比例伺服阀非线性液动力模型修正与特性分析  

Revision and Characteristic Analysis of Nonlinear Flow Force Model of Proportional Servo Valve

作　　者：艾超[2] 刘礼庆 魏立忠 陈立娟[2] 高伟[3] 任建新 AI Chao;LIU Liqing;WEI Lizhong;CHEN Lijuan;GAO Wei;REN Jianxin(School of Mechanical Engineering,Nanjing Institute of Technology,Nanjing,Jiangsu 211167;School of Mechanical Engineering,Yanshan University,Qinhuangdao,Hebei 066004;School of Advanced Manufacturing,Sun Yat-sen University,Guangzhou,Guangdong 510275;Nanjing Chenguang Group Co.,Ltd.,Nanjing,Jiangsu 211100)

机构地区：[1]南京工程学院机械工程学院,江苏南京211167 [2]燕山大学机械工程学院,河北秦皇岛066004 [3]中山大学先进制造学院,广东广州510275 [4]南京晨光集团有限责任公司,江苏南京211100

出　　处：《液压与气动》2024年第11期82-93,共12页Chinese Hydraulics & Pneumatics

基　　金：国家自然科学基金(52105059)。

摘　　要：比例伺服阀的高速运行以及油液流动状态直接影响液动力的变化,进而影响比例伺服阀和伺服机构的动静态性能。基于此,为明确比例伺服阀液动力的变化规律和特性,首先基于阀芯和阀体配合的节流口结构建立液动力的理论数学模型。然后结合流场仿真,分析不同开度和不同压差下液动力变化情况,明确液动力仿真结果和理论结果的偏差,修订液动力理论数学模型。最后,基于液动力测试平台,验证了不同开度和压差下液动力变化情况。结果表明:射流角的减小会导致稳态液动力不断增大,阀口开度的增大使稳态液动力呈现先增大后减小的趋势,同时在小开度下压差越大对应稳态液动力的峰值也越大,研究成果为比例伺服阀非线性补偿控制提供理论基础。Due to the high-speed operation of the proportional servo valve and the flow state of the oil,the change of the hydraulic power is directly affected,then the dynamic and static performance of proportional servo valve and servo mechanism is affected.Therefore,in order to clarify the changing rules and characteristics of the flow force of the proportional servo valve,firstly,the theoretical mathematical model of flow force is established based on the orifice structure of valve core and valve body.Then,combined with the flow field simulation,the flow force changes under different openings and different pressure differences are analyzed,clear the deviation between the flow force simulation results and the theoretical results,revised mathematical model of hydrodynamic theory.Finally,based on the flow force test platform,the flow force changes under different openings and pressure differences are verified.The results show that the decrease of jet angle leads to the increase of steady-state hydrodynamics,the steady-state flow force power increases first and then decreases with the increase of valve opening.At the same time,the greater the pressure difference at the small opening,the greater the peak value of the steady state flow force.The research results will provide theoretical basis for nonlinear compensation control of proportional servo valve.

关 键 词：比例伺服阀 稳态液动力 模型修订 非线性特性 

分 类 号：TH137[机械工程—机械制造及自动化] TP137[自动化与计算机技术—控制理论与控制工程]