Snail-type centrifugal fan

The snail-type centrifugal fan typically refers to a centrifugal fan, named for its housing shape resembling a snail, and is a common ventilation device.


The following is a detailed introduction to the snail-type centrifugal fan:

Working Principle

The snail-type centrifugal fan operates on the principle of converting kinetic energy into potential energy. It uses a high-speed rotating impeller to accelerate the gas, then decelerates and changes the flow direction, converting kinetic energy into potential energy (pressure). When the motor drives the impeller to rotate, the air inside the impeller is subjected to centrifugal force and is thrown toward the edge of the impeller, creating a negative pressure at the center. External air is drawn into the center of the impeller under atmospheric pressure, then gains energy and is transported outward as the impeller rotates.

Structural Components

- Impeller: The core component of the centrifugal fan, consisting of blades, front disc, rear disc, etc. The shape and angle of the blades significantly affect the fan's performance.

- Housing: Usually made of steel plate, it houses the impeller and other components and guides the airflow. The housing is typically snail-shaped, hence the name snail-type centrifugal fan.

- Inlet: Used to draw gas into the fan. The shape and size of the inlet also affect the fan's performance.

- Outlet: Used to discharge the pressurized gas from the fan. The shape and size of the outlet also influence the fan's performance.

- Transmission Device: Includes the motor, coupling, pulley, etc., used to transfer power from the motor to the impeller. The performance of the transmission device directly affects the fan's operational efficiency and stability.

- Bearings and Sealing Devices: Used to support the impeller and prevent gas leakage. The quality of bearings and sealing devices also impacts the fan's operational reliability and lifespan.

Performance Characteristics

- High Efficiency and Energy Saving: The snail-type centrifugal fan adopts an efficient impeller design, providing high airflow and pressure with low power consumption, thereby achieving energy savings.

- Low Noise: The snail-type centrifugal fan utilizes advanced noise reduction technologies, such as optimized impeller design and added silencers, effectively reducing operational noise.

- Stable Operation: Made from high-quality materials and advanced manufacturing processes, the snail-type centrifugal fan ensures stability and reliability during prolonged operation.

- Easy Maintenance: The simple structure of the snail-type centrifugal fan makes maintenance easy, requiring only regular cleaning and upkeep.

- Wide Range of Applications: The snail-type centrifugal fan is suitable for various industrial and civil applications, such as ventilation, air conditioning and refrigeration, and exhaust gas treatment.

Application Areas

The snail-type centrifugal fan is widely used in factories, mines, tunnels, cooling towers, vehicles, ships, and buildings for ventilation, dust removal, and cooling; ventilation and induced draft for boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and conveying of grains; inflation and propulsion for wind tunnels and air cushion vehicles.