Structural type: Cantilever type, belt drive structure, the belt pulley is installed in the middle of two supporting bearings, and the impeller is cantilevered at the other end of the shaft.
Advantage: The fan speed can be chosen from a wide range, the flow is closer to the application needs, the motor installation position is more flexible, and it occupies less space.
Disadvantage: Relatively lower mechanical efficiency, difficult to disassemble the belt pulley. The belt drive requires tension, which adds extra lateral force to the fan shaft end, there are more easily damaged parts, and the frequency of updates and maintenance is high.
Main Application: Suitable for medium-sized and above fans with a large range of performance variations, rarely used.