DE102012005742A1 - Tail stabilized full caliber training projectile - Google Patents

Abstract

In order to ensure the impact resistance of a full-caliber training projectile (1) comprising a solid head part (3) and a tubular tail body (5) adjoining the head part (3) at a low cost, the invention proposes that the tail body (5 ) in such a way that the firing charge gases formed during the launching of the training projectile (1) also act on the outer side (6) of the side wall (7) of the tubular tail body (5). To avoid an outside passing the propellant charge gases on the training projectile (1) within the gun barrel, a piston ring seal (10) in the region of the head part (3) is arranged, wherein a radially displaceable sealing ring (11) in an annular groove (12) in the rear-side region of the head part (3) intervenes. In this case, the groove bottom (15) of the annular groove (12) is connected via a plurality of essentially radial bores (16) to at least one axially extending recess (17) of the head part (3), which at the front end (18) of the head part (3). opens, which limits the interior (19) of the tail body (5) bullet head side.

Description

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

Such a full-caliber practice bullet is from the document DE 10 2010 034 33 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 region of the headboard, which limits the interior geschosskopfseitig.

To ensure that when shooting down in the DE 10 2010 034 33 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 recessed into the outer surface of the tail body annular groove into 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 charge is achieved by the features of claim 1. Further, particularly advantageous embodiments of the invention disclose the dependent claims.

The invention is based essentially on the idea to dispense with a sealing system in the tubular portion of the tail body, so that the firing charge 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 training projectile within the gun barrel is arranged as a sealing system a piston seal in the region of the solid head part of the exercise projectile, wherein a radially displaceable sealing ring engages in an annular groove in the rear region of the head portion or in a region of the head part cross-tail fin body , In this case, the groove bottom of the annular groove is connected via a plurality of substantially radial bores with at least one axially extending recess of the head part, which opens at the front end of the head part, which defines the interior of the tail body geschoßkopfseitig.

Preferably, the sealing ring has a T-shaped cross-section and is secured by two Umgriffsleisten the annular groove, so that the sealing ring after firing of the practice bullet remains at this.

In this case, a Umgriffsleiste the annular groove can be formed by the outer wall portion of the head part and the second Umgriffsleiste by the outer wall portion of the tail body.

However, it can also be provided that the sealing ring has a rectangular cross section, provided that it is reproducibly destroyed during the launch of the training projectile by the pressure of the outlet gas and thrown off the training projectile in front of the weapon barrel. In this case, the Umgriffsleisten the annular groove can be omitted. In order to reliably prevent the sealing ring from shearing off between the gaps between the head part and the tail body, it is preferable to provide a band made of a metal (eg steel).

In a preferred embodiment of the invention, the axial recess running in the head part is a turning gap.

Instead of a rotary gap, however, the axial recess extending in the head part may also be a bore.

To ensure that the firing 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, 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 is preferably made of plastic.

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

1 the longitudinal section through an inventive, consisting of a head part and a tubular Leitwerkskörper full-caliber training projectile, wherein on the outside of the head part, a sealing system is arranged, which comprises an annular groove and a sealing ring;

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

3 an enlarged view of the head part of in 1 illustrated training projectile, wherein the head part is shown rotated about its longitudinal axis, that two opposite radial bores are visible, which connect the annular groove of the sealing system with a rotary gap.

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

The practice floor 1 includes a solid headboard 3 with a rear-side arranged tracer body 4 and a back to the headboard 3 subsequent tubular tail body 5 ,

The tubular tail body 5 is designed so that when launching the practice bullet 1 resulting propellant gases on the outside 6 the side wall 7 of the tubular tail body 5 Act.

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

To avoid the propellant gases inside the gun barrel on the outside of the entire practice floor 1 can flow past is a sealing system 10 in the area of the massive headboard 3 of the practice floor 1 arranged.

It engages a plastic existing sealing ring 11 with T-shaped cross-section in a circumferential groove-shaped recess (annular groove) 12 in the rear area of the headboard 3 a, wherein for ease of assembly, the annular groove 12 the rear side through the front end face of the tail body 5 is limited. To secure the T-shaped sealing ring 11 are second Umgriffsleisten 13 . 14 provided, the one Umgriffsleiste 13 the ring groove 12 through the outer wall region of the head part 3 and the second Umgriffsleiste 14 through the outer end wall region of the tail body 5 is formed.

In the sealing system 10 it is a piston ring seal. Here is the groove bottom 15 the ring groove 12 of the head part 3 (see also 3 ) over several (eg eight) radial bores 16 with an axially extending recess 17 of the head part 3 connected, extending from the radial holes 16 to the front end 18 of the head part 3 which extends the interior 19 of the tail body 5 limited ( 1 ).

In the illustrated embodiment, the radial recess 17 around a turning gap. This is obtained by the head part 3 from an outdoor part 30 and one in the outer part 30 screw-in inner part 31 composed. In this case, the inner part 31 into the area of the radial bores 16 a smaller outer diameter than the inner diameter of the outer part 30 , so that between inner and outer part 30 . 31 the recess 17 results.

The at launch of the practice projectile 1 in the interior 19 of the tail body 5 passing propellant gases then pass partially over the rotary gap 17 in the radial holes 16 and act on a plastic film 20 for sealing moisture and an elastic band 21 on the sealing ring 11 , so that this relatively large area is pressed to the outside against the inner wall of the gun barrel, not shown, and on the tail body 5 withholds propellant gases flowing past on the outside. The plastic film 20 can be omitted if sealing ring 11 without / with underlay 21 directly on the headboard 3 is pressed or shrunk.

The sealing ring 11 For example, before mounting the headboard and tail body either on the headboard 3 pressed or sprayed on and then turned off to measure and / or without twisting directly on the headboard 3 be raised.

Of course, the invention is not limited to the embodiment described above. For example, the Unterlegband can be omitted.

Furthermore, it can also be provided that the sealing ring has only a rectangular cross-section, provided that it is reproducibly destroyed during the firing of the training projectile by the Mündungsgasdruck and is dropped in front of the gun barrel of the training projectile.

In addition, the rotary gap provided in the head part can be replaced by one or more axial bores, so that the two-part design of the head part is eliminated.

LIST OF REFERENCE NUMBERS

1

Full-caliber practice floor, training floor

2

casing cover

3

headboard

30

outer part

31

inner part

4

Tracer element

5

tail body

6

outside

7

Side wall

8th

guide element

9

guide ring

10

Sealing system, piston ring seal

11

sealing ring

12

groove-shaped recess, annular groove

13, 14

surrounding rails

15

groove base

16

radial bore

17

Recess, rotary gap

18

End (headboard)

19

inner space

20

Plastic film

21

Unterlegband

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

• DE 10201003433 A1 [0002, 0003]

Claims (9)

Can be fired from a gun barrel stabilized full-caliber training projectile ( 1 ) with a solid headboard ( 3 ) and one at the rear of the headboard ( 3 ) subsequent tubular tail body ( 5 ), whereby the practice floor ( 1 ) peripherally with a sealing system ( 10 ), having the features: a) the tubular tail body ( 5 ) is designed so that the at the launch of the practice projectile ( 1 ) formed propellant gases on the outside ( 6 ) of the side wall ( 7 ) of the tubular tail body ( 5 ) Act; b) the sealing system ( 10 ) is in the area of the head part ( 3 ) of the training projectile ( 1 ), wherein a sealing ring ( 11 ) in an annular groove ( 12 ) in the rear region of the head part ( 3 ) or in an area of the headboard ( 3 ) overlaying tail body ( 5 ) and c) in the sealing system ( 10 ) is a piston ring seal, wherein the groove bottom ( 15 ) of the annular groove ( 12 ) over a plurality of substantially radial bores ( 16 ) with at least one axially extending recess ( 17 ) of the head part ( 3 ), and wherein the axially extending recess ( 17 ) at the front end ( 18 ) of the head part ( 3 ), which opens the interior ( 19 ) of the tail body ( 5 ) on the bullet side. Exercise projectile according to claim 1 or 2, characterized in that the sealing ring ( 11 ) has a T-shaped cross section and two Umgriffsleisten ( 13 . 14 ) in the annular groove ( 12 ) is secured. Exercise projectile according to claim 2, characterized in that the one Umgriffsleiste ( 13 ) of the annular groove ( 12 ) through the outer wall portion of the head part ( 3 ) and the second handle strip ( 14 ) through the outer wall region of the tail body ( 5 ) is formed. Exercise projectile according to claim 1, characterized in that the sealing ring ( 11 ) has a rectangular cross-section. Exercise projectile according to one of claims 1 to 4, characterized in that between the groove bottom ( 15 ) of the annular groove ( 12 ) and the sealing ring ( 11 ) a band ( 21 ) is arranged. Exercise projectile according to one of claims 1 to 5, characterized in that it in which in the head part ( 3 ) extending axial recess ( 17 ) is a turning gap which is formed by the head part ( 3 ) an annular groove ( 12 ) receiving outer part ( 30 ) and a rear side into the outer part ( 30 ) screw-in inner part ( 31 ), wherein up to the area of the radial bores ( 16 ) the outer diameter of the inner part ( 31 ) is smaller than the inner diameter of the outer part ( 30 ). Exercise projectile according to one of claims 1 to 5, characterized in that it in which in the head part ( 3 ) extending axial recess around a bore. Exercise projectile according to one of claims 1 to 7, characterized in that the tubular tail body ( 5 ) spaced apart, knob-shaped guide elements ( 8th ), one around the tail body ( 5 ) arranged around guide ring ( 9 ) form. Exercise projectile according to one of claims 1 to 8, characterized in that the sealing ring ( 11 ) consists of plastic.

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