RU2701630C1 - Method for high-speed firing of cannon armament tower plant - Google Patents

Abstract

FIELD: military equipment.

SUBSTANCE: invention relates to artillery mounts. Method of reduction of mechanical stress in tower plant at high-speed firing, at which kinetic energy of barrel motion at recoil is converted into electric energy, which is converted into heat energy. When the barrel is retracted, the magnet fixed on the rod connected to the shaft induces an electromotive force in the fixed coil. Generated electric current is directed to heating element.

EFFECT: reduction of elastic stress energy in the tower plant housing during firing from a gun with a movable barrel.

1 cl, 1 dwg

Description

The invention relates to the field of rapid-firing cannon weapons and can be used to improve systems for ensuring accuracy of firing.

There is a method of high-speed firing of a turret installation of cannon armament, which consists in converting the kinetic energy of the recoil of the gun barrel into thermal energy [Anti-aircraft missile and cannon system "Shell-C1": Fundamentals of the device and functioning: A training manual. Part 1 / ed. Corr. RANS Dr. Tech. sciences, prof. V.A. Maltseva and Yu.A. Savenkova - Tula: JSC KBP, 2017. - 289 p.].

The known method is implemented by reducing the fluctuations of the entire body of the combat vehicle with a turret by increasing the elasticity of the supporting devices (the use of additional supports), and thereby converting the recoil energy of the gun barrel into the energy of acoustic vibrations of the infrasonic range of individual functional mechanical units and parts. The energy of these vibrations is ultimately dissipated throughout the entire body of the vehicle and converted into thermal energy through the acoustic and optical branches of atomic vibrations in the materials of parts of the combat vehicle.

The disadvantage of this method is that the time constant of dissipation (dissipation) of the recoil energy of the shot is greater than the period of the shots. This leads to the accumulation of uncontrolled energy of oscillatory processes in the nodes of the machine and, accordingly, to disruption of the guidance system. At the same time, increasing the rigidity of the machine supports increases the frequency of oscillatory processes in the machine nodes with a period less than the response time constant of the guidance system. All this limits the ability to provide the required accuracy.

The technical result is aimed at reducing the energy of elastic stresses in the housing of the turret when firing created by the recoil of the gun barrel.

The technical result is achieved by the fact that in the method of high-speed firing of a turret installation of cannon armament, which consists in converting the kinetic energy of the recoil of the gun barrel into thermal energy, the kinetic energy of the recoil of the gun’s barrel is converted into electrical energy, which is converted into thermal energy.

The principle of the proposed method is based on the conversion of the recoil energy of the barrel into electrical energy, which is converted into electric current energy, which is converted into the braking magnetic energy of the barrel and into the heat energy of the heat dissipator.

The figure shows a functional diagram of a device for implementing the proposed method (hereinafter - the device).

The device comprises a barrel 1, a projectile 2 in the barrel, a housing 8, a recoil cylinder 3 and elastic elements 7 connected to the housing, a rod 4 connected to the barrel 1 and elastic elements 7, a magnet 5 connected to the rod 4, an electric coil 6 attached to the housing 8. The recoil cylinder 3 serves as a holder and guide for the barrel 1 during the rollback. The magnet 5 and the coil 6 are made sectionally to increase the magnitude of the induced EMF and increase the efficiency of converting the movement of the barrel with a magnet into electrical energy. A load resistor may be mounted in the coil. Electrical energy can be dissipated through the resistance of a short-circuited coil.

The device operates as follows. When the projectile 2 takes off, the barrel 1 receives a momentum of force in the opposite direction and, when moving in the cylinder 3, the rod 4 compresses the elastic elements 7, which distribute the shock load of the shot to the body 8 and reduce the force acting on the body 8 during the shot. When the rod 4 moves, the magnet 5 induces an electromotive force (EMF) in the stationary electric winding of the coil 6. The electric current generated by the EMF in the coil 6 dissipates energy on the resistance of the coil or a special heating element connected to the coil.

Thus, the kinetic energy of the movement of the barrel 1 by means of a magnet 5 is converted into the energy of an electric current in the winding 6, which is converted in the heating element into thermal energy. According to the law of energy conservation and the practice of generating electric energy, the efficiency of converting mechanical energy into electrical energy can exceed 60%, which depends on the ratio of the interacting masses of barrel 1 and body 8. According to Lenz’s rule, the greater the electric current in the coil of coil 6, the greater the magnetic field of the winding , counteracting the movement of the magnet 5 of the rod 4. The magnitude of the current is greater, the lower the resistance of the winding with the heating element. In the limit, the most effective electromagnetic brake is a short-circuited winding, which acts as a winding for inducing EMF (current) and the heating element.

The amount of energy diverted to heat can be estimated by the magnitude of the induced emf and the resistance of the winding

where E is the electromotive force of the coil, V;

μ is the relative magnetic permeability of the magnet;

μ ₀ is the magnetic permeability of the vacuum, GN / m;

H is the magnetic field of the magnet, A / m;

S is the cross-sectional area of the magnetic flux, m ² ;

Δt is the time of change of the magnetic flux equal to the time of the rollback of the barrel, s;

k is the coefficient of decrease in the average velocity of the barrel relative to the average velocity of the projectile in the barrel.

The induced electric power in the coil, converted into thermal energy, is determined from the equation

where R is the resistance of the entire winding circuit, Ohm.

For example, when possible values of the sold E = 1000 and R = 0,05 ohms, power can reach values of P = 10 ^{6/10 -2} = 10 ⁸ J / s.

When the barrel moves 10 times slower than the projectile t _barrel = 0.1 Δt _cn = 0.06 s, the energy released is W = Pt _barrel = 0.06 10 ⁸ = 10 ⁵ J.

Evaluation calculation shows that the energy of movement of the barrel can be distributed no less than equally between the electromagnetic braking system of the barrel and the body, to which the energy of the barrel is transmitted through the rod and the elastic element, and in the extreme case through the rod 4, magnet 5, magnetic field, coil 6 per case. For such a distribution, the permissible power of the winding 6 of the electromagnet 5, 6 should be greater than the power transmitted through the rod 4 to the housing 8 through elastic elements in the absence of a magnetic field.

When transferring all the energy of the recoil of the barrel to the body through a magnetic field, the work done in the electromagnetic system of the magnet-coil will be equal to the compression work of the elastic element

where I is the electric current of the coil, A;

t is the travel time of the coil, s;

G is the elastic modulus of the elastic element N / m;

Δx is the compression value of the elastic element, m

It is known from practice that the mechanical force acting on the inductor of an electric generator turns into a mechanical force of a magnetic field, called a pondermotor force, which turns into a current in a conductor that does not have and does not cause a mechanical reaction force in the conductor. Thus, mechanical energy characterized by mechanical force can be converted into electrical energy converted into heat without the aid of mechanical force.

A comparative analysis showed that the kinetic energy transmitted by the movement of the barrel to the body can be reduced by half.

Claims (1)

A method for high-speed firing of a turret installation of cannon armament, which converts the kinetic energy of the recoil of the gun barrel into thermal energy, characterized in that the kinetic energy of the recoil of the gun barrel is converted into electrical energy, which is converted into thermal energy.

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