双向切换电磁阀复位特性的优化设计

双向切换电磁阀广泛应用于运载型地面供气系统,阀位直接影响供气系统的压力变化。利用试验和仿真方法对双向切换电磁阀进行了研究,发现在先放气后断电再供气时,常闭侧存在窜气现象,通过在常闭侧背压腔增加复位弹簧的方式对结构进行了优化。结果表明:在常闭侧背压腔增加复位弹簧可以有效避免复杂工况下的窜气现象,常闭侧窜气量随着复位弹簧力的增加而减少。通过试验和仿真方法可以优化电磁阀的动态特性,对双向切换电磁阀的产品设计具有指导意义。

Optimal Design of Reset Characteristics for Two-way Switching Solenoid Valve

The two-way switching solenoid valve is widely used in the air supply system, The valve core initial position directly affects pressure changes of the air supply system. Through test and simulation methods, the two-way switching solenoid valve has the gas channeling phenomenon, which occurs at the deflation first, then power off and then inflation condition, The structure is optimized by installing a reset spring in the back pressure cavity on the normally closed side. The results show that the reset spring designed on back-pressure chamber of the normally closed side can effectively avoid the gas channeling phenomenon under complicated conditions, the amount of the gas channeling on the normally closed side decrease as the reset spring force increases. Meanwhile, the test and simulation can optimize the solenoid valves designs to meet dynamic performance requirements, it has the instructive significance for the solenoid valve design.