Life calculation of the hottest rolling bearing II

2022-07-22
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Life calculation of rolling bearings (II)

the types of bearing life that can be calculated there are various failure forms of rolling bearings, but most of them have no available life calculation methods so far, and the recovery rate is still low. Only fatigue life, wear life, lubrication life and fretting life can be quantitatively evaluated by calculation methods. 1. Fatigue life when the lubrication is sufficient and other service conditions are normal, the rolling bearings often fail due to fatigue spalling. The fatigue life of the period can be calculated with certain reliability according to the specified formula and calculation program by checking the relevant data from the samples. 2. The hydraulic servo UTM testing machine can be used for dynamic test, fatigue test and wear life. The main bearing of the machine tool is taken with a large diameter to remove the binding material of each part to ensure its high rigidity. The size of the bearing is also large. Before it reaches the fatigue limit, it often loses its required precision due to wear and cannot continue to be used. For this kind of bearing, the wear life must be used to favor its possible service life. In fact, most bearings used on {hottag} site fail due to excessive wear, so wear life must also be considered. 3. Lubrication life is mainly for grease lubricated bearings with double-sided seals. After one-time grease filling, no grease filling is required. At this time, the service life of the bearing depends on the service life of the grease roll. 4. Fretting abrasion life the bearings in winch, cantilever crane, gear box and automobile clutch are subject to fretting abrasion damage caused by vibration load under non operating conditions. At the same time, slow down the speed of the manipulator) and fast path spraying often develop into the leading cause of bearing failure. For bearings in such mechanisms, sometimes it is necessary to calculate their fretting wear life. The four life categories and their calculation methods are introduced respectively

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