Briefly clarify the accounting of bearing life

Source: China Bearing Network Time: 2013-08-20

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Usually; the rolling bearing life cycle accounting process is:
1. According to the technical parameters of the main engine and the layout of the support part; the type and scale of the primary bearing; the effect of the calculation on the bearing,
2. Calculate the equivalent dynamic load,
3. Calculate the life of the bearing based on the extra life of the bearing formula,
4. Check the additional static load and limit speed.
The extra life of rolling bearings refers to the number of running (over 106 revolutions) or the number of working hours at a certain speed of 90% of the bearings in a batch of bearings before they fall off.
About the extra extra life of ball bearings:
L10=(Cr/Pr)3 (million revolutions)
In practice accounting; usually the number of hours of operation is used to indicate the life of the bearing (hours);
Lh=(Cr/Pr)3/(60n)*106 (hours)
In the meantime, Cr: is the radial extra dynamic load (KN); it refers to a set of rolling bearings that are supposed to accept a stable radial load; the fundamental extra life under this load effect is one million revolutions.
Pr: is the radial equivalent dynamic load (KN); refers to the radial mass change load of various applied loads subjected to bearing practice.
About the extra extra life of roller bearings:
L10=(Cr/Pr)10/3 (million revolutions)
The number of hours of operation (hours) is indicated by the number of hours of operation:
Lh=(Cr/Pr)10/3/(60n)*106 (hours)
The extra life calculation method is based on the usual bearing steel and normal operating conditions; the reliability of the life is 90%. Considering the influence of data and operating conditions and the demand for high reliability; the world standardization arrangement has carried out the extra life formula. Correction; added reliability factor, data coefficient and operating condition coefficient.
At present, the life expectancy of the world's leading ball bearing practice is more than ten times the calculated life; the reliability is more than 95%; the service life of the ball bearing produced by our factory can reach the domestic leading level.

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