CN219008118U

CN219008118U - Aircraft fuel tank

Info

Publication number: CN219008118U
Application number: CN202223500487.9U
Authority: CN
Inventors: 王辉; 王武; 李涛; 卢杰; 赵胜海; 任志文; 阙胜才; 田瑞娟; 周昌申; 张艳; 周盛; 胡仁强; 黎艳
Original assignee: Jiangxi Hongdu Aviation Industry Group Co Ltd
Current assignee: Jiangxi Hongdu Aviation Industry Group Co Ltd
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-05-12
Anticipated expiration: 2032-12-28

Abstract

The utility model provides an aircraft fuel tank.A fuel tank filler opening and a fuel tank body are integrally rotationally molded, and a plurality of fixing belts are arranged on the middle section of the fuel tank body and used for fixing the whole fuel tank; the oil tank filler is arranged on the upper end surface of the oil tank body, and the oil tank body is also provided with an oil supply connector, an oil return connector and a vent valve. The utility model overcomes the defects of the prior aircraft fuel tank in terms of cost, weight, batch capacity and the like, and the designed fuel tank has light weight and low cost.

Description

Aircraft fuel tank

Technical Field

The utility model relates to the field of aircraft fuel systems, in particular to an aircraft fuel tank.

Background

At present, the design of the aircraft is advancing towards the directions of light weight, miniaturization, clustering and low cost, and accordingly, the manufacturing and mounting of parts and components in the aircraft are required to have the characteristics of light weight, low cost, rapid mass production and the like.

The fuel tank is used as an important component in the aircraft and is mainly used for storing fuel, and in order to meet the design and manufacturing requirements of the existing aircraft, the fuel tank is also required to have the capabilities of low weight, low cost and rapid mass production in the manufacturing and mounting processes.

The commonly used fuel tanks are classified into metal fuel tanks, composite fuel tanks and rubber fuel tanks according to the materials used. The metal oil tank mainly comprises an aluminum alloy casting oil tank, a plate riveting oil tank, a plate welding oil tank and the like, and has the defects of large weight, high cost and the like, and the oil tank with the plate welding and plate riveting structure has more manufacturing procedures and long manufacturing period, so that the capacity of quick mass production of the oil tank is limited.

The composite fuel tank has light weight, but relatively high cost, and is especially suitable for fuel tanks with complex configuration, and has extremely high cost, long manufacturing period and limited mass production capacity.

The rubber oil tank has light weight and relatively low cost, but has defects in two aspects, namely more working procedures in the manufacturing process and longer period of the installation process in the aircraft; on the other hand, the rubber oil tank is generally formed by overlapping rubber sheets in the manufacturing process, and when the configuration is smaller and the shape is irregular, the tightness and reliability of the overlapping part are difficult to ensure, and the rubber oil tank is not suitable for an aircraft with compact inner space.

Therefore, the fuel tanks used at present have defects in cost, weight, batch capacity and the like due to the limitations of materials, manufacturing process and the like, and cannot meet the capability of low-weight, low-cost and rapid mass production of the aircraft.

Disclosure of Invention

The utility model aims to: in order to overcome the defects of the prior aircraft fuel tank in terms of cost, weight, batch capacity and the like, the utility model provides the fuel tank which is light in weight and low in cost, can be manufactured into various complex configurations, adopts a mature manufacturing process and is convenient to install.

The technical scheme is as follows: an aircraft fuel tank, wherein a fuel tank filler opening and a fuel tank body are integrally rotationally molded, and a plurality of fixing belts are arranged on the middle section of the fuel tank body and used for fixing the whole fuel tank; the oil tank filler is arranged on the upper end surface of the oil tank body, and the oil tank body is also provided with an oil supply connector, an oil return connector and a vent valve.

Furthermore, the oil tank body is formed by rotational molding, the inner layer is made of nylon material, the outer layer is made of crosslinked polyethylene, and the inner layer and the outer layer are bonded through a bonding layer.

Further, the number of the fixing belts is at least two, and the fixing belts are distributed on two sides of the center line of the oil tank body.

Further, screw holes are arranged on the fixing bands, so that the oil tank and external equipment can be conveniently assembled.

Further, a cover is arranged at the oil filling port of the oil tank.

Further, the oil filling port and the ventilation valve of the oil tank are uniformly distributed on the upper end surface of the oil tank body, the oil supply connector is arranged at the lower position of the oil tank body, and the oil return connector is arranged at the upper position of the oil tank body.

Further, the oil tank body is provided with an oil supply joint and an oil return joint, the positions of the oil supply joint and the oil return joint are both provided with grooves, and the two joints are both positioned in the grooves.

The beneficial technical effects are as follows: the fuel tank designed by the utility model has the advantages of low cost of raw materials, simple manufacturing process, short period, light weight, good oil resistance, simple assembly process and capability of rapidly manufacturing various complex configurations by adopting a rotational molding process, and meets the requirements of low weight, low cost and rapid mass production.

Drawings

FIG. 1 is a fuel tank body material composition;

FIG. 2 is a structural component of a fuel tank;

the oil-supply oil-return joint comprises a nylon layer 1, a cementing layer 2, a crosslinked polyethylene layer 3, an oil tank 4, a fixing belt 5, a flap 6, a vent valve 7, screw holes 8, bolts 9, an oil-supply joint 10 and an oil-return joint 11.

Detailed Description

The utility model is further described in detail below with reference to the attached drawings and specific implementation measures:

the fuel tank of the aircraft is shown in figure 1, the material composition of the fuel tank body is formed by rotational molding, the inner layer 1 is made of nylon material, the outer layer 3 is made of crosslinked polyethylene, and the inner layer and the outer layer are bonded through the bonding layer 2.

The structure of the oil tank is shown in fig. 2, two fixing belts 5 are arranged on the oil tank 4, after the oil tank 4 is put into an oil tank cabin in an aircraft body, the oil tank is connected with the oil tank cabin through screw holes 8 on the fixing belts 5 by adopting screws, and the fixing belts 5 are tightly connected with the oil tank 4 through bolts 9; the oil tank 4 is provided with the opening cover 6, and when the oil is filled, the opening cover 6 can be opened to directly fill the oil tank 4 with fuel; in the process of oiling and supplying oil to the oil tank 4, the oil tank 4 is ventilated with the outside through the ventilation valve 7, so that a large pressure difference is prevented from being generated between the oil tank 4 and the outside; during oil supply, the oil tank 4 supplies oil to the outside through the oil supply connector 10, return oil generated in the oil supply process flows back into the oil tank 4 through the oil return connector 11, and the oil supply connector 10 and the oil return connector 11 are rolling wave connectors, so that the oil tank is convenient to be connected with an external pipeline.

The fuel tank designed by the utility model adopts the crosslinked polyethylene as the main raw material, is rapidly molded by a rotational molding process according to a specific fuel tank configuration, and has the advantages of light weight, low raw material and manufacturing cost and simple process. In order to overcome the problem of poor oil resistance of the crosslinked polyethylene, the oil tank adopts a double-layer structure, in the forming process, the inner layer is firstly rotomolded with a thinner nylon impermeable layer, and after the adhesive is coated, the outer layer is rotomolded with the crosslinked polyethylene again to be used as a main structural material.

In order to facilitate the installation, the connection between the oil tank and the aircraft structure is reduced, and the ventilation valve is directly arranged on the oil tank, so that the ventilation requirement of the oil tank is met; the oil filler and the oil tank body are integrally formed by rotational molding, and the oil filler cap can be opened to directly refuel the oil tank during refuelling, so that a fuel oil filling pipeline is not required to be independently designed in the aircraft body; the interfaces of the oil tank external oil supply and oil return pipelines are rolling wave connectors which are in non-threaded connection, so that the pipeline connection operation is convenient in the assembly process; the oil tank adopts the mode of fixed band connection to install to aircraft organism structure in, and in the installation, directly put into aircraft oil tank cabin and fasten with the screw with the oil tank, simple to operate.

The above detailed description or examples are only for illustrating the technical scheme of the present utility model, and are not limiting, and the detailed description is not to be taken as conventional technical means or common general knowledge in the art; those of ordinary skill in the art will appreciate that: based on the design concept of the present application, the technical solutions described in the foregoing embodiments should be adaptively modified, or some or all of the technical features thereof may be equivalently replaced, where these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. The fuel tank of the aircraft is characterized in that a fuel tank filler opening and a fuel tank body are integrally rotationally molded, and a plurality of fixing belts are arranged on the middle section of the fuel tank body and used for fixing the whole fuel tank; the oil tank filler is arranged on the upper end surface of the oil tank body, and the oil tank body is also provided with an oil supply connector, an oil return connector and a vent valve.

2. An aircraft fuel tank as claimed in claim 1, wherein the tank body is formed by rotational moulding, the inner layer is of nylon material, the outer layer is of cross-linked polyethylene, and the inner and outer layers are bonded by a glue layer.

3. An aircraft fuel tank as claimed in claim 1, wherein at least two of said fastening strips are disposed on opposite sides of the tank body centerline.

4. An aircraft fuel tank according to claim 3 wherein screw holes are provided in the fixing strap to facilitate assembly of the tank with external equipment.

5. An aircraft fuel tank as claimed in claim 1, wherein the tank filler outlet is further provided with a flap.

6. An aircraft fuel tank as claimed in claim 5, wherein the fuel tank filler and vent valves are disposed on the upper end surface of the fuel tank body, the fuel supply nozzle is disposed in a lower position of the fuel tank body, and the fuel return nozzle is disposed in an upper position of the fuel tank body.

7. An aircraft fuel tank as claimed in claim 1, wherein the tank body is provided with a recess at each of the fuel supply and return connection points, both of the connection points being located in the recess.