超磁致伸缩材料转换器喷嘴挡板伺服阀的热变形补偿研究  

Study on thermal deformation compensation based on giant magnetostrictive material actuator for servo valve

作　　者：于宗保[1] 

机构地区：[1]安徽理工大学机械工程系,安徽淮南232001

出　　处：《煤炭学报》2006年第3期396-400,共5页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(59835160);安徽省教育厅自然科学基金资助项目(2003kj109)

摘　　要：介绍了GMM(超磁致伸缩材料)转换器热变形抑制的常用两种方法:冷却和补偿方法,分析了GMM转换器及喷嘴挡板阀的结构组成和工作原理.针对伺服阀用GMM转换器的具体特点,提出了一种新型的热变形补偿机构.构建了基于GMM转换器喷嘴挡板阀的控制压力测试系统,研究了基于GMM转换器的喷嘴挡板阀补偿机构的有效性和实用性.结果表明,提出的补偿机构能有效地补偿GMM棒的热变形,提高了GMM转换器喷嘴挡板阀控制压力的输出精度.Two common methods of thermal deformation compensation of the GMM （Giant Magnetostrictive Material） actuator, the compulsive cooling methods and the thermal compensation methods, were introduced. And the structure and work principle of the GMM actuator and the nozzle flapper valve were analyzed. A new thermal compensation mechanism was offered as well, considering the specific feature of the GMM actuator for the servo valve. Moreover the experimental system testing the control pressure was also constructed. The affectivity and practicability of the compensation mechanism was investigated. The results show that the thermal compensation mechanism can efficiently compensate for the thermal deformation of the GMM rod, and the accuracy of the control pressure of the GMA nozzle flapper valve is improved.

关 键 词：超磁致伸缩转换器 伺服阀 热变形补偿 

分 类 号：TH137.52[机械工程—机械制造及自动化]