A protective cover for wing fuel tank and its forming process

Abstract

The invention discloses a wing fuel tank protective cap and a forming process thereof and relates to the technical field of transportation. The wing fuel tank protective cap comprises a cap body; the cap body and a clamping pressure ring clamp skin; the cap body comprises a protective layer and a reinforcement layer inside the protective layer; the protective layer is used for preventing lightning and fire; the reinforcement layer is made of polyethylene fibers and used for achieving the function of resisting outer object impact. According to the forming process of the wing fuel tank protective cap, the wing fuel tank protective cap is formed through a resin transfer molding forming process by preparing corresponding materials. According to the wing fuel tank protective cap and the forming process thereof, the problems in the prior art that a wing fuel tank cap is complex in structure, poor in shock resistance, seriously affected by environmental factors, low in production efficiency and high in cost can be solved.

Description

technical field [0001] The invention relates to the technical field of transportation, in particular to a wing oil tank protective port cover and a forming process thereof. Background technique [0002] On the lower wing of civil aircraft, inspection ports are arranged along the wingspan direction for personnel to enter and exit, so as to ensure daily maintenance needs. The access cover is an important part of the fuel tank structure and is used to accurately ensure the wing profile. At the same time, because most of the access covers are located in the fuel tank area, the sea trial department has very strict requirements on the impact resistance, fire performance, and lightning protection performance of the access covers. [0003] Patent US20130338973A1 proposes a double-layer clip-on flap, which consists of an inner flap and an outer flap, which work together to meet functional requirements. Although the anti-shock performance is improved, the structure of the inner cove...

AI Technical Summary

Problems solved by technology

Although the anti-shock performance is improved, the structure of the inner cover and the outer cover is relatively complicated, and they need to be manufactured separately, and the requirements for the manufacturing process and assembly process are relatively high, and the cost increases

[0004] Existing covers basically include an impact-resistant layer and a filling layer. In order to improve the impact resistance, a cover structure with Kevlar fiber structure (honeycomb, laminate) can be used as an impact-resistant material, but when it is exposed to a humid environment, Significant impact on performance, additional protection against moisture is required, but the risk is not completely eliminated

Foam is an effective lightweight filling material suitable for filling inside hollow structures to increase structural rigidity, but traditional open-cell foams have a certain moisture storage capacity, which may cause the flap to increase in weight during use

[0005] Therefore, there are certain hidden dangers in the various aspects of the performance of the mouth cover in the prior art, and it is urgent to improve the existing mouth cover to eliminate its shortcomings.

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