CN113202757B - Pump body oil supply structure and scroll compressor - Google Patents

Abstract

The application provides a pump body oil supply structure and a scroll compressor. This pump body oil feed structure includes movable disk (1) and quiet dish (2), movable disk (1) are provided with towards the convex bulge of quiet dish (2) towards the terminal surface of quiet dish (2), the terminal surface of quiet dish (2) towards movable disk (1) is provided with the depressed part, the bulge can the activity set up in the depressed part, and become high-pressure region (3) and medium-pressure region (4) of mutual isolation with the depressed part, high-pressure region (3) are through advance oil channel and high-pressure oil chamber intercommunication, be provided with oil storage chamber (5) on the depressed part of quiet dish (2), oil storage chamber (5) intermittent type ground and high-pressure region (3) or medium-pressure region (4) intercommunication, carry out the oil storage in high-pressure region (3), and supply oil to medium-pressure region (4). According to the pump body oil supply structure, the medium-pressure cavity can be stably supplied with oil, and the accurate control of oil supply quantity is realized.

Description

Pump body oil supply structure and scroll compressor

Technical Field

The application relates to the technical field of compressors, in particular to a pump oil supply structure and a scroll compressor.

Background

In scroll compressors, pump oil supply has been a central problem in compressor technology. In the vortex compression process, the meshing of the profile of the movable and static plates, the meshing of the tooth tops and the tooth bottoms of the movable and static plates and the relative sliding of the end faces of the movable and static plates can lead to the abrasion and even rejection of the compressor if oil supply is insufficient on any one of the matching faces. Therefore, the oil supply structure, especially the design of the pump body oil supply structure is very important for the compressor, and an excellent oil supply structure can ensure enough oil supply of the pump body under various working conditions, does not wear, and reduces energy consumption caused by oil supply as much as possible. In addition, the oil circulation rate is also a problem that must be considered when designing the oil circuit, namely if the oil supply mode of the oil supply structure makes too much refrigerant and oil mutually dissolve and discharge the oil out of the compressor, the oil shortage of the compressor can occur, and the oil carrying rate of the whole air conditioning system is too large, so that the oil supply rate is simply increased infinitely for reliability, and the positive effect is not necessarily obtained.

There are many options for lubrication of the pump body of the scroll compressor, and the back pressure chamber of the movable disc is usually divided into a high pressure chamber inside the movable disc bearing and a medium pressure chamber outside the movable disc bearing by a sealing ring on the back surface of the movable disc and on the outer side of the movable disc bearing. Therefore, the medium-pressure cavity usually comprises an anti-rotation mechanism which needs to be lubricated, and the oil stirred to the surface of the static disc is also brought into the medium-pressure oil groove under the revolution of the movable disc, and then enters the pump body. Normally, the oil entering the medium-pressure cavity cannot return to the bottom oil pool through the oil return mechanism and can only leave the pump body along with exhaust, so that the oil supply quantity is overlarge, the oil circulation rate is high, the oil supply quantity is small, and the anti-rotation mechanism and the pump body are worn. Therefore, a stable oil supply amount is often required in design, however, an oil supply structure capable of stably supplying oil to the medium pressure chamber is not known in the prior art.

Disclosure of Invention

Therefore, the technical problem to be solved by the application is to provide the pump body oil supply structure and the scroll compressor, which can stably supply oil to the medium-pressure cavity and realize accurate control of oil supply.

In order to solve the problems, the application provides a pump body oil supply structure, which comprises a movable disc and a static disc, wherein the end surface of the movable disc, which faces the static disc, is provided with a protruding part protruding towards the static disc, the end surface of the static disc, which faces the movable disc, is provided with a concave part, the protruding part can be movably arranged in the concave part, the concave part is divided into a high-pressure area and a medium-pressure area which are mutually isolated, the high-pressure area is communicated with a high-pressure oil cavity through an oil inlet channel, the concave part of the static disc is provided with an oil storage cavity, the oil storage cavity is communicated with the high-pressure area or the medium-pressure area in a clearance way, oil is stored in the high-pressure area, and oil is supplied to the medium-pressure area.

Preferably, the pump body oil supply structure further comprises an oil outlet channel, the oil outlet channel is communicated with the high-pressure area, and oil entering the high-pressure area from the oil inlet channel can flow out of the high-pressure area through the oil outlet channel.

Preferably, the convex part is a convex ring, the concave part is an annular groove, the inner annular wall of the convex ring and the inner annular wall of the annular groove enclose a high-pressure area, and the outer annular wall of the convex ring and the outer annular wall of the annular groove enclose a medium-pressure area.

Preferably, the high-pressure area is a dynamic annular oil groove, and the range of the high-pressure area is changed in the revolution process of the movable disc, so that the total area of the high-pressure area is unchanged.

Preferably, the oil storage cavities are arranged at the bottom of the concave part, at least two oil storage cavities are arranged along the circumference of the static disc.

Preferably, the number of the oil storage cavities is four, and the four oil storage cavities are uniformly distributed along the circumferential direction of the static disc.

Preferably, the collar is able to fully cover Chu Youqiang when moved to the oil storage chamber.

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.

Preferably, when the preset point on the convex ring moves to the farthest position from the inner annular wall of the annular groove, the oil storage cavity which is positioned on the same radial direction with the preset point can be completely positioned in the high-pressure area, and when the preset point on the convex ring moves to the nearest position from the inner annular wall of the annular groove, the oil storage cavity which is positioned on the same radial direction with the preset point can be completely positioned in the medium-pressure area.

Preferably, the movable disk does not collide with the inner or outer annular wall of the annular groove throughout the movement of the movable disk.

Preferably, the compression chamber of the stationary plate is not in communication with the high pressure region.

Preferably, the movable disc is provided with a bearing and a first oil supply channel, the bearing is arranged on the back side of the movable disc, which is far away from the static disc, the first end of the first oil supply channel is communicated with the high-pressure area, and the second end of the first oil supply channel is communicated with the inner cavity of the bearing.

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

Preferably, the stationary plate is provided with a second oil supply passage, a first end of which communicates with the high pressure region, and a second end of which is provided at an outer peripheral side of the annular groove and spaced apart from the annular groove.

Preferably, the first end of the second oil supply channel is arranged on the inner peripheral side of the annular groove, the end face of the static disc, which is positioned on the inner peripheral side of the annular groove, is provided with an oil through groove, and the first end of the second oil supply channel is communicated with the high-pressure area through the oil through groove.

According to another aspect of the present application, there is provided a scroll compressor including a pump body oil supply structure as described above.

Preferably, the scroll compressor further comprises a crankshaft oil way, an upper bracket oil way and an oil return passage, when the movable disc is provided with a bearing and a first oil supply channel, and the fixed disc is provided with a second oil supply channel, oil flows back to the oil tank through the crankshaft oil way, the upper bracket oil way, the second oil supply channel, the high-pressure area, the first oil supply channel, the inner cavity of the bearing and the oil return passage in sequence.

Preferably, the scroll compressor further comprises a crankshaft oil way, an upper bracket oil way and an oil return passage, when the movable disc is provided with a bearing and a first oil supply channel, and the fixed disc is provided with a second oil supply channel, oil flows back to the oil tank through the crankshaft oil way, the inner cavity of the bearing, the first oil supply channel, the high-pressure area, the second oil supply channel and the oil return passage in sequence.

The application provides a pump body oil supply structure, which comprises a movable disc and a static disc, wherein the end surface of the movable disc, which faces the static disc, is provided with a protruding part protruding towards the static disc, the end surface of the static disc, which faces the movable disc, is provided with a concave part, the protruding part can be movably arranged in the concave part, the concave part is divided into a high-pressure area and a medium-pressure area which are mutually isolated, the high-pressure area is communicated with a high-pressure oil cavity through an oil inlet channel, the concave part of the static disc is provided with an oil storage cavity, the oil storage cavity is communicated with the high-pressure area or the medium-pressure area in a clearance way, oil is stored in the high-pressure area, and oil is supplied to the medium-pressure area. The pump body oil supply structure forms a high-pressure area and a medium-pressure area between the movable disc and the static disc, the high-pressure area is always communicated with the high-pressure oil cavity, high-pressure oil is continuously supplied to the high-pressure area, the oil storage cavity can be intermittently communicated with the high-pressure area or the medium-pressure area, when the oil storage cavity is communicated with the high-pressure area, the high-pressure oil in the high-pressure area is utilized to fill the oil storage cavity, when the oil storage cavity is communicated with the medium-pressure area, the high-pressure oil stored in the oil storage cavity enters the medium-pressure area under the action of oil pressure and gravity, the medium-pressure area is supplemented with oil, and because the volume of the oil storage cavity is constant, the oil in the high-pressure area can only enter the medium-pressure area through the oil storage cavity, so that the oil entering the medium-pressure area through the oil storage cavity is constant can be ensured, stable oil supply of the pump body is realized, and accurate control of oil supply is realized.

Drawings

FIG. 1 is a schematic view of a high-pressure oil tank of a pump body oil supply structure according to an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of a movable disk of a pump body oil supply structure according to an embodiment of the present application;

FIG. 3 is a schematic perspective view of a static disc of a pump body oil supply structure according to an embodiment of the present application;

FIG. 4 is a diagram illustrating an oil path structure of a scroll compressor according to an embodiment of the present application;

fig. 5 is a view showing an oil path structure of a scroll compressor according to an embodiment of the present application;

fig. 6 is a view showing an oil path structure of a scroll compressor according to an embodiment of the present application.

The reference numerals are expressed as:

1. A movable plate; 2, a static disc, 3, a high-pressure area, 4, a medium-pressure area, 5, an oil storage cavity, 6, a convex ring, 7, an annular groove, 8, a bearing, 9, a first oil supply channel, 10, a second oil supply channel, 11, an oil through groove, 12, a crankshaft oil way, 13, an upper bracket oil way, 14 and an oil return passage.

Detailed Description

Referring to fig. 1 to 3 in combination, according to an embodiment of the present application, a pump body oil supply structure includes a movable plate 1 and a stationary plate 2, an end surface of the movable plate 1 facing the stationary plate 2 is provided with a protrusion protruding toward the stationary plate 2, an end surface of the stationary plate 2 facing the movable plate 1 is provided with a recess, the protrusion is movably disposed in the recess and divides the recess into a high pressure area 3 and a medium pressure area 4 isolated from each other, the high pressure area 3 is communicated with a high pressure oil chamber through an oil inlet passage, an oil storage chamber 5 is provided on the recess of the stationary plate 2, the oil storage chamber 5 is intermittently communicated 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.

According to the pump body oil supply structure, the high-pressure area 3 and the medium-pressure area 4 are formed between the movable disc 1 and the static disc 2, the high-pressure area 3 is always communicated with the high-pressure oil cavity, high-pressure oil can be continuously supplied to the high-pressure area 3 through the high-pressure oil cavity, the high-pressure area 3 is continuously supplied with oil, the oil storage cavity 5 can be intermittently communicated with the high-pressure area 3 or the medium-pressure area 4, when the oil storage cavity 5 is communicated with the high-pressure area 3, the oil can be filled into the oil storage cavity 5 by utilizing the high-pressure of the high-pressure area 3, when the oil storage cavity 5 is communicated with the medium-pressure area 4, the high-pressure oil stored in the oil storage cavity 5 enters the medium-pressure area 4 under the action of oil pressure and gravity, the medium-pressure area 4 is supplemented with the oil, and the oil in the high-pressure area 3 can only enter the medium-pressure area 4 through the oil storage cavity 5 due to the constant volume of the oil storage cavity 5, so that the oil supply quantity of the oil entering the medium-pressure area 4 through the oil storage cavity 5 can be ensured to be constant, the stable oil supply of the pump body can be realized, and accurate control of the oil supply can be realized.

In addition, in the process of revolution motion of the movable disc 1 relative to the fixed disc 2, the ranges of the high-pressure area 3 and the medium-pressure area 4 can be changed continuously, so that oil supply lubrication can be carried out on different areas of the contact surface of the movable disc 1 and the fixed disc 2, sliding surface lubrication of the movable disc 1 and the fixed disc 2 is realized, and oil supply to a pump body is realized.

In this embodiment, the high-pressure area 3 is a closed high-pressure oil groove, the medium-pressure area 4 is a medium-pressure oil groove, the medium-pressure oil groove is communicated with the back pressure cavity, oil in the high-pressure oil groove enters the medium-pressure oil groove through the oil storage cavity 5, and then enters the medium-pressure back pressure cavity from the medium-pressure oil groove to supply oil in the back pressure cavity.

Referring to FIG. 1 in combination, a schematic diagram of a high pressure oil sump formed by a dynamic and static disk at a certain point in time is shown. As can be seen from the figure, the high-pressure oil groove intermittently covers the range of the oil reservoir 5 during the revolution of the movable disk 1, wherein the communication relationship between the high-pressure oil groove and the oil reservoir 5 is determined by the revolution position of the movable disk 1. After the oil storage cavity 5 enters the range of the high-pressure oil groove, the oil storage cavity 5 is filled with oil in the high-pressure oil groove, and then when the high-pressure oil groove leaves the range, the oil in the oil storage cavity 5 can fall into the medium-pressure back pressure cavity under the action of the surface tension, the oil pressure and the gravity of the protruding part of the movable disc 1, so that lubrication is provided for the anti-rotation mechanism.

Because the movable disk 1 has a larger high-pressure oil groove matching surface, oil attached to the surface of the movable disk 1 can also continuously enter the pump body along with the revolution of the movable disk. Therefore, compared with the technical scheme that oil in a back pressure cavity of other traditional compressors is required to not only meet the lubrication of the anti-rotation device, but also supply oil to a medium-pressure oil groove and the inside of a pump body in the operation of the movable disc 1, the oil quantity provided by the oil storage cavity 5 of the pump body oil supply structure of the embodiment of the application only needs to meet the lubrication of the anti-rotation mechanism, so that the oil quantity can be controlled more accurately.

The oil storage chamber 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, or the like. The whole structure of the oil storage hole or the oil storage tank can be cylindrical, round platform, prismatic, conical, prismatic and the like.

In one embodiment, the pump body oil supply structure further includes an oil outlet passage that communicates with the high pressure region 3, and oil that enters the high pressure region 3 from the oil inlet passage can flow out of the high pressure region 3 via the oil outlet passage. Through increasing the oil outlet channel for the high-pressure oil tank that high-pressure region 3 formed communicates in oil inlet channel and oil outlet channel respectively, can form the oil circuit circulation, makes fluid can get into the high-pressure oil tank and follow high-pressure oil tank outflow, has guaranteed the circulation of fluid, has avoided the fluid backlog unable timely the fluid accumulation problem that the circulation leads to of participating in the high-pressure oil tank.

In one embodiment, 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 a 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 a medium pressure area 4. Preferably, the convex ring 6 is a circular ring shape with uniform wall thickness.

The high-pressure area 3 is a dynamic annular oil groove, the range of the high-pressure area 3 changes in the revolution process of the movable disc 1, and the total area of the high-pressure area 3 is unchanged, and the high-pressure oil groove is always positioned on the surface of the movable disc 1, so that stable lubrication can be realized on the movable disc 1 and the static disc 2.

The dynamic annular high-pressure oil groove enables the surface of the movable disc 1 to form a high-pressure oil thrust ring with a constant area, when the movable disc 1 is overturned according to the oil pressure principle, the contact area between the pressed part and oil liquid is increased, the oil pressure is increased, the lifted part and the oil liquid are started to be lifted, the contact area between the lifted part and the oil liquid is reduced, the oil pressure is reduced, the movable disc 1 can return to a normal position, namely, the structure can automatically correct the overturning trend of the movable disc 1 in operation by utilizing the change of the oil pressure, so that the lubrication of the contact surface of the movable disc 1 and the fixed disc 2 can be kept sufficient all the time, and the abrasion of tooth tops is reduced.

In one embodiment, the oil storage cavities 5 are arranged at the bottom of the concave part, at least two oil storage cavities 5 are arranged along the circumference of the static disc 2, and can timely provide lubricating oil for the back pressure cavity when the dynamic disc 1 revolves to different positions, so that the oil supply frequency is ensured, and stable oil supply is realized.

As a preferred embodiment, the number of the oil storage cavities 5 is four, the four oil storage cavities 5 are uniformly distributed along the circumferential direction of the static disc 2, the oil supply frequency of the back pressure cavity by the oil storage cavities 5 can be reasonably adjusted through the four oil storage cavities 5, and the uniform and stable oil supply frequency is ensured through the setting positions of the four oil storage cavities 5. The four oil storage cavities 5 are arranged, and the motion of the movable disk 1 is mainly formed by sliding combination in two mutually perpendicular directions in the revolution process, and four farthest sliding points are shared in the two sliding directions, so that the four oil storage cavities 5 can just correspond to the circumferential positions of the four oil storage cavities, and the movable disk can be more matched with the revolution track of the movable disk 1, so that the overall structural design is more reasonable.

In one embodiment, when the convex ring 6 moves to the oil storage cavity 5, the convex ring 6 can fully cover the oil storage cavity 5, so that the phenomenon that high-pressure oil grooves on two sides of the convex ring 6 are communicated with medium-pressure oil grooves when the oil storage cavity 5 moves to the position of the convex ring 6, and high-pressure and low-pressure communication is caused can be avoided. The stability and the reliability of the pump body oil supply structure are effectively improved. Preferably, the radial thickness of the collar 6 is greater than the radial distance of the two furthest points of the oil reservoir 5 in the radial direction, so that the sealing effect of the collar 6 on the oil reservoir 5 is effectively ensured.

In one embodiment, the minimum distance between the oil storage cavity 5 and the outer annular wall of the annular groove 7 is larger than the thickness of the convex ring 6, so that when the convex ring 6 moves to the minimum position away from the outer annular wall of the annular groove 7, the oil storage cavity 5 can be completely located on the inner side of the inner annular wall of the convex ring 6, oil storage can be fully performed, and interference of the convex ring 6 to the oil storage cavity 5 is avoided.

In one embodiment, the minimum distance between the oil storage cavity 5 and the inner annular wall of the annular groove 7 is larger than the thickness of the convex ring 6, so that when the convex ring 6 moves to the minimum position away from the inner annular wall of the annular groove 7, the oil storage cavity 5 can be completely located outside the outer annular wall of the convex ring 6, so that oil stored in the oil storage cavity 5 can be fully released to the back pressure cavity, and interference of the convex ring 6 to the oil storage cavity 5 is avoided.

In one embodiment, when the preset point on the convex ring 6 moves to the farthest position from the inner annular wall of the annular groove 7, the oil storage cavity 5 located in the same radial direction with 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 nearest position from the inner annular wall of the annular groove 7, the oil storage cavity 5 located in the same radial direction with the preset point can be completely located in the middle-pressure area 4, so that the accurate setting position of the oil storage cavity 5 is ensured, the regular intermittent communication with the high-pressure area 3 and the middle-pressure area 4 can be realized, and the stability and reliability of oil storage and oil discharge of the oil storage cavity 5 are ensured.

In one embodiment, in the whole movement process of the movable disc 1, the movable disc 1 does not collide with the inner annular wall or the outer annular wall of the annular groove 7, so that interference between the movable disc 1 and the stationary disc 2 in revolution movement can be effectively avoided, and safe and stable operation of the pump body oil supply structure is ensured.

In one embodiment, the compression cavity of the static disc 2 is not communicated with the high-pressure area 3, so that low-pressure oil in the compression cavity of the static disc 2 is not communicated with high-pressure oil in the high-pressure area 3, the phenomenon of crosstalk between the compression cavity of the static disc 2 and the high-pressure area 3 is avoided, and the reliability in the moving process of the movable disc 1 and the static disc 2 is improved.

In one embodiment, the movable disc 1 is provided with a bearing 8 and a first oil supply channel 9, the bearing 8 is arranged on the back side of the movable disc 1 away from the static disc 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. The high-pressure oil tank of the high-pressure area 3 is communicated with the inner cavity of the bearing 8 of the movable disk 1 through the first oil supply channel 9, the first oil supply channel 9 can be used as an oil inlet channel and an oil outlet channel, when the high-pressure oil in the bearing 8 enters the high-pressure area 3 through the first oil supply channel 9, high-pressure oil is provided for the high-pressure area 3, and when the high-pressure oil is used as the 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, so that the circulating flow of the high-pressure oil in the high-pressure area 3 is realized.

The inner cavity of the bearing 8 is a high-pressure cavity, the outer part of the bearing 8 is a medium-pressure cavity, and the high-pressure cavity and the medium-pressure cavity are sealed and separated, so that the communication between the high-pressure cavity and the medium-pressure cavity is avoided, and the back pressure cavity is always kept as the medium-pressure cavity.

In one embodiment, the stationary plate 2 is provided with a second oil supply passage 10, a first end of the second oil supply passage 10 communicates with the high pressure region 3, and a second end of the second oil supply passage 10 is provided at an outer circumferential side of the annular groove 7 and spaced apart from the annular groove 7, thereby avoiding the second end of the second oil supply passage 10 from directly communicating with the high pressure oil tank. The second oil supply channel 10 can be used as an oil inlet channel and an oil outlet channel, when the second oil supply channel 10 is used as the oil inlet channel, high-pressure oil liquid in the compressor shell enters the high-pressure area 3 to provide high-pressure oil liquid for the high-pressure area 3, and when the second oil supply channel is used as the oil outlet channel, the high-pressure oil liquid in the high-pressure area 3 can flow out to the compressor shell through the second oil supply channel 10 to realize the circulation flow of the high-pressure oil liquid in the high-pressure area 3.

The first end of second oil supply channel 10 sets up in the inner periphery side of annular groove 7, and quiet dish 2 is provided with logical oil groove 11 on the terminal surface of annular groove 7 inner periphery side, and the first end of second oil supply channel 10 communicates with high-pressure region 3 through logical oil groove 11, leads to the setting of oil groove 11, more conveniently realizes the intercommunication of second oil supply channel 10 and annular groove 7.

The traditional compressor is mainly supplied with oil from the bottom of the bearing 8 of the driven disc 1, a small amount of oil is brought into the medium-pressure cavity, and then enters the pump body under the stirring of the driven disc 1. Since the pressure in the medium pressure chamber needs to be constant, the amount of oil that typically enters the medium pressure chamber is small relative to the oil in each bearing. However, the high-pressure oil groove used for the oil supply structure of the oil supply pump body can be used as a part of oil circuit circulation, so that a large amount of oil flows, the oil supply lubrication of the pump body can be realized by utilizing the continuous change of the annular oil groove area, and the continuous stable oil supply of the back pressure cavity is realized by utilizing the oil storage cavity 5.

Meanwhile, because the high-pressure oil groove is relatively sealed, only a small amount of oil quantity for lubricating the anti-rotation mechanism flows into the medium-pressure cavity, and compared with a compressor with an oil pool arranged in the back pressure cavity, the pump body oil supply structure reduces the oil quantity contacted with the refrigerant, can effectively reduce the oil circulation rate, reduces the mutual dissolution of the refrigerant and the oil, and improves the system performance.

The oil reservoir 5 of the pump body oil supply structure of the present application is intermittently in communication with the high-pressure oil tank during operation, during which the oil reservoir 5 is filled with oil. After the high-pressure oil tank leaves the range of the oil storage cavity 5, the oil naturally falls into the anti-rotation mechanism for lubrication under the action of oil pressure, so that the oil carried out by each rotation of the compressor is quantitative, and the oil supply is controllable. Because the part of oil only needs to meet the lubrication of the anti-rotation mechanism, the part of oil is less, and the oil circulation rate is lower.

The pump body oil supply structure stores enough high-pressure oil on the end surfaces of the movable disc and the fixed disc, so that enough and stable lubricating oil can be brought into the line engagement part of the movable disc and the fixed disc by the revolution of the movable disc 1, and the medium-pressure oil groove is not required to be introduced like a traditional compressor.

The high-pressure oil groove of the pump body oil supply structure can play a role similar to a sliding bearing, namely, in the lubricating oil which rotates rapidly, the oil pressure of a narrow place is high, the oil pressure of a wide place is small, when the movable disc 1 has a tendency of overturning, the height of the high-pressure oil groove on one side is necessarily low due to the overturning, and the height of the high-pressure oil groove on the other side is high, so that a moment for inhibiting the overturning of the movable disc 1 is formed, and the abrasion of the movable disc 1 caused by the overturning is reduced, and the reliability is improved.

Referring to fig. 4 to 6 in combination, according to an embodiment of the present application, a scroll compressor includes a pump body oil supply structure, which is the pump body oil supply structure described above.

Referring to fig. 4 in combination, in one embodiment, the scroll compressor further includes a crank oil path 12, an upper bracket oil path 13, and an oil return path 14, and when the bearing 8 and the first oil supply passage 9 are provided on the movable disc 1 and the second oil supply passage 10 is provided on the stationary disc 2, oil flows back to the oil sump through the crank oil path 12, the upper bracket oil path 13, the second oil supply passage 10, the high pressure region 3, the first oil supply passage 9, the inner cavity of the bearing 8, and the oil return path 14 in this order.

For this embodiment, in the compression process, oil is pumped into the crankshaft oil path 12 from the oil pump, and then is injected into the oil path outlet on the main journal along the crankshaft oil path 12, the trimming is provided on the main journal, the oil storage ring is provided on the upper bracket corresponding to the trimming, and the oil storage ring can store oil, so that a buffer space can be formed when the oil pressure is too high, and the oil can be effectively buffered. The upper bracket is provided with an upper bracket oil way 13, after the oil is stored and lubricates the main bearing, the oil is guided into a second oil supply channel 10 along the upper bracket oil way 13 and enters a high-pressure oil groove of the high-pressure area 3 along the second oil supply channel 10, then flows out of the first oil supply channel 9 and enters an inner cavity of the bearing 8, high-pressure oil is provided for the inner cavity of the bearing 8, the bearing 8 is lubricated by the high-pressure oil, then the high-pressure oil flows out of the inner cavity of the bearing 8 and flows back to an oil tank through an oil return channel 14, and oil way circulation is realized. In this process, the second oil supply passage 10 serves as an oil supply passage of the high-pressure oil tank, and the first oil supply passage 9 serves as an oil discharge passage of the high-pressure oil tank.

Referring to fig. 5 in combination, in one embodiment, the scroll compressor further includes a crank oil path 12, an upper bracket oil path 13, and an oil return path 14, and when the bearing 8 and the first oil supply passage 9 are provided on the movable disc 1 and the second oil supply passage 10 is provided on the stationary disc 2, oil flows back to the oil sump through the crank oil path 12, the inner cavity of the bearing 8, the first oil supply passage 9, the high pressure region 3, the second oil supply passage 10, and the oil return path 14 in order.

For the embodiment, in the compression process, oil is led out from the bottom of the crankshaft to the inner cavity of the bearing 8 of the movable disc 1, then enters the high-pressure oil tank along the first oil supply channel 9, then flows out from the second oil supply channel 10 through the high-pressure oil tank, is led back to the upper bracket, and finally is directly led back to the bottom oil pool through the oil return channel 14 on the upper bracket, so that oil circuit circulation is realized. In this process, the first oil supply passage 9 serves as an oil supply passage of the high-pressure oil tank, and the second oil supply passage 10 serves as an oil discharge passage of the high-pressure oil tank. In this embodiment, the oil circuit structure is simpler, need not to set up the upper bracket oil circuit on the upper bracket, consequently can reduce part quantity, reduces upper bracket trompil number, reduce processing cost.

In this embodiment, the high-pressure oil tank is only communicated with the oil inlet channel, and no oil outlet channel is provided, so that the high-pressure oil can be stored in the high-pressure oil tank, and in this case, the oil in the high-pressure oil tank only plays a role in enhancing lubrication and preventing overturning, and no oil circuit circulation is formed.

It will be readily appreciated by those skilled in the art that the above advantageous ways can be freely combined and superimposed without conflict.

The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application. The foregoing is merely a preferred embodiment of the present application, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present application, and these modifications and variations should also be regarded as the scope of the application.

Claims (17)

1. The utility model provides a pump body oil feed structure, its characterized in that, including moving dish (1) and quiet dish (2), move dish (1) orientation the terminal surface of quiet dish (2) is provided with the orientation quiet dish (2) convex bulge, quiet dish (2) orientation move the terminal surface of dish (1) and be provided with the depressed part, the bulge can movably set up in the depressed part, and will the depressed part becomes high pressure region (3) and well pressure region (4) of mutual isolation, high pressure region (3) are through advance oil channel and high pressure oil chamber intercommunication, be provided with oil storage chamber (5) on the depressed part of quiet dish (2), oil storage chamber (5) intermittent type with high pressure region (3) or well pressure region (4) intercommunication high pressure region (3) are carried out the oil storage, and are right high pressure region (4) are carried out, high pressure region (3) are high pressure oil groove, well pressure region (4) are well pressure oil groove.

2. Pump body oil supply structure according to claim 1, characterized in that it further comprises an oil outlet channel communicating with the high pressure area (3), through which oil entering the high pressure area (3) from the oil inlet channel can flow out of the high pressure area (3).

3. Pump body oil supply structure according to claim 1, characterized in that the bulge is a bulge loop (6), the recess is an annular groove (7), the inner annular wall of the bulge loop (6) and the inner annular wall of the annular groove (7) enclose the high pressure area (3), and the outer annular wall of the bulge loop (6) and the outer annular wall of the annular groove (7) enclose the medium pressure area (4).

4. A pump body oil supply structure according to claim 3, characterized in that the high pressure area (3) is a dynamic annular oil groove, the range of the high pressure area (3) changes during revolution of the movable disk (1), and the total area of the high pressure area (3) is unchanged.

5. Pump body oil supply structure according to claim 1, characterized in that the oil storage cavities (5) are arranged at the bottom of the recess, the number of the oil storage cavities (5) is at least two, and at least two oil storage cavities (5) are arranged along the circumferential direction of the static disc (2).

6. Pump body oil supply structure according to claim 5, characterized in that the number of the oil storage cavities (5) is four, and the four oil storage cavities (5) are uniformly distributed along the circumferential direction of the static disc (2).

7. A pump body oil supply structure according to claim 3, characterized in that the collar (6) is capable of entirely covering the oil storage chamber (5) when the collar (6) is moved to the oil storage chamber (5).

8. A pump body oil supply structure according to claim 3, characterized in that the minimum distance between the oil reservoir (5) and the outer annular wall of the annular groove (7) is greater than the thickness of the collar (6), and/or that the minimum distance between the oil reservoir (5) and the inner annular wall of the annular groove (7) is greater than the thickness of the collar (6).

9. A pump body oil supply structure according to claim 3, characterized in that the oil storage chamber (5) located in the same radial direction as the preset point can be located entirely within the high pressure region (3) when the preset point on the convex ring (6) moves to the farthest position from the inner annular wall of the annular groove (7), and the oil storage chamber (5) located in the same radial direction as the preset point can be located entirely within the medium pressure region (4) when the preset point on the convex ring (6) moves to the nearest position from the inner annular wall of the annular groove (7).

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

11. Pump body oil supply structure according to claim 1, characterized in that the compression chamber of the static disc (2) is not in communication with the high pressure area (3).

12. Pump body oil supply structure according to claim 1, characterized in that it further comprises an oil outlet channel communicating with the high pressure area (3), through which oil entering the high pressure area (3) from the oil inlet channel can flow out of the high pressure area (3);

The movable disc (1) is provided with a bearing (8) and a first oil supply channel (9), the bearing (8) is arranged on the back side of the movable disc (1) away from the fixed disc (2), the first end of the first oil supply channel (9) is communicated with the high-pressure area (3), and the 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. A pump body oil supply structure according to claim 3, characterized in that it further comprises an oil outlet channel communicating with the high pressure region (3), through which oil entering the high pressure region (3) from the oil inlet channel can flow out of the high pressure region (3);

The static disc (2) is provided with a second oil supply channel (10), a first end of the second oil supply channel (10) is communicated with the high-pressure area (3), and a second end of the second oil supply channel (10) is arranged on the outer periphery side of the annular groove (7) and is spaced from the annular groove (7);

wherein the second oil supply channel (10) is the oil inlet channel or the oil outlet channel.

14. Pump body oil supply structure according to claim 13, characterized in that the first end of the second oil supply channel (10) is arranged on the inner peripheral side of the annular groove (7), the end surface of the static disc (2) on the inner peripheral side of the annular groove (7) is provided with an oil through groove (11), and the first end of the second oil supply channel (10) is communicated with the high pressure area (3) through the oil through groove (11).

15. A scroll compressor comprising a pump body oil supply structure, wherein the pump body oil supply structure is the pump body oil supply structure of any one of claims 1 to 14.

16. The scroll compressor according to claim 15, further comprising a crankshaft oil path (12), an upper bracket oil path (13) and an oil return path (14), wherein when a bearing (8) and a first oil supply channel (9) are arranged on the movable disc (1), a second oil supply channel (10) is arranged on the stationary disc (2), and the pump body oil supply structure further comprises an oil outlet channel, oil flows back to an oil pool through the crankshaft oil path (12), the upper bracket oil path (13), the second oil supply channel (10), the high pressure area (3), the first oil supply channel (9), an inner cavity of the bearing (8) and the oil return path (14) in sequence, wherein the first oil supply channel (9) is the oil outlet channel, and the second oil supply channel (10) is the oil inlet channel.

17. The scroll compressor of claim 15, further comprising a crankshaft oil path (12) and an oil return path (14), wherein when the movable disc (1) is provided with a bearing (8) and a first oil supply channel (9), the stationary disc (2) is provided with a second oil supply channel (10), and the pump body oil supply structure further comprises an oil outlet channel, oil flows back to an oil pool through the crankshaft oil path (12), an inner cavity of the bearing (8), the first oil supply channel (9), the high-pressure area (3), the second oil supply channel (10) and the oil return path (14) in sequence, wherein the first oil supply channel (9) is an oil inlet channel, and the second oil supply channel (10) is an oil outlet channel.