CZ283293B6 - Apparatus for sealing a gap between a main and a cartridge chamber of a revolver system cylinder - Google Patents

Abstract

This equipment for sealing the gap between the head (10) and hub chamber (5) of the cylinder of the turret systems is designed so that in the working cylinder (11) of the high-pressure part there is a movable valve (1) which ensures fixing using a fixing ring (2).<IMAGE>

Description

In the prior art turret guns, there is a main gap between the cylinder and the barrel, varying from 0.05 to 0.25 mm in various designs, with the gap increasing steadily with use. This results in a reduction in the muzzle energy of the missile, as a result of the dust gas leakage and thus a reduction in the pressure behind the missile. As a result, the weapon continues to depreciate until completely useless. Another system achieves a reduction in the gap by mechanically punching the cylinder against the barrel, often together with a partially covered mouth or cartridge hub. For example, the system used in NAGANT revolvers. Rolling the cylinder in and out of the cylinder of this system is demanding on the design of the weapon and the cartridge, which must be appropriately choked.

SUMMARY OF THE INVENTION

The above-mentioned drawbacks are eliminated by a device for sealing the gap between the main and hub chamber of a turret cylinder according to the present invention, which is characterized in that a slide valve which secures the fixing ring is movably mounted in the working cylinder of the high-pressure part.

The device according to the invention allows a perfect sealing of the gap between the rollers and the barrel, thereby maintaining the muzzle energy of the projectile throughout the life of the turret.

Overview of the drawings

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be explained in more detail with reference to the drawing, in which FIG. 1 shows a device in section and FIG. 2 shows a fixing ring with a separation gap.

DETAILED DESCRIPTION OF THE INVENTION

The device according to FIG. 1 consists of a working cylinder 11 of the high-pressure part in which the slide 1 secured against falling out by the fixing ring 2 is movably mounted.

The device according to FIG. 1 operates in such a way that the same time-varying chamber pressure is generated in the space of the cartridge chamber 5 and in the working cylinder 11 of the high-pressure part when the dust filling 4 is initiated and burned. The gap 6 creates a critical cross section in the first phase of the shot. Its input is given by the diameter of the cartridge chamber 5 and the output by the outer diameter of the slide L This cross-section produces a critical and slightly supersonic current in which there is a critical and lower than a critical static pressure which represents maximum 0.6 of variable chamber pressure. This creates a force which strikes the slide 1 against the area around the chamber 5, thereby sealing it completely. This force is determined by the cross-section of the slide 1 and the difference between the chamber pressure and the critical pressure. As soon as the ventricular pressure has passed, the pressing force has passed and the cylinder can be rotated to prepare the next shot. This procedure is repeated automatically after emptying the cartridge 3 and leaving the missile 9

The pressure is passed through the transfer nozzles 7 and the grate 8, where it further acts on the bullet 9 in the barrel 10.

The device according to the invention can be used in all turret guns with a gap between the cylinder and the barrel.

Claims (1)

PATENT CLAIMS Apparatus for sealing the gap between the main and hub chamber of a turret cylinder, characterized in that a slide (1) secured by a fixing ring (2) is movably mounted in the working cylinder (11) of the high-pressure part.