The type and parameter meaning of centrifugal fan 

 One, the type of fan (1) According to the flow direction of the wind in the impeller: centrifugal (wind in the impeller along the radial flow out of the impeller) Axial flow (wind in the impeller along the axial flow out of the impeller) ② According to the number of impeller: single-stage fan (only one impeller) Two-stage fan (with two impellers on the same shaft) ③ According to the number of impeller air inlet: Single inlet (only one inlet) Double air intakes (impeller has two air intakes) ④ According to the wind pressure of the fan: Low pressure fan (full pressure less than 1000Pa) Medium pressure fan (full pressure 1000-3000Pa) High pressure fan (full pressure 3000-15000Pa) ⑤ According to the different uses of the fan: Main ventilator (responsible for the ventilation of the whole mine or an area) Local fan (responsible for driving face or enhancing coal face ventilation) P= outlet pressure: Inlet pressure P<1.1 Fan 1.1<p<4 blower="" p="">4 Compression fan Two, the significance of various fan models 1. Centrifugal fan The significance of centrifugal fan model: It is composed of basic model and supplementary model. If the basic model of the fan is the same but the purpose of the fan is different, add a symbol such as "G" or "Y" before the basic model for convenience. "G" stands for blower (blower) "Y" stands for induced draft fan. The supplementary model consists of two digits. The first digit represents the inlet suction type of the fan, which is represented by "0", "1" and "2", wherein "0" represents the double suction fan; "1" stands for single suction fan; "2" stands for two-stage series fan. The second digit represents the design number. The complete representation of fan model includes: name, model, machine number, transmission mode, rotation direction, outlet position and so on. For example: W9-26№16D The first position represents the use of the fan W high temperature F anti-corrosion B explosion... The second position represents the pressure characteristics of the fan 9 high pressure 8 high pressure 6 medium pressure 5 medium pressure 4 low pressure 3 low pressure The third position joins the symbol The fourth position represents the characteristic ratio of fan pressure to air volume 72 high air volume 68 medium air volume 26 low air volume 19 small air volume 12 small air volume The fifth position mathematical notation The sixth position represents the fan impeller diameter 16 impeller diameter 1.6 meters 12 impeller diameter 1.2 meters 10 impeller diameter 1.0 meters 4-72 No5A Fan model: 4-72 4 represents the pressure coefficient, 72 stands for air volume coefficient No means what number 5 represents the impeller diameter (500mm) A Model of the centrifugal fan directly connected by the motor and the fan, which consists of the basic model and the supplementary model. 2, axial flow fan Axial fan model 200FZY4-D: 200 is the fan model (generally refers to the diameter of the blade),YZFZ in the F- fan,Z- axial fan,Y- cylinder type.4- The performance parameter number of the motor (generally refers to the speed of the motor), that is, we often say the 4-pole motor.