A sub-tank having a detachable suspension structure

Abstract

The application provides a sub-oil tank with a detachable suspension structure, comprising: a bearing beam having a first through hole; an outer beam located above the bearing beam, the outer beam having a second through hole located directly above the first through hole; an inner sleeve installed at the lower part of the first through hole; an outer sleeve installed at the upper part of the first through hole, the outer sleeve being threadedly connected with the inner sleeve; and an ear, one end of the ear penetrating through the second through hole, the other end of the ear being threadedly connected with the outer sleeve, and the other end of the ear being connected with a hanger of an airplane. The detachable suspension structure provided by the application guarantees the sealing property of the sub-oil tank, and the suspension structure is detachable, so that the sealing ring used for sealing can be replaced, thereby improving the maintainability and service life of the product.

Description

Technical Field

[0001] This application belongs to the field of aircraft fuel system technology, and in particular relates to an auxiliary fuel tank with a detachable suspension structure. Background Technology

[0002] Auxiliary fuel tanks are fuel storage containers mounted under the fuselage or wings of an aircraft. They can increase the aircraft's range and endurance. If necessary, auxiliary fuel tanks can be jettisoned to improve maneuverability for combat.

[0003] The auxiliary fuel tank is usually connected to the aircraft by a lifting lug. Since the lifting lug is connected to the auxiliary fuel tank by threads, it needs to be inserted deep into the auxiliary fuel tank. At the same time, the sealing of the installation position and the installation direction of the lifting lug must be ensured. Therefore, most lifting lugs are fixed in the installation direction and then fixed inside the auxiliary fuel tank with nuts. They cannot be disassembled from the outside afterward, which makes it impossible to replace the sealing ring at the installation position of the lifting lug, which is not conducive to the use and maintenance of the auxiliary fuel tank.

[0004] Therefore, there is an urgent need for a detachable suspension structure to solve the above problems. Utility Model Content

[0005] The purpose of this application is to provide a detachable suspension structure for aircraft auxiliary fuel tanks to solve the maintainability problems caused by the non-removable auxiliary fuel tank lugs.

[0006] This application provides an auxiliary fuel tank with a detachable suspension structure, comprising: The load-bearing beam has a first through hole; An outer beam is located above the load-bearing beam, and the outer beam has a second through hole, which is located directly above the first through hole; The inner liner is installed at the lower part of the first through hole; An outer bushing is installed on the upper part of the first through hole, and the outer bushing is threadedly connected to the inner bushing; The lifting lug has one end passing through the second through hole and the other end being threadedly connected to the outer bushing. The other end of the lifting lug is connected to the aircraft's pylon.

[0007] Preferably, it further includes: The locking nut can lock the lifting lug and ensure that the installation direction of the lifting lug is parallel to the axis of the auxiliary oil tank.

[0008] Preferably, the first through hole is a stepped hole, the inner bushing is installed at the lower part of the stepped hole, and the outer bushing is installed at the upper part of the stepped hole.

[0009] Preferably, the inner liner is installed at the lower part of the stepped hole by screws.

[0010] Preferably, the inner bushing has a first internal thread, and the outer bushing has a second internal thread and a first external thread.

[0011] Preferably, the first internal thread matches the first external thread.

[0012] Preferably, the lug has a second external thread.

[0013] Preferably, the second external thread matches the second internal thread.

[0014] The beneficial technical effects of this application are as follows: The detachable suspension structure provided in this application ensures the sealing of the auxiliary fuel tank. At the same time, the detachable suspension structure allows the sealing rings used for sealing to be replaced, improving product maintainability and service life. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the auxiliary fuel tank suspension structure; Explanation of reference numerals in the attached drawings: 1-Fairing, 2-Outer beam, 3-Locking nut, 4-Lifting lug, 5-Sealing ring, 6-Outer bushing, 7-Auxiliary fuel tank skin, 8-Bearing beam, 9-Inner bushing, 10-Screw. Detailed Implementation To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0017] The features and illustrative embodiments of various aspects of this application will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a comprehensive understanding of this application. However, it will be apparent to those skilled in the art that this application can be implemented without some of these specific details. The description of the embodiments below is merely intended to provide a better understanding of this application by illustrating examples. This application is by no means limited to any specific setups and methods set forth below, but covers any improvements, substitutions, and modifications to the structures, methods, and devices without departing from the spirit of this application. Well-known structures and techniques are not shown in the accompanying drawings and the following description to avoid unnecessarily obscuring this application.

[0018] In the description of this application, it should be noted that the directions or positional relationships indicated by terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and should not be construed as limiting this application. In addition, the use of ordinal numbers (e.g., "first and second," etc.) is for distinguishing objects and is not limited to this order, and should not be construed as indicating or implying relative importance.

[0019] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly, encompassing both direct connection and indirect connection via an intermediate medium. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other, and the various embodiments can be referenced and cited in turn. The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] The present application will be described in further detail below with reference to the embodiments and accompanying drawings, but the implementation of the present application is not limited thereto.

[0022] This application proposes a detachable auxiliary fuel tank suspension structure, which includes a fairing 1, an outer beam 2, a locking nut 3, a lifting lug 4, a sealing ring 5, an outer bushing 6, an auxiliary fuel tank skin 7, a load-bearing beam 8, an inner bushing 9, and screws 10. The load-bearing beam 8 has a step in its through hole, and a screw hole is provided on the bottom end face of the through hole. The inner bushing 9 is connected to the load-bearing beam 8 by the screws 10. The inner thread of the inner bushing 9 is connected to the outer thread of the outer bushing 6. The outer bushing 6 has a step, and the step has a sealing groove. The sealing ring 5 fits into the auxiliary fuel tank skin 7 to achieve a reliable seal. The outer beam 2 has a through hole for the lifting lug 4 to pass through. The bottom of the lifting lug 4 has an external thread that connects to the internal thread of the outer bushing 6, and the upper part of the lifting lug 4 has an external thread that connects to the internal thread of the locking nut 3. After the lifting lug 4 is adjusted to the correct position, the locking nut 3 is used to fix the installation direction. The fairing 1 is used to ensure the aerodynamic shape of the auxiliary fuel tank.

[0023] Furthermore, the outer bushing 6 is a blind hole; Furthermore, screw 10 is equipped with a safety hole for mutual locking; Furthermore, locking nuts 3 and outer beams 2 should have safety holes to ensure mutual safety.

[0024] The detachable suspension structure ensures the sealing of the auxiliary fuel tank, and the detachable suspension structure also allows for the replacement of the sealing rings used for sealing, improving product maintainability and service life.

[0025] This application will now be described in further detail; see [link to relevant documentation]. Figure 1 A detachable auxiliary fuel tank suspension structure, the structure comprising a fairing 1, an outer beam 2, a locking nut 3, a lifting lug 4, a sealing ring 5, an outer bushing 6, an auxiliary fuel tank skin 7, a load-bearing beam 8, an inner bushing 9, and screws 10.

[0026] The inner bushing 9 is fixed to the load-bearing beam 8 by screws 10, and the screws are locked together for safety. The inner bushing 9 has an internal thread of M33×2. The outer bushing 6 is 75mm long, has an external thread of M33×2, and an internal thread of M24×1.5. The sealing ring 5 is placed in the sealing groove, and the outer bushing 6 is tightened so that the sealing ring 4 is in contact with the auxiliary oil tank skin 7 and is compressed. At this time, the sealing ring 4 and the outer surface of the auxiliary oil tank skin 7 form a reliable seal.

[0027] The lifting lug 4 passes through the outer beam 2. The bottom of the lifting lug 4 is provided with an external thread M24×1.5 and the top is provided with an external thread M68×1.5. After tightening the lifting lug 4, adjust the installation direction of the lifting lug and fix it with the locking nut 3. The locking nut 3 is provided with an internal thread M68×1.5 and a thickness of 10mm.

[0028] This application provides an auxiliary fuel tank with a detachable suspension structure, comprising: a load-bearing beam having a first through hole; an outer beam located above the load-bearing beam, the outer beam having a second through hole located directly above the first through hole; an inner bushing installed at the lower part of the first through hole; an outer bushing installed at the upper part of the first through hole, the outer bushing being threadedly connected to the inner bushing; and a lifting lug, one end of which passes through the second through hole and is threadedly connected to the outer bushing, the other end of which is connected to an aircraft pylon. The detachable suspension structure provided by this application ensures the sealing performance of the auxiliary fuel tank, and the detachable suspension structure allows for the replacement of the sealing rings used for sealing, improving product maintainability and service life.

[0029] The above detailed embodiments are a detailed description of this application. It should not be considered that the specific embodiments of this application are limited to these descriptions. For those skilled in the art, several simple deductions and substitutions can be made without departing from the concept of this application, and all of these should be considered to fall within the protection scope of this application.

Claims

1. An auxiliary fuel tank with a detachable suspension structure, characterized in that, include: The load-bearing beam has a first through hole; An outer beam is located above the load-bearing beam, and the outer beam has a second through hole, which is located directly above the first through hole; The inner liner is installed at the lower part of the first through hole; An outer bushing is installed on the upper part of the first through hole, and the outer bushing is threadedly connected to the inner bushing; The lifting lug has one end passing through the second through hole and the other end being threadedly connected to the outer bushing. The other end of the lifting lug is connected to the aircraft's pylon.

2. The auxiliary fuel tank with a detachable suspension structure according to claim 1, characterized in that, Also includes: The locking nut can lock the lifting lug and ensure that the installation direction of the lifting lug is parallel to the axis of the auxiliary oil tank.

3. The auxiliary fuel tank with a detachable suspension structure according to claim 1, characterized in that, The first through hole is a stepped hole, and the inner bushing is installed at the lower part of the stepped hole; the outer bushing is installed at the upper part of the stepped hole.

4. The auxiliary fuel tank with a detachable suspension structure according to claim 3, characterized in that, The inner bushing is installed at the lower part of the stepped hole by screws.

5. The auxiliary fuel tank with a detachable suspension structure according to claim 4, characterized in that, The inner bushing has a first internal thread, and the outer bushing has a second internal thread and a first external thread.

6. The auxiliary fuel tank with a detachable suspension structure according to claim 5, characterized in that, The first internal thread matches the first external thread.

7. The auxiliary fuel tank with a detachable suspension structure according to claim 6, characterized in that, The lug has a second external thread.

8. The auxiliary fuel tank with a detachable suspension structure according to claim 7, characterized in that, The second external thread matches the second internal thread.

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