重载货车高摩擦因数制动闸瓦热负荷研究  

Research on Heat Load of the Brake Shoe with High Friction Coefficient of Heavy-Load Wagon

作　　者：陈旭[1] 肖绯雄[1] 

机构地区：[1]西南交通大学牵引动力国家重点实验室,四川成都610031

出　　处：《润滑与密封》2014年第4期49-54,共6页Lubrication Engineering

基　　金：四川省科技计划项目(2013GZ0032)

摘　　要：采用热-结构顺序耦合对货车高摩擦因数合成制动闸瓦在紧急制动工况和长大坡道调速制动工况下进行热应力仿真分析。结果表明:在紧急制动工况下,闸瓦的最高温度出现在制动28s后,为206.2℃,最大应力出现在制动32 s后,为15.4 MPa;长大坡道调速制动时,最高温度和最大应力都出现在制动结束时,分别达到594.8℃、55.6MPa。仿真结果与实验结果一致,较为真实地反映了整个过程中闸瓦的瞬态温度和应力变化情况,且闸瓦一次制动满足要求。The heat stress of the brake shoes with high friction coefficient of freight train was simulated by thermal-structural order coupled method on the condition of the emergency brake process and long slope brake process. The results show that, during the emergency brake process, the maximum temperature occurs at about 28 s and the maximum stress occurs at about 32 s, which is 206. 2 ℃ and 15.4 MPa separately. On the condition of long slope brake process, the maximum temperature and maximum stress occur at the end of bra- king, which is 594. 8℃and 55.6 MPa separately. The simulation results, which are consistent with the test results, can accurately reflect the transient temperature and stress change of the brake shoe in the whole braking process, and the brake shoe meets the requirement of one braking process.

关 键 词：合成闸瓦 高摩擦因数 热-结构顺序耦合 热应力 

分 类 号：TH117.1[机械工程—机械设计及理论]