Dual mode scavenge scoop

• US 20080078617A1
• Filed: 09/28/2006
• Published: 04/03/2008
• Est. Priority Date: 09/28/2006
• Status: Active Grant

• Current Assignee: Rtx Corporation
• Original Assignee: United Technologies Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Inventors: Glahn, Jorn A., Sheridan, William G., James, Denman H.
• Granted Patent: US 8,292,510 B2
• Time in Patent Office: Days
• US Class Current: 184/6
• CPC Class Codes: F01D 25/16 Arrangement of bearings; Supporting or mounting bearings in casings bearings per se F16C
• CPC Class Codes: F01D 25/186 for sliding contact bearing
• CPC Class Codes: F05D 2240/126 Baffles or ribs
• CPC Class Codes: F05D 2260/602 Drainage
• CPC Class Codes: F05D 2260/6022 of leakage having past a seal seals F05D2240/57; glands F05D2240/63

Abstract

A system for removing oil from a bearing compartment has a port connected to an end wall of the compartment through which the oil exits the compartment, a scavenge scoop connected to the port for collecting the oil, and a separation device connected to the scavenge scoop for creating an oil collection region.

Claims

1. A system for removing oil from a bearing compartment comprising:

a port connected to an end wall of said compartment through which said oil exits said compartment;

a scavenge scoop connected to said port for collecting oil; and

a separation device connected to said scavenge scoop for creating an oil collection region.

2. The system according to claim 1, wherein said scavenge scoop is a tangential scavenge scoop.

3. The system according to claim 1, wherein said scavenge scoop has a first wall and a second wall at an angle to said first wall.

4. The system according to claim 3, further comprising said port having an exit pipe and said first wall extending into said exit pipe.

5. The system according to claim 3, wherein said exit pipe receives oil from both sides of said scoop.

6. The system according to claim 3, further comprising said port having an exit pipe, said first wall terminating at a distance from an entrance to said exit pipe, and a baffle mounted to said end wall.

7. The system according to claim 6, wherein said exit pipe receives oil from both sides of said scoop.

8. The system according to claim 1, wherein said separation device comprises a separation wall for forming a sump region with said end wall.

9. The system according to claim 8, wherein said separation wall is attached to said second wall.

10. The system according to claim 8, wherein said separation wall is integrally formed with said second wall.

11. A bearing compartment comprising:

a bearing;

means for introducing an airflow into said compartment;

means for introducing a flow of oil into said compartment to lubricate said bearing and cool said compartment;

means for introducing an airflow into said compartment to reduce the leakage of any oil from the compartment;

means for removing said oil from said compartment, said oil removing means comprising a port connected to an end wall of said compartment through which said oil exits said compartment, a scavenge scoop connected to said port for collecting oil, and a separation device connected to said scavenge scoop for creating an oil collection region.

12. The bearing compartment according to claim 11, wherein said scavenge scoop is a tangential scavenge scoop.

13. The bearing compartment according to claim 11, wherein said scavenge scoop has a first wall and a second wall at an angle to said first wall.

14. The bearing compartment according to claim 13, further comprising said port having an exit pipe and said first wall extending into said exit pipe.

15. The bearing compartment according to claim 13, wherein said exit pipe receives oil from both sides of said scoop.

16. The bearing compartment according to claim 13, further comprising said port having an exit pipe, said first wall terminating at a distance from an entrance to said exit pipe, and a baffle mounted to said end wall.

17. The bearing compartment according to claim 16, wherein said exit pipe receives oil from both sides of said scoop.

18. The bearing compartment according to claim 11, wherein said separation device comprises a separation wall for forming a sump region with said end wall.

19. The bearing compartment according to claim 18, wherein said separation wall is attached to said second wall.

20. The bearing compartment according to claim 18, wherein said separation wall is integrally formed with said second wall.

21. The bearing compartment according to claim 11, further comprising a breather port for allowing an air/oil mist to flow out of said compartment.

22. The bearing compartment according to claim 11, wherein said airflow introducing means comprises a port for receiving a flow of sealing airflow, means for transporting said airflow to an upstream cavity, and means within a disk for allowing said airflow to flow into said compartment.

23. The bearing compartment according to claim 11, wherein said oil introducing means comprises an oil supply nozzle.