High-speed rotating stable small-caliber armor-piercing fragmentation grenade

Abstract

This invention relates to the field of ammunition technology, and more particularly to a high-speed, rotationally stable, small-caliber armor-piercing fragmentation grenade, which is a fixed-load ammunition consisting of a fuse, a warhead, and a propellant charge. The warhead includes a projectile body and a propellant charge housed within the projectile body. The projectile body consists of an upper projectile body and a lower projectile body. The fuse is threaded to the upper projectile body, and the upper projectile body is threaded to the lower projectile body, with the closure points of both using a conical fit. The diameter of the fuse is equal to the diameter of the upper projectile body, and the head of the fuse is spherical. The lower projectile body is tightly fitted with the propellant charge via an interference fit, and the tail of the lower projectile body has a recessed bottom, with several gas guide holes evenly distributed on the sidewalls of the recessed bottom. This invention improves the flight stability and accuracy of the grenade; it also improves the armor-piercing and lethality; and it has strong anti-interference capabilities, self-destruction function, and self-disabling function.

Description

Technical Field

[0001] This invention relates to the field of ammunition technology, and in particular to a high-speed rotating stable small-caliber armor-piercing fragmentation grenade. Background Technology

[0002] Currently, both domestically and internationally, small-caliber grenades are primarily used as ammunition for grenade launchers, with armor-piercing and fragmentation grenades being a single type, possessing both armor-piercing and fragmentation capabilities. However, current grenade launcher ammunition, especially armor-piercing and fragmentation grenades, suffers from the following shortcomings:

[0003] 1. Insufficient accuracy in long-range strikes: The assembly precision of the fuse, warhead, and warhead body is difficult to guarantee, resulting in undulations on the surface of the projectile. During the high-speed rotation of the projectile, gas turbulence is generated on the surface of the projectile, which in turn affects the flight stability and strike accuracy of the projectile.

[0004] 2. The projectile has insufficient anti-jamming capability, high base drag, and poor ballistic performance;

[0005] 3. The warhead has low destructive power and armor-piercing power, especially poor aftereffect damage capability; 4. The fuse has no self-destruct or self-disabling (fire-out) function. Summary of the Invention

[0006] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention provides a high-speed, rotationally stable, small-caliber armor-piercing fragmentation grenade.

[0007] The technical solution adopted by this invention to solve its technical problem is:

[0008] A high-speed, rotationally stable, small-caliber armor-piercing fragmentation grenade is provided. The grenade is a fixed-load ammunition consisting of a fuse, a warhead, and a propellant charge. The warhead includes a projectile body and a propellant charge disposed within the projectile body. The projectile body consists of an upper projectile body and a lower projectile body. The fuse is threaded to the upper projectile body, and the upper projectile body is threaded to the lower projectile body, with the closure points of both using a conical fit. The diameter of the fuse is equal to the diameter of the upper projectile body, and the head of the fuse is spherical. The lower projectile body is tightly fitted with the propellant charge via an interference fit, and the tail of the lower projectile body has a recessed bottom, with several gas guide holes evenly distributed on the sidewalls of the recessed bottom.

[0009] In a preferred embodiment of the high-speed rotationally stable small-caliber armor-piercing fragmentation grenade provided by the present invention, the projectile belt is disposed on the lower projectile body.

[0010] In a preferred embodiment of the high-speed rotationally stable small-caliber armor-piercing fragmentation grenade provided by the present invention, the explosive loading cavity of the upper projectile body consists of a large-diameter cavity, a conical transition cavity, and a small-diameter cavity from the head to the tail; both the large-diameter cavity and the small-diameter cavity are pre-engraved with interwoven mesh-like grooves, so that each mesh is spindle-shaped.

[0011] In a preferred embodiment of the high-speed rotationally stabilized small-caliber armor-piercing fragmentation grenade provided by the present invention, the projectile charge includes a propellant grain, a detonation tube, an inert partition, and a shaped charge liner; the shaped charge liner, the inert partition, and the detonation tube are sequentially assembled in the inner cavity of the propellant grain from top to bottom; the shape of the propellant grain is adapted to the shape of the charge cavity; and the shaped charge liner does not extend beyond the conical transition cavity.

[0012] In a preferred embodiment of the high-speed rotationally stabilized small-caliber armor-piercing fragmentation grenade provided by the present invention, the length of the propellant charge within the large-diameter cavity is not less than 25 mm.

[0013] In a preferred embodiment of the high-speed rotationally stable small-caliber armor-piercing fragmentation grenade provided by the present invention, the inert partition is annular, and its inner diameter is smaller than the inner diameter of the propellant grain.

[0014] In a preferred embodiment of the high-speed rotationally stable small-caliber armor-piercing fragmentation grenade provided by the present invention, the detonation tube includes a detonating explosive and a tube shell, wherein the detonating explosive is filled inside the tube shell.

[0015] In a preferred embodiment of the high-speed rotationally stable small-caliber armor-piercing fragmentation grenade provided by the present invention, the detonation tube has a diameter of 10 mm and a thickness of 3 mm.

[0016] In a preferred embodiment of the high-speed rotationally stable small-caliber armor-piercing fragmentation grenade provided by the present invention, the fuze is a fuze with self-destruction and self-failure functions that has two built-in firing mechanisms.

[0017] Compared with the prior art, the high-speed rotationally stabilized small-caliber armor-piercing fragmentation grenade provided by the present invention has the following beneficial effects:

[0018] I. This invention uses a conical surface for positioning the upper and lower projectile bodies and the joint surface between the upper projectile body and the fuse, ensuring the coaxiality and connection strength of the projectile body and the fuse. The resulting projectile has an integrated outer surface that is basically the same cylindrical size, forming a fully centered structure without surface undulations. The surface will not generate gas turbulence due to abrupt changes, thus eliminating the impact of gas turbulence on accuracy. Moreover, it is equivalent to lengthening the cylindrical section of the projectile, improving its guidance performance in the barrel.

[0019] Second, the projectile head of the present invention is spherical. Although it has high aerodynamic drag, disturbances in all directions are perpendicular to the spherical surface and the force passes through the center of the sphere located on the axis. Therefore, it has the characteristic of strong anti-interference ability.

[0020] Third, the lower projectile of the present invention has a concave bottom, which weakens the intensity of the low-pressure vortex at the bottom of the projectile and fills the local vacuum area with air, thereby increasing the pressure at the bottom of the projectile, reducing the bottom resistance, and thus increasing the range; furthermore, several air guide holes are provided on the side wall of the concave bottom, so that the external airflow can enter the concave bottom, increasing the air pressure at the bottom of the projectile, further reducing the bottom resistance, making the trajectory more low-profile and improving the trajectory performance.

[0021] Fourth, the projectile body of the present invention adopts pre-controlled fragmentation technology, which ensures the consistency of the shape and quality of the fragments when the projectile body breaks apart, thereby improving the lethality;

[0022] Fifth, the present invention sets an inert partition in the explosive charge structure and places the inert partition between the detonation tube and the explosive column, which plays a role in changing the direction of the detonation wave and also increases the crushing force on the shaped charge liner, thereby improving the armor-piercing power.

[0023] VI. The present invention places the propellant liner of the projectile charge structure inside a large-diameter cavity inside the upper projectile body, which increases the effective amount of propellant in the warhead. Compared with the traditional structure, it eliminates the abrupt change in the end structure of the propellant column and the influence on the detonation stability of the explosive.

[0024] VII. The detonating tube used in this invention has a thinner detonating charge layer, a smaller length-to-diameter ratio, and a shorter and thicker overall structure. After detonation, the detonation wave propagation direction changes to radial propagation, which changes the propagation direction of the explosive detonation wave, strengthens the crushing force on the shaped charge liner, and enhances the armor-piercing power.

[0025] 8. The fuse used in this invention has a self-destruct function and a self-disabling (fireproof) function. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0027] Figure 1 This is an assembly structure diagram of the high-speed rotationally stable small-caliber armor-piercing fragmentation grenade provided by the present invention;

[0028] Figure 2 yes Figure 1 The provided structural diagram shows the projectile assembled with the aforementioned fuse and warhead;

[0029] Figure 3 yes Figure 1 A cross-sectional view of the projectile is provided;

[0030] Figure 4 yes Figure 1 The provided schematic diagram shows the structure of the projectile's explosive charge.

[0031] Figure 5 yes Figure 4 A schematic diagram of the structure of the provided detonation tube. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1

[0034] This embodiment provides a high-speed, rotationally stable, small-caliber armor-piercing fragmentation grenade, as shown in the attached figure. Figure 1 ~Attached Figure 3 As shown, the grenade is a fixed-load ammunition consisting of a fuse 1, a warhead 2, and a propellant charge 3. In this embodiment, the warhead 2 includes a projectile body 2.1 and a projectile charge 2.2 disposed within the projectile body; as shown in the attached diagram. Figure 3 As shown, the projectile 2.1 consists of an upper projectile 2.1.1 and a lower projectile 2.1.2. Specifically, the upper projectile 2.1 and the lower projectile 2.2 are assembled by threads, and both of them have a tapered surface 2.1.0 at their closing points. This connection method can ensure the coaxiality and connection strength of the projectile; similarly, as shown in the attached... Figure 2 As shown, in this embodiment, the fuse 1 and the upper projectile 2.1.1 are also threaded together, and the closure is fitted with a conical surface 2.1.0; and the diameter of the fuse 1 is equal to the diameter of the upper projectile 2.1.1. In this embodiment, the mating surfaces of the upper and lower projectiles and the upper projectile and the fuse are positioned using conical surfaces, ensuring the coaxiality and connection strength of the projectile and the fuse. The resulting projectile's outer surface is integrated, essentially a single cylindrical surface, and is a fully centered structure. There are no surface undulations, and the surface will not generate gas turbulence due to abrupt changes, thus eliminating the impact of external surface gas turbulence on accuracy. Moreover, it is equivalent to lengthening the cylindrical section of the projectile, improving its guidance performance in the bore.

[0035] Preferably, the head of the fuse 1 in this embodiment is spherical; although it has high aerodynamic drag, disturbances in all directions are perpendicular to the spherical surface, and the force passes through the center of the sphere located on the axis, thus it has the characteristic of strong anti-interference ability.

[0036] Preferably, in this embodiment, the lower projectile 2.1.2 and the propellant 3 are tightly joined by an interference fit, and the tail of the lower projectile 2.1.2 is provided with a bottom recess 2.1.3, which weakens the intensity of the low-pressure vortex at the bottom of the projectile and fills the local vacuum area with air, thereby increasing the pressure at the bottom of the projectile, reducing the bottom drag, and thus increasing the range. Furthermore, in this embodiment, a plurality of air guide holes 2.1.4 penetrating the lower projectile 2.1.2 are evenly distributed on the side wall of the bottom recess 2.1.3, allowing external airflow to enter the bottom recess, increasing the air pressure at the bottom of the projectile, further reducing the bottom drag, making the trajectory more low-profile and improving the ballistic performance.

[0037] Preferred options are listed below. Figure 3 As shown, in this embodiment, the projectile band 2.1.5 is provided on the lower projectile body 2.1.2. The projectile band allows the projectile to be inserted into the rifling, ensuring that the projectile's rotation is stable.

[0038] Preferably, in this embodiment, to ensure the strength of the connection structure between the upper and lower projectiles and the consistency of the outer wall, the loading cavity of the upper projectile 2.1.1 is sequentially divided into a large-diameter cavity 2.1.1a, a conical transition cavity 2.1.1b, and a small-diameter cavity 2.1.1c from head to tail. The large-diameter cavity 2.1.1a is screwed to the fuse 1, and the small-diameter cavity 2.1.1c is screwed to the lower projectile 2.1.2. Both the large-diameter cavity and the small-diameter cavity are pre-engraved with interwoven mesh grooves 2.1.10, making each mesh spindle-shaped. That is, pre-controlled fragmentation technology is used in the projectile body to ensure the consistency of the shape and quality of the fragments when the projectile breaks apart, thereby improving the lethality.

[0039] Preferred options are listed below. Figure 4 As shown, the projectile charge 2.2 in this embodiment includes a propellant grain 2.2.1, a detonation tube 2.2.2, an inert partition 2.2.3, and a shaped charge liner 2.2.4. The shaped charge liner 2.2.4, the inert partition 2.2.3, and the detonation tube 2.2.2 are sequentially assembled from top to bottom within the inner cavity of the propellant grain 2.2.1. The shape of the propellant grain 2.2.1 is adapted to the shape of the charging cavity. The shaped charge liner 2.2.4 does not extend beyond the conical transition cavity 2.1.1b. This embodiment places the shaped charge liner of the projectile charge structure within a large-diameter cavity inside the upper projectile body, increasing the effective propellant charge of the warhead. Compared to traditional structures, it eliminates the abrupt changes in the propellant grain and shaped charge liner end structure, thus eliminating the impact on the detonation stability of the explosive. Preferably, the length of the propellant grain within the large-diameter cavity is not less than 25 mm, ensuring the effective propellant charge of the warhead.

[0040] Preferably, in this embodiment, the inert partition 2.2.3 is annular, and its inner diameter d is smaller than the inner diameter D of the explosive charge 2.2.1. This embodiment incorporates an inert partition in the projectile's charge structure and places it between the detonation tube and the explosive charge, thereby altering the direction of the detonation wave propagation and increasing the compressive force on the shaped charge liner, thus enhancing its armor-piercing capability.

[0041] Preferred options are listed below. Figure 5 As shown, the detonation tube 2.2.2 in this embodiment includes a detonating charge 2.2.2a and a tube shell 2.2.2b, with the detonating charge filling the tube shell. Specifically, the detonation tube in this embodiment has a diameter of 10mm and a thickness of 3mm. Compared to the traditional 5mm thick detonation tube, the detonating charge layer in this embodiment is thinner, has a smaller length-to-diameter ratio, and a shorter and thicker overall structure. After detonation, the detonation wave propagation direction changes to radial propagation, which changes the propagation direction of the explosive detonation wave, strengthens the crushing force on the shaped charge liner, and enhances the armor-piercing power.

[0042] Preferably, the fuse 1 in this embodiment is a fuse with two built-in firing mechanisms and self-destruct and self-disabling functions, so that the grenade has self-destruct and self-disabling functions.

[0043] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A high-speed, spin-stabilized, small-caliber armor-piercing fragmentation grenade, wherein the grenade is a fixed-load ammunition consisting of a fuse, a warhead, and a propellant charge; characterized in that: The warhead includes a projectile body and a projectile charge disposed within the projectile body; The projectile consists of an upper projectile and a lower projectile. The fuse is threaded to the upper projectile and the upper projectile is threaded to the lower projectile, and the closure of both is tapered. The diameter of the fuse is equal to the diameter of the upper projectile, and the head of the fuse is spherical; The lower projectile body and the launching charge are tightly joined by an interference fit, and the tail of the lower projectile body is provided with a bottom recess, and the sidewall of the bottom recess is evenly distributed with a number of gas guide holes that penetrate the lower projectile body. The loading chamber of the upper projectile consists of a large-diameter chamber, a conical transition chamber, and a small-diameter chamber from the head to the tail. The large-diameter chamber and the small-diameter chamber are pre-engraved with interwoven mesh grooves, making each mesh spindle-shaped. The projectile charge includes a propellant grain, a detonation tube, an inert partition, and a shaped charge liner; the shaped charge liner, inert partition, and detonation tube are sequentially assembled in the inner cavity of the propellant grain from top to bottom; the shape of the propellant grain is adapted to the shape of the charging cavity; the shaped charge liner does not extend beyond the conical transition cavity.

2. The high-speed rotationally stabilized small-caliber armor-piercing fragmentation grenade according to claim 1, characterized in that: The cartridge belt is located on the lower cartridge body.

3. The high-speed rotationally stabilized small-caliber armor-piercing fragmentation grenade according to claim 1, characterized in that: The length of the drug cartridge within the large-diameter cavity is not less than 25 mm.

4. The high-speed rotationally stabilized small-caliber armor-piercing fragmentation grenade according to claim 1, characterized in that: The inert partition is annular, and its inner diameter is smaller than that of the drug pellet.

5. The high-speed rotationally stabilized small-caliber armor-piercing fragmentation grenade according to claim 1, characterized in that: The detonation tube includes a detonating explosive and a tube shell, with the detonating explosive filling the tube shell.

6. The high-speed rotationally stabilized small-caliber armor-piercing fragmentation grenade according to claim 5, characterized in that: The detonation tube has a diameter of 10 mm and a thickness of 3 mm.

7. The high-speed rotationally stabilized small-caliber armor-piercing fragmentation grenade according to any one of claims 1 to 6, characterized in that: The fuse is a self-destructing and self-failure fuse with two built-in firing mechanisms.

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