What is the shape of blade section of fan impeller?
2. centrifugal fan works by centrifugal force generated by rotating blades. The blades of the centrifugal fan can be divided into three forms: back bending, front bending and radial direction according to the size of the installation angle of the outlet fan. The bending direction after the bent blade and impeller rotating in the opposite direction, exit angle less than 90 degrees; exit direction of radial vane radial outlet angle equal to 90 degrees; the bending direction of the bent blade and impeller rotation in the same direction, export installation angle greater than 90 degrees. Cross sectional view:
The 1. axial fan blades work in the same way as the wings of an airplane. Blade, organic airfoil, arc shape and so on. The cross section of axial fan is generally wing section. As shown:
The impeller blade section of different fans is different.The fan is divided into axial flow fan, centrifugal fan and oblique flow (mixed flow) fan according to the flow direction of air flow into impeller.
