面向飞机刹车压力伺服阀的电磁切断阀开启特性优化研究

Reaserch on Opening Characteristics Optimization of Solenoid Shut-off Valve for Aircraft Brake Pressure Servo Valve

电磁切断阀是飞机刹车系统的重要组成部分,电磁切断阀的动态响应对刹车压力快速控制有着重要影响。通过构建电磁切断阀AMESim模型,利用仿真分析研究切断阀的动态响应特性,并找出主要影响因素;为解决切断阀开启过程中负载腔出现的压力振荡现象,通过活塞左端油路添加节流阻尼孔、主阀芯重叠处开先导槽两种优化结构进行仿真分析,发现增加节流阻尼孔,能够降低压力振荡的最大压力值,但是会延长压力上升时间;而阀芯重叠处开先导槽的方法尽管对于压力振荡基本没有影响,但能在一定程度上缩短压力上升时间,加快压力响应,进而实现更快速的刹车压力控制。

The solenoid shut-off valve is an important component of the aircraft brake system. The dynamic response of the solenoid shut-off valve has an important influence on the rapid brake pressure control. By building AMESim model of the solenoid shut-off valve, this paper analyzes the dynamic response characteristics of solenoid shut-off valve and the main factors affecting the dynamic performance. In addition, to solve the pressure oscillation phenomenon in the process of opening shut-off valve, two structural optimization methods are simulated and compared that one is to add the orifice on the oil circuit, and the other is to add the pilot groove at overlap of the valve. It is found that increasing the orifice can reduce amplitude of pressure oscillation, but increase the time of pressure rise. Although the pilot groove at overlap of the valve has no effect on pressure oscillation, it can reduce the pressure rise time to a certain extent, which will speed up the pressure response and achieve fast brake pressure control.