Electric fans are relatively simple household appliances. Generally, some small problems during use can be solved by themselves, such as why the fan does not turn. So, today, the editor will introduce to you the reasons why the fan does not turn.
1. What is the reason for the fan not turning?
1. Poor maintenance and long-term lack of lubricating oil. The part of the fan shaft is to ensure that there is lubricating oil, otherwise the motive of the fan blade on it will not be able to drag. If you are at home, you can choose to turn off the power and then turn the fan blade. If the rotation is stiff, there is basically no lubricating oil.
2. Wear and tear caused by prolonged use. If a fan is used for a long time, the motor will be worn out, and the shaft sleeve of the motor will easily burn out after being worn.
3. The fan does not rotate due to overheating. There is a motor in the fan device, and there is an overheating circuit breaker in the motor. If there is a short circuit in the coil winding, the heat generation will increase in a short time. In this case, the motor will "strike" and stop moving.
4. The starting capacitor capacity becomes smaller. When the fan is used for a long time, the capacitance of the capacitor will be reduced, resulting in a smaller starting torque of the motor and unable to drive the load.
5. Electrical faults, such as line damage.
Second, the fan does not turn how to repair
1. The motor is not lubricated: the first thing to think about is that the motor is not lubricated, and the rotating shaft must be lubricated. The motor cannot be dragged by the fan blade installed on it. After removing it, the rotating shaft can still run normally, which means that the motor is not broken. How to judge the lack of oil? After disconnecting the power supply, you gently move the fan blade and find that the rotation is a little stiff, which means that the oil is gone, but it rotates easily, which means that the lubrication is good. .
2. Excessive motor loss: Secondly, you have to consider how long the electric fan has been used, the motor will be worn out, and the motor bushing will be easily burned after being worn. When the motor is used for a long time, the internal resistance of the motor will also increase, and the load capacity will become lower, resulting in the inability to drive the fan blades to rotate.
3. Motor overheating: Motor overheating will also cause the motor's load capacity to deteriorate, and the motor's active power to become lower, resulting in the inability to drive the load.
4. The coil winding is partially short-circuited: From the inside of the motor, there is a protection device inside it, and there is an overheating circuit breaker, that is, the coil winding is partially short-circuited, resulting in a sharp increase in heat generation, and the circuit breaker is open. In this case of the motor, generally strike. This rarely happens.
5. Reduced capacitor capacity: Another is that the starting capacitor capacity becomes smaller. Although those parameters are written on the nameplate, the capacitor capacity will decrease after a long time, resulting in a smaller starting torque of the motor and unable to drive the load. This is simple, remove the capacitor and replace it with a new one, the same model should be fine. But it is better to change to one that is 20% larger than the original one, and you will get better results.
6. The axial clearance of the shaft of the motor is too large: if the motor is disassembled, the axial clearance of the shaft is too large and should be adjusted by adjusting the gasket. When installing the motor, the rotor must be concentric with the bearing, the screws should be slowly tightened diagonally, and then tap the shaft with a screwdriver to make it concentric. It's easy to disassemble the motor, but it's not easy to put it back in again. Don't happen the above situation, otherwise, it will be "broken" directly.
