Xin Feng Classroom | Ventilator Series: Analysis of Fan Failure Causes

01  

Noise Issues  

1. Equipment is not operating at design points; the fan is not functioning at its rated design point. The fan is being forced to operate in an unstable airflow environment.

2. Bearing failure. 3. Excessive voltage or unstable frequency conversion. Adjustable frequency controllers may also cause motor noise. 4. Components installed within high-speed airflow zones, such as airflow sensors or guide vanes, can generate noise. 5. Poor ventilation conditions at the fan inlet. 6. Incorrect noise detection methods.

02

Vibration Issues

1. Misalignment of transmission components.

2. Unstable mounting structure or foundation (resonance).

3. Foreign matter adhering to rotating components.

4. Damage to rotating components (e.g., bearings, shafts, fans, impellers, or pulleys).

 5. Broken, loose, or missing fastening screws. 

6. Loose belts. 

7. Vibration transmission from other equipment. 

8. Water accumulation on airfoil blades. 

9. Fan operating during shutdown or under unstable airflow conditions.    

03 

 Motor Issues   

       1. Wiring errors。

       2. Excessive fan rotational speed.

3. Incorrect component installation causing jamming.

 4. Improper bearing lubrication. 

5. Motor rotational inertia too low to meet operational requirements. 

6. Inappropriate size of protective device.

04

Transmission Issues

1. Improper belt tension.

2. Poor alignment of transmission components.