EP2828609B1 - Fin-stabilized full-calibre practice projectile - Google Patents

Description

The invention relates to a ladder-stabilized full-caliber practice projectile which can be fired from a weapon barrel and which has a solid head part and a tubular tail body adjoining the head part on the rear side, the training projectile being provided peripherally with a sealing system.

Such a full-caliber practice bullet is from the document DE 10 2010034 333 A1 known. It is a large caliber, for example, from a tank cannon with the caliber 120 mm shootable training projectile. In contrast to comparable known full-caliber practice projectiles, which usually comprise a head part with an adjoining projectile casing and a shaft with fin assembly adjoining the projectile casing, the projectile casing itself is designed as a tubular fin body in the aforementioned training projectile, so that a separate shank may be omitted with attached fin assembly. The resulting at the launch of the practice projectile projectile charge gases reach in this full-caliber training projectile in the interior of the tubular tail body and act to accelerate the practice projectile on the rear-side portion of the headboard, which limits the interior geschosskopfseitig.

To ensure that when shooting down in the DE 10 2010 034 333 A1 disclosed training projectile no propellant gases between the inner wall of the gun barrel and the outer wall of the training projectile can flow past this, is about the outside of a known sealing system arranged in the rear third of the tubular portion of the tail body. This consists essentially of a in the outer surface of the tail body inserted annular groove, in which engages an existing plastic sealing ring.

When launching large-caliber practice bullets, a high internal pressure of the propellant charge gases occurs within the tubular tail body, which strongly acts on the side wall of the tubular tail body, in particular in the region between the sealing system and the head part. This can have an effect on the firing resistance, in particular when using a lighter body of a light metal.

The invention has for its object to provide a full-caliber practice bullet of the type mentioned, the firing resistance is ensured in a cost effective manner.

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 to dispense with a sealing system in the tubular portion of the tail body, so that the propellant gases formed at the launch of the training projectile also act on the outside of the side wall of the tubular tail body and thus acting on the outside of the tubular tail body pressure the counteracts the acting on the inside of the side wall of the training projectile internal pressure. To avoid an outside bypassing the propellant charge gases on the entire exercise floor within the gun barrel, a sealing system is arranged in the region of the massive head part of the exercise projectile, which comprises a sealing ring acted upon by a wedge ring. Both the axially displaceable wedge ring and the sealing ring are arranged in an annular region situated in the rear region of the head part or in a region of the tail body which overlaps the head part. In this case, arranged in the weft direction of the training projectile in front of the wedge ring sealing ring has a rear conical inner cavity into which the front portion of the wedge ring positively and positively engages, such that when an axial pressurization of the wedge ring this is moved axially and acting as a sealing lip outer Side wall portion of the conical inner cavity of the sealing ring radially presses against the inner wall of the gun barrel.

To ensure that the launch of the training projectile within the gun barrel, the outside of the tail body is acted upon by the propellant charge gases, it is provided that the tubular tail body spaced apart, knob-shaped guide elements, via which the tail body is supported on the gun barrel, wherein the knob-shaped guide elements form a guide ring arranged around the tail body, and wherein the propellant gases can flow between adjacent guide elements.

The sealing ring and / or the wedge ring consist / is preferably made of plastic.

Fig. 1

den Längsschnitt durch ein erfindungsgemäßes, aus einem Kopfteil und einem rohrförmigen Leitwerkskörper bestehenden Vollkaliber-Übungsgeschoss, wobei außenseitig an dem Kopfteil ein Dichtungssystem angeordnet ist;

Fig. 2

die vergrößerte Ansicht eines Querschnittes durch das in Fig. 1 dargestellte Übungsgeschoss entlang der dort mit II-II bezeichneten Schnittlinie und

Fig. 3

eine vergrößerte Ansicht des Kopfteiles des in Fig. 1 dargestellten Übungsgeschosses.

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

Fig. 1

the longitudinal section through an inventive, consisting of a head part and a tubular fin body full caliber training projectile, wherein on the outside of the head part, a sealing system is arranged;

Fig. 2

the enlarged view of a cross section through the in Fig. 1 illustrated training projectile along the there designated II-II section line and

Fig. 3

an enlarged view of the head part of in Fig. 1 shown exercise floor.

In Fig. 1 is denoted by 1 ein leitwerkstabilisiertes full-caliber practice bullet fired from a gun barrel, not shown. With the practice floor 1, a sleeve cover 2 is connected, which forms the compound of the training projectile 1 with a propellant charge, not shown, containing the propellant charge.

The training projectile 1 comprises a solid head part 3 with a trailing-side arranged tracer body receptacle 4 and a tailpiece body 5 adjoining the head part 3 at the rear.

According to the invention, the tubular tail body 5 is designed in such a way that the propellant gases produced during the launch of the training projectile 1 also act on the outside 6 of the side wall 7 of the tubular tail body 5.

For this purpose, the tail body 5 is formed unterkalibrig and is supported by spaced apart, knob-shaped guide elements 8 (FIG. Fig.2 ) on the inner wall of the gun barrel, not shown. The nub-shaped guide elements 8 are arranged around the tail body 5 such that they form a guide ring 9, wherein the propellant charge gases can flow between adjacent guide elements 8.

In order to avoid that the propellant charge gases within the gun barrel can flow past the entire training floor 1 on the outside, a sealing system 10 is arranged in the region of the solid head part 3 of the training projectile 1.

In this sealing system 10 engage, seen in the weft direction, front, for example made of plastic sealing ring 11 and a rear side the sealing ring 11 acted upon wedge ring 12, in a common annular groove 13 in the rear-side region of the head part 3 a. For the purpose of simple assembly, the annular groove 13 is bounded at the rear by the front end face of the tail body 5.

The sealing ring 11 has a rear conical inner cavity 14 (FIG. Fig. 3 ), in which the front portion of the wedge ring 12 positively and positively engages, such that upon axial pressurization of the wedge ring 12, this axially shifts towards Geschossspitze and acting as a sealing lip outer side wall portion 15 of the conical inner cavity 14 of the sealing ring 11 radially against the Inner wall of the gun barrel, not shown presses.

The sealing ring 11 can either be pressed or sprayed onto the head part 3 and then turned off to measure and / or drawn without twisting directly on the head part 3.

Of course, the invention is not limited to the embodiment described above. For example, the massive headboard does not necessarily have to be a solid body. Rather, it may also be a hollow body, if the wall thickness and / or the material (steel, etc.) of the head part are chosen such that the propellant charge gases cause no or no significant deformation of the head part when shooting in the barrel.

Furthermore, the annular groove of the sealing system need not necessarily be arranged on the head part itself, but it may also be provided that in a training projectile, in which the tail body engages over the front side of the head part (see also Fig. 1 ), the annular groove is arranged in this wall region of the tail body.

LIST OF REFERENCE NUMBERS

1

Full-caliber practice floor, training floor

2

casing cover

3

headboard

4

Tracer body shot

5

tail body

6

outside

7

Side wall

8th

guide element

9

guide ring

10

sealing system

11

sealing ring

12

wedge ring

13

ring groove

14

internal cavity

15

Sidewall region

Claims (3)

1. Fin-stabilized full-calibre practice projectile (1) that can be fired from a barrel of a weapon with a solid head part (3) and a tubular stabilizer body (5) adjoining the head part (3) at the rear, wherein the practice projectile (1) is provided with a peripheral sealing system (10), characterized by the features:

   a) the tubular stabilizer body (5) is designed such that the propellant gases arising when firing the practice projectile (1) also act on the outside (6) of the side wall (7) of the tubular stabilizer body (5),

   b) the sealing system (10) is disposed in the region of the head part (3) of the practice projectile (1), wherein the sealing system (10) comprises a sealing ring (11) that is acted upon at the rear by a wedge ring (12), and wherein the wedge ring (12) and the sealing ring (11) engage in a common annular groove (13) in the rear region of the head part (3) or in a region of the stabilizer body (5) overlapping the head part (3), and

   c) the sealing ring (11) comprises a conical internal cavity (14) at the rear, in which the front region of the wedge ring (12) engages in a force-fit and shape-fit manner, such that when the wedge ring (12) is subjected to an axial pressure the same is displaced axially and the outer side wall region (15) of the conical internal cavity (14) of the sealing ring (11) acting as a sealing lip presses radially against the inner wall of the barrel of the weapon.
2. Practice projectile according to Claim 1, characterized in that the tubular stabilizer body (5) comprises cup-shaped guide elements (8) that are spaced apart from each other and that form a guide ring (9) that is disposed around the stabilizer body (5).
3. Practice projectile according to Claim 1 or 2, characterized in that the sealing ring (11) and/or the wedge ring (12) is/are made of plastic.

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