超声波电机用摩擦材料的研究进展

归纳并探讨超声波电机摩擦材料的基本要求与国内外研究进展.基于行波型超声波电机驱动特点及运行规律,从摩擦学、接触力学和材料学3个方面对超声波电机用摩擦材料的特殊要求进行探讨,初步得出超声波电机摩擦材料应具有优良的摩擦学、一定的接触变形和一定的结构特性3个方面的特殊要求.最后,针对超声波电机摩擦材料研究中存在的问题,提出一些超声波电机摩擦材料值得重视的研究方向,即建立更为完善的接触模型、研制针对多种环境下使用的多种系列摩擦材料、开发考察摩擦材料性能的专门试验设备与测试技术方法和寿命预测技术方法等.

Research Progresses in Friction Material for Ultrasonic Motor

Ultrasonic motor is a new type of motor which is driven by friction force generated at the interface between the rotor and the stator. Development and applications of ultrasonic motor largely rely on the performance of friction material. The research progress and basic demand of friction material for ultrasonic motor in home and abroad in recent years are discussed. Based on drive mechanism and characteristics of ultrasonic motor, the special demand of friction material should be achieved primarily from in three aspects, i.e. tribology, contact mechanics and material. The three aspects are specified as good tribological properties, proper contact deformation and proper structrual properties. Finally, according to the current problems of friction material for ultrasonic motor, four important topics are proposed. The topics are establishment of better contact model of ultrasonic motor, development of several kinds of friction materials for various environments, development of customized testing method and experimental equipment for friction material and setup method of life prediction.