关键词: 停车;可变推力;液体推进剂火箭发动机

Abstract: In view of the disadvantages of integral pintle-valve,based on the analysis of the force acting on the integral pintle-valve of injector and the controller, a new injector was designed in which propellant is used as hydraulic fluia for driving the pintle-valve.And,the problem of the shut down of the variable thrust liquid rocket engine with controllable venturi and injector was settled effectively.The results of test has shown that two components of the propellant can be shut-off completely,and that response at starting closing and the dynamics of the engine are quick.

Key words: Shutdown;Variable thrust;Liquid rocket engine