Bearing Technology of Cooling Fan

1. ---- Double ball bearing
Dual Ball Bearing (Dual Ball Bearing or Two Ball Bearing) uses two ball bearings, using rolling friction instead of traditional sliding friction, so there is less friction, no lubrication, and no oil leakage. Its advantages are: very long service life, good anti-aging performance, suitable for high speed fans. The disadvantages are high manufacturing costs and maximum noise.
Single ball bearing
Single ball bearing (ONE Ball Bearing or Ball+Sleeve Bearing) is an improvement on traditional oil bearing. It adopts a mixed form of sliding friction and rolling friction, using one ball bearing+one oil bearing to reduce the cost of dual ball bearings. Combining the advantages of oil bearing and double ball bearing, the disadvantage is that after adding balls, the operating noise increases, but it is still smaller than double ball bearing.
3. ---- Hydraulic bearing
Hydraulic Bearing is an improvement on oil bearing. The hydraulic bearing adopts a unique ring type oil supply circuit, which greatly reduces the problem of oil leakage, greatly prolongs its service life compared to ordinary oil bearing, and inherits the advantages of oil bearing: low operating noise, significantly reducing the working noise of the hydraulic bearing fan, and having a very long service life, which can reach 40000 hours. The hydraulic bearing is still essentially an oil bearing. However, this type of bearing has been improved, greatly extending its service life compared to ordinary oil sealed bearings, and inheriting the advantages of oil bearing - low operating noise.
4. ---- Oily bearing
Oil bearing is currently the most commonly used type of bearing. It uses lubricating oil as a lubricant and drag reducer, with the advantages of very low price and relatively low operating noise during initial use. Disadvantages: Bearings are easy to wear and have a short service life. In addition, this type of bearing has been used for a long time, and the lubricating oil in the bearing sleeve is prone to leak out, resulting in increased noise and contamination of other accessories.