EP2128386A3 - Method for reducing water drop erosion in steam turbines by controlling the drop size and corresponding steam turbine - Google Patents

Method for reducing water drop erosion in steam turbines by controlling the drop size and corresponding steam turbine Download PDF

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Publication number
EP2128386A3
EP2128386A3 EP09161199A EP09161199A EP2128386A3 EP 2128386 A3 EP2128386 A3 EP 2128386A3 EP 09161199 A EP09161199 A EP 09161199A EP 09161199 A EP09161199 A EP 09161199A EP 2128386 A3 EP2128386 A3 EP 2128386A3
Authority
EP
European Patent Office
Prior art keywords
vanes
droplets
controlling
steam turbine
size
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.)
Granted
Application number
EP09161199A
Other languages
German (de)
French (fr)
Other versions
EP2128386B1 (en
EP2128386A2 (en
Inventor
Thomas Hammer
Tetsuo Kishimoto
Norbert Sürken
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP2128386A2 publication Critical patent/EP2128386A2/en
Publication of EP2128386A3 publication Critical patent/EP2128386A3/en
Application granted granted Critical
Publication of EP2128386B1 publication Critical patent/EP2128386B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F01D25/32—Collecting of condensation water; Drainage ; Removing solid particles
    • 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
    • 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
    • F05D2240/00—Components
    • F05D2240/10—Stators
    • F05D2240/12—Fluid guiding means, e.g. vanes
    • F05D2240/122—Fluid guiding means, e.g. vanes related to the trailing edge of a stator vane
    • 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
    • F05D2240/00—Components
    • F05D2240/20—Rotors
    • F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05D2240/304—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the trailing edge of a rotor blade
    • 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
    • F05D2270/00—Control
    • F05D2270/01—Purpose of the control system
    • F05D2270/11—Purpose of the control system to prolong engine life
    • F05D2270/114—Purpose of the control system to prolong engine life by limiting mechanical stresses
    • 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
    • F05D2270/00—Control
    • F05D2270/01—Purpose of the control system
    • F05D2270/17—Purpose of the control system to control boundary layer
    • F05D2270/172—Purpose of the control system to control boundary layer by a plasma generator, e.g. control of ignition
    • 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
    • F05D2270/00—Control
    • F05D2270/60—Control system actuates means
    • F05D2270/62—Electrical actuators

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

Bei Dampfturbinen bilden sich durch die Kondensation in der Dampfströmung Primärtropfen von Wasser, die sich teilweise an den Leitschaufeln ablagern. Weiterhin entstehen an und hinter den Leitschaufeln Sekundärtropfen, die ein erheblich größeres Volumen als die Primärtropfen haben. Gemäß der Erfindung wird durch elektrische Felder an den Leitschaufeln die Größe der Sekundärtropfen beim Tropfenabriss an der Hinterkante der Leitschaufeln zumindest reduziert, wobei aufgrund der elektrostatischen Kräfte es zu einem vorzeitigen Abriss der Wassertropfen und damit zu einer reduzierten Sekundärtropfengröße kommt. Bei der zugehörigen Dampfturbine, die Leitschaufeln einerseits und nachfolgende Laufschaufel andererseits aufweist, werden durch die Turbinenschaufeln Elektroden gebildet, indem Lauf- und Leitschaufeln auf unterschiedliches elektrisches Potential legbar sind.

Figure imgaf001
In steam turbines, the condensation in the vapor flow causes primary droplets of water to form, which are partly deposited on the vanes. Furthermore, secondary drops are formed on and behind the vanes, which have a considerably larger volume than the primary droplets. According to the invention, the size of the secondary drops is at least reduced by dropping droplets at the trailing edge of the vanes by electric fields on the vanes, which due to the electrostatic forces it comes to a premature demolition of the water droplets and thus to a reduced secondary droplet size. In the associated steam turbine, the guide vanes on the one hand and subsequent blade on the other hand, are formed by the turbine blades electrodes by runners and vanes are set to different electrical potential.
Figure imgaf001
EP20090161199 2008-05-30 2009-05-27 Method for reducing water drop erosion in steam turbines by controlling the drop size and corresponding steam turbine Not-in-force EP2128386B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200810026031 DE102008026031A1 (en) 2008-05-30 2008-05-30 Method for reducing drop impact erosion in steam turbines by controlling the droplet size and associated steam turbine

Publications (3)

Publication Number Publication Date
EP2128386A2 EP2128386A2 (en) 2009-12-02
EP2128386A3 true EP2128386A3 (en) 2010-12-15
EP2128386B1 EP2128386B1 (en) 2014-04-02

Family

ID=40829057

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20090161199 Not-in-force EP2128386B1 (en) 2008-05-30 2009-05-27 Method for reducing water drop erosion in steam turbines by controlling the drop size and corresponding steam turbine

Country Status (2)

Country Link
EP (1) EP2128386B1 (en)
DE (1) DE102008026031A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103133065B (en) * 2011-11-30 2015-09-09 高德伟 Steam turbine outer rim internal surface dries dividing plate
SE1400492A1 (en) 2014-01-22 2015-07-23 Climeon Ab An improved thermodynamic cycle operating at low pressure using a radial turbine
IT202200000209A1 (en) * 2022-01-10 2023-07-10 Verme Massimo SYSTEM FOR REGULATING THE FLOW AROUND A HYDROFOIL BY MEANS OF ELECTROSTATIC FORCE
CN114776390B (en) * 2022-04-21 2023-06-20 西安交通大学 Last-stage stationary blade dehumidification structure based on ultrasonic waves

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3859005A (en) * 1973-08-13 1975-01-07 Albert L Huebner Erosion reduction in wet turbines
US20020174655A1 (en) * 2001-05-22 2002-11-28 Tarelin Anatoly Oleksiovych Device to increase turbine efficiency by removing electric charge from steam
US20050207880A1 (en) * 2003-01-14 2005-09-22 Tarelin Anatoly O Electrostatic method and device to increase power output and decrease erosion in steam turbines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3859005A (en) * 1973-08-13 1975-01-07 Albert L Huebner Erosion reduction in wet turbines
US20020174655A1 (en) * 2001-05-22 2002-11-28 Tarelin Anatoly Oleksiovych Device to increase turbine efficiency by removing electric charge from steam
US20050207880A1 (en) * 2003-01-14 2005-09-22 Tarelin Anatoly O Electrostatic method and device to increase power output and decrease erosion in steam turbines

Also Published As

Publication number Publication date
EP2128386B1 (en) 2014-04-02
DE102008026031A1 (en) 2009-12-03
EP2128386A2 (en) 2009-12-02

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