Learn some common sense of buying a cooling fan

　　General knowledge of purchasing a cooling fan: When purchasing a fan, you should generally understand the following necessary information: Confirm whether the fan is DC or communicating. The value of the power supply voltage of the fan. For example: to communicate 220V, 110V, 380V DC 5V, 12V, 24V, 36V, 48V fan bearing method, ball or oil.

　　The air volume and speed of the fan. For example, how many cubic meters per minute, or how many cubic feet per minute. Wind pressure value. Regarding the bearing, the oil-impregnated bearing traditional DC brushless electric fan motor is designed in which the fan blade rotor (rotor for short) and its shaft core pass through the oil-impregnated bearing, or SLEEVE bearing for short, which is pivotally fixed at the center of the motor stator so that the rotor and the stator. Adhere to an appropriate gap between.

　　Of course, there must also be a gap between the shaft core and the bearing, so that the shaft core will not be deadlocked and unable to work; and the stator structure of the motor (referred to as the stator), after the power input, will induce induction between the rotor and the stator The control of the lines of magnetic force and the drive circuit make the fan motor work. Therefore, the traditional fan motor architecture only needs a fan rotor, a motor stator and a drive circuit, and the shaft core and the bearing are pivotally connected to work with magnetic field induction.

　　Using the advantages of oil-retaining bearings. Resistance to external impact, less damage during transportation; low price (compared with ball bearings, the price difference is very large. The defect of using oil-impregnated bearings. Dust in the air will be sucked into the center of the motor due to the operation of the fan motor, and The lubricating oil stored around the bearing is mixed into sludge, which causes noise at work and even jams. The inner diameter of the bearing is simply worn and the service life is short.

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