EP 2246524 A2 20101103 - Seal structure and control method therefor
Title (en)
Seal structure and control method therefor
Title (de)
Dichtsystem und Steuerverfahren dafür
Title (fr)
Structure de joint et son procédé de contrôle
Publication
Application
Priority
JP 2009112332 A 20090501
Abstract (en)
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.
IPC 8 full level
F01D 1/02 (2006.01); F01D 11/08 (2006.01)
CPC (source: EP US)
F01D 1/02 (2013.01 - EP US); F01D 11/08 (2013.01 - EP US); F01D 11/14 (2013.01 - EP); F05D 2240/55 (2013.01 - EP US)
Citation (applicant)
- JP 2002228013 A 20020814 - MITSUBISHI HEAVY IND LTD
- JP 2007016704 A 20070125 - MITSUBISHI HEAVY IND LTD
Designated contracting state (EPC)
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
DOCDB simple family (publication)
EP 2246524 A2 20101103; EP 2246524 A3 20171018; CN 101876259 A 20101103; JP 2010261351 A 20101118; JP 5411569 B2 20140212; US 2010278645 A1 20101104
DOCDB simple family (application)
EP 10161505 A 20100429; CN 201010171046 A 20100428; JP 2009112332 A 20090501; US 76924910 A 20100428