EP 2551467 B1 20181010 - Gas turbine engine active clearance control system and corresponding method
Title (en)
Gas turbine engine active clearance control system and corresponding method
Title (de)
System zur aktiven Spaltkontrolle für Gasturbinentriebwerke und entsprechendes Verfahren
Title (fr)
Systèm de contrôle de jeu actif pour moteur à turbine à gaz et procédé associé
Publication
Application
Priority
US 201113190674 A 20110726
Abstract (en)
[origin: EP2551467A1] An active clearance control system (30) utilizes a working fluid stream to control radial thermal growth and thereby a clearance between turbine blades (46) and a corresponding shroud (48) of a gas turbine engine (10). Conduits (38) disposed about a turbine case (28) and proximate to pads (44) defined within the turbine case include a flow surface (60) parallel to the pads (44). The pads (44) are an area of increased thickness in the turbine case (28) that receives impingement flow from the conduits (38). Grooves (66) within the pads (44) further increase impingement cooling flow effectiveness. The increased thickness of the pads (44) provides the thermal mass desired to effect thermal expansion and contraction responsive to the cooling airflow. A method of actively controlling clearances within a gas turbine engine is also provided.
IPC 8 full level
F01D 11/24 (2006.01)
CPC (source: EP US)
F01D 11/24 (2013.01 - EP US); F05D 2260/201 (2013.01 - EP US); F05D 2260/2214 (2013.01 - EP US); F05D 2260/22141 (2013.01 - EP US)
Citation (examination)
- US 6612808 B2 20030902 - LEE CHING-PANG [US], et al
- US 4719748 A 19880119 - DAVIS JR LEWIS B [US], et al
- GB 2378730 A 20030219 - 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
DOCDB simple family (publication)
EP 2551467 A1 20130130; EP 2551467 B1 20181010; US 2013028705 A1 20130131
DOCDB simple family (application)
EP 12177516 A 20120723; US 201113190674 A 20110726