Loading and failure of rolling bearings

1. Load bearing characteristics of rolling bearings
       (1) The contact load and stress change when the rotating ring and the rolling element pass through the points of the bearing area; and the contact load and stress at each contact point are characterized by pulsating circulation; the unloaded area is not loaded;
      (2) The load and stress of each point of the fixed ring are unequal, and the contact load and stress at each bearing point are characterized by the same pulsation cycle, but the amplitude values ​​are different;
      The maximum value of the load at the lowest end is, for deep groove ball bearings (class 6): F0 = (4.37 / Z) Fr.


2. Failure form of rolling bearing
     (1) For normal running bearings (10 r/min<n<nlim) - fatigue pitting of inner and outer rings and rolling elements;
     (2) For bearings that are stationary or have low speed (n ≤ 10 r/min) or intermittent oscillations - plastic deformation of the inner and outer rings and rolling elements;
     (3) Unavoidable friction and wear of the inner and outer rings and rolling elements;

3. Design criteria for rolling bearings
     (1) For normal running bearings - to prevent fatigue pitting, based on the calculation of fatigue strength, calculate the life;
     (2) For low-speed bearings, or bearings that are subjected to continuous loads or subjected to intermittent loads without rotation, it is required to control plastic deformation, - to calculate static strength;
     (3) For high-speed running bearings - in addition to the life calculation, the limit speed of the bearing must also be checked.https://www.supplyforever.com/