impeller

An impeller is a rotating component, often a rotor with vanes, used to impart motion to a fluid or gas. In engineering, impellers are a key part of centrifugal pumps, where they spin to throw fluid outwards from the center into a casing. This action increases the fluid's pressure and forces it out of the pump.12

Centrifugal pumps, which utilize impellers, are widely used for tasks such as water supply, irrigation, and sewage disposal. They can also function as gas compressors. The pressure generated by a centrifugal pump can be further increased by connecting multiple impellers in a system, creating a multistage pump.2