Combustor and method for manufacturing the same

Abstract

This assembly comprises a wall body in which is formed a through-hole passing through in a thickness direction, and a component fixed to one surface of the wall body so as to cover the through-hole, a welded part welded so as to fix the component to the one surface being accommodated within the through-hole.

Description

[Technical Field]

[0001] This disclosure , burn The present invention relates to a combustor and a method for manufacturing the combustor. This application claims priority based on Japanese Patent Application No. 2022-037718, filed with the Japan Patent Office on March 11, 2022, the contents of which are incorporated herein by reference. [Background technology]

[0002] For example, Patent Documents 1 to 3 describe combustors in which, for the purpose of reducing carbon monoxide, a throttle portion having an inclined surface that guides the flow of combustion gas radially inward is provided on the inner peripheral surface of a cylindrical body through which the combustion gas flows. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-180899 [Patent Document 2] International Publication No. 2021 / 201093 [Patent Document 3] Patent No. 6623485 Summary of the Invention [Problem to be solved by the invention]

[0004] Such a constricted portion is fixed to the inner circumferential surface of the cylindrical body by welding from the inside of the cylindrical body, but when the constricted portion is fixed at a position deeper than the open end of the cylindrical body, there is a problem that the welding workability is deteriorated. This problem is not limited to the manufacture of combustors, and a similar problem applies when any part is welded to the inner circumferential surface of any cylindrical member. Furthermore, even when any part is fixed to one surface of a plate-like member rather than a cylindrical member, if an obstacle is placed facing the one surface, the obstacle will get in the way and the same problem will apply.

[0005] In view of the above, at least one embodiment of the present disclosure provides a joint that improves the workability of welding parts to a wall body. Contains A combustor and a method for manufacturing the combustor are provided. [Means for solving the problem]

[0006] In order to achieve the above object, the present disclosure Combustor teeth, 1. A combustor comprising a combination, the combination comprising: The wall body has a through hole formed therethrough in the thickness direction, and a component fixed to one surface of the wall body so as to close the through hole. The welded portion where the component is fixed to the one surface is accommodated in the through hole. The wall body is a cylindrical body having a cylindrical shape, and the one surface is an inner peripheral surface of the cylindrical body, and the cylindrical body comprises an inner wall portion including the inner peripheral surface of the cylindrical body and an outer wall portion including the outer peripheral surface of the cylindrical body, and the inner wall portion and the outer wall portion are provided at an interval in the thickness direction of the cylindrical body so as to form a flow path therebetween, and the through hole comprises a first hole portion formed so as to penetrate the inner wall portion in the thickness direction thereof, a second hole portion formed so as to penetrate the outer wall portion in the thickness direction thereof, and an intermediate hole portion between the first hole portion and the second hole portion which forms a part of the flow path, and the weld portion is accommodated in the first hole portion, and a lid portion is fixed to the outer peripheral surface of the cylindrical body so as to close the through hole. are.

[0007] In addition, the present disclosure Combustor The method for producing 1. A method of manufacturing a combustor, including a method of manufacturing a combination of a component secured to a wall, the method of manufacturing the combination comprising: The method includes the steps of forming a through hole penetrating the wall body in the thickness direction thereof, and welding an inner peripheral surface of the through hole to the part from the other surface side of the wall body so that the part closes the through hole from one surface of the wall body, and the welded part where the inner peripheral surface of the through hole and the part are welded is accommodated in the through hole. the wall body is a cylindrical body having a cylindrical shape, and the one surface is an inner circumferential surface of the cylindrical body; the combustor includes the coupled body, and the part is a constricted part protruding from the inner circumferential surface of the cylindrical body toward a radially inward direction of the cylindrical body; the cylindrical body includes an inner wall part including the inner circumferential surface of the cylindrical body and an outer wall part including an outer circumferential surface of the cylindrical body; the inner wall part and the outer wall part are provided at an interval in a thickness direction of the cylindrical body so as to form a flow path therebetween; the through hole includes a first hole part formed to penetrate the inner wall part in the thickness direction thereof, a second hole part formed to penetrate the outer wall part in the thickness direction thereof, and an intermediate hole part between the first hole part and the second hole part and forming a part of the flow path; the weld part is accommodated in the first hole part; and after a step of welding the inner circumferential surface of the through hole to the part, a step of fixing a lid part to the outer circumferential surface of the cylindrical body so as to close the through hole. . [Effects of the Invention]

[0008] of the present disclosure Combustor and this Combustor According to the method for producing Cylindrical body The part is fixed against Inner surface Opposite side Outer surface of Since it can be welded from the side, Inner surface of the cylinder Even when it is difficult to weld from the side, the workability of welding can be improved. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is an end view illustrating an example of a combined body according to the first embodiment of the present disclosure. [Figure 2] FIG. 4 is an end view showing another example of a combined body according to the first embodiment of the present disclosure. [Figure 3]FIG. 3 is a cross-sectional view taken along line III-III in FIGS. [Figure 4] FIG. 10 is a diagram showing the configuration of a portion of a combustor including a combined body according to a second embodiment of the present disclosure. [Figure 5] 10A and 10B are diagrams illustrating the configuration of a throttle portion in a combined body according to a second embodiment of the present disclosure. [Figure 6] FIG. 10 is a cross-sectional view of a portion of a combustor including a combination according to a third embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, according to the embodiment of the present disclosure Combustor Body and this Combustor The following description will be made with reference to the drawings. The embodiment described below shows one aspect of the present disclosure, and is not intended to limit the present disclosure. Any modification can be made within the scope of the technical idea of ​​the present disclosure.

[0011] (Embodiment 1) <Configuration of the combined body according to the first embodiment of the present disclosure> As shown in FIG. 1 , the combined body 1 according to the first embodiment of the present disclosure has a configuration in which, for example, an arbitrary component 3 is fixed to one surface 2 a of a plate-shaped wall body 2 by welding. Note that the wall body 2 is not limited to a plate-like shape and may have any shape. As an example of such an arbitrary shape, as shown in FIG. 2 , the wall body 2 may be a tubular body, more specifically, a cylindrical body 4. In this case, the combined body 1 has a configuration in which the component 3 is fixed to an inner circumferential surface 4 a of the tubular body 4 by welding.

[0012] As shown in Fig. 3, a through hole 5 is formed in the wall 2 so as to penetrate the wall 2 in the thickness direction. The component 3 is fixed by welding to one surface 2a of the wall 2 so as to close the through hole 5. A weld 6 that fixes the component 3 to the wall 2 is contained within the through hole 5, and the weld 6 connects a surface 3a of the component 3 that is exposed in the through hole 5 to an inner peripheral surface 5a of the through hole 5 around the entire circumference of the opening where the through hole 5 opens on the one surface 2a of the wall 2.

[0013] <Method for producing a conjugate according to embodiment 1 of the present disclosure> Next, a method for manufacturing the combined body 1 according to the first embodiment of the present disclosure will be described. This method is useful, for example, when, as shown in Fig. 1, there is an obstacle 7 on one surface 2a of the wall 2 facing the component 3, making it difficult to weld the component 3 from the one surface 2a side, or when, as shown in Fig. 2, the inner diameter of the cylindrical body 4 is small, or when the position where the component 3 is attached is located further back than the open end 4c of the cylindrical body 4, making it difficult to weld the component from inside the cylindrical body 4.

[0014] As shown in FIG. 3 , to manufacture the combined body 1, first, a through hole 5 is formed in the wall 2 in the thickness direction. Next, the part 3 is welded from one surface 2a of the wall 2 (or from the inner peripheral surface 4a if the wall 2 is a cylindrical 4) so ​​as to cover the through hole 5, and from the other surface 2b of the wall 2 (or from the outer peripheral surface 4b if the wall 2 is a cylindrical 4) so ​​as to connect the surface 3a of the part 3 exposed to the through hole 5 to the inner peripheral surface 5a of the through hole 5 around the entire circumference of the opening where the through hole 5 opens on the one surface 2a of the wall 2. At this time, it is preferable that the welded portion 6 is contained within the through hole 5, i.e., that no part of the welded portion 6 protrudes from the opening where the through hole 5 opens on the other surface 2b of the wall 2.

[0015] In this way, welding can be performed on the wall 2 from the side opposite to the side where the part 3 is fixed (the side of the surface 2a or the side of the inner peripheral surface 4a) (the side of the surface 2b or the side of the outer peripheral surface 4b), so that even when it is difficult to weld from the side where the part 3 is fixed, the workability of welding can be improved.

[0016] (Embodiment 2) Next, a description will be given of a combined body according to a second embodiment and a method for manufacturing the combined body. The combined body according to the second embodiment is limited to a cylindrical body of a combustor of a gas turbine, in contrast to the first embodiment. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0017] <Configuration of a combustor including a combined body according to the second embodiment of the present disclosure> As shown in Fig. 4, a combined body 1 according to a second embodiment of the present disclosure is a cylindrical body 11 of a combustor 10 installed in a gas turbine. The cylindrical body 11 is installed downstream of a combustion nozzle (not shown) of the combustor 10 in the flow direction A of combustion gas. Inside the cylindrical body 11, a plurality of throttle portions 12 corresponding to the component 3 (see Figs. 1 to 3) of the first embodiment are fixed to an inner circumferential surface 11a of the cylindrical body 11 by welding. The configuration in which the throttle portions 12 are fixed to the inner circumferential surface 11a of the cylindrical body 11 by welding is the same as the configuration of the first embodiment.

[0018] 5, the throttle portion 12 is provided so as to protrude radially inward from the inner circumferential surface 11a of the cylindrical body 11. The throttle portion 12 has a receiving surface 14 that faces the combustion gas flowing through the cylindrical body 11. The receiving surface 14 is inclined at an acute angle θ with respect to an imaginary plane IP perpendicular to the axial direction L of the cylindrical body 11.

[0019] <Method for manufacturing a combustor including a combined body according to the second embodiment of the present disclosure> The combustor 10 can be manufactured by welding the throttle portion 12 to the inner peripheral surface 11a from the outer peripheral surface 11b side of the cylindrical body 11 in the same manner as described in the first embodiment.

[0020] <Effects of using the combined body according to the second embodiment of the present disclosure in a combustor> 4, the farther upstream the position at which the throttle portion 12 is provided is from the downstream end 11c of the cylindrical body 11, the more difficult it becomes to weld the throttle portion 12 to the inner peripheral surface 11a of the cylindrical body 11 from the inner peripheral surface 11a side of the cylindrical body 11. In contrast, in the second embodiment, the configuration in which the throttle portion 12 is fixed to the inner peripheral surface 11a of the cylindrical body 11 by welding is the same as the configuration in the first embodiment, and therefore the operation of welding the throttle portion 12 to the inner peripheral surface 11a can be performed from the outer peripheral surface 11b side of the cylindrical body 11, thereby improving the ease of welding.

[0021] 5, during operation of the combustor 10, the combustion gas G flows through the cylindrical body 11. If the temperature of the combustion gas G near the inner circumferential surface 11a of the cylindrical body 11 becomes lower than that at the center of the cylindrical body 11, the timing at which carbon monoxide contained in the combustion gas G is converted to carbon dioxide is delayed, and the concentration of carbon monoxide in the combustion gas may increase. In contrast, in the second embodiment, the constricted portion 12 includes the receiving surface 14 having the above-described configuration. Therefore, the combustion gas G near the constricted portion 12 is deflected toward the radially inner side of the cylindrical body 11, where the temperature is higher, thereby promoting combustion and effectively reducing carbon monoxide.

[0022] <Modification of a combustor including a combined body according to the second embodiment of the present disclosure> As shown in Fig. 5, a lid 15 may be fixed by welding to the outer peripheral surface 11b of the cylindrical body 11 so as to close the through-hole 5. Even if there is a slight crack in the welded portion 6, as long as the lid 15 closes the through-hole 5, it is possible to suppress the risk of some of the combustion gas G inside the cylindrical body 11 leaking to the outside of the cylindrical body 11 through the through-hole 5. Note that this lid 15 may be provided on the combined body 1 of the first embodiment (see Figs. 1 to 3).

[0023] (Embodiment 3) Next, a description will be given of a combined body according to embodiment 3 and a method for manufacturing this combined body. The combined body according to embodiment 3 differs from embodiment 2 in that MT fins are formed on the cylindrical body 11. In embodiment 3, the same components as those in embodiment 2 are given the same reference numerals, and detailed description thereof will be omitted.

[0024] <Configuration of a combustor including a combined body according to the third embodiment of the present disclosure> As shown in FIG. 6 , in a combustor 10 including a combined assembly 1 according to a third embodiment of the present disclosure, a plurality of flow passages 20 called MT fins are formed to extend between an inner circumferential surface 11a and an outer circumferential surface 11b of a cylindrical body 11. FIG. 6 shows a configuration in which a component 3, i.e., a throttle portion 12, is provided in a portion of the cylindrical body 11 where the plurality of flow passages 20 are formed. The cylindrical body 11 includes an inner wall portion 21 including the inner circumferential surface 11a of the cylindrical body 11 and an outer wall portion 22 including the outer circumferential surface 11b of the cylindrical body 11. The inner wall portion 21 and the outer wall portion 22 are spaced apart in the thickness direction of the cylindrical body 11 so that the flow passages 20 are formed therebetween. A through-hole 5 is provided so as to penetrate each of the inner wall portion 21 and the outer wall portion 22 in the thickness direction thereof. As a result, the through hole 5 has a configuration including a first hole portion 23 formed to penetrate the inner wall portion 21 in its thickness direction, a second hole portion 24 formed to penetrate the outer wall portion 22 in its thickness direction, and an intermediate hole portion 25 that forms a part of the flow path 20 between the first hole portion 23 and the second hole portion 24. The weld portion 6 is contained within the first hole portion 23. In other words, it is preferable that the weld portion 6 does not have a portion that protrudes from the first hole portion 23 into the intermediate hole portion 25 or the second hole portion 24. A lid portion 15 is fixed to the outer peripheral surface 11b of the cylindrical body 11 so as to close the through hole 5.

[0025] <Method for producing a conjugate according to embodiment 3 of the present disclosure> Next, a method for manufacturing the combined body 1 according to the third embodiment of the present disclosure will be described. A through hole 5 is formed in the cylindrical body 11 in a portion where the multiple flow paths 20 are formed, penetrating the cylindrical body 11 in the thickness direction. Next, the constricted portion 12 is welded from the outer peripheral surface 11b of the cylindrical body 11 around the entire circumference of the opening of the through hole 5, where the through hole 5 opens to the inner peripheral surface 11a of the cylindrical body 11, to connect the surface 12a of the constricted portion 12 exposed to the through hole 5 to the inner peripheral surface 5a of the through hole 5. At this time, it is preferable that the welded portion 6 is accommodated within the first hole portion 23. If a portion of the welded portion 6 protrudes into the intermediate hole portion 25 or the second hole portion 24, it will reduce the cross-sectional area of ​​the flow path 20 or block the flow path 20. Therefore, after welding, it is confirmed that the welded portion 6 is accommodated within the first hole portion 23. If a portion of the welded portion 6 protrudes into the intermediate hole portion 25 or the second hole portion 24, it is preferable to remove the protruding portion. After welding the constricted portion 12, the lid portion 15 is fixed by welding to the outer peripheral surface 11b of the cylindrical body 11 so as to close the through hole 5. As a result, the flow path 20 is no longer in communication with the inside of the cylindrical body 11 via the first hole portion 23, and is no longer in communication with the outside of the cylindrical body 11 via the second hole portion 24.

[0026] In this way, it is possible to confirm that the welded portion 6 is housed within the first hole portion 23 before fixing the lid portion 15, thereby preventing the risk of the welded portion 6 blocking the flow path. This prevents the coolant from being blocked from flowing through the flow path 20 due to the welded portion 6. Since the coolant flows through the flow path 20 without being obstructed by the welded portion 6, the cylindrical body 11 itself can be protected from radiant heat of combustion gases, etc. Furthermore, it is possible to confirm whether the flow path 20 is blocked due to deformation of the cylindrical body 11 caused by heat during welding, so the coolant flowing through the flow path 20 can protect the cylindrical body 11 itself from the heat of combustion gases.

[0027] <Modifications of the combined bodies according to the second and third embodiments of the present disclosure> In the second and third embodiments, the component 3 is the drawn portion 12, but this is not limiting. Any component 3 other than the drawn portion 12 can be welded by the method of the present disclosure as long as it is fixed to the inner circumferential surface 11a of the cylindrical body 11 by welding, thereby improving the workability of welding.

[0028] The contents described in each of the above embodiments can be understood, for example, as follows.

[0029] [1] In one embodiment, the conjugate comprises: a wall (2) having a through hole (5) formed therein in the thickness direction; a part (3) fixed to one surface (2a) of the wall body (2) so as to close the through hole (5); Equipped with A welded portion (6) that fixes the component (3) to the one surface (2a) is accommodated in the through hole (5).

[0030] According to the combined structure of the present disclosure, welding to the wall body can be performed from the side opposite to the side where the part is fixed, thereby improving the workability of welding even when it is difficult to weld from the side where the part is fixed.

[0031] [2] Another embodiment of the conjugate is the conjugate of [1], The wall (2) is a cylindrical body (4, 11) having a cylindrical shape, and the one surface (2a) is the inner peripheral surface (4a, 11a) of the cylindrical body (4).

[0032] With this configuration, even if the inner diameter of the cylinder is small or the part is attached at a position further back than the open end of the cylinder, welding can be performed from the outer surface side of the cylinder, thereby improving welding workability.

[0033] [3] A combustor according to one aspect includes: [2] is equipped with a coupling body (1).

[0034] According to the combustor of the present disclosure, even if the position where the part is to be attached is further back than the open end of the cylindrical body, welding can be performed from the outer peripheral surface side of the cylindrical body, thereby improving the workability of welding.

[0035] [4] A combustor according to another aspect is the combustor according to [3], The cylindrical body (11) is an inner wall portion (21) including the inner circumferential surface (11a) of the cylindrical body (11); an outer wall portion (22) including the outer peripheral surface (11b) of the cylindrical body (11); Equipped with the inner wall portion (21) and the outer wall portion (22) are spaced apart in a thickness direction of the cylindrical body (11) so as to form a flow path (20) therebetween; The through hole (5) is a first hole (23) formed to penetrate the inner wall (21) in the thickness direction thereof; a second hole (24) formed to penetrate the outer wall (22) in the thickness direction thereof; an intermediate hole (25) that forms a part of the flow path (20) between the first hole (23) and the second hole (24); Equipped with The welding portion (6) is accommodated in the first hole portion (23), A lid portion (15) is fixed to the outer peripheral surface (11b) of the cylindrical body (11) so as to close the through-hole (5).

[0036] According to this configuration, it is possible to confirm that the welded portion is housed within the first hole portion before the lid portion is fixed, thereby preventing the welded portion from blocking the flow path.

[0037] [5] A combustor according to yet another aspect is the combustor according to [4], The flow path (20) is configured so that a cooling medium flows through it.

[0038] With this configuration, it is possible to prevent the coolant from being blocked from flowing through the flow passage due to the welded portion.

[0039] [6] A combustor according to yet another aspect is any one of the combustors [3] to [5], The component (3) is a throttle portion (12) that protrudes from an inner peripheral surface (11a) of the cylindrical body (11) toward the inside in the radial direction of the cylindrical body (11), The throttle portion (12) has a receiving surface (14) facing the combustion gas (G) flowing through the cylindrical body (11), The receiving surface (14) is inclined at an acute angle (θ) with respect to an imaginary plane (IP) perpendicular to the axial direction (L) of the cylindrical body (11).

[0040] With this configuration, the combustion gas near the throttle portion is deflected toward the radially inner side of the cylindrical body where the temperature is higher, thereby promoting combustion and effectively reducing carbon monoxide.

[0041] [7] A method for producing a conjugate according to one embodiment includes the steps of: A method for manufacturing a combined body (1) in which a part is fixed to a wall body (2), comprising the steps of: forming a through-hole (5) penetrating the wall (2) in the thickness direction thereof; a step of welding the inner peripheral surface (5a) of the through hole (5) and the part (3) from the other surface (2b) side of the wall body (2) so that the part (3) closes the through hole (5) from one surface (2a) of the wall body (2); Including, A welded portion (6) formed by welding the inner peripheral surface (5a) of the through hole (5) to the part (3) is accommodated within the through hole (5).

[0042] According to the method for manufacturing the combined body of the present disclosure, welding to the wall body can be performed from the side opposite to the side where the parts are fixed, thereby improving the workability of welding even when it is difficult to weld from the side where the parts are fixed.

[0043] [8] Another embodiment of the method for producing the conjugate of [7] is a method for producing the conjugate, comprising the steps of: The wall (3) is a cylindrical body (4, 11) having a cylindrical shape, and the one surface (2a) is an inner peripheral surface (4a, 11a) of the cylindrical body (4, 11).

[0044] With this method, even if the inner diameter of the cylinder is small or the part is attached at a position further back than the open end of the cylinder, welding can be performed from the outer surface side of the cylinder, thereby improving welding workability.

[0045] [9] A method for manufacturing a combustor according to one aspect includes: A method for manufacturing a combustor (10) including the combined body (1), wherein the part (3) is a constricted portion (12) protruding from the inner circumferential surface (11a) of the cylindrical body (11) toward a radially inner side of the cylindrical body (11), The present invention includes a method for producing the conjugate (1) according to claim 8.

[0046] According to the method for manufacturing a combustor of the present disclosure, even if the position at which the constriction portion is attached is located further back than the open end of the cylindrical body, welding can be performed from the outer peripheral surface side of the cylindrical body, thereby improving welding workability.

[0047]

[10] A method for manufacturing a combustor according to another aspect is a method for manufacturing the combustor according to [9], The cylindrical body (11) is an inner wall portion (21) including the inner circumferential surface (11a) of the cylindrical body (11); an outer wall portion (22) including the outer peripheral surface (11b) of the cylindrical body (11); Equipped with the inner wall portion (21) and the outer wall portion (22) are spaced apart in a thickness direction of the cylindrical body (11) so as to form a flow path (20) therebetween; The through hole (5) is a first hole (23) formed to penetrate the inner wall (21) in the thickness direction thereof; a second hole (24) formed to penetrate the outer wall (22) in the thickness direction thereof; an intermediate hole (25) that forms a part of the flow path (20) between the first hole (23) and the second hole (24); Equipped with The welding portion (6) is accommodated in the first hole portion (23), After the step of welding the inner peripheral surface (5a) of the through hole (5) to the part (3), a step of fixing a lid portion (15) to the outer peripheral surface (11b) of the cylindrical body (11) so as to close the through hole (5) is provided.

[0048] According to this method, it is possible to confirm that the welded portion is housed within the first hole portion before the lid portion is fixed, thereby preventing the welded portion from blocking the flow path. [Explanation of symbols]

[0049] 1 conjugate 2 wall 2a (one side of a wall) 2b (the other side of the wall) 3 parts 4 cylinder 4a (Cylindrical) inner surface 4b (Cylindrical) outer surface 5 through holes 5a (through hole) inner surface 6 Welded parts 10 Combustor 11 Cylinder 11a (cylindrical) inner surface 11b (Cylinder) outer circumferential surface 12. Constriction section 14 Receiving surface 15 Lid 20 Flow path 21 Inner wall 22 Exterior wall 23 1st hole 24 2nd hole 25 Intermediate hole G Combustion gas L (Cylindrical) Axial Direction IP Virtual Plane θ angle

Claims

1. A combustor having a combination, The conjugate is a wall body having a through hole formed therein that penetrates the wall body in a thickness direction; a component fixed to one surface of the wall body so as to close the through hole; Equipped with a welded portion welded to fix the component to the one surface is accommodated in the through hole; the wall body is a cylindrical body having a cylindrical shape, and the one surface is an inner circumferential surface of the cylindrical body, The cylindrical body is an inner wall portion including the inner circumferential surface of the cylindrical body; an outer wall portion including an outer peripheral surface of the cylindrical body; Equipped with the inner wall portion and the outer wall portion are spaced apart in a thickness direction of the cylindrical body so as to form a flow path therebetween, The through hole is a first hole formed to penetrate the inner wall portion in a thickness direction thereof; a second hole formed to penetrate the outer wall portion in a thickness direction thereof; an intermediate hole portion that forms a part of the flow path between the first hole portion and the second hole portion; Equipped with the weld is accommodated in the first hole; A combustor having a lid portion fixed to the outer peripheral surface of the cylindrical body so as to close the through hole.

2. The combustor of claim 1 , wherein the flow passage is configured to carry a cooling medium.

3. the component is a narrowed portion that protrudes from the inner circumferential surface of the cylindrical body toward a radially inner side of the cylindrical body, the throttle portion has a receiving surface facing the combustion gas flowing through the cylindrical body, The combustor according to claim 1 or 2, wherein the receiving surface is inclined at an acute angle with respect to an imaginary plane perpendicular to the axial direction of the cylindrical body.

4. A method of manufacturing a combustor, including a method of manufacturing a combination having components fixed to a wall, comprising: The method for producing the conjugate comprises: forming a through hole penetrating the wall in a thickness direction thereof; a step of welding the inner circumferential surface of the through hole and the part from the other surface side of the wall body so that the part closes the through hole from one surface of the wall body; Including, a welded portion formed by welding the inner circumferential surface of the through hole to the component is accommodated within the through hole; the wall body is a cylindrical body having a cylindrical shape, and the one surface is an inner circumferential surface of the cylindrical body, the combustor includes the combined body, wherein the part is a constricted portion that protrudes from the inner circumferential surface of the cylindrical body toward a radially inner side of the cylindrical body; The cylindrical body is an inner wall portion including the inner circumferential surface of the cylindrical body; an outer wall portion including an outer peripheral surface of the cylindrical body; Equipped with the inner wall portion and the outer wall portion are spaced apart in a thickness direction of the cylindrical body so as to form a flow path therebetween, The through hole is a first hole formed to penetrate the inner wall portion in a thickness direction thereof; a second hole formed to penetrate the outer wall portion in a thickness direction thereof; an intermediate hole portion that forms a part of the flow path between the first hole portion and the second hole portion; Equipped with the weld is accommodated in the first hole; a step of welding the inner circumferential surface of the through hole to the part, and then a step of fixing a lid portion to the outer circumferential surface of the cylindrical body so as to close the through hole.

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