Research on New Type of Brake Disc Dased on Continuous Braking on Long Ramps

doi:10.3901/JME.2022.20.391

Abstract

Abstract: With the construction of high-speed railways in the central and western regions of China, the problems caused by long ramps have become increasingly prominent. If the electric brake fails when driving on a long slope, pure air braking will be adopted. The continuous braking caused by the long slope will cause the thermal load of the brake disc of the EMU to rise sharply. Due to the slow aging of heat dissipation, the temperature of the brake disc is too high, and at the same time, a larger temperature gradient is generated, which leads to the generation of thermal fatigue cracks in the brake disc. In order to solve the problem of increasing the heat transfer efficiency and cooling of the brake disc under the long ramp working condition, based on the long ramp working condition of the LanXin line, a new type of aluminum-embedded steel structure brake disc was designed and finite element analysis software was adopted. The simulation calculation of aluminum-embedded steel structure brake disc and all-steel brake disc is carried out, and the temperature field and thermal stress distribution are obtained. The results show that when pure air braking is used on long ramps, the aluminum-embedded steel brake discs can significantly reduce the temperature and temperature gradient of the brake disc surface while achieving lighter weight, and alleviate thermal fatigue problems caused by braking on long ramps.

Key words: train brake disc, long ramp, thermal load, temperature field

CLC Number:

TG157

ZHOU Suxia, SHAO Jing, TONG Xin. Research on New Type of Brake Disc Dased on Continuous Braking on Long Ramps[J]. Journal of Mechanical Engineering, 2022, 58(20): 391-398.

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