沙粒介入高速列车制动界面对摩擦块摩擦磨损行为的影响  

The Effect of Sand Particles Entering the Braking Interface of a High-Speed Train on the Friction and Wear Behavior of Friction Block

作　　者：唐斌 项载毓 范志勇 陈伟[3,4] 张棋翔[3,4] 吴道刚[1] 莫继良 TANG Bin;XIANG Zaiyu;FAN Zhiyong;CHEN Wei;ZHANG Qixiang;WU Daogang;MO Jiliang(School of Mechanical Engineering,Guiyang University,Guizhou Guiyang 550005,China;School of Mechanical Engineering,Guangxi University,Guangxi Nanning 530004,China;School of Mechanical Engineering,Southwest Jiaotong University,Sichuan Chengdu 610031,China;Technology and Equipment of Rail Transit Operation and Maintenance Key Laboratory of Sichuan Province,Southwest Jiaotong University,Sichuan Chengdu 610031,China)

机构地区：[1]贵阳学院机械工程学院,贵州贵阳550005 [2]广西大学机械工程学院,广西南宁530004 [3]西南交通大学机械工程学院,四川成都610031 [4]西南交通大学轨道交通运维技术与装备四川省重点实验室,四川成都610031

出　　处：《摩擦学学报（中英文）》2024年第6期789-799,共11页Tribology

基　　金：国家自然科学基金项目(52205188、U22A20181);贵州省教育厅自然科学研究项目(黔教技[2022]304号);贵阳学院博士科研启动项目(GYU-KY-[2023]);中央高校基本科研业务费专项资金项目(2682023CX026)资助。

摘　　要：针对沙区铁路的列车制动摩擦磨损问题,基于自主研制的高速列车制动摩擦磨损试验台,开展了戈壁沙、沙漠沙介入制动界面后影响摩擦块摩擦磨损行为的试验研究.重点探究了2种不同沙粒介入制动界面后摩擦块表面摩擦磨损特性的演变过程及其差异,结果表明:戈壁沙、沙漠沙的介入,都会破坏摩擦块表面的原始磨屑堆积层,进而改变界面接触状态及磨损特性.戈壁沙介入后的摩擦块表面不易形成稳定的摩擦层,且显露出更多的石墨成分,降低了界面摩擦系数及平均温度.而沙漠沙介入后,由于其粒径相对较小,在摩擦块表面堆积了更多的沙粒,形成了沙粒磨屑混合堆积层,这种堆积层增大了界面摩擦系数和平均温度,并对摩擦块基体材料造成严重损伤.With the continuous development of high-speed railway operation speed and the adaptability requirements of operating environment,the mechanical braking performance of high-speed trains and the friction and wear performance of brake pad urgently need to be improved.However,the mechanical braking system of high-speed trains operates in an open environment,and the entry of external pollutants such as rain,snow,oil stains,sand and dust into the braking interface will further increase the randomness and complexity of the friction and wear characteristics of the friction block surface,leading to degradation of braking performance and endangering the safety of train operation.Currently,most areas in northwest China are located in severe sandstorm environments,and train brake pads often experience varying degrees of cracking.Therefore,in order to further develop the railway industry and high-speed trains,it is necessary to study the friction and wear behavior of train brake interfaces in sandstorm environments.In this research work,based on the self-developed high-speed train braking friction and wear test bench,an experimental study was conducted on the impact of Gobi sand and desert sand on the friction and wear behavior of friction blocks,in response to the problem of train braking friction and wear on railways in sandy areas.The focus was on exploring the evolution process of the friction and wear characteristics and the interfacial friction heat after the two different types of sand particles enter braking interface.The results showed that two types of sand particles with different particle sizes(Gobi sand and desert sand)intervened in the braking interface and affected the interface friction behavior.Moreover,there were significant differences in the interface friction coefficient,wear behavior of friction block surface,and frictional thermal characteristics between the two cases.After the Gobi sand intervenes in the braking interface,the original debris accumulation layer on the surface of the friction block was d

关 键 词：高速列车 制动界面 摩擦块 摩擦磨损 摩擦热 

分 类 号：TH117.1[机械工程—机械设计及理论]