Free-surface liquid transfer device for rotating machinery

A cooling system for rotating machinery, comprising:

• a reservoir configured to store a working fluid;
• a pumping system configured to remove working fluid from the reservoir;
• and
• a rotating member, wherein the rotating member comprises:
• a main shaft defining a hollow inner cavity configured to receive working fluid from the pumping system;
• an outer cylindrical wall defining a hollow annular cavity in fluid communication with the hollow inner cavity through a plurality of orifices formed on the main shaft;
• and
• a slinger formation in fluid communication with the hollow annular cavity through a plurality of radial slots formed through the slinger formation;
• wherein a central axis of the main shaft, a central axis of the hollow annular cavity, and a central axis of the slinger formation are collinear, and
• wherein the slinger formation is configured to transmit working fluid received through the plurality of radial slots outward as a continuous film having both tangential and radial velocity components.