Method and device for improving performance of liquid path management system of spacecraft propulsion system

Abstract

The invention provides a method and device for improving the performance of a liquid path management system of a spacecraft propulsion system. The method which comprise the following steps: 1, connecting two liquid path normally-closed electric explosion valves in parallel at the downstream of each storage tank of a propulsion system adopting parallel storage tanks; 2, arranging two temperature measuring points on the position, close to an electric explosion tube, of a shell of the main electric explosion valve; 3, starting temperature collection at all temperature measuring points on the mainelectric explosion valve before filling a liquid path pipeline; 4, during filling of the liquid path pipeline, exploding the main part electric explosion valve at the downstream of the parallel storage tanks firstly, and synchronously judging the temperature of shells of the liquid path normally-closed electric explosion valves and read; 5, if the temperatures on the measuring points of the two paths of on one certain electric explosion valve are obviously changed, judging that the electric explosion valve is successfully exploded, and if not, judging that the electric explosion valve is notsuccessfully exploded; and 6, if it is determined that one certain electric explosion valve is not subjected to electrically exploded, a command is timely sent to explode the electric explosion valveconnected with the electric explosion valve in parallel.

Description

technical field [0001] The invention relates to a method for supplying a propellant of a dual-component propulsion system of a spacecraft, in particular to a method and a device for improving the performance of a liquid path management system of a spacecraft propulsion system. Background technique [0002] In the dual-component propulsion system of spacecraft, the combination of methylhydrazine / nitrogen tetroxide pyrophoric propellant is usually used. These two fuels are liquid at room temperature and have the characteristics of spontaneous combustion, explosion, and toxicity after mixing, so leakage is not allowed . If the oxidant and fuel contact in the non-working state, they will directly burn and explode, which poses a great threat to the safety of products, equipment and personnel on the ground. Therefore, various safety measures are attached great importance to in use. In order to improve the safety and reliability during propellant filling, during storage after fill...

AI Technical Summary

Problems solved by technology

In order to eliminate the single-point failure that the electric explosion valve cannot be opened with a small increase in the structural mass, a bridge electric explosion valve is added, that is, plan E. However, it is found in actual use that if a certain electric explosion valve does not detonate normally , it cannot meet the requirement of balanced discharge accuracy of parallel storage tanks

In order to pursue higher reliability, plan F is adopted in some occasions. In actual use, if high balanced discharge accuracy is required, all parallel electric explosion valves should be detonated or only one electric detonation valve downstream of each storage tank should be detonated (taken 1), but in fact, there is no guarantee of 100% successful detonation

If a certain electric explosion valve does not detonate normally, when the proportion of the electric explosion valve flow resistance in the hydraulic system cannot be ignored, it is impossible to solve the problem of high requirements on the balanced discharge accuracy of parallel storage tanks and the system mixing ratio accuracy

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