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Bearing device for supercharger

A technology of bearing device and supercharger, which is applied to parts of pumping devices for elastic fluid, bearings for rotating motion, bearings, etc., can solve the problems of reducing bearing durability and outer ring displacement, and achieve improved durability sexual effect

Active Publication Date: 2014-03-12
TOYOTA JIDOSHA KK +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, adverse consequences such as displacement of the outer ring may occur, reducing the durability of the bearing

Method used

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  • Bearing device for supercharger
  • Bearing device for supercharger
  • Bearing device for supercharger

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] figure 1 A supercharger 1 comprising a bearing arrangement 10 according to an embodiment of the invention is shown. The supercharger 1 constitutes a supercharger comprising: a turbine rotor 2 provided in the exhaust passage of the internal combustion engine; a compressor impeller 3 provided in the intake passage of the internal combustion engine; and a turbine shaft 4 used for It serves as a rotating shaft that couples the turbine rotor 2 and the compressor impeller 3 for common rotation. The turbine rotor 2 and the turbine shaft 4 are formed integrally and coaxially with each other. The turbine shaft 4 is a stepped shaft, and a large-diameter portion 4a, a middle-diameter portion 4b, and a small-diameter portion 4c are provided in this order from the turbine rotor 2 side to the compressor impeller 3 side.

[0023]The middle diameter portion 4b is inserted into the bearing housing 5 of the supercharger 1, and the small diameter portion 4c extends through the bearing h...

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PUM

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Abstract

In a bearing device that includes: a pair of bearings (11, 12) that is disposed on a turbine shaft (4) of a supercharger (1); a case (22) that is a separate component from the pair of bearings and to which outer races (lib, 12b) of the bearings are fitted; a bearing housing (5) that is assembled with the case to form an oil-film damper (8); a sleeve (14) that is disposed between inner races (Ha, 12a) of the bearings to maintain a fixed distance (Y) between the inner races in the axial direction; and a spacer (23) that is disposed between the outer races to maintain a fixed distance (X) between the outer races in the axial direction, the outer races are located inward of end faces (22a, 22b) of the case in the axial direction, and the outer races are unconstrained to the outside in the axial direction.

Description

technical field [0001] The present invention relates to a bearing device for a supercharger used in an internal combustion engine or the like. Background technique [0002] For example, as a bearing device for a supercharger, Japanese Patent Application Laid-Open No. 4-72424 (JP-A-4-72424), Japanese Patent Application Laid-Open No. 4-8825 (JP-A-4-8825), Japanese Utility Model Publication 6-40908 (JP-Y-6-40908), Japanese Utility Model Publication 62-35195 (JP-U-62-35195), and Japanese Patent Application Publication 8-284675 (JP-A-8-284675 ) describes a bearing device in which an elastic member such as a coil spring is provided between the outer rings of a pair of ball bearings fitted on a rotating shaft, and a preload generated by the repulsive force of the elastic member is applied to the ball bearing, And the oil film damper supports the outer ring of the ball bearing. In addition, for example, Japanese Patent Application Laid-Open No. 2002-369474 (JP-A-2002-369474) descr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/059F04D29/056F01D25/16F16C19/18F16C19/54
CPCF01D25/162F16C2360/24F02C6/12F16C19/163F05D2220/40F04D29/0563F16C27/045F04D29/059F01D25/18F16C19/548F01D25/164F16C35/077
Inventor 北田孝佳奥村刚史
Owner TOYOTA JIDOSHA KK