Pump is to transport fluid or pressurized fluid machinery. It will prime mover mechanical energy or other external energy to the liquid, so that the liquid energy increases. Stainless steel gear pump mainly used to transport water, oil, acid and alkali liquid, emulsion, suspended emulsion and liquid metal and other liquids, also can transport liquid, gas mixture and liquid containing suspended solids.
Pumps can usually be divided into positive displacement pumps, power pumps and other types of pumps according to the working principle. In addition to the working principle of classification, but also according to other methods of classification and naming. For example, according to the driving method can be divided into electric pump and hydraulic pump; According to the structure can be divided into single stage pump and multistage pump;
According to the use can be divided into boiler feed water pump and metering pump; According to the nature of the liquid can be divided into water pumps, oil pumps and mud pumps. According to the shaft structure, can be divided into linear pump, and traditional pump. Water pump can only transport fluid as the medium of logistics, can not transport solids.
According to the pumps working principle
1. Positive displacement pump
The working volume increases and shrinks periodically by the movement of the working parts, and the liquid pressure can be increased directly by the extrusion of the working parts.
According to the different ways of moving parts, it can be divided into two categories: reciprocating pump and rotary pump.
According to the structure of the moving parts are different: piston pump and piston pump, gear pump, screw pump, vane pump and water ring pump.
2. Impeller pump
Impeller pump is driven by the impeller liquid high-speed rotation and mechanical energy transfer to the delivery of the liquid.
According to the pump impeller and flow channel structure characteristics of different impeller type can be divided into:
1) centrifugal pump
2) axial flow pump
3) Mixed flow pump
4) Vortex pump
3. Jet pump
It is by the high speed jet generated by the working fluid ejection fluid, and then through the momentum exchange to increase the energy of the ejection fluid.
The pump can also be divided into:
1) the vertical pump
2) the horizontal pump
According to the number of suction ports:
1) single suction pump
2) double suction pump
According to the prime mover driving the pump:
1) electric pump
2) Steam turbine pump
3) Diesel pump
4) pneumatic diaphragm pump