60mm 65mm Machined Impeller

Titanium blade shapes of centrifugal fan impellers are veneer type, arc type and wing type. Airfoil blades have good aerodynamic characteristics, high efficiency, good strength and high rigidity. The disadvantages are that the manufacturing process is complicated, and when the gas containing a high concentration of dust is transported, the blade is easy to wear. After the blade is worn through, impurities enter the inside of the blade, causing the impeller to lose balance and generate vibration. The flat straight blade is simple to manufacture, but the flow characteristics are poor. Compared with the airfoil blade, the flat curve backward blade has lower efficiency near the highest efficiency point, and the efficiency at other operating conditions is quite close.

Forward impeller

Forward impellers generally use arc-shaped blades. but reagrding the backward impellers, large-scale fans mostly use airfoil blades. For coal-fired boiler induced draft fans with low dust removal efficiency, arc-shaped or flat blades can be used. There are many centrifugal fans using flat blades.