RU174863U1 - STARTING TORCH IGNITOR COMBUSTION CHAMBERS - Google Patents

Abstract

The utility model relates to turbine engineering, in particular to gas turbine engines containing starting flare igniters. The technical result aimed at achieving the proposed design of the starting flare ignitor of the combustion chamber is to improve its fire parameters and increase manufacturability in the manufacture, testing and operation of the igniter. Technical result is achieved by the fact that in the starting flare igniter of the combustion chamber, the housing of which is connected to the exhaust cartridge side and contains open cavities communicated with the annular channel of the combustion chamber and the ignition chamber of the igniter, while an annular protrusion is made on the side surface of the exhaust pipe, and an ignition plug and a fuel nozzle are installed on the body of the ignitor, unlike the known exhaust pipe connected to the ignitor body threaded connection, while between the annular protrusion and the igniter body is a distance ring, and open cavities are additionally communicated with the cavity pal'nite igniter chamber using tangential holes formed in the ignitor housing.

Description

The utility model relates to turbine engineering, in particular to gas turbine engines containing starting flare ignitors.

Known starting flare ignitor of the combustion chamber (invention No. 2083858, IPC F02C 7/26, application 9393011293, publ. 02.03.1993), the exhaust pipe of which contains holes for air supply and is mounted on the housing of the combustion chamber separately from the ignitor. The disadvantages of this design are:

- the need to ensure alignment of the location of the nozzle with the housing of the igniter (requires accurate mounting holes and sockets for the flange of the exhaust pipe on the housing of the combustion chamber);

- the difficulty of ensuring the tightness of the joints of the flanges of the pipe, the housings of the COP and the igniter;

- the holes for supplying air to the igniter are made in the nozzle, which (due to the distance from the combustion zone of the igniter) reduces the penetration of air jets from the holes, which impairs ignition and combustion of the ignitor.

Also known igniter (invention No. 2245447, IPC F02C 7/26, publ. 01/27/2005), in which the nozzle is made integral with the igniter body inseparable (welding, soldering, rolling) connection. The disadvantages of this design is not the maintainability of the igniter for defects in the pipe in operation, as well as the impossibility of replacing it when fine-tuning the fire parameters.

The closest is the starting flare igniter of the combustion chamber (utility model No. 131419, IPC F02C 7/00, publ. 08.20.2013), the casing of which is connected to the exhaust pipe and contains open cavities communicated with the annular channel of the combustion chamber and the ignition chamber of the igniter, with an annular protrusion is made on the side surface of the exhaust pipe, and an ignition plug and a fuel nozzle are installed on the igniter body. The disadvantage of such an igniter is the difficulty of fine-tuning when firing parameters are not received (in the factory, only by replacing the parts of the assembly unit or by welding part of the air supply holes). In addition, in operation, it is possible to change the parameters of the igniter (for example, the flow rate characteristics of the starting nozzle or the parameters of the air in the combustion chamber), leading to a loss of operability of the igniter. Thus, this igniter is characterized by low maintainability due to the non-separable design and the inability to operate the adjustment of the combustion air flow to ensure fire parameters.

The technical result aimed at achieving the proposed design of the starting flare igniter of the combustion chamber is to improve its fire parameters and increase manufacturability in the manufacture, testing and operation of the igniter.

The technical result is achieved by the fact that in the starting flare igniter of the combustion chamber, the casing of which is connected to the exhaust pipe and contains open cavities communicated with the annular channel of the combustion chamber and the ignition chamber of the igniter, an annular protrusion is made on the side surface of the exhaust pipe, and on the igniter body a spark plug and a fuel nozzle are installed, unlike the known exhaust pipe, it is connected to the igniter body by means of a threaded connection, while a spacer ring is located at the annular protrusion and the igniter body, and the open cavities are additionally communicated with the cavity of the ignition chamber of the ignitor by means of tangential holes made in the ignitor body.

The claimed solution is illustrated by drawings, which depict: FIG. 1 is a general view of the igniter, FIG. 2 - view A, FIG. 3 - section BB.

The igniter (Fig. 1) is mounted on the housing of the combustion chamber 1 and includes a starting nozzle 2, a spark plug 3, while an exhaust pipe 5 with a thread and turnkey flats is mounted on the igniter body 4. The pipe 5 is mounted in the igniter housing until it stops with the contact of the seating surfaces. An annular protrusion is made on the side surface of the exhaust pipe 6. A distance ring 7 is located between the annular protrusion 6 of the pipe 5 and the housing 4. The locking of the pipe 5 is performed by pressing in the groove of the ring 7. The ring itself has a protrusion for fixing it on the housing, where the reciprocal groove is made. The nozzle of the exhaust pipe through a movable sleeve is connected to the cavity of the flame tube 8.

The igniter body 4 and the exhaust pipe 5 form a collapsible threaded connection, while the igniter body contains open cavities 9 for air to enter from the annular channel of the combustion chamber. From these cavities, air enters the main igniter zone, the ignition chamber 10, through the holes 11 and the groove 12. Using the distance ring 7, due to its height, the overlap of the holes 11 is adjusted. The height of the ring 7 is selected based on the results of fire tests ( for example, at the maximum permissible height of the ring, the holes may not overlap, and when mounted without a ring, the holes are blocked as much as possible). As a result, the screwing depth of the nozzle may vary to partially overlap the holes 11 in the housing 4 (for fine tuning the firing parameters). The shape and wall thickness of the housing provides the possibility of cutting internal threads, and openings 11 to perform tangential. The igniter body is supposed to be manufactured using additive technologies.

As a result, due to the presence of a threaded connection between the exhaust pipe and the igniter body, the area of the tangential openings for supplying air to the igniter can be regulated, which allows to improve the fire parameters of the igniter and to increase manufacturability in its manufacture, testing and operation.

Claims (1)

The starting flare igniter of the combustion chamber, the casing of which is connected to the exhaust pipe and contains open cavities communicated with the annular channel of the combustion chamber and the ignition chamber of the igniter, while an annular protrusion is made on the side surface of the exhaust pipe, and an ignition plug and a fuel nozzle are installed on the body of the ignitor, characterized in that the exhaust pipe is connected to the igniter body by means of a threaded connection, while between the annular protrusion and the igniter body a distance ring is located, and the open cavities are additionally communicated with the cavity of the ignition chamber of the igniter using tangential holes made in the body of the ignitor.

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