Temperature characteristics of sliding friction pair under high-speed and strong-current conditions

2017 IEEE Holm Conference on Electrical Contacts Pub Date : 2017-09-01 DOI:10.1109/HOLM.2017.8088084

Zhiyong Wang, Fengyi Guo, Shuai Liu, Bilguun Baatar, Yuting Wang, Haihong Liang

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引用次数: 1

Abstract

To reduce the influence of temperature distribution of pantograph-catenary system on the electrical contact characteristics, a temperature field simulation model was established with COMSOL Multiphysics software. The validity of the model was verified with temperature experiments. Both thermal time constant and steady temperature rise of contact wire were simulated under flexible contact pressure conditions. The thermal time constant decreases gradually and the steady temperature rise firstly decreases then increases with the increase of sliding speed. The thermal time constant are kept constant and steady temperature rise changes slightly with the increase of contact current. When sliding speed and contact current are kept constant, both the thermal time constant and steady temperature rise under flexible contact pressure conditions are smaller than that of under rigid contact pressure conditions. The transient temperature field was also analyzed and the high temperature trailing phenomenon was found and discussed. The conclusions can be used to further research the temperature characteristics of pantograph-catenary system.

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高速和强电流条件下滑动摩擦副的温度特性

为降低受电弓接触网系统温度分布对电接触特性的影响，利用COMSOL Multiphysics软件建立了受电弓接触网系统温度场仿真模型。通过温度实验验证了模型的有效性。模拟了接触线在柔性接触压力条件下的热时间常数和稳定温升。随着滑动速度的增加，热时间常数逐渐减小，稳定温升先减小后增大。热时间常数保持不变，稳定温升随接触电流的增大变化不大。当滑动速度和接触电流一定时，柔性接触压力条件下的热时间常数和稳定温升均小于刚性接触压力条件下的热时间常数和稳定温升。对瞬态温度场进行了分析，发现并讨论了高温拖尾现象。所得结论可用于进一步研究受电弓-接触网系统的温度特性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2017 IEEE Holm Conference on Electrical Contacts

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