring 6 from being connected to the medium-pressure oil grooves when the oil storage chamber 5 moves to the position of the convex ring 6, resulting in the phenomenon of high-pressure and low-pressure being connected. The stability and reliability of the pump body oil supply structure are effectively improved. Preferably, the radial thickness of the convex ring 6 is greater than the radial distance between the two farthest points of the oil storage chamber 5 in the radial direction, thereby effectively ensuring the sealing effect of the convex ring 6 on the oil storage chamber 5.

[0046] In one embodiment, the minimum distance between the oil storage chamber 5 and the outer ring wall of the annular groove 7 is greater than the thickness of the convex ring 6, thereby ensuring that when the convex ring 6 moves to the minimum position from the outer ring wall of the annular groove 7, the oil storage chamber 5 can be completely located inside the inner ring wall of the convex ring 6, and oil can be fully stored, thereby avoiding interference of the convex ring 6 with the oil storage chamber 5.

[0047] In one embodiment, the minimum distance between the oil storage chamber 5 and the inner ring wall of the annular groove 7 is greater than the thickness of the convex ring 6, thereby ensuring that when the convex ring 6 moves to the minimum position away from the inner ring wall of the annular groove 7, the oil storage chamber 5 can be completely located outside the outer ring wall of the convex ring 6, so that the oil stored in the oil storage chamber 5 can be fully released to the back pressure chamber, avoiding interference of the convex ring 6 with the oil storage chamber 5.

[0048] In one embodiment, when the preset point on the convex ring 6 moves to the farthest position from the inner ring wall of the annular groove 7, the oil storage chamber 5 located on the same radial direction as the preset point can be completely located in the high-pressure area 3, and when the preset point on the convex ring 6 moves to the closest position to the inner ring wall of the annular groove 7, the oil storage chamber 5 located on the same radial direction as the preset point can be completely located in the medium-pressure area 4, thereby ensuring that the setting position of the oil storage chamber 5 is accurate, and regular intermittent connection with the high-pressure area 3 and the medium-pressure area 4 can be achieved, thereby ensuring the stability and reliability of oil storage and oil discharge of the oil storage chamber 5.

[0049] In one embodiment, during the entire movement of the moving plate 1, the moving plate 1 does not collide with the inner annular wall or the outer annular wall of the annular groove 7, thereby effectively avoiding interference between the moving plate 1 and the stationary plate 2 during the orbital motion, thereby ensuring the safe and stable operation of the pump body oil supply structure.

[0050] In one embodiment, the compression chamber of the static plate 2 is not connected with the high-pressure area 3, so that the low-pressure oil in the compression chamber of the static plate 2 and the high-pressure oil in the high-pressure area 3 will not be connected, thereby avoiding the connection between the compression chamber of the static plate 2 and the high-pressure area 3, and improving the reliability of the moving plate 1 and the static plate 2 during movement.

[0051] In one embodiment, the movable plate 1 is provided with a bearing 8 and a first oil supply channel 9. The bearing 8 is provided on the back side of the movable plate 1 away from the static plate 2. The first end of the first oil supply channel 9 is connected to the high-pressure area 3, and the second end of the first oil supply channel 9 is connected to the inner cavity of the bearing 8. The high-pressure oil tank of the high-pressure area 3 is connected to the inner cavity of the bearing 8 of the movable plate 1 through the first oil supply channel 9. The first oil supply channel 9 can be used as both an oil inlet channel and an oil outlet channel. When used as an oil inlet channel, the high-pressure oil in the bearing 8 enters the high-pressure area 3 through the first oil supply channel 9 to provide high-pressure oil for the high-pressure area 3. When used as an oil outlet channel, the high-pressure oil in the high-pressure area 3 can enter the inner cavity of the bearing 8 through the first oil supply channel 9 to realize the circulation of the high-pressure oil in the high-pressure area 3.

[0052] The inner cavity of the bearing 8 is a high-pressure cavity, and the outer cavity of the bearing 8 is a medium-pressure cavity. The high-pressure cavity and the medium-pressure cavity are sealed and separated to avoid the high-pressure cavity and the medium-pressure cavity from being connected, so that the back-pressure cavity always remains a medium-pressure cavity.

[0053] In one embodiment, a second oil supply channel 10 is provided on the stator 2, and a first end of the second oil supply channel 10 is connected to the high pressure area 3, and a second end of the second oil supply channel 10 is provided on the outer peripheral side of the annular groove 7 and is spaced apart from the annular groove 7, so as to avoid the second end of the second oil supply channel 10 being directly connected to the high pressure oil groove. The second oil supply channel 10 can be used as both an oil inlet channel and an oil outlet channel. When used as an oil inlet channel, the high pressure oil in the compressor housing enters the high pressure area 3 through the second oil supply channel 10, and provides the high pressure oil for the high pressure area 3. When used as an oil outlet channel, the high pressure oil in the high pressure area 3 can flow out to the compressor housing through the second oil supply channel 10, and the circulation of the high pressure oil in the high pressure area 3 is realized.

[0054] The first end of the second oil supply channel 10 is arranged on the inner circumference of the annular groove 7, and an oil groove 11 is arranged on the end surface of the stator plate 2 located on the inner circumference of the annular groove 7. The first end of the second oil supply channel 10 is connected with the high-pressure area 3 through the oil groove 11. The setting of the oil groove 11 makes it more convenient to connect the second oil supply channel 10 with the annular groove 7.

[0055] Most traditional compressors supply oil from the bottom of the bearing 8 of the moving disk 1, bringing a small amount of oil to the medium-pressure chamber, and then entering the pump body under the stirring of the moving disk 1. Since the pressure of the medium-pressure chamber needs to be constant, the amount of oil entering the medium-pressure chamber is generally small relative to the oil in each bearing. However, the high-pressure oil tank used for the oil supply structure of the oil supply pump body in the present application can be used as a part of the oil circuit circulation, so a large amount of oil flows through, and the continuous change of the annular oil tank area can be used to achieve oil supply and lubrication of the pump body, and the oil storage chamber 5 can be used to achieve continuous and stable oil supply to the back pressure chamber. Therefore, the pump body oil supply structure of the present application can still achieve stable oil supply to the pump body without relying on the stirring of the moving disk 1 to supply oil, wasting power and increasing the oil circulation rate.

[0056] At the same time, since the high-pressure oil tank is relatively sealed, only a small amount of oil for lubrication of the anti-rotation mechanism will flow into the medium-pressure chamber. Compared with the compressor with an oil pool in the back-pressure chamber, the pump body oil supply structure of the present application reduces the amount of oil in contact with the refrigerant, which can effectively reduce the oil circulation rate, reduce the miscibility of the refrigerant and the oil, and improve the system performance.

[0057] The oil storage chamber 5 of the pump body oil supply structure of the present application is intermittently connected to the high-pressure oil tank during operation, during which the oil storage chamber 5 is filled with oil. After the high-pressure oil tank leaves the oil storage chamber 5, this part of the oil naturally falls into the anti-self-rotation mechanism for lubrication under the action of oil pressure, so that the oil brought out by each rotation of the compressor is quantitative and the oil supply is controllable. Since this part of the oil only needs to meet the lubrication of the anti-self-rotation mechanism, this part of the oil is less and the oil circulation rate is low.

[0058] The pump body oil supply structure of the present application stores sufficient high-pressure oil on the end faces of the movable and static plates. During the revolution of the movable plate 1, the revolution of the movable plate 1 will bring sufficient and stable lubricating oil into the meshing part of the movable and static plate profiles, without the need to introduce a medium-pressure oil tank like a traditional compressor.

[0059] The high-pressure oil groove of the pump body oil supply structure of the present application can play a role similar to that of a sliding bearing, that is, in the rapidly rotating lubricating oil, the oil pressure is high in narrow places and low in wide places. When the moving plate 1 tends to overturn, the height of the high-pressure oil groove on one side will inevitably become lower due to the overturning, and the height of the other side will become higher, which will form a torque to suppress the overturning of the moving plate 1, thereby reducing the wear of the moving plate 1 caused by the overturning and improving reliability.

[0060] See also Figures 4 to 6 As shown, according to an embodiment of the present application, the scroll compressor includes a pump body oil supply structure, and the pump body oil supply structure is the above-mentioned pump body oil supply structure.

[0061] See also Figure 4As shown, in one embodiment, the scroll compressor also includes a crankshaft oil circuit 12, an upper bracket oil circuit 13 and an oil return passage 14. When a bearing 8 and a first oil supply passage 9 are provided on the moving plate 1, and a second oil supply passage 10 is provided on the stator plate 2, the oil flows back to the oil pool through the crankshaft oil circuit 12, the upper bracket oil circuit 13, the second oil supply passage 10, the high-pressure area 3, the first oil supply passage 9, the inner cavity of the bearing 8 and the oil return passage 14 in sequence.

[0062] For this embodiment, during the compression process, the oil is pumped from the oil pump into the crankshaft oil circuit 12, and then injected into the oil circuit outlet on the main journal along the crankshaft oil circuit 12. The main journal is provided with a cutting edge, and an oil storage ring is provided on the upper bracket corresponding to the cutting edge. The oil storage ring can store oil, so it can form a buffer space when the oil pressure is too large to effectively buffer the oil. The upper bracket is provided with an upper bracket oil circuit 13. After the oil is stored and lubricated in the main bearing, it is introduced into the second oil supply channel 10 along the upper bracket oil circuit 13, and enters the high-pressure oil tank of the high-pressure area 3 along the second oil supply channel 10, and then flows out from the first oil supply channel 9, enters the inner cavity of the bearing 8, provides high-pressure oil for the inner cavity of the bearing 8, and uses the high-pressure oil to lubricate the bearing 8. After that, the high-pressure oil flows out from the inner cavity of the bearing 8 and flows back to the oil pool through the oil return passage 14 to realize the oil circuit circulation. In this process, the second oil supply passage 10 serves as an oil inlet passage of the high-pressure oil tank, and the first oil supply passage 9 serves as an oil outlet passage of the high-pressure oil tank.

[0063] See also Figure 5 As shown, in one embodiment, the scroll compressor also includes a crankshaft oil circuit 12, an upper bracket oil circuit 13 and an oil return passage 14. When a bearing 8 and a first oil supply passage 9 are provided on the moving plate 1, and a second oil supply passage 10 is provided on the stator plate 2, the oil flows back to the oil pool through the crankshaft oil circuit 12, the inner cavity of the bearing 8, the first oil supply passage 9, the high-pressure area 3, the second oil supply passage 10 and the oil return passage 14 in sequence.

[0064] For this embodiment, during the compression process, the oil is first led out from the bottom of the crankshaft to the inner cavity of the bearing 8 of the moving plate 1, and then enters the high-pressure oil tank along the first oil supply channel 9, and then flows out from the second oil supply channel 10 through the high-pressure oil tank, and is led back to the upper bracket, and finally directly led back to the bottom oil pool by the oil return passage 14 on the upper bracket, so as to realize the oil circuit circulation. In this process, the first oil supply channel 9 serves as the oil inlet channel of the high-pressure oil tank, and the second oil supply channel 10 serves as the oil outlet channel of the high-pressure oil tank. In this embodiment, the oil circuit structure is simpler, and there is no need to open an upper bracket oil circuit on the upper bracket, so the number of parts can be reduced, the number of holes in the upper bracket can be reduced, and the processing cost can be reduced.

[0065] See also Figure 6As shown, in this embodiment, the high-pressure oil tank is only connected to the oil inlet channel, and no oil outlet channel is provided, so the high-pressure oil will be stored in the high-pressure oil tank. In this case, the oil in the high-pressure oil tank only plays a role in enhancing lubrication and preventing overturning, and does not form an oil circuit circulation.

[0066] 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.

[0067] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above are only preferred implementations of the present application. 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 application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. A pump body oil supply structure, characterized in that: The invention comprises a moving disc (1) and a stationary disc (2), wherein the moving disc (1) is provided with a protruding portion protruding toward the stationary disc (2) on its end surface facing the stationary disc (2), and the stationary disc (2) is provided with a recessed portion on its end surface facing the moving disc (1), wherein the protruding portion can be movably arranged in the recessed portion and divides the recessed portion into a high-pressure area (3) and a medium-pressure area (4) which are isolated from each other, wherein the high-pressure area (3) is connected to a high-pressure oil chamber through an oil inlet passage, and an oil storage chamber (5) is provided on the recessed portion of the stationary disc (2), wherein the oil storage chamber (5) is intermittently connected to the high-pressure area (3) or the medium-pressure area (4), stores oil in the high-pressure area (3) and supplies oil to the medium-pressure area (4), wherein the high-pressure area (3) is a high-pressure oil tank and the medium-pressure area (4) is a medium-pressure oil tank.

2. The pump body oil supply structure according to claim 1, characterized in that: The pump body oil supply structure also includes an oil outlet channel, the oil outlet channel is in communication with the high-pressure area (3), and the oil entering the high-pressure area (3) from the oil inlet channel can flow out of the high-pressure area (3) via the oil outlet channel.

3. The pump body oil supply structure according to claim 1, characterized in that: The protruding portion is a protruding ring (6), the recessed portion is an annular groove (7), the inner annular wall of the protruding ring (6) and the inner annular wall of the annular groove (7) enclose the high-pressure area (3), and the outer annular wall of the protruding ring (6) and the outer annular wall of the annular groove (7) enclose the medium-pressure area (4).

4. The pump body oil supply structure according to claim 3, characterized in that: The high-pressure region (3) is a dynamic annular oil groove. During the revolution of the moving disc (1), the range of the high-pressure region (3) changes, but the total area of ​​the high-pressure region (3) remains unchanged.

5. The pump body oil supply structure according to claim 1, characterized in that: The oil storage cavity (5) is arranged at the bottom of the recessed portion, there are at least two oil storage cavities (5), and at least two of the oil storage cavities (5) are arranged along the circumference of the stator (2).

6. The pump body oil supply structure according to claim 5, characterized in that: There are four oil storage chambers (5), and the four oil storage chambers (5) are evenly arranged along the circumference of the stator plate (2).

7. The pump body oil supply structure according to claim 3, characterized in that: When the convex ring (6) moves to the oil storage chamber (5), the convex ring (6) can completely cover the oil storage chamber (5).

8. The pump body oil supply structure according to claim 3, characterized in that: The minimum distance between the oil storage cavity (5) and the outer annular wall of the annular groove (7) is greater than the thickness of the convex ring (6); and / or the minimum distance between the oil storage cavity (5) and the inner annular wall of the annular groove (7) is greater than the thickness of the convex ring (6).

9. The pump body oil supply structure according to claim 3, characterized in that: When the preset point on the convex ring (6) moves to the position farthest from the inner ring wall of the annular groove (7), the oil storage cavity (5) located on the same radial direction as the preset point can be completely located in the high-pressure area (3); when the preset point on the convex ring (6) moves to the position closest to the inner ring wall of the annular groove (7), the oil storage cavity (5) located on the same radial direction as the preset point can be completely located in the medium-pressure area (4).

10. The pump body oil supply structure according to claim 3, characterized in that: During the entire movement process of the moving disc (1), the moving disc (1) does not collide with the inner annular wall or the outer annular wall of the annular groove (7).

11. The pump body oil supply structure according to claim 1, characterized in that: The compression chamber of the static disk (2) is not connected to the high-pressure area (3).

12. The pump body oil supply structure according to claim 1, characterized in that: The pump body oil supply structure further comprises an oil outlet channel, the oil outlet channel being in communication with the high-pressure region (3), and the oil entering the high-pressure region (3) from the oil inlet channel can flow out of the high-pressure region (3) via the oil outlet channel; The movable plate (1) is provided with a bearing (8) and a first oil supply channel (9); the bearing (8) is provided on the back side of the movable plate (1) away from the stationary plate (2); a first end of the first oil supply channel (9) is communicated with the high-pressure area (3); and a second end of the first oil supply channel (9) is communicated with an inner cavity of the bearing (8); Wherein, the first oil supply channel (9) is the oil inlet channel or the oil outlet channel.

13. The pump body oil supply structure according to claim 3, characterized in that: The pump body oil supply structure further comprises an oil outlet channel, the oil outlet channel being in communication with the high-pressure region (3), and the oil entering the high-pressure region (3) from the oil inlet channel can flow out of the high-pressure region (3) via the oil outlet channel; The stator plate (2) is provided with a second oil supply passage (10), a first end of the second oil supply passage (10) being in communication with the high pressure region (3), and a second end of the second oil supply passage (10) being provided on the outer peripheral side of the annular groove (7) and spaced apart from the annular groove (7); Wherein, the second oil supply channel (10) is the oil inlet channel or the oil outlet channel.

14. The pump body oil supply structure according to claim 13, characterized in that: The first end of the second oil supply passage (10) is arranged on the inner circumference side of the annular groove (7), and the stator (2) is provided with an oil groove (11) on the end surface of the inner circumference side of the annular groove (7), and the first end of the second oil supply passage (10) is connected to the high-pressure area (3) through the oil groove (11).

15. A scroll compressor, comprising a pump body oil supply structure, characterized in that: The pump body oil supply structure is the pump body oil supply structure according to any one of claims 1 to 14.

16. The scroll compressor according to claim 15, characterized in that: The scroll compressor further comprises a crankshaft oil circuit (12), an upper bracket oil circuit (13) and an oil return passage (14); when a bearing (8) and a first oil supply passage (9) are provided on the moving plate (1), a second oil supply passage (10) is provided on the stationary plate (2), and the pump body oil supply structure further comprises an oil outlet passage, the oil flows back to the oil pool in sequence through the crankshaft oil circuit (12), the upper bracket oil circuit (13), the second oil supply passage (10), the high-pressure area (3), the first oil supply passage (9), the inner cavity of the bearing (8) and the oil return passage (14); wherein the first oil supply passage (9) is an oil outlet passage, and the second oil supply passage (10) is an oil inlet passage.

17. The scroll compressor according to claim 15, characterized in that: The scroll compressor further comprises a crankshaft oil circuit (12) and an oil return passage (14). When a bearing (8) and a first oil supply passage (9) are provided on the moving plate (1), a second oil supply passage (10) is provided on the stationary plate (2), and the pump body oil supply structure further comprises an oil outlet passage, the oil flows back to the oil pool in sequence through the crankshaft oil circuit (12), the inner cavity of the bearing (8), the first oil supply passage (9), the high-pressure area (3), the second oil supply passage (10) and the oil return passage (14); wherein the first oil supply passage (9) is an oil inlet passage, and the second oil supply passage (10) is an oil outlet passage.

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