RU192404U1 - Artillery shell - Google Patents

Abstract

The utility model relates to ammunition. The artillery shell contains a body with a septum belt installed in the annular groove of the rear centering bulge with a radial clearance relative to the channel of the gun barrel. The obturating belt is made of two flat rings of movable metal, facing the head of the projectile and polymer elastically deformable in the radial direction, facing the bottom of the projectile. EFFECT: compensation of wear and temperature expansion of the barrel bore, reduction of dispersion of shells during firing, reduction of wear rate of the inner surface of the barrel. 3 ill.

Description

The utility model relates to defense technology, and more specifically to artillery shells.

In currently used artillery shells intended for loading from the muzzle of the gun’s barrel, this is especially true for smooth-bore mortars to provide an obturation of propellant gases of a propellant charge when fired, annular grooves are formed on the shell of the shell, forming a labyrinth seal.

To ensure free loading, to avoid compression when loading from the muzzle of the gun’s barrel, the outer surface of the shell of the projectile is performed with a guaranteed gap around the entire contour of the inner surface of the channel of the gun’s barrel. The presence of the specified gap does not allow for reliable obturation of the powder gases of the propellant charge.

The noted drawbacks are eliminated in artillery shots according to the patent of the Russian Federation No. 2224212 [1], where the task of obturation of propellant propellant gases is solved by making a lead belt in the form of a ring mounted in a recess on the shell of the projectile with a gap in the radial and axial directions. The pressure of the propellant gas propellant charge acts on the inner surface of the leading belt, made in the form of a ring elastically deformable in the radial direction, and mounted in the recess on the shell of the projectile due to the presence of radial and axial clearance, which provides free flow of the powder gas from the projectile space, as a result of which the belt is unclenched.

This technical solution allows to reduce the gaps between the belt and the channel of the gun barrel and the flow of powder gases through the belt. However, this performance of the leading belt does not solve the problem of increasing the reliability of the obturation when firing a projectile from the gun barrels in full, especially for implementation in artillery shells fired from smoothbore guns.

In the well-known artillery shell according to the patent of the Russian Federation No. 2357198 [2], selected for the prototype, in the artillery shell containing a housing, a leading belt installed in a recess on the body, the belt is made of two rings located in the recess one after the other, with one ring it is rigidly connected with the front wall of the recess, an annular cavity is made in it, open towards the rear wall of the recess, the second ring is made stepped in cross section with a protrusion at the front end from the side of its internal surface , cut along the cross section and placed with a gap from the back wall of the recess, the protrusion of the second ring is introduced into the annular cavity, a radial clearance is arranged between the outer surface of the protrusion and the inner surface of the annular cavity, radial grooves and an annular ledge are made on the rear end of the second ring from the inner side surfaces that form a cavity open from the aft side of the projectile, while the diameters of the outer surface of the rings are less than the diameter of the outer surface of the projectile.

This technical solution does not take into account the wear of the gun’s bore and its temperature expansion during firing.

The problem solved by the proposed technical solution is the insufficient reliability of the obturation of artillery shells intended for firing from guns charged from the muzzle of its barrel.

This problem is solved by using an obturation device in the design of the artillery shell to compensate for uneven wear and thermal expansion of the gun barrel, made in the form of two flat polymer and movable metal rings installed in the annular recess of the rear centering thickening.

In FIG. 1 shows a general view of a projectile (1) with an obturation device for compensating for wear and thermal expansion of the barrel bore (4), consisting of two flat polymer rings (2) and a movable metal (3). In FIG. 2 illustrates the operation of the compensation device.

The proposed structural element works as follows. In the initial position (Fig. 2, a) the outer diameter of the polymer ring (d _p ) is less than the diameter of the bore, which facilitates the loading of the projectile into the gun. When fired after under the influence of pressure forces of the powder gases, the projectile performs accelerated translational motion (V) along the bore

(four). Under the action of inertia forces (P), the metal ring (3) translates in the direction opposite to the direction of the projectile movement, acting on the polymer ring (2) and leads to elastic deformations of the latter, which increases its diameter and eliminates the gap (A) between the inner surface of the bore and the shell of the projectile. In this case, the elastic deformation of the polymer ring allows you to eliminate the gap (A), the value of which changes during the operation of the gun due to wear and thermal expansion of the barrel, resulting in reduced dispersion of shells during firing.

The claimed design of an artillery shell with a device for wear and compensation of thermal expansion of the gun barrel differs from the prototype in that it uses a combination of two flat rings of movable metal and polymer, which acts as a seal to prevent breakthrough of powder gases from the projectile space.

The use of an elastically deformable element will allow: to compensate for the wear of the inner surface of the barrel, to compensate for the increase in temperature expansion of the inner diameter of the barrel during firing, to reduce the dispersion of shells during firing and, as a result, to increase the accuracy of shooting, to reduce the wear rate of the inner surface of the barrel.

Artillery shell

Literature

1. RF patent No. 2224212, class. F42B 14/02 of 02.20.2004.

2. RF patent No. 2357198, cl. F42B 14/02 of 11/19/2007.

Claims (1)

An artillery shell comprising a body with an obturating belt installed in an annular groove of the rear centering bulge with a radial clearance relative to the gun barrel, characterized in that the obturating belt is made of two flat metal movable rings facing the head of the projectile and a polymer elastically deformable in the radial direction facing the bottom of the projectile.

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