1.A type: Cantilever type, without bearing, the fan impeller is directly mounted on the motor shaft, and the speed of the fan is the same as that of the motor. It is suitable for small centrifugal fans with compact structure and small body.
2.B type: Cantilever type, with transmission structure, the pulley is installed between the two supporting bearing seats. It is applied to centrifugal fans of medium size and above with variable speed.
3.C type: cantilever type, with transmission structure, the pulley is installed on the outside of the two supporting bearings. It is suitable for centrifugal fans of medium size and above with variable speed, and the pulley is easy to disassemble.
4. D type: Cantilever type, a transmission structure that uses a coupling to link the main shaft of the fan and the motor. The coupling is installed on the outside of the two supporting bearing seats, and the speed of the fan is the same as that of the motor. Applicable to medium and larger centrifugal fans.
5. E type: belt drive structure, two support bearing seats are installed on both sides of the casing, that is, the impeller is placed in the middle of the two support bearings, which is a two-support type, and the pulley is installed on one side of the fan. It is suitable for double suction or large single suction centrifugal fan with variable speed, and its advantage is that the operation is relatively balanced.
6. F type: a transmission structure that uses a coupling to link the main shaft of the fan and the motor. The two support bearings are installed on both sides of the casing, which is a two-support type, and the coupling is installed on the outside of a bearing seat. It is suitable for centrifugal fans with double suction or large single suction and the speed is the same as that of the motor. The advantage is that the operation is relatively stable.