Brief Analysis by Fan Manufacturer on Resonance Occurrence of Fasteners for Forward-curved Centrifugal Fans

Causes of Resonance on Fan Fixing Parts

1. Insufficient mass and excavation depth of the concrete foundation, or inadequate foundation dimensional design. This leads to separation between the fan base and concrete foundation, loose foundation bolts and under-tightened frame fasteners, resulting in insufficient overall foundation rigidity.

2. Insufficient structural rigidity of the forward-curved centrifugal fan itself or its casing.

3. The inlet and outlet pipelines connected to the fan are not equipped with supporting brackets or flexible connectors.

4. Adjacent equipment is installed too close to the fan base, or the adjacent structures themselves have insufficient rigidity.

Corresponding Countermeasures