Rotary pumps are divided into gear pumps, screw pumps, rotary piston pumps (cam pumps, Roots pumps), flexible impeller pumps, sliding vane pumps, hose pumps, etc. Gear pump is mainly composed of gear, shaft, pump body, pump cover, bearing sleeve, shaft end seal and so on. A rotary pump that relies on the change and movement of the working volume formed between the pump body and the meshing gear to transport liquid or pressurize it.


