A centrifugal fan consists of four parts: impeller, casing, air inlet, and transmission part. This entry also provides the main technical parameters of centrifugal fans. The centrifugal fan is mainly composed of impeller, casing, air inlet, and other parts equipped with a direct connected motor. 1) The impeller consists of 10 backward inclined circular arc thin plate blades, a curved front plate, and a flat rear plate. All are made of steel plates and have undergone dynamic and static balance correction, resulting in good air performance, high efficiency, and smooth operation. 2) The casing is made into two different types. A type of casing as a whole cannot be disassembled. A type of casing system with three openings, in addition to being divided into two halves along the horizontal plane of the midpoint, the upper half is vertically divided into two halves along the centerline and connected with bolts. 3) The air inlet is made into a whole and installed on the side of the fan. The section parallel to the axial direction is in a curved shape, allowing gas to enter the impeller smoothly with minimal loss. 4) The transmission part consists of a spindle, a bearing box, rolling bearings, and a pulley
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