波动接触压力下滑动摩擦副温度及热流特性研究  

Study on Temperature and Thermal Flux Characteristics of Sliding Friction Pair under Fluctuating Contact Pressure Conditions

作　　者：王珂昕 王智勇[1] 郭凤仪 甄卓 曾佳帅 WANG Kexin;WANG Zhiyong;GUO Fengyi;ZHEN Zhuo;ZENG Jiashuai(Faculty of Electrical and Control Engineering,Liaoning Technical University,Huludao 125105;School of Electrical and Electronic Engineering,Wenzhou University,Wenzhou 325035;Loudi Power Supply Branch,State Grid Hunan Electric Power Co.,Ltd.,Loudi 417600)

机构地区：[1]辽宁工程技术大学电气与控制工程学院,葫芦岛125105 [2]温州大学电气与电子工程学院,温州325035 [3]国网湖南省电力有限公司娄底供电分公司,娄底417600

出　　处：《电气工程学报》2024年第4期416-426,共11页Journal of Electrical Engineering

基　　金：国家自然科学基金资助项目(52077158)。

摘　　要：列车运行过程中弓网接触压力的波动会影响摩擦副的温度特性。接触温度过高会加速接触线与滑板的损耗,缩短接触线与滑板的使用寿命。为探究波动接触压力对滑板温度的影响,利用COMSOL仿真软件对弓网系统进行仿真,建立三维有限元模型,对不同工况下的温度特性进行仿真,通过试验验证了仿真模型的准确性。结果表明,波动幅值与波动频率都会使温度发生波动变化;波动接触压力下,滑动速度一定,接触电流越大温度波动幅度越大,接触电流一定,滑动速度越大温度越高;滑板接触面在低速度小电流下的热流密度分布呈现“马鞍形”,在高速度大电流下的热流密度分布呈现“U”形;无波动接触压力下的热流密度大于有波动接触压力状态下的热流密度。The fluctuation contact pressure between contact wire and slide in pantograph-catenary system during train operation can affect the temperature characteristics of the sliding friction pair.High contact temperature will accelerate the wear of contact wire and slide,leading to the reduce of the service life of contact wire and slide.To investigate the impact of fluctuating contact pressure on the contact temperature of the slide,a three-dimensional finite element model is established with COMSOL software to simulate the thermal phenomenon of the sliding friction pair.The accuracy of the simulation model was validated by experiments.The temperature characteristics simulation under various working conditions is carried out.Both fluctuating amplitude and fluctuating frequency of the contact pressure will cause the fluctuations of contact temperature.Under fluctuating contact pressure conditions,at a constant sliding speed,higher contact current leads to larger fluctuation amplitude of contact temperature,and at a constant contact current,higher sliding speed results in higher contact temperature.The thermal flux density distribution of the contact surface on the slide shows a“saddle”shape under low speed and small current conditions,while it shows a“U”shape under high speed and large current conditions.The thermal flux density under stable contact pressure conditions is higher than that under fluctuating contact pressure conditions.

关 键 词：滑动电接触 弓网系统 波动接触压力 温度特性 热流密度 

分 类 号：TM561[电气工程—电器]