矿机车盘式制动器摩擦热力学研究  

Research on Friction Thermodynamics of Mine Locomotive Brake Disc

作　　者：张森[1] 肖林京[1] 张玉龙[1] 于鹏杰[1] 

机构地区：[1]山东科技大学,山东青岛266590

出　　处：《煤矿机械》2015年第8期102-105,共4页Coal Mine Machinery

摘　　要：针对矿机车制动盘因热裂纹造成的制动失效问题,对机车制动过程中的摩擦热力学计算展开研究。根据摩擦功率法确定出摩擦生热的热流密度,得出热分析的边界条件,分析了热对流与热辐射模型,建立了具有表面径向裂纹的制动盘有限元模型,采用子模型技术对其进行热-结构耦合分析,结果表明,温度变化的最小熵效应明显,裂纹的远心端点在热载荷作用下产生较大的拉应力并引发裂纹扩展。Aiming at the mine locomotive brake disc failure problem that caused by the hot crack, the thermodynamic calculation of locomotive brake friction is researched. According to the friction power method, the heat flux density is determined, and the boundary conditions for thermal analysis are obtained. Then the heat convection and thermal radiation model are analyzed, and brake disc finite element model is established with radial crack. The submodel technology is used for the couple of thermal-structure analysis, and the results show that the minimum entropy effect is quite obvious during the temperature changes, and large tensile stress is produced in the crack endpoint, which will cause crack propagation.

关 键 词：热裂纹 热力学分析 热-结构耦合 有限元 

分 类 号：U260.35[机械工程—车辆工程]