A pump is a machine for conveying fluid or making a liquid. It transmits the mechanical energy or other external energy of the original to the liquid, which increases the energy of the liquid.

泵主要用来输送水、油、酸碱液、乳化液、悬乳液和液态金属等液体，也可输送液、气混合物及含悬浮固体物的液体。泵通常可按工作原理分为容积式泵、动力式泵和其他类型泵三类。

Pump is mainly used to transport water, oil, acid and alkali, emulsion, suspension emulsion and liquid metal and other liquid, but also transport liquid, gas mixture and liquid containing suspended solids. Pump can be divided into three types of pump, power type and other type of pump.

除按工作原理分类外，还可按其他方法分类和命名。如，按驱动方法可分为电动泵和水轮泵等；按结构可分为单级泵和多级泵；按用途可分为锅炉给水泵和计量泵等；按输送液体的性质可分为水泵、油泵和泥浆泵等。按照有无轴结构，可分直线泵，和传统泵。

In addition to classification by the principle of work, but also by other methods of classification and nomenclature. Such as according to the driving method can be divided into the electric pump and the turbine pump; according to the structure can be divided into single - stage pumps and multi-stage pump; according to use can be divided into the boiler feed pump and the metering pump; may divided into the pump, the oil pump and the mud pump according to the transportation properties of the liquid. In accordance with the structure of the shaft can be divided into linear pump, and traditional pump.
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