CN216049450U - Multilayer composite structure bulletproof armor for helicopter cockpit - Google Patents
Multilayer composite structure bulletproof armor for helicopter cockpit Download PDFInfo
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- CN216049450U CN216049450U CN202122475621.3U CN202122475621U CN216049450U CN 216049450 U CN216049450 U CN 216049450U CN 202122475621 U CN202122475621 U CN 202122475621U CN 216049450 U CN216049450 U CN 216049450U
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Abstract
The utility model provides a multilayer composite structure bulletproof armor for a helicopter cockpit, which comprises an outer protective layer and an inner core completely wrapped by the outer protective layer, wherein the inner core comprises a crack stop layer, a bomb breaking layer, a transition layer, a reinforcing layer and a damage reduction layer which are sequentially stacked, the bomb breaking layer is a special ceramic material with the outer surface coated with a high-performance fiber material, all the materials of the inner core are tightly adhered by an adhesive, and the surface density of the bulletproof armor is not more than 43kg/m2. The bulletproof armor is prepared by adopting a structure that the outer protective layer completely wraps the inner core, the inner core is sealed and protected, the service life of the bulletproof armor is prolonged, and the bulletproof armor is manufactured by the aid of the crack-stop layer, the bullet-breaking layer and the transition layerCross layer, enhancement layer and subtract and hinder the layer and pile up in proper order and constitute the inner core through bonding, have the surface density low, light in weight, simple to operate, and the advantage that the bulletproof performance is stable effectively blocks 54 formulas 12.7mm armour piercing firing bullet of high-beam machine rifle percussion for the helicopter cockpit installs protective armor additional.
Description
Technical Field
The utility model belongs to the technical field of bulletproof armors for helicopters, and particularly relates to a multilayer composite structure bulletproof armor for a helicopter cockpit.
Background
Armor is an important measure for effectively preserving oneself and powerfully striking the other party in modern war, for example, in the 20 th century 80 th era, all countries of armed helicopters widely adopt protection designs such as anti-falling property, bulletproof property and the like, and protection armor is additionally arranged, so that battlefield viability is greatly improved. Along with the continuous development and improvement of scientific technology and weaponry, wars put more and more rigorous requirements on the performances of maneuvering, protection, firepower and the like of equipment such as tank armored vehicles, military aircraft and the like, and the traditional metal material is difficult to meet the requirements on the performances of all aspects of the traditional metal material. Therefore, the contradiction between the impact resistance and the quality of the armor is a main problem to be solved by armor protection research.
The primary ceramic composite armor was primarily a double layer armor system that utilized a hard ceramic face plate to break up or passivate the projectiles and a ductile backing plate to deform to absorb the residual kinetic energy of the projectiles and the face plate fragments to effectively resist projectile penetration. However, the elastic modulus, hardness, density and the like between the ceramic and the metal have step changes, which easily causes interlayer acoustic resistance mismatch and stress concentration, and greatly limits the multiple-strike resistance of the composite target plate.
The most serious and common threat to helicopters performing low-altitude attack missions (200 feet altitude, 587-870 ft/s airspeed) is the armor piercing projectile of the 12.7mm high-fire gun. In order to enhance the safety of helicopters and personnel equipment in helicopters, bulletproof armors need to be additionally arranged on the helicopters, so that the battlefield viability of the helicopters can be greatly improved, but the protection of the helicopters in the prior art is heavier than light weight. The armoring index of our land navigation for the cockpit of the helicopter in active service has the requirement of medium missile back convexity and also has the requirement of surface density. Therefore, how to solve the contradiction between the impact resistance and the quality of the armor becomes one of the first problems to be solved by armor protection research.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the present invention is to provide a multilayer composite structure bulletproof armor for a helicopter cockpit, which is used for overcoming the defects of the prior art. This bulletproof armor adopts the structure that outer protective layer wraps up the inner core completely, seals the protection to the inner core, has prolonged bulletproof armor's life, stacks gradually and constitutes the inner core through bonding through layer, the layer of breaing a bullet, transition layer, enhancement layer and the layer of reducing the wound, has the surface density low, light in weight, simple to operate, and the advantage that the bulletproof performance is stable effectively blocks 54 formulas 12.7mm of high-speed projectile rifle percussion and wears first burning bullet for the helicopter cockpit installs protection armor additional
In order to solve the technical problems, the utility model adopts the technical scheme that: the multilayer composite structure bulletproof armor for the helicopter cockpit is characterized by comprising an outer protective layer and an inner core completely wrapped by the outer protective layer, wherein the inner core comprises a crack stop layer, a bullet breaking layer, a transition layer, a reinforcing layer and a wound reducing layer which are sequentially stacked, the bullet breaking layer is a special ceramic material with the outer surface coated with a high-performance fiber material, materials of each layer of the inner core are tightly adhered by an adhesive, and the surface density of the bulletproof armor is not more than 43kg/m2。
The multilayer composite structure bulletproof armor for the helicopter cockpit is characterized in that the outer protective layer is obtained by spraying a polyurea material on the outer surface of the inner core, the polyurea material is an explosion-proof polyurea material, and the explosion-proof polyurea material is generated by reacting an isocyanate component and an amino compound component.
The multilayer composite structure bulletproof armor for the helicopter cockpit is characterized in that the crack stopping layer is made of aramid fiber materials.
The multilayer composite structure bulletproof armor for the helicopter cockpit is characterized in that the high-performance fiber material is a high-performance fiber reinforced resin matrix composite material, and the special ceramic material is a hot-pressed sintered boron carbide ceramic material.
The multilayer composite structure bulletproof armor for the helicopter cockpit is characterized in that the transition layer is made of aramid fiber or carbon fiber reinforced resin matrix composite material.
The multilayer composite structure bulletproof armor for the helicopter cockpit is characterized in that the reinforcing layer is made of special metal bulletproof materials.
The multilayer composite structure bulletproof armor for the helicopter cockpit is characterized in that the injury reduction layer is made of an ultrahigh molecular weight polyethylene fiber material.
The multilayer composite structure bulletproof armor for the helicopter cockpit is characterized in that the adhesive is an aviation structural adhesive.
Compared with the prior art, the utility model has the following advantages:
1. the bulletproof armor is prepared by adopting a structure that the outer protective layer completely wraps the inner core, the inner core is sealed and protected, the inner core is prevented from being eroded by environments such as sunlight, humidity and the like, the service life of the bulletproof armor is prolonged, the inner core is formed by sequentially stacking the crack stop layer, the bullet breaking layer, the transition layer, the reinforcing layer and the injury reduction layer and bonding the crack stop layer, the bullet breaking layer, the transition layer, the reinforcing layer and the injury reduction layer, the bulletproof armor has the advantages of low surface density, light weight, convenience in installation and stable bulletproof performance, can effectively block 54-type 12.7mm armor-penetrating combustion bullets fired by a high-ray machine gun, and is used for additionally installing the bulletproof armor in a helicopter cockpit.
2. According to the utility model, the brittle ceramic material is bound by the high-performance fiber, so that the impact surface of the ceramic plate is properly inhibited, the impact resistance efficiency of the ceramic is improved, and the protection coefficient of the ceramic armor is increased by more than 16-20%.
3. The bulletproof armor is of a gradient armor structure, has the excellent performance of penetration resistance of ceramic materials and the good toughness of metal materials, obviously improves the multiple-strike resistance of the composite armor, reduces the damage of shock waves to the composite armor plate by the design of a gradient form and an interface, and effectively improves the bulletproof performance of the armor.
4. The components of the bulletproof armor comprise low-density ceramics, light alloy, ultrahigh molecular weight polyethylene fiber with low density and the like, so that the light weight of the armor material is easy to realize, and a foundation is laid for the light weight of the armor material.
5. The bulletproof armor has a simple structure and reasonable design, and has the advantages that the ceramic material with high hardness and high strength is used as the face plate, the metal material with good plasticity and high tensile strength is used as the reinforcing plate, the high-performance fiber composite material is used for transition in the middle, and the ultrahigh molecular weight polyethylene fiber material is used as the back plate for reducing damage and buffering, so that the bulletproof armor has the excellent anti-penetration performance of the ceramic material with high hardness and high strength, has the good toughness of the metal material with good plasticity and high tensile strength, and can remarkably improve the protection capability of the armor.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic structural view of a multilayer composite structural ballistic armor of the present invention.
Fig. 2 is an enlarged view of fig. 1 at a.
Fig. 3 is a schematic structural diagram of a bulletproof layer of a multilayer composite structure bulletproof armor of the utility model.
Description of reference numerals:
1-an outer protective layer; 2, inner core; 2-1-a crack stop layer;
2-a bursting layer; 2-2-1-high performance fiber material; 2-2-2-a special ceramic material;
2-3-a transition layer; 2-4-enhancement layer; 2-5-injury reduction layer.
Detailed Description
As shown in fig. 1, 2 and 3, the multilayer composite structure bulletproof armor of the utility model comprises an outer protective layer 1 and an inner core 2 completely wrapped by the outer protective layer 1, wherein the inner core 2 comprises a crack stop layer 2-1, a bomb breaking layer 2-2, a transition layer 2-3, a reinforcing layer 2-4 and a damage reduction layer 2-5 which are sequentially stacked, the bomb breaking layer 2-2 is a special ceramic material 2-2-2 with the outer surface coated with a high-performance fiber material 2-2-1, and the inner core 2 is made of a special ceramic material 2-2The materials of each layer are closely adhered by adhesive, and the surface density of the bulletproof armor is not more than 43kg/m2。
The bulletproof armor is prepared by adopting a structure of the inner core 2 completely wrapped by the outer protection layer 1, and the inner core 2 is protected in a closed manner by arranging the outer protection layer 1, so that the inner core 2 is protected from being corroded by the environment, the bulletproof armor is not easy to damage and is more wear-resistant in the use process, and the service life of a product is greatly prolonged; the fracture-stop layer 2-1 is arranged to restrain the fracture-elastic layer 2-2, so that fragments of the ceramic material of the fracture-elastic layer 2-2 are prevented from splashing after being impacted by the shot, the projectile is crushed by the projectile breaking layer 2-2 when the projectile collides with the projectile so as to reduce and dissipate the armor piercing capability of the projectile, the elastic breaking layer 2-2 is composed of a special ceramic material 2-2-2 with the outer surface coated with a high-performance fiber material 2-2-1, the brittle ceramic is bound through the fiber, not only the impact surface of the ceramic is properly inhibited, simultaneously improves the shock resistance efficiency of the ceramic, increases the protection coefficient of the multilayer composite structure bulletproof armor by more than 16 to 20 percent, the transition layer 2-3 plays a role in starting and stopping, and the bomb-breaking layer 2-2 and the enhancement layer 2-4 made of different materials are connected together; the enhancement layer 2-4 is arranged between the transition layer 2-3 and the damage reduction layer 2-5, so that the damage reduction layer 2-5 effectively supports the bomb layer 2-2, the fracture time of ceramics in the bomb layer 2-2 is delayed, the bulletproof capability of the armor is effectively improved, the residual kinetic energy of the projectile after the projectile passes through the outer fiber composite layer can be consumed through the damage reduction layer 2-5, and meanwhile, the fragments of the projectile are prevented from splashing.
The bursting layer 2-2 is a special ceramic material 2-2-2 covering the high-performance fiber material 2-2-1, wherein the density of the special ceramic material 2-2-2 is 2.50 +/-0.05 g/cm3The Vickers hardness is not less than 30GPa, the bending strength is not less than 400MPa, and the thickness is 13-15 mm; the strength of the high-performance fiber material 2-2-1 is 3000-5000 Mpa, and the gel content is not more than 40%.
As shown in fig. 1 and 2, it is noted that the crack stop layer 2-1 of the multilayer composite bulletproof armor faces the direction of impact.
In the utility model, the outer protection layer 1 is obtained by spraying a polyurea material on the outer surface of the inner core 2, the polyurea material is an explosion-proof polyurea material, and the explosion-proof polyurea material is generated by reacting an isocyanate component and an amino compound component. By adopting polyurea material as the outer protective layer 1, a waterproof, ultraviolet-proof, corrosion-resistant and oxidation-resistant closed protective layer is formed outside the armor, the impact resistance is not less than 40cm, and the flame retardant property afterflame time is not more than 2 s.
The explosion-proof polyurea material used in the present invention is the explosion-proof polyurea material described in publication No. CN 110229305a, the isocyanate component used is the a component described in publication No. CN 110229305a, and the amino compound component used is the B component described in publication No. CN 110229305a, and the explosion-proof polyurea material is prepared from the a component and the B component.
In the utility model, the crack-stopping layer 2-1 is made of aramid fiber material. The anti-ballistic aramid fiber material is adhered to and covers the outer surface of the anti-ballistic layer 2-2 to restrain the anti-ballistic layer 2-2, and the woven fabric of the high-performance aramid fiber III is used as the aramid fiber material, so that the anti-ballistic performance is improved by nearly 30% compared with that of aramid fiber II, the anti-ballistic aramid fiber material has higher tensile strength and elongation at break, and the areal density of the anti-ballistic aramid fiber material is 150-250 g/m2The strength of the warp direction and the weft direction is not less than 10KN, and the elongation at break is not less than 6%.
In the utility model, the high-performance fiber material 2-2-1 is a high-performance fiber reinforced resin matrix composite material, and the special ceramic material 2-2-2 is a boron carbide ceramic material formed by hot-pressing sintering. The high-performance fiber reinforced resin matrix composite material has the characteristics of high strength, high temperature resistance and excellent thermal shock resistance, so that the shell breaking layer 2-2 can block high temperature generated by armor piercing combustion shells, and the boron carbide ceramic material formed by hot-pressing sintering has the characteristics of low density, high hardness and good impact resistance.
In the utility model, the transition layers 2-3 are aramid fiber or carbon fiber reinforced resin matrix composite materials. The aramid fiber or carbon fiber reinforced resin-based composite material has a good buffering effect between two different hard materials, namely ceramic and a metal plate, can also slow down backward splashing of pills and ceramic fragments, and has the surface density of 400-700 g/m2。
In the utility model, the reinforced layers 2-4 are special metal bulletproof materials. By adopting the special titanium alloy bulletproof material as the reinforcing layer 2-4, the type number is TC4, the thickness is 1.0-1.5 mm, the strength is 1100-1300 MPa, the elongation is 10% -11%, and the special titanium alloy bulletproof material has the characteristics of small density, high hardness and good bullet impact resistance.
In the utility model, the damage reduction layers 2-5 are made of ultra-high molecular weight polyethylene fiber materials. By adopting the ultra-high molecular weight polyethylene fiber material laminated board as the damage reducing layer 2-5, the residual kinetic energy of the projectile after passing through the outer layer fiber composite layer can be consumed through the integral deformation of the fiber layer, meanwhile, the splashing of projectile fragments is also prevented, the ultra-high molecular weight polyethylene fiber material has the advantages of small density, tensile strength, impact resistance and specific energy absorption capacity which are nearly 1 time higher than those of the aramid fiber, and the surface density is 12kg/m2～15kg/m2And V50 is not less than 1000 m/s.
In the present invention, the adhesive is an aircraft structural adhesive. The structural adhesive for aviation consists of the modified epoxy resin and the polyamide in the mass ratio of 4:1, has high-strength adhesive force, can ensure that the interfaces of materials such as ceramics and the like are not easy to crack when the bulletproof armor is impacted by bullet, reduces the destructive effect generated by shock waves, and has the adhesive strength not less than 15N.
The multilayer composite structure bulletproof armor of the utility model has the following manufacturing steps:
preparing boron carbide powder into a special ceramic material 2-2-2, and coating a high-performance fiber reinforced resin matrix composite material 2-2-1 outside the special ceramic material to prepare a bursting layer 2-2;
step two, preparing the ultra-high molecular weight polyethylene fiber material into a damage reduction layer 2-5;
step three, manufacturing the TC4 titanium alloy plate into a reinforced layer 2-4;
step four, coating phenolic resin on aramid fiber cloth in a scraping mode to prepare a transition layer 2-3;
fifthly, preparing aramid fiber woven fabric into a crack stop layer 2-1;
step six, mixing the modified epoxy resin and the polyamide into the structural adhesive for aviation according to the mass ratio of 4: 1;
seventhly, sequentially stacking and arranging the crack stop layer 2-1, the bomb breaking layer 2-2, the transition layer 2-3, the reinforcing layer 2-4 and the damage reduction layer 2-5, and bonding the layers by using a structural adhesive for aviation to obtain an inner core 2;
and step eight, uniformly spraying the double-component 1401 polyurea explosion-proof material on the periphery of the inner core 2 to form an outer protection layer 1, so as to obtain the multilayer composite structure bulletproof armor.
The detection proves that the areal density of the multilayer composite structure bulletproof armor is not more than 43kg/m2Can prevent 54-type 12.7mm armor-piercing combustion bombs.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any simple modifications, alterations and equivalent changes made to the above embodiments according to the technical essence of the present invention are still within the scope of the technical solution of the present invention.
Claims (8)
1. The multilayer composite structure bulletproof armor for the cockpit of the helicopter is characterized by comprising an outer protective layer (1) and an inner core (2) completely wrapped by the outer protective layer (1), wherein the inner core (2) comprises a crack-stopping layer (2-1), a bomb-breaking layer (2-2), a transition layer (2-3), a reinforcing layer (2-4) and a damage-reducing layer (2-5) which are sequentially stacked, the bomb-breaking layer (2-2) is a special ceramic material (2-2-2) with the outer surface coated with a high-performance fiber material (2-2-1), materials of each layer of the inner core (2) are tightly adhered by an adhesive, and the surface density of the bulletproof armor is not more than 43kg/m2。
2. The multilayer composite structural ballistic armor for helicopter cockpit according to claim 1 characterized in that said outer protective layer (1) is obtained by spraying a polyurea material on the outer surface of the inner core (2), said polyurea material being an explosion-proof polyurea material.
3. Multilayer composite structural ballistic armor for helicopter cockpit according to claim 1 characterized in that said crack stop layer (2-1) is of aramid fiber material.
4. The multilayer composite structure bulletproof armor for the helicopter cockpit of claim 1, characterized in that the high performance fiber material (2-2-1) is a high performance fiber reinforced resin based composite material and the special ceramic material (2-2-2) is a hot pressed sintered boron carbide ceramic material.
5. Multilayer composite structural ballistic armor for helicopter cockpit according to claim 1 characterized in that said transition layers (2-3) are aramid or carbon fiber reinforced resin based composite material.
6. Multilayer composite structural ballistic armor for helicopter cockpit according to claim 1 characterized in that said reinforcement layers (2-4) are of special metal ballistic material.
7. Multilayer composite structural ballistic armor for helicopter cockpit according to claim 1 characterized in that said damage reduction layers (2-5) are of ultra high molecular weight polyethylene fiber material.
8. The multilayer composite structural ballistic armor for helicopter cabs according to claim 1 wherein said adhesive is an aerospace structural adhesive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122475621.3U CN216049450U (en) | 2021-10-14 | 2021-10-14 | Multilayer composite structure bulletproof armor for helicopter cockpit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122475621.3U CN216049450U (en) | 2021-10-14 | 2021-10-14 | Multilayer composite structure bulletproof armor for helicopter cockpit |
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| Publication Number | Publication Date |
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| CN216049450U true CN216049450U (en) | 2022-03-15 |
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| CN202122475621.3U Active CN216049450U (en) | 2021-10-14 | 2021-10-14 | Multilayer composite structure bulletproof armor for helicopter cockpit |
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- 2021-10-14 CN CN202122475621.3U patent/CN216049450U/en active Active
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