Basic knowledge of pump

What is a pump?

A pump is a machine that delivers or pressurizes liquid. It transmits the mechanical energy or other external energy of the prime mover to the liquid, so as to increase the liquid energy.

The pump is mainly used to transport water, oil, acid and alkali liquid, emulsion, suspending emulsion and liquid metal, and also can transport liquid, gas mixture and liquid containing suspended solids.

Pumps can be generally divided into three types according to the working principle: positive displacement pump, power pump and other types of pumps. Besides classification according to working principle, it can also be classified and named according to other methods. For example, according to the driving method, it can be divided into electric pump and hydraulic pump; according to the structure, it can be divided into single-stage pump and multi-stage pump; according to the purpose, it can be divided into boiler feed pump and metering pump; according to the nature of liquid delivery, it can be divided into water pump, oil pump and mud pump.

There is a certain interdependence between the performance parameters of the pump, which can be expressed as a curve, called the characteristic curve of the pump. Each pump has its own specific characteristic curve.