Device for improving lubrication state of mating surface and compressor

Abstract

The present invention provides a device and a compressor for improving the lubrication state of a mating surface. A friction pair surface is formed by rotating a first part relative to a second part. The friction pair surface includes a first mating surface of the first part and a second mating surface of the second part. The first mating surface is provided with a first pressure regulating hole of different depths, and / or the second mating surface is provided with a second pressure regulating hole of different depths. The lubricating fluid on the friction pair surface flows in shear, and a dynamic pressure effect is formed at the first pressure regulating hole and / or the second pressure regulating hole. At the position of the deep hole, the pressure formed by the dynamic pressure effect is small, and the deformation of the corresponding mating surface is small. At the position of the shallow hole, the pressure formed by the dynamic pressure effect is large, and the deformation of the corresponding mating surface is large, so that the first mating surface and / or the second mating surface are deformed, thereby forming a convergence gap between the first mating surface and the second mating surface, improving the bearing capacity of the lubricating fluid film, and improving the lubrication state of the mating surface.

Description

Technical Field

[0001] The invention relates to the technical field of fluid lubrication, and in particular to a device and a compressor for improving the lubrication state of a mating surface. Background Art

[0002] Wear on the end faces of pump body parts is a common failure mode of rotary compressors, especially the matching end faces such as roller and flange, roller and partition, which often suffer from abrasive, adhesion, fatigue and other wear forms, seriously affecting the long life and reliability of the compressor. During the normal and stable operation of the compressor, the roller end face is generally in a fluid lubrication state, but due to changes in operating conditions or external disturbances, the lubricating oil film has limited carrying capacity and cannot effectively resist external impacts, which can easily cause the oil film to rupture, forcing the matching end face to quickly enter a mixed lubrication or boundary lubrication state, resulting in increased friction coefficient and severe wear. To solve this problem, traditional theory believes that the smoother the friction pair surface is, the better the friction performance is. However, theoretical research and engineering practice in recent years have also shown that the smoother the friction pair surface is, the better it is. On the contrary, a certain surface roughness is conducive to the formation of lubricating oil film and thus reduces friction and wear. Appropriately processing a micro-texture texture arranged according to a certain rule on the surface of the moving pair can play a role in storing lubricating oil and impurity particles, and through the texture dynamic pressure effect, it can improve the carrying capacity of the fluid film, improve the end face lubrication state, and improve the tribological performance.

[0003] Therefore, in order to overcome the friction and wear of the roller end face of the rotary compressor and maintain the fluid lubrication state, the present invention provides a rotary compressor structure with a "quasi-waviness" microporous end face roller. The microporous structure with periodically changing depths is opened on the roller end face in the circumferential and radial directions to produce different dynamic pressure effects, control the circumferential waviness and radial taper deformation of the end face as a whole, enhance the fluid dynamic pressure and static pressure capacity, improve the fluid film bearing capacity, rigidity and resistance to external interference, thereby maintaining the roller end face fluid lubrication state.

[0004] The Chinese patent authorization announcement number CN205896182U involves a dynamic and static pressure type columnar micro-convex body waviness distribution mechanical seal structure, in which the columnar micro-convex body texture height of the sealing end face presents a three-dimensional waviness distribution, wherein the radially converging taper micro-convex body can produce a static pressure effect, and the waviness distribution micro-convex body along the circumferential direction can produce a fluid dynamic pressure effect. On the one hand, the columnar texture has a strong crushing effect on the solid particles in the medium, and the crushed particles can be discharged in time from the micro-convex body gap; on the other hand, the micro-convex body gap helps the fluid to dissipate heat and reduce the end face temperature rise.

[0005] The height of the micro-protrusions in this patent application adopts a three-dimensional waviness distribution. In addition to the overall taper distribution and waviness distribution of the end face, the dynamic pressure effect of the columnar protrusions themselves is limited, and the structural strength of the protrusions is general, making them very susceptible to collision damage.

[0006] Chinese patent application publication number CN102322528A relates to a dynamic and static pressure combined asymmetric corrugated end face fluid mechanical seal structure, which adopts a combination of radial taper and circumferential asymmetric corrugation to prevent the accumulation of particles in the sealing fluid and achieve static sealing when the shaft is stationary. It has good start-stop effect, strong anti-interference ability, sufficient bearing capacity, small leakage and other effects, but the corrugated end face is difficult to process. Summary of the invention

[0007] In order to improve the load-bearing capacity of the lubricating fluid film and improve the lubrication state of the mating surface, the present invention provides a device and a compressor for improving the lubrication state of the mating surface. The specific scheme is as follows:

[0008] A device for improving the lubrication state of a mating surface, comprising a first part and a second part, wherein the first part can rotate relative to the second part to form a friction pair surface, and the friction pair surface comprises a first mating surface of the first part and a second mating surface of the second part;

[0009] The first mating surface is provided with first pressure regulating holes of different depths, and / or

[0010] The second matching surface is configured with second pressure regulating holes of different depths.

[0011] Furthermore, the first pressure regulating holes are respectively distributed along the circumferential direction and the radial direction of the first matching surface to form a first annular pressure regulating hole unit;

[0012] The depth of the first pressure regulating hole changes periodically along the circumferential direction of the first matching surface.

[0013] Furthermore, the depth of the first pressure regulating hole changes periodically along the radial direction of the first matching surface;

[0014] In one cycle in which the depth of the first pressure regulating hole changes periodically along the radial direction of the first matching surface, the depth of the first pressure regulating hole gradually increases from inside to outside and then gradually decreases from inside to outside.

[0015] Furthermore, within a period in which the depth of the first pressure regulating holes changes periodically along the radial direction of the first mating surface, the two deepest first pressure regulating holes are spaced a first preset distance apart to form a first dam area ring band located on the first mating surface, and no hole is opened in the first dam area ring band.

[0016] Furthermore, the first preset distance is 1 to 10 mm.

[0017] Furthermore, within a period in which the depth of the first pressure regulating hole periodically changes along the radial direction of the first mating surface, the opening area density of the opening region on the inner side of the first dam area ring band ranges from 0.05 to 0.5, and the opening area density of the opening region on the outer side of the first dam area ring band ranges from 0.05 to 0.5.

[0018] Further, within one period in which the depth of the first pressure regulating hole changes periodically along the radial direction of the first matching surface, the depth of the first pressure regulating hole is symmetrically distributed along the radial direction of the first matching surface.

[0019] Furthermore, the depth of the first pressure regulating hole changes periodically along the radial direction of the first matching surface once or more times.

[0020] Furthermore, the depth of the first pressure regulating hole changes periodically along the circumferential direction of the first matching surface in a manner that follows a sine function or a cosine function.

[0021] Furthermore, the depth of the first pressure regulating hole changes periodically 3 to 40 times along the circumferential direction of the first matching surface.

[0022] Furthermore, the depth of the first pressure regulating hole is 1-50 μm, and the diameter of the first pressure regulating hole is 10-1000 μm.

[0023] Furthermore, the first pressure regulating hole is one or more of a circular hole, an elliptical hole, a triangular hole, a diamond hole, a rectangular hole and a honeycomb hole.

[0024] Furthermore, the diameters of the first pressure regulating holes are all the same or the diameters of the first pressure regulating holes gradually decrease along the fluid flow direction.

[0025] Furthermore, the second pressure regulating holes are respectively distributed along the circumferential direction and the radial direction of the second matching surface to form a second annular pressure regulating hole unit;

[0026] The depth of the second pressure regulating hole changes periodically along the circumferential direction of the second matching surface.

[0027] Furthermore, the depth of the second pressure regulating hole changes periodically along the radial direction of the second matching surface;

[0028] In one cycle in which the depth of the second pressure regulating hole changes periodically along the radial direction of the second matching surface, the depth of the second pressure regulating hole gradually increases from the inside to the outside and then gradually decreases from the inside to the outside.

[0029] Furthermore, within a period in which the depth of the second pressure regulating holes changes periodically along the radial direction of the second mating surface, the two second pressure regulating holes with the deepest depths are spaced apart by a second preset distance to form a second dam area ring band located on the second mating surface, and no holes are opened in the second dam area ring band.

[0030] Furthermore, the second preset distance is 1 to 10 mm.

[0031] Furthermore, within a period in which the depth of the second pressure regulating hole periodically changes along the radial direction of the second mating surface, the opening area density of the opening region on the inner side of the second dam area ring band ranges from 0.05 to 0.5, and the opening area density of the opening region on the outer side of the second dam area ring band ranges from 0.05 to 0.5.

[0032] Further, within one period in which the depth of the second pressure regulating hole changes periodically along the radial direction of the second matching surface, the depth of the second pressure regulating hole is symmetrically distributed along the radial direction of the second matching surface.

[0033] Furthermore, the depth of the second pressure regulating hole changes periodically along the radial direction of the second matching surface once or more times.

[0034] Furthermore, the depth of the second pressure regulating hole changes periodically along the circumferential direction of the second matching surface in a manner that follows a sine function or a cosine function.

[0035] Furthermore, the depth of the second pressure regulating hole changes periodically 3 to 40 times along the circumferential direction of the second matching surface.

[0036] Furthermore, the depth of the second pressure regulating hole is 1-50 μm, and the diameter of the second pressure regulating hole is 10-1000 μm.

[0037] Furthermore, the second pressure regulating hole is one or more of a circular hole, an elliptical hole, a triangular hole, a diamond hole, a rectangular hole and a honeycomb hole.

[0038] Furthermore, the diameters of the second pressure regulating holes are all the same or the diameters of the second pressure regulating holes gradually decrease along the fluid flow direction.

[0039] A compressor, characterized by comprising the device as described above.

[0040] Compared with the prior art, the present invention forms a friction pair surface by rotating the first part relative to the second part, and the friction pair surface includes a first mating surface of the first part and a second mating surface of the second part, and the first mating surface is configured with a first pressure regulating hole of different depths, and / or the second mating surface is configured with a second pressure regulating hole of different depths. Since the first part rotates relative to the second part, the first mating surface rotates relative to the second mating surface, driving the lubricating fluid between the first mating surface and the second mating surface to shear flow, and a dynamic pressure effect is formed at the first pressure regulating hole and / or the second pressure regulating hole. At a position with a deeper depth, the pressure formed by the dynamic pressure effect is smaller, and the deformation of the corresponding mating surface is small. At a position with a shallower depth, the pressure formed by the dynamic pressure effect is larger, and the deformation of the corresponding mating surface is large. Through the change in the depth of the first pressure regulating hole and / or the second pressure regulating hole, the first mating surface and / or the second mating surface are deformed, thereby forming a convergence gap between the first mating surface and the second mating surface, improving the bearing capacity of the lubricating fluid film, and improving the lubrication state of the mating surface.

[0041] Since the convergence gap is formed by the dynamic pressure effect, the surface of the friction pair with the pressure regulating hole can be a plane and does not need to be processed into a corrugated surface, which reduces the difficulty of processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings, wherein:

[0043] Figure 1 is a structural diagram of a compressor in an embodiment of the present invention;

[0044] Figure 2 is a distribution diagram of the first pressure regulating holes on the upper end surface of the roller in an embodiment of the present invention;

[0045] Figure 3 for Figure 2 Cross-section at AA;

[0046] Figure 4 for Figure 2 The periodic variation diagram after the ring cross-section diagram BB is expanded;

[0047] Figure 5 A distribution diagram of first pressure regulating holes on the upper end surface of a roller in another embodiment of the present invention;

[0048] Figure 6 for Figure 5 Section CC in;

[0049] Figure 7 Schematic diagram of the opening area density in an embodiment of the present invention.

[0050] In the drawings, identical objects are denoted by identical reference numerals, and the drawings are not drawn to scale. DETAILED DESCRIPTION

[0051] The present invention will be further described below in conjunction with the accompanying drawings.

[0052] Embodiment 1:

[0053] This embodiment provides a device for improving the lubrication state of a mating surface, comprising a first part and a second part, wherein the first part can rotate relative to the second part to form a friction pair surface, and the friction pair surface comprises a first mating surface of the first part and a second mating surface of the second part;

[0054] The first mating surface is provided with first pressure regulating holes of different depths, and / or

[0055] The second matching surface is configured with second pressure regulating holes of different depths.

[0056] The device forms a friction pair surface by rotating the first part relative to the second part. The friction pair surface includes a first mating surface of the first part and a second mating surface of the second part. The first mating surface is provided with a first pressure regulating hole of different depths, and / or the second mating surface is provided with a second pressure regulating hole of different depths. Since the first part rotates relative to the second part, the first mating surface rotates relative to the second mating surface, driving the lubricating fluid between the first mating surface and the second mating surface to shear flow, forming a dynamic pressure effect at the first pressure regulating hole and / or the second pressure regulating hole. At a position with a deeper depth, the pressure formed by the dynamic pressure effect is smaller, and the deformation of the corresponding mating surface is smaller. At a position with a shallower depth, the pressure formed by the dynamic pressure effect is larger, and the deformation of the corresponding mating surface is larger. Through the change in the depth of the first pressure regulating hole and / or the second pressure regulating hole, the first mating surface and / or the second mating surface are deformed, thereby forming a convergence gap between the first mating surface and the second mating surface, improving the bearing capacity of the lubricating fluid film, and improving the lubrication state of the mating surface.

[0057] Figure 1 A compressor is shown, which includes the device for improving the lubrication state of the mating surface of this embodiment. The number of the devices is two sets, one of which is composed of the roller 1 and the upper flange 2 of the compressor, in which the first part is the roller 1 and the second part is the upper flange 2; the other set is composed of the roller 1 and the lower flange 3 of the compressor, in which the first part is the roller 1 and the second part is the lower flange 3. This embodiment is described by taking the device in which the first part is the roller 1 and the second part is the upper flange 2 as an example. The principle and structure of improving the lubrication state of the mating surface of the device in which the first part is the roller 1 and the second part is the lower flange 3 are the same as those of the device in which the first part is the roller 1 and the second part is the upper flange 2. The device of this embodiment is not limited to between the roller 1 and the flange, and the device is applicable to any friction pair formed by relative rotation, for example, between the roller 1 and the partition.

[0058] In this device in which the first part is the roller 1 and the second part is the upper flange 2, the roller 1 can rotate relative to the upper flange 2 around the rotation axis 4 to form a friction pair surface, the first mating surface of the friction pair surface is the upper end surface of the roller 1, and the second mating surface of the friction pair surface is the lower end surface of the upper flange 2. The first pressure regulating hole 111 with different depths can be constructed on the upper end surface of the roller 1, and the second pressure regulating hole with different depths can be constructed on the lower end surface of the upper flange 2. The first pressure regulating hole 111 with different depths can also be constructed on the upper end surface of the roller 1 and the second pressure regulating hole with different depths can also be constructed on the lower end surface of the upper flange 2. A preset gap is formed between the upper end surface of the roller 1 and the lower end surface of the upper flange 2 to allow the lubricating fluid to flow between the upper end surface of the roller 1 and the lower end surface of the upper flange 2.

[0059] The first mating surface is the upper end surface of roller 1. Figure 2 The distribution of the first pressure regulating holes 111 located on the upper end surface of the roller 1 is shown. The first pressure regulating holes 111 are distributed along the circumferential direction and the radial direction of the first mating surface respectively to form a first annular pressure regulating hole unit; the depth of the first pressure regulating holes 111 changes periodically along the circumferential direction of the first mating surface.

[0060] Due to the existence of the first pressure regulating hole 111, when the roller 1 rotates relative to the upper flange 2 around the rotation axis 4, the lubricating fluid between the upper end surface of the roller 1 and the lower end surface of the upper flange 2 is driven to shear and flow, and a dynamic pressure effect is generated at the first pressure regulating hole 111, so that the upper end surface of the roller 1 is greatly deformed at the position of the first pressure regulating hole 111 with a shallower depth, and the upper end surface of the roller 1 is less deformed at the position of the first pressure regulating hole 111 with a deeper depth, so that the upper end surface of the roller 1 is periodically fluctuated along the circumferential direction of the first matching surface, forming multiple peaks and troughs. The gap between the upper end surface of the roller 1 and the lower end surface of the upper flange 2 gradually decreases from the trough to the crest to form a convergence gap. The shear flow of the lubricating fluid produces a significant dynamic pressure effect at the convergence gap. The dynamic pressure effect formed by the convergence gap from the trough to the crest and the dynamic pressure effect formed by the first pressure regulating hole 111 both play a role in improving the carrying capacity of the fluid film of the lubricating fluid, thereby improving the fluid film stiffness and the ability to resist external interference, and ultimately maintaining a stable fluid lubrication state on the friction pair surface, thereby improving the lubrication state of the friction pair surface.

[0061] The depth of the first pressure regulating hole 111 changes periodically along the radial direction of the first mating surface; within a period in which the depth of the first pressure regulating hole 111 changes periodically along the radial direction of the first mating surface, the depth of the first pressure regulating hole 111 gradually increases from inside to outside and then gradually decreases from inside to outside. Figure 3 In this embodiment, the outward direction is the direction away from the rotation axis 4, and the inward direction is the direction close to the rotation axis 4.

[0062] Due to the dynamic pressure effect of the first pressure regulating hole 111, the upper end face of the roller 1 has a large pressure and large deformation at the shallow hole position, and a small pressure and small deformation at the deep hole position, so that the gap between the upper end face of the roller 1 and the lower end face of the upper flange 2 gradually decreases outward and then gradually increases outward in a cycle in which the depth of the first pressure regulating hole 111 changes periodically along the radial direction of the first mating surface, thereby forming outward and inward convergence gaps respectively. Regardless of whether the lubricating fluid flows from the inside to the outside or from the outside to the inside, the hydrostatic pressure effect of the flowing lubricating fluid at the convergence gap is enhanced, further improving the bearing capacity of the fluid film of the lubricating fluid, and improving the lubrication state of the friction pair surface. In this embodiment, the inside refers to the side close to the rotation axis 4, and the outside refers to the side away from the rotation axis 4. The change in the depth of the first pressure regulating hole 111 causes the upper end face of the roller 1 to form a corrugated end face under the flow of the lubricating fluid.

[0063] In a period in which the depth of the first pressure regulating hole 111 changes periodically along the radial direction of the first mating surface, the two first pressure regulating holes 111 with the deepest depth are spaced apart by a first preset distance to form a first dam area annular zone 12 located on the first mating surface, and no hole is opened in the first dam area annular zone 12. The first preset distance may be 1 to 10 mm.

[0064] The provision of the first dam area annular belt 12 enables the friction pair surface to form a high-pressure dam area annular belt, which can reduce the leakage of the lubricating fluid in the end surface gap and improve the efficiency of the compressor.

[0065] In a period in which the depth of the first pressure regulating hole 111 changes periodically along the radial direction of the first mating surface, the opening area density of the opening region 13 inside the first dam ring zone 12 is in the range of 0.05 to 0.5, and the opening area density of the opening region 11 outside the first dam ring zone 12 is in the range of 0.05 to 0.5. Figure 7 As shown, in one cycle in which the depth of the first pressure regulating hole 111 changes periodically along the radial direction of the first mating surface, the opening area 13 inside the first dam area annular zone 12 can be an annular area between the concentric circle line 6 contacting the outermost first pressure regulating hole inside the first dam area annular zone 12 and the concentric circle line 5 contacting the innermost first pressure regulating hole; the opening area 11 outside the first dam area annular zone 12 can be an annular area between the concentric circle line 7 contacting the innermost first pressure regulating hole outside the first dam area annular zone 12 and the concentric circle line 8 contacting the outermost first pressure regulating hole. The opening area density of a region is the ratio of the opening area of ​​the hole to the area of ​​the corresponding region.

[0066] In one cycle in which the depth of the first pressure regulating hole 111 changes periodically along the radial direction of the first matching surface, the depth of the first pressure regulating hole 111 is symmetrically distributed along the radial direction of the first matching surface.

[0067] The depth of the first pressure regulating hole 111 changes periodically one or more times along the radial direction of the first matching surface. Figure 2 , Figure 3 The depth of the first pressure regulating hole 111 shown in the figure changes periodically once along the radial direction of the first matching surface. Figure 5 , Figure 6 The depth of the first pressure regulating hole 111 shown in the figure changes periodically twice along the radial direction of the first matching surface.

[0068] The depth of the first pressure regulating hole 111 changes periodically along the circumferential direction of the first mating surface in a manner that is a sine function or a cosine function. The depth of the first pressure regulating hole 111 changes periodically along the circumferential direction of the first mating surface 3 to 40 times. Figure 4 As shown in the figure, if the number of periodic changes represented by the ellipsis is not taken into account, then Figure 4 The number of periodic changes shown is 4. The depth of the first pressure regulating hole 111 is 1 to 50 μm, and the diameter of the first pressure regulating hole 111 is 10 to 1000 μm. The first pressure regulating hole 111 is one or more of a circular hole, an elliptical hole, a triangular hole, a diamond hole, a rectangular hole, and a honeycomb hole. The diameters of the first pressure regulating holes 111 are all the same or the diameter of the first pressure regulating hole 111 gradually decreases along the fluid flow direction.

[0069] The upper end surface of the roller 1 achieves a corrugated end surface effect by changing the hole depth when the lubricating fluid flows. The upper end surface of the roller 1 can be processed into a plane, which reduces the difficulty of processing the upper end surface of the roller 1.

[0070] The first pressure regulating hole can store lubricating liquid, which will be squeezed, carried or penetrated to the mating surface with the shearing movement, playing the role of secondary lubrication. By setting the ratio of the hole depth to the hole diameter, it can be applied to different lubricating media.

[0071] Embodiment 2:

[0072] The second mating surface is the lower end surface of the upper flange 2 . This embodiment mainly describes the second pressure regulating hole located on the lower end surface of the upper flange 2 , and the rest is the same as that of Embodiment 1.

[0073] The second pressure regulating holes are respectively distributed along the circumferential direction and the radial direction of the second mating surface to form a second annular pressure regulating hole unit; the depth of the second pressure regulating holes changes periodically along the circumferential direction of the second mating surface.

[0074] Due to the existence of the second pressure regulating hole, when the roller 1 rotates relative to the upper flange 2 around the rotation axis 4, the lubricating fluid between the upper end face of the roller 1 and the lower end face of the upper flange 2 is driven to shear flow, and a dynamic pressure effect is generated at the second pressure regulating hole, so that the lower end face of the upper flange 2 is greatly deformed at the position of the second pressure regulating hole with a shallow depth, and the lower end face of the upper flange 2 is less deformed at the position of the second pressure regulating hole with a deeper depth, so that the lower end face of the upper flange 2 produces a periodic fluctuation distribution along the circumferential direction of the second matching surface, forming multiple peaks and troughs, and the gap between the upper end face of the roller 1 and the lower end face of the upper flange 2 gradually decreases from the trough to the peak to form a convergence gap, and the shear-flowing lubricating fluid produces a significant dynamic pressure effect at the convergence gap. The dynamic pressure effect formed by the convergence gap from the trough to the peak and the dynamic pressure effect formed by the second pressure regulating hole both play a role in improving the carrying capacity of the fluid film of the lubricating fluid, thereby improving the fluid film stiffness and the ability to resist external interference, and finally maintaining a stable fluid lubrication state on the friction pair surface, so that the lubrication state of the friction pair surface is improved.

[0075] The depth of the second pressure regulating hole changes periodically along the radial direction of the second mating surface; within one cycle of the periodic change of the depth of the second pressure regulating hole along the radial direction of the second mating surface, the depth of the second pressure regulating hole gradually increases from the inside to the outside and then gradually decreases from the inside to the outside. In this embodiment, the outward direction is the direction away from the rotation axis 4, and the inward direction is the direction close to the rotation axis 4.

[0076] Due to the dynamic pressure effect of the second pressure regulating hole, the lower end face of the upper flange 2 has a large pressure and large deformation at the shallow hole position, and a small pressure and small deformation at the deep hole position, so that the gap between the upper end face of the roller 1 and the lower end face of the upper flange 2 gradually decreases outward and then gradually increases outward in a cycle in which the depth of the second pressure regulating hole changes periodically along the radial direction of the second mating surface, thereby forming outward and inward convergence gaps respectively. Regardless of whether the lubricating fluid flows from the inside to the outside or from the outside to the inside, the hydrostatic pressure effect of the flowing lubricating fluid at the convergence gap is enhanced, further improving the bearing capacity of the fluid film of the lubricating fluid, so that the lubrication state of the friction pair surface is improved. In this embodiment, the inside refers to the side close to the rotation axis 4, and the outside refers to the side away from the rotation axis 4. The depth change of the second pressure regulating hole causes the lower end face of the upper flange 2 to form a corrugated end face under the flow state of the lubricating fluid.

[0077] In a period in which the depth of the second pressure regulating hole changes periodically along the radial direction of the second mating surface, the two second pressure regulating holes with the deepest depth are spaced apart by a second preset distance to form a second dam area ring band located on the second mating surface, and no hole is opened in the second dam area ring band. The second preset distance can be 1 to 10 mm.

[0078] The provision of the second dam area ring belt enables the formation of a high-pressure dam area ring belt on the surface of the friction pair, which can reduce the leakage of the lubricating fluid in the end face gap and improve the efficiency of the compressor.

[0079] In one cycle in which the depth of the second pressure regulating hole changes periodically along the radial direction of the second mating surface, the opening area density of the opening area inside the second dam area annular zone is in the range of 0.05 to 0.5, and the opening area density of the opening area outside the second dam area annular zone is in the range of 0.05 to 0.5. In one cycle in which the depth of the second pressure regulating hole changes periodically along the radial direction of the second mating surface, the opening area inside the second dam area annular zone may be an annular area between the concentric circle line contacting the outermost second pressure regulating hole inside the second dam area annular zone and the concentric circle line contacting the innermost second pressure regulating hole; the opening area outside the second dam area annular zone may be an annular area between the concentric circle line contacting the innermost second pressure regulating hole outside the second dam area annular zone and the concentric circle line contacting the outermost second pressure regulating hole. The opening area density of a region is the ratio of the opening area of ​​the hole to the area of ​​the corresponding region.

[0080] In one cycle in which the depth of the second pressure regulating hole changes periodically along the radial direction of the second matching surface, the depth of the second pressure regulating hole is symmetrically distributed along the radial direction of the second matching surface.

[0081] The depth of the second pressure regulating hole changes periodically once or multiple times along the radial direction of the second matching surface.

[0082] The depth of the second pressure regulating hole changes periodically along the circumferential direction of the second mating surface according to a sine function or a cosine function. The depth of the second pressure regulating hole changes periodically along the circumferential direction of the second mating surface 3 to 40 times. The depth of the second pressure regulating hole is 1 to 50 μm, and the diameter of the second pressure regulating hole is 10 to 1000 μm. The second pressure regulating hole is one or more of a circular hole, an elliptical hole, a triangular hole, a diamond hole, a rectangular hole and a honeycomb hole. The diameters of the second pressure regulating holes are the same or the diameter of the second pressure regulating hole gradually decreases along the direction of fluid flow.

[0083] The lower end face of the upper flange 2 can achieve a corrugated end face effect by changing the hole depth when the lubricating fluid flows. The lower end face of the upper flange 2 can be processed into a plane, which reduces the difficulty of processing the lower end face of the upper flange 2.

[0084] The second pressure regulating hole can store lubricating liquid, which will be squeezed, carried or penetrated to the mating surface with the shearing movement, playing the role of secondary lubrication. By setting the ratio of the hole depth to the hole diameter, it can be applied to different lubricating media.

[0085] When the upper end surface of the roller 1 is configured with a first pressure regulating hole 111 and the lower end surface of the upper flange 2 is configured with a second high-pressure hole, the center of the first pressure regulating hole annular unit and the center of the second pressure regulating hole annular unit may be concentric. In other embodiments, when the upper end surface of the roller 1 is configured with a first pressure regulating hole 111 and the lower end surface of the upper flange 2 is configured with a second high-pressure hole, the center of the first pressure regulating hole annular unit and the center of the second pressure regulating hole annular unit may also be slightly eccentric.

[0086] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and some or all of the technical features may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no logical or structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A device for improving the lubrication state of the mating surface of a compressor, characterized in that: The first part comprises a first part and a second part, wherein the first part can rotate relative to the second part to form a friction pair surface, and the friction pair surface comprises a first mating surface of the first part and a second mating surface of the second part; The first mating surface is provided with first pressure regulating holes of different depths, and the second mating surface is provided with second pressure regulating holes of different depths; The first pressure regulating holes are respectively distributed along the circumferential direction and the radial direction of the first matching surface to form a first annular pressure regulating hole unit, and the depth of the first pressure regulating hole changes periodically along the circumferential direction of the first matching surface; The depth of the first pressure regulating hole changes periodically along the radial direction of the first mating surface. Within one cycle of the periodic change of the depth of the first pressure regulating hole along the radial direction of the first mating surface, the depth of the first pressure regulating hole gradually increases from inside to outside and then gradually decreases from inside to outside.

2. The device according to claim 1, characterized in that In a cycle in which the depth of the first pressure regulating holes changes periodically along the radial direction of the first mating surface, the two deepest first pressure regulating holes are spaced a first preset distance apart to form a first dam area ring band located on the first mating surface, and no hole is opened in the first dam area ring band.

3. The device according to claim 2, characterized in that The first preset distance is 1-10 mm.

4. The device according to claim 2, characterized in that Within a period in which the depth of the first pressure regulating hole changes periodically along the radial direction of the first mating surface, the opening area density of the opening region on the inner side of the first dam area ring band ranges from 0.05 to 0.5, and the opening area density of the opening region on the outer side of the first dam area ring band ranges from 0.05 to 0.

5.

5. The device according to claim 1, characterized in that In one cycle in which the depth of the first pressure regulating hole changes periodically along the radial direction of the first matching surface, the depth of the first pressure regulating hole is symmetrically distributed along the radial direction of the first matching surface.

6. The device according to claim 1, characterized in that The depth of the first pressure regulating hole changes periodically once or multiple times along the radial direction of the first matching surface.

7. The device according to claim 1, characterized in that The depth of the first pressure regulating hole changes periodically along the circumferential direction of the first matching surface in a manner that is a sine function or a cosine function.

8. The device according to claim 1, characterized in that The depth of the first pressure regulating hole changes periodically 3 to 40 times along the circumferential direction of the first matching surface.

9. The device according to any one of claims 1 to 8, characterized in that The depth of the first pressure regulating hole is 1-50 μm, and the diameter of the first pressure regulating hole is 10-1000 μm.

10. The device according to any one of claims 1 to 8, characterized in that The first pressure regulating hole is one or more of a circular hole, an elliptical hole, a triangular hole, a diamond hole, and a rectangular hole.

11. The device according to any one of claims 1 to 8, characterized in that The diameters of the first pressure regulating holes are all the same or the diameters of the first pressure regulating holes gradually decrease along the fluid flow direction.

12. The device according to claim 1, characterized in that The second pressure regulating holes are respectively distributed along the circumferential direction and the radial direction of the second matching surface to form a second annular pressure regulating hole unit; The depth of the second pressure regulating hole changes periodically along the circumferential direction of the second matching surface.

13. The device according to claim 12, characterized in that The depth of the second pressure regulating hole changes periodically along the radial direction of the second matching surface; In one cycle in which the depth of the second pressure regulating hole changes periodically along the radial direction of the second matching surface, the depth of the second pressure regulating hole gradually increases from the inside to the outside and then gradually decreases from the inside to the outside.

14. The device according to claim 13, characterized in that In a cycle in which the depth of the second pressure regulating holes changes periodically along the radial direction of the second mating surface, the two second pressure regulating holes with the deepest depths are spaced apart by a second preset distance to form a second dam area ring band located on the second mating surface, and no hole is opened in the second dam area ring band.

15. The device according to claim 14, characterized in that The second preset distance is 1-10 mm.

16. The device according to claim 14, characterized in that Within a period in which the depth of the second pressure regulating hole changes periodically along the radial direction of the second mating surface, the opening area density of the opening region on the inner side of the second dam area ring band ranges from 0.05 to 0.5, and the opening area density of the opening region on the outer side of the second dam area ring band ranges from 0.05 to 0.

5.

17. The device according to claim 13, characterized in that In one cycle in which the depth of the second pressure regulating hole changes periodically along the radial direction of the second matching surface, the depth of the second pressure regulating hole is symmetrically distributed along the radial direction of the second matching surface.

18. The device according to claim 13, characterized in that The depth of the second pressure regulating hole changes periodically once or multiple times along the radial direction of the second matching surface.

19. The device according to claim 12, characterized in that The depth of the second pressure regulating hole changes periodically along the circumferential direction of the second matching surface in a manner that is a sine function or a cosine function.

20. The device according to claim 12, characterized in that The depth of the second pressure regulating hole changes periodically 3 to 40 times along the circumferential direction of the second matching surface.

21. The device according to any one of claims 12 to 20, characterized in that The depth of the second pressure regulating hole is 1-50 μm, and the diameter of the second pressure regulating hole is 10-1000 μm.

22. The device according to any one of claims 12 to 20, characterized in that The second pressure regulating hole is one or more of a circular hole, an elliptical hole, a triangular hole, a diamond hole, and a rectangular hole.

23. The device according to any one of claims 12 to 20, characterized in that The diameters of the second pressure regulating holes are all the same or the diameters of the second pressure regulating holes gradually decrease along the fluid flow direction.

24. A compressor, characterized in that: Comprising a device as described in any one of claims 1-23.

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