EP0093631B1 - Safety abutment for the pivots of variable position stator vanes - Google Patents

Safety abutment for the pivots of variable position stator vanes Download PDF

Info

Publication number
EP0093631B1
EP0093631B1 EP83400695A EP83400695A EP0093631B1 EP 0093631 B1 EP0093631 B1 EP 0093631B1 EP 83400695 A EP83400695 A EP 83400695A EP 83400695 A EP83400695 A EP 83400695A EP 0093631 B1 EP0093631 B1 EP 0093631B1
Authority
EP
European Patent Office
Prior art keywords
pivot
arm
inner ring
attachment means
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
Application number
EP83400695A
Other languages
German (de)
French (fr)
Other versions
EP0093631A1 (en
Inventor
Daniel Jean Marey
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.)
Safran Aircraft Engines SAS
Original Assignee
Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA
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 Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA filed Critical Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA
Publication of EP0093631A1 publication Critical patent/EP0093631A1/en
Application granted granted Critical
Publication of EP0093631B1 publication Critical patent/EP0093631B1/en
Expired legal-status Critical Current

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 a safety stop device in a stator formed of variable-pitch blades, each blade comprising a head pivot and a foot pivot, the head pivot cooperating with a bearing fixed in the motor casing, being driven by a device for adjusting the orientation of the blades, the foot pivot being movable in a bearing fixed in an inner ring of the motor, the safety stop device comprising stop elements provided in the inner ring to limit the deflections of the blade in the event of a rupture of one of the elements of the device for adjusting the orientation of the blades.
  • stator vanes with variable setting is given in French patent N ° 2205952 in which the preliminary compression stage and four upper compression stages are fitted with adjustable stator fins.
  • the pivots at the head of these fins are controlled by a ring and lever system which, from a single order, changes the orientation of the fins of each stage concerned.
  • the stator of the preliminary compression stage comprises fins of relatively large dimensions, which are further provided with a pivot at the foot allowing the bending forces to be taken up.
  • the invention aims to minimize the drawbacks resulting from a break in control and is suitable in particular for stator blades with variable setting controlled at the head and comprising a foot pivot.
  • a device of this kind is already known from US-A patent No. 3029067 which provides a stop consisting of a pin and cooperating with part of the blade to prevent unwanted rotation beyond a certain angular value.
  • the proposed device is not entirely satisfactory, in particular for the simplicity of construction and the shear strength at high torques.
  • the device according to the invention is remarkable in that it consists of an arm comprising means for fixing to the foot pivot and of abutment elements constituted by the side walls of a circumferential groove formed in the internal surface of the inner ring and against which the arm rests.
  • Fig. 1 shows in partial section part of a compressor stage comprising a stator 1 formed of a crown of vanes 2 with pivots at the top 3 and at the bottom 4 whose orientation is controlled at the top by a control system 5 located at outside the crankcase 6, and a rotor 7 formed of vanes 8, the feet of which are embedded in the rotor disc 9.
  • the head pivot 3 pivots in a bearing fixed in the upper ring or casing 6.
  • a connecting rod or control lever 10 is fixed by one of its ends to the pivot 3 and, by its other end, to a control device 11 of the crown of blades.
  • the foot pivot 4 is held in a bearing 12 fixed in the inner ring 13.
  • the stop device according to the invention (fig. 2,3, 5) consists of an arm 14 in the hands comprising means for fixing to the pivot 4 and stop elements 15, 16 fixed to the inner ring 13 and against which the arm 14 is supported, in the event of a break in the control mechanism 10-11 for example.
  • the cylindrical pivot 4 of the blade root carries at its end at least one flat 17, and preferably two parallel flat.
  • the pivot 4 cooperates with a bearing 12 consisting of a bush made of a self-lubricating material fixed in the lower ring 13 of the stage.
  • This ring is provided on its internal surface 18 with a circumferential groove 19 in which the end of the pivot 4 projects and, in particular, the part carrying the flats 17.
  • An arm 14 is fixed on the end of the pivot by fixing means formed by a central hole 20 of rectangular shape with two opposite curved sides corresponding to the shape of the end of the pivot.
  • the arm 14 has, in plan view (fig. 4) a diamond shape in which the two vertices 22, 23 located on the small diagonal, are rounded. The length of this diagonal is less than the width of the groove 19.
  • angles of the rhombus are determined so as to allow the orientation of the blades to be adjusted at a given angle.
  • the end of the opposite sides of the rhombus is placed against the abutment elements formed by the sides 15, 16 of the groove 19.
  • annular profile 21 for example in the form of a C, is fixed by any means known per se to the lower ring 13.
  • the foot pivot 4 carries in its axis a hexagonal blind hole 24, into which penetrates a stud 25 of comparable shape and dimensions, perpendicular to the plane of the arm 14 and integral with the latter.
  • An annular C 21 profile fixed on the inner ring ensures the sealing and possibly maintains the arm in cooperation with the pivot.
  • the fact of limiting the amplitude of the possible accidental movement of the blade makes it possible to limit the total length of the motor: in fact, the blades can no longer be placed in a flag, rope parallel to the wind bed, we can reduce the length of the motor by 5 mm per stage, resulting in a significant reduction in mass.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Control Of Turbines (AREA)
  • Sliding-Contact Bearings (AREA)

Description

L'invention concerne un dispositif de butée de sécurité dans un stator formé d'aubes à calage variable, chaque aube comportant un pivot en tête et un pivot en pied, le pivot de tête coopérant avec un palier fixé dans le carter du moteur, étant entraîné par un dispositif de réglage de l'orientation des aubes, le pivot de pied étant mobile dans un palier fixé dans un anneau intérieur du moteur, le dispositif de butée de sécurité comprenant des éléments de butée prévus dans l'anneau intérieur pour limiter les débattements de l'aube en cas de rupture de l'un des éléments du dispositif de réglage de l'orientation des aubes.The invention relates to a safety stop device in a stator formed of variable-pitch blades, each blade comprising a head pivot and a foot pivot, the head pivot cooperating with a bearing fixed in the motor casing, being driven by a device for adjusting the orientation of the blades, the foot pivot being movable in a bearing fixed in an inner ring of the motor, the safety stop device comprising stop elements provided in the inner ring to limit the deflections of the blade in the event of a rupture of one of the elements of the device for adjusting the orientation of the blades.

L'adaptation de l'orientation des ailettes de stator des différents étage de compresseur est particulièrement souhaitable lorsque l'on désire, pour les différents étages, à un régime donné, parexem- pie là plus grande pression possible tout en conservant une marge au pompage suffisante. En conséquence, les ailettes d'un ou de plusieurs étages de compression portent au moins un pivot, monté dans un palier, susceptible d'être entraîné par un dispositif de commande. Si un élément de liaison mécanique, par exemple un axe reliant deux leviers successifs du mécanisme de commande ou un axe reliant l'un de ces leviers à un élément fixe tel que le carter, ne remplit plus son office d'élément de liaison, pour une cause quelconque telle que rupture ou perte après desserrage d'un écrou de maintien, il peut se produire

  • - une mise en drapeau brutale des aubes, ce qui entraîne un pompage probable de l'étage tout entier;
  • - un flottement entretenu des aubes, ce qui entraîne la rupture quasi certaine de l'une d'entre elles et la destruction des étages du rotor suivant, voire des destructions secondaires encore plus graves.
The adaptation of the orientation of the stator fins of the different compressor stages is particularly desirable when it is desired, for the different stages, at a given speed, for example the greatest possible pressure while retaining a pumping margin. sufficient. Consequently, the fins of one or more compression stages carry at least one pivot, mounted in a bearing, capable of being driven by a control device. If a mechanical connecting element, for example an axis connecting two successive levers of the control mechanism or an axis connecting one of these levers to a fixed element such as the casing, no longer fulfills its function as a connecting element, for any cause such as breakage or loss after loosening a retaining nut, it may occur
  • - a brutal feathering of the blades, which leads to a probable pumping of the whole stage;
  • - A maintained floating of the blades, which causes the almost certain rupture of one of them and the destruction of the stages of the next rotor, even even more serious secondary destruction.

Un exemple d'aubes de stator à calage variable est donnédans le brevet français N° 2205952 dans lequel l'étage de compression préliminaire et quatre étages supérieurs de compression sont équipés d'ailettes de stator réglables. Les pivots disposés en tête de ces ailettes sont commandés par un système à anneaux et leviers qui, à partir d'une commande unique, modifie l'orientation des ailettes de chaque étage concerné. Le stator de t'étage de compression préliminaire comporte des ailettes de relativement grandes dimensions, qui sont munies en outre d'un pivot en pied permettant de reprendre les efforts de flexion.An example of stator vanes with variable setting is given in French patent N ° 2205952 in which the preliminary compression stage and four upper compression stages are fitted with adjustable stator fins. The pivots at the head of these fins are controlled by a ring and lever system which, from a single order, changes the orientation of the fins of each stage concerned. The stator of the preliminary compression stage comprises fins of relatively large dimensions, which are further provided with a pivot at the foot allowing the bending forces to be taken up.

L'invention vise à minimiser les inconvénients résultant d'une rupture de commande et est adaptée en particulier à des aubes de stator à calage variable commandées en tête et comportant un pivot de pied. Un dispositif de ce genre est déjà connu par le brevet US-A N° 3029067 qui prévoit une butée constituée d'un pion et coopérant avec une partie de l'aube pour empêcher une rotation indésirable au-delà d'une certaine valeur angulaire. Toutefois, le dispositif proposé ne donne pas entière satisfaction, notamment pour la simplicité de réalisation et la résistance en cisaillement aux couples élevés.The invention aims to minimize the drawbacks resulting from a break in control and is suitable in particular for stator blades with variable setting controlled at the head and comprising a foot pivot. A device of this kind is already known from US-A patent No. 3029067 which provides a stop consisting of a pin and cooperating with part of the blade to prevent unwanted rotation beyond a certain angular value. However, the proposed device is not entirely satisfactory, in particular for the simplicity of construction and the shear strength at high torques.

Le dispositif selon l'invention est remarquable en ce qu'il est constitué d'un bras comportant des moyens de fixation au pivot de pied et d'éléments de butée constitués par les parois latérales d'une rainure circonférentielle ménagée dans la surface interne de l'anneau intérieur et contre lesquelles vient s'appuyer le bras.The device according to the invention is remarkable in that it consists of an arm comprising means for fixing to the foot pivot and of abutment elements constituted by the side walls of a circumferential groove formed in the internal surface of the inner ring and against which the arm rests.

Les explications et figures données ci-après à titre d'exemple, permettront de comprendre comment l'invention peut être réalisée.

  • La fig. 1 représente la disposition d'une aube à deux pivots commandée en tête.
  • La fig. 2 est une vue en perspective éclatée et en coupe partielle d'un pivot comportant un dispositif de butée selon l'invention.
  • La fig. 3 est une vue en coupe longitudinale d'un pivot équipé d'un dispositif selon une première forme de réalisation de l'invention.
  • La fig. 4 est une vue selon IV de la fig. 3, sans la pièce 21.
  • La fig. 5 est une vue en coupe longitudinale d'un pivot équipé d'un dispositif selon une deuxième forme de réalisation.
The explanations and figures given below by way of example will make it possible to understand how the invention can be implemented.
  • Fig. 1 shows the arrangement of a blade with two pivots controlled at the head.
  • Fig. 2 is an exploded perspective view in partial section of a pivot comprising a stop device according to the invention.
  • Fig. 3 is a view in longitudinal section of a pivot fitted with a device according to a first embodiment of the invention.
  • Fig. 4 is a view along IV of FIG. 3, without part 21.
  • Fig. 5 is a view in longitudinal section of a pivot fitted with a device according to a second embodiment.

La fig. 1 montre en coupe partielle une partie d'un étage compresseur comportant un stator 1 formé d'une couronne d'aubes 2 à pivots en tête 3 et en pied 4 dont l'orientation est commandée en tête par un système de commande 5 situé à l'extérieur du carter moteur 6, et un rotor 7 formé d'aubes 8 dont les pieds sont encastrés dans le disque de rotor 9.Fig. 1 shows in partial section part of a compressor stage comprising a stator 1 formed of a crown of vanes 2 with pivots at the top 3 and at the bottom 4 whose orientation is controlled at the top by a control system 5 located at outside the crankcase 6, and a rotor 7 formed of vanes 8, the feet of which are embedded in the rotor disc 9.

Le pivot de tête 3 tourillonne dans un palier fixé dans l'anneau supérieur ou carter 6. Une bielle ou levier de commande 10 est fixé par une de ses extrémités au pivot 3 et, par son autre extrémité, à un dispositif de commande 11 de la couronne d'aubes.The head pivot 3 pivots in a bearing fixed in the upper ring or casing 6. A connecting rod or control lever 10 is fixed by one of its ends to the pivot 3 and, by its other end, to a control device 11 of the crown of blades.

Le pivot de pied 4 est maintenu dans un palier 12 fixé dans l'anneau intérieur 13.The foot pivot 4 is held in a bearing 12 fixed in the inner ring 13.

Le dispositif de butée selon l'invention (fig. 2,3, 5) est constitué d'au mains un bras 14 comportant des moyens de fixation au pivot 4 et d'éléments de butée 15, 16 fixés à l'anneau intérieur 13 et contre lesquels vient s'appuyer le bras 14, en cas de rupture du mécanisme de commande 10-11 par exemple.The stop device according to the invention (fig. 2,3, 5) consists of an arm 14 in the hands comprising means for fixing to the pivot 4 and stop elements 15, 16 fixed to the inner ring 13 and against which the arm 14 is supported, in the event of a break in the control mechanism 10-11 for example.

Selon la forme de réalisation représentée fig. 2, 3, 4, le pivot cylindrique 4 du pied de l'aube porte àson extrémité au moins un méplat 17, et de préférence deux méplats parallèles.According to the embodiment shown in fig. 2, 3, 4, the cylindrical pivot 4 of the blade root carries at its end at least one flat 17, and preferably two parallel flat.

Le pivot 4 coopère avec un palier 12 constitué d'une douille en un matériau autolubrifiant fixé dans l'anneau inférieur 13 de l'étage. Cet anneau est pourvu à sa surface interne 18 d'une rainure circonférentielle 19 dans laquelle fait saillie l'extrémité du pivot 4 et, en particulier, la partie portant les méplats 17. Un bras 14 vient se fixer sur l'extrémité du pivot par des moyens de fixation formés d'un trou central 20 de forme rectangulaire avec deux côtés opposés courbes correspondant à la forme de l'extrémité du pivot. Le bras 14 présente, vue en plan (fig. 4) une forme en losange dans lequel les deux sommets 22, 23 situés sur la petite diagonale, sont arrondis. La longueur de cette diagonale est inférieure à la largeur de la rainure 19. Les angles du losange sont déterminés de manière à permettre le réglage de l'orientation des aubes dans un angle donné. En cas de rupture de l'élément de commande, l'extrémité des côtés opposés du losange vient se placer contre les éléments de butée constitués par les côtés 15, 16 de la rainure 19.The pivot 4 cooperates with a bearing 12 consisting of a bush made of a self-lubricating material fixed in the lower ring 13 of the stage. This ring is provided on its internal surface 18 with a circumferential groove 19 in which the end of the pivot 4 projects and, in particular, the part carrying the flats 17. An arm 14 is fixed on the end of the pivot by fixing means formed by a central hole 20 of rectangular shape with two opposite curved sides corresponding to the shape of the end of the pivot. The arm 14 has, in plan view (fig. 4) a diamond shape in which the two vertices 22, 23 located on the small diagonal, are rounded. The length of this diagonal is less than the width of the groove 19. The angles of the rhombus are determined so as to allow the orientation of the blades to be adjusted at a given angle. In the event of the control element breaking, the end of the opposite sides of the rhombus is placed against the abutment elements formed by the sides 15, 16 of the groove 19.

Afin d'assurer l'étanchéité de la rainure 19 et/ou le maintien du bras, un profilé annulaire 21 par exemple en forme de C est fixé par tout moyen connu en soi sur l'anneau inférieur 13.In order to seal the groove 19 and / or maintain the arm, an annular profile 21, for example in the form of a C, is fixed by any means known per se to the lower ring 13.

Selon une deuxième forme de réalisation présentée sur la fig. 5, le pivot de pied 4 porte dans son axe un trou borgne hexagonal 24, dans lequel pénètre un téton 25 de forme et de dimensions comparables, perpendiculaire au plan du bras 14 et solidaire de celui-ci. Un profilé annulaire en C 21 fixé sur l'anneau intérieur assure l'étanchéité et maintien éventuellement le bras en coopération avec le pivot.According to a second embodiment presented in FIG. 5, the foot pivot 4 carries in its axis a hexagonal blind hole 24, into which penetrates a stud 25 of comparable shape and dimensions, perpendicular to the plane of the arm 14 and integral with the latter. An annular C 21 profile fixed on the inner ring ensures the sealing and possibly maintains the arm in cooperation with the pivot.

Selon d'autres formes de réalisation équivalentes non représentées

  • - ou le bras a la forme d'un triangle isocèle, correspondant à une partie tronquée du losange et comportant au milieu de sa base les moyens de fixation à l'extrémité du pivot,
  • - ou le bras a une forme rectangulaire, les moyens de fixation étant prévus au centre ou à une extrémité du rectangle,
  • - ou les éléments de butée 15,16 sont constitués pour un ou plusieurs bras par les parois d'un logement dans lequel débouche l'extrémité du pivot,
According to other equivalent embodiments not shown
  • - or the arm has the shape of an isosceles triangle, corresponding to a truncated part of the rhombus and comprising in the middle of its base the means of attachment to the end of the pivot,
  • - or the arm has a rectangular shape, the fixing means being provided in the center or at one end of the rectangle,
  • - or the abutment elements 15, 16 are formed for one or more arms by the walls of a housing into which the end of the pivot opens,

En cas de rupture de la commande, l'aube pivote brusquement sous l'action des forces aérodynamiques jusqu'à ce que la ou les extrémités du bras 14 viennent en butée contre les parois du logement ou gorge 19 de l'anneau.In the event of a break in the control, the blade suddenly pivots under the action of aerodynamic forces until the end or ends of the arm 14 abut against the walls of the housing or groove 19 of the ring.

Outre les avantages consistant en la suppression du pompage de l'étage et des ruptures d'aube, le fait de limiter l'amplitude du débattement accidentel possible de l'aube, permet de limiter la longueur totale du moteur: en effet, les aubes ne pouvant plus se placer en drapeau, corde parallèle au lit du vent, on peut réduire la longueur du moteur de 5 mm par étage, d'où une réduction de masse importante.In addition to the advantages of eliminating pumping of the stage and breakage of the blade, the fact of limiting the amplitude of the possible accidental movement of the blade, makes it possible to limit the total length of the motor: in fact, the blades can no longer be placed in a flag, rope parallel to the wind bed, we can reduce the length of the motor by 5 mm per stage, resulting in a significant reduction in mass.

Claims (6)

1. Safety abutment device in a stator compounded with variable pitch vanes, each vane comprising a tip pivot and a root pivot, the tip pivot cooperating with a bearing mounted in the engine housing, being actuated by a setting device of the incidence of the vanes, the root pivot being movable in a bearing mounted in the inner ring of the engine, the safety abutment device compounded with abutment members provided in the inner ring to limit the clearance of the vane in the event of the breaking of one of the members of the setting device of the incidence of the vanes, characterised in that the abutments members (15, 16) are formed by the side walls of a circonferential notch (19) managed in the inner surface (18) of the inner ring (13) and co-operate with an arm (14) comprising attachment means (20, 25) to the root pivot (4).
2. Device according to Claim 1, characterised in that the arm (14) has a diamond shape the centre of which supports the attachment means (20,25).
3. Device according to Claim 1, characterised in that the arm (14) has the shape of an isosceles triangle the middle of the base of which supports the attachment means (20, 25).
4. Device according to Claim 2 or 3, characterised in that the means for connecting the arm (14) are constituted by a rectangular hole (20) the two opposite sides of which are curved, said hole co-operating with the end of the cylindrical root pivot (4) which has two parallel flats (17).
5. Device according to Claim 2 or 3, characterised in that the attachment means are compounded with a hexagonal locking stud (25) per- pendicularto the plane ofthe arm (14) and integral with the tatter, said stud co-operating with a hexagonal blind hole (24) provided in the shaft of the root pivot (4).
6. Device according to one of Claims 1 to 5, characterised in that it comprises a C-shaped piece (21} attached on the inner ring (13) to close the notch (19).
EP83400695A 1982-04-08 1983-04-06 Safety abutment for the pivots of variable position stator vanes Expired EP0093631B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8206117 1982-04-08
FR8206117A FR2524934B1 (en) 1982-04-08 1982-04-08 SAFETY STOP DEVICE FOR VARIABLE SETTING STATOR BLADE PIVOT

Publications (2)

Publication Number Publication Date
EP0093631A1 EP0093631A1 (en) 1983-11-09
EP0093631B1 true EP0093631B1 (en) 1986-01-29

Family

ID=9272876

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83400695A Expired EP0093631B1 (en) 1982-04-08 1983-04-06 Safety abutment for the pivots of variable position stator vanes

Country Status (5)

Country Link
US (1) US4514141A (en)
EP (1) EP0093631B1 (en)
JP (1) JPS58206810A (en)
DE (1) DE3361967D1 (en)
FR (1) FR2524934B1 (en)

Families Citing this family (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2556410B1 (en) * 1983-12-07 1986-09-12 Snecma DEVICE FOR CENTERING THE INSIDE RING OF A VARIABLE TIMING FINS STATOR
FR2582720B1 (en) * 1985-05-29 1989-06-02 Snecma PROCESS FOR PRODUCING A TURBOMACHINE BLADE PIVOT AND A STATOR BLADE COMPRISING SAME
FR2583817B1 (en) * 1985-06-20 1988-07-29 Snecma TURBOMACHINE COMPRESSOR VARIABLE TIMING BLADE DRIVE CONTROL LINK
US4695220A (en) * 1985-09-13 1987-09-22 General Electric Company Actuator for variable vanes
US4792277A (en) * 1987-07-08 1988-12-20 United Technologies Corporation Split shroud compressor
FR2644525B1 (en) * 1989-03-15 1991-05-24 Snecma VARIABLE SETTING STATOR VANE RETENTION SYSTEM
US5492446A (en) * 1994-12-15 1996-02-20 General Electric Company Self-aligning variable stator vane
FR2742799B1 (en) * 1995-12-20 1998-01-16 Snecma INTERNAL END END OF PIVOTING VANE
US20080053547A1 (en) * 1997-11-24 2008-03-06 Yungrwei Chen Energy attenuation apparatus for a conduit conveying liquid under pressure, system incorporating same, and method of attenuating energy in a conduit
US6019574A (en) * 1998-08-13 2000-02-01 General Electric Company Mismatch proof variable stator vane
EP1205639A1 (en) * 2000-11-09 2002-05-15 General Electric Company Inner shroud retaining system for variable stator vanes
US6413043B1 (en) * 2000-11-09 2002-07-02 General Electric Company Inlet guide vane and shroud support contact
US6682299B2 (en) 2001-11-15 2004-01-27 General Electric Company Variable stator vane support arrangement
DE10161292A1 (en) 2001-12-13 2003-06-26 Rolls Royce Deutschland Bearing ring for the storage of blade roots of adjustable stator blades in the high pressure compressor of a gas turbine
GB2412947B (en) * 2004-04-07 2006-06-14 Rolls Royce Plc Variable stator vane assemblies
FR2875270B1 (en) * 2004-09-10 2006-12-01 Snecma Moteurs Sa RETENTION OF CENTERING KEYS OF STATOR UNDER RINGS WITH VARIABLE SETTING OF A GAS TURBINE ENGINE
GB0504588D0 (en) * 2005-03-05 2005-04-13 Rolls Royce Plc Pivot ring
US7249613B1 (en) 2006-02-03 2007-07-31 Dayco Products, Llc Energy attenuation device
US7717135B2 (en) * 2006-02-03 2010-05-18 Yh America, Inc. Energy attenuation device
DE102006024085B4 (en) * 2006-05-23 2020-04-16 MTU Aero Engines AG Turbo compressor in axial design
US20080210486A1 (en) * 2007-03-02 2008-09-04 Dayco Products, Llc Energy attenuation device
FR2928961B1 (en) * 2008-03-19 2015-11-13 Snecma SECTORIZED DISPENSER FOR A TURBOMACHINE.
FR2964710B1 (en) * 2010-09-14 2012-08-31 Snecma SOCKET FOR VANE WITH VARIABLE SHAFT
FR2995934B1 (en) * 2012-09-24 2018-06-01 Safran Aircraft Engines AUBE FOR TURBOMACHINE RECTIFIER
US9995166B2 (en) * 2014-11-21 2018-06-12 General Electric Company Turbomachine including a vane and method of assembling such turbomachine
DE102014223975A1 (en) * 2014-11-25 2016-05-25 MTU Aero Engines AG Guide vane ring and turbomachine
EP3421754B1 (en) * 2016-03-30 2021-12-01 Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. Variable geometry turbocharger
FR3053383B1 (en) * 2016-07-04 2019-08-02 Safran Aircraft Engines CLINCHING RETENTION OF SLEEVES OF VARIABLE-SETTING AUBES CONTROL RINGS AND TURBOREACTOR INCORPORATING THE SAME
FR3055374B1 (en) * 2016-08-23 2018-08-03 Safran Aircraft Engines INTERFACE PIECE FOR RECONDITIONING A CONTROL RING OF A MOTOR COMPRESSOR, AND ASSOCIATED RECONDITIONING METHOD
DE102016215807A1 (en) * 2016-08-23 2018-03-01 MTU Aero Engines AG Inner ring for a vane ring of a turbomachine
DE102017109952A1 (en) * 2017-05-09 2018-11-15 Rolls-Royce Deutschland Ltd & Co Kg Rotor device of a turbomachine
GB201715165D0 (en) 2017-09-20 2017-11-01 Rolls Royce Plc Bearing assembly
DE102018210601A1 (en) * 2018-06-28 2020-01-02 MTU Aero Engines AG SEGMENT RING FOR ASSEMBLY IN A FLOWING MACHINE
DE102018213983A1 (en) * 2018-08-20 2020-02-20 MTU Aero Engines AG Adjustable guide vane arrangement, guide vane, seal carrier and turbomachine
CN112096658B (en) 2020-11-06 2021-01-22 中国航发上海商用航空发动机制造有限责任公司 Aircraft engine compressor and adjustable stator blade position retaining structure thereof
FR3123885B1 (en) * 2021-06-15 2023-06-16 Safran Aircraft Engines NON-FULL TURBOMACHINE RECTIFIER EQUIPPED WITH STATOR BLADES FIXED TO PIVOTS AND CORRESPONDING TURBOMACHINE
US20240318659A1 (en) * 2023-03-20 2024-09-26 Emerson Climate Technologies, Inc. Variable inlet guide vane apparatus combined with compressor end cap

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1570536A (en) * 1925-02-20 1926-01-19 Morgan Smith S Co Gate stop for turbine construction
GB621175A (en) * 1946-11-16 1949-04-05 Power Jets Res & Dev Ltd Improvements in or relating to stator blading of compressors and like machines
FR1041161A (en) * 1951-08-14 1953-10-21 Napier & Son Ltd Improvements to axial fluid flow reaction apparatus comprising at least one row of radial vanes
BE556572A (en) * 1955-08-16
US3029067A (en) * 1956-05-31 1962-04-10 Garrett Corp Variable area nozzle means for turbines
DE1047538B (en) * 1956-10-29 1958-12-24 Siemens Ag Rotatable guide vane with limited range of rotation, especially for turbines, e.g. B. gas turbines
FR1281702A (en) * 1960-03-15 1962-01-12 Daimler Benz Ag Adjustable guide vane bearing device for gas turbines or hot air turbines
US3107546A (en) * 1960-04-25 1963-10-22 Pacific Valves Inc Internal stop means for valves
US3303992A (en) * 1965-03-03 1967-02-14 Gen Motors Corp Variable vane stator ring
NO119216B (en) * 1965-04-12 1970-04-06 Nydqvist & Holm Ab
US3295827A (en) * 1966-04-06 1967-01-03 Gen Motors Corp Variable configuration blade
US3367628A (en) * 1966-10-31 1968-02-06 United Aircraft Corp Movable vane unit

Also Published As

Publication number Publication date
DE3361967D1 (en) 1986-03-13
JPS58206810A (en) 1983-12-02
EP0093631A1 (en) 1983-11-09
US4514141A (en) 1985-04-30
FR2524934B1 (en) 1986-12-26
FR2524934A1 (en) 1983-10-14
JPH029161B2 (en) 1990-02-28

Similar Documents

Publication Publication Date Title
EP0093631B1 (en) Safety abutment for the pivots of variable position stator vanes
EP1887188B1 (en) Control device of a variable pitch angle blade of a turbomachine with cylindrical connecting rod
EP1873401B1 (en) Turbomachine rotor and turbomachine comprising such a rotor
EP1561907B1 (en) Turboreactor with fan mounted on a drive shaft supported by a first and a second bearing
EP1696134B1 (en) Regulation device for centering the unison ring for the variable stator vanes of a turbomachine.
EP2260197B1 (en) Contra-rotating propeller system with device for feathering propeller blades
EP4110691A1 (en) Fan rotor with variable pitch blades and turbomachine equipped with such a rotor
CA2902851C (en) Variable-pitch vane
EP0052534B1 (en) Butterfly valve
EP3915872B1 (en) Actuator provided with a fuse system with fluid damping and vehicle provided with said actuator
FR2682157A1 (en) Dawn control rod and network of such rods.
EP0209428B1 (en) Actuation lever for a stator vane with variable incidence
EP2721293B1 (en) Vertical axis wind turbine with braking device
EP1564381B1 (en) Actuator lever for setting the angular position of guide vanes in a turbo machine
FR2609506A1 (en) Multi-use fan
EP2630335B1 (en) Hydraulic device for changing the pitch of a propeller
FR2897120A1 (en) Pivot for variable-angle turbine compressor blade has one or more flat surfaces to co-operate with matching surfaces in angle adjustment lever
EP0143061B1 (en) Propeller pitch automatic regulation device
EP0981478A1 (en) Rotor blade, in particular for helicopter antitorque tail rotor
FR2607107A1 (en) HELICOPTER ROTOR
FR2877059A1 (en) Connecting rod for driving variable pitch vane, has drill and opening, where rod is under form of U shaped tongue folded on itself according to single folding along transversal direction so that drill and opening are opposite to each other
FR2876752A1 (en) Variable pitch mechanical device for wind turbine, has sliding hub carrying blade shanks including flange and toothed sector that is actuated by rack integrated to guide pin held by fixed hub, and centrifugal regulators connecting two hubs
FR3123696A1 (en) PROPELLER BLADE ANGULAR PITCH CONTROL SYSTEM FOR AN AIRCRAFT TURBOMACHINE
EP0253694B1 (en) Distributor for an internal combustion engine, particularly in a motor vehicle
CH588016A5 (en) Fan with pivoted radial blades - has blades turned from stationary to operating position by centrifugal force

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19830418

AK Designated contracting states

Designated state(s): DE FR GB

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE FR GB

REF Corresponds to:

Ref document number: 3361967

Country of ref document: DE

Date of ref document: 19860313

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: FR

Ref legal event code: CL

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19930324

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19930326

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19930630

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19940406

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19940406

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19941229

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19950103

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST