EP0754838B1 - Commande manuelle débrayable pour l'entraínement du rotor d'une turbomachine - Google Patents
Commande manuelle débrayable pour l'entraínement du rotor d'une turbomachine Download PDFInfo
- Publication number
- EP0754838B1 EP0754838B1 EP96401418A EP96401418A EP0754838B1 EP 0754838 B1 EP0754838 B1 EP 0754838B1 EP 96401418 A EP96401418 A EP 96401418A EP 96401418 A EP96401418 A EP 96401418A EP 0754838 B1 EP0754838 B1 EP 0754838B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shaft
- casing
- drive shaft
- rotor
- turbomachine
- 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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/34—Turning or inching gear
Definitions
- the invention relates to a turbomachine, and more particularly a way to manually train the rotor rotation for endoscopic control of the blades of this rotor.
- Turbomachinery and in particular turboshaft engines for aircraft are subject to inspections and controls regular. Some inspections are done using endoscopes that are introduced inside the turbine engine by closable openings provided for this purpose and which allow examination without disassembly of non- visible from the outside.
- an endoscope is introduced into the fluid vein by closable openings of the turbine engine housing, and successively each dawn in front of the endoscope by making turn the rotor step by step. This step-by-step rotation of the rotor is usually done by hand training an organ turning mechanically connected to the rotor.
- This opening is usually closed by a cover that must be removed and then put back when the operation is finished. Sometimes it's a piece of equipment that needs to be removed to access the shaft transmitting the movement to this equipment.
- the invention proposes to train a turbomachine shaft connected in rotation to the rotor, to the by means of a drive shaft passing through the wall of the casing surrounding the tree to be trained, the training tree and the tree to train being connected together by a disengageable coupling controlled by a declutching means automatic.
- An at least static sealing means effective at least in the disengaged position, is arranged between the drive shaft and the housing.
- the training tree will be rotated by its end outside the casing.
- the drive shaft, the means of automatic declutching and the sealing means at least static are mounted on a removable support fixed to the housing on the opening to reach the tree to train.
- the drive shaft will be coaxial with the shaft to train, which simplifies the coupling of which the automatic release can be ensured by a spring pushing the drive shaft outward.
- Figure 1 is a simplified sectional view of a turbofan of the turbofan type with double body and double flow showing the kinematic chain from the rotor to the gearbox.
- FIG. 2 illustrates an example of the state of the art.
- FIG. 3 illustrates an example of implementation of the invention.
- the turbomachine 1 is a double-body turbofan and double flow of a well known and commonly used type for propel transport aircraft. We will not describe this fact that the parts of the turbomachine 1 related to the invention.
- the high pressure rotor 2 has a shaft 3 integral with several stages of blades 4 of the high compressor pressure at the front of the combustion chamber 5, and integral with one or more stages of blades 6 of the turbine the rear of said chamber 5.
- the low pressure rotor 7 comprises a shaft 8 coaxial and inside the shaft 3, this shaft 8 being integral with the front of a stage of fan blades 9 and of several stages of blades 10 of the low pressure compressor, this shaft 8 also being integral with the back of one or several stages of blades 11 of the low pressure turbine.
- the kinematic chain going from the shaft 3 of the high rotor pressure at the equipment support 14 comprises a succession of shafts 16 operating inside housings 20 and connected in rotation directly or indirectly to the rotor 2. There is thus successively a first bevel gear 15 to 90 ° with two bevel gears, a first shaft transmission 16a perpendicular to shaft 3, a second angle gear 17 at 90 ° with two bevel gears, and one second transmission shaft 16b parallel to the shaft 3 and driving in rotation one of the shafts and pinions 16c of equipment support 14.
- Different equipment, such as starter or oil or fuel pumps are connected to the shafts and pinions 16c of the equipment support 14. Because difficult operating conditions, the components 16 of the drive train operate at inside of waterproof housings 20 and are lubricated by oil or oil mists.
- the low pressure rotor 7 is directly accessible from the outside of the engine from the front or rear, and the step by step rotation of said low pressure rotor is done simply by hand.
- the high pressure rotor 2 is not directly accessible from outside the motor, and the stepwise rotation of said rotor 2 takes place in hand-driving one of the trees 16.
- the equipment support 14 comprises a casing 20c surrounding and supporting a plurality of shafts and pinions 16c meshing with each other.
- the shaft referenced 16b in FIG. 1 transmits the movement to one of the shafts and pinions 16c of the equipment support 14 by means of a coupling generally of the fluted type 21. This movement is transmitted gradually. with different trees and gables 16c.
- An opening 22 in the casing 20c is arranged opposite the end of a shaft 16c and is closed by a removable cover 23, while a non-circular bore, for example square 24 is arranged in the geometric axis 25 and at the end 26 of the shaft 16c.
- a drive shaft 30 of geometric axis 31 aligned with the geometric axis 25 is held by a support 32 opposite the end 26 of the shaft 16c.
- the shaft 30 ends on the side of the shaft 16c by a non-circular male end piece 33 of shape complementary to that of the bore 24 and capable of being introduced into this bore by a translation of the shaft 30 in the direction of the shaft 16c along the geometric axis 31.
- the end piece 33 and the bore 24 constitute a disengageable coupling which will be generally referenced 34.
- the drive shaft 30 is guided in translation and rotation by a bearing 35 located in its middle part. This guidance is sufficient when the end piece 33 is introduced into the bore 24, that is to say when the shaft 31 is in the engaged position.
- the shaft 31 will also be guided by a second bearing 36 which can be reduced to a simple bore in the support 32, the shaft 31 being supported in this bearing 36 by the outermost parts of the end cap 33.
- the shaft 30 has in its middle part a shoulder 37 against which comes to rest the end of a spring helical 38 surrounding the shaft 31, while the other end of the spring 38 bears against the support 32.
- the shoulder 37 can also be constituted by a circlip.
- the spring 38 pushes the shaft 31 outwards into position disengaged, the spring 38 and the shoulder 37 constituting more usually an automatic declutching means 39 of the coupling 34.
- the shaft 30 arrives by its shoulder 37 abutting against the bearing 35, said shoulder 37 thus ensuring an axial retention function from tree 30.
- the sealing means 40 of the shaft 30 relative to the casing 20c is preferably ensured by a lip seal 40a mounted in the support 32 and pressing on a circular surface 40b of the tree 30.
- the surface 40b will be slightly conical with a slightly smaller diameter towards the end 41 of the shaft 30 furthest from the casing 20c, this reduction in diameter being sufficient for the contact between seal 40a and surface 40b becomes weak or nonexistent during manual rotation of the rotor.
- a joint will be used 40a graphite-loaded Teflon ring with a section U-shaped opening opening facing the inside of the housing parallel to the geometric axis 31 of the shaft 30, sealing being achieved by the support of the U-shaped wings respectively on the surface 40b in its most part large diameter and against the bore not referenced in which is placed the seal 40a.
- an annular spring not referenced surrounds the inner wing of the U and increases the pressure exerted by the seal 40a on the surface 40b.
- seal 40a is available for example under the brand BALSEAL commercial.
- a lip seal 40a with the lip turned inward is the preferred solution because during the operation of the turbomachine, it creates an overpressure inside the casing 20c which presses said lip on the surface 40b, which improves the sealing and reliability of the present device. Conversely when stationary, the overpressure no longer exists, the support of the lip of the seal 40a on the surface 40b is relaxed, which reduces the friction of the medium seal 40 and facilitates the operation of the shaft 30.
- the reliability of the seal 40 is further improved by the taper of the surface 40b. Indeed, when we operate the shaft 30 to rotate the shaft 16c, it is necessary to press the shaft 30 in the casing to couple it to the shaft 16c, the joint 40a then being on surface 40b towards the end 41 of the shaft 31, the cylindrical surface 40b having a smaller diameter towards the end 41, the seal 40a no longer pressing lightly or not at all on the surface 40b, the seal 40a no longer risking being deteriorated or worn by the rotation of the shaft 30 or the radial deflection of this shaft 30 resulting from the play on the stages 35 and 36.
- the support 32 will advantageously include a base 45 positioned in the bore 22a and the outer face 22b of the opening 22, and a cylinder 46, one end 46a of which is positioned on the base 45 while its other end 46b the outermost of the casing 20c receives the means 40.
- the bearing 36 is positioned in the base 45 and the bearing 35 in the cylinder 46, the spring 38 taking support on the base 45.
- the base 45 is statically sealed relative to the casing 20a, and the cylinder 46 is sealed by compared to base 45 for example by simple seals toric.
- the cylinder 46 surrounds the middle part of the shaft 33, the bearing 35 and the automatic declutching means 39, and thus ensures the protection of these organs.
- Support 32 is fixed on the casing 20c, for example by screws not depicted, as would be the cover of art prior.
- the end 41 of the shaft 30 has a bore 50 no circular, for example square, and centered on its axis geometric 31. This bore makes it possible to couple a means of removable preemption of the shaft 30, for example a wrench standard ratchet or flywheel not shown, for manipulate this tree 30.
- the end 41 of the shaft 31 will be protected protruding from cylinder 46 by a removable cap 51, fixed on cylinder 46, and at least dustproof by compared to this cylinder 46.
- the relative arrangement and the mode of coupling of the shafts 16 and 30 may be subject to variants.
- the static seal between the shaft 30 and the support 32 can also be ensured by a steep conical shoulder on the shaft 30 penetrating in the disengaged position in a bore of complementary shape of the support 32, the conical shoulder comprising at its surface a groove and an O-ring which ensures a perfect seal with the tapered bore without rubbing against it during disengagement.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Description
Ainsi, pour faire tourner manuellement et pas à pas le rotor haute pression et amener successivement chaque aube 4 ou 6 devant un endoscope, il faut démonter le couvercle 23, introduire un volant ou une manivelle à embout carré dans l'alésage carré 24 et actionner ledit volant ou ladite manivelle. Si l'on oublie ensuite de remettre le couvercle 23, l'huile distribuée à l'intérieur du carter 20c pendant le fonctionnement de la turbomachine s'échappe par l'ouverture 22, ce qui provoque l'épuisement rapide de la réserve d'huile de la turbomachine, avec pour conséquence l'endommagement puis la panne de ladite turbomachine.
L'arbre d'entraínement 30 est guidé en translation et rotation par un palier 35 situé dans sa partie médiane. Ce guidage est suffisant lorsque l'embout 33 est introduit dans l'alésage 24, c'est à dire lorsque l'arbre 31 est en position embrayé. Avantageusement, on guidera aussi l'arbre 31 par un second palier 36 qui peut se réduire à un simple alésage dans le support 32, l'arbre 31 s'appuyant dans ce palier 36 par les parties les plus à l'extérieur de l'embout 33.
Le moyen d'étanchéité 40 agit dans ces conditions d'une manière statique, ce qui lui donne une grande fiabilité malgré l'environnement sévère et autorise la mise en oeuvre de moyens peu coûteux.
L'étanchéité statique entre l'arbre 30 et le support 32 peut aussi être assurée par un épaulement conique à forte pente sur l'arbre 30 pénétrant en position débrayée dans un alésage de forme complémentaire du support 32, l'épaulement conique comportant à sa surface une rainure et un joint torique qui assure une étanchéité parfaite avec l'alésage conique sans frotter contre celui-ci pendant le débrayage.
Claims (6)
- Turbomachine équipée d'un dispositif d'entraínement manuel de son rotor (2), caractérisée en ce qu'elle comporte:a) un carter (20) contenant un arbre (16) connecté en rotation audit rotor (2), ledit carter (20) comportant une ouverture (22) permettant d'atteindre l'arbre (16),b) un arbre d'entraínement (30) traversant la paroi du carter (20) par l'ouverture (22), cet arbre d'entrainement (30) étant tenu par un support amovible (32) monté sur l'ouverture (22),c) un moyen d'accouplement en rotation débrayable (34) des arbres (16) et (30),d) un moyen de débrayage automatique (39) dudit accouplement (34),e) un moyen d'étanchéité au moins statique (40) entre l'arbre d'entraínement (30) et la paroi du carter (20), ledit moyen d'étanchéité (40) étant actif au moins lorsque l'arbre (30) est en position débrayée.
- Turbomachine conforme à la revendication 1, caractérisée en ce que l'arbre d'entraínement (30), est susceptible d'un mouvement de translation axiale et poussé en position débrayée vers l'extérieur par un ressort (38).
- Turbomachine conforme à la revendication 2, le moyen d'étanchéité (40) comportant un joint (40a) solidaire du support amovible (32), ledit joint (40a) appuyant sur une surface circulaire (40b) de l'arbre d'entraínement (30), caractérisé en ce que la surface circulaire (40b) est conique avec un diamètre plus faible vers l'extrémité (41) de l'arbre (30) la plus éloignée du carter (20), afin de réduire ou de supprimer le contact entre le joint (40a) et la surface (40b) pendant la rotation manuelle du rotor.
- Turbomachine conforme à l'une quelconque des revendications 1 à 3, caractérisée en ce que l'arbre d'entraínement (30) est coaxial à l'arbre à entraíner (16), et en ce que l'accouplement s'effectue par interpénétration d'un alésage (24) non circulaire de l'arbre (16) avec un embout (33) de l'arbre (30), ledit embout (33) ayant une forme complémentaire audit alésage (24).
- Turbomachine conforme à l'une quelconque des revendications 1 à 4, caractérisé en ce que le carter (20) est le carter (20c) du support d'équipement (14).
- Turbomachine conforme à l'une quelconque des revendications 1 à 5, caractérisée en ce que l'extrémité (41) de l'arbre d'entraínement extérieure au carter (20) est recouverte par un capuchon de protection amovible (51) étanché statiquement au moins à la poussière.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9507754 | 1995-06-28 | ||
FR9507754A FR2736092B1 (fr) | 1995-06-28 | 1995-06-28 | Commande manuelle debrayable pour l'entrainement du rotor d'une turbomachine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0754838A1 EP0754838A1 (fr) | 1997-01-22 |
EP0754838B1 true EP0754838B1 (fr) | 1999-03-10 |
Family
ID=9480460
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96401418A Expired - Lifetime EP0754838B1 (fr) | 1995-06-28 | 1996-06-27 | Commande manuelle débrayable pour l'entraínement du rotor d'une turbomachine |
Country Status (4)
Country | Link |
---|---|
US (1) | US5813829A (fr) |
EP (1) | EP0754838B1 (fr) |
DE (1) | DE69601672T2 (fr) |
FR (1) | FR2736092B1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7685826B2 (en) | 2005-12-12 | 2010-03-30 | General Electric Company | Methods and apparatus for performing engine maintenance |
CN1940253B (zh) * | 2005-08-02 | 2010-11-10 | 诺沃皮尼奥内有限公司 | 用于涡轮机检查的运动*** |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6553327B2 (en) * | 1998-09-16 | 2003-04-22 | Yeda Research & Development Co., Ltd. | Apparatus for monitoring a system with time in space and method therefor |
US6382909B1 (en) * | 1999-05-14 | 2002-05-07 | Dresser-Rand Company | Rotary turning apparatus |
DE10334448B4 (de) * | 2003-07-29 | 2005-09-01 | Renk Ag | Windkraftanlage |
US7354216B2 (en) * | 2005-04-12 | 2008-04-08 | Honeywell International, Inc. | Grease seal cup to retain lubrication for life extension in existing splined joint |
US7866234B2 (en) * | 2007-08-15 | 2011-01-11 | General Electric Company | Manual core rotation device |
GB0901059D0 (en) * | 2009-01-23 | 2009-03-11 | Rolls Royce Plc | Rotation arrangement |
FR2952121B1 (fr) * | 2009-10-29 | 2011-12-23 | Snecma | Dispositif d'entrainement mecanique du corps haute pression d'un moteur d'avion |
CN102741547B (zh) | 2010-02-03 | 2015-08-12 | 三菱重工业株式会社 | 用于风力涡轮发电机的转子转动装置和转子转动方法 |
US8438949B2 (en) * | 2010-08-02 | 2013-05-14 | Hamilton Sundstrand Corporation | Sealed rotator shaft for borescopic inspection |
US8845275B2 (en) | 2010-11-11 | 2014-09-30 | Hamilton Sundstrand Corporation | Cranking pad interlock |
US8813607B2 (en) * | 2011-06-20 | 2014-08-26 | Hamilton Sundstrand Corporation | Fail-safe manual rotator cover |
EP2602442B1 (fr) * | 2011-12-05 | 2014-08-13 | Hamilton Sundstrand Corporation | Verrouillage de manivelle d'antrainement |
FR2986568B1 (fr) * | 2012-02-07 | 2016-06-10 | Snecma | Dispositif d'etancheite avec joint hydraulique du passage d'un arbre rotatif au travers d'une paroi d'une enceinte. |
FR2995361B1 (fr) * | 2012-09-07 | 2014-08-29 | Snecma | Dispositif de bouchage d'une ouverture d'une paroi d'enceinte pour l'acces a un arbre rotatif. |
FR3038715B1 (fr) * | 2015-07-07 | 2020-12-25 | Snecma | Identification de capteurs dans une turbomachine |
US10823014B2 (en) | 2017-12-13 | 2020-11-03 | General Electric Company | Turbine engine for reducing rotor bow and method thereof |
FR3108660B1 (fr) | 2020-03-24 | 2022-03-11 | Safran Aircraft Engines | Actionneur de mise en rotation d’un rotor de turboréacteur pour une opération d’inspection et/ou de maintenance |
US11608757B2 (en) * | 2020-04-02 | 2023-03-21 | Parker-Hannifin Corporation | Crank device for performing turbine engine maintenance |
US11549443B2 (en) | 2020-08-28 | 2023-01-10 | Pratt & Whitney Canada Corp. | Sealing arrangement with vent for an engine component with a service port |
US11629648B2 (en) | 2020-12-17 | 2023-04-18 | Hamilton Sundstrand Corporation | Quick access engine rotator pad |
CN112846341B (zh) * | 2021-01-05 | 2022-02-01 | 山东省章丘鼓风机股份有限公司 | 一种小尺寸冷却风扇插床工装 |
CN112761744B (zh) * | 2021-01-26 | 2022-09-27 | 东方电气集团东方汽轮机有限公司 | 一种独立的手动盘车装置及盘车结构 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3150750A (en) * | 1959-10-27 | 1964-09-29 | Auxiliaire D Ind Sadi S P R L | Device for automatically disengaging a handwheel mounted on a shaft which is adaptedto be driven by means of a servo-motor |
DE2310200C2 (de) * | 1973-03-01 | 1982-03-25 | Elektro-Mechanik Gmbh, 5963 Wenden | Stellantrieb, für Ventile, Schieber, Schleusen und Tore |
US3916939A (en) * | 1974-11-25 | 1975-11-04 | Clarence Gillard | Locktop fire hydrant |
JPS5728188U (fr) * | 1980-07-23 | 1982-02-15 | ||
US4518148A (en) * | 1980-09-26 | 1985-05-21 | Renfro Wesley E | Hydraulic choke device |
DE3150797A1 (de) * | 1981-12-22 | 1983-06-30 | AEG-Kanis Turbinenfabrik GmbH, 8500 Nürnberg | Rotordrehvorrichtung fuer kraft- oder arbeitsmaschinen |
US4781211A (en) * | 1985-06-03 | 1988-11-01 | Cormier George J | Lock for a valve |
DE3521397C1 (de) * | 1985-06-14 | 1986-10-23 | Elektro-Mechanik Gmbh, 5963 Wenden | Kupplungsvorrichtung zum Umschalten zwischen Motor- und Handbetätigung eines Stellantriebs |
US4733529A (en) * | 1986-09-26 | 1988-03-29 | Cef Industries, Inc. | Performance envelope extension device for a gas turbine engine |
US5513831A (en) * | 1995-05-17 | 1996-05-07 | Seward; Alfred L. | Safety control knob for hot water valve |
-
1995
- 1995-06-28 FR FR9507754A patent/FR2736092B1/fr not_active Expired - Fee Related
-
1996
- 1996-06-27 EP EP96401418A patent/EP0754838B1/fr not_active Expired - Lifetime
- 1996-06-27 DE DE69601672T patent/DE69601672T2/de not_active Expired - Fee Related
- 1996-06-28 US US08/672,915 patent/US5813829A/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1940253B (zh) * | 2005-08-02 | 2010-11-10 | 诺沃皮尼奥内有限公司 | 用于涡轮机检查的运动*** |
US7685826B2 (en) | 2005-12-12 | 2010-03-30 | General Electric Company | Methods and apparatus for performing engine maintenance |
Also Published As
Publication number | Publication date |
---|---|
EP0754838A1 (fr) | 1997-01-22 |
DE69601672D1 (de) | 1999-04-15 |
DE69601672T2 (de) | 1999-09-09 |
US5813829A (en) | 1998-09-29 |
FR2736092B1 (fr) | 1997-08-01 |
FR2736092A1 (fr) | 1997-01-03 |
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