一、问题的提出目前液压系统中的换向阀不论是滑阀、锥阀,它们都没有彻底跳出滑阀的范畴。众所周知,滑阀不论在对液压油、过滤精度、加工精度、材料及热处理等方面要求较高外,而且还存在着内部泄漏、互换性差、不易修复等缺点,能否开辟新的途径去解决滑阀存在的问题,这就向设计者提出了新的课题。本文就63巴液压膜片式逻辑元件和换向阀的研究成果作一介绍。二、液压膜片式换向阀的工作原理和结构液压膜片式换向阀由液压三门、四门、电磁卸荷阀组合而成双电控二位四通。其回路见图1。液压四门是双稳元件,S_1和S_2是它的两 First, the problem raised At present, the hydraulic system in the valve, whether it is spool valve, cone valve, they do not completely out of the scope of the spool valve. As we all know, both in the spool valve on the hydraulic oil, filtration accuracy, processing accuracy, materials and heat treatment and other aspects of the higher requirements, but also there is internal leakage, poor interchangeability, not easy to repair and other shortcomings, can open up new ways to solve Sliding valve problems, which put forward to the designer a new topic. In this paper, 63 bar hydraulic diaphragm logic components and the research results of the valve made an introduction. Second, the hydraulic diaphragm valve working principle and structure Hydraulic diaphragm reversing valve by the hydraulic three, four, electromagnetic unloading valve combination of dual-controlled two Stone. The circuit shown in Figure 1. Hydraulic four-door bistable components, S_1 and S_2 are its two