Turbocharger

Abstract

A turbocharger, having a turbine with a turbine housing and a turbine rotor, (a compressor with a compressor housing and a compressor rotor that is coupled to the turbine rotor via a shaft, a bearing housing arranged between the turbine housing and the compressor housing, in which the shaft is mounted via a bearing. An end disc adjoins the bearing ring or the bearing bush. On an axial surface facing the bearing ring or the bearing bush of the bearing facing the turbine, a swirl chamber that is open in the direction of the bearing ring or the bearing bush is introduced into the end disc, which collects and discharges oil leaking from a lubrication gap of the bearing.

1 . A turbocharger, comprising:
 a turbine configured to expand a first medium, comprising:
 a turbine housing; and 
 a turbine rotor; 
   a shaft;   a bearing facing the turbine;   a compressor configured to compress a second medium utilising energy extracted in the turbine during expansion of the first medium, comprising:
 a compressor housing; and 
 a compressor rotor that is coupled to the turbine rotor via a shaft; 
   a bearing housing arranged between the turbine housing and the compressor housing in which the shaft is mounted by way of the bearing facing the turbine;   an end disc adjoins a bearing ring or a bearing bush of the bearing on a side facing the turbine; and   a swirl chamber that is open in a direction of the bearing ring or the bearing bush is provided on an axial surface facing the bearing ring or the bearing bush of the bearing facing the turbine and configured to collect and discharges oil leaking from a lubrication gap of the bearing.   
     
     
         2 . The turbocharger according to  claim 1 , wherein the end disc is formed in one piece. 
     
     
         3 . The turbocharger according to  claim 1 , wherein the swirl chamber circulates in a circumferential direction and comprises an oil drain opening in a circumferential position. 
     
     
         4 . The turbocharger according to  claim 3 , wherein the oil drain opening has an opening angle in the circumferential direction between 5° and 90°. 
     
     
         5 . The turbocharger according to  claim 1 , wherein the swirl chamber of the end disc is limited on a side facing away from the bearing ring or the bearing bush by a closed axial wall and on a radially outer side by a closed radial wall. 
     
     
         6 . The turbocharger according to  claim 5 , wherein the swirl chamber is contoured such that an extension of a chamfer of the bearing ring or the bearing bush facing the swirl chamber intersects the closed axial wall. 
     
     
         7 . The turbocharger according to  claim 6 , wherein the extension of the chamfer of the bearing ring or of the bearing bush facing the swirl chamber intersects the closed axial wall in a transition region to the closed radial wall. 
     
     
         8 . The turbocharger according to any one of the  claim 7 , wherein the swirl chamber is limited on a radially inner side facing the shaft by a web. 
     
     
         9 . The turbocharger according to  claim 8 , wherein the web, emanating from the closed axial wall, extends in a direction of the axial surface facing the bearing ring or the bearing bush and ends, spaced apart, in front of the axial surface. 
     
     
         10 . The turbocharger according to  claim 9 , wherein the web defines a sealing gap to the shaft an axial length of which amounts to between 0.1 times and 0.7 times an axial thickness of the end disc and/or a radial width of which amounts to between 2 times and 20 times a radial bearing play between the bearing ring or the bearing bush and the shaft.