A protective cover for wing fuel tank and its forming process

A technology for wing fuel tanks and flaps, which is applied in the directions of wings, aircraft parts, aircraft accessories, etc., can solve the complex structure of the inner flap and the outer flap, high manufacturing process and assembly process requirements, and incomplete elimination of risks, etc. problem, to achieve the effect of simple structure, low production cost and high production efficiency

Active Publication Date: 2018-06-29
BEIJING AERONAUTIC SCI & TECH RES INST OF COMAC +1
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A protective cover for wing fuel tank and its forming process
  • A protective cover for wing fuel tank and its forming process
  • A protective cover for wing fuel tank and its forming process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] like Figure 1-3 As shown, a wing fuel tank cover includes a cover body, the cover body and the clamping pressure ring 4 clamp the skin 5, the cover body includes a protective layer 1 and a reinforcement layer 2 inside the protective layer 1, and the protective layer 1. It is used to prevent lightning and fire. Specifically, the protective layer 1 includes a carbon fiber layer and a metal mesh layer, and the metal mesh layer is coated on the carbon fiber layer, wherein the metal mesh layer is a copper mesh, and the resistivity of the copper mesh is small, and the price is moderate; The reinforcement layer 2 is made of polyethylene fiber, which is used to resist the impact of external objects, and still maintains its own mechanical properties in a humid environment. In addition, polyethylene fiber has a low thermal conductivity, which plays a role of heat insulation and fire prevention. It also has good anti-corrosion performance, which can effectively prevent the enviro...

Embodiment 2

[0037] The structure of this embodiment is basically the same as that of the protective flap of the wing fuel tank in Embodiment 1, including the flap body, the flap body and the clamping pressure ring 4 clamping the skin 5, and the flap body includes the protective layer 1 and the protective layer 1 The inner reinforcement layer 2, the protective layer 1 is used for lightning protection and fire prevention, and the reinforcement layer 2 is made of polyethylene fiber, which is used to resist the impact of external objects.

[0038] The difference is that the specific shape of the cover body is not limited, and the specific structure and material of the protective layer 1 are not limited, as long as the cover body can play an excellent role in impact resistance.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

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...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): B64C1/14B64C3/34B29C70/36
CPCY02T50/40
Inventor 孙见卓赵群辛朝波高举斌李星刘传军
Owner BEIJING AERONAUTIC SCI & TECH RES INST OF COMAC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products