Under certain ideal operating conditions, angular contact ball bearings can achieve life beyond traditional calculations: in the case of light loads; or "contaminants are effectively separated and limited by a lubricating film by rolling surfaces (tracks and rolling elements), Under the ideal conditions of reducing the surface damage of the rolling surface. But in fact, there are various factors in the reality that affect the service life of angular contact ball bearings. The simple analysis is as follows:
(1) poor lubrication
The lubricating oil (or grease) used in the angular contact ball bearing has a certain working temperature. When the temperature is too high, it will deteriorate, thus losing the lubricating effect, causing the angular contact ball bearing to be burnt due to high temperature. In addition, the poor quality of the lubricating oil (or grease) itself or the inadequate refueling (fat) during operation may also cause the temperature of the angular contact ball bearing to rise or produce abnormal sound.
(2) rotor imbalance
Generally speaking, the rotor of the running equipment must be dynamically and statically balanced before assembly, so angular contact ball bearings are not problematic. However, some rotors are subject to corrosion of the medium or wear of solid impurities during operation, or the shaft is bent, resulting in unbalanced centrifugal force, which causes the angular contact ball bearings to generate heat and vibration, and the raceway is seriously worn until it is destroyed. .
(3) Check and replace is not timely
During the operation of the angular contact ball bearing, the inspection shall be carried out regularly according to the regulations. If there is heat, abnormal sound, vibration, etc., it is necessary to stop in time to find the cause and eliminate the fault. If the angular contact ball bearing is found to have severe fatigue peeling, oxidative corrosion and wear. If pits, cracks, and hardness are reduced to HRC<60, or if excessive noise cannot be adjusted, it should be replaced in time. If the inspection and replacement are not timely, it will cause serious damage to the bearing or even the rotor, thus affecting normal production. In addition, the improper removal of the angular contact ball bearing and the vibration caused by the looseness of the equipment anchor bolts may also cause the indentation of the angular contact ball bearing raceway and the rolling element, and the cracking of the inner and outer races of the bearing.
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Label: Talking about the factors affecting the service life of angular contact ball bearings
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