Working Principle of Axial Flow Fans:
When the impeller rotates, gas enters the impeller axially from the inlet and is pushed by the blades, increasing the gas's energy before it flows into the guide vanes. The guide vanes convert the deflected gas flow into axial flow, introducing the gas into the diffuser, which further converts the kinetic energy into pressure energy, ultimately directing it into the working pipeline.
The working mode of axial flow fan blades is similar to that of aircraft wings; however, the latter generates lift to support the aircraft's weight, while axial flow fans remain fixed and move the air.
The cross-section of an axial flow fan generally resembles a wing section. The blades can be either fixed or rotated around their longitudinal axis, and the angle or spacing between the blades and the airflow can be non-adjustable or adjustable. Changing the blade angle or spacing is a key advantage of axial flow fans: a smaller angle produces lower flow rates, while increased spacing results in higher flow rates. Advanced axial flow fans can adjust blade spacing during operation, changing the flow rate accordingly; this is known as a Variable Vane (VP) axial flow fan.
Axial flow fans, also known as local ventilation fans, are commonly used in industrial and mining enterprises. Unlike general fans, both the motor and fan blades have a cylindrical shape designed for local ventilation. They are easy to install, provide effective ventilation and air exchange, are safe, and can be connected to a duct to deliver air to designated areas.
