Gas turbine engine oil systems
AssigneeROLLS-ROYCE plc
InventorStanley Smith
Life of this patent
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Abstract
A gas turbine engine oil system is provided in which the centrifugal separator is arranged to act as a pump for supplying bearing chambers directly, and the scavenging of the bearing chambers is achieved primarily by the pressurization air which flows into the chambers to prevent oil leakage. To avoid the use of pressure regulating valves for controlling the oil flow an oil tank is pressurized and communicates with an auxiliary outlet from the separator, the pressure in which is governed by the quantity of oil flowing around the system. The tank and the bearing chambers are fluidly connected to the centrifugal separator in two separate fluid circuits with each circuit having the separator as an element thereof.
Claims8
A gas turbine engine oil system comprising an oil storage tank, a rotatable centrifugal separator, bearing chambers of an engine, scavenge means which operatively removes oil from the bearing chambers and directs it to the centrifugal separator, means for pressurizing said tank to a first pressure, conduit means which operatively conveys oil from the interior of said tank to the centrifugal separator oil circulating means which operatively directs at least a portion of the oil from the separator to the engine bearing chambers by centrifugal action of the centrifugal separator without passing the oil through said tank, and where said conduit means also operatively directs oil in excess of that required by the oil circulating means, back to said tank, at a pressure higher than the first pressure, whereby the bearing chambers and the tank are in separate flow circuits with each said circuit having said separator as an element thereof.
Dependencies are inferred from the claim text.