System comprising an electric machine and a hydraulic unit, as well as electric machine and hydraulic unit

A system comprising

• an electric machine, wherein the electric machine comprises a first shaft, and
• a hydraulic unit, wherein the hydraulic unit comprises a second shaft, wherein
• the first shaft and the second shaft are connected to one another to form a shaft-hub connection,.
• the shaft-hub connection comprises a central recess
• the shaft-hub connection is fluidically connected to an interior of the hydraulic unit for lubrication and
• the hydraulic unit comprises a leakage oil chamber wherein
• the central recess adjoins at least one transverse channel, wherein the at least one transverse channel extends from the central recess to an external circumference of the shaft-hub connection,
• wherein fluid located in the at least one transverse channel is subjected to a centrifugal force during operation of the system, whereby fluid is conveyed from the central recess into the leakage oil chamber surrounding the external circumference of the shaft, wherein fluid is sucked in as a result of the negative pressure formed thereby in the recess, so that a specific conveying direction of the fluid is predefined.