Submersible sewage pump sealing technology

Vice impeller submersible sewage pump sealing technology of the so-called hydrodynamic seal is near the back of the pump impeller HouGaiBan coaxial install a open impeller in the opposite direction. When the pump work, vice impeller with pump shaft rotation, the deputy impeller together with the liquid will be rotate, rotating liquid will produce an outward centrifugal force, the centrifugal force on the one hand, standing up to the liquid flow to the mechanical seal, reduces the pressure of the mechanical seal. Solid particles on the other hand to stop the medium into mechanical seal friction pair, reduce the wear of mechanical seal grinding block, prolong its service life. Vice impeller besides sealing effect, still can rise to reduce the effect of axial force, the submersible sewage pump axial argued that if the role of the liquid in the differential pressure force on the impeller and the rotating part of the force of gravity, the role of the two forces direction is the same, the resultant force is composed of two forces combined. As you can see, in the case of performance parameters of the same, the submersible sewage pump axial force is bigger than the general horizontal pump, and balance the difficulty is harder than the vertical pump. So in the submersible sewage water pump, bearing is easy to damage the reason also has a lot to do with large axial force. And if installed vice impeller, liquid on the role of the vice impeller of differential pressure force direction is in contrast to the composition of the two forces, so that we can offset part of the axial force, also have the effect of the extend bearing life. But using vice impeller sealing system also has a drawback, that is on the vice impeller part consumes energy, usually at around 3%, but as long as reasonable design, this part can reduce the loss to the minimum.
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