A passive strong magnetic field coupled shaped charge device

Abstract

The present invention relates to a passive strong magnetic field coupled shaped charge device; comprising an initiation system, a charge structure, a charge liner, a composite piezoelectric shell, a solenoid, and a modulation circuit. The passive strong magnetic field coupled shaped charge device provided by the present invention, by providing an initiation system, a charge structure, a charge liner, a composite piezoelectric shell, a solenoid, and a modulation circuit, constitutes an explosion-electricity exchange device that can convert the ineffective detonation energy during the charge detonation process into electrical energy, thereby replacing the external capacitor in the existing strong magnetic field coupled shaped charge technology and realizing the passive design of the strong magnetic field coupled shaped charge; in addition, while significantly reducing the overall size, the charge energy is fully utilized, providing a new technical route for the miniaturization and feasibility design of the strong magnetic field coupled shaped charge.

Description

Technical Field

[0001] The present invention relates to a passive strong magnetic field coupled shaped charge device, and in particular to an explosive power exchange structure design, a composite piezoelectric shell design, and a charge structure design of the passive strong magnetic field coupled shaped charge, and belongs to the field of ammunition engineering. Background Art

[0002] The shaped metal jet device or ammunition is mainly composed of a liner, a charge structure, a shell, etc. When the charge detonates, the liner structure is compressed to form a metal jet. Since the metal jet has an extremely high speed, it can penetrate materials such as steel, concrete, and rock walls with a certain thickness. Therefore, the shaped metal jet device or ammunition is often used in weapons or equipment such as armor-piercing warheads, siege bombs, and oil perforating bullets.

[0003] The penetration performance of a shaped charge is primarily influenced by jet velocity and morphology. Existing research has demonstrated that magnetic confinement is an effective method for modifying jet velocity and morphology. Within this research context, a technique for coupling shaped charges with magnetic fields has been developed. This method applies magnetic fields at different stages of the shaped charge's inertial stretching. A capacitor serves as the energy source for the coupling system, generating an axial low-frequency electromagnetic field through a solenoid. As the shaped charge passes through the solenoid, coupling with the preloaded high magnetic field occurs based on the laws of electromagnetic induction. This improves the internal stress-strain state of the shaped charge, thereby delaying its fracture. The high magnetic field coupling also effectively suppresses and corrects the flipping and deflection of the fractured shaped charge particles, ensuring that the particles remain aligned after fracture. These two coupling effects of the high magnetic field on the shaped charge increase the effective length of the shaped charge, thereby improving its penetration capability. Furthermore, the high magnetic field coupling can effectively increase the axial velocity of the shaped charge. This higher axial velocity also contributes to improved penetration capability. The relevant research results of strong magnetic field coupled shaped charge provide theoretical guidance and experimental basis for the research and development and design of future high-power and new armor-piercing warheads.

[0004] However, existing technologies primarily rely on external capacitors to power the solenoid. These large power supplies make it difficult to integrate with shaped charge warheads, limiting their application in warheads and related industries. Furthermore, when the charge in a shaped charge detonates, only a portion of the charge's chemical energy is converted into the liner's internal and kinetic energy. The majority of the charge's energy is converted into the blast wave and the energy of the explosive products. This energy is ineffective in contributing to the shaped charge's penetration performance, resulting in low directional energy utilization. Summary of the Invention

[0005] Based on this, it is necessary to provide a passive strong magnetic field coupled shaped charge device to address the above technical problems.

[0006] In order to achieve the above object, the technical solution of the present invention is as follows:

[0007] A passive strong magnetic field coupled shaped charge device, comprising an initiation system, a charge structure, a charge liner, a composite piezoelectric shell, a solenoid and a modulation circuit;

[0008] The detonation system is arranged on the top of the composite piezoelectric shell and is used to detonate the explosive in the charge structure;

[0009] The charge structure is arranged inside the composite piezoelectric housing, and includes a primary explosive arranged below the initiation system, a secondary charge arranged below the primary explosive, a main charge arranged below the secondary charge, and an axial partition arranged between the secondary charge and the main charge. After the primary explosive is detonated, the axially propagating detonation wave is transmitted from the secondary charge to the main charge after the waveform is adjusted by the axial partition, and acts on the liner to form a metal jet.

[0010] The liner is arranged inside the composite piezoelectric shell and arranged below the main charge column;

[0011] The composite piezoelectric shell includes an outer protective layer, an outer diaphragm arranged on the inner side of the outer protective layer, a piezoelectric layer arranged on the inner side of the outer diaphragm, a shock wave modulation layer arranged on the inner side of the piezoelectric layer, an inner shell arranged on the inner side of the shock wave modulation layer, and a radial diaphragm arranged on the inner side of the inner shell. After detonating the explosive, the radially propagating detonation wave is regulated by the radial diaphragm and then transmitted into the inner shell to form a shock wave. After being modulated by the inner shell, the shock wave forms a waveform suitable for the piezoelectric material to perform explosive shock power exchange. At the same time, the piezoelectric material in the piezoelectric layer generates electrical energy under the impact and transmits it to the modulation circuit.

[0012] The solenoid is arranged inside the composite piezoelectric shell, and comprises a winding tube arranged below the liner and a spiral coil wound on the outside of the winding tube, for forming a strong magnetic field;

[0013] The modulation circuit is arranged inside the composite piezoelectric shell. The modulation circuit includes a voltage regulation module and a timing discharge module arranged below the winding tube, which are used to adjust the waveform and timing of the input current, output it to the spiral tube, generate a strong magnetic field, couple it into the metal jet, and adjust the shape and speed of the metal jet.

[0014] Preferably, the detonation system includes a connected detonation device and a firing mechanism.

[0015] Preferably, the detonating explosive is JH-11.

[0016] Preferably, the axial partition is made of polyurethane foam material, and the axial partition includes an upper end face, two inclined end faces arranged on both sides of the upper end face, and an arc-shaped lower end face arranged at the bottom ends of the two inclined end faces. An eight-shaped structure is formed between the two inclined end faces, and the upper end face, the two inclined end faces and the arc-shaped lower end face are an integrally formed structure.

[0017] Preferably, the medicine liner is made of copper material.

[0018] Preferably, the radial partition is made of polyurethane foam material, the inner shell is made of aluminum alloy material, the radial partition is distributed at intervals on the inner shell, the piezoelectric layer is made of piezoelectric ceramic material, and is installed at intervals in the inner groove on the inner side of the outer partition, and the surface of the piezoelectric layer is wrapped with foam cotton.

[0019] Preferably, the spiral coil is a copper enameled wire.

[0020] The advantages and beneficial effects of the present invention are as follows: the present invention provides a passive strong magnetic field coupled shaped charge device, which constitutes an explosion power exchange device by arranging a detonation system, a charge structure, a charge liner, a composite piezoelectric shell, a solenoid and a modulation circuit, and can convert the invalid detonation energy in the charge detonation process into electrical energy, thereby replacing the external capacitor in the existing strong magnetic field coupled shaped charge technology and realizing the passive design of the strong magnetic field coupled shaped charge; in addition, while greatly reducing the overall size, the charge energy is fully utilized, providing a new technical route for the miniaturization and feasibility design of the strong magnetic field coupled shaped charge. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a passive strong magnetic field coupled shaped charge device according to an embodiment of the present invention;

[0022] Figure 2 It is a cross-sectional view of a passive strong magnetic field coupled shaped charge device in an embodiment of the present invention.

[0023] Figure numerals: passive strong magnetic field coupled shaped charge device 00, explosive 1-1, auxiliary charge column 1-2, axial partition 1-3, main charge column 1-4, charge liner 2, inner shell 3-1, radial partition 3-2, shock wave modulation layer 3-3, piezoelectric layer 3-4, outer partition 3-5, outer protective layer 3-6, winding tube 4-1, solenoid coil 4-2, voltage regulating module 5-1, timed discharge module 5-2, initiation system 6. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0025] Reference Attachment Figure 1-2 The present invention designs an explosion-electricity exchange device, whose structure includes an initiation system 6, a charge structure, a charge liner 2, a composite piezoelectric shell, a solenoid and a modulation circuit. During the charge detonation process, the composite piezoelectric shell can form an electric current in the solenoid under the action of the explosion impact, thereby forming a confined magnetic field, and then converting the invalid detonation energy during the charge detonation process into electrical energy, thereby replacing the external capacitor in the existing strong magnetic field coupled shaped charge technology and realizing the passive design of the strong magnetic field coupled shaped charge.

[0026] In this embodiment, the detonation system 6 is arranged on the top of the composite piezoelectric shell, and is used to detonate the explosive 1-1 in the charge structure, wherein the detonation system 6 includes a connected detonating device and an ignition mechanism. The detonating device can be a fuse for sending a detonation signal, and the ignition mechanism can be a detonator for receiving the detonation signal and then igniting the explosive 1-1.

[0027] In this embodiment, the charge structure is arranged inside the composite piezoelectric shell, and the charge structure includes a primary explosive 1-1 arranged below the initiation system 6, a secondary charge 1-2 arranged below the primary explosive 1-1, a main charge 1-4 arranged below the secondary charge 1-2, and an axial partition 1-3 arranged between the secondary charge 1-2 and the main charge 1-4. After the primary explosive 1-1 is detonated, the axially propagating detonation wave is transmitted from the secondary charge 1-2 to the main charge 1-4 after the waveform is adjusted by the axial partition 1-3, and acts on the liner 2 to form a metal jet.

[0028] In this embodiment, the detonator 1-1 adopts JH-11; common high-energy charges such as RDX, octogen, and tyne can be used in the auxiliary charge column 1-2 and the main charge column 1-4, which can be selected according to needs and are not limited here; the axial partition 1-3 is made of polyurethane foam material, and the axial partition 1-3 includes an upper end face, two inclined end faces arranged on both sides of the upper end face, and an arc-shaped lower end face arranged at the bottom of the two inclined end faces. An eight-shaped structure is formed between the two inclined end faces, and the upper end face, the two inclined end faces and the arc-shaped lower end face are an integrally formed structure, and a special-shaped design is used to adjust the detonation wave.

[0029] In this embodiment, the charge liner 2 is arranged inside the composite piezoelectric shell and arranged below the main charge columns 1-4; the charge liner 2 is made of copper material.

[0030] In this embodiment, the liner 2 is made of copper material and formed by cold extrusion, so it has good grain size.

[0031] In this embodiment, the composite piezoelectric shell includes an outer protective layer 3-6, an outer partition 3-5 arranged on the inner side of the outer protective layer 3-6, a piezoelectric layer 3-4 arranged on the inner side of the outer partition 3-5, a shock wave modulation layer 3-3 arranged on the inner side of the piezoelectric layer 3-4, an inner shell 3-1 arranged on the inner side of the shock wave modulation layer 3-3, and a radial partition 3-2 arranged on the inner side of the inner shell 3-1. After detonating the explosive 1-1, the radially propagating detonation wave is regulated by the radial partition 3-2 and then transmitted into the inner shell 3-1 to form a shock wave. After being modulated by the inner shell 3-1, the shock wave forms a waveform suitable for explosive impact exchange of electricity by the piezoelectric material. At the same time, the piezoelectric material in the piezoelectric layer 3-4 generates electrical energy under the impact and transmits it to the modulation circuit.

[0032] In this embodiment, the radial partition 3-2 is made of polyurethane foam material and is used to adjust the parameters of the detonation wave acting on the inner shell 3-1; the inner shell 3-1 is made of aluminum alloy material to ensure the overall structural strength, and radial partitions 3-2 are distributed at intervals thereon to provide space for the piezoelectric material layer; the piezoelectric layer 3-4 is made of piezoelectric ceramic material and is installed at intervals in the inner groove on the inner side of the outer partition 3-5, and its surface is wrapped with soft foam cotton to prevent accidental discharge during falling and other impact processes; the outer shell is used to form the sealing shape of the entire composite layer.

[0033] In this embodiment, the solenoid is arranged inside the composite piezoelectric shell, and the solenoid includes a winding tube 4-1 arranged below the medicine liner 2 and a solenoid coil 4-2 wound outside the winding tube 4-1, which is used to form a strong magnetic field.

[0034] In this embodiment, the solenoid coil 4-2 is a copper enameled wire, which is wound on a bobbin 4-1 to form a strong magnetic field. The bobbin 4-1 is mechanically connected to the composite piezoelectric shell, and the shaped charge explosion height is given by the bobbin 4-1.

[0035] In this embodiment, the modulation circuit is arranged inside the composite piezoelectric shell. The modulation circuit includes a voltage regulating module 5-1 and a timing discharge module 5-2 arranged below the winding tube 4-1, which are used to adjust the waveform and timing of the input current, output it to the spiral tube, generate a strong magnetic field, couple it into the metal jet, and adjust the shape and speed of the metal jet.

[0036] In this embodiment, the current of the piezoelectric layer 3-4 enters the modulation circuit, and its timing and waveform are adjusted to form a strong magnetic field in the solenoid and couple with the jet.

[0037] In this embodiment, the present invention relates to a passive strong magnetic field coupling shaped charge device 00, the working process and principle of which are mainly divided into the following steps:

[0038] (1) The initiation system 6 sends an initiation signal through an initiation device (e.g., a fuze), which enters a firing mechanism (e.g., a detonator), thereby igniting the initiator 1-1. The axially propagating detonation wave is transmitted from the auxiliary charge 1-2 to the main charge 1-4 after the waveform is adjusted by the axial partition 1-3, and acts on the liner 2 to form a metal jet;

[0039] (2) The radially propagating detonation wave is regulated by the radial partition 3-2 and then transmitted into the inner shell 3-1 to form a shock wave. The shock wave is modulated by the inner shell 3-1 to form a waveform suitable for explosive shock exchange of piezoelectric materials;

[0040] (3) The piezoelectric material in the piezoelectric layer 3-4 generates electrical energy under the action of the impact and transmits it to the modulation circuit;

[0041] (4) The modulation circuit adjusts the waveform and timing of the input current and outputs it to the spiral tube to generate a strong magnetic field, which is coupled to the metal jet to achieve the shape and speed adjustment of the metal jet.

[0042] In summary, the present invention relates to a passive strong magnetic field coupled shaped charge device 00, whose energy conversion process includes charge detonation energy, piezoelectric ceramic electrical energy, coil electromagnetic energy and metal jet kinetic energy in sequence. A composite piezoelectric shell is used as a power source, which can convert the invalid detonation energy in the charge detonation process into electrical energy, thereby replacing the external capacitor in the existing strong magnetic field coupled shaped charge technology, and realizing the passive design of the strong magnetic field coupled shaped charge. In addition, while greatly reducing the overall size, the charge energy is fully utilized, providing a new technical route for the miniaturization and feasibility design of the strong magnetic field coupled shaped charge.

[0043] Obviously, those skilled in the art will appreciate that the various steps of the present invention described above can be performed in different ways than the present invention, and that simulation methods and experimental equipment include but are not limited to those described above. The various steps of the present invention described above can, in some cases, be performed in a different order than that shown here, and the steps shown or described above can be performed separately. Therefore, the present invention is not limited to any particular combination of hardware and software.

[0044] The above content is a further detailed description of the present invention in conjunction with specific embodiments, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A passive strong magnetic field coupled shaped charge device, characterized in that: It includes an initiation system, a charge structure, a charge liner, a composite piezoelectric shell, a solenoid and a modulation circuit; The detonation system is arranged on the top of the composite piezoelectric shell and is used to detonate the explosive in the charge structure; The charge structure is arranged inside the composite piezoelectric shell, and the charge structure includes an explosive arranged below the detonation system, an auxiliary charge column arranged below the explosive, a main charge column arranged below the auxiliary charge column, and an axial partition arranged between the auxiliary charge column and the main charge column. After the detonation of the explosive, the axially propagating detonation wave is transmitted from the auxiliary charge column to the main charge column after the waveform is adjusted by the axial partition, and the charge liner is acted on to form a metal jet. The axial partition is made of polyurethane foam material, and the axial partition includes an upper end face, two oblique end faces arranged on both sides of the upper end face, and an arc-shaped lower end face arranged at the bottom ends of the two oblique end faces. An eight-shaped structure is formed between the two oblique end faces, and the upper end face, the two oblique end faces and the arc-shaped lower end face are an integrally formed structure. The liner is arranged inside the composite piezoelectric shell and arranged below the main charge column; The composite piezoelectric shell includes an outer protective layer, an outer diaphragm arranged on the inner side of the outer protective layer, a piezoelectric layer arranged on the inner side of the outer diaphragm, a shock wave modulation layer arranged on the inner side of the piezoelectric layer, an inner shell arranged on the inner side of the shock wave modulation layer, and a radial diaphragm arranged on the inner side of the inner shell. After detonating the explosive, the radially propagating detonation wave is regulated by the radial diaphragm and then transmitted into the inner shell to form a shock wave. After being modulated by the inner shell, the shock wave forms a waveform suitable for the piezoelectric material to perform explosive shock power exchange. At the same time, the piezoelectric material in the piezoelectric layer generates electrical energy under the impact and transmits it to the modulation circuit. The solenoid is arranged inside the composite piezoelectric shell, and comprises a winding tube arranged below the liner and a spiral coil wound on the outside of the winding tube, for forming a strong magnetic field; The modulation circuit is arranged inside the composite piezoelectric shell. The modulation circuit includes a voltage regulation module and a timing discharge module arranged below the winding tube, which are used to adjust the waveform and timing of the input current, output it to the spiral tube, generate a strong magnetic field, couple it into the metal jet, and adjust the shape and speed of the metal jet.

2. A passive high-magnetic-field coupled shaped charge device according to claim 1, characterized in that: The detonation system comprises a connected detonation device and a firing mechanism.

3. The passive high-magnetic-field coupled shaped charge device according to claim 1, characterized in that: The medicine liner is made of copper material.

4. The passive high-magnetic-field coupled shaped charge device according to claim 1, characterized in that: The radial partition is made of polyurethane foam material, the inner shell is made of aluminum alloy material, and radial partitions are distributed at intervals on the inner shell. The piezoelectric layer is made of piezoelectric ceramic material and is installed at intervals in the inner groove inside the outer partition. The surface of the piezoelectric layer is wrapped with foam cotton.

5. The passive high-magnetic-field coupled shaped charge device according to claim 1, characterized in that: The spiral coil is a copper enameled wire.

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