Multistage centrifugal pump impeller at all levels the same? If the same, the liquid lift and kinetic energy increase? Hope your predecessors advice. Thank you
Therefore, after two impeller mechanical energy conversion energy supplement, flow through the two stage impeller after the energy for the two stage impeller energy sum. It has nothing to do with the size of B1 and B2 of two stage impeller. For example, like a ball, add a force to scroll, plus one force.
From the point of view of fluid mechanics, the pump pressure fluid is the result of mass force and surface force. According to the energy equation, the kinetic energy, the pressure energy and the potential energy are transformed into each other and the energy is conserved in the flow process, i.e. kinetic energy + pressure energy + potential energy = constant. Therefore, after passing through the impeller of the first stage, the fluid has a certain energy to reach the two stage impeller. Because of the change of the section area, the flow velocity and the pressure change, but the energy conservation can not change
The multistage centrifugal pumps have the same impellers at all levels, and the secondary impellers carry out superposed pressure on the output pressure of the upper impellers. For example, 150QJ20 multi-stage submersible pump, single-stage lift 20 meters, the first stage impeller output pressure of 20 meters, second stage impeller inlet pressure of 20 meters, after second stage impeller, the pressure superimposed to 40 meters.
