Low-temperature flexible high-friction composite brake shoe

Abstract

The invention discloses a low-temperature flexible high-friction composite brake shoe. Material prescriptions matched with an antiager and an accelerant in producing the an existing composite brake shoe is modified, wherein the material prescriptions comprise main raw materials including butadiene rubber, resin, iron powder, barium sulfate, sulfur, zinc oxide, bauxite, graphite, mineral crystal whiskers and the like. A new formula is provided according to the principle of conquering the unyielding with the yielding, an asbestos ingredient is removed, mineral synthetic fibers and metal wool as well as an organic friction performance regulator are added as friction materials, a butadiene rubber tackifier is taken as a binder, ethylene propylene diene monomer and the mineral synthetic fibers are taken as reinforcing materials, and modified resin, a lubricant and a coolant are added, so that the brake shoe features in elasticity, and strength, toughness and service life of a friction piece are greatly improved.

Description

Technical field: [0001] The invention relates to a braking device for ensuring the safe operation of railway locomotives, belonging to the technical field of locomotives and vehicles braking. Background technique: [0002] Brake shoe is an important part to ensure the safe operation of railway rolling stock. At present, the high-friction synthetic brake shoes for railway locomotives developed in my country and internationally are mainly composed of resin, iron powder, barium sulfate, sulfur powder, zinc oxide, bauxite, asbestos, anti-aging agent, composed of agents, etc. Although this high-friction synthetic brake shoe overcomes the shortcomings of traditional cast iron brake shoes, there are still some shortcomings, the most important of which are: the structure of the tile body only has bonding materials and friction materials, and the tile body lacks elasticity during braking. Stretching, leading to temperature rise, causing vibration (jumping vibration) when the train b...

AI Technical Summary

Problems solved by technology

Although this high-friction synthetic brake shoe overcomes the shortcomings of traditional cast iron brake shoes, there are still some shortcomings, the most important of which are: the structure of the tile body only has bonding materials and friction materials, and the tile body lacks elasticity during braking. Stretching, leading to temperature rise, causing vibration (jumping vibration) when the train brakes, causing impact on the wheel and rail, making it easy for the train to derail when passing through a turnout or a bend, and causing hidden dangers to driving safety; secondly It is a component containing asbestos in synthetic brake shoes

Asbestos is not only a carcinogen, but also produces asbestos dust during the braking of railway locomotives, causing air pollution; in addition, the synthetic brake shoes containing asbestos also have the problem of poor thermal conductivity, which will cause brake damage during braking. The "locking" of tiles leads to scratches and peeling of wheel treads, which seriously affects the safety and service life of railway rolling stock

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