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Self-aligining roller bearing

A self-aligning roller bearing and roller technology, applied in rolling contact bearings, bearing components, shafts and bearings, etc., can solve problems such as harmful effects, shortened service life of bearings, and reduced hardness, so as to prolong service life and increase Coefficient of friction, effect of suppressing slippage

Inactive Publication Date: 2006-08-23
NSK LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This high temperature tempering process can promote the decomposition of retained austenite, but this process has a detrimental effect, making the hardness lower
Therefore, surface damage such as peeling etc. tends to occur on the inner ring, and thus the service life of the bearing is shortened

Method used

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  • Self-aligining roller bearing
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  • Self-aligining roller bearing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0054] Embodiments of the present invention will be described below with reference to the accompanying drawings. Herein, these examples each show only one example of the present invention, and should not be construed as being limited to these examples at all. In addition, design changes may be appropriately made to these embodiments within the scope of the present invention.

[0055] The following will refer to Figures 1 to 12 A first embodiment of the present invention will be described.

[0056] figure 1 is an axial sectional view of the spherical roller bearing according to the first embodiment of the present invention. exist figure 1 Among them, the spherical roller bearing 10 according to the first embodiment of the present invention has an inner ring 11 . Double-row tracks (hereinafter also referred to as “inner ring track surfaces”) 12 a , 12 b are formed on the outer peripheral surface of the inner ring 11 along the circumferential direction of the inner ring 11 ...

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PUM

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Abstract

An outer ring raceway surface (14) formed on the inner peripheral surface of an outer ring (13) has roughness higher than that of inner ring raceways (12a, 12b) of an inner ring (11). Average roughness (Ra) in the axial direction and circumferential direction of the outer ring raceway surface (14) is 0.1 mum <= Ra <= 0.5 mum in the ranges of b1 / (B / 2) <= 0.9 AND B2(B / 2) <= 0.9 and in the measurement length of 0.1 mm to 1.0 mm, with B the width of the outer ring (13), b1 and b2 the distances in the axial direction from both end surfaces of the outer ring (13). Roughness parameter (S) of the outer raceway surface is 0 < S <= 20 mum.

Description

technical field [0001] The present invention relates to the extension of the service life of self-aligning roller bearings used in general industrial machinery, machine tools, vibrating screens, steel industry, motorcycle engines and the like. Background technique [0002] Spherical roller bearings have the advantage of being able to prevent abnormal loads and improve radial load capacity because the contact state of the rolling elements does not change even when the outer or inner rings are tilted due to assembly errors or impact loads. Thus, spherical roller bearings are widely used as various roll neck bearings in papermaking machines, vehicle bearings, various industrial bearings, and the like. [0003] Incidentally, in a clean environment in which an oil film is satisfactorily formed, general ball bearings or cylindrical roller bearings break due to the subsurface initiated fracture. This subsurface-initiated type of cracking indicates the initiation of fatigue cracks ...

Claims

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Application Information

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IPC IPC(8): F16C23/08F16C33/58F16C33/34F16C33/64
Inventor 植田光司植田彻
Owner NSK LTD