RU2693207C1 - Device for forming high-speed elongated fluted element, including self-winding element - Google Patents

Abstract

FIELD: military equipment.

SUBSTANCE: invention relates to defense equipment and can be used in various cumulative ammunition (CA) intended for hitting targets by high-speed striking elements (SE). Device consists of a fuse, a body with an explosive charge enclosed therein and having a recess coated with a metal lining of a combined shape, and an initiation device with an annular arrangement of initiation points on the charge end face. Metal lining has a spheroconical shape, and the initiation points on the charge end face are located on one or several circles with a radius smaller than the charge radius. Position of the initiation points on the charge end face is set by radii of the enclosed circles, counting from the end face centre, with their simultaneous initiation. Position of the initiation points on the charge end is set by an arbitrary curve, for example, a spiral, counting from the centre of the end face. Position of the initiation points at the charge end is set by an arbitrary curve, for example, a spiral, wherein initiation of detonation of the charge at the initiation points occurs with a time delay, counting from the centre of the end.

EFFECT: invention allows forming a self-winding high-speed elongated element.

4 cl, 4 dwg

Description

Technical field

The invention relates to defense technology and can be used in various cumulative ammunition (PCU), designed to destroy targets with high-speed striking elements (PE).

The level of technology

There are a large number of CBP designs that form high-speed PE of various shapes during an explosion. The main elements of these structures are the body, the explosive charge (BB), the cumulative lining and the fuse.

One of the main problems that have to be addressed when developing a new design of the PCU is the problem of increasing the stability of the flight of the formed PE to the target. To solve this problem, various constructive approaches are used, among which the main one is the formation of stabilizing elements (skirts) in PE in the tail section, which is especially important for elongated PE.

From this point of view, we analyze some similar technical solutions.

Known technical solution [1], adopted as a counterpart.

The problem to which the invention is directed [1] is to form in the explosive charge the necessary profile of the detonation wave (DW), which coincides with the profile of the cumulative lining.

The technical result [1] is an increase in armor penetration due to an increase in the kinetic energy of PE, provided by the generated DV profile in the explosive charge due to its multipoint initiation.

The known device for forming PE consists of a body in which an explosive charge with a sphere-like lining is placed, the source of initiation. The device differs in that the DV shaper is made in the form of a layer of inert material. On the outer surface of the layer there are channels filled with plastic explosives and connecting the initiation source with end initiating elements in contact with the explosive charge. The length of each channel from the initiation source to the explosive charge is made in accordance with the required DV profile according to the formula given.

Unfortunately, in [1] nothing is said about the form of the resulting high-speed PE and its stability in flight, but it is only reported that “computational and experimental studies of the described device showed an increase in the kinetic energy of PE by 20–40% compared to the device with single-point initiation , which provides an increase in armor penetration. "

There is another device [2], adopted as a prototype, for throwing the Mach's Far East, consisting of an explosive charge, a steel lining of a cumulative cylinder-spherical excavation, a metal case containing an explosive charge, a detonation wiring on the end or side surface of the charge.

According to the invention, explosive charge is undermined by multipoint detonation wiring along a peripheral annular surface. When a falling DV collides, a Mach axis DV is formed, the diameter of which is not less than 0.52–0.53d, where d is the internal diameter of the hemispherical part of the lining. The pressure in the Mach Far East is significantly higher than behind the front of the falling stationary Far East. This phenomenon is used to increase the speed of throwing a compact element.

Since a compact element is formed in this technical device, there is no need to talk about its stability in flight. However, in [2] there are many elements that are present in the present invention.

DISCLOSURE OF INVENTION

Solved by the present invention is the formation of high-speed elongated feathered element, including self-rotating.

This problem is solved by the fact that in a known technical device consisting of a fuse, a body with an explosive charge enclosed in it with a notch covered with a metal lining of a combined form, and an initiating device with an annular arrangement of initiation points at the charge end, the metal lining has a spheroconical shape, and the points of initiation at the end of the charge are located on one or several circles with a radius smaller than the radius of the charge.

A possible variant of the device, in which the position of the points of initiation at the end of the charge is given along the radii of the enclosed circles, counting from the center of the end, while they are simultaneously initiated.

A possible variant of the device, in which the position of the points of initiation at the end of the charge is given by an arbitrary curve, for example, a spiral, counting from the center of the end, also with their simultaneous initiation.

A variant of the device is possible in which the position of the initiation points at the charge end is given by an arbitrary curve, for example, a spiral, while the initiation of charge detonation at the initiation points occurs with a time delay, counting from the center of the end face.

List of drawings

FIG. 1 - device design;

FIG. 2 - facing profile;

FIG. 3 - options for placing points of the system of multipoint initiation (media) and the introduction of asymmetry in their position to obtain self-twisting PE;

FIG. 4 - form self-twisting PE.

The implementation of the invention

Here the numbers and letters denote:

1 - facing;

2 - housing;

3 - fuse;

4 - explosive charge;

5 - inert plate with channels filled with explosives;

6, 7, 8 are radial straight lines defining the positions of the initiation points on the enclosed circles at the end of the explosive charge.

D _charge - the diameter of the charge;

N _charge - the length of the charge;

δ ₁ - the thickness of the lining in the center;

δ ₃ - the thickness of the cladding at the end of the conical surface;

R ₁ is the radius of the internal spherical surface;

R ₂ is the radius of the outer spherical surface;

r _p is the radius of transition of a spherical surface into a conical one;

L is the length of PE;

d is the diameter of PE;

V - PE velocity;

ΔT is the time delay of initiation of the points of initiation;

Y is the dynamic yield strength of the cladding material.

FIG. 1 shows the design of the device, consisting of a metal lining of spheroconic form 1, body 2, fuse (or detonator) 3, charge BB 4 and an inert plate with channels 5 filled with explosives.

FIG. 2 shows the profile of the lining 1 of the spheroconic form; FIG. 3 - options for placing the points of initiation and the introduction of asymmetry in their position to obtain self-twisting in-flight PE, and in Figure 4 - the shape of the obtained self-twisting PE.

The choice of the spheroconical lining (Figs. 1, 2) is explained by the fact that during the explosive compression of the lining, its conical part is crimped with loss of stability, i.e. with the formation of corrugations, which can be deformed into tail, stabilizing PE in flight. For this, the explosive charge media is used, which can be performed, for example, like [1] in the form of an inert plate 5 with channels on the outer surface and inside, filled with explosives and connecting the fuse with end initiating elements in contact with the explosive charge. The length of each channel from the fuse to the explosive charge must be the same when the charge is initiated at all points simultaneously.

The following media were investigated:

- 3-point small radius (Fig. 3, a);

- 3-point larger radius;

- 6-point small radius (Fig. 3, b);

- 6-point with internal asymmetry (Fig. 3, c);

- 19-point 3-way spiral (Fig. 3, d);

- 25-point 4-ray normal.

The main difference of the proposed technical solution from the prototype is the initiation of the explosive charge at points on the end of the charge located on one or several nested circles with a radius smaller than the radius of the charge, which allows from the very beginning to set the preferred directions of movement of the DW inside the explosive charge along straight lines parallel to the axis charge. At opposite ends of these straight lines there are points on the outer surface of the lining, to which LW will come out earlier, therefore, explosive acceleration of the indicated points will start earlier and later at the other lining points. As a result, when the facing is collapsed to the charge axis, the indicated facing points gain greater speed and move further to the charge axis, forming depressions in the tail section of the skirt, and from the intermediate facing points between them (having a lower speed and less advanced ones), corrugations are formed.

Indeed, studies have shown that in the case of single-point initiation, due to the loss of stability of the conical lining, a tail skirt is formed with four double stabilizers.

With an increase in the number of initiation points to three, located on a circle of relatively small radius (Fig. 3, a), PE is formed with a massive head part and three stabilizers.

With an increase in the radius of the circle on which the points of initiation are located, the formation of a more elongated PE occurs.

With a further increase in the number of points to six, evenly spaced around a circle of relatively small radius (Fig. 3, b), the formation of already six stabilizers on PE occurs.

Interesting results are obtained with the introduction of a small asymmetry at the positions of the points of initiation. So, in FIG. 3, in this asymmetry is achieved by turning the inner circle with the points of initiation at a small angle (or by turning the outer circle in the opposite direction at the same angle). As a result, three groups of two close points of initiation are formed, which leads to a new quality - the formation of a self-rotating PE in flight with three stabilizers (according to the number of groups, Fig. 4), each of which is turned relative to the PE axis at a small angle ( in this case ~ 10 °). Thus, the introduction of some asymmetry by rotating the nested circles with the points of initiation relative to the center led to a corresponding rotation of the three stabilizers formed relative to the PE axis at a small angle.

The same approach is used for a larger number of nested circles, where asymmetry is introduced by means of successive rotation of circles with points of initiation through a certain angle, counting from the center. This can be used to obtain any curve connecting the points of initiation, for example, a spiral (see Fig. 3, d). As a result, for the media of explosive charge - 19-point 3-way spiral, we will have PE self-rotating in flight with three stabilizers rotated at an angle of ~ 12 ° relative to PE axis. If at the same time for cladding choose steel with a different value of Y, then you can get PE of various relative elongation, up to a value of ~ 7.

Finally, studies have shown that if during the explosive formation of PE, the initiation points are “turned on” with some time delay ΔT, counting from the center of the charge end, for the last two media outlets, with the delay along the rays being constant and equal to 0.5 µs in the spiral scheme, for the second normal scheme - it changed during the transition from point to point, counting from the center, as a result of the same device with the same parameters, but different media, you can get two PEs of close relative elongation, but with different speeds mi

The proposed technical device works as follows.

When using the fuse 3, usually located in the center of the end of the housing 2, the DW is diluted in channels filled with explosives on an inert plate 5 in accordance with the selected media and reaches the end sections of the channels in contact with the explosive charge 4. As a result, in charge 4 at the points of contact the detonation process begins, propagating in the explosive charge over hemispherical surfaces from each point of initiation. The leading point on the front of the DW from any point of initiation moves in a straight line parallel to the axis of the device, and therefore, the end point of the straight line ending on the outer surface of the lining 1 starts to be thrown by the detonation products. Due to the curvature of the lining, under the action of high pressure from the detonation products lining 1 starts a directional movement to the axis of the device (collapses), but with different speeds at different points of the lining due to the difference in time of the arrival of the front of the Far-Eastern Department in them. The consequence of this is the formation on the conical part of the collapsing lining of intermittent depressions and corrugations, of which in the process of further deformation stabilizers are formed, providing the extended PE stability in flight.

Depending on the media selected, the obtained elongated feathered PE can be given the property of self-twisting in flight for its better stabilization.

Information sources:

1. Patent RU 2169897, Device for the formation of the striking element, F42B 1/02, F42B 3/00, 09.09.1999.

2. Patent RU 2309367, Method and device for the formation of a compact element, F42B 1/02, 07.11.2005.

Claims (4)

1. A device for forming a high-speed elongated feathered element, including a self-screwing device consisting of a fuse, a body with an explosive charge enclosed in it with a notch covered with a metal lining of a combined form, and an initiating device with an annular arrangement of initiation points at the end of the charge, distinguished by that the metal lining has a spheroconical shape, and the points of initiation at the end of the charge are located on one or several circles with a radius smaller than usa charge. 2. The device according to claim 1, characterized in that the position of the points of initiation at the end of the charge is given by the radii of the enclosed circles, counting from the center of the end, while simultaneously initiating them. 3. The device according to PP. 1, 2, characterized in that the position of the initiation points at the end of the charge is given by an arbitrary curve, such as a spiral, counting from the center of the end. 4. The device according to claim 1, characterized in that the position of the points of initiation at the end of the charge is given by an arbitrary curve, such as a spiral, while the initiation of charge detonation at the points of initiation occurs with a time delay, counting from the center of the end.

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