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On the basic concept of SKF bearing fatigue life  

2013-01-23 10:03:00|  分类: 技术 |  标签: |举报 |字号 订阅

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SKF bearings fatigue life is under certain technical conditions (structure, process status, coordination, installation, clearance and lubrication) of rolling bearing, run the host until scrolling surface fatigue spalling occurs when the host requirements cannot be met within the bearing, outer ring (shaft, washer) worth – relative rotation number of revolutions.
When the SKF bearing speed more or less constant, fatigue life and total number of transfer expressed in the number of total hours of operation.
Are many factors that affect SKF bearing fatigue life, cannot be fully estimated time or be eliminated through standard testing conditions, which creates the actual fatigue life of SKF bearings are very discrete, SKF bearing fatigue life calculation and test is based on mathematical statistics and probability theory.
Scroll SKF bearing fatigue life of most commonly used expression parameter for rating life L10, recommended in ISO standards R281 L10 means clearly defined as follows:
"Enough of the same group of bearings on the number, its rating life L10. Revolutions (or at the same speed in hours) to represent, 90% in fatigue spalling in the bearing can reach or exceed this speed before they occur (or hours) ". So far, all parts of the world to comply with the above provisions.
In the United States and some other countries, using the concept of value in life. Lm value in life refers to a group of same bearings of value in life means 50% before bearing fatigue peeling off to meet or exceed the total number of go, number of working hours or at a certain speed.
Lm value in life is not a bearing life of the arithmetic mean. General value in life is about 5 times the rated life of times. Rated life expectancy only applies the concept of a sufficient number of bearings, and does not apply to individual bearings.
Not for actual use due to fatigue failure of bearing, rating fatigue life of significance on behalf of the SKF bearing material potential can be expected to play in normal life. Therefore, in most cases, the user in selecting the SKF bearings fatigue life calculation, and then checking the actual failure category.

本文来源http://www.beier-bearingshop.com/skf-bearing.shtml


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