EP 2554797 A2 20130206 - System and method for passively controlling clearance in a gas turbine engine
Title (en)
System and method for passively controlling clearance in a gas turbine engine
Title (de)
System und Verfahren zur passiven Steuerung des Abstands in einem Gasturbinenmotor
Title (fr)
Système et procédé permettant de commander passivement le jeu dans un moteur de turbine à gaz
Publication
Application
Priority
US 201113195273 A 20110801
Abstract (en)
A system for passively controlling clearance in a turbine engine (100) comprises a static assembly (160) arranged circumferentially about an engine rotor assembly (170) and defining a gap (150) between a tip end (112) of the rotor assembly (170) and an adjacent inner surface (132) of the static assembly (160). The static assembly includes a gap control member (130) that defines the inner surface (132), is exposed to the engine working fluid, and comprises a shape memory material selected and preconditioned to deform in a preselected manner in response to a temperature of the engine working fluid. Alternatively, airfoil blades of the rotor assembly include the gap control member (230). A method for passively controlling clearance in a turbine engine (100) comprises assembling the engine so as to define an initial set of build clearances, operating the engine to observe running clearances, configuring a gap control member (130) comprising a shape memory material and re-assembling the engine with the gap control member (130).
IPC 8 full level
F01D 11/18 (2006.01)
CPC (source: EP US)
F01D 11/18 (2013.01 - EP US); F05D 2300/505 (2013.01 - EP US)
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 2554797 A2 20130206; CN 102913290 A 20130206; US 2013034423 A1 20130207
DOCDB simple family (application)
EP 12177897 A 20120725; CN 201210272196 A 20120801; US 201113195273 A 20110801