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1. (WO2017179711) STEAM TURBINE ROTOR BLADE, STEAM TURBINE, AND METHOD FOR MANUFACTURING STEAM TURBINE ROTOR BLADE

Pub. No.:    WO/2017/179711    International Application No.:    PCT/JP2017/015325
Publication Date: Fri Oct 20 01:59:59 CEST 2017 International Filing Date: Sat Apr 15 01:59:59 CEST 2017
IPC: F01D 5/28
F01D 5/14
F01D 5/22
F01D 25/00
Applicants: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
三菱日立パワーシステムズ株式会社
Inventors: DANNO Shohei
檀野 将平
MARUYAMA Takashi
丸山 隆
MIYAJIMA Keiichiro
宮島 慶一郎
Title: STEAM TURBINE ROTOR BLADE, STEAM TURBINE, AND METHOD FOR MANUFACTURING STEAM TURBINE ROTOR BLADE
Abstract:
A steam turbine rotor blade equipped with an extension part (7) that is provided at the tip-end portion in the blade height direction of a blade main body (61) on which a front edge part (61a) is formed, and that extends from a negative-pressure surface (612) toward the front edge part (61a); and a transition region seal member that is formed of a harder material than the blade main body (61),and that is provided so as to cover at least a portion of the surface of the base-end side of the extension part (7) and, in the connecting portion of the extension part (7) and the negative-pressure surface (612), the front-edge-side transition region facing the front edge part (61a). The transition region seal member has a front seal section (81) the surface of which is flush with the surface of the blade main body (61), and a base end seal section (82) that is formed integrally with the front seal section (81), and the surface of which protrudes more than the base-end-side surface.