RU2267079C2 - Separate loading round to tank guns - Google Patents

Abstract

FIELD: applicable in designing of propellant charges for rounds to tank guns of medium and large calibers.

SUBSTANCE: the separate loading round has a shell and main and additional charges isolated from each other. The additional charge attached to the shell is made of tubular components of pyroxylin and ballistic powders, the relation of the area of the ballistic powder end surface in the bottom part of the additional charge and the cross-sectional area of the additional charge makes up 0.1-0.3.

EFFECT: provided satisfactory functioning of the round in the whole range of operating temperatures and enhanced shell velocity.

1 dwg, 1 tbl

Description

The invention relates to the field of artillery weapons and can be used in the design and modernization of propellant charges (MH) for separate-charge shots for tank and anti-tank guns.

Separate-loading shots, for example, with armor-piercing projectiles (BPS), consist of the main and additional parts of the charge isolated from each other.

Separate loading shots are known, described in the Handbook of Artillery Ammunition to be Utilized and Destroyed by the Nova Publishing House, 1992 on pages 89-93, consisting of a main charge of both pyroxylin and ballistic gunpowder and an additional charge of pyroxylin gunpowder. The main and additional charges are enclosed in sealed combustible shells.

The development of tank artillery requires increasing the effectiveness of the shells at the target, which can be achieved by increasing their initial speed.

An increase in the initial BPS speed, in turn, can be achieved through the use of powerful ballistic powders in the MOH, for example, APTs-235P, NDGP, NDGPO and others. The introduction of powerful ballistic powder in both charges is the best option to increase the power of the MOH and maximize the initial velocity of the projectile. However, shots containing only ballistic gunpowder in an additional charge did not find practical application due to the fact that the safety of the functioning of the elements of the shot and the cannon assemblies is not ensured when firing at low temperatures.

A separate loading shot, taken as a prototype, is described in RF patent No. 2192610, IPC F 42 B 5/38, 2002. The shot consists of a main charge placed in a cartridge case with a burning body and an additional charge on the projectile used with the main charge and consisting of bundles of tubular pyroxylin and ballistic powders. Bundles of gunpowder are fixed to the salted part of the projectile. The disadvantage of the prototype is that it does not provide a requirement for the initial velocity of the projectile.

The task of the invention is to increase the initial speed of the BPS tank guns with the normal functioning of the MOH and the shot.

To achieve the specified technical result in the Ministry of Defense for a separate charge shot, including the main charge and the additional charge mounted on the projectile, the additional charge is made of tubular ballistic and pyroxylin gunpowder, while the ratio of the end surface of ballistic gunpowder (S _PS ) in the bottom of the additional charge to the cross-sectional area of the additional charge (S _DZ ) is 0.1-0.3.

The proposed shot separate loading to tank guns is shown in the drawing.

The proposed separate loading shot for tank guns consists of a main charge 1, an additional charge 2 attached to the projectile 3. The main charge consists of gunpowder 4, igniters 5, 6, a flame arrester 7, a sleeve 8 with a metal pan 9, an igniter capsule 10. Additional charge 2 consists of pyroxylin powder 11, ballistic powder 12. An additional charge is enclosed in a burning shell 13.

The work of the shot is as follows. The gun firing system activates the igniter capsule 10 mounted in the pan 9 of the sleeve 8, after which the force of the flame ignites the powder of the lower igniter 5, which transmits the ignition pulse to the powder of the upper ignitor 6 and ignites the powder 4, flame-retardant powder 7 and the sleeve 8. The force of the flame from gunpowder 6 destroys the burning sleeve 8 and the burning shell 13 and ignites the pyroxylin powder 11, ballistic powder 12 and the burning shell 13 of the additional charge 2.

The experiments conducted by firing a cannon with the proposed design of the MOH showed satisfactory operation in the entire temperature range of operation, while the increase in the initial speed was 2-6%. The results of the firing tests are shown in the table.

Table. The results of firing tests. No. p.p Propellant charge S _PSU / S _DZ Temperature
charge
Т _МЗ , ° С Functioning Speed increment in
compared with the regular MOH,% 1 2 3 4 5 6 1 The main charge of pyroxylin powder. Additional charge of the proposed design less than 0.1 +15
+50
-40
-fifty normal functioning of the elements of the shot and the gun - 2 The main charge of pyroxylin powder. Additional charge of the proposed design 0.1-0.3 +15
+50
-40
-fifty normal functioning of the elements of the shot and the gun increment of the velocity of the projectile by
2-4% 3 The main charge of pyroxylin powder Additional charge of the proposed design more than 0.3 +15
+50
-40 at minus 40 ° С excess of pressure is higher than admissible and dismantle of a shell. propellant does not meet performance requirements 4 The main charge of ballistic gunpowder. Additional charge of the proposed design less than 0.1 +15
+50
-40
-fifty normal functioning of the elements of the shot and the gun - 5 The main charge of ballistic powder Additional charge of the proposed design 0.1-0.3 +15
+50
-40
-fifty normal functioning of the elements of the shot and the gun increment in projectile speed by 2-6% 6 The main charge of ballistic powder Additional charge of the proposed design more than 0.3 +15
+50
-40
-fifty at minus 40 ° С excess of pressure is higher than admissible, at minus 50 ° С dismantle of a shell propellant does not meet performance requirements

The table shows that although the MZ at a ratio of S _BP / S _DZ less than 0.1 (items 1, 4) satisfies the requirements for functioning, the projectile speed does not increase (the change in speed is within the speed of shells with standard propelling charges from the party to the party).

When shooting with projectile charges of the proposed design, when S _BP / S _DZ is in the range 0.1-0.3 (paragraphs 2, 5 of the table), the normal functioning of the elements of the propellant charge and the shot as a whole and a significant increase in the initial velocity of the projectile by 2-6%.

When the ratio S _BP / S _DZ is more than 0.3 (items 3, 6), the propellant charge does not ensure the normal functioning of the shot elements (the shell is dismantled when firing at a charge temperature of minus 40 ° C) and does not satisfy the requirements for the propellant charge.

The present invention is planned to be used in the design and modernization of propellant charges for shots of separate loading.

Claims (1)

A shot of separate loading to tank guns, including a projectile, a main charge and an additional charge placed on the projectile, the additional charge being made of tubular pyroxylin and ballistic gunpowder, characterized in that the ratio of the end surface area of ballistic gunpowder in the bottom of the additional charge to the cross-sectional area additional charge is 0.1-0.3.