Passive electromagnetic protection structure

Abstract

The utility model relates to the technical field of armor bulletproof, in particular to a passive electromagnetic protection structure which sequentially comprises high-density fiber cloth, a buffer gel layer, an outer metal layer, a porous ceramic layer, a loose fiber layer and an inner metal layer from outside to inside. The high-density fiber cloth fiber composite material and the buffer gel layer are shear thickening gel, the outer metal layer and the inner metal layer are steel plates or aluminum alloys made of the same material and are connected with a high-power pulse power supply, the porous ceramic layer is porous ceramic, the porosity is 10-40%, and the loose fiber layer is felt. According to the passive electromagnetic protection structure, each layer can exert the independent projectile blocking capacity from outside to inside, and the damage of a single incoming projectile can be greatly reduced by combining the passive electromagnetic protection function, so that the passive electromagnetic protection structure has the capacity of resisting continuous shooting of a plurality of projectiles.

Description

Technical Field

[0001] This utility model relates to the field of armored bulletproof technology, and in particular to a passive electromagnetic protection structure. Background Technology

[0002] With the development of high-tech weaponry, especially precision-guided weapons and advanced reconnaissance and detection systems, and the continuous enhancement of anti-tank munition effectiveness, tanks and vehicles face increasing threats. To counter various large-caliber artillery, anti-tank guided weapons, and a wide variety of powerful anti-tank weapons such as high-speed kinetic energy penetrators, shaped charge anti-tank projectiles, and high-explosive fragmentation projectiles, increasing the thickness of the protective plates in all aspects would lead to a significant increase in the weight of the protection system, thereby reducing its mobility and flexibility. Simply increasing the thickness of the protective structure to enhance armor protection is impractical. Without increasing the weight of the main protective plate, electromagnetic protection structures can significantly improve the protective capabilities of the system. Passive electromagnetic protection structures mainly consist of two metal armor plates spaced a certain distance apart, effectively reducing the penetration capability of metal jets or armor-piercing projectiles into the main armor. Compared with other protection structures, passive electromagnetic protection structures offer better operational safety and reusability.

[0003] However, the existing passive electromagnetic protection structure has the outermost metal plate in direct contact with the incoming projectile. After absorbing the vast majority of the impact from the incoming projectile, it will undergo significant deformation or even be penetrated. Once the metal plate is penetrated, the electromagnetic protection effect will be greatly reduced. The strength of the material itself is insufficient to effectively block the incoming projectile and cannot meet the resistance requirements during continuous firing. Utility Model Content

[0004] To address the problem that existing passive electromagnetic protection structures mounted on armored vehicles cannot withstand continuous fire, this invention provides a passive electromagnetic protection structure, comprising, from the outside in, a high-density fiber cloth, a buffer gel layer, an outer metal layer, a porous ceramic layer, a loose fiber layer, and an inner metal layer. The high-density fiber cloth is a fiber composite material made from one or more of carbon fiber, aramid fiber, and basalt fiber, combined with polyurethane, epoxy resin, polyurea, or polycarbonate through high-temperature roll pressing. The buffer gel layer is a shear-thickening gel. The outer and inner metal layers are made of the same material, steel plates or aluminum alloys, and are connected to a high-power pulse power supply. The porous ceramic layer is a porous ceramic made of zirconium oxide, alumina, or silicon carbide, with a porosity of 10% to 40%. The loose fiber layer is a felt composed of one or more of nylon fiber, polyester fiber, polyacrylonitrile fiber, or polyvinyl chloride fiber.

[0005] This novel passive electromagnetic protection structure incorporates a high-density fiber cloth and a buffer gel layer outside the outer metal layer. The high-density fiber cloth absorbs some of the impact energy from incoming projectiles and converts it into lateral propagation. The shear-thickening colloid in the buffer gel layer gradually thickens outwards around the projectile under the rotational shear force of the incoming projectile, reducing its rotational speed and minimizing damage to the outer metal layer. The porous ceramic layer and loose fiber layer between the outer and inner metal layers possess high penetration resistance, remaining unbroken even under a 10-20kV voltage. Furthermore, the porous ceramic layer absorbs the projectile's kinetic energy, preventing high-energy projectiles from penetrating the outer metal layer and protruding further into the armor plate. The loose fiber layer provides buffering, dissipating accumulated impact force and preventing excessive energy concentration that could deform the armor plate. Each layer of this passive electromagnetic protection structure, from the outside in, provides its own projectile-absorbing capability. Combined with the passive electromagnetic protection function, this significantly reduces the damage from a single incoming projectile, thus providing the ability to withstand continuous fire from multiple projectiles. In addition, when the outer metal layer is penetrated, the gel in the buffer gel layer will seep from the bullet hole into the porous ceramic layer, sealing the bullet hole and the porous ceramic near the bullet hole, thereby increasing the ability of this area to resist secondary shots.

[0006] Specifically, the thickness of the outer metal layer and the inner metal layer is 6~15mm, and the distance between them is 8~12cm; the thickness of the high-density fiber cloth is 0.5~1.5mm, the thickness of the buffer gel layer (2) is 2~6mm; and the thickness ratio of the porous ceramic layer (4) and the loose fiber layer (5) is 1:(0.3~0.7). Attached Figure Description

[0007] Figure 1 This is a cross-sectional schematic diagram of the passive electromagnetic protection structure of this utility model.

[0008] The components are numbered as follows: 1. High-density fiber cloth, 2. Buffer gel layer, 3. Outer metal layer, 4. Porous ceramic layer, 5. Loose fiber layer, 6. Inner metal layer. Detailed Implementation

[0009] The present invention will be described below with reference to examples. The examples are only used to explain the present invention and are not intended to limit the scope of the present invention. Example

[0010] A passive electromagnetic protection structure, such as Figure 1As shown, the passive electromagnetic protection structure consists of, from the outside in, a high-density fiber cloth 1, a buffer gel layer 2, an outer metal layer 3, a porous ceramic layer 4, a loose fiber layer 5, and an inner metal layer 6. The high-density fiber cloth 1 is 1 mm thick and is a composite material made of carbon fiber and epoxy resin through high-temperature roll pressing. The buffer gel layer 2 is 5 mm thick and is made of PVC paste resin. The outer metal layer 3 and the inner metal layer 6 are made of the same 7A05 aluminum alloy and are connected to a high-power pulse power supply. The thickness of both the outer metal layer 3 and the inner metal layer 6 is 10 mm. The porous ceramic layer 4 is 70 mm thick and is made of alumina porous ceramic with a porosity of 30%. The loose fiber layer 5 is 30 mm thick and is made of nylon fiber felt. Example

[0011] A passive electromagnetic protection structure, such as Figure 1 As shown, the passive electromagnetic protection structure consists of, from the outside in, a high-density fiber cloth 1, a buffer gel layer 2, an outer metal layer 3, a porous ceramic layer 4, a loose fiber layer 5, and an inner metal layer 6. The high-density fiber cloth 1 is 0.5 mm thick and is a composite material made of aramid fiber polyurethane through high-temperature roll pressing. The buffer gel layer 2 is 2 mm thick and is made of PVC paste resin. The outer metal layer 3 and the inner metal layer 6 are made of steel plates of the same material and are connected to a high-power pulse power supply. The outer metal layer 3 and the inner metal layer 6 are 6 mm thick. The porous ceramic layer 4 is 60 mm thick and is made of silicon carbide porous ceramic with a porosity of 20%. The loose fiber layer 5 is 20 mm thick and is made of polyacrylonitrile felt.

[0012] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A passive electromagnetic shield structure, characterized by, The passive electromagnetic protection structure consists of, from the outside to the inside, a high-density fiber cloth (1), a buffer gel layer (2), an outer metal layer (3), a porous ceramic layer (4), a loose fiber layer (5), and an inner metal layer (6). The high-density fiber cloth (1) is a fiber composite material made by high-temperature rolling pressing of one or more of carbon fiber, aramid fiber, and basalt fiber with polyurethane, epoxy resin, polyurea or polycarbonate. The buffer gel layer (2) is a shear-thickening gel; The outer metal layer (3) and the inner metal layer (6) are made of the same material, either steel or aluminum alloy, and are connected to a high-power pulse power supply. The porous ceramic layer (4) is a porous ceramic of zirconium oxide, alumina, and silicon carbide, with a porosity of 10% to 40%. The loose fiber layer (5) is a felt composed of one or more of nylon fiber, polyester fiber, polyacrylonitrile fiber or polyvinyl chloride fiber.

2. The passive electromagnetic shield structure of claim 1, wherein, The thickness of the outer metal layer (3) and the inner metal layer (6) is 6~15mm, and the distance between them is 8~12cm.

3. The passive electromagnetic shield structure of claim 2, wherein, The high-density fiber cloth (1) has a thickness of 0.5~1.5mm; the buffer gel layer (2) has a thickness of 2~6mm.

4. The passive electromagnetic shield structure of claim 2, wherein, The thickness ratio of the porous ceramic layer (4) to the loose fiber layer (5) is 1:(0.3~0.7).

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