What is the function of the guide ring of a backward centrifugal fan?

02/02/2024

The inlet ring (also known as the inlet nozzle or shroud) of a backward centrifugal fan is a component that is installed in the air inlet of the fan and has the following functions:

Guiding the airflow: The inlet ring guides the direction of the airflow at the air inlet of the centrifugal fan, which helps to improve the efficiency of the fan's air intake.

Increase air pressure: The air inlet ring increases the pressure of the air stream, generating higher pressure at the air outlet by changing the flow path and speed of the air stream. This helps to overcome drag and pressure losses in the system, providing stronger wind power.

Noise Reduction: The inlet ring reduces the noise generated when the airflow collides with its surroundings. Directing the airflow more smoothly into the fan inlet reduces the creation of eddies and turbulence, which in turn reduces noise levels.

Improved Efficiency: By optimizing the direction and speed of the airflow, the inlet ring increases the efficiency of the fan. It reduces energy losses and unwanted turbulence, making the energy conversion of the fan more efficient.

Overall, the inlet ring plays a role in backward centrifugal fans in directing, pressurizing, reducing noise and improving efficiency, which is important for optimizing fan performance and application effectiveness.

Advice: Backward centrifugal fans must use inlet rings, otherwise the air pressure will be reduced and air volume will be lost.