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Bearing parameters

Release date:2015-07-28views:1655

Life

Under certain load, the number of revolutions or hours before the experience of pitting bearing, which is called the bearing life.

Life of rolling bearings of the number of revolutions (or in hours of work at a certain speed) Definition: In this life bearing within, should occur initial fatigue damage (flaking or chipping) on any of the bearing ring or rolling elements. However, both in laboratory tests or in actual use, we can clearly see the appearance in the same working conditions identical bearing, the actual life different. There are also several different definitions of the bearing "life", one of the so-called "working life", which represents the actual life of a bearing can be achieved before the damage is usually not damaged by the wear caused by fatigue, but It is caused by wear and tear, corrosion, seal damage and other reasons.

Criteria for determining bearing life, bearing life and reliability of the link.

Due to manufacturing precision, uniformity of material differences, even in the same material, the same group of the same size bearings, used under the same operating conditions, their life is not the same length. In terms of the statistical life expectancy of the unit 1, the longest life of 4 relative units, the shortest 0.1-0.2 units, the ratio of the longest and the shortest life of 20-40 times. 90% of the bearing does not produce pitting, the number of revolutions or the number of hours after which called bearing rating life.

Dynamic load rating

To compare the bearing pitting carrying capacity, the provisions of the bearing rating life of one million revolutions (106), the maximum load can withstand the basic dynamic load rating, represented by C.

That is the dynamic load bearing rated C in under a million revolutions that the bearing (106) without the risk of pitting failure reliability of 90%, higher C greater carrying capacity.

For the basic dynamic load rating

1. Radial bearing load refers to pure radial

2. Thrust ball bearings refers to pure axial load

3. Radial thrust bearing means to produce pure radial displacement have radial component