Patent ID: 9039398
Filing Date: 2015-05-26
Classification: F01C,F04C

Abstract:
1. 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 having an inner side oriented toward the ring gear and the pinion and an opposite outer side oriented away from the ring gear and the pinion, the outer side being configured to be subjected to pressure and the inner side being 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 at least one of the ring gear and the pinion, wherein: the lubricant feed includes a lubricant channel in the at least one axial disk, the lubricant channel is configured to communicate with the suction region of the internal gear pump and is configured to open, on the inner side of the at least one axial disk, onto the front face of at least one of the ring gear and the pinion, and the lubricant channel is configured to pass through the at least one axial disk from the outer side to the inner side.