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EP3121449B1 - Compresseur centrifuge sous-marin avec arbre horizontal et avec un seul palier de poussée axiale - Google Patents

Compresseur centrifuge sous-marin avec arbre horizontal et avec un seul palier de poussée axiale Download PDF

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Publication number
EP3121449B1
EP3121449B1 EP15306191.6A EP15306191A EP3121449B1 EP 3121449 B1 EP3121449 B1 EP 3121449B1 EP 15306191 A EP15306191 A EP 15306191A EP 3121449 B1 EP3121449 B1 EP 3121449B1
Authority
EP
European Patent Office
Prior art keywords
compressor
motor
rotor
shaft
compressor unit
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
EP15306191.6A
Other languages
German (de)
English (en)
Other versions
EP3121449A1 (fr
Inventor
Massimo Camatti
Pierre Laboube
Roberto Esposito
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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Thermodyn SAS filed Critical Thermodyn SAS
Priority to EP15306191.6A priority Critical patent/EP3121449B1/fr
Priority to US15/745,514 priority patent/US20180209434A1/en
Priority to PCT/EP2016/067438 priority patent/WO2017013218A1/fr
Priority to AU2016295175A priority patent/AU2016295175B2/en
Publication of EP3121449A1 publication Critical patent/EP3121449A1/fr
Application granted granted Critical
Publication of EP3121449B1 publication Critical patent/EP3121449B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04D29/051—Axial thrust balancing
    • 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
    • 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
    • F04D25/0686—Units comprising pumps and their driving means the pump being electrically driven specially adapted for submerged use
    • 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
    • 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
    • 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
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/102—Shaft sealings especially adapted for elastic fluid pumps
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • 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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system
    • 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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
    • F04D29/5826—Cooling at least part of the working fluid in a heat exchanger

Definitions

  • the present invention relates to a turbocompressor or a motor compressor, and particularly to an integrated motor compressor unit.
  • the present invention relates to a motor compressor unit for subsea applications.
  • Motor compressor units of the integrated type comprise a motor means, generally an electric drive motor, and a compressor having one or more compression stages, depending on the applications, the motor means and the compressor being mounted in a common casing that is sealed against the gas handled by the compressor unit.
  • Each compression stage comprises a bladed impeller mounted on a shaft driven by a rotor, which is driven by the motor means.
  • the motor compressor when used under special operating conditions, especially for underwater operations, is usually arranged vertically to facilitate draining of the interior of the casing.
  • a compressor unit of this type is already known from US 2009/0 220 362 in which, in addition, the shaft of the compressor and the rotor driven by the motor means are coupled to form one common shaft that rotates around a vertical axis.
  • the shaft and the rotor are coupled using a twistable shaft that transmits the rotational moments between the motor means and the compressor and, as far as possible, mutually decouples the driven shaft and the rotor from vibrations.
  • the pressure difference on the opposite sides of the compression stages generate a thrust on the compressor that is transmitted via the twistable coupling to the rotor and to a thrust bearing provided at one end of the common shaft, namely on the upper end of the of the motor rotor.
  • the common shaft being arranged vertically, only one common thrust bearing is required for the motor and the compressor.
  • the thrust is directed in opposition to the weight forces of the common shaft, including the twistable coupling and the compression stages, such that a thrust balance is in addition carried out by the weight of the common shaft.
  • This problem may in particular incur at high loads, due to a thermal expansion of the compressor shaft driven by the motor means and may arise for compressor units having a high pressure ratio, namely above 3, and having an increased number of compression stages, equal or higher than 3.
  • motor compressor units having a common casing in which are mounted a compressor having one or several compression stages mounted on a compressor shaft and a motor having a rotor driving the shaft of the compressor around a vertical axis, and in which the compressor shaft and the rotor are assembled together using a rigid coupling to form a common shaft supported by three radial bearings.
  • Such an arrangement does not permit, however, to increase the number of the compression stages such that the motor compressor unit cannot be equipped with more than three compression stages.
  • one object of the present invention is to alleviate the above-mentioned drawbacks of the motor compressor units according to the state of the art.
  • a further purpose of the present invention is to provide a centrifugal compressor unit for subsea applications in which the problem of axial displacement of the bladed wheels mounted on the compressor shaft are overcome.
  • the invention thus proposes a subsea centrifugal compressor unit according to claim 1.
  • the rotor and the driven shaft form one common shaft, said compressor unit having a set of three radial bearings for supporting said shaft, said set of radial bearings comprising two bearings being provided on the motor side and one bearing being provided on the compressor side.
  • the rotor and the driven shaft are connected by means of a flexible coupling that is tortionally flexible and axially unflexible, the compressor unit further comprising a set of four radial bearings for supporting each end of the rotor and the driven shaft.
  • the bearings namely the axial bearing and the radial bearings for supporting the driven shaft or the rotor are magnetic bearings.
  • a gas cooler is part of a closed loop extending partly outside the casing.
  • the casing of the subsea centrifugal compressor unit according to the claimed invention may be pressurized.
  • FIG. 1 shows a centrifugal compressor unit 1 which is not according to the invention, for subsea applications, having a motor 2 and one or more compressor(s) 3 mounted in a common casing 4 leak tight to the gas manipulated by the compressor 3.
  • the casing 4 comprises two casing elements fixed together by appropriate attachment means, the one, denoted by numeral reference 5, accommodating the motor 2 and the other, denoted by reference 6, accommodating the compressor.
  • the casing elements are intended to provide support and protection for the motor and the compressor, respectively.
  • the casing 2 is provided with a gas inlet orifice I facing the first compression stage of the compressor and an outlet orifice O facing the last compression stage.
  • the casing element assembly is intended to be pressurized and immersed and is arranged on a base such that the compressor unit is arranged horizontally.
  • the motor 2 is formed by an electric motor, for example a high rotation speed motor (6000 to 16 000 rpm) supplied by a frequency variator and comprising a stator 7 and a rotor 8 supported by two radial end radial bearings 9 and 10.
  • a high rotation speed motor (6000 to 16 000 rpm) supplied by a frequency variator and comprising a stator 7 and a rotor 8 supported by two radial end radial bearings 9 and 10.
  • the compressor 3 comprises a shaft 11 driven by the motor rotor and supported by a set of two radial end bearings 12 and 13 and a set of bladed wheels 14 mounted on the driven shaft and defining each a compression stage for the compressor.
  • the bearings are rigidly fixed to the casing and are formed by active magnetic bearings that are controlled such that they can adapt to the dynamic behavior of the rotor or the driven shaft that they support.
  • the rotor 8 and the driven shaft 11 are linked via a flexible coupling that is radially flexible and axially unflexible to dynamically reduce the amplitude of the noise generated by ventilation when the compressor is rotated while efficiently propagating an axial thrust generated by the bladed wheels to the rotor of the motor.
  • the pressure differences generated at each compression stage generate a thrust on the driven shaft which is transmitted to an axial thrust bearing 16, for example an axial active magnetic bearing that is provided at the free end of the driven shaft 11, namely at the end opposite to the rotor of the motor 2.
  • the axial bearing 16 is located on the compressor side, namely as close as possible to the active portion of the compressor shaft such that the axial bearing 16 is more appropriate to compensate for the thermal expansion of the shaft and to more accurately guarantee the axial position of the driven shaft and of the rotating bladed wheels within the second casing element 6.
  • each of the rotor and the driven shaft can keep it on vibration behavior while the thrust generated during operation of the completion stages is supported by one first bearing only provided on the compressor side of the compressor unit.
  • the compressor unit may comprise a large number of compression stages, namely above 3, and provide a high pressure ratio, namely above 3.
  • such a subsea compressor unit may provide a pressure between 80 and 150 bars.
  • the compressor may comprise up to 8 compression stages and provide a pressure ratio up to 3 or 3,5.
  • the subsea centrifugal compressor unit is provided with cooling means for cooling the motor as well as the bearings.
  • the subsea compressor unit may be provided with a cooling system having a cooling loop lying between the first compression stage and one side of the motor opposite to the compressor or, alternatively but not according to the invention, flying between both sides of the rotor, as illustrated, to provide cooling in closed loop.
  • the cooling system comprises a gas cooler 18 lying outside the casing 2 and therefore in a contact with the cold deep water at constant temperature.
  • the cooling means is arranged as an open loop with a clean gas supply 19 entering the first casing element 2 at one side of the rotor opposite to the compressor.
  • the rotor is provided with an additional bladed wheel 20 such that the clean gas supply is directed to the motor, through the radial bearing 9 and to the compressor through a barrier seal 21 provided between the flexible coupling 15 and the compressor.
  • an additional axial thrust bearing 17 may be used, in such a case, to compensate for the thrust generated by the motor internal pressure drop to the cooling flow.
  • the compressor unit comprises a rotor and a shaft supporting the compression stages that are linked using a flexible coupling and having four radial bearings for supporting the respective free ends of the rotor and of the driven shaft.
  • the compressor unit may comprise a common rigid shaft or a rotor and a stator that are linked using a rigid coupling, namely a coupling that is axially and tortionally unflexible.
  • the common shaft may be supported by two radial bearings on the motor side and by one radial bearing at the compressor side, with one axial bearing only.
  • This arrangement also permits to have a large number of compression stages, namely above 3, and provide a high pressure ratio, for example above 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Electromagnetism (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (5)

  1. Unité de compresseur centrifuge sous-marin, comprenant :
    - un moteur (2) ayant un rotor (8),
    - au moins un compresseur (3) ayant un arbre (11) entraîné par le rotor ; et
    - un ensemble de roues à aubes (14) fixées sur l'arbre entraîné,
    ledit moteur et ledit compresseur étant montés dans un boîtier étanche commun (2) comprenant un premier élément de boîtier recevant le moteur et un second élément de boîtier recevant le compresseur, et étant en outre pourvus de moyens de refroidissement pour refroidir le moteur et les paliers de l'unité de compresseur centrifuge sous-marin, dans laquelle,
    en fonctionnement, le moteur, le compresseur et le boîtier ayant le moteur et le compresseur sont agencés horizontalement, et l'unité de compresseur comprend en outre un palier de butée axial uniquement (16) sur un côté compresseur, dans laquelle lesdits moyens de refroidissement sont agencés en boucle ouverte incluant une alimentation en gaz propre (19) pénétrant dans le premier élément de boîtier d'un côté du rotor opposé au compresseur, une roue à aubes supplémentaire (20) pourvue sur le rotor (8) pour diriger l'alimentation en gaz propre vers le moteur (2), à travers un premier palier radial (9) supportant une extrémité du rotor (8) et vers le compresseur (3) à travers un joint (21) de l'unité de compresseur centrifuge sous-marin, le joint (21) étant entre le moteur, en aval des moyens de refroidissement, et le compresseur.
  2. Unité de compresseur centrifuge sous-marin selon la revendication 1 dans laquelle le rotor et l'arbre entraîné forment un arbre commun, ladite unité de compresseur ayant un ensemble de trois paliers radiaux pour supporter ledit arbre, deux paliers étant pourvus sur le côté moteur et un palier étant pourvu sur le côté compresseur.
  3. Unité de compresseur centrifuge sous-marin selon la revendication 1, dans laquelle le rotor et l'arbre entraîné sont reliés au moyen d'un accouplement flexible (15) qui est flexible en torsion et axialement non flexible, et comprenant en outre un ensemble de quatre paliers radiaux (9, 10, 12, 13) incluant le premier palier radial pour supporter chaque extrémité du rotor et de l'arbre entraîné.
  4. Unité de compresseur centrifuge sous-marin selon la revendication 2 ou 3, dans laquelle les paliers radiaux pour supporter l'arbre entraîné ou le rotor sont des paliers magnétiques.
  5. Unité de compresseur centrifuge sous-marin selon l'une quelconque des revendications 1 à 4, dans laquelle le palier axial est un palier magnétique.
EP15306191.6A 2015-07-22 2015-07-22 Compresseur centrifuge sous-marin avec arbre horizontal et avec un seul palier de poussée axiale Active EP3121449B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP15306191.6A EP3121449B1 (fr) 2015-07-22 2015-07-22 Compresseur centrifuge sous-marin avec arbre horizontal et avec un seul palier de poussée axiale
US15/745,514 US20180209434A1 (en) 2015-07-22 2016-07-21 Subsea centrifugal compressor with horizontal shaft and with only one axial thrust bearing
PCT/EP2016/067438 WO2017013218A1 (fr) 2015-07-22 2016-07-21 Compresseur centrifuge sous-marin avec arbre horizontal et avec un seul palier de butée axial
AU2016295175A AU2016295175B2 (en) 2015-07-22 2016-07-21 Subsea centrifugal compressor with horizontal shaft and with only one axial thrust bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15306191.6A EP3121449B1 (fr) 2015-07-22 2015-07-22 Compresseur centrifuge sous-marin avec arbre horizontal et avec un seul palier de poussée axiale

Publications (2)

Publication Number Publication Date
EP3121449A1 EP3121449A1 (fr) 2017-01-25
EP3121449B1 true EP3121449B1 (fr) 2022-10-05

Family

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Family Applications (1)

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EP15306191.6A Active EP3121449B1 (fr) 2015-07-22 2015-07-22 Compresseur centrifuge sous-marin avec arbre horizontal et avec un seul palier de poussée axiale

Country Status (4)

Country Link
US (1) US20180209434A1 (fr)
EP (1) EP3121449B1 (fr)
AU (1) AU2016295175B2 (fr)
WO (1) WO2017013218A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2691706C2 (ru) * 2017-05-22 2019-06-17 Игорь Викторович Лентов Способ работы многоступенчатых осевых машин
EP3617519A1 (fr) * 2018-08-27 2020-03-04 Siemens Aktiengesellschaft Rotor de compresseur radial, compresseur radial, compresseur à engrenage
FR3088686B1 (fr) * 2018-11-21 2021-10-01 Thermodyn Motocompresseur a plusieurs sections de compression
IT201900003077A1 (it) * 2019-03-04 2020-09-04 Nuovo Pignone Tecnologie Srl Configurazione di turbomacchina compressore-espantore multistadio
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
EP3890163A1 (fr) * 2020-04-01 2021-10-06 GE Energy Power Conversion Technology Ltd. Procede de dimensionnement d'un rotor a arbre non traversant, rotor et motocompresseur associes
US20220010734A1 (en) * 2020-07-08 2022-01-13 Ge Energy Power Conversion Technology Limited Mechanical drive system and associated motor compressor
FI129999B (en) * 2020-10-05 2022-12-15 Lappeenrannan Lahden Teknillinen Yliopisto Lut The connecting element and the electromechanical system containing it
CN113676014B (zh) * 2021-07-27 2025-10-03 鑫磊压缩机股份有限公司 一种通过磁性联轴器连接磁悬浮电机驱动的mcl压缩系统
GB202115352D0 (en) 2021-10-26 2021-12-08 Rolls Royce Plc Cabin blower system

Citations (3)

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Publication number Priority date Publication date Assignee Title
US6455964B1 (en) * 1998-12-24 2002-09-24 Honeywell International Inc. Microturbine cooling system
US20100014990A1 (en) * 2006-03-24 2010-01-21 Theo Nijhuis Compressor Unit
US20130315755A1 (en) * 2012-05-23 2013-11-28 Ilia Oxman Temperature control system for a machine and methods of operating same

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DE3729486C1 (de) * 1987-09-03 1988-12-15 Gutehoffnungshuette Man Kompressoreinheit
EP1074746B1 (fr) * 1999-07-16 2005-05-18 Man Turbo Ag Turbo-compresseur
HUE029908T2 (hu) * 2003-03-10 2017-04-28 Thermodyn Centrifugálkompresszor egység
ES2347709T3 (es) 2006-02-03 2010-11-03 Siemens Aktiengesellschaft Unidad de compresor.
US9206819B2 (en) * 2011-06-01 2015-12-08 Dresser-Rand Company Subsea motor-compressor cooling system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6455964B1 (en) * 1998-12-24 2002-09-24 Honeywell International Inc. Microturbine cooling system
US20100014990A1 (en) * 2006-03-24 2010-01-21 Theo Nijhuis Compressor Unit
US20130315755A1 (en) * 2012-05-23 2013-11-28 Ilia Oxman Temperature control system for a machine and methods of operating same

Also Published As

Publication number Publication date
AU2016295175B2 (en) 2020-07-02
US20180209434A1 (en) 2018-07-26
AU2016295175A1 (en) 2018-01-25
WO2017013218A1 (fr) 2017-01-26
EP3121449A1 (fr) 2017-01-25

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