Turbocharger with a bearing arrangement for mounting a rotor shaft

摘要

A turbocharger, which is particularly suitable for a motor vehicle, includes: a rotor shaft with a turbine impeller and a compressor impeller disposed thereon. The rotor shaft has a roller bearing assembly for mounting in the housing of the turbocharger.

主权项

1. A turbocharger, comprising:
a casing; a rotor shaft carrying a turbine wheel and a compressor impeller; a rolling bearing assembly disposed to support said rotor shaft in said casing of the turbocharger, said rolling bearing assembly including two bearing units, each of said two bearing units including: a separate outer race element, an inner race element selected from the group consisting of a separate race element and a race element formed on or integrated in said rotor shaft, and a plurality of rolling elements disposed in between said outer and inner race elements; and a damping device for said rolling bearing assembly; said damping device including a damping coating, wherein at least one element selected from the group consisting of said outer race element and inner race element has an outer side with said damping coating formed thereon; and said damping device also including an additional damping coating and a spring element being disposed between two of said outer race elements and/or between two of said inner race elements of the two said bearing units.