EP0780545B1 - Agencement d'extrémités internes d'un étage d'aubes à calage variable - Google Patents
Agencement d'extrémités internes d'un étage d'aubes à calage variable Download PDFInfo
- Publication number
- EP0780545B1 EP0780545B1 EP19960402808 EP96402808A EP0780545B1 EP 0780545 B1 EP0780545 B1 EP 0780545B1 EP 19960402808 EP19960402808 EP 19960402808 EP 96402808 A EP96402808 A EP 96402808A EP 0780545 B1 EP0780545 B1 EP 0780545B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- vanes
- pivot
- ring
- pivot pins
- grooves
- 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
Links
Images
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
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
- F01D17/12—Final actuators arranged in stator parts
- F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
- F01D17/16—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes
- F01D17/162—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes for axial flow, i.e. the vanes turning around axes which are essentially perpendicular to the rotor centre line
Definitions
- the invention relates to an arrangement internal ends of a stage of wedging vanes variable.
- vanes linked to a stator but whose inclination can be changed at will to more or less divert or straighten the gas flow going through them to get the best performance characteristics at different diets the machine in which they are located.
- the the outer ends of these blades are then supported by a bearing formed in the wall of the stator, and the internal ends, close to the rotor, are retained in a common link ring.
- a known arrangement described in particular in French patent 2,556,410 consists to provide the inner ends of the pivot blades which rotate in sockets integral with the ring; these sockets can in particular have a surface external threaded, which allows them to be screwed into ring recesses. The ring is then supported, but sliding of the pivots in the bushings and relative to the ring remain possible so that the ring can play in the gas stream and harm thus to the proper functioning of the machine.
- blade pivots in fact, pivots of the outer end
- brake parts i.e. stop parts for the pivoting movement of the pivots in the landings.
- the invention is therefore characterized, by compared to this prior art, by the combination of a threaded sleeve engaged in the connecting ring and acting as pivot bearing and brake parts engaged in both notches of the pivots and bushings to hold them in rotation.
- the pivot notches are circular, the socket notches are straight and tangent to the pivot notches and the pieces of brake are bars slipped into the notches of sockets.
- FIG. 1 We have therefore represented a circular stage vanes 1 with variable setting in FIG. 1; he is located between two stages of movable blades 2, linked to a rotor 3, while the blades 1 with variable setting are linked to a stator wall 4 at their ends external 5, where they end with an external pivot 6 crossing a landing 7 cleaning through the wall of the stator 4, and, beyond this wall, by a head 8 to square or other section which is gripped by a lever, not shown, articulated to a control ring surrounding the turbomachine.
- the control ring When the control ring is rotated, it switches the levers of controls and therefore rotates the external pivots 6 and the vanes 1.
- Opposite ends or ends internals 9 of the vanes 1 are linked together by a connecting ring 10 associated with rotor 3 by a gasket labyrinth 11 which establishes the sealing preventing moving gas in the vein to bypass the vanes variable setting 1; the connecting ring 10 carries threaded recesses 12 in which sockets threaded 13 are engaged by screwing; he comes in extension of annular platforms 23 of the blades mobile 2 to delimit the gas flow stream as continuously and smoothly as possible. If we begins to refer to Figure 2, we see that the sockets 13 include a central hole 14 in which a pivot 15, ending a respective blade 1 of this side, is engaged by being able to both slide there and turn there.
- a washer 19 serving as a thrust bearing is retained between a flat platform 20 of the blade 1, from which the internal pivot 15 stands, and a platform 21 also flat and perpendicular to the internal pivot 15 of the connecting ring 10.
- the correct insertion position of the pivot internal 15 in the connecting ring 10 is thus established by turning a polygonal head 22 established at bottom of the socket 13, which modifies the screwing of the socket 13 and therefore the height of the internal pivot 15.
- the labyrinth seal 11 is then crimped into a rail circular 24 in the connecting ring 10; rail 24 wears a tab 25 which touches a section of the polygonal head 22 and then prohibits the socket 13 from move while the machine is running.
- the thickness of the washer 19 is chosen according to of the desired setting.
- the bar 16 can be full or hollowed out in the center, and metallic or composite material based of carbon ; it is these latter possibilities that are preferred because they reduce efforts at assembly.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Control Of Turbines (AREA)
Description
- la figure 1 est une vue générale de l'étage d'aubes,
- la figure 2 représente l'agencement conforme à l'invention,
- et la figure 3 est une coupe suivant la ligne III-III sur la figure 2.
Claims (6)
- Agencement d'extrémités internes d'un étage d'aubes à calage variable (1), comprenant un anneau de liaison (10) commun aux aubes, des douilles filetées (13) respectivement associées aux aubes (1), vissées dans des évidements (12) de l'anneau et dans lesquelles des pivots (15) d'extrémité des aubes pénètrent en coulissant, caractérisé en ce que les douilles (13) et les pivots (15) sont pourvus d'encoches (17, 18) en regard dans lesquelles sont introduites des pièces de frein (16) perpendiculaires aux pivots.
- Agencement d'extrémités internes d'un étage d'aubes à calage variable selon la revendication 1, caractérisé en ce que les encoches (18) de pivots sont circulaires, les encoches (17) de douilles sont rectilignes et tangentes aux encoches de pivot et les pièces de frein sont des barrettes glissées dans les encoches de douilles.
- Agencement d'extrémités internes d'un étage d'aubes à calage variable selon l'une quelconque des revendications 1 ou 2, caractérisé en ce qu'il comprend des rondelles de butée (19) engagées autour des pivots (15) et retenues entre des surfaces planes (20, 21), parallèles entre elles et perpendiculaires aux pivots, de l'anneau et des aubes.
- Agencement d'extrémités internes d'un étage d'aubes à calage variable selon l'une quelconque des revendications 1 à 3, caractérisé en ce que les douilles (13) finissent par une tête polygonale de réglage (22).
- Agencement d'extrémités internes d'un étage d'aubes à calage variable selon la revendication 4, caractérisé en ce que des languettes (25) d'un rail circulaire (24) serti dans l'anneau de liaison (10) touchent les têtes polygonales (22).
- Agencement d'extrémités internes d'un étage d'aubes à calage variable selon l'une quelconque des revendications 1 à 5, caractérisé en ce que les pièces de frein sont évidées et en matière composite à base de carbone.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9515122A FR2742800B1 (fr) | 1995-12-20 | 1995-12-20 | Agencement d'extremites internes d'un etage d'aubes a calage variable |
FR9515122 | 1995-12-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0780545A1 EP0780545A1 (fr) | 1997-06-25 |
EP0780545B1 true EP0780545B1 (fr) | 1999-05-06 |
Family
ID=9485707
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19960402808 Expired - Lifetime EP0780545B1 (fr) | 1995-12-20 | 1996-12-19 | Agencement d'extrémités internes d'un étage d'aubes à calage variable |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0780545B1 (fr) |
DE (1) | DE69602342T2 (fr) |
FR (1) | FR2742800B1 (fr) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5921749A (en) * | 1996-10-22 | 1999-07-13 | Siemens Westinghouse Power Corporation | Vane segment support and alignment device |
US6413043B1 (en) * | 2000-11-09 | 2002-07-02 | General Electric Company | Inlet guide vane and shroud support contact |
US6887035B2 (en) * | 2002-10-23 | 2005-05-03 | General Electric Company | Tribologically improved design for variable stator vanes |
US7125222B2 (en) * | 2004-04-14 | 2006-10-24 | General Electric Company | Gas turbine engine variable vane assembly |
FR2874977A1 (fr) * | 2004-09-07 | 2006-03-10 | Snecma Moteurs Sa | Douille de support pivotant pour pivot d'aube a calage variable de turbomachine |
FR2920492B1 (fr) * | 2007-08-30 | 2009-10-30 | Snecma Sa | Etage d'aubes a calage variable pour une turbomachine |
IT1393757B1 (it) | 2008-07-28 | 2012-05-08 | Ansaldo Energia Spa | Gruppo di collegamento per collegare una paletta ad un anello di supporto, in particolare ad un anello interno di uno statore di compressore |
FR2966530B1 (fr) * | 2010-10-21 | 2012-11-02 | Snecma | Etage redresseur a calage variable pour un compresseur d'une turbomachine |
DE102013211629A1 (de) * | 2013-06-20 | 2015-01-08 | MTU Aero Engines AG | Leitschaufelanordnung und Verfahren zum Montieren einer Leitschaufel |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2556410B1 (fr) * | 1983-12-07 | 1986-09-12 | Snecma | Dispositif de centrage de l'anneau interieur d'un stator a ailettes a calage variable |
US4585390A (en) * | 1984-06-04 | 1986-04-29 | General Electric Company | Vane retaining means |
US4792277A (en) * | 1987-07-08 | 1988-12-20 | United Technologies Corporation | Split shroud compressor |
FR2644525B1 (fr) * | 1989-03-15 | 1991-05-24 | Snecma | Systeme de retention d'aubes de stator a calage variable |
-
1995
- 1995-12-20 FR FR9515122A patent/FR2742800B1/fr not_active Expired - Fee Related
-
1996
- 1996-12-19 EP EP19960402808 patent/EP0780545B1/fr not_active Expired - Lifetime
- 1996-12-19 DE DE1996602342 patent/DE69602342T2/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE69602342D1 (de) | 1999-06-10 |
FR2742800A1 (fr) | 1997-06-27 |
EP0780545A1 (fr) | 1997-06-25 |
DE69602342T2 (de) | 1999-11-04 |
FR2742800B1 (fr) | 1998-01-16 |
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