A device for conveying liquid or pressurizing liquid. A pump in a broad sense is a mechanism for conveying fluid or pressurizing it, including some of the machinery for conveying gases. The energy of the mechanical energy or other energy of the prime mover is transferred to the liquid to increase the energy of the liquid.

Water is very important for human life and production. There are various ancient water appliances, such as chain pump in Egypt (before seventeenth Century), China shadoof (before seventeenth Century), Burton (before eleventh Century), water (first Century AD), and third Century BC in ancient Greece Archimedes invented the spiral rod. Around 200 BC, the ancient Greek craftsman Kurt Siby Lucius invented the most primitive piston pump - Fire pump. As early as 1588, there are 4 vane vane pump on the record, after the emergence of a variety of other rotary pump. In 1689, the French D. Papan invented the volute centrifugal pump impeller blade 4. In 1818, the United States appeared with radial straight blades, semi open double suction impeller and volute centrifugal pump. 1840 ~ 1850, the United States H.R. Worthington invented the pump cylinder and steam cylinder opposed to the direct role of the piston pump, marking the formation of modern piston pump. From 1851 to 1875, multistage centrifugal pumps with guide vanes were invented, which made it possible to develop high lift centrifugal pumps. Subsequently, a variety of pumps have come out. With the application of a variety of advanced technology, the efficiency of the pump is gradually improved, the scope and application of the performance is also expanding.