Common sense of bearings in brush making equipment - a brief description of the viewing method of lubricants for roller bearings_Latest News

Common sense of bearings in brush making equipment - a brief description of the viewing method of lubricants for roller bearings

First of all, apply a little lubricant and rub it between the two fingers. If there are pollutants, you can feel it; or apply a thin layer of lubricant on the back of the hand, and then check the light seal. Then it's time to replace the lubricant for the rollers. Use oil-lubricated roller bearings. After the old oil has been drained, if possible, fresh oil should be refilled and the machine should be rotated at a low speed for a few minutes. Allow the oil to collect residual contaminants as much as possible, and then purge the oil.

Note: It is best to filter the oil before use. When using grease-lubricated bearings to replace the grease, the remover used should avoid any part of the bearing with cotton material. Because these residual fibers may be wedged between rolling parts and cause damage, especially the use of small bearings requires more attention to this problem.

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After running for a period of time, the vibration and noise maintain a certain level, and the frequency spectrum is very single, with only one or two times frequency appearing. The spectrum above three times the power frequency rarely appears, and the condition of the roller bearing is very stable, entering a stable operation period.

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After continuous operation and entering the late stage of use, the vibration and noise of the bearing begin to increase, and sometimes there are abnormal sounds, but the change of the increase in vibration is relatively slow. At this moment, the kurtosis value of the angular contact ball bearing suddenly reaches a certain value. We believe that the bearing is showing early failure at this moment.

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At this time, close monitoring of the bearing is required to pay close attention to its changes. Afterwards, the bearing kurtosis value began to decrease rapidly and approached the normal value, while the vibration and noise began to increase significantly, and the increase rate began to accelerate. When the vibration exceeded the vibration standard (such as ISO2372 standard), the bearing kurtosis value It also begins to increase rapidly. When both the vibration standard and the kurtosis value exceed the normal value (the available kurtosis relative standard), we think that the roller bearing has entered an early stage of failure, and it is necessary to repair the equipment and replace the bearing in time.

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The time from the early failure characteristics of the bearing to the occurrence of serious failure (usually bearing damage such as shaft holding, burns, sand frame spalling, raceway, bead wear, etc.) generally does not exceed one week. The larger the equipment capacity, the faster the speed, the other The shorter the interval time. Therefore, in the actual diagnosis of bearing faults, once the early fault characteristics are found, it should be decisively judged that the bearing is faulty and repaired as soon as possible.