JP2011241806A - Split body, turbine split ring using the same, and gas turbine equipped with the turbine split ring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a split body using a ceramic composite material, which can reduce the cost of manufacturing, and having excellent mechanical characteristics, and to provide a turbine split ring using the division and a gas turbine equipped with the turbine split ring.SOLUTION: The split body is manufactured from a member in a simple shape such as a plate and a rod. That is, the split body comprises a plate member 2 having a hole 5 formed therein, a rod member 3 having a fitting portion which corresponds to the hole 5 at a middle position in the longitudinal direction and is fitted, and a penetrating member 4 penetrating perpendicular to the longitudinal direction of the rod member 3. Movement of the rod member 3 inserted into the hole 5 in the insertion direction is restricted by the fitting portion, and movement of the rod member 3 in a direction opposite to the insertion direction is restricted by the penetrating member 4 which penetrates through the rod member 3 near the hole 5.

Description

  The present invention relates to a divided body, a turbine divided ring using the divided body, and a gas turbine including the same, and more particularly to a structure of the divided body.

  Generally, a power generation system is used in which the gas turbine efficiency is improved by increasing the gas turbine inlet temperature to improve the power generation efficiency. As the inlet temperature of the gas turbine rises, fiber reinforced ceramic composites with better heat resistance than metal materials are used in the turbine split ring of gas turbines that are installed around the rotor blades and exposed to high-temperature combustion gas. Research and development using materials (CMC: Ceramics Matrix Composite) is underway.

  The turbine split ring of the gas turbine is divided into a plurality of divided bodies in the circumferential direction, and each divided body is supported by a gas turbine casing. Each divided body is supported on the gas turbine casing by a hook portion protruding from the respective divided body main body toward the gas turbine casing (for example, Patent Document 1 to Patent Document 4).

JP 2004-36443 A Japanese Patent No. 4383060 JP 2006-105129 A Japanese Patent No. 2579854

  However, in the inventions described in Patent Document 1 to Patent Document 3, the woven fiber of the ceramic composite material is processed into a predetermined shape to form a matrix, and a divided body is manufactured. It is necessary to perform machining. Therefore, there is a problem that the cost of machining and a part of the expensive ceramic composite material are discarded by processing, so that the material cost increases and the manufacturing cost of the divided body increases.

  In recent years, a technique has been proposed in which ceramic fibers are made into a woven fabric and the fiber laminate is hot-pressed at a high temperature to synthesize a ceramic composite material (Patent Document 4). In the case of manufacturing a predetermined-shaped divided body from a ceramic composite material synthesized by such a method, there is a problem that it is particularly expensive because a member is cut out from a hard and thick plate-like ceramic. Furthermore, when a ceramic composite material is synthesized by hot pressing, the interlayer strength of the fiber laminate is small, so that a structure in which tensile stress is applied between the layers cannot be taken, and there is a problem that it is difficult to apply to a complex shape product.

  Further, when machining is performed to form the hook portion, the fiber direction of the ceramic composite material is cut off, so that there is a problem that the mechanical characteristics of the divided body are deteriorated.

  The present invention has been made in view of such circumstances, and a ceramic composite material can be used to reduce the manufacturing cost, and a divided body having excellent mechanical characteristics, and a turbine using the same It aims at providing a split ring and a gas turbine provided with the same.

In order to solve the above-described problems, the divided body of the present invention, the turbine divided ring using the divided body, and the gas turbine including the same employ the following means.
That is, according to the divided body according to the present invention, a plate-like member provided with holes, a rod-like member having a fitting portion fitted in correspondence with the hole at an intermediate position in the longitudinal direction, and the length of the rod-like member A penetrating member penetrating at right angles to the direction, restricting movement of the rod-shaped member inserted into the hole by the fitting portion in the insertion direction, and penetrating the rod-shaped member in the vicinity of the hole. When the member penetrates, the movement to the opposite side with respect to the insertion direction of the rod-shaped member is restricted.

  Insert the rod-like member into the hole of the plate-like member, fit the fitting portion of the rod-like member and the hole of the plate-like member, and restrict the movement of the rod-like member inserted into the hole by the fitting portion in the insertion direction, It was decided to be a divided body in which movement of the bar-shaped member to the opposite side with respect to the insertion direction of the bar-shaped member was restricted by penetrating the bar-shaped member in the vicinity of the hole. Thereby, the raw material cost and processing cost of each member which comprise a division body using a simple-shaped member can be reduced. Therefore, the manufacturing cost of the divided body can be reduced.

  Furthermore, according to the divided body according to the present invention, the hole has a tapered shape, the fitting portion has a tapered shape corresponding to the hole, and the tapered end side of the rod-shaped member is inserted into the hole. The rod-shaped member is restricted from moving toward the tapered end side by the fitting portion and the tapered shape of the hole, and the penetrating member penetrates the tapered end side of the rod-shaped member, whereby the end-spreading end side of the rod-shaped member It is characterized by restricting movement to.

  The hole of the plate-like member is tapered, the fitting portion of the rod-like member fitted in correspondence with the hole is tapered, and the tapered end of the rod-like member is inserted into the hole. Therefore, it can be regulated that the rod-like member moves the hole of the plate-like member toward the tapered tapered end. Further, the penetrating member is penetrated to the tapered end side of the rod-shaped member. Therefore, it can control that a bar-shaped member moves to the taper-shaped end spreading end side. Therefore, the rod-shaped member inserted into the hole can be fixed to the plate-shaped member.

  Furthermore, according to the divided body according to the present invention, the hole is provided with an oblique angle with respect to the longitudinal direction of the plate-like member.

  The holes are provided so as to form an oblique angle with respect to the longitudinal direction of the plate-like member. Therefore, it can control that a rod-shaped member moves the hole of a plate-shaped member to the taper end side of a rod-shaped member. Therefore, the rod-shaped member inserted into the hole can be fixed to the plate-shaped member.

  Furthermore, according to the divided body according to the present invention, the plate-like member and the rod-like member are manufactured using a ceramic composite material.

  When a divided body is manufactured using a ceramic composite material synthesized by hot pressing, processing becomes difficult. In addition, when machining is performed to mold the divided body, the strength of the divided body decreases because the fibers of the ceramic composite material are cut.

  Therefore, a plate-like member and a rod-like member are each manufactured and assembled using a ceramic composite material. Thereby, machining can be minimized and the divided body can be manufactured using only each member having a simple shape. Therefore, a divided body having high mechanical characteristics can be manufactured at a low cost. In particular, when a ceramic composite material synthesized by hot pressing is used, a member in which the direction of the tensile stress and the laminated surface of the fibers are controlled to be nearly parallel can be produced. Mechanical properties are improved.

  Furthermore, according to the divided body according to the present invention. The penetrating member is manufactured using a ceramic composite material.

  In the case of using a ceramic composite material synthesized by hot pressing, delamination is suppressed and there is no problem in strength if a member is prepared so that the laminated surface of fibers is parallel to the longitudinal direction.

  Furthermore, according to the divided body according to the present invention, the filler is filled in the gap between the hole and the rod-shaped member and the gap between the rod-shaped member and the penetrating member penetrating the rod-shaped member after assembling the members. The heat treatment is performed after filling.

  After assembling each member of the divided body, the filler was filled in the gap between the hole and the rod-shaped member and the gap between the rod-shaped member and the penetrating member penetrating the rod-shaped member and heat-treated. Therefore, the gap between the hole and the rod-shaped member and the gap between the rod-shaped member and the penetrating member that penetrates the rod-shaped member can be filled. Therefore, it can be set as the division body without the gap by assembly.

  Furthermore, according to the divided body according to the present invention, by using the plate-shaped member, the rod-shaped member, and the penetrating member, it is manufactured by combining simple shapes such as a plate shape, a rod shape, and a columnar shape. To do.

  The divided body is configured by combining simple shapes such as a plate, a rod, and a column. Therefore, the material cost and processing cost of each member can be reduced. Therefore, the manufacturing cost of the divided body can be reduced.

  Further, according to the turbine split ring according to the present invention, the turbine split ring is molded into an annular shape using any one of the split bodies described above.

  The turbine split ring is manufactured using a split body that does not impair mechanical properties and can reduce manufacturing costs. Therefore, it is possible to improve the soundness of the turbine split ring and reduce the manufacturing cost.

  Furthermore, according to the gas turbine of the present invention, the turbine blade to which gas is guided, an annular turbine casing including the turbine blade, and the turbine blade described above provided between the turbine blade and the turbine casing. And a turbine split ring, wherein a tapered end of the rod-shaped member is connected to the turbine casing.

The gas turbine is provided with a turbine split ring that does not impair mechanical properties and can reduce manufacturing costs. Thereby, even if it is a case where high temperature gas is guide | induced to a turbine blade, the soundness of a gas turbine can be improved at low cost.
Moreover, when the turbine split ring manufactured with the heat-processed division body is used, it can prevent that gas leaks from the turbine blade side to the turbine casing side. Therefore, the turbine efficiency can be improved.

  Insert the rod-like member into the hole of the plate-like member, fit the fitting portion of the rod-like member and the hole of the plate-like member, and restrict the movement of the rod-like member inserted into the hole by the fitting portion in the insertion direction, It was decided to be a divided body in which movement of the bar-shaped member to the opposite side with respect to the insertion direction of the bar-shaped member was restricted by penetrating the bar-shaped member in the vicinity of the hole. Thereby, a division body can be comprised using a member of a simple shape, and material cost and processing cost can be reduced. Therefore, the manufacturing cost of the divided body can be reduced.

It is an assembly drawing of the division body which constitutes the turbine division ring concerning one embodiment of the present invention, (A) is the state before the assembly, and (B) is the state after the assembly. It is the modification of the division body which comprises the turbine division ring of this invention, (A) is the state before the assembly, (B) is the state after the assembly.

FIG. 1 shows an assembly diagram of a split body constituting a turbine split ring according to an embodiment of the present invention, (A) shows a state before assembly, and (B) shows a state after assembly. The state is shown.
A gas turbine (not shown) provided in a power plant includes a moving blade (not shown) through which high-temperature combustion gas (gas) is guided and a turbine provided on the outer peripheral side of the moving blade (turbine blade). It has a split ring (not shown), and a cylindrical turbine casing (not shown) containing a rotor blade and a turbine split ring. The turbine split ring is divided into a plurality of divided bodies 1 in the circumferential direction.

Each divided body 1 is connected to the turbine casing by a rod-like member 3 described later. The divided body 1 has a plate-like member 2, a rod-like member 3, and a penetrating member 4.
The plate-like member 2 has a rectangular shape having a gentle convex portion in the outer peripheral direction. The plate-like member 2 is formed of a ceramic composite material (CMC: Ceramics Matrix Composite) having excellent heat resistance. When using a ceramic composite material synthesized by hot pressing, the laminated surface of the fibers is substantially perpendicular to the thickness direction of the plate-like member 2.

  The plate-like member 2 is provided with a plurality of rod-like member holes 5 (four locations in FIG. 1A). Each rod-shaped member (hole) 5 is provided so as to form an oblique angle with respect to the longitudinal direction of the plate-shaped member 2. Each rod-shaped member 5 has a tapered shape in which the shape tapers from the lower surface direction (inner circumferential direction of the turbine split ring) to the upper surface direction (outer circumferential direction of the turbine split ring) of FIG. ing. Each of the rod-shaped members 5 is formed such that a cross-sectional shape parallel to the longitudinal direction of the plate-shaped member 2 is a parallelogram.

  The four rod-like member holes 5a, 5b, 5c, and 5d are provided with two rod-like member holes 5a and 5b in the longitudinal direction of the plate-like member 2, and in parallel therewith, the other two rod-like member holes 5c. 5d are provided. Two bar-like member holes 5 a and 5 b provided on the same axis in the longitudinal direction of the plate-like member 2, two opening holes opened on the lower surface of the plate-like member 2, and an opening on the upper surface of the plate-like member 2 The two opening holes are provided such that the distance between the two opening holes opened on the lower surface is shorter than the distance between the two opening holes opened on the upper surface.

  Four rod-shaped members 3 (only one is shown in FIG. 1A) are provided. The rod-shaped member 3 is a square member having a tapered shape that tapers toward the tip. The rod-shaped member 3 is formed so that a surface perpendicular to the longitudinal direction has a parallelogram shape. The rod-shaped member 3 has a fitting portion (not shown) that can be fitted in correspondence with the rod-shaped member hole 5 provided in the plate-shaped member 2 in the middle of the longitudinal direction. ing.

  The fitting portion corresponds to the long side of the parallelogram in the plane perpendicular to the longitudinal direction of the rod-shaped member hole 5 and the long side of the parallelogram in the plane parallel to the longitudinal direction of the plate-like member 2, The short sides of the parallelogram on the surface perpendicular to the longitudinal direction of the member hole 5 and the short sides of the parallelogram on the surface parallel to the longitudinal direction of the plate-like member 2 are fitted in correspondence. . Thereby, the rod-shaped member 3 inserted into the rod-shaped member hole 5 is restricted from moving from the lower surface of the plate-shaped member 2 to the upper surface direction (the tapered end side of the rod-shaped member 3).

  The rod-shaped member 3 is formed of a ceramic composite material (CMC: Ceramics Matrix Composite) having excellent heat resistance. When a ceramic composite material synthesized by hot pressing is used for the bar-shaped member 3, the fiber lamination surface is formed to be parallel to the longitudinal direction of the bar-shaped member 3.

  The bar-shaped member 3 has a penetrating member hole 6 extending in the longitudinal direction at a midway position in the longitudinal direction. The penetrating member hole 6 is provided on the upper surface side of the plate-like member 2 of the rod-like member 3 fixed in the rod-like member hole 5. Thereby, the movement of the bar-shaped member 3 inserted into the bar-shaped member hole 5 from the upper surface of the plate-shaped member 2 to the lower surface direction (the end of the bar-shaped member 3 extending toward the end) is restricted.

  The penetrating member 4 is a short rod-shaped member. The penetrating member 4 has a circular cross section perpendicular to the longitudinal direction. The diameter of the penetrating member 4 is substantially equal to the inner diameter of the penetrating member hole 6. The penetrating member 4 is formed of a ceramic composite material (CMC: Ceramics Matrix Composite) having excellent heat resistance. When a ceramic composite material synthesized by hot pressing is used for the penetrating member 4, the fiber lamination surface is formed so as to be parallel to the longitudinal direction of the penetrating member 4.

Next, the assembly procedure of the divided body 1 will be described.
The rod-like member 3 is inserted into the rod-like member hole 5 provided in the plate-like member 2. The rod-shaped member 3 has a tapered end side that passes through the rod-shaped member hole 5 obliquely from the lower surface to the upper surface of the plate-shaped member 2.

  The rod-shaped member 3 penetrating the rod-shaped member hole 5 is fitted with the fitting portion provided at a midway position in the longitudinal direction and the rod-shaped member hole 5. This restricts the movement of the rod-shaped member 3 inserted into the rod-shaped member hole 5 toward the tapered end of the rod-shaped member 3 in the insertion direction.

  The penetrating member 4 is inserted into the penetrating member hole 6 in the rod-shaped member 3 whose movement in the insertion direction is restricted by the fitting portion and the rod-shaped member hole 5. Thereby, it will be controlled that the rod-shaped member 3 moves to the end spread end of the rod-shaped member 3 which is an opposite side with respect to the insertion direction. Further, by combining the rod-shaped member 3 and the penetrating member 6 in this manner, the fiber directions of the rod-shaped member 3 and the penetrating member 6 can be changed. Thus, the divided body 1 can be manufactured by combining only simple shapes such as a plate shape, a rod shape, and a columnar shape.

SiO ₂ -based compound filler in the gap between the fitting part of the rod-shaped member 3 of the assembled divided body 1 and the hole 5 for the rod-shaped member, and the gap between the penetrating member 4 and the hole 6 for the penetrating member Is filled. The divided body 1 in which the gaps are filled with the filler is then subjected to heat treatment. By filling each gap with a filler and applying heat treatment, the gap between the bar-shaped member hole 5 and the bar-shaped member 3 of the divided body 1 and between the through-member hole 6 and the through-member 4 are separated. The gap can be filled.

Next, the assembly procedure of the turbine split ring using the divided body 1 after the heat treatment will be described.
The tapered ends of the four rod-shaped members 3 provided in the divided body 1 are each connected to the turbine casing. In this way, the rod-shaped members 3 of the plurality of divided bodies 1 are connected to the turbine casing, and a cylindrical turbine divided ring is formed between the turbine casing and the turbine blades.

As described above, according to the split body, the turbine split ring using the split body, and the gas turbine including the split ring, the following operational effects are achieved.
The rod-like member 3 is inserted into the rod-like member hole (hole) 5 of the plate-like member 2, the fitting portion of the rod-like member 3 is fitted into the rod-like member hole 5 of the plate-like member 2, and the rod-like member 3 is fitted with the fitting portion. The movement of the rod-shaped member 3 inserted in the member hole 5 in the insertion direction is restricted, and the penetration member 4 penetrates the rod-shaped member 3 in the vicinity of the rod-shaped member hole 5 so that the rod-shaped member 3 is inserted in the insertion direction. The divided body 1 that restricts movement to the opposite side is used. Thereby, the raw material cost and processing cost of each member 2, 3, and 4 which comprise the division body 1 using a simple-shaped member can be reduced. Therefore, the manufacturing cost of the divided body 1 can be reduced.

  The rod-like member hole 5 of the plate-like member 2 is tapered, the fitting portion of the rod-like member 3 fitted in correspondence with the rod-like member hole 5 is tapered, and the tapered end of the rod-like member 3 is for the rod-like member. It was decided to insert into the hole 5. Therefore, the rod-like member 3 can be restricted from moving the rod-like member hole 5 of the plate-like member 2 toward the tapered tapered end side. Further, the penetrating member 6 is penetrated to the tapered end side of the rod-shaped member 3. Therefore, it can control that rod-shaped member 3 moves to the taper-shaped end spread end. Therefore, the rod-like member 3 inserted into the rod-like member hole 5 can be fixed to the plate-like member 2.

  The rod-shaped member hole 5 is provided so as to form an oblique angle with respect to the longitudinal direction of the plate-shaped member 2. Therefore, the rod-like member 3 can be restricted from moving the rod-like member hole 5 of the plate-like member 2 toward the tapered end side of the rod-like member 3. Therefore, the rod-like member 3 inserted into the rod-like member hole 5 can be fixed to the plate-like member 2.

The plate-like member 2, the rod-like member 3 and the penetrating member 4 were each manufactured and assembled using a ceramic composite material. Thereby, machining can be minimized and the divided body 1 can be manufactured by using the members 2, 3, and 4 having a simple shape. Therefore, the divided body 1 having high mechanical characteristics can be manufactured at low cost.
In particular, when using a ceramic composite material synthesized by hot pressing, the members 2, 3, and 4 in which the direction of the tensile stress and the laminated surface of the fibers are controlled to be nearly parallel can be produced. Peeling is suppressed and mechanical properties are improved.

The penetrating member 4 is made of a ceramic composite material. Thereby, the fiber direction of the penetrating member 4 is made uniform in the longitudinal direction, the divided body 1 is integrally processed, and the strength of the penetrating member 4 is increased compared to the case where the penetrating member 4 is cut out from the rod-shaped member 3. be able to. Therefore, breakage of the penetrating member 4 when the penetrating member 4 is penetrated through the rod-shaped member 3 can be prevented. Therefore, the strength of the divided body 1 can be increased.
In the case of using a ceramic composite material synthesized by hot pressing, if the members 2, 3, and 4 are prepared so that the laminated surface of the fibers is parallel to the longitudinal direction, delamination is suppressed and there is a problem in strength. Absent.

  After assembling the members 2, 3, 4 of the divided body 1, the filler is used as a gap between the rod-shaped member hole 5 and the rod-shaped member 3, and the through-member hole 6 provided in the rod-shaped member 3 and the rod-shaped member 3. The space between the penetrating member 4 and the penetrating member 4 is filled and the divided body 1 is heat treated. Therefore, the gap between the rod-shaped member hole 5 and the rod-shaped member 3 and the gap between the penetrating member hole 6 and the penetrating member 4 can be filled. Therefore, it can be set as the division body 1 without the clearance gap by an assembly.

  The divided body 1 is configured by combining members 2, 3, and 4 such as plate shapes, rod shapes, and columnar shapes that are simple shapes. Therefore, the material cost and processing cost of each member 2, 3, and 4 can be reduced. Therefore, the manufacturing cost of the divided body 1 can be reduced.

  The turbine split ring is manufactured using the split body 1 that does not impair the mechanical characteristics and can reduce the manufacturing cost. Therefore, it is possible to improve the soundness of the turbine split ring and reduce the manufacturing cost.

  The gas turbine is provided with a turbine split ring that does not impair mechanical properties and can reduce manufacturing costs. Thereby, even if it is a case where high temperature combustion gas (gas) is guide | induced to (moving blade turbine blade), the soundness of a gas turbine can be improved at low cost.

  Moreover, the turbine split ring manufactured by the heat-treated divided body 1 was used. Therefore, it is possible to prevent the combustion gas from leaking from the turbine blade side to the turbine casing side. Therefore, the turbine efficiency can be improved.

  In addition, although this embodiment demonstrated as the division | segmentation body 1 which comprises the turbine division ring of the gas turbine used for a power plant, this invention is not limited to this, The lining of a combustor, an inner cylinder, etc. May also be used.

  Further, the rod-like member 3 has been described on the assumption that the tapered end thereof is connected to the turbine casing. However, the rod-like member 3 that has a short overall length and does not reach the turbine casing is additionally provided on the plurality of plate-like members 2. Also good. In this case, since the rod-like member 3 having a short overall length protrudes toward the upper surface side of the plate-like member 2, the flow of the cooling medium introduced between the turbine split ring and the turbine blade can be agitated. Therefore, the cooling efficiency is increased by the heat transfer promotion.

  In the present embodiment, four rod-shaped members 3 are described. However, the present invention is not limited to this, and for example, two rod-shaped members 3 may be used as shown in FIG.

FIG. 2 shows an assembly drawing of a split body constituting a turbine split ring according to a modification of the present invention, (A) shows a state before assembly, and (B) shows a state after assembly. Has been.
Two rod-like members 7 (only one is shown in FIG. 2A) are provided. The rod-shaped member 7 is a square member having a tapered shape that tapers toward the tip. The rod-shaped member 7 is formed so that a surface perpendicular to the longitudinal direction has a parallelogram shape. The rod-shaped member 7 is fitted in a fitting portion (not shown) that can be fitted to a rod-shaped member hole (hole) 8 provided in the plate-shaped member 2 at an intermediate position in the longitudinal direction. have.

  The plate-like member 2 is provided with two rod-like member holes 8. Each rod-like member hole 8 is provided so as to form an oblique angle with respect to the longitudinal direction of the plate-like member 2. Each of the rod-like member holes 8 has a tapered shape that tapers from the lower surface direction of the plate-like member 2 toward the outer surface direction. Each hole 8 for rod-shaped members is formed so that the shape in the surface parallel to the longitudinal direction of the plate-shaped member 2 becomes a parallelogram shape.

DESCRIPTION OF SYMBOLS 1 Divided body 2 Plate-shaped member 3 Bar-shaped member 4 Penetrating member 5 Bar-shaped member hole (hole)

Claims (8)

A plate-like member provided with a hole;
A rod-like member having a fitting portion fitted in correspondence with the hole at an intermediate position in the longitudinal direction;
A penetrating member penetrating perpendicularly to the longitudinal direction of the rod-shaped member,
The movement of the rod-shaped member inserted into the hole by the fitting portion is restricted and the penetrating member penetrates the rod-shaped member in the vicinity of the hole to oppose the insertion direction of the rod-shaped member. A split body that regulates movement to the side. The hole has a tapered shape;
The fitting portion has a tapered shape corresponding to the hole,
The tapered end side of the rod-shaped member is inserted into the hole, and the movement of the rod-shaped member toward the tapered end side is regulated by the fitting portion and the tapered shape of the hole, and the penetrating end side of the rod-shaped member is placed on the tapered member side. The divided body according to claim 1, wherein movement of the rod-shaped member toward the end-spreading end side is regulated by penetrating the rod.   The divided body according to claim 1, wherein the hole is provided with an oblique angle with respect to a longitudinal direction of the plate-like member.   The said plate-shaped member, the said rod-shaped member, and the said penetration member are the division bodies in any one of Claims 1-3 manufactured using a ceramics composite material.   The heat treatment is performed by filling the gap between the hole and the rod-shaped member and the gap between the rod-shaped member and the penetrating member penetrating the rod-shaped member after assembling the members. Item 5. The divided body according to any one of Items 4.   The divided body according to any one of claims 1 to 5, which is manufactured by combining simple shapes such as a plate shape, a rod shape, and a columnar shape by using the plate-like member, the rod-like member, and the penetrating member.   A turbine split ring formed into an annular shape using the split body according to any one of claims 1 to 6. Turbine blades through which gas is introduced;
An annular turbine casing containing the turbine blades;
A gas turbine comprising: the turbine split ring according to claim 7 provided between the turbine blade and the turbine casing, wherein a tapered end of the rod-shaped member is connected to the turbine casing.

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