RU192402U1 - ARTILLERY PROBLEM WITH STABILIZATION DEVICE FOR SMOOTH GUN - Google Patents

Abstract

The utility model relates to ammunition. The projectile contains a housing with an annular groove, centering the thickening. The projectile is equipped with a stabilization device when moving in the bore, compensating for uneven wear and thermal expansion of the gun barrel, made in the form of front and rear obturating belts, each of which consists of two flat rings of movable metal and polymer elastically deformable in the radial direction, while the outer diameter is elastically deformable rings more than the caliber of the projectile. The pressure of the metal rings on the polymer when the projectile moves along the bore leads to an increase in the diameter of the latter, which makes it possible to compensate for uneven wear and thermal expansion of the bore, to reduce the wear rate on the inner surface of the barrel. 3 ill.

Description

The utility model relates to the technique of ammunition, namely to special mechanical engineering, and can be used to modernize the design of existing artillery shells used in firing from smooth-bore artillery weapons (GAO).

Currently designed and used shells designed for firing from the GAO, with a sealed device in the form of a copper belt (MOS), located near the bottom of the shell. When the projectile moves along the bore, the MOS interacts with the surface of the bore

The caliber of smooth-bore artillery weapons is determined by the diameter of the inside of the barrel. The caliber of the shells used in firing corresponds to the diameter of their centering thickening (TsU - Fig. 1). When fired, the effect of the high-temperature combustion products of the powder charge on the inner part of the bore leads to thermoplastic wear and thermal expansion of the bore of the guns. Thermal expansion of the barrel and wear increases with each subsequent shot (see Fig. 1). Moreover, the wear of the barrel is not uniform along the length of the barrel.

As a result, the diameter of the inner surface of the barrel bore, which determines the caliber of the weapon, becomes larger than the diameter of the centering bulge of the projectile, which leads to an increase in the gap Δ between the control center and the barrel bore surface. As a result, the transverse vibrations of the projectile (α) increase and the projectile is destabilized when moving in the bore. The impact of the shell of the shell on the barrel increases its wear, reduces the survivability of the weapon and can lead to abnormal operation of the fuse. In addition, when shells exit the barrel, they acquire large nutation angles, the movement of the shells on the trajectory becomes less stable, and, as a result, the external ballistic characteristics of the weapon (initial projectile speed, firing range) deteriorate.

Leading devices (WUs) are widely used in the construction of artillery shells (for example [1]), however, additional elements stabilizing the shell during movement in the barrel channel by compensating for thermal expansion and uneven wear of the barrel of the guns and located in the region of the centering thickening of the artillery shells and, up to no time has been used.

The closest in technical essence is an aircraft artillery shell with a device for compensating the thermal expansion of the gun barrel [2], comprising a body with annular grooves, a ballistic tip, a piece, a centering bulge, a copper lead belt, a lead sealing ring and a bottom fuse, and equipped with a temperature compensation device expanding the barrel of the gun, made in the form of a ring of copper or polymer, installed by pressing in a ring undercut of a centering thickening.

The disadvantage of the described ammunition is that the outer diameter of the device for compensating for the thermal expansion of the bore (front obturating belt) is formed by cutting into the bore and then remains constant during movement. The diameter of the barrel channel due to uneven wear is varied along the length of the barrel, which leads to the appearance of a gap between the obturating belt and the barrel channel and disruption of the compensation device.

The problem solved by this invention is the insufficient stability of the projectile in the bore due to thermal expansion and uneven wear of the bore of the gun.

This problem is solved by using stabilization device in the design of the projectile when moving in the barrel channel by compensating for thermal expansion and uneven wear of the barrel of the gun, made in the form of front and rear obturating belts, each of which consists of two flat rings of movable metal facing the head the projectile, and the polymer elastically deformable in the radial direction, facing the bottom of the projectile, while the outer diameter of the elastically deformable rings larger caliber projectile.

In FIG. 2 shows a projectile (1) with a stabilization device when moving in the bore (4). The stabilization device consists of a front (5, 6) and rear (2, 3) obturating belts, each of which consists of two flat rings of a movable metal (3, 6) and a polymer elastically deformable in the radial direction (2, 5). In FIG. 3 illustrates the operation of the stabilization device (front obturating belt).

In the initial position (Fig. 3, a) the outer diameter of the polymer ring d _{p is} larger than the diameter of the barrel bore d _to , which provides the initial obturation in the process of loading the projectile into the gun. When fired after under the influence of pressure forces of the powder gases, the projectile performs an accelerated translational motion (V) along the bore (4). Under the action of inertia forces (P), the metal ring (6) translates in the direction opposite to the direction of the projectile movement, acting on the polymer ring (5) and leads to elastic compression of the latter in the axial direction (Fig. 3.b). In this case, the polymer ring (5) tends to expand in the radial direction, as a result of which the pressure on the bore from the ring side (S) increases and the obturation increases. In this case, due to elastic deformation, the polymer ring is constantly pressed against the surface of the barrel channel, which makes it possible to compensate for the uneven wear of the barrel (7) (Fig. 3.c), as a result of which the projectile motion stability in the barrel channel increases when firing.

The projectile stabilization device while moving in the barrel channel evenly fills the space between the centering bulge and the surface of the barrel channel, centers the projectile as it moves along the barrel channel (Fig. 2) and eliminates the transverse shock loads arising from the action of its centering bulge on the inner surface of the barrel channel. The projectile stabilization device also acts as a shutter and additionally eliminates the breakthrough of powder gases due to the projectile space, increasing their efficiency.

The use of two elastically deformable elements will compensate for uneven wear on the inner surface of the barrel and thermal expansion, resulting in increased stability of the projectile in the barrel during firing.

Literature

1. Ammunition for aircraft guns and machine guns. / Reference manual for specialists of military units M .: Military publishing house of the USSR Ministry of Defense 1997

2 .. RF patent No. 2357199, cl. F42B 14/02 from 27.025.2009.

Claims (1)

An artillery shell containing a housing with annular grooves, a stabilization device when moving in the bore, characterized in that the stabilization device is made in the form of front and rear obturating belts, each of which consists of two flat rings of movable metal facing the head of the shell, and polymer elastically deformable in the radial direction, facing the bottom of the projectile, while the outer diameter of the elastically deformable rings is larger than the caliber of the projectile.

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