Relying on the movement of the working part, the working volume periodically increases and decreases and the liquid is sucked and discharged, and the pressure of the liquid is directly increased by the pressing of the working part.
According to the different movement modes of moving parts, it is divided into two types: reciprocating pump and rotary pump.
According to the structure of moving parts, there are piston pumps and piston pumps, gear pumps, screw pumps, vane pumps and water ring pumps.
2. The impeller pump
The impeller pump is driven by the impeller to rotate the liquid at a high speed and transfer the mechanical energy to the delivered liquid.
According to the different impeller characteristics of the pump impeller and runner structure, it can be divided into:
1) Centrifugal pump
2) axial pump
3) mixed-flow pump
4) Peripheral pump
3. Jet pump
It is the high-speed jet generated by the working fluid that ejects the fluid, and then the momentum of the ejected fluid is increased by the momentum exchange.