Structure and function of the centrifugal pump induction wheel

idler, idler centrifugal pump, the role of the idler

one, the basic theory of centrifugal pump idler

induction centrifugal pump wheel can be used to improve the cavitation performance of a centrifugal water pump, it improve the pump inlet pressure, the pump can be caused by cavitation

loss can not run. Idler is usually installed on the main pump impeller in the upper reaches of an axial flow section. Idler of small Angle of attack and import edge is very thin, so the flow disturbance is small, so you can make the formation of cavitation and its harmful effect on the flow to a minimum. Its role is to make the pressure gradually increase to the desired size.

2, induced centrifugal pump wheel structure and the role of the centrifugal pump idler

centrifugal pump idler of main structure as shown in figure 20 & ndash; 1. Now most of the centrifugal pump idler is figure 20 & ndash; 1 a or figure 20 & ndash; 2 b type that is open, imports edge sweepback, leaf before there is usually a dip. Due to import edge sweepback could lead to import on the axial position is changed, the purpose of the design before the blade Angle is to make the import side of the blade in the same axis plane. Usually take around a few degrees Angle of attack, if the design Angle of attack of 0 & deg; It is also possible on the two alternating oscillation occurs. A few degrees Angle of attack is designed to eliminate the uncertainty and to ensure that cavitation occurs on the underside of the leaves.

induction centrifugal pump wheel is widely used in air conditioning water pump ( Media for the lithium bromide solution) , condensate pumps ( Media for condensate) And aerospace engine fuel pump ( Medium for liquid hydrogen and liquid oxygen, etc. ) Is often used in device evaporation and crystallization separation device is pump, can also be used for hot water circulating pump. The typical advantages of idler after installation as shown in figure 20 a 2. This is a set of installation and no idler process pump cavitation performance comparison chart.

chart for all kinds of centrifugal pump idler structure shape

a) Cylindrical flange hub low-lift idler b) Cylindrical rim conical wheel low-lift idler c) Tapered flange hub low-lift idler d) Closed low-lift idler e) Cylindrical rim conical wheel high-lift idler f) Tapered flange hub high-lift idler

idler physical diagram is as follows:

under normal circumstances, pump equipped with ideal after induction wheel has the advantages of:

1) Make the pump ( NPsH) At least 50% lower;

2) Improve the ability to pump viscous material;

3) Eliminate noise in vacuum applications;

4) To improve the gas phase processing capacity;

5) In the ( NPsH) 。 Insufficient and the application of gas bearing and viscous material, can extend the impeller, pump body and cover plate, etc. The service life of the flow components.

recommended products: no negative pressure water supply equipment

the induction centrifugal pump wheel structure and the role of the centrifugal pump idler technology news articles by professional self-priming pump, original.

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