[특허]Steam turbine rotor and method of assembling the same

General Electric Company

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특허 상세정보

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내보내기 페이스북 공유 트위터 공유 카카오톡 공유

Steam turbine rotor and method of assembling the same

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F01D-005/06 F01D-005/10
미국특허분류(USC)	415/216.1; 415/119; 415/229; 416/144
출원번호	US-0044607 (2008-03-07)
등록번호	US-8282349 (2012-10-09)
발명자 / 주소	Cooper, Gregory Edward
출원인 / 주소	General Electric Company
대리인 / 주소	Armstrong Teasdale LLP
인용정보	피인용 횟수 : 0 인용 특허 : 9

초록

A steam turbine rotor is provided. The rotor includes at least one bearing section coupled axially to a steampath section including at least one end, the at least one end further including a flange and a bore, the flange and the bore configured to be coupled to the at least bearing section.

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1. A steam turbine rotor comprising: at least one bearing section comprising a rotor portion and an interference portion extending outwardly from said rotor portion, said interference portion comprising a radially outer surface; anda steampath section comprising a flange extending outwardly from at least one end, said flange comprising a radially inner surface defining a bore, said bore sized to receive said interference portion therein such that said interference portion outer surface is positioned adjacent to said flange inner surface to enable said at least one bearing section to couple to said steampath section,wherein the flange further comprises an annular end surface comprising a first plurality of circumferentially-spaced openings sized to receive a fastener that couples said bearing section to said steampath section, and a second plurality of circumferentially-spaced openings sized to receive an alignment mechanism for aligning said bearing section and said steampath section, centers of said first plurality of openings and said second plurality of openings being a substantially same radial distance from a central rotational axis of the rotor. 2. The steam turbine rotor in accordance with claim 1, wherein the at least one bearing section further comprises: a rim portion extending radially outwardly from the rotor portion, said rim portion configured to provide an area for fastening the at least one bearing section to the steampath section. 3. The steam turbine rotor in accordance with claim 2, wherein the rim portion further comprises: a fastening system including said fastener configured to couple the at least one bearing section to the steampath section;an alignment system including said alignment mechanism configured to ensure the rim portion is substantially axially and concentrically aligned with the central rotational axis of the rotor; anda balancing system configured to reduce vibration in the rotor. 4. The steam turbine rotor in accordance with claim 3, wherein the balancing system further comprises: at least one balancing plug aperture spaced circumferentially around an outer surface of the rim portion; andat least one balancing plug. 5. The steam turbine rotor in accordance with claim 3, wherein the second plurality of openings comprise at least one alignment mechanism opening spaced circumferentially around an outer surface of the rim portion. 6. The steam turbine rotor in accordance with claim 5, wherein the at least one alignment mechanism is a dowel having a first end and an opposite second end configured to facilitate assembly of the rotor. 7. The steam turbine rotor in accordance with claim 3, wherein at least one of said first plurality of openings is spaced circumferentially around an outer surface of the rim portion and comprises a primary bore depth and a counterbore depth; and said fastener further comprises a head section and a body. 8. The steam turbine rotor in accordance with claim 7, wherein the fastener is a bolt having a head portion and a body portion configured to couple the at least one bearing section to the steam path section. 9. The steam turbine rotor in accordance with claim 1, wherein the interference portion is coupled to the steampath section with an interference fit. 10. The steam turbine rotor in accordance with claim 1, wherein the interference portion is coupled to the steampath section with a tapered interference fit. 11. A turbine engine comprising: a turbine; anda rotor extending axially through said turbine, said rotor comprising: at least one bearing section comprising a rotor portion and an interference portion extending outwardly from said rotor portion, said interference portion comprising a radially outer surface; anda steampath section comprising a flange extending outwardly from at least one end, said flange comprising a radially inner surface defining a bore, said bore sized to receive said interference portion therein such that said interference portion outer surface is positioned adjacent to said flange inner surface to enable said at least one bearing section to couple to said steampath section,wherein the flange further comprises an annular end surface comprising a first plurality of circumferentially-spaced openings sized to receive a fastener that couples said bearing section to said steampath section, and a second plurality of circumferentially-spaced openings sized to receive an alignment mechanism for aligning said bearing section and said steampath section, centers of said first plurality of openings and said second plurality of openings being a substantially same radial distance from a central rotational axis of the rotor. 12. The turbine engine in accordance with claim 11, wherein the at least one bearing section further comprises a rim portion extending radially outwardly from the rotor portion. 13. The turbine engine in accordance with claim 12, wherein the rim portion further comprises: a plurality of fastening mechanisms including said fastener configured to couple the at least one bearing section to the steampath section;a plurality of alignment mechanisms configured to ensure the rim portion is substantially axially and concentrically aligned with the central rotational axis of the rotor; anda plurality of balancing mechanisms configured to reduce vibration in the rotor. 14. The turbine engine in accordance with claim 11, wherein the interference portion is coupled to the steampath section with an interference fit. 15. The turbine engine in accordance with claim 11, wherein the interference portion is coupled to the steampath section with a tapered interference fit. 16. A method for assembling a turbine rotor, said method comprising: fabricating a steampath section including a flange extending outwardly from at least one end, wherein the flange includes a radially inner surface that defines a bore therein, and an annular end surface comprising a first plurality of circumferentially-spaced openings sized to receive a fastener that couples said bearing section to said steampath section, and a second plurality of circumferentially-spaced openings sized to receive an alignment mechanism for aligning said bearing section and said steampath section, centers of said first plurality of openings and said second plurality of openings being a substantially same radial distance from a central rotational axis of the rotor;fabricating at least one bearing section including a substantially cylindrical rotor portion, an interference portion extending outwardly from the rotor portion, and a rim portion extending radially outwardly from the rotor portion, the interference portion including a radially outer surface; andcoupling the steampath section to the at least one bearing section such that the interference portion is inserted into the bore of the steampath section and such that the interference portion outer surface is adjacent to the flange inner surface. 17. The method in accordance with claim 16, wherein coupling the steampath section to the at least one bearing section further comprises coupling the steampath section to the at least one bearing section with an interference fit defined between the interference portion and the bore. 18. The method in accordance with claim 16, wherein coupling the steampath section to the at least one bearing section further comprises coupling the steampath section to the at least one bearing section with a tapered interference fit defined between the interference portion and the bore. 19. The method in accordance with claim 16, wherein fabricating the at least one bearing section further comprises including a plurality of alignment mechanisms, a plurality of fastening mechanisms including said fastener, and a plurality of balancing mechanisms.

이 특허에 인용된 특허 (9)

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Steam turbine rotor and method of assembling the same

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특허 상세정보

Steam turbine rotor and method of assembling the same

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이 특허에 인용된 특허 (9)

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IPC 상세정보(version : 201201)

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