Definition: It is a machine with a rotating axis equipped with two or more leaves to promote the airflow.There are three main compositions: impeller (also known as turbine or rotor), shell and driving equipment.
Generally, there is no main component of the fan without direct motors: wind wheels, cases, frames, bearing, shafts, wind flanges (partial), the wind wheels, bearing, and shaft are key components. Special attention is required.
Fans performance parameters: air volume, static pressure, dynamic pressure, power, efficiency, static pressure efficiency, etc., performance curves: Q (air volume) -1 (efficiency), P (pressure, including dynamic pressure, static pressure) -a (air volume)Wait, the PST (Static Pressure) One 0 (Weeton) curve is the most important performance curve of a fan, and it is also the most important basis for the fan selection.
Types of fan: centrifugal type, axial flow, and flow.
Centrifugal type: The air enters the axial direction, the radial is blowing out, the air volume is large, and the pressure is high;
Axial flow: the air enters the axial direction, the axial direction is blown out, the air volume is large, and the pressure is small;
Flow type: The air is two -in -two in the fan, the radial is expelled, and the radial is expelled. The air volume is small, the pressure is small, and the noise is low.