STEAM TURBINE EXHAUST HOOD AND STEAM TURBINE SYSTEM

• Main Authors: SUGISHITA HIDEAKI, KUWAMURA SACHIHIRO, NAKANISHI HIROSHI, NISHIKAWA TOYOJI, MATSUMOTO KAZUYUKI
• Format: Patent
• Language: English; Japanese
• Published: 19.09.2019
• 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 steam turbine exhaust hood capable of improving the steam turbine efficiency and capable of reducing the fluid loss in the exhaust hood, and a steam turbine system.SOLUTION: A steam turbine exhaust hood in that an exhaust air stream for introducing the steam which has passed through the last stage blade of the steam turbine to a condenser, and the exhaust air stream is settled on the inside, that comprises: a casing having an outer peripheral wall part formed on the outer peripheral side of the exhaust air stream; a bearing cone provided on the radially inside of the outer peripheral wall part; and at least one bypass flow passage that for sending part of the steam flowing through the exhaust air stream from high pressure side of the exhaust air stream to the low pressure side or the condenser that having a high-pressure side opening formed in the bearing cone, and a low-pressure side opening having a lower pressure of the steam facing the opening than the high-pressure side opening.SELECTED DRAWING: Figure 3 【課題】排気室内における流体損失を低減可能であり、蒸気タービンの効率を向上可能な蒸気タービンの排気室、および蒸気タービンシステムを提供する。【解決手段】蒸気タービンの排気室は、蒸気タービンの最終段動翼を通過した蒸気を復水器に導くための排気流路を内部に画定するものであって、排気流路の外周側に形成される外周壁部を含むケーシングと、外周壁部よりも径方向の内側に設けられるベアリングコーンと、排気流路を流れる蒸気の一部を、排気流路の高圧側から排気流路の低圧側又は復水器に流す少なくとも一つのバイパス流路であって、ベアリングコーンに形成される高圧側開口および高圧側開口よりも開口に面する前記蒸気の圧力が低い低圧側開口を含むバイパス流路と、を備える。【選択図】 図３