1.Positive displacement pump
The principle of oil wells and pump structure
Oil well and pump principle diagram atlas
By working parts of the movement caused by the work of the cyclical increase and decrease the volume of liquid suction, and by the working parts of the squeeze directly to the pressure of the liquid can increase.
According to the movement of different parts of the movement is divided into: reciprocating pump and rotary pump two types. According to the different structure of moving parts are: piston pump and piston pump, gear pump, screw pump, vane pump and water ring pump.
2. Impeller pump
Is driven by the impeller liquid high-speed rotation of the mechanical energy transfer to the liquid delivered. According to the characteristics of the impeller and the flow channel structure of the impeller can be divided into:
1) centrifugal pump
2) axial pump
3) Mixed-flow pump
4) Vortex pump (peripheral pump)
3. jet pump
Is the fluid generated by the high-speed jet fluid, and then by momentum exchange and the fluid is injected to increase the energy.

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