Abstract
As one of the key step of spacecraft propulsion system assembly, globe-cone joint assembly determines the spacecraft’s high reliability and long life on orbit. Through test, simulation analysis and calculation on sealing mechanism of globe-cone joint, in this paper, we make sure the relationship of the tightening torque and globe-cone joint contact stress and contact area, and obtain assembly torque range of different specifications of globe-cone joint, which gives necessary reference for mechanical environment verification.
Highlights
Propulsion system is the most important subsystem of spacecraft, its performance directly influence control precision, reliability and life on orbit
The propulsion system consists of thruster, propellant tank, latching valve, fill/drain valve, pressure sensor, filter, etc
The propellant is transported by been pushed in pipeline, so, propulsion system has high pressure inside
Summary
Propulsion system is the most important subsystem of spacecraft, its performance directly influence control precision, reliability and life on orbit. The propulsion system consists of thruster, propellant tank, latching valve, fill/drain valve, pressure sensor, filter, etc. The propellant is transported by been pushed in pipeline, so, propulsion system has high pressure inside. The way of welding is adopted in pipeline connecting, while globe-cone joint is adopted between pipeline and thruster, which have cone surface on thruster and globe surface on pipeline, and this way connecting is widely used on DFH(Short for Dongfanghong)-3 satellite platform, DFH-4 satellite platform, remote sensing satellite platform and navigation satellite platform. The tightening torque is one of the factors to affect the globe-cone joint assembly performance. This paper gives the minimum and maximum torque value during certain type of globe-cone joint assembly, which provides necessary parameters for further research to satisfy mechanical environment
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