弓网电接触系统滑板温升特性研究  

Characteristics of Temperature Rise of Pantograph Strip in Electric Contact System between Pantograph and Catenary

作　　者：周悦[1,2] 魏文赋 高国强[1] 吴杰[1] 吴广宁[1] ZHOU Yue;WEI Wenfu;GAO Guoqiang;WU Jie;WU Guangning(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 610031,China;State Grid Yuyao Power Supple Company,Ningbo 315400,China)

机构地区：[1]西南交通大学电气工程学院,四川成都610031 [2]国网余姚市供电公司,浙江宁波315400

出　　处：《铁道学报》2019年第6期74-80,共7页Journal of the China Railway Society

基　　金：国家自然科学基金(U1234202,51577158,51607147);国家杰出青年科学基金(51325704)

摘　　要：弓网电接触系统中的受电弓滑板温升会改变接触表面环境,加重摩擦磨损,影响电力机车的可靠运行。基于自行研制的弓网电接触试验平台,探究焦耳热、摩擦热、电弧热三种热源对滑板温升特性的影响。采用红外热像仪对滑板温升实时拍摄,结合传热学理论,分析三种热源各自特性及其对接触点温升幅值和滑板温度分布的影响。研究表明:焦耳热对滑板温升的影响占主导作用;摩擦热对滑板温升幅值的影响较小;电弧热对滑板有局部加热作用;三种热源联合作用下弓网接触点的温升幅值比仅有焦耳热源输入时接触点温升幅值小,说明接触导线通过与滑板之间的摩擦带走热量,对滑板有一定的冷却功能。本研究对丰富弓网电接触系统温升理论有重要意义。The temperature rise of pantograph strip in electric contact system between pantograph and catenary will change the environment of contact surface, aggravate friction and wear and finally affect the reliable operation of electric locomotives. In this paper, the effects of joule heat, friction heat and arcing heat on the temperature rise characteristics of pantograph strip were studied respectively based on a home-made test apparatus for electric contact between pantograph and catenary. The characteristics of these three heat sources and their impacts on the temperature rise of pantograph strip were analyzed in accordance with the theory of heat transfer. The temperature distributions in the strip and its variations were recorded by a thermal infrared imager. The research shows that joule heat plays a dominant role in the temperature rise while the impact of friction heat on the amplitude of temperature rise is minor. Arcing heat has a local heating effect on the strip. The temperature rise of the contact point between pantograph and catenary under the joint effects of 3 heat sources is smaller than that under joule heat only, which could be an evidence indicating that the contact wire takes away heat through friction with the strip, which has certain cooling function for the strip. The research makes sense for the theory of temperature rise in electric contact system between pantograph and catenary.

关 键 词：弓网电接触 滑板温升 焦耳热 摩擦热 电弧热 

分 类 号：U225.4[交通运输工程—道路与铁道工程]