Bearings are a crucial component in ultra-fine air jet mills, directly impacting the normal operation and production efficiency of the equipment. Bearing overheating is a common malfunction in ultra-fine air jet mills, and the main reasons for its occurrence are as follows:

Excess, insufficient, or contaminated lubricant can be one of the main causes of bearing overheating and damage. Therefore, it is crucial to add lubricant to the bearing housing in accordance with standards, typically filling 70% to 80% of the bearing space. Both overfilling and underfilling are detrimental to bearing lubrication and heat transfer. If the lubricant is contaminated or has degraded, the bearing housing must be thoroughly cleaned before new lubricant is added.

2. The bearing base is uneven. This condition can also affect the motor rotor of the ultra-fine air jet mill not being concentric with the mill rotor, causing additional shock loads on the bearing and leading to overheating. In such cases, immediately shut down the machine for inspection, resolve the issue before resuming use, and prevent premature bearing failure.

3. The bearing cover of the crusher is too tightly fitted with the shaft. Either too tight or too loose of a fit between the bearing and the shaft can lead to overheating of the bearing. Once this issue occurs, during equipment operation, there will be a noticeable grinding sound and significant vibration. At this point, the machine should be immediately stopped, the bearing removed, the area of friction repaired, and then reassembled according to specifications.

During the operation of the ultra-fine air flow mill, if bearing overheating or noise occurs, it should be immediately shut down for inspection, and reactivated only after the fault is resolved.