Thermal and acoustic insulation assembly and method for an exhaust duct of a rotary machine
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F01D-025/30
F16L-059/12
출원번호
US-0569149
(2014-12-12)
등록번호
US-10072527
(2018-09-11)
우선권정보
EP-14305776 (2014-05-23)
발명자
/ 주소
Bracquemart, Eric
Baranzize, Didier
출원인 / 주소
General Electric Company
대리인 / 주소
Nixon & Vanderhye P.C.
인용정보
피인용 횟수 :
0인용 특허 :
11
초록▼
A thermal acoustic insulation structure including: a metal internal sheet having an exposed surface configured to be exposed to a hot gas, an external sheet and an insulation sandwiched between the internal and external sheets; a bar secured to the metal internal sheet and extending through at least
A thermal acoustic insulation structure including: a metal internal sheet having an exposed surface configured to be exposed to a hot gas, an external sheet and an insulation sandwiched between the internal and external sheets; a bar secured to the metal internal sheet and extending through at least a portion of the insulation; a bracket connected to the external sheet or to a support plate extending from the external sheet, wherein the bracket includes an opening configured to receive an end of the bar; a fastener securing the end of the bar to the bracket, and an insulating washer separating the bracket from the bar and the fastener.
대표청구항▼
1. A thermal acoustic insulation structure comprising: a hot gas passage open at opposite ends of the structure, wherein the hot gas passage is configured for a hot gas flow;a metal internal sheet having an exposed surface facing and adjacent the hot gas passage and configured to be exposed to the h
1. A thermal acoustic insulation structure comprising: a hot gas passage open at opposite ends of the structure, wherein the hot gas passage is configured for a hot gas flow;a metal internal sheet having an exposed surface facing and adjacent the hot gas passage and configured to be exposed to the hot gas flow, an external sheet and an insulation sandwiched between the internal and external sheets;a bar secured to the metal internal sheet and extending through at least a portion of the insulation;a bracket connected to the external sheet, wherein the bracket includes an opening configured to receive a first end of the bar, wherein the bracket offsets the first end of the bar from the external sheet;a first fastener securing the first end of the bar to the bracket;an insulating washer separating the bracket from the bar;the insulating washer separating the bracket from the first fastener, anda second fastener securing a second end of the bar to the metal internal sheet. 2. The thermal acoustic insulation structure of claim 1, wherein the bracket has an inverted U-shape in cross section. 3. The thermal acoustic insulation structure of claim 1, further comprising an insulation layer separating legs of the bracket from the external sheet. 4. The thermal acoustic insulation structure of claim 1, wherein the insulating washer is formed of at least one of a ceramic, fiber glass reinforced composite and Polytetrafluoroethylene (PTFE). 5. The thermal acoustic insulation structure of claim 1, wherein the bracket extends the length of the thermal acoustic insulation structure. 6. The thermal acoustic insulation structure of claim 1, wherein the bracket includes additional openings each configured to receive another bar of the structure. 7. The thermal acoustic insulation structure of claim 1, wherein the first fastener is a nut on a threaded end of the bar and the nut is between a bridge of the bracket and the external sheet. 8. An exhaust gas duct comprising: a gas passage, anda wall of the gas passage, wherein the wall forms a closed perimeter of a cross section of the gas passage, and the wall includes: a metal internal sheet having an exposed surface facing and exposed to the gas passage and configured to be exposed to a hot gas flowing through the gas passage, an external sheet and an insulation layer sandwiched between the internal and external sheets;a bar secured to the metal internal sheet, extending through at least a portion of the insulation and secured to the external sheet, wherein the bar is configured to hold together the metal internal sheet, insulation and external sheet;a bracket fixed to the external sheet, wherein the bracket includes an opening configured to receive a first end of the bar, wherein the bracket separates first end of the bar and the internal sheet;a first fastener securing the first end of the bar to the bracket;an insulating washer separating the bracket from the bar;the insulating washing separating the bracket from the first fastener, anda second fastener securing a second end of the bar to the external sheet. 9. The exhaust gas duct of claim 8, wherein the bracket has an inverted U-shape in cross section. 10. The exhaust gas duct of claim 8, wherein the insulating washer is formed of at least one of a ceramic, a ceramic, fiber glass reinforced composite and Polytetrafluoroethylene (PTFE). 11. The exhaust gas duct of claim 8, wherein the bracket extends the length of the thermal acoustic insulation structure. 12. The exhaust gas duct of claim 8, wherein the bracket includes additional openings each configured to receive another bar of the thermal acoustic insulation structure. 13. The exhaust gas duct of claim 8, wherein the first fastener is a nut on a threaded end of the bar and the nut is between a bridge of the bracket and the external sheet. 14. A method to assemble a thermal acoustic wall structure comprising: sandwiching an insulation layer between a metal internal sheet having an exposed surface configured to be exposed to a hot gas and an external sheet, wherein the exposed surface is adjacent and faces a hot gas passage extending through the thermal acoustic wall structure;fastening a second end of a bar to the metal internal sheet and extending the bar through at least a portion of the insulation;inserting a first end of the bar into a bracket fixed to the external sheet, wherein the bracket includes an opening configured to receive the first end of the bar;fastening the first end of the bar to the bracket, wherein the bracket offsets the first end of the bar from the external sheet, andinstalling an insulating washer to separate the bracket from the bar and to separate the bracket from the fastener,wherein the bar holds together the metal internal sheet, insulation and external sheet. 15. The method of claim 14, further comprising arranging the thermal acoustic wall structure in an annular array to form a gas passage in an exhaust duct for a rotary machine. 16. The method of claim 14, further comprising adjusting the fastening of the bar to the internal sheet or to the bracket, wherein the adjustment determines a distance between the internal sheet and the external sheet. 17. The method of claim 14, further comprising adjusting the fastening of the bar to the internal sheet or to the bracket, wherein the adjustment determines a compression of the insulation layer. 18. The thermal acoustic insulation structure of claim 1, wherein the insulating washer comprises a plurality of insulating washers, wherein a first insulating washer separates the bracket from the bar and a second insulating washer separates the bracket from the fastener. 19. The exhaust gas duct of claim 8, wherein the insulating washer comprises a plurality of insulating washers, wherein a first insulating washer separates the bracket from the bar and a second insulating washer separates the bracket from the fastener. 20. The thermal acoustic insulation structure of claim 1, wherein the end of the bar is located between the bracket and the external sheet.
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