EP2128387A3 - Method for reducing or avoiding water drop erosion in steam turbines and corresponding steam turbine - Google Patents

Method for reducing or avoiding water drop erosion in steam turbines and corresponding steam turbine Download PDF

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Publication number
EP2128387A3
EP2128387A3 EP09161201A EP09161201A EP2128387A3 EP 2128387 A3 EP2128387 A3 EP 2128387A3 EP 09161201 A EP09161201 A EP 09161201A EP 09161201 A EP09161201 A EP 09161201A EP 2128387 A3 EP2128387 A3 EP 2128387A3
Authority
EP
European Patent Office
Prior art keywords
reducing
steam turbine
water drop
drops
avoiding water
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Withdrawn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
EP09161201A
Other languages
German (de)
French (fr)
Other versions
EP2128387A2 (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 EP2128387A2 publication Critical patent/EP2128387A2/en
Publication of EP2128387A3 publication Critical patent/EP2128387A3/en
Withdrawn legal-status Critical Current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
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
    • 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
    • F05D2260/00—Function
    • F05D2260/95—Preventing corrosion
    • 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
    • F05D2270/60—Control system actuates means
    • F05D2270/62—Electrical actuators

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

Eine Dampfturbine enthält Leitschaufeln und anschließende Laufschaufeln, an denen Flüssigkeit aus dem Dampfstrom kondensiert und als Tröpfchen abgeschieden werden. Dabei entstehen kleine Primärtropfen und größere Sekundärtropfen. Gemäß der Erfindung werden die Sekundärtropfen am Ort der Entstehung in unmittelbarer Nähe dazu zerkleinert, durch die dann besser beschleunigbaren entstandenen kleineren Tröpfchen wird die durch den Tropfenschlag verursachte Erosion verhindert oder zumindest stark vermindert. Die Sekundärtropfen werden auf mechanische Weise, insbesondere durch Ultraschall, zerkleinert.

Figure imgaf001
A steam turbine includes vanes and subsequent blades at which liquid is condensed from the vapor stream and deposited as droplets. This results in small primary drops and larger secondary drops. According to the invention, the secondary drops are comminuted at the place of formation in the immediate vicinity of it, by the resulting better accelerated resulting smaller droplets caused by the drop impact erosion is prevented or at least greatly reduced. The secondary drops are comminuted mechanically, in particular by ultrasound.
Figure imgaf001
EP09161201A 2008-05-30 2009-05-27 Method for reducing or avoiding water drop erosion in steam turbines and corresponding steam turbine Withdrawn EP2128387A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200810026036 DE102008026036A1 (en) 2008-05-30 2008-05-30 Method for reducing or preventing drop impact erosion in a steam turbine and associated steam turbine

Publications (2)

Publication Number Publication Date
EP2128387A2 EP2128387A2 (en) 2009-12-02
EP2128387A3 true EP2128387A3 (en) 2012-05-30

Family

ID=40848277

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09161201A Withdrawn EP2128387A3 (en) 2008-05-30 2009-05-27 Method for reducing or avoiding water drop erosion in steam turbines and corresponding steam turbine

Country Status (2)

Country Link
EP (1) EP2128387A3 (en)
DE (1) DE102008026036A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009056839A1 (en) * 2009-12-03 2011-06-09 Siemens Aktiengesellschaft Method for operating a steam turbine, steam turbine and atomizer
CN114776390B (en) * 2022-04-21 2023-06-20 西安交通大学 Last-stage stationary blade dehumidification structure based on ultrasonic waves
CN115400505B (en) * 2022-09-29 2023-08-22 常州大学 Demisting blade based on secondary entrainment inhibitor
CN116401834B (en) * 2023-03-17 2024-02-13 中国民航大学 Method and device for calculating impact characteristics of water drops of airplane, equipment and storage medium

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3923415A (en) * 1974-06-13 1975-12-02 Westinghouse Electric Corp Steam turbine erosion reduction by ultrasonic energy generation
JPS61106901A (en) * 1984-10-31 1986-05-24 Hitachi Ltd Steam turbine blade cascade device
JPS62251405A (en) * 1986-04-25 1987-11-02 Hitachi Ltd Water drip fining device for steam turbine
JPH04284103A (en) * 1991-03-11 1992-10-08 Mitsubishi Heavy Ind Ltd Stationary blade structure of rotary machine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH502849A (en) * 1969-05-23 1971-02-15 Mitsubishi Heavy Ind Ltd Method and device for generating pulsating forces on parts protruding from a body of revolution
US5867977A (en) * 1996-05-14 1999-02-09 The Dow Chemical Company Method and apparatus for achieving power augmentation in gas turbines via wet compression

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3923415A (en) * 1974-06-13 1975-12-02 Westinghouse Electric Corp Steam turbine erosion reduction by ultrasonic energy generation
JPS61106901A (en) * 1984-10-31 1986-05-24 Hitachi Ltd Steam turbine blade cascade device
JPS62251405A (en) * 1986-04-25 1987-11-02 Hitachi Ltd Water drip fining device for steam turbine
JPH04284103A (en) * 1991-03-11 1992-10-08 Mitsubishi Heavy Ind Ltd Stationary blade structure of rotary machine

Also Published As

Publication number Publication date
EP2128387A2 (en) 2009-12-02
DE102008026036A1 (en) 2009-12-03

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