Research on two-step throttle characteristics of double-rotation valve port for hydraulic servo joint  

作　　者：Jiang Lin Pan Xiaoyue Ren Lisheng Zhu Jianyang Chen Xinyuan Zhao Hui 蒋林;Pan Xiaoyue;Ren Lisheng;Zhu Jianyang;Chen Xinyuan;Zhao Hui(Key Laboratory of Metallurgical Equipment and Control Technology,Wuhan University of Science and Technology,Wuhan 430081,P.R.China;Institute of Robotics and Intelligent Systems,Wuhan University of Science and Technology,Wuhan 430081,P.R.China)

机构地区：[1]Key Laboratory of Metallurgical Equipment and Control Technology,Wuhan University of Science and Technology,Wuhan 430081,P.R.China [2]Institute of Robotics and Intelligent Systems,Wuhan University of Science and Technology,Wuhan 430081,P.R.China

出　　处：《High Technology Letters》2021年第1期68-75,共8页高技术通讯（英文版）

基　　金：Supported by the National Natural Science Foundation of China(No.61105086);Hubei Province Natural Science Foundation(No.2018CFB626);Wuhan Application Foundation Frontier Project(No.2019010701011404);Institute of Robotics and Intelligent Systems Foundation(No.F201803)。

摘　　要：The hydraulic robot with large output torque is widely used in industry,however,its precision is not high.In order to solve this problem,this paper presents a new structure of rotary valve with double-rotation valve port,which can improve the two-step throttle characteristics of the valve port,reduce the cavitation phenomenon of the valve port,and increase the output accuracy of the hydraulic servo joint.Firstly,the internal flow field of the rotary valve is simulated by using the sliding grid technology of FLUENT software,and the changing rule of the throttle position in the working process of the structure is analyzed.Secondly,compared with the simulation results of rotary valve with single-rotation valve port,it is shown that the two-step throttle characteristics of the structure are less affected by the change of the opening of the rotary valve,and the cavitation index of the joint valve port is reduced.Finally,the influence of the rotation speed of the valve core,oil supply pressure and key dimension of valve core on throttle characteristics of rotary valve have been analyzed.

关 键 词：double-rotation valve port CAVITATION 3D sliding mesh transient solution the two-step throttle pressure changing frequency 

分 类 号：TP242[自动化与计算机技术—检测技术与自动化装置]