What happens when the electric fan is spinning?

1. Bearing wear causes axial direction.

Beating; 2. There are debris in the rotor gap; 3. Deformation of fan blades; 4. The net cover is not tightly fixed; 5. The axial movement of the motor is too large. The corresponding treatment is: 1. Replace the bearing with a new one; 2. Remove debris; 3. Correcting the fan blades; 4. Tighten the grille; 5. Add a washer to the shaft to make the shaft shift moderate.

If the fan blades do not rotate, it is a lack of oil on the shaft of the fan motor, and the fan motor should be carefully removed and drop a few drops of lubricating oil on the shaft of the fan motor, which is the flexible rotation of the fan motor shaft. If the fan blade rotation is flexible, but the motor still emits a "buzz.""The sound of the motor starting capacitor is broken, you can change the starting capacitor on the line, the position of the starting capacitor is connected to the two outlets of the motor, you just need to follow the motor outlet to find a black rectangular element, fixed with screws at the bottom, the top is generally marked or the one is the starting capacitor of the motor.

It may be that the blades on the bearing are loose; It may be that the bearing is worn, which makes the clearance of the blades larger; It may be that the fan has been used for a long time and its bearings lack lubricating oil; It may be the quality of the fan itself, the fan blade process is poor, and the center of gravity of the fan blade is eccentric, resulting in noise.

There must be something wrong with the motor in the electric fan.

It may be caused by the aging of the motor over time.

It could also be caused by a problem with the circuit in the motor.

If there is an abnormal noise, it should be dealt with as soon as possible, so as to save unnecessary safety hazards in the future.

There is a problem with the head drivetrain. The bearing is broken or stuck.

If the fan is very practical, but the "hum" of the motor is the starting performance of the motor, you can change a starting capacitor, and the starting capacitor is connected to the outlet end of the motor.

Precautions. 1 Look at random files.

The motor fan is randomly equipped with an instruction manual, a product certificate, an electrical circuit diagram and a packing list, and the packing list should be checked and the parts should be checked.

2 Look at the shape of the motor fan.

Carefully inspect the motor fan grille and fan blades for obvious deformation. Turning the fan blades should be light and flexible, and should not always stop at the same position.

3 Look at the startup performance.

The starting performance is an important quality indicator of the motor fan. During the inspection, in the slow gear, when the rated voltage of the power supply is 85%, the motor fan should be able to start from stationary and run normally, the shorter the time required for a motor fan to operate normally, the better the starting performance of the motor fan.

4 Look at the speed regulation performance.

After powering on, there should be no abnormal noise in the mechanical transmission part of the fan. When the electric fan is running at high, medium and low speeds, the motor and fan blades should be stable, with low vibration and low noise. The motor fan shakes head and stops quickly, without intermittent, stagnation and jitter.

1. The capacitance has become smaller, and the running torque of the motor fan is insufficient.

2. The motor fan bearing is short of oil, and the mechanical friction sounds (if it doesn't work to add lubricating oil, then the bearing can be replaced).

3. The motor may be out of phase (it may be that the incoming power supply is loose, the coil is burned, etc.) 4. The fan blades are a little deformed.

5. Check whether there is any debris inside the fan.

Solution: If it is cause 2, you can add lubricating oil to improve. If it is another problem, it is recommended to find a professional to fix it.

The fan is getting louder and louder because the fan is worn out due to the lack of oil in the bearings. The gap between the fan's shaft and bearings is too large, and the fan's axial movement clearance is too large, and the fan's blades can move back and forth by a few millimeters. The fan moves axially after rotating, and the plane of rotation of the fan blades is also shaking, which not only aggravates the wear, but also produces a lot of noise.

How it works

In addition, low-power motors such as DC motors and brushless DC motors are increasingly widely used in small fans.

When the electric fan is working (assuming that there is no heat transfer between the room and the outside world), the temperature in the room will not only not decrease, but will rise. Let's analyze the reason for the temperature increase: when the electric fan is working, because there is a current through the coil of the electric fan, the wire is resistive, so it will inevitably generate heat to release heat, and the temperature will naturally rise.

But why do people feel cool? Because there is a lot of sweat on the surface of the human body, when the electric fan is working, the indoor air will flow, so it can promote the rapid evaporation of sweat, combined with "evaporation needs to absorb a lot of heat", so people will feel cool.

Electric fanThe possible reasons for the sizzling sound as soon as you turn around are as follows:

1. It may be caused by the lack of oil in the bearing of the fan or the wear of the bearing hole.

2. Sometimes the gap between the shaft and the bearing of the fan is too large.

3. If the gear of the fan is not installed in place or there is a fault, there will be such an abnormal sound during the operation of the fan.

Suggested workaround:

1. If the electric fan suddenly appears this sound when working, you need to cut off the power supply first, check whether there is a lack of oil in the bearing, if you find that the bearing lacks oil or the sound of bearing wear, you need to supplement the lubricating oil on the bearing, so as to eliminate this sound.

2. After long-term use, the bearing in the electric fan may be worn out and the gap is too large.

3. Fixed fan blades, vibration noise is also an important part of fan noise, because the blade is loose on the bearing and the gap becomes larger due to bearing wear, so it is only necessary to remove the fan and tighten the screw buttons, so that after being firmly fixed, it will not vibrate again.

4. After the inspection, if you find that the gear of the fan is not installed in place, you need to find a professional maintenance personnel to disassemble and check the inside of the fan, repair the gear in time or replace the new gear, and restart the fan after installation to see if the sound can be eliminated.

Electric fanThere are several reasons why it squeaks when it turns:

1. It may be that the blades on the bearing are loose.

2. It may be that the bearing is worn, which makes the gap of the blade larger.

3. It may be that the fan has been used for a long time and its bearings lack lubricating oil.

4. It may be the quality problem of the fan itself, the fan blade technology is poor, and the center of gravity of the fan blade is eccentric, resulting in noise.

There are many reasons, such as lack of oil in the motor fan bearings and mechanical friction. The root of the blade is broken due to external force, and the sound is emitted due to the friction between the blade and the grille due to the action of centrifugal force during operation. It may be that the turning fan is sent out when the turning fan rotates, because the turning fan and the shaft rod in the middle belong to the case of metal dry friction, and the metal of the turning fan is not copper powder pressing or iron powder pressing, so there is no oil absorption effect.

During operation, the friction between the metal sleeve and the shaft rod will naturally cause a lot of noise, and improper adjustment of the distance between the turning page and the machine body will also cause friction noise. Noise can also be emitted if the placement is not smooth or the mechanical parts are not fastened properly. Suggested Treatment:

1. There is a shortage of oil in the motor fan bearing, in this case, you can add lubricating oil to improve the lubrication. 2. Check whether there is any damage to the root of the blade, and replace the blade in time. 3. When there is noise in the turning fan, you can take the part where the metal sleeve in the middle of the page is rubbed with butter and the shaft rod, and at the same time use the plastic gasket to adjust the distance between the page and the body to keep it moderate, not too close to avoid the noise caused by friction of the body due to the deformation of the page.

4. When noise is emitted due to unstable placement, the fan should be checked to ensure that it is placed smoothly, and all the loose parts of the fan should be tightened to ensure that no noise is emitted.