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Title:
STATOR BLADE SEGMENT AND STEAM TURBINE PROVIDED WITH SAME
Document Type and Number:
WIPO Patent Application WO/2022/034783
Kind Code:
A1
Abstract:
This stator blade segment comprises a circumferentially extending outer blade ring, a stator blade extending radially inward from the outer blade ring, and a sealing member. The stator blade has a cavity that is formed in the interior of the blade and that communicates with the surface of the blade. The outer blade ring has a blade ring body and two blade ring protrusions. The two blade ring protrusions protrude radially outward from an anti-gas path surface of the blade ring body and face each other across a gap in an axial direction, and together with a casing, a drain recovery space is formed between the two blade ring protrusions. The blade ring body has a blade surface drain recovery passage that allows communication between the cavity and the drain recovery space. One of the two blade ring protrusions has a sealing surface. The sealing member is positioned between part of the casing and the sealing surface of the one blade ring protrusion, and the sealing member is in contact with the sealing surface.

Inventors:
SAKASHITA KENICHI (JP)
DANNO SHOUHEI (JP)
Application Number:
PCT/JP2021/027528
Publication Date:
February 17, 2022
Filing Date:
July 26, 2021
Export Citation:
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Assignee:
MITSUBISHI POWER LTD (JP)
MITSUBISHI HEAVY IND LTD (JP)
International Classes:
F01D9/02; F01D25/32
Foreign References:
JP2013122246A2013-06-20
JP2007154890A2007-06-21
JP2001289059A2001-10-19
JP2008196488A2008-08-28
JPH08200007A1996-08-06
JPS6445904A1989-02-20
JPS62190803U1987-12-04
JP2016511362A2016-04-14
JPH10299410A1998-11-10
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
Download PDF:
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