极端温/湿环境下弓网接触副载流摩擦学特性研究  

Current-carrying tribological characteristics of pantograph-catenary system contact pair in extreme temperature/humidity environments

作　　者：季德惠 肖丽[1] 熊光耀 沈明学 JI Dehui;XIAO Li;XIONG Guangyao;SHEN Mingxue(School of Materials Science and Engineering,East China Jiaotong University,Nanchang 330013,China;State Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructure,East China Jiaotong University,Nanchang 330013,China)

机构地区：[1]华东交通大学材料科学与工程学院,江西南昌330013 [2]华东交通大学轨道交通基础设施性能监测与保障国家重点实验室,江西南昌330013

出　　处：《铁道科学与工程学报》2024年第11期4735-4745,共11页Journal of Railway Science and Engineering

基　　金：国家自然科学基金资助项目(52365022和52375181);江西省自然科学基金资助项目(20224ACB204012);轨道交通基础设施性能监测与保障国家重点实验室自主课题(HJGZ2023208);江西省研究生创新专项基金资助项目(YC2022-B177)。

摘　　要：弓网系统作为电力机车供电系统的主要构件,需长期暴露于自然环境中进行作业。受电弓碳滑板和接触线之间的接触状态极易受到外界环境即环境温湿度变化的干扰,从而对摩擦副之间的受流质量造成影响,甚至会威胁到列车的安全运行。因此,为了探究服役环境对弓网系统的载流摩擦学性能的影响,采用温湿度可控的往复式载流摩擦磨损试验台,控制服役环境湿度为10%RH和85%RH的碳/铜接触副分别在服役温度为-20℃,0℃和20℃中通入5 A和10 A电流进行载流摩擦试验。经试验数据以及表征分析得出:在无电流工况下,10%RH环境中的平均摩擦因数随着温度降低先减少后增大;85%RH中的平均摩擦因数随着温度的降低而增大;在低温载流工况下,在10%RH的服役环境中平均摩擦因数会随着电流强度的增加呈单调递增趋势,85%RH环境下变化趋势与之相反。另外,在10%RH环境中,铜材料转移和氧化磨损也会随着电流的增加而增强。随着温度不断降低,铜转移量先增加后减少,即在0℃时最高,其氧化程度随着温度降低而增高。然而,在85%RH环境中的铜转移量和氧化程度会随着电流强度的增强而降低,随着服役温度的下降,铜转移量减少但其氧化程度增加。试验研究结果将进一步为极端环境下改善弓网滑动电接触性能及提高受电弓碳滑板的使用寿命提供相关理论支持。As the main component of the power supply system for electric locomotives,the pantograph-catenary system needs to be exposed in the natural environment with long-term operation.The contact state between contact strips and contact wire of the line-pantograph catenary system was highly susceptible to interference from the external environment,namely the environmental temperature and humidity,which would affect the current carrying quality between the friction pair,and even threaten the safety of the train.Therefore,in order to investigate the influence of service environment on the current-carrying tribological performance of the pantograph-catenary systems,carbon/copper contact pairs were chosen as the subject of study.A reciprocating tribometer with controllable temperature and humidity was utilized to conduct triboelectric tests.The humidity of the service environment was controlled at 10%RH and 85%RH,respectively,while the service temperature was varied under both humidity conditions at−20℃,0℃,and 20℃.The applied current values were set at 5 A and 10 A,respectively.According to the test data and characterization phenomenon analysis,it can be concluded as follows.Under no current operating conditions,the average friction coefficient in 10%RH environment decreases first and then increases follow as the temperature decreases.The average friction coefficient increases with the decrease of temperature in the 85%RH environment.In frigid-temperature current carrying conditions,the average friction coefficient in the service environment of 10%RH will increase monotonously with the increase of current intensity,and the change trend in the environment of 85%RH is opposite.Furthermore,in 10%RH environment,the transfer and oxidation wear of copper materials will also grow with the increase of current.As the temperature decreases,the amount of copper transfer first increases and then decreases,reaching its highest point at 0℃,the degree of oxidation increases as the temperature decreases,and the oxidation degree i

关 键 词：弓网系统 载流摩擦 极端湿度 温度 电流强度 

分 类 号：TH117.1[机械工程—机械设计及理论]