Which is better, impeller, water pump, screw pump?
Impeller pump and screw pump each have their own advantages.Efficiency, impeller pump generally higher than the screw pump;Working pressure, screw pump generally higher than the impeller pump;Work flow, impeller pump generally higher than the screw pump.Working reliability, screw pumps generally better than impeller pumps;
Your question is too general, the two pumps do not matter good or bad, the key lies in the use of parameter requirements. General pumps use more centrifugal pumps, large flow using double suction pump, high lift using multi-stage pump; screw pump is mainly used for high viscosity fluid
Screw pump (screw pump): screw pump is a positive displacement rotor pump, it is to rely on the screw and bushing formed by the volume changes in the sealing chamber to suction and discharge of liquid. Screw pump according to the number of screw is divided into single screw pump, double, three and five screw pump. The characteristics of screw pump is a smooth flow, pressure pulsation, self absorption capacity, low noise, high efficiency, long service life and reliable operation; and its outstanding advantage is not the formation of eddy current, the transmission medium is not sensitive to the viscous medium, which can transport high viscosity medium.
Impeller pump: through the work of the impeller to drive liquid high-speed rotation, the mechanical energy can be transferred to the liquid, so as to achieve the purpose of conveying liquid. Impeller pumps are mainly used to pump liquids with little viscosity. Vane pumps include centrifugal, mixed flow, axial, and vortex.
