Annular butt joint structure of fuselage with weatherproof composite skin

Abstract

The invention relates to an annular butt joint structure of a fuselage with weatherproof composite skin. The annular butt joint structure is characterized in that a front fuselage skin body and a rear fuselage skin body are respectively borne on upper end faces of two metal machining frames, the metal machining frames are in butt joint, a boss structure is arranged at the position of the joint, the fuselage skin bodies are located on the rear side of a boss to form step difference with the boss, and a gap between the boss and the fuselage skin bodies is filled with sealant. The boss is arranged on the upper end faces of the metal machining frames, wind erosion to the end face of the composite skin can be avoided, protection means of the end face of the composite skin is simplified, and assembling cost of final assembly and partial assembly is lowered.

Description

technical field [0001] The invention relates to a fuselage circumferential butt joint structure, in particular to a fuselage circumferential joint structure with composite material skin anti-corrosion, which belongs to the field of aerospace processing. Background technique [0002] At the connection position of the aircraft fuselage ring, the windward end face of the composite skin is easily eroded by wind, rain, or sand and stones, resulting in delamination of the end face of the skin, resulting in a decrease in structural performance, and in severe cases, structural damage. At present, the commonly used method is to wrap the end face of the composite skin and pneumatically seal the butt joints of the front and rear fuselage sections. The wrapping process is carried out at room temperature. The glue is peeled off or moisture intrudes from the place where the glue is opened. Contents of the invention [0003] The technical problem to be solved by the present invention is...

AI Technical Summary

Problems solved by technology

[0002] At the connection position of the aircraft fuselage ring, the windward end face of the composite skin is easily eroded by wind, rain or sand and stones, resulting in delamination of the end face of the skin, resulting in a decrease in structural performance, and in severe cases, structural damage

At present, the commonly used method is to wrap the end face of the composite skin and pneumatically seal the butt joints of the front and rear fuselage sections. The wrapping process is carried out at room temperature. The glue is peeled off or moisture intrudes from the place where the glue is opened

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