Fan impeller size is measured by what units?
Fan impeller size used to measure.Decimeter DM, a machine, a decimeter.For example: 5#, diameter of 5 m =500mm, this approach is suitable for the general type of fan;
The high pressure fan is different from the low voltage.For example: 9-19 5#, x1.14 (diameter 5 decimeter fan of this type 14% diffuser area) =5.7.Impeller classificationAccording to the characteristics of air flow, classification is classified according to the impeller form, which can be divided into centrifugal fan, axial fan and mixed flow fan.
(two) centrifugal fan;The direction of the air inlet and the direction of the air outlet of the centrifugal impeller are 90 degrees. Generally applicable to higher pressure, larger air volume occasions.Centrifugal fan: CBD/CFD, BC series, RTC, ISQ, CUS, RSC, ICC and so on. The centrifugal impeller can be divided into front curved impeller, backward tilting impeller and backward curved impeller. 1 、 front curved impeller: the direction of air flow and the angle of the speed of the blade is an acute angle.Features: low speed, large air volume, low static pressure (relative backward tilt, backward bending impeller), forming process is simple, low cost. Front bend impellerToo high speed will cause motor overload, so the fan with front curved impeller is not allowed to run without load.
(1) axial fan;The direction of the inlet of the axial-flow impeller is the same as that of the air outlet. Generally used for large wind, wind pressure of the bottom of the occasion.Axial fans are: RTA/RSA, WEX/WSP, IAS, IAT and so on.The side wall of the axial flow fan (WEX/WSP) large volume, low pressure, low noise, using the forward swept blade.The axial flow fan of the pipeline has large airflow and relatively high pressure. The CAD blade flow field simulation technology is used to optimize the design of the steel blade or import "small whirlwind" impeller.
