Most of the fans use oil bearing, this bearing is usually a powder metallurgy products, tight package in the bearing outside the linoleum should store a lot of oil, so that it gradually penetrate into the bearing oil hole, the lubrication.
When the fan work, the motor temperature rise, friction between the shaft and the bearing heat, will gradually consume the oil. Such as lubricating oil should not be added, the fan motor can not maintain normal operation, will produce lower speed or even cling to the phenomenon, burn the motor.
Usually the fan during use, every 1-2 months should be from the oil filler, can be used sewing machine oil or spindle oil. In the gearbox of the fan, grease is used (industrial vaseline or calcium based grease). Usually 3 to 4 years have to be replaced once, the replacement should be removed after the rear shell, remove the balance button, and then remove the gear box cover, with a small bamboo chip lightweight tools to scrap the old grease inside, and then clean with gasoline Net, and then fill in the right amount of new lubricant.
1. Fan motor with a larger capacity than the specified motor will increase the working current, it is easy due to overheating the motor. If the capacity does not exceed the original capacity of 15% or can be used.
2. Fan capacitor for a small change: 2.5UF now changed to 1.2UF, you can use, the error is only the torque becomes smaller, lower speed. The replacement of small capacitors can also start the fan, that is, people often say that the small horses carts, the impact on the life of the capacitor, the impact of the motor is 30 seconds to start up the fan because you replace the small capacitor may need 1 Minutes to start up, can imagine the motor will be hot. Life will be shortened. Capacitance is used to start the motor, the speed of the speed is driven by the governor of the current size. I am talking about the heat because you replace the small capacitor caused by the fan motor starting time to produce the heat. Has long been affected by the motor. It is recommended that you do not change too small is the reason.
Because the fan is mostly single-phase, and direct use of single-phase power can not produce a sufficient start magnetic field, can not maintain good operation
So this motor generally have two windings, is the main winding and auxiliary winding, the main winding directly into the circuit, auxiliary winding through the capacitor after the string into the circuit. So that the auxiliary winding has an angle difference and the capacitor is the role of phase shift, so that the phase of a deviation, which is equivalent to get 2-phase power, and the phase is different, you can start the rotor, and then the main winding to maintain the magnetic field Let the He ran, auxiliary winding to continue to promote, so that it does not stop because of external forces. To ensure the operation of the good
The size of the start capacitor is only the size of the starting speed of the fan can be changed. Do not believe you can search for the effect of the capacitor. Once the fan is activated, that is, the capacitor once the discharge is completed only after the capacitor to cut off the role of DC. Will not be involved in the operation of the fan. Because the capacitor only charge and discharge function.
If you want to determine the fan capacitor failure, you can teach you a simple way. Open the fan switch if the fan does not turn, hand clockwise rotation of the fan if you can successfully start, then prove that the start capacitor has been breakdown.