JPH0619963Y2 - Combustor assembly structure - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a structure for assembling a combustor, and more specifically, it is composed of a combustion cylinder and an outer cylinder, and a plurality of substantially cylindrical combustion cylinders are arranged in series in the axial direction. The present invention relates to an assembling structure of a combustor which is arranged and assembled together with an outer cylinder.

[Prior art]

As a conventional combustor assembly structure, the upstream end of one combustion cylinder, that is, the end on the fuel supply side is elastically supported on the top of the outer cylinder. Sho 57
-127723)), or Japanese Patent Application No. 57-21316 (refer to Japanese Patent Application Laid-Open No. 58-138927) in which workability is improved by a so-called bayonet type of insertion type. There is something inside.

Further, an application in which a two-stage combustion cylinder divided in the axial direction is supported by a bayonet system is applied in Japanese Patent Application No. 58-100265 (see Japanese Patent Laid-Open No. 59-225223).

However, in the conventional assembling structure of this kind of combustor, only the combustion cylinder on the upstream side is configured to be elastically supported by the outer cylinder, and thermal expansion occurs when fixing the combustion cylinder arranged on the downstream side. The relative position is not stable because the play is provided so as to absorb the difference between the two, and the deviation causes the deviation of the amount of air flowing in from the gap between them, which may result in non-uniform air distribution. was there.

[Purpose of device]

The object of the present invention is to pay attention to such a problem and solve the problem. Therefore, even in a combustor in which a combustion cylinder is made of ceramic, a harmful constraint is not generated between its assembly members. The first combustion cylinder and the second combustion cylinder are fitted together, and the engaging portion of the second combustion cylinder is biased toward the support member fixed to the outer cylinder member by the elastic body, thereby integrally forming. An object of the present invention is to provide an assembling structure of a combustor which is configured and easy to carry, assemble and disassemble.

〔Constitution〕

In order to achieve such an object, the present invention provides first and second combustion cylinders that can be separated and fitted together along the flow of combustion gas, and the first combustion cylinder on the upstream side of the flow of combustion gas. And an outer cylinder member that accommodates the first and second combustion cylinders in an integrally fitted state and forms an air passage around the first and second combustion cylinders, and projects outward from the peripheral portion of the second combustion cylinder. A plurality of engaging portions provided, a fixing portion arranged along the air passage around the outer periphery of the combustion cylinder, and fixed to the outer cylinder member at one end via a fixing means, and the engaging portion to the other end. Between a support member having a plurality of locking claws protruding from the locking member and a space formed between the locking claws, and the top of the outer cylinder member and the first combustion cylinder. And an elastic body that displaces the first combustion cylinder together with the second combustion cylinder toward the support member. And Bei, the outer cylinder member is characterized in that so as to fixedly supported by the main body casing.

[Action]

According to the present invention, with the first combustion cylinder and the second combustion cylinder fitted to each other, the second combustion cylinder corresponds to the plurality of locking claw portions of the support member fixed to the outer cylinder member. Since the plurality of engaging portions can be biased by the elastic force of the elastic body and the first and second combustion cylinders can be elastically supported by the support member, harmful stress is generated in each member due to the difference in thermal expansion. , The first combustion cylinder and the second combustion cylinder do not have a gap or a gap between them, and a highly reliable fitting state can be maintained between the combustion cylinders, and disassembly and assembly are easy. Therefore, the outer cylinder member and the first and second combustion cylinders can be easily attached to and detached from the main body casing.

〔Example〕

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

1 to 3 show an example of a two-stage combustor as one embodiment of the present invention. Here, 1 is the first stage primary combustion cylinder and 2 is the last stage secondary combustion cylinder. A swirler 3 and an injection nozzle 4 for generating a swirling flow are attached to a top portion of an upstream side of the primary combustion cylinder 1 together with a spring 5 elastically supporting them. Reference numeral 6 is a cap member that constitutes an outer cylinder, 7 is a heat insulating member attached to the inner surface of the cap member 6, and a flange 6A of the cap member 6 has a retainer 8 as shown in FIG.
Is fixed with a fixing screw 9, and a flange portion 11 of the combustion tube support member 10 is provided between the retainer 8 and the heat insulating member 7.
Is pinched.

Here, reference numeral 20 denotes a main body casing to which the combustor integrally assembled in this way is attached via the retainer 8.

Furthermore, as shown in FIGS. 2 and 3, locking claw portions 12 are formed at the downstream end of the combustion cylinder support member 10 so as to project inward from four directions. In this example, 12 is provided with a locking groove 12A having an arc shape. 13 is the claw 1
It is a space provided between the two, and air can be supplied to the air passage 14 around the combustion cylinder through this space 13, and the engaging portion of the secondary combustion cylinder, which will be described later, is assembled at the time of assembly. It can be inserted from 13 to the side of the primary combustion cylinder 1.

Reference numeral 15 is an air guide cylinder provided in the secondary combustion cylinder 2. In this example, the four air guide cylinders 15 are provided with the claw portions of the support member 10 described above.
The engaging portion 16 is formed by being provided corresponding to the locking groove 12A in 12 so that the outward opening of the guide cylinder 15 is projected outward from the combustion cylinder 2. A semicircular locking recess 1A that can be engaged with the engaging portion 16 is formed at the downstream end of one of the primary combustion tubes 1, as shown in FIG.

In assembling the combustor having such an assembling structure, first, the side of the secondary combustion cylinder 2 where the air guide cylinder 15 is provided, the engaging portion 16 of the outer cylinder side supporting member 10 is arranged. Claw 12
Insert the space 13 so that it does not come into contact with, and rotate it further so that the cylindrical engaging portion 16 of the secondary combustion cylinder 2 engages with the locking groove 12 of the claw portion 12.
On the other hand, the engaging recess 16A of the primary combustion cylinder 1 is brought into contact with the engaging portion 16 so that the engaging portion 16 of the secondary combustion cylinder 2 is located on the outer cylinder side. It is configured to be sandwiched between the locking groove 12A of the support member 10 and the locking recess 1A at the end of the primary combustion cylinder 1.

Thus, the primary combustion cylinder 1 together with the swirler 3 and the fuel injection nozzle 4 is engaged with the engaging portion 16 of the secondary combustion cylinder 2 by the spring force of the spring 5.
The secondary combustion cylinder 2 can be elastically supported together with the above-mentioned members through the support member 10 by biasing the combustion cylinders toward each other. Strain and stress caused by the difference are suppressed,
The gap in the fitting portion between the combustion tubes does not change or deflect.

4 to 6 show another embodiment of the present invention.

Here, 26 is an engaging portion projecting from the outer peripheral portion of the secondary combustion cylinder 2, and in this example, the three engaging portions 26 are arranged at equal circumferential positions regardless of the air guide cylinder 15. On the other hand, on the other hand, the combustion cylinder support member 10 is provided with the claw portion 12 and the locking groove 12A at a position corresponding to the engagement portion 26. In the case of this example, the engaging portion 26
Is formed in a substantially square shape, but the shape may be such that it can be easily engaged, and the corresponding groove 12A is also formed in accordance with the shape of the engaging portion 26. When 1 and 2 are made of ceramic, such an engaging portion 26 may be attached by reactive sintering after forming the cylindrical portion.

Further, in this example, the primary combustion cylinder 1 and the secondary combustion cylinder 2 are held in a fitted state as shown in the figure. The assembly structure is almost the same as that described in the first embodiment, and the description thereof is omitted.

[Effect of device]

According to the present invention, the first and second combustion cylinders that can be separated and fitted together along the flow of the combustion gas, and the first combustion cylinder are arranged upstream of the flow of the combustion gas, and An outer cylinder member that accommodates the first and second combustion cylinders in an integrally fitted state and forms an air passage around the first and second combustion cylinders, and a plurality of engagements that project outward from the peripheral portion of the second combustion cylinder. Part, a fixing part disposed along the air passage around the outer periphery of the combustion cylinder, and fixed to the outer cylinder member at one end via a fixing means, and the other end engageable with the engaging part. A support member having a plurality of locking claws protruding from each other and a space formed between the locking claws, and a support member disposed between the top of the outer cylinder member and the first combustion cylinder. An elastic body that biases the first combustion cylinder together with the second combustion cylinder toward the support member, and the outer cylinder member Since it is fixedly supported on the body casing, obstacles caused by the difference in thermal stress between the combustion cylinders and between the outer cylinder member and the support member that integrally support them are prevented, and loosening due to vibration etc. Not only is maintained in a stable state, but also the first combustion cylinder and the second combustion cylinder are integrally fitted and fixed to the outer cylinder member by the elastic body. It is possible to keep each cylinder in a stable posture by biasing it toward the support member and elastically supporting it. In addition, the space provided in the support member can be used for easy assembly, and the effect of smoothly guiding the air to the air passage around the combustion tube through the space can be obtained. With the tubular member and the first and second combustion tubes integrated, they can be easily removed from the main body casing or attached to the main body casing for inspection and equipment.

[Brief description of drawings]

 FIG. 1 is a sectional view showing an example of an assembling structure of a combustor of the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, FIG. 3 is a perspective view of a main portion thereof, and FIG. FIG. 5 is a sectional view showing another embodiment of the present invention, FIG. 5 is a sectional view taken along the line BB in FIG. 4, and FIG. 6 is a perspective view of the main part thereof. 1 ... Primary combustion cylinder, 1A ... Locking recess, 2 ... Secondary combustion cylinder, 3 ... Swirler, 4 ... Injection nozzle, 5 ... Spring, 6 ... Cap member, 6A ... Flange portion , 7 ... Insulation material, 8 ... Retainer, 9 ... Screw, 10 ... Combustion tube support member, 11 ... Collar part, 12 ... Claw part, 12A ... Locking groove, 13 ... Space, 14 ...... Air passage, 15 ...... Air guide tube, 16, 26 ...... Engagement part. 20 ... Main body casing

Claims (1)

[Scope of utility model registration request] 1. A first and a second combustion cylinder that can be separated and fitted together along the flow of the combustion gas, and the first combustion cylinder is disposed on the upstream side of the flow of the combustion gas, and An outer cylinder member that houses the first and second combustion cylinders in an integrally fitted state and forms an air passage around the first and second combustion cylinders, and a plurality of engaging portions that project outward from the peripheral portion of the second combustion cylinder. A fixing portion arranged along the air passage around the outer periphery of the combustion cylinder and fixed at one end to the outer cylinder member via fixing means, and at the other end so as to engage with the engaging portion. A support member having a plurality of locking claws provided and a space formed between the locking claws; and a support member disposed between the top of the outer cylinder member and the first combustion cylinder. An elastic body that biases one combustion cylinder together with the second combustion cylinder toward the support member; Assembly structure of the combustor being characterized in that so as to fixedly supported on the body casing.