A centrifugal blower is a mechanical device that increases gas pressure and transports gas by rotating blades. Centrifugal blowers are widely used in ventilation, exhaust, and pneumatic conveying. They primarily rely on centrifugal force to draw external gas into the center of a rotating impeller. As the gas leaves the impeller blades, its velocity increases, converting kinetic energy into static pressure energy. Then, with the increased pressure of the fluid, the static pressure energy is converted back into velocity energy, thus delivering the gas into pipes or containers.
Centrifugal Blower Faults and Troubleshooting
*Centrifugal Fan High Bearing Temperature Possible Causes:
1. Excessive grease - Replace grease;
2. Burn marks on the bearing - Replace the bearing;
3. Poor alignment - Realign;
4. Vibration in the unit - Spectrum vibration measurement
*Centrifugal Fan Abnormal Rotation Sound Possible Causes:*
① Stator/rotor friction - Disassemble and inspect;
② Impurities sucked into the fan - Clean;
③ Damaged gear ring in the gear coupling - Replace;
④ Damaged inlet blade tie rod - Re-fix;
⑤ Surge - Adjust airflow;
⑥ Damaged bearing - Replace
*Centrifugal Blower Unit Vibration Possible Causes:
① Rotor imbalance - Perform dynamic and static balancing;
② Rotor scaling - Clean;
③ Blower fan main shaft bending - Correction;
④ Centrifugal blower fan seal clearance too small, wear - Replace or repair;
⑤ Centrifugal blower fan misalignment - Realign;
⑥ Centrifugal blower fan bearing housing clearance too large - Adjust;
⑦ Centrifugal blower fan rotor rubbing against housing - Disassemble and adjust;
⑧ Centrifugal blower fan foundation subsidence or deformation - Reinforce;
⑨ Centrifugal blower fan coupling wear or tilt - Replace or repair.
⑩ Centrifugal blower fan piping or external factors - check supports
Analysis of phenomenon four: Possible causes of reduced performance of industrial centrifugal fan
① Decreased industrial centrifugal fan speed - check power supply;
② Impurities stuck to the industrial centrifugal fan impeller - clean;
③ Malfunctioning industrial centrifugal fan inlet blade control - check and repair;
④ Clogged industrial centrifugal fan inlet silencer filter - disassemble and clean;
⑤ Excessive dust accumulation inside the industrial centrifugal fan casing - clean;
⑥ Leaking industrial centrifugal fan shaft seal - replace or repair;
⑦ Poor sealing of industrial centrifugal fan inlet and outlet flanges - replace gaskets.
