压电数字阀电-机械转换器设计与分析  

Design and analysis of piezoelectric digital valve electromechanical converter

作　　者：许有熊[1] 朱松青[1] 

机构地区：[1]南京工程学院自动化学院,江苏南京211167

出　　处：《机械设计》2013年第11期77-82,共6页Journal of Machine Design

基　　金：南京工程学院校级科研基金资助项目(YKJ201108);江苏省高校自然科学资助项目(12KJB510006)

摘　　要：针对压电陶瓷本身输出位移微小不能直接用于电-气(液)阀作为电-机械转换器的缺点,设计了一种基于弹性铰链的一级微位移放大机构以有效放大压电陶瓷的输出位移,并作为数字阀的电-机械转换器。进行了放大机构的结构和参数设计,并采用有限元分析方法对其进行了静力学、动力学和疲劳强度分析。分析表明,该设计符合要求。最后,对所设计的放大机构进行放大特性实验研究。实验表明:该放大机构实际放大倍数为4.2,基本接近于有限元分析放大倍数4.59,且具有良好的动态响应特性,可作为研究高性能压电数字阀的电-机械转换器。Because of its output micro-displacment,piezoelectric ceramic cannot be directly used as the electro-mechanical converter of electro-pneumatic （or hydraulic） valve.To solve this problem,one-stage micro-displacement amplification mechanism based on elastic hinges which can effectively enlarge the outpout displacement of piezoelectric ceramics was designed as the electro-mechanical converter.Its structure and parameters were desgined and its statics,dynamics and fatigue strength were analyzed by finite element analysis method.The analysis showed that the designed amplification mechanism could meet the requirements.Finally,the experimental research on the designed amplification mechanism was done.The experiments showed that the actual amplification factor of the amplification mechanism was 4.2 which was close to the finite element analysis of 4.59 and had good dynamic response characteristics,which can be uesd as the electro-mechanical converter of high performance piezoelectric digital valve.

关 键 词：压电 放大机构 弹性铰链 电-机械转换器 有限元 

分 类 号：TH122[机械工程—机械设计及理论] TM282[一般工业技术—材料科学与工程]