行波型超声波电动机摩擦材料的寿命预测模型  

Life Prediction Model for Friction Material of Traveling Wave Ultrasonic Motor

作　　者：曲建俊[1] 田秀[1] 孙凤艳[2] 

机构地区：[1]哈尔滨工业大学机电工程学院,哈尔滨150001 [2]北京科技大学国家材料服役安全科学中心,北京100083

出　　处：《机械工程学报》2011年第1期96-101,共6页Journal of Mechanical Engineering

基　　金：国家自然科学基金(50975057);国家重点基础研究发展计划(973计划;2007CB607602)资助项目

摘　　要：针对转子摩擦材料与定子的动态接触过程,提出摩擦材料的磨损是由定子上的波峰一次次包络而产生。借助行波型超声波电动机定子和转子的粘弹性接触模型,推导出法向压力分布和定子与转子相对滑动速度函数,代入Archard经典磨损计算公式,建立了行波型超声波电动机摩擦材料的磨损寿命预测模型。在建模中,利用了行波中位移和时间参数之间的特定关系,分析定子和转子的接触区间大小,并考虑摩擦材料厚度变化。基于所建立的模型,模拟迭代出一种行波型超声波电动机的摩擦材料磨损寿命预测曲线。结果表明,磨损寿命预测曲线与试验结果相一致,证实了预测模型的合理性。Aiming at the dynamic contact process between stator and rotor,it is proposed that wear of friction material is generated by the reciprocating scratch of wave crests on stator surface.The visco-elastic contact model of stator and rotor is used to deduce the functions of normal pressure distribution and relative sliding speed,which are introduced to the traditional wear equation-Archard equation.Then,the wear and life prediction model of TWUSM friction material is established.In the model,the special relationship between time and distance are used to analyze contact interval,and the change of friction material thickness is also considered.Based on this model,the wear and life prediction curve of a TWUSM friction material is simulated.As a result,the life prediction curve is consistent with the experiment which verifies the rationality of the prediction model.

关 键 词：行波型超声波电动机 摩擦材料 磨损 寿命预测 

分 类 号：TM356[电气工程—电机]