RU2400697C2 - 'tveritch-3' high-explosive projectile for short-range artillery piece - Google Patents

Abstract

FIELD: weapons and ammunition.

SUBSTANCE: proposed projectile comprises case accommodating explosive charge, bottom, front bottom and detonator, head part comprising head cap housing trajectory impact fuse and fragmentation unit with ready hitting elements. Note here that pyrotechnic device of separation is arranged between the case and head part. Barrel is arranged along the case axis, secured with case bottom and front bottom. Pyrotechnic device represents accelerator fitted in said barrel and secured to head part and containing powder charge with igniter. Note here that accelerator length approximates to projective case length, while its OD equals barrel ID.

EFFECT: higher hitting capacity.

3 cl, 3 dwg

Description

The invention relates to ammunition, and more particularly to shells with a time-divided formation of axial and circular fragmentation fields.

By the principle of action, such shells differ significantly from fragmentation-beam shells. As a prototype, a projectile can be adopted according to the patent [1]. The projectile contains a body with an explosive charge and a detonator, and a head part connected to it containing a trajectory-impact fuse and a fragmentation unit with ready-made striking elements (GGE), while a pyrotechnic separation device is placed between the body and the head part. With the shown scheme of the device, the head part when it is separated from the body receives a negligible speed. The projectile has high efficiency at high intrinsic velocity of the projectile. The use of this scheme in short-range projectiles does not give the desired effect due to the low speed of the GGE block. This is a disadvantage of the projectile. The present invention seeks to remedy this drawback.

The technical solution consists in the fact that the head part is equipped with an accelerator, informing it of a sufficient speed relative to the projectile. The accelerator is located on the axis of the projectile and is made with a length of the acceleration path close to the length of the shell of the projectile.

The invention is illustrated by drawings: figure 1 is a longitudinal section of a projectile; figure 2 - detachable part; figure 3 - diagram of the action of the projectile.

The shrapnel-fragmentation projectile comprises a housing 1 with an explosive charge (BB) 2, a detonator 3 and a front bottom 4 connected to the housing by a thread 5. A barrel 6 is mounted along the axis of the housing, bonded to the housing bottom and the front bottom. Figure 1 shows the rear location of the detonator, but its front location is also possible (at the front bottom).

A detachable part, including a head part 8 and an accelerator 9, is connected to the body by means of a thread 7. The head part includes a cap 10, a head trajectory-impact fuse 11 with a command receiver 12, a fragmentation block GPE 13, and a pyrotechnic charge expander 14. The accelerator includes a housing 15 filled with a powder charge 16 with an igniter 17. The igniter is connected to the head fuse by an electric wire 18. A moderator 19 is installed between the igniter 17 and the detonator 3.

The outer diameter of the accelerator body is equal to the inner diameter of the barrel.

A pyrotechnic charge expander, electrically connected to a trajectory-impact fuse, is placed along the axis of the fragmentation block of the finished striking elements.

The projectile is mainly intended for use in ammunition of light short-range rifled guns (infantry and mountain), which have a low muzzle velocity of 250 ... 300 m / s [2]. The projectile is multifunctional and allows for several types of actions. The main types are trajectory triggering in the target area with a time-separated ejection of the GGE block and undermining the projectile above the target (with a flat trajectory) or undermining a projectile upon impact on the ground (with a mounted trajectory). Entering the type of action and setting the time is done before firing through the receiver of the commands of the head fuse in a contact or non-contact manner.

Figure 3 shows the effect of the projectile with a flat trajectory. At a pre-empted point in front of the target, the lead fuse sends an electric signal to the igniter 17 through the wire 18, providing ignition of the powder charge 16 (Fig. 3, a). At the same time, a command is sent to the moderator 19 of the detonator 3. Under the action of powder gases, the movement of the head begins with the accelerator body sliding along the barrel 6 and cutting the thread 7 (Fig. 3, b).

The large length of the acceleration path of the warhead ensures that its velocity relative to the projectile is 100 ... 150 m / s at a projectile velocity on the trajectory of 200 m / s - this will lead to an increase in the kinetic energy of the GGE flow by 2.25 ... 3.06 times. After the shooting of the head part (Fig. 3, c), the pyrotechnic charge expander 14 is triggered with the cap 10 breaking, the GGE block being ejected and the GGE 20 axial flow forming.

The case with the explosive charge flies further and, depending on the installation, its detonation occurs either on the trajectory in the region of the target (Fig. 3, e), or upon impact into the ground. Thus, a combined effect is exerted on the target of the axial flow of the GGE and the circular field of fragments of natural fragmentation of the body. Unlike the conventional-fragmentation fragmentation projectile, the entire mass of the Tverich-2 projectile is used productively to hit the target. A detailed description of the types of action and advantages of the projectile is given in US Pat. No. 2158408 of the Russian Federation.

Trajectory blasting without separation of the warhead significantly increases the axial flow velocity of the GGE, but at the same time leads to its expansion. The presence in the shell of several types of trajectory detonation gives it the ability to adapt to the conditions of combat use.

Trajectory fuse can be made both temporary and speed, non-contact or command.

The probability of hitting a single target is determined by the formula:

W = 1- (l-Wz) (1-Wr),

where Wz, Wr are the probabilities of hitting the target with the axial flow of the GGE and the circular field of fragments of the hull, respectively.

Below are the calculated data of the shrapnel-fragmentation projectile for a 120-mm gun of the Tver type (gun mass 520 kg, muzzle velocity 300 m / s).

Weight 17 kg Explosive charge mass 4 kg The mass of the detachable part 4 kg Mass of fragmentation block GPE 2 kg The mass of one GGE 2 g The number of GGE 1000 GGE ejection velocity relative to the projectile 100 m / s Optimum ejection range 10 m Target GGE Speed 300 m / s Kinetic energy of the GGE at the target 90 j The probability of hitting the target with axial flow Wz 0.7 The probability of hitting a target with a circular field Wr 0.5 Total probability of defeat 0.85

For shells with a separate formation of the axial and circular fields, the code name “Tverich” was previously used [3-5]. The proposed new name for such shells “shrapnel-fragmentation” contains information about the principle of operation of the shell. At the first stage, the projectile acts like an ordinary powder shrapnel, at the second stage - like a fragmentation projectile.

The technical result of the invention is to increase the firepower of short-range artillery guns.

Literature

1. Patent RU 2158408.

2. Patent RU 2213315.

3. Odintsov V.A. New types of fragmentation-beam shells. // Defense technology, No. 3-4, 2007.

4. Odintsov V.A. 21st Century Fragmentation-Shell Ammunition. // Ammunition and high-energy condensed systems. Issue 2, 2008.

5. Application No. 2006123386 (decision on the grant of a patent dated June 26, 2008).

Claims (3)

1. Shrapnel-fragmentation projectile for short-range artillery, comprising a housing with an explosive charge, a bottom, a front bottom and a detonator connected to a head part containing a head cap with a trajectory-fuse and a fragmentation unit with ready-to-use striking elements, while between a pyrotechnic separation device, characterized in that a barrel attached to the bottom of the housing and the front bottom of the housing, a pyrotechnic separation device is placed on the housing and the head part configured as a bore disposed in an accelerator attached to the head portion and having a propellant charge igniter, the accelerator length is close to the length of the projectile body, and has an outer diameter equal to the inner diameter of the barrel. 2. The projectile according to claim 1, characterized in that the detonator is located in the rear or in front of the shell of the projectile. 3. The projectile according to claim 1, characterized in that a pyrotechnic charge expander, electrically connected to the trajectory-impact fuse, is placed along the axis of the fragmentation block of the finished striking elements.

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