Power plants – Combustion products used as motive fluid – With lubricators
Patent
1983-04-04
1985-07-02
Casaregola, Louis J.
Power plants
Combustion products used as motive fluid
With lubricators
184 611, 184 612, F02C 706
Patent
active
045259950
ABSTRACT:
A gas turbine engine intended for airborne applications in which several of the main bearings of the engine are contained in a bearing cavity and oil is scavenged from this cavity by allowing air from the high pressure region of the engine to leak into the cavity and then flow downwardly, together with entrained scavenge oil from the cavity, through an oversized cored passage housing a quill shaft driving the accessory gearbox for delivery to a crude separator at the bottom of the gearbox where the air is discharged to a low pressure region of the engine and the deaerated oil is delivered to the inlet of the scavenge pump. The leakage air flow effectively scavenges oil from the bearing cavity in all attitudes of the engine and also induces a flow of scavenge oil from the gearbox during upright operation. The gearbox also includes a cored passage which opens at its lower end in the separator and has its upper end arranged tangentially with respect to the topmost gear in the gearbox so that, during inverted operation of the engine, the topmost gear functions as a slinger to force scavenge oil from the gearbox to flow upwardly through the gearbox passage for delivery to the separator and thence to the scavenge pump.
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Casaregola Louis J.
Lyon Lyman R.
Stout Donald E.
Williams International Corporation
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