Selection and Precautions of External Rotor Axial Flow Fan

How to choose the outer rotor axial flow fan?

1. When purchasing an external rotor axial fan, you need to check whether the axial fan will produce strong vibration and friction sound to determine whether the impeller of the axial fan is normal. Next, check whether there are impurities in the lubricating oil of the fan bearing. Need to replace new lubricating oil.

2. When choosing a suitable outer rotor axial fan, we need to consider the actual use place and occasion.

3. To judge the use efficiency of the outer rotor axial flow fan, the fan with good performance can meet the requirements of low noise and compact structure size under the condition of setting parameters. After the airflow passes through the designed flow channel, the loss can be reduced to relatively small.

4. After purchasing the axial flow fan, observe and start the fan during one use, check whether the rotation direction of the fan blade is consistent with the direction marked by the rotation mark, stop the trial operation for 10 to half an hour after the inspection is completed, check whether the blade is loose, and whether the connecting bolts between the damping seat and the foundation are loose. Only after all tests are qualified can the formal start-up and production be carried out.

The use of external rotor axial fan need to pay attention to what?

Check whether the fan rotates flexibly, whether the blades are stuck or rubbed, and whether there are tools and impurities in the fan and adjacent pipes. If no problems are found during the debugging process, we can officially use it.

The use effect of the fan will be affected by pressure, air volume, power, etc. How to make the fan play a huge value under limited energy depends on how we adjust the fan in use.

Monitor the motor current. The sign of the fan load is not the current, so we should pay more attention to the abnormal phenomenon of the fan in use. Once the fan vibrates, emits abnormal noise or has serious friction, it must be resolved in time, otherwise the use effect of the axial fan will be greatly reduced.

Maintenance and Fault Analysis of External Rotor Axial Flow Fan

One: maintenance of external rotor axial flow fan

1. The fan can only operate under normal conditions.

2. If the fan is started after maintenance, please pay attention to whether all parts of the fan are normal.

3. Regularly clean the dust, dirt and other impurities inside the fan, and check the belt tightness at any time to prevent the belt from being too tight and slipping.

4. The fan must be serviced during shutdown.

5. If any abnormal situation is found during the operation of the fan, it should be stopped immediately for inspection.

6. In addition to replacing the grease after each repair, the grease is generally replaced every three months.

Two: the main fault of the outer rotor axial flow fan

1. The fan vibrates violently, the casing or air inlet frictions with the impeller, the impeller rivets are loose or deformed, the fan intake and exhaust pipes are not installed correctly, resonance occurs, there is dust and dirt on the blades, the impeller is deformed and the shaft is bent, and the rotor is unbalanced.

2. The bearing temperature is too high, the bearing box vibrates violently, the bearing is damaged or the shaft is bent, the grease is of poor quality or contains impurities.

3. The motor current is too large, the temperature rise is too high, when starting, the inlet and outlet pipes are not tight, the input voltage is too low or the single-phase power supply is cut off, the spindle speed exceeds the rated value, the input medium density is too high or the temperature is too low.