Axial flow pump principle:
Instead of relying on the centrifugal force of the impeller on the liquid, the axial liquid pump delivers the liquid by using the impeller of the rotating impeller to flow the liquid to be transported in the direction of the pump shaft. When the axial-flow pump shaft is driven by the motor to rotate, since the vane has a certain helix angle with the axis of the axial-flow pump shaft, thrust (or lifting force) is generated on the liquid to push the liquid out and discharge along the discharge pipe. This is similar to the operation of the electric fan shown in Figure 2-22 where the air near the front of the fan blades is pushed forward by the blades to allow the air to flow. When the liquid is pushed out, the original position will form a partial vacuum, the outside of the liquid under the action of atmospheric pressure will be sucked along the inlet pipe impeller. As long as the impeller is constantly rotating, axial flow pump can continue to inhale and discharge liquid. Axial flow pump features:
1) axial flow pump, simple structure, light weight, small size, its body is tubular, so small footprint.
2) Vertical axial flow pump work, the impeller all submerged in water, do not have to start pumping pump, the operation is simple and convenient.
3) For regulated axial flow pump, when T changes conditions, it can still work under higher efficiency as long as the blade angle is changed.
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