Small air pillow pressurization system

Abstract

The invention discloses a small air pillow pressurization system. The redundancy design is adopted in the system, and pressurizing magnetic valves are controlled by feedback of storage box pressure under the set timing sequence condition. At the initial stage of starting of an engine, a pressurization controller controls the main pressurizing magnetic valve and the auxiliary pressurizing magnetic valve and monitors the pressure inside a storage box, when the pressure is excessively low, the pressurization controller controls the main pressurizing magnetic valve or the auxiliary pressurizing magnetic valve to be opened and carry out emergent pressurization on the storage box, and therefore the phenomenon that the engine works abnormally due to the fact that the air pillow pressure of the storage box is reduced fast is avoided, the engine can be started smoothly, the single point of failure is avoided, and the reliability of the pressurization system can be effectively improved.

Description

technical field [0001] The invention relates to a small air pillow pressurization system, in particular to a small air pillow storage tank with an emergency start-up function, and belongs to the technical field of propellant management. Background technique [0002] With the development of space transportation, especially the demand for commercial spaceflight, small vehicles that can safely, quickly and maneuverably enter and exit space are one of the important development directions in the future aerospace field. This type of vehicle generally has a relatively compact structure, and the volume of the propellant tank and the initial air pillow of the tank is small. With the start of the engine, the propellant flow rate increases rapidly, which will cause the pressure of the air pillow in the tank to decay rapidly. When the tank When the air pillow pressure is lower than the required lower limit, it may affect the engine operation and even cause premature shutdown. Therefore...

AI Technical Summary

Problems solved by technology

This type of vehicle generally has a relatively compact structure, and the volume of the propellant tank and the initial air pillow of the tank is small. With the start of the engine, the propellant flow rate increases rapidly, which will cause the pressure of the air pillow in the tank to decay rapidly. When the air pillow pressure is lower than the required lower limit, it may affect the engine work and even cause premature shutdown

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