Stamping Initiation Enhanced Active Fragment

Abstract

The present invention provides a stamping-initiated enhanced active fragment, which comprises a fragment end cap, a fragment housing, an energy-absorbing liner, an active material, a hot spot distribution network structure, and a three-way sensing structure; the fragment housing has a receiving space, and the energy-absorbing liner is installed at the bottom of the receiving space; the active material, the hot spot distribution network structure, and the three-way sensing structure are all installed in the receiving space; the fragment end cap covers the fragment housing. By using the impact of the fragment on the target as the input energy, the generated shock wave is transmitted into the three-way sensing structure. The ferroelectric ceramics in the three-way sensing structure are stimulated to generate a high-voltage current, which is transmitted into the conductive network structure through the conductive circuit. The hot spots in the conductive network structure are stimulated to rapidly and sharply increase the temperature to generate heat, and the active material generates an explosion effect under the simultaneous activation of the impact and the hot spots, thereby helping to improve the penetration and damage ability of the fragment.

Description

Technical Field

[0001] The present invention relates to the field of damage of fragmentation warheads, and specifically, to a stamping-initiated enhanced active fragment. Background Art

[0002] Fragments are the basic damage units of high-explosive fragmentation warheads and are widely used in air defense and anti-missile weapons. The high-explosive fragmentation warhead detonates explosives to push the fragments to fly in all directions, and the fragments rely on kinetic energy to penetrate and kill the target. As a killing element, the characteristic parameters of fragments include the number of fragments, the initial velocity of fragments, the mass distribution of fragments, and the spatial distribution of fragments. The magnitude of the kinetic energy when the fragment hits the target is one of the important scales to measure the killing power of the fragment. Traditional damage elements are restricted by the single kinetic energy penetration mechanism and are limited in improving the damage efficiency, while active damage elements can break through this limitation and are expected to achieve more efficient damage efficiency. During the ultra-high-speed impact process, in addition to relying on its own kinetic energy to penetrate and damage the target, the active material also undergoes a chemical reaction and releases energy under the strong impact, that is, the deflagration / explosion phenomenon appears, thereby enhancing the damage ability to the target.

[0003] The active damage element is an advanced and efficient damage technology focusing on the damage mechanism and design concept of the warhead, is one of the most valuable application directions of the active material, and is also an important way to significantly improve the damage power of high-explosive fragmentation bombs, rod projectiles or armor-piercing / semi-armor-piercing ammunition. Through the coupling of damage mechanisms such as "kinetic energy penetration" and "strong implosion", high-lethality "structural disintegration damage" to the target is achieved, thereby greatly even leapfrogging the power of the warhead of conventional hard damage ammunition.

[0004] In the prior art, the active fragment damage element relies on hitting the target to stimulate the active material inside the fragment to cause "strong implosion", but there will still be situations where the active material inside the fragment is not stimulated or is not fully stimulated due to insufficient impact kinetic energy of the fragment, poor impact attitude, etc., resulting in insufficient implosion power of the active damage element and being unable to effectively destroy the target, unable to meet the requirements of efficient damage. Therefore, how to improve the structure of the existing active fragment damage element, increase the excitation degree of the active material inside the damage element when interacting with the target and apply it to live ammunition is a problem that needs to be solved.

[0005] Patent document CN111646872A discloses a new type of active fragment of a warhead, its preparation method and application, specifically a hydride active fragment with better stability during storage, encapsulated by a pipe with a grid inner wall. This invention uses a pipe with a grid inner wall to encapsulate the hydride and the oxidant into different unit cells of the pipe respectively, achieving the purpose of improving the processing and storage stability of the hydride active fragment without affecting the damage effect of the fragment. However, this invention still only relies on the mechanical energy of impact to stimulate the active material, and there are still problems that the active material in the fragment is not stimulated or incompletely stimulated when the impact kinetic energy of the fragment is insufficient or the impact posture is poor. Summary of the Invention

[0006] Aiming at the defects in the prior art, the purpose of the present invention is to provide a stamping-initiated enhanced active fragment.

[0007] A stamping-initiated enhanced active fragment provided by the present invention includes a fragment end cap, a fragment housing, an energy-absorbing gasket, an active material, a hot spot distribution network structure, and a three-way sensing structure;

[0008] The fragment housing has an accommodation space, and the energy-absorbing gasket is installed at the bottom of the accommodation space;

[0009] The active material, the hot spot distribution network structure, and the three-way sensing structure are all installed in the accommodation space; and the bottom end of the active material is in close contact with the energy-absorbing gasket;

[0010] The fragment end cap covers the fragment housing.

[0011] Preferably, the top surface of the three-way sensing structure is in close contact with the fragment end cap, the bottom surface is in close contact with the energy-absorbing gasket, and the side surface is in close contact with the active material;

[0012] The three-way sensing structure includes an insulating interlayer, a conductive circuit, and a plurality of ferroelectric ceramics;

[0013] The plurality of ferroelectric ceramics are connected to each other and to the hot spot distribution network structure through the conductive circuit;

[0014] Insulating interlayers are provided between different ferroelectric ceramics and between the ferroelectric ceramics and the hot spot distribution network structure.

[0015] Preferably, the hot spot distribution network includes a conductive network structure and hot spots;

[0016] The hot spots are distributed on the conductive network structure, and the conductive network structure is placed inside the active material.

[0017] Preferably, the conductive circuit has a first external connection point, and the conductive network structure has a second external connection point;

[0018] The hot spot distribution network and the three-way sensing structure are connected through the first external circuit point and the second external circuit point to form a path.

[0019] Preferably, the number of ferroelectric ceramics is 3, namely the first ferroelectric ceramic, the second ferroelectric ceramic and the third ferroelectric ceramic;

[0020] The first ferroelectric ceramic and the second ferroelectric ceramic are arranged in parallel, and the third ferroelectric ceramic is arranged below the first ferroelectric ceramic and the second ferroelectric ceramic;

[0021] The first ferroelectric ceramic is used to sense the impact in the up and down direction, the second ferroelectric ceramic is used to sense the impact in the front and back direction, and the third ferroelectric ceramic is used to sense the impact in the left and right direction; the ferroelectric ceramic can generate high-voltage current after being stimulated.

[0022] Preferably, the polarization direction of the first ferroelectric ceramic is in the left and right direction or the front and back direction, the polarization direction of the second ferroelectric ceramic is in the left and right direction or the up and down direction, the polarization direction of the third ferroelectric ceramic is in the up and down direction or the front and back direction, and the shock wave sensing direction is perpendicular to the ceramic polarization direction.

[0023] Preferably, the energy-absorbing gasket is made of PC, PU, TPU, rubber or nylon material.

[0024] Preferably, the fragment end cap and the fragment housing are made of tungsten alloy or steel, amorphous alloy or high-entropy alloy material.

[0025] Preferably, the active material is made of Al, Ni, Mg, Zr, PTFE material, or a mixture and compound of these materials.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The present invention uses the impact between the fragment and the target as the input energy, and the generated shock wave is transmitted into the three-way sensing structure. The ferroelectric ceramics in the three-way sensing structure are stimulated to generate high-voltage current, which is transmitted into the conductive network structure through the conductive circuit. The hot spots in the conductive network structure are stimulated to rapidly and sharply increase the temperature to generate heat, and the active material generates an explosion effect under the simultaneous activation of the impact and the hot spots, thereby helping to improve the penetration and damage ability of the fragment.

[0028] 2. The ferroelectric ceramics in the three-way sensing structure of the present invention can comprehensively sense the impact between the fragment and the target, thereby accurately and quickly exciting the hot spot distribution network, and then exciting the active material. Even when the mechanical impact energy is insufficient, the energy of the active material can be fully excited, which helps to improve the excitation efficiency of the active material. Brief Description of the Drawings

[0029] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non - limiting embodiments read in conjunction with the accompanying drawings:

[0030] Figure 1 This is a sectional view mainly showing the enhanced active fragments of the stamping initiation along the central axis direction of the present invention;

[0031] Figure 2 This is a three - dimensional structure diagram mainly showing the three - way sensing structure of the present invention;

[0032] Figure 3 This is a three - dimensional structure diagram mainly showing the hot - spot distribution network of the present invention.

[0033] As shown in the figure:

[0034]

[0035] Detailed implementation manners

[0036] The present invention will be described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several changes and improvements can still be made. These all fall within the protection scope of the present invention.

[0037] The present invention provides a stamping - initiated enhanced active fragment, including a fragment end - cap 1, a fragment housing 2, an energy - absorbing gasket 3, an active material 4, a hot - spot distribution network structure, and a three - way sensing structure; the fragment housing 2 has a receiving space, and the energy - absorbing gasket 3 is installed at the bottom of the receiving space. Specifically, the bottom surface of the energy - absorbing gasket 3 is attached to the bottom end surface inside the housing 2, and the side surface of the energy - absorbing gasket 3 is attached to the side surface inside the housing 2. The energy - absorbing gasket 3 can absorb the shock wave acting on the fragment when the warhead detonates, preventing the premature triggering of the three - way sensing structure. The active material 4, the hot - spot distribution network structure, and the three - way sensing structure are all installed in the receiving space; and the bottom end of the active material 4 is in close contact with the energy - absorbing gasket 3; the fragment end - cap 1 covers the fragment housing 2. Preferably, the fragment end - cap 1 and the fragment housing 2 are coaxially connected by threads or adhesives, and their outer diameters are the same.

[0038] The top surface of the three-way sensing structure is in close contact with the fragment end cap 1, the bottom surface is in close contact with the energy-absorbing gasket 3, and the side surface is in close contact with the active material 4; the three-way sensing structure includes an insulating interlayer 6, a conductive circuit 7, and a plurality of ferroelectric ceramics 5; the plurality of ferroelectric ceramics 5 are connected to each other and to the hot spot distribution network structure through the conductive circuit 7; the insulating interlayer 6 is provided between different ferroelectric ceramics 5 and between the ferroelectric ceramics 5 and the hot spot distribution network structure.

[0039] The hot spot distribution network includes a conductive network structure 8 and hot spots 9; the hot spots 9 are distributed on the conductive network structure 8, and the conductive network structure 8 is placed inside the active material 4.

[0040] The conductive circuit 7 has a first external connection point, and the conductive network structure 8 has a second external connection point 81; preferably, the number of the first external connection point and the second external connection point 81 is 2 each.

[0041] The hot spot distribution network and the three-way sensing structure are connected through the first external connection point and the second external connection point 81 to form a path.

[0042] The number of the ferroelectric ceramics 5 is 3, namely a first ferroelectric ceramic 51, a second ferroelectric ceramic 52, and a third ferroelectric ceramic 53; the first ferroelectric ceramic 51 and the second ferroelectric ceramic 52 are arranged in parallel with each other, and the third ferroelectric ceramic 53 is arranged below the first ferroelectric ceramic 51 and the second ferroelectric ceramic 52; the first ferroelectric ceramic 51 is used to sense the impact in the up-down direction, the second ferroelectric ceramic 52 is used to sense the impact in the front-back direction, and the third ferroelectric ceramic 53 is used to sense the impact in the left-right direction; the ferroelectric ceramics 5 can generate high-voltage current after being stimulated. The design with 3 ferroelectric ceramics 5 can sense the impact of the fragment on the target in all directions, so as to accurately and quickly activate the hot spot distribution network, and then activate the active material 4, and can fully activate the energy of the active material even when the mechanical impact energy is insufficient, which helps to improve the activation efficiency of the active material. The first ferroelectric ceramic 51, the second ferroelectric ceramic 52, and the third ferroelectric ceramic 53 play the role of sensing different impacts through different ceramic polarization directions. Preferably, the ceramic polarization direction of the first ferroelectric ceramic 51 is in the left-right direction or the front-back direction, the ceramic polarization direction of the second ferroelectric ceramic 52 is in the left-right direction or the up-down direction, the ceramic polarization direction of the third ferroelectric ceramic 53 is in the up-down direction or the front-back direction, and the shock wave sensing direction is perpendicular to the ceramic polarization direction.

[0043] In a preferred example, the energy-absorbing pad 3 is made of a low-modulus material such as PC, PU, TPU, rubber or nylon. The fragment end cap 1 and the fragment housing 2 are made of a high-strength material such as tungsten alloy, steel, amorphous alloy or high-entropy alloy. The active material 4 is made of highly active metals, non-metals such as Al, Ni, Mg, Zr, PTFE or mixtures and compounds of these materials; the ferroelectric ceramic 5 includes PZT95 / 5, PZT52 / 48, PZT65 / 35 with high output energy density, the insulating interlayer 6 is made of a material with good insulation such as polycarbonate, PC, etc., and the conductive circuit 7 is made of a material with good conductivity such as Al, Cu, Ag, etc.; the conductive network structure 8 is made of a material with good conductivity such as Al, Cu, Ag, etc.; the hot spot 9 is made of materials such as bridge wire, metal bridge film, ignition charge, etc.

[0044] The working principle of the present invention is as follows: The present invention uses the impact of the fragment on the target as the input energy, and the generated shock wave is transmitted into the three-way sensing structure. The ferroelectric ceramic in the three-way sensing structure is stimulated to generate a high-voltage current, which is transmitted into the conductive network structure 8 through the conductive circuit 7. The hot spot 9 in the conductive network is stimulated and the temperature rapidly rises sharply to generate heat. The active material 4 is activated by the impact and the hot spot 9 at the same time to produce an explosion effect, which helps to improve the penetration and damage ability of the fragment. Specifically, when the warhead explodes and drives, the energy-absorbing pad 3 absorbs the detonation wave to prevent the three-way sensing structure from being triggered. When the fragment acts on the target, a shock wave is generated, and the shock wave is transmitted into the three-way sensing structure through the fragment end cap 1 and the fragment housing 2. The ferroelectric ceramic 5 in the three-way sensing structure is stimulated to generate a high-voltage current, which is transmitted into the conductive network structure 8 through the conductive circuit 7 distributed in the insulating interlayer 6. The hot spot 9 in the conductive network structure 8 is stimulated and the temperature rapidly rises sharply to generate heat. The active material 4 is activated by the impact and the hot spot 9 at the same time to produce an explosion effect, and has a stronger penetration and damage ability.

[0045] Moreover, the ferroelectric ceramic in the three-way sensing structure of the present invention can comprehensively sense the impact of the fragment on the target, thereby accurately and quickly exciting the hot spot distribution network, and then exciting the active material. Even when the mechanical impact energy is insufficient, the energy of the active material can be fully excited, which helps to improve the excitation efficiency of the active material.

[0046] In addition, the remanent polarization intensity of the ferroelectric ceramic 5 in the three-way sensing structure of the present invention can also control the energy of the output high-voltage pulse current, and then control the heating characteristics of the hot spot 9, and finally control the reaction degree of the active material 4, which helps to improve the controllability of the fragment power.

[0047] In summary, the present invention provides an active fragment damage element structure driven by stamping electromagnetic force, which can effectively improve the excitation degree of the active material inside the damage element when the fragment acts on the target. The present invention makes full use of the shock wave generated when the fragment impacts the target to stimulate the three-way sensing structure to generate pulsed current, which is transmitted to the hot spot distribution network through the conductive lines distributed in the insulating interlayer. Multiple local hot spots are generated in the hot spot distribution network to stimulate the active material to release energy, which helps to improve the energy release efficiency of the active material and thus helps to improve the penetration and damage ability of the fragment. The structure of this device is simple and can be used in various fragment warheads.

[0048] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 should not be construed as a limitation of the present invention.

[0049] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. Without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A stamping-initiated enhanced active fragment, characterized in that, It includes a fragment end cap (1), a fragment housing (2), an energy-absorbing gasket (3), an active material (4), a hot spot distribution network structure, and a three-way sensing structure; The fragment housing (2) has an accommodation space, and the energy-absorbing gasket (3) is installed at the bottom of the accommodation space; The active material (4), the hot spot distribution network structure, and the three-way sensing structure are all installed in the accommodation space; and the bottom end of the active material (4) is in close contact with the energy-absorbing gasket (3); The fragment end cap (1) covers the fragment housing (2); The top surface of the three-way sensing structure is in close contact with the fragment end cap (1), the bottom surface of the three-way sensing structure is in close contact with the energy-absorbing gasket (3), and the side surface is in close contact with the active material (4); The three-way sensing structure includes an insulating interlayer (6), a conductive circuit (7), and a plurality of ferroelectric ceramics (5); The plurality of ferroelectric ceramics (5) are connected to each other and to the hot spot distribution network structure through the conductive circuit (7); An insulating interlayer (6) is provided between different ferroelectric ceramics (5) and between the ferroelectric ceramics (5) and the hot spot distribution network structure.

2. The enhanced active fragment for stamping initiation according to claim 1, wherein The hot spot distribution network includes a conductive network structure (8) and hot spots (9); The hot spots (9) are distributed on the conductive network structure (8), and the conductive network structure (8) is placed inside the active material (4).

3. The enhanced active fragment for stamping initiation according to claim 2, wherein The conductive circuit (7) has a first external connection point, and the conductive network structure (8) has a second external connection point (81); The hot spot distribution network structure and the three-way sensing structure are connected through the first external connection point and the second external connection point (81) to form a circuit.

4. The enhanced active fragment for stamping initiation according to claim 1, wherein The number of ferroelectric ceramics (5) is 3, namely a first ferroelectric ceramic (51), a second ferroelectric ceramic (52), and a third ferroelectric ceramic (53); The first ferroelectric ceramic (51) and the second ferroelectric ceramic (52) are arranged parallel to each other, and the third ferroelectric ceramic (53) is arranged below the first ferroelectric ceramic (51) and the second ferroelectric ceramic (52); The first ferroelectric ceramic (51) is used to sense impacts in the up-down direction, the second ferroelectric ceramic (52) is used to sense impacts in the front-back direction, and the third ferroelectric ceramic (53) is used to sense impacts in the left-right direction; the ferroelectric ceramics (5) can generate high-voltage current after being stimulated.

5. The enhanced active fragment for stamping initiation according to claim 4, characterized in that, The ceramic polarization direction of the first ferroelectric ceramic (51) is in the left-right direction or the front-back direction, the ceramic polarization direction of the second ferroelectric ceramic (52) is in the left-right direction or the up-down direction, the ceramic polarization direction of the third ferroelectric ceramic (53) is in the up-down direction or the front-back direction, and the shock wave sensing direction is perpendicular to the ceramic polarization direction.

6. The enhanced active fragment for stamping initiation according to claim 1, wherein The energy-absorbing gasket (3) is made of PC, PU, TPU, rubber, or nylon material.

7. The enhanced active fragment for stamping initiation according to claim 1, wherein The active material (4) is made of Al, Ni, Mg, Zr, PTFE material, or a mixture of these materials.

8. The enhanced active fragment for stamping initiation according to claim 1, characterized in that, The insulating interlayer (6) is made of polycarbonate or PC material.

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