CN214690259U - Simulated oil tank box section structure for lightning test of aircraft fuel system pipeline - Google Patents
Simulated oil tank box section structure for lightning test of aircraft fuel system pipeline Download PDFInfo
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- CN214690259U CN214690259U CN202120401918.2U CN202120401918U CN214690259U CN 214690259 U CN214690259 U CN 214690259U CN 202120401918 U CN202120401918 U CN 202120401918U CN 214690259 U CN214690259 U CN 214690259U
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Abstract
The utility model provides a simulation oil tank box section structure for aircraft fuel oil system pipeline lightning test relates to lightning protection technical field. The specific technical scheme is as follows: the simulated oil tank section structure comprises an upper wall plate, a lower wall plate and a fuel system pipeline, wherein the upper wall plate and the lower wall plate are arranged in an up-down opposite mode, and the fuel system pipeline is arranged between the upper wall plate and the lower wall plate; a front beam and a rear beam are arranged between the upper wall plate and the lower wall plate, and the front beam and the rear beam are arranged oppositely; a plurality of rib plates are arranged between the front beam and the rear beam; an access opening cover is arranged on the lower wall plate; and the upper wall plate is provided with a stringer. A simulation oil tank box section structure for aircraft fuel system pipeline thunder and lightning is experimental in this disclosure can process through mechanical system, its lower wallboard with overhaul flap structure unchangeable, electric overlap joint characteristic, sealing performance etc. can satisfy the experimental requirement of aircraft fuel system pipeline thunder and lightning to reduce the processing cost of test piece by a wide margin.
Description
Technical Field
The utility model relates to a lightning protection technical field especially relates to a simulation oil tank box section structure for aircraft fuel system pipeline lightning test.
Background
The ignition and explosion of aircraft fuel tanks seriously threaten aviation safety, and lightning is one of the most critical items. When an aircraft is struck by lightning, transient large current acts on an aircraft structure, the aircraft structure and parts can be melted, ablated, deformed and the like, electric arcs or electric sparks can occur inside a fuel tank, fuel steam is ignited, and the fuel tank is exploded. At home and abroad, aircraft airworthiness clauses and test standards (such as SAE ARP5416A, GJB3567 and the like) require that a fuel oil system passes a lightning test to show that an ignition source cannot appear in an oil tank when the fuel oil system is struck by lightning.
The fuel system pipeline is the key point of the lightning protection design and the test verification of the fuel system, and ignition sources can be generated due to the conduction of lightning current under the conditions of normal and failure modes of flexible joints, overlapping wires and the like installed on the fuel system pipeline. The lightning protection test of the fuel system pipeline is verified, a fuel tank box section test piece needs to be designed and manufactured, the fuel pipeline and related accessories are fixedly installed in the fuel tank box section, and the lightning protection design effectiveness of the fuel system pipeline is verified and evaluated through a lightning current pipeline measurement test and an ignition source detection test.
The traditional lightning test of the fuel pipeline generally adopts a real fuel tank structure box section as a mounting carrier of a fuel system pipeline, the price of a structural material is high, the manufacturing process of parts is complex, the assembly flow is complex, a plurality of procedures are related to structural strength, mechanical property and the like, and for the lightning test, the factors related to structural electrical property are mainly examined. For the lightning test of the fuel system pipeline, the ignition source of the fuel pipeline is mainly investigated, and the influence of the structure of the fuel tank is not required to be examined. Considering the processing difficulty and cost of the fuel tank box section, a simple fuel tank box section can be designed to simulate a real box section, and how to design the fuel tank box section which has the similar electrical lap joint performance and the similar lightning current distribution with the aircraft fuel system box section and can meet the requirements of lightning tests becomes a design difficulty.
SUMMERY OF THE UTILITY MODEL
The embodiment of the disclosure provides a simulation oil tank box section structure for a lightning test of an aircraft fuel system pipeline, which can effectively perform the lightning test of the aircraft fuel system pipeline. The technical scheme is as follows:
according to a first aspect of the embodiments of the present disclosure, a simulated fuel tank section structure for a lightning test of an aircraft fuel system pipeline is provided, the simulated fuel tank section structure includes an upper wall plate, a lower wall plate and a fuel pipeline system, wherein the upper wall plate and the lower wall plate are arranged oppositely, and the fuel pipeline system is arranged between the upper wall plate and the lower wall plate;
a front beam and a rear beam are arranged between the upper wall plate and the lower wall plate, and the front beam and the rear beam are arranged oppositely;
a plurality of rib plates are arranged between the front beam and the rear beam;
an access cover is arranged on the upper cover plate;
and the upper wall plate is provided with a stringer.
A simulation oil tank box section structure for aircraft fuel system pipeline lightning test in this embodiment can process through mechanical system, and its upper cover plate and maintenance flap are unchangeable, but sealing performance improves greatly, can carry out aircraft fuel system pipeline lightning test effectively.
In one embodiment, a bracket is arranged on the rib plate or the stringer, and the fuel pipe is fixed on the bracket.
In this embodiment, a bracket is provided on the upper panel stringer or the rib plate, and the fuel pipe is fixed to the bracket.
In one embodiment, the bracket is provided with a plurality of clips, and the fuel pipe is fixed on the bracket through the clips.
In this embodiment, the fuel pipe is fixed by providing the clamp on the bracket so as to facilitate the installation and removal of the fuel pipe, while preventing damage to the fuel pipe when installing, testing and removing the fuel pipe.
In one embodiment, a first rib plate, a second rib plate and a third rib plate are arranged between the front beam and the rear beam, and the first rib plate, the second rib plate and the third rib plate are arranged at intervals;
in this embodiment, the first rib plate and the second rib plate are both provided with a first through hole, and the lower cover plate is provided with a second through hole;
after the fuel pipe sequentially passes through the first through holes in the first rib plate and the second rib plate, the fuel pipe extends out of the simulated fuel tank box section structure through the second through holes.
In this embodiment, the first through holes are formed in the first rib plate and the second rib plate, and the fuel pipe penetrates through the first through holes, so that the fuel pipe is further positioned through the first rib plate and the second rib plate, and the fuel pipe can be further prevented from shaking in the test process.
In one embodiment, the surfaces of the front beam and the rear beam, which are in contact with the lower wall plate, and the surfaces of the front beam and the rear beam, which are in contact with the upper wall plate, are provided with first sealant layers;
and a second sealant layer is arranged on one surface of the rib plate, which is in contact with the lower wall plate, one surface of the rib plate, which is in contact with the upper wall plate, one surface of the rib plate, which is in contact with the front beam, and one surface of the rib plate, which is in contact with the rear beam.
In the embodiment, the first sealant layers are arranged on the surface of the first side plate, which is in contact with the lower wall plate, the surface of the first side plate, which is in contact with the upper wall plate, the surface of the second side plate, which is in contact with the lower wall plate, and the surface of the second side plate, which is in contact with the upper wall plate; simultaneously, a second sealing adhesive layer is arranged on one face of the rib plate, which is in contact with the lower wall plate, on one face of the rib plate, which is in contact with the upper wall plate, on one face of the rib plate, which is in contact with the front beam, and on one face of the rib plate, which is in contact with the rear beam, so that the sealing performance of the oil tank section structure is further improved.
In one embodiment, the front beam and the rear beam are fixed on the lower wall plate and the upper wall plate through self-locking screws;
two ends of the rib plate are respectively fixed on the front beam and the rear beam through self-locking screws.
In this embodiment, through setting up self-locking screw with front beam and back beam be fixed in down on wallboard and the last wallboard, be convenient for installation and dismantlement.
In one embodiment, the bracket is fixed to the upper panel by a self-locking screw.
In this embodiment, through setting up self-locking screw with the support be fixed in on the wallboard, the dismantlement and the installation of the support of being convenient for.
In one embodiment, the clip is secured to the bracket by a self-locking screw.
In this embodiment, be fixed in the clamp through setting up self-locking screw on the support, the dismantlement and the installation of the clamp of being convenient for.
In one embodiment, the upper wall plate, the lower wall plate, the front beam, the rear beam and the rib plate are all made of aluminum alloy platinum.
In one embodiment, the surfaces of the upper wall plate, the lower wall plate, the front beam, the rear beam and the rib plate are subjected to conductive oxidation treatment, and then paint spraying layers are arranged.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
FIG. 1 is a schematic structural diagram of a simulated fuel tank section structure for a lightning test of an aircraft fuel system pipeline according to the present disclosure;
FIG. 2 is a partial schematic structural view of a simulated fuel tank section structure for a lightning test of an aircraft fuel system pipeline according to the present disclosure.
In the figure, 1-lower wall plate, 2-upper wall plate, 3-fuel pipe, 4-front beam, 5-rear beam, 6-bracket, 7-clamp, 8-first rib plate, 9-second rib plate and 10-third rib plate.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of devices and systems consistent with certain aspects of the present disclosure, as detailed in the appended claims.
According to a first aspect of the embodiments of the present disclosure, as shown in fig. 1-2, there is provided a simulated fuel tank section structure for a lightning test of an aircraft fuel system pipeline, the simulated fuel tank section structure comprising a lower wall plate 1, an upper wall plate 2, and a fuel pipeline system arranged between the lower wall plate 1 and the upper wall plate 2;
a front beam 4 and a rear beam 5 are arranged between the lower wall plate 1 and the upper wall plate 2, and the front beam 4 and the rear beam 5 are oppositely arranged;
a plurality of rib plates are arranged between the front beam 4 and the rear beam 5;
an access cover 11 is arranged on the lower wall plate 1;
the upper wall plate 2 is provided with a stringer.
A simulation oil tank box section structure for aircraft fuel system pipeline lightning test in this embodiment can process through mechanical system, and wallboard 1 and maintenance flap 11 are unchangeable under it, but sealing performance improves greatly, can carry out aircraft fuel system pipeline lightning effectively and test.
In one embodiment, a bracket 6 is arranged on the rib plate or the stringer, and the fuel pipe 3 is fixed on the bracket 6.
In this embodiment, a bracket is provided on the upper panel stringer or the rib plate, and the fuel pipe is fixed to the bracket.
In one embodiment, the bracket 6 is provided with a plurality of clips 7, and the fuel pipe 3 is fixed to the bracket 6 through the clips 7.
In the present embodiment, the fuel pipe 3 is fixed to the bracket 6 by providing the clip 7 on the bracket 6 to facilitate the mounting and dismounting of the fuel pipe 3 while preventing damage to the fuel pipe 3 when the fuel pipe 3 is mounted, tested, and dismounted.
In one embodiment, a first rib plate 8, a second rib plate 9 and a third rib plate 10 are arranged between the front beam 4 and the rear beam 5, and the first rib plate 8, the second rib plate 9 and the third rib plate 10 are arranged at intervals;
the first rib plate 8 and the second rib plate 9 are both provided with first through holes, and the upper wall plate 2 is provided with second through holes;
after sequentially passing through the first through holes in the first rib plate 8 and the second rib plate 9, the fuel pipe 3 extends out of the simulated fuel tank section structure through the second through hole.
In this embodiment, the first through holes are formed in the first rib 8 and the second rib 9, and the fuel pipe 3 passes through the first through holes, so that the fuel pipe 3 is further positioned by the first rib 8 and the second rib 9, and the fuel pipe 3 can be further prevented from shaking in the test process.
It should be noted that, the present disclosure is only described by taking the case where the first through holes are provided in the first rib 8 and the second rib 9 as an example, and actually, the present disclosure may provide the first through holes in the first rib 8, the second rib 9, and the third rib 10, and the present disclosure does not limit the arrangement positions and the arrangement number of the first through holes.
In one embodiment, the surfaces of the front beam 4 and the rear beam 5 contacting the lower wall plate 1 and the surfaces of the front beam 4 and the rear beam 5 contacting the upper wall plate 2 are provided with a first sealant layer;
and a second sealant layer is arranged on one surface of the rib plate, which is in contact with the lower wall plate 1, one surface of the rib plate, which is in contact with the upper wall plate 2, one surface of the rib plate, which is in contact with the front beam 4, and one surface of the rib plate, which is in contact with the rear beam 5.
In the embodiment, the first sealant layers are arranged on the surface of the front beam 4 contacting the lower wall plate 1, the surface of the front beam 4 contacting the upper wall plate 2, the surface of the rear beam 5 contacting the lower wall plate 1 and the surface of the rear beam 5 contacting the upper wall plate 2; simultaneously, a second sealing adhesive layer is arranged on one surface of the rib plate, which is in contact with the lower wall plate 1, on one surface of the rib plate, which is in contact with the upper wall plate 2, on one surface of the rib plate, which is in contact with the front beam 4, and on one surface of the rib plate, which is in contact with the rear beam 5, so that the sealing performance of the oil tank section structure is further improved.
In one embodiment, the front beam 4 and the rear beam 5 are fixed on the lower wall plate 1 and the upper wall plate 2 through self-locking screws;
two ends of the rib plate are respectively fixed on the front beam 4 and the rear beam 5 through self-locking screws.
In the embodiment, the front beam 4 and the rear beam 5 are fixed on the lower wall plate 1 and the upper wall plate 2 by arranging the self-locking screws, so that the installation and the disassembly are convenient.
In one embodiment, the bracket 6 is fixed to the upper panel 2 by self-locking screws.
In this embodiment, the bracket 6 is fixed on the upper wall plate 2 by arranging the self-locking screw, so that the bracket 6 can be conveniently detached and installed.
In one embodiment, the clip 7 is secured to the bracket 6 by a self-locking screw.
In this embodiment, the clamp 7 is fixed on the bracket 6 by arranging the self-locking screw, so that the clamp 7 can be conveniently detached and installed.
In one embodiment, the lower wall plate 1, the upper wall plate 2, the front beam 4, the rear beam 5 and the rib plates are made of aluminum alloy platinum.
In one embodiment, the surfaces of the lower wall plate 1, the upper wall plate 2, the front beam 4, the rear beam 5 and the rib plate are subjected to conductive oxidation treatment, and then paint spraying layers are arranged.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (10)
1. A simulation oil tank box section structure for a lightning test of an aircraft fuel system pipeline is characterized by comprising an upper wall plate, a lower wall plate and a fuel system pipeline, wherein the upper wall plate and the lower wall plate are oppositely arranged, and the fuel system pipeline is arranged between the upper wall plate and the lower wall plate;
a front beam and a rear beam are arranged between the upper wall plate and the lower wall plate, and the front beam and the rear beam are arranged oppositely;
a plurality of rib plates are arranged between the front beam and the rear beam;
an access opening cover is arranged on the lower wall plate;
and the upper wall plate is provided with a stringer.
2. A simulated fuel tank segment structure as claimed in claim 1, wherein a bracket is provided on said rib or stringer, and a fuel pipe is secured to said bracket.
3. A simulated fuel tank segment structure as claimed in claim 2, wherein said bracket is provided with clips by which fuel pipes are secured to said bracket.
4. A simulated fuel tank segment structure as claimed in any one of claims 1 to 3, wherein a first rib, a second rib and a third rib are provided between the front beam and the rear beam, the first rib, the second rib and the third rib being provided at a distance from each other.
5. A simulated fuel tank segment structure as claimed in any one of claims 1 to 3, wherein the face of said front and rear beams in contact with said lower wall panel and the face of said front and rear beams in contact with said upper wall panel are each provided with a first layer of sealant;
and a second sealant layer is arranged on one surface of the rib plate, which is in contact with the lower wall plate, one surface of the rib plate, which is in contact with the upper wall plate, one surface of the rib plate, which is in contact with the front beam, and one surface of the rib plate, which is in contact with the rear beam.
6. The simulated fuel tank box section structure of claim 1, wherein said front and rear beams are each secured to said upper and lower wall panels by self-locking screws;
two ends of the rib plate are respectively fixed on the upper wall plate and the lower wall plate through self-locking screws.
7. A simulated fuel tank segment structure as claimed in claim 2, wherein said bracket is secured to said rib or upper wall stringer by self-locking screws.
8. A simulated fuel tank segment structure as claimed in claim 3 wherein said clip is secured to said bracket by self-locking screws.
9. A simulated fuel tank box section structure as claimed in any one of claims 1 to 3, wherein said upper wall panel, lower wall panel, front beam, rear beam and rib panel are made of an aluminium alloy material.
10. A simulated fuel tank box section structure as claimed in any one of claims 1 to 3, wherein the surfaces of said upper wall panel, lower wall panel, front beam, rear beam and rib panel are subjected to conductive oxidation treatment, and then painted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120401918.2U CN214690259U (en) | 2021-02-23 | 2021-02-23 | Simulated oil tank box section structure for lightning test of aircraft fuel system pipeline |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120401918.2U CN214690259U (en) | 2021-02-23 | 2021-02-23 | Simulated oil tank box section structure for lightning test of aircraft fuel system pipeline |
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| CN214690259U true CN214690259U (en) | 2021-11-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114229030A (en) * | 2022-02-26 | 2022-03-25 | 合肥航太电物理技术有限公司 | Protection design method for eliminating ignition source of lightning B area of oil tank |
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2021
- 2021-02-23 CN CN202120401918.2U patent/CN214690259U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114229030A (en) * | 2022-02-26 | 2022-03-25 | 合肥航太电物理技术有限公司 | Protection design method for eliminating ignition source of lightning B area of oil tank |
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