Patent ID: 9074477
Filing Date: 2015-07-07
Classification: F01D,F04D,F16D

Abstract:
1. A connector for connecting an impeller to a shaft, wherein the connector is formed as a unitary body, the connector comprising: a sleeve portion which is adapted to be frictionally connected on a radially outer surface of a shaft-side hub extension of the impeller, and a threaded portion carrying a thread which is adapted to screw onto a corresponding threaded portion of the shaft such that the connector provides a rotationally fixed connection between the impeller and the shaft; and wherein: the hub extension has a central recess, and a part of the connector is inserted into the recess, a clearance being provided between the part of the connector inserted into the recess and a side surface of the recess such that there is no contact between the connector and any side surface of the recess; and the frictional connection between the sleeve portion and the radially outer surface of the hub extension transmits, in use, all of the torque between the shaft and the impeller.