EP 2224096 A1 20100901 - Steam turbine and method for extracting moisture from a steam turbine
Title (en)
Steam turbine and method for extracting moisture from a steam turbine
Title (de)
Dampfturbine und Verfahren zur Extraktion von Feuchtigkeit aus einer Dampfturbine
Title (fr)
Turbine à vapeur et procédé pour extraire de l'humidité d'une turbine à vapeur
Publication
Application
Priority
EP 09153874 A 20090227
Abstract (en)
The steam turbine comprises a casing (1) containing a plurality of expansion stages each comprising stator and rotor airfoils. Downstream of the stator airfoils of one or more expansion stages, the casing (1) comprises a slot (7) arranged to receive moisture that concentrates on an end wall (3) of the stator airfoils (2) and discharge it to the outside. Each end wall (3) has a side portion facing the slot (7) having a variable radial obstruction in a tangential direction, in order to define with the slot (7) a passage (10) through which the moisture may pass that is smaller or closed at the suction side (12) and larger at the pressure side (13) of the stator blades (4), to at least partially prevent the dry steam from entering the slot (7) at the suction side (12) of the blade (4). The present invention also relates to a method for extracting moisture from a steam turbine.
IPC 8 full level
F01D 5/14 (2006.01); F01D 25/32 (2006.01)
CPC (source: EP US)
F01D 5/143 (2013.01 - EP US); F01D 25/32 (2013.01 - EP US); F05D 2220/31 (2013.01 - EP US)
Citation (search report)
- [X] DE 1426836 A1 19690130 - MERZ & MCLELLAN SERVICE LTD
- [A] WO 9844240 A1 19981008 - SIEMENS AG [DE], et al
- [A] JP S5267404 A 19770603 - HITACHI LTD
- [A] GB 2079399 A 19820120 - MTU MUENCHEN GMBH [DE]
- [A] DE 10327977 A1 20050105 - ALSTOM TECHNOLOGY LTD BADEN [CH]
- [A] US 5112187 A 19920512 - DAVIDS JOSEPH [US], et al
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 TR
Designated extension state (EPC)
AL BA RS
DOCDB simple family (publication)
EP 2224096 A1 20100901; CN 101818660 A 20100901; DE 102010007985 A1 20100902; JP 2010203438 A 20100916; US 2010221095 A1 20100902
DOCDB simple family (application)
EP 09153874 A 20090227; CN 201010151618 A 20100226; DE 102010007985 A 20100215; JP 2010039512 A 20100225; US 71381810 A 20100226