RETENTION OF A ROTOR OF AN ELECTRONICALLY-CONTROLLED TURBOMACHINE
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United States of America Patent
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Issued Date -
Aug 18, 2016
app pub date -
Oct 25, 2014
filing date -
Oct 25, 2014
priority date (Note) -
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Abstract
An electronically-controlled turbocharger (ECT) includes an electric machine provided on the shaft of the turbomachine. It is desirable to mount the electric machine on the shaft in such a way that it can be removed for servicing. Disclosed herein is an ECT in which the rotor of the electric machine is retained on the shaft by a nut that is used to snug up the rotor against a shoulder on the shaft. Alternatively, the shaft and the rotor have a taper and the nut is used to cause the interior taper of the rotor is caused to engage with the exterior taper of the shaft. In yet another alternative, the rotor has fingers that engage with splines on the shaft. In some embodiments, to help prevent relative rotation of the shaft and the rotor, one or both of mating surfaces are roughened to increase the friction between the surfaces.
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