As we all know, in the traditionalDC brushless fanIn the motor design, the fan blade rotor and its shaft core pass through the oil bearing, referred to as Sleve bearing. So what are the advantages and disadvantages of DC fans with oil bearings? The following are the advantages and disadvantages of DC fan oil bearings.
The DC fan is pivotally fixed on the basis of the stator of the motor to maintain a proper gap between the rotor and the stator. Of course, there must be a gap between the shaft core and the bearing to avoid locking the shaft core and failing to work; some stators in the motor stator structure will generate induced magnetic lines between the rotor and the stator after the power is input, and the control of the drive circuit will make the fan The motor works. Therefore, the traditional fan motor structure only needs a fan blade rotor, a motor stator and a drive circuit, and through the pivot between the shaft core and the bearing and magnetic field induction work.
Advantages of oil bearing:
1. The price is much cheaper than ball bearings.
2. Resistance to external impact, less damage during transportation.
Disadvantages of oil bearing:
1. Carry the product can not be used.
2. Due to the oil ring and Huashi obstruction at both ends of the bearing, the high-temperature gas generated by the friction between the motor running shaft core and the bearing forms nitrides, which easily blocks the gap between the shaft core and the bearing and hinders the smooth operation of the motor.
3. Due to the operation of the fan motor, the dust in the air will be sucked into the core of the motor and mixed with the lubricating oil stored around the bearing to form sludge, causing operating noise and even jamming.
4. The clearance between the bearing and the shaft core is small, and the activation effect of the motor operation is poor.
5. The inner diameter of the bearing is easy to wear and the service life is short.