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Friction materials for high-speed train braking and method for preparing same

A friction material, high-speed train technology, applied in the direction of friction lining, mechanical equipment, etc., can solve the problems of poor wear resistance, friction performance decline, performance decline, etc., to achieve simple process, reduce high temperature performance decline, improve synergy. Effect

Inactive Publication Date: 2009-01-21
SHANGHAI PEIMENG MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In 1998, my country's railway transportation speed increased to 160km / h. In the future, the running speed of my country's high-speed trains can be higher than 200km / h. However, the friction materials produced by my country have poor temperature resistance and serious performance degradation under high-speed braking. shortcoming
Chinese patents CN1690467A and CN1670113A disclose friction materials used in vehicles such as automobiles. The reinforcing agents used in these materials are various organic fibers, the matrix is ​​styrene-butadiene rubber or phenolic resin, and various friction-increasing agents, reducing Inorganic fillers such as abrasives, but the overall performance of the material is not ideal, and the wear resistance and temperature resistance cannot meet the operating conditions of high-speed and high-load high-speed trains
Chinese patent CN1206080A, world patent W08909889, DE4135389, etc. reported that the reinforcing agent of train friction material is also various fibers, and its matrix is ​​thermoplastic / thermosetting phenolic resin, rubber or rubber-plastic blending system, and silicates are added. A variety of inorganic fillers, but this type of friction material still has problems such as poor wear resistance and serious degradation of friction performance at high temperatures

Method used

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  • Friction materials for high-speed train braking and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1, its component and parts by weight proportioning are:

[0019] 7 parts of styrene-butadiene rubber; 1 part of ferric oxide

[0020] 0.2 parts of rubber compounding agent; 0.3 parts of titanium dioxide

[0021] 8 parts of thermosetting phenolic resin; 0.3 parts of rare earth oxide of praseodymium and neodymium

[0022] 40 parts of friction powder; 0.3 parts of calcium fluoride

[0023] 10 parts of steel fiber; 1.0 parts of melamine cyanurate

[0024] Concrete preparation process steps are as follows:

[0025] 1) Weigh the raw materials according to the formula;

[0026] 2) Preparation of molding material: use an open mill for mastic refining of styrene-butadiene rubber, add rubber compounding agent after refining, and then add thermosetting phenolic resin for mixing; after mixing evenly, add friction powder, steel fiber, and ferric oxide , titanium dioxide, praseodymium and neodymium oxide rare earth mineral powder, calcium fluoride, melamine cyanurate,...

Embodiment 2

[0029] Embodiment 2, its component and parts by weight proportioning are:

[0030] 8 parts of nitrile rubber; 5 parts of copper fiber

[0031] 0.2 parts of rubber compounding agent; 4 parts of aramid fiber

[0032] 12 parts of thermoplastic phenolic resin; 0.5 part of ferric oxide

[0033] 46 parts of friction powder; 2 parts of carbon black

[0034] 0.3 parts of aluminum oxide; 0.5 parts of manganese dioxide

[0035] 0.5 parts of melamine cyanurate 3 parts of calcium fluoride

[0036] Steel fiber 4 parts Lanthanum-rich rare earth chloride 0.2 parts

[0037] Concrete preparation process steps are as follows:

[0038] 1) Weigh the raw materials according to the formula;

[0039] 2) Preparation of molding material: use an open mill for mastic refining of nitrile rubber, add rubber compounding agent after refining, and then add thermoplastic phenolic resin for mixing; after mixing evenly, add friction powder, aluminum oxide, melamine cyanuric acid Salt, copper fiber, arami...

Embodiment 3

[0042] Embodiment 3, its component and parts by weight proportioning are:

[0043] 9 parts of styrene-butadiene rubber; 7 parts of potassium titanate whiskers

[0044] 0.3 part of rubber compounding agent; 1 part of graphite

[0045] 9 parts of thermosetting phenolic resin; 2 parts of ferric oxide

[0046] 45 parts of friction powder; 0.3 parts of calcium fluoride

[0047] 5 parts of copper fiber; 0.3 parts of melamine cyanurate

[0048] 1 part of zinc oxide; 0.3 part of rare earth oxide of praseodymium and neodymium

[0049] Magnesium oxide 0.3 part Lanthanum-rich rare earth chloride 0.3 part

[0050] Concrete preparation process steps are as follows:

[0051] 1) Weigh the raw materials according to the formula;

[0052] 2) Preparation of molding material: use an open mill for mastic refining of styrene-butadiene rubber, add rubber compounding agent after refining, and then add thermosetting phenolic resin for mixing; after mixing evenly, add friction powder, copper fiber...

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Abstract

The invention relates to a friction material used in express train brake and its method for preparing. The materials include rubber, gum cement, resin, friction-type mix, fibrous material and mineral filler. It is characterized in that the materials also include tripoly cyanoamine cyanurate, mineral filler, didymia rare-earth powdered ore, lanthanum chlor rare earth powdered ore, the proportion of the weight part of each component is: rubber of 5-10 parts,fibrous material of 8-13 parts, gum cement of 0.2-0.6 part, mineral filler of 2-7 parts,resin of 5-12 parts, tripoly cyanoamine cyanurate of 0.5-1 parts,and friction-type mix of 40-50 parts. The method for preparing includes preparing moulded materials, compression molding and after-treatment. The invention reduces the high-temperature degeneracy of the friction material because it has selected tripoly cyanoamine cyanurate which has self-lubricating property and is of good fire-retardancy as addition agent and improves the cooperating knife-bar among gasket materials because it has added rare-earth powdered ore. The method for preparing moulded materials adopting rubber-making technology is of simple technology and suitable for commercial manufacture, and is of zero environmental contamination, zero noise and nuisance free.

Description

1. Technical field: [0001] The invention relates to a friction material, in particular discloses a friction material for high-speed train braking with moderate friction coefficient, good wear resistance and good temperature resistance and a preparation method thereof. The friction material can be widely used in the manufacture of brake pads, brake pads, brake shoes, etc. in braking systems such as high-speed trains, urban rail transit, and subways. 2. Background technology: [0002] The train brake pad is one of the important parts of the whole brake device, it plays a vital role in the braking performance of the train, especially the disc brake pad of the high-speed train, not only requires it to have a stable high Friction coefficient, and it has good wear resistance and temperature resistance under high-speed braking and high friction conditions, and requires no damage to the brake disc and low braking noise. [0003] In 1998, my country's railway transportation speed in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/14C08L9/02C08L9/06C08K5/14F16D69/02
Inventor 丛培红李同生黄春祥闫里选刘旭军
Owner SHANGHAI PEIMENG MATERIAL SCI & TECH
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