WO2014146956A1 - Système d'étanchéité et turbocompresseur équipé d'un tel système d'étanchéité - Google Patents

Système d'étanchéité et turbocompresseur équipé d'un tel système d'étanchéité Download PDF

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Publication number
WO2014146956A1
WO2014146956A1 PCT/EP2014/054867 EP2014054867W WO2014146956A1 WO 2014146956 A1 WO2014146956 A1 WO 2014146956A1 EP 2014054867 W EP2014054867 W EP 2014054867W WO 2014146956 A1 WO2014146956 A1 WO 2014146956A1
Authority
WO
WIPO (PCT)
Prior art keywords
ionic liquid
sealing
shaft
sealing device
liquid
Prior art date
Application number
PCT/EP2014/054867
Other languages
German (de)
English (en)
Inventor
Udo Reckels
Wolfgang NIEDERWIPPER
Original Assignee
Siemens Aktiengesellschaft
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 Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2014146956A1 publication Critical patent/WO2014146956A1/fr

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
    • F04D29/06—Lubrication
    • F04D29/063—Lubrication specially adapted for elastic fluid pumps
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M171/00—Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredients which are physically well-defined but for which the chemical nature is either unspecified or only very vaguely indicated
    • 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
    • F04D29/12—Shaft sealings using sealing-rings
    • F04D29/122—Shaft sealings using sealing-rings especially adapted for elastic fluid pumps
    • F04D29/124—Shaft sealings using sealing-rings especially adapted for elastic fluid pumps with special means for adducting cooling or sealing fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/40—Sealings between relatively-moving surfaces by means of fluid
    • F16J15/406—Sealings between relatively-moving surfaces by means of fluid by at least one pump
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01—Physico-chemical properties
    • C10N2020/077—Ionic Liquids
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/34—Lubricating-sealants

Definitions

  • the invention relates to a sealing device for a shaft of a turbocompressor, having a liquid lubrication device for bearing the shaft and a liquid-containing barrier device for sealing off arranged on the shaft mechanical seals.
  • Turbo compressors include a rotor disposed in a housing having a shaft and one or more impellers.
  • the shaft is supported at opposite ends outside the housing. Since the wave at its longitudinal ends the
  • the sealing device separates the process side or a process space inside the turbocompressor from the environment or the atmosphere.
  • turbocompressors are z. B. used in chemical plants to compress gases. Since the gases are a dangerous, z. B. may have toxic effect, it is necessary that an exit of the compressed process gas is avoided in the environment.
  • a sealing gas is removed from the process gas of the compressor, processed in a Sperrgastafel and returned via gas seals.
  • an external intermediate blocking gas e.g. As nitrogen, needed, then z. B. over the roof of a factory building is derived.
  • lubrication device refers to a device for supplying lubricant to a bearing, in particular the bearing of the shaft of the turbocompressor.
  • barrier oil systems have the disadvantage that the process gas must again be separated from the barrier oil, which results in additional expense.
  • the invention is therefore based on the object to provide a sealing device for a shaft of a turbocompressor, which is simpler and less expensive.
  • the invention provides, in a sealing device of the type mentioned at the outset, that the liquid provided for the blocking device is an ionic liquid.
  • the invention is based on the idea that a substantial improvement and simplification of a sealing device can be achieved if an ionic liquid is used instead of a conventionally used barrier oil.
  • Ionic liquids whose properties z. As described in WO 2006/034748 Al, are low-melting, organic salts with melting points between 100 ° C and -90 ° C, with most ionic liquids are already in liquid form at room temperature.
  • ionic liquids are completely ionic and therefore show new properties. Ionic liquids can be modified in their properties by varying the structure of anion and / or cation and by varying their combinations. technical problems can be adjusted comparatively well. In contrast to conventional molecular liquids, ionic liquids also have the advantage that they have no measurable vapor pressure. This means that even in a high vacuum they do not evaporate in the slightest traces. This results in the properties
  • liquidus range that is, the range between melting point and thermal decomposition
  • ionic liquids have a high thermal stability. Their decomposition temperature is above 400 ° C.
  • the density and the mixing behavior with other liquids can be influenced or adjusted for ionic liquids if necessary by the choice of the ions.
  • Ionic liquids also have the advantage that they are electrically conductive and can thus prevent electrical charges.
  • ionic liquids are characterized by the fact that they are corrosion-inhibiting and have good lubricating properties.
  • the sealing of the shaft seals arranged on the shaft is effected by means of the blocking device comprising the ionic liquid.
  • the ionic liquid serves to shut off the process gas in the interior of the turbocompressor from the environment.
  • the liquid provided for the lubrication device is an ionic liquid.
  • the ionic liquid can thus be used both for the barrier device and optionally for the lubrication device. Since the ionic liquid has lubricating properties Shanks, it can be used to lubricate the bearings of the shaft of the turbo compressor.
  • the shaft of a turbocompressor is mounted on both shaft ends by means of radial bearings and / or axial-radial bearings. These bearings require a permanent oil lubrication, according to the invention, this lubrication is carried out by means of the ionic liquid.
  • the ionic liquid is received in a reservoir which is connected via lines to the barrier device and optionally to the lubrication device.
  • the ionic liquid is added, from there it passes via lines to the locking device and optionally also to the lubrication device. It is also possible to use a conventional one
  • the storage tank is assigned to a treatment plant for the ionic liquid to regulate pressure and / or temperature and / or flow rate of the ionic liquid and / or perform a cleaning of the ionic liquid.
  • the reservoir is z.
  • a pump that is capable of producing a certain pressure differential required for the barrier device or the lubrication device is assigned.
  • the temperature of the ionic liquid can be controlled to a required value.
  • a required volume flow can also be regulated by a pump.
  • a cleaning device for the ionic liquid may be provided, for.
  • the treatment plant may be located in or at or near the storage tank or at a remote location.
  • both the barrier device and the lubrication device are supplied with the same ionic liquid.
  • the barrier device and the lubrication device each require an ionic liquid with different temperature or different pressure.
  • the treatment plant can be designed to provide the barrier device and the lubrication device with ionic liquid at different pressures and / or temperatures.
  • the blocking device and the lubrication device can each be assigned a separate supply line, in each of which a temperature control unit is located in order to set the desired pressure and the desired temperature in each case.
  • the sealing device according to the invention essentially the following embodiments are possible: the locking device and the lubrication device are supplied with the same ionic liquid, with the same temperature and the same pressure.
  • the barrier means and the lubrication means may be supplied with the same ionic liquid but having a different pressure.
  • the temperature of the ionic liquids which is supplied to the barrier device or the lubrication device may also differ.
  • the barrier device and the lubrication device are supplied with different ionic liquids.
  • the sealing device preferably has a labyrinth seal sealed by means of a sealing gas.
  • Labyrinth seal which preferably has two arranged on both sides of the rotor on the shaft labyrinth seals, is acted upon with a sealing gas to block sealing gaps of the labyrinth seals. In this way it is prevented that a process gas can escape from the interior of the turbocompressor into the environment or the atmosphere.
  • Self-blocking gas (process gas) is preferably used as the sealing gas.
  • the labyrinth seals is each to Shaft end towards the mechanical seal arranged. In this area, there is a mixing of the barrier gas with the ionic liquid.
  • the sealing device according to the invention it is therefore preferred that it has a gas-liquid separator for separating the mixture of ionic liquid and the sealing gas.
  • the separation unit in the form of the gas-liquid separator can be very simple. In comparison to the conventionally used lubricating oil, no consumption of the ionic liquid or at most a very low consumption is to be expected.
  • the locking device In the sealing device according to the invention, it is preferred that the locking device and optionally the
  • Lubricator forms a closed system for the ionic liquid or form.
  • the ionic liquid passes from the reservoir to the barrier device and optionally to the lubrication device in the region of the shaft of the turbocompressor, after which the ionic liquid passes through a
  • the invention relates to a turbocompressor with a shaft, which is sealed by means of a sealing device relative to the environment.
  • the turbocompressor according to the invention is characterized in that it has at least one sealing device of the type described.
  • FIG. 1 shows a turbocompressor according to the invention with a sealing device according to the invention with lines for the ionic liquid.
  • FIG. 2 shows the essential components of a turbocompressor according to the invention with a sealing device according to the invention.
  • the turbocompressor 1 shown schematically in FIG. 1 has a rotor 3, which comprises a shaft 2 and a plurality of wheels.
  • the rotor 3 is accommodated in a housing of the turbocompressor 1.
  • an ionic liquid is taken up, which consists entirely of electrically negative and positively charged particles.
  • the ionic liquid is non-flammable, electrically conductive, corrosion-inhibiting and has good lubricating properties.
  • Fig. 1 also shows a bearing block 4 with seal carrier.
  • To the reservoir 5 includes a treatment plant 6, which sets a certain pressure, a predetermined temperature and a flow rate, which is required for the turbocompressor 1.
  • the treatment plant 6 is designed to purify the ionic liquid collected in the storage container 5 in order to separate any particles that may be present.
  • the treatment plant can be arranged on or in the storage container or at a remote location.
  • the ionic liquid passes via a line 7 to a locking device 8, which is part of a sealing device 9.
  • the locking device comprises 8 mechanical seals, wherein a primary ring on the
  • Compressor housing and a mating ring is mounted on the shaft 2.
  • Fig. 1 it can be seen that the ionic liquid from the reservoir 5 via the line 7 and a branching Line also passes to a lubrication device 10, are supplied by the bearings of the shaft 2 with the ionic liquid, which serves as a lubricant.
  • a lubrication device 10 There are also other designs conceivable in which the
  • Locking device and the lubrication device require different pressures and / or temperatures, in this case branch off from the treatment plant 6 in the reservoir 5 two or more separate lines to supply on the one hand the locking device 8 and on the other hand, the lubrication device 10 with ionic liquid.
  • the area of the rotor 3 is in the housing by a
  • Blocking gas 11 applied which is shown in Fig. 1 by arrows. Parts of the sealing gas are passed through the housing 20 of the turbocompressor 1 and further z. B. derived via a torch or a building roof to the outside.
  • the sealing device 9, which comprises the sealing gas 11, the locking device 8 and the lubrication device 10 is constructed symmetrically, that is, the shaft 2 has on both sides of the rotor 3 each have a locking device 8 and a lubrication device 10 on.
  • the device from the seal (Blocking device 8) overflows.
  • a portion of the ionic liquid is in a line 13.
  • This ionic liquid is mixed with the barrier gas and is therefore supplied via a line 14 to a gas-liquid separator 15, in which the ionic liquid and the sealing gas be separated.
  • the separated barrier gas Via a line 16, the separated barrier gas z. B. to the compressor suction or torch.
  • the Gas-liquid separator 15 is connected via a line 17 to the reservoir 5, so that the ionic liquid is in a closed circuit, whereby virtually no losses occur.
  • the present in the line 14 mixture of ionic liquid and the sealing gas can be easily separated by the gas-liquid separator 15, since each substance is present as a separate phase and mixing, which in a conventional lubricating fluid, eg. As an oil occurs, is not possible.
  • Fig. 2 shows the shaft 2 of the turbocompressor 1 in detail.
  • the lubrication device 10 supplies on the one hand a radial bearing shown in FIG. 2 on the right-hand side of the shaft 2 as well as an axial-radial bearing shown on the left-hand side of FIG. 2.
  • the locking device 8 comprises mechanical seals 18, which prevent the escape of the sealing gas. Immediately adjacent impellers are located on both sides labyrinth seals 19, the outlet of a process gas from the

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne un système d'étanchéité (9) destiné à un arbre (2) d'un turbocompresseur (1), comprenant un système de lubrification (10) contenant un liquide servant à lubrifier les paliers de l'arbre (2) et un système d'arrêt (8) contenant un liquide servant à assurer l'étanchéité de garnitures mécaniques d'étanchéité (18) disposées sur l'arbre (2). Le liquide destiné au système d'arrêt (8) est un liquide ionique.
PCT/EP2014/054867 2013-03-21 2014-03-12 Système d'étanchéité et turbocompresseur équipé d'un tel système d'étanchéité WO2014146956A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013205027.5 2013-03-21
DE102013205027.5A DE102013205027A1 (de) 2013-03-21 2013-03-21 Dichtungseinrichtung und Turboverdichter mit einer derartigen Dichtungseinrichtung

Publications (1)

Publication Number Publication Date
WO2014146956A1 true WO2014146956A1 (fr) 2014-09-25

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PCT/EP2014/054867 WO2014146956A1 (fr) 2013-03-21 2014-03-12 Système d'étanchéité et turbocompresseur équipé d'un tel système d'étanchéité

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Country Link
DE (1) DE102013205027A1 (fr)
WO (1) WO2014146956A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3575641A1 (fr) 2018-05-30 2019-12-04 Siemens Aktiengesellschaft Dispositif, en particulier turbomachine comprenant un dispositif formant joint d'étanchéité d'arbre

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE954657C (de) * 1954-06-19 1956-12-20 Tech Studien Ag Einrichtung zur Abdichtung der Welle einer Turbomaschine durch Fluessigkeitssperrung fuer Waermekraftanlagen mit gasfoermigem Arbeitsmittel
US3420434A (en) * 1966-12-30 1969-01-07 Judson S Swearingen Rotary compressors and systems employing same using compressor gas as seal gas
DE1525846A1 (de) * 1966-10-12 1969-09-18 Sulzer Ag Wellenabdichtung eines Geblaeses,insbesondere des Umwaelzgeblaeses einer gasgekuehlten Kernreaktoranlage
DE1628391A1 (de) * 1967-08-18 1971-06-16 Sulzer Ag Anlage zum Foerdern,Verdichten bzw. Umwaelzen von Gasen mit einem durch einen Elektromotor angetriebenen Foerdergeblaese
US3670850A (en) * 1969-10-27 1972-06-20 Judson S Swearingen Removal of dispersed gas from lubricating fluids
WO2006034748A1 (fr) 2004-09-24 2006-04-06 Linde Aktiengesellschaft Procede et dispositif de compression d'un agent gazeux
DE102007040090A1 (de) * 2007-08-24 2009-02-26 Linde Ag Verdichten eines Sauerstoff-enthaltenden Mediums
EP2436932A2 (fr) * 2010-09-30 2012-04-04 KSB Aktiengesellschaft Joint à fluide magnétique

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE954657C (de) * 1954-06-19 1956-12-20 Tech Studien Ag Einrichtung zur Abdichtung der Welle einer Turbomaschine durch Fluessigkeitssperrung fuer Waermekraftanlagen mit gasfoermigem Arbeitsmittel
DE1525846A1 (de) * 1966-10-12 1969-09-18 Sulzer Ag Wellenabdichtung eines Geblaeses,insbesondere des Umwaelzgeblaeses einer gasgekuehlten Kernreaktoranlage
US3420434A (en) * 1966-12-30 1969-01-07 Judson S Swearingen Rotary compressors and systems employing same using compressor gas as seal gas
DE1628391A1 (de) * 1967-08-18 1971-06-16 Sulzer Ag Anlage zum Foerdern,Verdichten bzw. Umwaelzen von Gasen mit einem durch einen Elektromotor angetriebenen Foerdergeblaese
US3670850A (en) * 1969-10-27 1972-06-20 Judson S Swearingen Removal of dispersed gas from lubricating fluids
WO2006034748A1 (fr) 2004-09-24 2006-04-06 Linde Aktiengesellschaft Procede et dispositif de compression d'un agent gazeux
DE102007040090A1 (de) * 2007-08-24 2009-02-26 Linde Ag Verdichten eines Sauerstoff-enthaltenden Mediums
EP2436932A2 (fr) * 2010-09-30 2012-04-04 KSB Aktiengesellschaft Joint à fluide magnétique

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3575641A1 (fr) 2018-05-30 2019-12-04 Siemens Aktiengesellschaft Dispositif, en particulier turbomachine comprenant un dispositif formant joint d'étanchéité d'arbre
WO2019228729A1 (fr) 2018-05-30 2019-12-05 Siemens Aktiengesellschaft Ensemble, en particulier turbomachine, comprenant un dispositif d'étanchéité d'arbre
RU2753946C1 (ru) * 2018-05-30 2021-08-24 Сименс Акциенгезелльшафт Устройство, в частности турбомашина, содержащая конструкцию для уплотнения вала
US11674600B2 (en) 2018-05-30 2023-06-13 Siemens Energy Global Gmbh & Co., Kg Assembly, more particularly turbomachine, comprising a shaft seal device

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