RU48405U1 - CASE OF THE STEM POWDER POWDER BALLIST INSTALLATION - Google Patents

Abstract

The utility model relates to gas-dynamic devices. The primary field of application is barrel powder ballistic installations for aerodynamic research. The barrel sleeve of a gunpowder ballistic installation consists of a housing and a cover with one or more holes mounted on the front end of the housing facing the propelled object. Replaceable plugs can be installed in the part of the cover openings. In the case of the sleeve placed igniter and powder charges, in the bottom of the case placed the initiating device. The design of the utility model allows for stable combustion and complete combustion of the powder charge with the gradual outflow of combustion products into an adjacent (slug) volume and thereby increase the muzzle velocity reproduction stability.

Description

The utility model relates to gas-dynamic devices. the primary field of application is barrel powder ballistic installations for aeroballistic research.

The well-known "Gas-dynamic source of pressure", RU, patent No. 21595926, publ. 08/03/1999, containing a hollow body with a consumable hole in which the powder charge and the means of ignition are placed. The body cavity is divided by a perforated partition into two compartments, one of which contains a charge from an explosive with its initiating device, and the other contains a powder charge. The disadvantage of such a pressure source when used in barrel ballistic installations is the low stability of the parameters of the shot during aeroballistic research in the field of subsonic, transonic and low supersonic speeds. This circumstance is connected with the fact that for communicating such speeds to low-mass missed objects, such as aerodynamic models, low (P ≤ 30-40 MPa) pressures are required, at which even the most finely dispersed gunpowder burn unstably and do not have time to completely burn out while the object in the trunk.

Closest to the proposed technical solution is the "Artillery Shot" (Ammunition arrangement), patent No. 37776136, publ. 1973, selected as a prototype. The shell of the artillery shot contains an inner cover that changes its longitudinal dimensions in the direction of increase as a result of plastic deformation of the material from which it is made, when burning a powder charge. The disadvantage of this design is that such a cover allows only one-time use, while in the process of firing its elements thrown out, can damage the object being thrown.

The technical problem to be solved is the creation of conditions for the stable combustion of the powder charge of a barrel ballistic installation. The technical result achieved by using the proposed solution: improving the stability (accuracy of the calculated forecast) of the muzzle velocity of the missile objects, and, therefore, the credibility of aeroballistic experiments.

The technical result is achieved through the use of the barrel sleeve of a powder ballistic installation, consisting of a housing with a cavity for placing a powder charge, an initiating device and a cover mounted on the front

the end of the housing, in which it is proposed to make one or more holes. Removable plugs may be installed in the part of the cover openings.

A comparative analysis of the proposed solution and the prototype shows that the claimed utility model is characterized by a combination of new design features:

- the presence of one or more holes in the lid;

- the presence of removable plugs installed in the holes of the cover.

The presence of one or more openings in the lid allows creating such a pressure of powder gases in the liner at which stable combustion and complete combustion of the charge will be ensured while the missile is in the barrel of the ballistic installation.

The presence of removable plugs installed in the openings of the lid allows you to quickly change the area of the holes of the outflow of powder gases from the sleeve into the adjacent (slug) volume and, due to this, realize approximately the same value of the maximum pressure of the powder gases in the sleeve when burning powder charges of different masses in it and inform throwing object various speeds. The same effect can be achieved if, instead of using removable plugs in one cover, use, for example, a set of covers with holes of different diameters.

The cover is reusable.

In FIG. shows a structural diagram of the inventive liner barrel powder ballistic installation, where:

1 - shell case;

2 - cover;

3 - cover holes;

4 - powder charge;

5 - igniter;

6 - initiating device;

7 - removable plugs.

The proposed sleeve works as follows.

When an electric pulse acts on the initiating device 6, the last one fires and ignites the igniter 5, the combustion products of which ignite the powder charge 4. The combustion products of the powder charge and the ignitor through the hole (s) of the cover 2 expire in an adjacent (slug) volume, where they do useful work - accelerate a missile in the barrel of a ballistic installation. At the same time, the presence of holes in the lid and the ability to plug part of them

they allow realizing the gradual outflow of the products of combustion of the powder charge into the projectile volume, maintaining the pressure of the powder gases in the sleeve at which the powder burns steadily and completely burns out while the missile is in the barrel. Due to this, the random dispersion of the muzzle velocity of the propelled object and is reduced. as a result, the credibility of aeroballistic experiments increases.

Claims (2)

1. The sleeve of the barrel powder ballistic installation, consisting of a housing with a cavity for accommodating a powder charge, an initiating device mounted on the bottom of the housing, and a cover mounted on the front end of the housing facing the propelled object, characterized in that the cover is made according to at least one supply port. 2. The sleeve according to claim 1, characterized in that removable plugs are installed in the part of the cover openings.