双线圈磁流变先导阀设计与性能研究

为提高磁流变先导式溢流阀的压力特性,对磁流变先导式溢流阀导阀(简称磁流变先导阀)进行结构设计和性能研究。采用圆环形和圆盘形组合式阻尼间隙,选择双激励线圈反向通电的方法,达到优化磁场结构即提高磁场利用率的目的。利用Ansoft Maxwell仿真对间隙宽度分别为0. 8,1,1. 2 mm的3种阻尼间隙进行电磁场仿真,并确定最优阻尼间隙宽度。利用CFD仿真对磁流变先导阀的内部流场进行分析。对磁流变先导阀进行压力特性实验,实验测得单激励线圈通电、双激励线圈反向通电时,磁流变先导阀调定压力与加载电流的关系曲线。分析实验结果得出:磁流变先导阀的结构设计合理,提高了磁流变先导阀的调压能力及响应速度,调定压力与电流成正比,最后达到最大调定压力。

Design and Performance Study of Double Coil Magnetorheological Pilot Valve

In order to improve the pressure characteristics of the magnetorheological(MR) pilot-operated relief valve, structural and performance of a pilot valve with the MR pilot-operated relief valve (referred to as a MR pilot valve) is studied. The purpose of optimizing the magnetic field structure is to improve the utilization of the magnetic field by using a circular and disc-shaped damping clearance and selecting a double excitation coil reverse method. Ansoft Maxwell software simulates the electromagnetic field with three damping gaps that gap widths of 0.8 mm, 1 mm and 1.2 mm, and determines the optimal damping gap width. The internal flow of MR pilot valve is simulated by CFD software. The MR pilot valve performs a pressure characteristic test. When the single-excitation coil or the double-excitation coil is energized, the test determines the relationship between the regulating pressure of the MR pilot valve and the load current. The results show that the structure design of the MR pilot valve is reasonable, the pressure regulating ability of the MR pilot valve is improved, the regulating pressure is proportional to the current, and the maximum regulating pressure is reached at last.