Lightweight high-temperature-resistant self-cleaning radome

Abstract

The utility model discloses a light high-temperature-resistant self-cleaning radome which comprises a radome body made of a silicon carbide ceramic-based composite layer, a wave absorbing layer is arranged on the outer wall of the radome body, a wave transparent layer is arranged on the outer wall of the wave absorbing layer, an outer skin is arranged on the outer wall of the wave transparent layer, and a self-cleaning layer is arranged on the outer wall of the outer skin. The wave-absorbing layer comprises a carbon foam skeleton with a porous structure, silicon carbide particle layers are attached to the surface of the carbon foam skeleton, a net-shaped structure is formed between the silicon carbide particle layers, and a double-net nested structure is formed between the silicon carbide particle layers and the carbon foam skeleton, so that excellent heat insulation performance is obtained, electromagnetic waves are reflected, absorbed and dissipated back and forth in the wave-absorbing layer, and the wave-absorbing effect is improved. However, in the wave-transparent layer, useful electromagnetic waves can directly penetrate through the wave-transparent layer, so that normal transmission of signals is realized.

Description

Technical Field

[0001] The present application relates to the technical field of radomes, and in particular to a lightweight, high-temperature-resistant, self-cleaning radome. Background Art

[0002] The function of the radome is to protect the electronic components inside the radome from interference from external electromagnetic waves and detection by enemy radars, while ensuring that the signals of some electronic components can be output normally, which puts higher requirements on the existing radome technology. At present, the traditional radome has a relatively single function and is difficult to meet the actual application needs, so improvements are needed.

[0003] The Chinese utility model patent with application number CN202021946179.7 discloses a protective structure of a radome, including a radome protective cover, a honeycomb device, an anti-fall device, a photographic radome and a radome bracket, wherein the photographic radome is arranged on the radome bracket, the photographic radome and the radome bracket are fixedly connected, the radome protective cover is arranged on the photographic radome, the radome protective cover and the photographic radome are connected by bolts, the anti-fall device is snap-fitted on the radome protective cover, and the honeycomb device is snap-fitted on the radome protective cover. The utility model belongs to the technical field of photographic equipment, specifically a protective structure of a radome; the utility model is externally fixed on the radome, and forms protection for the photographic radome itself when it falls or hits. A buffer mechanism is also provided on this structure, which is relatively not easy to be damaged. This structure is used as an adapter, and the honeycomb network card is connected to this structure, which can keep the coating of the radome itself from being damaged, thus forming effective protection.

[0004] The Chinese invention patent with application number CN116381610A invents a radar cover shell, including a shell body, a sealed bottom cover is installed at the bottom of the shell body, a sealing unit is installed at the connection between the sealed bottom cover and the shell body, and multiple positioning units are evenly distributed around the bottom of the shell body, and the positioning units extend to the sealed bottom cover to press the shell body and the sealed bottom cover. The invention realizes the formation of multiple sealing structures between the sealed bottom cover and the shell body by installing a sealing unit between the shell body and the sealed bottom cover, improves the airtightness of the connection between the two, and puts the radar in a safe and stable working environment to avoid being disturbed by external environmental factors. In addition, with the cooperation of the positioning unit, the positioning unit is used to realize the multi-point fixing of the sealed bottom cover, strengthen the connection stability between the shell body and the sealed bottom cover, and avoid the problem of it falling off. The overall installation is convenient and quick, and the workload of the staff is reduced.

[0005] The Chinese invention patent with application number CN202311173892.0 discloses a method for preparing an integrated three-dimensional woven lightweight structure wave-transmitting radome, which belongs to the technical field of composite material radome preparation. The method steps are: the radome preform includes a radome flange and two radome bodies, the two radome bodies are radome bodies one and two respectively; the two radome body skins are sequentially fitted with a three-dimensional woven outer skin preform, an outer adhesive film, a honeycomb sandwich layer, an inner adhesive film and a three-dimensional woven inner skin preform from the outside to the inside; the joint between the first end of the radome body and the second open end of the radome body is sewn in a three-dimensional sewing manner, and the other end of the radome body is connected to the radome flange to form a radome preform; the radome preform is vacuum-introduced and cured using a low-dielectric resin; a functional coating is applied to the surface of the cured radome preform to obtain an integrated three-dimensional woven lightweight structure wave-transmitting radome. This invention is used for the preparation of an integrated three-dimensional woven lightweight structure wave-transmitting radome.

[0006] The Chinese utility model patent with application number CN201820579590.1 discloses a carbon fiber radome, including a carbon fiber radome body, the carbon fiber radome body including a first radome, a second radome and a third radome, and the first groove provided on the lower surface of the first radome is mutually engaged with the first protruding block provided on the upper surface of the second radome, the second protruding block provided on the lower surface of the second radome is mutually engaged with the second groove provided on the upper surface of the third radome, the lightning protection strip provided inside the carbon fiber radome body is filled with carbon fiber, and the protruding block provided at the tail of the carbon fiber radome body is mutually engaged with the groove provided on the upper surface of the base. The utility model solves the problem of bulkiness and easy damage to the radar during transportation by providing the first radome, the second radome, the third radome, the first groove, the first protruding block, the second protruding block, the second groove and the carbon fiber. Utility Model Content

[0007] The utility model aims to provide a lightweight, high-temperature-resistant, self-cleaning radome to overcome the deficiencies in the prior art.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] An embodiment of the present application discloses a lightweight, high-temperature resistant, self-cleaning radome, which is characterized in that it includes a radome body made of a silicon carbide ceramic-based composite layer, the outer wall of the radome body is provided with an absorbing layer, the outer wall of the absorbing layer is provided with a wave-transmitting layer, the outer wall of the wave-transmitting layer is provided with an outer skin, and the outer wall of the outer skin is provided with a self-cleaning layer.

[0010] Furthermore, the wave absorbing layer comprises a porous carbon foam skeleton, a silicon carbide particle layer is attached to the surface of the carbon foam skeleton, a network structure is formed between the silicon carbide particle layers, and a double-network nested structure is formed between the silicon carbide particle layers and the carbon foam skeleton.

[0011] Furthermore, the thickness of the silicon carbide particle layer is 0.2-0.8 μm.

[0012] Furthermore, the thickness of the wave absorbing layer is 15 to 20 mm.

[0013] Furthermore, the wave-transmitting layer is an alumina fiber membrane with a thickness of 10 to 15 mm.

[0014] Furthermore, the outer skin is a carbon fiber reinforced resin-based composite layer skin with a thickness of 0.5 to 0.9 mm.

[0015] Furthermore, the self-cleaning layer has a thickness of 0.2 to 0.5 mm and is formed by spraying a hydrophobic coating.

[0016] Furthermore, a high temperature resistant camouflage coating is sprayed on the outer side of the self-cleaning layer.

[0017] Compared with the prior art, the utility model has the following advantages: the lightweight, high-temperature-resistant, self-cleaning radome has a simple structure, a double-net nested structure is formed between the silicon carbide particle layer and the carbon foam skeleton, and the pore structure inhibits air convection conduction, thereby obtaining excellent thermal insulation performance; electromagnetic waves are reflected, absorbed, and dissipated back and forth inside the absorbing layer, thereby achieving effective absorption of harmful electromagnetic waves, but in the transparent layer, useful electromagnetic waves can directly pass through, thereby achieving normal signal transmission. In addition, the self-cleaning layer can prevent the radome surface from being contaminated and affecting the radome function, thereby improving the radome's absorption / transmission function of electromagnetic waves. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 Shown is a schematic structural diagram of a lightweight, high-temperature-resistant, self-cleaning radome in a specific embodiment of the utility model. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to describe the technical solutions in the embodiments of the utility model in detail. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] Ginseng Figure 1 As shown, a lightweight, high-temperature resistant, self-cleaning radome comprises a radome body 1 made of a silicon carbide ceramic-based composite material, the outer wall of the radome body 1 is provided with an absorbing layer 2, the outer wall of the absorbing layer 2 is provided with a wave-transmitting layer 3, the outer wall of the wave-transmitting layer 3 is provided with an outer skin 4, and the outer wall of the outer skin 4 is provided with a self-cleaning layer 5.

[0024] In this technical solution, the radome body and the absorbing layer made of silicon carbide ceramic-based composite layers are both lightweight and high-strength materials with stable performance at high temperatures, which improves the overall strength and high temperature resistance of the radome and facilitates lightweight design.

[0025] For example, see Figure 1 As shown, a silicon carbide particle layer is provided on the surface of the carbon foam skeleton, and the thickness of the silicon carbide particle layer is 0.5 μm.

[0026] In this technical solution, a silicon carbide particle layer is deposited on the surface of the carbon foam skeleton by chemical vapor deposition, and the silicon carbide particle layer can improve the overall strength.

[0027] For example, see Figure 1 As shown, the thickness of the absorbing layer 2 is 15 mm.

[0028] In this technical solution, the thickness of the absorbing layer is relatively thin, which can ensure an effective absorbing range while reducing the overall weight of the protective cover as much as possible.

[0029] For example, see Figure 1 As shown, the wave-transmitting layer 3 is a 20 μm thick aluminum oxide fiber membrane.

[0030] In this technical solution, some useful electromagnetic waves can directly pass through the alumina fiber membrane, thereby realizing normal transmission of useful electromagnetic waves.

[0031] For example, see Figure 1 As shown, the outer skin 4 is a 0.8 mm thick carbon fiber reinforced resin-based composite layer skin.

[0032] In this technical solution, a carbon fiber reinforced resin-based composite layer skin is used as the outer skin, a radome body made of a silicon carbide ceramic-based composite layer is used as the inner skin, and an absorbing layer and a reflecting layer are used as core materials to make a radome that can simultaneously absorb and transmit electromagnetic waves.

[0033] For example, see Figure 1 As shown, the outer side of the outer skin 4 is sprayed with a self-cleaning layer 5 .

[0034] In this technical solution, a self-cleaning layer is sprayed on the outside of the outer skin, which can achieve self-cleaning of the radome.

[0035] In summary, the lightweight, high-temperature resistant, self-cleaning radome has a simple structure. The silicon carbide particle layer and the carbon foam skeleton form a double-net nested structure. The porous structure inhibits air convection conduction and obtains excellent thermal insulation performance. The electromagnetic waves are reflected, absorbed and dissipated back and forth inside the absorbing layer, thereby achieving effective absorption of harmful electromagnetic waves. However, in the transparent layer, useful electromagnetic waves can directly pass through to achieve normal signal transmission. In addition, the self-cleaning layer can prevent the surface of the radome from being contaminated and affecting the function of the radome, thereby improving the radome's absorption / transmission function of electromagnetic waves.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0037] The above is only a specific implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A lightweight, high temperature resistant, self-cleaning radome, characterized in that: The invention comprises a radome body made of a silicon carbide ceramic-based composite layer, wherein the outer wall of the radome body is provided with a wave-absorbing layer, the outer wall of the wave-absorbing layer is provided with a wave-transmitting layer, the outer wall of the wave-transmitting layer is provided with an outer skin, and the outer wall of the outer skin is provided with a self-cleaning layer.

2. According to the lightweight, high-temperature resistant and self-cleaning radome of claim 1, the absorbing layer comprises a carbon foam skeleton with a porous structure, a silicon carbide particle layer is attached to the surface of the carbon foam skeleton, a network structure is formed between the silicon carbide particle layers, and a double-network nested structure is formed between the silicon carbide particle layers and the carbon foam skeleton.

3. The lightweight, high temperature resistant, self-cleaning radome according to claim 2, characterized in that: The thickness of the silicon carbide particle layer is 0.2-0.8 μm.

4. The lightweight, high temperature resistant, self-cleaning radome according to claim 1, characterized in that: The thickness of the wave absorbing layer is 15 to 20 mm.

5. The lightweight, high temperature resistant, self-cleaning radome according to claim 1, characterized in that: The wave-transmitting layer is an aluminum oxide fiber membrane with a thickness of 10 to 15 mm.

6. The lightweight, high temperature resistant, self-cleaning radome according to claim 1, characterized in that: The outer skin is a carbon fiber reinforced resin-based composite layer skin with a thickness of 0.5 to 0.9 mm.

7. The lightweight, high temperature resistant, self-cleaning radome according to claim 1, characterized in that: The self-cleaning layer has a thickness of 0.2 to 0.5 mm and is formed by spraying a hydrophobic coating.

8. The lightweight, high temperature resistant, self-cleaning radome according to claim 1, characterized in that: The outer side of the self-cleaning layer is sprayed with a high temperature resistant camouflage coating.

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