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WO2017013218A1 - Compresseur centrifuge sous-marin avec arbre horizontal et avec un seul palier de butée axial - Google Patents

Compresseur centrifuge sous-marin avec arbre horizontal et avec un seul palier de butée axial Download PDF

Info

Publication number
WO2017013218A1
WO2017013218A1 PCT/EP2016/067438 EP2016067438W WO2017013218A1 WO 2017013218 A1 WO2017013218 A1 WO 2017013218A1 EP 2016067438 W EP2016067438 W EP 2016067438W WO 2017013218 A1 WO2017013218 A1 WO 2017013218A1
Authority
WO
WIPO (PCT)
Prior art keywords
compressor
motor
rotor
shaft
casing
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.)
Ceased
Application number
PCT/EP2016/067438
Other languages
English (en)
Inventor
Pierre Georges LABOUBE
Massimo Camatti
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 US15/745,514 priority Critical patent/US20180209434A1/en
Priority to AU2016295175A priority patent/AU2016295175B2/en
Publication of WO2017013218A1 publication Critical patent/WO2017013218A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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 o f 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 o f the interior of the casing.
  • a compressor unit o f this type is already known from US 2009/0 220 362 in which, in addition, the shaft o f 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 o f 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 o f 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 o f 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 type o f arrangement in which the rotor is axially supported by one thrust bearing has the disadvantage that the coupling between the rotor of the motor and the compressor shaft may be prejudicial to the accuracy of the axial position of the rotating elements o f the compressor which may impact the motor compressor efficiency, in particular during transient phases .
  • This problem may in particular incur at high loads, due to a thermal expansion o f 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 o f compression stages, equal or higher than 3.
  • one obj ect 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 app lications in which the problem o f axial displacement of the bladed wheels mounted on the compressor shaft are overcome.
  • the invention thus proposes a subsea centrifugal compressor unit, comprising :
  • At least one compressor having a shaft driven by the rotor, and -a set of bladed wheels fitted on the driven shaft.
  • the motor, the compressor and the casing having the motor and the compressor are arranged horizontally, one axial thrust bearing only being in addition provided on a compressor side .
  • the rotor and the driven shaft form one common shaft, said compressor unit having a set o f 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 o f 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 o f 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 .
  • the gas cooler is part of a closed loop extending partly outside the casing.
  • a seal may be provided between the motor, downstream the cooling means, and the compressor.
  • the casing is pressurized.
  • - Figure 2 illustrates a further aspect of a centrifugal compressor unit according to one embodiment of the invention.
  • FIG. 1 shows a centrifugal compressor unit 1 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, accommo dating 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 examp le 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 1 1 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 1 1 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 1 6, for example an axial active magnetic bearing that is provided at the free end o f the driven shaft 1 1 , 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 o f the active portion o f the compressor shaft such that the axial bearing 16 is more appropriate to compensate for the thermal expansion o f 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 o f 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. It has been noted that 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 may be 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 o f the motor opposite to the compressor or lying between a both sides of the rotor, as illustrated, to provide cooling in closed loop .
  • the cooling system comprises a gas coo ler 1 8 lying outside the casing 2 and therefore in a contact with the co ld deep water at constant temperature.
  • the cooling means may be arranged as an open loop with a clean gas supp ly 19 entering the first casing element 2 at one side of the rotor opposite to the compressor.
  • the rotor may be 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 1 5 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 invention is not limited to the disclo sed embodiment.
  • 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 o f 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)

Abstract

L'invention concerne une unité de compresseur centrifuge comprenant : un moteur (2) muni d'un rotor (8), au moins un compresseur (3) muni d'un arbre (11) entraîné par le rotor; et un ensemble de roues à ailettes (14) montées sur l'arbre entraîné, ledit moteur et ledit compresseur étant montés dans un boîtier étanche à l'eau (2) commun. Il comprend en outre des moyens de refroidissement destinés à refroidir le moteur, lesdits moyens de refroidissement possédant un refroidisseur à gaz à l'extérieur dudit boîtier. En fonctionnement, le moteur, le compresseur et le boîtier dans lequel se trouvent le moteur et le compresseur sont disposés horizontalement, un seul palier de butée axial (16) étant présent sur un côté compresseur.
PCT/EP2016/067438 2015-07-22 2016-07-21 Compresseur centrifuge sous-marin avec arbre horizontal et avec un seul palier de butée axial Ceased WO2017013218A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US15/745,514 US20180209434A1 (en) 2015-07-22 2016-07-21 Subsea centrifugal compressor with horizontal shaft and with only one axial thrust bearing
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 (2)

Application Number Priority Date Filing Date Title
EP15306191.6 2015-07-22
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 (1)

Publication Number Publication Date
WO2017013218A1 true WO2017013218A1 (fr) 2017-01-26

Family

ID=54150356

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/067438 Ceased WO2017013218A1 (fr) 2015-07-22 2016-07-21 Compresseur centrifuge sous-marin avec arbre horizontal et avec un seul palier de butée axial

Country Status (4)

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

Cited By (3)

* 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
FR3088686A1 (fr) * 2018-11-21 2020-05-22 Thermodyn Motocompresseur a plusieurs sections de compression
RU2779733C1 (ru) * 2018-11-21 2022-09-12 Термодин САС Компрессор с множеством валов и консольной ступенью сжатия

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3617519A1 (fr) 2018-08-27 2020-03-04 Siemens Aktiengesellschaft Rotor de compresseur radial, compresseur radial, compresseur à engrenage
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

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US4969803A (en) * 1987-09-03 1990-11-13 Man Gutehoffnungshutte Gmbh Compressor unit
US6464469B1 (en) * 1999-07-16 2002-10-15 Man Turbomaschinen Ag Ghh Borsig Cooling system for electromagnetic bearings of a turbocompressor
US20040179961A1 (en) * 2003-03-10 2004-09-16 Jean-Marc Pugnet Integrated compressor unit
WO2012166438A2 (fr) * 2011-06-01 2012-12-06 Dresser-Rand Company Système de refroidissement de moteur-compresseur sous-marin

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US6246138B1 (en) * 1998-12-24 2001-06-12 Honeywell International Inc. Microturbine cooling system
EP1979622B1 (fr) 2006-02-03 2010-07-07 Siemens Aktiengesellschaft Unite de compresseur
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4969803A (en) * 1987-09-03 1990-11-13 Man Gutehoffnungshutte Gmbh Compressor unit
US6464469B1 (en) * 1999-07-16 2002-10-15 Man Turbomaschinen Ag Ghh Borsig Cooling system for electromagnetic bearings of a turbocompressor
US20040179961A1 (en) * 2003-03-10 2004-09-16 Jean-Marc Pugnet Integrated compressor unit
WO2012166438A2 (fr) * 2011-06-01 2012-12-06 Dresser-Rand Company Système de refroidissement de moteur-compresseur sous-marin

Cited By (7)

* 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
FR3088686A1 (fr) * 2018-11-21 2020-05-22 Thermodyn Motocompresseur a plusieurs sections de compression
WO2020104062A1 (fr) * 2018-11-21 2020-05-28 Thermodyn Compresseur avec arbres multiples et un étage de compression en cantilever
JP2022507717A (ja) * 2018-11-21 2022-01-18 サーモダイン・エスエイエス 複数の軸及び片持ち圧縮段階を有する圧縮機
RU2779733C1 (ru) * 2018-11-21 2022-09-12 Термодин САС Компрессор с множеством валов и консольной ступенью сжатия
JP7257513B2 (ja) 2018-11-21 2023-04-13 サーモダイン・エスエイエス 複数の軸及び片持ち圧縮段階を有する圧縮機
US11898566B2 (en) 2018-11-21 2024-02-13 Nuovo Pignone Technolgie Srl Motor-driven compressor having a compression section mounted on a free end of a cantilvered shaft

Also Published As

Publication number Publication date
AU2016295175A1 (en) 2018-01-25
AU2016295175B2 (en) 2020-07-02
EP3121449A1 (fr) 2017-01-25
US20180209434A1 (en) 2018-07-26
EP3121449B1 (fr) 2022-10-05

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