Miniaturized low-RCS base embedded electrostatic discharger suitable for fixed-wing stealth aircraft

Abstract

The utility model discloses a miniaturized low-RCS base embedded electrostatic discharger suitable for a fixed-wing stealth aircraft, and relates to the technical field of aircraft electrostatic discharge equipment. The electrostatic discharger comprises a pressing lock catch which is arranged in the aircraft skin; one end of the discharge column is self-locked by pressing the lock catch, and the other end extends out of the machine body to serve as a discharge tip; one part of the high-resistance lap joint strip is tightly attached to the aircraft skin through conductive adhesive, and the other part of the high-resistance lap joint strip is arranged on the pressing lock catch; an electrostatic coating is sprayed on the surface of the pressing lock catch, and the pressing lock catch is connected with the high-resistance lap joint strip in an electrostatic conduction mode. The discharge end can be quickly and conveniently replaced and maintained by pressing the lock catch without detaching the aircraft skin, the maintenance cost is reduced, the time is saved, and more economic benefits are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aircraft electrostatic discharge equipment, in particular to a miniaturized low-RCS embedded electrostatic discharge device for fixed-wing stealth aircraft. BACKGROUND

[0002] When the aircraft is flying, continuous friction and collision with air and space particles (dust, raindrops, ice crystals and sand particles, etc.) cause static charges to be generated on the surface of the aircraft. When the static charges accumulate to a certain extent, the air near the tip of the aircraft is broken down, resulting in deposited electrostatic discharge at the tip or protrusion of the aircraft surface, which causes interference to navigation, communication and other systems in a wide frequency range, and in severe cases, causes the aircraft to fail.

[0003] The technical principle solved is that the electrostatic discharge device installed at the rear edge of the aircraft stabilizer or rudder can release the static charges accumulated at these positions using the tip discharge principle, allowing the accumulated charges to be discharged before reaching the wide frequency noise level that causes corona, effectively reducing the corona threshold voltage of the aircraft body surface. The electrostatic discharge device smoothly releases the deposited static charges on the body in a low-noise manner, promoting low-current, relatively high-voltage discharge.

[0004] Traditional electrostatic discharge devices are installed protruding from the outer surface of the aircraft, generally protruding 100mm-200mm, resulting in a large number of protrusions on the original appearance of the aircraft, affecting the appearance, and also having a large RCS, which will produce strong radar target scattering characteristics, damaging the stealth characteristics of the aircraft. Stealth aircraft have good low scattering performance, and there are almost no protruding components on the outer surface of the aircraft, so the electrostatic discharge device is designed to be non-protruding from the aircraft wing structure.

[0005] According to the current search, the current electrostatic discharge devices designed by Aibang Electromagnetic and aviation industry related units are all traditional electrostatic discharge devices, which are installed by riveting and bonding on the outer surface of the aircraft skin. A high-temperature resistant conformal electrostatic discharge device designed by Xi'an Aibang Electromagnetic Technology Co., Ltd. can achieve conformality with the aircraft, but once the discharge device is damaged, the aircraft skin needs to be damaged for replacement, which is costly and time-consuming. And it is a low-resistance electrostatic discharge device, and the discharge noise is relatively large. SUMMARY

[0006] In view of the problems in the prior art, the present application mainly solves the problems of great influence on the appearance structure of an airplane and poor stealth performance of the existing electrostatic discharge device. The present application provides a miniaturized low-RCS embedded electrostatic discharge device for a fixed-wing stealth airplane. The electrostatic discharge device embeds the base of the electrostatic discharge device into the airplane skin, and forms a high-resistance path by using a high-resistance lap joint strip and a pressing lock, instead of a traditional high-resistance discharge rod structure. Compared with the traditional electrostatic discharge device, the electrostatic discharge device effectively reduces the RCS of the electrostatic discharge device and the aerodynamic resistance of the airplane.

[0007] The present application aims to provide a miniaturized low-RCS embedded electrostatic discharge device for a fixed-wing stealth airplane, comprising:

[0008] a pressing lock arranged in the airplane skin;

[0009] a discharge column, one end of which is self-locked by the pressing lock, and the other end of which extends to the outside of the airplane body as a discharge tip;

[0010] a high-resistance lap joint strip, one part of which is tightly attached to the airplane skin by conductive glue, and the other part of which is arranged on the pressing lock;

[0011] the pressing lock is sprayed with an electrostatic coating, and is in electrostatic conduction connection with the high-resistance lap joint strip.

[0012] Preferably, the high-resistance lap joint strip comprises at least two high-resistance lap joint strips, and the at least two high-resistance lap joint strips are lap jointed and fixed to the pressing lock by screws at the lap jointed part.

[0013] Preferably, the high-resistance lap joint strip and the pressing lock jointly form a high-resistance path.

[0014] Preferably, the resistance value of the high-resistance lap joint strip is 6-200 MΩ.

[0015] Preferably, the high-resistance lap joint strip is a flexible non-metal high-resistance lap joint strip.

[0016] Preferably, the end of the discharge column connected with the pressing lock is circumferentially provided with a groove, and the groove is self-locked with the pressing lock.

[0017] The discharge tip of the discharge column is in the shape of a circular truncated cone, and is used for discharging deposited static electricity.

[0018] Preferably, the pressing lock is an automatic rebound pressing self-locking lock.

[0019] Compared with the prior art, the present application has the following advantages:

[0020] The application provides a small-sized low-RCS base-embedded electrostatic discharge device suitable for fixed-wing stealth aircraft.

[0021] The high-resistance lap joint strip and the inner aircraft skin are connected and fixed through conductive glue, which replaces the traditional rivet fastening method, reduces the damage to the aircraft, and also reduces the RCS of the electrostatic discharge device.

[0022] The electrostatic discharge device can quickly and conveniently replace and maintain the discharge end without disassembling the aircraft skin, reduces maintenance cost, saves time, and has more economic benefits.

[0023] Compared with the traditional electrostatic discharge device, the electrostatic discharge device has the advantages of small structure, light weight, low RCS, easy maintenance, effectively reduces the aerodynamic resistance of the aircraft, reduces the consumption of parts, reduces the cost, and solves the problems of the existing electrostatic discharge device, such as great influence on the appearance structure of the aircraft, poor stealth performance and difficult maintenance and replacement. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 The application provides a small-sized low-RCS base-embedded electrostatic discharge device suitable for fixed-wing stealth aircraft.

[0025] Figure 2 The application provides a small-sized low-RCS base-embedded electrostatic discharge device suitable for fixed-wing stealth aircraft.

[0026] Figure 3 The application provides a small-sized low-RCS base-embedded electrostatic discharge device suitable for fixed-wing stealth aircraft.

[0027] Figure 4 The application provides a small-sized low-RCS base-embedded electrostatic discharge device suitable for fixed-wing stealth aircraft. Figure 3 The application provides a small-sized low-RCS base-embedded electrostatic discharge device suitable for fixed-wing stealth aircraft. DETAILED DESCRIPTION

[0028] In order to make those skilled in the art better understand the technical solutions of the application and implement the application, the application will be further described below in conjunction with specific embodiments and drawings, but the embodiments are not limiting to the application.

[0029] The application provides a small-sized low-RCS base-embedded electrostatic discharge device suitable for fixed-wing stealth aircraft, which solves the problems of the existing electrostatic discharge device, such as great influence on the appearance structure of the aircraft and poor stealth performance.

[0030] In order to achieve the above object, referring to Figures 1-4 The small-sized low-RCS embedded electrostatic discharge device for fixed-wing stealth aircraft comprises a pressing lock, a discharge column and a high-resistance connecting strip.

[0031] The pressing lock is arranged in the aircraft skin; one end of the discharge column is self-locked by the pressing lock, and the other end extends to the outside of the aircraft body as a discharge tip; one part of the high-resistance connecting strip is tightly attached to the aircraft skin by conductive glue, and the other part is arranged on the pressing lock; the surface of the pressing lock is sprayed with an electrostatic coating, and is in electrostatic conduction connection with the high-resistance connecting strip.

[0032] Therefore, the electrostatic conduction between the pressing lock and the aircraft skin is realized through the high-resistance connecting strip, and the electrostatic conduction from the pressing lock to the discharge column is realized, so as to form an electrostatic discharge path from the aircraft skin, the high-resistance connecting strip, the pressing lock to the discharge column. The base of the electrostatic discharge device, i.e. the pressing lock, is embedded in the aircraft skin, a high-resistance path is formed by the high-resistance connecting strip and the pressing lock, and the traditional high-resistance discharge rod structure is replaced; the high-resistance connecting strip is connected and fixed to the inner aircraft skin by conductive glue, instead of the traditional rivet fastening method, so as to reduce the damage to the aircraft body and the RCS of the electrostatic discharge device.

[0033] The high-resistance connecting strip is arranged in at least two parts, at least two high-resistance connecting strips are connected, and the connecting part is fixed to the pressing lock by screws. Therefore, the electrostatic on the aircraft body can be efficiently conducted to the discharge column through the arrangement of multiple high-resistance connecting strips.

[0034] The high-resistance connecting strip and the pressing lock jointly form a high-resistance path.

[0035] The resistance value of the high-resistance connecting strip is 6-200MΩ.

[0036] The high-resistance connecting strip is a flexible non-metal high-resistance connecting strip.

[0037] One end of the discharge column connected with the pressing lock is circumferentially provided with a groove, and the groove is self-locked with the pressing lock; the discharge tip of the discharge column is in the shape of a circular truncated cone, and can discharge deposited static electricity. The pressing lock is an automatic rebound pressing self-locking lock. Therefore, the discharge column can be replaced at any time through the pressing lock.

[0038] In order to further illustrate the small-sized low-RCS embedded electrostatic discharge device for fixed-wing stealth aircraft provided by the present application, the device will be described again in combination with the drawings.

[0039] Referring to Figures 1-4As shown, a small-sized low-RCS base-embedded electrostatic discharge device for a fixed-wing stealth aircraft comprises two non-metal L-shaped high-resistance overlapping strips 1, a pressing lock 3, a discharge column 4 and a screw 2. One side of the L-shaped non-metal high-resistance overlapping strip is tightly attached to the aircraft skin through conductive glue, and the other end is bent and overlapped on the pressing lock 3 through the screw. One end of the discharge column 4 is self-locked through the pressing lock, and the other end extends to the outside of the aircraft body as a discharge tip. The end of the discharge column 4 connected with the pressing lock is combined by a cylinder and a circular truncated cone with a groove, and is self-locked with the pressing lock 3 through the groove, forming an electrostatic discharge path from the aircraft skin, the L-shaped high-resistance overlapping strip 1, the pressing lock 3 to the discharge column 4.

[0040] The L-shaped non-metal high-resistance overlapping strip is made of flexible material with a resistance of 6-200 MΩ, and can be adjusted up and down according to the thickness of the trailing edge of the aircraft. The L-shaped non-metal high-resistance overlapping strip has a total length of 20 mm, a width of 10 mm and a thickness of 0.5 mm.

[0041] The pressing lock 3 is a common self-locking fastener on the market, which has a cubic structure with a length of 30 mm, a width of 10 mm and a height of 10 mm. One end has a screw hole with a diameter of 3 mm, and one end has a pair of bent clamps. The surface of the pressing lock 3 is sprayed with an electrostatic coating, which has the ability to conduct static electricity. The discharge column 4 is fastened to the pressing lock 3 by pressing, and can be replaced by pressing again to pop out the discharge column 4.

[0042] The screw 2 is installed in the threaded hole of the pressing lock 3 to overlap the non-metal L-shaped high-resistance overlapping strip 1 with the pressing lock 3.

[0043] The discharge column 4 is combined by a cylinder with a groove and a circular truncated cone. The discharge tip of the discharge column is in the form of a circular truncated cone, which discharges deposited static electricity. The end of the discharge column connected with the pressing lock has a groove for self-locking with the pressing lock 3. The total length is 30 mm, the diameter is 2 mm, and the tip diameter is 1 mm.

[0044] One side of the L-shaped non-metal high-resistance overlapping strip is tightly attached to the aircraft skin through conductive glue, and the other end is bent and overlapped on the pressing lock 3 through the screw.

[0045] The electrostatic discharge path formed by the discharge device comprises the aircraft skin, the L-shaped high-resistance overlapping strip 1, the pressing lock 3 and the discharge column 4. The L-shaped high-resistance overlapping strip 1 and the pressing lock 3 form a high-resistance path, which is equivalent to a high-resistance rod of a traditional electrostatic discharge device.

[0046] The electrostatic discharge method of the fixed-wing stealth aircraft provided by the application is that when the aircraft flies at high altitude, the surface of the aircraft body will rub with air, dust, water droplets and ice crystals and other substances at high speed, thereby generating static electricity. Under the action of an electromagnetic field, the static electricity is concentrated to the edge area of the relatively sharp and thin outer surface of the aircraft. The charged electricity generated by the aircraft will be concentrated to the top end of the discharge device through the aircraft skin - high resistance lap joint - pressing buckle - discharge device tip, and a breakdown discharge will occur between the needle head and the water molecules in the air or cloud layer without too much charge energy accumulation, causing a local very small energy "thunderbolt" effect. In this way, the charge energy accumulated on the surface of the aircraft can be released into the atmosphere. The process of avoiding the formation of high-energy electric energy accumulation and release of the charge, avoiding the electromagnetic field interference on the communication and navigation of the aircraft, protecting the normal operation of the instrument electronic equipment on the aircraft and ensuring the flight safety.

[0047] The preferred embodiments and their effects are described in the present application. However, those skilled in the art can make further changes and modifications to the embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0048] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A miniaturized low RCS pedestal-embedded electrostatic discharge device suitable for use in a fixed-wing stealth aircraft, characterized in that, The application relates to a high-resistance discharge device for an airplane, which comprises the following components: a pressing lock buckle (3) arranged in an airplane skin; a discharge column (4) with one end self-locked through the pressing lock buckle (3) and the other end extended to the outside of the airplane body as a discharge tip; a high-resistance jointing strip (1) with one part tightly adhered to the airplane skin through conductive glue and the other part arranged on the pressing lock buckle (3); the surface of the pressing lock buckle (3) is sprayed with an electrostatic coating and is electrostatically connected with the high-resistance jointing strip (1). The high-resistance jointing strip (1) comprises at least two high-resistance jointing strips (1), the at least two high-resistance jointing strips (1) are jointed, and the jointing position is fixed on the pressing lock buckle (3) through a screw (2). The high-resistance jointing strip (1) and the pressing lock buckle (3) jointly form a high-resistance passage. The resistance value of the high-resistance jointing strip (1) is 6-200 M omega. The high-resistance jointing strip (1) is a flexible nonmetal high-resistance jointing strip.

2. The miniaturized low RCS under-nest ESD for fixed-wing stealth aircraft according to claim 1, characterized in that, The end of the discharge column (4) connected with the pressing lock buckle (3) is circumferentially provided with a groove, and the groove is self-locked with the pressing lock buckle (3).

3. The miniaturized low RCS under-nest ESD for fixed-wing stealth aircraft according to claim 1, characterized in that, The discharge tip of the discharge column (4) is in a circular truncated cone type and is used for discharging deposited static electricity.

4. The miniaturized low RCS under-nest ESD for fixed-wing stealth aircraft according to claim 1, wherein, The pressing lock buckle (3) is an automatic rebound pressing self-locking buckle.

5. The miniaturized low RCS under-nest ESD for fixed-wing stealth aircraft according to claim 1, wherein, ​ 6. The miniaturized low RCS underbelly embedded ESD for fixed wing stealth aircraft of claim 1, wherein, ​ ​ 7. The miniaturized low RCS under-nest ESD for fixed-wing stealth aircraft according to claim 1, characterized in that, ​

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