China wholesale Casting Blade - Flagship product fan wheel of centrifugal fan – Aierfu

Product Description

According to the blade angle, the fan wheel of centrifugal fan can be divided into forward inclined fan wheel, radial fan wheel and backward inclined fan wheel; According to the blade angle of the impeller, the centrifugal impeller can be divided into three types: forward inclined impeller, radial impeller and backward inclined impeller; According to the impeller structure, the impeller can be divided into two types: multi wing impeller and split impeller; According to the motor installation requirements, it can be divided into outer rotor impeller and inner rotor impeller.

The forward impeller refers to the impeller whose outlet angle is greater than 90 degrees, which is also called forward impeller. Generally speaking, from the perspective of the radial section of the wind turbine, the included angle between the extension line outside the blade and the reverse tangent of the rotation direction of the blade at this point is an obtuse angle, which is a forward inclined wind turbine. Backward impeller refers to the impeller whose outlet angle is less than 90 degrees, which is also called backward impeller. Generally speaking, from the perspective of the radial section of the wind turbine, the included angle between the extension line outside the blade and the reverse of the tangent line of the rotation direction of the blade at this point is an acute angle, which is a backward inclined wind turbine.

The blades of the multi blade impeller are more than those of the wind turbine, generally more than 30 blades, and they are uniformly distributed outside the upper and lower plates of the impeller in a long strip shape. The edges of the upper and lower plates of the impeller are generally the same.

The blades of the centrifugal wind turbine are generally less than 10, and the sectional area of the blades is much larger than that of the multi wing type, and the structure is much more complex. The impeller suction port is generally made into a convex shape.

The outer rotor impeller refers to the impeller installed on the motor housing. For the motor with such impeller, the shaft does not rotate and the housing rotates.

Contrary to the outer rotor, the inner rotor motor does not rotate because the motor shaft rotates. Therefore, the inner rotor impeller is installed on the motor shaft. Generally, there are shaft sleeves.