First of all, some equipments require TIMKEN bearings to be particularly strict with their own clearance problems. If the clearance is too large, even if it is slightly larger, it will easily wear parts of the equipment, so it is only necessary to reduce Clearance to solve this problem, but another problem has arisen, that is, if the clearance is too small, the problem of heat dissipation, if the heat is not properly, it will easily lead to an increase in internal temperature and eventually cause the bearing to overheat and burn!
Secondly, it may be an excessive load (preload is too large). The speed is too high. The play is too small. There is water or other foreign matter invading. If the above two cases are not the case, the accuracy of the shaft and the bearing housing is poor, and the deflection of the shaft is large. Seeing this, I think everyone wants to know the solution. First, we should study the lubricant and lubrication method, choose the TIMKEN deep groove ball bearing lubricant, and its dosage, and correct the bearing selection. Research is to match, bearing clearance and preload, and to improve the seal. Check the accuracy of the shaft and bearing housing. Of course, if you have an expert next to you, let him operate and learn the best!
1, the cleaning of the bearing
When disassembling the lower bearing for inspection, first record the appearance of the deep groove ball bearing, confirm the residual amount of the lubricant, and then wash the bearing after sampling the lubricant for inspection. As a cleaning agent, gasoline and kerosene are commonly used.
The cleaning of the removed bearing is divided into coarse cleaning and fine fine washing. In the container, the metal mesh bottom is placed first, so that the bearing does not directly contact the container. When rough cleaning, if the bearing is rotated with dirt, it will damage the rolling surface of the bearing and should be noted. In the rough cleaning oil, use a brush to remove the grease and the adhesive. After it is almost clean, it is transferred to the fine wash.
Fine washing is to carefully clean the deep groove ball bearing while rotating in the cleaning oil. In addition, the cleaning oil should always be kept clean.
2. Inspection and judgment of bearings
In order to judge whether the removed bearing can be reused, check the bearing after cleaning, carefully check the raceway surface, the rolling surface, the state of the mating surface, the wear of the cage, the increase of the bearing clearance and whether there is dimensional accuracy. Falling damage, abnormality. For non-separable ball bearings, use one hand to support the inner ring and rotate the outer ring to check if it is smooth.
Separate bearings such as tapered roller bearings can be inspected separately for the rolling surfaces of the rolling elements and the outer ring.
Because large bearings cannot be rotated by hand, pay attention to the appearance of rolling elements, raceways, cages, ribs, etc. The higher the importance of bearings, the more careful inspection is required.
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