Vane cell pump/motor

A vane pump/motor having a stator (16) and a rotor (10) linked to a drive shaft (12), said rotor being mounted eccentrically in a cylindrical rotor chamber (15) of the stator (16), said chamber having an intake and an exhaust, with the rotor having angularly-spaced radially-movable plate-like rotor vanes mounted thereon, with a portion of each vane within the rotor chamber (15) facing away from a surrounding wall (44) of the rotor chamber (15) engaging a guide track (59) that is coaxial to the rotor chamber (15) and which moves the vanes to defined radial positions, wherein:

• A diameter (d) of the guide track (59) taken perpendicular to a defined axial plane (a-a) through maximum and minimum radial movement positions of the rotor vanes (30) in the rotor (10) is larger than a diameter (e) of the guide track (59) lying in the axial plane (a-a), and wherein the intake and exhaust are provided in one of symmetrical segments of the rotor chamber defined by the axial plane (a-a).

A vane pump/motor having a stator (16) and a rotor (10) linked to a drive shaft (12), said rotor being mounted eccentrically in a circular-cylindrical rotor chamber (15) of the stator (16), said chamber having an intake (74) and an exhaust (76), with said rotor having angularly-spaced radially-movable plate-like rotor vanes mounted thereon, with a portion of each vane within the rotor chamber (15) facing away from a surrounding wall (44) of the rotor chamber (15) engaging an outer surrounding surfaces (59) of cylindrical steering rings (66, 68) which are engaged, with radial play, with the rotor drive shaft (12) by being respectively loosely placed in depressions in the rotor, wherein:

• at least outer surfaces of the steering rings (66, 68) are structured to have radial spring elasticity and the rotor vane (30) is held by a predetermined spring bias between the outer surfaces of the steering rings and a cylindrical surrounding wall (52).