Vane pump with cylinder profile defined by cycloid curves

摘要

A vane pump comprising a cylindrical rotor provided with a diametrically extending vane groove, a vane slidably arranged in the vane groove in radial directions, a cylinder in which the rotor is rotatably arranged, the cylinder having an inner peripheral cam surface with which said vane always comes into sliding contact at its opposed ends, the cam surface of the cylinder having a profile defined by cycloid curves and/or arc portions which have a radius substantially equal to that of the rotor.