SU1211529A1 - Igniting device - Google Patents

Description

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The invention relates to energy and can be used in high-speed filament combustion chambers, mainly air-jet engines.

The aim of the invention is to improve the reliability of the ignition device

FIG. 1 shows a combustion chamber with an ignition device: above the longitudinal axis — before starting; below the longitudinal axis — in the working position, a longitudinal section; FIG. 2 is a section A-A in FIG.

The ignition device contains a stabilizer 15 which is made of a composite of bimetallic plates 2 in the form of a portion of a conical surface. The plate 2 is attached with the smaller side to the holder 3, rigidly connected: mu to the body 4 through the blades 5 swirls. Through the holder 3, a central electrode 6 is introduced into the internal volume of the stabilizer 1. Fuel is injected into the annular channel 7 by the nozzles 8. The fuel mixture is fed into the combustion chamber 9 through the annular gap 10J formed by the housing 4 and the free ends of the plates 2, Lugs 1 1, j The plates 2, which are made externally from the outside, abutted against the housing 4, provide the same width of the annular gap 10 "Triangular protrusions 12, which are made on the inside of the plates 2, are removed from the other by straightening in cold condition of the plates 2 and Coziness in the central part of the free end of the stabilizer 1 is a star-shaped hole 13. The plates 2 are made of sheet bimetallic material having two layers: active with a high coefficient of thermal expansion and passive with a low coefficient of expansion, while the passive layer is located on the inner side of the plates. As the material of the plates can be applied thermobimetals, made from iron-nickel alloys,

When the fuel is supplied to the air behind the stabilizer 1, an area is formed

15292

reverse current flow of air-fuel mixture. Before launching, plate 2 is straightened and darkening with stabilizer 1 is the largest, which ensures

5 reliable ignition of the mixture and flame retention. After starting into the zone of reverse currents, the products with high temperature are sucked in, therefore the processes of preparing combustible

To mix go more intensively. The need for more shading of the combustion chamber 9 by the stabilizer 1 is eliminated.

15 Plates 2 are heated as a result of their flushing by high-temperature gases and the radiation of a flame. When plate 2 is heated, bend 20 inside the stabilizer 1, the annular gap 10 increases, and transverse triangles e protrusion 12 converge as they cover the electrode 6 from the back currents of combustion products and radiation of high-temperature gases. The hydraulic resistance of the stabilizer 1 decreases, the flow-rate of the combustion chamber 9 increases. In the maximum operating mode, the plates 2 are bent so that the flow area of the gap 10 is the largest chosen from the condition of flame stabilization and maximum flow rate of the combustion chamber 9. Triangular projections: 12 are combined and form a continuous protective wall covering the electrode 6 from the effects of high-temperature gases.

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Thus, by changing

geometrical dimensions as a result of the thermal deformation of the stabilizer and the proposed measures to protect the candle candle, automatic control of the operating mode and increase in reliability of the ignition device;

P

13

 Editor A. Lezhnin

Compiled E, Languages

Tehred M. Gergel Corrector S. Cherni

628 / 4-3 Circulation 515 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab, d.4 / 5

Branch PGS Patent, Uzhgorod, st. Project, 4

Phage.2

Claims (3)

1. IGNITION DEVICE, comprising a fuel pipe and a holder with a central electrode and a hollow stabilizer around it, characterized in that, in order to increase reliability, the stabilizer is made of bimetallic plates in the form of a section of a conical surface facing the smaller side to the holder, however, the said plates are mounted with the possibility of radial movement during heating and cooling. 2. The device according to claim 1, characterized in that the transverse protrusions of a triangular shape are made on the free ends of the plates from the inside. ΐ 3. The device according to claim 1, characterized in that transverse rectangular protrusions are made on the free CJ ends of the plates from the outer side. c XG> about ZZZZZZZZ ^ ZZZZZA ^ / 777. ZZZZZZZ. zzzzz ^ zzzzhzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz. , W to — l ΦαζΑ fl