After a period of motion, the vibration and noise are maintained at a certain level, and the spectrum is very single, only one or two times the frequency. There are very few spectrums above the power frequency, and the state of the self-aligning ball bearings is very stable and enters a stable working period.
After continuing to run, the vibration and noise of SKF bearings begin to increase, and sometimes abnormal sounds appear, but the change of vibration increases slowly. At this time, the bearing kurtness value suddenly reaches a certain value. We believe that SKF bearings are initially faulty at this time.
At this time, it is required to closely monitor the SKF bearing and pay close attention to its changes. After that, the bearing kurtosis value begins to drop rapidly and approaches the normal value, while the vibration and noise begin to increase significantly, and the increase rate begins to accelerate. When the vibration exceeds the vibration standard (such as ISO2372 standard), the bearing kurtosis value also begins. Rapid increase, when both exceed the vibration standard, and the kurtosis value also exceeds the normal value (the available kurtosis is relative to the standard), we believe that the self-aligning ball bearing has entered the late fault production, and it is necessary to repair the equipment in time and replace the SKF bearing.
SKF bearings exhibit late failure characteristics to serious failures (generally bearing damage such as axles, burns, sand cracks, raceways, bead wear, etc.) are not more than one week. The larger the equipment capacity, the faster the speed. The shorter the interval. Therefore, in the actual fault diagnosis of self-aligning ball bearings, once the late fault characteristics are found, the bearing should be judged decisively and the maintenance should be arranged as soon as possible.
The use factors mainly refer to whether the installation adjustment, use and maintenance, maintenance and repair, etc. meet the technical requirements. According to the technical requirements of SKF bearing installation, use, maintenance and maintenance, monitor and check the load, speed, working temperature, vibration, noise and lubrication conditions of the SKF bearing in operation, find the cause and immediately adjust the cause. Make it back to normal.
First of all, when the spindle bearing in the spindle is in operation, it is necessary to fully ensure the lubrication, and the lubricant is periodically added according to the actual use condition, and the oil cannot be cut off for a long time. Therefore, for the user company, a better and more suitable spindle lubricant should be used. The new special spindle oil can significantly improve the lubrication performance, extend the oil change interval, extend the service life of the spindle and the self-aligning ball bearing, and also has better anti-rust and anti-corrosion properties.
Secondly, the bearing with reinforced nylon material cage should be used at a temperature lower than 120 °C.
In addition, care should be taken when cleaning and cleaning the spindle to prevent damage and scratching the surface of the roller. To remove the residue of the SKF bearing part as much as possible, it is better to rinse and suck the inside of the ingot to clean the residual oil. Care should be taken to avoid the use of the dumping type to cause the accumulation of cleaning waste to remain in the bearing parts, resulting in problems such as noise and wear failure of the self-aligning ball bearings.
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