OIL-SEPARATOR ROTOR FOR A TURBOMACHINE

• US 20110258977A1
• Filed: 09/29/2009
• Published: 10/27/2011
• Est. Priority Date: 10/24/2008
• Status: Active Grant

• Current Assignee: Safran Aircraft Engine Company
• Original Assignee: Snecma (Safran SA)
• Inventors: Dejaune, Claude Gerard Rene, Loro, Gael
• Granted Patent: US 8,337,581 B2
• Time in Patent Office: Days
• US Class Current: 55/385.1
• CPC Class Codes: B01D 45/14 generated by rotating vanes, discs, drums or brushes
• CPC Class Codes: F01D 25/18 Lubricating arrangements of machines or engines in general F01M
• CPC Class Codes: F01M 2013/0422 Separating oil and gas with a centrifuge device
• CPC Class Codes: F02C 7/06 Arrangements of bearings bearings F16C; Lubricating of turbo machines F01D25/18; of machines or engines in general F01M

Abstract

An oil separator rotor for a turbomachine, including a tubular hub that includes an external annular flange and an annular cover which, in cross section, is substantially L-shaped and mounted around the hub. The hub flange includes, at its external periphery, a mechanism to radially retain the free end of the cylindrical wall of the cover, so as to center this end and prevent it from deforming in the radially outwards direction under the effect of centrifugal force.

Claims

1-10. -10. (canceled)

11. A turbomachine oil-separator rotor comprising:

a tubular hub; and

an annular cap,

the tubular hub defining an internal axial passage for fluid and including an outer annular collar, and the annular cap being mounted around the hub, the annular cap comprising both a radial wall and a cylindrical wall that co-operates with the annular collar of the hub to define an annular chamber that communicates with the internal passage of the hub and that houses means for depositing oil by centrifuging,

wherein the annular collar of the hub includes at its outer periphery means for retaining an end of the cylindrical wall of the cap radially so as to center the end and prevent the end from deforming radially outwards under effect of centrifugal forces, and

wherein an inner peripheral portion of the radial wall of the cap bears axially thereagainst and is fastened by nut-and-bolt type means to the hub at a distance from the collar.

12. An oil-separator rotor according to claim 11, wherein the outer periphery of the collar of the hub includes a cylindrical rim extending axially towards the cap around the end of the cylindrical wall of the cap.

13. An oil-separator rotor according to claim 11, wherein the outer periphery of the collar of the hub includes circumferentially-extending tongues projecting axially towards the cap around the end of the cylindrical wall of the cap.

14. An oil-separator rotor according to claim 13, wherein the tongues are regularly distributed around the longitudinal axis of the oil-separator rotor.

15. An oil-separator rotor according to claim 13, wherein each tongue is in alignment with a longitudinal strip of material of the cylindrical wall of the cap, the strips of material of the cap defining oil outlet openings between one another.

16. An oil-separator rotor according to claim 11, wherein the inner peripheral portion of the radial wall of the cap includes means for bearing axially against an outer annular flange or outer radial tabs of the hub, the flange or the tabs including axial orifices in alignment with the orifices in the radial wall of the cap to pass cap fastener screws.

17. An oil-separator rotor according to claim 11, wherein the nut-and-bolt type fastener means are three in number and are regularly distributed around the longitudinal axis of the oil-separator rotor.

18. An oil-separator rotor according to claim 11, wherein the fastener means comprise nuts that are crimped in the orifices of the flange or of the tabs of the hub and that co-operate with bolts that are engaged axially from the outside of the chamber into the orifices in the cap.

19. An oil-separator rotor according to claim 11, wherein the radial wall of the cap includes a cylindrical rim at its inner periphery for centering the cap on the hub.

20. A turbomachine, an airplane turbojet, or a turboprop, comprising at least one oil-separator rotor according to claim 11.