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Patent Searching and Data


Title:
STEAM TURBINE ROTOR BLADE, STEAM TURBINE, AND METHOD FOR MANUFACTURING STEAM TURBINE ROTOR BLADE
Document Type and Number:
WIPO Patent Application WO/2017/179711
Kind Code:
A1
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.

Inventors:
DANNO Shohei (3-1, Minatomirai 3-Chome, Nishi-ku, Yokohama-sh, Kanagawa 01, 〒2208401, JP)
MARUYAMA Takashi (3-1, Minatomirai 3-Chome, Nishi-ku, Yokohama-sh, Kanagawa 01, 〒2208401, JP)
MIYAJIMA Keiichiro (3-1, Minatomirai 3-Chome, Nishi-ku, Yokohama-sh, Kanagawa 01, 〒2208401, JP)
Application Number:
JP2017/015325
Publication Date:
October 19, 2017
Filing Date:
April 14, 2017
Export Citation:
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Assignee:
MITSUBISHI HITACHI POWER SYSTEMS, LTD. (3-1 Minatomirai 3-Chome, Nishi-ku Yokohama-sh, Kanagawa 01, 〒2208401, JP)
International Classes:
F01D5/28; F01D5/14; F01D5/22; F01D25/00
Foreign References:
JPS57148005A1982-09-13
JP2012504203A2012-02-16
JPS61201801A1986-09-06
JP2012077355A2012-04-19
JP2010065666A2010-03-25
Other References:
See also references of EP 3418497A4
Attorney, Agent or Firm:
MORI Ryuichirou et al. (1-9-2, Marunouchi Chiyoda-k, Tokyo 20, 〒1006620, JP)
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