Effect of Dynamic Pressure Feedback Orifice on Stability of Cartridge-Type Hydraulic Pilot-Operated Relief Valve

作     者：Yaobao Yin Dong Wang Junyong Fu Hong-chao Jian Yaobao Yin;Dong Wang;Junyong Fu;Hong-chao Jian

作者机构：School of Mechanical EngineeringTongji UniversityShanghai 201804China Shanghai Aerospace Control Technology InstituteShanghai 201109China China North Vehicle research instituteBeijing 100072China 

出 版 物：《Chinese Journal of Mechanical Engineering》 (中国机械工程学报（英文版）)

年 卷 期：2023年第36卷第4期

页      面：227-241页

核心收录：

学科分类：080704[工学-流体机械及工程] 08[工学] 080401[工学-精密仪器及机械] 0807[工学-动力工程及工程热物理] 0804[工学-仪器科学与技术] 

基　　金：Supported by National Natural Science Foundation of China(Grant No.52175059) National Key Research and Development Program of China(Grant No.2018YFB2001100) 

主　　题：Pilot-operated relief valve Dynamic pressure feedback orifice Stability Rapidity Immunity 

摘      要：Current research on pilot-operated relief valve stability is primarily conducted from the perspective of system dynamics or stability criteria,and most of the existing conclusions focus on the spool shape,damping hole size,and pulsation frequency of the ***,the essential factors pertaining to the unstable vibration of relief valves remain *** this study,the dynamic behavior of a pilot-operated relief valve is investigated using the frequency-domain *** result suggests that the dynamic pressure feedback orifice is vital to the dynamic characteristics of the valve.A large orifice has a low flow *** this case,the fluid in the main spring chamber flows freely,which is not conducive to the stability of the relief ***,a small orifice may create significant flow resistance,thus restricting fluid *** this case,the oil inside the main valve spring chamber is equivalent to a high-stiffness liquid *** main mass-spring vibration system has a natural frequency that differs significantly from the operating frequency of the relief valve,which is conducive to the stability of the relief *** agreement is obtained between the theoretical analysis and *** results indicate that designing a dynamic pressure feedback orifice of an appropriate size is beneficial to improving the stability of hydraulic pilot-operated relief *** addition,the dynamic pressure feedback orifice reduces the response speed of the relief *** study comprehensively considers the stability,rapidity,and immunity of relief valves and expands current investigations into the dynamic characteristics of relief valves from the perspective of classical control theory,thus revealing the importance of different parameters.