(19)
(11) EP 2 246 524 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
18.10.2017 Bulletin 2017/42

(43) Date of publication A2:
03.11.2010 Bulletin 2010/44

(21) Application number: 10161505.2

(22) Date of filing: 29.04.2010
(51) International Patent Classification (IPC): 
F01D 1/02(2006.01)
F01D 11/14(2006.01)
 F01D 11/08(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

(30) Priority: 01.05.2009 JP 2009112332

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

(72) Inventors:
  • Narita, Kenjiro
    Tokyo 100-8220 (JP)
  • Yamazaki, Haruyuki
    Tokyo 100-8220 (JP)
  • Doi, Hiroyuki
    Tokyo 100-8220 (JP)
  • Kobayashi, Kei
    Tokyo 100-8220 (JP)
  • Toriya, Hajime
    Tokyo 100-8220 (JP)
  • Kudo, Takeshi
    Tokyo 100-8220 (JP)
  • Kojima, Yoshitaka
    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) Seal structure and control method therefor


(57) The invention discloses a seal structure and a control method therefor that can improve sealing performance between a rotating portion and a fixed portion, smoothly start up a steam turbine (2), and suppress the temperature rise of the rotating portion even if the rotating portion is continuously rotated for a long period of time.
A seal structure is configured such that seal fins (62) on a seal base-plate (61) side and corresponding breathable spacers (4b) on a rotor (2a) side are opposed to each other and breathable spacers (4a) on the seal base-plate (61) side and corresponding seal fins (2a1) on the rotor (2a) side are opposed to each other. The seal base-plate (61) is installed shiftably in a direction coming close to or moving away from the rotor (2a). If steam St has low pressure, the seal fins (62) and the corresponding breathable spacers (4b) are not in contact with each other and the seal fins (2a1) and the corresponding breathable spacers (4a) are not in contact with each other. If the steam St has high pressure, the seal fins (62) and the corresponding breathable spacers (4b) are in contact with each other and the seal fins (2a1) and the corresponding breathable spacers (4a) are in contact with each other.







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Search report