EP0703366B1 - Rotating machine with axial thrust - Google Patents

Rotating machine with axial thrust Download PDF

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Publication number
EP0703366B1
EP0703366B1 EP95402111A EP95402111A EP0703366B1 EP 0703366 B1 EP0703366 B1 EP 0703366B1 EP 95402111 A EP95402111 A EP 95402111A EP 95402111 A EP95402111 A EP 95402111A EP 0703366 B1 EP0703366 B1 EP 0703366B1
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EP
European Patent Office
Prior art keywords
rotor
shaft
bearing
connection base
work
Prior art date
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Expired - Lifetime
Application number
EP95402111A
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German (de)
French (fr)
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EP0703366A1 (en
Inventor
Daniel Bolusset
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Areva NP SAS
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Framatome SA
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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
    • F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
    • F01D25/166—Sliding contact bearing
    • F01D25/168—Sliding contact bearing for axial load mainly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/051—Axial thrust balancing
    • F04D29/0513—Axial thrust balancing hydrostatic; hydrodynamic thrust bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/053—Shafts
    • F04D29/054—Arrangements for joining or assembling shafts

Definitions

  • the shafts of turbine engine rotors such as gas or steam turbines and centrifugal compressors or axial ones carry working elements such as wheels paddle. These organs ensure a transformation between a thermal energy present in a workplace typically gaseous and mechanical energy present on the rotor shaft.
  • the rotor of such a machine is held in position radial by bearings and in axial position by a stop. Its connection in rotation with other rotating elements of the machine is ensured by a coupling system transmitting a couple of work.
  • An object of the present invention is to give a possibility to raise the value of these speeds critical, and therefore more easily ensure a high performance operation.
  • the rotor working members ensuring the compression are impellers.
  • the tree that carries them is supported by bearings which provide the dynamic stiffness and damping characteristics necessary to ensure its stability in rotation.
  • bearings Two types bearings are used: hydrodynamic bearings with oil and active magnetic bearings.
  • Compressed gases are often dangerous and must be confined within the compressor casing. To do this, a seal is interposed at each crossing of this envelope by the tree. Many types can be used depending on the applications: oil, mechanical oil seals and now, dry fillings.
  • the axial thrust generated by the compression is, in part, compensated by a balancing piston; the thrust residual is balanced by that of an axial stop, i.e. with pads lubricated with oil, either magnetic.
  • the present invention also aims to allow simply and inexpensively produce a rotor capable of experience significant axial thrusts while turning high speed and transmitting large torques.
  • this invention provides a at least partial integration of rotor parts ensuring the function of an axial stop and that of a coupling plate transmitting the working torque. This integration makes it possible to reduce the door masses to false which, by their gyroscopic effects in particular, affect the dynamic stability of the rotor and thus reduce the range of machine rotational speeds.
  • Figure 1 shows a view in half axial section of a known compressor.
  • Figure 2 shows a view in half axial section of a compressor according to this invention.
  • the rotary stop and the coupling wall typically have the respective shapes of a stop and a coupling plate. Their bases of connection are mounted outside the segment of work to limit the range of the tree and the masses supported by it between the bearings. Landing 62 or 12 closest to the coupling plate will be said below "front landing”.
  • the torque balancing device transmits the torque from work on the coupling plate via a flexible coupling system 87 or 37 allowing rotational edgings between the rotor shaft and that of the torque balancing member while decoupling the bending vibrations of the two shafts.
  • the thrust disc 82 is mounted near the rear bearing 60 to limit the length of the tree overhang beyond the front landing.
  • connection bases axial stop and coupling are one and the same connection base 30.
  • the axial stop rotor assemblies and coupling consist of one and the same transmission part 30, 32, 34 comprising the base of connection 30.
  • This base is connected to the inner edge a transmission disc 32, 34 of annular shape.
  • a central part 34 of this transmission disc constitutes the coupling wall, a peripheral part 32 of this transmission disc constituting the rotary stop.
  • connection base could be mounted around the tree.
  • the shaft 16 is hollow at least near its end front 17 and the connection base 30 is fixed against the inner surface of this tree in the vicinity of this end.
  • the rotary stop 32 and the coupling wall extend radially and are then located axially in front of this front end.
  • the bearing surface on the base shaft connection 30 can be conical, as shown, or cylindrical. It is mounted by hydraulic fitting or hot, practically within the bearing range before.
  • connection base 30 It is locked axially by an axial screw 46 extending into the connection base 30 and screwing in an internal shoulder 48 of the shaft 6. Wedges of setting 47 allow precise positioning longitudinal of the connection base 30.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

Les arbres des rotors de turbomachines telles que les turbines à gaz ou à vapeur et les compresseurs centrifuges ou axiaux portent des organes de travail tels que des roues à aubes. Ces organes assurent une transformation entre une énergie thermique présente dans un milieu de travail typiquement gazeux et une énergie mécanique présente sur l'arbre du rotor.The shafts of turbine engine rotors such as gas or steam turbines and centrifugal compressors or axial ones carry working elements such as wheels paddle. These organs ensure a transformation between a thermal energy present in a workplace typically gaseous and mechanical energy present on the rotor shaft.

Le rotor d'une telle machine est maintenu en position radiale par des paliers et en position axiale par une butée. Sa liaison en rotation avec d'autres éléments tournants de la machine est assurée par un système d'accouplement transmettant un couple de travail.The rotor of such a machine is held in position radial by bearings and in axial position by a stop. Its connection in rotation with other rotating elements of the machine is ensured by a coupling system transmitting a couple of work.

Dans le cas de machines industrielles comme celles utilisées dans l'industrie du gaz ou du pétrole, on assiste à une augmentation des puissances spécifiques et des performances. Cette augmentation est liée à celle des vitesses de rotation qui atteignent plusieurs dizaines de milliers de tr/mn. Cette augmentation des vitesses de rotation se heurte au problème des vitesses critiques à traverser qui doivent rester en nombre limité pour assurer l'intégrité du rotor. Un but de la présente invention est de donner une possibilité d'élever la valeur de ces vitesses critiques, et par conséquent, d'assurer plus facilement un fonctionnement à performance élevée.In the case of industrial machines like those used in the gas or petroleum industry, we are witnessing to an increase in specific powers and performances. This increase is linked to that of rotational speeds which reach several tens of thousands of rpm. This increase in the speed of rotation faces the problem of critical speeds at cross which must remain limited in number to ensure rotor integrity. An object of the present invention is to give a possibility to raise the value of these speeds critical, and therefore more easily ensure a high performance operation.

Dans le cas par exemple d'un compresseur centrifuge multiétage les organes de travail rotoriques assurant la compression sont des roues à aubes. L'arbre qui les porte est supporté par des paliers qui apportent les caractéristiques dynamiques de raideur et d'amortissement nécessaires à assurer sa stabilité en rotation. Deux types de paliers sont utilisés : les paliers hydrodynamiques à huile et les paliers magnétiques actifs.In the case for example of a centrifugal compressor multi-stage the rotor working members ensuring the compression are impellers. The tree that carries them is supported by bearings which provide the dynamic stiffness and damping characteristics necessary to ensure its stability in rotation. Two types bearings are used: hydrodynamic bearings with oil and active magnetic bearings.

Les gaz comprimés sont souvent dangereux et doivent être confinés à l'intérieur de l'enveloppe du compresseur. Pour ce faire, une garniture d'étanchéité est interposée à chaque traversée de cette enveloppe par l'arbre. Plusieurs types sont utilisables suivant les applications : bagues à huile, garnitures mécaniques à huile et maintenant, garnitures sèches.Compressed gases are often dangerous and must be confined within the compressor casing. To do this, a seal is interposed at each crossing of this envelope by the tree. Many types can be used depending on the applications: oil, mechanical oil seals and now, dry fillings.

La poussée axiale engendrée par la compression est, en partie, compensée par un piston d'équilibrage ; la poussée résiduelle est équilibrée par celle d'une butée axiale, soit à patins lubrifiés à l'huile, soit magnétique.The axial thrust generated by the compression is, in part, compensated by a balancing piston; the thrust residual is balanced by that of an axial stop, i.e. with pads lubricated with oil, either magnetic.

Il est à noter que, bien qu'apportant des avantages indéniables par ailleurs, les composants "secs" (garnitures sèches et paliers magnétiques) apparus récemment sur le marché conduisent à réaliser des rotors plus longs et plus flexibles que précédemment et ayant une masse et un encombrement plus importants.It should be noted that, although it brings advantages undeniable, moreover, the "dry" components (linings dry and magnetic bearings) recently appeared on the market lead to longer and longer rotors flexible than before and having a mass and a larger dimensions.

Dans le cas notamment d'une utilisation de ces composants secs, l'accroissement de la vitesse de rotation peut être autorisé par une augmentation de la rigidité globale du rotor par rapport à sa masse. Un moyen bien connu pour atteindre cet objectif consiste à utiliser un arbre de rotor de plus grand diamètre. Mais ce moyen apparaít de manière générale comme coûteux.In the case in particular of a use of these dry components, increased rotational speed may be permitted by increased rigidity overall of the rotor relative to its mass. A well-known means to achieve this goal is to use a tree of larger diameter rotor. But this means appears to generally as expensive.

La présente invention a aussi pour but de permettre de réaliser de manière simple et peu coûteuse un rotor apte à subir des poussées axiales importantes tout en tournant à grande vitesse et en transmettant des couples importants.The present invention also aims to allow simply and inexpensively produce a rotor capable of experience significant axial thrusts while turning high speed and transmitting large torques.

Elle a pour objet une machine rotative à poussée axiale, présentant les caractéristiques de la revendication 1.Its object is a rotary push machine axial, having the features of claim 1.

Il apparaít que cette invention propose une intégration au moins partielle des pièces rotoriques assurant la fonction d'une butée axiale et celle d'un plateau d'accouplement transmettant le couple de travail. Cette intégration permet de diminuer les masses en porte à faux qui, par leurs effets gyroscopiques notamment, affectent la stabilité dynamique du rotor et réduisent ainsi la plage des vitesses de rotation de la machine.It appears that this invention provides a at least partial integration of rotor parts ensuring the function of an axial stop and that of a coupling plate transmitting the working torque. This integration makes it possible to reduce the door masses to false which, by their gyroscopic effects in particular, affect the dynamic stability of the rotor and thus reduce the range of machine rotational speeds.

A l'aide des figures schématiques ci-jointes, on va décrire plus particulièrement ci-après, à titre d'exemple non limitatif, comment la présente invention peut être mise en oeuvre.Using the attached schematic figures, we will describe more particularly below, by way of example non-limiting, how the present invention can be implemented in action.

La figure 1 représente une vue en demie coupe axiale d'un compresseur connu.Figure 1 shows a view in half axial section of a known compressor.

La figure 2 représente une vue en demie coupe axiale d'un compresseur selon cette invention.Figure 2 shows a view in half axial section of a compressor according to this invention.

On va tout d'abord décrire des dispositions qui sont communes à ces deux compresseurs, ceci en se référant à ces deux figures à la fois, les éléments portant des numéros de référence supérieurs à 50 appartenant au compresseur connu de la figure 1, ceux portant des numéros de référence inférieurs à 50 appartenant au compresseur de la figure 2 réalisé selon cette invention. De manière générale, lorsque deux éléments de ces deux compresseurs assurent la même fonction, leurs numéros de référence présentent une différence égale à 50.We will first describe provisions which are common to these two compressors, this with reference to these two figures at the same time, the elements bearing numbers of reference greater than 50 belonging to the known compressor of figure 1, those bearing reference numbers lower than 50 belonging to the compressor of figure 2 made according to this invention. Generally, when two elements of these two compressors ensure the same function, their reference numbers have a difference equal to 50.

Selon ces dispositions communes chacun de ces compresseurs comporte les éléments essentiels suivants :

  • Un stator 52 ou 2.
  • Un rotor 54 ou 4 tournant autour d'un axe sensiblement horizontal 56 ou 6 pour effectuer, sur un milieu de travail fluide, un travail tel que ce rotor reçoit de ce milieu à la fois un couple et une poussée axiale. Dans le cas du rotor d'un compresseur centrifuge multiétage agissant sur un milieu de travail gazeux le couple reçu de ce milieu est un couple résistant. Mais un tel couple peut aussi être moteur, par exemple dans le cas du rotor d'une turbine à gaz.
  • Enfin un organe d'équilibrage de couple 58 ou 8 tournant comme ce rotor et lui appliquant un couple de travail équilibrant le couple que ce rotor reçoit du milieu de travail. Ce couple de travail est moteur ou résistant selon que le couple reçu du milieu de travail est résistant ou moteur, l'organe d'équilibrage étant alors un moteur ou un organe entraíné, respectivement.
According to these common provisions, each of these compressors comprises the following essential elements:
  • A stator 52 or 2.
  • A rotor 54 or 4 rotating around a substantially horizontal axis 56 or 6 to perform, on a fluid working environment, a job such that this rotor receives from this environment both a torque and an axial thrust. In the case of the rotor of a multi-stage centrifugal compressor acting on a gaseous working medium, the torque received from this medium is a resistant torque. However, such a torque can also be a driving force, for example in the case of the rotor of a gas turbine.
  • Finally, a torque balancing member 58 or 8 rotating like this rotor and applying to it a working torque balancing the torque that this rotor receives from the working environment. This working torque is motor or resistant depending on whether the torque received from the working environment is resistant or motor, the balancing member then being a motor or a driven member, respectively.

Le stator comporte au moins :

  • deux paliers 60 et 62, ou 10 et 12, pour supporter le rotor,
  • et une pièce statorique de butée axiale 64 ou 14 pour maintenir axialement ce rotor en lui appliquant une poussée de butée axiale.
The stator comprises at least:
  • two bearings 60 and 62, or 10 and 12, to support the rotor,
  • and an axial stop stator piece 64 or 14 for axially holding this rotor by applying to it an axial stop thrust.

Le rotor comporte au moins les éléments suivants :

  • Un arbre 66 ou 16 s'étendant selon l'axe 56 ou 6.
  • Deux portées de paliers 68 et 70 ou 18, et 20 formées sur cet arbre et coopérant respectivement avec les deux paliers 60 et 62 ou 10 et 12 pour supporter cet arbre. Ces deux portées de paliers définissent entre elles sur cet arbre un segment de travail 72 ou 22.
  • Des organes de travail 74, 76 et 78 ou 24, 26, et 28 montés sur cet arbre dans ce segment de travail pour effectuer ledit travail lorsque ce rotor est en rotation. Leur nombre est variable et fonction des performances demandées.
  • Un ensemble rotorique de butée axiale 80 et 82 ou 30 et 32 comportant d'une part une base de raccordement de butée de forme tubulaire 80 ou 30 portant coaxialement sur cet arbre à l'extérieur de ce segment de travail, d'autre part une butée tournante présentant une partie périphérique 82 ou 32 formant saillie radiale sur cet arbre et sur cette base de raccordement de butée. Cette butée tournante coopére avec la pièce statorique de butée axiale pour transmettre la poussée de butée axiale à cet arbre par l'intermédiaire de cette base de raccordement de butée.
  • Enfin un ensemble rotorique d'accouplement 81 et 84 ou 30 et 34 comportant d'une part une base de raccordement d'accouplement 81 ou 30 de forme tubulaire portant coaxialement sur cet arbre à l'extérieur dudit segment de travail, d'autre part une paroi d'accouplement 84 ou 34 formant saillie radiale sur cet arbre et sur cette base de raccordement d'accouplement. Cette paroi d'accouplement est accouplée à l'organe d'équilibrage de couple 58 ou 8 pour transmettre le couple de travail à cet arbre par l'intermédiaire de cette base de raccordement d'accouplement.
The rotor comprises at least the following elements:
  • A shaft 66 or 16 extending along the axis 56 or 6.
  • Two bearing surfaces 68 and 70 or 18, and 20 formed on this shaft and cooperating respectively with the two bearings 60 and 62 or 10 and 12 to support this shaft. These two bearing surfaces define between them on this shaft a working segment 72 or 22.
  • Working members 74, 76 and 78 or 24, 26, and 28 mounted on this shaft in this working segment to perform said work when this rotor is in rotation. Their number is variable and depends on the performance requested.
  • An axial stop rotor assembly 80 and 82 or 30 and 32 comprising on the one hand a stop connection base of tubular shape 80 or 30 bearing coaxially on this shaft outside this working segment, on the other hand a rotary stop having a peripheral part 82 or 32 forming a radial projection on this shaft and on this stop connection base. This rotary stop cooperates with the stator axial stop piece to transmit the axial stop thrust to this shaft via this stop connection base.
  • Finally a rotor coupling assembly 81 and 84 or 30 and 34 comprising on the one hand a coupling connection base 81 or 30 of tubular shape bearing coaxially on this shaft outside said working segment, on the other hand a coupling wall 84 or 34 forming a radial projection on this shaft and on this coupling connection base. This coupling wall is coupled to the torque balancing member 58 or 8 to transmit the working torque to this shaft via this coupling connection base.

La butée tournante et la paroi d'accouplement présentent typiquement les formes respectives d'un disque de butée et d'un plateau d'accouplement. Leurs bases de raccordement sont montées à l'extérieur du segment de travail pour limiter la portée de l'arbre et les masses supportées par celui-ci entre les paliers. Le palier 62 ou 12 le plus proche du plateau d'accouplement sera dit ci-après "palier avant".The rotary stop and the coupling wall typically have the respective shapes of a stop and a coupling plate. Their bases of connection are mounted outside the segment of work to limit the range of the tree and the masses supported by it between the bearings. Landing 62 or 12 closest to the coupling plate will be said below "front landing".

L'organe d'équilibrage de couple transmet le couple de travail au plateau d'accouplement par l'intermédiaire d'un système d'accouplement flexible 87 ou 37 permettant des délignages en rotation entre l'arbre du rotor et celui de l'organe d'équilibrage de couple tout en découplant les vibrations de flexion des deux arbres.The torque balancing device transmits the torque from work on the coupling plate via a flexible coupling system 87 or 37 allowing rotational edgings between the rotor shaft and that of the torque balancing member while decoupling the bending vibrations of the two shafts.

Dans le cas donné en exemple d'un compresseur centrifuge multiétagé les organes de travail du rotor sont des roues à aubes telles que 24, 26 et 28. Le stator comporte alors lui aussi des organes de travail constitués par des couronnes à aubes fixes non représentées coopérant avec ces roues à aubes. Quant au rotor il comporte en outre classiquement :

  • un piston d'équilibrage 86 ou 36 monté sur l'arbre au voisinage des roues pour équilibrer une partie de la poussée axiale reçue du gaz de travail, ces roues et ce piston constituant un ensemble central,
  • deux labyrinthes 88 et 90 ou 38 et 40 montés sur l'arbre dans le segment de travail de part et d'autre de cet ensemble central pour limiter les déplacements du gaz de travail vers les paliers,
  • et deux garnitures d'étanchéité 92 et 94 ou 42 et 44 montées sur l'arbre respectivement entre ces deux labyrinthes et les deux paliers 60 et 62 ou 10 et 12 pour empêcher des fuites du gaz de travail.
In the example given of a multistage centrifugal compressor, the working members of the rotor are impellers such as 24, 26 and 28. The stator then also includes working members constituted by crowns with fixed blades not shown. cooperating with these impellers. As for the rotor, it also conventionally comprises:
  • a balancing piston 86 or 36 mounted on the shaft in the vicinity of the wheels to balance part of the axial thrust received from the working gas, these wheels and this piston constituting a central assembly,
  • two labyrinths 88 and 90 or 38 and 40 mounted on the shaft in the working segment on either side of this central assembly to limit the displacements of the working gas towards the bearings,
  • and two seals 92 and 94 or 42 and 44 mounted on the shaft respectively between these two labyrinths and the two bearings 60 and 62 or 10 and 12 to prevent leakage of the working gas.

Dans la machine connue représentée à la figure 1 le disque de butée 82 est monté près du palier arrière 60 pour limiter la longueur de porte à faux de l'arbre au-delà du palier avant.In the known machine shown in Figure 1 the thrust disc 82 is mounted near the rear bearing 60 to limit the length of the tree overhang beyond the front landing.

Selon la présente invention les bases de raccordement de butée axiale et d'accouplement sont une seule et même base de raccordement 30.According to the present invention the connection bases axial stop and coupling are one and the same connection base 30.

Cette intégration des deux bases de raccordement précedemment utilisées en une seule permet de limiter la masse totale supportée par l'arbre en porte à faux au delà des paliers. Elle supprime tout porte à faux gênant au delà du palier arrière.This integration of the two connection bases previously used in one allows to limit the total mass supported by the cantilevered shaft beyond bearings. It removes any annoying overhang beyond rear bearing.

De préférence les ensembles rotoriques de butée axiale et d'accouplement sont constitués par une seule et même pièce de transmission 30, 32, 34 comportant la base de raccordement 30. Cette base se raccorde au bord intérieur d'un disque de transmission 32, 34 de forme annulaire. Une partie centrale 34 de ce disque de transmission constitue la paroi d'accouplement, une partie périphérique 32 de ce disque de transmission constituant la butée tournante.Preferably the axial stop rotor assemblies and coupling consist of one and the same transmission part 30, 32, 34 comprising the base of connection 30. This base is connected to the inner edge a transmission disc 32, 34 of annular shape. A central part 34 of this transmission disc constitutes the coupling wall, a peripheral part 32 of this transmission disc constituting the rotary stop.

La base de raccordement pourrait être montée autour de l'arbre. Cependant, de préférence, selon l'invention, l'arbre 16 est creux au moins au voisinage de son extrémité avant 17 et la base de raccordement 30 est fixée contre la surface intérieure de cet arbre au voisinage de cette extrémité. La butée tournante 32 et la paroi d'accouplement s'étendent radialement et sont alors situées axialement en avant de cette extrémité avant.The connection base could be mounted around the tree. However, preferably, according to the invention, the shaft 16 is hollow at least near its end front 17 and the connection base 30 is fixed against the inner surface of this tree in the vicinity of this end. The rotary stop 32 and the coupling wall extend radially and are then located axially in front of this front end.

La surface de portée sur l'arbre de la base de raccordement 30 peut être conique, comme représenté, ou cylindrique. Elle est montée par emmanchement hydraulique ou à chaud, pratiquement à l'intérieur de la portée du palier avant.The bearing surface on the base shaft connection 30 can be conical, as shown, or cylindrical. It is mounted by hydraulic fitting or hot, practically within the bearing range before.

Elle est bloquée axialement par une vis axiale 46 s'étendant dans la base de raccordement 30 et se vissant dans un épaulement interne 48 de l'arbre 6. Des cales de réglage 47 permettent de définir avec précision la position longitudinale de la base de raccordement 30.It is locked axially by an axial screw 46 extending into the connection base 30 and screwing in an internal shoulder 48 of the shaft 6. Wedges of setting 47 allow precise positioning longitudinal of the connection base 30.

Claims (2)

  1. A rotary machine with axial thrust comprising:
    a stator (2),
    a rotor (4) turning around an essentially horizontal axis (6) to perform work in an environment such that this rotor receives from this environment both the torque and the axial thrust,
    and a torque balancing device (8) turning like this rotor and applying to it a working torque balancing the torque that this rotor receives from the work environment.
    This stator has, at least,:
    two radial bearings (10, 12) to support the rotor
    and a thrust-beanng stator part (14) to sustain this rotor axially by applying an axial thrust.
    This rotor has, at least,:
    a shaft (16) extending along said axis,
    two bearing spans (18, 20) formed on this shaft joining respectively with the two said radial beanngs (10, 12) to support this shaft with these two bearing spans defining a work segment between them on this shaft (22),
    work devices (24, 26, 28) mounted on this shaft in this work segment to perform said work when this rotor is rotating,
    a thrust-bearing rotor assembly (30, 32) consisting of a tubular shaped connection base (30) beanng coaxially on this shaft outside this work segment and a rotating bearing having a peripheral part (32) forming a radial overhang on this shaft and on this bearing connection base. This rotating bearing participates with the said axial bearing stator part in transmitting the said thrust of the thrust beanng to the shaft via this bearing connection base.
    and a rotor coupling assembly (30, 34) consisting of said connection base and a coupling wall (34) forming a radial overhang on this shaft and on the coupling connection base. This coupling wall is connected to said torque balancing device (8) to transmit said work torque to this shaft via this coupling connection base.
    This machine is characterized by the fact that said connection base (30) is connected to the inner edge of an annular transmission disk (32, 34) with a central part (34) of this transmission disk constituting said coupling wall and a penpheral part (32) of this transmission disk constituting said rotating bearing.
  2. Machine according to claim 1
    This machine is characterized by the fact that said shaft (16) is hollow at least in the vicinity of its front end (17), said connection base (30) being held against the inside surface of this shaft in the vicinity of this front end. The rotating bearing (32) and coupling wall extend radially and are located before this front end.
EP95402111A 1994-09-23 1995-09-19 Rotating machine with axial thrust Expired - Lifetime EP0703366B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9411365A FR2724974B1 (en) 1994-09-23 1994-09-23 ROTARY AXIAL PUSH MACHINE
FR9411365 1994-09-23

Publications (2)

Publication Number Publication Date
EP0703366A1 EP0703366A1 (en) 1996-03-27
EP0703366B1 true EP0703366B1 (en) 1998-11-18

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EP95402111A Expired - Lifetime EP0703366B1 (en) 1994-09-23 1995-09-19 Rotating machine with axial thrust

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EP (1) EP0703366B1 (en)
DE (1) DE69506069T2 (en)
FR (1) FR2724974B1 (en)
NO (1) NO953728L (en)

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EP2414637A2 (en) * 2009-04-01 2012-02-08 Siemens Aktiengesellschaft Rotor for a turbomachine

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US1789329A (en) * 1923-04-19 1931-01-20 Carrier Engineering Corp Sealing and thrust balancing means for rotary compressors and analogous machines
US4234290A (en) * 1978-11-30 1980-11-18 Binks Manufacturing Company Turbine pump
DE3214030C2 (en) * 1981-05-22 1986-01-02 Klein, Schanzlin & Becker Ag, 6710 Frankenthal Rigid shaft coupling for centrifugal pumps arranged with a vertical shaft

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NO953728L (en) 1996-03-25
DE69506069T2 (en) 1999-05-20
FR2724974B1 (en) 1996-11-22
EP0703366A1 (en) 1996-03-27
DE69506069D1 (en) 1998-12-24
NO953728D0 (en) 1995-09-21
FR2724974A1 (en) 1996-03-29

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