水压大流量高速开关阀设计及试验研究

为满足大流量和快响应电液控制系统的需求，采用大功率直线电机分步直接驱动先导阀与主阀阀芯，将直线电机驱动技术与先导阀结构紧密结合，研制出一款直线电机驱动的水压高速大流量开关阀.建立了开关阀AMESim模型，并对其关键结构参数进行了仿真优化，得到了其动态特性曲线.通过Matlab/Simulink对直线电机位置环及速度环进行双环运动规划，控制阀芯的运动状态，进而实现阀口开度的精确数字控制，提高了大流量高速开关阀的控制精度.完成了开关阀原理样机的研制，开展了直线电机控制的运动轨迹试验研究.结果显示，其跟随性能良好，能够实现设定的运动规划，与仿真结果基本相符，满足高速、大流量的技术要求. 

Design and Experimental Research of Water Hydraulic Large Flow and Fast Response On/Off Valve

In order to meet the demand of large flow and fast response electro-hydraulic control system, a large flow and fast response on/off valve driven by a linear motor was developed. The basic principle was that, integrating the linear motor drive technology with the pilot valve structure closely, the pilot valve and main valve spool were direct driven respectively by a high power linear motor. Firstly, a model was established with AMESim simulation software for the hydraulic quick opening valve to optimize the key structural parameters and to get its static and dynamic characteristics. Then the motion plan was programmed with Matlab/Simulink software for both the position loop and the speed loop of the linear motor to control the movement state of the on/off valve pilot spool and the main spool, to achieve a precise digital control of the valve opening and improve the control accuracy of the fast response and large flow valve. Finally, a prototype of the on/off valve was developed, and the trajectory test of linear motor was carried out. The results show that the linear motor possesses a better following performance and can achieve the planned motion curve. The experiment and simulation results are basically consistent, which proves that the characteristics of the developed hydraulic valve can satisfy the need of large flow and fast response.