1. Lubricate the bearings
The most important part of the fan transfer is the bearing. After a long time, it lacks lubricating oil, so noise will be generated when it rotates at high speed. Therefore, we only need to put a few drops of lubricating oil on the fan bearing, if you do not use a sewing machine instead. But be careful not to use edible oil instead, because its particles are relatively large and easily cause damage to the bearing.
2. Fixed fan blades
Vibration noise is also an important part of fan noise. Because the blades are loose on the bearings and the bearings are worn, the gap becomes larger. Therefore, you only need to remove the sub-fans and tighten the screws. Shake again.
3. Polish the fan blades
In addition, poor quality cooling fans are used. Due to process defects in the production of such fans, the center of gravity of the fan blades may not be on the axis, resulting in "eccentricity". If the fan is used for a long time, the "eccentricity" phenomenon of the fan will be affected. It becomes more and more serious, which not only produces noise, but also damages the CPU in serious cases. In this regard, you can remove the total and then hang it on its center with a thin wire, wait for it to stand still and see which side it sinks, lightly grind the sinking end on the grinding wheel for a few times, and then perform the test. Install the fan after it can be in a horizontal position.