Several aspects and bearing failure elimination method

1. When fatigue pitting rolling bearing under load. In contact with the inner and outer surface of roller contact stress will occur. Due to inner and outer ring and rolling body at work have a relative rotation, therefore contact stress for pulsating cycle changes. Produced under when the contact stress exceeds limit value, surface fatigue crack, and gradually extended to the surface, so that the inner and outer ring raceway can roller surface fatigue pitting the accuracy loss of rolling bearing rotation, noise, shock and vibration. Therefore, pitting is rolling bearing failure forms of 2. Plastic deformation when the rolling bearing rotational speed is low or only swing, excessive wide load or impact load will make bearing raceway and rolling body contact to produce larger local exceed the material yield limit, will produce a larger plastic deformation, if the deformation exceeds a certain Fan Tian. Bearing will not work properly. So the plastic deformation is another failure forms of rolling bearing. In order to judge whether the bearing of the removed can be used again, check after bearing clean, carefully check the raceway surface, rolling surface, cooperate with the state, the abrasion of cage, the increase of the bearing clearance, and presence of dimensional precision, abnormal falling damage. Not separated type ball bearing, the inner ring with one hand support levels, rotate the outer ring confirm whether smooth. Diagnosis: 1) Engine speed by the idle speed to medium speed when excessive noise is clear, with higher speed, the noise is more outstanding, for bearing ring. 2) Fire test of a cylinder is carried out, the sound diminished or disappeared, for the cylinder bearing ring. 3) No matter what speed and temperature are sound and engine vibration, do fire test sound doesn't change, is for the bearing alloy ablation.