Failure of ina cylindrical roller bearings during operation is a common occurrence, so there is no need to make a fuss. When a failure occurs, it is the key to determine the cause of the failure and handle it properly. When the mechanism is running, the part where the cylindrical roller bearing is installed is allowed to have a certain temperature. When stroking the mechanism shell with hands, 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, and the viscosity of the lubricating oil is too high; the mechanism assembly is too tight (insufficient clearance); the ina bearing assembly is too tight; the bearing race rotates on the shaft or in the shell; the load Too large; the bearing cage or rolling elements are broken, etc. 1) The roundness of the shaft and the seat hole and the verticality of the shoulder should be required according to the corresponding accuracy of the cylindrical roller bearing. 2) It is necessary to accurately calculate the interference fit of the rotating ferrule and the appropriate fit of the fixed ferrule. The burning interference of the rotating ferrule should also be small within the possible range. As long as the influence of thermal expansion at the working temperature and the influence of centrifugal force at the highest speed are ensured, the creeping or sliding of the tight-fitting surface will not be caused. According to the size of the working load and the size of the bearing, the fixed ring selects a very small clearance fit or interference fit. Too loose or too tight is not conducive to maintaining the original precise shape. 3) If the ina bearing is running at high speed and the working temperature is high, special attention should be paid to that the fit of the rotating ferrule should not be too loose to prevent eccentric vibration, and the fit of the fixed ferrule should not have gaps to prevent the ferrule. Deforms under load and excites vibration. Rolling 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 rolling bearings are more complicated, one of which is the wear of the mating surfaces of the inner and outer rings of the ina bearing. Due to this kind of wear, the matching relationship between the bearing and the housing, the cylindrical roller 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.
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