关键词: 电动气动阀;液体推进剂火箭发动机;动态特性;数值计算

Abstract: he mathematic model is built for the attracting process of the electropneumatic valve, numerical calculation of the dynamic characteristics is presented, and the influence of reaction factors on the dynamic characteristics of the valve is analyzed in detail. The calculated results show that the armature of the valve can be attracted more quickly to the minimum width of solenoid air gap after the circuit is turned on and the armature is touched, and to improve the response characteristics of the valve and to prolong the service life of the valve, it is favourable that the inlet pressure of the compressed gas and the precompression of the spring be properly decreased. The conclusions obtained may be used for reference to the design and manufacture of new electropneumatic valves and solenoid valves.

Key words: Electropneumatic valve;Liquid propellant rocket engine;Dynamic characteristic;Numerical calculation