Release time:

2019-12-23

When buying a fan, you should generally understand, as follows: Information: 1. The size of the fan. 2 Determine whether the fan is DC or air conditioner? 3 Fan power supply voltage value. For example: AC 220V, 110V, 380V, DC 5V, 12V, 24V, 36V, 48V. 4 fan, ball or oil bearing form. The air volume and speed of the fan. For example, how many cubic meters per minute, or how many cubic feet per minute. 6 wind pressure value. Second, about the bearing: plain bearing In the design of a conventional DC brushless fan motor, the fan blade rotor (rotor for short) and its shaft core pass through oil-containing bearings and sleeve bearings for short, which are pivotally fixed in the center of the stator of the motor so that a proper clearance is maintained between the rotor and the stator. Of course, there must be a gap between the shaft core and the bearing to prevent the shaft core from being deadlocked and unable to operate. The stator structure part of the motor (referred to as the stator) will generate induced magnetic lines of force between the rotor and the stator after the input power, and the control of the drive circuit will make the fan motor run. Thus, conventional fan motor configurations have only one fan blade rotor, one motor stator, and one drive circuit, and operate in a field-induced manner through the pivotal connection between the shaft core and the bearing. 1. Advantages with oil bearing A. resistance to external impact, less damage during transportation; B. The price is cheap (compared with ball bearings, the price is very different. 2. Disadvantages with oil bearing A. Due to the operation of the fan motor, the dust in the air will be sucked into the motor core and mixed with the lubricating oil stored around the bearing to form sludge, which will increase the operating noise and even jam. The inner diameter of the bearing is easy to wear and the service life is short; C. cannot be used on portable products; D. The clearance between the bearing and the shaft core is small, and the starting effect of the motor is poor; E. During the operation of the motor, the high-temperature gas generated by the friction between the shaft core and the bearing is blocked by the oil rings and washers at both ends of the bearing, and cannot be removed to form nitride. The nitride is easily blocked in the gap between the shaft core and the bearing, Hindering the smooth operation of the motor.