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Double-layer composite polymer group wear-resisting bearing and preparation method thereof

A kind of anti-friction bearing, composite technology, applied in the direction of bearing components, shafts and bearings, mechanical equipment, etc., can solve the problems of rubber noise, poor dimensional stability, volume expansion, etc., to improve heat resistance and working temperature, and broaden the damping Temperature range, effect of improving thermoplastic processability

Active Publication Date: 2013-05-15
惠州市中其星科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, single-material polymer bearings also have certain defects
For example, nylon expands in volume after absorbing water, has poor dimensional stability, rubber is easy to cause noise, and has a relatively high friction coefficient with the shaft metal, polyoxymethylene is hard and vibrates, and soft polyurethane molding has low dimensional accuracy, etc.
For this reason, related industries have begun to explore the use of polymer-based composite materials to manufacture bearings. For example, the invention patent 201110060543.9 discloses an elastic-plastic polymer alloy sliding bearing material, which has the characteristics of wear resistance, impact resistance, and high limit PV value. Water-lubricated or self-lubricated non-metallic bearing materials; however, it is difficult to form bearings with high dimensional accuracy at one time using this material, and subsequent machining is required to make the bearings meet the installation requirements

Method used

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  • Double-layer composite polymer group wear-resisting bearing and preparation method thereof
  • Double-layer composite polymer group wear-resisting bearing and preparation method thereof
  • Double-layer composite polymer group wear-resisting bearing and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] (1) Surface treatment of functional fillers: use a plasma activation instrument (plasma cleaning experimental equipment EPT-02, produced by Suzhou Opus Plasma Technology Co., Ltd.; the same below.) to activate aramid fibers and flake-shaped thermally conductive graphite by irradiation powder to clean the surface and activate its surface sites at the same time; dry-treat chopped thermally conductive carbon fibers, flaky thermally conductive graphite powder and nano thermally conductive carbon powder with acetone-dispersed silane coupling agent for 1 hour;

[0030] (2) Preparation of bearing inner layer material: Add 65g of toluene diisocyanate to 35g of polyethylene adipate under nitrogen protection, and react at 70°C for 2 hours to obtain a polyurethane prepolymer; add 55g of polyurethane prepolymer Polymer, 5g aramid fiber, 20g flake thermal graphite powder, 2g butanediol, 2g dibutyltin dilaurate, 10g methyl methacrylate, 10g styrene, 2g dibenzoyl peroxide and 10g dimet...

Embodiment 2

[0035] (1) Surface treatment of functional fillers: use a plasma activator to irradiate and activate aramid fiber and scaly thermally conductive graphite powder to clean the surface and activate its surface sites; dry-treat chopped thermally conductive carbon fiber with acetone-dispersed silane coupling agent , flaky thermal graphite powder and nano thermal conductive carbon powder for 1.5 hours;

[0036] (2) Preparation of bearing inner layer material: Add 60g of toluene diisocyanate to 40g of polyethylene adipate under nitrogen protection, and react at 70°C for 2 hours to obtain a polyurethane prepolymer; add 55g of polyurethane prepolymer Polymer, 5g aramid fiber, 20g flake thermal graphite powder, 2g butanediol, 2g dibutyltin dilaurate, 10g methyl methacrylate, 10g styrene, 2g dibenzoyl peroxide and 10g dimethyl Mix the aniline evenly, seal it and place it in a constant temperature box at 25°C for 24 hours, then cure it at 100°C for 6 hours, and keep it under reduced press...

Embodiment 3

[0041] (1) Surface treatment of functional fillers: use a plasma activator to irradiate and activate aramid fiber and scaly thermally conductive graphite powder to clean the surface and activate its surface sites; dry-treat chopped thermally conductive carbon fiber with acetone-dispersed silane coupling agent , flaky heat-conducting graphite powder and nano-scale heat-conducting carbon powder for 2 hours;

[0042] (2) Preparation of bearing inner layer material: Add 55g of toluene diisocyanate to 45g of polyethylene adipate under nitrogen protection, and react at 70°C for 2 hours to obtain a polyurethane prepolymer; add 55g of polyurethane prepolymer Polymer, 5g aramid fiber, 20g flake thermal graphite powder, 2g butanediol, 2g dibutyltin dilaurate, 10g methyl methacrylate, 10g styrene, 2g dibenzoyl peroxide and 10g dimethyl Mix the aniline evenly, seal it and place it in a constant temperature box at 25°C for 24 hours, then cure it at 100°C for 6 hours, and keep it under redu...

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Abstract

The invention discloses a double-layer composite polymer group wear-resisting bearing and a preparation method thereof. According to the invention, a polyurethane group interpenetrating network alloy heat-conducting wear-resisting material is adopted as an inner-layer material, polypropylene group high-rigidity heat-conducting composite material is adopted as an outer-layer material, the inner-layer material and the outer-layer material of the bearing are subjected to extrusion molding together by a double-layer plastic pipe extruding molding unit, then cut mechanically, thus obtaining the double-layer composite polymer group wear-resisting bearing. In the invention, polymethyl methacrylate and polystyrene are adopted as alloy phase, the thermoplastic deformability of the material is effectively improved; the interpenetrating networks formed by polyurethane, polymethyl methacrylate and polystyrene, so that the damping temperature range of the alloy can be widened, the heat generated by friction between a shaft and the bearing can be conducted away as soon as possible, and the heat resistance and working temperature of the bearing are improved. The prepared double-layer composite polymer group wear-resisting bearing has the advantages of light weight, low cost, high accuracy, long service life and the like, is wear-resisting and can be used for replacing traditional bearing made of metal in the industries of shipping, hydroelectricity, wind power, wave power generation and the like.

Description

technical field [0001] The invention belongs to the technical field of bearing preparation, in particular to a double-layer composite polymer-based wear-resistant bearing and a preparation method thereof. Background technique [0002] Many equipment in industries such as ships, pumps, hydropower, wind power and wave power contain sliding bearing parts, which are currently mostly made of metal materials. In practical applications, people have gradually discovered that metal bearings have problems such as heavy weight, strong vibration, loud noise, heavy wear, severe corrosion, short life, and high cost. Because of the light weight and corrosion resistance of polymer materials, polymer bearings have been initially applied to these fields. The main materials include nylon, rubber, polyoxymethylene, polytetrafluoroethylene, polyetheretherketone and polyurethane. However, the polymer bearing of a single material also has certain defects. For example, nylon expands in volume aft...

Claims

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Application Information

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IPC IPC(8): F16C33/04C08L75/06C08L33/12C08L25/06C08G18/42C08G18/10C08K9/06C08K3/04C08L23/14C08L51/06C08K7/06
Inventor 林志丹李卫徐保峰
Owner 惠州市中其星科技有限公司
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