EP0457241B1 - Impulsturbinenstufe mit verminderten Strömungsverlusten - Google Patents

Impulsturbinenstufe mit verminderten Strömungsverlusten Download PDF

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Publication number
EP0457241B1
EP0457241B1 EP91107717A EP91107717A EP0457241B1 EP 0457241 B1 EP0457241 B1 EP 0457241B1 EP 91107717 A EP91107717 A EP 91107717A EP 91107717 A EP91107717 A EP 91107717A EP 0457241 B1 EP0457241 B1 EP 0457241B1
Authority
EP
European Patent Office
Prior art keywords
diaphragm
turbine
turbine stage
disc
vanes
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.)
Expired - Lifetime
Application number
EP91107717A
Other languages
English (en)
French (fr)
Other versions
EP0457241A1 (de
Inventor
François Detanne
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.)
Alstom Holdings SA
Original Assignee
GEC Alsthom SA
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 GEC Alsthom SA filed Critical GEC Alsthom SA
Publication of EP0457241A1 publication Critical patent/EP0457241A1/de
Application granted granted Critical
Publication of EP0457241B1 publication Critical patent/EP0457241B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F01D1/00—Non-positive-displacement machines or engines, e.g. steam turbines
    • F01D1/02—Non-positive-displacement machines or engines, e.g. steam turbines with stationary working-fluid guiding means and bladed or like rotor, e.g. multi-bladed impulse steam turbines
    • 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
    • F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
    • F01D11/001—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between stator blade and rotor
    • 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
    • F01D5/14—Form or construction
    • F01D5/141—Shape, i.e. outer, aerodynamic form
    • F01D5/145—Means for influencing boundary layers or secondary circulations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S415/00—Rotary kinetic fluid motors or pumps
    • Y10S415/914—Device to control boundary layer

Definitions

  • the present invention relates to an action turbine stage comprising a grid of fixed blades integral with the stator of the turbine supporting a diaphragm followed by a grid of movable blades mounted on a disk integral with the rotor of the turbine.
  • the known action turbine stage (FIG. 1) comprises a grid 1 of fixed vanes 2 integral with the stator 3. This grid 1 supports a diaphragm 4 provided with a seal 5 facing the rotor 6 of the turbine .
  • the grid 1 is followed by a grid 7 of movable vanes 8 carried by a disc 9 secured to the rotor 6.
  • a leakage current 10 coming from upstream from the diaphragm 4 passes through the seal 5 and is injected according to a current 11 at the foot of the movable vanes 8.
  • This current 11 disturbs the main flow and therefore reduces the yield . This reduction is very noticeable for the vanes 8 of small elongations (ratio of their height to their chord).
  • the discs 9 are provided with transverse pipes 12 disposed at the same distance R from the axis of the rotor and parallel to the latter. In the pipes were arranged hollow bushings 13 leveling the disc 9 on its downstream face and protruding on the upstream face.
  • This overpressure sets the fluid in the pipes 12 moving from the upstream face to the downstream face of the disc 9.
  • the efficiency of the scoops 15 is increased by the presence of a circumferential groove 17 formed in the diaphragm 4 facing the row of scoops 15.
  • the fluid leaving the pipes 12 serves to supply the diaphragm seal of the following stage, the flow rate of which is generally close to 10 is equal to the flow rate 19 leaving the pipes 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Control Of Turbines (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Claims (4)

  1. Aktionsturbinenstufe mit einem Gitter (1) fester Schaufeln (2), das fest mit dem Stator (3) der Turbine verbunden ist und eine Blende (4) trägt, gefolgt von einem Gitter (7) beweglicher Schaufeln (8), das auf einer mit dem Turbinenrotor (6) fest verbundenen Scheibe (9) angeordnet ist, wobei die Scheibe (9) mit Querkanälen (12) parallel zur Achse des Rotors (6) versehen ist, dadurch gekennzeichnet, daß die Eingänge dieser Kanäle (12), die in den Raum zwischen der Blende (4) und der Scheibe (9) münden, mit Schöpfkellen (15) versehen sind, die in Drehrichtung seitlich geöffnet sind, um das Fluid ins Innere der Kanäle (12) zu drücken.
  2. Aktionsturbinenstufe nach Anspruch 1, dadurch gekennzeichnet, daß jede Kelle (15) aus dem Ende eines Einsatzes (13) besteht, die in dem Kanal und deren Hälfte des Bodens (14) und der aus der Scheibe (19) vorstehende zylindrische Teil entlang einer axialen Ebene der Turbine entfernt sind.
  3. Aktionsturbinenstufe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Blende (4) des Gitters (1) fester Schaufeln (2) mit einer Umfangsnut (17) gegenüber der Reihe von Kellen (15) versehen ist.
  4. Aktionsturbinenstufe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Blende (4) des Gitters (1) fester Schaufeln (2) und die Scheibe (9) des Gitters (7) mit beweglichen Schaufeln (8) nahe dem Fuß der Schaufeln (2, 8) mit einer Dichtung (18) versehen sind.
EP91107717A 1990-05-14 1991-05-13 Impulsturbinenstufe mit verminderten Strömungsverlusten Expired - Lifetime EP0457241B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9005992 1990-05-14
FR909005992A FR2661946B1 (fr) 1990-05-14 1990-05-14 Etage de turbine a action avec pertes secondaires reduites.

Publications (2)

Publication Number Publication Date
EP0457241A1 EP0457241A1 (de) 1991-11-21
EP0457241B1 true EP0457241B1 (de) 1994-12-07

Family

ID=9396585

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91107717A Expired - Lifetime EP0457241B1 (de) 1990-05-14 1991-05-13 Impulsturbinenstufe mit verminderten Strömungsverlusten

Country Status (10)

Country Link
US (1) US5125794A (de)
EP (1) EP0457241B1 (de)
JP (1) JPH04228803A (de)
CN (1) CN1057506A (de)
AT (1) ATE115234T1 (de)
CS (1) CS139491A3 (de)
DE (1) DE69105613T2 (de)
FR (1) FR2661946B1 (de)
MX (1) MX166760B (de)
ZA (1) ZA913636B (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1167695A1 (de) * 2000-06-21 2002-01-02 Siemens Aktiengesellschaft Gasturbine und Gasturbinenleitschaufel
US6779972B2 (en) * 2002-10-31 2004-08-24 General Electric Company Flowpath sealing and streamlining configuration for a turbine
GB0319002D0 (en) 2003-05-13 2003-09-17 Alstom Switzerland Ltd Improvements in or relating to steam turbines
US8047767B2 (en) * 2005-09-28 2011-11-01 General Electric Company High pressure first stage turbine and seal assembly
GB2440344A (en) 2006-07-26 2008-01-30 Christopher Freeman Impulse turbine design
WO2012052740A1 (en) * 2010-10-18 2012-04-26 University Of Durham Sealing device for reducing fluid leakage in turbine apparatus
IT1403416B1 (it) * 2010-12-21 2013-10-17 Avio Spa Rotore palettato di una turbina a gas per motori aeronautici e metodo per il raffreddamento di detto rotore palettato
DE102011121634B4 (de) * 2010-12-27 2019-08-14 Ansaldo Energia Ip Uk Limited Turbinenschaufel
EP2520764A1 (de) * 2011-05-02 2012-11-07 MTU Aero Engines GmbH Schaufel mit gekühltem Schaufelfuss
US9702261B2 (en) 2013-12-06 2017-07-11 General Electric Company Steam turbine and methods of assembling the same
JP7202259B2 (ja) * 2019-05-31 2023-01-11 三菱重工業株式会社 蒸気タービン

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE442789A (de) * 1940-09-21
BE530135A (de) * 1953-07-06
GB1230325A (de) * 1969-03-05 1971-04-28
GB1350471A (en) * 1971-05-06 1974-04-18 Secr Defence Gas turbine engine
CH529914A (de) * 1971-08-11 1972-10-31 Mo Energeticheskij Institut Turbinenstufe
BE791162A (fr) * 1971-11-10 1973-03-01 Penny Robert N Rotor de turbine
GB1605282A (en) * 1973-10-27 1987-12-23 Rolls Royce 1971 Ltd Bladed rotor for gas turbine engine
GB1561229A (en) * 1977-02-18 1980-02-13 Rolls Royce Gas turbine engine cooling system
GB2062118B (en) * 1979-11-05 1983-08-24 Covebourne Ltd Turbine
US4453888A (en) * 1981-04-01 1984-06-12 United Technologies Corporation Nozzle for a coolable rotor blade
JPS6014161A (ja) * 1983-07-06 1985-01-24 Ngk Spark Plug Co Ltd 空燃比センサ
US4708588A (en) * 1984-12-14 1987-11-24 United Technologies Corporation Turbine cooling air supply system
US4674955A (en) * 1984-12-21 1987-06-23 The Garrett Corporation Radial inboard preswirl system
US4882902A (en) * 1986-04-30 1989-11-28 General Electric Company Turbine cooling air transferring apparatus
US4666368A (en) * 1986-05-01 1987-05-19 General Electric Company Swirl nozzle for a cooling system in gas turbine engines
US4761116A (en) * 1987-05-11 1988-08-02 General Electric Company Turbine blade with tip vent
DE3835932A1 (de) * 1988-10-21 1990-04-26 Mtu Muenchen Gmbh Vorrichtung zur kuehlluftzufuehrung fuer gasturbinen-rotorschaufeln

Also Published As

Publication number Publication date
FR2661946A1 (fr) 1991-11-15
US5125794A (en) 1992-06-30
FR2661946B1 (fr) 1994-06-10
ATE115234T1 (de) 1994-12-15
ZA913636B (en) 1992-02-26
JPH04228803A (ja) 1992-08-18
CN1057506A (zh) 1992-01-01
CS139491A3 (en) 1992-01-15
EP0457241A1 (de) 1991-11-21
DE69105613T2 (de) 1995-04-27
DE69105613D1 (de) 1995-01-19
MX166760B (es) 1993-02-02

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