Turbocharger with hydrodynamic foil bearings

摘要

A turbocharger (50) comprising:a compressor (60) comprising a compressor housing (61) and a compressor wheel (63) mounted in the compressor housing (61);a turbine (70) comprising a turbine housing (71) and a turbine wheel (74) mounted in the turbine housing (71);a shaft (52) connecting the compressor wheel to the turbine wheel;a one-piece center housing (90) disposed between and mounted to the compressor and turbine housings, the center housing (90) defining a bore that receives the shaft (52) therethrough;a hydrodynamic foil bearing cartridge (100) mounted in the bore of the center housing (90) rotatably supporting the shaft (52) the bearing cartridge (100) comprising a foil thrust bearing assembly (160) retained between first and second foil journal bearings (120,140), the bearing cartridge and center housing being configured such that the bearing cartridge (100) is insertable as a unit into the bore of the center housing (90) from an end of the center housing adjacent the compressor (60).