A blast-kill warhead with charge cavity compartmentation

Abstract

This invention provides a high-explosive warhead with a compartmentalized loading chamber, comprising a warhead shell, within which multiple partitions divide the warhead loading chamber into several smaller cavities. Multiple through-holes are formed in the partitions, and flexible baffles are installed at these through-holes. This invention uses partitions to divide the warhead loading chamber into multiple independent small spaces. After the high explosive is melted and loaded into the warhead loading chamber, the flexible baffles open and the partition through-holes are open, allowing the multiple independent small spaces to communicate with each other. After the high explosive cools and solidifies, the flexible baffles close and the partition through-holes close, isolating the high explosive in multiple independent small spaces. This achieves the division of a large-sized high explosive into smaller sizes. The reduced size of the high explosive significantly decreases its sensitivity to temperature changes, preventing crack formation and ensuring safety.

Description

Technical Field

[0001] This invention belongs to the field of explosive fragmentation warhead design technology, and relates to auxiliary devices for explosive fragmentation warheads, particularly to an explosive fragmentation warhead with a compartmentalized charge chamber device. Background Technology

[0002] A high-explosive fragmentation warhead consists of a metallic warhead casing and an internal high-explosive charge. It destroys targets through the blast effect generated when the high-explosive detonates. Upon detonation, the high-explosive is converted into a large amount of high-temperature, high-pressure gas within fractions of a second. The expansion of this gas causes the warhead casing to rupture, generating a shock wave in the surrounding air. This shock wave has a pressure of approximately 20 GPa and a temperature of approximately 5000°C, capable of damaging personnel and lightly armored targets, playing a crucial role in modern local warfare.

[0003] Because high explosives have a high coefficient of thermal expansion (on the order of 10). -4 The metal material of the warhead casing has a low coefficient of thermal expansion (on the order of 10). -5 As ambient temperature rises, high explosives expand significantly, while the warhead casing expands less noticeably. Because the high explosives are inside the warhead casing, their expansion is constrained by the metal casing, resulting in considerable compressive stress. For a 600mm diameter high explosive fragmentation warhead, cracks are easily generated inside the compressed high explosives.

[0004] According to existing technology, as the size of high explosives increases, their thermal expansion deformation is greater, resulting in higher stress and a greater susceptibility to cracking. With the continuous development of high-explosive fragmentation warheads, their diameters have also increased, now reaching 750mm. As temperature changes occur, the risk of cracking gradually increases. Cracked explosives are prone to accidental ignition during launch; therefore, internal cracking is not permitted in military explosives. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a high-explosive warhead with a compartmentalized charge chamber, thereby solving the technical problem in the prior art where large-sized high explosives are compressed by the warhead casing after expansion, resulting in significant compressive stress and easy cracking inside the high explosives.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A high-explosive warhead with a compartmentalized charge chamber includes a warhead shell, which is a rotating body and is closed at both ends along its axial direction. The sealed space inside the warhead shell is the warhead charge chamber, which is used to fill with high explosives. The thermal expansion coefficient of the high explosives is greater than that of the material of the warhead shell.

[0008] The warhead housing is provided with multiple partitions, the outer edges of which are fixed to the inner wall of the warhead housing. The multiple partitions divide the warhead loading chamber into several small cavities. Multiple partition through holes are provided on the partitions, and flexible baffles are coaxially arranged at the partition through holes.

[0009] The warhead housing is provided with multiple partitions, the outer edges of which are fixed to the inner wall of the warhead housing. The multiple partitions divide the warhead loading chamber into several small cavities. Multiple partition through holes are provided on the partitions, and flexible baffles are coaxially arranged at the partition through holes.

[0010] The flexible baffle is a circular structure, composed of multiple fan-shaped baffles of the same shape and size. The radial outer edges of the fan-shaped baffles are integrally connected and fixed to the partition plate, and the apexes of the radial inner ends of the fan-shaped baffles converge at the center of the flexible baffle. The thickness of the flexible baffle is 3 to 3.5 mm.

[0011] When multiple sector-shaped baffles are fully closed, the through holes of the partition are completely covered by the flexible baffles, and at this time, the several small cavities of the warhead loading chamber are not connected to each other; when multiple sector-shaped baffles are partially or fully open, a baffle opening is formed at the center of the flexible baffle, the through holes of the partition are partially or fully open and connected to the baffle opening, and at this time, the several small cavities of the warhead loading chamber are connected to each other.

[0012] The present invention also includes the following technical features:

[0013] Specifically, the flexible baffle consists of six fan-shaped baffles.

[0014] Specifically, the inner diameter of the through hole in the partition plate and the maximum inner diameter of the baffle opening are both 50mm.

[0015] Specifically, the distance between the centers of two adjacent through holes on the same partition is 100mm.

[0016] Specifically, the flexible baffle is made of rubber.

[0017] Specifically, the partition includes two first partitions and multiple second partitions; the first partitions are arranged along the axial direction of the warhead shell, the central axis of the first partition coincides with the axis of rotation of the warhead shell, and the two first partitions are perpendicular to each other; multiple partition through holes on the first partitions are equally spaced along the axis of rotation of the warhead shell; the radial line of the second partition is perpendicular to the axis of rotation of the warhead shell, the center of the second partition coincides with the axis of rotation of the warhead shell, multiple second partitions are equally spaced along the axis of rotation of the warhead shell, and multiple partition through holes on the second partitions are equally spaced along a direction perpendicular to the axis of rotation of the warhead shell.

[0018] Specifically, the number of the second partitions is five.

[0019] Specifically, the warhead housing is divided into a front part, a middle part, and a rear end cover from front to back. The front part and the middle part are integrated, and the rear end cover is detachably fixed to the axial rear end of the middle part.

[0020] Compared with the prior art, the present invention has the following technical effects:

[0021] This invention uses a partition to divide the warhead's charge chamber into multiple independent small spaces. After the high explosive melts, it is loaded into the warhead's charge chamber. At this time, the flexible baffle opens and the partition's through-holes are open, and the multiple independent small spaces are interconnected. After the high explosive cools and solidifies, the flexible baffle closes and the partition's through-holes are closed, and the high explosive is isolated in multiple independent small spaces. This achieves the division of large-sized high explosives into smaller sizes. After the size of the high explosive is reduced, its sensitivity to temperature changes is greatly reduced, avoiding the generation of cracks and ensuring safety. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a high-explosive warhead with a compartmentalized explosive charge chamber.

[0023] Figure 2 This is a schematic diagram of the warhead casing.

[0024] The meanings of the labels in the figure are as follows: 1-warhead shell, 2-partition through hole, 3-flexible baffle, 4-baffle opening, 5-first partition, 6-second partition.

[0025] 101 - Front part of warhead casing, 102 - Middle part of warhead casing, 103 - Rear end cover of warhead casing.

[0026] The specific content of the present invention will be further explained in detail below with reference to the embodiments. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, all components, explosives and materials in this invention are those known in the art.

[0028] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0029] Example 1:

[0030] This embodiment provides a high-explosive warhead with a compartmentalized explosive charge chamber, such as... Figure 1 As shown, the device includes a warhead shell 1, which is a rotating body with both axial ends closed. The sealed space inside the warhead shell 1 is the warhead loading chamber, which is used to fill with high explosives. The thermal expansion coefficient of the high explosives is greater than that of the material of the warhead shell 1. Multiple partitions are provided inside the warhead shell 1, with the outer edges of the partitions fixed to the inner wall of the warhead shell 1. These partitions divide the warhead loading chamber into several smaller cavities. Multiple partition through-holes 2 are provided on the partitions, and flexible baffles 3 are coaxially arranged at the through-holes 2. The flexible baffles 3 are circular. The flexible baffle 3 is composed of multiple fan-shaped baffles of the same shape and size. The radial outer edges of the fan-shaped baffles are integrally connected and fixed to the partition plate, and the apexes of the radial inner ends of the fan-shaped baffles converge at the center of the flexible baffle 3. When the multiple fan-shaped baffles are completely closed, the partition plate through hole 2 is completely covered by the flexible baffle 3, and at this time, the several small cavities of the warhead loading chamber are not connected to each other. When the multiple fan-shaped baffles are partially or fully open, a baffle opening 4 is formed at the center of the flexible baffle 3, and the partition plate through hole 2 is partially or fully open and connected to the baffle opening 4. At this time, the several small cavities of the warhead loading chamber are connected to each other.

[0031] In this embodiment, the warhead casing 1 is made of conventional metals known in the prior art, preferably high-strength stainless steel, which has a low coefficient of thermal expansion. The high explosive is a conventional high explosive known in the prior art, whose main components include main explosive (RDX, octogen, etc.), curing agent (isocyanate curing agent or epoxy resin curing agent, etc.), aluminum powder, etc., and this high explosive has a high coefficient of thermal expansion. A compartmentalized charging chamber is formed by using partitions, partition through holes 2, flexible baffles 3, and baffle openings 4, which can divide the large-sized high explosive into smaller sizes, thereby reducing the temperature sensitivity of the high explosive and avoiding cracking of the high explosive due to changes in ambient temperature.

[0032] As a specific embodiment, the thickness of the flexible baffle 3 is 3mm.

[0033] As a specific embodiment of this invention, the flexible baffle 3 is composed of six fan-shaped baffles.

[0034] As a specific embodiment, the inner diameter of the partition through hole 2 and the maximum inner diameter of the baffle opening 4 are both 50mm.

[0035] As a specific embodiment, the distance between the centers of two adjacent through holes 2 on the same partition is 100mm.

[0036] As a specific embodiment, the flexible baffle 3 is made of conventional rubber known in the prior art.

[0037] As one specific solution in this embodiment, such as Figure 1 As shown, the partition includes two first partitions 5 and multiple second partitions 6; the first partitions 5 are arranged along the axial direction of the warhead housing 1, the central axis of the first partitions 5 coincides with the axis of rotation of the warhead housing 1, and the two first partitions 5 are perpendicular to each other; multiple partition through holes 2 located on the first partitions 5 are arranged at equal intervals along the axis of rotation of the warhead housing 1; the radial lines of the second partitions 6 are perpendicular to the axis of rotation of the warhead housing 1, the center of the second partitions 6 coincides with the axis of rotation of the warhead housing 1, multiple second partitions 6 are arranged at equal intervals along the axis of rotation of the warhead housing 1, and multiple partition through holes 2 located on the second partitions 6 are arranged at equal intervals along a direction perpendicular to the axis of rotation of the warhead housing 1.

[0038] As one specific embodiment, the number of second partitions 6 is five.

[0039] As a specific embodiment, the first partition 5 is a thin plate structure, and the shape of the cross-section of the first partition 5 is the same as the shape of the cross-section of the warhead loading cavity.

[0040] As a specific embodiment, the second partition 6 is a circular plate structure, and the center of the second partition 6 coincides with the axis of rotation of the warhead shell 1.

[0041] As a specific embodiment, both the first partition 5 and the second partition 6 are made of conventional metals known in the prior art, preferably high-strength stainless steel, to ensure the overall structural strength of the warhead.

[0042] As one specific solution in this embodiment, such as Figure 2As shown, the warhead casing 1 is divided into a front part 101, a middle part 102, and a rear end cover 103 from front to back. The front part 101 and the middle part 102 are integrated, and the rear end cover 103 is detachably fixed to the axial rear end of the middle part 102. The front part 101 is a hollow, cone-shaped structure with an arc-shaped front end face and an arc-shaped generatrix on the side. The middle part 102 is a hollow cylindrical structure. The rear end cover 103 is a circular plate structure.

[0043] The method of using the explosive-killing warhead with a compartmentalized explosive charge chamber of the present invention includes the following steps:

[0044] Step 1, device assembly: Assemble the first partition 5 and the second partition 6 with the flexible baffle 3, and then assemble the first partition 5 and the second partition 6 with the warhead shell 1.

[0045] Step 2, explosive loading: First, melt the high explosive, then stand the warhead casing 1 upright with the front end of the warhead casing 1 facing downwards and the rear end of the warhead casing 1 facing upwards. Open the rear end cover 103 of the warhead casing and load the melted high explosive from the open axial rear end of the warhead casing 102 in the middle. The melted high explosive flows through the partition through hole 2 into the warhead loading chamber. Under the action of gravity, the melted high explosive pushes open the multiple fan-shaped baffles of the flexible baffle 3, making the partition through hole 2 open. The melted high explosive passes through the partition through hole 2 and the baffle opening 4 in one go until the warhead loading chamber is full. At this time, the pressure values ​​on both sides of the flexible baffle 3 are the same, and the multiple fan-shaped baffles are completely closed.

[0046] Step 3, Cooling and Solidification: After the high explosive to be melted cools and solidifies, since the baffle opening 4 is completely closed, the warhead charging chamber is divided into multiple independent spaces. These independent spaces are not connected to each other. The high explosive is divided into multiple parts, each part of the high explosive is smaller in size, and its sensitivity to thermal expansion and contraction is greatly reduced. As the temperature changes, the risk of cracking is greatly reduced.

[0047] The design concept and working principle of the explosive-killing warhead with a compartmentalized explosive charge chamber of the present invention are as follows:

[0048] Due to their high coefficient of thermal expansion, high explosives undergo significant dimensional changes with temperature. During thermal expansion and contraction, high explosives are prone to cracking, and this tendency increases with volume. Cracked high explosives are susceptible to accidental ignition during launch; therefore, internal cracking is strictly prohibited in military explosives.

[0049] The present invention divides the inner cavity of the warhead casing 1 into multiple independent small parts, each of which is small in size. After the high explosive is loaded into the warhead casing 1, the high explosive is divided into multiple independent small parts, each of which is small in size. After the size is reduced, the high explosive is less sensitive to temperature changes. The small-sized high explosive is less likely to crack after thermal expansion and contraction, thus meeting the requirements for the use of high explosive.

[0050] The technical challenge of this invention lies in how to smoothly fill the warhead loading chamber with high explosive after dividing the internal space of the warhead casing 1 into multiple independent small portions. To overcome this technical challenge, this invention divides the internal space of the warhead casing 1 into multiple independent spaces using a first partition 5 and a second partition 6. Partition through-holes 2 are designed on the first and second partitions 5 and 6, and flexible baffles 3 are connected to the through-holes 2. The flexible baffles 3 open when the pressure on both sides is unequal and close when the pressure on both sides is equal. Therefore, when high explosive is loaded into the warhead casing 1, the baffle opening 4 opens, allowing the high explosive to fill the warhead loading chamber. After the high explosive is loaded, the baffle opening 4 closes, and after the high explosive solidifies, it is completely divided into multiple independent small portions, achieving the goal of small size.

[0051] As can be seen from the above analysis, the present invention divides the warhead charge chamber into multiple compartments along the axial direction and multiple zones along the circumferential direction through the first partition 5 and the second partition 6, which greatly reduces the size of the high explosive charge, makes it less sensitive to thermal expansion and contraction, and makes it less prone to cracking.

[0052] During the design and development process of this invention, it was discovered that if the inner diameter of the through-hole 2 of the partition plate is too small, the resistance to the flow of high explosive through the through-hole 2 will be too great, causing the high explosive to be unable to flow. Consequently, some space inside the warhead casing 1 will not be filled with high explosive, resulting in the failure of high explosive loading into the warhead casing 1. If the inner diameter of the through-hole 2 of the partition plate is too large, the size of the flexible baffle 3 will increase accordingly. The baffle opening 4 is coaxial with the through-hole 2 of the partition plate and has the same inner diameter. Therefore, the inner diameter of the baffle opening 4 also increases with the increase of the inner diameter of the through-hole 2 of the partition plate. After the high explosive is loaded into the warhead casing 1, during the waiting process for the high explosive to cool and solidify, due to the excessive size of the baffle opening 4, although the pressure on the flexible baffle 3 is the same in all directions, the flexible baffle 3 has a large weight due to its large size and poor rigidity. Under the action of its own weight, the baffle opening 4 will open, causing the high explosive that has been separated to reconnect. In this case, it is impossible to avoid the phenomenon of cracking due to thermal expansion and contraction by reducing the size of the high explosive.

[0053] To avoid the above problems, the present invention has determined through a large number of experiments that when the inner diameter of the through hole 2 of the partition is 50mm, the flow of high explosive will not be affected. Moreover, after the high explosive fills the charge chamber of the warhead, the baffle opening 4 can be completely closed, thereby dividing the high explosive into multiple independent small parts and avoiding the phenomenon of the high explosive connecting with each other during the cooling and solidification process.

[0054] During the design and development process of this invention, it was discovered that if the thickness of the flexible baffle 3 is too large, its stiffness is too high, requiring significant gravity to deform it and open the multiple fan-shaped baffles (i.e., the baffle opening 4 will easily close but be difficult to open). This can lead to the multiple fan-shaped baffles closing before the high explosive charge chamber is fully filled, resulting in charging failure. If the thickness of the flexible baffle 3 is too small, its stiffness is too low. During charging, the high explosive forces the multiple fan-shaped baffles apart. After charging, due to the low stiffness of the flexible baffle 3, the multiple fan-shaped baffles are difficult to close automatically, causing the separated high explosive to reconnect. In this case, it is impossible to reduce the size of the high explosive to avoid cracking caused by thermal expansion and contraction.

[0055] To avoid the aforementioned problems, this invention, through partial theoretical calculations and collective discussion with experienced personnel, decomposed the issues and conducted individual experimental evaluations for each module. Ultimately, it was determined that when the thickness of the flexible baffle 3 is 3–3.5 mm, all the above problems can be avoided. The flexible baffle 3 has sufficient rigidity; after loading, its own rigidity can close the baffle opening 4, dividing the high explosive into multiple independent small parts. Furthermore, the rigidity of the flexible baffle 3 is not excessive, and will not affect the flow of the high explosive. The high explosive can open the baffle opening 4 solely by its own gravity, allowing for smooth loading.

[0056] Through the above design, the design advantages of the present invention can be fully realized, the functions of the present invention can be fully utilized, and the problem can be solved effectively by using the present invention.

[0057] Verification of the effect of Example 1:

[0058] Ten high-explosive fragmentation warheads with compartmentalized loading chambers, as described in Example 1, were processed and used according to the steps above. After loading, a CT scan of the high explosive charge inside the warhead casing 1 revealed that the high explosive charge filled the loading chamber completely without gaps, and all the baffle openings 4 were closed, thoroughly dividing the high explosive charge into multiple independent small modules. The high-explosive fragmentation warheads were then placed in a high-temperature chamber, heated to 70°C, and then cooled to 40°C, repeated ten times. A second CT scan showed that all the high explosive charge inside the warhead casing 1 was intact, with no cracks found. These results demonstrate the effectiveness of the invention.

[0059] Example 2:

[0060] This embodiment provides a detonation warhead with a compartmentalized explosive chamber. The structure of this device is basically the same as that of Embodiment 1, except that the thickness of the flexible baffle 3 is 3.5 mm in this embodiment.

[0061] Verification of the effect of Example 2:

[0062] Ten high-explosive fragmentation warheads with compartmentalized loading chambers, as described in Example 2, were processed and used according to the steps above. After loading, a CT scan of the high explosive charge inside the warhead casing 1 revealed that the high explosive charge filled the loading chamber completely without gaps, and all the baffle openings 4 were closed, thoroughly dividing the high explosive charge into multiple independent small modules. The high-explosive fragmentation warheads were then placed in a high-temperature chamber, heated to 70°C, and then cooled to 40°C, repeated ten times. A second CT scan revealed that all the high explosive charge inside the warhead casing 1 was intact, with no cracks found. These results demonstrate the effectiveness of the invention.

Claims

1. A high-explosive warhead with a compartmentalized loading chamber, comprising a warhead shell (1), the warhead shell (1) being a rotating body, both axial ends of the warhead shell (1) being closed; the sealed space inside the warhead shell (1) being a warhead loading chamber, the warhead loading chamber being used to fill with high explosive, the thermal expansion coefficient of the high explosive being greater than the thermal expansion coefficient of the material of the warhead shell (1); characterized in that: The warhead housing (1) is provided with multiple partitions, the outer edges of which are fixed to the inner wall of the warhead housing (1). The multiple partitions divide the warhead loading chamber into several small cavities. Multiple partition through holes (2) are provided on the partitions, and flexible baffles (3) are coaxially provided at the partition through holes (2). The flexible baffle (3) is a circular structure. The flexible baffle (3) is composed of multiple fan-shaped baffles of the same shape and size. The radial outer edges of the fan-shaped baffles are integrally connected and fixed to the partition. The apex of the radial inner end of the fan-shaped baffles converges at the center of the flexible baffle (3). The thickness of the flexible baffle (3) is 3 to 3.5 mm. When multiple fan-shaped baffles are completely closed, the through hole (2) of the partition is completely covered by the flexible baffle (3), and at this time, the several small cavities of the warhead loading chamber are not connected to each other; when multiple fan-shaped baffles are partially or fully opened, a baffle opening (4) is formed at the center of the flexible baffle (3), the through hole (2) of the partition is partially or fully open and connected to the baffle opening (4), and at this time, the several small cavities of the warhead loading chamber are connected to each other; The inner diameter of the through hole (2) of the partition plate and the maximum inner diameter of the baffle opening (4) are both 50 mm; The partition includes two first partitions (5) and a plurality of second partitions (6); The first partition (5) is arranged along the axial direction of the warhead housing (1), and the central axis of the first partition (5) coincides with the axis of rotation of the warhead housing (1). The two first partitions (5) are perpendicular to each other. Multiple partition through holes (2) located on the first partition (5) are arranged at equal intervals along the axis of rotation of the warhead housing (1). The radial line of the second partition (6) is perpendicular to the axis of rotation of the warhead housing (1). The center of the second partition (6) coincides with the axis of rotation of the warhead housing (1). Multiple second partitions (6) are arranged at equal intervals along the axis of rotation of the warhead housing (1). Multiple partition through holes (2) located on the second partition (6) are arranged at equal intervals along the direction perpendicular to the axis of rotation of the warhead housing (1).

2. The explosive-killing warhead with a compartmentalized explosive charge chamber as described in claim 1, characterized in that, The flexible baffle (3) consists of six sector-shaped baffles.

3. The explosive-killing warhead with a compartmentalized explosive charge chamber as described in claim 1, characterized in that, The distance between the centers of two adjacent through holes (2) on the same partition is 100 mm.

4. The explosive-killing warhead with a compartmentalized explosive charge chamber as described in claim 1, characterized in that, The flexible baffle (3) is made of rubber.

5. The explosive-killing warhead with a compartmentalized explosive charge chamber as described in claim 1, characterized in that, The number of the second partitions (6) is five.

6. The explosive-killing warhead with a compartmentalized explosive charge chamber as described in claim 1, characterized in that, The warhead housing (1) is divided into a front part (101), a middle part (102) and a rear end cover (103) from front to back. The front part (101) and the middle part (102) are integrated, and the rear end cover (103) is detachably fixed at the axial rear end of the middle part (102).

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