EP0020433B1 - Grille d'aubes pour turbine et turbine comportant une telle grille d'aubes - Google Patents

Grille d'aubes pour turbine et turbine comportant une telle grille d'aubes Download PDF

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Publication number
EP0020433B1
EP0020433B1 EP79901211A EP79901211A EP0020433B1 EP 0020433 B1 EP0020433 B1 EP 0020433B1 EP 79901211 A EP79901211 A EP 79901211A EP 79901211 A EP79901211 A EP 79901211A EP 0020433 B1 EP0020433 B1 EP 0020433B1
Authority
EP
European Patent Office
Prior art keywords
channel
blade
grid
ceiling
floor
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
Application number
EP79901211A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0020433A1 (fr
Inventor
Gilbert Riollet
Raymond Bessay
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 SA
Original Assignee
Alsthom Atlantique 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 Alsthom Atlantique SA filed Critical Alsthom Atlantique SA
Publication of EP0020433A1 publication Critical patent/EP0020433A1/fr
Application granted granted Critical
Publication of EP0020433B1 publication Critical patent/EP0020433B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
    • F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
    • 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 a grid of blades for a turbine comprising, on the one hand, a series of blades arranged between a ceiling and a floor, thus defining a series of channels traversed by the fluid supplying the turbine, each channel being limited by the upper surface of a dawn and the lower surface of the neighboring dawn, the floor and the ceiling, and, on the other hand, at least one communication pierced in the ceiling and / or at least one communication pierced in the floor, each communication opening at one end into a channel and at the other end at a point located downstream of said grid.
  • the slippage generates a whirlwind of trigonometric direction at the ceiling of the channel and in the opposite direction to the floor for an observer placed downstream of the grid of blades.
  • German Patent No. 893649 that the communications opening into the channel have a mouth located in the middle part of the ceiling at equal distance between the upper surface of the dawn and the lower surface of the neighboring dawn limiting the channel.
  • This communication is of fairly large diameter (relative to the dimensions of the channel) to allow suction of the boundary layer.
  • the blade grid according to the invention is characterized in that for each communication the end opening into the channel is located in the vicinity of the lower surface of the blade limiting said channel at the level of the neck at a point distant from the part median of this channel.
  • This point being connected by communication to a point located downstream of the grid (therefore at reduced pressure) the pressure at this point decreases, which reduces the skid of the boundary layer, thus making it useful for working in the channel considered.
  • the blade grid does not have a ceiling (in the case of certain movable blades) or floor (in the case of certain fixed blades), communications are then provided only in the floor (in the case of said movable blades) or in the ceiling (case of said fixed blades).
  • the invention also relates to a turbine comprising a fixed blade grid followed by a movable blade grid, each of the blade grids comprising a series of blades arranged between a ceiling and a floor thus defining a series of channels traversed by the fluid supplying the turbine, each channel being limited by the upper surface of a blade and the lower surface of the neighboring blade, the floor and the ceiling, the fixed blade grid comprising for each blade at least one pierced communication in the ceiling and opening at one end into a channel and at the other end at a point located downstream of said grid, said turbine comprising at the level of the movable blade grid sealing wipers surrounding the ceiling of said grid , characterized in that for each communication the end opening into the channel is located in the vicinity of the lower surface of the blade limiting said channel at the level of the neck at a point distant from the middle part of this channel, and therefore at the point can al which is at maximum pressure.
  • FIG. 1 there are shown two blades A and B which are part of a crown and whose foot is fixed on a floor 1 and the head on a ceiling 2.
  • the floor and the ceiling are usually cylindrical or frustoconical surfaces.
  • the intrados of dawn B, the extrados of dawn A and the floor and the ceiling define a channel 3.
  • the flow is done by following healthy nets such as (c ).
  • the fluid streams are orthogonal to the isobars and in the directions shown (1) (m) then begin to swirl as soon as they hit the upper surface of the dawn (A) .
  • FIG. 2 there is shown in axial section a turbine provided with grids of fixed and movable blades according to the invention.
  • each movable blade grid 4 is located between two grids of fixed blades 5 and 5 '.
  • the direction of fluid flow is indicated by arrow F.
  • the movable vane grids 4 are integral with the rotor 6 while the fixed vane grids 5 and 5 ′ are integral with the stator 7.
  • the fixed vane grids 5 are provided with sealing wipers 8 which reduce the leaks between rotor 6 and fixed vane grids 5.
  • the stator 7 is provided sealing wipers 9 which reduce leaks between the stator 7 and the ceiling 12 of the movable blade grid 4.
  • the movable blade grid 4 comprises for each blade a communication 13 hollowed out in the floor 11 between a point located in the vicinity of the lower surface of the blade and at the level of the neck 10 of the channel limited by said lower surface and a point located in downstream of the movable blade grid 4 (see Figures 2 and 3).
  • the movable blade grid 4 also includes, for each blade, a communication 14 hollowed out in the ceiling 12 between a point located in the vicinity of the lower surface of the blade and at the level of the neck of the channel bounded by said lower surface and which terminates downstream of the movable vane grid 4 (see Figure 2).
  • the neck or constriction of the canal is the region of the canal where the distance between upper and lower surfaces is minimal.
  • the fixed blade grid (5 or 5 ′) comprises for each blade a communication 23 hollowed out in the floor 21 which starts from a point located in the vicinity of the lower surface of the blade at the neck of the channel limited by said lower surface and which ends downstream of the fixed vane grid 5 (see FIG. 2).
  • the fixed blade grid 5 or 5 ′ also includes, for each blade, a communication 24, hollowed out in the ceiling 22, between a point located in the vicinity of the lower surface of the blade at the level of the neck 20 of the channel limited by said lower surface and a point located downstream of the fixed vane grid 5 (see FIGS. 2 and 4).
  • the leakage of fluid through the communications 24 serves to supply the leakage of fluid between the wipers 9 and the ceiling 12 of the next movable vane grid 4 and preferably the flow rate of the communications 24 is chosen to be less than or equal to the leakage flow rate between the wipers 9 and the ceiling 12.
  • the fluid leakage through the communications 13 is used to supply the fluid leakage between the wipers of the next fixed vane grid and the rotor and preferably the flow rate of the communications 13 is chosen to be less than or equal to the leakage flow rate between wipers and rotor.
  • the communications between a point of the floor and / or of the ceiling located in the vicinity of the lower surface of the blades at the level of the neck of the channel limited by the lower surface and a point located in a low pressure chamber constituted by the part situated downstream of the blades allow to lower the overpressure in the vicinity of the lower surface of the blades at the floor and / or ceiling.
  • the turbine according to the invention could include such communications only on the grids of fixed blades or on the grids of movable blades hollowed out in the floor and / or the ceiling of these grids.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP79901211A 1978-10-05 1980-04-22 Grille d'aubes pour turbine et turbine comportant une telle grille d'aubes Expired EP0020433B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7828459 1978-10-05
FR7828459A FR2438155A1 (fr) 1978-10-05 1978-10-05 Grille d'aubes pour turbine ou compresseur et turbine ou compresseur comportant une telle grille d'aubes

Publications (2)

Publication Number Publication Date
EP0020433A1 EP0020433A1 (fr) 1981-01-07
EP0020433B1 true EP0020433B1 (fr) 1983-08-03

Family

ID=9213364

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79901211A Expired EP0020433B1 (fr) 1978-10-05 1980-04-22 Grille d'aubes pour turbine et turbine comportant une telle grille d'aubes

Country Status (7)

Country Link
US (1) US4335995A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
EP (1) EP0020433B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS55500786A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE886657A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2966029D1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2438155A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
WO (1) WO1980000728A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19524984A1 (de) * 1995-07-08 1997-01-09 Abb Management Ag Leitschaufelreihe für eine Turbine

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4863348A (en) * 1987-02-06 1989-09-05 Weinhold Wolfgang P Blade, especially a rotor blade
GB2207465B (en) * 1987-07-18 1992-02-19 Rolls Royce Plc A compressor and air bleed arrangement
US5020970A (en) * 1989-07-13 1991-06-04 Dresser-Rand Company Fluid-handling, bladed rotor
FR2661944B1 (fr) * 1990-05-14 1994-06-10 Alsthom Gec Etage de turbomachine avec pertes secondaires reduites.
FR2666846B1 (fr) * 1990-09-13 1992-10-16 Alsthom Gec Grille d'aubes pour turbomachine munie de fentes d'aspiration dans le plafond et/ou dans le plancher et turbomachine comportant ces grilles.
CA2321640C (en) 1998-02-26 2004-01-06 Allison Advanced Development Company Compressor endwall bleed system
US6773227B2 (en) * 2003-01-10 2004-08-10 General Electric Company Wheel space pressure relief device
RU2279551C1 (ru) * 2005-01-11 2006-07-10 Открытое акционерное общество "Научно-производственное объединение по исследованию и проектированию энергетического оборудования им. И.И. Ползунова" (ОАО "НПО ЦКТИ") Высокотемпературная многоступенчатая паровая турбина
FR2916815B1 (fr) * 2007-05-30 2017-02-24 Snecma Compresseur a reinjection d'air
EP2055901A1 (en) * 2007-10-31 2009-05-06 Siemens Aktiengesellschaft Guide bucket for a turbine of a thermal power plant having a foot section
US9032738B2 (en) 2012-04-25 2015-05-19 Siemens Aktiengeselischaft Gas turbine compressor with bleed path
US9194259B2 (en) * 2012-05-31 2015-11-24 General Electric Company Apparatus for minimizing solid particle erosion in steam turbines
JP5591986B2 (ja) * 2013-07-22 2014-09-17 三菱重工業株式会社 端壁部材及びガスタービン
CZ309804B6 (cs) * 2022-08-25 2023-10-25 DOOSAN ŠKODA POWER s.r.o. Turbínová sestava axiální turbíny

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR341014A (fr) * 1903-10-15 1904-07-27 Georges Westinghouse Perfectionnements dans les turbines à fluide sous pression
DE893649C (de) * 1940-05-04 1953-10-19 Siemens Ag Einrichtung an Dampf- oder Gasturbinenbeschaufelungen
US2291828A (en) * 1940-05-04 1942-08-04 Westinghouse Electric & Mfg Co Turbine blading
DE1106027B (de) * 1955-07-18 1961-05-04 Power Jets Res & Dev Ltd Axialverdichter, dessen Lauf- und/oder Leitschaufeln mit einem Deckband versehen sind
JPS5159106A (ja) * 1974-11-16 1976-05-24 Mitsubishi Heavy Ind Ltd Taabokikai
JPS5254807A (en) * 1975-10-31 1977-05-04 Hitachi Ltd Axial-flow fluid machine
JPS5254809A (en) * 1975-10-31 1977-05-04 Hitachi Ltd Axial-flow fluid machine construction

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19524984A1 (de) * 1995-07-08 1997-01-09 Abb Management Ag Leitschaufelreihe für eine Turbine

Also Published As

Publication number Publication date
FR2438155A1 (fr) 1980-04-30
DE2966029D1 (en) 1983-09-08
US4335995A (en) 1982-06-22
JPS55500786A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1980-10-16
EP0020433A1 (fr) 1981-01-07
BE886657A (fr) 1981-06-15
WO1980000728A1 (fr) 1980-04-17
FR2438155B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1981-08-14

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