EP1772595A2 - Dampfturbinenauslassdiffusor - Google Patents

Dampfturbinenauslassdiffusor Download PDF

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Publication number
EP1772595A2
EP1772595A2 EP06255126A EP06255126A EP1772595A2 EP 1772595 A2 EP1772595 A2 EP 1772595A2 EP 06255126 A EP06255126 A EP 06255126A EP 06255126 A EP06255126 A EP 06255126A EP 1772595 A2 EP1772595 A2 EP 1772595A2
Authority
EP
European Patent Office
Prior art keywords
steam
volute
flow path
exhaust
turbine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06255126A
Other languages
English (en)
French (fr)
Other versions
EP1772595A3 (de
Inventor
Edward Sharrow
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Publication of EP1772595A2 publication Critical patent/EP1772595A2/de
Publication of EP1772595A3 publication Critical patent/EP1772595A3/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/30—Exhaust heads, chambers, or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/28—Supporting or mounting arrangements, e.g. for turbine casing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/30—Application in turbines
    • F05D2220/31—Application in turbines in steam turbines

Definitions

  • the present invention relates to steam turbines and particularly relates to an exhaust diffuser in the shape of a volute.
  • the inner case of the steam turbine for example a double flow down exhaust unit has an encompassing exhaust hood split vertically and extending along opposite sides and ends of the turbine.
  • This large box-like structure houses the entire low pressure section of the turbine.
  • the exhaust steam outlet from the turbine is generally conically shaped and the steam exhaust is redirected from a generally axial extending flow direction to a flow direction 90° relative to the axial flow direction.
  • This 90° flow direction may be in any plane, downwardly, upwardly or transversely.
  • the prior exhaust hoods for steam turbines constitute a large rectilinear structure at the exit end of the conical section for turning and diffusing the steam flow at right angles. The steam flow path was thus tortuous resulting in losses and adverse pressure drop.
  • an axial flow steam turbine flow path comprising: a rotor and a casing defining the axial steam flow path; and an exhaust diffuser for the turbine including a volute for diffusing the exhaust steam and turning the exhaust steam from a generally axial flow direction to a generally transverse and tangential direction.
  • FIG. 1 there is illustrated a portion of a steam turbine, generally designated 10, including a rotor 12 mounting a plurality of turbine buckets 14.
  • An inner casing 16 is also illustrated mounting a plurality of diaphragms 18.
  • a centrally disposed generally radial steam inlet 20 applies steam to each of the turbine buckets and stator blades on opposite axial sides of the turbine to drive the rotor.
  • the stator vanes of the diaphragms 18 and the axially adjacent buckets 14 form the various stages of the turbine forming a flow path and it will be appreciated that the steam is exhausted from the final stage of the turbine for flow into a condenser not shown.
  • an outer exhaust hood 22 which surrounds and supports the inner casing of the turbine as well as other parts such as the bearings.
  • the turbine includes steam guides 24 for guiding the steam exhausting from the turbine into an outlet 26 for flow to one or more condensers.
  • FIG. 2 there is illustrated an aspect of the present invention wherein like reference numerals as in Figure 1 are applied to like parts preceded by the numeral 1.
  • the diffuser 40 includes a diffusing conical section 42 coupled to the inner casing 116 by a flexible joint 44.
  • the volute 40 has an axis parallel to the axis of rotation of the rotor 112.
  • the axis of volute 40 is generally perpendicular to the direction of the general spiral flow about the axis and through the volute. Consequently, the exhaust steam flowing substantially in an axial direction from the final stage of the turbine flows into the volute 40 where it changes its flow direction by about 90°.
  • the volute 40 By using the volute 40, the geometry of the volute enables the steam to expand reducing its pressure.
  • the volute 40 also guides the diffused steam through an outlet 46 coupled to one or more condensers, not shown.
  • the volute 40 includes an internal passage 48 which increases in cross-sectional area in a direction toward the outlet 46 thereby diffusing the exhaust steam.
  • the exit or outlet 46 need not be a down exhaust but can be a side or upwardly directed exhaust.
  • a single volute can exhaust a single flow steam turbine or a pair of volutes may exhaust steam from double flow steam turbines.
  • a double walled volute is illustrated having a divider wall 50 forming a pair of diffuser exit passages.
  • the flexible connection may be of many different types such as an expansion bellows to allow for differential thermal expansion.
  • the previously utilized exhaust hood is no longer necessary for the support of the turbine bearings.
  • the bearings 54 may be supported on stanchions 56 in turn directly supported by the foundation of the turbine.
  • the stanchions provide a rigid support for the bearings with improved turbine reliability as a result.
  • the volute may be formed of a composite material, steel plate or pipe, structural steel, fiber-reinforced plastic or any combination of these materials to obtain the required structural integrity and desired steam flow diffusion characteristics.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
EP06255126A 2005-10-06 2006-10-04 Dampfturbinenauslassdiffusor Withdrawn EP1772595A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/243,974 US20070081892A1 (en) 2005-10-06 2005-10-06 Steam turbine exhaust diffuser

Publications (2)

Publication Number Publication Date
EP1772595A2 true EP1772595A2 (de) 2007-04-11
EP1772595A3 EP1772595A3 (de) 2009-02-25

Family

ID=37395898

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06255126A Withdrawn EP1772595A3 (de) 2005-10-06 2006-10-04 Dampfturbinenauslassdiffusor

Country Status (4)

Country Link
US (1) US20070081892A1 (de)
EP (1) EP1772595A3 (de)
JP (1) JP2007100701A (de)
CN (1) CN1944962A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015156804A1 (en) * 2014-04-10 2015-10-15 Siemens Aktiengesellschaft Gas turbine exhaust system

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110176917A1 (en) * 2004-07-02 2011-07-21 Brian Haller Exhaust Gas Diffuser Wall Contouring
GB2415749B (en) * 2004-07-02 2009-10-07 Demag Delaval Ind Turbomachine A gas turbine engine including an exhaust duct comprising a diffuser for diffusing the exhaust gas produced by the engine
US7785068B2 (en) * 2007-05-17 2010-08-31 General Electric Company Steam turbine exhaust hood and method of fabricating the same
US20100162705A1 (en) * 2008-12-30 2010-07-01 Sharrow Edward J Methods, systems and/or apparatus relating to steam turbine exhaust diffusers
US8161749B2 (en) * 2009-04-07 2012-04-24 General Electric Company Cooled exhaust hood plates for reduced exhaust loss
US8221053B2 (en) * 2009-05-28 2012-07-17 General Electric Company Shaped and stiffened lower exhaust hood sidewalls
US8221054B2 (en) * 2009-05-28 2012-07-17 General Electric Company Corrugated hood for low pressure steam turbine
EP2295732A1 (de) * 2009-09-14 2011-03-16 Alstom Technology Ltd Axialturbine und Verfahren zur Abgabe eines Stroms aus einer Axialturbine
US8668450B2 (en) 2010-12-29 2014-03-11 General Electric Company Removable upper steam guide segment for steam turbine
US8662821B2 (en) 2010-12-29 2014-03-04 General Electric Company Removable steam inlet assembly for steam turbine
CN102588016A (zh) * 2011-01-05 2012-07-18 南阳汉冶特钢有限公司 蜗壳式对称排放器
RU111580U1 (ru) * 2011-02-11 2011-12-20 Альстом Текнолоджи Лтд Выпускное устройство для модуля паровой турбины
US9057287B2 (en) * 2011-08-30 2015-06-16 General Electric Company Butterfly plate for a steam turbine exhaust hood
US9062568B2 (en) * 2011-10-14 2015-06-23 General Electric Company Asymmetric butterfly plate for steam turbine exhaust hood
CN102434233B (zh) * 2011-12-09 2014-05-28 青岛捷能汽轮机集团股份有限公司 一种小型汽轮机的排汽缸
ITFI20120221A1 (it) * 2012-10-22 2014-04-23 Nuovo Pignone Srl "exhaust gas collector and gas turbine"
US20140119910A1 (en) * 2012-10-29 2014-05-01 General Electric Company Turbine exhaust hood and related method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB105933A (en) * 1916-02-04 1917-05-04 Karl Baumann Improvements in or relating to Steam Turbines.
US4390319A (en) * 1979-09-25 1983-06-28 Garkusha Anatoly V Turbine exhaust hood
US4961310A (en) * 1989-07-03 1990-10-09 General Electric Company Single shaft combined cycle turbine

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1269998A (en) * 1915-02-01 1918-06-18 Westinghouse Electric & Mfg Co Steam-turbine.
US1814629A (en) * 1928-10-12 1931-07-14 Westinghouse Electric & Mfg Co Elastic fluid turbine
US1781108A (en) * 1928-12-12 1930-11-11 Worthington Pump & Mach Corp Exhaust connection for condensers
US2047501A (en) * 1934-05-03 1936-07-14 Spontan Ab Steam or gas turbine
US2781057A (en) * 1953-03-06 1957-02-12 Power Jets Res & Dev Ltd Turbine outlet ducting
US2840342A (en) * 1953-03-17 1958-06-24 David H Silvern Turbine exhaust
US5104286A (en) * 1991-02-08 1992-04-14 Westinghouse Electric Corp. Recirculation seal for a gas turbine exhaust diffuser
US6134876A (en) * 1997-11-26 2000-10-24 General Electric Company Gas turbine engine with exhaust expander and compressor
US6419448B1 (en) * 2000-03-20 2002-07-16 Jerzy A. Owczarek Flow by-pass system for use in steam turbine exhaust hoods

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB105933A (en) * 1916-02-04 1917-05-04 Karl Baumann Improvements in or relating to Steam Turbines.
US4390319A (en) * 1979-09-25 1983-06-28 Garkusha Anatoly V Turbine exhaust hood
US4961310A (en) * 1989-07-03 1990-10-09 General Electric Company Single shaft combined cycle turbine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015156804A1 (en) * 2014-04-10 2015-10-15 Siemens Aktiengesellschaft Gas turbine exhaust system
CN106460562A (zh) * 2014-04-10 2017-02-22 西门子公司 燃气轮机排气系统
CN106460562B (zh) * 2014-04-10 2018-06-26 西门子公司 燃气轮机排气系统

Also Published As

Publication number Publication date
EP1772595A3 (de) 2009-02-25
US20070081892A1 (en) 2007-04-12
CN1944962A (zh) 2007-04-11
JP2007100701A (ja) 2007-04-19

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