Three-layer self lubricating abrasion-resistant slide bearing material and preparation method thereof

A sliding bearing and self-lubricating technology, applied in bearing components, shafts and bearings, mechanical equipment, etc., can solve the problems of poor temperature resistance, high load capacity, low friction coefficient, etc. The effect of a low coefficient of friction

Inactive Publication Date: 2010-07-28
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a low friction coefficient, wear resistance, high load bearing, good temperature resistance, good self-lubricating layer and base material bonding performance and its preparation method for the deficiencies of the prior art, to solve

Method used

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  • Three-layer self lubricating abrasion-resistant slide bearing material and preparation method thereof
  • Three-layer self lubricating abrasion-resistant slide bearing material and preparation method thereof
  • Three-layer self lubricating abrasion-resistant slide bearing material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] The clean plain weave Kevlar fabric is immersed in a 45% polytetrafluoroethylene emulsion for several minutes, taken out and dried at 105°C for 10 minutes, and repeated several times until the polytetrafluoroethylene volume fraction reaches 40%. Take another steel plate with tin bronze powder sintered on the surface, apply the above-mentioned PTFE with a brush to paint on the surface of the tin bronze layer, and dry at 105°C. Repeat this painting and drying several times until the PTFE is filled with the tin bronze layer. Pores. Lay the above Kevlar / PTFE composite material flat on the surface of the tin bronze layer impregnated with PTFE, pressurize it to 15MPa at 380°C, vent once every minute within 5 minutes, and keep the temperature and pressure for 15 minutes after 5 minutes , After holding pressure, natural cooling. The obtained material has a friction coefficient of 0.08 and a wear rate of 1.5×10 under a load of 25MPa -6 mm 3 / N·m.

Embodiment 2

[0033] Take the polytetrafluoroethylene emulsion with a mass fraction of 45%, add molybdenum disulfide to make the mass ratio of molybdenum disulfide and polytetrafluoroethylene 1:30, and stir thoroughly. Take the cleaned satin carbon fiber fabric, immerse it in it, take it out and dry it at 105°C for 10 minutes, repeat it several times until the volume fraction of the carbon fiber fabric is 50%. Take another steel plate with tin bronze powder sintered on the surface, apply the above-mentioned polytetrafluoroethylene to the surface of the tin bronze layer with a brush, dry at 105°C, and repeat several times until the polytetrafluoroethylene fills the pores of the tin bronze layer. Place the above-mentioned carbon fiber fabric / PTFE / molybdenum disulfide composite material flat on the surface of the tin bronze layer impregnated with PTFE, pressurize it to 12MPa at 380°C, vent once every minute within 5 minutes, and after 5 minutes Keep heat preservation and pressure for 15 minutes...

Embodiment 3

[0035] Take the clean plain weave carbon fiber fabric and immerse it in concentrated nitric acid for 2h, then wash it with deionized water until it is neutral and dry. Take the polytetrafluoroethylene emulsion with a mass fraction of 60%, immerse the carbon fiber fabric in it, take it out and dry it at 105°C for 10 minutes, and repeat it several times until the volume fraction of the carbon fiber fabric is 55%. Take another steel plate with tin bronze powder sintered on the surface, brush the surface of the tin bronze layer with the above-mentioned polytetrafluoroethylene with a brush, dry at 105°C, and repeat several times until the polytetrafluoroethylene fills the pores of the tin bronze layer. Place the above carbon fiber / PTFE composite material flat on the surface of the tin bronze layer impregnated with PTFE, pressurize to 12MPa at 380°C, deflate once every minute within 5 minutes, and keep the temperature and pressure for 15 minutes after 5 minutes , After holding pressu...

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Abstract

The invention belongs to the technical field of a polymer composite material, in particular to a three-layer self lubricating abrasion-resistant slide bearing material and a preparation method thereof. The composite material consists of three layers, wherein the bottom layer is a steel plate or other metal plates, the middle layer is a porous sintered tin bronze powder layer, fluoropolymers are soaked in holes, and the surface layer is a textile/fluoropolymer composite material. The textile/fluoropolymer composite material is prepared through an emulsion soaking method, and is then glued on the surface of a base material through a hot press forming method. Compared with the prior art, the material of the invention obtains good self lubricating performance, abrasion-resistant performance and temperature-resistant performance through completely introducing the fluoropolymers to be used as gluing resin, and at the same time, the textile/fluoropolymer composite material is perfectly glued on the surface of the base material through the hot press forming method. The material of the invention is applicable to self lubricating bearings in the fields such as aviation, aerospace, machinery, automobiles and the like.

Description

Technical field [0001] The invention belongs to the technical field of polymer composite materials, and specifically relates to a three-layer self-lubricating wear-resistant sliding bearing material and a preparation method thereof. The composite material can be applied to self-lubricating bearings in the fields of aviation, aerospace, machinery, and automobiles. Background technique [0002] In the 1960s, the British Glacier Metal company invented a three-layer composite self-lubricating bearing, called DU bearing, with steel as the substrate, sintered porous tin bronze powder, and then covered with PTFE composite material. Sintered after pressing. This product has been widely used in self-lubricating bearings. Due to the poor wear resistance of PTFE, this product has limited bearing capacity. The thin PTFE layer and intermediate layer on the surface under high load are easy to wear, which seriously affects the service life of the material. [0003] Aramid fabrics (Kevlar, Nome...

Claims

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Application Information

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IPC IPC(8): F16C33/18
Inventor 李同生刘沛吕仁国
Owner FUDAN UNIV
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