BEARING STRUCTURE AND TURBOCHARGER

摘要

A bearing structure includes a bearing holder that has a hollow main body and an oil hole penetrating through from an outer circumferential surface to an inner circumferential surface of the main body to thereby guide a lubricating oil to the inside of the main body, and that is fixed in a bearing housing; two full-floating metal bearings that are arranged separated from each other in the axial direction of the shaft and support the shaft, in the bearing holder; two thrust bearing surfaces each arranged on the outside of two full-floating metal bearings in the axial direction of the shaft; and two collars each arranged on the outside of two thrust bearing surfaces in the axial direction of the shaft and provided for the shaft. The lubricating oil lubricates thrust bearing surfaces after lubricating full-floating metal bearings.

主权项

1. A bearing structure of a turbocharger including a shaft provided with wheels at both ends, and a housing in which the shaft is accommodated and an oil path for guiding lubricating oil is formed in the inside of the housing, comprising:
a bearing holder fixed in the housing, the bearing holder having a hollow main body provided with an outer circumferential surface and an inner circumferential surface, and an oil hole penetrating through from the outer circumferential surface to the inner circumferential surface of the main body and communicating with the oil path; two full-floating metal bearings configured to support the shaft, the full-floating metal bearings being arranged in the bearing holder and separately provided from each other in an axial direction of the shaft; and two thrust bearing surfaces each arranged on an outside of the two full-floating metal bearings in the axial direction of the shaft; wherein the lubricating oil after lubricating the two full-floating metal bearings lubricates the thrust bearing surfaces.