What is a pump?

1. The pump is mainly used to transport liquids such as water, oil, acid-base liquid, emulsion, suspension emulsion and liquid metal. The gear oil pump can also transport liquid, gas mixture and liquid containing suspended solids.
2. Pumps can usually be divided into three categories: positive displacement pumps, dynamic pumps and other types of pumps according to their working principles. In addition to being classified by working principle, submersible pumps can also be classified and named by other methods. For example, according to the driving method, it can be divided into electric pump and turbine 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; Water pump, oil pump and mud pump, etc.
3. There is a certain interdependence between the performance parameters of the pump, which can be represented by a curve, which is called the characteristic curve of the pump, and each pump has its own specific characteristic curve. A pump is a machine that transports or pressurizes a liquid. It transfers the mechanical energy of the prime mover or other external energy to the liquid, making the liquid energy increase.