Lightning strike protection flying device with fairing

Abstract

The present invention provides a lightning protection flight equipment with a fairing, which belongs to the field of flight equipment structural design, and includes a fairing, a flight equipment mounting base, a load mounting base, a device harness through hole, a flight equipment body, and a harness adapter unit; the flight equipment mounting base is arranged above the top of the flight equipment body; the load mounting base is installed on the flight equipment mounting base by screwing; the fairing is fixed on the flight equipment mounting base; the device harness through hole leads the airtight wire of the flight equipment to the fairing, and completes the aviation plug docking outside the cabin; the harness adapter unit provides an aviation plug interface outside the cabin for the load harness; and a lightning protection metal block and a lightning protection metal net are arranged in the fairing. The present invention arranges the fairing on the top of the flight equipment, and maximizes the longitudinal size of the fairing, allowing the flight equipment to carry a variety of communication equipment for high-altitude payloads such as satellites.

Description

Technical Field

[0001] The invention belongs to the field of flight equipment structure design, and in particular relates to a lightning protection flight equipment with a fairing. Background Art

[0002] Normally, the radar equipment of flight equipment usually has a complex shape and contour. Without adding a fairing, the aerodynamic shape of the flight equipment will be greatly damaged, the flight resistance will be increased, uncontrollable vibration will be generated, and the flight stability will be seriously affected. The existing flight equipment fairing is usually located on the belly of the flight equipment due to the location of the radar, which is used for ground observation and communication. Due to the isolation effect of the flight equipment body, it cannot meet the communication and observation requirements of satellite targets such as high altitude. In addition, when the communication radar is located on the bulge on the upper part of the flight equipment, the radar antenna of the early warning aircraft is located on the back of the flight equipment, and the fairing cannot be set, and the rapid disassembly of the load system cannot be achieved. The interchangeability and versatility are poor, and it can only meet the installation and use of specific radars.

[0003] The prior art has the following fairing devices for the top radar of flight equipment, such as Chinese patent application CN112623185A (a fairing bracket with a rudder), Chinese utility model patent CN215451764U (a speed reduction bleed air cooling device in a flight equipment antenna cover), and Chinese patent application CN108860567A (a flight equipment antenna cover device and method). However, all of the above methods have the disadvantages that the fairing protrudes from the fuselage, the supporting structure is complex, the weight is large, and it is not easy to disassemble.

[0004] Therefore, there is an urgent need to design a flying device with a fairing that can be quickly disassembled and replaced, has a large effective space, and can meet the use requirements of different loads. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a lightning protection flying device with a fairing.

[0006] In order to achieve the above object, the present invention adopts the following technical scheme:

[0007] A lightning protection flight device with a fairing, characterized in that it includes a fairing, a flight device mounting base, a load mounting base, a device harness through hole, a flight device body, and a harness adapter unit;

[0008] The flight equipment mounting base is arranged above the top of the flight equipment body, is consistent with the outer contour of the cross section of the lightning protection flight equipment and is permanently connected; the load mounting base is installed on the flight equipment mounting base by bolt connection, and a rigid connection with the flight equipment body is achieved through the flight equipment mounting base; all loads are fixed on the adapter plate, the adapter plate is connected to the load mounting base by bolts, and the fairing is fixed on the load mounting base; the equipment harness via is arranged on the flight equipment mounting base, and the airtight wire of the lightning protection flight equipment is led to the fairing, and the aviation plug docking is completed outside the cabin of the lightning protection flight equipment; the harness adapter unit provides an out-of-cabin aviation plug interface for the load harness;

[0009] The fairing consists of a cover body and an aluminum frame, the lower edge of the cover body is connected to the aluminum frame, and a fixing hole is arranged at the connection between the aluminum frame and the cover body for placing a lightning protection metal block; a bolt hole is arranged in the middle of the lightning protection metal block for accommodating a mounting bolt, and the aluminum frame is fixedly connected to two side surfaces of a load mounting base by mounting bolts; a groove is opened on the outer edge of the lightning protection metal block, and a lightning protection metal mesh is laid on the surface in the groove that contacts the cover body; the lightning protection metal mesh is in contact with the lightning protection metal block; the lightning protection metal mesh, lightning protection metal block, mounting bolts, aluminum frame, load mounting base, flight equipment mounting base, and flight equipment body sequentially form a conductive channel to achieve the effect of lightning protection.

[0010] Furthermore, the one-way transmittance for L-band electromagnetic waves is greater than 95%.

[0011] Furthermore, the flight equipment mounting base adopts a semi-hollow design, with crossed transverse reinforcement ribs and longitudinal reinforcement ribs arranged inside.

[0012] Furthermore, the cover body is a long semi-teardrop-shaped structure, formed in one piece, with a straight equal-section structure in the middle, and the height of the cover body is 132 mm, the width is 321 mm, and the length is 1081 mm.

[0013] Furthermore, a lightning protection metal mesh is arranged at the front and rear parts of the long semi-teardrop-shaped structure of the cover body; the lightning protection metal mesh is formed by weaving a strip-shaped structure.

[0014] Furthermore, the wave-transmitting area at the uniform cross-sectional structure of the cover body adopts a honeycomb sandwich structure, and the honeycomb sandwich is dry-formed by an inner panel, an outer panel, and a middle honeycomb core. The honeycomb core adopts hexagonal lattice cardboard, and the inner panel and the outer panel are both made of fiberglass. The edge of the cover body and the front and rear parts of the long semi-teardrop structure are made of fiberglass.

[0015] Furthermore, the outer surface of the fairing is coated with antistatic paint and rain erosion resistant paint.

[0016] Furthermore, the thickness of the aluminum frame is 5 mm, and the cover body and the aluminum frame are connected at the connection point by means of mounting bolts, and both sides of the mounting bolts are bonded by means of adhesive strips.

[0017] Furthermore, the fairing is mounted on a vertical flange on the load mounting base.

[0018] Furthermore, the cover body and the aluminum frame are sealed to prevent rainwater from entering the fairing.

[0019] Beneficial effects:

[0020] 1. The present invention solves the problem of integrating multiple types of satellite communication payloads. Taking the present invention as an example, it is a 4-type payload. Each type of payload does not need to be designed with a separate fairing. In addition, the present invention sets the fairing on the top of the flight equipment and maximizes the longitudinal size of the fairing (i.e., the length is 1081mm). The fully enclosed space provides a good working environment and universal interface for the payload. Due to the addition of the fairing and modification equipment on the top of the flight equipment, the flight equipment is allowed to carry a variety of communication equipment for high-altitude payloads such as satellites.

[0021] 2. The fairing of the present invention has a lightning protection function, which improves the safety and economy of the load system. Each type of load does not need to be tested for lightning protection separately, which effectively reduces the design difficulty, design cost and the destructive risk caused by lightning strikes.

[0022] 3. The design of the load mounting base of the present invention improves the ability to quickly switch between different loads. Different load mounting bases are provided for different loads, and different modules of the load are integrated and installed on the load mounting base on the ground, and then the load mounting base is installed on the flight equipment mounting base.

[0023] 4. The present invention can quickly disassemble the load system and restore the original configuration of the flight equipment. It only needs to remove the fairing, load mounting base, and harness adapter unit. Because the load mounting base is conformal to the flight equipment, after the equipment is removed, the flight equipment has no convex or concave structure, and the original aerodynamic performance of the flight equipment is maintained. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of a fairing of the present invention;

[0025] Figure 2 is a schematic diagram of a wiring harness adapter unit;

[0026] Figure 3 Diagram of the setup of metal blocks to protect against lightning strikes.

[0027] Among them, 1-fairing, 2-flight equipment mounting base, 3-load mounting base, 4-equipment harness through hole, 5-flight equipment body, 6-load, 7-cover, 8-aluminum frame, 9-fixing hole, 10-lightning protection metal block, 11-lightning protection metal mesh. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0029] like Figure 1 As shown, a lightning protection flight device with a fairing of the present invention includes a fairing 1, a flight device mounting base 2, a load mounting base 3, a device harness through hole 4, a flight device body 5, and a harness adapter unit.

[0030] The flight equipment mounting base 2 is installed above the top of the flight equipment body 5, the fairing 1 is fixed on the flight equipment mounting base 2, the load mounting base 3 is installed on the flight equipment mounting base 2, and the flight equipment mounting base 2 provides a mounting platform for the load mounting base 3. The load mounting base 3 is rigidly connected to the flight equipment body 5 through the flight equipment mounting base 2 to form a good seal. All loads 6 and equipment are fixed on the adapter plate, and the load 6 is not directly connected to the flight equipment body 5. Since the load 6 needs to be frequently disassembled, in order to ensure the safety and reliability of the flight equipment body 5, preferably, the adapter plate is connected to the load mounting base 3 by bolt connection. The flight equipment mounting base 2 is consistent with the outer contour of the flight equipment section, and a riveting fixing method is adopted to achieve a permanent connection with the flight equipment. The radar equipment is mounted on the top of the flight equipment modification platform, and the fairing 1 of the present invention is designed and installed on the periphery of the radar equipment.

[0031] In order to improve the versatility of the modification platform, the present invention adds a device harness via 4 on the flight equipment mounting base 2 without destroying the original structural parts of the flight equipment, leads the airtight wire of the flight equipment to the fairing area, and completes the aviation plug docking outside the cabin. Under the premise of meeting the wiring requirements of multiple types of loads, ensure that the airtight installation of the whole machine is reliable. The device harness passes through the device harness via 4, and is cross-linked with the harness of the flight equipment outside the cabin of the flight equipment to complete power supply and signal exchange.

[0032] Preferably, the flight equipment mounting base 2 adopts a semi-hollow design, with crossed transverse reinforcement ribs and longitudinal reinforcement ribs arranged inside to achieve structural lightweight and installation rigidity requirements.

[0033] Preferably, the fairing 1 is a long semi-teardrop-shaped structure with a straight equal-section structure in the middle, which makes full use of the space on the top of the flight equipment. The equal-section structure serves as a wave-transmitting area. The fairing 1 has the characteristics of large space and strong adaptability, and can meet the installation of a variety of different loads. Preferably, the height of the fairing 1 is 132 mm, the width is 321 mm, and the length is 1081 mm.

[0034] Preferably, the fairing 1 is in close contact with the flight equipment body 5 and has a low cross-sectional height to reduce the impact on the aerodynamic performance of the flight equipment; the fairing 1 is sealed circumferentially with sealant to prevent low-temperature and humid airflow from entering the fairing 1 to form condensed water, causing equipment short circuit and a decrease in the wave transmission performance of the fairing.

[0035] Preferably, the cover body is mainly composed of a composite cover body 7 and an aluminum frame 8, which ensures that the cover body 7 and the aluminum frame 8 are reliably connected under the action of a 400KM / h incoming flow, and there are no obvious protrusions on the outer surface that affect aerodynamics. The cover body 7 and the aluminum frame 8 are sealed to prevent rainwater from entering the fairing 1.

[0036] Preferably, the cover body 7 is integrally formed, and has good structural strength and strong wind resistance.

[0037] Preferably, Figure 2 As shown, the harness adapter unit provides an extracabin aviation plug interface for the load harness. The top harness of the flight equipment passes through the cabin. The original aperture of the flight equipment when it leaves the factory is 32mm, the power cord diameter is 20mm, the aviation plug diameter is 35mm, the high-frequency cable diameter is 7mm, and the aviation plug diameter is 15mm. If the opening diameter of the flight equipment is directly increased, the cost of airworthiness certification and modification will increase, the cycle will be extended, and the opening position will need to be locally strengthened. Therefore, under the premise of the original aperture, a harness adapter unit is set to complete the layout of the load system harness. It is only necessary to make the power cord take the extracabin end and complete the connection with the aviation plug, which extends the airtight line of the flight equipment and effectively reduces the opening size caused by the harness passing through the cabin.

[0038] Preferably, Figure 3 As shown, the lower edge of the cover body 7 is connected to an aluminum frame 8, and a fixing hole 9 is provided at the connection between the aluminum frame 8 and the cover body 7 for placing a lightning protection metal block 10. A bolt hole is provided in the middle of the lightning protection metal block 10 for accommodating mounting bolts. The aluminum frame 8 is fixedly connected to the two side surfaces of the load mounting base 3 by mounting bolts. The outer edge of the lightning protection metal block 10 is grooved, and the surface in the groove that contacts the cover body 7 is paved with a lightning protection metal mesh 11. The lightning protection metal mesh 11, the lightning protection metal block 10, the mounting bolts, the aluminum frame 8, the load mounting base 3, the flight equipment mounting base 2, and the flight equipment body 5 sequentially form a conductive channel to achieve a protection effect against lightning strikes.

[0039] Preferably, the lightning protection metal mesh 11 is used to protect the antenna equipment in the fairing 1. The lightning protection metal mesh 11 is formed by a strip-shaped structure, which is not only arranged in the lightning protection metal block 10, but also arranged in the middle of the front and rear parts of the long semi-waterdrop-shaped structure of the cover body 7. The area of ​​the lightning protection metal mesh 11 is relatively large, and the lightning protection metal block 10 is only partially installed, and the two are in contact, such as Figure 1 As shown, the black strip indicates the position of the lightning protection metal mesh 11.

[0040] like Figure 3 As shown, the structure of the wave-transmitting area at the uniform cross-sectional structure of the cover body 7 adopts a honeycomb sandwich form, and the honeycomb sandwich is formed by a dry method by sandwiching a honeycomb core between an inner panel and an outer panel, and the honeycomb core adopts a hexagonal grid paperboard, and the inner panel and the outer panel are both made of fiberglass. The honeycomb core is used to meet the wave transmission rate. The edge area of ​​the cover body and the front and rear parts of the long semi-waterdrop structure are made of fiberglass, and its honeycomb-free structure makes the installation strength better. The environmental adaptability of the fiberglass material is excellent.

[0041] Preferably, the outer surface of the fairing 1 is coated with antistatic paint and rain erosion resistant paint, preferably white three-proof paint.

[0042] Preferably, the thickness of the aluminum frame 8 is 5 mm, and the cover body 7 and the aluminum frame 8 are connected by mounting bolts, and both sides of the mounting bolts are bonded by adhesive strips.

[0043] Preferably, the aluminum frame 8 is pre-buried in the cover body 7, and the aluminum frame 8 is bonded to the cover body 7 made of glass fiber reinforced plastic material by resin to form a whole.

[0044] Preferably, the flight equipment mounting base 2 is rigidly connected and fixed to the flight equipment body 5, and the mounting points are all located at the main load-bearing structural parts of the flight equipment, such as the cross beams and longitudinal beams of the flight equipment skeleton truss structure. The top load weight of the flight equipment body 5 can be effectively dispersed and transmitted to the flight equipment body 5, thereby improving the load-bearing capacity of the top area, and the maximum effective load-bearing capacity is greater than 300kg.

[0045] Preferably, the load mounting base 3 is fixed to the flight equipment mounting base 2 by screw connection. The load mounting base can be flexibly changed according to different system loads to quickly complete the switching of the mission system.

[0046] Preferably, the fairing 1 is installed on the vertical flange on the load mounting base 3, and the circumferential conformal design is fitted. Under the action of gravity, the fairing 1 can quickly complete self-positioning on the load mounting base 3, which is convenient for subsequent screw fixing operations.

[0047] Preferably, all or part of the fairing 1, the flight equipment mounting base 2, the payload mounting base 3, the equipment harness via 4, and the harness adapter unit are made into a whole, which has efficient assembly and good integration.

[0048] Preferably, the lightning protection metal mesh 11 is an integral component.

[0049] Preferably, the fairing 1 adopts an aluminum frame 8 to achieve lightweight. At the same time, the aluminum frame 8 can improve the rigidity of the fairing 1 and reduce deformation during transportation and installation.

[0050] Preferably, the lightning protection metal mesh 11 in front and behind the fairing 1 is connected to the flight equipment body 5 to ensure that the antenna in the fairing will not be damaged by atmospheric lightning.

[0051] Preferably, the load mounting base 3 improves the ability of fast switching of different loads. The present invention provides different load mounting bases 3 for different loads, and different modules of the loads are integrated and installed on the load mounting base 3 on the ground, and then the load mounting base 3 is installed on the flight equipment mounting base 2.

[0052] Preferably, the airtight wire is locally led to the area of ​​the fairing 1, which effectively shortens the length of the wire harness and realizes a lightweight design of the system.

[0053] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A lightning protection flight device with a fairing, characterized in that: It includes a fairing, a flight equipment mounting base, a payload mounting base, equipment harness through holes, a flight equipment body, and a harness adapter unit; The flight equipment mounting base is arranged above the top of the flight equipment body, is consistent with the outer contour of the cross section of the lightning protection flight equipment and is permanently connected; the load mounting base is installed on the flight equipment mounting base by bolt connection, and a rigid connection with the flight equipment body is achieved through the flight equipment mounting base; all loads are fixed on the adapter plate, the adapter plate is connected to the load mounting base by bolts, and the fairing is fixed on the load mounting base; the equipment harness through hole is arranged on the flight equipment mounting base, Lead the airtight wire of the lightning protection flight equipment to the fairing, and complete the aviation plug docking outside the cabin of the lightning protection flight equipment; the wiring harness adapter unit provides an out-of-cabin aviation plug interface for the load wiring harness; The fairing consists of a cover body and an aluminum frame, the lower edge of the cover body is connected to the aluminum frame, and a fixing hole is arranged at the connection between the aluminum frame and the cover body for placing a lightning protection metal block; a bolt hole is arranged in the middle of the lightning protection metal block for accommodating a mounting bolt, and the aluminum frame is fixedly connected to two side surfaces of a load mounting base by mounting bolts; a groove is opened on the outer edge of the lightning protection metal block, and a lightning protection metal mesh is laid on the surface in the groove that contacts the cover body; the lightning protection metal mesh is in contact with the lightning protection metal block; the lightning protection metal mesh, lightning protection metal block, mounting bolts, aluminum frame, load mounting base, flight equipment mounting base, and flight equipment body sequentially form a conductive channel to achieve the effect of lightning protection.

2. The lightning protection flying device with a fairing according to claim 1, characterized in that: The flight equipment mounting base adopts a semi-hollow design, with crossed transverse reinforcement ribs and longitudinal reinforcement ribs arranged inside.

3. The lightning protection flying device with a fairing according to claim 1, characterized in that: The cover body is a long semi-teardrop-shaped structure, formed in one piece, with a straight equal-section structure in the middle. The height of the cover body is 132 mm, the width is 321 mm, and the length is 1081 mm.

4. The lightning protection flying device with a fairing according to claim 3, characterized in that: The front and rear parts of the long semi-waterdrop-shaped structure of the cover body are arranged with lightning protection metal mesh; the lightning protection metal mesh is formed by weaving a strip-shaped structure.

5. The lightning protection flying device with a fairing according to claim 3, characterized in that: The wave-transmitting area at the uniform cross-sectional structure of the cover body adopts a honeycomb sandwich structure, and the honeycomb sandwich is dry-formed by an inner panel, an outer panel, and a middle honeycomb core. The honeycomb core adopts hexagonal lattice cardboard, and the inner panel and the outer panel are both made of fiberglass. The edge of the cover body and the front and rear parts of the long semi-teardrop structure are made of fiberglass.

6. The lightning protection flying device with a fairing according to claim 1, characterized in that: The outer surface of the fairing is coated with antistatic paint and rain erosion resistant paint.

7. The lightning protection flying device with a fairing according to claim 1, characterized in that: The thickness of the aluminum frame is 5 mm. The cover body and the aluminum frame are connected at the connection point by means of mounting bolts, and both sides of the mounting bolts are bonded by means of adhesive strips.

8. The lightning protection flying device with a fairing according to claim 1, characterized in that: The fairing is mounted on a vertical flange on the load mounting base.

9. The lightning protection flying device with a fairing according to claim 1, characterized in that: The cover body and the aluminum frame are sealed to prevent rainwater from entering the fairing.

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