EP2853749A1 - Machine à énergie fluide, procédé pour fonctionner - Google Patents

Machine à énergie fluide, procédé pour fonctionner Download PDF

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Publication number
EP2853749A1
EP2853749A1 EP13185932.4A EP13185932A EP2853749A1 EP 2853749 A1 EP2853749 A1 EP 2853749A1 EP 13185932 A EP13185932 A EP 13185932A EP 2853749 A1 EP2853749 A1 EP 2853749A1
Authority
EP
European Patent Office
Prior art keywords
fluid
rotor
seal
energy
machine
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.)
Withdrawn
Application number
EP13185932.4A
Other languages
German (de)
English (en)
Inventor
Claus Smits Hansen
Joergen Lyquist
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to EP13185932.4A priority Critical patent/EP2853749A1/fr
Priority to PCT/EP2014/068365 priority patent/WO2015043877A1/fr
Publication of EP2853749A1 publication Critical patent/EP2853749A1/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • 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
    • F04D29/104—Shaft sealings especially adapted for elastic fluid pumps the sealing fluid being other than the working fluid or being the working fluid treated
    • 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

Definitions

  • the invention relates to a fluid-energy-machine comprising at least one first rotor contacting a process fluid to exchange kinetic energy between the process fluid and the first rotor, further comprising an electric motor drive driving the first rotor, further comprising a shaft seal, sealing to said first rotor comprising a seal fluid supply upstream said shaft seal and a seal fluid exhaust downstream said shaft seal.
  • Fluid-energy-machines are widely used to pump or compress fluids as well as to generate energy from a fluid pressure difference. While the preferred application of the invention relates to the first above option to compress or pump a fluid the invention is generally applicable also to energy generation.
  • the invention is specifically aimed to turbo machinery equipment and not to fluid displacement machines involving a piston.
  • Most fluid-energy-machines or fluid displacement machines comprise a shaft seal if they are built as turbo machinery. That shaft seal conventionally is necessary to seal off said fluid to be processed from the ambience or surrounding machine components. Said shaft seals might be used to minimize pressure loss by leakage to reserve the maximum pressure difference for the process. Said shaft seals are also useful to seal off a potentially dangerous fluid since process fluids may be toxic or explosive.
  • the preferred known method of shaft sealing involves a sealing fluid, in most cases a sealing gas or barrier gas.
  • a sealing gas or barrier gas Commonly a conventional labyrinth seal is used to minimize the fluid passing the gap between a rotor and a stator. The fluid leakage passing a labyrinth is blocked off by said sealing gas or barrier gas which has at least a slightly higher pressure than the pressure of the process fluid being compressed or expanded in said fluid-energy-machine. Often in the middle of a labyrinth seal of a shaft sealing said seal gas supply joins into the gap between the stator and the rotor.
  • said seal gas Downstream the passage of said seal gas between said stator and said rotor through said labyrinth seal said seal gas is at least partly drained away by a seal gas exhaust.
  • said seal gas splits into two portions when entering said labyrinth seal and passes said labyrinth seal in two opposite axial directions. At least one of these two portions normally is conducted away by said seal gas exhaust and might be processed further in other downstream processes or simply let into the atmosphere, maybe burned in a flair gas flame if said seal gas is combustible.
  • an essential feature of the invention is the re-use of the barrier gas respectively shaft seal gas from shaft sealing to cool said electric motor drive, which is preferably a high speed motor, and therefore avoid an external air supply or seal gas supply for cooling of this component.
  • This elimination of seal fluid loss avoids emission and increases the overall efficiency.
  • the design of the machine is simplified since a cooling fluid supply for the drive doesn't need to be a further separate module. This simplification synergistically leads to a higher availability of the machine since less components can cause a failure of the fluid-energy-machine.
  • One preferred embodiment of the invention is provided by a design of said seal fluids exhaust conducting said seal fluid into a gap between a motor-stator and a motor-rotor for cooling the electric motor drive.
  • This motor cooling design is as simple as effective.
  • Another preferred embodiment provides a direct driven first rotor wherein said first rotor and said motor-rotor extend along one common axis.
  • a preferred design in this case is that said motor-rotor is made as one piece of material with a shaft of said first rotor and an impeller is directly mounted to that shaft to exchange kinetic energy between said process fluid and said impeller. Said impeller might be shrink-fitted to said shaft.
  • said fluid-energy-machine being a centrifugal compressor wherein said first rotor is a compressor rotor preferably comprising an impeller mounted to an impeller shaft.
  • Still another preferred embodiment of said fluid-energy-machine comprises an axial inlet for said process fluid, wherein said compressor first rotor is directly mounted to said motor-rotor.
  • Still another preferred embodiment of said fluid-energy-machine is provided by said shaft seal being positioned between said first rotor and said motor-rotor. This way said electric motor drive can be sealed off from said process fluid by said shaft seal.
  • Figure 1 shows a fluid-energy-machine FEM according to the invention comprising one first rotor R of a compressor CO respectively a compressor rotor COR contacting a process fluid PF to exchange kinetic energy between the process fluid PF and said first rotor R. Further said fluid-energy-machine FEM comprises an electric motor drive ED driving said first rotor R. Said fluid-energy-machine FEM further comprises a shaft seal SHS between said compressor CO and said motor drive ED to avoid process fluid entering said motor drive ED.
  • Said shaft seal SHS comprises a labyrinth seal extending along an axis X of said compressor first rotor COR respectively said motor-rotor MR.
  • the seal fluid supply SFS supplies compressed seal fluid (of higher pressure than the pressure of said process fluid downstream of the compression) into said shaft seal SHS to avoid that process fluid PF enters respectively passes said labyrinth LS.
  • Said seal fluid SF leaves said shaft seal SHS into both axial directions, wherein on the side of the electric drive ED said seal fluid SF enters a seal fluid exhaust SFE. To reduce seal fluid consumption the seal fluid SF pressure is adjusted only slightly higher than the process fluid PF maximum pressure.
  • Said seal fluid exhaust SFE conducts said seal fluid SF into a cooling system CS of said motor drive ED. That way said seal fluid SF is reused as a cooling fluid of said cooling system CS by entering a gap GP between a motor-rotor MR and a motor-stator MS of said motor drive ED.
  • Said first rotor R of said fluid-energy-machine FEM is directly driven by that motor drive ED and said first rotor R is directly mounted to said motor-rotor MR so that both rotors rotate along a common first rotor axis X.
  • Said first rotor R comprises a centrifugal impeller IMP, which receives process fluid PF from an axial inlet IN and ejects said process fluid PF radially into a diffuser DF.
  • figure 1 shows the impeller IMP and the first rotor R being made as one piece of material and being axially mounted to the rotor shaft by a bolt B.
  • the impeller might be shrink fitted to the rotor R shaft.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP13185932.4A 2013-09-25 2013-09-25 Machine à énergie fluide, procédé pour fonctionner Withdrawn EP2853749A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP13185932.4A EP2853749A1 (fr) 2013-09-25 2013-09-25 Machine à énergie fluide, procédé pour fonctionner
PCT/EP2014/068365 WO2015043877A1 (fr) 2013-09-25 2014-08-29 Machine à énergie fluidique, procédé de fonctionnement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13185932.4A EP2853749A1 (fr) 2013-09-25 2013-09-25 Machine à énergie fluide, procédé pour fonctionner

Publications (1)

Publication Number Publication Date
EP2853749A1 true EP2853749A1 (fr) 2015-04-01

Family

ID=49274424

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13185932.4A Withdrawn EP2853749A1 (fr) 2013-09-25 2013-09-25 Machine à énergie fluide, procédé pour fonctionner

Country Status (2)

Country Link
EP (1) EP2853749A1 (fr)
WO (1) WO2015043877A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3208468A1 (fr) * 2016-02-22 2017-08-23 Siemens Turbomachinery Equipment GmbH Compresseur radial
CN107584091A (zh) * 2017-09-27 2018-01-16 安徽工程大学 一种近净成形的离心铸管管模修复方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6464469B1 (en) * 1999-07-16 2002-10-15 Man Turbomaschinen Ag Ghh Borsig Cooling system for electromagnetic bearings of a turbocompressor
EP1830070A2 (fr) * 2006-02-17 2007-09-05 Nuovo Pignone S.P.A. Compresseur à moteur
JP2008303814A (ja) * 2007-06-08 2008-12-18 Kubota Corp ポンプ
US20110150637A1 (en) * 2005-06-06 2011-06-23 Gebr. Becker Gmbh Radial fan
US20120164005A1 (en) * 2010-12-22 2012-06-28 Thermodyn Motor compressor unit with torsionally flexible coupling placed in a hollow shaft of the compressor
EP2604860A1 (fr) * 2011-12-15 2013-06-19 Wilo Se Pompe à rotor noyé avec préchambre

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9200643B2 (en) * 2010-10-27 2015-12-01 Dresser-Rand Company Method and system for cooling a motor-compressor with a closed-loop cooling circuit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6464469B1 (en) * 1999-07-16 2002-10-15 Man Turbomaschinen Ag Ghh Borsig Cooling system for electromagnetic bearings of a turbocompressor
US20110150637A1 (en) * 2005-06-06 2011-06-23 Gebr. Becker Gmbh Radial fan
EP1830070A2 (fr) * 2006-02-17 2007-09-05 Nuovo Pignone S.P.A. Compresseur à moteur
JP2008303814A (ja) * 2007-06-08 2008-12-18 Kubota Corp ポンプ
US20120164005A1 (en) * 2010-12-22 2012-06-28 Thermodyn Motor compressor unit with torsionally flexible coupling placed in a hollow shaft of the compressor
EP2604860A1 (fr) * 2011-12-15 2013-06-19 Wilo Se Pompe à rotor noyé avec préchambre

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3208468A1 (fr) * 2016-02-22 2017-08-23 Siemens Turbomachinery Equipment GmbH Compresseur radial
WO2017144237A1 (fr) * 2016-02-22 2017-08-31 Siemens Turbomachinery Equipment Gmbh Compresseur radial et système de recirculation des gaz d'échappement
CN108700081A (zh) * 2016-02-22 2018-10-23 豪顿涡轮有限公司 径向压缩机和废气再循环系统
US10662964B2 (en) 2016-02-22 2020-05-26 Howden Turbo Gmbh Radial compressor and exhaust gas recirculation system
CN108700081B (zh) * 2016-02-22 2021-01-01 豪顿涡轮有限公司 径向压缩机和废气再循环系统
CN107584091A (zh) * 2017-09-27 2018-01-16 安徽工程大学 一种近净成形的离心铸管管模修复方法

Also Published As

Publication number Publication date
WO2015043877A1 (fr) 2015-04-02

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