Gas supply device and method for multi-working-medium gas micro-flow calibration

Abstract

The invention discloses a gas supply device and method for multi-working-medium gas micro-flow calibration. According to the gas supply device, a gas storage system formed by connecting a plurality of high-pressure gas bottles in parallel is used for providing multiple calibration gases, and the calibration gases conforming to the working medium actual gas can be provided. Through an electrical path converter and a pressure stabilizing system, the inlet and outlet pressure of the calibration gases is ensured, the pressure of the provided calibration gases is consistent with the actual pressure of the working medium gas, the actual work condition is better met, and working medium gas micro-flow calibration is more accurate. By means of the gas supply device and method, the calibration gases conforming to the working medium actual gas can be provided, and meanwhile the pressure of the provided calibration gases is consistent with the actual pressure of the working medium gas; and the gas supply method is simple, feasible and easy to operate.

Description

technical field [0001] The invention relates to the technical field of gas supply, in particular to a gas supply device and a gas supply method used for micro-flow calibration of multi-working medium gas. Background technique [0002] my country's Dongwu platform communication satellite, XY-2 manned space station test satellite and low-Earth orbit gravity gradient satellite have begun to study and use electric propulsion technology as the power system of the satellite to achieve precise control of satellite attitude and orbit. In the process of electric propulsion system development, the precise measurement of the micro-flow of working medium gas is related to the specific impulse and power of the electric propulsion system, thus affecting the total mass, power consumption, life, carrying capacity and economic cost of the spacecraft. At present, the electric propulsion system working medium gas micro-flow gas supply device has the problems that the supplied calibration gas d...

AI Technical Summary

Problems solved by technology

At present, there is a discrepancy between the calibration gas supplied by the micro-flow gas supply device of the working fluid of the electric propulsion system and the actual gas of the working fluid, the pressure of the calibration gas provided by the plenum chamber is inconsistent with the actual pressure of the working fluid, and the purity of the supplied calibration gas cannot meet the calibration requirements During the development process of the DFH-5 platform satellite, there was a phenomenon that the thruster development unit and the storage and supply subsystem development unit had large deviations in the calibration of the micro-flow rate of the working fluid; in the XY-2 test satellite mission, there was The 20% deviation between the micro-flow rate of the working fluid and the thrust inversion flow rate has seriously affected the determination of the parameters of the electric propulsion system and the development of subsequent scientific research model tasks

After analyzing the cause by the electric propulsion research and development unit, the inaccurate micro-flow rate of the working fluid gas caused this problem. Therefore, it is urgent to develop a micro-flow supply device for the working fluid gas in the electric propulsion system, which is used to carry out research on precise calibration technology for the micro-flow rate of the working fluid gas in the electric propulsion system.

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