Support device and method for manufacturing the same

Abstract

This support device comprises: at least one first strut that has a first proximal end to be connected to a first wall and a first distal end, and extends from the first proximal end to the first distal end toward a second wall; at least one second strut that has a second proximal end to be connected to the second wall and a second distal end positioned closer to the first wall that the first distal end, and extends from the second proximal end to the second distal end toward the first wall through the first distal end; and a connecting portion that has at least one third strut extending along the extension direction of the first strut and the second strut in a position range between the first distal end and the second distal end in the extension direction, and connects the first distal end of the first strut and the second distal end of the second strut.

Description

[Technical Field]

[0001] TECHNICAL FIELD The present disclosure relates to a support device and a method for manufacturing a support device. This application claims priority based on Japanese Patent Application No. 2022-178109, filed with the Japan Patent Office on November 7, 2022, the contents of which are incorporated herein by reference. [Background technology]

[0002] BACKGROUND ART Support devices are known that support a first member and a second member while allowing the first member and the second member to move relative to each other. For example, the device described in Patent Document 1 is configured to be able to support the float while allowing relative movement between the transverse bulkhead and the float. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-151695 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the combustor of an industrial gas turbine, for example, it is desirable to support pipes arranged along the side of the combustion liner, such as pipes for circulating cooling steam, on the combustion liner. When these pipes are attached to the combustion liner via a support device, the support device must be designed to be able to absorb the thermal expansion of the pipes and the combustion liner. However, if the float support structure described in the above-mentioned patent document is adopted as the support device in this case, it is difficult to configure the support device so that it can absorb the thermal expansion described above while ensuring the necessary support strength within the limited space on the side of the combustion tube.

[0005] In view of the above circumstances, at least one embodiment of the present disclosure has an object to provide a support device that allows a first member and a second member to support each other while allowing relative movement between the first member and the second member. [Means for solving the problem]

[0006] (1) A support device according to at least one embodiment of the present disclosure, A support device for supporting a second member having a second wall facing a first member having a first wall, the support device comprising: at least one first strut having a first base end connected to the first wall and a first distal end opposite the first base end, the first strut extending from the first base end to the first distal end toward the second wall; at least one second strut having a second base end connected to the second wall and a second tip end opposite the second base end and positioned closer to the first wall than the first tip end, the second strut passing through the first tip end from the second base end to the second tip end toward the first wall; The strut has at least one third strut extending along the extension direction in a positional range between the first tip end and the second tip end in the extension direction of the first strut and the second strut, and a connecting portion connecting the first tip end of the first strut and the second tip end of the second strut.

[0007] (2) A method for manufacturing a support device according to at least one embodiment of the present disclosure includes: A method for manufacturing a support device for supporting a second member having a second wall facing a first member having a first wall, the method comprising: at least one first strut having a first base end connected to the first wall and a first distal end opposite the first base end, the first strut extending from the first base end to the first distal end toward the second wall; at least one second strut having a second base end connected to the second wall and a second tip end opposite the second base end and positioned closer to the first wall than the first tip end, the second strut passing through the first tip end from the second base end to the second tip end toward the first wall; a connecting portion including at least one third strut extending along the extension direction of the first strut and the second strut in a positional range between the first tip end and the second tip end in the extension direction of the first strut and the second strut, the connecting portion connecting the first tip end of the first strut and the second tip end of the second strut; are integrally formed by additive manufacturing. [Effects of the Invention]

[0008] According to at least one embodiment of the present disclosure, it is possible to provide a support device that allows a first member and a second member to support each other while allowing relative movement between the first member and the second member. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic configuration diagram of a gas turbine according to an embodiment. [Figure 2] 1 is a schematic diagram illustrating a combustor and turbine inlet section of a gas turbine according to an embodiment; [Figure 3A] FIG. 2 is a perspective, half-sectional view of a support device according to one embodiment. [Figure 3B] FIG. 10 is a perspective, half-sectional view of a support device according to another embodiment. [Figure 4A] 1 is a schematic cross-sectional view illustrating an example of a structure of a support device according to some embodiments. [Figure 4B] FIG. 10 is a schematic cross-sectional view illustrating another example of the structure of the support device according to some embodiments. [Figure 4C] FIG. 10 is a schematic cross-sectional view illustrating another example of the structure of the support device according to some embodiments. [Figure 4D]FIG. 10 is a schematic cross-sectional view illustrating another example of the structure of the support device according to some embodiments. [Figure 5A] FIG. 4B is a cross-sectional view taken along the line AA in FIG. 4A. [Figure 5B] FIG. 4C is a cross-sectional view taken along the arrow BB in FIG. 4B. [Figure 5C] FIG. 4C is a cross-sectional view taken along the arrow CC in FIG. 4B. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, several embodiments of the present disclosure will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of components described as embodiments or shown in the drawings are merely illustrative examples and are not intended to limit the scope of the present disclosure. For example, expressions expressing relative or absolute arrangement such as "in a certain direction," "along a certain direction," "parallel," "orthogonal," "center," "concentric," or "coaxial" not only express such an arrangement exactly, but also express a state in which there is a relative displacement with a tolerance or an angle or distance to the extent that the same function is obtained. For example, expressions such as "identical," "equal," and "homogeneous" that indicate that something is in an equal state not only indicate a state of strict equality, but also indicate a state in which there is a tolerance or a difference to the extent that the same function is obtained. For example, expressions representing shapes such as a square shape or a cylindrical shape not only represent shapes such as a square shape or a cylindrical shape in the strict geometric sense, but also represent shapes including uneven portions, chamfered portions, etc., to the extent that the same effect can be obtained. On the other hand, the expressions "comprise," "include," "have," "includes," or "have" of one element are not exclusive expressions that exclude the presence of other elements.

[0011] First, a gas turbine, which is an example of an application of a support device according to an embodiment, will be described with reference to Fig. 1. Fig. 1 is a schematic configuration diagram of a gas turbine according to an embodiment. 1, the gas turbine 1 includes a compressor 2 for generating compressed air, a combustor 4 for generating combustion gas using the compressed air and fuel, and a turbine 6 configured to be rotationally driven by the combustion gas. In the case of a gas turbine 1 for power generation, a generator (not shown) is connected to the turbine 6.

[0012] The compressor 2 includes a plurality of stator vanes 16 fixed to the compressor casing 10 side, and a plurality of rotor blades 18 implanted in the rotor 8 so as to be arranged alternately with respect to the stator vanes 16 . Air taken in through an air intake 12 is sent to the compressor 2, and this air is compressed as it passes through a plurality of stator vanes 16 and a plurality of rotor blades 18, becoming high-temperature, high-pressure compressed air.

[0013] The combustor 4 is supplied with fuel and compressed air generated by the compressor 2, and the fuel is combusted in the combustor 4 to generate combustion gas, which is the working fluid of the turbine 6. As shown in FIG. 1 , the gas turbine 1 has a plurality of combustors 4 arranged in a casing 20 along the circumferential direction around a rotor 8.

[0014] The turbine 6 has a combustion gas passage 28 formed by the turbine casing 22, and includes a plurality of stator vanes 24 and rotor blades 26 provided in the combustion gas passage 28. The stator vanes 24 and rotor blades 26 of the turbine 6 are provided downstream of the combustor 4 with respect to the flow of combustion gas. The stator vanes 24 are fixed to the turbine casing 22 side, and a plurality of the stator vanes 24 arranged along the circumferential direction of the rotor 8 constitute a stator vane row. The moving blades 26 are implanted in the rotor 8, and a plurality of the moving blades 26 arranged along the circumferential direction of the rotor 8 constitute a moving blade row. The stator vane rows and moving blade rows are arranged alternately in the axial direction of the rotor 8. In the turbine 6, the combustion gas from the combustor 4 flows into a combustion gas passage 28 and passes through the plurality of stator vanes 24 and the plurality of rotor blades 26, thereby driving the rotor 8 to rotate about the axis O, which in turn drives a generator connected to the rotor 8 to generate electricity. After driving the turbine 6, the combustion gas is discharged to the outside via an exhaust chamber 30.

[0015] (Combustor 4) Next, the combustor 4 according to one embodiment will be described. FIG. 2 is a schematic diagram showing an inlet portion of a combustor 4 and a turbine 6 of a gas turbine 1 according to one embodiment.

[0016] In a gas turbine 1 according to some embodiments, each of the plurality of combustors 4 (see FIG. 1 ) arranged in the circumferential direction around the rotor 8 includes a combustion liner 36 provided in a combustor casing 32 defined by the casing 20, and a first combustion burner 38 and a plurality of second combustion burners 44 arranged to surround the first combustion burner 38, each of which is arranged in the combustion liner 36. That is, the combustion liner 36, the first combustion burner 38, and the second combustion burner 44 are housed in the casing 20.

[0017] The combustion liner (combustor liner) 36 has an inner liner 48 disposed around the first combustion burner 38 and the plurality of second combustion burners 44, and a transition piece 50 connected to the tip of the inner liner 48. The inner liner 48 and the transition piece 50 may be formed integrally.

[0018] The first combustion burner 38 is disposed along the direction of the central axis C1 of the combustion liner 36 (i.e., the axial direction of the combustor 4), and has a first fuel nozzle 40 for injecting fuel. Fuel is supplied to the first fuel nozzle 40 via a first fuel port 42.

[0019] The second combustion burner 44 has a second fuel nozzle 46 for injecting fuel. Fuel is supplied to the second fuel nozzle 46 through a second fuel port 43.

[0020] The combustor 4 further includes an outer casing 52 provided on the outer circumferential side of the inner casing 48 inside the casing 20. An air passage 54 through which compressed air flows is formed on the outer circumferential side of the inner casing 48 and on the inner circumferential side of the outer casing 52.

[0021] Compressed air generated by the compressor 2 (see FIG. 1) is supplied into the combustor casing 32 through the casing inlet 31, and the compressed air flows from the combustor casing 32 into the air passage 54 as combustion air, and flows along a plane perpendicular to the axial direction of the combustor 4. How to The air is redirected and flows into the burner tubes of the combustion burners 38, 44. In each burner tube, the fuel injected from the fuel nozzle is mixed with compressed air (air for combustion), and this mixture flows into the combustion tube 36, where it is ignited and combusted, generating combustion gas.

[0022] The above-mentioned first combustion burner 38 may be a burner for generating a diffusion combustion flame, and the second combustion burner 44 may be a burner for burning a premixed gas to generate a premixed combustion flame.

[0023] The combustion gas thus generated by the combustion of fuel in the combustor 4 flows into the turbine 6 via an outlet 51 of the combustor 4 located at the downstream end of the transition piece 50 .

[0024] The combustor 4 may include other components such as a bypass pipe (not shown) for bypassing the combustion gas.

[0025] (Regarding the support device 100) FIG. 3A is a perspective, half-sectional view of a support device 100 according to one embodiment. FIG. 3B is a perspective half-sectional view of a support device 100 according to another embodiment. FIG. 4A is a schematic cross-sectional view illustrating an example of the structure of the support device 100 according to some embodiments. FIG. 4B is a schematic cross-sectional view for explaining another example of the structure of the support device 100 according to some embodiments. FIG. 4C is a schematic cross-sectional view for explaining another example of the structure of the support device 100 according to some embodiments. FIG. 4D is a schematic cross-sectional view for explaining another example of the structure of the support device 100 according to some embodiments. The support device 100 according to some embodiments is a support device 100 for supporting a second member having a second wall facing a first member having a first wall. A support device 100 according to some embodiments is a support device that supports a steam pipe 72 as a first member and a combustion liner 36 as a second member while allowing relative movement between the two members. The steam pipe 72 is a pipe through which steam for cooling the combustor 4 flows, for example. Cooling steam is supplied to the steam pipe 72 via a steam port 74. In some embodiments, the support device 100 comprises at least one first strut 111, at least one second strut 121, and a linking portion 150.

[0026] (1st strut 111) In some embodiments of the support device 100, the first strut 111 is a columnar or rod-shaped member having a first base end 112 connected to the pipe wall 73 of the steam pipe 72 as the first wall and a first tip end 113 which is the end opposite to the first base end 112, and extending from the first base end 112 to the first tip end 113 toward the cylindrical body 39 as the second wall. In the support device 100 shown in FIGS. 3A and 3B, for example, eight first struts 111 are arranged at intervals in the circumferential direction around the central axis Ax of the support device 100.

[0027] (First end plate 101) As shown in Figures 3A, 3B, 4A, 4B, 4C, and 4D, in some embodiments of the support device 100, the first base end 112 is connected to the tube wall 73 as the first wall via the first end plate 101. The first end plate 101 is, for example, an annular member having an opening 101a. In some embodiments, the support device 100 includes the first end plate 101, which makes it easier to connect the support device 100 to the vessel wall 73 compared to directly connecting each of the first proximal ends 112 of the first struts 111 to the vessel wall 73. In the support device 100 according to some embodiments, the first base end portion 112 may be connected directly to the pipe wall 73 without the first end plate 101 interposed therebetween.

[0028] (Second strut 121) In some embodiments of the support device 100, the second strut 121 has a second base end 122 connected to the cylindrical body 39 as the second wall, and a second tip end 123 at the end opposite the second base end 122, which is located closer to the tube wall 73 as the first wall than the first tip end 113, and is a columnar or rod-like member extending from the second base end 122 to the second tip end 123, passing through the first tip end 113, toward the tube wall 73 as the first wall. In the support device 100 shown in FIGS. 3A and 3B, for example, eight second struts 121 are arranged at intervals in the circumferential direction around the central axis Ax of the support device 100.

[0029] (Second end plate 102) As shown in Figures 3A, 3B, 4A, 4B, 4C, and 4D, in some embodiments of the support device 100, the second base end 122 is connected to the cylinder 39 as the second wall via the second end plate 102. The second end plate 102 is, for example, a disk-shaped member, but may have an opening like the first end plate 101. In some embodiments, the support device 100 includes the second end plate 102, which makes it easier to connect the support device 100 to the barrel 39 than if each of the second base ends 122 of the multiple second struts 121 were directly connected to the barrel 39. In the support device 100 according to some embodiments, the second base end portion 122 may be connected directly to the cylindrical body 39 without the second end plate 102 being interposed therebetween.

[0030] (Connection part 150) In some embodiments of the support device 100, the connecting portion 150 has at least one third strut 131 extending along the extension direction in a position range between the first tip 113 and the second tip 123 in the extension direction of the first strut 111 and the second strut 121, and is configured to connect the first tip 113 of the first strut 111 and the second tip 123 of the second strut 121. In the support device 100 shown in FIGS. 3A and 3B, for example, eight third struts 131 are arranged at intervals in the circumferential direction around the central axis Ax of the support device 100.

[0031] As described above, in the support device 100 according to some embodiments, the first strut 111 and the second strut 121 are connected in series in a zigzag shape via the connecting portion 150. That is, in the support device 100 according to some embodiments, the first strut 111, the connecting portion 150, and the second strut 121 are connected in series in a zigzag shape.

[0032] According to the support device 100 having the above-described structure and some embodiments, the first struts 111 and the second struts 121 can bend in a direction intersecting the extension direction, thereby supporting the opposing components (the steam pipe 72 and the combustion liner 36) while allowing the relative positions of the steam pipe 72 and the combustion liner 36 to change in a direction intersecting the extension direction. In other words, according to the support device 100 having the above-described structure and some embodiments, the support strength for supporting the opposing components can be ensured while absorbing displacement between the steam pipe 72 as the first component and the combustion liner 36 as the second component in a direction intersecting the extension direction.

[0033] In addition, the support device 100 in some embodiments may be attached to the steam pipe 72 and the combustion tube 36 in the position shown in Figures 3A, 3B, 4A, 4B, 4C, and 4D, or may be attached to the steam pipe 72 and the combustion tube 36 in a position that is upside down from the position shown in Figures 3A, 3B, 4A, 4B, 4C, and 4D.

[0034] As shown in Figures 3A, 3B, 4A, 4B, and 4C, some embodiments of the support device 100 may include multiple first struts 111. In some embodiments of the support device 100, the number of first struts 111 may be three or more. Similarly, as shown in Figures 3A, 3B, 4A, 4B, and 4C, some embodiments of the support device 100 may include multiple second struts 121. Some embodiments of the support device 100 may include three or more second struts 121.

[0035] As shown in Figures 3A, 3B, 4A, 4B, and 4C, in some embodiments of the support device 100, the multiple first struts 111, the multiple second struts 121, and the multiple third struts 131 may be arranged in a circumferential direction of three or more around the central axis Ax along the extension direction. This makes it possible to prevent the rigidity of the support device 100 from decreasing in a specific lateral direction when the steam pipe 72 and the combustion liner 36 are displaced in the lateral direction.

[0036] (Minimum configuration of support device 100) In some embodiments, the support device 100 may have a minimum configuration of a connecting portion 150 having one first strut 111, one second strut 121, and one third strut 131, as shown in FIG. 4D. In the support device 100 shown in Figure 4D, the third strut 131 of the connecting portion 150 has one end 132 connected to the first tip portion 113 and the other end 133 connected to the second tip portion 123 at a position closer to the tube wall 73 as the first wall than the one end 132. The first tip portion 113 and one end 132 of the third strut 131 may be connected via a first connecting portion 151 for connecting the first tip portion 113 and one end 132 of the third strut 131, as shown in Figure 4D, or they may be connected directly without via the first connecting portion 151. Similarly, the second tip portion 123 and the other end 133 of the third strut 131 may be connected via a second connecting portion 152 for connecting the second tip portion 123 and the other end 133 of the third strut 131, as shown in Figure 4D, or they may be connected directly without via the second connecting portion 152.

[0037] In the support device 100 shown in Figures 3A, 3B, 4A, 4B, and 4C, similar to the support device 100 shown in Figure 4D, the third strut 131 of the connecting portion 150 has one end 132 connected to the first tip portion 113 and the other end 133 connected to the second tip portion 123 at a position closer to the pipe wall 73 as the first wall than the one end 132. This makes it possible to absorb displacement in the lateral direction between the steam pipe 72 and the combustion liner 36, i.e., in a direction intersecting the extension direction of the first strut 111 and the second strut 121, with a relatively simple configuration. Also, in the support device 100 shown in Figures 3A, 3B, 4A, 4B, 4C, and 4D, one end 132 and the other end 133 of the third strut 131 are connected to the first tip portion 113 of the first strut 111 and the second tip portion 123 of the second strut 121, respectively, so that the size and weight of these connection portions can be reduced. This increases the natural frequency of the support device 100 itself, thereby avoiding resonance and preventing damage or malfunction of the support device 100.

[0038] In the support device 100 shown in FIGS. 3A, 3B, 4A, 4B, and 4C, the linking portion 150 includes a plurality of third struts 131. As a result, the first strut 111, the third strut 131, and the second strut 121 are connected in a zigzag manner, so that even if the distance between the steam pipe 72 and the combustion chamber 36 is short, it is possible to allow lateral displacement between the steam pipe 72 and the combustion chamber 36 while suppressing vertical displacement between the steam pipe 72 and the combustion chamber 36, i.e., in the extension direction.

[0039] In some embodiments, when the support device 100 has two or more first struts 111, the first struts 111 may be spaced apart in the circumferential direction around the central axis Ax of the support device 100. Similarly, in some embodiments, when the support device 100 has two or more second struts 121, each second strut 121 may be spaced apart in the circumferential direction around the central axis Ax of the support device 100.

[0040] (Radial position of each strut) 3A, 3B, 4A, 4B, and 4C, the connecting portion 150 includes a first connecting portion 151 to which first tip ends 113 of a plurality of first struts 111 that are arranged circumferentially at a first radial position Pd1 around a central axis Ax that is aligned in the extension direction, and a second connecting portion 152 to which second tip ends 123 of a plurality of second struts 121 that are arranged circumferentially at a second radial position Pd2 that is more inward than the first radial position Pd1. The first connecting portion 151 is connected to the second connecting portion 152 via a third strut 131. As will be explained later, when the first strut 111 and the second strut 121 are inclined with respect to the central axis Ax, as in the support device 100 shown in Figure 4B, the radial positions at 1 / 2 of the length along the extension direction of the first strut 111 and the second strut 121 are defined as the first radial position Pd1 and the second radial position Pd2.

[0041] That is, in the support device 100 shown in Figures 3A, 3B, 4A, 4B, and 4C, each of the second struts 121 is positioned radially inward about the central axis Ax than each of the first struts 111.

[0042] 3A, 3B, 4A, and 4B, the first coupling portion 151 and the second coupling portion 152 are connected by a plurality of third struts 131 that are arranged at intervals in the circumferential direction around the central axis Ax. That is, in the support device 100 shown in Figures 3A, 3B, 4A, and 4B, one ends 132 of the plurality of third struts 131 that are arranged in parallel are connected to the first coupling portion 151, and the other ends 133 of the plurality of third struts 131 that are arranged in parallel are connected to the second coupling portion 152.

[0043] In the support device 100 shown in FIG. 4C, the connecting portion 150 has a plurality of third struts 131 arranged at different positions in the radial direction around the central axis Ax. Specifically, in the support device 100 shown in Figure 4C, the connecting portion 150 has a plurality of outer third struts 131A arranged at intervals in the circumferential direction at a third radial position Pd3 that is radially inward from the above-mentioned first radial position Pd1 and closest to the first radial position Pd1. In the support device 100 shown in Figure 4C, the connecting portion 150 has a plurality of intermediate third struts 131B arranged at intervals in the circumferential direction at a fourth radial position Pd4 that is radially inward from the third radial position Pd3 described above and closest to the third radial position Pd3. 4C, the connecting portion 150 has a plurality of inner third struts 131C arranged at intervals in the circumferential direction at a fifth radial position Pd5 that is radially inward of and closest to the fourth radial position Pd4 described above. Note that the fifth radial position Pd5 is radially outward of and closest to the second radial position Pd2 described above.

[0044] In the support device 100 shown in Figure 4C, one ends 132 of multiple outer third struts 131A arranged in parallel are connected to the first connecting portion 151, and the other ends 133 of multiple inner third struts 131C arranged in parallel are connected to the second connecting portion 152.

[0045] In the support device 100 shown in Figure 4C, the connecting portion 150 has an outer third connecting portion 153A that connects the other ends 133 of multiple outer third struts 131A arranged in parallel to one ends 132 of multiple intermediate third struts 131B arranged in parallel. In the support device 100 shown in Figure 4C, the connecting portion 150 has an inner third connecting portion 153B that connects the other ends 133 of multiple parallel-arranged intermediate third struts 131B to one ends 132 of multiple parallel-arranged inner third struts 131C.

[0046] In this way, in the support device 100 according to some embodiments, the first strut 111, the third strut 131, and the second strut 121 are connected in a zigzag manner, so that displacement between the steam pipe 72 and the combustion liner 36 in the horizontal direction, i.e., in a direction intersecting the extension direction of the first strut 111 and the second strut 121, can be permitted, while displacement between the steam pipe 72 and the combustion liner 36 in the vertical direction, i.e., in the above-mentioned extension direction, can be made relatively small.

[0047] In the support device 100 shown in Figure 4C, three third struts 131, namely, the outer third strut 131A, the middle third strut 131B, and the inner third strut 131C, are connected in series at the connecting portion 150, but an odd number of five or more third struts 131 may also be connected in series.

[0048] (Regarding the position of each connecting part and each end plate) In the support device 100 according to some embodiments, the second connecting portion 152 may or may not overlap with the first end plate 101 in the axial direction centered on the central axis Ax. In the support device 100 according to some embodiments, the first connecting portion 151 may or may not overlap with the second end plate 102 in the axial direction centered on the central axis Ax. In some embodiments of the support device 100, the outer third connecting portion 153A may or may not overlap with the second connecting portion 152 or the first end plate 101 in the axial direction centered on the central axis Ax. In some embodiments of the support device 100, the inner third connecting portion 153B may or may not overlap with the first connecting portion 151 or the second end plate 102 in the axial direction centered on the central axis Ax.

[0049] In the support device 100 shown in Figures 3A, 3B, 4A, 4B, and 4C, the first connector 151 is an annular connector having first openings 151a through which multiple second struts 121 can pass. In the support device 100 shown in Figures 3A, 3B, 4A, 4B, and 4C, each of the second struts 121 is arranged to pass through the first openings 151a of the first connector 151. As a result, each second strut 121 that passes through the first tip portion 113 and extends to the second base end portion 122 toward the pipe wall 73 passes through the first opening 151a of the first connecting portion 151 to which the multiple first tip portions 113 are connected, preventing interference between the second struts 121 and the first connecting portion 151. Furthermore, in the support device 100 shown in Figures 3A, 3B, 4A, 4B, and 4C, by providing the first opening 151a in the first connecting portion 151, the weight of the first connecting portion 151 can be reduced and the natural frequency of the support device 100 itself can be increased, thereby avoiding resonance and preventing damage to or malfunction of the support device 100.

[0050] In the support device 100 shown in FIGS. 3A, 3B, 4A, 4B, and 4C, the second connecting portion 152 may be an annular connecting portion having a second opening 152a. By providing the second opening 152a, the weight of the second connecting portion 152 can be reduced and the natural frequency of the support device 100 itself can be increased, so that resonance can be avoided and damage or malfunction of the support device 100 can be prevented.

[0051] In the support device 100 shown in Fig. 4C, the inner third connecting portion 153B is an annular connecting portion having openings 153Ba through which multiple second struts 121 can pass. In the support device 100 shown in Fig. 4C, each of the second struts 121 is arranged to pass through openings 153Ba of the inner third connecting portion 153B.

[0052] In the support device 100 shown in Fig. 4B, each of the third struts 131 is inclined with respect to the central axis Ax so that the size of the second connecting portion 152 decreases. That is, in the support device 100 shown in Fig. 4B, each of the third struts 131 is arranged so that it approaches the central axis Ax from one end 132 connected to the first connecting portion 151 to the other end 133 connected to the second connecting portion 152. This allows the size and weight of the second connecting portion 152 to be reduced, and the natural frequency of the support device 100 itself to be increased, so that resonance can be avoided and damage or malfunction of the support device 100 can be prevented.

[0053] In the support device 100 shown in Figure 4B, in order to reduce the size of the first connecting portion 151 by reducing the size of the first opening 151a of the first connecting portion 151, each of the second struts 121 is arranged so that it approaches the central axis Ax as it moves from the second tip end 123 connected to the second connecting portion 152 to the second base end 122 connected to the second end plate 102. This allows the size and weight of the first connecting portion 151 to be reduced, and the natural frequency of the support device 100 itself to be increased, so that resonance can be avoided and damage or malfunction of the support device 100 can be prevented. However, in the support device 100 shown in FIG. 4B, in order to reduce the size of the second connecting portion 152, each of the second struts 121 may be arranged so that it moves away from the central axis Ax as it moves from the second tip end 123 connected to the second connecting portion 152 to the second base end 122 connected to the second end plate 102.

[0054] In the support device 100 shown in Figure 4B, each of the first struts 111 is arranged so that it approaches the central axis Ax as it moves from the first base end 112 connected to the first end plate 101 to the first tip end 113 connected to the first connecting portion 151. This allows the size and weight of the first connecting portion 151 to be reduced, and the natural frequency of the support device 100 itself to be increased, so that resonance can be avoided and damage or malfunction of the support device 100 can be prevented.

[0055] In the support device 100 shown in Fig. 4B, each of the first struts 111, each of the second struts 121, and each of the third struts 131 are arranged so as to be inclined with respect to the central axis Ax. However, in the support device 100 shown in Fig. 4B, as long as at least one of each of the second struts 121 or each of the third struts 131 is arranged so as to be inclined with respect to the central axis Ax, each of the first struts 111 does not have to be inclined with respect to the central axis Ax. Similarly, in the support device 100 shown in FIG. 4B, if at least one of the first struts 111 or the third struts 131 is arranged so as to be inclined with respect to the central axis Ax, then each of the second struts 121 does not have to be inclined with respect to the central axis Ax. In the support device 100 shown in FIG. 4B, if at least one of the first struts 111 or the second struts 121 is arranged so as to be inclined with respect to the central axis Ax, then the third struts 131 do not have to be inclined with respect to the central axis Ax.

[0056] In the support device 100 shown in FIG. 4C, each of the first struts 111 may be arranged so as to be inclined relative to the central axis Ax, and each of the second struts 121 may be arranged so as to be inclined relative to the central axis Ax. In the support device 100 shown in FIG. 4C, each of the outer third struts 131A may be arranged so as to be inclined relative to the central axis Ax, each of the intermediate third struts 131B may be arranged so as to be inclined relative to the central axis Ax, and each of the inner third struts 131C may be arranged so as to be inclined relative to the central axis Ax.

[0057] (Regarding the radial position of the end of each strut) FIG. 5A is a cross-sectional view taken along the line AA in FIG. 4A. FIG. 5B is a cross-sectional view taken along the arrow BB in FIG. 4B. FIG. 5C is a cross-sectional view taken along the line CC in FIG. 4B. In the support device 100 shown in Figure 4A, as shown in Figure 5A, each of the second tip portions 123 of the multiple second struts 121 and each of the other ends 133 of the multiple third struts 131 are positioned at different radial positions in the second connecting portion 152. In the support device 100 shown in Figure 4A, similar to the second connecting portion 152, each of the first tip portions 113 of the multiple first struts 111 and each of the one ends 132 of the multiple third struts 131 are arranged at different radial positions in the first connecting portion 151.

[0058] In the support device 100 shown in Figure 4B, as shown in Figure 5B, each of the second tip portions 123 of the multiple second struts 121 and each of the other ends 133 of the multiple third struts 131 are arranged alternately in the circumferential direction at the same radial position in the second connecting portion 152. According to the support device 100 shown in FIG. 4B, the size and weight of the second connecting portion 152 can be reduced, and the natural frequency of the support device 100 itself can be increased, thereby avoiding resonance and preventing damage or functional failure of the support device 100.

[0059] In the support device 100 shown in Figure 4C, similar to the support device 100 shown in Figure 4B, each of the second tip portions 123 of the multiple second struts 121 and each of the other ends 133 of the multiple inner third struts 131C may be arranged alternately in the circumferential direction at the same radial position in the second connecting portion 152.

[0060] In the support device 100 shown in Figure 4B, as shown in Figure 5C, each of the first tip portions 113 of the multiple first struts 111 and each of the one ends 132 of the multiple third struts 131 are arranged alternately in the circumferential direction at the same radial position in the first connecting portion 151. According to the support device 100 shown in FIG. 4B, the size and weight of the first connecting portion 151 can be reduced, and the natural frequency of the support device 100 itself can be increased, thereby avoiding resonance and preventing damage or functional failure of the support device 100.

[0061] In the support device 100 shown in Figure 4A, similar to the support device 100 shown in Figure 4B, each of the first tip portions 113 of the multiple first struts 111 and each of the one ends 132 of the multiple third struts 131 may be arranged alternately in the circumferential direction at the same radial position in the first connecting portion 151. In the support device 100 shown in Figure 4C, similar to the support device 100 shown in Figure 4B, each of the first tip portions 113 of the multiple first struts 111 and each of the one ends 132 of the multiple outer third struts 131A may be arranged alternately in the circumferential direction at the same radial position in the first connecting portion 151.

[0062] In the support device 100 shown in Figure 4C, similar to the first connecting portion 151 and the second connecting portion 152 of the support device 100 shown in Figure 4B, each of the other ends 133 of the multiple outer third struts 131A and each of the one ends 132 of the multiple intermediate third struts 131B may be arranged alternately in the circumferential direction at the same radial position in the outer third connecting portion 153A. In the support device 100 shown in Figure 4C, similar to the first connecting portion 151 and the second connecting portion 152 of the support device 100 shown in Figure 4B, each of the other ends 133 of the multiple intermediate third struts 131B and each of the one ends 132 of the multiple inner third struts 131C may be arranged alternately in the circumferential direction at the same radial position in the inner third connecting portion 153B.

[0063] The support device 100 shown in Fig. 4C includes a third connecting portion 153. In the support device 100 shown in Fig. 4C, the third connecting portion 153 includes an outer third connecting portion 153A and an inner third connecting portion 153B. The outer third connecting portion 153A is connected to the other end 133, which is one end of the outer third strut 131A in the extension direction, and the one end 132, which is one end of the intermediate third strut 131B in the extension direction. The inner third connecting portion 153B is connected to the other end 133 of the intermediate third strut 131B, which is the other end in the extension direction, and the one end 132 of the inner third strut 131C, which is the other end in the extension direction.

[0064] 4C includes a third connector 153 to which the ends (one end 132, the other end 133) of the multiple third struts are connected. Of the multiple third struts 131, two third struts 131 (for example, an outer third strut 131A and an intermediate third strut 131B) that are adjacent in the radial direction about the central axis Ax are connected at one end of the third struts 131 (the other end 133 of the outer third strut 131A and one end 132 of the intermediate third strut 131B) via the third connector 153 (the outer third connector 153A). Of the multiple third struts 131, two third struts 131 (for example, an intermediate third strut 131B and an inner third strut 131C) that are adjacent in the radial direction centered on the central axis Ax have their other ends (the other end 133 of the intermediate third strut 131B and one end 132 of the inner third strut 131C) connected via a third connecting portion 153 (the inner third connecting portion 153B).

[0065] That is, the support device 100 shown in FIG. 4C includes third connecting portions 153 that connect one end or the other end of the plurality of third struts 131 in the extending direction. 4C, multiple third struts 131 can be connected in series in a zigzag pattern via the third connecting portions 153, thereby increasing the number of zigzag folds. This increases the allowable amount of lateral displacement between the steam pipe 72 and the combustion liner 36.

[0066] (Regarding the thickness of the first strut 111 and the second strut 121) For example, as shown in FIG. 3A, in some embodiments of the support device 100, the first strut 111 and the second strut 121 may have a uniform thickness along their entire length, except for the connection portions with the mating components at both ends. 3B, in some embodiments of the support device 100, the first strut 111 may be thicker in the region from the first base end 112 to a certain axial position than in the region from that axial position to the first tip end 113. This increases the natural frequency of the support device 100 itself, thereby avoiding resonance and preventing damage or malfunction of the support device 100.

[0067] 3B, the second strut 121 may be thicker in the region from the second base end 122 to a certain axial position than in the region from that axial position to the second tip end 123. This increases the natural frequency of the support device 100 itself, thereby avoiding resonance and preventing damage or malfunction of the support device 100.

[0068] (Method of manufacturing the support device 100) The support device 100 according to some of the embodiments described above can be obtained, for example, by welding together the components that make up the first strut 111, the second strut 121, and the connecting portion 150. Furthermore, the support device 100 according to some of the embodiments can be obtained by integrally forming them using additive manufacturing, for example. That is, in support device 100 according to some embodiments, at least one first strut 111, at least one second strut 121, and connecting portion 150 may be integrally molded by additive manufacturing. This makes it possible to obtain the support device 100 relatively easily even if the support device 100 has a relatively complicated shape. Whether or not the support device 100 according to some embodiments is formed by additive manufacturing can be determined by looking at a cross section of the support device 100, for example.

[0069] A manufacturing method of a support device 100 according to some embodiments is a manufacturing method of a support device 100 for supporting a combustion liner 36 as a second member having a cylindrical body 39 as a second wall facing a steam pipe 72 as a first member having a pipe wall 73 as a first wall. In some embodiments, a manufacturing method for the support device 100 is a manufacturing method in which a connecting portion 150 having at least one first strut 111, at least one second strut 121, and at least one third strut 131 is integrally formed by additive manufacturing. This allows the support device 100 to be manufactured relatively easily even if the support device 100 has a relatively complicated shape.

[0070] When the support device 100 according to some embodiments is integrally formed by additive manufacturing, it is preferable to form the support device 100 by sequentially stacking the fabrication layers along the central axis Ax. In other words, when the support device 100 according to some embodiments is integrally formed by additive manufacturing, it is preferable to set the stacking direction to the same direction as the axial direction of the central axis Ax. When the support device 100 according to some embodiments is integrally formed by additive manufacturing, it is advisable to provide an inclined surface in a portion that will become an overhang region during manufacturing.

[0071] The present disclosure is not limited to the above-described embodiments, but also includes modifications to the above-described embodiments and appropriate combinations of these modifications. For example, the support device 100 according to some of the above-described embodiments is a support device that supports the steam pipe 72 as a first member and the combustion liner 36 as a second member while allowing relative movement between them, but the first member and the second member are not limited to the steam pipe 72 and the combustion liner 36. For example, either the first member or the second member may be a member arranged to the side of the combustion liner 36, such as a pipe for circulating cooling steam, and the other may be the combustion liner 36.

[0072] The contents described in each of the above embodiments can be understood, for example, as follows. (1) A support device 100 according to at least one embodiment of the present disclosure is a support device 100 for supporting a second member (combustion liner 36 or steam liner 72) having a second wall (tube wall 39 or tube wall 73) facing the first wall (tube wall 73 or tube body 39) relative to a first member (steam piping 72 or combustion liner 36) having a first wall (tube wall 73 or tube body 39). The support device 100 according to at least one embodiment of the present disclosure has a first base end 112 connected to the first wall (tube wall 73 or tube body 39) and a first tip end 113 that is the end opposite to the first base end 112, and is equipped with at least one first strut 111 extending from the first base end 112 to the first tip end 113 toward the second wall (tube body 39 or tube wall 73). The support device 100 according to at least one embodiment of the present disclosure has a second base end 122 connected to the second wall (tube 39 or pipe wall 73) and a second tip end 123 at the end opposite the second base end 122 and located closer to the first wall (pipe wall 73 or pipe 39) than the first tip end 113, and is provided with at least one second strut 121 extending from the second base end 122 to the second tip end 123, passing through the first tip end 113 and toward the first wall (pipe wall 73 or pipe 39). A support device 100 according to at least one embodiment of the present disclosure has at least one third strut 131 extending along the extension direction in a position range between the first tip 113 and the second tip 123 in the extension direction of the first strut 111 and the second strut 121, and is provided with a connecting portion 150 connecting the first tip 113 of the first strut 111 and the second tip 123 of the second strut 121.

[0073] According to the configuration (1) above, while ensuring the support strength to support each other, it is possible to absorb displacement between the first member (the steam pipe 72 or the combustion tube 36) and the second member (the combustion tube 36 or the steam pipe 72) in a direction intersecting the extension direction of the first strut 111 and the second strut 121.

[0074] (2) In some embodiments, in the configuration of (1) above, the connecting portion 150 may include a first connecting portion 151 to which first tip ends 113 of a plurality of first struts 111 are connected that are circumferentially arranged at a first radial position Pd1 around the central axis Ax that is aligned with the extension direction, and a second connecting portion 152 to which second tip ends 123 of a plurality of second struts 121 are connected that are circumferentially arranged at a second radial position Pd2 that is more inward than the first radial position Pd1. The first connecting portion 151 may be connected to the second connecting portion 152 via a third strut 131.

[0075] According to the configuration (2) above, the first strut 111, the third strut 131, and the second strut 121 are connected in a zigzag manner, so that displacement in the horizontal direction between the first member (steam pipe 72 or combustion liner 36) and the second member (combustion liner 36 or steam pipe 72), i.e., in a direction intersecting the extension direction of the first strut 111 and the second strut 121, can be permitted, while displacement in the vertical direction between the first member (steam pipe 72 or combustion liner 36) and the second member (combustion liner 36 or steam pipe 72), i.e., in the above-mentioned extension direction, can be made relatively small.

[0076] (3) In some embodiments, in the configuration of (2) above, first connecting portion 151 may be an annular connecting portion having first openings 151a through which multiple second struts 121 can pass.

[0077] According to the above configuration (3), each second strut 121 that passes through the first tip portion 113 and extends toward the first wall (pipe wall 73 or cylindrical body 39) to the second base end portion 122 passes through the first opening 151a of the first connecting portion 151 to which multiple first tip portions 113 are connected, thereby preventing interference between the second strut 121 and the first connecting portion 151. Furthermore, according to the configuration (3) above, the provision of the first opening 151a can reduce the weight of the first connecting portion 151 and increase the natural frequency of the support device 100 itself, thereby avoiding resonance and preventing damage or functional failure of the support device 100.

[0078] (4) In some embodiments, in the configuration of (2) or (3) above, the second connecting portion 152 may be an annular connecting portion having a second opening 152a.

[0079] According to the configuration (4) above, by providing the second opening 152a, the weight of the second connecting portion 152 can be reduced and the natural frequency of the support device 100 itself can be increased, thereby avoiding resonance and preventing damage or functional failure of the support device 100.

[0080] (5) In some embodiments, in the configuration of (1) above, the third strut 131 of the connecting portion 150 may have one end 132 connected to the first tip portion 113 and the other end 133 connected to the second tip portion 123 at a position closer to the first wall (pipe wall 73 or cylindrical body 39) than the one end 132.

[0081] According to the configuration (5) above, lateral displacement between the first member (the steam pipe 72 or the combustion liner 36) and the second member (the combustion liner 36 or the steam pipe 72) can be absorbed with a relatively simple configuration. Furthermore, according to the configuration (5) above, the one end 132 and the other end 133, which are both ends of the third strut 131, are connected to the first tip portion 113 of the first strut 111 and the second tip portion 123 of the second strut 121, so that the size and weight of these connecting parts can be reduced. This makes it possible to increase the natural frequency of the support device 100 itself, thereby avoiding resonance and preventing damage or functional failure of the support device 100.

[0082] (6) In some embodiments, in any of the configurations (2) to (4) above, the connecting portion 150 may include a plurality of third struts 131.

[0083] According to the configuration (6) above, the first strut 111, the third strut 131, and the second strut 121 are connected in a zigzag manner, so that even if the distance between the first member (steam pipe 72 or combustion liner 36) and the second member (combustion liner 36 or steam pipe 72) is short, displacement in the horizontal direction between the first member (steam pipe 72 or combustion liner 36) and the second member (combustion liner 36 or steam pipe 72), i.e., in a direction intersecting the extension direction of the first strut 111 and the second strut 121, can be permitted, while displacement in the vertical direction between the first member (steam pipe 72 or combustion liner 36) and the second member (combustion liner 36 or steam pipe 72), i.e., in the above-mentioned extension direction, can be suppressed.

[0084] (7) In some embodiments, in the configuration of (6) above, the plurality of third struts 131 may have one end 132 connected to the first connecting portion 151 and the other end 133 connected to the second connecting portion 152 at a position closer to the first wall (pipe wall 73 or cylindrical body 39) than the one end 132. The plurality of third struts 131 may be inclined with respect to the central axis Ax so that the size of the second connecting portion 152 is reduced.

[0085] According to the configuration (7) above, the size and weight of the second connecting portion 152 can be reduced, and the natural frequency of the support device 100 itself can be increased, thereby avoiding resonance and preventing damage and functional failure of the support device 100.

[0086] (8) In some embodiments, in the configuration of (7) above, each of the second tip portions 123 of the multiple second struts 121 and each of the other ends 133 of the multiple third struts 131 may be arranged alternately in the circumferential direction at the same radial position in the second connecting portion 152.

[0087] According to the configuration (8) above, the size and weight of the second connecting portion 152 can be reduced, and the natural frequency of the support device 100 itself can be increased, thereby avoiding resonance and preventing damage and functional failure of the support device 100.

[0088] (9) In some embodiments, in the configurations (7) or (8) above, each of the first tip portions 113 of the multiple first struts 111 and each of the one ends 132 of the multiple third struts 131 may be arranged alternately in the circumferential direction at the same radial position in the first connecting portion 151.

[0089] According to the configuration (9) above, the size and weight of the first connecting portion 151 can be reduced, and the natural frequency of the support device 100 itself can be increased, thereby avoiding resonance and preventing damage and functional failure of the support device 100.

[0090] (10) In some embodiments, the configuration of (2) above may include a third connecting portion 153 to which the ends of the multiple third struts 131 are connected. Of the multiple third struts 131, two third struts 131 that are adjacent in the radial direction about the central axis Ax may be connected via the third connecting portion 153 at one end (one end 132, the other end 133) of the third struts 131 or at the other end (one end 132, the other end 133) of the third struts 131.

[0091] According to the configuration (10) above, the third struts 131 can be connected in series in a zigzag manner via the third connecting portions 153, thereby increasing the number of zigzag folds. This increases the allowable amount of lateral displacement between the first member (the steam pipe 72 or the combustion liner 36) and the second member (the combustion liner 36 or the steam pipe 72).

[0092] (11) In some embodiments, in the configuration of (9) above, the plurality of first struts 111, the plurality of second struts 121, and the plurality of third struts 131 may be arranged in a circumferential direction centered on the central axis Ax along the extension direction, in groups of three or more.

[0093] According to the configuration (11) above, it is possible to prevent the rigidity of the support device 100 from decreasing in a specific lateral direction when the first member (steam piping 72 or combustion tube 36) and the second member (combustion tube 36 or steam piping 72) are displaced in the lateral direction.

[0094] (12) In some embodiments, the configuration of (11) above may include a first end plate 101 to which first base ends 112 of a plurality of first struts 111 are connected. The first base ends 112 may be connected to the first wall (pipe wall 73 or cylindrical body 39) via the first end plate 101.

[0095] According to the configuration (12) above, it is easier to connect the support device 100 to the first wall (pipe wall 73 or cylindrical body 39) compared to when each of the first base ends 112 of the multiple first struts 111 is directly connected to the first wall (pipe wall 73 or cylindrical body 39).

[0096] (13) In some embodiments, the configuration of (12) above may include a second end plate 102 to which second base ends 122 of a plurality of second struts 121 are connected. The second base ends 122 may be connected to the second wall (the cylindrical body 39 or the pipe wall 73) via the second end plate 102.

[0097] According to the configuration (13) above, it is easier to connect the support device 100 to the second wall (cylindrical body 39 or pipe wall 73) compared to when each of the second base ends 122 of the multiple second struts 121 is directly connected to the second wall (cylindrical body 39 or pipe wall 73).

[0098] (14) In some embodiments, in the configuration of (13) above, at least one first strut 111, at least one second strut 121, and the connecting portion 150 may be integrally molded by additive manufacturing.

[0099] According to the above configuration (14), even if the support device 100 has a relatively complicated shape, the support device 100 can be obtained relatively easily.

[0100] (15) A manufacturing method of a support device 100 according to at least one embodiment of the present disclosure is a manufacturing method of a support device 100 for supporting a second member (combustion liner 36 or steam liner 72) having a second wall (cylindrical body 39 or pipe wall 73) facing a first member (steam liner 72 or combustion liner 36) having a first wall (pipe wall 73 or pipe wall 73). The manufacturing method of a support device 100 according to at least one embodiment of the present disclosure integrally forms at least one first strut 111, at least one second strut 121, and a connecting portion 150 by additive manufacturing. Here, at least one first strut 111 has a first base end 112 connected to the first wall (pipe wall 73 or tubular body 39) and a first distal end 113 which is the end opposite the first base end 112, and extends from the first base end 112 to the first distal end 113 toward the second wall (tubular body 39 or pipe wall 73). At least one second strut 121 has a second base end 122 connected to the second wall (tubular body 39 or pipe wall 73) and a second distal end 123 which is the end opposite the second base end 122 and is located closer to the first wall (pipe wall 73 or pipe wall 39) than the first distal end 113, and extends from the second base end 122 to the second distal end 123, passing through the first distal end 113, toward the first wall (pipe wall 73 or pipe wall 39). The connecting portion 150 has at least one third strut 131 extending along the extension direction in a position range between the first tip portion 113 and the second tip portion 123 in the extension direction of the first strut 111 and the second strut 121, and connects the first tip portion 113 of the first strut 111 and the second tip portion 123 of the second strut 121.

[0101] According to the method (15) above, even if the support device 100 has a relatively complicated shape, the support device 100 can be manufactured relatively easily. [Explanation of symbols]

[0102] 1. Gas turbine 36 Combustion tube 39 Cylinder 72 Steam piping 73 Pipe wall 100 Support Devices 101 First end plate 102 Second end plate 111 First Strut 112 First proximal end 113 1st tip 121 Second Strut 122 Second proximal end 123rd 2 tip 131 3rd Strut 132 one end 133 other end 150 Connection section 151 1st connection part 151a 1st opening 152 2nd connection part 152a 2nd opening 153 3rd connection part

Claims

1. A support device for supporting a second member having a second wall facing a first member having a first wall, the support device comprising: at least one first strut having a first proximal end connected to the first wall and a first distal end opposite the first proximal end, the first strut extending from the first proximal end to the first distal end toward the second wall; at least one second strut having a second base end connected to the second wall and a second tip end opposite the second base end and positioned closer to the first wall than the first tip end, the second strut passing through the first tip end from the second base end to the second tip end toward the first wall; a connecting portion including at least one third strut extending along the extension direction in a positional range between the first tip end and the second tip end in the extension direction of the first strut and the second strut, the connecting portion connecting the first tip end of the first strut and the second tip end of the second strut, The connecting portion is a first connecting portion to which the first tip ends of the plurality of first struts are connected, the first struts being arranged in a circumferential direction at a first radial position around a central axis along the extension direction; a second coupling portion to which the second tip ends of the plurality of second struts arranged in the circumferential direction are connected at a second radial position that is more inward than the first radial position; and Including, The first connecting portion is connected to the second connecting portion via the third strut. Support equipment.

2. the first connecting portion is an annular connecting portion having first openings through which the plurality of second struts can pass. The support device of claim 1 .

3. The second connecting portion is an annular connecting portion having a second opening.

3. The support device according to claim 1 or 2.

4. The third strut of the connecting portion has one end connected to the first tip portion and the other end connected to the second tip portion at a position closer to the first wall than the one end. The support device of claim 1 .

5. The connecting portion includes a plurality of the third struts. The support device of claim 1 .

6. the third struts each have one end connected to the first connecting portion and the other end connected to the second connecting portion at a position closer to the first wall than the one end, The third struts are inclined with respect to a central axis along the extension direction so that the size of the second connecting portion is reduced. The support device according to claim 5 .

7. the second end portions of the second struts and the other ends of the third struts are alternately arranged in the circumferential direction at the same radial position in the second connecting portion, The support device of claim 6.

8. the first end portions of the first struts and the one ends of the third struts are alternately arranged in the circumferential direction at the same radial position in the first connecting portion, 8. A support device according to claim 6 or 7.

9. a third connecting portion to which the ends of the plurality of third struts are connected; Among the plurality of third struts, two third struts that are adjacent in a radial direction about a central axis along the extension direction are connected at one end or the other end via the third connecting portion. The support device of claim 1 .

10. The plurality of first struts, the plurality of second struts, and the plurality of third struts are arranged in a circumferential direction around a central axis along the extension direction, with three or more struts being arranged in the circumferential direction around the central axis. The support device of claim 8.

11. a first end plate to which the first base ends of the plurality of first struts are connected, the first struts being arranged in a circumferential direction around a central axis extending in the extension direction; Equipped with the first proximal end is connected to the first wall via the first end plate; The support device of claim 10.

12. a second end plate to which the second base ends of the plurality of second struts are connected, the second struts being arranged in a circumferential direction around a central axis extending in the extension direction; Equipped with The second proximal end is connected to the second wall via the second end plate. The support device of claim 11.

13. the at least one first strut, the at least one second strut, and the connecting portion are integrally molded by additive manufacturing. The support device of claim 12.

14. 1. A method for manufacturing a support device for supporting a second member having a second wall facing a first member having a first wall, the method comprising: The support device is at least one first strut having a first proximal end connected to the first wall and a first distal end opposite the first proximal end, the first strut extending from the first proximal end to the first distal end toward the second wall; at least one second strut having a second base end connected to the second wall and a second tip end opposite the second base end and positioned closer to the first wall than the first tip end, the second strut passing through the first tip end from the second base end to the second tip end toward the first wall; a connecting portion including at least one third strut extending along the extension direction of the first strut and the second strut in a positional range between the first tip end and the second tip end in the extension direction of the first strut and the second strut, the connecting portion connecting the first tip end of the first strut and the second tip end of the second strut; Equipped with The connecting portion is a first connecting portion to which the first tip ends of the plurality of first struts are connected, the first struts being arranged in a circumferential direction at a first radial position around a central axis along the extension direction; a second coupling portion to which the second tip ends of the plurality of second struts arranged in the circumferential direction are connected at a second radial position that is more inward than the first radial position; and Including, the first connecting portion is connected to the second connecting portion via the third strut, The plurality of first struts, the plurality of second struts, and the connecting portion are integrally formed by additive manufacturing. A method for manufacturing a support device.

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