When a Deep Groove Ball Bearing rotates, the raceway surface of the inner ring and outer ring is in rolling contact with the rolling body, so the running track is a dark surface. The running track attached to the raceway surface is not abnormal, so the load conditions can be known. Therefore, please pay close attention to and observe the running track of the raceway surface when the bearing is removed. If you carefully observe the running trajectory, you will know that it only bears radial loads, bears large axial loads, bears torque loads, or has extreme stiffness inequality on the bearing box.
It can be checked whether unexpected loads have been applied to the bearings and whether installation errors are significant, and become a clue to investigate the cause of bearing damage. If there is no wrong selection and correct use, the Deep Groove Ball Bearing will be used for a long time before its service life. In this case, the damage state is peeling. On the other hand, there are also unexpected early damages that cannot withstand use. As the reasons for this early damage, there are insufficient considerations in use and lubrication, as well as foreign object invasion, errors in bearing assembly and large shaft deflection, and insufficient research on the shaft and bearing box.
It can be said that there are many cases where these reasons overlap with each other. Therefore, on the basis of fully understanding the machine used for the bearing, the service conditions, and the structure of the bearing periphery, if we can understand the situation before and after the accident, and then investigate the damage of Deep Groove Ball Bearing and various reasons, we can prevent the recurrence of similar accidents.
The failure of Deep Groove Ball Bearing is generally manifested in two ways: one is that the temperature of the bearing installation part is too high, and the other is that there is noise in the bearing operation.
1. The bearing temperature is too high
During the operation of the mechanism, a certain temperature is allowed at the location where the bearings are installed. When touching the mechanism shell with your hand, it should be normal not to feel hot, otherwise it indicates that the bearing temperature is too high.
The reasons for high bearing temperature include: the quality of lubricating oil does not meet the requirements or deteriorates, and the viscosity of lubricating oil is too high; The mechanism assembly is too tight (insufficient clearance); The bearing assembly is too tight; The bearing race rotates on the shaft or inside the housing; Excessive load; The cage or body of Deep Groove Ball Bearing is broken.
2. Bearing noise
The Deep Groove Ball Bearing is allowed to make slight running noise during operation. If the noise is too loud or there is abnormal noise or impact, it indicates that the bearing is faulty.
The noise of Deep Groove Ball Bearing is caused by complex reasons. One is the wear of the matching surface of the inner and outer rings of the bearing. Due to this wear, the mating relationship between the bearing and the housing, as well as between the bearing and the shaft, is disrupted, resulting in the axis deviating from the correct position and producing abnormal noise during high-speed movement of the shaft. When the bearing is fatigued, the metal on its surface peels off, which can also increase the radial clearance of the bearing and produce abnormal noise. In addition, the insufficient lubrication of bearings, the formation of dry friction, and the crushing of Deep Groove Ball Bearing will produce abnormal sound. After the bearing is worn and loose, the cage becomes loose and damaged, which can also produce abnormal noises.