APPARATUS FOR SEPARATING AIR AND OIL FOR GEAR BOX OF AIRPLANE

摘要

In a gearbox for an aircraft, a multiple stage separator is attached to a gear journaled within the gearbox housing. An axial bore extends at least partially through the shaft supporting the gear and opens into a discharge chamber which communicates with an atmospheric vent. A first stage of the separator includes an impeller attached to one face of the gear and a second stage includes a series of angularly spaced passages extending in a generally radial direction through the shaft to communicate with the bore. A sleeve telescoped into a reduced section of the inner end of the bore receives the incoming mixture of air and oil and directs the air into an enlarged outer end section of the bore wherein final stage separation of air and oil occurs. A member including an aperture concentric with the central axis of the bore keeps the oil collected along the walls of the bore from entering into the discharge chamber. A passage defined by a flat formed on the outside of the sleeve provides a flow path in a direction away from the discharge chamber for the collected oil to exit the bore back to the interior of the housing.