Centrifugal impeller, as an important part of centrifugal fan, immediately endangers the application efficiency of centrifugal fan. Its geometry, specification, number of leaves and manufacturing accuracy do great harm to its characteristics. The centrifugal impeller can ensure the stable rotation of the exhaust fan only through static balance or rotor dynamic balance calibration. According to the direction of leaf inlet and outlet, the centrifugal impeller is divided into three forms: front, shaft and rear. The blade top of the forward centrifugal impeller is inclined to the rotation direction of the centrifugal impeller. The blade top axis of the centrifugal impeller is divided into straight blade type and graphic blade backward centrifugal impeller. The blade top of the centrifugal impeller is inclined to the reverse rotation of the centrifugal impeller.
Centrifugal fan is a common type of centrifugal fan in modern society. Centrifugal fan plays a ventilation effect in daily life, which is of great practical significance to everyone's production, manufacturing and daily life. It is an integral part that can not be ignored. Generally, the key of ordinary centrifugal fan is a part of centrifugal impeller and shell. The setting parts are different, and the models and specifications are also different, But the basic concepts are similar.
General equipment must be inspected and cleaned after being used for a period of time. Cleaning is very inconvenient, but the inspection and cleaning of centrifugal fan is very convenient. Some models of centrifugal fan are equipped with cleaning door, so it does not need to be disassembled during inspection, saving time and labor. The natural ventilation effect of centrifugal fan is also very good, especially suitable for pipe exhaust and exhaust. Moreover, the design of centrifugal fan impeller is effectively backward inclined, with no friction during operation, very low noise, not easy to adhere to dust, and very convenient maintenance. The most satisfactory thing is that the surface coating of centrifugal fan is solved, with strong oxidation resistance, strong corrosion resistance of shell and centrifugal fan, and very strong gas in the application range of shell and centrifugal fan.
Centrifugal fan can form left-handed body and left-handed body. From one side of the motor, the centrifugal impeller rotates clockwise, which is called right-hand centrifugal fan, and the centrifugal impeller rotates reversely, which is called left-hand centrifugal fan. Small and medium-sized centrifugal fans are essentially variable total flow constant current source equipment. When the speed ratio is constant, the basic theoretical diagram of working pressure total flow of centrifugal fan shall be parallel. The specific characteristic diagram is bent due to internal damage. The working pressure of centrifugal fan is greatly endangered by the change of inlet temperature or relative density. For the given intake air volume, the working pressure at the maximum inlet temperature (minimum air density) is the lowest. For the given working pressure and total flow characteristic diagram, there are output power and total flow characteristic diagram. When the fan motor operates at a certain frequency, it is necessary to reduce the given intake air temperature for the given intake air temperature.
