Gravity unloading device in assembly and adjusting processes of lightweight parts of spacecraft

Abstract

The invention discloses a gravity unloading device in the assembly and adjusting processes of lightweight parts of a spacecraft. The gravity unloading device comprises a horizontal top plate, an air foot mechanism, a spring mechanism and a protection mechanism, and negative pressure or magnetic adsorption is achieved between the upper part of the air foot mechanism and the lower part of the horizontal top plate; and the air foot mechanism comprises a vacuum negative pressure adsorption unit, a micro-pressure air film drag reduction unit and a fixing frame, wherein the vacuum negative pressureadsorption unit and the micro-pressure air film drag reduction unit are placed on a fixing disc of the fixing frame, and the micro-pressure air film drag reduction unit is placed on the outer side ofthe vacuum negative pressure adsorption unit. According to the gravity unloading device in the assembly and adjusting processes of the lightweight parts of the spacecraft, through a constant force spring system, the gravity balance of the lightweight parts of the spacecraft is achieved, and the technical requirements of gravity unloading in the processes of ground assembly and deployment test of large-size lightweight parts of the spacecraft can be met.

Description

technical field [0001] The invention relates to a gravity unloading device in the process of assembling and debugging aerospace lightweight parts, in particular to a gravity unloading device with two-degree-of-freedom translation characteristics that can automatically balance gravity during the assembling and debugging process of spacecraft lightweight parts The device belongs to the field of spacecraft precision assembly and test engineering. Background technique [0002] When space vehicles such as satellites work in space, they are in a microgravity environment. However, when assembling or engineering tests on the ground, due to the influence of gravity, various components will undergo structural deformation, etc. For space vehicles, especially the large-sized lightweight material components widely used in them, the impact of ground gravity effect will be particularly prominent. Therefore, when large-sized and lightweight space structures are assembled or tested on the ...

AI Technical Summary

Problems solved by technology

Therefore, in the precision assembly of some large-scale lightweight space structures, the additional force required to offset the frictional resistance may be close to or even greater than the load required to balance the gravity, which is not conducive to the precise control of the load during the gravity unloading process; additional The frictional resistance and resistance moment may also cause some kind of mechanical damage to the structural parts with large size, light weight and weak rigidity.

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