EP1314856B1 - Device for locking blades in a disk groove - Google Patents
Device for locking blades in a disk groove Download PDFInfo
- Publication number
- EP1314856B1 EP1314856B1 EP02292896A EP02292896A EP1314856B1 EP 1314856 B1 EP1314856 B1 EP 1314856B1 EP 02292896 A EP02292896 A EP 02292896A EP 02292896 A EP02292896 A EP 02292896A EP 1314856 B1 EP1314856 B1 EP 1314856B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- groove
- screw
- screw head
- locking element
- wheel according
- 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
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Classifications
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- 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
- F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
- F01D5/32—Locking, e.g. by final locking blades or keys
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- 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
- F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
- F01D5/3023—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses
- F01D5/303—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses in a circumferential slot
- F01D5/3038—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses in a circumferential slot the slot having inwardly directed abutment faces on both sides
Definitions
- the invention relates to a turbomachine wheel comprising a disk, vanes and a device for blocking vanes in the groove turbomachine disk device, said blades having hammer-type feet capable of being introduced into said groove through a loading window and held in said groove by form cooperation with the side walls of the latter, locking device being capable of being introduced into said groove by said loading window and having an element of locking arranged in the space separating two consecutive blades of dawn and capable of being reassembled in a lock housing provided in the side walls of said groove under the action of a maneuvering screw radial whose head is supported on the bottom of the groove, a radial clearance being provided between the bottom of the groove and the underside of the blade roots.
- the screw head which is wider than the cask in the bottom of the groove to the right of the corresponding lock housing. Because the screw head is wider than the barrel, the screw is returned captive.
- the locking element is consisting of a protrusion formed on the upper face of a body which is in the locking position of the device and bears against the walls side of the groove in the vicinity of the groove of the groove.
- This body has a lower base which, in the locking position of the device, is moved away from the screw head to allow sliding said body in the groove during assembly of the blades. Indeed for allow this sliding, the outgrowth formed on the body must be find in the groove, the base of the body is then in support on the head of screw and located near the bottom of the groove.
- the one-piece piece constituted by the body and its outgrowth does not include positive guiding means when sliding in the groove during assembly.
- the screw head can therefore be improperly positioned in its footprint during tightening, which may result in a subsequent displacement of the screw head during the operation of the turbomachine and by a loss of the bracing effect. Tightening the incorrectly positioned screw may also cause seizure of the thread, which can ensure maintenance of the outgrowth in the lock slot, but what later causes difficulties to dismantle the device during maintenance operations.
- the element of lock is axially slidably mounted in a radial opening of a body having a section adapted to the section of the groove and immobilized radially and the head of the screw is trapped between the bottom of the groove and the base of the body.
- Means are provided to limit the raising of the locking element.
- the body is guided during its sliding in the groove, which ensures a precise radial direction of the axis of the screw and avoids seizures.
- the screw head is radially immobilized relative to the body, and the action of centrifugal forces on the element of when the screw is loosened partially, prevents the screw from turn, because the screw head is then in positive support against the base from the body.
- the body is placed between the feet of a pair of blades and has a section adapted to the section of said groove. It has a base lower located above the bottom of the groove and a radial opening through non-circular section in which the element of lock is slidably mounted under the action of the operating screw.
- the screw head is dimensioned so as to remain trapped between the bottom of the groove and the base of the body.
- the body section in a plane perpendicular to the axis of the operating screw is greater than the section of the locking element in the same plane, and the section of the screw head is also greater than the section of the locking element so that the face top of the screw head can bear against the base of the body.
- the object of the invention is to propose a turbomachine wheel comprising a locking device which overcomes this disadvantage and which can be housed in a reduced circumferential space.
- the diameter of the screw head is greater than the distance between the two feet of dawn adjacent.
- the locking device then comprises two parts: the element lock and the maneuvering screw.
- a intermediate plate is interposed between the screw head and the locking, the ends of said plate being arranged under both dawn feet adjacent.
- the plate has means for preventing its rotation relative to the locking element.
- These means consist for example of radial tabs that allow the rise of the element of lock during assembly.
- the plate also comprises means to immobilize in rotation the screw head.
- These means consist of preferably by radial tabs pressing on the sides of the head quote. These tongues are flexible to allow rotation of the screw, during assembly, during the ascent of the locking element.
- the element of locking has a greater protrusion in the vicinity of the end of the screw which is housed in the hole in the platforms two adjacent blades. This sleeve serves as a visual indicator of raising of the locking element.
- FIG. 3 shows in section a wheel disc 1 of turbomachine which has at its periphery a groove 2 for keep the dawn feet hammer tie type.
- This groove 2 delimited by lateral walls 3a and 3b of curvilinear section, opens to the outside by a groove 4 which has a dimension, in the direction of the axis of rotation of the wheel, smaller than the dimension of the cavity 5 formed in the bottom of the groove 2.
- the feet of the blades have a section according to the plan radial axis passing through the axis of rotation of the disc 1 adapted to the section of the groove 2 in order to be maintained by form cooperation.
- Figure 1 is a top view of a portion of the disc 1.
- the side walls 3a and 3b have vis-à-vis a first pair of radial notches 6a and 6b which constitute a loading window, allowing the introduction feet 7 of the blades 8 in the groove 2 during assembly of these blades 8, as well as a second pair of radial indentations 9a, 9b which constitute a housing for the lock of an object blade locking device of the invention.
- the second pair of indentations 9a, 9b is offset angularly with respect to the first pair of notches 6a, 6b of a distance equal to the angle formed by two consecutive blades or multiple of this angle.
- the same wheel disc 1 can comprise several locking devices according to the invention.
- FIG. 2 shows the same part of disk 1 equipped with its 8.
- Each blade 8 has between its foot 7 and its aerodynamic portion 10, a platform 11 which covers the periphery of the disk 1, all of the platforms 11 of the vanes 8 defining internally the vein of the gas stream.
- All the blades 8 are identical except for the penultimate climb, referenced 8a, and the last climb, referenced 8b, which have on the adjacent edges of their platforms 11a and 11b notches 12a and 12b which constitute an orifice 13 whose function will be explained later in this memo.
- a locking device 14 is inserted through the window of loading in the groove 2, then we position the foot 7 of the last dawn in the loading window between the last dawn climb 8a and the first dawn mounted and we slide all of all blades 8 in the direction and the arrow F, an angle corresponding to the half-measure the angle between two consecutive blades, so that the platforms 11a and 11b of the first dawn mounted 8a and the last dawn climb 8b are joined according to the median plane and the window of loading constituted by the first pair of notches 6a and 6b. In this position, the locking device 14 disposed between the feet 7 of the blades 8a and 8b is opposite the second pair of indentations 9a and 9b.
- the indentations 9a and 9b have axial dimensions and lower than those of the indentations 6a and 6b of the window of loading blades 8, to prevent the vanes from escaping 8 when they pass in front of these indentations 9a and 9b.
- Figures 3 to 5 show a first embodiment of the locking device 14 which consists of two pieces, namely a locking element 16 and an operating screw 17.
- the locking element 16 has a section, in a radial plane passing through the axis of rotation of disk 1, which is drawn from way that the locking element 16 can slide in the groove 2 during assembly. It has a radial tapping equipped with a thread 31 intended to cooperate with the thread of the barrel 40 of the operating screw 17.
- the operating screw 17 comprises a screw head 41 of large size which lodges in the annular space 21 delimited by the underside 15 of the feet 7 and the bottom of the groove 2.
- the diameter of this head 41 is greater than the distance between the two blade roots 7a and 7b adjacent to them, as shown in Figure 4.
- the peripheral part of the upper face 42 of the screw head 41 can therefore bear against the underside 15 of these two blade roots 7a and 7b, which limits the possible radial displacement of the screw head 41.
- This end 43 is provided with means cooperating with a clamping wrench of the type "Allen” for example, in order to be able to reassemble the locking element 16 radially outward when positioned in front of the second pair of indentations 9a and 9b.
- the circumferential dimension of the indentations 9a and 9b is advantageously less than the distance separating the two feet of dawn consecutive 7a and 7b.
- the circumferential dimension of the base 23 of the locking element 16 is substantially equal to or less than the distance between the two adjacent blade roots 7a and 7b, while the circumferential dimension of the upper part of the element of locking is substantially equal to the circumferential dimension of notches 9a and 9b, at least in the zones 22a, 22b which are to house in these indentations 9a and 9b, after the rise of the element of lock 16.
- the zones 22a and 22b are arranged in the cavity 5 of the groove 2, when the element of lock is in the lowered position. It is the same with the base 23 of the locking element 16, whose lower face 24 is then at little distance above the upper face 42 of the screw head.
- the forces centrifugal forces exerted on the locking element 16 tend to push the latter and the maneuvering screw outwards.
- the side walls 25a and 25b of the base 23 are then in positive support against the side walls 3a and 3b of the groove 2, and in case of loosening of the operating screw 17, the displacement of the screw head 41 will be limited because the peripheral portion of the screw head 17 is retained by the adjacent blade roots 7a and 7b.
- the head of screw 17 may rest on the bottom of the groove 2, but the portions 22a and 22b of the locking element 16 will remain trapped in the notches 9a and 9b.
- References 26a and 26b designate radial protuberances, parallel to the axis of the operating screw 17, which extends radially outward above the top of the element of 16, and whose vertices are arranged in the hole 13 of the platforms 11a and 11b, when the locking element 16 is reassembled, to serve as a visual witness of the good recovery of the locking element 16, during assembly, or during the visits maintenance.
- the first embodiment of the invention described above requires that the diameter of the screw head 41 is greater than the spacing between the two adjacent blade roots 7a and 7b. This requires that the axial dimension of the underside 15 of a blade root is greater than the distance separating the two adjacent blade roots 7a and 7b.
- Figures 6 to 12 show a second embodiment of the invention which can be applied to any type of blisk of the type hammer attachment.
- the element 16 is almost identical to the one described above and will not be not described further. Only optional variants will be described.
- the operating screw 17, according to the second embodiment of the invention has a screw head 41, of small diameter and non-circular preference. This diameter is for example less than the distance separating the two adjacent blade roots 7a and 7b.
- an intermediate plate 50 is interposed between the screw head 41 and the locking element 16.
- This intermediate plate 50 which has a oblong shape, has a central orifice 51 through which the barrel 40 of the operating screw 17, and its circumferential dimension is such that its ends 52a and 52b are disposed under the two feet of dawn adjacent 7a and 7b.
- the upper face 42 of the screw head 17 bears on the underside of the intermediate plate 50, of which the ends 52a and 52b bear on the undersides 15 of the two adjacent dawn feet, which limits the radial displacement of the head of screw 41.
- the intermediate plate 50 which is made preferably from a sheet metal by cutting and folding, and which is shown in detail in FIGS. 9 to 11, comprises two radial tabs 53a and 53b that extend outward and that fit in radial grooves 54a and 54b formed on two opposite sides of the element of 16, as shown in Figure 12.
- the cooperation tongues 53a and 53b with grooves 54a and 54b prevents the plate intermediate 50 to rotate relative to the locking member 16, while permitting the sliding of the locking element 16 by relative to the intermediate plate 50, during the ascent or descent of the locking element.
- the grooves 54a and 54b are preferably on the face s of the locking element 16 which are opposite the faces adjacent to the two blade roots 7a and 7b.
- the intermediate plate 50 also includes and preferably two elastic tabs 55a and 55b which extend radially inward and intended to prevent loosening of the operating screw 17, the head 41 of the latter then comprising sections, six in number for example, on which the tabs 55a and 55b are in support.
- the elasticity of the tabs 55a and 55b is calculated so as to allow the rotation of the screw head 17 when a couple is exercised predetermined on the end 43 of the operating screw 17, during the raising or lowering of the locking element 16, and is sufficient to prevent the rotation of the screw head 17 in the absence of this torque.
- FIG. 9 shows the development of the intermediate plate 50, before folding tabs 53a, 53b, 55a and 55b.
- the orifice 51 is not circular.
- the centering of the intermediate plate 50 with respect to the screw maneuver 17 is achieved by the cooperation of the tongues 53a and 53b with the grooves 54a and 54b of the locking member 16.
- the orifice 51 however, it is dimensioned in such a way that the screw head 41 is bearing against the lower face 55 of the intermediate plate 50.
- the locking element 16 does not need radial grooves 54a and 54b described above, which serve to prevent rotation of the plate intermediate 50.
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- 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
L'invention concerne une roue de turbomachine comportant un disque, des aubes et un dispositif de blocage des aubes dans la rainure périphérique du disque de turbomachine, lesdites aubes comportant des pieds de type attache marteau susceptibles d'être introduits dans ladite rainure par une fenêtre de chargement et maintenus dans ladite rainure par coopération de forme avec les parois latérales de cette dernière, ledit dispositif de blocage étant susceptible d'être introduit dans ladite rainure par ladite fenêtre de chargement et comportant un élément de verrouillage disposé dans l'espace séparant deux pieds d'aube consécutifs et susceptible d'être remonté dans un logement de verrou ménagé dans les parois latérales de ladite rainure sous l'action d'une vis de manoeuvre radiale dont la tête est en appui sur le fond de la rainure, un jeu radial étant prévu entre le fond de la rainure et le dessous des pieds d'aube.The invention relates to a turbomachine wheel comprising a disk, vanes and a device for blocking vanes in the groove turbomachine disk device, said blades having hammer-type feet capable of being introduced into said groove through a loading window and held in said groove by form cooperation with the side walls of the latter, locking device being capable of being introduced into said groove by said loading window and having an element of locking arranged in the space separating two consecutive blades of dawn and capable of being reassembled in a lock housing provided in the side walls of said groove under the action of a maneuvering screw radial whose head is supported on the bottom of the groove, a radial clearance being provided between the bottom of the groove and the underside of the blade roots.
Il peut être prévu plusieurs dispositifs de verrouillage de ce
type par étage. En général, comme illustré dans le brevet GB 2 156 908, la
tête de vis qui est plus large que le fût loge dans une empreinte ménagée
dans le fond de la rainure au droit du logement de verrou correspondant.
Du fait que la tête de vis est plus large que le fût, la vis est rendue
imperdable. Dans les constructions actuelles, l'élément de verrouillage est
constitué d'une excroissance formée sur la face supérieure d'un corps qui
est en position de verrouillage du dispositif et en appui contre les parois
latérales de la rainure au voisinage de la gorge de la rainure. Ce corps
présente une embase inférieure qui, en position de verrouillage du
dispositif, est éloignée de la tête de vis, afin de permettre le coulissement
dudit corps dans la rainure au cours du montage des aubes. En effet pour
permettre ce coulissement, l'excroissance formée sur le corps doit se
trouver dans la rainure, l'embase du corps est alors en appui sur la tête de
vis et située au voisinage du fond de la rainure.It can be provided several locking devices of this
type per floor. In general, as illustrated in
Lorsque le dispositif est positionné en regard du logement de verrou, en faisant pivoter l'ensemble des aubes autour du disque, on remonte le corps vers l'extérieur en actionnant la vis de manoeuvre au moyen d'une clef s'adaptant sur l'extrémité de la vis opposée à la tête et positionnée dans un orifice ménagé dans les plates-formes des deux aubes adjacentes. Le maintien de l'excroissance dans le logement de verrou s'effectue par arc-boutement entre, d'une part, le corps de verrou en appui dans la gorge du disque et, d'autre part, la tête de vis logée dans une empreinte effectuée au fond de la rainure. Le système fonctionne selon le type vis/écrou et est freiné soit par une déformation locale, soit par un filet rapporté, soit par tout autre moyen.When the device is positioned next to the housing of latch, by rotating all the vanes around the disk, one move the body outwards by operating the maneuvering screw at means of a key fitting on the end of the screw opposite to the head and positioned in a hole in the platforms of both adjacent blades. The maintenance of the outgrowth in the housing of lock is made by bracing between, on the one hand, the lock body in the groove of the disc and, on the other hand, the screw head housed in an impression made at the bottom of the groove. The system works depending on the screw / nut type and is braked either by a local deformation or by an attached net, or by any other means.
Si l'on perd l'effet d'arc-boutement, seul l'auto-frein retient la vis et empêche l'excroissance de s'échapper du logement de verrou.If one loses the bracing effect, only the self-brake holds the screws and prevents the protrusion from escaping from the latch housing.
Par construction, la pièce monobloc constituée par le corps et son excroissance ne comporte pas de moyens de guidage positifs lors de son coulissement dans la rainure pendant le montage. La tête de vis peut donc être mal positionnée dans son empreinte au cours du serrage, ce qui peut se traduire par un déplacement ultérieur de la tête de vis au cours du fonctionnement de la turbomachine et par une perte de l'effet d'arc-boutement. Le serrage de la vis mal positionnée peut également entraíner un grippage du filetage, ce qui peut assurer un maintien de l'excroissance dans le logement de verrou, mais ce qui provoque ultérieurement des difficultés pour démonter le dispositif lors des opérations de maintenance.By construction, the one-piece piece constituted by the body and its outgrowth does not include positive guiding means when sliding in the groove during assembly. The screw head can therefore be improperly positioned in its footprint during tightening, which may result in a subsequent displacement of the screw head during the operation of the turbomachine and by a loss of the bracing effect. Tightening the incorrectly positioned screw may also cause seizure of the thread, which can ensure maintenance of the outgrowth in the lock slot, but what later causes difficulties to dismantle the device during maintenance operations.
En outre, lorsque la turbomachine est en fonctionnement, la vis est soumise à des forces centrifuges considérables, qui, si l'effet d'arc-boutement est perdu, peuvent entraíner une rotation de la vis qui sort alors dans la veine de gaz, ce qui, à la longue, peut libérer l'excroissance du logement de verrou lors de l'arrêt de la turbomachine.In addition, when the turbomachine is in operation, the screw is subject to considerable centrifugal forces, which, if the bracing effect is lost, can cause a rotation of the screw coming out then in the gas vein, which, in the long run, can release the outgrowth of the latch housing when stopping the turbomachine.
Dans un autre dispositif de blocage connu, l'élément de verrouillage est monté axialement coulissant dans une ouverture radiale d'un corps ayant une section adaptée à la section de la rainure et immobilisé radialement et la tête de la vis est emprisonnée entre le fond de la rainure et l'embase du corps. Des moyens sont prévus pour limiter la remontée de l'élément de verrouillage.In another known blocking device, the element of lock is axially slidably mounted in a radial opening of a body having a section adapted to the section of the groove and immobilized radially and the head of the screw is trapped between the bottom of the groove and the base of the body. Means are provided to limit the raising of the locking element.
Ainsi, le corps est guidé lors de son coulissement dans la rainure, ce qui assure une direction radiale précise de l'axe de la vis et évite les grippages. En outre, la tête de vis est radialement immobilisée par rapport au corps, et l'action des forces centrifuges sur l'élément de verrouillage, en cas de desserrage partiel de la vis, empêche celle-ci de tourner, du fait que la tête de vis est alors en appui positif contre l'embase du corps. Le corps est disposé entre les pieds d'une paire d'aubes et a une section adaptée à la section de ladite rainure. Il comporte une embase inférieure située au-dessus du fond de la rainure et une ouverture radiale traversante de section non circulaire dans laquelle l'élément de verrouillage est monté coulissant sous l'action de la vis de manoeuvre. La tête de vis est dimensionnée de manière à rester emprisonnée entre le fond de la rainure et l'embase du corps.Thus, the body is guided during its sliding in the groove, which ensures a precise radial direction of the axis of the screw and avoids seizures. In addition, the screw head is radially immobilized relative to the body, and the action of centrifugal forces on the element of when the screw is loosened partially, prevents the screw from turn, because the screw head is then in positive support against the base from the body. The body is placed between the feet of a pair of blades and has a section adapted to the section of said groove. It has a base lower located above the bottom of the groove and a radial opening through non-circular section in which the element of lock is slidably mounted under the action of the operating screw. The screw head is dimensioned so as to remain trapped between the bottom of the groove and the base of the body.
La section du corps dans un plan perpendiculaire à l'axe de la vis de manoeuvre est supérieure à la section de l'élément de verrouillage dans le même plan, et la section de la tête de vis est également supérieure à la section de l'élément de verrouillage afin que la face supérieure de la tête de vis puisse venir en appui sur l'embase du corps. Cette technologie n'est donc pas adaptée pour certains disques de turbine pour cause de manque de place entre les pieds de deux aubes consécutives.The body section in a plane perpendicular to the axis of the operating screw is greater than the section of the locking element in the same plane, and the section of the screw head is also greater than the section of the locking element so that the face top of the screw head can bear against the base of the body. This technology is therefore not suitable for certain turbine disks because of lack of space between the feet of two blades consecutive.
Le but de l'invention est de proposer une roue de turbomachine comportant un dispositif de blocage qui pallie cet inconvénient et qui puisse loger dans un espace circonférentiel réduit.The object of the invention is to propose a turbomachine wheel comprising a locking device which overcomes this disadvantage and which can be housed in a reduced circumferential space.
Ce but est réalisé selon l'invention par le fait que la tête de vis est retenue radialement vers l'extérieur par les deux pieds d'aube adjacents.This object is achieved according to the invention by the fact that the screw head is held radially outward by the two feet of dawn adjacent.
Ainsi, en cas de desserrage de la vis lors du fonctionnement, sous l'action des forces centrifuges, le déplacement vers l'extérieur de la vis est limité par le jeu entre le fond de la rainure et le dessous des pieds d'aube. Lorsque la tête de vis est en appui positif contre les pieds d'aube, les mêmes forces centrifuges agissant sur l'élément de verrouillage repoussent ce dernier vers l'extérieur, ce qui empêche un serrage plus grand de la vis et aurait même tendance à le faire tourner en sens inverse.Thus, in case of loosening of the screw during operation, under the action of centrifugal forces, the outward movement of the screw is limited by the play between the bottom of the groove and the underside of the feet blade. When the screw head is in positive support against the dawn feet, the same centrifugal forces acting on the locking element push the latter outward, which prevents more tightening large of the screw and would even tend to turn it in the opposite direction.
Selon un premier mode de réalisation simplifié, le diamètre de la tête de vis est supérieur à l'écartement entre les deux pieds d'aube adjacents. Le dispositif de blocage comporte alors deux pièces : l'élément de verrouillage et la vis de manoeuvre.According to a first simplified embodiment, the diameter of the screw head is greater than the distance between the two feet of dawn adjacent. The locking device then comprises two parts: the element lock and the maneuvering screw.
Selon un deuxième mode de réalisation de l'invention, une plaque intermédiaire est interposée entre la tête de vis et l'élément de verrouillage, les extrémités de ladite plaque étant disposées sous les deux pieds d'aube adjacent.According to a second embodiment of the invention, a intermediate plate is interposed between the screw head and the locking, the ends of said plate being arranged under both dawn feet adjacent.
Selon une autre caractéristique avantageuse de l'invention, la plaque comporte des moyens pour empêcher sa rotation par rapport à l'élément de verrouillage. Ces moyens sont constitués par exemple par des languettes radiales qui permettent la remontée de l'élément de verrouillage lors du montage.According to another advantageous characteristic of the invention, the plate has means for preventing its rotation relative to the locking element. These means consist for example of radial tabs that allow the rise of the element of lock during assembly.
Avantageusement, la plaque comporte également des moyens pour immobiliser en rotation la tête de vis. Ces moyens sont constitués de préférence par des languettes radiales appuyant sur des pans de la tête de vis. Ces languettes sont flexibles afin de permettre la rotation de la vis, lors du montage, au cours de la remontée de l'élément de verrouillage.Advantageously, the plate also comprises means to immobilize in rotation the screw head. These means consist of preferably by radial tabs pressing on the sides of the head quote. These tongues are flexible to allow rotation of the screw, during assembly, during the ascent of the locking element.
Selon une autre caractéristique de l'invention, l'élément de verrouillage présente une excroissance supérieure au voisinage de l'extrémité de la vis qui vient loger dans l'orifice ménagé dans les plates-formes des deux aubes adjacentes. Ce manchon sert de témoin visuel de remontée de l'élément de verrouillage.According to another characteristic of the invention, the element of locking has a greater protrusion in the vicinity of the end of the screw which is housed in the hole in the platforms two adjacent blades. This sleeve serves as a visual indicator of raising of the locking element.
D'autres avantages et caractéristiques de l'invention ressortiront à la lecture de la description suivante faite à titre d'exemple et en référence aux dessins annexés dans lesquels :
- la figure 1 est une vue de dessus d'une partie de disque de roue non équipée d'aubes ;
- la figure 2 est une vue de dessus d'une partie de disque de roue équipée d'aubes à attache marteau immobilisées par un dispositif de verrouillage conforme à l'invention ;
- la figure 3 est une coupe selon la ligne III-III de la figure 2 d'un dispositif de blocage selon un premier mode de réalisation de l'invention, cette coupe étant prise selon un plan radial passant par l'axe de la turbomachine, les aubes n'étant pas montrées par souci de clarté ;
- la figure 4 est une vue axiale du dispositif de blocage entre deux pieds d'aube selon le premier mode de réalisation ;
- la figure 5 concerne également le premier mode de réalisation selon la ligne III-III, l'élément de verrouillage n'étant pas encore remonté ;
- les figure 6, 7 et 8 sont semblables respectivement aux figures 3, 4 et 5 et concernent un deuxième mode de réalisation de l'invention ;
- la figure 9 est une vue développée de la plaque en tôle utilisée dans le deuxième mode de réalisation ;
- la figure 10 est une coupe de la plaque intermédiaire selon la ligne X-X de la figure 11 ;
- la figure 11 est une vue de dessus de la plaque intermédiaire ; et
- la figure 12 est une vue de dessus de l'élément de verrouillage selon le deuxième mode de réalisation de l'invention.
- Figure 1 is a top view of a wheel disc portion not equipped with blades;
- Figure 2 is a top view of a wheel disk portion equipped with hammer blade immobilized by a locking device according to the invention;
- FIG. 3 is a section along the line III-III of FIG. 2 of a locking device according to a first embodiment of the invention, this section being taken along a radial plane passing through the axis of the turbomachine, the blades are not shown for the sake of clarity;
- Figure 4 is an axial view of the locking device between two blade roots according to the first embodiment;
- Figure 5 also relates to the first embodiment according to line III-III, the locking element has not yet been reassembled;
- Figures 6, 7 and 8 are similar respectively to Figures 3, 4 and 5 and relate to a second embodiment of the invention;
- Figure 9 is a developed view of the sheet metal plate used in the second embodiment;
- Figure 10 is a section of the intermediate plate along line XX of Figure 11;
- Figure 11 is a top view of the intermediate plate; and
- Figure 12 is a top view of the locking element according to the second embodiment of the invention.
La figure 3 montre en coupe un disque 1 de roue de
turbomachine qui comporte à sa périphérie une rainure 2 destinée à
maintenir les pieds d'aube de type à attache marteau. Cette rainure 2,
délimitée par des parois latérales 3a et 3b de section curviligne, s'ouvre
vers l'extérieur par une gorge 4 qui a une dimension, dans le sens de l'axe
de rotation de la roue, inférieure à la dimension de la cavité 5 formée dans
le fond de la rainure 2. Les pieds des aubes ont une section selon le plan
radial passant par l'axe de rotation du disque 1 adaptée à la section de la
rainure 2 afin d'y être maintenus par coopération de forme.FIG. 3 shows in section a wheel disc 1 of
turbomachine which has at its periphery a
La figure 1 est une vue de dessus d'une partie du disque 1.
Comme on le voit sur cette figure 1, les parois latérales 3a et 3b
comportent en vis-à-vis une première paire d'échancrures radiales 6a et
6b qui constituent une fenêtre de chargement, permettant l'introduction
des pieds 7 des aubes 8 dans la rainure 2 lors du montage de ces aubes 8,
ainsi qu'une deuxième paire d'échancrures radiales 9a, 9b qui constituent
un logement pour le verrou d'un dispositif de verrouillage des aubes objet
de l'invention. La deuxième paire d'échancrures 9a, 9b est décalée
angulairement par rapport à la première paire d'échancrures 6a, 6b d'une
distance égale à l'angle formé par deux aubes consécutives ou à un
multiple de cet angle. Il est à noter que le même disque 1 de roue peut
comporter plusieurs dispositifs de verrouillage conformes à l'invention.Figure 1 is a top view of a portion of the disc 1.
As seen in this figure 1, the
La figure 2 montre la même partie de disque 1 équipée de ses
aubes 8. Chaque aube 8 comporte, entre son pied 7 et sa partie aérodynamique
10, une plate-forme 11 qui vient recouvrir la périphérie du disque
1, l'ensemble des plates-formes 11 des aubes 8 délimitant intérieurement
la veine du flux gazeux.Figure 2 shows the same part of disk 1 equipped with its
8. Each
Pour le montage des aubes 8 sur le disque 1, on procède de la
même manière. On introduit successivement le pied 7 de chaque aube 8
dans la rainure 2 par la fenêtre constituée par la première paire
d'échancrures 6a, 6b et on fait coulisser l'aube 8 dans le sens de la flèche
F jusqu'à ce que sa plate-forme 11 vienne buter contre la plate-forme de
l'aube précédemment introduite.For mounting the
Toutes les aubes 8 sont identiques à l'exception de l'avant-dernière
montée, référencée 8a, et de la dernière montée, référencée 8b,
qui présentent sur les bords adjacents de leurs plates-formes 11a et 11b
des encoches 12a et 12b qui constituent un orifice 13 dont la fonction sera
expliquée plus loin dans le présent mémoire.All the
Après l'introduction de l'avant-dernière aube 8a dans la
rainure 2, on introduit un dispositif de blocage 14 par la fenêtre de
chargement dans la rainure 2, puis on positionne le pied 7 de la dernière
aube dans la fenêtre de chargement entre la dernière aube montée 8a et
la première aube montée et on fait coulisser l'ensemble de toutes les
aubes 8 dans le sens et la flèche F, d'un angle correspondant à la demi-mesure
de l'angle entre deux aubes consécutives, de telle manière que les
plates-formes 11a et 11b de la première aube montée 8a et de la dernière
aube montée 8b soient jointives selon le plan médian et la fenêtre de
chargement constituée par la première paire d'échancrures 6a et 6b. Dans
cette position, le dispositif de blocage 14 disposé ente les pieds 7 des
aubes 8a et 8b se trouve en face de la deuxième paire d'échancrures 9a et
9b.After the introduction of
Les échancrures 9a et 9b ont des dimensions axiale et
périphérique inférieures à celles des échancrures 6a et 6b de la fenêtre de
chargement des aubes 8, pour éviter l'échappement des aubes 8
lorsqu'elles passent devant ces échancrures 9a et 9b.The
Il est à noter qu'il existe un jeu entre le dessous 15 des pieds 7
des aubes et le fond de la rainure 2.It should be noted that there is a game between the bottom 15
Les figures 3 à 5 montrent un premier mode de réalisation du
dispositif de blocage 14 qui est constitué de deux pièces, à savoir un
élément de verrouillage 16 et une vis de manoeuvre 17.Figures 3 to 5 show a first embodiment of the
L'élément de verrouillage 16 a une section, selon un plan radial
passant par l'axe de rotation du disque 1, qui est dessinée de telle
manière que l'élément de verrouillage 16 puisse coulisser dans la rainure 2
lors du montage. Il présente un taraudage radial équipé d'un filetage 31
destiné à coopérer avec le filetage du fût 40 de la vis de manoeuvre 17.
La vis de manoeuvre 17 comporte une tête de vis 41 de grande dimension
qui loge dans l'espace annulaire 21 délimité par le dessous 15 des pieds
d'aube 7 et le fond de la rainure 2. Le diamètre de cette tête 41 est
supérieure à la distance séparant les deux pieds d'aube 7a et 7b
adjacents, ainsi que cela se voit sur la figure 4. La partie périphérique de
la face supérieure 42 de la tête de vis 41 peut donc venir en appui contre
les dessous 15 de ces deux pieds d'aube 7a et 7b, ce qui limite le
déplacement radial possible de la tête de vis 41. L'extrémité 43 de la vis
de manoeuvre 17, opposée à la tête de vis, loge dans l'orifice 13 formé
par les encoches 12a et 12b des plates-formes 11a et 11b. Cette extrémité
43 est munie de moyens coopérant avec une clef de serrage du type
"Allen" par exemple, afin de pouvoir remonter l'élément de verrouillage 16
radialement vers l'extérieur lorsqu'il est positionné en face de la deuxième
paire d'échancrures 9a et 9b.The locking
La dimension circonférentielle des échancrures 9a et 9b est
avantageusement inférieure à la distance séparant les deux pieds d'aube
consécutifs 7a et 7b. La dimension circonférentielle de l'embase 23 de
l'élément de verrouillage 16 est sensiblement égale ou inférieure à la
distance séparant les deux pieds d'aube adjacents 7a et 7b, tandis que la
dimension circonférentielle de la partie supérieure de l'élément de
verrouillage est sensiblement égale à la dimension circonférentielle des
échancrures 9a et 9b, au moins dans les zones 22a, 22b qui doivent loger
dans ces échancrures 9a et 9b, après la remontée de l'élément de
verrouillage 16.The circumferential dimension of the
Ainsi que cela est montré sur la figure 5, les zones 22a et 22b
sont disposées dans la cavité 5 de la rainure 2, lorsque l'élément de
verrouillage est dans la position abaissée. Il en est de même de l'embase
23 de l'élément de verrouillage 16, dont la face inférieure 24 est alors à
peu de distance au-dessus de la face supérieure 42 de la tête de vis.As shown in FIG. 5, the
Lorsque l'élément de verrouillage 16 est remonté par rotation
de la vis de manoeuvre 17, ainsi que cela est montré sur la figure 3, la
face inférieure 24 de l'élément de verrouillage 16 est éloignée de la tête
de vis. Les parois latérales 25a et 25b de l'embase 23 sont alors en appui
contre les parois latérales 3a et 3b de la rainure 2 au voisinage des
échancrures 9a et 9b.When the locking
Lors du fonctionnement de la turbomachine, les forces
centrifuges exercées sur l'élément de verrouillage 16 ont tendance à
repousser ce dernier ainsi que la vis de manoeuvre vers l'extérieur. Les
parois latérales 25a et 25b de l'embase 23 sont alors en appui positif
contre les parois latérales 3a et 3b de la rainure 2, et en cas de
desserrage de la vis de manoeuvre 17, le déplacement de la tête de vis 41
sera limité, car la portion périphérique de la tête de vis 17 est retenue par
les pieds d'aube 7a et 7b adjacents. Lors de l'arrêt du disque 1, la tête de
vis 17 pourra reposer sur le fond de la rainure 2, mais les portions 22a et
22b de l'élément de verrouillage 16 resteront prisonnières dans les
échancrures 9a et 9b.During the operation of the turbomachine, the forces
centrifugal forces exerted on the locking
Les références 26a et 26b désignent des excroissances radiales,
parallèles à l'axe de la vis de manoeuvre 17, qui s'étendend radialement
vers l'extérieur au-dessus de la partie supérieure de l'élément de
verrouillage 16, et dont les sommets sont disposés dans l'orifice 13 des
plates-formes 11a et 11b, lorsque l'élément de verrouillage 16 est
remonté, afin de servir de témoin visuel de la bonne remontée de
l'élément de verrouillage 16, au cours du montage, ou au cours des visites
d'entretien.
Le premier mode de réalisation de l'invention décrit ci-dessus
nécessite que le diamètre de la tête de vis 41 soit supérieur à l'écartement
entre les deux pieds d'aube adjacents 7a et 7b. Ceci exige que la
dimension axiale du dessous 15 d'un pied d'aube soit supérieure à la
distance séparant les deux pieds d'aube adjacents 7a et 7b.The first embodiment of the invention described above
requires that the diameter of the
Les figure 6 à 12 montrent un deuxième mode de réalisation de l'invention qui peut s'appliquer à tout type de disque aubagé du type attache marteau.Figures 6 to 12 show a second embodiment of the invention which can be applied to any type of blisk of the type hammer attachment.
Dans le deuxième mode de réalisation de l'invention, l'élément
de verrouillage 16 est quasi-identique à celui décrit ci-dessus et ne sera
pas décrit davantage. Seules les variantes optionnelles seront décrites.In the second embodiment of the invention, the
La vis de manoeuvre 17, selon le deuxième mode de réalisation
de l'invention, présente une tête de vis 41, de faible diamètre et de
préférence non circulaire. Ce diamètre est par exemple inférieur à la
distance séparant les deux pieds d'aube adjacents 7a et 7b.The operating
Pour limiter le déplacement radial possible de la tête de vis 41,
une plaque intermédiaire 50 est interposée entre la tête de vis 41 et
l'élément de verrouillage 16. Cette plaque intermédiaire 50, qui a une
forme oblongue, présente un orifice central 51 traversé par le fût 40 de la
vis de manoeuvre 17, et sa dimension circonférentielle est telle que ses
extrémités 52a et 52b sont disposées sous les deux pieds d'aube
adjacents 7a et 7b.To limit the possible radial displacement of the
Ainsi, en cas de desserrage de la vis au cours du
fonctionnement de la turbomachine, la face supérieure 42 de la tête de vis
17 vient en appui sur la face inférieure de la plaque intermédiaire 50, dont
les extrémités 52a et 52b viennent en appui sur les dessous 15 des deux
pieds d'aube adjacents, ce qui limite le déplacement radial de la tête de
vis 41.Thus, in case of loosening of the screw during
operation of the turbomachine, the
Avantageusement, la plaque intermédiaire 50, qui est réalisée
de préférence à partir d'une tôle par découpe et pliage, et qui est montrée
en détail sur les figures 9 à 11, comporte deux languettes radiales 53a et
53b qui s'étendent vers l'extérieur et qui logent dans des rainures radiales
54a et 54b ménagées sur deux faces opposées de l'élément de
verrouillage 16, ainsi que cela est montré sur la figure 12. La coopération
des languettes 53a et 53b avec les rainures 54a et 54b empêche la plaque
intermédiaire 50 de tourner par rapport à l'élément de verrouillage 16,
tout en permettant le coulissement de l'élément de verrouillage 16 par
rapport à la plaque intermédiaire 50, lors de la remontée ou de la
descente de l'élément de verrouillage. Les rainures 54a et 54b sont
ménagées de préférence sur les face
s de l'élément de verrouilllage 16 qui sont en vis-à-vis des faces
adjacentes des deux pieds d'aube 7a et 7b.Advantageously, the
La plaque intermédiaire 50 comporte également et de
préférence deux languettes 55a et 55b élastiques qui s'étendent
radialement vers l'intérieur et qui sont destinées à empêcher le desserrage
de la vis de manoeuvre 17, la tête 41 de cette dernière comportant alors
des pans, au nombre de six par exemple, sur lesquels les languettes 55a
et 55b sont en appui.The
L'élasticité des languettes 55a et 55b est calculée de manière à
permettre la rotation de la tête de vis 17 lorsqu'on exerce un couple
prédéterminé sur l'extrémité 43 de la vis de manoeuvre 17, lors de la
montée ou de la descente de l'élément de verrouillage 16, et est suffisante
pour empêcher la rotation de la tête de vis 17 en l'absence de ce couple.The elasticity of the
La figure 9 montre le développé de la plaque intermédiaire 50,
avant le pliage des languettes 53a, 53b, 55a et 55b. On remarque que
l'orifice 51 n'est pas circulaire. FIG. 9 shows the development of the
Le centrage de la plaque intermédiaire 50 par rapport à la vis
de manoeuvre 17 est réalisé par la coopération des languettes 53a et 53b
avec les rainures 54a et 54b de l'élément de verrouillage 16. L'orifice 51
est toutefois dimensionné de telle manière que la tête de vis 41 soit en
appui contre la face inférieure 55 de la plaque intermédiaire 50.The centering of the
Il est à noter que l'élément de verrouillage 16 selon le premier
mode de réalisation de l'invention n'a pas besoin des rainures radiales 54a
et 54b décrites ci-dessus, qui servent à empêcher la rotation de la plaque
intermédiaire 50.It should be noted that the locking
Toutefois, le même type d'élément de verrouillage ayant des
rainures radiales 54a et 54b peut être utilisé dans les deux modes de
réalisation de l'invention. Seule la géométire de l'espace accueillant la tête
de vis 41 est à considérer pour faire le choix du mode de réalisation
préféré de l'invention.However, the same type of locking element having
Claims (9)
- Turbomachine wheel comprising a disc (1), blades (8) and a device (14) for immobilizing the blades, the said disc comprising a peripheral groove (2), the said blades comprising roots (7) of the hammerhead type which can be introduced into the said groove (2) through a loading window (6a, 6b) and held in the said groove (2) by collaboration of shape with the side walls (3a, 3b) of the latter, the said immobilizing device being able to be introduced into the said groove through the said loading window and comprising a locking element (16) arranged in a space separating two consecutive blade roots (7a, 7b) and able to be raised into a lock housing formed in the side walls of the said groove through the action of a radial operating screw (17), the head (41) of which rests against the bottom of the groove, a radial clearance being provided between the bottom of the groove (2) and the underside (15) of the blade roots, characterized in that the screw head (41) is retained radially outwardly by the two adjacent blade roots (7a, 7b).
- Turbomachine wheel according to Claim 1, characterized in that the diameter of the screw head (41) is greater than the separation between the said two blade roots (7a, 7b).
- Turbomachine wheel according to Claim 1, characterized in that an intermediate plate (50) is interposed between the screw head (17) and the locking element (16), the ends (52a, 52b) of the said plate (50) being arranged under the said two adjacent blade roots (7a, 7b).
- Turbomachine wheel according to Claim 3, characterized in that the plate (50) comprises means for preventing it from turning with respect to the locking element (16).
- Turbomachine wheel according to Claim 4, characterized in that the said means consist of radial tabs (53a, 53b).
- Turbomachine wheel according to any one of Claims 3 to 5, characterized in that the plate comprises means for stopping the screw head (41) from turning.
- Turbomachine wheel according to Claim 6, characterized in that the said means for stopping the screw head from turning comprise radial tabs (55a, 55b) bearing against flats of the screw head (41).
- Turbomachine wheel according to any one of Claims 3 to 7, characterized in that the said plate is made of sheet metal.
- Turbomachine wheel according to any one of Claims 1 to 8, characterized in that the locking element has at least one upper protuberance (26a, 26b) in the vicinity of the end of the screw, this protuberance becoming housed in an orifice (13) formed in the platforms (11a, 11b) of the two adjacent blades (8a, 8b) and serving as a visual indicator of the raising of the locking element (16).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0115095 | 2001-11-22 | ||
FR0115095A FR2832455B1 (en) | 2001-11-22 | 2001-11-22 | DEVICE FOR LOCKING BLADES IN A GROOVE OF A DISC |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1314856A1 EP1314856A1 (en) | 2003-05-28 |
EP1314856B1 true EP1314856B1 (en) | 2005-01-26 |
Family
ID=8869657
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02292896A Expired - Lifetime EP1314856B1 (en) | 2001-11-22 | 2002-11-22 | Device for locking blades in a disk groove |
Country Status (9)
Country | Link |
---|---|
US (1) | US6752598B2 (en) |
EP (1) | EP1314856B1 (en) |
JP (1) | JP4043922B2 (en) |
CA (1) | CA2411688C (en) |
DE (1) | DE60202738T2 (en) |
ES (1) | ES2233784T3 (en) |
FR (1) | FR2832455B1 (en) |
RU (1) | RU2239070C2 (en) |
UA (1) | UA73767C2 (en) |
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US7435055B2 (en) * | 2005-03-29 | 2008-10-14 | Siemens Power Generation, Inc. | Locking spacer assembly for a turbine engine |
FR2886336B1 (en) * | 2005-05-26 | 2007-08-24 | Snecma Moteurs Sa | IMPROVEMENT TO A ROTOR AUBAGEE WHEEL TO ENHANCE THE LOCKING OF AUBES |
US8206116B2 (en) * | 2005-07-14 | 2012-06-26 | United Technologies Corporation | Method for loading and locking tangential rotor blades and blade design |
EP1801355B1 (en) * | 2005-12-23 | 2015-02-11 | Techspace Aero | Device for locking the blades of a turbomachine disk |
US8608446B2 (en) * | 2006-06-05 | 2013-12-17 | United Technologies Corporation | Rotor disk and blade arrangement |
JP4886735B2 (en) * | 2008-05-26 | 2012-02-29 | 株式会社東芝 | Turbine blade assembly and steam turbine |
FR2940354B1 (en) * | 2008-12-23 | 2015-01-09 | Snecma | HAMMER ATTACHED AUB FIXING DEVICE AND ADAPTER COMPRESSOR DISK. |
US8182230B2 (en) * | 2009-01-21 | 2012-05-22 | Pratt & Whitney Canada Corp. | Fan blade preloading arrangement and method |
GB0908502D0 (en) * | 2009-05-19 | 2009-06-24 | Rolls Royce Plc | A balanced rotor for a turbine engine |
US8523529B2 (en) * | 2009-11-11 | 2013-09-03 | General Electric Company | Locking spacer assembly for a circumferential entry airfoil attachment system |
FR2964692B1 (en) * | 2010-09-13 | 2012-11-09 | Snecma | CIRCUMFERENTIAL BLOCKING DEVICE FOR BLADE HAMMER FOR TURBOMACHINE, WITH IMPROVED RADIAL DEPLOYMENT |
FR2965008B1 (en) * | 2010-09-16 | 2013-08-02 | Snecma | AUBES DISK FOR TURBOMACHINE ROTOR, AND TURBOMACHINE EQUIPPED WITH SUCH A DISK |
CH703997A1 (en) * | 2010-10-27 | 2012-04-30 | Alstom Technology Ltd | Blade assembly, in particular vane. |
JP5730085B2 (en) * | 2011-03-17 | 2015-06-03 | 三菱日立パワーシステムズ株式会社 | Rotor structure |
WO2012131227A1 (en) | 2011-03-21 | 2012-10-04 | Snecma | Device for locking blades in a groove of a turbomachine disc |
FR2973066B1 (en) * | 2011-03-21 | 2013-04-19 | Snecma | DEVICE FOR BLOCKING AUBES IN A GROOVE OF A TURBOMACHINE DISK |
FR2973068B1 (en) * | 2011-03-21 | 2013-04-19 | Snecma | DEVICE FOR BLOCKING AUBES IN A GROOVE OF A TURBOMACHINE DISK |
FR2973067B1 (en) * | 2011-03-21 | 2013-04-12 | Snecma | DEVICE FOR BLOCKING AUBES IN A GROOVE OF A TURBOMACHINE DISK |
US8932023B2 (en) * | 2012-01-13 | 2015-01-13 | General Electric Company | Rotor wheel for a turbomachine |
JP2013249756A (en) * | 2012-05-31 | 2013-12-12 | Hitachi Ltd | Compressor |
US20140286782A1 (en) * | 2012-08-07 | 2014-09-25 | Solar Turbines Incorporated | Turbine blade staking pin |
EP2719866B1 (en) * | 2012-10-12 | 2018-12-05 | Safran Aero Boosters SA | Rotor disk of a turbomachine comprising a lock for blades |
US9341071B2 (en) * | 2013-10-16 | 2016-05-17 | General Electric Company | Locking spacer assembly |
DE102013223583A1 (en) | 2013-11-19 | 2015-05-21 | MTU Aero Engines AG | Shovel-disc composite, method and turbomachine |
CN104481594A (en) * | 2014-10-28 | 2015-04-01 | 哈尔滨汽轮机厂有限责任公司 | Locking device used for circumferential compressor annular dovetail-shaped blade root of gas compressor |
DE102015203290A1 (en) * | 2015-02-24 | 2016-09-29 | MTU Aero Engines AG | Securing element and turbomachine |
CN105065065A (en) * | 2015-08-07 | 2015-11-18 | 山东青能动力股份有限公司 | Fir type blade root moving blade locking device and assembly process thereof |
GB2580977B (en) * | 2019-02-04 | 2021-02-10 | Rolls Royce Plc | Adapter for positioning a machining tool between two aerofoils |
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US3088708A (en) * | 1961-12-29 | 1963-05-07 | Seymour J Feinberg | Compressor blade locking device |
FR1402507A (en) * | 1963-10-24 | 1965-06-11 | Gen Electric | Locking device of the blades of a rotor |
FR2282038A1 (en) * | 1974-08-13 | 1976-03-12 | Mtu Muenchen Gmbh | DEVICE FOR FIXING THE MOBILE BLADES OF TURBOMACHINES |
GB2156908A (en) * | 1984-03-30 | 1985-10-16 | Rolls Royce | Bladed rotor assembly for gas turbine engine |
USH1258H (en) * | 1992-09-16 | 1993-12-07 | The United States Of America As Represented By The Secretary Of The Air Force | Blade lock screw |
FR2810366B1 (en) * | 2000-06-15 | 2002-10-11 | Snecma Moteurs | DEVICE FOR LOCKING BLADES WITH HAMMER FASTENERS ON A DISC |
-
2001
- 2001-11-22 FR FR0115095A patent/FR2832455B1/en not_active Expired - Fee Related
-
2002
- 2002-11-13 CA CA2411688A patent/CA2411688C/en not_active Expired - Fee Related
- 2002-11-21 RU RU2002131463/06A patent/RU2239070C2/en not_active IP Right Cessation
- 2002-11-21 US US10/300,815 patent/US6752598B2/en not_active Expired - Lifetime
- 2002-11-21 UA UA2002119287A patent/UA73767C2/en unknown
- 2002-11-21 JP JP2002337524A patent/JP4043922B2/en not_active Expired - Fee Related
- 2002-11-22 ES ES02292896T patent/ES2233784T3/en not_active Expired - Lifetime
- 2002-11-22 EP EP02292896A patent/EP1314856B1/en not_active Expired - Lifetime
- 2002-11-22 DE DE60202738T patent/DE60202738T2/en not_active Expired - Lifetime
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JP4043922B2 (en) | 2008-02-06 |
EP1314856A1 (en) | 2003-05-28 |
UA73767C2 (en) | 2005-09-15 |
FR2832455A1 (en) | 2003-05-23 |
JP2003193801A (en) | 2003-07-09 |
ES2233784T3 (en) | 2005-06-16 |
DE60202738T2 (en) | 2006-03-30 |
RU2239070C2 (en) | 2004-10-27 |
DE60202738D1 (en) | 2005-03-03 |
US20030123986A1 (en) | 2003-07-03 |
CA2411688C (en) | 2010-04-27 |
US6752598B2 (en) | 2004-06-22 |
FR2832455B1 (en) | 2004-04-02 |
CA2411688A1 (en) | 2003-05-22 |
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