RU1729U1 - IGNITION DEVICE FOR GAS GENERATOR - Google Patents

Abstract

1. IGNITION DEVICE FOR A GAS GENERATOR, containing an ignition composition placed in a strong perforated body and an initiating element, characterized in that an ignition or glow plug for vehicles is installed as an initiating element. 2. The device according to claim 1, characterized in that the housing is made of two insulated sections, the gas-dynamic connection between which is ensured by a check valve, with the candle installed in the first section, and perforation made in the second section of the device.

Description

FOR THE GAS GENERATOR (utility model)

The proposed utility model relates to designs

ammunition devices designed to ignite charges from solid chemical fuels in gas generators used to produce gases and used in fire fighting, to fill elastic shells, deploy inflatable rescue equipment, actuate various mechanisms and other purposes.

Currently, there are many designs of igniter devices used in various gas generators, powder pressure accumulators, and solid propellant rocket engines (see Power Plants at the RGT, Igniters and Ignition Devices, Catalog. M.NPO Unform TEI 1991, V.V. Kadiya, Yu.N. Kovalev, A.M. Lipane Nonstationary to the process and design methods of nodes RDGT, M., Mechanical Engineering, J986r., G: p. 16-20; M.Kh. Fakhrutdinov Solid rocket rocket engines, M., Mechanical Engineering, 1981, pp. 138-142). Most

igniter devices is a durable perforated casing, with flame-retardant tons placed in it; a remnant, which can be previously placed in an easily deformable shell, and an initiating device. A pyro cartridge or an electric igniter are often used as the latter. It should be noted that there is no significant structural difference between the igniter and the electric igniter and they contain an electric coil, an initiating substance, an igniter composition, pressed into a rigid case. The latter has docking nodes

1 SHOW DEVICE

with the housing of the igniter device and with the elements of the electric circuit of the gas generator or external device.

Having a sufficiently high reliability and speed (0.001), they have limited operational capability due to the single occurrence of their action, i.e. not reusable. In addition to goods, despite their wide industrial production, they now have a high market value of ISOuuu rubles. for one electric igniter, as a result of which the igniter device and the gas generator as a whole rise in price.

However, when using gas generators in the above application, high performance requirements are not imposed. Therefore, the use of expensive electric igniters, and even a one-time action, is not economically justified. In these systems, it makes sense to use cheaper designs of ignition devices. The following can be attributed to devices in which various types of incandescent filaments, incandescent spirals, and systems with the formation of an electric train are used as an initiator (em.pat.USA 3II8375 MKI G06, 1964 pat .. Great Britain w IY220I ЖИ F02K, 1964. ) According to the technical solution

the above designs do not fundamentally differ from electro

igniters (squibs), but practically have the same not ---- prosperity. . - -

The closest technical solution for the combination of essential features is a patent (Ж 3850IOI ШИ Р42в, 1974. According to this solution, it is proposed to design an electric igniter it for small arms cartridges. A cylindrical case of an electric igniter (Fig. 1) with a truncated cone bottom is inserted through a barrel into the sleeve and tightly fits into the socket in the base, in the center of which an insulated electrical contact (+) passes through a small hole.

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it then passes through the body of the electric igniter 2 and ends with a ball 3, surrounded by a hinge of the igniter 4 and located in contact with the main charge 5. The second electrical contact C-) is fed through the sleeve to the body of the electric igniter. When voltage is applied between the ball and the casing of the electrosplice, the igniter and the main charges discharge and ignite. This provides obturation of the Central hole of the electric igniter ball at the end of the contact.

The disadvantage of the prototype, as well as analogues, is the limited usability due to the single use. In addition, such devices are currently not mass-produced, and the creation of their production will require significant costs, significantly exceeding the cost of electric igniters and squibs.

The objective of this technical solution is to develop the design of the igniter device of the gas generator with improved operational capabilities due to the multiple use of the initiating device in it and reduce its cost.

The solution to this problem is achieved due to the fact that in the igniter device of the gas generator, an spark plug or glow plug of a motor vehicle is installed as an initiator. Such candles are mass-produced and comply with GOST 2043-74, GOST 10132-62. These candles are now significantly

(candle price - 2000 rubles) is cheaper than electric igniters and pyro cartridge and can be repeatedly used to initiate the composition in the igniter device of the gas generator. Thus, the proposed ammunition device contains

-S-No. 0} S (

(FIG. 2,3) a perforated housing I with an ignition composition 2 placed therein and a spark plug 3 installed therein (FIG. 2) or an glow plug 4 (fG.Z).

The spark plug is a complete design (FIG. 2), which contains a central b and side 5 electrodes, a conductive glass sealant 7, a metal housing 8, a contact rod 9 and an insulator 10 (see V.G. Gerasimov et al. Electrical Manual, vol. 3, book 2, K., Energoizdat., 1982., P. 479),

The glow plug (on the example of a glow plug for a car heating system, a mobile ZAZ-968, index KAT3KCF6) is an integral structure (Fig. 3), which instead of electrodes contains an incandescent spiral II,

The glow plug is activated directly from a DC electric power source with a voltage of 6-I2B. The operation of the spark plug is provided using in addition to the energy source of the apparatus of the ignition system: ignition coil, interrupter, storage capacitor and switch,

In accordance with GOST 2043-74 and GOST 10132-62, the design of the candles ensures their performance at pressures in the combustion chamber up to 2.0 MPa. This is due to the strength characteristics of the candles. In this regard, it is possible to directly use candles in igniter devices of gas generators, the working pressure in the combustion chamber of which does not exceed 2.0 Sha.

Therefore, for the use of such candles in the igniter device of the gas generator, the working pressure of which exceeds 2.0 bar, the housing of the igniter device (Fig. 4) is made of two sections 12 and 13 with a check valve 14 located between them, and the candle is installed in the first section 12, and gas-dynamic connection with the combustion chamber 15 is carried out due to perforation in the second section 13, Ignition composition 2 is also placed in two sections, but the mass of the composition in the first section is read out from the conditions for the implementation of the level of pressure I'm in it, not exceeding 2 OMPa. It should be noted that in the general case, depending on the specific design of the gas generator, its functional purpose, the make and type of composition in the first may differ from the composition in the second section. For example: in the first section smoke or hunting powder, and in the second ballistic powder, which ensures reliability actuation of a fire-ignition device with the simultaneous exclusion of pressure peaks in the combustion chamber of the gas generator at the site of its exit to the stationary mode of operation.

The essence of the proposed device is illustrated in: Fig.2.3 - where are the igniter devices of the gas generator with a working pressure of up to 2.0 bar (low pressure gas generators);

Figure 4 - which shows the igniter device of a gas generator with a working pressure, a suite of 2.0 ZiL (high pressure gas generators);

Figure 5 - which shows the electrical circuit for igniting a device with a spark plug.

The following designations are adopted in the figures: I. Housing of a combustion device;

2 Ignition composition;

3. The spark plug;

4. Glow plug;

5 Central electrode of a spark plug; . t &.

7. Conducting sealant of a spark plug;

8. The metal body of the spark plug;

9. Contact rod of the spark plug; 10.Insulator spark plug;

II. Spiral glow plugs;

12 The first section of the housing of the igniter device of the high pressure gas generator;

13. The second section of the housing of the igniter device of the high pressure gas generator;

14. The check valve in the igniter device of the high pressure gas generator;

15. The combustion chamber of the gas generator;

16. The charge of the gas generator.

The igniter device operates as follows. In the low pressure gas generator (Fig. 2,3), when an electric pulse is applied to the spark plug, either a spark discharge occurs between electrodes 5 and b (for spark plug 3; or for incandescent coil II (for glow plug 4). Due to direct placement of the plug 3.4 in the igniter composition 2, the latter is ignited and the combustion products expire through the perforation of the ignition device body into the combustion chamber 15 of the gas generator to charge 16, which ensures its ignition.

In the high pressure gas generator (Fig. 4), when an electrical impulse is applied to the candle 3 (4), a spark discharge occurs between the electrodes 5 and b (or the incandescent coil II), which provides ignition of the igniter composition 2 in the first section 12 of the housing of the igniter device. Combustion products of the composition through

the check valve 14 enters the second section 13 and ignite the composition placed there. When the pressure in the section 13 of the level of 2.0 MPa is reached, the valve 14 is closed and thereby gas-dynamic isolation of the section 12 from the section 13 and the combustion chamber 15 of the gas generator is depleted. At the same time, the products of combustion of the igniter composition 2 located in the second section 13 of the device through the perforation in the housing enter the combustion chamber 15 of the gas generator to charge 16 and ignite it.

It should be noted that if the ignition of the flame-retardant composition from the glow plug is not difficult, then the electrical activation circuit is experimentally found for the spark plug (Fig. B, which ensures reliable ignition of the composition.

A feature of the presented electrical circuit is the use, along with the B114B TU37.003.678-80 ignition coil, of the emergency PC33I GOST3940-84 vibrator or 513734-01 vibrator, which are widely used on ZIL-131, Ural 375DM vehicles (see A.V. Akimov and others. Electric equipment of automobiles. Reference book / E45. M., Transport, 1993, pp. 62-65). The use of emergency vibrators allows providing continuous spark discharge on spark electrodes up to 1C seconds. In this case, the energy source can be of any type, since the level of modern electrical engineering allows, by introducing certain devices into the circuit, to bring the voltage and current values to the required value.

The proposed design of the igniter device differs from the prototype in a different design of the initiating device. Considering that spark plugs and inflation plugs are already used in industry (motor vehicles, boat engines, etc.), however, such a combination is not known in the technique, that is, the proposal is novel.

The design is more than easy to implement, since the candles used and the necessary ignition devices are tested and produced by the industry. Their use provides a significant reduction in the cost of a combustible device and the generator as a whole, the need for which is increasingly growing in technology. it

due to both the current cost of candles compared to electric igniters, and the possibility of multiple

use. Thus, the proposed model has a second sign of a utility model - industrial applicability.

It should be noted that the use of ignition cuts and incandescent s of initiator quality and an ignition device is advisable not only for generators, but also for other solid fuel systems (powder pressure accumulators, rocket engines, etc.), where there are no strict requirements for system performance ( to the parameters of the system exit to the stationary mode of operation).

The design has been tested, has shown positive results, is currently being implemented on a gas generator designed for the coal industry.

iC-jty fJ / tfx J

-, V. Ya. Borochkin

irl - .and. Demchenko

 E.D. Lebedev

fylfa / s-g-Nagaytsev

 Z.V. Lolyashchuk

/ - ", -V.V. Rozanov

3 / s N.N. Sysoev

 M.M. Trofimov

 Z.A. Shandakov

 A.K. Shumey cue

Claims (2)

1. IGNITION DEVICE FOR A GAS GENERATOR, containing an ignition composition, placed in a strong perforated housing and an initiating element, characterized in that an ignition or glow plug of a motor vehicle is installed as an initiating element.  2. The device according to p. 1, characterized in that the casing is made of two insulated sections, the gas-dynamic connection between which is provided by a check valve, with the candle installed in the first section, and perforation made in the second section of the device.