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US 7,001,155 B2Granted
Compressor impeller with stress riser
AssigneeHoneywell International Inc.
InventorsJose Cabrales, Gerald Duane LaRue, John M. Wilson, Angus Lemon
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AssigneeHoneywell International Inc.
InventorsJose Cabrales, Gerald Duane LaRue, John M. Wilson, Angus Lemon
Estimating the term…
A compressor impeller for use with a boreless turbocharger is provided in accordance with this invention. The compressor impeller comprises an integral hub projecting axially therefrom that includes a partial bore therein that extends from an open to a close bore end. The bore includes a threaded portion that is configured to accommodate threaded engagement with an end of a common shaft disposed through a turbocharger housing and attached at an opposite end to a turbine wheel. The hub is specially configured so that the threaded portion has a relatively increased wall thickness when compared to a remaining portion of the bore disposed between the threaded portion and the end of the bore. The bore is configured providing a section having a reduced wall thickness, between the threaded portion and the bore closed end, for purposes of providing a preferential stress relief mechanism. Configured in this manner, the compressor impeller operates to ensure that, in the event of a stress-related compressor impeller failure, the shaft will be contained in its proper placement within the turbocharger.
A compressor impeller for use within a turbocharger, the compressor impeller comprising a body having a number of blades projecting radially therefrom, and an integral hub projecting axially a distance away from the body, the hub having a bore that includes a threaded section to permit threaded engagement with a threaded shaft, the bore further comprising a closed end and a reduced wall thickness section positioned between the bore threaded section and the closed end, wherein the hub includes an outside surface having a reduced diameter section relative to the wall thickness of the threaded section positioned radially adjacent the reduced wall thickness section.
A turbocharger for internal combustion engines, the turbocharger comprising:
A compressor impeller for use within a turbocharger having a common shaft disposed through a center housing, and a turbine wheel attached to one end of the shaft and disposed within a turbine housing attached to the center housing, the compressor impeller being attached to an opposite end of the shaft and being disposed within a compressor housing attached to the center housing, the compressor impeller comprising an integral hub projecting axially therefrom towards the center housing, the hub including a bore extending partially therein from a bore open end to a closed end, the bore including a threaded portion for accommodating threaded attachment with the shaft, the threaded portion having a wall thickness that is greater than a portion of the bore positioned between the threaded portion and the closed end, the hub including a reduced diameter section relative to the wall thickness of the threaded section extending circumferentially around an outside surface of the hub axially positioned between the bore threaded portion and the bore closed end.
Dependencies are inferred from the claim text.