Internal gear pump
AssigneeRobert Bosch GmbH
InventorsRene Schepp, Kornelius Loew
Life of this patent
Estimating the term…
Abstract
An internal gear pump includes a ring gear and a pinion configured to mesh with the ring gear. The ring gear and pinion delimit a pump chamber extending from a suction region to a pressure region. The internal gear pump also includes an axial disk arranged on front faces of the ring gear and the pinion and includes a lubricant feed from the suction region between the axial disk and the ring gear and pinion. The lubricant feed includes a lubricant channel which passes through the axial disk. A wedge gap is delimited between the axial disk and the ring gear and pinion. The wedge gap communicates with the suction region and, when the ring gear and the pinion are driven in rotation, a lubricating film forms between the axial disk and the ring gear and pinion.
Claims4
An internal gear pump, comprising:
- a ring gear;
- a pinion arranged eccentrically in the ring gear and configured to mesh with the ring gear in a circumferential section;
- a pump chamber delimited between the ring gear on an outside and the pinion on an inside, the pump chamber extending in a circumferential direction from a suction region to a pressure region outside the circumferential section in which the ring gear and the pinion mesh;
- at least one axial disk arranged on a front face of the ring gear and a front face of the pinion and configured to bear against the front faces of the ring gear and of the pinion, the at least one axial disk configured to be subjected to pressure on an outer side oriented away from the ring gear and the pinion and configured to delimit the pump chamber on one side;
- and
- a lubricant feed from the suction region between the at least one axial disk and the ring gear and/or the pinion.
Dependencies are inferred from the claim text.