摘要
高速列车通过弓网系统获取能量,弓网系统安全、稳定地运行对列车正常行驶具有重要意义。接触线长期暴露在空气中存在不同程度的氧化,界面氧化对弓网接触副摩擦磨损性能的影响以及不同界面氧化程度下滑板材料的损伤特性尚不明确。基于往复式弓网载流摩擦磨损试验台,通过在接触界面加入氧化铜粉末,定量研究界面氧化对弓网接触副摩擦磨损性能的影响。通过对比不载流与载流条件下的试验,分析界面氧化时机械磨损与电气磨损的竞争机制。研究结果表明:不载流时,界面氧化能有效减小滑板磨损率和摩擦系数;载流时,摩擦系数及滑板磨损率随氧化膜厚度增加呈先降低后增加的趋势,适当厚度的氧化膜能够降低接触副材料的机械磨损,改善弓网接触副的接触状态,氧化膜厚度继续增加会使电气磨损占主导地位,加剧接触副材料损失。观察滑板磨损形貌发现:无电流时,氧化膜的加入能够明显降低滑板与接触线间的黏着;载流条件下,当氧化膜厚度为4.6μm时,滑板表面较为平整光滑并存在大片铜转移层,随着氧化膜厚度继续增加,滑板表面烧蚀痕迹加剧。研究结果对认识弓网接触副损伤机理,提升弓网系统接触性能具有指导意义。
High-speed trains obtain energy through the pantograph-catenary system.The safe and stable operation of this system is crucial for the train??s normal operation.The catenary is exposed to air over a long period,resulting in varying degrees of oxidation.However,the impact of interface oxidation on the friction and wear performance of the pantograph-catenary system and the damage characteristics of the slide plate material under different degrees of interface oxidation has not been well understood.Using a reciprocating pantograph-catenary current-carrying friction and wear test rig,this study quantitatively examined the effect of interface oxidation on the friction and wear performance of the pantograph-catenary system by adding copper oxide powder to the contact interface.Tests under current-carrying and noncurrent-carrying conditions were compared to analyze the competition between mechanical and electrical wear during interface oxidation.The results demonstrated that,under non-current-carrying conditions,interface oxidation effectively reduced the slide plate wear rate and friction coefficient.Under current-carrying conditions,the friction coefficient and slide plate wear rate decreased initially and then increased as the oxide film thickness increased.A suitable thickness of the oxide film reduced the mechanical wear of the contact pair materials and enhanced the contact conditions of the pantograph-catenary system.However,as the oxide film thickness continued to increase,electrical wear became dominant,exacerbating material loss.Observations of the slide plate wear morphology revealed that,under non-current conditions,the addition of the oxide film significantly reduced adhesion between the slide plate and the catenary.Under current-carrying conditions,when the oxide film thickness was 4.6μm,the the slide plate surface appeared relatively smooth,with large areas of copper transfer layers.As the oxide film thickness further increased,the ablation marks on the slide plate surface became more pronounced.The research results of this study provide guidance for understanding the damage mechanism of the pantograph-catenary system and for enhancing the contact performance of the system.
作者
邓磊
何志江
殷成凤
王虹
高国强
王娟
DENG Lei;HE Zhijiang;YIN Chengfeng;WANG Hong;GAO Guoqiang;WANG Juan(Department of Electrical and Information Engineering,Sichuan Engineering Technical College,Deyang 618000,China;China Energy Engineering Group Anhui Electric Power Design Institute Co.,Ltd.,Hefei 230601,China;College of Electrical and Information Engineering,Lanzhou University of Technology,Lanzhou 730050,China;School of Electrical Engineering,Southwest Jiaotong University,Chengdu 611756,China)
出处
《铁道标准设计》
北大核心
2024年第12期162-168,共7页
Railway Standard Design
基金
国家自然科学基金项目(51922090)。
关键词
高速铁路
弓网系统
界面氧化
摩擦磨损
表面形貌
试验
high-speed railway
pantograph-catenary system
interface oxidation
friction and wear
surface topography
test
