RU2425323C2 - Device for putting of floating dummy target on water surface - Google Patents

Abstract

FIELD: weapons and ammunition.

SUBSTANCE: device having the possibility of axial rotation includes jet engine with transient bottom, bursting charge with fuse, housing in the cavity of which braking mechanism, radiation source and assembly providing the positive floatability is arranged. Braking mechanism is made in the form of brake head with holes arranged symmetrically relative to its axis, and with safety actuator, and assembly for providing the positive floatability is made in the form of tight telescopic system equipped with pressure accumulator with ignition-retardation mechanism; at that, brake head is connected to tight telescopic system.

EFFECT: higher reliability and efficiency of protection of objects.

2 dwg

Description

The invention relates to pyrotechnic systems for signaling, marking and protecting various objects, mainly floating, serving as a distraction for enemy guidance systems and operating, for example, in the visible and / or infrared (IR) ranges of electromagnetic radiation.

In recent years, various armor systems have been put into service with the armies and navies of many countries, including those using the visible and infrared ranges of electromagnetic radiation, which differ in the type of setting, duration of action, and radiation intensity.

Although modern missile guidance systems, including high-precision ones, use satellite navigation and orientation according to terrain features, they use homing heads when approaching an object of attack, including in the visual-optical range. Therefore, effective protection of objects in this range of electromagnetic radiation remains relevant.

A device is known according to US patent No. 5,895,882 (CL 6 F42B 4/26, 102/341 of 12/08/97), including an elongated body connected to the bow and stern nodes. The housing contains a middle casing in which a payload assembly is mounted. Moreover, the aft unit is attached to the hull with cut-off screws and is equipped with a control signal receiver. The nose unit is equipped with a stabilizer, similar to a propeller, rotating from the incoming air flow, serving as a braking device and cocking a pyrotechnic chain. In the cavity of the payload node are placed cylinders with compressed carbon dioxide, their pruners, a float and a mechanism for filling it, as well as a tank with fuel and a gas generator to create an IR jet.

The known device operates as follows.

After ejecting from an aircraft over a given section of the sea, the device smoothly goes under water due to the stabilizer. There, according to the control signal, a pyrochain is triggered in it, the fastening screws are cut off by the pressure of its hot gases and the feed assembly is shot off. At the same time, compressed gas cylinders are injected, which fill the float, the latter, with its positive buoyancy, ejects a payload node from the body cavity and delivers it to the sea surface. A gas generator is triggered and flared fuel vapors create an infrared jet above the surface of the sea.

The disadvantages of the known device is that it is delivered by plane to a given section of the sea - this circumstance significantly increases the time of setting up protection, and therefore reduces its effectiveness.

The closest to the proposed device for setting a false target on the water surface, described in the journal "Maritime Defense", October, 1978, including a jet engine with a transition bottom, expelling charge with a fuse, a housing in the cavity of which a braking mechanism is placed, a source radiation, a node for ensuring positive buoyancy, which contains an inflatable rubber float, and a parachute is used as a braking mechanism.

The known device operates as follows.

After a shot from a ship’s launcher with a jet engine, it is delivered to a given section of the sea. A command is issued to ignite the charge, to shoot the jet engine and extend the brake parachute (braking mechanism). Next, the shooting of the fastening elements and the extraction of the upper node containing the false target take place. Then, the lower assembly is drawn, containing an inflatable rubber float (positive buoyancy assembly). The splashing and ignition of the IR jet follows. In working condition, the device is held in an upright position by the float and bow of the body serving as a counterweight.

The disadvantages of the known device is that a parachute is used, the use of which delays the time of setting a false target and, therefore, reduces the effectiveness of the protection. In addition, the use of a parachute and an inflatable rubber float reduces the reliability of the device, especially after long-term storage and at extreme atmospheric parameters (gale, minus temperature, etc.).

The technical task is to eliminate these shortcomings, which will lead to acceleration of the setting of a false goal and, therefore, increase protection.

The problem is solved in that the device for placing a floating false target on the water surface includes a jet engine with a transition bottom, a detachable charge with a fuse, a housing in the cavity of which a braking mechanism, a radiation source, and a node for ensuring positive buoyancy are placed. The device is made with the possibility of axial rotation, the braking mechanism is made in the form of a brake head with holes placed symmetrically about its axis, and with a safety-actuating mechanism, and the node for ensuring positive buoyancy is made in the form of a sealed telescopic system equipped with a pressure accumulator with an ignition-retarding mechanism moreover, the brake head is connected to a sealed telescopic system.

The technical advantages of the proposed device compared with that described in the prototype are as follows.

The use of a turbojet engine with a safety-actuating mechanism ensures the reliability of delivery and operation of all systems to achieve the task. In particular, the safety-actuating mechanism initiates the operation of a pressure accumulator, for example, a powder accumulator, only after the expulsion charge is triggered, on the flight path of the device, and the brake head hits the water surface, i.e. at full readiness of the device for immersion.

The use of a braking mechanism in the form of a brake head allows us to save usable volume, regardless of weather conditions, to ensure a given rate of entry into water and the operation of the mechanism for ensuring positive buoyancy. Moreover, the rotation of the brake head, provided, for example, by the use of a turbojet engine, and the presence of holes on it creates the necessary friction force to damp both the angular and linear speed of the device in water, which eliminates the use of a parachute, which is one of the main structural elements of the prototype, reducing efficiency and reliability. The symmetrical arrangement of the holes on the brake head provides stability when entering and moving the device in water.

The use of the mechanism for ensuring positive buoyancy in the form of the design described above can significantly save usable volume, provide the specified duration and height of the radiation source above the sea surface, and also eliminates the use of a rubber float as an element that reduces the reliability of the device (as in the prototype).

The use of a pressure accumulator, for example, a powder accumulator, with an ignition-retardation mechanism as a source of compressed gas, allows us to reduce the occupied useful volume and guarantee the reliability of operation of the mechanism for ensuring positive buoyancy. The use of an ignition-retardation mechanism provides ignition of the radiation source after the pressure accumulator has been triggered with a time delay necessary to complete the deployment of the mechanism for ensuring positive buoyancy, i.e. after delivery of the source to the surface of the sea.

Thus, all of the above distinguishing features that are not identified in the known technical solutions, in their totality, allow us to solve the technical problem and confirm the compliance with the "inventive step" of the proposed technical solution.

The essence of the proposed design is illustrated by the accompanying drawings and a description of them.

Figure 1 shows a longitudinal section of the proposed device in assembled form.

Figure 2 is the same section of the specified device in working form.

The proposed device for placing on the water surface of a floating false target includes a jet engine 1 with a transition bottom, blow-out charge 2 with a fuse, a housing 3, a brake head 4, a sealed telescopic system 5, a clamping bottom 6, a powder pressure accumulator 7 with an ignition-retardation mechanism, as well as a safety-executive mechanism 8 and a radiation source 9. Moreover, the brake head 4 is made in the form of a truncated cone with holes located symmetrically with respect to the axis of the head, the inclination connected to it and deployed in the direction of the angular velocity of rotation. The sealed telescopic system 5 is made in the form of a set of thin-walled metal pipes embedded in each other, held in assembled form by a clamping bottom 6 in the form of a disk. A powder pressure accumulator 7 with an ignition-retardation mechanism is housed in a sealed telescopic system 5. The latter 5 is connected to the brake head 4, which includes a safety-actuating mechanism 8.

The proposed device operates as follows.

The proposed design is assembled fired from a ship launcher, a turbojet engine is delivered to a given point on the trajectory. By the pressure of the powder gases of the expelling charge, the engine is shot back. The device continues to fly along the path, enters the water. At the same time, the brake head quickly damps the angular and linear speeds due to the holes. The safety-executive mechanism is activated from impact on the surface of the water, ignites the powder pressure accumulator. The combustion gases of the latter create pressure inside the sealed telescopic system, causing it to expand and discharge the clamping bottom. Smoothly moving apart, a sealed telescopic system, possessing positive buoyancy, pushes a radiation source above the sea surface. At the same time, through the moderator, the latter ignites. At the end of combustion, the device self-floods.

As shown above and confirmed by full-scale tests of the prototype, the proposed design has proved to be a very reliable and effective floating false target, corresponding to the assigned technical task. Moreover, its main distinguishing features in its combination have significantly improved the reliability of setting a floating false target on a water surface in a given section of the sea and increase the efficiency of object protection.

Claims (1)

A device for placing a floating false target on the water surface, including a jet engine with a transition bottom, blow-out charge with a fuse, a housing in the cavity of which a braking mechanism, a radiation source, a node for ensuring positive buoyancy, characterized in that it is made with the possibility of axial rotation, the braking mechanism is made in the form of a brake head with holes placed symmetrically about its axis, and with a safety-actuating mechanism, and the support unit is positive Buoyancy is formed as a sealed telescopic system provided with a pressure accumulator with an ignition-moderator mechanism, wherein the brake head is connected with a pressurized telescopic system.

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