CN110498053B

CN110498053B - New oil tank with vertical limit compression

Info

Publication number: CN110498053B
Application number: CN201910918332.0A
Authority: CN
Inventors: 李东妮; 李承彬; 上官凯威; 冯茂龙; 李永明; 周仁福
Original assignee: Hubei Yueyan Technology Co ltd
Current assignee: Hubei Yueyan Technology Co ltd
Priority date: 2019-09-26
Filing date: 2019-09-26
Publication date: 2025-02-14
Anticipated expiration: 2039-09-26
Also published as: CN110498053A

Abstract

The invention relates to a novel oil tank with vertical limiting compression, which is formed by adding a corresponding limiting device to a flexible oil tank which is compressible in the height direction. The device consists of an oil tank shell, a compression limiting device and a compressible soft oil tank; the oil tank is stable and controllable in gravity center from a full-oil state to an oil-free state, can reduce the influence of fuel sloshing on the gravity center by more than 90%, and creates a new scheme for the fuel oil tank of the small aircraft.

Description

Novel oil tank with vertical limiting compression function

Technical Field

The invention relates to an aviation onboard oil tank, in particular to a novel compressed oil tank with vertical limiting, which is provided with a novel volume-adjustable gravity center and is stable and controllable.

Background

Aircraft fuel tanks are important structural components of modern aircraft and are mainly used for storing fuel required by aircraft flight. The soft oil tank, the hard oil tank and the integral oil tank can be divided into three types according to different structural forms. The main characteristic of the soft oil tank is that it can fully utilize the available space of various shapes in the aircraft, increase the oil storage, and the structure is simple, it is not affected by vibration, and it is not easy to produce cracks or damage. The hard oil tank is mainly used for a high-temperature area in the machine body and a position where the oil tank cabin cannot bear the internal pressure. The integral oil tank is an oil tank formed by utilizing a part of structures of wings or a fuselage body, can obviously reduce the weight of a fuel system, fully utilizes the internal space of the fuselage, and is widely applied to modern aircrafts.

The main oil tank of civil aircraft mostly adopts an integral oil tank, and the oil tank is directly formed by utilizing structural elements of a fuselage and wings. The internal structures or the fuselage structures of the wings at two sides can be used as structural oil tanks. And a baffle plate is arranged in each oil tank to prevent fuel sloshing caused by the change of the flight attitude of the aircraft, and a baffle type one-way valve is arranged on the baffle plate to prevent the oil in the oil tank from moving from the wing root to the wing tip when the aircraft is in maneuvering flight, so that the oil is allowed to flow from the wing tip to the wing root. An aircraft typically uses an "open-ventilation system" to allow the oil-free space above each fuel tank face to communicate with the outside atmosphere, avoiding large pressure differentials between the inside of the fuel tank and the outside atmosphere over the entire aircraft's flight envelope, resulting in very large forces acting on the fuel tank structure. In addition, a plurality of dipsticks are arranged below each main oil tank, the oil quantity in the oil tank is checked, an ejector pump is arranged in each oil tank compartment, and when an engine works, the fuel oil of each oil tank is called through a fuel oil pipeline according to a certain sequence.

In the design of small aircraft fuel tanks, limited by volume, weight and system complexity, the fuel system is relatively simple, and in the past small aircraft designs, plastic fuel tanks, rubber and soft fuel tanks, etc. with smaller volumes are widely used. The effective oil carrying capacity of the aircraft directly influences the endurance mileage index of the aircraft, and along with the continuous expansion of the application of a small-sized flying platform, the requirements on the flight endurance time, the endurance mileage and the carrying capacity are also continuously improved, so that the larger oil carrying capacity is required, the maximum oil carrying capacity of the fuel oil can be up to more than 40% of the total take-off weight, the influence of the fuel oil sloshing on the whole gravity center is great when the flying posture is changed, and the problems of stability, operability, safety and the like are brought, so that the fuel tank of the small-sized aircraft is a main problem of large-sized fuel tank at present.

Disclosure of Invention

The invention aims to seek an innovative design idea to design an oil tank of a small aircraft, and to design a novel vertical limit compression oil tank with stable gravity center, large oil storage capacity, simple and reliable structure, light weight and low cost by utilizing the sought innovative design idea.

The technical scheme for achieving the purpose of the invention is to design a novel oil tank with vertical limiting compression and design a corresponding compression limiting device, so as to control the gravity center position and gravity center stability of the oil tank from a full oil state to a near oil-free state. The novel oil tank with vertical limiting compression comprises an oil tank shell 1, a compression limiting device 2 and a compressible soft oil tank 3, wherein the oil tank shell 1 comprises a shell assembly 11 with an open upper part and guide rails 13 fixed at two ends of the shell assembly 11, the compressible soft oil tank 3 is arranged in the shell assembly 11, the compression limiting device 2 is pressed on the compressible soft oil tank 3, the compression limiting device 2 comprises a power device, a pressing plate 21 and two sliding blocks 22, the two sliding blocks are respectively fixed at two ends of the pressing plate 21 and are in sliding connection with the guide rails 13, the power device applies downward force to the pressing plate 21, and the sliding blocks 22 at two sides of the pressing plate 21 synchronously move.

The present invention can also employ the following technical measures for achieving the object of the present invention.

The novel oil tank with vertical limiting compression comprises three gears, two locking devices 24, two racks 12 and two torsion springs 25, wherein the three gears comprise a first gear 23 and two second gears 27 symmetrically distributed at two ends of a shaft of the first gear 23, the second gears 27 are meshed with the racks 12 fixed at two ends of a shell assembly, the two locking devices 24 are fixed at two ends of a pressing plate and respectively fixedly lock one end of one torsion spring 25, and the other end of the torsion spring 25 is connected with the first gear positioned in the middle.

The novel oil tank with vertical limiting compression function is characterized in that the compressible soft oil tank 3 consists of a soft oil tank 31, an oil delivery conduit 32 and an oil injection pipe 33.

The novel oil tank with vertical limiting compression function is characterized in that the soft oil tank is made of three layers of materials, wherein the inner layer and the outer layer are made of PVC materials capable of resisting corrosion of fuel oil, the middle layer is made of nylon fiber reinforced rubber materials, and the outer layer is coated with a polytetrafluoroethylene film.

The invention has the positive effects that:

The invention seeks to provide an innovative design thought of the oil tank design, designs a novel vertical limiting compression oil tank scheme with stable gravity center and large oil storage capacity, creates a new path for the design of the fuel oil tank of the small aircraft, and provides assistance for prolonging the endurance mileage of the small aircraft.

The invention expands the application range of the soft oil tank;

the invention creates a new thought and a new method for inhibiting the fuel oil sloshing gravity center change of the fuel oil cabin;

The oil cabin is stable and controllable in gravity center from a full oil state to an oil-free state, and the influence of fuel sloshing on the gravity center can be reduced by more than 90%.

The oil tank of the invention improves the stability of the gravity center and allows the aircraft to carry more fuel.

The oil tank can compress the height of the soft oil tank to about 10% of the original height, has small residual oil quantity and improves the effective oil carrying quantity.

The oil tank has the advantages of light weight, stable operation and good reliability.

According to the scheme of the oil tank, the oil tank is free of air, the oxygen content of the fuel oil can be controlled at a lower level, deflagration is not easy to occur, the safety is good, and the long-term storage is resistant.

Drawings

In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments that are illustrated in the appended drawings, in which:

FIG. 1 is a state diagram of a novel vertical limit compression oil tank of the present invention when full;

FIG. 2 is a state diagram of the novel vertical limit compression of half oil in an oil tank according to the present invention;

Fig. 3 is a schematic structural view of a novel vertical limited compression oil tank according to an embodiment of the present invention.

[ Main element symbols description ]

1 Casing body

11 Housing Assembly

12:

13 guide rail

2, Compressing and limiting device

21 Pressing plate

22 Slider

23 First gear

24 Locking device

25 Torsion spring

26 Bearing seat

27 Second gear

3 Compressible soft oil tank

32 Oil delivery conduit

33 Oil filler pipe

Detailed Description

In order to further describe the technical means and effects adopted by the invention to achieve the preset aim, the following detailed description refers to the specific implementation, structure, characteristics and effects of the novel vertical limit compression oil tank according to the invention with reference to the accompanying drawings and the preferred embodiments.

Referring to fig. 1-2, a schematic diagram of a novel vertical limit compression oil tank according to the present invention is shown, the vertical limit compression oil tank includes an oil tank housing 1, a compression limiting device 2, and a compressible soft oil tank 3, the compressible soft oil tank is compressible in a height direction, wherein the oil tank housing 1 includes a housing assembly 11 with an open upper portion and guide rails 13 fixed at two ends of the housing assembly 11. The compressible soft body oil tank 3 is placed in the housing assembly 11, and the compression limiter 2 is pressed against the compressible soft body oil tank 3, applying pressure to the compressible soft body oil tank 3 from the top.

The compressing and limiting device 2 comprises a power device, a pressing plate 21 and two groups of sliding blocks 22, wherein the two groups of sliding blocks 22 are respectively fixed at two ends of the pressing plate 21 and are in sliding connection with the guide rail 13. The power device applies downward force to the pressing plate 21 and enables the sliding blocks on two sides of the pressing plate 21 to synchronously move. Under the action of the power unit, the pressing plate 21 is pressed against the compressible soft oil tank 3, so that the length of the space where the compressible soft oil tank 3 is located is matched with the internal fuel stock. When the amount of oil in the height-direction compressible soft oil tank 3 decreases, the pressing plate 21 moves downward, so that the interior of the compressible soft oil tank 3 is still in an oil-filled structure, the position and shape are limited, and the gravity center does not change during sloshing, thereby controlling the gravity center change of the oil tank.

Referring to fig. 3, a schematic structural diagram of a novel vertical limit compression oil tank according to an embodiment of the present invention is shown, in which the power device includes three gears, two racks 12, two locking devices 24, two torsion springs 25 and two bearing seats 26. Of the three gears, one first gear 23 located in the center of the shaft and two second gears 27 distributed at both ends of the shaft are included. Two said bearing blocks 26 are fixed at both ends of the pressing plate 21 and are provided with bearings for supporting the second gears 27 at both ends. The two racks 12 are respectively fixed at two ends of the housing assembly 11 and meshed with second gears 23 at two ends.

Two locking devices 24 are fixed at two ends of the pressing plate 21, each locking device 24 has a fixed locking function on one end of a torsion spring 25, and the other end of the torsion spring 25 is fixed on the first gear 23 in the middle.

The torsion spring 25 drives the first gear 23 to generate a rotation trend, so that the pressing plate 21 generates downward pressure on the compressible soft oil tank 3, the torsion spring 25 drives the first gear 23 to rotate along with the reduction of oil consumption, the first gear 23 drives the second gear 27 to rotate, the pressing plate 21 synchronously moves downwards along the guide rails at the two ends, and the oil in the compressible soft oil tank 3 does not have redundant space to shake, so that the gravity center of the oil cabin is unchanged.

The compressible soft oil tank 3 consists of a soft oil tank 31, an oil delivery conduit 32 and an oil injection pipe 33. The soft oil tank 31 is made of three layers of materials, the inner layer and the outer layer are made of PVC materials which can resist corrosion of fuel oil, the middle layer is made of rubber materials reinforced by nylon fibers, the soft oil tank 31 has certain strength and rigidity, and the outer layer is coated with a polytetrafluoroethylene film to reduce friction force between the soft oil tank 31 and the oil tank shell 1 and prevent friction damage.

While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.

Claims

1. A novel oil tank with vertical limit compression, characterized in that it comprises an oil tank shell (1), a compression limit device (2) and a compressible soft oil tank (3),

The oil tank shell (1) comprises a shell assembly (11) with an open upper portion and guide rails (13) fixed at both ends of the shell assembly (11);

The compressible soft oil tank (3) is placed in the housing assembly (11), and the compression limit device (2) is pressed on the compressible soft oil tank (3);

The clamping and limiting device (2) comprises a power device, a pressure plate (21) and two sliders (22), wherein the two sliders are respectively fixed at two ends of the pressure plate (21) and are slidably connected to the guide rail (13), and the power device applies a downward force to the pressure plate (21) and causes the sliders (22) on both sides of the pressure plate (21) to move synchronously;

The power device comprises three gears, two locking devices (24), two racks (12) and two torsion springs (25); the three gears comprise a first gear (23) and two second gears (27) symmetrically distributed at both ends of the shaft of the first gear (23); the second gears (27) mesh with the racks (12) fixed at both ends of the housing assembly;

The two locking devices (24) are fixed at both ends of the pressure plate, and respectively fix and lock one end of a torsion spring (25), and the other end of the torsion spring (25) is connected to the first gear;

The compressible soft oil tank (3) is composed of a soft oil tank (31), an oil delivery conduit (32) and an oil filling pipe (33).

2. The new type of oil tank with vertical limit compression according to claim 1 is characterized in that: the soft oil tank is made of three layers of materials, the inner and outer layers are made of PVC material resistant to fuel corrosion, the middle layer is made of nylon fiber reinforced rubber material, and the outer layer is covered with polytetrafluoroethylene film.