Centrifugal fan impeller refers to the the wind wheel with axial air inlet and radial air outlet, which uses the centrifugal force (depending on the speed and its outside diameter) to work and makes the air improve the pressure. First, the centrifugal fan impeller includes forerake centrifugal fan impeller, refers to the impeller outlet angle is greater than 90 degrees.
From the radial section of the wind wheel, the angle between the outer spur line of the centrifugal fan impeller and the tangential direction of the rotation direction of the blade is an obtuse angle. The hypsokinesis centrifugal fan impeller refers to the backward impeller with an outlet angle of less than 90 degrees. From the radial section of the wind wheel, the angle between the outer spur line of the blade and the tangential reverse of the rotation direction of the blade is an acute angle.
Multiple wing type centrifugal fan impeller have more blades than the rotor blades. When it is more than 30 pieces, they will be long strip evenly distributed on the impeller of the lower plate. The edge of the impeller upper and lower plate is same.
The rotor blade of the centrifugal fan impeller is generally within 10 pieces, and the section area of the blade is much larger than the multiple wing type, and the structure is more complex. Impeller inlet scoop is usually directly made into the shape of the bulge.
In contrast to the outer rotor, the inner rotor motor is rotated by the motor drive shaft and the outer shell does not rotate. It is because of this that the inner rotor impeller of the centrifugal fan impeller will be installed on the motor drive shaft. There will always be a shaft sleeve. The shaft sleeve is generally 14 mm and the motor drive shaft is 14 mm.