EP 1623097 A1 20060208 - STEAM/GAS TURBINE PRESSURE STAGE WITH UNIVERSAL SHROUD
Title (en)
STEAM/GAS TURBINE PRESSURE STAGE WITH UNIVERSAL SHROUD
Title (de)
DAMPF-/GASTURBINENDRUCKSTUFE MIT UNIVERSALDECKBAND
Title (fr)
ETAGE DE PRESSION D'UNE TURBINE A VAPEUR/GAZ PRESENTANT UN ANNEAU DE RENFORCEMENT UNIVERSEL
Publication
Application
Priority
US 0312102 W 20030418
Abstract (en)
[origin: WO2004099572A1] Imperfect design of shroudS (8) or identical parts of the blades (7) of steam/gas turbines, including the adjoining seals, leads to a decrease in reliability and efficiency. These drawbacks are eliminated by the use of drilled radial holes (12) in the shroud of the blades (7). The transfer of steam through the shroud holes (12) results in the relief of the pressures gradient on the surface of the shroud (8) and prevents the formation of metal oxide, salt and other deposits on the inner surfaces of the shroud (8). The quantity and diameter of the holes (12), as well as their corresponding disposition and the values of radial clearances in shroud crowning seals (4, 5) regulate their efficiency.
IPC 1-7
IPC 8 full level
F01D 5/18 (2006.01); F01D 5/14 (2006.01); F01D 5/22 (2006.01); F01D 11/08 (2006.01); F01D 25/00 (2006.01)
CPC (source: EP)
F01D 5/143 (2013.01); F01D 5/225 (2013.01); F01D 11/08 (2013.01); F01D 25/007 (2013.01); F05D 2220/31 (2013.01); F05D 2220/32 (2013.01); F05D 2260/602 (2013.01); F05D 2260/95 (2013.01); Y02T 50/60 (2013.01)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2004099572 A1 20041118; AU 2003228590 A1 20041126; AU 2003228590 B2 20100107; BR 0318261 A 20060523; CA 2562712 A1 20041118; CA 2562712 C 20110531; CN 100386502 C 20080507; CN 1788142 A 20060614; EA 008156 B1 20070427; EA 200501572 A1 20060825; EP 1623097 A1 20060208; EP 1623097 A4 20120627; HK 1092853 A1 20070216; JP 2006523792 A 20061019; JP 4195882 B2 20081217; UA 81314 C2 20071225
DOCDB simple family (application)
US 0312102 W 20030418; AU 2003228590 A 20030418; BR 0318261 A 20030418; CA 2562712 A 20030418; CN 03826639 A 20030418; EA 200501572 A 20030418; EP 03726350 A 20030418; HK 06113323 A 20061205; JP 2004571652 A 20030418; UA A200510908 A 20030418