The basis of a centrifugal fan is a rotating blade wheel called an impeller, which drags the incoming air or gas into a circular motion. It is then pushed out of the fan by the centrifugal force created by the rotation. When entering and exiting the fan, the airflow changes direction. This is the centrifugal fan principle.

In order to ensure the normal operation of the fan and improve the service life of the fan, we often carry out regular maintenance and maintenance on the various parts of the fan.

1. From the principle of the centrifugal fan, it can be seen that the impeller is an important component, so the maintenance of the impeller is essential. First, the impeller must be checked for cracks, wear and other defects from time to time. Second, the impeller must be kept clean, and the dust and rust on it should be brushed off regularly with a wire brush, because with the increase of operating time, these dusts cannot evenly adhere to the impeller, which will cause the impeller to lose its balance and cause the rotor to vibrate. Third, as long as the impeller is repaired, it needs to be dynamically balanced. If possible, you can use a portable test balancer for field balancing.

2. We also cannot ignore the maintenance of the casing and the air intake chamber. In addition to regularly checking the casing and intake chamber for severe wear and heavy dust accumulation, also regularly check that all fastening bolts are tight.

3. Bearing maintenance is equally important. In daily use, it is necessary to check the oil supply of bearing lubricating oil frequently. If there is oil leakage in the tank, you can slightly tighten the bolts of the end cover. If that doesn't work, you may have to replace it with new packing.

4. If we do not use the centrifugal fan for a long time, what maintenance work can be done? 1. When the ambient temperature is lower than 5 °C, the remaining water in the equipment and pipelines should be drained to prevent the equipment and pipelines from freezing. 2. Coat the surface of main parts such as bearings with anti-rust oil to avoid corrosion.

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