Wan kun fan science popularization - Why does the centrifugal fan leak oil?
The oil leakage of centrifugal fans is mainly related to the sealing system, lubrication system, and installation and commissioning, which can be summarized into the following aspects:

1. Seal failure: The seal may lose its elasticity due to high temperatures, wear, or aging, causing lubricating oil to seep out from the gap between the shaft and the seal.

2. Lubrication failure: Excessive oil level, incompatible oil type, or blocked return oil channels prevent the lubricant from flowing back properly, leading to leaks.

3. Wear of components: Bearing or bearing seat wear leads to increased shaft deflection and clearance, causing lubricant to leak out.

4. Poor installation and maintenance can lead to significant coaxiality deviations, which accelerate the wear of seals, and loose bolts can cause gaps in the sealing surfaces of the housing, resulting in oil leaks.