JP-WO2025070405-A5 -

Dates

Publication Date

20260507

Application Date

20240924

Description

An wing as one embodiment of the invention for achieving the above objective comprises a flow channel forming plate and a wing body having an airfoil cross-section and extending in the wing height direction having a component perpendicular to the cross-section. The flow channel forming plate is provided at one end of the wing body in the wing height direction and extends in a direction perpendicular to the wing height direction. This is a schematic cross-sectional view of a gas turbine in one embodiment relating to this disclosure.This is a cross-sectional view of a main part of a gas turbine in one embodiment of the present disclosure.This is a perspective view of a stator wing in one embodiment relating to this disclosure.This is a cross-sectional view of a stationary blade along the camber line in one embodiment of the present disclosure.This is a cross-sectional view of the main part of a stator wing in one embodiment of the present disclosure.This is a cross-sectional view taken along the line VI-VI in Figure 4.This is a cross-sectional view taken along line VII-VII in Figure 4.This is a perspective view of the cutouts in the main part of the shroud relating to this disclosure.This is a perspective view of the key cutout at the rear end of the outer shroud body relating to this disclosure.This is an explanatory diagram for illustrating the surface shape of the second gas path definition surface and the second end definition surface in the rear end passage of the outer shroud relating to this disclosure.This is a perspective view of the key cutout at the rear end of the inner shroud body relating to this disclosure.This is an explanatory diagram for illustrating the surface shapes of the gas path definition surface and the end definition surface in the rear end passage of the inner shroud relating to this disclosure.This is a perspective view of the key cutout at the rear end of the inner shroud body of a modified example relating to this disclosure.This is an explanatory diagram for illustrating the surface shapes of the gas path definition surface and the end definition surface in the rear end passage of the inner shroud of a modified example relating to this disclosure. The inner shroud 60i, which is a flow path forming plate, has an inner shroud body 61i and a peripheral wall 65i, as shown in Figures 3, 4, and 7. The inner shroud body 61i has a gas path surface 64p facing outward Dr, an anti-gas path surface 64a facing inward Dr, a front end surface 62f which is the end surface of the upstream side Dau, a rear end surface 62b which is the end surface of the downstream side Dad, a ventral end surface 63p which is the end surface of the first side Dc1 in the circumferential direction, and a dorsal end surface 63n which is the end surface of the second side Dc2. The front end surface 62f and the rear end surface 62b are approximately parallel. Also, the ventral end surface 63p and the dorsal end surface 63n are approximately parallel. Therefore, when viewed from the radial direction Dr, the inner shroud body 61i has a parallelogram shape, as shown in Figure 7. The wing air passage cover 57, provided on the inner shroud 60i, is connected to the anti-gas path surface 64a of the inner shroud body 61i so as to be able to cover the opening at the end of the inner Dri of the second wing passage 72 and the opening at the end of the inner Dri of the third wing passage 73. As shown in Figures 4, 5, and 8, the sealing plate 58 divides the space within the recess 66 of the inner shroud 60i into an outer space on the inner Dri (anti-flow side) and a cooling air space 67 on the outer Dr (flow side). The impinge plate 59 divides this cooling air space 67 into a first space 67a on the inner Dri (anti-flow side) and a second space 67b on the outer Dr (flow side). The impinge plate 59 has a plurality of through holes 59a that penetrate in the radial direction Dr. Cooling air ACL in the first space 67a flows into the second space 67b through the plurality of through holes 59a of the impinge plate 59. At this time, the cooling air Acl that has passed through the multiple through holes 59a of the impinge plate 59 impinges and cools the anti-gas path surface 64a of the inner shroud body 61i. A cooling air exhaust line 45 is connected to the impinge plate 59. This cooling air exhaust line 45 extends from the impinge plate 59 to the inner Dri and passes through the sealing plate 58. The cooling air Acl that has flowed into the second space 67b and impinges and cools the anti-gas path surface 64a of the inner shroud body 61i is guided through this cooling air exhaust line 45, for example, into the intermediate casing 6. The end definition surface 92i is almost parallel to the outer anti-gas path surface 64a o of the inner shroud body 61i (see Figure 5). Therefore, the angle of the end definition surface 92i with respect to the gas path definition surface 91i is acute. In other words, the first corner portion 95 is formed at a