COAL NOZZLE TIP SHROUD

• US 20080304956A1
• Filed: 06/05/2007
• Published: 12/11/2008
• Est. Priority Date: 06/05/2007
• Status: Active Grant

• Current Assignee: General Electric Technology GmbH (GE Aerospace)
• Original Assignee: Alstom Technology Ltd. (Alstom SA)
• Inventors: Mann, Jeffrey S.
• Granted Patent: US 8,267,020 B2
• Time in Patent Office: Days
• US Class Current: 415/115
• CPC Class Codes: F23C 5/02 Structural details of mounting
• CPC Class Codes: F23D 1/00 Burners for combustion of pulverulent fuel disposition of burners F23C
• CPC Class Codes: F23D 2201/101 tiltable
• CPC Class Codes: F23D 2213/00 Burner manufacture specifications
• CPC Class Codes: Y10T 29/49432 Nozzle making
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

An outer shroud for a solid fuel nozzle tip includes: an top shell portion and a bottom shell portion, each portion fabricated from a preform produced from a single sheet of flat stock and each shell portion including a forward area and a backward area and outlet sidewalls, wherein a right outlet sidewall and a left outlet sidewall are each separated from the forward area by a rounded corner; and a left inlet sidewall and a right inlet sidewall coupled to the top shell portion and the bottom shell portion

Claims

1. An outer shroud for a solid fuel nozzle tip, the outer shroud comprising:

an top shell portion and a bottom shell portion, each portion fabricated from a preform produced from a single sheet of flat stock and each shell portion comprising a forward area and a backward area and outlet sidewalls, wherein a right outlet sidewall and a left outlet sidewall are each separated from the forward area by a rounded corner; and

a left inlet sidewall and a right inlet sidewall coupled to the top shell portion and the bottom shell portion.

2. The outer shroud as in claim 1, wherein each of the shell portions are coupled together by at least one weld point along respective outlet sidewall portions.

3. The outer shroud as in claim 1, wherein each of the shell portions are coupled together by at least one weld point along one of the left outlet sidewall and the right outlet sidewall.

4. The outer shroud as in claim 1, wherein at least one of the inlet sidewalls comprises a plurality of annulus.

5. The outer shroud as in claim 1, further comprising at least one joiner plate coupled to an inlet sidewall.

6. The outer shroud as in claim 5, wherein the joiner plate is mounted by at least one of a weld and additional hardware.

7. The outer shroud as in claim 1, wherein the preform comprises at least one slit adapted for shaping of the preform.

8. A method for fabricating an outer shroud for a solid fuel nozzle tip, the method comprising:

selecting a preform cut from flat stock for each of a top shell portion and a bottom shell portion;

shaping each preform to form the top shell portion and the bottom shell portion;

bending each preform to form outlet sidewalls and rounded corners for each shell portion; and

coupling the top shell portion and the bottom shell portion.

9. The method as in claim 8, wherein coupling comprises one of welding and installing additional hardware.

10. The method as in claim 8, further comprising coupling inlet sidewalls to each of the top and bottom shell portions.

11. The method as in claim 8, wherein coupling inlet sidewalls comprises one of welding and installing additional hardware.

12. The method as in claim 8, wherein shaping comprises at least one of bending and folding.