(19)
(11) EP 2 634 376 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
13.04.2016 Bulletin 2016/15

(43) Date of publication A2:
04.09.2013 Bulletin 2013/36

(21) Application number: 13157095.4

(22) Date of filing: 28.02.2013
(51) International Patent Classification (IPC): 
F01D 11/00(2006.01)
F01D 11/12(2006.01)
 F01D 11/02(2006.01)
F01D 25/04(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: 29.02.2012 JP 2012042693

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

(72) Inventors:
  • Endo, Akira
    Tokyo, 100-8220 (JP)
  • Yamaguchi, Kazuyuki
    Tokyo, 100-8220 (JP)
  • Magara, Yohei
    Tokyo, 100-8220 (JP)
  • Yoshida, Toyomi
    Tokyo, 100-8220 (JP)
  • Murata, Kenichi
    Tokyo, 100-8220 (JP)
  • Kudo, Takeshi
    Tokyo, 100-8220 (JP)

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

   


(54) Turbo-machinery sealing arrangement


(57) Turbo machinery includes a rotating body (2), a stator (3, 4, 5), and a labyrinth seal (11) disposed in a gap between the rotating body and the stator. The labyrinth seal (11) includes a first seal fin (12) and a second seal fin (14). The first seal fin (12) protrudes fromaportionof one of the rotating body and the stator, which is disposed on the high-pressure side of the center of the labyrinth seal in the axial direction of the rotating body, toward an opposing portion of the other one of the rotating body and the stator. The second seal fin (14) is disposed on the low-pressure side of the first seal fin to form a cavity (13) together with the first seal fin and protrude from a portion of one of the rotating body and the stator toward an opposing portion of the other one of the rotating body and the stator. A gap to the portion opposing the first seal fin (12) is smaller than a gap to the portion opposing the second seal fin (14).







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Search report