Fractured-outer-race full-complement ball-bearing system incorporated in a turbocharger assembly
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United States of America Patent
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Nov 22, 2016
Grant Date -
Apr 4, 2013
app pub date -
Sep 28, 2012
filing date -
Sep 30, 2011
priority date (Note) -
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Abstract
A turbocharger ball-bearing assembly incorporates a cageless set of ceramic bearing balls operating within outer and inner bearing raceways, wherein the outer bearing raceway is on the inside of a fractured outer race. The fractured outer race is located in a counterbore of a center body of a turbocharger. The center body, in cooperation with the ball-bearing assembly, provides for rotationally supporting, and axially restraining, a rotor shaft of the turbocharger. The outside diameter of the fractured outer bearing race is less than a corresponding inside diameter of the counterbore, and the center body provides for supplying lubricant to an isolation annulus therebetween, so as to provide fir squeeze-film damping the ball-bearing assembly within the counterbore.
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