DE1104878B - Explosive charge for grenades composed of individual charges of different detonation speeds - Google Patents

Description

GERMAN

The invention relates to one of two or more joined individual charges of different detonation velocities Existing explosive charge for grenades with locally greatly increased detonation speed. With a known grenade this one Type are single loads of. each higher explosive arranged one behind the other, so that the detonator initially one charge with a lower level of volatility ignites and the individual charges with increasing level of volatility one after the other be ignited.

This is mainly used for grenades of larger caliber and with high initial acceleration Arrangement is intended to eliminate the risk that the load as a result of the inertia caused hydrostatic pressure is caused to explode during launch.

In the case of the grenade according to the invention, the single charge with the lowest detonation speed is also the first ignited, but the invention aims at an increased energetic utilization of the explosives present in the grenade.

According to the invention there is an increase in the speed of propagation of the detonation waves achieved by the fact that the interface between the inputs * cell charges of low and high detonation speed is so far away from the ignition point that the Angle between interface and each line interface-ignition point is more than 30 ° and the intersection of the interface and the line extending from the ignition point is a distance of 25 to 43 ° / o des The inside diameter of the shell from the axis. The individual charge with a lower detonation velocity in the charge with a higher detonation velocity is expedient embedded, while the point of intersection is on the axis-parallel interface or in the Point of intersection of the axially parallel with the radial boundary surface lies. With consideration for the general spherical propagation of the detonation waves in the individual charges is advantageous Detonator used with a detonator cap that tapers into a hemispherical surface. Of this Real spherical waves run in the directly adjacent, slower explosive, for example SL with 3900 m / sec. The charge from this explosive is expediently in the form of a Rotation body around the axis through the primer. A ^ or preferably this body of revolution is in the as single charge with a higher detonation velocity, formed by a coaxial rotational body.

The interface between the individual charges with different detonation speeds runs at the arrangement according to the invention in such a way that a circular area of the interface of the detectors

From individual loads of different

D etonation speeds

compound explosive charge

for grenades

Applicant:

Baroness Ilyana von Thyssen-Bornemisza, Munich 23, Ohmstr. 6th

nation waves is reached in at least two different ways at the same time and the normals of the shaft components form an angle of at least 30 ° with one another. When the single charge is out slower explosive has a cylindrical outer surface, so finds in the arrangement-according to the invention a total reflection of the incoming waves takes place.

To illustrate the idea of the invention, the drawings show four exemplary embodiments of arrangements according to the invention. The figures represent schematic longitudinal sections through grenades represent.

Within the shell 1, a detonator 2 is arranged axially at the front end of the grenade. The explosion waves emanating from this and from the ignition charge 3 meet simultaneously in two different ways at a point V of the axial section at the interface between the slower single charge 6 and a single charge 4 made of a faster explosive, i.e. spatially in a circle. This enables the rapid explosive, such as RLX, to be initiated from two directions at the same time.

Behind the charge 4, in the interior of the grenade, a charge 5 of any type of explosive, z. B. Trotyl TNT, be housed.

The angle aVc with the vertex V between the normals α and c of the two waves is at least 30 °. This angle determines the highest occurring local speed of propagation of the waves. With RDX, with an optimal angle of about 60 °, a local velocity of

109 540/164

21,000 m / sec exceeded. At an angle of 90 °, hardly 15,000 m / sec is reached. At an angle of 30 ", 12,300 m / sec have been measured. Smaller ones Angles are hardly an option, as the arrangement then no longer serves its purpose.

The angle a formed by the line of intersection between two waves starting at the apex V of the angle aVc and the axis of the grenade determines how far the conically outwardly directed maximum speed propagation can be reflected inwards on the inside walls of the grenade, around the rear masses of explosives to reach.

The diameter of the circle through the vertices V on the interface between charges 3 and 4 is at least 50% of the internal diameter of the grenade, possibly up to 86% of this diameter.

Fig. 1 shows a longitudinal section through a shell of 50 to 60 mm caliber, which about two thirds of the total charge with TNT (charge 5) and about one sixth of the total charge with a faster explosive (charge 4), such as RDX or CPD.B , filled. The interface S between the two charges is plastered very smoothly. In the explosion, the paths of the detonation waves in the direction of the diagonal α and in the direction of the cathets b and c are equivalent in time, so that at point V there is a double initiation. The weakness of this embodiment is that the angle aVc is small - about 45 ° - and that the effect is directed outwards. The angle ο is less than 45 °, so that a satisfactory reflection through the shell walls could only be achieved with a rather blunt shell.

FIG. 2 shows a somewhat more complicated design, which is less sensitive with regard to the explosives and the shape of the grenade, but whose effect is not as good as that of the grenade according to FIG. 1 due to the less favorable angle aVc.

3 and 4 show embodiments which are particularly suitable for grenades of 87 mm and 120 mm caliber. Here the paths over the distances α and d and over the distances b and c are equivalent in time. At the end point of the diagonal e, which coincides with the point V , a total reflection occurs which is so intense that local propagation speeds of 20,000 m / sec can be exceeded.

Claims (2)

PATENT CLAIMS: 1. Explosive charge composed of individual charges of different detonation speeds for grenades with locally strongly increased detonation speed, the ignition taking place in the central axis of the single charge with the lowest detonation speed, characterized in that the interface between the charges of low and high detonation speed is so far away from the ignition point that the angle between the interface and each line interface-ignition point is more than 30 ° and the intersection of the interface and the line starting from the ignition point is at a distance of 25 to 43% of the internal diameter of the shell from the axis. 2. An explosive charge according to claim 1, characterized in that the charge with a lower detonation speed is embedded in the charge with a higher detonation speed and the point of intersection (V) lies on the axially parallel interface or at the intersection of the axially parallel with the radial interface. Considered publications:
German Patent No. 1,020,553;
Austrian patent specification No. 44 993. 1 sheet of drawings © 109 540/164 4.