EP1604115B1 - Integrated centrifugal compressor unit - Google Patents
Integrated centrifugal compressor unit Download PDFInfo
- Publication number
- EP1604115B1 EP1604115B1 EP03727579.9A EP03727579A EP1604115B1 EP 1604115 B1 EP1604115 B1 EP 1604115B1 EP 03727579 A EP03727579 A EP 03727579A EP 1604115 B1 EP1604115 B1 EP 1604115B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- compressor unit
- compressor
- casing
- unit according
- motor
- 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
- 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
- F04D29/056—Bearings
- F04D29/058—Bearings magnetic; electromagnetic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
- F04D17/12—Multi-stage pumps
- F04D17/122—Multi-stage pumps the individual rotor discs being, one for each stage, on a common shaft and axially spaced, e.g. conventional centrifugal multi- stage compressors
- F04D17/125—Multi-stage pumps the individual rotor discs being, one for each stage, on a common shaft and axially spaced, e.g. conventional centrifugal multi- stage compressors the casing being vertically split
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/022—Units comprising pumps and their driving means comprising a yielding coupling, e.g. hydraulic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
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- 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 invention relates to a turbocharger or motor-compressor and, in particular, an integrated motor-compressor unit, as disclosed in the documents US4969803 and US6464469 B1 .
- the integrated motor-compressor units comprise a sealed common housing 10, in which are placed an electric motor 12 and a compressor unit 14, for example multi-stage, which comprises a set of paddle wheels, such as 16, carried by a shaft 18.
- the motor 12 rotates a rotor 20, this rotor 20 being coupled to the shaft 18 of the compressor 14 via a rigid coupling 22.
- Bearings 24, 26 and 28 are used to support the line of trees of the motor-compressor unit.
- the assembly is placed in a common housing 29.
- the gas to be handled is presented at the inlet E of the turbocharger and is then transmitted to the successive compression stages of the compressor unit to be delivered at the output S.
- An axial bearing 30 is used to prevent the axial displacement of the compressor 14 during its operation. .
- This type of arrangement has the advantage of considerably simplifying the shaft line of the compressor unit since the assembly consisting of the motor, its rotor and its end bearings, as well as by the rigid coupling. and by the axial stop, are located inside the housing and are subjected to the pressure of the gas admitted to the inlet of the first compression stage.
- the object of the invention is therefore to overcome these disadvantages.
- the invention therefore relates to a centrifugal compressor unit comprising a motor, at least one compressor comprising a driven shaft driven by the motor rotor and an assembly of at least two impellers mounted on the driven shaft, the assembly consisting of the motor and the compressor being mounted in a gas-tight common housing operated by the compressor unit.
- the rotor and the driven shaft are connected by a flexible coupling disposed in the housing.
- the casing comprises a plurality of casing elements joined together in leaktight manner, each casing element enclosing the motor or a compressor.
- the housing is provided with an orifice formed between the adjacent housing elements for access to the flexible coupling, said orifice being provided with sealing means.
- the flexible coupling includes a diaphragm or flexible blade coupling, or a torsion shaft coupling.
- each end of the driven shaft and the rotor is supported by an end bearing, which can be secured to the housing.
- the end bearings are radial magnetic bearings.
- the compressor unit comprises an axial abutment on which the shaft rests driven compressor, during operation of the turbocharger.
- This stop is for example a magnetic stop.
- a motor-compressor essentially comprises an electric motor 34 with a high rotation speed (6000 to 16 000 rpm) powered by a frequency converter and comprising a stator 36 and a rotor 38 supported by two end bearings 40 and 42, and a compressor unit 44 having a set of impeller wheels 46, 48, 50 and 52, mounted on a driven shaft 54.
- the assembly is mounted on a pedestal (not shown) and is disposed in a housing 55 common gas-tight handled by the turbocharger.
- the motor-compressor unit 44 may comprise any number of such impellers, or, as will be described later, comprise another arrangement of the impeller wheels.
- the housing is composed of an assembly of integral housing elements such as 55a and 55b, each providing support and protection of the motor or a compression stage, and secured by appropriate fastening means.
- the compressor shaft 44 is journalled in bearings 55 and 56.
- a gas inlet port 58 in the turbocharger 32 formed in the casing opens out at the first compression stage, constituted by the paddle wheel designated by FIG. reference 46, while an outlet port 60 recovers the gas handled by the turbocharger, at the outlet of the last compression stage constituted by the impeller designated by the reference numeral 52, as designated by the arrows F.
- an axial stop 62 integral with the driven shaft is disposed between two fixed bearings 66 and 68, so as to limit the axial overshoot of the driven shaft 54 compressor stage 44, together with an axial aerodynamic balancing piston 70.
- a flexible coupling 72 couples the rotor 38 of the motor 34 and the driven shaft 54 of the compressor stage 44.
- a coupling 72 can be made either from a diaphragm-type coupling or from a flexible blade-type coupling, or a torsion-shaft type coupling.
- any other type of flexible coupling suitable for the intended use may be used. It should be noted, however, that the use of a torsion-shaft-type coupling makes it possible to reduce ventilation losses, to reduce the level of noise generated, and to propagate more easily the axial thrust provided by the motor.
- the housing is provided with an orifice 76 which opens out opposite the junction zone between the rotor 38 and the driven shaft 54.
- This orifice is associated with a removable sealing device 78
- the entire interior of the turbocharger is bathed by the process gas handled by the compressor, including the flexible coupling 72.
- the internal volume of the turbocharger has no shaft outlet seal, but only rotary joints 80 which are subjected to small pressure differences, such as labyrinth type rotary joints which serve for the operation of the compressor.
- the engine is left at the suction pressure of the compressor, and a flow of gas is organized to ensure its cooling.
- the radial bearings 40, 42, 55 and 56 used for supporting the rotors do not require a supply of lubricating fluid.
- these bearings are controlled so that they adapt to the dynamic behavior of the rotor or the driven shaft 54 which they provide support, that is to say generally rigid on the motor side and generally flexible on the driven shaft side.
- the bearings 40, 42, 55 and 56 are fixed rigidly relative to the housing. These forces are constituted by the radial forces of weight, the dynamic radial forces related to the residual unbalances, and the axial forces due to the resultant aerodynamic thrust on the stages of compression. These bearings also allow a radial displacement of the rotor or the driven shaft which they provide support, to enable lineation of these elements of the shaft line during maintenance phases.
- the casing is constituted by an assembly of casing elements respectively providing support for the motor and the compression stage, these casing elements being rigidly and sealingly associated.
- the ends mutually opposite sides 82 and 84 of the casing thus formed are closed, on the one hand by a bolted bottom 86, on which are fixed the bearings 40 of the rotor 38 and, on the other hand, by a second bottom 88 which supports the bearing 56 in which the driven shaft 54 and the balancing piston 70, which is fixed on the housing, for example by means of shear rings 90, is journalled.
- the invention which has just been described, which uses an electric motor and a compressor unit arranged in a sealed common housing and whose shafts respectively driving and driven are secured by means of a flexible coupling disposed in the gas handled by the turbocharger, has several advantages.
- each of the rotors, engine and compressor unit retains the vibratory behavior of its own.
- the motor rotor is generally of rigid type, with the first critical bending speed above the speed of rotation.
- the compressor rotor is generally of flexible type, with the first critical bending speed below the maximum rotational speed. In this way, it is not possible to create specific modes of bending coupled between the two rotors which, during operation, may develop hot spots on the rotor of the motor, constituting thermal imbalances of phase and of uncontrollable amplitude.
- the presence of a flexible coupling also facilitates the positioning of the first natural torsional frequency, and also contributes to reducing the stress in the compressor shaft end in the event of an electrical short-circuit at the motor terminals.
- the flexible coupling can be uncoupled from the orifice 76 passing through the housing, and each of the rotor and driven shaft can be extracted while the other continues to be supported by its two levels. In this way, the rotor and driven shaft are protected during this operation, the reassembly is much faster and lineage and dynamic balancing facilitated, because of the access to the two central planes on each end of tree.
- the compressor unit 44 is arranged so that the entire rotor-diaphragm assembly can be pulled from the body at the same time as the bottom 88, without having to separate the casing from its base and the pipework. process gas. It will be noted that, during these assembly-disassembly phases, the rotors rest on their respective bearings without risk of damage to the rotating parts as well as stator parts which could otherwise come into contact with the rotors during these operations.
- turbocharger equipped with a multi-stage compressor integrated in line with a single compression section and four stages
- the invention is also applicable to other types of motor-compressors, for example to two sections S1 and S2 in line, for example two stages each, ensuring each compression of a process gas with, for example, intermediate cooling.
- two inputs E'1 and E'2 and two outputs S'1 and S'2 opposite the input and output of each of these sections are provided in the housing ( figure 3 ).
- the first compression stage of one of the sections S2 may be arranged facing the second compression stage of the other section S1.
- the first compression stages of each of sections S1 and S2 may be arranged side by side.
- the pressure prevailing in the engine will be that of suction on the low pressure side.
- each of the compression bodies prefferably have gas extraction means or reinjection devices, which then considerably increases the number of combinations of possible arrangements.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Supercharger (AREA)
- Medicines Containing Plant Substances (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Rotary Pumps (AREA)
Description
L'invention concerne un turbocompresseur ou moto-compresseur et, en particulier, un groupe moto-compresseur intégré, tel que divulgué dans les documents
En se référant à la
En fonctionnement, le gaz à manipuler est présenté en entrée E du turbocompresseur puis est transmis aux étages successifs de compression du groupe compresseur pour être délivré en sortie S. Un palier axial 30 est utilisé pour empêcher le déplacement axial du compresseur 14 lors de son fonctionnement.In operation, the gas to be handled is presented at the inlet E of the turbocharger and is then transmitted to the successive compression stages of the compressor unit to be delivered at the output S. An
Ce type d'agencement présente l'avantage de simplifier de manière considérable la ligne d'arbres du groupe compresseur dans la mesure où l'ensemble constitué par le moteur, son rotor et ses paliers d'extrémité, ainsi que par l'accouplement rigide et par la butée axiale, se situent à l'intérieur du carter et sont soumis à la pression du gaz admis en entrée du premier étage de compression. En outre, il est possible, avec un tel agencement, de doter la ligne d'arbres de plusieurs étages de compression, tout en limitant sa longueur.This type of arrangement has the advantage of considerably simplifying the shaft line of the compressor unit since the assembly consisting of the motor, its rotor and its end bearings, as well as by the rigid coupling. and by the axial stop, are located inside the housing and are subjected to the pressure of the gas admitted to the inlet of the first compression stage. In addition, it is possible, with such an arrangement, to provide the line of trees of several stages of compression, while limiting its length.
Cependant, une telle structure présente un inconvénient majeur, dans la mesure où, lors de son assemblage, elle nécessite un alignement parfait du rotor et de l'arbre mené du compresseur. En outre, la solidarisation du rotor et de l'arbre du compresseur dégrade considérablement le comportement vibratoire de la ligne d'arbres.However, such a structure has a major disadvantage, insofar as, during its assembly, it requires a perfect alignment of the rotor and the driven shaft of the compressor. In addition, the fastening of the rotor and the compressor shaft considerably degrades the vibratory behavior of the line of trees.
Le but de l'invention est donc de pallier ces inconvénients.The object of the invention is therefore to overcome these disadvantages.
L'invention a donc pour objet un groupe compresseur centrifuge comprenant un moteur, au moins un compresseur comportant un arbre mené entraîné par le rotor du moteur et un ensemble d'au moins deux roues à aubes montées sur l'arbre mené, l'ensemble constitué par le moteur et le compresseur étant monté dans un carter commun étanche au gaz manipulé par le groupe compresseur.The invention therefore relates to a centrifugal compressor unit comprising a motor, at least one compressor comprising a driven shaft driven by the motor rotor and an assembly of at least two impellers mounted on the driven shaft, the assembly consisting of the motor and the compressor being mounted in a gas-tight common housing operated by the compressor unit.
Le rotor et l'arbre mené sont reliés par un accouplement flexible disposé dans le carter.The rotor and the driven shaft are connected by a flexible coupling disposed in the housing.
On conçoit dès lors qu'il est possible de s'affranchir des problèmes rédhibitoires d'alignement des arbres menant et mené. En outre, le rotor et l'arbre du compresseur conservent des comportements vibratoires qui leur sont propres, dans la mesure où ces éléments de la ligne d'arbres du groupe compresseur restent mécaniquement découplés.It is therefore conceivable that it is possible to overcome the crippling problems of alignment of leading and driven trees. In addition, the rotor and the compressor shaft maintain vibratory behaviors of their own, insofar as these elements of the shaft of the compressor group remain mechanically decoupled.
Selon une autre caractéristique de l'invention, le carter comporte plusieurs éléments de carter solidarisés entre eux de manière étanche, chaque élément de carter enfermant le moteur ou un compresseur.According to another characteristic of the invention, the casing comprises a plurality of casing elements joined together in leaktight manner, each casing element enclosing the motor or a compressor.
Afin de faciliter l'assemblage, le carter est pourvu d'un orifice ménagé entre les éléments de carter adjacents pour l'accès à l'accouplement flexible, ledit orifice étant muni de moyens d'obturation étanche.To facilitate assembly, the housing is provided with an orifice formed between the adjacent housing elements for access to the flexible coupling, said orifice being provided with sealing means.
Dans différents modes de réalisation, l'accouplement flexible comporte un accouplement à diaphragme ou à lame flexible, ou un accouplement à arbre torsible.In various embodiments, the flexible coupling includes a diaphragm or flexible blade coupling, or a torsion shaft coupling.
De préférence, chaque extrémité de l'arbre mené et du rotor est supportée par un palier d'extrémité, qui peut être solidarisé au carter. Par exemple, les paliers d'extrémité sont des paliers magnétiques radiaux.Preferably, each end of the driven shaft and the rotor is supported by an end bearing, which can be secured to the housing. For example, the end bearings are radial magnetic bearings.
Selon une autre caractéristique de l'invention, le groupe compresseur comporte une butée axiale sur laquelle s'appuie l'arbre mené du compresseur, lors du fonctionnement du turbocompresseur. Cette butée est par exemple une butée magnétique.According to another characteristic of the invention, the compressor unit comprises an axial abutment on which the shaft rests driven compressor, during operation of the turbocharger. This stop is for example a magnetic stop.
D'autres buts, caractéristiques et avantages de l'invention apparaîtront à la lecture de la description suivante, donnée uniquement à titre d'exemple non limitatif, et faite en référence aux dessins annexés, sur lesquels :
- la
figure 1 , dont il a déjà été fait mention, illustre la structure générale d'un groupe compresseur conforme à l'état de la technique ; - la
figure 2 est un schéma synoptique illustrant la structure générale d'un groupe compresseur conforme à l'invention ; - la
figure 3 illustre un autre mode de réalisation d'un groupe compresseur conforme à l'invention ; - la
figure 4 illustre un troisième mode de réalisation d'un groupe compresseur conforme à l'invention ; et - la
figure 5 illustre un quatrième mode de réalisation d'un groupe compresseur selon l'invention ; et - la figure 6 illustre un cinquième mode de réalisation d'un groupe compresseur selon l'invention.
- the
figure 1 , which has already been mentioned, illustrates the general structure of a compressor group according to the state of the art; - the
figure 2 is a block diagram illustrating the general structure of a compressor unit according to the invention; - the
figure 3 illustrates another embodiment of a compressor unit according to the invention; - the
figure 4 illustrates a third embodiment of a compressor unit according to the invention; and - the
figure 5 illustrates a fourth embodiment of a compressor unit according to the invention; and - FIG. 6 illustrates a fifth embodiment of a compressor unit according to the invention.
En se référent à la
Bien entendu, le groupe moto-compresseur 44 peut comporter un nombre quelconque de telles roues à aubes, ou, comme cela sera décrit par la suite, comporter un autre agencement des roues à aubes.Of course, the motor-
Comme on le voit sur la
L'arbre du compresseur 44 tourillonne dans des paliers 55 et 56. Un orifice 58 d'admission de gaz dans le turbocompresseur 32, ménagé dans le carter, débouche au niveau du premier étage de compression, constitué par la roue à aubes désignée par la référence 46, tandis qu'un orifice de sortie 60 récupère le gaz manipulé par le turbocompresseur, en sortie du dernier étage de compression constitué par la roue à aubes désignée par la référence numérique 52, comme désigné par les flèches F.The
Afin de supporter les efforts engendrés lors du fonctionnement de l'étage de compression 44, une butée axiale 62 solidaire de l'arbre mené est disposée entre deux paliers 66 et 68 fixes, de manière à limiter le dépassement axial de l'arbre mené 54 de l'étage compresseur 44, conjointement avec un piston d'équilibrage aérodynamique axial 70.In order to withstand the forces generated during the operation of the
Un accouplement flexible 72 assure l'accouplement du rotor 38 du moteur 34 et de l'arbre mené 54 de l'étage compresseur 44. Un tel accouplement 72 peut être réalisé soit à partir d'un accouplement de type à diaphragme, soit à partir d'un accouplement de type à lame flexible, ou encore un accouplement de type à arbre torsible. Cependant, tout autre type d'accouplement flexible approprié pour l'utilisation envisagée peut être utilisé. On notera néanmoins que l'utilisation d'un accouplement de type à arbre torsible permet de réduire les pertes par ventilation, de réduire le niveau de bruit généré, et de propager plus facilement la poussée axiale procurée par le moteur.A
Pour accéder à cet accouplement 72, le carter est pourvu d'un orifice 76 qui débouche au regard de la zone de jonction entre le rotor 38 et l'arbre mené 54. Cet orifice est associé à un dispositif d'obturation étanche 78 amovibleTo access this
On notera enfin que tout l'intérieur du turbocompresseur est baigné par le gaz du procédé manipulé par le compresseur, y compris l'accouplement flexible 72. En particulier, le volume interne du turbocompresseur ne comporte aucune étanchéité de sortie d'arbre, mais uniquement des joints tournants 80 qui sont soumis à de faibles différences de pression, comme par exemple des joints tournants de type labyrinthe qui servent au fonctionnement du compresseur. Afin de limiter les pertes par ventilation, le moteur est laissé à la pression d'aspiration du compresseur, et une circulation de gaz est organisée pour assurer son refroidissement.Note finally that the entire interior of the turbocharger is bathed by the process gas handled by the compressor, including the
On notera également que les paliers radiaux 40, 42, 55 et 56 utilisés pour le support des rotors ne nécessitent pas d'alimentation en fluide de lubrification. Dans le cas où l'on utilise des paliers magnétiques actifs, ces paliers sont commandés de manière qu'ils s'adaptent au comportement dynamique du rotor ou de l'arbre mené 54 dont ils assurent le support, c'est-à-dire généralement rigide du côté du moteur et généralement flexible du côté de l'arbre mené.It will also be noted that the
Afin de transmettre les efforts liés au fonctionnement du groupe compresseur au carter, les paliers 40, 42, 55 et 56 sont fixés de manière rigide par rapport au carter. Ces efforts sont constitués par les efforts radiaux de poids, les efforts radiaux dynamiques liés aux balourds résiduels, et les efforts axiaux dus à la résultante de poussée aérodynamique sur les étages de compression. Ces paliers autorisent en outre un déplacement radial du rotor ou de l'arbre mené dont ils assurent le support, afin de permettre de réaliser le lignage de ces éléments de la ligne d'arbres pendant les phases de maintenance.In order to transmit the efforts related to the operation of the compressor unit to the housing, the
Comme indiqué précédemment, le carter est constitué par un assemblage d'éléments de carter assurant respectivement le support du moteur et de l'étage de compression, ces éléments de carter étant associés de manière rigide et étanche. Les extrémités mutuellement opposées 82 et 84 du carter ainsi formées sont obturées, d'une part par un fond boulonné 86, sur lequel sont fixés les paliers 40 du rotor 38 et, d'autre part, par un deuxième fond 88 qui supporte le palier 56 dans lequel tourillonne l'arbre mené 54 et le piston d'équilibrage 70, et qui est fixé sur le carter par exemple au moyen d'anneaux de cisaillement 90.As indicated above, the casing is constituted by an assembly of casing elements respectively providing support for the motor and the compression stage, these casing elements being rigidly and sealingly associated. The ends mutually
Comme on le conçoit, l'invention qui vient d'être décrite, qui utilise un moteur électrique et un groupe compresseur disposés dans un carter commun étanche et dont les arbres respectivement menant et mené sont solidarisés au moyen d'un accouplement flexible disposé dans le gaz manipulé par le turbocompresseur, présente plusieurs avantages.As it is conceivable, the invention which has just been described, which uses an electric motor and a compressor unit arranged in a sealed common housing and whose shafts respectively driving and driven are secured by means of a flexible coupling disposed in the gas handled by the turbocharger, has several advantages.
Tout d'abord, sur le plan de la conception mécanique, chacun des rotors, moteur et groupe compresseur, conserve le comportement vibratoire qui lui est propre. On notera que le rotor du moteur est en général de type rigide, avec la première vitesse critique de flexion au-dessus de la vitesse de rotation. Le rotor du compresseur est généralement de type flexible, avec la première vitesse critique de flexion au-dessous de la vitesse de rotation maximale. On évite ainsi de créer des modes propres de flexion couplés entre les deux rotors risquant de développer, lors du fonctionnement, des points chauds sur le rotor du moteur, constituant des balourds thermiques de phase et d'amplitude non contrôlable.First of all, in terms of mechanical design, each of the rotors, engine and compressor unit, retains the vibratory behavior of its own. It should be noted that the motor rotor is generally of rigid type, with the first critical bending speed above the speed of rotation. The compressor rotor is generally of flexible type, with the first critical bending speed below the maximum rotational speed. In this way, it is not possible to create specific modes of bending coupled between the two rotors which, during operation, may develop hot spots on the rotor of the motor, constituting thermal imbalances of phase and of uncontrollable amplitude.
De plus, l'équilibrage dynamique des deux rotors est facilité du fait du découplage ainsi réalisé.In addition, the dynamic balancing of the two rotors is facilitated due to the decoupling thus achieved.
La présence d'un accouplement flexible facilite par ailleurs le positionnement de la première fréquence propre de torsion, et contribue en outre à diminuer la sollicitation dans le bout d'arbre du compresseur en cas de court-circuit électrique aux bornes du moteur.The presence of a flexible coupling also facilitates the positioning of the first natural torsional frequency, and also contributes to reducing the stress in the compressor shaft end in the event of an electrical short-circuit at the motor terminals.
Par ailleurs, sur le plan de la maintenance, l'accouplement souple peut être désaccouplé à partir de l'orifice 76 traversant le carter, et chacun des rotor et arbre mené, peut être extrait alors que l'autre continue à être supporté par ses deux paliers. De cette façon, les rotor et arbre mené sont protégés lors de cette opération, le remontage étant beaucoup plus rapide et le lignage et l'équilibrage dynamique facilités, en raison de l'accès aux deux plans centraux sur chaque bout d'arbre.Moreover, in terms of maintenance, the flexible coupling can be uncoupled from the
Par ailleurs, l'utilisation d'un fond boulonné d'un côté et d'un fonds retenu par anneaux de cisaillement de l'autre, pour l'obturation du carter, permet de faciliter le démontage du turbocompresseur. En effet, pour procéder à ce démontage, il convient tout d'abord d'ôter le fond boulonné 86 et d'extraire le groupe moteur 34.Moreover, the use of a bottom bolted on one side and a fund retained by shear rings on the other, for closing the casing, makes it easier to disassemble the turbocharger. Indeed, to proceed with this disassembly, it is first necessary to remove the bolted bottom 86 and extract the
En ce qui concerne le groupe compresseur 44, celui-ci est agencé de sorte que tout l'ensemble rotor-diaphragme puisse être tiré du corps en même temps que le fond 88, sans avoir à désolidariser le carter de son socle et des tuyauteries de gaz de procédé. On notera que, au cours de ces phases de montage-démontage, les rotors reposent sur leurs paliers respectifs sans risque d'endommagement des pièces tournantes ainsi que des pièces statoriques qui pourraient sinon entrer en contact avec les rotors lors de ces opérations.As regards the
On notera enfin que l'invention n'est pas limitée au mode de réalisation décrit.Finally, note that the invention is not limited to the embodiment described.
En effet, alors que sur la
Dans ce cas, comme visible sur cette
Au contraire, comme visible sur la
On notera enfin que, comme visible sur la
Dans ce cas, selon cet agencement, selon lequel les groupes compresseurs sont disposés de part et d'autre du moteur, la pression régnant dans le moteur sera celle d'aspiration du côté basse pression.In this case, according to this arrangement, according to which the compressor units are arranged on either side of the engine, the pressure prevailing in the engine will be that of suction on the low pressure side.
Il est aussi possible que chacun des corps de compression possède des moyens d'extraction de gaz, ou des dispositifs de réinjection, ce qui augmente alors considérablement le nombre de combinaisons d'arrangements possibles.It is also possible for each of the compression bodies to have gas extraction means or reinjection devices, which then considerably increases the number of combinations of possible arrangements.
On notera enfin que l'invention qui vient d'être décrite permet, outre la conservation des caractéristiques dynamiques des rotors, d'éviter complètement les fuites de gaz vers l'extérieur.Finally, it should be noted that the invention which has just been described makes it possible, in addition to preserving the dynamic characteristics of the rotors, to completely avoid gas leakage to the outside.
Elle permet également d'éliminer les garnitures d'étanchéité et leurs systèmes auxiliaires de surveillance.It also eliminates gaskets and their auxiliary monitoring systems.
Claims (9)
- Centrifugal compressor unit, comprising a motor (34), at least one compressor (44; 44', 44") comprising a driven shaft (54; 54' , 54") driven by the rotor (38) of the motor, and a set of bladed disks mounted on the driven shaft, the assembly consisting of the motor and the compressor being mounted in a common casing (55) which is gas-tight with respect to the gas handled by the compressor unit, characterized in that the rotor and the driven shaft are connected via a flexible coupling (72; 72', 72") arranged in the casing.
- Compressor unit according to Claim 1, characterized in that the casing comprises multiple casing elements (55a, 55b) which are secured to one another in a leak-tight manner, each casing element enclosing the motor or a compressor.
- Compressor unit according to Claim 2, characterized in that the casing is provided with an opening (76) created between the adjacent casing elements to allow access to the flexible coupling, said opening being provided with leak-tight closure means (78).
- Compressor unit according to any one of Claims 1 to 3, characterized in that the flexible coupling (72; 72', 72") comprises an element chosen from among a diaphragm coupling, a flexible strip coupling and a twistable shaft coupling.
- Compressor unit according to any one of Claims 1 to 4, characterized in that each end of the driven shaft and of the rotor is supported by an end bearing (40, 42, 55, 56).
- Compressor unit according to Claim 5, characterized in that each end bearing (40, 42, 55, 56) is secured to the casing.
- Compressor unit according to one of Claims 5 and 6, characterized in that the end bearings are radial magnetic bearings.
- Compressor unit according to any one of Claims 1 to 7, characterized in that it comprises an axial thrust bearing (62) against which the driven shaft of the compressor bears during operation of the turbocompressor.
- Compressor unit according to Claim 8, characterized in that the axial thrust bearing (62) is a magnetic thrust bearing.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI200332488A SI1604115T1 (en) | 2003-03-10 | 2003-03-10 | Integrated centrifugal compressor unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/FR2003/000768 WO2004083644A1 (en) | 2003-03-10 | 2003-03-10 | Integrated centrifugal compressor unit |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1604115A1 EP1604115A1 (en) | 2005-12-14 |
EP1604115B1 true EP1604115B1 (en) | 2016-05-11 |
EP1604115B8 EP1604115B8 (en) | 2016-07-13 |
Family
ID=32982116
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03727579.9A Expired - Lifetime EP1604115B8 (en) | 2003-03-10 | 2003-03-10 | Integrated centrifugal compressor unit |
Country Status (9)
Country | Link |
---|---|
US (1) | US7144226B2 (en) |
EP (1) | EP1604115B8 (en) |
AU (1) | AU2003233369A1 (en) |
CY (1) | CY1117875T1 (en) |
ES (1) | ES2586658T3 (en) |
HU (1) | HUE029908T2 (en) |
NO (1) | NO339342B1 (en) |
SI (1) | SI1604115T1 (en) |
WO (1) | WO2004083644A1 (en) |
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- 2003-03-10 WO PCT/FR2003/000768 patent/WO2004083644A1/en not_active Application Discontinuation
- 2003-03-10 AU AU2003233369A patent/AU2003233369A1/en not_active Abandoned
- 2003-03-10 HU HUE03727579A patent/HUE029908T2/en unknown
- 2003-03-10 ES ES03727579.9T patent/ES2586658T3/en not_active Expired - Lifetime
- 2003-03-10 EP EP03727579.9A patent/EP1604115B8/en not_active Expired - Lifetime
- 2003-03-10 SI SI200332488A patent/SI1604115T1/en unknown
- 2003-04-11 US US10/411,239 patent/US7144226B2/en not_active Expired - Lifetime
-
2005
- 2005-09-09 NO NO20054198A patent/NO339342B1/en not_active IP Right Cessation
-
2016
- 2016-08-08 CY CY20161100774T patent/CY1117875T1/en unknown
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EP1604115A1 (en) | 2005-12-14 |
NO339342B1 (en) | 2016-11-28 |
SI1604115T1 (en) | 2016-10-28 |
WO2004083644A1 (en) | 2004-09-30 |
AU2003233369A1 (en) | 2004-10-11 |
NO20054198L (en) | 2005-10-07 |
CY1117875T1 (en) | 2017-05-17 |
ES2586658T3 (en) | 2016-10-18 |
US20040179961A1 (en) | 2004-09-16 |
NO20054198D0 (en) | 2005-09-09 |
US7144226B2 (en) | 2006-12-05 |
EP1604115B8 (en) | 2016-07-13 |
HUE029908T2 (en) | 2017-04-28 |
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