Date: 2013-08-20

Bearing load in operation inspection

Metallurgical bearing material is a major factor affecting the quality of early bearing failure. As metallurgical technology (such as bearing steel, vacuum degassing, etc.), to improve the quality of raw materials. Raw material quality factors in bearing failure analysis, the proportion has decreased significantly, but it is still one of the main factors bearing failure. Select still must consider whether it is appropriate bearing failure analysis.
Bearing Manufacturing will go through forging, heat treatment, turning, grinding and assembly of multi-channel process operation. Reasonable handling, advanced, will also affect the stability of the bearing life. Influence of heat treatment and grinding bearings, bearing failure is often associated with a more direct relationship related to product quality. In recent years, research deterioration of the surface layer of the bearing that the grinding process is closely associated with the bearing surface quality.
Bearing service life analysis of the main task is based on extensive background material, data and failure mode analysis to identify the main factors causing bearing failure, therefore, suggest improvements, extend bearing service period, in order to avoid a sudden onset of early bearing failure.
Power operation, no-load speed began to slowly improve the conditions stipulated in rated operation. Commissioning items to check whether there is abnormal sound, the bearing temperature, lubricant leakage or color and so on. If abnormal, should immediately suspend operation, inspection machinery, if necessary, to remove the bearing inspection.
1, the bearing life
Under certain loads, bearing in pitting elapsing revolutions or the number of hours, called bearing life.
Due to manufacturing precision, uniformity of material differences, even the same material, bearing the same batch of the same size, at the same operating conditions, is not the same as the length of its life. In terms of statistical life expectancy of a unit, the longest life expectancy of four units of the relative, the shortest of 0.1-0.2 units, the longest and shortest life expectancy ratio of 20-40 times.
To determine the bearing life standards, the bearing life and reliability linked.
2, rated life
Same specifications (models, materials, technology) group of bearings, in the same work conditions, 90% of the bearing does not produce pitting, experienced revolutions or hours known bearing rating life.
3, the basic dynamic load rating
For the basic dynamic load rating
(1) refers to pure radial bearing radial load
(2) thrust ball bearing is the pure axial load
(3) refers to the thrust bearing was generated purely radial displacement radial component

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