液压与气动2025，Vol.49Issue(3)：1-7,7.DOI:10.11832/j.issn.1000-4858.2025.03.001
基于压差调控原理的多路阀特性研究
Research on Characteristics of Multi-way Valve Based on Pressure-difference Control Principle
摘要
Abstract
To address issues such as uncontrollable pressure difference,limited flow regulation range,and low flow control precision in pre-compensated multi-way valves,a principle of active pressure-difference control is proposed.By using a proportional pressure-reducing valve to regulate the force on the compensator spool to achieve proportional control of pressure-difference,actively adjusting according to working conditions,and improving the flow-control range.Additionally,a variable gain control strategy is developed,integrating closed-loop main spool position control,flow gain adjustment,and flow force compensation to mitigate adverse factors,match target flow curves,and enhance flow-control precision.Results show that adjusting the pressure-reducing valve allows the main valve pressure-difference to be continuously regulated within 0～1.28 MPa,increasing the flow-control range to 0%～131%of the original valve's capacity.Closed-loop control of the spool position improved accuracy,reducing flow hysteresis from 4.6%to 2%,a decrease of over 50%compared to the original valve.This method enables multiple flow gain configurations with the same main valve without altering the spool structure.By using the pressure-difference control unit to balance hydraulic forces on the compensator,disturbances from flow forces on the pressure-difference are eliminated,further enhancing flow-control precision.关键词
多路阀/压力补偿器/压差调控/流量控制/液动力Key words
multi-way valve/pressure compensator/pressure-difference control/flow-control method/flow force分类
机械工程引用本文复制引用
李磊,耿怀德,赵星宇,权龙..基于压差调控原理的多路阀特性研究[J].液压与气动,2025,49(3):1-7,7.基金项目
国家重点研发计划(2022YFB3403001) （2022YFB3403001）
