CN110242575B - Friction piece, compressor, air conditioner and friction surface treatment method - Google Patents
Friction piece, compressor, air conditioner and friction surface treatment method Download PDFInfo
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- CN110242575B CN110242575B CN201910522593.0A CN201910522593A CN110242575B CN 110242575 B CN110242575 B CN 110242575B CN 201910522593 A CN201910522593 A CN 201910522593A CN 110242575 B CN110242575 B CN 110242575B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2230/00—Manufacture
- F04C2230/90—Improving properties of machine parts
- F04C2230/91—Coating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2230/00—Manufacture
- F04C2230/90—Improving properties of machine parts
- F04C2230/92—Surface treatment
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/10—Stators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/20—Rotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/80—Other components
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
The invention provides a friction piece, a compressor, an air conditioner and a friction surface processing method of the friction piece, and relates to the field of air conditioners. The friction piece is provided with a friction surface, a plurality of oil storage holes are formed in the friction surface, and an included angle between the depth direction of each oil storage hole and the friction surface is an acute angle. Due to the design of the oil storage hole, lubricating oil can be stored in the oil storage hole, and because the included angle between the depth direction of the oil storage hole and the friction surface is an acute angle, when the oil storage hole is arranged in the direction from shallow to deep to form an acute angle with the opposite direction of the friction force borne by the friction surface, the lubricating oil in the oil storage hole is more easily taken out to the friction surface, the possibility that the friction surface is subjected to dry friction is reduced, and the lubricating oil can be used for continuously lubricating the friction surface; when the direction of the oil storage hole from shallow to deep is set to form an acute angle with the direction of the friction force applied to the friction surface, the dynamic pressure effect on the friction surface is enhanced, the oil film pressure on the friction surface is increased, the oil film is prevented from being broken under the condition of high load, and the possibility that the friction surface is subjected to dry friction is reduced.
Description
Technical Field
The invention relates to the field of air conditioners, in particular to a friction piece, a compressor, an air conditioner and a friction surface processing method.
Background
At present, a compressor is provided with various friction parts, such as sliding vanes, flanges, cylinders, rollers, movable scroll plates, fixed scroll plates, cross slip rings and the like, and the friction parts are seriously worn during long-term operation, particularly under the condition that lubricating oil is not supplemented timely, dry friction is easy to occur, and the friction force is increased rapidly.
The traditional theory of tribology considers that the smoother the friction surface, the smaller the friction coefficient, the smaller the corresponding friction force, and the smaller the wear of the parts. However, recent researches show that the smoother the friction surface is, the better the wear condition is, a series of micro-textures with different sizes, depths, area ratios and arrangement modes are properly processed on the surface of the motion friction pair, the effects of storing lubricating media and impurity particles can be achieved, the fluid film bearing capacity is improved through the dynamic pressure effect of the textures, the end surface lubrication state is improved, the friction wear can be effectively reduced, and the tribology performance is improved.
Based on this, chinese utility model patent with publication number CN207961278U provides a composite surface texture friction pair, which adopts the combination of groove type and pit type surface textures to improve the boundary lubrication state and increase the oil film pressure, and reduce the friction coefficient of the friction surface, the groove and the pit of the scheme have certain oil storage capacity, however, the depth direction of the pit in the scheme is perpendicular to the friction surface, because the depth direction of the pit is perpendicular to the friction surface, the lubricating oil in the pit is not easy to be brought out in the sliding process of the friction pair, which makes the friction surface easily generate dry friction phenomenon, leads to the sharp increase of friction force, affects the friction performance and service life of the components; secondly, because the depth direction of the pits is perpendicular to the friction surface, under the condition of large load, the oil film may break due to insufficient oil film pressure, which also easily causes the dry friction phenomenon on the friction surface, causes the friction force to increase rapidly, and affects the friction performance and the service life of the parts.
Disclosure of Invention
One of the objects of the present invention is to provide a friction member which facilitates continuous lubrication of the friction surface.
In order to achieve the above object, the present invention provides a friction member having a friction surface; the friction surface is provided with a plurality of oil storage holes, and the included angle between the depth direction of the oil storage holes and the friction surface is an acute angle.
Therefore, the friction piece can store the lubricating oil in the oil storage hole due to the design of the oil storage hole, and the included angle between the depth direction of the oil storage hole and the friction surface is an acute angle, so that the friction force and the depth direction of the oil storage hole form an acute angle or an obtuse angle; for the high load condition, the direction of the oil storage hole from shallow to deep can be set to form an acute angle with the direction of the friction force applied to the friction surface, and compared with the oil storage hole in the depth direction perpendicular to the friction surface, the oil storage hole with the angle is more favorable for generating a dynamic pressure effect on the friction surface, increasing the oil film pressure on the friction surface, avoiding the oil film from being broken under the high load condition and reducing the possibility of dry friction on the friction surface; of course, the oil storage holes under the two conditions can be arranged on the friction surface, so that the oil quantity on the friction surface is ensured to be sufficient, the dynamic pressure effect is generated on the friction surface, the oil film pressure is increased, and the friction piece is convenient to adapt to different working conditions; the depth direction of the oil reservoir is not a direction perpendicular to the frictional surface but a direction extending from the frictional surface to the deep part of the friction material along the oil reservoir, and for example, if the oil reservoir is a hole having a circular opening shape, the depth direction is the axial direction of the oil reservoir, and if the oil reservoir is a polygonal opening shape, the depth direction is the extension direction of the edge of the oil reservoir.
Preferably, the oil reservoir has an angle of 30 ° to 80 ° between the depth direction of the oil reservoir and the friction surface.
In a further preferred embodiment, the array of oil holes is distributed over the friction surface.
As can be seen, the lubricating oil thus taken out from the oil reservoir can be uniformly distributed on the friction surfaces.
Still preferably, the opening of the oil hole is circular, the opening diameter of the oil hole is 50 to 400 micrometers, and the distance from the bottom of the oil hole to the friction surface is 10 to 200 micrometers.
In a further preferred embodiment, the friction surface is provided with a first groove, and the opening of each oil reservoir is located in the first groove.
Therefore, lubricating oil can enter the oil storage hole under the guidance of the first groove, and the lubricating oil can be collected by the oil storage hole conveniently.
Further, the width of the first trench is 30 to 200 micrometers, and the depth of the first trench is 5 to 100 micrometers.
The further scheme is that the number of the first grooves is multiple, each first groove is distributed at intervals along a third direction, each adjacent first groove is spaced by 100-500 micrometers, the third direction is perpendicular to the normal direction of the friction surface, and the third direction is perpendicular to the extending direction of the first grooves.
As can be seen from the above, for example, if the friction force applied to the friction member is a circumferential force around an axis, the first grooves may be a plurality of grooves extending along the radial direction and distributed along the circumferential direction, or the first grooves may be a plurality of ring grooves extending along the circumferential direction and distributed along the radial direction, with the axis as a center; for another example, the first grooves are a plurality of grooves extending along a certain straight line and distributed at intervals along a direction perpendicular to the straight line; therefore, the lubricating oil is conveniently guided to all parts of the friction surface through the first grooves, so that the lubricating oil is uniformly distributed on the friction surface as far as possible, and the dry friction phenomenon of a large area on the friction surface is avoided.
The friction surface is provided with a plurality of first grooves and a plurality of second grooves, each first groove is intersected with each second groove, and the oil storage holes are distributed at each intersection of the first grooves and the second grooves.
Therefore, the lubricating oil in the first groove and the lubricating oil in the second groove can be communicated with each other, and the lubricating oil is further favorably and uniformly distributed on the friction surface.
Further, the first grooves are distributed at intervals along the extending direction of the second grooves, and the second grooves are distributed at intervals along the extending direction of the first grooves.
Still further, each adjacent first trench is spaced apart by 100 to 500 microns, and/or each adjacent second trench is spaced apart by 100 to 500 microns.
In another preferred embodiment, the direction from the shallow to the deep along the oil storage hole is a first direction, each first direction forms an acute angle with a negative direction of a second direction, and the second direction is perpendicular to a normal direction of the friction surface.
Therefore, when the positive direction of the second direction is the direction of the friction force, the lubricating oil is easily brought out from the oil storage hole, so that continuous and good lubrication can be provided for the friction surface; when the negative direction of the second direction is the direction of the friction force, the dynamic pressure effect between the friction member and the external entity is enhanced.
Further, the first direction is perpendicular to the extending direction of the second trench.
Therefore, when the friction surface receives the friction force along the second direction, the lubricating oil can be more favorably led out from the oil storage hole, and the friction surface can be more favorably lubricated.
Still preferably, the plurality of oil reservoir holes includes a plurality of first holes and a plurality of second holes; the direction from shallow to deep along the first hole is the fourth direction, the direction from shallow to deep along the second hole is the fifth direction, the included angle between each fourth direction and the positive direction of the second direction is an acute angle, the included angle between each fifth direction and the negative direction of the second direction is an acute angle, and the second direction is perpendicular to the normal direction of the friction surface.
Therefore, when the friction force borne by the friction surface is in the positive direction of the second direction, the lubricating oil in the second hole is easily carried out to the friction surface, and the continuous good lubrication of the friction surface is favorably ensured; the first hole is beneficial to generating dynamic pressure effect on the friction surface and increasing oil film pressure; when the friction force borne by the friction surface is along the negative direction of the second direction, the lubricating oil in the first hole is easily brought out to the friction surface, and the second hole is favorable for generating a dynamic pressure effect on the friction surface and increasing the oil film pressure on the friction surface; therefore, whether the friction force borne by the friction surface is in the positive direction along the second direction or in the negative direction along the second direction, the oil quantity on the friction surface is ensured to be sufficient, the dynamic pressure effect on the friction surface is generated, the oil film pressure on the friction surface is increased, and the friction piece is convenient to adapt to different working conditions.
Still another preferred scheme is, have surface hardening layer and self-lubricating coating on the friction member, self-lubricating coating covers on surface hardening layer, and the surface of self-lubricating coating is the friction surface.
From top to bottom, owing to carried out the case hardening treatment with the friction surface of the base member of friction spare, formed the case hardening layer to add self-lubricating coating on the case hardening layer, make the coefficient of friction surface reduce, even a small amount of dry friction phenomenon appears in the friction surface, the friction surface also can not receive great frictional force, is favorable to reducing the wearing and tearing of friction surface, reduces the influence of friction to the part performance.
Another object of the present invention is to provide a compressor which is advantageous for continuous lubrication of friction surfaces.
In order to achieve the above object, the present invention provides a compressor including the above friction member.
It is thus clear that the friction spare can be in the compression spare in the gleitbretter, the flange, the cylinder, the roller, move one or more in the vortex dish, the static vortex dish, parts such as cross sliding ring, adopt aforementioned friction spare to be favorable to reducing the gleitbretter, the flange, the cylinder, the roller, move the vortex dish, the static vortex dish, the possibility that parts such as cross sliding ring appear dry friction, parts such as packing gleitbretter, the flange, the cylinder, the roller, move the vortex dish, the static vortex dish, cross sliding ring continue well-lubricated, are favorable to guaranteeing the compressor and continue the efficient operation.
It is another object of the present invention to provide an air conditioner which facilitates the continuous lubrication of the friction surfaces.
In order to achieve the above object, the present invention provides an air conditioner including the compressor.
Therefore, due to the adoption of the compressor, dry friction is not easy to occur to parts in the compressor, continuous and efficient operation of the compressor is guaranteed, and continuous and efficient operation of an air conditioner is guaranteed.
The fourth object of the present invention is to provide a friction surface treatment method which is advantageous for the continuous lubrication of the friction surface.
In order to achieve the above object, the present invention provides a friction surface processing method of a friction member, comprising: carrying out surface hardening treatment on the friction surface of the base body of the friction piece to form a surface hardening layer; adding a self-lubricating coating on the surface hardening layer, wherein the surface of the self-lubricating coating is a friction surface; a plurality of oil storage holes are processed on the friction surface, and the included angle between the depth direction of the oil storage holes and the friction surface is an acute angle.
Therefore, the oil storage holes are processed on the surface of the friction surface, so that the friction surface is not easy to generate dry friction, and the friction surface is ensured to be continuously and well lubricated; in addition, the friction surface of the base body of the friction piece is subjected to surface hardening treatment and added with the self-lubricating coating, so that the friction coefficient of the friction surface is reduced, and even if a small amount of dry friction phenomenon occurs on the friction surface, the friction surface cannot be subjected to larger friction force, the abrasion of the friction surface is favorably reduced, and the influence of the friction on the performance of the part is reduced.
Preferably, the friction surface is provided with a plurality of first grooves and a plurality of second grooves, each first groove is intersected with each second groove, and the oil storage holes are distributed at each intersection of the first grooves and the second grooves.
Another preferred scheme is that the direction from shallow to deep along the oil storage hole is a first direction, each first direction forms an acute angle with the negative direction of a second direction, and the second direction is perpendicular to the normal direction of the friction surface.
Still another preferred scheme is that a part of the oil storage holes are first holes, and the other part of the oil storage holes are second holes; the direction from shallow to deep along the first hole is the fourth direction, the direction from shallow to deep along the second hole is the fifth direction, the included angle between each fourth direction and the positive direction of the second direction is an acute angle, the included angle between each fifth direction and the negative direction of the second direction is an acute angle, and the second direction is perpendicular to the normal direction of the friction surface.
Still more preferably, the case hardening treatment has a thickness of 5 to 20 μm.
It is also preferred that the self-lubricating coating has a thickness of 0.5 to 2 microns.
Drawings
FIG. 1 is a schematic perspective cross-sectional view of a first embodiment of a friction member according to the present invention;
FIG. 2 is a schematic cross-sectional view of a first embodiment of the friction member of the present invention;
FIG. 3 is a schematic view of the lubricating oil carried out of the oil reservoir in the first embodiment of the friction member of the present invention;
FIG. 4 is a schematic view of lubricant being forced into the oil reservoir in a first embodiment of the friction member of the present invention;
FIG. 5 is a schematic illustration of a friction face treatment in one embodiment of a friction member according to the present invention;
FIG. 6 is a schematic cross-sectional view of a second embodiment of the friction member of the present invention.
The invention is further explained with reference to the drawings and the embodiments.
Detailed Description
Friction piece, compressor, air conditioner and friction surface processing method embodiment one of friction piece:
this embodiment is explained with reference to the coordinate system shown in fig. 1.
The air conditioner of the embodiment includes the compressor of the embodiment, the compressor of the embodiment includes parts such as a sliding vane, a flange, a cylinder, a roller, a movable scroll, a fixed scroll, a cross slip ring, etc., the friction member of the embodiment may be all or a part of the sliding vane, the flange, the cylinder, the roller, the movable scroll, the fixed scroll, the cross slip ring, etc., and the friction surface 1 of the friction member of the embodiment is obtained by processing the friction surface processing method of the friction member of the embodiment.
Referring to fig. 1 to 5, the friction member has a friction surface 1, a normal direction of the friction surface 1 is along a Z-axis direction, the friction surface 1 is provided with a plurality of first grooves 2, a plurality of second grooves 3 and a plurality of oil storage holes 4, each first groove 2 extends along an X-axis direction, each first groove 2 is distributed at intervals along a Y-axis direction, each second groove 3 extends along the Y-axis direction, each second groove 3 is distributed at intervals along the X-axis direction, each first groove 2 and each second groove 3 are interlaced together to form a mesh-shaped texture, and each oil storage hole 4 is distributed at an intersection position of each first groove 2 and each second groove 3.
Referring to fig. 1 and 2, the spacing distance between each adjacent first groove 2 is 150 micrometers, the spacing distance L between each adjacent second groove 3 is 150 micrometers, the width of each first groove 2 and the width D1 of each second groove 3 are both 30 micrometers, the depth of each first groove 2 and the depth H1 of each second groove 3 are both 40 micrometers, the opening shape of the oil hole 4 is circular, the opening diameter D2 of the oil hole 4 is 50 micrometers, and the distance H2 from the friction surface 1 to the bottom of the oil hole 4 is 90 micrometers.
Alternatively, the size parameters of the first groove 2, the second groove 3 and the oil storage hole 4 can be specifically set according to the use condition, for example: the spacing distance between every two adjacent first grooves 2 is 100 micrometers, the spacing distance L between every two adjacent second grooves 3 is 100 micrometers, the width of each first groove 2 and the width D1 of each second groove 3 are both 30 micrometers, the opening diameter D2 of the oil storage hole 4 is 50 micrometers, the depth of each first groove 2 and the depth H1 of each second groove 3 are both 5 micrometers, and the distance H2 from the friction surface 1 to the bottom of the oil storage hole 4 is 10 micrometers; another example is: the spacing distance between each adjacent first groove 2 is 500 micrometers, the spacing distance L between each adjacent second groove 3 is 500 micrometers, the width of each first groove 2 and the width D1 of each second groove 3 are both 200 micrometers, the opening diameter D2 of the oil storage hole 4 is 400 micrometers, the depth H1 of each first groove 2 and the depth H1 of each second groove 3 are both 100 micrometers, and the distance H2 from the friction surface 1 to the bottom of the oil storage hole 4 is 200 micrometers.
Alternatively, the opening shape of the oil storage hole 4 may be a polygon such as a quadrangle, a pentagon, and the like, and preferably, the opening shape of the oil storage hole 4 is an ellipse, the cross-sectional shape of the oil storage hole 4 perpendicular to the depth direction is a circle, the major axis of the ellipse is along the X-axis direction, and the minor axis of the ellipse is along the Y-axis direction, so that on one hand, the processing of the oil storage hole 4 is facilitated, and on the other hand, the oil discharge in the oil storage hole 4 is also facilitated.
Referring to fig. 3, fig. 3 is a schematic diagram of the friction member of this embodiment when receiving a friction force F, where an included angle between the first direction a of the oil storage hole 4 and the negative direction of the friction force F is 57 °, the lubricating oil 7 in the oil storage hole 4 is smoothly brought to the friction surface 1 under the action of F, a negative pressure is formed at the bottom of the oil storage hole 4 after the lubricating oil 7 is brought out, the lubricating oil 7 is kept near the oil storage hole 4 by the action of the negative pressure at the bottom and the adhesion force between the lubricating oil 7, so as to prevent the lubricating oil 7 from being lost, and ensure that the lubricating oil 7 continuously provides lubrication for the friction.
Of course, compared with the oil storage hole 4 perpendicular to the friction surface in the depth direction, in this embodiment, when the friction member receives the direction of the friction force and the friction force F shown in fig. 4, the lubricating oil between the external entity and the friction member is more easily pressed to the oil storage hole 4 under the action of the relative motion, which is more beneficial to storing the lubricating oil in the oil storage hole 4, and the lubricating oil in the oil storage hole 4 generates a reaction force F1 after being pressed, which is more beneficial to generating a dynamic pressure effect between the friction member and the external entity, and is beneficial to increasing the oil film pressure between the friction surface 1 and the external entity.
The depth direction of the oil storage hole 4 is vertical to the Y-axis direction, the direction from shallow to deep along the oil storage hole 4 is a first direction a, and the included angle between the first direction a and the positive direction of the X-axis is 30 degrees. When an external entity rubs and moves on the friction surface 1, due to the arrangement of the first grooves 2, the second grooves 3 and the oil storage holes 4, a dynamic pressure effect can be generated between the friction surface 1 and the external entity, and the friction force between the external entity and a friction piece can be reduced; on the other hand, after lubricating oil is added between the friction piece and the external entity, under the guide of the first groove 2 and the second groove 3, the lubricating oil can be rapidly and uniformly distributed between the friction piece and the external entity, and the first groove 2, the second groove 3 and the oil storage hole 4 have an oil storage function on the lubricating oil, so that the lubricating oil can be kept between the friction piece and the external entity, and the lubricating oil is prevented from being lost between the external entity and the friction piece; in addition, when the friction surface is subjected to a small load, the friction force applied to the friction surface 1 is preferably applied to the situation that the friction force applied to the friction surface 1 is negative along the X axis, based on the principle illustrated in fig. 3, because the oil storage hole 4 and the positive direction of the X axis have the above-mentioned included angle relationship, an external entity can easily bring the lubricating oil in the oil storage hole 4 out to the friction surface 1, so that dry friction of the external entity on the friction surface 1 is avoided, and after the lubricating oil in the oil storage hole 4 is partially brought out, a negative pressure is formed at the bottom of the oil storage hole 4, and under the action of the negative pressure at the bottom of the oil storage hole 4 and the adhesion force between the lubricating oil, the lubricating oil in the oil storage hole 4 cannot be completely taken away, so that the lubricating oil can be kept at the oil storage hole 4, and; when the load on the friction surface is large, the method is preferably suitable for the condition that the friction force on the friction surface 1 is positive along the X axis, and compared with the oil storage hole vertical to the friction surface 1 in the depth direction, the oil storage hole 4 in the condition is favorable for generating stronger dynamic pressure effect on the friction surface 1, increasing the oil film pressure on the friction surface 1, avoiding the oil film from breaking under the high load condition and reducing the possibility that the friction surface 1 is subjected to dry friction; therefore, the present embodiment can select a proper friction direction according to different operating conditions, and the oil storage hole 4 of the present embodiment is beneficial to storing lubricating oil, maintaining good lubrication of the friction surface 1, generating a stronger dynamic pressure effect on the friction surface 1, and increasing oil film pressure on the friction surface 1, and is particularly suitable for some friction members subjected to one-way friction for a long time, such as friction members rotating relative to an external entity.
The first grooves 2 and the second grooves 3 are used for guiding lubricating oil to all positions of the friction surface 1 to avoid the condition of large-area oil shortage on the friction surface 1, so the extending and distributing modes of the first grooves 2 and the second grooves 3 can be arranged in various ways, alternatively, the first grooves 2 and the second grooves 3 do not necessarily extend along a straight line direction, for example, the first grooves 2 can be annular grooves, the second grooves 3 can be radial grooves, an external entity rotates clockwise around a fixed axis relative to a friction piece, the fixed axis is the annular center of the first grooves 2, an included angle between a first direction a of the oil storage hole 4 and the opposite direction of the friction force applied to the friction surface 1 is 30 degrees, so when the external entity rotates clockwise around the fixed axis, the external entity can easily bring the lubricating oil in the oil storage hole 4 out to the friction surface 1 to form a stable oil film between the friction surface 1 and the external entity, avoid dry friction between outside entity and the friction part, guarantee that lubricating oil can last to keep between friction part and outside entity, guarantee that lubricating oil can carry out continuous lubrication to between outside entity and the friction part.
Specifically, the direction of the friction force applied to friction elements such as sliding blades, flanges, cylinders, rollers, movable scrolls, fixed scrolls, cross slip rings and the like in the compressor is often in a single direction, for example, the movable scrolls and the fixed scrolls are matched, an oil storage hole 4 is arranged on a friction surface 1 of the fixed scrolls, the movable scrolls and the fixed scrolls are in friction motion around a first axis in a clockwise direction all the time relative to the fixed scrolls, and an included angle between a first direction a of the oil storage hole 4 and the opposite direction of the friction force applied to the friction surface 1 is 30 degrees, so that the oil storage hole 4 can keep lubricating oil between the movable scrolls and the fixed scrolls for a long time, and the lubricating oil in the oil storage hole 4 can be taken out to the position between the friction surfaces 1 of the movable scrolls and the fixed scrolls by the movable scrolls, so that the movable scrolls and the fixed scrolls can keep good lubrication for a long time.
Optionally, the first direction a is at an angle of 30 to 80 ° to the positive X-axis.
Preferably, referring to fig. 5, the friction member further includes a surface hardening layer 5 and a self-lubricating coating 6, the outer surface of the self-lubricating coating 6 is the friction surface 1, when the friction surface 1 of the friction member is treated, the friction surface of the base 8 of the friction member is firstly hardened to obtain the surface hardening layer 5, then the self-lubricating coating 6 is added on the surface hardening layer 5, the outer surface of the self-lubricating coating 6 is the friction surface 1, and finally the oil storage hole 4, the first groove 2 and the second groove 3 are machined on the friction surface 1. The friction surface 1 made of a steel material is hardened by carburizing, nitriding, carbonitriding, or the like, for example.
Specifically, taking a scroll made of an aluminum alloy as an example, firstly, performing ceramic treatment (one type of hardening treatment) on the friction surface 1 of the scroll by using a micro-arc oxidation process or a hard anodic oxidation process to generate a surface hardened layer 5 on the friction surface 1 of the scroll, wherein the thickness of the surface hardened layer 5 is 5 micrometers, then adding a self-lubricating coating 6 on the basis of the surface hardened layer 5 by using a magnetron sputtering or spraying curing manner, wherein the self-lubricating coating 6 specifically comprises a nickel-phosphorus primer and self-lubricating particles 61 such as PTFE, MoS2, WS2 and diamond-like carbon film, and the thickness of the self-lubricating coating 6 is 0.5 micrometers.
Alternatively, the thickness of the surface hardening layer 5 may be 5 to 20 micrometers, preferably the thickness of the surface hardening layer 5 is 5 to 15 micrometers, and the thickness of the self-lubricating coating 6 is 0.5 to 2 micrometers.
Of course, the self-lubricating coating 6 can be added by adopting a method of infiltration treatment and vapor deposition besides the modes of magnetron sputtering and spray curing.
Specifically, the oil hole 4, the first groove 2, and the second groove 3 may be formed by laser processing.
Friction piece, compressor, air conditioner and friction surface processing method embodiment two of friction piece:
referring to fig. 6, in the present embodiment, the oil storage holes 4 are divided into two types, the two types of oil storage holes 4 are a first hole 4a and a second hole 4b, respectively, and the direction from shallow to deep along the first hole 4a is a fourth direction, and the direction from shallow to deep along the second hole 4b is a fifth direction; an included angle between the fourth direction and the negative direction of the X axis is 30 degrees, an included angle between the fifth direction and the positive direction of the X axis is 30 degrees, the friction piece of the embodiment is suitable for parts subjected to reciprocating friction, when the friction force applied to the friction surface 1 is positive along the X axis, the lubricating oil in the first hole 4a is easily brought out to the friction surface 1, and the continuous good lubrication of the friction surface 1 is favorably ensured; the second hole 4b is arranged to facilitate the generation of dynamic pressure effect between the friction surface 1 and an external entity and increase of oil film pressure on the friction surface 1; on the contrary, when the friction force applied to the friction surface 1 is negative along the X axis, the lubricating oil in the second holes 4b is easily carried out to the friction surface 1, and the first holes 4a are beneficial to generating a dynamic pressure effect on the friction surface 1 and increasing the oil film pressure on the friction surface 1; therefore, whether the friction force on the friction surface 1 is along the positive direction of the X axis or along the negative direction of the X axis, the sufficient oil amount on the friction surface 1 can be ensured, the dynamic pressure effect can be generated on the friction surface 1, the oil film pressure on the friction surface 1 can be increased, and the friction piece is convenient to be suitable for different working conditions.
Of course, the oil storage holes 4 may be four, and are divided into a third hole and a fourth hole in addition to the first hole 4a and the second hole 4b, an included angle between the direction from shallow to deep along the third hole and the positive direction of the Y axis is 30 °, an included angle between the direction from shallow to deep along the fourth hole and the negative direction of the Y axis is 30 °, and the oil storage hole 4 is suitable for friction members with more various directions of friction force, for example, the friction members are subjected to both reciprocating friction in the X axis direction and reciprocating friction in the Y axis direction.
Of course, the inclined direction of the oil storage hole 4 may be various, and may be specifically set according to the direction in which the friction surface 1 receives friction force, and it is preferable that the angle between the shallow direction and the deep direction corresponding to the oil storage hole 4 and the opposite direction of the friction force received by the friction surface 1 is 30 ° to 80 °.
The other parts of the second embodiment of the friction surface treatment method of the friction member, the compressor, the air conditioner and the friction member are the same as the first embodiment of the friction surface treatment method of the friction member, the compressor, the air conditioner and the friction member.
Finally, it should be emphasized that the above-described preferred embodiments of the present invention are merely examples of implementations, rather than limitations, and that many variations and modifications of the invention are possible to those skilled in the art, without departing from the spirit and scope of the invention.
Claims (19)
1. A friction member having a friction surface;
the method is characterized in that:
a plurality of oil storage holes are formed in the friction surface, and an included angle between the depth direction of each oil storage hole and the friction surface is an acute angle;
a first groove is formed in the friction surface, and an opening of each oil storage hole is located in the first groove;
the plurality of oil storage holes comprise a plurality of first holes and a plurality of second holes;
the direction from shallow to deep along the first hole is a fourth direction, the direction from shallow to deep along the second hole is a fifth direction, an included angle between each fourth direction and the positive direction of the second direction is an acute angle, an included angle between each fifth direction and the negative direction of the second direction is an acute angle, and the second direction is perpendicular to the normal direction of the friction surface.
2. The friction member as recited in claim 1 wherein:
the included angle between the depth direction of the oil storage hole and the friction surface is 30-80 degrees.
3. The friction member as recited in claim 1 wherein:
the oil storage hole arrays are distributed on the friction surface.
4. The friction member as recited in claim 1 wherein:
the opening of the oil storage hole is circular, the opening diameter of the oil storage hole is 50-400 micrometers, and the distance from the hole bottom of the oil storage hole to the friction surface is 10-200 micrometers.
5. The friction member as recited in claim 1 wherein:
the width of the first trench is 30 to 200 micrometers, and the depth of the first trench is 5 to 100 micrometers.
6. The friction member as recited in claim 1 wherein:
the number of the first grooves is multiple, each first groove is distributed at intervals along a third direction, the interval between every two adjacent first grooves is 100-500 micrometers, the third direction is perpendicular to the normal direction of the friction surface, and the third direction is perpendicular to the extending direction of the first grooves.
7. The friction member as recited in claim 1 wherein:
the friction surface is provided with a plurality of first grooves and a plurality of second grooves, each first groove is intersected with each second groove, and the oil storage holes are distributed at the intersections of the first grooves and the second grooves.
8. The friction member as recited in claim 7 wherein:
the first grooves are distributed at intervals along the extending direction of the second grooves, and the second grooves are distributed at intervals along the extending direction of the first grooves.
9. The friction member as recited in claim 8 wherein:
each adjacent first trench is spaced apart by 100 to 500 microns, and/or each adjacent second trench is spaced apart by 100 to 500 microns.
10. A friction member according to any one of claims 1 to 9, characterized in that:
the direction from shallow to deep along the oil storage hole is the first direction, and the contained angle between each first direction all and the negative direction of second direction is the acute angle, the second direction with the normal direction of friction surface is perpendicular.
11. The friction member as recited in claim 7 wherein:
and the direction from shallow to deep along the oil storage hole is vertical to the extending direction of the second groove.
12. A friction member according to any one of claims 1 to 9, characterized in that:
have surface hardening layer and self-lubricating coating on the friction member, self-lubricating coating covers on the surface hardening layer, self-lubricating coating's surface does friction surface.
13. A compressor, characterized by:
comprising a friction member as claimed in any one of claims 1 to 12.
14. An air conditioner, characterized in that:
comprising a compressor as claimed in claim 13.
15. A method for treating a friction surface of a friction member, comprising:
carrying out surface hardening treatment on the friction surface of the base body of the friction piece to form a surface hardening layer;
adding a self-lubricating coating on the surface hardening layer, wherein the surface of the self-lubricating coating is a friction surface;
a plurality of oil storage holes are processed on the friction surface, and an included angle between the depth direction of each oil storage hole and the friction surface is an acute angle;
the plurality of oil storage holes comprise a plurality of first holes and a plurality of second holes;
the direction from shallow to deep along the first hole is a fourth direction, the direction from shallow to deep along the second hole is a fifth direction, an included angle between each fourth direction and the positive direction of the second direction is an acute angle, an included angle between each fifth direction and the negative direction of the second direction is an acute angle, and the second direction is perpendicular to the normal direction of the friction surface.
16. The friction surface treatment method according to claim 15, characterized in that:
the friction surface is provided with a plurality of first grooves and a plurality of second grooves, each first groove is intersected with each second groove, and the oil storage holes are distributed at each intersection of the first grooves and the second grooves.
17. The friction surface treatment method according to claim 15, characterized in that:
the direction from shallow to deep along the oil storage hole is the first direction, and the contained angle between each first direction all and the negative direction of second direction is the acute angle, the second direction with the normal direction of friction surface is perpendicular.
18. The friction surface treatment method according to claim 15, characterized in that:
the case hardening treatment has a thickness of 5 to 20 μm.
19. The friction surface treatment method according to claim 15, characterized in that:
the self-lubricating coating has a thickness of 0.5 to 2 microns.
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| CN201910522593.0A CN110242575B (en) | 2019-06-17 | 2019-06-17 | Friction piece, compressor, air conditioner and friction surface treatment method |
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| CN112539334A (en) * | 2020-10-27 | 2021-03-23 | 清华大学 | Surface micro-concave texture with dip angle |
| CN112610487A (en) * | 2020-12-03 | 2021-04-06 | 珠海格力节能环保制冷技术研究中心有限公司 | Partition plate structure and compressor |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1377866A (en) * | 1920-05-29 | 1921-05-10 | White Joseph Walwyn | Lubrication of machinery |
| KR20030001500A (en) * | 2001-03-16 | 2003-01-06 | 다이호 고교 가부시키가이샤 | Sliding material |
| JPWO2002077473A1 (en) * | 2001-03-27 | 2004-07-15 | Nok株式会社 | Thrust bearing |
| US6626577B1 (en) * | 2002-04-05 | 2003-09-30 | Sunonwealth Electric Machine Industry Co., Ltd. | Radially inner surface structure of a bearing |
| JP4507642B2 (en) * | 2004-03-05 | 2010-07-21 | 日産自動車株式会社 | Low friction sliding shaft, crankshaft, camshaft, and engine |
| CN201412234Y (en) * | 2009-03-11 | 2010-02-24 | 赵广才 | Oil storage piston in favor of starting lubrication of engine |
| JP5895638B2 (en) * | 2012-03-21 | 2016-03-30 | 大豊工業株式会社 | Plain bearing |
| CN205423544U (en) * | 2016-03-23 | 2016-08-03 | 嘉善佳润轴承有限公司 | Self -lubricating bearing circle suitable for quick unidirectional rotating |
| CN207961278U (en) * | 2018-03-21 | 2018-10-12 | 济南大学 | A kind of compound Surface Texture friction is secondary |
| CN208793186U (en) * | 2018-09-27 | 2019-04-26 | 浙江东禾机电制造有限公司 | A kind of balance block assembly for compressor of air conditioner |
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