Wheel-rail friction adjusting material and preparation method thereof

A wheel-rail and friction coefficient technology, applied in the field of rail transit, can solve problems such as limiting the service life of solid wheel-rail tread friction agents, environmental pollution, etc.

Inactive Publication Date: 2020-12-11
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This invention contains heavy metal elements, which will pollute the environment; and the components of this invention contain quicklime, and quicklime will absorb water and deteriorate in the air, which limits the service life of the solid wheel-rail tread friction agent

Method used

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  • Wheel-rail friction adjusting material and preparation method thereof
  • Wheel-rail friction adjusting material and preparation method thereof
  • Wheel-rail friction adjusting material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0048] The present embodiment provides a formula for preparing the wheel-rail friction regulating material, and the product is mainly used on heavy-duty trains with larger axle loads, providing a coefficient of friction of 0.3-0.4, and its product components are: polytetrafluoroethylene The mass fraction is 25, the mass fraction of graphite is 35, the mass fraction of silicon dioxide is 14, the mass fraction of phenolic formaldehyde is 18, and the mass fraction of paraffin is 8.

Embodiment 2

[0050] The present embodiment provides a kind of formula for preparing wheel-rail friction regulating material, and this product is mainly used in traditional passenger car and train set, provides the coefficient of friction of 0.25-0.35, and its product component is: polytetrafluoroethylene mass parts 34, the mass fraction of graphite is 34, the mass fraction of silicon dioxide is 10, the mass fraction of phenolic formaldehyde is 16, and the mass fraction of paraffin wax is 6.

Embodiment 3

[0052] The present embodiment provides a kind of formula for preparing wheel-rail friction regulating material, and this product is mainly used on the subway train, provides the coefficient of friction of 0.2-0.3, and its product component is: polytetrafluoroethylene mass fraction is 40, The mass fraction of graphite is 30, the mass fraction of silicon dioxide is 15, the mass fraction of phenolic formaldehyde is 12, and the mass fraction of paraffin is 3.

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Abstract

The invention discloses a wheel-rail friction regulating material. The raw material composition and mass ratio of the wheel-rail friction regulating material are 20-60 parts of polytetrafluoroethylene, 20-60 parts of graphite, 0.2-20 parts of silicon dioxide, and phenolic resin 5-20 parts and 2-10 parts of paraffin; the main steps of the production of wheel-rail friction adjustment materials: first mix polytetrafluoroethylene with graphite, dry it, mix it with silicon dioxide after drying, and then add phenolic resin to make it Mixing materials, adding paraffin powder after mixing materials, then heat-treating and pressurizing the mixed materials, and then using stepwise cooling to complete the production of wheel-rail friction adjustment materials; the system of the present invention has good stability, and the preparation process is not complicated. The special wheel-rail friction adjustment material can adjust the wheel-rail friction coefficient to maintain it between 0.2‑0.4.

Description

technical field [0001] The invention belongs to the field of rail transportation, and in particular relates to a wheel-rail friction adjusting material. Background technique [0002] The wheel-rail friction adjustment material can adjust the wheel-rail friction coefficient to maintain it in an appropriate range. The wheel-rail friction coefficient is greatly affected by the outside world. In a dry environment, the wheel-rail friction is as high as 0.7. After being polluted by oil, the friction coefficient is lower than 0.1. Maintaining the wheel-rail friction coefficient near 0.3 is the key technology to ensure safe and economic travel in wheel-rail traffic . If the friction coefficient of the wheel and rail is too large, it will cause greater fatigue and wear of the wheel and rail, resulting in a multiplied increase in the cost of wheel and rail maintenance and repairs. If the wheel-rail friction coefficient is too low, the wheel traction brake will fail, which will affec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M161/00C09K3/14
Inventor 崔大宾
Owner SOUTHWEST JIAOTONG UNIV
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