A multiple start system of a liquid rocket engine pneumatic booster

Abstract

The invention relates to a multiple starting system of a pneumatic supercharging device of a liquid rocket engine, which belongs to the design field of a pumping type liquid rocket engine starting system; including two pneumatic supercharging devices, a supercharging gas source, a gas generator, and two turbo pumps , 2 control valves and 2 upward one-way valves; 2 pneumatic booster devices are respectively connected to the pressurized air source; each pneumatic booster device is respectively connected to one end of one control valve and one end of one upward one-way valve; The other ends of the two control valves are connected with the gas generator; the other end of each upward check valve is connected with a turbo pump; the two turbo pumps are connected with the exhaust pipeline of the gas generator; The pneumatic supercharging device and the corresponding turbo pump supply the oxidant; respectively supply fuel to the other pneumatic supercharging device and the corresponding turbo pump; the multi-start system of the pneumatic supercharging device of the present invention has the advantages of simple system, light structure and high working efficiency , The advantages of good consistency in each starting condition and small air consumption.

Description

technical field [0001] The invention belongs to the design field of a pump-pressed liquid rocket engine starting system, and relates to a multiple starting system of a liquid rocket engine pneumatic supercharging device. Background technique [0002] In order to meet the needs of space launch missions such as multi-satellite launch, deep space exploration, and orbital service technology, the main engine of the upper stage needs to have the ability to start more than 20 times. At the same time, in order to reduce the structural quality as much as possible and improve the carrying capacity of the upper stage, the multi-start system of the main engine needs to share the pressurized air source with the attitude control engine. [0003] At present, domestic pump-pressed liquid rocket engines are generally started by propellant starters, which are used to perform one-time or two-start tasks. If more than 20 multiple starts are required, more than 20 propellant starters need to be ...

AI Technical Summary

Problems solved by technology

[0003] At present, domestic pump-pressed liquid rocket engines are generally started by propellant starters, which are used to perform one-time or two-start tasks. If more than 20 multiple starts are required, more than 20 propellant starters need to be installed. Complex system, high structural quality and poor reliability

[0004] In addition, in the development of an upper stage engine with multiple starts, in order to realize the multiple start capability of more than 20 times, a starter box type multiple start system is proposed. However, in this starting method, the starter box needs to be filled repeatedly, causing the engine to start and accelerate slowly. At the same time, the pressure of the starter box is more sensitive to the ambient temperature, resulting in poor consistency of each start.

Images