Buzz
1. Noisy Fan due to Blade Deformation
Blade Deformation
Improper operation or maintenance checks may cause collisions of the fan blades leading to deformation. After assembly, the imbalance of the fan will cause the protective grille to shake, resulting in loud noise during operation.
Solution:
You can use tools or your hands to reshape the fan blades back to their original shape. If misalignment of the fan blades causes eccentric operation resulting in noisy vibrations, adjust the position of the blade cover to minimize vibration and noise.
Misalignment of Fan Blade Shaft and Electric Motor Shaft
The fan blade shaft and electric motor shaft are incorrectly positioned, creating a large gap that causes the fan blades to be eccentric, resulting in loud noise during operation.
Solution: Use thin copper sheets to wrap the rotating shaft to minimize loud noise from the fan during operation.
2. Due to Shaft Bearings
Shaft bearings with worn-out oil and large clearances
One end of the shaft bearing is tight while the other end is loose, causing the shaft to be non-concentric. Electric motor rotation will produce jerky vibrations along with noise. Prolonged operation will cause friction between the stator and rotor steel cores.
Excessive clearance in the shaft bearing causes direct friction with the metal shaft, lacking lubricating oil resulting in noisy fan operation.
Solution:
Firstly, thoroughly inspect the shaft bearing. Clean any dirt on the shaft bearing with a piece of paper. Then, firmly place and install the stiff bearing. If the stiff bearing does not slide down or only moves slightly when touched, the gap between the shaft bearing and the rotating shaft is accurate. If the shaft bearing falls automatically, it indicates a large gap.
At this point, reinstall the shaft bearing in reverse 180 degrees. Carefully pour oil into the oil inspection hole to ensure long-lasting lubrication. If both methods fail to resolve the noisy fan issue, consider replacing the shaft bearing.
Low Concentricity
Low concentricity between the front and rear guard rings with the rotor is also a cause of fan vibration, jerking, and loud noise during operation.
To fix this issue:
Reassemble both front and rear caps, tighten the screws firmly with one hand while gently rotating the rotor with the other hand, then tighten the screws again.
The above are the causes and solutions to the common problem of noisy fans that you need to know. Remember to save for reference and application. Don't forget to follow Mytour for quick updates on the most useful information.
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