Ultralow-friction composite brake shoe for European freight train

Abstract

The invention aims to provide a composite brake shoe with the ultralow friction coefficient. The composite brake shoe can replace a cast iron brake shoe. The composite brake shoe comprises a frictionbody and a steel back. The friction body sequentially comprises, by mass percentage, 4%-8% of butadiene rubber, 4%-10% of steel fibers, 1.5%-3% of acrylic fibers, 1.5%-3% of aramid fibers, 4%-8% of liquid butadiene rubber, 18%-25% of modified phenolic resin, 20%-30% of graphite, 2%-6% of mica powder, 2%-5% of barium sulfate, 0.5%-2% of aluminum oxide, 1%-3% of iron powder, 3%-6% of calcium carbonate, 1%-2% of vulcanization accelerators and 5%-15% of other filling materials. The composite brake shoe has the ultralow friction coefficient, can fulfill the braking function instead of the cast ironbrake shoe under the condition that a braking unit is not changed, and reduces the pollution, caused by chemical components in the wear debris, to the environment.

Description

technical field [0001] The invention relates to a braking device for European trucks, in particular to an ultra-low friction coefficient synthetic brake shoe for European trucks with a friction coefficient of 0.08-0.12. Background technique [0002] Most countries in Europe use the UIC standard issued by the European Union of Railways. The maximum weight of a carriage used by the trucks used is 90t, and the maximum operating speed is 120km / h. Most of the brake shoes currently used are cast iron brake shoes. [0003] The characteristics of cast iron brake shoes are as follows: [0004] 1. Cast iron brake shoes contain a large amount of phosphorus, which has caused great harm to the environment during use. [0005] 2. The cast iron brake shoe is heavy and inconvenient to install. [0006] 3. The casting process it adopts consumes high energy and causes great environmental pollution. [0007] 4. During the use of cast iron brake shoes, it is very easy to produce wheel scratc...

AI Technical Summary

Problems solved by technology

[0004] 1. Cast iron brake shoes contain a large amount of phosphorus, which has caused great harm to the environment during use

[0005] 2. The cast iron brake shoe is heavy and inconvenient to install

[0006] 3. The casting process used by it consumes high energy and causes great environmental pollution

[0007] 4. During the use of cast iron brake shoes, it is easy to produce wheel scratches, causing damage to wheels and rails

[0008] 5. Sparks and noise are easy to be generated during the braking process of cast iron brake shoes

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