摘要
现有调速阀基本都是采用机械压力补偿器或是流量传感器进行压差补偿,该方案会导致系统结构复杂性增加、能量损失大和流量控制精度低等问题。针对以上问题,提出采用数字压差补偿方案对流量进行精确控制。建立Valvistor阀数学模型,分析获得系统输出流量、先导控制电压、根号下压差之间的近似线性关系,在此基础上,设计出以双线性插值法为工作原理的流量补偿控制器;建立基于双线性插值原理的比例调速阀仿真模型,仿真结果表明:该阀的静态控制精度较高,并且具有较好的等流量特性,负载扰动时具有较高的流量补偿精度且动态响应较快。
The existing flow valve basically uses the mechanical pressure compensator or the flow sensor to compensate the pressure difference,which scheme can lead to the increase of system complexity,the loss of energy and the low precision of flow control,and other problems. Aiming at the above problems,digital differential pressure compensation scheme is proposed to control the flow accurately. The mathematical model of Valvistor valve was established,which could obtain the approximate linear relationship of output flow,pilot control voltage and square root of pressure difference through analysis. Therefore,flow compensation controller based on bilinear interpolation as operational principle was designed. And the simulation model of proportional flow valve was established based on bilinear interpolation principle. The simulation results show that the valve has a high precision of static control and good equal flow characteristics,meanwhile,the valve has high flow compensation accuracy when the load is disturbed,and has fast dynamic response.
作者
王灏
黄越
罗刚
黄家海
WANG Hao;HUANG Yue;LUO Gang;HUANG Jiahai(School of Mechanical Engineering,Taiyuan University of Technology,Taiyuan Shanxi 030024,China;Gansu Lanpec Technologies Ltd.,Co.,Lanzhou Gansu 730070,China)
出处
《机床与液压》
北大核心
2018年第11期82-84,122,共4页
Machine Tool & Hydraulics
基金
国家自然科学基金资助项目(51175362
51205271)
关键词
比例调速阀
Valvistor阀
流量补偿
动静态特性
Proportional flow valve
Valvistor valve
Flow compensation
Dynamic and static characteristics
