Parallel balanced filling method for high-capacity semi-management surface tension storage tank

Abstract

A parallel balanced filling method for a high-capacity semi-management surface tension storage tank comprises steps as follows: (1) a satellite propellant filling pipeline is connected, and the leakage rate of a filling pipeline system is ensured to meet the requirements; (2) two parallel storage tanks are simultaneously filled with helium or release helium for replacement until sampled gas is tested to be qualified; (3) the propellant filling pipeline and pipelines at the downstream of the parallel storage tanks are vacuumized; (4) valve ports of filling and drainage valves of the parallel storage tanks are filled with the propellant; (5) the parallel storage tanks are simultaneously and stably filled until 90% or above of the rated filling quantity is reached; (6) refilling is performed on the parallel storage tanks until the filling quantity of each storage tank meets the task requirement; (7) air cushions are added to the storage tanks until required air cushion pressure is reached. By means of the method, parallel balanced filling of the high-capacity semi-management surface tension storage tank can be realized, time for filling the parallel storage tanks with the propellant is shortened, and the reliability and the safety of the satellite filling process are guaranteed.

Description

technical field [0001] The invention relates to a large-capacity semi-management type surface tension storage tank parallel balance filling method, which belongs to the spacecraft propulsion technology and is suitable for a spacecraft propulsion system using a large-capacity semi-management type surface tension storage tank. Background technique [0002] For the satellite bicomponent propulsion system with parallel storage tank structure, an important issue is the propellant balance discharge capability, that is, the remaining propellant dose in the parallel storage tanks must be consistent. If the propellant discharge of two parallel storage tanks is unbalanced, when the propellant in one storage tank is emptied, the helium in the storage tank will be discharged if the propellant in one storage tank is emptied, so that the propellant in the propellant pipeline will be entrained. Thrusters and engines fail, the satellite is at the end of its life, and the remaining propellan...

AI Technical Summary

Problems solved by technology

However, there are many factors such as the asymmetry of the upstream and downstream pipeline layout of the two combustion agent storage tanks, the individual differences in the flow resistance of the self-locking valve and the storage tank products, the installation and deformation differences of the storage tanks, the temperature and back pressure differences of the storage tanks during the filling process, and many other factors. Under the joint influence of the two parallel storage tanks, it is difficult to ensure the consistency of the filling volume in the two parallel storage tanks during the filling process

Although the balance of the filling volume in the parallel storage tank can be finally achieved by standing still, the larger the volume of the parallel storage tank, the longer it will take, which is usually unacceptable for launch site filling

[0004] In addition, since the satellite storage tank adopts a semi-management net storage tank, the propellant can only be injected into it at one time, and due to the large volume of the storage tank, the positions of the two parallel storage tanks are usually far away. A large difference in the amount of filling in the tank will lead to eccentricity of the satellite's center of mass. Excessive eccentricity of the center of mass will make the propellant filling process uncontrollable, and the propellant is flammable, explosive, toxic, etc. A slight error will endanger the satellite's safety. Safety, endangering the safety of personnel and plant

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