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Synthetic brake shoe and preparation method thereof

A technology for synthesizing brake shoes and nitrile rubber, which is applied in the field of transportation, can solve the problems that cannot reach 200,000-240,000 kilometers, and the service life of synthetic brake shoes is short, and achieve the advantages of small wheel wear, high yield and long service life Effect

Active Publication Date: 2012-08-22
METALS & CHEM RES INST CHINA ACAD OF RAILWAY SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the service life of these synthetic brake shoes is still relatively short, with an average of 4-7 months, and the vehicle runs only 100,000-150,000 kilometers, which cannot meet the requirements of 200,000-240,000 kilometers.

Method used

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  • Synthetic brake shoe and preparation method thereof
  • Synthetic brake shoe and preparation method thereof
  • Synthetic brake shoe and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation of synthetic brake shoes

[0039] According to the formula composition, weigh the following raw materials:

[0040] 2123 phenolic resin: 3.9Kg, LG6250 nitrile rubber 2.49Kg, graphite 2.49Kg, reduced iron powder 4.53Kg, steel fiber 5.46Kg, wollastonite 2.49Kg, sepiolite MY-A type 3.6Kg, potassium feldspar 4.56Kg , 0.12Kg of alumina, 0.24Kg of sulfur, and 0.12Kg of accelerator CZ.

[0041] The above phenolic resin is a phenolic resin with a curing speed of 90 seconds / 160° C., a softening point of 110° C. and a free phenol weight content of less than 3%.

[0042] The nitrile rubber is nitrile rubber with acrylonitrile weight content of 34% and Mooney viscosity of (1+4) 100° C. 50.

[0043] The iron content of the reduced iron powder is 98% by weight of the iron powder, and the average fineness is 80 meshes;

[0044] The average length of the steel fiber is 8mm, and the average diameter is 0.1mm;

[0045] The average length of the sepiolite was 1 mm, the mois...

Embodiment 2

[0062] Preparation of synthetic brake shoes

[0063] According to the formula composition, weigh the following raw materials:

[0064] 2123 phenolic resin 5.0Kg, LG6250 nitrile rubber 3.50Kg, graphite 3.50Kg, reduced iron powder 5.50Kg, steel fiber 6.50Kg, wollastonite 3.50Kg, sepiolite MY-A type 4.5Kg, potassium feldspar 5.5Kg, Aluminum oxide 0.20Kg, sulfur 0.40Kg and accelerator CZ0.20Kg

[0065] The above phenolic resin is a phenolic resin with an average curing speed of 80 seconds / 160° C., a softening point of 110° C. and a free phenol weight content of less than 2%.

[0066] The nitrile rubber is nitrile rubber with an average acrylonitrile weight content of 31% and a Mooney viscosity of (1+4) 100° C. 45.

[0067] The iron content of the reduced iron powder is 99% by weight of the iron powder, and the average fineness is 80 meshes;

[0068] The average length of the steel fiber is 10mm, and the average diameter is 0.15mm;

[0069] The average length of the sepiolite ...

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Abstract

The invention provides a synthetic brake shoe which comprises the following raw materials in parts by weight: 3-5 parts of phenol formaldehyde resin, 1.5-3.5 parts of nitrile-butadiene rubber, 1.5-3.5 parts of graphite, 3.5-5.5 parts of reduced iron powder, 4.5-6.5 parts of steel fiber, 1.5-3.5 parts of wollastonite, 2.5-4.5 parts of meerschaum, 3.5-5.5 parts of potash feldspar, 0.05-0.20 part ofaluminum oxide, 0.15-0.40 part of sulfur and 0.05-0.20 part of accelerator. The invention selects preferable raw materials and formula to develop the synthetic brake shoe which has the advantages of long service life, low abrasion mating plate and high friction factor. The car loading examination proves that the synthetic brake shoe satisfies the design requirements, does not generate harmful damascene, and does not generate thermal damage on the wheels; the service life is apparently longer than the currently universal synthetic brake shoe with high friction factor, reaching 0.2-0.24 millionkilometers per year; and the application and maintenance cost is lowered, the operation time for replacing the brake shoe is shortened, and the conveying efficiency is enhanced.

Description

technical field [0001] The invention belongs to the field of transportation, and in particular relates to a synthetic brake shoe and a preparation method thereof. Background technique [0002] Since 2002, China has fully used high friction coefficient synthetic brake shoes for the braking of railway freight cars. At present, there are two types of brake shoes, HGM-A and HGM-B, widely used on the whole road. After several years of operation, the effect is good, but its service life needs to be improved. [0003] The Chinese patent application with the application number 200810230368.1 and titled "Abrasion-resistant Material for Locomotive Brake Shoe" discloses a wear-resistant material for locomotive brake shoe. The wear-resistant material has a weight ratio of phenolic Resin 18-25%, sepiolite wool 18-28%, reduced iron powder 15-22%, silica powder 4-5%, barium sulfate 2-3%, rubber powder 8-15%, feldspar powder 3.8-4.8% , barite powder 4-5.5%, heavy calcium powder 5.5-7%, co...

Claims

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Application Information

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IPC IPC(8): C08L61/06C08L9/02F16D69/02C08K13/04C08K7/04C08K7/10C08K3/04C08K3/08C08K3/36C08K3/22C08K3/06B29B7/52B29C43/00B29C71/02
Inventor 裴顶峰党佳贺春江张国文张恒俞播
Owner METALS & CHEM RES INST CHINA ACAD OF RAILWAY SCI
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