A water pump is a machine that transports or pressurizes liquid. It transfers the mechanical energy or other external energy of the prime mover to the liquid, which increases the energy of the liquid. Mainly used for conveying liquids, including water, oil, acid-base liquid, emulsion, suspension emulsion and liquid metal.
It can also transport liquids, gas mixtures and liquids containing suspended solids. The technical parameters of pump performance include flow rate, suction range, lift, shaft power, hydraulic power and efficiency. According to different working principles, it can be divided into positive displacement pump and vane pump.
Positive displacement pump uses the change of its working chamber volume to transfer energy, and vane pump uses the interaction between rotating blades and water to transfer energy, including centrifugal pump, axial flow pump and mixed flow pump.