Impeller containment system
AssigneePratt & Whitney Canada Corp.
InventorsClive Ebden, Reha Gomuc
Life of this patent
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Abstract
The present invention relates to an impeller containment system for containing the burst of an impeller or the burst of impeller fragments from an impeller hub. The containment system utilizes a catcher extending from a shroud plate adjacent the impeller, which engages with a snagger formed as a unitary part of the impeller. The catcher and snagger cooperate to restrain a burst impeller or impeller fragments to their shortest radial distance from their point of burst. The system also includes a shroud which circumferentially surrounds the impeller and a diffuser, which circumferentially surrounds the radial tip portions of the impeller.
Claims10
A containment apparatus for containing fragments of a rotating centrifugal impeller resulting from a burst impeller within a housing, the centrifugal impeller including an annular impeller hub mounted for rotation about a longitudinal axis of rotation, the centrifugal impeller having a first outer radius from the axis of rotation, said impeller hub including an annular recessed portion defined in a downstream portion of the hub wherein the annular recessed portion has a second radius from the axis of rotation which is short relative to the first radius defining a radial groove, and containment means comprising an annular flange downstream of said impeller hub extending circumferentially adjacent said hub, said annular flange intermeshing with said annular groove for containing at least part of said hub by engaging said annular groove of the hub.
Dependencies are inferred from the claim text.