IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0078101
(2008-03-27)
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등록번호 |
US-8104291
(2012-01-31)
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발명자
/ 주소 |
- Myers, Geoffrey David
- Yu, Xiaoguang
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출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
13 인용 특허 :
3 |
초록
▼
An improved floating collar assembly for gas turbine combustion units consists of a sheet metal collar with a flat flange and an E seal that is pre-compressed within a block of epoxy. The collar fits over a corresponding fuel nozzle burner tube and is retained on a cap assembly by a flat plate. Duri
An improved floating collar assembly for gas turbine combustion units consists of a sheet metal collar with a flat flange and an E seal that is pre-compressed within a block of epoxy. The collar fits over a corresponding fuel nozzle burner tube and is retained on a cap assembly by a flat plate. During assembly, the collar is loose so that it floats, which makes cap assembly easy. During operation, the epoxy used to pre-compress the E seal heats up and burns off, whereupon the E seal opens up and produces a seating load between the collar and plate that is high enough to keep the collar from rotating and thereby reduce collar wear.
대표청구항
▼
1. At least one floating collar assembly for a cap of a combustion unit containing at least one fuel nozzle assembly corresponding to the at least one floating collar assembly, each of the at least one fuel nozzle assemblies including a fuel nozzle burner tube, each of the at least one floating coll
1. At least one floating collar assembly for a cap of a combustion unit containing at least one fuel nozzle assembly corresponding to the at least one floating collar assembly, each of the at least one fuel nozzle assemblies including a fuel nozzle burner tube, each of the at least one floating collar assemblies comprising: a floating collar positioned around a side wall of a corresponding fuel nozzle burner tube, the collar including a flange for engaging the cap, the flange being substantially parallel to the side wall of the burner tube when the floating collar is positioned around the side wall, anda sealing spring positioned between the flange and a plate attached to the cap, the plate being substantially parallel to the side wall of the burner tube when the cap and plate are positioned over the burner tube, the sealing spring producing a seating load between the collar flange and the plate to hold the flange against the cap and thereby prevent the floating collar from rotating during combustion unit operation. 2. The floating collar assembly of claim 1, wherein the collar is substantially circular and positioned over an exterior of the fuel nozzle burner tube so as to engage a shoulder in the tube exterior when the cap is attached to the combustion unit. 3. The floating collar assembly of claim 2, wherein the sealing spring is substantially circular and extends around the exterior of the fuel nozzle burner tube when the cap is attached to the combustion unit. 4. A floating collar assembly for a combustion unit cap, the floating collar assembly comprising: a collar including a flange for engaging the cap, anda sealing spring positioned between the flange and a plate attached to the cap, the sealing spring producing a seating load between the collar flange and the plate to hold the flange against the cap and thereby prevent the collar from rotating during combustion unit operation,wherein the collar is substantially circular and positioned over an exterior of a fuel nozzle burner tube so as to engage a shoulder in the tube exterior when the cap is attached to the combustion unit, andwherein the collar has a first curve that engages the tube exterior at a first location and a second curve that engages the tube exterior at the tube shoulder. 5. The floating collar assembly of claim 1, wherein, during assembly of the cap to the combustion unit, the collar is loose. 6. The floating collar assembly of claim 5, wherein, during assembly of the cap to the combustion unit, the sealing spring is held in a compressed position by epoxy. 7. The floating collar assembly of claim 6, wherein, during combustion unit operation, the epoxy heats up and burns off, whereupon the sealing spring is decompressed and produces a seating load between the collar flange and plate so as to keep the collar from spinning during combustion unit operation to thereby reduce collar wear. 8. The floating collar assembly of claim 1, wherein the sealing spring has a shape, in cross-section, that is similar the capital letter “E”. 9. The floating collar assembly of claim 8, wherein the sealing spring has a center section shaped like a hairpin and two curved ends that connect at one end to center section to complete the cross-sectional “E” shape of the sealing spring. 10. The floating collar assembly of claim 1, wherein the cap includes a shoulder, which is engaged by the flange of the floating collar. 11. At least one floating collar assembly for a cap of a combustion unit containing at least one fuel nozzle assembly corresponding to the at least one floating collar assembly, each of the at least one fuel nozzle assemblies including a corresponding fuel nozzle burner tube, each of the at least one floating collar assemblies comprising: a substantially circular floating collar positioned around a side wall of a corresponding fuel nozzle burner tube, the collar including a flat flange for engaging the cap, the flange being substantially parallel to the side wall of the burner tube when the floating collar is positioned around the side wall, anda substantially circular, compressible sealing spring positioned between the flat flange and a flat plate attached to a back side of the cap, the plate being more perpendicular than parallel to the side wall of the burner tube when the cap and plate are positioned over the burner tube, the sealing spring producing a seating load between the collar flange and the flat plate to thereby hold the flange against the cap and prevent the floating collar from rotating during combustion unit operation. 12. The floating collar assembly of claim 11, wherein the collar is positioned over an exterior of the fuel nozzle burner tube so as to engage a shoulder in the tube exterior and the sealing spring extends around the exterior of the fuel nozzle burner tube when the cap is attached to the combustion unit. 13. A floating collar assembly for a combustion unit cap, the floating collar assembly comprising: a substantially circular collar including a flat flange for engaging the cap, anda substantially circular, compressible sealing spring positioned between the flat flange and a flat plate attached to a back side of the cap, the sealing spring producing a seating load between the collar flange and the flat plate to thereby hold the flange against the cap and prevent the collar from rotating during combustion unit operation,wherein the collar is positioned over an exterior of a fuel nozzle burner tube so as to engage a shoulder in the tube exterior and the sealing spring extends around the exterior of the fuel nozzle burner tube when the cap is attached to the combustion unit, andwherein the collar has a curvy shape, such that as it extends from the flat flange, it curves towards and away from the exterior of the fuel nozzle burner tube, whereby a first curve of the collar engages the tube exterior at a first location and a second curve of the collar engages the tube exterior at the tube shoulder. 14. The floating collar assembly of claim 11, wherein, during cap assembly, the collar is loose so that it floats and the sealing spring is pre-compressed within a block of epoxy. 15. The floating collar assembly of claim 14, wherein the epoxy heats up and burns off during operation of the combustion unit, whereupon the sealing spring is decompressed and engages the flat flange and flat plate to produce the seating load between the collar and plate that keeps the collar from spinning during combustion unit operation to thereby reduce collar wear. 16. The floating collar assembly of claim 11, wherein the sealing spring has a shape, in cross-section, that is similar the capital letter “E”. 17. The floating collar assembly of claim 16, wherein the sealing spring has a center section shaped like a hairpin and two curved ends that connect at one end to center section to complete the cross-sectional “E” shape of the sealing spring. 18. The floating collar assembly of claim 1, wherein the cap includes a shoulder, which is engaged by the flat flange of the floating collar. 19. A method of securing at least one floating collar within a combustion unit cap to keep the collar from spinning during combustion unit operation to thereby reduce collar wear, the combustion unit containing at least one fuel nozzle assembly corresponding to the at least one floating collar, each of the at least one fuel nozzle assemblies including a corresponding fuel nozzle tube, the method comprising the steps of: providing a circular floating collar around an exterior side wall of a corresponding fuel nozzle burner tube, the collar including a flat flange that is substantially parallel to the side wall of the burner tube when the collar is positioned around the side wall,positioning the collar adjacent to a circular a shoulder formed in the cap,positioning an “E” shaped sealing spring that is pre-compressed in epoxy adjacent to the collar's flat flange,attaching a plate to the cap so as to position the “E” shaped sealing spring between the flat flange and the plate and thereby allow the collar to float between the plate and the shoulder formed in the cap, andattaching the cap to the combustion unit, whereby the collar is positioned over the exterior side wall of the fuel nozzle burner tube so as to engage a shoulder in the tube exterior, the plate being substantially parallel to the exterior side wall of the burner tube when the cap and plate are positioned over the combustion unit. 20. The method of claim 19 further comprising the step of operating the combustion unit so that the epoxy heats up and burns off, whereupon the “E” shaped sealing spring decompresses and engages the flange and plate to produce a seating load between the collar flange and plate that keeps the collar from spinning during combustion unit operation to thereby reduce collar wear.
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