TURBOCHARGER HAVING A CONNECTOR FOR CONNECTING AN IMPELLER TO A SHAFT
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United States of America Patent
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Issued Date -
Feb 12, 2015
app pub date -
Dec 10, 2012
filing date -
Jan 10, 2012
priority date (Note) -
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Abstract
A connector for connecting an impeller to a shaft is provided. The impeller has a shaft-side hub extension with a central recess. The impeller is formed of a material having a greater coefficient of thermal expansion than the material of the shaft. The connector is inserted into the recess to frictionally connect an outwardly facing surface of the connector with a radially inner surface of the hub extension. The connector has a threaded portion carrying a thread which screws onto a corresponding threaded portion of the shaft, such that the connector provides a rotationally fixed connection between the impeller and the shaft. The connector is formed of a material having a coefficient of thermal expansion which is greater than the coefficient of thermal expansion of the material of the shaft.
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