A centrifugal fan is a fluid machine that relies on the high-speed rotation of an impeller to generate centrifugal force, drawing gas in axially and discharging it radially while increasing its pressure.
Core Structure & Components
| Component | Function | Features |
| Impeller | Core energy conversion component | Composed of blades, front disc, back disc, and hub; determines fan performance and efficiency |
| Volute | Collects airflow and converts energy | "Snail shell" shape; converts dynamic pressure to static pressure, increasing air pressure |
| Inlet Cone | Guides airflow uniformly into the impeller | Typically conical-arc shaped |
| Drive System | Connects motor to impeller | Includes main shaft, bearing housing, belt pulley (or coupling) |
| Cutoff | Prevents gas recirculation | Located at the volute outlet; affects noise level and efficiency |
Application Fields
1. Industrial Ventilation:
- Factory workshop air exchange, boiler forced draft/induced draft, industrial furnace ventilation
- Metallurgical industry: blast furnace blowing, flue gas treatment, waste heat recovery
2. Environmental Engineering:
- Dust collection systems: cement plants, mines, power plants – dust collection and conveying
- Exhaust gas treatment: gas conveying for desulfurization, denitrification, and VOCs treatment systems
3. Building & HVAC:
- High-rise building ventilation, commercial complex HVAC systems, underground garage ventilation
- Hospitals, office buildings, and other noise-sensitive environments (forward-curved blade fans or EC fans preferred)
4. Special Applications:
- Fire smoke exhaust (requires high-temperature resistance up to 280°C and above)
- Kitchen exhaust / range hood systems
- Powder material conveying
