Application restrictions and principle of rolling bearing fatigue life

1. Application of rolling bearing fatigue life limit as mentioned above, the fatigue life of rolling bearings ( Regardless of the correction) , only the bearing material itself in a certain load cases to estimate the fatigue failure. This estimate and practical application of the bearing condition of there's a big difference. Here are a few can't included in the calculation of the: ( 1) Fluctuations in load bearing fatigue test is in some given load condition, carried out by test rig. Therefore, the numerical results and experimental results have good consistency. But in practical application, the actual load with the working condition of the mechanical equipment and, at the same time, it is impossible for this change in the computing do one hundred percent of the simulation. Like this, even if included in the influence of work, still can only roughly similar, but not as a test bed to do calculation and practical. ( 2) Lubrication and the condition of temperature fluctuations in the L10 life didn't consider the effect of lubrication, but the actual work condition could not add lubrication. So easy to make calculated value tend to be conservative. Even if included in the correction coefficient of lubrication, also can only be limited kind of lubrication characteristics ( Under the different temperature) Plan into consideration. And actually mechanical equipment running temperature fluctuations on the lubrication effect is very big, so also have no way to simulate the actual situation the change of temperature, the lubrication effect on life. ( 3) Improper operation in the process of installation and removal of bearing, if slightly improper, for bearing damage, the damage point will become the source of bearing failure, it is not included in the consideration. ( 4) The influence of tolerance matching tolerance matching actually running life of the bearing has a great influence, in the L10 life calculation, only estimates of tolerance to cooperate. 1. Application of rolling bearing fatigue life limit as mentioned above, the fatigue life of rolling bearings ( Regardless of the correction) , only the bearing material itself in a certain load cases to estimate the fatigue failure. This estimate and practical application of the bearing condition of there's a big difference. Here are a few can't included in the calculation of the: ( 1) Fluctuations in load bearing fatigue test is in some given load condition, carried out by test rig. Therefore, the numerical results and experimental results have good consistency. But in practical application, the actual load with the working condition of the mechanical equipment and, at the same time, it is impossible for this change in the computing do one hundred percent of the simulation. Like this, even if included in the influence of work, still can only roughly similar, but not as a test bed to do calculation and practical. ( 2) Lubrication and the condition of temperature fluctuations in the L10 life didn't consider the effect of lubrication, but the actual work condition could not add lubrication. So easy to make calculated value tend to be conservative. Even if included in the correction coefficient of lubrication, also can only be limited kind of lubrication characteristics ( Under the different temperature) Plan into consideration. And actually mechanical equipment running temperature fluctuations on the lubrication effect is very big, so also have no way to simulate the actual situation the change of temperature, the lubrication effect on life. ( 3) Improper operation in the process of installation and removal of bearing, if slightly improper, for bearing damage, the damage point will become the source of bearing failure, it is not included in the consideration. ( 4) The influence of tolerance matching tolerance matching actually running life of the bearing has a great influence, in the L10 life calculation, only estimates of tolerance to cooperate.