Floating bearing cartridge for a turbocharger shaft

A floating bearing, turbine technology, applied in the direction of shafts and bearings, rolling contact bearings, bearings in rotating motion, etc., can solve problems such as being unsuitable for fast and easy precise installation, achieve improved axial load, reduce bearing wear, and stabilize The effect of running the job

Inactive Publication Date: 2009-10-28
CPI控股有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the coil or tolerance ring comprises a relatively flexible structure which is difficult to manufacture in a strong and rough form compatible with normal turbocharger operating conditions
Furthermore, support systems using such flexible spring coils or tolerance rings are generally not suitable for quick and easy precise fitting into a turbocharger center housing

Method used

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  • Floating bearing cartridge for a turbocharger shaft
  • Floating bearing cartridge for a turbocharger shaft
  • Floating bearing cartridge for a turbocharger shaft

Examples

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Embodiment Construction

[0019] As shown in the exemplary figures, there is provided a Figure 1-3 An improved turbine shaft bearing housing or system, generally indicated at 10, for use in turbochargers such as the illustrated turbocharger 14 ( figure 1 ) The rotating shaft 12 is rotatably supported in a high-speed machine. The improved bearing housing 10 includes a pair of axially spaced angular contact ball bearings or ball bearing units 16 and 16 for rotationally supporting the shaft 12 in a housing such as the illustrated turbocharger center housing 20 18. These angular contact bearings 16, 18 are designed to accommodate alternating axial loads during normal turbocharger operation. According to the invention, the angular contact bearings 16, 18 are slightly unloaded or slightly negatively preloaded in a static or stationary non-operating state, whereby the bearings 16, 18 operate during normal operation with reduced bearing wear and improved Withstands radial and alternate axial axial loads, t...

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Abstract

A bearing system for use in high speed rotating machinery, such as a turb ocharger (14), wherein a shaft (12) is rotatably supported by a floating bea ring cartridge ( 10) having axially spaced angular contact bearings (16, 18) each with a set of bearing balls (30) supported between inner and outer rac es (32, 34). The bearing cartridge includes an inner spacer sleeve (42) for axially spacing the inner bearing races, and a rotationally floating outer s leeve (46) having a pair of radially inwardly open grooves (52) for removabl y receiving snap-type retaining rings (54) which engage and axially space th e outer bearing races. The axial dimension of the inner spacer sleeve is elo ngated slightly relative to an axial dimension defined between outboard face s of the installed retaining rings, thereby slightly unloading the sets of b earing balls from their respective outer bearing races. Such slight axial un loading enhances smooth- running operation with minimal bearing wear, while accommodating transient loads during operation.

Description

technical field [0001] The present invention generally relates to improvements in bearing systems for high speed rotating machines or turbomachines, in particular turbochargers such as for supplying charge air at high pressure to internal combustion engines. More particularly, the present invention relates to an improved floating bearing cartridge having a pair of angular contact bearings for rotatably supporting a high speed rotating shaft, wherein the angular contact bearings are slightly unloaded, or slightly preloaded, so as to Minimal bearing wear to enhance smooth running operation while accommodating radial and alternating axial loads, thermal loads and transient state loads during normal operation. Background technique [0002] Turbochargers are known in the art for supplying charge air at low pressure to an internal combustion engine to improve engine performance. Such turbochargers typically include a turbine wheel and a compressor wheel or impellers mounted on a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C19/18
Inventor 小R·D·麦克基尔南
Owner CPI控股有限责任公司
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