The so-called hydrodynamic sealing impeller pump is installed in the opposite direction near the impeller coaxial open the back cover behind the impeller. When the pump work, Centrifugal oil pump impeller rotation axis of the pair, with the impeller rotating liquid vice, the liquid will produce a turning point in the outward centrifugal force, centrifugal force on the one hand the mechanical seal to withstand the liquid flow, reducing pressure on the mechanical seal. On the other hand, in order to prevent solid particles into the friction medium mechanical seal, mechanical seal grinding block, in order to reduce wear and prolong its life.
In addition to playing the role of auxiliary impeller seal, but also reduce the axial force can play a role in the submersible Submersible sewage pump , mainly in the fluid pressure of gravity on the axial force acting on the impeller and rotating parts, including the role of the two forces the same direction, force is the sum of two forces. Performance parameters in the same case, we can see, submersible sewage pump axial force is greater than the average pump, vertical pumps and difficult difficult balance. Therefore, the submersible sewage pump, the reason is easy to damage the bearings and axial force have a great relationship.
If you installed the auxiliary impeller on Chemical pump , the impeller forces the fluid pressure acting on the direction of Vice is the opposite of these two forces together, this can offset part of the axial force, also played a role in extending bearing life. But the use of sub-impeller seal system also has a drawback, that is to consume energy, typically around 3% of the secondary impeller part, but as long as designed, can reduce this loss to a minimum.
No comments:
Post a Comment