Common Issues in Centrifugal Fans: Motor Overload and Bearing Overheating

Excessive Motor Current in Centrifugal Fans
During the operation of a centrifugal fan, ensuring a stable and normal power supply is essential for proper functionality. However, several factors can lead to an increase in motor current:
- Severe vibration of the bearing housing.
- Failure to fully close the intake or exhaust dampers when starting a roots blower.
- Overspeed of the main shaft exceeding the specified standard.
- Low input voltage to the fan motor.
- Single-phase power loss in the motor.
These issues may result in increased motor current, causing a rise in equipment temperature.
Excessive Bearing Temperature in Centrifugal Fans
Overheating of bearings can be attributed to several causes, which can be categorized into four main aspects:
- Excessive or insufficient torque on the bolts connecting the bearing cover and seat.
- Severe vibration of the bearing housing.
- Damage to the rolling bearings of the fan.
- Inadequate lubrication or contamination of the lubricant with impurities.