Gas turbine engine lubrication fluid barrier

摘要

A system for forming a barrier between a lubrication oil region and an air region of a gas turbine engine comprising a lubrication oil return path, a centrifugal oil slinger on a rotating member fixed to a spool of the gas turbine engine, a spiral groove configured to direct lubrication oil toward an oil return path, a labyrinth seal, and a cavity configured to form a non-contacting seal with the spiral groove and the labyrinth seal.

主权项

1. A method for retrofitting a gas turbine engine, the method comprising:
removing a preexisting gas turbine engine rotating seal; installing a gas turbine engine rotating seal having a forward end and aft end, relative to its axis of rotation, the gas turbine engine rotating seal comprising:
a first centrifugal oil slinger section circumscribed on the forward end of a rotating member and configured to redirect lubrication oil away from the rotating member,a screw seal section including at least one spiral groove circumscribed on the rotating member and axially positioned aft of the first centrifugal oil slinger section and configured to direct lubrication oil toward the forward end of the rotating member, and,a first labyrinth seal section including one or more knife edges, the first labyrinth seal circumscribed on the rotating member and axially positioned aft of the screw seal section; capping a preexisting port configured to provide buffer air to the preexisting rotating seal; and removing air delivery equipment configured to deliver buffer air to the preexisting port.