EP 2703605 A3 20170614 - A gas turbine blade tip omprising a metallic foam material
Title (en)
A gas turbine blade tip omprising a metallic foam material
Title (de)
Eine Gasturbinenschaufelspitze welchen einen metallischer Schaumstoff beinhaltet
Title (fr)
Une aube de turbine à gaz comprenant un matériau en mousse métallique
Publication
Application
Priority
GB 201215299 A 20120829
Abstract (en)
[origin: EP2703605A2] Tip rub in gas turbine engines is a well-known phenomenon, and may lead to increased tip clearances, with consequent detrimental effects on the engine's performance and blade flutter margins. Heavy or repeated rubbing may cause blade tip over temperature leading to cracking and fatigue failure. The invention provides a tip for a gas turbine engine rotor blade, which under contact with the casing surface interacts with the casing surface so as to reduce the contact force and thereby reduce the energy transferred to the blade. The tip may be designed to ablate under contact with the casing surface, or to cut or abrade the casing surface, or to crush or compress of deflect under contact with the casing surface. In a preferred embodiment, the tip comprises fibre-reinforced metallic foam material.
IPC 8 full level
F01D 11/12 (2006.01); F01D 5/14 (2006.01); F01D 5/20 (2006.01); F01D 5/28 (2006.01); F01D 11/08 (2006.01)
CPC (source: EP US)
F01D 5/14 (2013.01 - EP US); F01D 5/20 (2013.01 - EP US); F01D 5/282 (2013.01 - EP US); F01D 11/08 (2013.01 - EP US); F01D 11/12 (2013.01 - EP US)
Citation (search report)
- [X] US 2006216154 A1 20060928 - MCMILLAN ALISON J [GB]
- [X] EP 2253803 A2 20101124 - ROLLS ROYCE PLC [GB]
- [X] US 2012063909 A1 20120315 - BOTTOME KRISTOFER J [GB]
- [X] US 6413051 B1 20020702 - CHOU CHEN-YU JACK [US], et al
- [A] US 7780420 B1 20100824 - MATHENY ALFRED P [US]
- [A] US 2010143097 A1 20100610 - READ SIMON [GB], et al
- [A] US 2012196146 A1 20120802 - RICE EDWARD CLAUDE [US]
- [A] EP 2253806 A2 20101124 - ROLLS ROYCE PLC [GB]
Designated contracting state (EPC)
AL 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 RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 2703605 A2 20140305; EP 2703605 A3 20170614; GB 201215299 D0 20121010; US 2014064964 A1 20140306
DOCDB simple family (application)
EP 13179761 A 20130808; GB 201215299 A 20120829; US 201313962354 A 20130808