DE202014005442U1 - Artillery shell with a sealing ring - Google Patents

Abstract

Artillery projectile (1) having the following features: a) the artillery projectile (1) is spin-stabilized and has a projectile casing (10), which is surrounded by a guide band (20) for swirl transmission, b) the projectile casing (10) is also of a sealing ring (30) encompassed, c) the sealing ring (30) is arranged at the rear side of the guide strip (20), d) the sealing ring (30), which has a peripheral sealing profile, is held in an outer groove (40) of the projectile casing (10), e) the outer groove (40) comprises a groove base (41), which is followed by a rear groove flank (42) and a bow-side groove flank (43), characterized by the following features: f) the circumferential sealing profile of the sealing ring (30) has a rear side open V-shape with a first leg and a second leg connected thereto, g) the first leg is a Nutgrundschenkel (31) which surrounds the groove base (41), h) the second leg is a resilient sealing leg (32), de ss free end radially outwardly springs, but as far as can be pressed together that it is completely absorbed by the outer groove (40) and does not protrude.

Description

The invention relates to an artillery projectile with a newly designed sealing ring.

From the DE 10 2010 006 221 A1 a generic artillery projectile is known, which is described below with reference to the 1 will be described in more detail. The artillery projectile shown 1 is spin stabilized and has a projectile shell 10 on, by a leader 20 for swirl transmission is included. The projectile shell 10 is also of a sealing ring 30 encompassed. The sealing ring 30 is the back of the leader tape 20 arranged. The sealing ring 30 , which has a circumferential sealing profile, is in an outer groove 40 the projectile shell 10 supported. The outer groove 40 includes a groove bottom, which is followed by a rear-side groove flank and a bow-side groove flank.

• – Beim Zuführen der Munition in das Waffenrohr liegt das Geschoss 1 mit dem hervorstehenden Führungsband 20 bzw. mit dem hervorstehenden Dichtring 30 auf der Ladeschale auf, so dass das Geschoss 1 nicht exakt parallel zur Ladeschale zum Liegen kommt. In Verbindung mit einer nicht optimal justierten Ladeschale kann dies dazu führen, dass das Geschoss 1 nicht sauber, d. h. nicht mittig angesetzt wird. Als Folge kann es zu einem verstärkten Anstoßen des Dichtrings 30 im Übergangsbereich vom Ladungsraum in das Waffenrohr 2 kommen. Im ungünstigen Fall kann der Dichtring 30 dann vom Geschoss 1 abgesteift werden oder im Extremfall auch zerbrechen. Letzteres stellt eine erhebliche Gefährdung der Bedienmannschaft im Ladungsraum dar.
• – Eine Zerstörung des Dichtrings 30 kann durch eine alterungsbedingte Versprödung des Kunststoffdichtrings, aber auch durch tiefe Temperaturen begünstigt sein.
• – Ebenfalls ist nicht auszuschließen, dass bereits der Montageprozess zu einer Versprödung des Dichtrings 30 beiträgt, da die Dichtringe 30 zu ihrer Aufweitung gewässert werden.

This in 1 illustrated artillery shell 1 is used in the Panzerhaubitze 2000 via a semi-automatic loader. When applying the guide tape 20 into the features of the barrel 2 pressed. The sealing ring 30 is designed to seal überkalibrig and has the function of preventing a flow past the propellant gases during firing. This sealing ring 30 must be cut when preparing the projectile in the draws of the gun barrel to ensure a seal. This can lead to stripping or destruction of the sealing ring 30 come. The reason for this are several individual faults, which, when combined in combination, favor the occurrence of a damage pattern:

• - When feeding the ammunition in the gun barrel is the bullet 1 with the protruding guide band 20 or with the protruding sealing ring 30 on the charging cradle, leaving the bullet 1 not exactly parallel to the charging tray comes to rest. In conjunction with a not optimally adjusted charging cradle this can cause the bullet 1 not clean, ie not centered. As a result, there may be an increased impact of the sealing ring 30 in the transition area from the cargo space into the weapon barrel 2 come. In the worst case, the sealing ring 30 then from the floor 1 be stung or even break in extreme cases. The latter represents a significant threat to the operating crew in the cargo area.
• - Destruction of the sealing ring 30 may be favored by an aging-related embrittlement of the plastic sealing ring, but also by low temperatures.
• - It can not be ruled out that the assembly process already leads to embrittlement of the sealing ring 30 contributes, since the sealing rings 30 be watered to its expansion.

The invention is based on the object to form a sealing ring for a generic artillery projectile in such a way that it is functionally reliable with good sealing function even under extreme conditions.

This object is achieved by the features of claim 1.

The advantages of the invention are based on a new design of the circumferential sealing profile of the sealing ring. The circumferential sealing profile of the sealing ring has a rear side open V-shape with a first leg and a second leg connected thereto. The V-shape opened at the rear causes the sealing effect to increase as the pressure of the rear propellant gases increases. The first leg is a Nutgrundschenkel, which encloses the groove bottom. The second leg is a resilient sealing leg, whose free end springs radially outward, but as far as can be pressed together that it is completely absorbed by the outer groove and does not protrude. As a result, destruction, stripping of the projectile or other damage is avoided.

According to one embodiment of the invention, in a loading position, when the artillery projectile is received from a weapon barrel before firing, a circumferential annular gap is formed between the groove base leg and the resilient sealing leg, which allows an inflow of propellant gases. The inflow of the propellant gases causes the pressure of the propellant gases further spreads the resilient sealing leg, whereby the sealing effect is amplified by the pressure of the propellant gases.

According to a further embodiment of the invention, the resilient sealing leg is chamfered at its free end under a widening of the annular gap. The broadening of the annular gap facilitates inflow of the propellant gases into the annular gap.

According to a further embodiment of the invention, the resilient sealing leg is formed to form a circumferential inlet opening for inflowing into the annular gap propellant gases shorter than the Nutgrundschenkel. This represents a simple design possibility to form an inlet opening for the annular gap.

The drawings are briefly described below. Show it:

1 an artillery shell according to the prior art, shown in longitudinal section,

2 an inventive artillery projectile with a newly designed sealing ring, also shown in longitudinal section,

3 the in 2 illustrated sealing ring and its surrounding area, shown as an enlarged detail.

An embodiment of the invention will be described below with reference to the 2 and 3 explained. A spin stabilized artillery round 1 has a projectile shell 10 on, by a leader 20 for swirl transmission is included. The projectile shell 10 is also of a sealing ring 30 encompassed. The sealing ring 30 is the back of the leader tape 20 arranged. The sealing ring 30 , which has a circumferential sealing profile, is in an outer groove 40 the projectile shell 10 supported.

Details of the Artillergeschosses invention are based on the enlarged detail in 3 described. As 3 first illustrated, includes the outer groove 40 a groove bottom 41 , whereupon a rear groove flank 42 and a bow-side groove flank 43 followed. The circumferential sealing profile of the sealing ring has a rear side open V-shape with a first leg and a second leg connected thereto. The first leg is a groove bottom leg 31 who has the groove bottom 41 encloses. The second leg is a resilient sealing leg 32 whose free end springs radially outward. The V-shape has a sealing assisting effect which increases with higher pressure of propellant gases. The resilient sealing leg 32 so far pressed together that he is completely out of the outer groove 40 is receivable and does not stick This will damage the sealing ring 30 avoided.

In the in 3 loading position shown when the artillery shell 1 before firing from the gun barrel 2 is absorbed, is between groove base legs 31 and resilient sealing leg 32 a circumferential annular gap 33 designed, which allows an influx of propellant gases.

The resilient sealing leg 32 is at its free end under a broadening of the annular gap 33 bevelled, making the propellant gases easier in the annular gap 33 can penetrate.

The resilient sealing leg 32 is to form a circumferential inlet opening 34 for in the annular gap 33 inflowing propellant gases formed shorter than the Nutgrundschenkel 31 ,

Functionality:

Before attaching the artillery projectile 1 is the resilient sealing leg 32 farther outward than in the 3 illustrated loading position. During charging, the resilient sealing leg 32 against its spring effect in the direction of Nutgrundschenkels 31 pressed and supported by this. In this position lies between resilient sealing leg 32 and the groove bottom leg 31 an annular gap 33 in front. During the firing process, the propellant charge gases flow into the annular gap 33 , Due to the buildup of gas pressure in the annular gap 33 becomes the resilient sealing leg 32 outward into the features of the barrel 2 pressed. An occurring at the beginning of the rear flow of the resilient sealing leg 32 supports due to the Bernoulli effect, the sealing effect, since according to Bernoulli, the back flow a contact pressure of the resilient sealing leg 32 on the inside of the barrel.

LIST OF REFERENCE NUMBERS

1

artillery shell

2

barrel

10

projectile casing

20

guide band

30

seal

31

Nutgrundschenkel

32

resilient sealing leg

33

annular gap

34

circumferential inlet opening

40

outer groove

41

groove base

42

rear groove flank

43

bow-side groove flank

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 102010006221 A1 [0002]

Claims (4)

Artillery shell ( 1 ) having the following characteristics: (a) the artillery shell ( 1 ) is spin-stabilized and has a projectile casing ( 10 ), by a leader ( 20 ) is included for swirl transmission, b) the projectile casing ( 10 ) is further characterized by a sealing ring ( 30 ), c) the sealing ring ( 30 ) is on the rear side of the guide band ( 20 ), d) the sealing ring ( 30 ), which has a circumferential sealing profile, is in an outer groove ( 40 ) of the projectile casing ( 10 ), e) the outer groove ( 40 ) comprises a groove bottom ( 41 ), whereupon a rear groove flank ( 42 ) and a bow-side groove flank ( 43 ), characterized by the following features: f) the circumferential sealing profile of the sealing ring ( 30 ) has a rear-side open V-shape with a first leg and a second leg connected thereto, g) the first leg is a Nutgrundschenkel ( 31 ), which the groove bottom ( 41 ), h) the second leg is a resilient sealing leg ( 32 ), the free end of which springs radially outward, but can be pushed together so far that it is completely separated from the outer groove (FIG. 40 ) is receivable and does not protrude. Artillery shell ( 1 ) according to claim 1, characterized in that in a loading position, when the artillery ( 1 ) before firing from a gun barrel ( 2 ), between groove base legs ( 31 ) and resilient sealing leg ( 32 ) a circumferential annular gap ( 33 ) is formed, which allows an influx of propellant gases. Artillery projectile according to claim 2, characterized in that the resilient sealing leg ( 32 ) at its free end with a broadening of the annular gap ( 33 ) is bevelled. Artillery projectile according to one of claims 1 to 3, characterized in that the resilient sealing leg ( 32 ) with the formation of a circumferential inlet opening ( 34 ) for in the annular gap ( 33 ) flowing propellant gases is shorter than the Nutgrundschenkel ( 31 ).

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