EP 1882813 A3 20130904 - A mounting disc for turbine or compressor blades
Title (en)
A mounting disc for turbine or compressor blades
Title (de)
Montagescheibe für Turbinen- oder Verdichterschaufel
Title (fr)
Disque de montage pour des aubes de turbine ou compresseur
Publication
Application
Priority
GB 0614972 A 20060728
Abstract (en)
[origin: EP1882813A2] Mounting discs (20, 30, 40, 50) are used in gas turbine engines to present turbine or compressor blades. These discs (20, 30, 40, 50) incorporate a bore or cob end 31, 41, 51 which in turn previously had a flat end face surface. Such flat end face surfaces are weight efficient but can lead to reduced component life and a limitation with regard to rotational speed due to Von-Mises stresses. By providing a deviation (39, 49, 59, 69) in the end face from a flat aspect, a reduction in axial stress is achieved with a marginal increase in hoop stress but with a net result that there is a reduction in the general operational Von-Mises stresses and therefore improvement in disc life or potential rotation speed capacity or both.
IPC 8 full level
CPC (source: EP US)
F01D 5/02 (2013.01 - EP US); F01D 5/30 (2013.01 - EP US); F05D 2250/711 (2013.01 - EP US)
Citation (search report)
- [XI] US 5860789 A 19990119 - SEKIHARA MASARU [JP], et al
- [XI] EP 1512834 A2 20050309 - GEN ELECTRIC [US]
- [XP] EP 1801347 A2 20070627 - GEN ELECTRIC [US]
- [XP] EP 1801349 A1 20070627 - GEN ELECTRIC [US]
- [A] EP 0272966 A1 19880629 - SNECMA [FR]
- [A] EP 1503036 A2 20050202 - UNITED TECHNOLOGIES CORP [US]
- [XI] DEM'YANUSHKO I V ET AL: "OPTIMAL DESIGN OF ROTATING DISKS", RUSSIAN ENGINEERING RESEARCH, ALLERTON PRESS, NEW YORK, NY, US, vol. 16, no. 7, 1 January 1996 (1996-01-01), pages 7 - 13, XP000699743, ISSN: 1068-798X
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 MT NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK RS
DOCDB simple family (publication)
EP 1882813 A2 20080130; EP 1882813 A3 20130904; GB 0614972 D0 20060906; US 2008025843 A1 20080131
DOCDB simple family (application)
EP 07252734 A 20070707; GB 0614972 A 20060728; US 87887807 A 20070727