Fixing device of helium bottle of propulsion system of spacecraft

Abstract

The invention relates to a fixing device of a helium bottle of a propulsion system of a spacecraft. The fixing device of the helium bottle of the propulsion system of the spacecraft is used for the installation design of the helium bottle of the propulsion system and suitable for domestic spacecrafts with spherical helium bottles, such as a navigation satellite, a communication satellite and a lunar exploration satellite. The fixing device of the helium bottle of the propulsion system of the spacecraft comprises a supporting base, a wrapping belt and a locking screw and nut; the supporting base comprises an underframe and a holder and the underframe and the holder are in fixed connection through cross-shaped boards; the holder is a circular ring with an inner inclined strip which extends downward to form into a circular arc shape from the top end of the circular ring to the cross-shaped boards; the number of the cross-shaped boards which are uniformly distributed on the circular ring is more than three; the helium bottle is located in an empty cavity which is formed by the cross-shaped boards and the circular ring and the shape of the helium bottle is matched with that of the empty cavity. The fixing device of the helium bottle of the propulsion system of the spacecraft has the advantages of being independent in installation of the helium bottle, small in influence on installation accuracy and the like of other equipment, free of a degree of freedom in installation of the helium bottle and safe and reliable in installation.

Description

technical field [0001] The invention relates to a fixing device for a helium cylinder of a spacecraft propulsion system, which is used for the installation design of the helium cylinder of the propulsion system, and is suitable for domestic spacecraft with spherical helium cylinders, such as navigation satellites, communication satellites, and probes. lunar satellite etc. Background technique [0002] In previous models of satellites, spherical helium cylinders are generally installed on the partition of the satellite propulsion module through brackets, such as figure 1 shown. When the gas cylinder is subjected to pressure and temperature changes, it will shrink and deform, which will inevitably cause axial expansion and contraction on the installation shaft, so the gas cylinder should have a degree of freedom of movement in the axial direction. According to the test data, there must be a space between the -Y end spherical surface and the bracket to meet the axial expansio...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem in the prior art that the shrinkage and deformation of the gas cylinder will affect the installation accuracy of the equipment on the partition, and propose a fixing device for the helium cylinder of the spacecraft propulsion system, which can avoid helium Bottle vibration causes abnormal response of other equipment and reduces the impact of helium cylinder filling and deflation on other equipment

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