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Bearing life evaluation method under different operating conditions

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The lifespan of the bearing is the number of life of the rolling bearing; it refers to the fatigue life of the bearing. For the batch bearing; the life is discrete; but the life spread is in accordance with the parameter Weibull dispersion. The life that 90% of the bearing can reach The definition is the bearing life; it can also be considered that the reliability of the bearing is 90%. Therefore, the higher the reliability of the bearing; the shorter the life; the common working time or the number of rotations of the bearing life is indicated.
The bearing life cannot accurately determine the length of operation of the bearing in all applications; therefore, some new life identification methods have been proposed for some operating conditions in these years; such as noise life, smooth life and precision life.
The fatigue life is rolling during the working process of the bearing; accepting the necessary load; even the static load; but for the steel ball and the raceway; the stress is cyclical; the data will be tumbling and then affect the bearing life. The appearance of the tumbling of the surface of the material is somewhat like the scales of the same scale; this representation is called the feeling of falling off (Flaking).
The number of noise life is on the bearing of the household appliance; the load accepted by the bearing is very good. However, after the bearing has been working for a while, wear, oscillation noise, smooth grease deterioration, etc. will occur, because the noise demand for the home appliance bearing is severe; When the bearing noise exceeds the allowable scale; it is considered that the bearing can not be used continuously. The total moment of low noise operation of the bearing is called the bearing noise life.
Smooth life digital household appliances generally use a non-protective grease smooth sealed bearing. Although the bearing is smooth, only a small amount of smoothing agent is needed; but after a long time of work, the smooth grease is deteriorated and leaked; the bearing is not smooth; then the bearing is invalid. The total moment of work in an outstanding smooth state is called the bearing life.
About light-duty bearings; bearing noise life and smooth life is shorter than bearing fatigue life. For example, household appliances bearings; only bearing selection and correct equipment; fully satisfied with the life of the host matching requirements.

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