Fan Bearing

If you’re using a computer, you’re probably familiar with the sound of a fan whirring. The fan’s job is to keep your computer from overheating, but have you ever thought about what’s inside the fan that makes it spin? One crucial component of a fan is the bearing.
Fan bearings work by reducing the amount of friction between the fan blades and the motor shaft. As the fan blades spin, the lubrication allows them to move more freely, reducing the amount of wear and tear on the motor.

Bearing design for fans may be designed in a variety of ways depending upon the size, operating conditions, etc. and a wide range of oilless bearings would be required to cover every type of application.
Particulars of suitable bearing seating tolerances are given in the application notes but it should be remembered that the selection of tolerances relates, in these instances, to the sizes of bearings applied.
Consequently, for similar applications using bearings of other sizes. it may be necessary to select different tolerances for the shaft seatings. Recommendations regarding tolerance selection are to be found in the VIIPLUS General Catalogue. However, it is advisable to consult VIIPLUS about tolerances for fans bearing for special operating conditions.

VIIPLUS fan bearings offer significant advantages over roller bearings, including simpler construction, lower failure rate, easier maintenance, reliable operation, lower noise, and reduced cost. While roller bearings may offer slightly lower initial power consumption, their drawbacks outweigh this benefit.

Roller bearings are more expensive due to the precise machining required for installation and the higher cost of the bearings themselves. They also exhibit poorer reliability, as dust contamination significantly reduces their lifespan. Maintenance is more complex, requiring specialized tools and a time-consuming installation process. Furthermore, roller bearings generate increased noise as clearances develop over time.

Overall, plain bearings are superior for fan applications. Powder metallurgy sliding bearings provide an excellent solution. Premature fan failure is often attributed to inadequate maintenance, which is crucial for any high-speed rotating component regardless of bearing type.

1. Surface dust: The dust on the surface of the rotating shaft and the dust on the inner hole wall of the fan bearing will affect the noise. Before assembly, the surface of the shaft should be wiped clean with a lint-free cloth.

2. Surface scratches and bruises: The shaft and the fan bearing are both precisely matched. The bruise on the shaft surface or the scratch on the inner wall of the bearing will cause scratching friction noise, and at the same time destroy the stability of the fan and affect the life of the motor. Care should be taken to avoid bumps during the rotation of the shaft and the processing and handling of the semi-finished rotor.

3. The adjustment is not smooth: the structure of the fan motor bearing is required to tap the periphery of the end cover with a hammer to make it smooth, concentric, and smoothly transfer after assembly. If the rotor is not concentric, the rotor will be stuck. Due to the weight of the rotor, the center of gravity will deviate to one side, resulting in large periodic friction noise. conform to the judgment standard.