The failure phenomenon of cylindrical roller bearings is generally manifested in two types, one is that the temperature of the bearing installation part is too high, and the other is that there is noise in the operation of the bearing.
1. The bearing temperature is too high
When the mechanism is running, the part where the bearing is installed is allowed to have a certain temperature. When stroking the shell of the mechanism, it should be normal that it does not feel hot, otherwise it indicates that the bearing temperature is too high.
The reasons for the high bearing temperature are: the quality of the lubricating oil does not meet the requirements or deteriorates, the viscosity of the 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 in the shell; Large; the bearing cage or rolling elements are broken, etc.
2. Bearing noise
Cylindrical roller bearings are allowed to have a 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 reasons for the noise of cylindrical roller bearings are more complicated, one of which is the wear of the mating surfaces of the inner and outer rings of the bearing. Due to this wear, the matching relationship between the bearing and the housing, and the bearing and the shaft is destroyed, causing the axis to deviate from the correct position, and abnormal noise occurs when the shaft moves at high speed. When the bearing is fatigued, the metal on its surface will peel off, which will also increase the radial clearance of the bearing and produce abnormal noise. In addition, insufficient lubrication of the bearing, the formation of dry friction, and the cracking of the bearing will produce abnormal noises. After the bearing is worn and loose, the cage is loose and damaged, and abnormal noise will also occur.
Keyword: Precision metal parts
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