CN211688885U - Infrared stealthy coating structure and have its generator - Google Patents
Infrared stealthy coating structure and have its generator Download PDFInfo
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- CN211688885U CN211688885U CN201922402161.4U CN201922402161U CN211688885U CN 211688885 U CN211688885 U CN 211688885U CN 201922402161 U CN201922402161 U CN 201922402161U CN 211688885 U CN211688885 U CN 211688885U
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Abstract
The utility model discloses an infrared stealthy coating structure, which comprises a first heat-insulating layer, a first heat-conducting layer, a heat-absorbing layer, a second heat-conducting layer and a second heat-insulating layer which are arranged from outside to inside in sequence, wherein the heat-absorbing layer is made of hydrogel phase-change composite materials, the first heat-insulating layer and the second heat-insulating layer are made of aerogel or composite aerogel materials, and the first heat-conducting layer and the second heat-conducting layer are made of metal-based composite materials for heat management; the heat absorbing layer can reduce the thermal infrared characteristic of the covered object; the first heat insulation layer and the second heat insulation layer can realize heat insulation and sound insulation; the first heat conduction layer and the second heat conduction layer can transfer heat to the whole heat conduction layer, so that the heat is uniformly distributed and fully contacted with the heat absorption layer, and the heat absorption layer can uniformly absorb and release the heat; the utility model discloses it is effectual to give sound insulation and thermal-insulated and infrared stealthy, light in weight, small. The utility model discloses a generator with infrared stealthy coating can reduce the hot infrared characteristic of generator, wholly reduces the interior temperature of generator storehouse.
Description
Technical Field
The utility model belongs to the technical field of infrared detection, especially, relate to an infrared stealthy coating structure and have its generator.
Background
With the continuous improvement of infrared detection, sound detection and monitoring techniques and equipment performance in modern war, higher and higher requirements are put on the concealment of personnel and equipment. For example, in field operations, the stealth requirement for the fabric worn by personnel is that most of the prior art are cloak geothermal radiation blankets, and although infrared detection can be avoided in a short time, the surface temperature of the blanket is still higher than the ambient temperature after a long time. A sound insulation, heat insulation and infrared hiding method for equipment such as a field portable generator or an armored vehicle with an internal heat source generally adopts porous fiber materials such as polyester fiber cotton sound insulation cotton, centrifugal glass cotton, rock wool, mineral wool and the like to prevent internal heat from being emitted and simultaneously obstruct sound transmission to achieve a sound insulation effect, but the hiding effect of the porous fiber materials of the existing covering is not ideal, in order to achieve an ideal effect, the thickness of the porous fiber materials needs to be increased, so that the size and the weight of the covering are large, and meanwhile, the floating and the diffusion of tiny fiber particles of the porous fiber materials easily affect the health of operators and the use of precision equipment.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides an infrared stealth coating structure and have its generator.
The utility model discloses an infrared stealthy coating structure, include by outer first insulating layer, first heat-conducting layer, heat-sink shell, second heat-conducting layer and the second insulating layer that sets gradually to interior, wherein aquogel phase transition combined material is chooseed for use to the heat-sink shell, aerogel or compound aerogel material are chooseed for use to first insulating layer and second insulating layer, metal base combined material is used in the heat management for the first heat-conducting layer and the second heat-conducting layer chooseed for use.
Preferably, in the above technical scheme, the first heat conduction layer and the second heat conduction layer are made of an aluminum-based composite material, a copper-based composite material or a magnesium-based composite material.
Preferably, in the above technical scheme, the first thermal insulation layer and the second thermal insulation layer are made of silicon-based aerogel materials.
Preferably, the thicknesses of the first heat-insulating layer, the first heat-conducting layer, the heat-absorbing layer, the second heat-conducting layer and the second heat-insulating layer are respectively 4-6mm, 0.5-1.5mm, 5-7mm, 0.5-1.5mm and 4-6 mm.
Preferably, in the above technical solution, the thicknesses of the first heat-insulating layer, the first heat-conducting layer, the heat-absorbing layer, the second heat-conducting layer and the second heat-insulating layer are 5mm, 1mm, 6mm, 1mm and 5mm, respectively.
The utility model discloses a generator with infrared stealthy coating, including the shell, generate heat the source and like aforementioned infrared stealthy coating structure, the outside in source that generates heat is located to infrared stealthy coating structure, infrared stealthy coating is located on the inner wall of shell.
Preferably, the shell is made of carbon fiber material.
The utility model has the advantages and positive effects that: the utility model provides an infrared stealth coating structure, which comprises a first heat-insulating layer, a first heat-conducting layer, a heat-absorbing layer, a second heat-conducting layer and a second heat-insulating layer which are arranged from outside to inside in sequence, wherein the heat-absorbing layer can reduce the thermal infrared characteristics of a covered object and realize self-adaptation to the environmental infrared radiation characteristics, thereby realizing infrared stealth; the first heat insulation layer and the second heat insulation layer can realize heat insulation and sound insulation; the first heat conduction layer and the second heat conduction layer can transfer heat to the whole heat conduction layer, so that the heat is uniformly distributed, the first heat conduction layer and the second heat conduction layer are fully contacted with the heat absorption layer, the heat absorption layer can uniformly absorb and release the heat, and the occurrence of hot spots is avoided to the maximum extent; the utility model discloses it is effectual to give sound insulation and thermal-insulated and infrared stealthy, light in weight, small. The utility model provides a generator with infrared stealthy coating can reduce the hot infrared characteristic of generator, wholly reduces the interior temperature of generator storehouse.
Drawings
Fig. 1 is a schematic structural diagram of an infrared stealth coating structure provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a generator according to an embodiment of the present invention.
Wherein: 1. a first insulating layer; 2. a first thermally conductive layer; 3. a heat absorbing layer; 4. a second thermally conductive layer; 5. a second thermal insulation layer; 6. a housing; 7. a heat generating source.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In one aspect, the present embodiment provides an infrared stealth coating structure, as shown in fig. 1, including a first heat-insulating layer 1, a first heat-conducting layer 2, a heat-absorbing layer 3, a second heat-conducting layer 4, and a second heat-insulating layer 5, which are sequentially arranged from outside to inside, where the heat-absorbing layer is made of a hydrogel phase-change composite material, the first heat-insulating layer and the second heat-insulating layer are made of a composite aerogel material, and the first heat-conducting layer and the second heat-conducting layer are made of a metal-based composite material for heat management.
Further, the heat-absorbing layer 3 is the core layer of infrared stealthy coating structure, and the heat-absorbing layer comprises aquogel phase change composite, can pin a large amount of phase change materials of high specific heat capacity, can absorb a large amount of heats under the prerequisite that the temperature does not have obvious change when unit work, realizes the thermal buffer function, can reduce the thermal infrared characteristic by the covering on the one hand, can realize the self-adaptation to environment infrared radiation characteristic on the one hand to realize infrared stealthy. Meanwhile, when the unit stops working, the heat can be slowly released to match the surrounding environment.
Optionally, the hydrogel selected for the heat absorbing layer in this embodiment is a hydrogel containing a phase-change material, the water content and the phase-change material are higher than 50wt%, and the surface of the hydrogel is subjected to waterproof treatment, so that the hydrogel is a light, thin, firm and flexible composite material; meanwhile, the hydrogel layer can be made into a plurality of layers of hydrogel layers with density gradients, and the hydrogel layers are respectively adsorbed and blocked aiming at sound waves of high frequency, medium frequency and low frequency, so that the aim of muting is fulfilled.
Further, the first heat conducting layer 2 and the second heat conducting layer 4 are arranged on two sides of the heat absorbing layer, and both the first heat conducting layer and the second heat conducting layer are made of high heat conducting materials, such as metal matrix composite materials for heat management, for example, aluminum matrix composite materials such as silicon/aluminum, silicon carbide/aluminum, carbon fiber/aluminum and the like, or copper matrix composite materials of diamond/copper or lighter magnesium matrix composite materials. These materials have the performance advantages of light weight, low cost and processability. After a certain hot point protrudes, heat can be rapidly transferred to the whole heat conducting layer, so that the heat is uniformly distributed; meanwhile, the heat conducting layer transfers heat to the radiating fins, and the fan radiates the heat, so that the temperature in the generator bin is integrally reduced; the heat conducting layer is in full contact with the heat absorbing layer, so that the heat absorbing layer can uniformly absorb and release heat, and the occurrence of a prominent hot spot is avoided to the maximum extent.
Optionally, in this embodiment, the first heat conducting layer and the second heat conducting layer are made of a lighter magnesium-based composite material: the SiCp/Mg thermal management composite material has the thermal conductivity of 230W/(m × K) and the density of less than 2.8g/cm3, and can realize the purpose of heat conduction only by a thin layer;
further, the first heat insulation layer 1 and the second heat insulation layer 5 are made of composite aerogel or aerogel materials. The aerogel is a high-quality and high-efficiency sound-insulation and heat-insulation material, has light weight, extremely high porosity (more than 90 percent), and a mesoporous structure (2-50 nm) formed by mutually connecting nano-network frameworks, can effectively reduce the solid-heat phase conduction of the material, and effectively inhibits the gas-phase heat transfer, thereby having excellent heat-insulation performance; meanwhile, due to the low sound velocity characteristic of the silicon-based aerogel, the silicon-based aerogel becomes an ideal acoustic delay and high-temperature sound insulation material, the acoustic impedance variable range of the material is large (103-107 kg/m 2-s), the average sound absorption coefficient is not less than 0.80 in the frequency range of 125-4000Hz, the silicon-based aerogel has excellent sound absorption performance, and meanwhile, the sound absorption performance is not changed after other materials (such as water spraying, ash spraying and other substance soaking) are mixed.
Optionally, in this embodiment, a silicon-based aerogel is prepared by using the prior art, specifically: preparing a SiO2 aerogel base material by adopting an acid-base two-step method through a Sol-gel process, and adding a mid-infrared absorbent beta-chloroethyldimethylamine hydrochloride (beta-DCH) in the aging process to prepare the broadband infrared absorption silicon-based composite aerogel, wherein the density of the base material is 0.25g/cm3, and the density of the composite aerogel is 0.36-0.54 g/cm 3; the ammonium salt is attached to the silicon aerogel network in a spherical or fast form; the base material belongs to a mesoporous material, after the ammonium salt is added, the composite aerogel continuously transits to a non-porous and macroporous material, the specific surface area ranges from 1.69 m to 103.5 m2/g, the maximum pore volume ranges from 0.007 cm to 0.26cm3/g, and the average pore diameter ranges from 10.4 nm to 18.7 nm. The composite aerogel has the broadband absorption performance of middle and far infrared rays, and the relative absorption intensity of the middle and far infrared rays is proportionally enhanced along with the increase of the content of beta-DCH.
Further, the thicknesses of the first heat-insulating layer 1, the first heat-conducting layer 2, the heat-absorbing layer 3, the second heat-conducting layer 4 and the second heat-insulating layer 5 are respectively 4-6mm, 0.5-1.5mm, 5-7mm, 0.5-1.5mm and 4-6 mm. This application can increase the number of piles and the individual layer thickness of each layer structure according to actual need, reaches the effect of ideal, and this application does not do specific restriction to the thickness on each layer.
In another aspect, the present invention provides a generator with an infrared stealth coating, as shown in fig. 2, including a housing 6, a heat source 7, and the foregoing infrared stealth coating structure, where the infrared stealth coating structure is disposed outside the heat source, and the infrared stealth coating is disposed on an inner wall of the housing. Optionally, in this embodiment, the first thermal insulation layer 1 of the infrared stealth coating structure is adhered to the equipment structure housing 6, and the housing may be made of a metal or nonmetal structural material according to the requirement of mechanical strength. The second insulating layer 5 is adjacent to the heat generating source 7, and may or may not be in direct contact.
Optionally, the outermost shell 6 of the generator set in this embodiment is made of carbon fiber with low infrared radiation characteristic, and is sprayed with camouflage ink. The carbon fiber is light in weight, high in strength and good in toughness, and is suitable for being used as a unit shell to meet the environment and service adaptability of the unit such as transportation, impact resistance and the like.
For a 700w portable generator, in this embodiment, the thicknesses of the first heat insulation layer 1, the first heat conduction layer 2, the heat absorption layer 3, the second heat conduction layer 4, and the second heat insulation layer 5 are respectively selected as follows: 5mm, 1mm, 6mm, 1mm, 5mm, can reach following infrared stealthy performance: the difference between the average radiation temperature of the visible surface of the unit and the average radiation temperature of the dominant background is less than or equal to 5 ℃; the difference between the maximum radiation temperature of the visible surface of the unit and the average radiation temperature of the dominant background is less than or equal to 11 ℃; the radiation temperature of the unit exhaust and smoke exhaust to surrounding ground objects rises to be less than 7 ℃; and the sound insulation noise is less than or equal to 75 dB.
In addition, the infrared stealth coatings of the present application may also be applied to armored vehicles and the like having an internal heat source.
The utility model has the advantages and positive effects that: the utility model provides an infrared stealth coating structure, which comprises a first heat-insulating layer, a first heat-conducting layer, a heat-absorbing layer, a second heat-conducting layer and a second heat-insulating layer which are arranged from outside to inside in sequence, wherein the heat-absorbing layer can reduce the thermal infrared characteristics of a covered object and realize self-adaptation to the environmental infrared radiation characteristics, thereby realizing infrared stealth; the first heat insulation layer and the second heat insulation layer can realize heat insulation and sound insulation; the first heat conduction layer and the second heat conduction layer can transfer heat to the whole heat conduction layer, so that the heat is uniformly distributed, the first heat conduction layer and the second heat conduction layer are fully contacted with the heat absorption layer, the heat absorption layer can uniformly absorb and release the heat, and the occurrence of hot spots is avoided to the maximum extent; the utility model discloses it is effectual to give sound insulation and thermal-insulated and infrared stealthy, light in weight, small. The utility model provides a generator with infrared stealthy coating can reduce the hot infrared characteristic of generator, wholly reduces the interior temperature of generator storehouse.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.
Claims (7)
1. An infrared stealth coating structure is characterized in that: the heat-absorbing layer is made of hydrogel phase-change composite materials, the first heat-insulating layer and the second heat-insulating layer are made of aerogel or composite aerogel materials, and the first heat-conducting layer and the second heat-conducting layer are made of metal-based composite materials for heat management.
2. The infrared stealth coating structure of claim 1, wherein: the first heat conduction layer and the second heat conduction layer are made of aluminum matrix composite materials, copper matrix composite materials or magnesium matrix composite materials.
3. The infrared stealth coating structure of claim 1, wherein: the first heat-insulating layer and the second heat-insulating layer are made of silicon-based aerogel materials.
4. The infrared stealth coating structure of claim 1, wherein: the thicknesses of the first heat-insulating layer, the first heat-conducting layer, the heat-absorbing layer, the second heat-conducting layer and the second heat-insulating layer are respectively 4-6mm, 0.5-1.5mm, 5-7mm, 0.5-1.5mm and 4-6 mm.
5. The infrared stealth coating structure of claim 4, wherein: the thicknesses of the first heat-insulating layer, the first heat-conducting layer, the heat-absorbing layer, the second heat-conducting layer and the second heat-insulating layer are respectively 5mm, 1mm, 6mm, 1mm and 5 mm.
6. A generator with infrared stealth coating, its characterized in that: comprising a housing, a heat-generating source and an IR stealth coating structure according to any one of claims 1-5, the IR stealth coating structure being provided outside the heat-generating source, the IR stealth coating being provided on an inner wall of the housing.
7. The generator with infrared stealth coating of claim 6, characterized in that: the shell is made of carbon fiber materials.
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| CN201922402161.4U CN211688885U (en) | 2019-12-27 | 2019-12-27 | Infrared stealthy coating structure and have its generator |
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| CN201922402161.4U CN211688885U (en) | 2019-12-27 | 2019-12-27 | Infrared stealthy coating structure and have its generator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112874023A (en) * | 2020-11-27 | 2021-06-01 | 南京航空航天大学 | Heat-insulation, heat-preservation, sound-insulation and noise-reduction integrated material and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112874023A (en) * | 2020-11-27 | 2021-06-01 | 南京航空航天大学 | Heat-insulation, heat-preservation, sound-insulation and noise-reduction integrated material and preparation method thereof |
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