EP3052813B1 - Moteur turbo avec accouplement de torsion intégré à l'arbre entraînant et à l'arbre entraîné - Google Patents

Moteur turbo avec accouplement de torsion intégré à l'arbre entraînant et à l'arbre entraîné Download PDF

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Publication number
EP3052813B1
EP3052813B1 EP14780832.3A EP14780832A EP3052813B1 EP 3052813 B1 EP3052813 B1 EP 3052813B1 EP 14780832 A EP14780832 A EP 14780832A EP 3052813 B1 EP3052813 B1 EP 3052813B1
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EP
European Patent Office
Prior art keywords
shaft
driving
driven
coupling
torsional
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.)
Active
Application number
EP14780832.3A
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German (de)
English (en)
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EP3052813A1 (fr
Inventor
Guillaume JEVARDAT DE FOMBELLE
Dominique Fayard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thermodyn SAS
Original Assignee
Thermodyn SAS
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Publication date
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Publication of EP3052813A1 publication Critical patent/EP3052813A1/fr
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Classifications

    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/02—Blade-carrying members, e.g. rotors
    • F01D5/026—Shaft to shaft connections
    • 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
    • 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/043—Shafts
    • F04D29/044—Arrangements for joining or assembling shafts

Definitions

  • the invention relates to turbo engines, for example integrated motor-driven compressors.
  • turbo engines for example integrated motor-driven compressors.
  • a turbo alternator for example a turbo alternator.
  • US 3 368 743 A discloses a shaft construction in which two rigid shafts are interconnected by a relatively flexible intermediately located shaft part.
  • An integrated motor-driven compressor group comprises a leakproof housing which contains an engine, for example an electric motor, and a compressor group, for example a multi-stage unit, which comprises one or several wheels with blades for compression carried by a driven driven shaft and actuated by a driving driving shaft consisting of the rotor of the motor or actuated by the latter.
  • an engine for example an electric motor
  • a compressor group for example a multi-stage unit, which comprises one or several wheels with blades for compression carried by a driven driven shaft and actuated by a driving driving shaft consisting of the rotor of the motor or actuated by the latter.
  • One coupling solution for the driving shaft and the driven shaft consists in a coupling of the driven shaft and the driving shaft by means of a rigid coupling, with bearings provided for supporting the ends of the line of shafts of the motor-driven compressor group, as well as its median portion.
  • the currently used flexible couplings which are generally of the type with a membrane, increase the axial dimension of the motor-driven compressor group, typically of the order of 35 to 40 cm, compared to a rigid coupling with a flange.
  • they present a fragility zone because they can be subjected, for example, only to tensile or compression forces that are limited in the axial direction.
  • the gas feeding the compressor is extracted in full or in part after the compression stage and is used for cooling the motor.
  • the flow of the cooling gas in the motor takes place in the direction of the compressor.
  • the motor-driven compressor has a single abutment on the rotor of the compressor, on the opposite side of the coupling. Due to this fact, an axial thrust is generated in the motor and is absorbed by the coupling prior to being taken over by the axial abutment. Therefore, in order to alleviate these inconveniences, it has been proposed to use a torsional coupling placed in a hollow shaft of the compressor. Such a layout is described in the document FR 2 969 722 . Although it is effective in alleviating the inconveniences related to the use of a flexible coupling between the driving shaft and the driven shaft, such a layout complicates the structure of the shaft assembly.
  • the aim of the invention is to mitigate the inconveniences related to the layouts according to the state of the art and, in particular, to enable the axial efforts generated during the functioning of the levels of compression to be supported and this in a simple layout.
  • the object of the invention is a turbo engine comprising a driving shaft and a driven shaft actuated by the driving shaft being coupled driven to this driving shaft by means of a torsional coupling.
  • the torsional coupling is integrated into the driven and driving shafts which comprise a flexible zone in torsion so as to form the said torsional coupling.
  • This can be, for example, a motor-driven compressor group comprising a motor driving a compressor, comprising a set of wheels with blades for compression mounted on the driven shaft.
  • the set is mounted in a common housing which is impermeable to the gas generated by the motor-driven compressor group.
  • the shaft in which the torsional coupling is integrated, comprises, in addition, preferably, an external peripheral zone which constitutes a means for supporting the functions performed by the rotor.
  • This torsional zone existing in the driving and driven shafts, is formed by a cylindric part with a diameter that is smaller than the remaining part of the shaft in which the torsional coupling is integrated.
  • the shaft assembly comprises an internal shaft with reduced dimensions, through which the driving and driven shafts are coupled, permitting a localized deformation of the shaft assembly by the torsion.
  • the torsional cylindrical part can be entirely in projection starting from the shaft, into which the coupling is integrated, or can be partially or totally situated in the interior of a hollow part, in the form of a hollow shaft, enabling the hollow shaft to support one or several functions carried out by the rotor.
  • the torsional cylindrical part is located inside the hollow shaft, it is thus in cantilever around the torsional part. This solution can be realized eventually by means of a throat or by reducing the diameter and of the assembly.
  • the realization of the torsional part partially or completely inside a hollow part enables the length of the shaft assembly to be limited and thereby the dimensions, the weight and the cost of the turbo engine.
  • cylindrical part(s) can be obtained by using various techniques.
  • One embodiment comprises an axial cylindrical throat, which delimits in the said shaft another internal shaft which is coupled to the other driving or driven shaft and one external shaft.
  • the axial cylindrical throat is formed by means of electroerosion.
  • this torsional coupling is obtained by providing at the manufacturing stage a reduction of the diameter (for example by means of forging and by machining) in the driven and/or driving shaft.
  • At least one of the driven and driving shafts comprises in its torsional coupling zone one axial cylindrical throat delimited by an internal shaft and one external shaft assembled around the internal shaft.
  • the external shaft is extending till the connection zone of the driving and driven shafts.
  • the free end of the shaft, into which the torsional coupling is integrated at a diameter that is greater than the diameter of its median part forms a coupling zone of the said internal shaft with the other driving or driven shaft.
  • the free end of the shaft, to which the torsional coupling is integrated has a diameter that is less than those of the coupling zone corresponding to the other driving or driven shaft, with which it is coupled, forming a flange that ensures the coupling of the said driving or driven shafts.
  • a motor-driven compressor designated by the general reference G, comprises essentially a motor 1, for example an electric motor with high rotational speed, for example between 6,000 and 16,000 revolutions/minute, powered by a frequency converter and comprising a stator 2 and a rotor 3 forming a driving shaft for the motor-driven compressor group, and a compressor group 4 comprising a set of wheels with blades 5, 6 and 7, here three in number, mounted on the driven shaft 8.
  • the driven shaft 8 is supported by the radial bearings 9.
  • the arrangement is mounted on a base (not shown) and is located in a common casing 10, which is impermeable to the gas generated by the motor-driven compressor group.
  • the casing 10 comprises an input "INPUT”, through which the gas to be generated is drawn by suction into the compressor and an output "OUTPUT”, through which the compressed gas is delivered when it exits from the compressor group 4.
  • the compressor group 4 comprises three wheels with blades mounted on the driven shaft 8.
  • the compressor group 4 can comprise any number of such wheels with blades or comprise a different layout of wheels with blades.
  • the driven shaft 8 is equipped, at the level of its end zone, with a shoulder E, with which this shaft is bolted on the one end with respect to the driving shaft 3 of the motor 1.
  • the coupling between the driven shaft and the driving shaft consists of a torsional coupling.
  • This torsional coupling is obtained by the implementation in both the driven and driving shafts of a torsional zone, i.e. flexible in the rotation.
  • a torsional coupling is obtained by machining an axial cylindrical throat 11 in the driven shaft 8, in order to form in the driven shaft 8 an internal shaft 12, through which the driven shaft 8 is coupled to the driving shaft 3, and an external shaft 13, through which the driven shaft 8 is guided by the radial bearing 9.
  • the length of the throat will be selected in relation to the diameter of the shaft, in which it is mounted, with a length chosen in such a way as to confer to the coupling a torsional character.
  • the useful diameter of the shaft 8, which transmits the actuation efforts is locally reduced, and its resistance to torsional and radial deformations can be reduced, while retaining an important radial rigidity.
  • the driven shaft and in particular the internal shaft 12 remain notably capable of withstanding the axial force created during the operation of the wheels with compression blades 5, 6 and 7.
  • the presence of the torsional part enables because of the localized reduction of the useful section of the shaft assembly, the driven shaft 8 to be endowed with the characteristic that it can be deformed by bending and by elastic torsion so that on the one hand, defects in the angular alignment, on the one hand, and on the other lateral defects, on the other, between the driven shaft and the driving shaft can be compensated, either during the installation of the motor-driven compressor or while it is in operation.
  • This flexibility also enables the flexural vibrations between the driving shaft and the driven shaft to be filtered.
  • the torsional zone enables a gradation to be achieved of the efforts transmitted during the rapid changes of the torque transmitted by the motor or the resistive torque produced by the compressor.
  • the mounting is largely simplified since the shaft assembly is constituted simply by two portions of the shafts, namely the driving shaft and the driven shaft.
  • the torsional part is mounted in the driven shaft 8.
  • the driven shaft 8 comprises an external shaft 13, whose end is behind in relation to the free end of the internal shaft 12, with which this shaft 12 was fixed to the driving shaft 3.
  • the internal shaft 12 has a diameter that is smaller than the diameter of the end formed by the shoulder E.
  • the torsional coupling is obtained, as can be seen in figures 1 and 2 , by obtaining, at the manufacturing stage, for example by means of forging and by machining of the driven shaft 8, a localized reduction of the diameter in order to form the end zone 12 of the driven shaft of reduced diameter, the cylindrical throat being then realized in order to form the external shaft 13.
  • the torsional coupling obtained as shown in figures 1 and 2 , by arranging a throat in the driving shaft is - according to the invention - also formed by arranging this throat in the driving shaft, i.e. in the two shafts - driving and driven.
  • the external shaft 13 extends over a substantial part of the internal shaft 12, which here does not have an end shoulder. Therefore, the mounting of the internal shaft 12 on the end of the driving shaft 3 employs a flange 14 fixed by being bolted onto the free end of the driving shaft 3 and connected in rotation to the internal shaft 12.
  • Axial throat could be provided, for example, in the internal peripheral surface of the flange 14, destined to engage with the corresponding ribs mounted at the free end of the internal shaft 12.
  • a flange with a general conical form or endowed with an end shoulder as can be seen in figure 3 can be used.
  • the driving shaft 3 and the driven shaft 4 both have an axial cylindrical throat 11 and 11a.
  • the throat 11 is similar to the throat used in the embodiment in figure 3 .
  • the axial cylindrical throat 11 creates an internal shaft 12 and an external shaft 13 which are extended along a substantial part of the internal shaft 12, with this internal shaft 12 extending in a projection starting from the external shaft 13 along a length that is sufficient for the mounting of a flange 15.
  • the axial cylindrical throat 11a creates in this shaft 3, an internal shaft 16 and an external shaft 17 which are extended along a substantial part of the internal shaft 16, with the latter extending in a projection beyond the free end of the external shaft 17 along a length that is sufficient for the mounting of the flange 15.
  • the torsional zone of the shaft assembly is formed in the driving shaft 3 and in the driven shaft 8.
  • the shaft assembly comprises a torsional zone with increased length.
  • the implementation of the torsional zone consists, in particular, in the realization of the internal shaft within the driven shaft 8, through which the driven shaft 8 is coupled driven to the driving shaft 3, and of an external shaft 13, which is then assembled to the driven shaft 8 and through which the latter is guided by the radial bearing 9 in a way as to form a cylindrical throat between the two internal and external shafts.
  • the external shaft is assembled around the zone of the shaft which has a reduced diameter.
  • the hollow part can be assembled on the rotor, for example close to the torsional zone, for example by bolting and/or through the diameter of the abutment and/or by means of a toothed hirth and/or by using many other assembly modes.
  • the driven shaft comprises an internal shaft 12 and an external shaft 13
  • the external shaft can then be used for the implementation of functions carried out by the rotor.
  • a bearing support and/or a support of one or several wheel(s) with blade(s) can be realized ( figure 3 ).
  • the invention is not limited to what is described above. It is also possible, according to the invention, to arrange the axial cylindrical throat in the driving shaft and in the driven shaft and to make sure, regarding both the driving shaft and the driven shaft, that the distance between the ends of the shafts, namely between the ends of the two exterior shafts 13 and 17, is equal to half of the torsional length or, in other terms, to ensure that the length of the interior shaft, which extends outside the exterior shaft, is equal to the length of the exterior shaft, as described in the reference to figure 2 , both as regards the driving shaft and the driven shaft.
  • the torsional zone can be formed by the realization, during the manufacture of the driven shaft, of a zone 18 with diameter that is reduced in a such a way as to confer on the coupling a torsional character.
  • the coupling with the driving shaft can be realized both by providing a shoulder E at the end, as shown, or by using a fitted flange.
  • the reduced diameter zone can also be realized independently from the rest of the driven shaft and can be assembled, as previously indicated in the reference to the figures 2 to 4 , to the driven shaft.
  • the reduced diameter zone can be formed in the driving shaft or in the two driven and driving shafts. It is to be noted that, as shown in figures 1 to 4 , the length of the reduced diameter zone is chosen in relation to the diameter of this zone in a way as to confer a torsional character on the shaft.
  • the torsional zone can be realized over a length between 600 and 700 mm.
  • the axial cylindrical throat produced in the driven shaft and/or in the driving shaft can be formed by means of electroerosion or by EDM ("Electrical Discharge Machining" ), which is a machining procedure consisting in the removal of material in one piece by using electric discharges.
  • EDM Electro Discharge Machining

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Supercharger (AREA)

Claims (12)

  1. Turbomachine, comprenant un arbre d'entraînement (3) et un arbre entraîné (8) actionné par l'arbre d'entraînement, qui est accouplé à cet arbre d'entraînement au moyen d'un accouplement de torsion, dans laquelle l'accouplement de torsion est intégré dans au moins l'un des arbres entraîné et d'entraînement qui comprend une zone qui est flexible en rotation, de manière à constituer ledit accouplement de torsion, dans laquelle la zone flexible comprend une partie cylindrique (12, 16) avec un diamètre qui est inférieur au reste de l'arbre (3, 8) dans lequel l'accouplement flexible est intégré,
    caractérisé en ce que la partie cylindrique (12, 16) est montée dans l'arbre entraîné (8) et dans l'arbre d'entraînement (3).
  2. Turbomachine selon la revendication 1, dans laquelle l'arbre, dans lequel l'accouplement de torsion est intégré, comprend en outre une zone périphérique externe (13, 17), qui constitue un moyen de support aux fonctions réalisées par le rotor.
  3. Turbomachine selon la revendication 1 ou la revendication 2, dans laquelle la longueur de la partie cylindrique (12, 16) est choisie par rapport au diamètre de telle façon à conférer un caractère de torsion à l'accouplement.
  4. Turbomachine selon l'une quelconque des revendications précédentes, dans laquelle la partie cylindrique de torsion est entièrement en saillie à partir de l'arbre (3, 8) dans lequel l'accouplement est intégré.
  5. Turbomachine selon l'une quelconque des revendications précédentes, dans laquelle la partie cylindrique de torsion est partiellement ou complètement située à l'intérieur d'une partie creuse (13).
  6. Turbomachine selon l'une quelconque des revendications précédentes, dans laquelle au moins l'un des arbres entraîné et d'entraînement (3 ; 8) comprend dans sa zone d'accouplement de torsion une gorge cylindrique axiale (11, 11a) délimitant dans ledit arbre un arbre interne (12), qui est accouplé à l'autre arbre d'entraînement ou entraîné, et un arbre externe (13).
  7. Turbomachine selon la revendication 6, dans laquelle la gorge cylindrique axiale (11 ; 11a) est formée au moyen d'une électroérosion.
  8. Turbomachine selon l'une quelconque des revendications 1 à 5, dans laquelle au moins l'un des arbres entraîné et d'entraînement comprend dans sa zone d'accouplement de torsion une gorge cylindrique axiale (11, 11a) délimitée par un arbre interne (12) et un arbre externe (13) assemblé autour de l'arbre interne (12).
  9. Turbomachine selon l'une quelconque des revendications 6, 7 et 8, dépendant de la revendication 2, dans laquelle l'arbre externe (13) constitue ledit moyen de support pour les fonctions réalisées par le rotor.
  10. Turbomachine selon l'une quelconque des revendications 6, 7 et 8, dans laquelle l'arbre externe (13) est étendu jusqu'à la zone de liaison des arbres d'entraînement et entraîné.
  11. Turbomachine selon l'une quelconque des revendications 1 à 10, dans laquelle l'extrémité libre de l'arbre (12), dans laquelle l'accouplement de torsion est intégré, a un diamètre qui est supérieur à celui de sa partie médiane et forme une zone d'accouplement dudit arbre interne avec l'autre arbre d'entraînement ou entraîné.
  12. Turbomachine selon l'une quelconque des revendications 1 à 10, dans laquelle l'extrémité libre de l'arbre, dans laquelle l'accouplement de torsion est intégré, a un diamètre qui est inférieur à celui de la zone d'accouplement correspondant à l'autre arbre d'entraînement ou entraîné, avec lequel il est accouplé et dans lequel une bride (15) assure l'accouplement desdits arbres.
EP14780832.3A 2013-10-02 2014-10-01 Moteur turbo avec accouplement de torsion intégré à l'arbre entraînant et à l'arbre entraîné Active EP3052813B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1359553A FR3011291B1 (fr) 2013-10-02 2013-10-02 Turbomachine a accouplement torsible integre a au moins un arbre menant et/ou mene
PCT/EP2014/071057 WO2015049295A1 (fr) 2013-10-02 2014-10-01 Moteur turbo doté d'un couplage par torsion intégré à au moins un entraînement ou entraînement d'arbre entraîné

Publications (2)

Publication Number Publication Date
EP3052813A1 EP3052813A1 (fr) 2016-08-10
EP3052813B1 true EP3052813B1 (fr) 2023-07-19

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ID=49911669

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14780832.3A Active EP3052813B1 (fr) 2013-10-02 2014-10-01 Moteur turbo avec accouplement de torsion intégré à l'arbre entraînant et à l'arbre entraîné

Country Status (10)

Country Link
US (1) US20160245088A1 (fr)
EP (1) EP3052813B1 (fr)
JP (2) JP2016532805A (fr)
KR (1) KR102266201B1 (fr)
CN (1) CN105593530A (fr)
BR (1) BR112016005995B1 (fr)
CA (1) CA2925413C (fr)
FR (1) FR3011291B1 (fr)
MX (1) MX2016004281A (fr)
WO (1) WO2015049295A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7429541B2 (ja) * 2020-01-06 2024-02-08 三菱重工コンプレッサ株式会社 圧縮機システム
US11454140B1 (en) 2021-11-09 2022-09-27 Borgwarner Inc. Torque-limiting rotor coupling for an electrically-actuated camshaft phaser
US11454141B1 (en) 2021-11-09 2022-09-27 Borgwarner Inc. Torque limited variable camshaft timing assembly
US11940030B1 (en) 2022-10-24 2024-03-26 Borgwarner Inc. Torque-limiting torsion gimbal

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
FR1440721A (fr) * 1965-04-12 1966-06-03 Cem Comp Electro Mec Perfectionnement aux arbres pour machines tournantes
DE1628779A1 (de) * 1966-05-11 1970-07-02 Siemens Elektrogeraete Gmbh Laugenpumpe,insbesondere fuer Wasch- oder Geschirrspuelmaschinen
JP3116233B2 (ja) * 1990-05-17 2000-12-11 三信工業株式会社 船舶推進機のスラスト受構造
ITMI20051518A1 (it) * 2005-08-02 2007-02-03 Nuovo Pignone Spa Sistema per l'elettroerosione per la realizzazione di una cava o i un foro sagomato in un particolare
JP5150346B2 (ja) * 2008-04-16 2013-02-20 泉陽興業株式会社 観覧車
CN201236832Y (zh) * 2008-08-06 2009-05-13 杨怀庆 家用微型软轴泵
JP5660803B2 (ja) * 2009-08-17 2015-01-28 Ｊｆｅシビル株式会社 鋼管ポールの接合構造及びこれによって接合された鋼管ポール
CN201739213U (zh) * 2010-07-16 2011-02-09 潘海龙 软轴离心式潜水泵
FR2966528B1 (fr) * 2010-10-25 2016-12-30 Thermodyn Groupe compresseur centrifuge
FR2969722B1 (fr) * 2010-12-22 2013-01-04 Thermodyn Groupe motocompresseur a accouplement torsible place dans un arbre creux du compresseur

Also Published As

Publication number Publication date
BR112016005995B1 (pt) 2022-03-03
MX2016004281A (es) 2016-10-12
JP2020112161A (ja) 2020-07-27
CA2925413C (fr) 2022-08-02
WO2015049295A1 (fr) 2015-04-09
BR112016005995A2 (pt) 2017-08-01
FR3011291A1 (fr) 2015-04-03
CA2925413A1 (fr) 2015-04-09
US20160245088A1 (en) 2016-08-25
FR3011291B1 (fr) 2015-10-16
EP3052813A1 (fr) 2016-08-10
KR20160060752A (ko) 2016-05-30
KR102266201B1 (ko) 2021-06-18
CN105593530A (zh) 2016-05-18
JP2016532805A (ja) 2016-10-20

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