RU2710640C1 - Method for improvement of head multifunctional fuse in breakage of strong obstacles - Google Patents

Abstract

FIELD: weapons and ammunition.SUBSTANCE: invention relates to weapons and can be used in multifunctional detonators for improving article reliability in case of hitting and penetration of strong obstacles. Electronic unit contains nanocomposite filler based on "Vixint PK-68" polymer with 6 % "Dealtom" carbon pipes addition. Adding carbon nanotubes increases the nanocomosite elasticity modulus to 125 MPa, wherein the absorption coefficient of elastic waves remains virtually unchanged.EFFECT: providing protection of radioelectronic elements against impact actions.1 cl, 1 dwg

Description

The invention relates to the field of armaments and can be used in multifunctional fuses to increase the reliability of a product when it enters and breaks through strong obstacles, which ensures their functioning when set to a given action (contact, delayed contact, remote).

Reliability ensures independence of the fuse’s effectiveness from the possible influence of various external and internal factors (weather conditions, adverse meeting conditions with the obstacle, random deviations of parameters and tolerances for the manufacture of mechanical parts, conditions and the fuse’s storage period until it is used).

Increased uptime is achieved due to the high unification of spent assemblies and parts, identical mining conditions, a constant increase in statistics on uptime in field testing and combat use, including as part of new ammunition, as well as through the use of modern nanotechnology.

The elemental base of multifunctional fuses of high-explosive high-explosive shells of tank guns when hit by an obstacle (target) is under the influence of a mechanical shock of a single action with a peak shock acceleration of 150,000 m / s and a duration of 0.1-2 ms. The semiconductor devices that make up the electronic block of a multifunctional fuse are most susceptible to peak mechanical shocks. This leads to impaired functioning and equipment failures due to mechanical deformation and destruction [1, 2].

An often used method of protecting fuses from shock is to fill its electronic components with polymer compounds.

Of the known closest in technical essence is a method of protecting equipment from shock, implemented in a device for protection against mechanical stress [3], according to which a package of printed circuit boards is installed on shock-absorbing gaskets inside one housing, which is filled with discrete working media. The body is made deformable and placed in another rigid body, the space between the bodies is filled with a damping material - a polymer compound.

However, this method does not allow to ensure the reliable functioning of the electronic unit (2) of the multifunctional fuse during shock and vibration when hit in an obstacle (target), since the damping material of the prototype has a low strength. The use of the damping material of the prototype leads to the fact that upon impact on an obstacle, semiconductor devices are destroyed and the electronic unit fails, thereby not ensuring reliable operation of the fuse when set to a given action.

The technical result of the claimed invention is to expand the scope and increase the reliability of a multifunctional fuse after hitting and breaking a solid obstacle in order to hit a sheltered target.

The essence of the proposed method lies in the fact that the electronic components of the electronic unit (2) are placed in the fuse housing (1), the internal volume of which is filled with damping material other than the polymer compound currently used.

Known filling electronic elements polymer "Vixint PK-68." However, “Vixint PK-68” has a small value of the elastic modulus (40 MPa), which does not provide the necessary values of impact resistance and impact resistance of the fuse when breaking through an obstacle.

According to the invention, a composite with high strength, rigidity and hardness, including a polymer with a small percentage addition of multilayer carbon nanotubes, is used as a damping material (15).

The purpose of the invention is the creation of a nanocomposite for the protection of electronic components from shock, with a large coefficient of absorption of elastic waves and a significant coefficient of elastic modulus.

To achieve this goal, it is necessary to fabricate a composite for pouring an electronic unit (2), which includes polymer and multilayer carbon nanotubes (15). Carbon nanotubes have an elastic modulus one order of magnitude higher than that of steel or iridium. A small percentage addition of carbon nanotubes increases the elastic modulus of the nanocomposite to 125 MPa, while the absorption coefficient of elastic waves remains almost unchanged.

In FIG. Figure 1 shows the design of a multifunctional fuse, the electronic components of which are filled with nanocomposite filling based on the Vixint PK-68 polymer with 6% addition of Dealtom multilayer carbon nanotubes (15).

Multifunctional fuse includes the following main elements:

1 - housing;

2 - electronic unit with nanocomposite filling;

3 - receiving coil;

4 - metal protective casing;

5 - a nut;

6 - block;

7 - safety detonating device;

8 - detonator;

9 - pallet;

10 - sleeve;

11 - a sting with a spring;

12 - rotary sleeve;

13 - rubber gasket;

14 - polymer casing;

15 - carbon nanotubes.

The electronic block with nanocomposite filling based on the Vixint PK-68 polymer with 6% addition of carbon nanotubes Dealtom has a large wave energy absorption coefficient and a significant elastic modulus, thereby providing the necessary values of impact resistance and impact resistance of the electronic block upon impact and penetration of a strong barrier and the reliability of the fuse as a whole.

List of sources used:

1. Testing of electronic, electronic computing equipment and testing equipment / ed. A.I. Korobov. - Moscow: Radio and Communications, 2002. - 272 p.

2. Fedorov V., Sergeev N., Kondrashin A. Control and testing in the design and manufacture of electronic equipment - Technosphere, 2005. - 504 p.

3. Ivanov A.V., Ilyin S.L. Device for protection against mechanical stress. - FIPS. Patent for invention No. 2302091 dated 06/27/2007 Bull. Number 18.

Claims (1)

A way to increase the reliability of the head multifunctional fuse when breaking through strong obstacles, characterized in that the electronic unit of the multifunctional fuse contains a nanocomposite polymer-based “Viksint PK-68” with 6% addition of carbon nanotubes “Dealt”, has a large wave energy absorption coefficient and elastic modulus up to 125 MPa, thereby providing the necessary values of impact resistance and shock resistance of the electronic unit when it enters and breaks through a solid obstacle and explosion-proof reliability Atelier in general.

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