Split type high-speed rolling bearing body of turbocharger

Abstract

The invention relates to the technical field of vehicle parts and in particular relates to a split type high-speed rolling bearing body of a turbocharger. The bearing body comprises a turbine rotor shaft, two angular contact ball bearings, an outer spacing bush, an inner spacing bush and a head bush, wherein the angular contact ball bearings are arranged at two ends of the turbine rotor shaft in a sleeving manner; the outer and inner spacing bushes are clamped between the angular contact ball bearings; the head bush is arranged on the top of the turbine rotor shaft; the angular contact ball bearings, the outer and inner spacing bushes and the head bush are designed as a split type structure and are assembled as a whole through the turbine rotor shaft; the part technique is simplified; the adaptation of a ceramic material with poor machining performance and excellent mechanical performance by the angular contact ball bearings is facilitated; the heat generation amount is small, the temperature rise is low and the stability is high; by virtue of a double-oblique-face structure, the cooling space is enlarged and cooling liquid passages can be convenient to arrange; the outer and inner spacing bushes are arranged between the angular contact ball bearings, through specific selection and match, the extreme speed can be increased and the service life limit can be prolonged; and the assembly is simple, the machining cost is lowered and the maintenance and replacement are convenient.

Description

technical field [0001] The invention relates to the technical field of vehicle accessories, in particular to a separated high-speed rolling turbocharger bearing body. Background technique [0002] The turbocharger on the car consists of a compressor casing, a turbine casing, a bearing body, a sealing sleeve, a turbine, a turbine rotor shaft and a pressure impeller. The key to achieving high speed and long life is the performance of the bearing body. The structure and material of the bearing body are directly related to the performance and reliability of the supercharger. [0003] At present, turbocharger bearings are mainly divided into two types, one is floating bearing pad bearing, that is, a ring that is set on the shaft, and there are gaps between the ring and the shaft, as well as between the ring and the bearing seat, forming a double oil film. The circular ring floats between the turbine rotor shaft and the bearing seat, and when the supercharger is working, the circ...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the disadvantages of the existing turbocharger bearings, such as large running resistance, unstable dynamic control, short life, high cost and difficult maintenance, the present invention provides a separate high-speed rolling turbocharger bearing body

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