RU2411444C1 - Controlled shell - Google Patents

Abstract

FIELD: weapons and ammunition.

SUBSTANCE: shell comprises body, closing stabiliser, transceiving device and tray. Closing stabiliser is fixed on body with shear pin. Tray includes a tilter, fixed with a clearance on its back end. Tray is arranged in the form of two coaxial equidistant rings fixed to each other along internal surfaces by shell. Rings with shell form through asymmetric hole with segment cheek, height of which makes 0.25…0.35 of external diametre of tilter. Coaxial equidistant rings form a pocket open from external side, width of which makes 0.05…0.15 of external diametre of tilter.

EFFECT: improved reliability of target killing.

4 dwg

Description

The present invention relates to the field of artillery guided projectiles with transceivers located in the rear of the projectile and closed from the influence of propellant gases by a sump dumped on the trajectory.

Known artillery shell containing a housing, a transceiver and a detachable pallet. The pallet is used to protect projectile elements from the effects of propellant gases of a propellant charge. The separation of the pallet is ensured by the gas pressure from the combustion of the pyrotechnic elements, ignited at a certain point in the shot of the projectile from the barrel. After separating the pallet, the projectile transmitting and receiving device opens, ensuring the passage of commands on board the projectile from a control source, for example, along a laser beam [1].

However, the described design for separating the pallet has a complex device, and hence low reliability.

An analysis of the state of the art in this field has made it possible to identify a technical solution to a similar problem used in the known design of an artillery guided projectile [2].

This projectile contains a housing that covers the stabilizer and the transceiver, a pan and a piston, separated by powder gases on the trajectory after the projectile leaves the barrel of the artillery gun. The pallet discharge assembly is made in the form of gas inlet jets located in bolts mounted in the pallet and piston and twisted, spring-tightened spring ties with the possibility of transferring energy to the piston after cutting the mounting pin that rigidly connects the pallet to the shell of the projectile. At the same time, filters are provided at the inlet of the jets.

The described design provides reliable separation of the pallet on the trajectory after the exit of the guided projectile from the barrel of the artillery gun.

The disadvantage of the described design is that the pallet after dropping for a long time follows the inertia of the projectile and thereby closes (obscures) the line of sight between the transceiver located in the tail compartment of the guided projectile and ground control equipment. At the same time, during this time of shading, the guided projectile can go beyond the diameter of the control beam and not hit the target.

The technical task of the invention is to increase the reliability of hitting a target with an artillery guided projectile by reducing the shadowing time of the transceiver device by the pallet when it is separated.

The achievement of the technical task is provided by the following design solutions. An artillery guided projectile containing a housing on which a stabilizer and a transceiver tray with a piston are secured with a shear pin, separated by powder gases after the projectile goes beyond the muzzle of an artillery gun. Powder charges of a propellant charge flow when fired into the pan through the gas inlet jets.

In this case, the pallet is equipped with a tipper, fixed with a gap at its rear end. The tipper is made in the form of two coaxial equidistant rings bonded to each other on the inner surfaces by a shell forming a through asymmetric hole with a segmented cheek, the height of which is 0.25-0.35 of the outer diameter of the tipper.

In this case, the coaxial equidistant rings form a pocket open from the outside, the width of which is 0.05-0.15 of the outer diameter of the tipper.

The invention is illustrated by drawings, where figure 1 shows a General view of an artillery guided projectile; figure 2 - the tail of the projectile with the pallet in the context; figure 3 is a view along arrow A on the tail of the projectile, figure 4 is a cross-section along BB in figure 3, which shows the mounting of the tipper to the pallet.

An artillery guided projectile contains a housing 1, in which a jet engine 2, a warhead 3, a control unit 4, stabilizers 5, a transceiver 6, a pallet 7 are placed. The inner pallet 8 holds stabilizers 5 in a folded position and seals the receiver with a sealant 9 a transmitting device 6 mounted in the piston 10. The inner cavity 11 of the pallet is connected to the projection space by gas inlet nozzles 12 with filters 13 formed in the bolts 14. The pallet is fixed to the projectile by a shear pin Volume 15. At the rear end of the pallet with a gap 16 bolts 14 are fixed, the tipper 17, made in the form of two coaxial equidistant rings 18, fastened along the inner surfaces by a shell 19, forming a through asymmetric hole 20 with a segment cheek 21. The coaxial equidistant rings form open from the outside pocket 22. In this case, the height H of the segmented cheek 21 is 0.25 ÷ 0.35 of the outer diameter D of the tipper 17, and the width C of the pocket 22 is 0.05 ÷ 0.15 of the outer diameter of the tipper.

The operation of the described device is as follows.

When fired from an artillery gun, part of the gas from the propellant’s combustion through the nozzles 12 with filters 13 flows into the internal cavity 11 of the pallet 7 for the entire duration of the projectile’s movement along the barrel. The area of the nozzles is calculated based on the maximum allowable pressure of the powder gases in the pan. After the back end of the projectile exits the barrel, the pin 15, which holds the tray on the projectile, is cut off by the pressure of the powder gases. After this, a sharp discharge of the sump with the piston along the axis of the projectile begins, thereby blocking the transceiver from the incident laser beam. After dumping the pallet, the tipper 17 mounted on the end face of the pallet 17 through the gap 16 is affected by the force of the incoming air flow, which, due to the asymmetry of the areas of the axial hole 20 of the tipper, creates a tilting moment. This overturning moment will mainly depend on the difference between the areas of the segmented cheek 21 with the height H and the outer diameter D of the tipper 17. The tipping effect is increased by the pocket 22, which, when tilted to the axis of movement of the pallet, creates an additional tipping moment, determined by its width C. When working with different by the ratios of the height H of the segmented cheek 21 and the diameter D of the tipper, the effect best obtained by the time of the pallet withdrawal from the trajectory was obtained at Н = 0.25 ÷ 0.35D. This is explained by the fact that when the ratio is less than 0.25, the obtained moment does not provide the tipping of the pallet during the subsidence under the influence of the gravity of the projectile on the radius of the control beam, which leads to a miss. With a ratio greater than 0.35, the created moment does not lead to a significant withdrawal of the pallet from the path, because the segmented cheek will be located closer to the axis of the pallet, which reduces the overturning moment from the incoming air flow.

The best efficiency for the ratio of the width C of the pocket 22 and the diameter D of the tipper 17 during the tests was obtained at C = 0.05 ÷ 0.15D. With a width C of less than 0.05 D, the time for the pallet to move away from the trajectory also does not provide the necessary tipping dynamics, and with C greater than 0.15 D, the projectile's long dimensions, which are unacceptable in technical parameters, increase.

The guaranteed gap 16 between the tipper and the end of the pallet is necessary both to increase the efficiency of the tipper and to prevent the formation of blind cavities between the end of the pallet and the tipper due to a loose fit and to prevent unauthorized deformation of the tipper when the bottom of the projectile passes through the muzzle brake of the gun.

Experimental studies of the claimed device of an artillery guided projectile showed that, compared with a device of a similar purpose (prototype), the claimed device allows to reduce the uncontrolled flight area by at least 1.3 times.

According to the proposed technical solution, an experimental batch of artillery guided shells was manufactured, which passed laboratory-bench and firing tests with positive results.

Information sources

1. FR, application 2665763, cl. F42B 10/38, 1992 - analogue

2. RF patent No. 2096733, cl. F42B 14/06, 1995 - prototype.

Claims (1)

An artillery guided projectile containing a housing on which a closing stabilizer and a transceiver are fastened with a shear pin, a pan with a piston separated by powder gases after the projectile passes through the gas inlet jets, characterized in that the pan is equipped with a tipper fixed with a gap at its rear end and made in in the form of two coaxial equidistant rings bonded together on the inner surfaces of the shell, forming a through asymmetric hole with a segmented cheek, the height of which 0.25 ÷ 0.35 of the outer diameter of the tippler, the coaxial rings equidistant form an open pocket on the outer side, the width of which is 0.05 ÷ 0.15 of the outer diameter of the tippler.

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