초록 ▼

An oil scavenge system includes a scavenge pipe which extends forward into a relatively long and narrow compartment area of a rear bearing compartment of a gas turbine engine with aggressive core size constraints. The scavenger pipe communicates collected oil to a scavenger pump to return oil to the

An oil scavenge system includes a scavenge pipe which extends forward into a relatively long and narrow compartment area of a rear bearing compartment of a gas turbine engine with aggressive core size constraints. The scavenger pipe communicates collected oil to a scavenger pump to return oil to the oil sump and evacuate the oil before flooding of the seals may occur.

대표청구항 ▼

1. An oil scavenge system for a gas turbine engine comprising: a bearing compartment having a first compartment area and a second compartment area, the first compartment being radially outboard of the second compartment area relative to an engine axis of rotation;a scavenger pipe having an inlet, sa

1. An oil scavenge system for a gas turbine engine comprising: a bearing compartment having a first compartment area and a second compartment area, the first compartment being radially outboard of the second compartment area relative to an engine axis of rotation;a scavenger pipe having an inlet, said scavenger pipe extends into said second compartment area generally parallel to the engine axis of rotation, said scavenger pipe positioned radially inboard of said first compartment area;a fitting mounted to the scavenger pipe at a location generally opposite the inlet, the fitting being disposed in the first compartment area;a connector mounted between said scavenger pipe and said fitting to communicate fluid from the scavenger pipe to the fitting, said connector disposed in both said first and second compartment areas; anda scavenger pump in communication with said fitting. 2. The system as recited in claim 1, further comprising a second scavenger pump in communication with said scavenger pipe. 3. The system as recited in claim 1, wherein said inlet is a circumferential inlet located through a sidewall of said scavenger pipe configured to receive a swirling bearing compartment two-phase air/oil mixture from a circumferential engine rotation path direction, the circumferential engine rotation path direction generally transverse to the engine axis of rotation. 4. The system as recited in claim 3, wherein said scavenger pipe includes a turning vane located therein adjacent to said inlet, said turning vane configured to redirect the swirling bearing compartment two-phase air/oil mixture from the circumferential engine rotation path direction to an axial direction into the scavenger pipe generally parallel to the engine axis of rotation. 5. The system as recited in claim 1, wherein said scavenger pipe is remote from said first compartment area. 6. The system of claim 1, wherein said second compartment area is a long and narrow compartment area generally parallel to an engine axis. 7. The system as recited in claim 1, wherein said scavenger pipe is non-circular in cross-section, said scavenger pipe defines a multiple of openings through a radial inboard surface relative said axis of rotation. 8. The system as recited in claim 1, wherein the fitting is mounted to the scavenger pipe at a location generally opposite the inlet by way of a connector configured to communicate fluid between the scavenger pipe and the fitting. 9. The system as recited in claim 8, wherein the connector is L-shaped. 10. The system as recited in claim 1, wherein the scavenger pipe is located generally upstream relative to the fitting. 11. The system as recited in claim 1, wherein the second bearing compartment is axially longer than the first bearing compartment. 12. The assembly as recited in claim 1, wherein said connector is formed separately from said scavenger pipe and said fitting. 13. An oil scavenge system for a gas turbine engine comprising: a bearing compartment having a first compartment area and a second compartment area, the first compartment area disposed radially outboard of the second compartment area relative to an engine axis of rotation;a primary scavenger pump in fluid communication with said first compartment area;a scavenger pipe having an inlet, said scavenge pipe extends into said second compartment area generally parallel to the engine axis of rotation, said scavenger pipe positioned radially inboard of said first compartment area;a secondary scavenger pump in fluid communication with said scavenger pipe. 14. The system as recited in claim 13, wherein said bearing compartment is a rear bearing compartment of a gas turbine engine. 15. The system as recited in claim 13, wherein said scavenger pipe is located at bottom dead center of said second compartment area, said inlet is a circumferential inlet located through a sidewall of said scavenger pipe to receive a swirling bearing compartment two-phase air/oil mixture from a circumferential engine rotation path direction. 16. The system as recited in claim 13, wherein said second compartment area is a long and narrow compartment area generally parallel to said engine axis of rotation radially inboard of said first compartment area relative to an engine axis of rotation. 17. The system as recited in claim 13, wherein said scavenger pipe is one of a multiple of scavenger pipes in fluid communication with a fitting. 18. An oil scavenger pipe assembly for a gas turbine engine comprising: a bearing compartment including a first compartment area and a second compartment area, said first compartment area radially outboard of said second compartment area relative to an engine axis of rotation;a scavenger pipe having an inlet disposed in said second compartment area, said scavenger pipe extending in a direction generally parallel to an engine axis of rotation;a connector mountable to said scavenger pipe opposite said inlet, said connector being disposed at least partially in said first compartment area;a fitting mountable to said connector and axially offset from said scavenger pipe; anda turning vane mounted within said scavenger pipe adjacent said inlet, said turning vane redirecting fluid entering the inlet to flow downstream through the scavenger pipe in a direction generally parallel to said engine axis of rotation. 19. The assembly as recited in claim 18, wherein said scavenger pipe is non-circular in cross-section, said scavenger pipe defines a multiple of openings through a radial inboard surface relative said axis of rotation. 20. The assembly as recited in claim 18, wherein said turning vane includes a pin which extends therefrom to mount said scavenger pipe, said inlet is a circumferential inlet located through a sidewall of said scavenger pipe to receive a swirling bearing compartment two-phase air/oil mixture from a circumferential engine rotation path direction, the circumferential engine rotation path being generally transverse to said engine axis of rotation, said turning vane redirects the swirling bearing compartment two-phase air/oil mixture from the circumferential engine rotation path direction to an axial direction into the scavenger pipe, the axial direction being generally parallel to the engine axis of rotation. 21. The assembly as recited in claim 18, wherein the scavenger pipe, the connector, and the fitting are each configured to allow fluid to flow therethrough. 22. The assembly as recited in claim 21, wherein, when fluid enters the inlet, fluid enters the inlet in a direction generally transverse to the engine axis of rotation. 23. The assembly as recited in claim 22, wherein said turning vane causes fluid entering through the inlet to flow downstream through the scavenger pipe in a direction generally parallel to the engine axis of rotation.