JPH07217889A - Combustion device - Google Patents

Abstract

PURPOSE:To eliminate an end of a spring clip from being dropped and further to prevent a crack from being generated at a welded part. CONSTITUTION:An end part of a cylinder part 5 for generating combustion gas and a tail cylinder 6 for feeding combustion gas to a downstream side is inserted into the other end, an extremity end of thin plate is divided into a plurality of sections in a clearance between both devices, a spring clip having a resilient characteristic in a radial direction is placed, thereby both devices are connected. The end of the spring clip 7 at a combustion device is covered at its outer circumference of the extremity end with a plurality of band plates 9 and a plurality of spring clips 7 are connected through the band plates, respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustor applied to gas turbines, jet engines and the like.

[0002]

2. Description of the Related Art FIG. 2 is an explanatory view of a conventional gas turbine. In the figure, generally, in a gas turbine, air is compressed by a compressor 1, fuel is injected by a combustor 2 to create combustion gas, the combustion gas is introduced into a turbine 3, the turbine 3 is rotated, and power is generated by the turbine 3. The machine 4 and the like are driven and rotated. The combustor 2 is mainly composed of an inner cylinder part 5 that burns fuel to generate combustion gas and a tail cylinder part 6 that guides the combustion gas to the turbine 3 for connecting both devices while allowing thermal deformation. The tip of the inner tubular portion 5 is inserted into the tail tubular portion 6 and the spring clip 7 made of a thin plate is disposed in the circumferential gap between the two devices, and the radial repulsive force of the spring of the spring clip 7 is applied. Both devices are combined. This spring clip 7 is the inner cylinder part 5
Spot welding is performed by dividing the tip into multiple parts on the outer peripheral side of the tip.
It is fixed at.

[0003]

As described above, in the conventional combustor 2 such as a gas turbine, the spring clip 7 is made of a thin plate, and the tip is divided into a large number of spots to be spot-welded to the outer periphery of the inner cylindrical portion 5. It is fixed by 8 and has a structure that prevents compressed air from flowing through the gap between the two devices to enter the tail tube portion 6 and couples the two devices while permitting thermal deformation of the two devices. The spring clip 7 is worn, damaged, and falls off due to minute vibrations generated by combustion or the like, and a partial contact due to thermal deformation causes an excessive force to act on the specific spring clip 7 to cause a crack c to be damaged in the welded portion. There is a fear of such.

[0004]

A combustor according to the present invention is intended to solve the above-mentioned problems, and is provided with one of a tubular portion for generating combustion gas and a tail tubular portion for delivering the combustion gas downstream. A combustor in which the two devices are connected to each other through a spring clip which is made of a thin plate and whose tip is divided into a plurality of parts in the circumferential direction into the gap between the two devices by inserting the ends into the inside of the other device. In the above, the outer periphery of the tip end of the spring clip is covered with a plurality of strip plates arranged in the circumferential direction, and the tip ends of the spring clip are connected to each other through the strip plate.

[0005]

That is, in the combustor according to the present invention, one end of either the tubular portion for generating the combustion gas or the tail tubular portion for sending the combustion gas to the downstream is inserted into the inside of the other, and between the two devices. A plurality of spring clips in the combustor, which are made of a thin plate in the gap and whose tip is divided into a plurality of pieces in the circumferential direction and which are connected via a spring clip having elasticity in the radial direction, are arranged in the circumferential direction. The tip of the spring clip is connected to each other through the cover plate with one strip, and the outer circumference of the spring clip is connected to each other with the strip to reinforce it. Even if part of the strip is worn or thinned, the strip is connected to the spring clip at the other part. Further, even if the spring clip is partially contacted by thermal deformation, an excessive force does not act only on the tip of a specific spring clip, and the load is distributed to the tips of the plurality of spring clips. Since the spring clip is not constrained by the strip plate in the entire circumferential direction, generation of large thermal stress due to the difference in thermal expansion can be prevented.

[0006]

1 is an explanatory view of a combustor according to an embodiment of the present invention. In the figure, the combustor according to the present embodiment can be used not only as a combustor for a gas turbine but also as a combustor for a jet engine. Generally, a gas turbine compresses air with a compressor and Is generated to generate combustion gas, the combustion gas is introduced into the turbine, the turbine is rotated, and the turbine is driven to rotate a generator or the like. As shown in the figure, this combustor mainly consists of an inner cylinder part 5 that burns fuel to generate combustion gas and a tail cylinder part 6 that guides the combustion gas to the turbine. For connection, insert the tip of the inner cylinder part 5 into the tail cylinder part 6 and arrange the spring clip 7 made of a thin plate in the circumferential gap between the two devices, and the spring repulsive force of the spring of the spring clip 7 Both devices are connected via. The spring clip 7 is divided into a large number of tips on the outer circumferential tip side of the inner tubular portion 5 and is fixed by spot welding 8. Further, in the present combustor, the spring clip 7 is locally contacted to cause wear and thinning, and the spot welding 8 at the base of the spring clip 7 is performed.
The outer circumference of the spring clip 7 is covered with one strip plate 9 every 4 to 5 pieces so as not to be cracked, and the tip outer circumferential side of the spring clip 7 is attached to the strip plate 9 by spot welding 10.

As described above, by connecting and covering the outer peripheral side of the tip of the spring clip 7 with one strip plate 9 every 4 to 5 sheets, a part of the strip plate 9 is worn by a minute vibration generated by combustion or the like. However, since the other part of the strip 9 is connected to the spring clip 7,
The tip of the will not be worn or damaged and will not fall out. Further, even if one-sided contact occurs due to thermal deformation, an excessive force does not act only on the specific spring clip 7, and the strip 9
Since the load is evenly distributed to the four to five spring clips 7 via the, the occurrence of cracks in the welded portion is prevented. Further, since the tip of the spring clip 7 is not constrained by the strip 9 in the entire circumferential direction, generation of a large thermal stress due to the difference in thermal expansion can be prevented.

In a conventional combustor such as a gas turbine, a spring clip is worn, damaged, and falls off due to minute vibrations generated by combustion or the like, or an excessive force is applied to a specific spring clip due to partial contact due to thermal deformation. There is a risk of cracks and damage to the welded part due to work, but in this combustor, the outer peripheral side of the tip of the spring clip 7 that is divided into a large number in the circumferential direction is connected by one strip plate 9 every 4-5 pieces. And the tip of the spring clip 7 is reinforced, and the outer peripheral side of the tip of the spring clip 7 is welded to one strip plate 9 for every 4 to 5 sheets. Even if it occurs, the tip of the spring clip 7 will not fall off. Such external force is without work, the crack can be prevented in the spring clip 7 base. Since the strip 9 is divided in the circumferential direction for each of the 4 to 5 spring clips 7, a large thermal deformation is absorbed and does not occur.

[0009]

EFFECTS OF THE INVENTION The combustor according to the present invention is configured as described above, and even if a small amount of vibration generated by combustion or the like causes a part of the strip plate to be worn or thinned, the strip plate is not covered with other parts. Since it is connected with the spring at the end, the tip of the spring clip will not fall off. In addition, even if the spring clip is unbalanced due to thermal deformation, an excessive force does not act only on the tip of a specific spring clip, and the load is distributed to the tips of a plurality of spring clips.
Generation of cracks in the welded part is prevented.

[Brief description of drawings]

FIG. 1 (a) is a cross-sectional view of a combustor according to an embodiment of the present invention, and FIG. 1 (b) is a BB arrow view in FIG. 1 (a).

2 (a) is a schematic view of a conventional gas turbine, FIG. 2 (b) is a cross-sectional view of the combustor, and FIG. 2 (c) is a view taken along the line C-C in FIG. 2 (b). is there.

[Explanation of symbols]

 5 Inner cylinder part 6 Tail cylinder part 7 Spring clip 8 Spot welding 9 Strip plate 10 Spot welding

Claims (1)

[Claims] 1. An end of either one of a tubular part for generating combustion gas and a tail tubular part for sending the combustion gas downstream is inserted into the inside of the other and is made of a thin plate into a gap between both devices, and a tip is surrounded. In a combustor in which the above devices are connected to each other through a spring clip that is divided into a plurality of parts and has elasticity in the radial direction, the outer periphery of the tip of the spring clip is covered by a plurality of strip plates arranged in the circumferential direction. A combustor in which a plurality of tips of the spring clip are connected via the strip plate.