United Technologies Corporation

Larry W Spires

J Axel Glahn

Robert E Peters

Dwayne E Messerschmidt

Roger M Barnsby

Kenneth L Allard

Hsianmin Jen

Paul A Dickie

Hslanmin F Jen

William G Sheridan

Francis Parnin

Denman H James

Yuan Dong

Sean P McCutchan

James T Thoresen

Axel J Glahn

A disclosed lubrication pump includes a main pump stage, an auxiliary pump stage, and scavenger pump stages. The lubrication pump therefore may be driven by a common shaft of the accessory gearbox.

Auxiliary lubricant supply pump stage integral with main lubricant pump stage

An assembly includes a reservoir for holding a fluid, and a scavenge passage connected to the reservoir at a reservoir inlet. The scavenge passage returns the fluid from a delivery location to the reservoir. A bleed passage is connected in fluid communication between the reservoir and the scavenge passage.

Reduced gulp fluid reservoir

An oil scavenge system includes a tangential scavenge scoop and a settling area adjacent thereto which separately communicate with a duct which feeds oil into an oil flow path and back to an oil sump. A shield is mounted over the settling area to at least partially shield the collecting liquid oil from interfacial shear. A multiple of apertures are located through the shield to permit oil flow through the shield and into the duct. The scavenge scoop forms a partition which separates the duct into a first portion and a second portion. The first portion processes upstream air/oil mixture that is captured by the tangential scoop while the second portion receives the oil collected in the settling area.

Bifurcated oil scavenging bearing compartment within a gas turbine engine

A deoilerfor separating oil from air contaminated with the oil has at least one separator for separating the oil from the air and also has a source of suction for reducing air pressure at the source of the air. In an exemplary embodiment, the deoilercreates the suction at a first operating condition, but acts as a restrictor at a second operating condition. A deoiling method according to the invention creates suction at a first operating condition to reduce the air pressure at the source of the oil-contaminated air, establishes a flow restriction at a second operating condition to pressurize the air source, and encourages oil to separate from the air at both operating conditions. When used as a component of a turbine engine lubrication system, the source of contaminated air may be a buffered bearing compartment. The inventive deoiler ensures a positive pressure difference across the bearing compartment sealsat the engine's idle power setting without requiring the idle setting to be undesirably high, and without requiring the use of buffer air whose pressure at higher engine power is high enough to be detrimental. In an exemplary embodiment, the deoiler pressurizes the bearing compartment at higher power settings to resist excessive buffer air infiltration into the bearing compartment.

Deoiler for a lubrication system

Method of scavenging oil within a gas turbine engine

Bifurcated oil scavenge system for a gas turbine engine

Growing community of inventors

Unionville, CT, United States of America

Larry W Spires