Patent ID: 8845271
Filing Date: 2014-09-30
Classification: F01D,F02C,F16C,Y10S

Abstract:
1. A bearing system for carrying a turbocharger shaft for rotation at very high speeds in the presence of very high turbocharger exhaust gas temperatures, comprising an outer bearing element with a cylindrical outer surface adapted to be rotationally carried on lubricant film by a turbocharger bearing housing and an inner surface comprising two axially spaced inwardly-projecting portions, each inwardly projection portion having an inner cylindrical journal-bearing surface for carrying a turbocharger shaft and each having an outer side thrust bearing surface positioned in-between said cylindrical outer surface and said journal-bearing surface and adapted to be engaged by a rotating thrust bearing surface carried by the turbocharger shaft, said two axially spaced inwardly projecting portions of the outer bearing element forming, with the turbocharger shaft, a lubricant reservoir whereby lubricant contained within the lubricant reservoir flows outwardly between the turbocharger shaft and the inner cylindrical journal bearing surfaces of the inwardly projecting portions of the outer bearing element, and outwardly between the outer side thrust bearing surfaces of the inwardly projecting portions of the outer bearing element and rotating thrust bearing surfaces carried by the turbocharger shaft for lubrication of their adjacent surfaces, said outer bearing element further comprising an outwardly extending flange having two opposed surfaces adapted to engage stationary surfaces of the turbocharger and provide thrust bearing surfaces to carry thrust forces of the turbocharger shaft through a film of lubricant to the stationary surfaces of the turbocharger.