CN213502933U - Fuel tank for fixed-wing aircraft - Google Patents
Fuel tank for fixed-wing aircraft Download PDFInfo
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- CN213502933U CN213502933U CN202020865121.3U CN202020865121U CN213502933U CN 213502933 U CN213502933 U CN 213502933U CN 202020865121 U CN202020865121 U CN 202020865121U CN 213502933 U CN213502933 U CN 213502933U
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Abstract
An embodiment of the utility model provides a fuel tank for fixed wing aircraft, include: a first section of housing; the second section of shell is spliced with the first section of shell; the third section of shell is spliced with the second section of shell; the first section of shell is radially sealed and is in plug-in connection with the second section of shell through a first butt-joint frame, and the second section of shell is radially sealed and is in plug-in connection with the third section of shell through a second butt-joint frame. The utility model discloses a bulk rigidity is high, light in weight for fixed wing aircraft's fuel tank.
Description
Technical Field
The utility model relates to an aircraft technical field especially indicates a fuel tank for fixed wing aircraft.
Background
The auxiliary fuel tank is a fuel tank which is hung below the fuselage or wing of the aerospace craft, is thick in the middle and has two sharp ends in a streamline shape. The auxiliary fuel tank is hung, so that the voyage and the endurance time of the airplane can be increased, and the auxiliary fuel tank can be thrown away when the airplane is in necessary air battle, so that the airplane can be put into battle with better maneuverability.
In addition to the non-disposable fuel reservoir designed to match the shape of the fuselage in the early days, the fuel reservoir has a streamlined exterior design as the main design direction, so as to reduce the generated drag, negatively affect the mobility and stability of the aircraft, and reduce the impact on other carrying equipment or fuselage structures when the fuel reservoir is separated from the aircraft. Some auxiliary fuel tanks have small fixed wings for balancing at the tail, which is useful for achieving the above-mentioned purpose.
Although most fuel tanks take a streamlined shape, some are designed with a relatively flat curve in the central portion rather than a circular arc, especially in the case of a fuel tank with a large capacity, which requires a suitable safety distance from the ground for carrying under the belly.
The materials used for the secondary fuel tank at present comprise wood, bamboo, paper fiber and aluminum alloy, and the proportion of the paper fiber, the stainless steel and the aluminum alloy used is higher after the middle period of world war. After the jet age, aluminum alloys have become a widely considered target due to the speed and the forces generated on fuel tanks during flight.
The fuel tank of the traditional airplane adopts a metal light shell welding structure, the weight of the shell of the fuel tank is heavier, the rigidity of the fuel tank is problematic, the quality of a welding seam of the metal structure is difficult to guarantee, the performance after welding is lower, and the fuel tank is not beneficial to lifting the range of the aircraft.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a fuel cell for fixed wing aircraft, solved among the prior art fuel cell weight big, rigidity low, the performance low, influence aircraft range scheduling problem.
In order to solve the technical problem, the technical scheme of the utility model as follows:
a fuel tank for an aircraft, comprising:
a first section of housing;
the second section of shell is spliced with the first section of shell; and
the third section of shell is spliced with the second section of shell;
the first section of shell is radially sealed and is in plug-in connection with the second section of shell through a first butt-joint frame, and the second section of shell is radially sealed and is in plug-in connection with the third section of shell through a second butt-joint frame.
Optionally, the first section of shell and the second section of shell are radially connected in a sealing manner through self-sealing bolts; the second section of shell and the third section of shell are radially connected in a sealing mode through self-sealing bolts.
Optionally, at least one first L-shaped reinforcing frame is arranged in the first section of the shell in the circumferential direction.
Optionally, at least one second L-shaped reinforcing frame and at least one third L-shaped reinforcing frame are circumferentially arranged in the second-section shell.
Optionally, two second L-shaped reinforcing frames and two third L-shaped reinforcing frames are circumferentially arranged in the second section of the shell;
the two second L-shaped reinforcing frames are arranged at intervals, the two third L-shaped reinforcing frames are arranged at intervals, and the two third L-shaped reinforcing frames are positioned between the two second L-shaped reinforcing frames.
Optionally, a first lifting point is arranged between the two third L-shaped reinforcing frames on the second section of the shell.
Optionally, a thickened area is arranged at the position where the first lifting point is located on the second section of the shell.
Optionally, a first stringer is radially arranged in the second section of the shell, and the first stringer penetrates through the thickened area.
Optionally, at least one L-shaped reinforcing frame is circumferentially arranged in the third-section shell.
Optionally, the at least one L-shaped reinforcing frame includes: the second L-shaped reinforcing frame is arranged on the second side of the second frame.
Optionally, a second lifting point is arranged between the fourth L-shaped reinforcing frame and the fifth L-shaped reinforcing frame on the third section of the casing.
Optionally, a second stringer is longitudinally arranged in the third section of the shell, and the second stringer is crossed with the fourth L-shaped reinforcing frame and the fifth L-shaped reinforcing frame.
Optionally, at least one double-T-shaped reinforcing frame is further arranged on the third section of the shell.
Optionally, the at least one double-T reinforcing frame includes: the reinforcing frame comprises a first double-T reinforcing frame and a second double-T reinforcing frame which is arranged at intervals with the first double-T reinforcing frame.
The above technical scheme of the utility model at least include following beneficial effect:
in the above aspect of the present invention, a fuel tank for an aircraft includes a first section of housing; the second section of shell is spliced with the first section of shell; the third section of shell is spliced with the second section of shell; the first section of shell is radially sealed and is in plug-in connection with the second section of shell through a first butt-joint frame, and the second section of shell is radially sealed and is in plug-in connection with the third section of shell through a second butt-joint frame. The first section shell, the second section shell and the third section shell of the fuel tank are all made of carbon fiber composite skins, the shells in sectional design are butted by butt-joint frames, reinforcing frames are arranged in the circumferential direction of each section of shell, stringers are arranged in the radial direction of each section of shell, the cabin section is easy to integrally design and manufacture, the overall rigidity is high, the weight is light, the structure is simple, the production period is short, the cost is low, the sealing characteristic of the box body is easy to guarantee, the manufacturability is strong, the adaptability to severe environments such as salt fog is strong, and the.
Drawings
FIG. 1 is an overall block diagram of a fuel tank for a fixed wing aircraft according to the present invention;
fig. 2 is a first cutaway view of the fuel tank for a fixed-wing aircraft of the present invention;
FIG. 3 is a second cutaway view of the fuel tank for a fixed wing aircraft of the present invention;
FIG. 4 is a block diagram of a first section of a housing of a fuel tank for a fixed wing aircraft of the present invention;
FIG. 5 is a block diagram of a second section of the housing of the fuel tank for a fixed wing aircraft of the present invention;
FIG. 6 is a block diagram of a third section of the housing of the fuel tank for a fixed wing aircraft of the present invention;
fig. 7 is a block diagram of the annular frame of the fuel tank for a fixed wing aircraft of the present invention.
Description of reference numerals:
1-a first section of a housing; 2-a second section of shell; 3-a third section of shell; 4-a first L-shaped reinforcement frame;
5-a first docking frame; 21-a first hoisting point; 31-a second lifting point; 6-a second L-shaped reinforcement frame;
7-a third L-shaped reinforcement frame; 8-a second docking frame; 9-a fourth L-shaped reinforcement frame;
10-a fifth L-shaped reinforcement frame; 11 a first double-T reinforcing frame; 12-a second double T-shaped stiffening frame;
13 a first stringer; 14-second stringer.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
As shown in fig. 1 to 3, an embodiment of the present invention provides a fuel tank for a fixed-wing aircraft, including: a first section of housing 1; the second section of shell 2 is spliced with the first section of shell 1; and a third section of shell 3 inserted with the second section of shell 2; the first section of shell 1 is radially sealed and is connected with the second section of shell 2 in an inserting mode through a first butt joint frame 5, and the second section of shell 2 is radially sealed and is connected with the third section of shell 3 in an inserting mode through a second butt joint frame 8.
In the embodiment, the first section shell 1, the second section shell 2 and the third section shell 3 of the fuel tank are all made of carbon fiber composite skins, the shells in segmented design are butted by adopting the butt frames, the annular direction of each section of shell is provided with the reinforcing frame and the radial direction of each section of shell is provided with the stringers, the cabin section is easy to integrally design and manufacture, the integral rigidity is high, the weight is light, the structure is simple, the production period is short, the cost is low, the sealing property of the box body is easy to ensure, the manufacturability is strong, the adaptability to severe environments such as salt fog is strong.
In an optional embodiment of the present invention, the first section of the shell 1 and the second section of the shell 2 are radially connected by a self-sealing bolt; the second section of shell 2 and the third section of shell 3 are connected in a sealing mode through self-sealing bolts in the radial direction.
In this embodiment, when the first section of the casing 1 is inserted into the second section of the casing 2, a middle-coated high-strength adhesive may be used for insertion, and a self-sealing bolt may be used for connection in the radial direction. When the second section of shell 2 is spliced with the third section of shell 3, a middle-coating high-strength adhesive is specifically used for splicing, and the second section of shell is radially connected with the third section of shell by using self-sealing bolts.
In an optional embodiment of the present invention, as shown in fig. 2, fig. 3 and fig. 4, at least one first L-shaped reinforcing frame 4 is further disposed in the first section of the casing 1. In this embodiment, a first L-shaped reinforcing frame 4 is installed inside the first stage casing 1 to enhance the hoop rigidity and improve the overall fuel tank strength. The first L-shaped reinforcing frame 4 and the first butt-joint frame 5 can be installed in the first section of shell 1 in a co-curing mode; the first L-shaped reinforcing frame 4 and the first section of the shell 1 are integrally manufactured, so that the production is easy and the cost is low.
In addition, the first section of the shell 1 can be of a carbon fiber composite thin-wall structure with a light shell structure, the whole shell is integrally manufactured, and the thickness of the skin can be about 2 mm.
In an alternative embodiment of the present invention, as shown in fig. 2, fig. 3 and fig. 5, at least one second L-shaped reinforcing frame 6 and at least one third L-shaped reinforcing frame 7 are circumferentially disposed in the second casing 2. In this embodiment, a second L-shaped reinforcing frame 6 and a third L-shaped reinforcing frame 7 are installed inside the second-stage casing 2 to enhance the hoop rigidity and improve the overall fuel tank strength.
In an alternative embodiment of the present invention, as shown in fig. 1, fig. 2 and fig. 3, two second L-shaped reinforcing frames 6 and two third L-shaped reinforcing frames 7 are annularly disposed in the second section of the casing 2; the two second L-shaped reinforcing frames 6 are arranged at intervals, the two third L-shaped reinforcing frames 7 are arranged at intervals, and the two third L-shaped reinforcing frames 7 are located between the two second L-shaped reinforcing frames 6. And a first lifting point 21 is arranged between the two third L-shaped reinforcing frames 7 on the second section of the shell 2. The second section of the housing 2 has a thickened area at the position of the first hanging point 21.
In this embodiment, the first lifting point 21 is disposed between the two third L-shaped reinforcing frames 7, the second L-shaped reinforcing frame 6 and the third L-shaped reinforcing frame 7 play a role of dispersing the concentration force borne by the first lifting point 21, the position where the first lifting point 21 is located has a thickened area, so as to ensure the strength and rigidity of the casing where the first lifting point 21 is located, and ensure the stability of the hanging connection when the first lifting point 21 is hung on an aircraft, and the second L-shaped reinforcing frame 6 and the third L-shaped reinforcing frame 7 are integrally manufactured with the second section casing 2, so that the production is easy and the cost is low.
In an alternative embodiment of the present invention, as shown in fig. 3, a first stringer 13 is radially disposed in the second casing 2, and the first stringer 13 passes through the thickened area. The rigidity of the fuel tank case is further ensured.
In this embodiment, the second L-shaped reinforcing frame 6, the third L-shaped reinforcing frame 7, the second butt-joint frame 8, and the first stringer 13 are co-cured and installed inside the second casing segment 2, and can be integrally manufactured with the second casing segment 2, so that the production is easy and the cost is low.
In addition, the second section of shell 2 adopts a carbon fiber composite material thin-wall structure with a bare shell structure, the whole shell is integrally manufactured, and the thickness of the skin is about 2.5 mm.
In an alternative embodiment of the present invention, as shown in fig. 2, 3 and 6, at least one L-shaped reinforcing frame is disposed inside the third casing 3. Optionally, the at least one L-shaped reinforcing frame includes: a fourth L-shaped reinforcing frame 9 and a fifth L-shaped reinforcing frame 10 arranged at an interval from the fourth L-shaped reinforcing frame 9.
In this embodiment, the fourth L-shaped reinforcing frame 9 and the fifth L-shaped reinforcing frame 10 are co-cured and installed inside the third section of the casing 3, so as to enhance the hoop rigidity and improve the overall fuel tank strength. And can be manufactured integrally with the third section of the shell 3, thus being easy to produce and low in cost.
In an alternative embodiment of the present invention, as shown in fig. 1, fig. 2 and fig. 3, a second lifting point 31 is disposed on the third casing 3 and between the fourth L-shaped reinforcing frame 9 and the fifth L-shaped reinforcing frame 10.
In this embodiment, the second hanging point 31 is disposed between the fourth L-shaped reinforcing frame 9 and the fifth L-shaped reinforcing frame 10, and the fourth L-shaped reinforcing frame 9 and the fifth L-shaped reinforcing frame 10 function to disperse the concentrated force received by the second hanging point 31.
In an alternative embodiment of the present invention, as shown in fig. 3, a second stringer 14 is longitudinally disposed in the third casing 3, and the second stringer 14 intersects with the fourth L-shaped reinforcing frame 9 and the fifth L-shaped reinforcing frame 10.
In this embodiment, the second stringer 14 is mounted inside the third section of the casing 3, further ensuring the rigidity of the tank casing.
In an optional embodiment of the present invention, as shown in fig. 3, at least one double T-shaped reinforcing frame is further disposed on the third casing 3. Optionally, the at least one double-T reinforcing frame includes: a first double T-shaped reinforcing frame 11 and a second double T-shaped reinforcing frame 12 spaced apart from the first double T-shaped reinforcing frame 11.
In this embodiment, the fourth L-shaped reinforcing frame 9, the fifth L-shaped reinforcing frame 10, the first double T-shaped reinforcing frame 11, the second double T-shaped reinforcing frame 12 and the second stringer 14 are co-cured and mounted at the rear part of the third section of the shell 3, and can be integrally manufactured with the third section of the shell 3, so that the manufacturing is easy, the cost is low, and the rigidity of the third section of the shell 3 is ensured.
In addition, the shell 3 in the third section is of a carbon fiber composite thin-wall structure with a bare shell structure, the whole shell is integrally manufactured, and the thickness of the skin can be about 2 mm.
The utility model discloses an in the above-mentioned embodiment, the thickness of the covering of second section casing 2 is greater than the thickness of the covering of first section casing 1 and third section casing 3, guarantees second section casing 2 when articulating with the aircraft, the steadiness of articulating.
In addition, the first L-shaped reinforcing frame 4, the second L-shaped reinforcing frame 6, the third L-shaped reinforcing frame 7, the fourth L-shaped reinforcing frame 9, and the fifth L-shaped reinforcing frame 10 according to the above embodiments of the present invention may be ring frames as shown in fig. 7.
The utility model discloses a fuel tank of above-mentioned embodiment adopts carbon-fibre composite thin-walled structure, has guaranteed the lightweight demand of fuel tank. And each section of shell is easy to integrally design and manufacture, high in integral rigidity, light in weight, simple in structure, short in production period, low in cost, easy to guarantee the sealing characteristic of the box body, strong in manufacturability, strong in adaptability to severe environments such as salt fog and the like.
In the above description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (14)
1. A fuel tank for a fixed-wing aircraft, comprising:
a first section of casing (1);
the second section of shell (2) is spliced with the first section of shell (1); and
a third section of shell (3) which is spliced with the second section of shell (2);
the first section of shell (1) is radially sealed and is connected with the second section of shell (2) in an inserting mode through a first butt joint frame (5), and the second section of shell (2) is radially sealed and is connected with the third section of shell (3) in an inserting mode through a second butt joint frame (8).
2. Fuel tank for fixed-wing aircraft according to claim 1, characterized in that the first section of shell (1) is connected hermetically radially to the second section of shell (2) by means of self-sealing bolts; the second section of shell (2) and the third section of shell (3) are in sealing connection through self-sealing bolts in the radial direction.
3. Fuel tank for fixed-wing aircraft according to claim 1, characterized in that the first section of casing (1) is provided with at least one first L-shaped stiffening frame (4) circumferentially inside.
4. Fuel tank for fixed-wing aircraft according to claim 1, characterized in that the second-section shell (2) is provided circumferentially with at least one second L-shaped stiffening frame (6) and at least one third L-shaped stiffening frame (7).
5. Fuel tank for fixed-wing aircraft according to claim 4, characterized in that the second section of shell (2) is provided internally and annularly with two second L-shaped stiffening frames (6) and two third L-shaped stiffening frames (7);
the two second L-shaped reinforcing frames (6) are arranged at intervals, the two third L-shaped reinforcing frames (7) are arranged at intervals, and the two third L-shaped reinforcing frames (7) are located between the two second L-shaped reinforcing frames (6).
6. Fuel tank for fixed-wing aircraft according to claim 5, characterized in that on the second section of shell (2) there is a first lifting point (21) between the two third L-shaped reinforcing frames (7).
7. Fuel tank for fixed-wing aircraft according to claim 6, characterized in that the second section of casing (2) has a thickened area at the location of the first lifting point (21).
8. Fuel tank for fixed-wing aircraft according to claim 7, characterized in that the second section of shell (2) is provided radially with a first stringer (13), the first stringer (13) passing through the thickened region.
9. Fuel tank for fixed-wing aircraft according to claim 1, characterized in that the third casing segment (3) is provided with at least one L-shaped stiffening frame in the circumferential direction.
10. The fuel tank for a fixed-wing aircraft according to claim 9, wherein the at least one L-shaped stiffening frame comprises: a fourth L-shaped reinforcing frame (9) and a fifth L-shaped reinforcing frame (10) which is arranged at intervals with the fourth L-shaped reinforcing frame (9).
11. Fuel tank for fixed-wing aircraft according to claim 10, characterized in that on the third section of shell (3) there is a second lifting point (31) between the fourth L-shaped stiffening frame (9) and the fifth L-shaped stiffening frame (10).
12. Fuel tank for fixed-wing aircraft according to claim 10, characterized in that inside said third section of shell (3) is longitudinally provided a second stringer (14), said second stringer (14) crossing said fourth L-shaped stiffening frame (9) and a fifth L-shaped stiffening frame (10).
13. Fuel tank for fixed-wing aircraft according to claim 1, characterized in that at least one double T-shaped stiffening frame is also provided on the third section of casing (3).
14. The fuel tank for a fixed-wing aircraft according to claim 13, wherein the at least one double-T stiffener frame comprises: the reinforcing frame comprises a first double-T-shaped reinforcing frame (11) and a second double-T-shaped reinforcing frame (12) which is arranged at intervals with the first double-T-shaped reinforcing frame (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020865121.3U CN213502933U (en) | 2020-05-21 | 2020-05-21 | Fuel tank for fixed-wing aircraft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020865121.3U CN213502933U (en) | 2020-05-21 | 2020-05-21 | Fuel tank for fixed-wing aircraft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213502933U true CN213502933U (en) | 2021-06-22 |
Family
ID=76379447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020865121.3U Active CN213502933U (en) | 2020-05-21 | 2020-05-21 | Fuel tank for fixed-wing aircraft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213502933U (en) |
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2020
- 2020-05-21 CN CN202020865121.3U patent/CN213502933U/en active Active
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