RU2327944C1 - Method for automatic determination of corrections for bore wear of artillery weapon during ballistic preparation of firing - Google Patents

Abstract

FIELD: weapons and ammunition.

SUBSTANCE: invention relates to methods of ballistic preparation of artillery weapons for firing. It proposes a method for automatic determination of a correction for bore wear to the projectile muzzle velocity during ballistic preparation of firing. The wedge breechblock of a gun contains a gas flow sensor installed therein. A pressurised volume of the charge chamber is determined by supplying gas into the chamber through the gas flow sensor. A signal from the gas flow sensor is read in automatic mode, the value of which is proportional to the charge chamber volume and to the bore wear. An allowance for this value is made while calculating a correction for bore wear to the projectile muzzle velocity.

EFFECT: enhancement of firing effectiveness; reduction in time required for ballistic preparation of firing and exclusion of the operations of bore wear measurement in firing position.

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Description

The invention relates to a method for ballistic preparation for firing artillery guns with a threaded bore and can be used for ballistic preparation for firing in automatic mode of self-propelled artillery guns having an automatic loading mechanism (mechanism).

The ballistic preparation of the gun includes the definition of corrections for firing due to [1]:

- wear of the channel of the gun barrel;

- deviations from the normal (+ 15 ° C) temperature of the propelling charge;

- changes in the properties of a batch of propellant charges;

- ballistic characteristics of shells.

The invention provides a method for determining the correction for firing due to wear of the gun barrel. The prototype of this invention is the invention RU 2282813 C1 (IPC F41G 3/12, F41G 31/100) from 06/07/2005 [2]. An analogue of the invention is the invention RU 2206042 C2 (IPC F41G 3/12) dated 03/10/2006 [3].

When firing artillery pieces with a rifled bore, wear is characterized by an extension of the charging chamber, which leads to an increase in its volume and a decrease in the initial velocity of the projectile [1]. For full-time artillery guns, upon reaching the maximum allowable wear, a decrease in the initial velocity of the shell reaches 6%, which corresponds to a range error of up to 1 km [4].

At present, the wear of the barrel channel of rifled guns is determined by lengthening the charging chamber manually using the PZK device [1, 4]. The measured elongation of the charging chamber using firing tables or computing devices determine the correction for firing. The time to deploy the PZK device, prepare it for operation and determine the parameter for the six-gun battery reaches 30 minutes. Determination of the initial velocity of the projectile due to wear of the barrel can be determined by the results of firing using an artillery ballistic station and the time to determine the parameter for the battery reaches 15 minutes. In addition, to increase the efficiency of firing of artillery guns with various wear in the division, batteries are re-equipped with guns with a barrel bore similar in wear [1].

The disadvantages of these methods are obvious. They are inoperative, time-consuming, require additional measures. And the use of an artillery ballistic station is not applicable for sudden short firing raids, the rate of fire of the gun more than 5 rounds per minute and when firing high-precision ammunition.

The technical result of the present invention is the automated determination of corrections for firing due to wear of the barrel when loading an automatic (mechanism) loading artillery guns.

This result is achieved by the fact that the method of automatically determining the correction for the wear of the barrel of an artillery gun at the initial velocity of the projectile during ballistic firing includes the following operations: install a gas flow sensor in the gun’s wedge, determine the airtight volume of the charging chamber by supplying gas to the chamber through the gas flow sensor, in an automated mode, the signal is read from a gas sensor, the value of which is proportional to the volume of the charging chamber and the wear of the channel barrel, and take this value into account when calculating the correction for wear of the barrel in the initial velocity of the projectile. The invention is illustrated in the drawing.

According to the invention, it is proposed that a gas flow sensor 3 be installed in the gate wedge 1 with the hammer 2. When the projectile 5 is sent to the threaded barrel 4 channel and the shutter wedge is closed, the charging chamber will be a sealed volume withstanding pressure of at least 15 MPa. A gas (air or other) is supplied to this volume through a gas sensor, the flow of which stops when a certain pressure is reached, and a signal proportional to the volume of the charging chamber and barrel wear is read from the gas sensor, the value of which is automatically taken into account when calculating and introducing the correction at the initial velocity of the projectile.

The invention allows: 1) to increase the efficiency of firing, taking into account the correction for firing for wear of the barrel with each shot; 2) reduce the time of ballistic shooting training; 3) to exclude measures at the firing position for measuring the wear of the bore of the gun barrel and for the selection of guns in the divisions on the loose.

Information sources

1. The rules of firing and fire control artillery. Division, battery, platoon, gun. PS and UO-96. Part 1. - M .: Military publishing house, 1996. - 375 p.

2. Patent RU 2282813 C1 (IPC F41G 3/12, F41G 31/100) dated 07.06.2005.

3. Patent RU 2206042 C2 (IPC F41G 3/12) dated 03/10/2006.

4. Shooting tables for lowland and mountainous conditions of the 152 mm howitzer 2A65 and the 152 mm self-propelled howitzer 2C19. TS RG No. 187. - M.: Military Publishing House, 1994. - 760 p.

Claims (1)

The method for automatically determining the correction for wear of the barrel of an artillery gun at the initial velocity of the projectile during ballistic firing, characterized in that a gas-flow sensor is installed in the gun’s wedge, the hermetic volume of the charging chamber is determined by supplying gas to the chamber through the gas-flow sensor, the signal is read out in an automated mode from a gas sensor, the value of which is proportional to the volume of the charging chamber and the wear of the barrel, and take this value into account when calculating pop avki on barrel wear in projectile muzzle velocity.