Lubrication – Systems – Gas turbine
Patent
1980-02-25
1982-08-17
Brown, David H.
Lubrication
Systems
Gas turbine
60 3908, F02G 706
Patent
active
043445063
ABSTRACT:
A bearing chamber is provided with drains on both sides of the bearing thus preventing oil surges spilling oil over the chamber seals. The bearing chamber has three compartments and the chamber is pressurized by air passing through the seals at its ends. A main drainage duct drains the main bearing compartment via a scavenge pump to the oil tank. Passages through the bearings under normal operation drain oil from the end compartments to the central compartment compartment A. When the main drain becomes ineffective due to sudden surges of oil to the ends of the chamber the oil passes via auxiliary drainage ducts back to the tank due to the pressure in the chamber. Baffles are provided between the bearings and the end walls of the chamber to prevent the oil sloshing over the entrances to the auxiliary drainage ducts at excessive speed thereby providing tranquil zones from which the oil passes into the drainage ducts.
REFERENCES:
patent: 2609065 (1952-09-01), Douglas
patent: 2986433 (1961-05-01), Herrmann
patent: 3531935 (1970-10-01), Poucher
patent: 3884041 (1975-05-01), Zerlauth
patent: 3890780 (1975-06-01), Hagemeister et al.
patent: 4156342 (1979-05-01), Korta et al.
Brown David H.
Rolls-Royce Limited
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