(19)
(11) EP 2 692 990 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
22.04.2015 Bulletin 2015/17

(43) Date of publication A2:
05.02.2014 Bulletin 2014/06

(21) Application number: 13178438.1

(22) Date of filing: 30.07.2013
(51) International Patent Classification (IPC): 
F01D 5/14(2006.01)
F01D 25/32(2006.01)
 F01D 5/28(2006.01)
(84) Designated Contracting States:
AL 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 RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 30.07.2012 JP 2012167902

(71) Applicant: Mitsubishi Hitachi Power Systems, Ltd.
Yokohama 220-8401 (JP)

(72) Inventors:
  • Nakano, Susumu
    Tokyo, 100-8280 (JP)
  • Mizumi, Shunsuke
    Tokyo, 100-8280 (JP)
  • Kudo, Takeshi
    Tokyo, 100-8280 (JP)
  • Sakakibara, Kazuya
    Tokyo, 100-8280 (JP)
  • Ishibashi, Koji
    Tokyo, 100-8280 (JP)
  • Matsuda, Masaki
    Tokyo, 100-8280 (JP)

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

   


(54) Steam turbine, and steam turbine stationary blade


(57) The present invention is a steam turbine comprising a turbine stage having a stationary blade (1) and a moving blade (2) provided on the downstream side of the stationary blade in a working fluid flow direction, wherein the stationary blade (1) is formed in a hollow blade shape by deformation processing a metal plate, and wherein a slit (24) to guide liquid droplets deposited on a blade wall surface to the inside of the blade is formed in the blade wall by overlaying an airfoil suction-side metal plate (20) and an airfoil pressure-side metal plate (21) with a gap therebetween in a blade tail part (8) of the stationary blade (1).







Search report









Search report