V型双振子螺杆式直线压电作动器研究  

Study on V-shape Screw-type Linear Actuator with Double Piezoelectric Vibrators

作　　者：华顺明[1] 李志强[1,2] 孟玉明[1,2] 楼应侯[1] 李加林[1,2] 

机构地区：[1]浙江大学宁波理工学院,浙江宁波315100 [2]太原科技大学机械工程学院,山西太原030024

出　　处：《压电与声光》2015年第5期752-756,共5页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(51275467)

摘　　要：提出一种V型双振子螺杆式直线压电作动器,该作动器由定子圆筒、精密螺母、螺杆及2个弹性体振子构成。利用2个弹性体振子弯曲振动产生的对称模态和反对称模态,激励圆筒端面质点作椭圆轨迹运动,通过螺母和螺杆间的摩擦耦合驱动螺杆作轴向直线运动。利用有限元分析,设计制作了试验样机,并对其主要输出性能进行了实验测试。在电压峰-峰值为300V条件下,样机稳定工作频率为9.7kHz,无负载最大转速为57.7r/min,最大输出力为2.3N。A V-shape linear actuator with double piezoelectric vibrators was proposed,whose rotor was a screw rod.It was compact and consisted of a hollow cylinder,precise nut,screw rod,two elastic vibrators and so on.The precise screw rod was driven by frictional force came from points within spiral surface of the matching nut.These points made elliptic trajectory motion which was generated by symmetrical mode and anti-symmetrical mode of two elastic vibrators＇ bending vibration.Thus,the screw rod was forced to move along axial direction.The prototype actuator was designed and fabricated according to FEM analyzing results,and its main output performances were obtained through corresponding experimental device.The stable driving frequency of prototype is tested as 9.7kHz,and the maximum no-load rotary speed as well as output force are 57.7r/min and 2.3Nseparately under peak-peak voltage of 300 V.

关 键 词：压电作动器 弯曲振动 椭圆运动 有限元分析 直线驱动器 

分 类 号：TM384[电气工程—电机]