A water pump is a machine that transports or pressurizes a liquid. It transmits the mechanical energy or other external energy of the prime mover to the liquid, so that the liquid energy increases, and is mainly used to transport liquids including water, oil, acid and alkali, emulsion, suspension emulsion and liquid metal.
It can also convey liquids, gaseous mixtures and liquids containing suspended solids. The technical parameters of water pump performance include flow, suction stroke, head, shaft power, water power, efficiency, etc., which can be divided into volumetric water pump, vane pump and other types according to different working principles. Positive displacement pumps use the change of the volume of their studios to transfer energy, and vane pumps use the interaction between rotary blades and water to transfer energy, and there are types of centrifugal pumps, axial flow pumps and mixed-flow pumps.