How does a
vane pump work?
Vane pumps operate according to the displacement principle. They consist of a stator (housing) in which an eccentrically arranged rotor with radially arranged and radially movable vanes rotates. The vanes are pressed against the inner wall by centrifugal force as well as by the operating pressure to which they are subjected. This creates chambers or cells which are sealed against each other, and which change their volume during one rotor rotation due to the eccentricity of the rotor to the stator. As the cell volume increases, the pump draws in liquid/fuel and then displaces it into the discharge line as the cell volume decreases. The degree of eccentricity of rotor to stator determines the possible displacement volume per revolution.