FR2487459A1 - Ball or roller bearing - has teeth on faces of inner race for coupling with adjacent bearing - Google Patents
Ball or roller bearing - has teeth on faces of inner race for coupling with adjacent bearing Download PDFInfo
- Publication number
- FR2487459A1 FR2487459A1 FR8016183A FR8016183A FR2487459A1 FR 2487459 A1 FR2487459 A1 FR 2487459A1 FR 8016183 A FR8016183 A FR 8016183A FR 8016183 A FR8016183 A FR 8016183A FR 2487459 A1 FR2487459 A1 FR 2487459A1
- Authority
- FR
- France
- Prior art keywords
- bearing
- teeth
- front face
- bearings
- rotating
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
- F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
- F16C35/063—Fixing them on the shaft
- F16C35/0635—Fixing them on the shaft the bore of the inner ring being of special non-cylindrical shape which co-operates with a complementary shape on the shaft, e.g. teeth, polygonal sections
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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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/583—Details of specific parts of races
- F16C33/586—Details of specific parts of races outside the space between the races, e.g. end faces or bore of inner ring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
- F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2360/00—Engines or pumps
- F16C2360/23—Gas turbine engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C25/00—Bearings for exclusively rotary movement adjustable for wear or play
- F16C25/06—Ball or roller bearings
- F16C25/08—Ball or roller bearings self-adjusting
- F16C25/083—Ball or roller bearings self-adjusting with resilient means acting axially on a race ring to preload the bearing
Abstract
Description
RCULEENT ET APPLICATION AUX ENSEXRLES TOURNANTS,
NOTASSENT A GRANDE VITESSE DE ROTATION
L'invention concerne un roulement et son application aux ensembles tournants, en particulier ensemble tournant à grande vitesse de rotation, tels que rotors de turbine à gaz.RULE AND APPLICATION TO ROTATING ENSEXRLES,
NOTASSENT AT HIGH ROTATION SPEED
The invention relates to a bearing and its application to rotary assemblies, in particular assembly rotating at high speed of rotation, such as gas turbine rotors.
On sait que, lorsque la vitesse de rotation d'un ensemble tournant est élevée, un défaut de centrage des parties tournantes entraine des vibrations importantes, cause de détériorations rapides. C'est le cas notamment des rotors de turbines dont le centrage et sa conservation dans le temps doivent être effectifs, afin d'éviter tout balourd générateur de vibrations. It is known that, when the speed of rotation of a rotating assembly is high, a defect in the centering of the rotating parts causes significant vibrations, causing rapid deterioration. This is the case in particular of turbine rotors whose centering and its conservation over time must be effective, in order to avoid any imbalance generating vibrations.
Les solutions connues pour résoudre ce problème sont onéreuses, car il faut faire appel à des systèmes mécaniques utilisant des pièces auxiliaires dont la précision d'usinage requise élève le coût de la turbine d'une manière non négligeable et nuit au caractère interchangeable et démontable de l'ensemble, caractère souhaitable pour la maintenance. The known solutions to solve this problem are expensive, because it is necessary to call upon mechanical systems using auxiliary parts whose required machining precision raises the cost of the turbine in a non-negligible way and harms the interchangeable and removable character of overall, desirable for maintenance.
Un exemple de cet art antérieur est représenté schématiquement à la figure 1 sur laquelle un arbre (1) est soutenu par des roulements (2)et(3). Pour les besoins du centrage, un élément rectifié de l'arbre est introduit dans l'alésage de la bague intérieure de chaque roulement ; compte-tenu de la dispersion des c8tes d'alésage de chaque roulement et de rectification de l'arbre, il existe toujours des risques de jeu variable entre'les deux et, par conséquent, des risques de centrage défectueux et évolutif sous l'action d'efforts de fis xion se développant au cours du fonctionnement, défauts entrat- nant un balourd par rapport àl'axe géométriquede rotation. An example of this prior art is shown schematically in Figure 1 in which a shaft (1) is supported by bearings (2) and (3). For centering purposes, a rectified element of the shaft is introduced into the bore of the inner ring of each bearing; taking into account the dispersion of the bore dimensions of each bearing and of the shaft rectification, there are always risks of variable play between the two and, consequently, risks of defective centering and evolving under the action fis xion forces developing during operation, faults causing an imbalance with respect to the geometric axis of rotation.
Par ailleurs, on connaît un système d'accouplement constitué par deux couronnes frontales en regard, qui sont munies de dents à courbure concave ou convexe, conjuguées. L'avantage de ce type d'accouplement réside dans le fait qu'il assure à la fois ltentrainement et l'alignement des pièces accouplées, sans jeu diamétral. Cependant, un tel système, s'il assure l'alignement sans jeu de ces pièces, ne permet pas de réscudre le problème du centrage d'un rotor par rapport à ses roulements. Furthermore, there is known a coupling system constituted by two facing frontal rings, which are provided with teeth with concave or convex curvature, conjugate. The advantage of this type of coupling lies in the fact that it ensures both the drive and the alignment of the coupled parts, without diametrical play. However, such a system, if it ensures the alignment without play of these parts, does not resolve the problem of centering a rotor relative to its bearings.
La présente invention se propose de remédier aux inconvénients sus-évoqués des systèmes de centrage d'ensembles tournantes, notamment à grande vitesse de rotation. The present invention proposes to remedy the aforementioned drawbacks of centering systems of rotating assemblies, in particular at high speed of rotation.
Un objectif de l'invention est en particulier d'apporter une solution simple et économique au problème de centrage, sans jeu diamétral, des rotors de machine tournante par rapport aux roulements. An objective of the invention is in particular to provide a simple and economical solution to the problem of centering, without diametral play, of the rotors of a rotary machine with respect to the bearings.
L'invention se propose également d'appliquer ces solutions au domaine des turbines. The invention also proposes to apply these solutions to the field of turbines.
A cet effet, le roulement visé par la présente invention est du type comprenant une bague inté rieur, une bague extérieure et des billes,rouleaux, aiguilles, galets, etc... situés entre les bagues ; selon l'invention, au moins une face frontale d'au moins une des bagues du roulement est munie de dents radiales dont les flancs présentent une courbure concave ou convexe. To this end, the bearing targeted by the present invention is of the type comprising an inner ring, an outer ring and balls, rollers, needles, rollers, etc. situated between the rings; according to the invention, at least one front face of at least one of the rings of the bearing is provided with radial teeth whose sides have a concave or convex curvature.
Dans la majorité des applications, lesdites dents sont disposées sur la ou les faces frontales de la bague intérieure du roulement ; généralement, les deux faces frontales de cette bague sont pourvues desdites dents, de façon à assurer, d'une part, un centrage du roulement sur l'arbre de rotation grâce à un contact frontal d'une butée frontale annulaire dudit arbre sur une des faces frontales du roulement, d'autre part, un centrage d'une pièce tournante (par exemple roue de turbine ou de compresseur) par rapport au roulement grâce à un contact de l'autre face frontale du roulement avec une face frontale annulaire prévue sur ladite pièce tournante. In the majority of applications, said teeth are arranged on the front face or faces of the inner ring of the bearing; generally, the two end faces of this ring are provided with said teeth, so as to ensure, on the one hand, a centering of the bearing on the rotation shaft thanks to a front contact of an annular front stop of said shaft on one of the front faces of the bearing, on the other hand, centering of a rotating part (for example turbine or compressor wheel) relative to the bearing by contacting the other front face of the bearing with an annular front face provided on said rotating part.
La butée frontale de l'arbre et la face frontale de la pièce tournante sont munies de dents radiales à courbure convexe ou concave, conjuguées de celles du roulement avec lesquelles elle sont maintenues en prise par une pression parallèle à l'axe de rotation, développée par tout moyen approprié. Bien entendu, l'invention peut être appliquée à tout type de roulement, qu'il soit à billes, à rouleaux, à aiguilles, à contact oblique à butée, à gorge profonde, etc... The front stop of the shaft and the front face of the rotating part are provided with radial teeth with convex or concave curvature, combined with those of the bearing with which they are held in engagement by a pressure parallel to the axis of rotation, developed by any appropriate means. Of course, the invention can be applied to any type of bearing, whether it be ball, roller, needle, oblique contact with stop, deep groove, etc.
Selon une autre caractéristique de l'in invention, la courbure radiale des dents des roulements et des pièces en regard est circulaire, ce qui facilite la fabrication par fraisage ou par meulage de celles-ci. According to another characteristic of the invention, the radial curvature of the teeth of the bearings and facing parts is circular, which facilitates the manufacture by milling or by grinding thereof.
L'invention est en particulier applicable dans le domaine des turbines oU le centrage des rotors turbine au moyen de roulements conformes à l'invention diminue considérablement le poids et le coût de la machine. The invention is particularly applicable in the field of turbines where the centering of the turbine rotors by means of bearings according to the invention considerably reduces the weight and the cost of the machine.
Sur les dessins annexés sont représentés, à titre d'exemples non limitatifs, une forme d'exécution de l'objet de l'invention et une application de celle- ci ; sur ces dessins
la figure 1 déjà commentée est une coupe d'une turbine suivant l'état connu de la technique,
la figure 2 représente une vue en perspective d'un roulement conforme à l'invention,
la figure 3 est une vue partielle de ce roulement,
la figure 4 est une vue en coupe simplifiée d'une turbine munie de roulements conformes à l'invention,
la figure 5 est une vue partielle montrant les dents de la roue de turbine qui coopèrent avec celles de la face frontale d'un des roulements de l'invention.In the accompanying drawings are shown, by way of non-limiting examples, an embodiment of the subject of the invention and an application thereof; on these drawings
FIG. 1 already commented on is a section of a turbine according to the known state of the art,
FIG. 2 represents a perspective view of a bearing according to the invention,
FIG. 3 is a partial view of this bearing,
FIG. 4 is a simplified sectional view of a turbine fitted with bearings according to the invention,
FIG. 5 is a partial view showing the teeth of the turbine wheel which cooperate with those of the front face of one of the bearings of the invention.
Le roulement représenté à titre d'exemple aux figures 2 et 3 comprend une bague intérieure 13, une bague extérieure 14 et des billes 15. Les faces frontales 16 et 17 de la bague intérieure 13 sont munies de dents radiales telles que 18 dont les deux flancs 18a et 18b présentent une courbure convexe de profil circulaire. The bearing shown by way of example in FIGS. 2 and 3 comprises an inner ring 13, an outer ring 14 and balls 15. The front faces 16 and 17 of the inner ring 13 are provided with radial teeth such as 18, both of which sides 18a and 18b have a convex curvature of circular profile.
La nature convexe de cette courbure a été choisie à titre d'exemple non limitatif, cette courbure pouvant être concave. Les dents 18 peuvent être en saillie par rapport aux plans contenant les faces frontales de l'autre bague 4 du roulement ; elles peuvent également affleurer ces plans ou n'en saillir que partiellement.The convex nature of this curvature has been chosen by way of nonlimiting example, this curvature being able to be concave. The teeth 18 may project from the planes containing the front faces of the other ring 4 of the bearing; they can also be flush with these planes or protrude only partially.
La figure 4 représente l'application de ce roulement à une turbine comprenant un arbre creux 19 disposé entre deux roulements 20 et 21 conforme à l'invention. Les faces frontales 22, 23, 24 et 25 des bagues intérieures de ces roulements sont munies de dents radiales telles que décrites plus haut. En regard des faces 23 et 24, l'arbre 19 forme des butées frontales, constituées en l'exemple par ses chants annulaires d'extrémité, qui sont munies de dents radiales à courbure concave, conjuguées de celles des roulements et en prise avec celles-ci. Figure 4 shows the application of this bearing to a turbine comprising a hollow shaft 19 disposed between two bearings 20 and 21 according to the invention. The front faces 22, 23, 24 and 25 of the inner rings of these bearings are provided with radial teeth as described above. Opposite the faces 23 and 24, the shaft 19 forms front stops, constituted in the example by its annular end edges, which are provided with radial teeth with concave curvature, combined with those of the bearings and engaged with those -this.
De même, comme on peut le voir sur la figure 5 qui montre en vue frontale la roue de turbine 27, cette dernière est munie de dents radiales 26 à courbure concave, conjuguées des dents de la face 22 de la bague intérieure du roulement 20 ; de façon analogue, la roue de compresseur 28 possède une face frontale 29 munie de dents radiales à courbure concave, conjuguées des dents de la face 25 de la bague intérieure du roulement 21. En llexem- ple, le tout est maintenu axialement par un tirant 30 vissé dans la roue 25. Likewise, as can be seen in FIG. 5 which shows in front view the turbine wheel 27, the latter is provided with radial teeth 26 with concave curvature, combined with the teeth of the face 22 of the inner ring of the bearing 20; similarly, the compressor wheel 28 has a front face 29 provided with radial teeth with concave curvature, conjugate teeth on the face 25 of the inner ring of the bearing 21. In general, the whole is held axially by a tie rod 30 screwed into the wheel 25.
Les dents de chaque roulement en prise avec celas des pièces tournantes en regard développent des forces d'encastrement radiales qui assurent un centrage automatique relatif desdits roulements et desdites pièces. The teeth of each bearing engaged with the facing rotating parts develop radial embedding forces which ensure relative automatic centering of said bearings and said parts.
Les roulements 2C et 21 se trouvent ainsi automatiquement centrés par rapport à l'arbre tournant 19, cependant que les roue- de turbine 25 et roue de compresseur 27 se trouvent à leur tour automatiquement centrées par rapport aux roulements. On assure de la sorte un centrage automatique de l'ensemble tournant avec une économie importante, en poids et en coût, par rapport aux dispositifs connus.The bearings 2C and 21 are thus automatically centered relative to the rotating shaft 19, while the turbine wheel 25 and compressor wheel 27 are in turn automatically centered relative to the bearings. This ensures automatic centering of the rotating assembly with a significant saving in weight and cost, compared to known devices.
Il est à noter que, dans l'invention, la bague intérieure de chaque roulement ne repose plus sur l'arbre tournant, par sa face cylindrique interne comme c'est le cas dans les montages classiques (fig. 1) ; dans ces conditions, l'arbre tournant peut s'étendre uniquement d'une face frontale (23) dgun roulement à la face frontale en regard (24) de l'autre, comme le montre la figure 4 : les butées frontales munies de dents dudit arbre sont alors cons titubées par les chants annulaire d'extrémité de celui-ci l'arbre peut également se prolonger à l'intérieur des rou lements sans contact avec la face cylindrique interne de ceux-ci, les butées frontales munies de dents étant alors constituées parades épaulements ménagés sur ledit arbre. It should be noted that, in the invention, the inner ring of each bearing no longer rests on the rotating shaft, by its internal cylindrical face as is the case in conventional assemblies (fig. 1); under these conditions, the rotating shaft can extend only from one end face (23) with one bearing to the opposite face face (24) of the other, as shown in FIG. 4: the end stops provided with teeth of said shaft are then staggered by the annular end edges thereof, the shaft may also extend inside the bearings without contact with the internal cylindrical face of these, the front stops provided with teeth being then formed by shoulder displays arranged on said shaft.
Dans tous les cas, le contact et le centrage sont réalisés au niveau des faces frontales, munies de dents radiales. In all cases, contact and centering are carried out at the front faces, provided with radial teeth.
Bien qu'ayant décrit un mode de réalisation dans lequel les dents radiales sont disposées sur les faces frontales de la bague intérieure du roulement, il convient de noter que l'invention s'étend à des roulements pourvus de dents radiales sur les faces frontales de leur bague extérieure. Although having described an embodiment in which the radial teeth are arranged on the front faces of the inner ring of the bearing, it should be noted that the invention extends to bearings provided with radial teeth on the front faces of their outer ring.
D'une façon générale, Invention n'est pas limitée aux termes de la description qui précède, mais en comprend toutes les variantes. In general, the invention is not limited to the terms of the foregoing description, but includes all variants thereof.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8016183A FR2487459A1 (en) | 1980-07-22 | 1980-07-22 | Ball or roller bearing - has teeth on faces of inner race for coupling with adjacent bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8016183A FR2487459A1 (en) | 1980-07-22 | 1980-07-22 | Ball or roller bearing - has teeth on faces of inner race for coupling with adjacent bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2487459A1 true FR2487459A1 (en) | 1982-01-29 |
| FR2487459B1 FR2487459B1 (en) | 1984-06-15 |
Family
ID=9244422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8016183A Granted FR2487459A1 (en) | 1980-07-22 | 1980-07-22 | Ball or roller bearing - has teeth on faces of inner race for coupling with adjacent bearing |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2487459A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002002958A1 (en) * | 2000-07-04 | 2002-01-10 | Ina-Schaeffler Kg | Device for fixing the outer ring, especially the bushing, of a roller bearing, in place |
| WO2002035681A2 (en) * | 2000-10-26 | 2002-05-02 | Robert Bosch Gmbh | Armature |
| ITMI20110001A1 (en) * | 2011-01-04 | 2012-07-05 | Exergy Orc S R L | EXPANSION TURBINE |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR883706A (en) * | 1941-07-05 | 1943-07-13 | B H F Porsche K G Dr Ing | Coupling device for shafts, wheels and the like, comprising cylindrical teeth |
-
1980
- 1980-07-22 FR FR8016183A patent/FR2487459A1/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR883706A (en) * | 1941-07-05 | 1943-07-13 | B H F Porsche K G Dr Ing | Coupling device for shafts, wheels and the like, comprising cylindrical teeth |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002002958A1 (en) * | 2000-07-04 | 2002-01-10 | Ina-Schaeffler Kg | Device for fixing the outer ring, especially the bushing, of a roller bearing, in place |
| WO2002035681A2 (en) * | 2000-10-26 | 2002-05-02 | Robert Bosch Gmbh | Armature |
| WO2002035681A3 (en) * | 2000-10-26 | 2002-08-08 | Bosch Gmbh Robert | Armature |
| ITMI20110001A1 (en) * | 2011-01-04 | 2012-07-05 | Exergy Orc S R L | EXPANSION TURBINE |
| WO2012093299A1 (en) | 2011-01-04 | 2012-07-12 | Exergy Orc S.R.L. | Expansion turbine |
| US9429040B2 (en) | 2011-01-04 | 2016-08-30 | Exergy S.P.A. | Expansion turbine |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2487459B1 (en) | 1984-06-15 |
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| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |