Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing carbon fiber fabrics friction material used for wet clutch and application thereof

A technology of wet clutches and friction materials, which is applied in the direction of friction linings and mechanical equipment, can solve problems such as poor stability of friction coefficient, complex production process, and shedding of friction material layers, and achieve improved friction and wear performance, simple process steps, and easy operation convenient effect

Inactive Publication Date: 2012-02-08
CENT SOUTH UNIV
View PDF6 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former is used in the high-power field, but the static and dynamic friction coefficients of this friction material differ greatly, and the dynamic friction coefficient is usually below 0.08, resulting in poor clutch instant stability. In the frequent clutch process, the friction coefficient stability is poor, and the production process is relatively complicated. ; Although the latter has a relatively close dynamic and static friction coefficient, and the dynamic friction coefficient can reach about 0.12, but due to the low strength of the material, it is generally used in small or medium loads, and it is difficult to apply to heavy load clutches.
The strength of carbon fiber cloth is greater than that of paper base, but the bonding strength between fiber cloth layers is still low. If the connection between layers is not good, the layer of friction material will fall off

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] First, set the density to 1.3g / cm 3 The carbon fiber is woven into carbon fiber cloth in three dimensions, and the binder is applied to both sides of the carbon fiber cloth, and the cloth layer is superimposed according to the required thickness and punctured with carbon fiber to form a whole. Then the punctures are placed in an impregnation furnace as a whole, and impregnated with 10% SiO at a temperature of 350°C and a vacuum of -0.15MPa. 2 , 10% ZrO 2 of phenolic resin. After that, the impregnated cloth was cured under pressure at 250°C and 12MPa. Apply high temperature resistant friction material adhesive and bond with the support steel back, pressurize 1.2MPa, heat bond at 250°C for 5 minutes. Tested with MM-1000 testing machine, pressure 2MPa, speed 7000r / min, dual 65Mn (HRC39), the measured dynamic friction coefficient in lubricating oil is 0.13-0.15, the static friction coefficient is 0.17, the friction coefficient stability is ≥0.95, and the wear is less tha...

Embodiment 2

[0027] Other steps are the same as in Example 1, except that the friction agent contained in the resin is changed into 5% ferroboron, 5% ferromanganese, and 5% ferrochrome, and the same dynamic friction coefficient is 0.12~0.13, and the static friction coefficient is 0.16. Stability ≥ 0.95, wear less than 1×10 -9 cm 3 / J.

Embodiment 3

[0029] Set the density to 1.3g / cm 3 The carbon fiber is woven and punctured into a carbon fiber cloth of the required thickness, and the punctured cloth is directly impregnated with 10% SiO in a vacuum impregnation furnace 2 , 10% ZrO 2 The phenolic resin, the impregnation temperature is 350 ℃, the vacuum degree is -0.2MPa. Afterwards, heat-cure the impregnated cloth at 300°C and a pressure of 12MPa, apply a high-temperature-resistant friction material adhesive and bond it to the supporting steel back, pressurize at 1.2MPa, and heat-bond at 250°C for 5 minutes. The obtained practical friction plate has a dynamic friction coefficient of 0.12 to 0.15 in lubricating oil, a static friction coefficient of 0.18, and a wear of 3×10 -9 cm 3 / J, friction coefficient stability ≥ 0.95, dual wear 1×10 -9 cm 3 / J.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
densityaaaaaaaaaa
densityaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention relates a method for preparing a carbon fiber fabrics friction material used for a wet clutch and an application thereof, which comprises the following steps: 1), 3D braiding carbon felt or carbon fiber and puncturing to carbon fiber fabrics as a preform; 2), dipping the preform into a soaker, wherein the soaker comprises high temperature resistance brake sheet phenol resin containing a rubbing agent with one or more from SiO2, ZrO2, boron iron, manganese iron and chromium iron, controlling the concentration of the dipped perform at 1.68g / cm<3>-2g / cm<3> by controlling the dipping pressure or controlling the addition of high temperature resistance brake sheet phenol resin; 3), pressurizing and thermocuring the dipped preform which is impregnated cloth; 4) punching the processed impregnated cloth into a required shape, coating a binder on one surface of the impregnated cloth and performing a heat bonding with a support steel back. The method for preparing the carbon fiber fabrics friction material used for the wet clutch and the application are capable of raising the friction and wear performance of the wet carbon fiber fabrics and conveying large torsional moment. According to the invention, the obtained friction material still has good friction and wear performance even if the friction material is thinned.

Description

technical field [0001] The invention relates to a preparation method and application of a carbon fiber cloth base or carbon felt base friction material used in a wet clutch. Background technique [0002] The friction materials currently used in wet clutches are mainly metal-based friction materials produced by powder metallurgy or paper-based friction materials produced by papermaking. The former is used in the high-power field, but the static and dynamic friction coefficients of this friction material differ greatly, and the dynamic friction coefficient is usually below 0.08, resulting in poor clutch instant stability. In the frequent clutch process, the friction coefficient stability is poor, and the production process is relatively complicated. ; Although the latter has a relatively close dynamic and static friction coefficient, and the dynamic friction coefficient can reach about 0.12, but due to the low strength of the material, it is generally used in small or medium l...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/50F16D69/00
Inventor 张兆森徐慧宋招权严深浪
Owner CENT SOUTH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com