DE10041115A1 - Method for reducing the sag of a weapon barrel and device for carrying out the method - Google Patents

Abstract

The invention relates to a method for reducing the sag of a weapon barrel (1; 11) which occurs after different conclusions due to different temperatures between the tube underside (9) and the tube top (10), and to a device for carrying out the method. DOLLAR A In order to achieve that the sag of a gun barrel (1; 11) can be reduced in a simple manner compared to comparable known gun barrels, the invention proposes that a gaseous medium of a predetermined temperature and a predetermined pressure into the gun barrel (1 ; 11) is initiated such that a convection flow is prevented by the defined flow through the tube bore (7 ') over a predetermined period of time and the temperature differences occurring between the tube underside (9) and the tube top (10) in the case of a particular firing sequence are largely prevented.

Description

The invention relates to a method for reducing after certain firing sequences due to different temperatures between the tube bottom and tube top kicking sag of a gun barrel. The invention further relates to a Device for performing the method.

In the case of large-caliber weapons in particular, there is a relative after certain firing sequences Great warming of the inner tube wall, often causing a temperature difference between the tube underside and the tube top of the corresponding weapon barrel comes. This temperature difference, which can persist for several hours, leads to egg a slight deflection of the gun barrel. This leads to a reduction the accuracy of the weapon and it is an increased readjustment of the weapon by means of the Alignment system required, which in turn places an additional burden on the gunner leads.

It has already been proposed to have protective elements on the outside of the barrel (e.g. a bandage with heat-insulating material or a protective tube made of aluminum nium or glass fiber reinforced plastic) to be attached to external thermal influences to reduce to the gun barrel. However, such measures lead to none  Significant reduction in the internal thermi influences on the gun barrel, so that even with such gun barrels a certain shot sequence results in a sag of the tube.

The invention has for its object a method of the type mentioned admit, with which the sag of a gun barrel compared to ver comparable known gun pipes can be reduced. The invention relates also on a device for carrying out the method with a weapon barrel Smoke Evacuator.

This object is achieved according to the method by the features of Claim 1 and in terms of the device solved by the features of claim 5. Further, particularly advantageous embodiments of the invention are disclosed in the Unteran claims.

The invention is essentially based on the idea of firing a shot gaseous medium continuously with a predetermined temperature in the gun barrel initiate such that convection currents are prevented and thereby the certain shot sequences resulting temperature difference between the bottom of the tube and pipe top is also largely prevented.

The gaseous medium can be introduced into the barrel of the weapon or if the weapon barrel is equipped with a smoke evacuator, it can be gaseous Medium can also be introduced into the gun barrel via this. For this purpose, in the Au Outer wall of the smoke evacuator introduced at least one opening through which the gaseous medium is introduced into the pressure chamber of the smoke evacuator. From the sem it then passes through the located between the gun barrel and the pressure chamber Smoke vents in the inside of the gun barrel.

Compressed air or nitrogen have proven to be suitable as a gaseous medium sen.

Further details and advantages of the invention will become apparent from the following exemplary embodiments explained by figures. Show it:

Figure 1 shows the gun barrel of a tank cannon, in which the gaseous medium is introduced via the breech.

Fig. 2 shows the weapon barrel of a tank cannon with smoke extractor, in which the gaseous medium is introduced via the smoke extractor and

Fig. 3 is an enlarged view of the area designated III in Fig. 2, in which the smoke evacuator is arranged.

In Fig. 1, 1 designates the weapon barrel of a tank gun, which has a Bo denstück 2 with a wedge 3 .

After the shot has been fired and the pipe return and pipe flow have been completed, a gaseous medium (preferably compressed air or nitrogen) is introduced from the breech 3 into the weapon barrel 1 from a container 4 via an open valve 5 and via a pipe or hose line 6 with a predetermined pressure. The gaseous medium flows through the tube bore 7 ′ for a predetermined period of time and emerges from the mouth 8 of the weapon barrel 1 at the front.

The gaseous medium and the pressure are selected such that the bore 7 'of the weapon barrel 1 is flowed through uniformly with a quantity of the gaseous medium which is matched to the caliber at a constant flow rate. This prevents a convection flow, uniform heating of the tube inner wall 7 is achieved and the formation of a temperature difference between the tube bottom 9 and tube top 10 is largely prevented.

In Fig. 2, a gun barrel 11 is shown with a smoke evacuator 12 , in which the gaseous medium with a given pressure after firing the shot and finished pipe return and pipe flow through a pipe or hose 13 through an opening 14 of the outer wall 15 of the smoke evacuator 12 ( Fig. 3) in its pressure chamber 16 is tet. From the pressure chamber 16 , the gaseous medium then flows through smoke exhaust openings 17 arranged radially on the weapon barrel 11 into the front caliber part 18 of the weapon barrel 11 .

The invention is of course not based on the two embodiments described games limited. So the method according to the invention, except for tank cannons z. B. can also be used on machine guns and artillery weapons.  

LIST OF REFERENCE NUMBERS

1

barrel

2

breech

3

Closure, wedge closure

4

container

5

Valve

6

Pipeline, hose line

7

Inner tube wall

7

'' Pipe drilling

8th

muzzle

9

Pipe bottom

10

Tube top

11

barrel

12

Smoke Evacuator

13

Pipeline, hose line

14

opening

15

outer wall

16

pressure chamber

17

Smoke outlet

18

front caliber part

Claims (5)

1. A method for reducing after certain firing sequences due to differing temperatures between the tube underside ( 9 ) and tube top ( 10 ) tending sag of a weapon barrel ( 1 ; 11 ), characterized in that a gaseous medium predetermined tempe after firing a shot is introduced into the weapon barrel ( 1 ; 11 ) in such a way that by flowing through the barrel bore ( 7 ') over a predetermined period of time convection currents and thus the temperature differences occurring in certain firing sequences between the barrel bottom ( 9 ) and the barrel top ( 10 ) as far as possible be prevented. 2. The method according to claim 1, characterized in that the gaseous medium is introduced on the closure side into the gun barrel ( 1 ). 3. The method according to claim 1, characterized in that in a gun barrel ( 11 ) with smoke evacuator ( 12 ) the gaseous medium via the between the gun barrel ( 11 ) and the pressure chamber ( 16 ) of the smoke evacuator ( 12 ) located smoke extraction openings ( 17 ) in the weapon barrel ( 11 ) is introduced. 4. The method according to any one of claims 1 to 3, characterized in that as a gas shaped medium compressed air or nitrogen is used. 5. Apparatus for performing the method according to claim 3, characterized in that in the outer wall ( 15 ) of the smoke evacuation device ( 12 ) at least one opening ( 14 ) is provided through which the gaseous medium in the pressure chamber ( 16 ) of the smoke evacuation device ( 12 ) is initiated.