DE102012000011A1 - Spin-stabilized explosive projectile - Google Patents

Abstract

The invention relates to a spin-stabilized explosive projectile (1) with a projectile casing (2) whose interior (3) is filled with an insensitive explosive charge (4), wherein to avoid contact of the explosive charge (4) with the projectile casing (2) between the projectile casing (2) and the explosive charge (4) is disposed of a resilient material charge envelope (5-5 '' ') is arranged. In order to prevent such an explosive projectile (1) from cracking the explosive charge (4) in the region of the central longitudinal axis (100) of the projectile (1) when it is launched, the invention proposes that within the charge envelope (5) 5 '' ') to provide a in the direction of the central longitudinal axis (100) extending separating web (7-7' '').

Description

The invention relates to a device for preventing cracks in explosive charges in spin-stabilized explosive projectiles with a projectile casing whose interior is filled with an insensitive explosive charge, wherein to avoid contact of the explosive charge with the projectile casing between the projectile casing and the explosive charge consisting of an elastic material charge envelope is arranged.

Such explosive projectiles are among others from the publications EP 1 338 860 B1 or DE 10 2006 034 891 A1 and DE 10 2009 022 495 A1 known. In this case, for example, initially the existing example of an elastic plastic cargo envelope (hereinafter referred to as a liner) introduced through the mouth of a corresponding artillery projectile into the interior of the projectile casing and then poured the insensitive explosive charge in the liner and then polymerized. Among other things, the liner has the task of preventing the occurrence of thermal stresses due to the different expansion coefficients of the explosive charge and the projectile casing material.

A problem has been found that in spin stabilized artillery projectiles due to the high speeds centrifugal forces act on the explosive charge, which pull them apart laterally. This can cause longitudinal cracks in the region of the central axis of the explosive charge. Due to the vibrations and impacts acting on the latter during the passage of the corresponding explosive projectile, the explosive crystals "open" in the region of the cracks can then rub against one another, so that the explosive charge begins to burn locally and the explosive charge can not detonate properly.

The invention has for its object to provide a spin stabilized explosive projectile of the type mentioned above, are avoided in the formation of cracks of the explosive charge in the region of the central longitudinal axis in the intended use of the projectile.

This object is achieved by the features of claim 1. Further, particularly advantageous embodiments of the invention disclose the dependent claims.

The invention is essentially based on the idea of providing a centrally disposed separating web extending in the longitudinal direction of the explosive projectile within the liner. The insertion of such a separating web results in a defined separation area, such that when a corresponding spin-stabilized projectile is fired, the explosive charge can move outward without cracking due to the centrifugal forces acting on it and a counter-rubbing of "open" explosive crystals is avoided.

It is particularly simple to produce an explosive projectile according to the invention if the dividing web is a non-positively connected part with the liner, which consists of the same material (for example a film of an elastic plastic) as the liner.

However, the separating web can also be a double web, which comprises two partial webs arranged parallel to one another and extending in each case in the axial direction of the explosive projectile.

In a further preferred embodiment of the invention, the two partial webs of the double web are laterally spaced such that chambers are formed, which are filled with a gas or a liquid.

The liner may also consist of two separate, extending in the axial direction of the partial sheaths, such that the facing wall portions of the two partial shells either directly form the divider or abut both sides of an additional, plate-shaped web portion.

Further details and advantages of the invention will become apparent from the following, with reference to figures explained embodiments. Show it:

1 the longitudinal section through an inventive artillery explosive projectile with a liner having a centrally disposed divider;

2 a schematic representation of the in 1 with the reference number 5 designated liner with centrally arranged divider;

3 the schematic representation of a liner with a centrally arranged double web;

4 the schematic representation of a liner with a double web, which comprises a plurality of each filled with a gas or a liquid chambers, and

5 the schematic representation of a liner, which consists of two separate, extending in the axial direction partial sheaths.

In 1 is with 1 a spin stabilized explosive projectile refers to which is a projectile shell 2 has, whose interior 3 with a insensitive explosive charge 4 is filled. To avoid contact of the explosive charge 4 with the projectile shell 2 is between the projectile shell 2 and the explosive charge 4 a charge cover made of an elastic plastic film (liner) 5 arranged. The front side is the explosive projectile 1 with a lifting cap screw 6 closed, which is replaced in the event of combat by a head fuse.

According to the invention, it is now provided that inside the liner 5 one in the direction of the longitudinal axis 100 of the explosive projectile 1 extending central divider 7 is arranged. This divider 7 also consists of an elastic plastic film and is preferably non-positively connected to the liner 5 connected.

In 2 are for better clarity again only the corresponding liner 5 with integrated divider 7 shown.

3 shows the embodiment of a liner 5 ' with divider 7 ' in which the divider 7 ' is formed as a double web and two mutually parallel, each in the direction of the longitudinal axis 100 of the explosive projectile 1 extending partial webs 8th . 9 includes.

4 shows the further embodiment of a liner 5 '' in which the two partial webs 8th . 9 a double bridge 7 '' are laterally spaced such that by transverse webs 10 separated chambers 11 are formed, which are filled with a gas or a liquid.

Finally, in 5 the embodiment of a liner 5 ''' removable, consisting of two separate, extending in the axial direction partial sheaths 12 . 13 consists. In this case, the mutually facing wall areas 14 . 15 the two partial sheaths 12 . 13 either directly a divider 7 ''' form or on both sides of an additional, plate-shaped web portion (not shown) abut.

LIST OF REFERENCE NUMBERS

1

Explosive projectile, projectile

2

projectile casing

3

inner space

4

explosive charge

5, 5 ', 5' ', 5' ''

Cargo covers, liners

6

Lifting ring screw plug

7, 7 '

dividers

7 ''

Divider, double bar

7 '' '

divider

8, 9

partial webs

10

crosspiece

11

chamber

12, 13

secondary covers

14, 15

wall areas

100

longitudinal axis

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 1338860 B1 [0002]
• DE 102006034891 A1 [0002]
• DE 102009022495 A1 [0002]

Claims (6)

Explosive projectile with a projectile shell ( 2 ) whose interior ( 3 ) with an insensitive explosive charge ( 4 ) is filled, to avoid contact of the explosive charge ( 4 ) with the projectile casing ( 2 ) between the projectile casing ( 2 ) and the explosive charge ( 4 ) consists of an elastic material charge envelope ( 5 - 5 ''' ), characterized in that within the charge envelope ( 5 - 5 ''' ) in the direction of the central longitudinal axis ( 100 ) of the explosive projectile ( 1 ) extending separating web ( 7 - 7 ''' ) is arranged. Explosive projectile according to claim 1, characterized in that it is at the separating web ( 7 ) around with the cargo envelope ( 5 ) frictionally connected part acts. Explosive projectile according to claim 1 or 2, characterized in that the separating web ( 7 '; 7 '' ) is formed as a double web, the two mutually parallel, each in the direction of the longitudinal axis ( 100 ) of the explosive projectile ( 1 ) extending partial webs ( 8th . 9 ). Explosive projectile according to claim 3, characterized in that the two partial webs ( 8th . 9 ) of the double bridge ( 7 '' ) are laterally spaced such that by transverse webs ( 10 ) separate chambers ( 11 ) are formed, which are filled with a gas or a liquid. Explosive projectile according to claim 3, characterized in that the charge envelope ( 5 ''' ) of two separate, axially extending partial sheaths ( 12 . 13 ), such that the mutually facing wall areas ( 14 . 15 ) of the two partial sheaths ( 12 . 13 ) either directly a divider ( 7 ''' ) or abut on both sides on an additional, plate-shaped web portion. Explosive projectile according to one of claims 1 to 5, characterized in that the charge envelope ( 5 - 5 ''' ) and / or the separating web ( 7 - 7 ''' ) consist of an elastic plastic.

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