STATIONARY BLADE SEGMENT

• Main Authors: ISHIDA TOMOHIRO, YAGI NOBUYORI, HAGIWARA KANICHI, KUROSAKI HIKARU, FUJIMURA DAIGO
• Format: Patent
• Language: English; Japanese
• Published: 21.06.2022
• Subjects: BLASTING; ENGINE PLANTS IN GENERAL; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES; STEAM ENGINES; WEAPONS

To provide a stationary blade segment which can make compatible both the improvement of structural rigidity and weight reduction.SOLUTION: A stationary blade segment comprises a plurality of stationary blades extending in a radial direction with respect to an axial line, and aligned with intervals in a peripheral direction, and an outside shroud for supporting end parts of the plurality of stationary blades in the radial direction, and extending in a peripheral direction. The outside shroud has an outside shroud main body expanding in an axial line direction and the peripheral direction, and a seal part protruding to the outside in the radial direction from the outside shroud main body, and extending in the peripheral direction. The seal part has a pair of end part regions including end parts of both sides in the peripheral direction, and a center region located between the pair of end part regions, and at least one first thick part is formed in which a plate thickness is relatively small in the end part regions, and the plate thickness is relatively large in the center region.SELECTED DRAWING: Figure 2 【課題】構造強度の向上と軽量化とを両立させることが可能な静翼セグメントを提供する。【解決手段】静翼セグメントは、軸線に対する径方向に延びるとともに周方向に間隔をあけて配列された複数の静翼と、複数の静翼の径方向外側の端部を支持し、周方向に延びる外側シュラウドと、を備え、外側シュラウドは、軸線方向、及び周方向に広がる外側シュラウド本体と、外側シュラウド本体から径方向外側に突出するとともに周方向に延びるシール部と、を有し、シール部は、周方向両側の端部を含む一対の端部領域と、一対の端部領域の間に位置する中央領域と、を有し、端部領域では板厚が相対的に小さく、中央領域には板厚が相対的に大きい第一厚肉部が少なくとも１つ形成されている。【選択図】図２