CN111238311A - Solid gas generating device for infrared bait - Google Patents

Abstract

The invention belongs to the technical field of simulation, and relates to a solid gas generating device for infrared baits. The solid gas generating device for the infrared bait comprises a combustion chamber shell with an opening at one end, wherein a solid grain is arranged in the combustion chamber shell; the tail part of the combustion chamber shell is provided with a nozzle seat; the nozzle base is provided with an igniter and a gas nozzle; the tail part of the nozzle base is provided with a cooling chamber; the cooling chamber is communicated with an internal cavity of the combustion chamber shell through a gas nozzle on a nozzle seat; a cooling bag matched with the inner cavity of the cooling chamber is arranged in the cooling chamber; the front end of the cooling chamber is communicated with the inner cavity of the combustion chamber shell, and the rear end of the cooling chamber is provided with a rear baffle plate used for enclosing the cooling envelope in the cooling chamber; the rear baffle is provided with a plurality of circular through holes. The invention effectively avoids the high-temperature high-speed gas from impacting the folded balloon body at a short distance, and ensures that the balloon body is not damaged by the high-temperature gas.

Description

A solid gas generating device for infrared bait

technical field

The invention belongs to the technical field of aerospace science and technology, and particularly relates to a solid gas generating device for infrared bait.

Background technique

Inflatable balloon infrared decoy is a kind of infrared decoy. By simulating the infrared characteristics of the target to be protected, it interferes with the guidance system of various infrared-guided weapons, and deceives the infrared-guided weapons to attack the false target, so as to achieve the purpose of protecting the real target. The inflatable balloon infrared bait is folded and stored in the target to be protected; when the inflatable balloon is thrown out, the heat source device generates high-temperature gas, which is inflated into the folded balloon; After the body starts to simulate the infrared characteristics of the protected target until the end of the work.

The solid gas generating device has the advantages of simple structure, few parts and reliable operation, and can quickly generate the high-temperature gas required by the inflatable balloon, thus becoming the preferred heat source device for the inflatable balloon. However, in the application process of the solid gas generating device, its shortcomings have also been found. During the initial inflation, the high-temperature and high-speed gas generated by the solid gas generating device impacts the folded balloon body at close range, which is easy to cause burn-through damage to the balloon body. Therefore, it is necessary to improve the gas generator for inflatable balloons in view of the above-mentioned shortcomings.

SUMMARY OF THE INVENTION

The purpose of the present invention is to propose a solid gas generating device for infrared bait, which can meet the needs of the heat source of the inflatable balloon while avoiding the damage to the balloon body during initial inflation.

To achieve the above object, the present invention adopts the following technical solutions:

A solid gas generating device for infrared bait, the solid gas generating device has a combustion chamber shell with one end open, a solid grain column is installed in the combustion chamber shell; A nozzle holder; an igniter and a gas nozzle are arranged on the nozzle holder; a cooling chamber is provided at the rear of the nozzle holder; the cooling chamber passes through the gas nozzle on the nozzle holder and the inner air of the combustion chamber shell The cavities are connected to make the high-temperature gas in the combustion chamber shell enter the cooling chamber; the cooling chamber is provided with a cooling bag matched with the inner cavity of the cooling chamber; the cooling bag gradually absorbs the heat of the high-temperature gas, The temperature of the discharged high-temperature gas is reduced; the front end of the cooling chamber is communicated with the inner cavity of the combustion chamber shell, and the rear end of the cooling chamber is provided with a rear baffle for sealing the cooling bag in the cooling chamber; the rear baffle There are a plurality of circular through holes on the board, and the plurality of circular through holes fill the cooled gas into the infrared bait of the inflatable balloon located in the target to be protected, so that the volume of the inflatable balloon expands; , the gas gradually recovers the high temperature, enters the inflatable balloon and quickly reaches the required temperature on the surface of the inflatable balloon.

The cooling bag is an open-cell porous metal material; the shape of the porous metal material is cylindrical; the metal porous material is made of high temperature resistant metal, such as foamed iron nickel, stainless steel sintered wire mesh, stainless steel powder sintered Porous material.

The cooling bag is a cylindrical chemical cooling agent located in the cooling chamber; the chemical cooling agent is provided with a plurality of circular through holes; the chemical cooling agent contacts the high-temperature gas discharged from the gas nozzle and will be pyrolyzed and decomposed. The heat of high temperature gas is absorbed; the time when all the pyrolysis of the chemical cooling agent is completed is less than the gas discharge time of the gas nozzle.

The front part of the chemical cooling agent is installed with a front baffle; the front baffle is provided with a plurality of circular through holes, and the diameter and position of the circular through holes are the same as those of the chemical cooling agent.

The chemical cooling agent is polymethyl methacrylate.

The middle part of the front baffle plate is provided with a positioning boss, and the middle part of the chemical cooling agent is provided with a concave cavity matched with the positioning boss.

The rear baffle and the cooling chamber are connected by flanges and sealed by a sealing ring.

The solid gas generating device for infrared bait proposed by the present invention absorbs the heat of high temperature gas through metal porous material or chemical cooling agent in the initial stage of operation of the gas generating device, so as to reduce the temperature of the discharged high temperature gas; Multiple through holes on the baffle enter the folded inflatable balloon to expand the volume of the inflatable balloon; after that, with the end of the cooling package, the gas gradually recovers to high temperature, enters the balloon and quickly reaches the required temperature on the surface of the balloon. The gas generating device reduces the initial gas temperature through metal porous materials or chemical cooling agents, and realizes gas dispersion through porous channels. The above measures effectively avoid high-temperature and high-speed gas from impacting the folded balloon body at close range, and ensure that the balloon body does not impact. Damaged by high-temperature gas; the gas generating device realizes the supply of two kinds of gas at initial low temperature and subsequent high temperature by introducing a cooling chamber. Compared with the scheme using two gas supply devices, it has the characteristics of simple structure, few parts and low cost ; In addition, the cooling chamber and the nozzle base are designed to be integrally processed and formed, which can effectively shorten the length of the gas generating device and facilitate the application under the condition of length limitation.

Description of drawings

FIG. 1 is a schematic structural diagram of Embodiment 1 of the present invention.

FIG. 2 is a partial view of the cooling chamber of FIG. 1 .

FIG. 3 is a schematic structural diagram of Embodiment 2 of the present invention.

FIG. 4 is a partial view of the cooling chamber of FIG. 3 .

In the picture: 1. Combustion chamber shell, 2. Solid grain, 3. Nozzle seat, 4. Igniter, 5. Gas nozzle, 6. Cooling chamber, 7. Back baffle, 8. Metal porous material, 9. Block Ring, 10. Front baffle, 11. Chemical cooling agent, 12. Positioning boss.

Detailed ways

The present invention will be described with reference to the accompanying drawings and specific embodiments:

As shown in Figures 1 and 2, a solid gas generating device for infrared bait, the gas generating device has a combustion chamber casing 1 with one end open, and a solid grain 2 is installed in the combustion chamber casing 1; The tail of the combustion chamber shell 1 is provided with a nozzle holder 3 that closes it; the nozzle holder 3 is provided with an igniter 4 and a gas nozzle 5; the tail of the nozzle holder 3 is a cooling chamber 6; the The cooling chamber 6 is provided with an open-celled metal porous material 8; the metal porous material 8 has a cylindrical shape; the metal porous material 8 is made of high temperature resistant metal, such as foamed iron nickel, stainless steel sintered wire mesh , stainless steel powder sintered porous material; the metal porous material 8 is installed with a rear baffle 7, and the metal porous material 8 is fixed in the cooling chamber 6 through the rear baffle 7 and the retaining ring 9; the rear baffle 7 opens There are a plurality of circular through holes; the rear baffle 7 and the cooling chamber 6 are connected by flanges and sealed by a sealing ring.

The working process of the present invention is as follows: Before use, the inflatable balloon infrared bait is folded and stored in the target to be protected. When needed, the inflatable balloon is thrown out, the igniter 4 of the gas generating device ignites, and the solid grain 2 is ignited to generate high-temperature gas; ; The metal porous material 8 absorbs the heat of the high-temperature gas and reduces the temperature of the discharged high-temperature gas; after that, the cooled gas enters the folded inflatable balloon through the porous channel of the rear baffle 7, so that the volume of the inflatable balloon expands.

After the inflation of the inflatable balloon, with the continuous increase of the temperature of the metal porous material 8, the absorbed heat gradually decreases; the gas gradually recovers the high temperature, enters the balloon and quickly reaches the required temperature on the surface of the balloon, simulating the infrared characteristics of the protected target.

As shown in FIG. 3 and FIG. 4 , the tail of the nozzle holder 3 is a cooling chamber 6 ; a cylindrical chemical cooling agent 11 is installed in the cooling chamber 6 ; the chemical cooling agent 11 is polymethyl Methyl acrylate; the chemical cooling agent 11 is provided with a plurality of circular through holes inside; the chemical cooling agent 11 will be pyrolyzed in contact with the high-temperature gas discharged from the gas nozzle 5, and absorb the heat of the high-temperature gas; the The time for the complete pyrolysis of the chemical cooling agent 11 is less than the time for gas discharge from the gas nozzle 5 .

The chemical cooling agent 11 is provided with a front baffle 10 and a rear baffle 7 at the front and rear, and the front baffle 10 and the rear baffle 7 are provided for fixing the chemical cooling agent 11; the front baffle 10 and the rear baffle The plate 7 is provided with a plurality of circular through holes, and the diameter and position of the circular through holes are the same as those of the chemical cooling agent 11 .

The rear baffle 7 and the cooling chamber 6 are connected by flanges and sealed by a sealing ring; the front baffle 10 and the cooling chamber 6 are fixed together by welding.

The middle part of the front baffle 10 is provided with a positioning boss 12, and the middle part of the chemical cooling agent 11 is provided with a cavity that cooperates with the positioning boss 12, and the positioning boss 12 is provided for the positioning of the chemical cooling agent 11 during installation. , so as to ensure that the circular through hole inside the chemical cooling agent 11 can be aligned with the through hole of the front baffle 10 .

The working process of the present invention is as follows: Before use, the inflatable balloon infrared bait is folded and stored in the target to be protected. When needed, the inflatable balloon is thrown out, the igniter 4 of the gas generating device ignites, and the solid grain 2 is ignited to generate high-temperature gas; Through holes; the chemical cooling agent 11 contacts the high-temperature gas to generate pyrolysis, absorbs the heat of the high-temperature gas, and reduces the temperature of the high-temperature gas; after that, the cooled gas enters the folded inflatable balloon through the porous channel to expand the volume of the inflatable balloon.

After the inflatable balloon is inflated, the chemical cooling agent 11 is pyrolyzed; the temperature of the high-temperature gas is no longer reduced, and enters the inflatable balloon through the circular through hole of the rear baffle 7, so that the balloon surface quickly reaches the required temperature, simulating the infrared characteristics of the protected target .

Claims (7)

1. A solid fuel gas generating device for infrared bait is provided with a combustion chamber shell with an opening at one end, wherein a solid explosive column is arranged in the combustion chamber shell; the tail part of the combustion chamber shell is provided with a spray pipe seat for sealing the combustion chamber shell; the nozzle base is provided with an igniter and a gas nozzle; the method is characterized in that: the tail part of the nozzle seat is provided with a cooling chamber; the cooling chamber is communicated with an internal cavity of the combustion chamber shell through a gas nozzle on the nozzle base so as to enable high-temperature gas in the combustion chamber shell to enter the cooling chamber; a cooling bag matched with the inner cavity of the cooling chamber is arranged in the cooling chamber; the cooling bag gradually absorbs the heat of the high-temperature fuel gas and reduces the temperature of the discharged high-temperature fuel gas; the front end of the cooling chamber is communicated with the inner cavity of the combustion chamber shell, and the rear end of the cooling chamber is provided with a rear baffle plate used for enclosing the cooling envelope in the cooling chamber; the rear baffle plate is provided with a plurality of circular through holes, and the circular through holes fill the cooled fuel gas into the infrared bait of the inflatable balloon positioned in the target to be protected so as to expand the volume of the inflatable balloon; along with the end of the work of the cooling bag, the gas gradually recovers high temperature, enters the inflatable balloon and enables the surface of the inflatable balloon to quickly reach the required temperature.

2. The solid gas generator for infrared decoy of claim 1, wherein: the cooling bag is made of open-cell porous metal material; the shape of the porous metal material is cylindrical; the porous metal material is made of high-temperature-resistant metal, and the high-temperature-resistant metal is one of foamed iron nickel, a stainless steel sintered wire mesh and a stainless steel powder sintered porous material.

3. The solid gas generator for infrared decoy of claim 1, wherein: the cooling bag is a cylindrical chemical cooling agent positioned in the cooling chamber; a plurality of circular through holes are formed in the chemical cooling agent; the chemical cooling agent is contacted with high-temperature fuel gas discharged from the fuel gas nozzle to be pyrolyzed and absorb the heat of the high-temperature fuel gas; and the time for finishing the complete pyrolysis of the chemical cooling agent is less than the gas discharge time of the gas nozzle.

4. The solid gas generator for infrared decoy of claim 3, wherein: the front part of the chemical cooling agent is provided with a front baffle; the front baffle is provided with a plurality of circular through holes, and the diameter and the position of the circular through holes are the same as those of the chemical cooling agent.

5. The solid gas generator for infrared decoy of claim 4, wherein: the middle part of the front baffle is provided with a positioning boss, and the middle part of the chemical cooling agent is provided with a concave cavity matched with the positioning boss.

6. The solid gas generator for infrared decoy of claim 3, wherein: the chemical temperature reducing agent is polymethyl methacrylate.

7. The solid gas generator for infrared decoy of claim 1, wherein: the rear baffle is connected with the cooling chamber through a flange and sealed through a sealing ring.

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