A high performance composite material sliding bearing and preparation method thereof

Abstract

The present invention provides a high-performance composite material sliding bearing and a preparation method thereof. The present invention comprises a substrate, a connecting layer and a composite layer; the substrate is made of a metal material; the connecting layer comprises a copper mesh-copper skin composite connecting structure, the copper mesh-copper skin composite connecting structure comprises a copper skin interlayer and a copper mesh, the copper mesh is connected to the composite layer formed by the composite material, and the other side of the copper mesh-copper skin composite connecting structure is fixedly connected to the substrate. The present invention adopts a copper mesh-copper skin composite connecting structure, and the middle copper skin interlayer can prevent the composite material of the composite layer from leaking. This connection method effectively enhances the overall rigidity of the metal-plastic composite material and has good dimensional stability.

Description

Technical Field

[0001] The present invention relates to the technical field of bearings, and in particular to a high-performance composite material sliding bearing and a preparation method thereof. Background Art

[0002] At present, the manufacturing of modified polytetrafluoroethylene sliding bearings usually adopts a three-layer composite structure, which combines the resin and the metal together through an intermediate connecting layer. Especially for the current elastic metal plastic bearings, the bearings are made by pressing metal wire pads, cold pressing resin and hot forming. However, the production process of the metal wire pads in this method is relatively cumbersome, and the biggest disadvantage is that it cannot achieve continuous production, resulting in a slow time rhythm and large differences in monomers.

[0003] There are many structures of composite bearings formed by metal and polyaryletherketone engineering plastics, such as the PEEK composite sliding bearing disclosed in the Chinese patent CN2886176Y. The steel is used as the base material, a copper powder layer is sintered on the surface, and then the PEEK material and the copper powder layer are sintered. The sliding bearing made by this method has better performance than the existing polytetrafluoroethylene sliding bearing, and is widely used to meet different structural design requirements. However, the surface flatness, density uniformity and porosity of the copper powder in this structure after sintering cannot reach the ideal state.

[0004] The prior art also discloses a metal-plastic composite material bearing, in which a copper mesh skeleton is formed by sintering a stacked multi-layer copper mesh, and then an engineering plastic is spread on the surface of the copper mesh skeleton, and then a laminated copper mesh plastic composite material is formed by molding, sintering and plasticizing, and then the copper mesh plastic composite material is cut, rolled or brazed with a steel tile base to form different bearings. However, when the metal skeleton and the engineering plastic are composited in the composite structure, the gaps in the metal skeleton are filled with engineering plastic, which reduces the brazing quality when welded to the steel matrix, thereby reducing the bonding strength between the copper mesh plastic composite material and the steel matrix. Summary of the invention

[0005] According to the technical problems raised above, a high-performance composite sliding bearing is provided which is resistant to high temperature, has good self-lubricating performance and good weather resistance, can be used in harsh environments such as no lubrication, low speed and heavy load conditions or in liquid, solid dust pollution, etc., and is suitable for hydropower, wind power, gearboxes and military industries. The technical means adopted by the present invention are as follows:

[0006] A high-performance composite material sliding bearing, comprising a matrix, a connecting layer and a composite layer;

[0007] The substrate is made of metal material;

[0008] The connecting layer comprises a copper mesh-copper skin composite connecting structure, which comprises a copper skin interlayer and a copper mesh. The copper mesh is connected to the composite layer formed by the composite material, and the other side of the copper mesh-copper skin composite connecting structure is fixedly connected to the substrate.

[0009] Further, the copper mesh-copper skin composite connection structure is a copper mesh-copper skin double-sided structure or a copper mesh-copper skin single-sided structure. The copper mesh-copper skin single-sided structure is a laminated copper mesh woven on one side of the two sides of the copper skin, and the copper mesh-copper skin double-sided structure is a laminated copper mesh woven on both sides of the copper skin.

[0010] Copper meshes are provided on both sides of the copper skin interlayer of the copper mesh-copper skin double-sided structure, the top end of the upper copper mesh is connected to the composite layer, and the bottom end of the lower copper mesh is brazed and connected to the substrate;

[0011] A copper mesh is arranged on one side of the copper skin interlayer of the copper mesh-copper skin single-side structure, the top of the upper copper mesh is connected to the composite layer, and the bottom of the lower copper skin is connected to the substrate by brazing.

[0012] Furthermore, the copper mesh is a laminated copper mesh, that is, it is woven by stacking multiple layers of copper mesh, the adjacent copper meshes have the same or different materials and mesh counts, and the copper meshes on both sides of the copper sheet have the same or different materials, mesh counts, and layers.

[0013] Furthermore, the copper mesh is a tin bronze mesh or a brass mesh, and the copper sheet is a tin bronze sheet or a tin-phosphorus copper sheet or a beryllium bronze sheet.

[0014] Furthermore, the diameter of the copper mesh is 0.1 mm to 0.5 mm, the mesh size is 20 mesh to 100 mesh, and the thickness of the copper sheet is 0.05 mm to 0.2 mm.

[0015] Furthermore, the laminated copper mesh comprises 1 to 4 layers of the copper mesh stacked together, and the longitude and latitude directions of two adjacent layers of the copper mesh are staggered by 0° to 90°.

[0016] Furthermore, the copper mesh has three layers, including a 60-mesh tin-bronze skin bottom layer, a 20-mesh tin-bronze skin layer and a 60-mesh tin-bronze skin layer stacked on the tin-bronze skin bottom layer.

[0017] The present invention also discloses a method for preparing the above-mentioned high-performance composite material sliding bearing, comprising the following steps:

[0018] Step 1: Pretreatment of copper mesh and copper sheet, mainly including cutting of copper mesh and copper sheet and surface treatment of copper mesh and copper sheet after cutting;

[0019] Step 2: Place a preset number of layers of copper mesh at a preset position on the copper sheet, place the whole in a gas-protected chain sintering furnace, set the sintering temperature to the diffusion temperature of the copper mesh, and sinter according to conventional sintering technology, wherein the sintering temperature is 930-980°C and the rotation speed is 5-15r / min;

[0020] Step 3: Level the sintered copper mesh-copper skin composite connection structure and cut it into the required size;

[0021] Step 4: Compounding the high-performance composite material with the copper mesh-copper skin composite structure according to the existing compression molding or injection molding process;

[0022] Step 5: The composite structure obtained in step 4 is tinned and then brazed together with steel bases of different geometric shapes, and then machined into thrust bearings of different specifications.

[0023] Furthermore, in the step 2, the bottom of the copper mesh-copper skin composite connection structure is placed on a graphite plate with a thickness of 20-40 mm, and another graphite plate is placed on the top copper mesh.

[0024] Furthermore, the high-performance composite material includes powder or plate of modified polytetrafluoroethylene and powder or plate of modified polyaryletherketone material.

[0025] The present invention adopts a copper mesh-copper sheet composite connection structure, and the middle copper sheet interlayer can prevent the composite layer from leaking. This connection method effectively enhances the overall rigidity of the metal-plastic composite material and has good dimensional stability. The present invention can save raw materials, reduce product processing volume, and save raw material costs on the basis of the existing technology. On the basis of this patent, it is more convenient for the whole process of automated continuous production operations and reduces labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 It is a schematic structural diagram of the first embodiment of the high-performance composite sliding bearing of the present invention.

[0028] In the figure: 1, substrate; 21, copper skin; 22, first type copper mesh; 23, second type copper mesh; 3, composite layer. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] like Figure 1 As shown, the embodiment of the present invention discloses a high-performance composite material sliding bearing, including: a matrix, a connecting layer and a composite layer;

[0031] The base 1 is made of metal material. In this embodiment, the base is a steel tile base made of steel.

[0032] The connecting layer includes a copper mesh-copper skin composite connecting structure, the copper mesh-copper skin composite connecting structure includes a copper skin 21 interlayer and a copper mesh, the copper mesh is connected to the composite layer 3 formed by a composite material, the other side of the copper mesh-copper skin composite connecting structure is fixedly connected to the substrate, specifically connected to the steel tile base by brazing, the composite layer has a high-performance resin composite material as the surface working layer, specifically, the copper mesh-copper skin composite connecting structure is filled with high-performance composite materials, and a resin engineering plastic layer is formed on the copper mesh side surface of the copper mesh-copper skin composite connecting structure.

[0033] The copper mesh-copper skin composite connection structure is a copper mesh-copper skin double-sided structure or a copper mesh-copper skin single-sided structure. The copper mesh-copper skin single-sided structure is a laminated copper mesh woven on one side of the two sides of the copper skin, and the copper mesh-copper skin double-sided structure is a laminated copper mesh woven on both sides of the copper skin.

[0034] Copper meshes are provided on both sides of the copper skin interlayer of the copper mesh-copper skin double-sided structure, the top end of the upper copper mesh is connected to the composite layer, and the bottom end of the lower copper mesh is brazed and connected to the substrate;

[0035] A copper mesh is arranged on one side of the copper skin interlayer of the copper mesh-copper skin single-side structure, the top of the upper copper mesh is connected to the composite layer, and the bottom of the lower copper skin is connected to the substrate by brazing.

[0036] The copper mesh is a laminated copper mesh, that is, it is woven by stacking multiple layers of copper meshes, and the adjacent copper meshes have the same or different materials and mesh counts, and the copper meshes on both sides of the copper sheet have the same or different materials, mesh counts, and layers.

[0037] The copper mesh is a tin bronze mesh or a brass mesh, so that the copper mesh has good rigidity and wear resistance. The copper skin is a tin bronze skin or a tin-phosphorus copper skin or a beryllium bronze skin.

[0038] The copper mesh has a diameter of 0.1 mm to 0.5 mm, a mesh size of 20 to 100 meshes, and a copper sheet thickness of 0.05 mm to 0.2 mm, preferably 0.05-0.15 mm. The appropriate mesh size can be well sintered and bonded with the copper sheet, improve the rigidity of the copper mesh, and facilitate filling of engineering plastics and tinning soldering.

[0039] The laminated copper mesh comprises 1 to 4 layers of the copper mesh stacked together, and the warp and weft directions of the two adjacent layers of the copper mesh are staggered by 0° to 90°, so that the meshes on the two adjacent layers of copper mesh, i.e., the first type of copper mesh 21 and the second type of copper mesh 22, are staggered with each other, so that the rigidity of the copper mesh after stacking can be further improved and the porosity can be increased. The multi-layer copper mesh can be made of copper mesh woven with tin bronze wire or brass wire, or a laminated copper mesh woven with 1 to 2 layers of tin bronze mesh or brass mesh. The mesh number of the copper mesh of the lower layer (close to the copper skin) is generally 40 to 100 meshes, and the mesh number of the 2 to 4 layers of copper mesh is generally 20 to 60 meshes. More preferably, the warp and weft directions of the two adjacent layers of copper mesh are staggered by 45°. Thereby, the meshes on the copper meshes on the adjacent two sides are evenly staggered with each other, so that the performance of the copper mesh is more uniform.

[0040] As a preferred embodiment, the copper mesh has three layers, including a 60-mesh tin-bronze bottom layer, a 20-mesh tin-bronze layer and a 60-mesh tin-bronze layer stacked on the tin-bronze bottom layer.

[0041] The present invention adopts a copper mesh-copper skin composite connection structure, and fills the copper mesh with high-performance composite materials. The copper mesh and the high-performance composite materials are tightly connected by compression molding or injection molding, and the intermediate copper skin interlayer can prevent the leakage of the high-performance composite materials. The copper mesh is brazed and connected with the steel substrate after tinning. The sintering of the copper mesh and the copper skin effectively improves the bonding strength of the copper mesh-copper skin structure. This connection method effectively enhances the overall rigidity of the metal-plastic composite material and has good dimensional stability. The stacking of multiple layers of copper mesh and the filling of engineering plastics in the copper mesh skeleton effectively enhance the overall rigidity of the copper mesh plastic composite material. When the copper mesh or copper skin is brazed with the steel substrate, the amount of brazing material used is reduced, which not only reduces the process cost, but also saves environmental protection. The high-performance composite material is resistant to high temperature, radiation, good self-lubricating performance, and good weather resistance. It can be used under no-lubrication, low-speed and heavy-load conditions or in harsh environments such as liquid and solid dust pollution. It is suitable for fields such as wind power, gearboxes and military industry.

[0042] The present invention also discloses a method for preparing the above-mentioned high-performance composite material sliding bearing, comprising the following steps:

[0043] Step 1: Pretreatment of copper mesh and copper sheet, mainly including cutting of copper mesh and copper sheet and surface treatment of copper mesh and copper sheet after cutting;

[0044] Step 2: Place a preset number of layers of copper mesh at a preset position on the copper sheet, place the whole in a gas-protected chain sintering furnace, set the sintering temperature to the diffusion temperature of the copper mesh, and sinter according to conventional sintering technology, wherein the sintering temperature is 930-980°C and the rotation speed is 5-15r / min;

[0045] Step 3: Level the sintered copper mesh-copper skin composite connection structure and cut it into the required size;

[0046] Step 4: Compounding the high-performance composite material with the copper mesh-copper skin composite structure according to the existing compression molding or injection molding process;

[0047] Step 5: The composite structure obtained in step 4 is tinned and then brazed together with steel bases of different geometric shapes, and then machined into thrust bearings of different specifications.

[0048] Example 1

[0049] In this embodiment, a copper mesh-copper skin double-sided structure, a three-layer copper mesh, and a modified polyaryletherketone material powder are molded, and the formed composite layer is connected to the steel tile base by brazing to form a high-performance composite material bearing, which specifically includes the following steps:

[0050] Step 1: Cut copper mesh and copper sheet. Cut the tin bronze sheet with a thickness of 0.05mm into sheets; cut the tin bronze mesh with a mesh size of 60 into sheets in the direction of the warp and weft; cut the tin bronze mesh with a mesh size of 20 into sheets in the direction staggered at 45° with the warp and weft. Due to the different cutting directions, the warp and weft directions of the stacked copper meshes are staggered.

[0051] Step 2: Processing the cut copper mesh and copper skin mainly includes leveling and removing surface oil stains to prepare for sintering.

[0052] Step 3: Place the copper sheet and copper mesh in position. The tin bronze mesh with a mesh size of 60 and a mesh diameter of 0.1mm is near the two sides of the copper sheet. The middle copper mesh is a tin bronze mesh with a mesh size of 20 and a mesh size of 45° to the longitude and latitude. The outermost layer is a tin bronze mesh with a mesh size of 60. Place the laminated copper mesh and copper sheet on a graphite plate with a thickness of 20~40mm, and then place another graphite plate on the top copper mesh. Then place the whole in a gas-protected chain sintering furnace. The sintering temperature is set to the diffusion temperature of the copper mesh, and sintering is performed according to conventional sintering process technology. Placing the copper mesh on the graphite plate can prevent the bottom copper mesh from directly contacting the furnace, thereby preventing friction between the furnace and the copper mesh during the placement and removal of the copper mesh, making it easier for the workpiece to enter and exit the furnace, and making the entire copper mesh more evenly heated. A graphite plate is placed on the top copper mesh to exert a certain pressure on the copper mesh to prevent the copper skin and the copper mesh from warping during the sintering process. The parameters during the sintering process are: sintering temperature is 930~980℃, and the rotation speed is 5~15r / min.

[0053] Step 4: Level the sintered copper mesh-copper skin structure and cut it into the required size to be compounded with the modified polyaryletherketone material.

[0054] Step 5: Compounding and pressing. Choose a suitable mold, place a certain amount of modified polyaryletherketone material powder in the mold, then gently place the copper mesh-copper skin composite structure on it, and use pressure equipment to press mold it. The molding pressure is 50MPa, and the thickness of the modified polyaryletherketone material layer is about 1~4mm.

[0055] Step 6: Compression molding: Compression molding is performed according to conventional existing process technology.

[0056] Step 7: Brazing and cladding. The composite layer is tinned and brazed together with steel bases of different geometric shapes, and then machined into thrust bearings of different specifications.

[0057] Example 2

[0058] In this embodiment, a copper mesh-copper skin double-sided structure, two layers of copper mesh, and a composite material of modified polytetrafluoroethylene powder are used as an example, and the following steps are specifically included:

[0059] Step 1: Cut copper sheets and copper meshes. Cut the tin-phosphorus copper sheets with a thickness of 0.15 mm into sheets; cut the brass mesh with a mesh size of 60 into sheets in the direction of the warp and weft; cut the tin-bronze mesh with a mesh size of 20 into sheets in the direction staggered at 45° with the warp and weft.

[0060] Step 2: Process the cut copper sheet and copper mesh, mainly including leveling the copper sheet and copper mesh and removing oil stains on the surface of the copper sheet and copper mesh.

[0061] Step 3: Place the copper sheet and copper mesh in position. The brass mesh with a mesh size of 60 and a mesh diameter of 0.3mm is near the two sides of the copper sheet, and the outer layer is a 20-mesh tin bronze mesh at 45° to the longitude and latitude. Place the laminated copper mesh and copper sheet on a graphite plate with a thickness of 20-40mm, and then place another graphite plate on the top copper mesh. Then place the whole in a gas-protected chain sintering furnace. The sintering temperature is set to the diffusion temperature of the copper mesh, and sintering is performed according to conventional sintering process technology.

[0062] Step 4: Level the sintered copper mesh-copper skin double-sided structure and cut it into the required size to be compounded with the modified polytetrafluoroethylene material.

[0063] Step 5: Compounding and pressing. Choose a suitable mold, place a certain amount of modified polytetrafluoroethylene powder in the mold, then gently place the copper mesh-copper skin composite structure on it, and use pressure equipment to press and mold. The molding pressure is 50MPa, and the thickness of the modified polytetrafluoroethylene material layer is about 1~4mm.

[0064] Step 6: Sintering and plasticizing. The pressed composite sheet is placed in a gas protection furnace or a vacuum furnace, and sintered and plasticized under gas protection or vacuum conditions according to conventional existing process technology for modified polytetrafluoroethylene to form a composite layer.

[0065] Step 7: Leveling: Level the composite layer according to existing process technology.

[0066] Step 7: Brazing and cladding. The composite layer is tinned and brazed together with steel bases of different geometric shapes, and then machined into thrust bearings of different specifications.

[0067] Example 3

[0068] In this embodiment, a copper mesh-copper skin single-side structure, two layers of copper mesh, and a composite material of a modified polyaryletherketone sheet are used as an example. The production of the bearing of the third embodiment specifically includes the following steps:

[0069] Step 1: Cut copper sheet and copper mesh. Cut the copper sheet with a thickness of 0.2mm to the required size; cut the tin bronze mesh with a mesh size of 100 into strips in the direction of the warp and weft; cut the tin bronze mesh with a mesh size of 60 into sheets in the direction of 45° staggered with the warp and weft.

[0070] Step 2: Process the cut copper sheet and copper mesh, mainly including leveling the strip copper mesh and removing oil stains on the surface of the copper mesh to prepare for sintering.

[0071] Step 3: Place the copper sheet and copper mesh in position. The tin bronze mesh with a mesh size of 100 and a mesh diameter of 0.3mm is near the two sides of the copper sheet, and the outer layer is a tin bronze mesh with a mesh size of 60 at an angle of 45° to the longitude and latitude. Place the laminated copper mesh and copper sheet on a graphite plate with a thickness of 20-40mm, and then place another graphite plate on the top copper mesh. Then place the whole in a gas-protected chain sintering furnace. The sintering temperature is set to the diffusion temperature of the copper mesh, and sintering is performed according to conventional sintering process technology.

[0072] Step 4: Level the sintered copper mesh-copper skin single-side structure and cut it into the required size to be compounded with the modified polyaryletherketone material.

[0073] Step 5: Compounding and pressing. Choose a suitable mold, place a certain amount of modified polyaryletherketone sheet in the mold, and then gently place the copper mesh-copper skin single-sided structure on it, and use pressure equipment to press mold, the molding pressure is 50MPa, and the thickness of the composite material layer of high-performance composite materials is about 1~4mm.

[0074] Step 6: Compression molding: Compression molding is performed according to conventional existing process technology.

[0075] Step 7: Brazing and cladding. The copper sheet is tinned and brazed together with steel bases of different geometric shapes, and then machined into thrust bearings of different specifications.

[0076] Example 4

[0077] The overall technical solution of this embodiment is the same as that of the above-mentioned embodiments 1 to 3, except that the molding steps in steps five and six are replaced by existing injection molding steps.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-performance composite sliding bearing, characterized in that: It includes a substrate, a connecting layer and a composite layer; The substrate is made of metal material; The connecting layer comprises a copper mesh-copper skin composite connecting structure, the copper mesh-copper skin composite connecting structure comprises a copper skin interlayer and a copper mesh, the copper mesh is connected to the composite layer formed by the composite material, and the other side of the copper mesh-copper skin composite connecting structure is fixedly connected to the substrate; The copper mesh-copper skin composite connection structure is a copper mesh-copper skin double-sided structure, and the copper mesh-copper skin double-sided structure is a copper mesh woven on both sides of the copper skin; Copper meshes are provided on both sides of the copper skin interlayer of the copper mesh-copper skin double-sided structure, the top end of the upper copper mesh is connected to the composite layer, and the bottom end of the lower copper mesh is brazed and connected to the substrate; The copper sheet has a thickness of 0.15 mm to 0.2 mm; The copper mesh and the high-performance composite material are tightly connected through compression molding or injection molding, and the copper skin interlayer can prevent the high-performance composite material from leaking.

2. The high performance composite sliding bearing according to claim 1, characterized in that: The copper mesh is a laminated copper mesh, which is woven by stacking multiple layers of copper meshes. Adjacent copper meshes have the same or different materials and mesh counts, and the copper meshes on both sides of the copper sheet have the same or different materials, mesh counts, and layers.

3. The high performance composite sliding bearing according to claim 1, characterized in that: The copper mesh is a tin bronze mesh or a brass mesh, and the copper sheet is a tin bronze sheet or a tin-phosphorus copper sheet or a beryllium bronze sheet.

4. The high performance composite sliding bearing according to claim 1, characterized in that: The copper mesh has a diameter of 0.1 mm to 0.5 mm and a mesh number of 20 to 100 meshes.

5. The high performance composite sliding bearing according to claim 2, characterized in that: The laminated copper mesh comprises 2 to 4 layers of the copper mesh stacked together, and the longitude and latitude directions of two adjacent layers of the copper mesh are staggered by 0° to 90°.

6. The high performance composite sliding bearing according to claim 5, characterized in that: The copper mesh has three layers, including a 60-mesh tin bronze mesh bottom layer, a 20-mesh tin bronze mesh and a 60-mesh tin bronze mesh stacked on the tin bronze mesh bottom layer.

7. A method for preparing a high-performance composite sliding bearing according to any one of claims 1 to 6, characterized in that: The steps include: Step 1: Pretreatment of copper mesh and copper sheet, mainly including cutting of copper mesh and copper sheet and surface treatment of copper mesh and copper sheet after cutting; Step 2: Place a preset number of layers of copper mesh at a preset position on the copper sheet, place the whole in a gas-protected chain sintering furnace, set the sintering temperature to the diffusion temperature of the copper mesh, and sinter according to conventional sintering technology, wherein the sintering temperature is 930-980°C and the rotation speed is 5-15r / min; Step 3: Level the sintered copper mesh-copper skin composite connection structure and cut it into the required size; Step 4: Compounding the high-performance composite material with the copper mesh-copper skin composite connection structure by a compression molding or injection molding process; Step 5: The composite structure obtained in step 4 is tinned and then brazed together with steel bases of different geometric shapes, and then machined into thrust bearings of different specifications.

8. The high performance composite sliding bearing according to claim 7, characterized in that: In the step 2, the bottom of the copper mesh-copper skin composite connection structure is placed on a graphite plate with a thickness of 20-40 mm, and another graphite plate is placed on the top copper mesh.

9. The high performance composite sliding bearing according to claim 7, characterized in that: The high-performance composite material comprises powder or plate of modified polytetrafluoroethylene and modified polyaryletherketone materials.

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