Vane cell pump

A vane cell pump, comprising:

• a rotor, which is adapted to be rotated about a rotational axis, and a plurality of vanes which are guided by the rotor such that the plurality of vanes are adapted to be shifted when the rotor rotates, wherein the rotor comprises a sub-vane chamber for each vane of the plurality of vanes, and each vane of the plurality of vanes forms a shifting wall of the sub-vane chamber assigned to it;
• a contour ring comprising an inner contour which extends around the rotational axis and along which the vanes slide when the rotor is rotated, wherein the inner contour of the contour ring is adapted to define at least one ascending region and at least one descending region, wherein a vane is moved out of the rotor as it slides over the ascending region and is moved into the rotor as it slides over the descending region, wherein the inner contour between the descending region and the ascending region comprises a region which defines a lower dead centre for the vane which passes therethrough, and the inner contour between the ascending region and the descending region comprises region which defines an upper dead centre for the vane which passes therethrough;
• a first end-facing wall which adjoins the rotor on an end-facing side on a first side of the rotor;
• a second end-facing wall which adjoins the rotor on an end-facing side on a second side of the rotor,
• wherein the first end-facing wall and the second end-facing wall each comprise:
• at least one ascending sub-vane cavity, in fluid communication with which the sub-vane chamber is connected when its vane is situated in the ascending region of the contour ring;
• at least one descending sub-vane cavity, in fluid communication with which the sub-vane chamber is connected when its vane is situated in the descending region of the contour ring;
• and
• a separating stay which is formed between and fluidically separates the descending sub-vane cavity and the ascending sub-vane cavity in the area of the lower dead centre, wherein the separating stay which is formed between the descending sub-vane cavity and the ascending sub-vane cavity of the first end-facing wall is arranged such that it is angularly offset about the rotational axis with respect to the separating stay which lies opposite the separating stay of the first end-facing wall along or parallel to the rotational axis and which is formed between the descending sub-vane cavity and the ascending sub-vane cavity of the second end-facing wall,
• wherein one of the first and second end-facing walls comprises a separating stay which is formed between the ascending sub-vane and the descending sub-vane cavity in the area of the upper dead centre, and which forms a channel which is open toward the rotor and connects the ascending sub-vane cavity in fluid communication with the descending sub-vane cavity.

A vane cell pump, wherein the vane cell pump is formed as one of a multi-flux, a dual-flux, a multi-stroke and a two-stroke vane cell pump, further comprising:

• a contour ring comprising an inner contour which extends around the rotational axis and along which vanes slide when a rotor of the vane cell pump is rotated, wherein the inner contour of the contour ring is adapted to define a first ascending region and a first descending region which are assigned to a first flux, and at least a second ascending region and a second descending region which are assigned to a second flux, wherein a vane is moved out of the rotor as it slides over the first or second ascending region and is moved into the rotor as it slides over the first or second descending region;
• a first end-facing wall which adjoins the rotor on an end-facing side on a first side of the rotor;
• and
• a second end-facing wall which adjoins the rotor on an end-facing side on a second side of the rotor,
• wherein one of i) the first end-facing wall and second end-facing wall, or ii) the first end-facing wall and the second end-facing wall, comprises:
• a first ascending sub-vane cavity, in fluid communication with which a sub-vane chamber is connected when its vane is situated in the first ascending region of the contour ring;
• a first descending sub-vane cavity, in fluid communication with which a sub-vane chamber is connected when its vane is situated in the first descending region of the contour ring;
• a second ascending sub-vane cavity, in fluid communication with which a sub-vane chamber is connected when its vane is situated in the second ascending region of the contour ring;
• a second descending sub-vane cavity, in fluid communication with which a sub-vane chamber is connected when its vane is situated in the second descending region of the contour ring;
• a separating stay which is formed between the first descending sub-vane cavity and the second ascending sub-vane cavity;
• and
• a separating stay which is formed between the second descending sub-vane cavity and the first ascending sub-vane cavity,
• wherein the separating stays are offset, about the rotational axis as an apex, with respect to each other by an angle which is not equal to 180°.