Bearing arrangement for a turbocharger, and turbocharger

Abstract

A bearing arrangement for a turbocharger, including a bearing housing-which extends in an axial direction, an anti-friction bearing, situated within the bearing housing, having an outer bearing ring and a number of rolling bodies and an axially extending shaft which is rotatably mounted within the bearing housing. It is provided that the shaft includes a rolling body raceway for guiding the rolling bodies. Moreover, the invention relates to a turbocharger having such a bearing arrangement. A bearing arrangement of this type allows the secure mounting of a shaft in a turbocharger with simple assembly and low costs.

1 - 11 . (canceled) 
     
     
         12 . A bearing arrangement for a turbocharger, comprising:
 a bearing housing extending in an axial direction;   an anti-friction bearing situated within the bearing housing and having an outer bearing ring and a plurality of rolling bodies; and   an axially extending shaft rotatably mounted within the bearing housing, the shaft having a shaft journal on an end-face side for fastening to a turbine wheel.   
     
     
         13 . A bearing arrangement for a turbocharger, comprising:
 a bearing housing extending in an axial direction;   an anti-friction bearing situated within the bearing housing having an outer bearing ring and a plurality of rolling bodies; and   an axially extending shaft rotatably mounted within the bearing housing, the shaft including a rolling body raceway for guiding the rolling bodies, the outer bearing ring being guided in the bearing housing by a support ring.   
     
     
         14 . The bearing arrangement as recited in  claim 13  wherein the shaft has a shaft journal on an end-face side for fastening to a turbine wheel. 
     
     
         15 . The bearing arrangement as recited in  claim 13  wherein the shaft, at least in the area of the rolling body raceway, is made of steel. 
     
     
         16 . The bearing arrangement as recited in  claim 13  wherein the shaft is composed of a plurality of axially adjacent shaft sections. 
     
     
         17 . The bearing arrangement as recited in  claim 16  wherein the shaft sections are welded together. 
     
     
         18 . The bearing arrangement as recited in  claim 13  wherein the shaft includes an inner recess. 
     
     
         19 . The bearing arrangement as recited in  claim 13  wherein the outer bearing ring includes a splash oil hole for acting on the anti-friction bearing with lubricant. 
     
     
         20 . The bearing arrangement as recited in  claim 13  wherein the shaft includes a plurality of grooves on its outer periphery for positioning sealing elements. 
     
     
         21 . The bearing arrangement as recited in  claim 13  wherein the shaft includes an oil separator. 
     
     
         22 . The bearing arrangement as recited in  claim 12  wherein the shaft, at least in the area of the rolling body raceway, is made of steel. 
     
     
         23 . The bearing arrangement as recited in  claim 12  wherein the shaft is composed of a plurality of axially adjacent shaft sections. 
     
     
         24 . The bearing arrangement as recited in  claim 23  wherein the shaft sections are welded together. 
     
     
         25 . The bearing arrangement as recited in  claim 12  wherein the shaft includes an inner recess. 
     
     
         26 . The bearing arrangement as recited in  claim 12  wherein the outer bearing ring includes a splash oil hole for acting on the anti-friction bearing with lubricant. 
     
     
         27 . The bearing arrangement as recited in  claim 12  wherein the shaft includes a plurality of grooves on its outer periphery for positioning sealing elements. 
     
     
         28 . The bearing arrangement as recited in  claim 12  wherein the shaft includes an oil separator. 
     
     
         29 . A turbocharger comprising:
 a compressor wheel;   a turbine wheel; and   a bearing arrangement as recited in  claim 12 , the compressor wheel and the turbine wheel being connected via the shaft, and the shaft being welded to the turbine wheel.   
     
     
         30 . A turbocharger comprising:
 a compressor wheel;   a turbine wheel; and   a bearing arrangement as recited in  claim 13 , the compressor wheel and the turbine wheel being connected via the shaft, and the shaft being welded to the turbine wheel.