Type A: Cantilever structure without bearings. The fan impeller is directly mounted on the motor shaft, and the fan’s rotational speed matches that of the motor. This design is suitable for small centrifugal fans, offering a compact structure and a small footprint.
Type B: Cantilever structure with a belt-driven system. The pulley is positioned between two bearing seats. This type is used for medium to large centrifugal fans with variable rotational speeds.
Type C: Cantilever structure with a belt-driven system. The pulley is mounted outside the two bearing seats. Suitable for medium to large centrifugal fans with variable rotational speeds, it features easy pulley disassembly.
Type D: Cantilever structure with a coupling drive system. The fan and motor shafts are connected via a coupling located outside the two bearing seats. The fan’s rotational speed matches that of the motor. This type is applied to medium to large centrifugal fans.
Type E: Belt-driven system with two bearing supports located on either side of the fan casing, placing the impeller between the bearings. This dual-support structure has the pulley on one side of the fan and is ideal for double-inlet or large single-inlet centrifugal fans with variable rotational speeds. Its main advantage is balanced operation.
Type F: Coupling drive system with two bearing supports located on either side of the fan casing. The coupling is positioned outside one of the bearing seats. This dual-support structure is suitable for double-inlet or large single-inlet centrifugal fans with rotational speeds matching the motor. Its primary advantage is stable operation.
