Global Patent Index - EP 1840333 A1

EP 1840333 A1 2007-10-03 - Turbine blade with shroud portions

Title (en)

Turbine blade with shroud portions

Title (de)

Turbinenschaufel mit Deckbandteile

Title (fr)

Aube de turbine ayant des portions de bande de renforcement

Publication

EP 1840333 A1 (EN)

Application

EP 06112086 A

Priority

EP 06112086 A

Abstract (en)

Rotating turbine blades in a blade row for a gas turbine have shrouds with shroud portions (8 ss , 8 ps , 8' ss , 8' ps ) having different bending moments. The shroud portions with the smaller bending moment (8 ss ) have edges with radially outer parts (12) that protrudes in circumferential direction over radially inner parts (13) of the shroud portion (8' ps ) of the adjacent blade that has a greater bending moment. The protruding shroud edge limits creep deformation of the shroud portion with the greater bending moment. The measure thus limits hot gas ingestion and prolongs turbine blade lifetime.

IPC 8 full level (invention and additional information)

F01D 5/22 (2006.01)

CPC (invention and additional information)

F01D 5/225 (2013.01)

Citation (applicant)

Citation (search report)

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

Designated extension state (EPC)

AL BA HR MK YU

EPO simple patent family

EP 1840333 A1 20071003

INPADOC legal status


2008-10-15 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20080404

2008-07-24 [REG DE 8566] DESIGNATED COUNTRY DE NOT LONGER VALID

2008-06-11 [AKX] PAYMENT OF DESIGNATION FEES

2007-10-03 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

2007-10-03 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Countries: AL BA HR MK YU