DK2284474T3

DK2284474T3 - Vehicle and other object protection system

Info

Publication number: DK2284474T3
Application number: DK10007604.1T
Authority: DK
Inventors: Frank Hass
Original assignee: Rheinmetall Waffe Munition Gmbh
Priority date: 2009-08-11
Filing date: 2010-07-22
Publication date: 2018-06-06
Also published as: DE102009036956A1; EP2284474A2; EP2284474B1; NO2284474T3; EP2284474A3

Description

The invention concerns a protection device for protection against projectiles, ammunition and other missiles. It is the object of the concept of protection to cover a surface to be protected with many small plates, the fastening of which however is so unstable that a single plate is not penetrated when bombarded but is accelerated by the projectile. During this, the plate receives the kinetic energy transferred by the projectile and decelerates the projectile. Both are then captured by a second layer of plates or another conventional protection. During this, the protective plate can break, kink or tear, depending on the material. As a result, energy is converted.

During out-of-area operations, a number of light and medium armoured vehicles are used. The armour of said vehicles must be able to withstand different threats and nevertheless be as small as possible. Armour is preferred that is also used on smaller vehicles. The different threats also include EFP- Explosive Formed Projectiles. The EFP often penetrates conventional armour owing to the mass and speed thereof. For EFP that consists of individual projectiles, so-called “Monoslug EFP”, it is theoretically possible to provide effective protection by means of thicker armour. In the case of EFP that consists of a plurality of projectiles impacting successively on the same point, so-called “Multislug EFP”, protection of this type is not sufficient, because the projectile penetrates the armour at this point.

One of many protective claddings is to be found in DE 10 2007 026 545 Al. This can be reversibly integrated within a vehicle wall. DE 38 04 991 Cl concerns a device for the protection of active armour against attack by sensor-controlled antitank projectiles, wherein pressure-controlled and temperature-controlled inflatable individual segments are disposed on the object to be protected. The inflatable individual segment(s) is/are accommodated in a housing and comprise(s) a stalk-like spacer and a broad shield part with a surface.

The material used is a combination of highly elastic rubber-like film and tear-resistant, inelastic film, wherein the surface of the shield part and the strip-shaped stiffenings are formed by the tear-resistant and for example Kevlar-reinforced film. DE 10 2004 044 541 B4 proposes a compressed gas container and a ballistic-resistant casing for the same for use on an aircraft. The energy of motion of the projectile is absorbed by deformation of the casing and diverted in the peripheral direction, so that destruction of the container is prevented. The casing is spaced apart from the container.

Based on DE 3804991, it is the object of the invention to reveal a protective element or protective system, in particular for protection against Multislug EFP, which enables the use thereof on light and medium vehicles and other objects.

The object is achieved by the features of Claim 1. Advantageous embodiments are mentioned in the respective subordinate claims. The invention is based on the idea of covering a surface to be protected with many (small) plates etc., the fastening of which however is so unstable that an individual plate is not penetrated when bombarded (or impacted by a mine), but is accelerated by the projectile or the fragments (also of the mine). During this, the plate absorbs the kinetic energy transferred from the projectile and decelerates the projectile. Both are then captured by a second layer of plates or another conventional protection.

As a result, two important properties are fulfilled by the ballistic protection, the fragments are decelerated and the first fragment already sets the separated protective element in motion. It is important for the deceleration that the protective elements are not too heavy and not too stably supported or mounted, so that the kinetic energy of the fragments can be imparted to the protective elements. So that the first fragment can set the protective element(s) in motion, it is also important that the support for the protective elements can build up very small reaction forces. The protective elements are high strength plates, preferably of composite material, such as Dyneema etc. Organic material, such as for example bio-concrete (corn-based) can also be used. Said plates are placed for example in a rubber bladder that is inflated with compressed air or similar. The basic principle of the concept of protection is thus the mounting of the protective plates in a rubber bladder per protective plate that is filled with air etc. The rubber bladder filled with (compressed) air has a stable shape and supports the protective plate.

The rubber bladder can be assembled with other rubber bladders (as long as they are under excess pressure). Alternatively, said means can be made to be fully combined with the rubber bladder, for example as rubber elements. Rubber bladders with protective plates disposed side-by-side and one above the other produce a (protected) surface. In a plurality of levels, rubber bladders disposed one after the other and preferably offset enable 100 % protective cover in a continuation of the invention.

If an EFP fragment impacts a surface that is protected in this way, the rubber bladder that is struck first will burst. This results in the associated protective plate no longer being supported. Only the own inertia thereof now holds the plate in position for a short time. The protective plate is accelerated by the fragment, because no reaction forces are built up by a support. As a result, subsequent fragments of a Multislug EFP can inevitably not impact on the same point but on another point of the moving or displaced plate.

The weight of the protective elements is very low at 12 kg/m2 per layer. As the interface to the hull of the vehicle or another object, in this case a lighter frame of aluminium sheets would be sufficient.

Using an exemplary embodiment with a drawing, the invention will be described in detail. In the figures:

Fig. 1 shows an AMPA protective element,

Fig. 2 shows the protective element of Fig. 1 with a transparent rubber bladder and an inner protective plate,

Fig. 3 shows a sectioned protective element from Fig. 2,

Fig. 4 shows a possible protective structure with the protective elements of Fig. 1 or Fig. 2,

Fig. 5 shows a further type of representation (from the side or the top) of the protective plates.

In Fig. 1 an AMPA (Air Mounted Protection Array) of protective elements 1 is shown that comprises a type of rubber bladder 2 as a housing (Fig. 2), in which a protective plate 3 (Fig. 3) is accommodated and supported. A plurality of protective elements 1 can for their part be combined to form a protective system 10 (Fig. 3) or similar. Owing to the rubber bladders 2, the protective plates 3 are supported in an unstable manner, so that no reaction forces caused by a solid support are built up and only the inertia of the individual plates 3 has to be overcome.

Each individual protective plate 3, consisting of a composite fibre material, is preferably accommodated in a rubber bladder 2 that is filled with air for example and that is under excess pressure. The rubber bladder 2 holds the protective plate 3 and by means of suitably shaped means, such as protrusions 5 and grooves 6, enables the assembly of a plurality of protective elements 1 in a plurality of (protective) layers 7, 8. In this case, the layers 7, 8 are preferably disposed offset, so that there are no ballistic "holes". Alternatively or even additionally, hook and loop strips or similar can be used for connecting elements together if required.

For the assembly of the rubber bladders 2, the shaped means 5, 6 are filled with air and the assembly is carried out under excess pressure. Solid rubber-like or similar means with a similar shape to the shaped means 5, 6 formed on the side (also on the front and rear) of the rubber bladder 2 provide an alternative, for example.

The individual protective elements 1 are each provided with a conventional air valve and are filled separately. The material of the rubber bladder 2 must absorb the loads in driving mode without employment, but when bombarded must burst suddenly. A thin-walled structure of wear-resistant, elastic material is therefore preferably provided.

Once the first fragment of for example a Multislug EFP that is not shown in detail impacts on the rubber bladder 2, the bladder bursts. The associated protective plate 3 is no longer held in the system 10 and can fall to earth. But before this, the impacting fragment reaches the still free-floating protective plate 3 and accelerates the plate, wherein the fragment is decelerated. At least some of the subsequent fragments impact on the same protective plate 3, but at different points. Uncollected fragments are at least stopped by the subsequent layer 8. A further view is shown in Fig. 5. Mounting plates (additional or the own wall of the vehicle) are denoted by 20, to which the AMPA 1 are attached. The type of attachment - for example clamping the AMPA 1 between two protrusions 21, 22 -can be individually customized. It should only be observed that the rubber bladders are not already damaged during attachment.

Claims

A protective element (1) having at least one protective plate (3), wherein the protective element (1) comprises a rubber bracket (2) as housing in which the protective plate (3) is received, respectively. integrated and camped.

Protective element (1) according to claim 1, characterized in that the protective plates (3) are high tensile plates consisting of fiber composite or organic material such as bio-concrete.

Protective element (1) according to claim 1 or 2, characterized in that the rubber bladder (2) is filled with air or the like.

Protective element according to one of claims 1 to 3, characterized in that the rubber bladder (2) consists of a wear-resistant and elastic material.

Protective element according to one of claims 1 to 4, characterized in that the rubber blisters (2) are provided with at least one air valve and filled separately.

Protective element according to claim 5, characterized in that an overpressure is set for the filling.

Protective element (1) according to claim 6, characterized in that the overpressure in the rubber bladder (2) is at approx. 1-2 bar.

Protection system (10), comprising several protective elements (1) according to one of claims 1 to 7.

Protection system (10) according to claim 8, characterized in that the composition of several protective elements (1) side by side and in several layers (7, 8) is made possible by means of similarly designed means (5, 6), such as noses (5). and notes (6).

Protection system (10) according to claim 9, characterized in that the means (5, 6) are formed in the rubber bladder (2) or formed on it.

Protective system (10) according to one of claims 8 to 10, characterized in that each protective element (1) is provided with a conventional air valve and is filled separately.

Protection system (10) according to one of claims 9 to 11, characterized in that the layers (7, 8) are displaced.

Protection system (10) according to one of claims 8 to 12 for protection against shelling, mines or multislug EFP.

A vehicle with a protective element (1) according to one of claims 1 to 7, respectively. a protection system (10) according to any one of claims 8 to 13.

Vehicle according to claim 14, characterized in that the protective elements (1) are fixed on protective plates (20) or on the vehicle's own wall.