Gas distribution method and device for spacecraft leak rate detection

Abstract

The invention discloses a gas distribution device for spacecraft leak rate detection, including a gas turbocharger, a pressure transmitter, a filter, a pressure stabilizing chamber, a high pressure reducing valve, a medium pressure reducing valve, a driving air pressure reducing valve, a driving air stop valve, an air intake stop valve, a vacuum stop valve, a safety valve, an unloading valve, a vacuum pump, a pressure gauge and a stainless steel pipe. A gas source inlet is connected with a leak indication gas for leak rate detection. A driver inlet is connected with compressed air to drive thegas turbocharger. The leak indication gas is pressurized through the gas turbocharger, and then enters the pressure stabilizing chamber and a corresponding gas transmission loop. Two channels of highpressure and three channels of low-pressure gas are output through devices such as the pressure reducing valves, a high pressure stop value and the pressure transmitter. The vacuum pump is used for pumping out the gas in a gas transmission pipe to improve the purity of the leak indication gas. The gas distribution device of the invention meets the requirement of spacecraft service life and reliability detection, and can improve the reliability of the charging and discharging process of the leak indication gas, shorten the gas charging and discharging time and reduce the cost of leak rate detection.

Description

technical field [0001] The invention relates to the technical field of non-destructive testing of spacecraft products, in particular, the invention relates to a gas distribution method and device for spacecraft leakage rate detection. Background technique [0002] Leak rate detection is an important test link in the process of spacecraft development, and it is an important indicator of the reliability of spacecraft in-orbit operation. At present, spacecraft leak detection mostly adopts helium mass spectrometry non-vacuum cumulative leak detection method, that is, the spacecraft filled with a certain pressure of leak gas is placed in a leak detection container for accumulation, and the leak gas in the container is detected by leak gas testing equipment Concentration changes, and then calculate the leak rate of the spacecraft. At the same time, before the spacecraft enters the field, a single-point leak rate test must be performed on the propulsion system pipeline. During the...

AI Technical Summary

Problems solved by technology

During the spacecraft leak rate detection process, it is necessary to inflate the spacecraft propulsion system (leakage gas), including high-pressure pipelines and low-pressure pipelines, the inflation process will take up a large part of the time, and there are certain safety risks

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