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Structure and Performance of Cabinet Centrifugal Fans

Cabinet centrifugal fans are widely used in many production and industrial environments due to their efficient airflow performance and reliable stability. To ensure the fan operates efficiently, it is essential to design its components properly, ensuring quality, aesthetic appeal, and the ability to replace similar fans. Their unique design is key to successful industrial production.

Main Components of Cabinet Centrifugal Fans:

  1. Collector
  2. Insert
  3. Casing
  4. Reel
  5. Regulating Valve
  6. Bearing Box

Working Principle and Structural Characteristics:

  1. Impeller Shape and Efficiency

    • The performance and efficiency of the fan are mainly determined by the shape, size, swirl, and the design of the air intake. The impeller is responsible for drawing air into the fan and driving airflow.

  2. Cyclone Effect

    • The cyclone directs the airflow from the impeller to the exhaust outlet. During this process, the dynamic pressure energy obtained by the impeller is converted into static pressure energy, forming the required wind pressure.

  3. Regulating Valve Design

    • The regulating valve typically uses petal-shaped blades and can adjust airflow from fully open to fully closed. The position of the valve handle should align with the intake direction and the impeller’s rotation direction.

  4. Regulating Valve Installation Considerations

    • Check if the direction of the regulating valve blades is correct during installation to ensure the intake direction matches the impeller’s rotation.
    • For left-side cabinet fans, the regulating valve pulls from top to bottom, from fully closed to fully open.
    • For right-side cabinet fans, the regulating valve pushes from bottom to top, from fully closed to fully open.

  5. Collector and Insert Clips

    • The gap between the collector and insert clip should be cylindrical to ensure smooth fluid flow.

Impeller Types and Design:

  • Backwards-curved blades
  • Radial blades
  • Forwards-curved blades

Impeller Components:

  • The impeller is the core component of the fan, consisting of front and rear plates, connecting blades, and the hub. It is responsible for driving the air movement.

Maintenance and Use:

To extend the lifespan and improve the efficiency of the fan, regular maintenance is crucial. Proper inspection and upkeep during daily use will prevent installation or maintenance issues caused by poor design.