Advantages of centrifugal fan characteristics

With the continuous development of science and technology, a lot of products have appeared, and these products are unanimously welcomed by the public, and the centrifugal fan is also one of the many popular brands. Centrifugal fan is a machinery that relies on the input mechanical energy to improve the gas pressure and send the gas side by side. It is a driven fluid machinery. Centrifugal fans are widely used for ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and air ventilation of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and selection of grains; air tunnel sources and inflation and propulsion of hovercraft. Centrifuge fan is according to the principle of kinetic energy into potential energy, with the use of high-speed rotating impeller to accelerate the gas, and then slow down, change the flow direction, so that the kinetic energy into potential energy (pressure). In a single-stage centrifugal fan, the gas enters the impeller from the axial direction, changes the gas flows through the impeller, and then enters the pressure fier. In the amplifier, the gas changes the flow direction and the pipe section area increases the air flow. This deceleration effect converts the kinetic energy into the pressure energy. The pressure increase mainly occurs in the impeller, followed by the pressure expansion process. In a multi-stage centrifugal fan, a backflow device is used to bring the airflow into the next impeller, creating a higher pressure. The centrifugal fan is a variable flow constant pressure device. When the speed is certain, the pressure-flow theory curve of the centrifugal fan should be a straight line. The actual characteristic curve is curved due to internal losses. The pressure generated in the centrifugal fan is greatly affected by the change in the intake temperature or density. For a given intake, the pressure generated at a very high intake temperature (very low air density) is very low. For a given pressure and flow characteristic curve, there is a power and flow characteristic curve. When the blower is operating at a constant speed, for a given flow rate, the required power increases with the decreasing air inlet temperature.

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