Modular LRU accessory mounting substrate for auxiliary power unit

• US 7,516,621 B2
• Filed: 08/04/2005
• Issued: 04/14/2009
• Est. Priority Date: 08/04/2005
• Status: Expired due to Fees

• Current Assignee: Hamilton Sundstrand Corporation (Rtx Corporation)
• Original Assignee: Hamilton Sundstrand Corporation (Rtx Corporation)
• Inventors: Hughes, Daniel L., Mayborne, Rusty E., Kohls, Michael D., Ta, Khang D., Gregory, Daniel M., Worthington, Stephen, Olderbak, Michael J., McQuillan, Edward R., Diot, Thomas H., Jewess, Gordon F., Suttie, Peter J.
• Primary Examiner(s): Casaregola; Louis J
• Application Number:
  US11/197,389
• Publication Number:
  US 20070029454A1
• Time in Patent Office: 1,349 Days
• Field of Search: 607/96, 607/98, 608/02, 248/558, 248/638, 248/639
• US Class Current: 60/796
• CPC Class Codes: F02C 7/32 Arrangement, mounting, or driving, of auxiliaries
• CPC Class Codes: F05D 2230/60 Assembly methods

Abstract

A multiple accessory support bracket that mounts a plurality of external accessories for an auxiliary power unit (APU) so that all the external accessories may be mounted to the APU in a single operation.

Claims

1. A passive gearless multiple accessory support bracket that supports a plurality of external accessories for a gas turbine engine, comprising:

an attachment surface with a shape and contour that form-fits with a mating surface on the engine;

a plurality of primary bracket attachment points on the accessory support bracket for attaching the accessory support bracket to the mating surface on the engine;

an accessory mounting surface on a side of the accessory support bracket generally opposite the attachment surface; and

a plurality of secondary bracket attachment points along the accessory mounting surface for mounting the accessories on the multiple accessory support bracket.

2. The multiple accessory support bracket of claim 1, wherein the gas turbine engine is an auxiliary power unit (APU).

3. The multiple accessory support bracket of claim 1, wherein the primary bracket attachment points on the multiple accessory support bracket comprise a plurality of vibration isolators.

4. The multiple accessory support bracket of claim 1, wherein the primary fasteners pass through the primary bracket attachment points to fasten the multiple accessory support bracket to APU attachment points on the mating surface of the APU.

5. The multiple accessory support bracket of claim 1, wherein at least one of the secondary fasteners fasten to at least one of the secondary bracket attachment points to mount the accessories on the multiple accessory support bracket.

6. The multiple accessory support bracket of claim 1, wherein the accessories comprise at least one line replaceable unit (LRU).

7. The multiple accessory support bracket of claim 6, wherein the LRU comprises a fuel control unit (FCU).

8. The multiple accessory support bracket of claim 6, wherein the LRU comprises an exciter.

9. The multiple accessory support bracket of claim 6, wherein the LRU comprises a data memory module (DMM).

10. The multiple accessory support bracket of claim 1, wherein the accessories comprise at least one electrical wiring harness.

11. The multiple accessory support bracket of claim 10, wherein at least one of the secondary fasteners pass through an electrical wiring harness clamp and fasten to at least one of the secondary bracket attachment points to mount the electrical wiring harness on the multiple accessory support bracket.

12. The multiple accessory support bracket of claim 1, wherein the accessories comprise at least one fuel tube assembly.

13. The multiple accessory support bracket of claim 12, wherein at least one of the secondary fasteners pass through a fuel tube assembly clamp and fasten to at least one of the secondary bracket attachment points to mount the fuel tube assembly on the multiple accessory support bracket.

14. The multiple accessory support bracket of claim 1, wherein the accessories comprise at least one pneumatic tube assembly.

15. The multiple accessory support bracket of claim 14, wherein at least one of the secondary fasteners pass through a pneumatic tube assembly clamp and fasten to at least one of the secondary bracket attachment points to mount the pneumatic tube assembly on the multiple accessory support bracket.

16. A passive gearless multiple accessory support bracket that supports a plurality of external accessories for an auxiliary power unit (APU), comprising:

an attachment surface with a shape and contour that form-fits with a mating surface on the APU;

an accessory mounting surface on a side of the accessory support bracket generally opposite the attachment surface;

a plurality of primary bracket attachment points on the multiple accessory support bracket that comprise vibration isolators for attaching the multiple accessory support bracket to the mating surface on the APU;

a plurality of primary fasteners that pass through the primary bracket attachment points to fasten the accessory mounting bracket to APU attachment points on the mating surface of the APU;

a plurality of secondary bracket attachment points along the accessory mounting surface for mounting the accessories on the multiple accessory support bracket; and

a plurality of secondary fasteners that fasten the accessories to the secondary bracket attachment points to mount the accessories on the multiple accessory support bracket.

17. The multiple accessory support bracket of claim 16, wherein the accessories comprise at least one line replaceable unit (LRU).

18. The multiple accessory support bracket of claim 17, wherein the LRU comprises a fuel control unit (FCU).

19. The multiple accessory support bracket of claim 18, wherein the LRU comprises an exciter.

20. The multiple accessory support bracket of claim 18, wherein the LRU comprises a data memory module (DMM).

21. The multiple accessory support bracket of claim 16, wherein the accessories comprise at least one electrical wiring harness.

22. The multiple accessory support bracket of claim 21, wherein at least one of the secondary fasteners pass through an electrical wiring harness clamp and fasten to at least one of the secondary bracket attachment points to mount the electrical wiring harness on the multiple accessory support bracket.

23. The multiple accessory support bracket of claim 16, wherein the accessories comprise at least one fuel tube assembly.

24. The multiple accessory support bracket of claim 23, wherein at least one of the secondary fasteners pass through a fuel tube assembly clamp and fasten to at least one of the secondary bracket attachment points to mount the fuel tube assembly on the multiple accessory support bracket.

25. The multiple accessory support bracket of claim 16, wherein the accessories comprise at least one pneumatic tube assembly.

26. The multiple accessory support bracket of claim 25, wherein at least one of the secondary fasteners pass through a pneumatic tube assembly clamp and fasten to at least one of the secondary bracket attachment points to mount the pneumatic tube assembly on the multiple accessory support bracket.