Principle of rotary pump

A rotary purump is a type of pump that changes the working volume by the relative motion between the rotor and the pump body, thereby increasing the energy of the liquid. It is a rotary positive displacement pump with positive displacement properties, and its flow rate does not vary with changes in back pressure. A rotary pump consists of a stationary pump casing and a rotating rotor, without suction and discharge valves. The energy is directly applied to the liquid in the form of static pressure by the side of the rotor in contact with the liquid inside the pump body, and the liquid is discharged through the squeezing effect of the rotating rotor. At the same time, space is left on the other side to create low presse, allowing the liquid to be continuously sucked in. The pressure head of a rotary pump is relatively high, the flow rate is usually small, and the discharge is uniform. It is suitable for conveying liquids with high viscosity, lubricity, but without solid particles. The classification of rotary pumps includes gear pumps, screw pumps, slide pumps, etc. Their working principles are similar, but they each have different characteristics