RU2492416C1 - High-explosive ammunition - Google Patents

Abstract

FIELD: weapons and ammunition.

SUBSTANCE: high-explosive ammunition comprises a body, a detonating fuse, the main charge of high-energy explosive with lower detonation speed and an additional charge of powerful explosive with high speed of detonation. The additional charge is made in the form of extended cord charges, evenly arranged on the inner surface of the ammunition body along its axis. On the inner surface of the body there are helical slots. Extended cord charges are placed in these slots.

EFFECT: increased efficiency of ammunition high-explosive action.

2 cl, 3 dwg

Description

Technical field

The invention relates to defense equipment and can be used in various high-explosive fragmentation munitions (OFBP), designed to hit targets with fragments and high-explosive action.

State of the art

A well-known technical solution [1] proposes an OFBP containing a body, fuse, the main charge of a high-energy explosive (BB) with a low detonation velocity and an additional charge of a powerful explosive with a high detonation speed. On the lateral surface of the additional charge, cumulative recesses are made along its entire length, formed by radial rays with a beam thickness greater than the critical detonation diameter, while the main charge is located in the volume of cumulative recesses, and the number of cumulative recesses is N≥4. When the device is triggered in cumulative recesses, detonation of the main charge is excited in an overcompressed mode with the formation of Mach detonation waves and high-speed jets of detonation products (PD) flying into the air after the destruction of the body.

Common features with the proposed OFBP are the presence of a destructible body, fuse, primary and secondary charges with different detonation speeds.

The implementation of this technical solution leads to a number of advantages, however, with an increase in the thickness of the case, these advantages begin to level out. Indeed, in an OPF with a thick and strong body (for example, a projectile), the destruction of the latter when the detonation wave (DV) exits on its inner surface can be delayed so much that the pressure in the primary and secondary charges will have time to equalize, and then the jet expansion of high-speed PD (main advantage) becomes problematic.

Another well-known close technical solution [2], adopted as a prototype, proposes an OFBP containing a body, fuse, the main charge of a high-energy explosive with a low detonation speed and an additional charge of a powerful explosive with a high detonation speed. The additional charge is made in the form of elongated cord charges (SH) in the amount of N≥4, evenly placed on the inner surface of the shell of the munition along its axis. The linear mass of the SHZ is in the range (0.5 ... 2.0) ρ _d h ² , where ρ _d is the density of the additional charge, h is the thickness of the shell of the ammunition.

SHZ can be made of detonation cords of rectangular cross section with a ratio of height to width H / b = 0.1 ... 0.5 and placed on the inner surface of the body with its wide face. In addition, an additional intermediate charge made of a high-sheen condensed explosive can be installed along the axis of the housing in the OFBP.

Common features with the proposed OFBP are the presence of a body, fuse, the main charge of a high-energy explosive with a low detonation speed and an additional charge of a powerful explosive with a high detonation speed, made in the form of elongated SCs that are evenly placed on the inner surface of the PSU along its axis.

Known OFBP [2] works as follows.

At the command of the fuse, long elongated short-throwers are initiated. As a result of this, a shock wave (shock wave) is formed in the main explosive charge and explosive loading of the PSU case at the points of contact with additional charges. The collapse of the shock wave on the axis of symmetry leads to the initiation of detonation of the main charge or to the initiation of an intermediate additional charge located on the axis of symmetry of the BP. Extra charge can also be triggered by a fuse. The resulting DW propagates from the axis of symmetry to the PSU case, loads it, crushes and throws it at a high initial speed, and through the cracks in the case knocked out by elongated SCs, high-velocity PDs flow out, which leads to an increase in the high-explosive effect of the explosion in the radial direction.

However, as the results of calculations and experiments show, even in this case, not all of the energy of the main explosive charge (assumed to be thermobaric) is transferred to the airborne hydrocarbon. A sufficiently large part (up to 50%) remains in the PD of the main charge, since the PD could not mix in time and react with the surrounding air.

Disclosure of invention

The solved problem of the present invention is to increase the efficiency of the high-explosive action of the PSU by additional turbulization of flying PD.

This problem is solved by the fact that in the known technical device containing a housing, fuse, the main charge of a high-energy explosive with a low detonation velocity and an additional charge of a powerful explosive with a high detonation velocity, made in the form of elongated ballasts, evenly placed on the inner surface of the munition shell along its axis , screw grooves are made on the inner surface of the housing, while elongated SHZs are placed in these grooves.

An OFBP design is possible, in which the screw grooves are made with an angle of rotation along the axis of the housing of at least 360 / N degrees, where N≥4 is the number of SHZ.

List of drawings

Figure 1 - axial section of the housing;

Figure 2 is an axial section of OFBP;

Figure 3 - radial section OFBP with six elongated SHZ.

The implementation of the invention

In the drawings, the numbers indicate:

1 - PSU case;

2 - screw grooves;

3 - additional explosive charge in the form of elongated SHZ;

4 - the main explosive charge;

5 - PV additional charge;

6 - PV of the main charge;

7 - the position of the front of the DW in the main charge at an arbitrary point in time.

Implementation OFBP on the proposed technical solution (Figure 2) allows you to realize the advantages inherent in the prototype, including for very thick cases.

Indeed, upon initiation of detonation of elongated BH 3 from the fuse, placed in screw grooves 2 on the inner surface of the PSU 1 body (Figure 1), DV 7 are formed in the array of the main explosive charge 4 extending to the BP axis of symmetry.

The linear mass of the SHZ is selected from the condition of reliable initiation of the main charge and destruction of the PS case during a contact explosion in grooves 2. It depends on the detonation parameters of the SH, thickness over the grooves and strength characteristics of the PS case, density and sensitivity of the main charge.

When the DV 7 moves to the BP symmetry axis (Figure 3), the parameters at the front begin to increase and reach large values at the moment of collapse on the symmetry axis. In this case, reflected shock waves with increased parameters at the front will propagate from the axis of symmetry in the opposite direction along shock-compressed PD 6 of the main charge. During the travel time of the DW 7 to the axis and the backward movement of the shock wave to the inner surface of the body, the thick body in the grooves 2 will be destroyed by the knock-out mechanism and the PD 5 will begin to leak an additional charge through the cracks formed. Additional loading, acceleration and destruction of the housing 1 into fragments will provide reflected from the center of the shock wave. In this case, through the knocked openings in the housing, the jet expiration of high-speed flows of PD 6 of the main charge begins, as in the prototype. But, due to the helical twisting of the grooves, inside the PD 6 of the main charge, at the similar points of two close normal sections, a peripheral velocity component appears, which will provide PD 6 with additional turbulization during their free movement after the shell is destroyed. In turn, turbulization promotes intensive mixing of aerodispersed (metal-containing) PD 6 with ambient air, their rapid combustion, and timely transfer of released energy to the airborne hydrocarbon, which will lead to a decrease in energy losses and an increase in the high explosive effect of the PSU as a whole.

It is clear that the influence of the screw twist can be noticeable only if it is sufficiently large (the magnitude of the peripheral speed will be noticeable). The analysis shows that as the lower limit of the magnitude of the twist of the screw grooves along the length of the PSU, you can specify the value 2π / N, and the upper - 2π, where N≥4 is the number of SHZ. In this case, the swirling jets of the PD of the main charge completely cover the entire surrounding space around the circumference of the PS.

The proposed OFBP works as follows.

At the command of the fuse, long elongated short-throwers are initiated. As a result of this, the formation of the DW in the main explosive charge and the explosive loading of the PSU case in screw grooves with elongated SCs occur. After reflection from the axis of symmetry, reflected hydrocarbons propagate to the BP case, which load it, finish it and throw at a high initial speed, and through the cracks in the case, knocked out by elongated SCs, there is a jet outflow of high-speed PD. Due to the helical twisting of the grooves, additional turbulence of the PD of the main charge takes place, they are intensively mixed with the surrounding air and burning, an increase in the amount of released energy transferred to the airborne hydrocarbon, which leads to an increase in the high-explosive effect of the OFBP explosion.

Information sources

1. Patent RU 2341760 dated 03/29/2006, F42B 12/20. High-explosive fragmentation ammunition according to the "Star" scheme.

2. Patent RU 2413921 dated November 20, 2009, F42B 12/20. High-explosive fragmentation ammunition.

Claims (2)

1. High-explosive fragmentation munition containing a shell, fuse, the main charge of a high-energy explosive with a low detonation speed and an additional charge of a powerful explosive with a high detonation speed, made in the form of elongated cord charges uniformly placed on the inner surface of the munition shell along its axis, characterized in that on the inner surface of the housing there are screw grooves, while elongated cord charges are placed in these grooves. 2. High-explosive fragmentation munition according to claim 1, characterized in that the helical grooves are made with an angle of rotation along the axis of the casing lying in the range 2π / N ... 2π, where N≥4 is the number of cord charges.

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