Deformation adaptive macromolecule bearing composite material and preparation method and application thereof

A composite material, self-adaptive technology, used in bearing components, shafts and bearings, chemical instruments and methods, etc., can solve the problems of low speed friction coefficient, stick-slip noise, stress concentration bearing damage, etc., to improve wear resistance. , No stick-slip noise, the effect of improving impact resistance

Inactive Publication Date: 2016-11-23
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems in the prior art that the friction layer of the rubber sliding bearing has a large low-speed friction coefficient, stick-slip noise, and the friction layer of the resin sliding bearing cannot adapt to the deformation of the shaft, resulting in damage to the bearing due to stress concentration, and provides a deformation adaptive Polymer bearing composite material and its preparation method and application

Method used

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  • Deformation adaptive macromolecule bearing composite material and preparation method and application thereof
  • Deformation adaptive macromolecule bearing composite material and preparation method and application thereof
  • Deformation adaptive macromolecule bearing composite material and preparation method and application thereof

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preparation example Construction

[0034] A method for preparing a deformation-adaptive polymer bearing composite material, the steps are as follows:

[0035] Step 1. According to the requirements of the above-mentioned elastic middle layer, react isocyanate and polyol to obtain polyurethane prepolymer, then use chain extender to perform chain extension reaction with polyurethane prepolymer to obtain a mixture, and then cast the mixture on fiber reinforced resin composite material and cured at 90-130°C for 1-30 minutes to obtain an elastic middle layer;

[0036] Step 2. According to the requirements of the above friction surface layer, mix isocyanate and lubricant evenly, then react with polyol to obtain polyurethane prepolymer, and then use chain extender to perform chain extension reaction with polyurethane prepolymer to obtain a mixture, and then mix the mixture It is poured onto the elastic middle layer, and cured and molded at 90-130° C. for 1-30 minutes to obtain a friction surface layer, that is, to comp...

Embodiment 1

[0040] Preparation of deformation-adaptive polymer bearing composites:

[0041] Such as figure 1 As shown, 1 mol of polytetrahydrofuran polyol (molecular weight 2000g / mol, average functionality of 2) was reacted with 3 mol of MDI at 70°C for 2h to obtain a prepolymer with a mass percentage of NCO groups of 5.6%, and then Use 1.8mol of 1,4-butanediol to perform chain extension reaction with the prepolymer. The reaction temperature is 40°C and the time is 10 minutes to obtain the mixture. Use a centrifuge to pour the mixture onto the outer wall of the glass fiber reinforced epoxy resin cylinder. , to obtain an elastic middle layer with a hardness of 75 Shore A after curing and molding;

[0042] 0.7mol polycarbonate polyol (molecular weight 2000g / mol, average functionality is 2), 0.3mol polypropylene oxide polyol (molecular weight 400g / mol, average functionality 2) and 76g molybdenum disulfide are mixed uniformly, Then react with 5 mol of TDI at 60°C for 3 hours to obtain a pre...

Embodiment 2

[0044] Preparation of deformation-adaptive polymer bearing composites:

[0045] Such as figure 2 As shown, 1 mol of polycaprolactone polyol (molecular weight 2000g / mol, average functionality of 2.2) was reacted with 2.2 mol of PPDI at 70°C for 3 hours to obtain a prepolymer with a mass percentage of NCO groups of 3.9%. body, and then use 0.80mol of 2-methyl-propylene glycol to carry out chain extension reaction with the prepolymer, the reaction temperature is 70 ° C, and the time is 10 minutes to obtain the mixture, and then the carbon fiber reinforced unsaturated polyester fiber board is placed in the mold, and the centrifuge is used to Machine pours the mixture onto the carbon fiber reinforced unsaturated polyester fiber board, and after curing and molding, an elastic middle layer with a hardness of 80 Shore A is obtained;

[0046] 0.2mol polycarbonate polyol (molecular weight 2000g / mol, average functionality is 2), 0.8mol polytetrahydrofuran ether polyol (molecular weight...

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Abstract

The invention discloses a deformation adaptive macromolecule bearing composite material and a preparation method and application thereof, and belongs to the technical field of sliding bearings. The problems that a rubber sliding bearing friction layer in the prior art is large in low-speed friction coefficient and has stick slip noise, and a resin sliding bearing friction layer cannot adapt to stress concentration and bearing damage caused by shaft deformation are solved. A backing enhancement layer, an elastic middle layer and a friction surface layer are tightly arranged from outside to inside in sequence according to the composite material. The backing enhancement layer is prepared from fiber reinforced resin composite materials, the elastic middle layer is prepared from flexible polyurethane, the hardness value of the elastic middle layer is Shaw 70-85 A, the friction surface layer is prepared from the composite material of rigid polyurethane and lubricating agent, and the hardness value of the friction surface layer is Shaw 50-80 D. The composite material can produce adaptivity for deformation of a shaft, has low water lubrication and dry friction coefficients, produces no stick slip noise under low-speed conditions, and is applicable to being used as the sliding bearing friction layer material.

Description

technical field [0001] The invention relates to a deformation adaptive polymer bearing composite material and a preparation method and application thereof, belonging to the technical field of sliding bearings. Background technique [0002] Sliding bearings refer to bearings that work under sliding friction. Commonly used sliding bearing materials are bearing alloys (also known as Babbitt alloys or white alloys), wear-resistant cast iron, copper-based and aluminum-based alloys, powder metallurgy materials, plastics, rubber, hardwood, carbon graphite, polytetrafluoroethylene (Teflon) Dragon, PTFE), modified polyoxymethylene (POM), etc. Among them, sliding bearings made of polymer materials can be self-lubricating or use water as a lubricant. Compared with traditional metal sliding bearings, they have the advantages of no pollution, low energy consumption, low friction coefficient, and high safety performance. has been widely applied. [0003] The friction layer of polymer s...

Claims

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Application Information

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IPC IPC(8): B32B27/40B32B27/18B32B27/08B32B17/04B32B27/04B32B27/12B32B27/38B32B9/00B32B9/04B32B1/00B32B33/00F16C33/20
CPCB32B27/40B32B1/00B32B27/08B32B27/12B32B27/18B32B33/00B32B2262/101B32B2262/106B32B2307/554F16C33/203F16C33/208
Inventor 郇彦王杰刘佳杨小牛
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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