Patent ID: 6364634
Filing Date: 2002-04-02
Classification: F01D,F04D,F05D

Abstract:
A rotor for an engine turbocharger, the rotor including a turbine wheel, a compressor wheel, a separate shaft connected at opposite ends with the turbine and compressor wheels for rotation together about a common axis, and connecting means comprising:first and second joints each including alignment couplings joining opposite ends of the shaft with adjoining inner ends of the compressor wheel and the turbine wheel respectively, said couplings being configured to coaxially align and drivingly engage the shaft with the compressor and turbine wheels, and a fastener rod extending axially through at least the shaft and the compressor wheel and engaging the turbine wheel to retain the shaft and the wheels together with a compressive force, said rod being resiliently stretchable to limit changes in retaining force on the wheels and shaft due to axial dimensional changes in the rotor components during operating and stationary conditions.