【摘要】 设计了超声波轴承用压电换能器,确定所采用的压电换能器的相关参数,并采用有限元法进行压电换能器的振动模态分析,确定压电换能器辐射端面与其他零件组成摩擦副时产生最佳减摩效果的振动模态,并通过实验研究加以验证.研究表明,压电换能器处于纵向振动状态时产生的减摩效果最好.实验证明,超声振动具有良好的减摩性能,同种材料形成的摩擦副,在超声振动状态下静摩擦系数比非振动状态下降低了70%.更多还原

【Abstract】 Piezoelectric ceramic actuator for ultrasonic vibration bearing was designed and relative parameters of piezoelectric ceramic actuator were ascertained.Finite element method was used to carry out analysis of vibration mode of piezoelectric ceramic actuator,and then the best vibration mode of anti-friction effect was ascertained when friction pair was composed of radiation surface of the piezoelectric ceramic actuator and other accessories.The results were verified by experiments.The conclusion indicated that the vertical vibration mode of piezoelectric ceramic actuator had the best anti-friction effect.The experiment testified that ultrasonic vibration had good anti-friction performance,and the static friction coefficient of friction pair composed of the same kind of material in state of vibration was reduced to 70% compared with non-vibration.更多还原