[특허]Steam turbine and methods of assembling the same

Steam turbine and methods of assembling the same 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F01D-011/02 F01D-009/04 F01D-005/08 F01D-025/12 F01D-009/06 F01D-011/00 F01D-025/24
출원번호	US-0146292 (2014-01-02)
등록번호	US-9574453 (2017-02-21)
발명자 / 주소	Zheng, Xiaoqing Farineau, Thomas Joseph Eldrid, Sacheverel Quentin Bowers, Jason L.
출원인 / 주소	General Electric Company
대리인 / 주소	Armstrong Teasdale LLP
인용정보	피인용 횟수 : 0 인용 특허 : 30

초록 ▼

A steam turbine is provided. The steam turbine includes a housing and a steam inlet configured to discharge a primary steam flow within the housing. A stator is coupled to the housing and a rotor is coupled to the housing and located within the stator. The rotor and the stator are configured to define a primary flow path there between and in flow communication with the primary steam flow. The steam turbine includes a seal assembly coupled to the housing. The seal assembly includes a packing head and a plurality of seals. The packing head is configured to define a cooling flow path in flow communication with the rotor and configured to discharge a cooling steam flow toward the rotor. An anti-swirl device is coupled to the seal assembly and located between the rotor and the packing head.

대표청구항 ▼

1. A steam turbine comprising: a housing comprising an inlet configured to discharge a primary steam flow into said housing;a stator coupled to said housing;a rotor coupled to said housing and located within said stator, said rotor and said stator define a primary flow path there between, said primary flow path is in flow communication with the primary steam flow, said rotor comprising a rotor wheelspace;a seal assembly coupled to said housing, said seal assembly comprising a packing head and a plurality of seals, said packing head defines a cooling flow path that is in flow communication with said rotor at said rotor wheelspace, said cooling flow path is configured to discharge a cooling steam flow towards said rotor wheelspace; andan anti-swirl device coupled to said seal assembly between said rotor wheelspace and said packing head. 2. The steam turbine of claim 1, wherein said anti-swirl device is located within said cooling flow path. 3. The steam turbine of claim 1, wherein said plurality of seals comprises an upstream seal and a downstream seal with respect to said cooling steam flow and said anti-swirl device is coupled to said downstream seal. 4. The steam turbine of claim 3, wherein said anti-swirl device comprises a vane coupled to said downstream seal. 5. The steam turbine of claim 1, wherein said plurality of seals comprises an upstream seal and a downstream seal with respect to the cooling steam flow and said anti-swirl device is located within said cooling flow path and between said rotor wheelspace and said downstream seal. 6. The steam turbine of claim 1, wherein said anti-swirl device comprises a vane and a spring-loaded device coupled to said vane, said spring-loaded device configured to move said vane between a first position and a second position within said cooling flow path. 7. The steam turbine of claim 1, wherein said anti-swirl device comprises a flow deflector. 8. The steam turbine of claim 1, wherein said anti-swirl device comprises a spring-loaded brush. 9. The steam turbine of claim 1, wherein said anti-swirl device is configured to reduce a swirl of the cooling steam flow. 10. The steam turbine of claim 1, wherein said anti-swirl device is configured to reduce a velocity of the cooling steam flow. 11. A rotor assembly coupled to a housing and located within a primary flow path, said rotor assembly comprising: a rotor coupled to the housing and comprising a rotor wheelspace;a seal assembly coupled to said housing, said seal assembly comprising a plurality of seals that define a cooling flow path that is in flow communication with said rotor wheelspace and discharges a cooling steam flow toward said rotor wheelspace; andan anti-swirl device coupled to said seal assembly downstream from said plurality of seals and between said rotor wheelspace and said plurality of seals, said anti-swirl device is configured to reduce a swirl of said cooling steam flow. 12. The rotor assembly of claim 11, wherein said anti-swirl device is located within said cooling flow path. 13. The rotor assembly of claim 11, wherein said plurality of seals comprises an upstream seal and a downstream seal with respect to the cooling steam flow and said anti-swirl device is coupled to said downstream seal. 14. The rotor assembly of claim 11, wherein said plurality of seals comprises an upstream seal and a downstream seal with respect to the cooling steam flow and said anti-swirl device is located within said cooling flow path and between said rotor wheelspace and said downstream seal. 15. The rotor assembly of claim 11, wherein said anti-swirl device comprises a flow deflector. 16. The rotor assembly of claim 11, wherein said cooling flow path is configured to discharge the cooling steam flow at a predetermined pressure toward said rotor wheelspace. 17. A method of assembling a steam turbine, said method comprising: coupling a stator to a housing;coupling a steam inlet in flow communication to the housing;forming a first flow path within the housing and in flow communication with the steam inlet;coupling a rotor to the housing and within the stator, the rotor comprises a rotor wheelspace and a plurality of blades;coupling a seal assembly to the housing, the seal assembly comprising a plurality of seals that define a second flow path in flow communication with the rotor and discharges a second steam flow toward the rotor at the rotor wheelspace; andcoupling an anti-swirl device to the seal assembly downstream from the plurality of seals and between the rotor wheelspace and the plurality of seals. 18. The method of claim 17, wherein coupling the anti-swirl device comprises coupling a vane to a downstream seal of the plurality of seals. 19. The method of claim 17, wherein coupling the anti-swirl device comprises coupling a vane to the seal assembly and within the cooling flow path. 20. The method of claim 17, further comprising coupling a spring mechanism to the anti-swirl device.

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