Shaft fixing system for impeller wheel with radial thrust esp for turbocompressor has sleeve engaging with wheel hub and shaft spindle

摘要

The fixing system for an impeller wheel hub (3) with radial thrust and an uneven weight distribution along its length, mounted on a drive shaft spindle (8), consists of a sleeve (7) with an end flange (15) forming an assembly joint between the hub and spindle. The sleeve surfaces are shaped to engage with the shaft spindle and hub and transmit a rotation from one to the other, and is fixed in place by a long bolt (16) and nut (19). The back (6) of the impeller wheel has a centering projection (13) made in one piece with the hub and shaped to butt against a shoulder (17) on the shaft.