Low-temperature flexible high-friction composite brake shoe

A synthetic brake shoe, low-temperature flexible technology, applied in friction linings, mechanical equipment, etc., can solve problems such as hidden dangers of driving safety, air pollution, poor thermal conductivity, etc., to achieve stable friction performance, solve air pollution, and long service life. Effect

CN103883655AActive Publication Date: 2014-06-25吴有站
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2014-06-25

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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.
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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...

Examples

Embodiment 1

[0012] One of the low-temperature flexible high-friction synthetic brake shoe material formulas:

[0013]

[0014]

Embodiment 2

[0016] Low temperature flexible high friction synthetic brake shoe material formula 2:

[0017]

[0018]

Embodiment 3

[0020] The third formula of low temperature flexible high friction synthetic brake shoe material:

[0021]

[0022]

[0023] The low-temperature flexible high-friction synthetic brake shoe manufactured by the formula of the present invention has been tested by the Product Quality Supervision and Inspection Center of the Ministry of Railways, and its performance indicators are all better than the standards issued by the Ministry of Railways, and its wear and temperature rise indicators are particularly prominent. The wheel-rail impact of loading and running on American railways is small and stable. After many tests, the friction consumption of low-temperature flexible high-friction synthetic brake shoes is much lower than the Ministry of Railways standard, and the temperature rise of the tread is low, with a maximum temperature rise of 141 degrees Celsius. The technical conditions allow a temperature of 400 degrees Celsius. Therefore, it not only effectively ensures the l...