液压与气动2025，Vol.49Issue(9)：61-66,6.DOI:10.11832/j.issn.1000-4858.2025.09.007
三级电液伺服阀主阀阀口流场特性分析
Analysis of Flow Field Characteristics at Main Valve Port of Three-stage Electro-hydraulic Servo Valve
摘要
Abstract
As the core control component in hydraulic systems,the three-stage electro-hydraulic servo valve has problems such as large energy loss at the valve port and nonlinear flow control in practical applications.In response to these issues,this study uses flow field simulation analysis software to establish a three-dimensional mesh simulation model of the main valve of a certain three-stage electro-hydraulic servo valve.By simulating the internal flow field of the main valve,the velocity,pressure and turbulent energy dissipation rate distribution characteristics of the fluid inside the valve cavity under different opening degrees of the main spool are analyzed.The simulation results show that under the condition of a valve port pressure difference of 7 MPa,as the opening degree of the main valve increases,the fluid flow velocity at the valve port significantly increases,and the maximum flow velocity always appear in the valve port area.At the same time,it is found that the fluid would generate strong vortices at the throttle and sudden changes in flow direction,leading to significant energy dissipation phenomena.In addition,the flow coefficient of the valve port shows a non-linear decreasing trend with increasing opening,which directly affects the control accuracy of the valve.The research results reveal the energy loss mechanism and flow control nonlinearity of the three-stage electro-hydraulic servo valve,providing important basis for its structural optimization design and control strategy improvement.关键词
电液伺服阀/滑阀/流场/流量系数Key words
electro-hydraulic servo valve/spool valve/flow field/flow coefficient分类
机械制造引用本文复制引用
曹晓明,苏嵩,史俊强,李心远,闫嘉鹏..三级电液伺服阀主阀阀口流场特性分析[J].液压与气动,2025,49(9):61-66,6.基金项目
国家科技重大专项(G24002) （G24002）
