PASSIVE CLEARANCE CONTROL FOR A CENTRIFUGAL IMPELLER SHROUD

A centrifugal impeller shroud assembly (300) has a dynamically moveable impeller shroud (320) for encasing a rotatable centrifugal impeller (111) and resolving misalignment between the impeller shroud and the rotatable centrifugal impeller. The assembly comprises a static casing (371), an impeller s...

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Bibliographische Detailangaben
Hauptverfasser:	Acker, Jonathan, Whitlock, Mark, Cooper, Nathanael, Khamliche, Younes, Cummings, Cassandra, Aker, Grace, Nesteroff, Michael
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING ENGINE PLANTS IN GENERAL HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES NON-POSITIVE DISPLACEMENT PUMPS POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS STEAM ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	A centrifugal impeller shroud assembly (300) has a dynamically moveable impeller shroud (320) for encasing a rotatable centrifugal impeller (111) and resolving misalignment between the impeller shroud and the rotatable centrifugal impeller. The assembly comprises a static casing (371), an impeller shroud (320), a shroud arm (370), and a thermal member (360). The shroud arm is coupled between the casing and the impeller shroud. The thermal member is coupled to the impeller shroud and has a coefficient of thermal expansion (CTE) lower than the CTE of the shroud. The shroud arm comprises a flexible portion (372) configured to flex responsive to a differential pressure across the shroud arm.