RU2613639C1 - Throwing method from barreled powder ballistic facility - Google Patents

Abstract

FIELD: weapons and ammunition.

SUBSTANCE: invention relates to a gas-dynamic devices and concerns the ground development of new ammunition samples, using the barreled powder ballistic facilities (BPBF). Powder charge is placed in the charging chamber. Enter the throwing object to the facility and initiate a charge. At this the throwing object is placed in the barrel at a distance of 2400 mm from the exit of the charging chamber.

EFFECT: higher speed of throwing objects, while reducing the speeding-up path.

3 dwg

Description

The invention relates to gas-dynamic devices.

The primary area of application is ground testing of new ammunition samples using barrel powder ballistic installations (PBU), in particular, aerodynamic, thermradynamic and impact tests.

A known method of throwing, implemented during the operation of a multi-stage propelling piston unit (see AS USSR No. 1639195, IPC ⁵ F41F 1/00, publ. 23.08.92. Bull. No. 31).

The increase in throwing speed at a given size is achieved by introducing additional sequentially located high-pressure chambers that communicate with each other through controlled valves. The experimental use of the analogue is very difficult in terms of optimizing the ratio of the volumes of adjacent high-pressure chambers and synchronizing the operation of controlled valves, while the increase in throwing speed is associated with a significant increase in the load on the missile object due to the non-isentropic increase in gas temperature in high-pressure chambers. The missile object is installed in a multi-stage installation at the outlet of the high-pressure chamber. After the initiation of a charge, when a certain pressure is reached, a shot is fired by a missile body.

Closest to the claimed method is a throwing method, which is implemented during the operation of piston units, according to which a charge is placed in a PBU charging chamber, a projectile is installed, after compression of gas, when the preset pressure value P _c reaches, the projectile collar placed in the charging chamber is cut off and a shot is fired ( see Zlatin N.A., Mishin G.I. “Ballistic installations and their applicability in experimental studies.” M., “Science”, 1974, p. 22). This method is selected as a prototype.

The disadvantage of existing methods of throwing from the PBU is the small size of the projectile volume, limited by the volume of the charging chamber in which the powder charge is placed.

The problem, which is aimed by the claimed method of throwing, is to provide an impact on the missile object, which is closest to the full-scale one.

The technical result from the use of the claimed invention is to provide a higher throwing speed of the object due to better "fullness" of the dependence of the overload of the missile object on time.

The technical result is achieved due to the fact that in the inventive method of throwing from a barrel powder ballistic installation, including placing a powder charge in its charging chamber, introducing a missile to the installation, initiating a charge, in contrast to the prototype, a missile is installed in the barrel at a predetermined distance from the exit from the charging chamber.

As a result of using the totality of the features of the proposed method, an increase in the length of the charge volume occurs, which leads to the possibility of placing in it a powder charge of a larger mass at the same values of the maximum pressure of the powder gases and the maximum overload of the accelerated object, which ensures a decrease in the acceleration path at certain ratios of its length and the length of the projectile volume, a higher speed of the accelerated object when it leaves the barrel due to better “fullness” of the dependence eregruzki acting on the metal object, from time to time.

The invention is illustrated by drawings.

In FIG. 1 schematically shows a barrel gunpowder ballistic installation with a missile object placed in it; FIG. 2 - graphs of the dependencies of the overload acting on the projectile, and its speed versus time.

The inventive method is as follows.

In the barrel powder ballistic installation 1, a powder charge is placed in the charging chamber 2. Throwing object 3 (the dashed line indicates the outline of the throwing object located at the exit of the charging chamber, the solid - when installing it at a given distance) is placed in the barrel 4 at a given distance from the exit from the charging chamber. After that, charge 2 is initiated.

As a result of the proposed method, the length of the projectile volume increases from 0.6 m to 3 m (see Fig. 2a), which leads to the possibility of placing in it a powder charge of a larger mass at the same values of the maximum pressure of the powder gases and the maximum overload of the accelerated object, which ensures, when the acceleration path is reduced with certain ratios of its length and the length of the projectile volume, a higher speed of the accelerated object when it leaves the barrel due to better “fullness” of the overload dependence (see Fig. 2b), acting on a missile object, from time to time.

.According to calculations in a 100 mm gunpowder ballistic installation with a 600 mm long charging chamber and 10,920 mm barrel, deepening an accelerated object weighing 10 kg into the barrel at a distance of 2,400 mm will increase the acceleration speed from 870 m / s to 1050 m / s, t .e. by 20%. In this case, the maximum overload in both cases will be

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Claims (1)

A method of throwing from a gunpowder ballistic installation, including placing a powder charge in its charging chamber, introducing a missile to the installation, initiating a charge, characterized in that the missile is mounted in the barrel at a distance of 2400 mm from the exit of the charging chamber.

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