一种基于GMA的液压高速开关阀阀芯结构的设计

如何解决大流量和高响应之间的矛盾一直是液压高速开关阀设计中的难点,在传统液压阀的结构中要实现大流量势必要增加阀芯通径和行程,这样会使响应时间变慢.虽然采用超磁致伸缩致动器（GMA）代替传统比例电磁铁结构来实现电—机械转换可得到更高的响应速度和更大输出力,但同时由于超磁致伸缩材料的特性,其输出位移很小,从而限制了阀的流量.因此经过反复的建模分析,设计一种多通流面阀芯结构,以实现阀芯在高响应的同时产生较大的流量.在相同的阀芯尺寸和工况下,多通流面阀芯流量是传统锥阀的1.8倍.

Design of Hydraulic High-Speed Switch Valve Spool Based on GMA

How to solve the contradiction between large flow and high response remains to be a difficult problem in the design of hydraulic high-speed switch valve,for the achievement of high flow of the traditional hydraulic valve means increasing the diameter and stroke of the valve spool,which consequently lengthens response time.The giant magnetostrictive actuator （GMA） in place of the traditional proportional electromagnet structure can be adopted to obtain higher response rate and larger output through electrical-mechanical conversion,but because of the characteristics of giant magnetostrictive material,the output displacement is very small,which limits the flow of the valve.Therefore,a multi-way stream surface valve spool was designed on the basis of repeated modeling to achieve both larger flow and higher response of the spool.The comparative analysis showed that the flow of multi-way stream surface spool was 1.8 times than that of the conventional cone valve when the valve spool was of the same size and working condition.