FLUID-COOLED ROTARY PISTON FOR WANKEL-TYPE MECHANISM

摘要

The fluid-cooled rotary piston for a Wankel-type mechanism has a plurality of intersecting flank surfaces to form a multi-sided profile and a hub portion by which it is supported for rotation on a mainshaft. The rotary piston also has a closed-loop passageway for each flank surface extending in close spaced relation to the side faces of the rotor and the intersection of the flank surfaces. An inlet passage is provided for each closed-loop passageway to conduct to the latter, as the rotary piston rotates, pressurized cooling fluid from a source thereof. An outlet passage is provided for each closeloop passageway to conduct heated cooling fluid from the latter to an area adjacent the hub portion. The outlet passage may be provided with a restricted flow area to insure that the associated closed-loop passageway is maintained full of cooling fluid.