RU2084800C1 - Firearm barrel - Google Patents

Abstract

FIELD: firearm rifled barrels. SUBSTANCE: after ignition of the propellant charge the shot starts moving along the rifles, which restrain the linear acceleration providing at the same time for angular acceleration; the pressure in the downstream side of the shot rises. During motion of the shot in the bore of the barrel front part the rifles provide for obturation, the angular velocity does not increase, the action of powder gases is directed for linear motion of the shot. EFFECT: improved design.

Description

 The invention relates to the field of armament, namely to the trunks of firearms, and can be used to create rifled weapons.

 The barrel of a firearm is known, which provides mainly linear acceleration of the projectile (see A.N. Latukhin. Antitank weapons. M. Military Publishing House of the USSR Ministry of Defense, 1974, p. 161).

 In the well-known barrel there is no expenditure of energy of powder gases on the rotation of the projectile. Therefore, the combustion of a warhead takes place in a rapidly increasing volume, which leads to a decrease in the pressure of the powder gases in the bore and the muzzle velocity of the projectile is limited.

 A well-known barrel of firearms having grooves made at an angle to the generatrix, providing linear and angular acceleration of the projectile (see A.N. Latukhin, Modern artillery. M. 7 Military Publishing of the USSR Ministry of Defense, 1970, p. 70).

 The disadvantage of this barrel is the energy consumption of the powder gases on the rotation of the projectile when it moves along the front of the barrel, after the pressure reaches its maximum value, which limits the muzzle velocity of the projectile and the power coefficient.

 Closest to the invention in technical essence is a barrel of a firearm containing a cylindrical channel, including sections with different steepness of rifling (see N. Nikiforov. Fundamentals of the device of the material part of artillery, Military Publishing, M. 1936, p. 98-99).

 The disadvantage of this weapon is the expenditure of energy of the powder gases on the rotation of the projectile when moving along the front of the barrel, after the pressure reaches its maximum value, which limits the muzzle velocity of the projectile and the power of the weapon. In addition, when using cumulative projectiles in this weapon, the cumulative stream of the latter is eroded due to the rotation of the projectile, which also limits the power of the weapon.

 The aim of the invention is to increase the specific velocity of the projectile and the power of weapons.

This goal is achieved by the fact that in the barrel of a firearm containing a cylindrical channel, including sections with different steepness of the rifling, the front section is made with decreasing towards the muzzle cut angle of the rifling of the rifle to the generatrix, providing mainly linear acceleration of the projectile and the defined ratio
Φ (l) = arcctg [1000v (l) / (πdn)],
where l is the coordinate of the linear displacement of the projectile; v (l) linear velocity of the projectile at a point with coordinate l, m / s; d caliber; n muzzle velocity of the projectile, r / s.

 The barrel of a firearm contains a rear part having rifling, made at an angle to the generatrix, providing linear and angular acceleration of the projectile, and also a front part, providing mostly linear acceleration of the projectile, made by a rifled one, with the angle of inclination of the rifling to the generatrix decreasing towards the muzzle, defined by the relation: Φ (l) = arcctg [1000v (l) / (πdn)], where l is the coordinate of the linear displacement of the projectile; v (l) linear velocity of the projectile at a point with coordinate l, m / s; d caliber; n muzzle velocity of rotation of the projectile, r / s, with a caliber equal to the caliber of the rear part, and its rifling and rifling of the rear part at the junction of both parts coincide.

 The phenomenon of the shot is as follows. When a combat charge is ignited, a pressure of powder gases develops from the projectile region. When the boost pressure is reached, the projectile begins to move along the channel of the rear of the barrel. At the same time, the rifling inhibits the increase in linear velocity, while simultaneously providing the angular acceleration of the projectile, as a result, the amount of produced gases grows faster than the volume of the projectile space, the pressure quickly rises and the maximum value is reached. At the moment the projectile transitions from the rear of the barrel to the front, the angular velocity reaches its maximum value. When the projectile moves along the channel of the front of the barrel, the rifling provides only an obturation of the powder gases. The angular velocity does not increase, the work performed by gases is aimed mainly at increasing the kinetic energy of the linear movement of the projectile.

 Thus, the proposed barrel, unlike the prototype, has a simpler design, which allows to expand the scope of its application, increase the muzzle velocity of the projectile while increasing the power coefficient, as well as survivability and economy, the latter being ensured by the use of shells of a conventional design.

 The effectiveness of the barrel of a firearm is caused by an increase in ballistic characteristics due to a more complete use of the energy of powder gases, which will increase the tactical and technical data of rifled weapons.

Claims (1)

The barrel of a firearm containing a cylindrical channel, including sections with different steepness of the rifling, characterized in that the front section is made with decreasing in the direction of the muzzle cut the angle of inclination of the rifling to the generatrix, providing mainly linear acceleration of the projectile and a defined ratio
Φ (l) = arcctg [1000v (l) / (πdn)],
where l is the coordinate of the linear displacement of the projectile;
V (l) linear velocity of the projectile with a point with coordinate l, m / s;
d caliber;
n muzzle velocity of the projectile, r / s.