COMPOSITE ARTICLE AND SUPPORT FRAME ASSEMBLY

• US 20110008163A1
• Filed: 07/08/2009
• Published: 01/13/2011
• Est. Priority Date: 07/08/2009
• Status: Active Grant

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Senile, Darrell Glenn, Prentice, Ian Francis
• Granted Patent: US 8,226,361 B2
• Time in Patent Office: Days
• US Class Current: 415/209.3
• CPC Class Codes: F01D 25/246 Fastening of diaphragms or stator-rings
• CPC Class Codes: F01D 5/282 Selecting composite materials, e.g. blades with reinforcing filaments
• CPC Class Codes: F01D 9/042 fixing blades to stators fixing stator-rings in the casing or to each other F01D25/246
• CPC Class Codes: F05D 2240/80 Platforms for stationary or moving blades
• CPC Class Codes: F05D 2260/30 Retaining components in desired mutual position
• CPC Class Codes: F05D 2300/603 Composites; e.g. fibre-reinforced
• CPC Class Codes: Y02T 50/60 Efficient propulsion technologies, e.g. for aircraft

Abstract

A support frame includes a rail engaging a hook of a composite article having plys. The rail included a rail contact surface generally conformal to and contacting a hook contact surface of the hook. The rail and hook contact surfaces being substantially normal to the plys beneath the hook contact surface. One embodiment of the article is a composite nozzle segment including one or more airfoils extending radially between arcuate radially outer and inner band segments having plys curved about a centerline axis and the rail engages a hook of the radially inner band segment. The hook and the rail may be straight or arcuate. The frame includes a central body extending axially aftwardly from the rail to an aft frame flange. A frame pin may be mounted on the frame, engage the inner band segment or one of the airfoils, and may extend into a cavity in the airfoil.

Claims

1. A composite article and frame assembly comprising:

a composite article having plys,

a support frame including a rail engaging a hook of the composite article,

the rail including a rail contact surface generally conformal to and contacting a hook contact surface of the hook, and

the rail and hook contact surfaces being substantially normal to the plys beneath the hook contact surface.

2. An assembly as claimed in claim 1, further comprising the hook and the rail being straight.

3. An assembly as claimed in claim 1, further comprising the hook and the rail being arcuate.

4. An assembly as claimed in claim 1, further comprising the composite article being a composite nozzle segment including one or more airfoils extending radially between radially outer and inner band segments and the outer and inner band segments being arcuate and curved about a centerline axis.

5. A composite nozzle segment and frame assembly comprising:

a composite nozzle segment including one or more airfoils extending radially between arcuate radially outer and inner band segments having plys and curved about a centerline axis,

a support frame including a rail engaging a hook of the radially inner band segment,

the rail including a rail contact surface generally conformal to and contacting a hook contact surface of the hook, and

the rail and hook contact surfaces being substantially normal to the plys beneath the hook contact surface.

6. An assembly as claimed in claim 5, further comprising the hook and the rail being straight.

7. An assembly as claimed in claim 5, further comprising the hook and the rail being arcuate.

8. An assembly as claimed in claim 5, further comprising:

each of the airfoils including pressure and suction sides extending axially between airfoil leading and trailing edges and extending radially between the inner and outer band segments,

the inner and outer band segments including segment leading and trailing edges generally corresponding to the airfoil leading and trailing edges respectively, and

the hook being located at the segment leading edge of the inner band segment and curved radially inwardly and axially aftwardly from the segment leading edge.

9. An assembly as claimed in claim 8, further comprising the hook and the rail being straight.

10. An assembly as claimed in claim 8, further comprising the hook and the rail being arcuate.

11. An assembly as claimed in claim 8, further comprising the frame including a central body extending axially aftwardly from the rail to an aft frame flange.

12. An assembly as claimed in claim 11, further comprising the frame including a mounting flange extending radially inwardly from a forward position of the central body aft of the rail.

13. An assembly as claimed in claim 11, further comprising a frame pin or a tab mounted on the frame and engaging the inner band segment or one of the airfoils.

14. An assembly as claimed in claim 13, further comprising the frame pin having a threaded radially inner end screwed into a threaded boss on the frame.

15. An assembly as claimed in claim 8, further comprising the frame clamped to the composite nozzle segment by a clamp.

16. An assembly as claimed in claim 15, further comprising:

at least one of the airfoils being hollow and having a cavity,

the clamp including a threaded rod extending through the cavity,

the rod including a threaded radially inner end screwed into a threaded boss on the frame, and

a load spreader attached to a threaded radially outer end of the rod with a nut, and

the load spreader engaging the outer band segment to clamp the frame to the composite nozzle segment.

17. An assembly as claimed in claim 16, further comprising the hook and the rail being straight.

18. An assembly as claimed in claim 16, further comprising the hook and the rail being arcuate.

19. An assembly as claimed in claim 16, further comprising the frame including a central body extending axially aftwardly from the rail to an aft frame flange.

20. An assembly as claimed in claim 19, further comprising the frame including a mounting flange extending radially inwardly from a forward position of the central body aft of the rail.

21. A turbine nozzle and support assembly comprising:

a circular row of composite nozzle segments,

each composite nozzle segment in the circular row of composite nozzle segments contacting a frame for transferring axial loads from the composite nozzle segment to an aft nozzle support,

the composite nozzle segment including one or more airfoils extending radially between arcuate radially outer and inner band segments having plys and curved about a centerline axis,

the support frame including a rail engaging a hook of the radially inner band segment,

the rail including a rail contact surface generally conformal to and contacting a hook contact surface of the hook, and

the rail and hook contact surfaces being substantially normal to the plys beneath the hook contact surface.

22. An assembly as claimed in claim 21, further comprising:

the frame including a central body extending axially aftwardly from the rail to an aft frame flange having an aft facing peaked surface,

a support flange of the aft nozzle support, and

an axial load path through the frame to the support flange.

23. An assembly as claimed in claim 22, further comprising the hook and the rail being straight.

24. An assembly as claimed in claim 22, further comprising the hook and the rail being arcuate.

25. An assembly as claimed in claim 22, further comprising:

each of the airfoils including pressure and suction sides extending axially between airfoil leading and trailing edges and extending radially between the inner and outer band segments,

the inner and outer band segments including segment leading and trailing edges generally corresponding to the airfoil leading and trailing edges respectively, and

the hook being located at the segment leading edge of the inner band segment and curved radially inwardly and axially aftwardly from the segment leading edge.

26. An assembly as claimed in claim 25, further comprising the hook and the rail being straight.

27. An assembly as claimed in claim 25, further comprising the hook and the rail being arcuate.

28. An assembly as claimed in claim 25, further comprising the frame including a central body extending axially aftwardly from the rail to an aft frame flange.

29. An assembly as claimed in claim 28, further comprising a frame pin or a tab mounted on the frame and engaging the inner band segment or one of the airfoils.

30. An assembly as claimed in claim 29, further comprising the frame pin having a threaded radially inner end screwed into a threaded boss on the frame.

31. An assembly as claimed in claim 25, further comprising the frame clamped to the composite nozzle segment by a clamp.

32. An assembly as claimed in claim 31, further comprising:

at least one of the airfoils being hollow and having a cavity,

the clamp including a threaded rod extending through the cavity,

the rod including a threaded radially inner end screwed into a threaded boss on the frame, and

a load spreader attached to a threaded radially outer end of the rod with a nut, and

the load spreader engaging the outer band segment to clamp the frame to the composite nozzle segment.

33. An assembly as claimed in claim 32, further comprising the hook and the rail being straight or the hook and the rail being arcuate.