(19)
(11) EP 2 236 754 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
08.01.2014 Bulletin 2014/02

(43) Date of publication A2:
06.10.2010 Bulletin 2010/40

(21) Application number: 10153973.2

(22) Date of filing: 18.02.2010
(51) International Patent Classification (IPC): 
F01D 5/22(2006.01)
 F01D 5/14(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
Designated Extension States:
AL BA RS

(30) Priority: 16.03.2009 JP 2009062229

(71) Applicant: Hitachi Ltd.
Tokyo 100-8280 (JP)

(72) Inventors:
  • Ono, Hideki
    Tokyo 100-8220 (JP)
  • Mizumi, Shunsuke
    Tokyo 100-8220 (JP)
  • Murata, Kenichi
    Tokyo 100-8220 (JP)

(74) Representative: MERH-IP Matias Erny Reichl Hoffmann 
Paul-Heyse-Strasse 29
80336 München
80336 München (DE)

   


(54) Steam turbine rotor blade and corresponding steam turbine


(57) In a steam turbine including a turbine rotor (7); a moving blade (1) secured to the turbine rotor (7); a shroud (3) provided on an outer circumferential side distal end of the moving blade (1); and an outer circumferential side stationary wall (4) internally embracing the turbine rotor (7) and forming an outer circumferential side passage wall of a steam path, the shroud (3) has an inner circumferential surface (14) so formed that a moving blade outlet flare angle (α3) is greater than a moving blade inlet flare angle (α2); an angle (α1) formed between the outer circumferential side stationary wall (4) adjacently provided on the upstream side of the moving blade (1) and the turbine central axis (50) is generally equal to the moving blade inlet flare angle (α2); and an angle (α4) formed between the outer circumferential side stationary wall adjacently provided on the downstream side of the moving blade and the turbine central axis (50) and an turbine central axis (50) is generally equal to the moving blade outlet flare angle (α3).







Search report









Search report