Turbocharger compressor wheel having a counterbore treated...

Details Turbocharger compressor wheel having a counterbore treated... Turbocharger compressor wheel having a counterbore treated...

2006-02-07

2006-02-07

Look, Edward K. (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Support mounting, carrier or fairing structure

C416S248000

Reexamination Certificate

active

06994526

ABSTRACT:
Compressor wheel and techniques for manufacturing such a wheel are provided. The wheel may include a hub with a counterbore internally treated to impart residual compressive stresses for enhanced endurance to stress-induced fatigue. The surface treatment allows extending the counterbore relatively closer to a plane of typical maximum stress of the wheel. This design flexibility advantageously allows avoiding or reducing overhang of the compressor wheel, thereby improving rotor dynamics and reducing the axial length of the hub, and the overall foot print of the compressor wheel.

REFERENCES:
patent: 3961867 (1976-06-01), Woollenweber
patent: 4705463 (1987-11-01), Joco
patent: 4850802 (1989-07-01), Pankratz et al.
patent: 4944660 (1990-07-01), Joco
patent: 4986733 (1991-01-01), Fleury et al.
patent: 5176497 (1993-01-01), Deacon et al.
patent: 6164931 (2000-12-01), Norton et al.
patent: 2004/0057834 (2004-03-01), Shimizu

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