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Rolling bearing and supercharger using the same

A technology of rolling bearings and rolling elements, applied in the fields of superchargers and rolling bearings, can solve problems such as reducing the viscosity of lubricating oil

Inactive Publication Date: 2009-04-22
JTEKT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the rolling bearing of the conventional structure cannot sufficiently satisfy this high-speed rotation, and therefore, for example, it may be proposed to reduce the viscosity of lubricating oil or form rolling elements (balls) by ceramic materials

Method used

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  • Rolling bearing and supercharger using the same
  • Rolling bearing and supercharger using the same
  • Rolling bearing and supercharger using the same

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0049] figure 1 is a sectional view showing a first embodiment of the rolling bearing of the present invention. The rolling bearing 10 rotatably supports a rotating shaft 41 in a center hole 43 formed in the housing 40 . image 3 A device in which such a rolling bearing 10 is used is shown in , for example a turbocharger used as a supercharger for an automobile engine. in the image 3 , the rolling bearings 10 are arranged in two rows in a spaced relation to each other in the direction of the axis C.

[0050] exist image 3 Among them, the turbocharger includes a casing 40 and a turbine shaft 41 supported in a central hole 43 of the casing 40 through the above rolling bearing 10 . The turbine shaft 41 has a turbine 42 mounted on one end portion thereof. The rolling bearing 10 supports the turbine shaft 41 such that the turbine shaft can rotate about the axis C.

[0051] exist figure 1 Among them, this rolling bearing 10 includes a separate inner ring 1 fitted on a turbin...

no. 2 example

[0085] This embodiment differs from the first embodiment in that the diameter of the second ball serving as the rolling body is smaller than the diameter of the first ball serving as the rolling body. In the following description, the same configurations as those of the first embodiment will be designated by the same reference numerals, respectively, and their explanations will be omitted.

[0086] In the second embodiment, as in Figure 8 As shown in , the diameter d2 of the second ball 5 ′ arranged radially inside the intermediate ring 2 is smaller than the diameter d1 of the first ball 4 ′ arranged radially outside the intermediate ring 2 (d2

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Abstract

Provided is an inner ring having a first raceway at an outer periphery thereof, an outer ring having a second raceway at an inner periphery thereof, an intermediate ring which is interposed between these, and has a third raceway at an inner periphery thereof and also has a fourth raceway at an outer periphery thereof, first rolling elements interposed between the first raceway and the third raceway, and second rolling elements interposed between the fourth raceway and the second raceway. The intermediate ring includes a larger-diameter ring portion, and a smaller-diameter ring portion formed on the larger-diameter ring portion through an inclined ring portion. The third raceway is formed at a boundary portion between the larger-diameter ring portion and the inclined ring portion, and the fourth raceway is formed at a boundary portion between the smaller-diameter ring portion and the inclined ring portion.

Description

technical field [0001] The present invention relates to a rolling bearing and a supercharger using the rolling bearing. Background technique [0002] Turbochargers have been widely used in automobiles because they can further enhance the performance of the engine. A turbocharger includes a housing, a turbine shaft supported within the housing by a bearing, and the bearing is generally known as a sliding bearing, such as that in Patent Document 1. However, in order to improve rotation characteristics such as poor response due to turbo lag inherent in a turbocharger, a structure has been proposed in which a rolling bearing is used as a bearing for supporting a turbine shaft, as shown in Patent Document 2 . [0003] In the rolling bearing, the upper limit of the rotational speed is determined based on, for example, lubrication conditions, and the rolling bearing is used below the upper limit. [0004] The turbine shaft of the above turbocharger rotates at a high speed, for e...

Claims

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Application Information

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IPC IPC(8): F16C19/55F01D25/16F02B39/00F16C19/18F16C33/58
Inventor 上野弘白木利彦大岛昭男阿部真树大槻正章中田龙二坂东重德中下智德气田健久井上哲朗
Owner JTEKT CORP
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