摘要
行波超声电机的接触模型是建立在定、转子是光滑接触表面的假设上,而实际中定、转子的接触面是粗糙的。针对这一问题,通过试验研究行波超声电机定子表面摩擦层在预压力下的变形规律;利用Polytec公司PSV-300F-B型高频扫描激光测振系统测试工作状态下的定子振动的频率、幅值和速度随预压力变化的规律;并利用电接触法测试定、转子的接触状态。试验结果表明,60行波超声电机的预压力在100N以上,此时摩擦层的变形量同自由定子(未加上转子)的振幅在同一个数量级上;在预压力下定子的振动幅值和速度大幅下降;工作中定、转子不会产生脱离。这说明传统的接触模型不能够正确地反映定、转子的接触状态。
The hypothesis that contact surfaces of stators and rotors are smooth is used in the contact model of ultrasonic motors,but the actual contact surfaces are rough. Now it is lack of survey on the contact state of the stator and rotor. As a result,firstly the deformation law of the friction layer on the stator surface of a travelling wave ultrasonic motor under pre-pressures was studied by tests. Secondly,the change law of the natural frequency,amplitude and velocity of the stator vibration with the pre-load was investigated by a PSV-300F-B laser vibration meter. Finally,the contact interface properties between the stator and the rotor were analyzed by using the electrical contact method. Experimental results show that the vibration amplitude of the free stator (not be coupled with rotors) is of the same order of magnitude as the deformation of the friction layer under the pre-load of 100N,and the stator and the rotor never separate during running. The study indicates that traditional contact models can not reflect the actual contact performance of the stator and the rotor.
出处
《振动．测试与诊断》
EI
CSCD
北大核心
2009年第4期388-391,共4页
Journal of Vibration,Measurement & Diagnosis
基金
国家自然科学基金资助项目(编号:50975136
50745039)
江苏省自然科学基金资助项目(编号:BK2008384)
关键词
超声电机
摩擦层
摩擦作用
接触模型
ultrasonic motor friction layer friction action contact model
