Date: 2013-08-20

INA bearings in different working conditions of life evaluation

The INA bearing life, refers to the bearing fatigue life. A batch of bearings, life is discrete, but life distribution parameters which obey Weibull distribution. The definition of life can reach 90% bearing is bearing life, also can think the reliability of bearings is 90%. Therefore, the higher reliability of bearings, the shorter life expectancy, bearing life common running time or number of rotation of said.
INA bearing life can not accurately assess all applications bearing the length of time, so in recent years on the part of the use of conditions and puts forward some new life assessment methods, such as noise life, lubrication life and precision of life. The use of standard conditions and life assessment of bearing
The rolling fatigue life of bearing load, speed and high environment temperature motorcycle gearbox bearings etc.
Noise life of load is very small, but for the low noise high performance requirements of air-conditioning, washing machine and other household appliances with low noise bearing etc.
Accuracy life load is very small, but the speed is very high precision machine tool main bearing, main bearing of aviation engine etc.
Fatigue life
INA bearing in operation, under some load, even if it is a static load, but steel balls and raceways, stress is the move in circles, materials will occur rolling fatigue as a result of the bearings to life. The phenomenon is a part of the rolling surface materials like fish scales fall off, this phenomenon is known as fatigue spalling ( Flaking ).
Noise in life
For household appliances load bearing, INA bearing is very small, very long bearing life. But the shaft bearing running after a period of time, will produce wear, vibration and noise increases, grease deterioration. Due to the strict requirements for appliances bearing noise, when the bearing noise beyond the allowable range, that the bearing can not continue to use. The total time bearing low noise operation called bearing noise life.
Lubrication life
Household appliances INA bearings generally use grease lubrication maintenance free sealed bearing. Although the bearing lubrication only need to trace the lubricant, but after long time operation due to deterioration of grease and leakage, lubrication of bearings, so that the bearing failure. The total time running bearing good lubrication condition called bearing life.
For light load INA bearing noise life, and lubrication life bearing short on Bearing fatigue life. Electric home as long as the bearing, bearing selection and installation is correct, and can fully meet the requirements of the lifetime of the host matching.

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