Structure:

cantilever type, belt drive structure, belt pulley is installed in the middle of the two supporting bearings, impeller cantilever is installed at the other end of the shaft.

Advantages:

fan speed can be selected in a wide range, the flow is closer to the application needs, the installation position of the motor is more flexible, less space.

Disadvantages:

mechanical efficiency is relatively low, pulley disassembly is difficult. Belt transmission needs tension force, increase additional lateral force to the fan shaft end, more easily damaged parts, high frequency of update and maintenance.

Main application:

suitable for medium and above and the performance of a wide range of fan, rarely used.