Vane cell pump

Patent metadata

Field	Value
Publication number	US-11603838-B2
Application number	US-202017066810-A
Country	US
Kind code	B2
Filing date	Oct 9, 2020
Priority date	Oct 10, 2019
Publication date	Mar 14, 2023
Grant date	Mar 14, 2023

Abstract

A vane cell pump, including: a rotor and a plurality of vanes rotatable with the rotor, wherein the rotor includes a sub-vane chamber for each vane, and each vane forms a shifting wall of the sub-vane chamber assigned to it; first and second end-facing walls adjoining the rotor on end-facing sides and which, in order to control pressure to the sub-vane chamber, include sub-vane cavities which extend in the circumferential direction of the rotor and include control edges as viewed in the circumferential direction; wherein the control edge of the sub-vane cavity of the first end-facing wall, and the control edge of the sub-vane cavity of the second end-facing wall which is similar to it, are arranged angularly offset about the rotational axis as the apex with respect to each other.

First claim

The invention claimed is:

1. 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 forms a shifting wall of the sub-vane chamber assigned to it;
a first end-facing wall which adjoins the rotor on an end-facing side on a first side of the rotor and which, in order to control pressure to the sub-vane chamber, comprises a sub-vane cavity which extends in a circumferential direction of the rotor;
a second end-facing wall which adjoins the rotor on an end-facing side on a second side of the rotor and which, in order to control pressure to the sub-vane chamber, comprises a sub-vane cavity which extends in the circumferential direction and lies opposite the sub-vane cavity of the first end-facing wall,
wherein the first end-facing wall comprises a separating stay which fluidically separates the respective sub-vane chamber of the plurality of vanes from the sub-vane cavity of the first end-facing wall in a rotational position of the rotor, while said respective sub-vane chamber of the plurality of vanes is situated in a region of the separating stay of the first end-facing wall, and the second end-facing wall comprises a separating stay which is opposite the separating stay of the first end-facing wall and which fluidically separates the respective sub-vane chamber of the plurality of vanes from the sub-vane cavity of the second end-facing wall in a rotational position of the rotor, while said respective sub-vane chamber of the plurality of vanes is situated in a region of the separating stay of the second end-facing wall, wherein the separating stay of the first end-facing wall and the opposite separating stay of the second end-facing wall are arranged angularly offset about the rotational axis with respect to each other,
wherein the separating stay of the first end-facing wall and the opposite separating stay of the second end-facing wall overlap in a projection along the rotational axis partially in an overlap region.

2. The vane cell pump according to claim 1 , wherein a control edge of the sub-vane cavity of the first end-facing wall, and a control edge of the sub-vane cavity of the second end-facing wall which is similar to it, each form an end or a beginning of the respective sub-vane cavity in relation to the rotating direction of the rotor.

3. The vane cell pump according to claim 2 , wherein a contour ring comprising an inner contour which extends around the rotational axis of the rotor and along which the plurality of 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 a region of the inner contour between the descending region and the ascending region is formed so as to define a lower dead centre for the plurality of vanes, at which the direction of movement of a vane of the plurality of vanes in relation to the rotor is reversed when said vane slides from the descending region to the ascending region via the lower dead centre, wherein an angular distance around the rotational axis of the rotor between the lower dead centre and the control edge of the sub-vane cavity of the first end-facing wall and an angular distance around the rotational axis of the rotor between the lower dead centre and the similar control edge of the sub-vane cavity of the second end-facing wall, are different in size.

4. The vane cell pump according to claim 3 , wherein the inner contour of the contour ring is adapted to define at least one first ascending region, at least one first descending region, at least one second ascending region and at least one second descending region, wherein a region defining the lower dead centre is arranged between the first descending region and the second ascending region or between the second descending region and the first ascending region.

5. The vane cell pump according to claim 2 , wherein the rotor exhibits or is adapted to assume
a rotational position in which the sub-vane cavity of the first end-facing wall is connected in fluid communication with one of the sub-vane chambers of the plurality of vanes and the opposite sub-vane cavity of the second end-facing wall is likewise connected in fluid communication with said one sub-vane chamber,
a rotational position in which the sub-vane cavity of the first end-facing wall is fluidically separated from another one of the sub-vane chambers of the plurality of vanes and the opposite sub-vane cavity of the second end-facing wall is connected in fluid communication with said another sub-vane chamber, or
a rotational position in which the sub-vane cavity of the second end-facing wall is fluidically separated from yet another one of the sub-vane chambers and the opposite sub-vane cavity of the first end-facing wall is connected in fluid communication with said yet another sub-vane chamber.

6. The vane cell pump according to claim 1 , wherein the rotor exhibits or is adapted to assume
a rotational position in which the sub-vane cavity of the first end-facing wall is connected in fluid communication with one of the sub-vane chambers and the opposite sub-vane cavity of the second end-facing wall is likewise connected in fluid communication with said sub-vane chamber,
a rotational position in which the sub-vane cavity of the first end-facing wall is fluidically separated from one of the sub-vane chambers of the plurality of vanes and the opposite sub-vane cavity of the second end-facing wall is connected in fluid communication with said one sub-vane chamber, or
a rotational position in which the sub-vane cavity of the second end-facing wall is fluidically separated from another one of the sub-vane chambers of the plurality of vanes and the opposite sub-vane cavity of the first end-facing wall is connected in fluid communication with said another sub-vane chamber.

7. The vane cell pump according to claim 1 , wherein the width, extending in the circumferential direction, of the overlap region is smaller than the width, extending in the circumferential direction, of the sub-vane chamber opening which points towards the first end-facing side or the sub-vane chamber opening which points towards the second end-facing side.

8. The vane cell pump according to claim 1 , wherein a region defining a lower dead centre is arranged within an angular range of the separating stay of the first end-facing wall or within an angular range of the separating stay of the second end-facing wall and within an angular range of the overlap region.

9. The vane cell pump according to claim 1 , wherein the vane cell pump is adapted such that while the rotor is being rotated, a sub-vane chamber is connected in fluid communication with a sub-vane cavity, arranged in the descending region, of one end-facing wall, until said sub-vane chamber is or comes to be connected in fluid communication with the sub-vane cavity, arranged in the ascending region, of the other end-facing wall.

10. 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 wal

Assignees

• Shw Automotive Gmbh

Inventors

• Meinig Uwe
• Rauscher Robin Rene
• Preisler Lothar

Classifications

• F01C21/0863 Primary

  the fluid being the working fluid · CPC title

• F01C21/106

  with a radial surface, e.g. cam rings · CPC title

• F04C2/344 Primary

  with vanes reciprocating with respect to the inner member · CPC title

• F04C15/00

  Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00 (of pumps specially adapted for elastic fluids F04C18/00 - F04C29/00) · CPC title

• F04C15/0023

  Axial sealings for working fluid · CPC title