The working principle of centrifugal fan is basically the same as that of turbine compressor, except that the gas flow rate is low and the pressure change is not large. Generally, it is not necessary to consider the change of gas specific volume, that is, treat the gas as an incompressible fluid.
Centrifugal fan can be made into two types of right-handed and left-handed. When viewed from the side of the motor, the impeller rotates clockwise, called the right-handed fan, and counterclockwise, called left-handed.
Application of centrifugal fan:
Centrifugal fans are widely used in industrial machinery such as plastic machinery, UV equipment, packaging machines, shrinking machines, hot air ovens, film exposure machines, film presses, large printing machines and other machinery for drying, heat supply, heat dissipation, etc.; also available It is used for air conditioning, cooling and heating circulation, exhaust air, ventilation and other purposes in cooling and heating equipment, frozen food machinery, general factories, sterile rooms, etc.; it can also be used for kitchen fume exhaust equipment, room ventilation equipment; it can also be used for aeration equipment, and the function is equivalent Extensive and diverse.
Performance characteristics of centrifugal fan:
Centrifugal fan is essentially a variable flow constant pressure device. When the rotation speed is constant, the pressure-flow theoretical curve of the centrifugal fan should be a straight line. Due to internal losses, the actual characteristic curve is curved. The pressure generated in the centrifugal fan is greatly affected by the temperature or density of the intake air. For a given intake air volume, the pressure generated at the highest intake air temperature (lowest air density) is the lowest. For a given pressure and flow characteristic curve, there is a power and flow characteristic curve. When the blower is running at a constant speed, for a given flow rate, the required power increases as the intake air temperature decreases.
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