Axial-flow turbine and power plant including the same
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02C-003/34
F02C-007/18
F02C-007/10
F02C-009/20
F01D-009/06
F02C-003/20
F02C-003/22
F02C-003/24
F01K-007/16
F01K-007/18
F01K-007/20
F01K-011/02
F01D-001/02
F01D-025/12
F01D-017/14
F02C-007/12
F02C-003/13
F02C-009/18
F01D-011/00
F02C-009/22
F01D-011/02
출원번호
US-0183753
(2014-02-19)
등록번호
US-9631514
(2017-04-25)
우선권정보
JP-2013-048114 (2013-03-11)
발명자
/ 주소
Onoda, Akihiro
Mimura, Yuki
Ito, Shoko
출원인 / 주소
KABUSHIKI KAISHA TOSHIBA
대리인 / 주소
Oblon, McClelland, Maier & Neustadt, L.L.P.
인용정보
피인용 횟수 :
1인용 특허 :
13
초록▼
An axial-flow turbine according to an embodiment includes a plurality of nozzle structures and a plurality of blade structures. At least one nozzle structure includes an outer ring diaphragm and an inner ring diaphragm. The outer ring diaphragm and the inner ring diaphragm form an annular opening po
An axial-flow turbine according to an embodiment includes a plurality of nozzle structures and a plurality of blade structures. At least one nozzle structure includes an outer ring diaphragm and an inner ring diaphragm. The outer ring diaphragm and the inner ring diaphragm form an annular opening portion which extends in a circumferential direction therebetween. A nozzle is provided in a portion of a region of the annular opening portion in the circumferential direction, and a closing part is provided in another portion of the region of the annular opening portion in the circumferential direction. The closing part closes this other portion of the region to prevent a working fluid from flowing into this other portion of the region. A closing part medium passage is provided in the closing part and is configured to flow a cooling medium which cools the closing part.
대표청구항▼
1. An axial-flow turbine comprising: a plurality of nozzle structures supported by a casing; anda plurality of blade structures supported by a turbine rotor which is rotatable against the casing, the nozzle structure and the blade structure alternately arranged in an axial direction of the turbine r
1. An axial-flow turbine comprising: a plurality of nozzle structures supported by a casing; anda plurality of blade structures supported by a turbine rotor which is rotatable against the casing, the nozzle structure and the blade structure alternately arranged in an axial direction of the turbine rotor, whereinat least one nozzle structure among the plurality of nozzle structures includes:an outer ring diaphragm supported by the casing;an inner ring diaphragm provided in an inner circumferential side of the outer ring diaphragm, the outer ring diaphragm and the inner ring diaphragm forming an annular opening portion which extends in a circumferential direction therebetween,a nozzle provided in a portion of a region of the annular opening portion in the circumferential direction,a closing part provided in another portion of the region of the annular opening portion in the circumferential direction, the closing part closing said other portion of the region to prevent a working fluid from flowing into said other portion of the region, anda closing part medium passage provided in the closing part, the closing part medium passage being configured to flow a cooling medium which cools the closing part. 2. The axial-flow turbine according to claim 1, wherein the closing part includes a pair of closing plates arranged apart from each other in the axial direction of the turbine rotor, anda cooling pipe including the closing part medium passage is provided on an inner surface or an outer surface of the closing plate. 3. The axial-flow turbine according to claim 1, wherein the closing part includes a pair of closing plates arranged apart from each other in an axial direction of the turbine rotor,a closed space is formed between the pair of closing plates, andthe closed space is constituted as the closing part medium passage. 4. The axial-flow turbine according to claim 1, wherein a medium supply pipe configured to supply the cooling medium is connected to the closing part medium passage. 5. The axial-flow turbine according to claim 1, wherein a medium discharge pipe configured to discharge the cooling medium from the closing part medium passage is connected to the closing part medium passage. 6. The axial-flow turbine according to claim 1, wherein each of the plurality of the nozzle structures includes the closing part medium passage, andthe closing part medium passage of one of the nozzle structures and the closing part medium passage of another nozzle structure are connected with each other via a medium connecting pipe. 7. The axial-flow turbine according to claim 2, wherein the closing part further includes an end plate connecting circumferential end portions of the closing plates, anda second cooling pipe including a second closing part medium passage configured to flow a cooling medium which cools the end plate is provided on an inner surface of the end plate. 8. The axial-flow turbine according to claim 7, wherein the second cooling pipe extends in a radial direction of the turbine rotor. 9. The axial-flow turbine according to claim 1, wherein an outer ring medium passage configured to flow a cooling medium which cools the outer ring diaphragm is provided in the outer ring diaphragm. 10. The axial-flow turbine according to claim 1, wherein an inner ring medium passage configured to flow a cooling medium which cools the inner ring diaphragm is provided in the inner ring diaphragm. 11. The axial-flow turbine according to claim 1, wherein the closing part includes a plurality of closing part segments divided in the circumferential direction, andthe closing part medium passage is provided in each of the closing part segments. 12. The axial-flow turbine according to claim 1, wherein a discharge hole configured to discharge the cooling medium in the closing part medium passage to an outside of the closing part is provided in the closing part. 13. The axial-flow turbine according to claim 1, wherein a medium discharge passage configured to discharge a cooling medium from the closing part medium passage is connected to the closing part medium passage, andthe medium discharge passage is configured to discharge a cooling medium into a region between the inner ring diaphragm and the turbine rotor. 14. The axial-flow turbine according to claim 1, wherein a combustion gas produced by a combustor, as the working fluid, is guided to the nozzle of the nozzle structure arranged in a most upstream side among the plurality of the nozzle structures by a flow guiding portion,the flow guiding portion is connected to the nozzle structure via a seal connecting portion,the flow guiding portion includes an outlet side end portion, andthe seal connecting portion includes an outer ring side seal plate extending from the outlet side end portion to the outer ring diaphragm, an inner ring side seal plate extending from the outlet side end portion to the inner ring diaphragm, and a pair of end portion side seal plates extending from the outlet side end portion to a circumferential end portion of the closing part. 15. A power plant comprising: an oxygen producing apparatus extracting oxygen from air by removing nitrogen,a combustor producing a combustion gas by combusting a fuel with oxygen extracted by the oxygen producing apparatus,the axial-flow turbine according to claim 1, the axial-flow turbine being rotationally driven by the combustion gas which is produced by the combustor and is supplied to the axial-flow turbine as the working fluid,a generator generating power by the rotational driving of the axial-flow turbine,a cooler cooling an exhaust gas exhausted from the axial-flow turbine,a moisture separator separating and removing moisture in the exhaust gas which is cooled by the cooler, to regenerate the exhaust gas,a compressor compressing the regenerative gas regenerated by the moisture separator, anda regenerative heat exchanger heat-exchanging between the regenerative gas compressed by the compressor and the exhaust gas which flows from the axial-flow turbine toward the cooler, whereina portion of the regenerative gas heat-exchanged in the regenerative heat exchanger is supplied to the combustor, and a remaining portion of the regenerative gas is supplied to the closing part medium passage of the axial-flow turbine as the cooling medium.
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이 특허에 인용된 특허 (13)
Andersen, Leonard M., Apparatus for distributing fluid into a gas turbine.
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