KR101681558B1 - Radome coupling member for lihgtning and assembly thereof - Google Patents

Radome coupling member for lihgtning and assembly thereof Download PDF

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Publication number
KR101681558B1
KR101681558B1 KR1020150156673A KR20150156673A KR101681558B1 KR 101681558 B1 KR101681558 B1 KR 101681558B1 KR 1020150156673 A KR1020150156673 A KR 1020150156673A KR 20150156673 A KR20150156673 A KR 20150156673A KR 101681558 B1 KR101681558 B1 KR 101681558B1
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KR
South Korea
Prior art keywords
radome
coupling
hole
fastening
assembly
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KR1020150156673A
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Korean (ko)
Inventor
이원준
조창민
주영식
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국방과학연구소
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Priority to KR1020150156673A priority Critical patent/KR101681558B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D45/00—Aircraft indicators or protectors not otherwise provided for
    • B64D45/02—Lightning protectors; Static dischargers

Abstract

The present invention relates to a radome coupling member having a lightning transfer function and a radome assembly having the same. The radome coupling member having a lightning transfer function, according to an embodiment of the present invention, comprises: an exposure part (110) which is exposed to the inner and outer surfaces of coupling parts (211) of a radome (210); and an insertion part (120) which is formed to protrude from the side surface of the exposure part (110) in parallel with the coupling parts (211) and is inserted and fixed between the coupling parts (211). Therefore, the present invention can have an effective load transferring and coupling structure and an electrical and mechanical coupling structure for applying a stable electric contact.

Description

TECHNICAL FIELD [0001] The present invention relates to a radome coupling member and a radome assembly including the radome coupling member,

The present invention relates to a radome fastening member and a radome assembly including the same, and more particularly, to a radome fastening member for an electrical / mechanical fastening structure capable of forming a stable electrical contact and a radome assembly including the same.

Since Benjamin Franklin revealed that lightning strikes are caused by electric phenomena, high electric energy such as lightning is recognized as a risk factor for flying airplanes. Thunderstorms directly cause the breakdown of structures and melting of metal members, because electrical energy under high voltage is instantaneously concentrated, indirectly leading to loss of electrical equipment and equipment due to high voltage leakage. In the past, there was damage and fire caused by insulation breakdown in wooden aircraft. All metal body aircraft was developed by the diffusion of aluminum, but lightning accident such as fire trouble of fuel tank continued. Thunderstorms are concentrated at an altitude of 2 km to 4.5 km, which is the altitude of the main carrier, and it is generally reported that the lightning strike is carried out once every 3,000 flying hours or once a year. Thunderstorms can be applied to various parts of the aircraft and various types of accidents caused by lightning can be easily found. In particular, flammable sites such as fuel systems are directly vulnerable to lightning, and gas loss cases due to loss of control system due to direct or indirect lightning influence are also reported.

In order to protect structures such as airplanes from lightning that can cause serious damage to the gas structure and system, firstly, the lightning current flowing from the outside flows to the path with less loss (eg, the surface of the gas) And secondly, there is a method in which a component that is likely to cause a loss is shielded from intrusion of a lightning electromagnetic field through a design which reduces the possibility of a pupil or a contact, or a direct shielding structure is applied.

If a lightning strike is applied to a general metallic structure, it may cause local melting or deformation on the surface of the metal body, but the probability of structural damage to the lightning is relatively low due to the characteristic of the metal material which can easily flow current. On the other hand, in the case of a composite material having a low electrical conductivity, current flow is not smooth when a lightning stroke is applied, so that charge is concentrated and direct structure damage occurs (see FIG. 1). In particular, a dielectric structure having electrical insulation such as a glass fiber composite has a high probability of structural damage due to lightning, so that a conductive path made of a highly conductive material is provided so that a lightning charge can be easily induced and flowed artificially do.

In this composite structure, a conductive wire (mesh wire) is generally attached to the surface to smooth the flow of electric charge, and an artificial conductive path is designed using a diverter strip made of a high-conductive metal wire .

Various lightning protection measures as described above can be applied to the surface of a general gas, but the application of a metal material may be restricted to a part where an electromagnetic function is to be performed. For example, radome is made of quartz, fiberglass or aramid fiber which is generally low-loss non-conductor material because it has to transmit and receive electromagnetic signals. Electrically conductive materials are advantageous for lightning, but electromagnetic wave signals can not be transmitted. Low-loss nonconductive materials are advantageous for electromagnetic wave transmission, but they are vulnerable to lightning because there is no conductive material / conductive path. Therefore, in order to compensate for this, generally, a stripline strip is designed and applied in a range that does not interfere with electromagnetic wave transmission as shown in FIG.

When a thunderstorm is applied to the radome, electrical energy is transferred to the body along the thunderstroke disperser. In the case of a high performance composite material, which is widely used in recent years, the electrical conductivity is lower than that of a metal. Therefore, a highly conductive layer such as a metal mesh (ex: copper mesh) Thereby facilitating the electrical flow of the surface. In this case, it is essential that a design method that minimizes the electrical resistance at the joint between the radome equipped with the thunderstroke disperser and the body structure with the metallic mesh attached to the surface is required.

In the conventional design method as shown in Fig. 3, a method of energizing via a metal fastening structure (ex. Bolt / nut) is mainly used. A ground wire is added to the fastening structure (nut) Respectively. However, this method is always sensitive to the contact resistance due to the nature of the detachable fastening structure. That is, when the contact resistance is increased due to the change of the wear of the fastening structure and the insertion of the foreign material during operation, there is a problem that the power supply performance is directly affected.

Published Japanese Patent Application No. 2000-0060625 (Oct. 16, 2000)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a radome coupling member of a lightning-storming function capable of providing a lightweight design and a fastening structure capable of securing stable electrical contacts, and a radome assembly .

The radome coupling member of the lightning-storming transmission function according to an embodiment of the present invention includes an exposed portion 110 exposed to an inner circumferential surface and an outer circumferential surface of a coupling portion 211 of a radome 210; And an insertion part 120 protruding from the side surface of the exposed part 110 in parallel with the coupling part 211 and inserted and fixed between the coupling parts 211.

The exposed portion 110 includes a plurality of fastening holes 111.

The fastening hole 111 is formed to be inclined so that the outer diameter is larger than the inner diameter.

The fastening hole 111 is formed on the side of the body of the airplane, and is a fastening hole 112 for fastening the body to the radome.

The fastening hole 111 is formed on the upper part of the fastening hole 112 for fastening the body, and has a fastening hole 113 for a thunder-breaking disperser for fastening the lightning scattering device to the radome fastening member.

The thickness of the exposed portion 110 is greater than the thickness of the coupling portion 211 and the thickness of the insertion portion 120 is less than the thickness of the coupling portion 211.

The radome assembly according to another embodiment of the present invention includes a radome 210 in which the radome coupling member 100 is inserted into the coupling portion 211; A thunderstorm disperser 220 attached to an outer circumferential surface of the radome 210 and having a through hole 221 at one end thereof; And the radial coupling device 100 and the thunder-breaking dispersing device 220 so that the radial coupling device 100 and the lightning pulverizer 220 are in surface contact with each other through the coupling hole 113 and the through- A bolt 230 for a thunder-storm disperser for fastening the hoist 220, and a nut 240 for a thunder-storm disperser.

The through hole 221 is formed so as to be inclined so that the outside diameter is larger than the inside diameter.

The air vehicle according to another embodiment of the present invention includes the radome assembly 200; A body 310 of the air vehicle body to which the radome assembly 200 is fastened; A highly conductive layer (320) attached to an outer circumferential surface of the body (310) of the air vehicle; And the radome assembly 200 which passes through the fastening coupling hole 112 and fastens the body 310 and the radome assembly 200 so that the radome fastening member 100 and the high- And includes a fastening bolt 330 and a body fastening nut 340.

As described above, according to the present invention, it is possible to apply an electrical / mechanical fastening structure capable of forming an effective load transferring structure and forming a stable electrical contact.

In addition, stabilization design for lightning stroke and light weight design of gas structure are possible.

1 is a photograph showing a state in which a front end radome without a lightning rod is broken by a lightning strike.
2 is a photograph of a lightning rod disperser of an aircraft radome.
3 is a cross-sectional view of a fastening portion of a radome and a fuselage according to the prior art.
4 is a perspective view of a radome fastening member of a lightning-storming transmission function according to an embodiment of the present invention.
5 is a perspective view of a radome assembly including a radome coupling member of a lightning-storming transmission function according to another embodiment of the present invention.
FIG. 6 is a cross-sectional view of a radome assembly including a radome fastening member of a lightning storm conveying function according to another embodiment of the present invention. FIG.
7 is a partial enlarged view of a vehicle including a radome assembly according to another embodiment of the present invention;

It is to be understood that the words or words used in the present specification and claims are not to be construed in a conventional or dictionary sense and that the inventor can properly define the concept of a term to describe its invention in the best way And should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and are not intended to represent all of the technical ideas of the present invention. Therefore, various equivalents It should be understood that water and variations may be present. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

4 is a perspective view of a radome fastening member of a lightning-storming transmission function according to an embodiment of the present invention. Referring to FIG. 4, the radome fastening member of the lightning-storming transmission function according to an embodiment of the present invention includes an exposed portion 110 and an inserting portion 120.

The exposed portion 110 is exposed to the inner peripheral surface and the outer peripheral surface of the coupling portion 211 of the radome 210.

The insertion portion 120 is formed to protrude from the side surface of the exposed portion 110 in parallel with the coupling portion 211 and is inserted and fixed between the coupling portions 211. The thickness of the exposed portion 110 may be greater than the thickness of the coupling portion 211 and the thickness of the insertion portion 120 may be less than the thickness of the coupling portion 211. That is, a radome fastening member 100 having a thickness of two layers is manufactured, and the radome fastening member 100 is partially inserted / partially exposed to the fastening portion 211, which is a flange area of the radome. The radome coupling member 100 may be made of a metal having excellent electrical conductivity. And includes a fastening hole for fastening the diverter strip 220 and a fastening hole for fixing the radome 210 to the moving body 310, as described later.

The exposed portion 110 includes a plurality of fastening holes 111. The fastening hole 111 is formed to be inclined so that the outer diameter is larger than the inner diameter. Also, the fastening hole 111 is formed on the body side of the flying body and has a fastening hole 112 for fastening the body to the radome. And a coupling hole 113 for a thunder-breaking disperser, which is formed on an upper portion of the coupling member for coupling body 112, and which is used to connect the thunder-breaking disperser and the radome coupling member. That is, the collision hole for the thunderstorm disperser 113 is a portion where one end of a thunderstorm disperser 220 is fastened, and a fastening coupling hole 112 for fastening the radome 210 and the moving body 310 . That is, the electric energy applied through the striker 220 is transmitted to the radome coupling member 100 and then transmitted to the body (or the high-conductivity layer) which is in surface contact with the exposed portion 110 of the radome coupling member 100 ).

The insertion portion 120 of the radome fastening member 100 may be inserted between the layers of the composite radome stack to transfer the structural load applied from the radome to the body. The exposed portion 110 of the radome fastening member 100 is exposed to the surface of the radome and is in direct contact with the bolts 230 and 330 at the time of bolting, So that the electrical contact having a low electrical resistance can be effectively realized without using the bolts and nuts 230, 240, 330, and 340 as a whole, because of the surface contact with the high conductive layer 320 (ex: metal mesh)

FIG. 5 is a perspective view of a radome assembly including a radome coupling member according to another embodiment of the present invention, FIG. 6 is a perspective view of a radome assembly according to another embodiment of the present invention, Sectional view of the radome assembly. 5 and 6, the radome assembly including the radome coupling member of the lightning-storming transmission function according to another embodiment of the present invention is characterized in that the radome coupling member 100 is mounted on the radome (210); A thunderstorm disperser 220 attached to an outer circumferential surface of the radome 210 and having a through hole 221 at one end thereof; And the radial coupling device 100 and the thunder-breaking dispersing device 220 so that the radial coupling device 100 and the lightning pulverizer 220 are in surface contact with each other through the coupling hole 113 and the through- A bolt 230 for a thunder-storm disperser for fastening the hoist 220, and a nut 240 for a thunder-storm disperser.

The through hole 221 is formed so as to be inclined so that the outside diameter is larger than the inside diameter. Accordingly, since the lightning rod 220 and the radome coupling member 100 can be in surface contact with each other, an electrical contact having a low electrical resistance can be realized effectively without using the bolts and nuts 230 and 240 as a whole .

7 is a partial enlarged view of a vehicle including a radome assembly according to another embodiment of the present invention. Referring to FIG. 7, the air vehicle including the radome assembly according to another embodiment of the present invention includes the radome assembly 200; A body 310 of the air vehicle body to which the radome assembly 200 is fastened; A highly conductive layer (320) attached to an outer circumferential surface of the body (310) of the air vehicle; And the radome assembly 200 which penetrates through the fastening fastening holes 112 and fastens the radome assembly 200 to the radome 100 so that the radome fastening member 100 and the high- And includes a fastening bolt 330 and a body fastening nut 340.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory only and are not restrictive of the invention, as claimed, and will be fully understood by those of ordinary skill in the art. The present invention is not limited thereto. It will be apparent to those skilled in the art that various substitutions, modifications and variations are possible within the scope of the present invention, and it is obvious that those parts easily changeable by those skilled in the art are included in the scope of the present invention .

100 radome coupling member
110 exposed portion
111 fastening hole
112 Fastening hole for body coupling
113 Fastening hole for lightning distributor
120 insertion portion
200 radome assembly
210 Radome
211 fastening portion
220 Thunderstorms
221 through hole
230 Bolt for Thruster
240 Nuts for Thunderstroke Disperser
300 Flight Body
310 body
320 High Conductivity Layer
330 Bolt for fastening body
340 Body fastening nut

Claims (9)

An exposed portion 110 exposed to an inner circumferential surface and an outer circumferential surface of the coupling portion 211 of the radome 210; And
And an insertion part 120 protruding from the side of the exposed part 110 in parallel with the coupling part 211 and inserted and fixed between the coupling parts 211,
The exposed portion 110 includes a plurality of fastening holes 111,
The coupling hole 111 is formed on the body side of the flying body and is used for coupling the body and the radome. The coupling hole 111 is formed in the body coupling coupling hole 112, (113) formed at an upper portion of the radial breaker (112) for connecting the radar breaker to the radar coupling member. delete The method according to claim 1,
Wherein the fastening hole (111) is formed so as to be inclined such that the outside diameter is larger than the inside diameter. delete delete The method according to claim 1,
Wherein the thickness of the exposed portion 110 is greater than the thickness of the coupling portion 211 and the thickness of the insertion portion 120 is less than the thickness of the coupling portion 211. [ A radome (100) according to any one of claims 1, 3, and 6, wherein the radome (100) is inserted into the coupling part (211);
A thunderstorm disperser 220 attached to an outer circumferential surface of the radome 210 and having a through hole 221 at one end thereof; And
The radome coupling member 100 and the thunderstroke scattering device 120 are inserted into the through hole 221 and the radome coupling member 100 so that the radial strike dispersion device 220 is in surface contact with the radome coupling device 100. [ 220) and a bolt (230) for a thunderstroke distributor and a nut (240) for a thunderstroke distributor;
≪ / RTI > 8. The method of claim 7,
Wherein the through hole (221) is formed so as to be inclined such that the outside diameter is larger than the inside diameter. A radome assembly (200) of claim 7;
A body 310 of the air vehicle body to which the radome assembly 200 is fastened;
A highly conductive layer (320) attached to an outer circumferential surface of the body (310) of the air vehicle; And
The radome assembly 200 is inserted into the radome assembly 200 by passing through the fastener coupling hole 112 so that the radome coupling member 100 and the high conductive layer 320 are in surface contact with each other, A bolt 330 and a body fastening nut 340;
.
KR1020150156673A 2015-11-09 2015-11-09 Radome coupling member for lihgtning and assembly thereof KR101681558B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102070985B1 (en) * 2019-09-18 2020-01-29 국방과학연구소 Composite aircraft protection device to protect composite aircraft from the indirect effects of lightning strikes
KR102087385B1 (en) 2019-01-30 2020-03-10 국방과학연구소 Streamline-shaped Radome and Method for Manufacturing The same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5841066A (en) * 1996-02-15 1998-11-24 Bocherens; Eric Lightening strip
KR20000060625A (en) 1999-03-18 2000-10-16 정선종 Radome structure for mobile DBS receiving antenna
JP2011225076A (en) * 2010-04-19 2011-11-10 Mitsubishi Aircraft Corp Aircraft cockpit window having electromagnetic shield, and aircraft
KR101424039B1 (en) * 2013-02-19 2014-07-28 국방과학연구소 Smart skin
JP2015168428A (en) * 2014-03-06 2015-09-28 ザ・ボーイング・カンパニーＴｈｅＢｏｅｉｎｇ Ｃｏｍｐａｎｙ Repair apparatus and method for composite panels having conductive layer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5841066A (en) * 1996-02-15 1998-11-24 Bocherens; Eric Lightening strip
KR20000060625A (en) 1999-03-18 2000-10-16 정선종 Radome structure for mobile DBS receiving antenna
JP2011225076A (en) * 2010-04-19 2011-11-10 Mitsubishi Aircraft Corp Aircraft cockpit window having electromagnetic shield, and aircraft
KR101424039B1 (en) * 2013-02-19 2014-07-28 국방과학연구소 Smart skin
JP2015168428A (en) * 2014-03-06 2015-09-28 ザ・ボーイング・カンパニーＴｈｅＢｏｅｉｎｇ Ｃｏｍｐａｎｙ Repair apparatus and method for composite panels having conductive layer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102087385B1 (en) 2019-01-30 2020-03-10 국방과학연구소 Streamline-shaped Radome and Method for Manufacturing The same
KR102070985B1 (en) * 2019-09-18 2020-01-29 국방과학연구소 Composite aircraft protection device to protect composite aircraft from the indirect effects of lightning strikes

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