What can be done if the fan vibrates heavily?
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The fan installed in a horizontal heat exchanger housing experiences significant vibration. Are there any ways to reduce this vibration? Does a vertical fan have less vibration, or is it the horizontal fan that has less vibration? Please advise
The impeller of the fan needs to be dynamically balanced.
The heat-exchanging water vapor will condense inside the fan, forming condensed water. When the fan is in operation, its blades come into contact with condensate water, which can affect its proper functioning; it is recommended to install a drainage guide at the bottom of the fan. And regularly check whether there is any liquid impact deformation of the blades
Possible solutions include: 1. Draining or removing the scale buildup on the impeller. 2. The bearing clearance is large; replace the bearing. 3. The impeller has poor balance and requires dynamic balancing. 4. If connectors such as bolts are loose or the welding joints have come apart, take appropriate action. 5. Check whether the vibration damping pads of the fan base are functioning properly. 6. If none of the above conditions apply, reducing the rotational speed appropriately with permission can have some effect.
The key is to first identify the root cause of the vibration, so that targeted measures can be taken to eliminate it. Generally speaking, the most common cause of vibration is vibration in the fan resulting from dust accumulation or corrosion on the impeller.
Vibration can certainly be reduced, but first an analysis must be conducted to identify the cause so that appropriate measures can be taken.
Is your fan connected directly, via a coupling, or by a V-belt drive? Is it forced air or induced air? The main problem with fan vibration lies in the impeller – when it cannot achieve dynamic balance, the vibration becomes severe. In such cases, the fault must be resolved as soon as possible depending on the specific installation and usage conditions; otherwise, accidents are likely to occur
The impeller can be cut, and the outlet can also be enlarged; loop pipelines or alternative pipelines can be used for loop regulation to increase the outlet pressure resulting from the enlarged outlet. The impeller should be cleaned as well.
It could be that the bolts securing the drive motor or fan are loose, or it might be due to excessive misalignment of the fan’s coupling. Also, the impeller needs to undergo a balancing test.
Yes, fan vibration is mainly caused by the impeller.
Identifying the cause and taking appropriate action is the right approach.