EP2489833B1 - Machine à arbre fileté à deux flux - Google Patents

Machine à arbre fileté à deux flux Download PDF

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Publication number
EP2489833B1
EP2489833B1 EP12000729.9A EP12000729A EP2489833B1 EP 2489833 B1 EP2489833 B1 EP 2489833B1 EP 12000729 A EP12000729 A EP 12000729A EP 2489833 B1 EP2489833 B1 EP 2489833B1
Authority
EP
European Patent Office
Prior art keywords
separator
screw
liquid
screw spindle
liquid phase
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.)
Not-in-force
Application number
EP12000729.9A
Other languages
German (de)
English (en)
Other versions
EP2489833A2 (fr
EP2489833A3 (fr
Inventor
Axel JÄSCHKE
Stefan Ladig
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.)
ITT Bornemann GmbH
Original Assignee
ITT Bornemann GmbH
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 ITT Bornemann GmbH filed Critical ITT Bornemann GmbH
Publication of EP2489833A2 publication Critical patent/EP2489833A2/fr
Publication of EP2489833A3 publication Critical patent/EP2489833A3/fr
Application granted granted Critical
Publication of EP2489833B1 publication Critical patent/EP2489833B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/08—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing
    • F01C1/12—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing of other than internal-axis type
    • F01C1/14—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F01C1/16—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C11/00—Combinations of two or more machines or engines, each being of rotary-piston or oscillating-piston type
    • F01C11/002—Combinations of two or more machines or engines, each being of rotary-piston or oscillating-piston type of similar working principle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/007—General arrangements of parts; Frames and supporting elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/18—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
    • F04C13/007—Venting; Gas and vapour separation during pumping
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2210/00—Fluid
    • F04C2210/24—Fluid mixed, e.g. two-phase fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2220/00—Application
    • F04C2220/20—Pumps with means for separating and evacuating the gaseous phase
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/10—Stators
    • F04C2240/102—Stators with means for discharging condensate or liquid separated from the gas pumped

Definitions

  • the invention relates to a twin-screw screw machine for driving through multi-phase mixtures or for conveying multi-phase mixtures with at least two separate inlet spaces and an outlet space and a separator upstream of the inlet spaces for the separation of liquid phase and gas phase.
  • the WO 94/27049 A1 describes a two-flow multiphase screw pump for conveying a multi-phase mixture.
  • two non-contact meshing, counter-rotating conveyor screw pairs are provided, each comprising a right-handed conveyor screw and a left-handed conveyor screw.
  • the intermeshing conveyor screws together with the enclosing housing individually closed delivery chambers. When rotating via a drive shaft, these chambers move continuously and parallel to the waves from the suction side to the pressure side.
  • the suction side is arranged centrally, the pressure chamber surrounds the conveyor spindles.
  • Facilities for separating the respective liquid phase from the gas phase of the medium flow emerging from the feed screw are provided in the pressure space. A subset of the separated liquid phase is returned via a short-circuit line to the suction chamber.
  • the EP 183 380 A1 describes a twin-screw pump with an inlet chamber arranged frontally on the conveyor screw pairs is. The medium to be pumped is moved towards one another by the two conveyor screw pairs and conveyed away from a centrally arranged outlet.
  • a similarly constructed screw pump is from the GB 2,227,057 A1 known.
  • Condensation means for vaporized fluid are provided within the housing to provide a sufficient supply of liquid.
  • the US 4,995,797 describes a single-flow screw pump with a pressure-controlled return of a separated liquid portion.
  • the separator is arranged on the pressure side of the pump.
  • the US 5,738,505 A relates to a twin-screw screw pump with an upstream separator which separates a liquid phase and a gas phase by gravity.
  • a vertical dividing wall is placed in the separator to divide the inlet stream into two similar sub-streams so that each of the two inlet spaces is supplied with an identical or nearly identical partial stream of gas phase and liquid phase.
  • the multiphase fluid is passed through the screw spindles.
  • the fluid streams in the inlet spaces must have a minimum amount of liquid to seal the gaps between the screw spindles and the housing.
  • the inlet pressure in the inlet spaces is higher than the outlet pressure.
  • the hydraulic energy is converted into mechanical energy, for example, to drive a generator.
  • the object of the present invention is to provide a twin-screw screw machine that is easily adaptable to changing process conditions.
  • the inventive twin-screw screw machine for driving through multi-phase mixtures or for conveying multiphase mixtures with two separate Inlet spaces and an outlet space and a separator for separating liquid phase and gas phase upstream of the inlet spaces provides that both inlet spaces are connected to the separator via separate lines for the separated gas phase and the separated liquid phase.
  • a switching device for interrupting the supply of liquid to an inlet space can be provided, so that at high gas phases and a low level in the separator only one pair of conveying screws is supplied with liquid, so that when operating as a hydraulic motor this continues to run at a reduced power and during operation as a pump, a reduced pump power is provided.
  • outlets for connecting lines from the separator to the liquid-phase inlet spaces may be arranged at different levels, so that automatically when a proportion of liquid in the flow or in the separator falls below a certain level, namely below the level of the upper outlets the liquid phase is supplied through the outlet at the lower level, so that automatically only via this connecting line, the liquid phase is passed into one of the inlet spaces.
  • a switching valve may be arranged in or on a connecting line or in or on the separator, so that via the switching valve, the supply of liquid phase to the screw spindles can be controlled.
  • a storage space and a surge chamber can be formed be, which are in fluid communication with each other.
  • the multiphase mixture passes directly into the surge chamber from a pipeline, for example from a delivery pipe of a hydrocarbon source.
  • a first separation of liquid phase and gas phase takes place.
  • From the surge chamber enter the liquid phase and the gas phase in a storage space, which serves to ensure that on the inlet side of the screw machine a sufficient supply of liquid is present.
  • the liquid phase deposits on the ground due to the different densities, while the gas phase of the multiphase mixture is above the liquid phase in the separator, in particular in the storage space. From the storage space then lead separate lines for the gas phase and the liquid phase to the inlet spaces of the screw machine.
  • a baffle with a passage opening close to the floor can be arranged in the separator, so that the liquid phase already deposited in the surge chamber can flow near the bottom through the passage opening into the storage space.
  • the bottom-near passage opening and other openings in the baffle may be present, for example, to direct the gas phase of the surge chamber to the storage space.
  • a blocking device can be arranged in or on a connecting line for the gas phase from the separator to an inlet space, so that separately or in addition to a blocking of the liquid phase and the blocking of the gas phase can be made at least to an inlet space. As a result, a complete side of the screw machine can be disconnected from the flow, so that the machine can only be operated at half power.
  • FIG. 1 is a schematic representation of a screw machine 1 in the form of a twin-screw multiphase screw motor shown.
  • the screw machine has two separate inlet spaces 11, 12, on the screw pairs, of which in the FIG. 1 only two screw spindles 2, 4 are shown to be supplied with a multiphase mixture.
  • the intake pressure p1 is greater than the exhaust pressure p2 applied to an exhaust chamber 20, so that no fluid can be returned to the intake side by the differential pressure.
  • the spindles 2, 4 drive a generator 6; If the machine is to be operated in pump mode, the spindles 2, 4 are coupled to a motor.
  • a minimum liquid content of the pumped liquid is required.
  • the proportion may be, for example, greater than 30% of the total delivery.
  • a liquid reservoir must be provided on the inlet side in the pipeline before the screw machine. The provision of a liquid supply takes place in the form of an upstream separator with a storage space. The pipeline leads directly into the separator without the fluid having previously passed the screw spindle machine.
  • FIG. 2 A schematic representation of such a structure is in the FIG. 2 shown.
  • the screw pairs 2, 3 and 4, 5 are shown schematically, as well as the two separate inlet spaces 11, 12, the inlet side with the screw pairs 2, 3, 4, 5 cooperate.
  • the inlet spaces 11, 12 and the screw spindle pairs 2, 3, 4, 5 are preceded by a separator 30, which is coupled to the inlet spaces 11, 12 via connecting lines 31, 32, 33.
  • the separator 30 has a surge chamber 36 and a storage space 35.
  • the multiphase mixture passes from a pipe, for example, a delivery line, as indicated by the right arrow.
  • the surge chamber 36 is separated from the storage space 35 by a baffle 37.
  • a bottom-near passage opening 38 is arranged in the form of a bore or a recess. Through the ground-near passage opening 38, the liquid phase, which settles at the bottom of the separator 30, enters the storage space 35.
  • An upper through-opening 39 is also provided in the baffle 37.
  • the upper through-opening 39 has a larger passage cross-section than the ground-near passage opening 38 and serves primarily for the passage of the gas phase. At a high liquid content in the supplied Multiphase flow also passes liquid phase through the upper passage opening 39.
  • An upper connecting line 33 serves to supply the gas phase from the separator 30 to the respective inlet spaces 11, 12.
  • the connecting line 33 has a branch, so that both inlet spaces 11, 12 are subjected to the same gas pressure.
  • the two inlet spaces 11, 12 of the screw machine are connected via the separator 30 on the gas side, so that the inlet pressure is equal on both sides and a hydraulic pressure equalization of the screw pairs 2, 3, 4, 5, so the rotors, guaranteed.
  • the connecting lines 31, 32 for the liquid phase are arranged on the separator 30.
  • two separate connecting lines 31, 32 are provided which cause a separate supply of the liquid phase to the inlet spaces 11, 12.
  • the connecting lines 31, 32 protrude into the separator 30 and there into the storage chamber 35, the outlets 311, 321, ie the openings of the connecting lines 31, 32 into the storage space 35, being at different levels, ie at different altitudes.
  • the connecting line 31 is arranged with the outlet 311 at a higher level than the connecting line 32 with the outlet 321. This arrangement at different levels serves as a switching device which interrupts the liquid supply to the one inlet space 11 as soon as the liquid level in the storage space 35 falls below the level of the outlet 311 of the one connecting line 31.
  • the level of the liquid phase in the storage space 35 of the separator 30 communicates with the level of the inlet spaces 11, 12 at the screw spindle inlets of the screw machine, especially when the separator 30 is at the same level as the inlet spaces 11, 12.
  • the conveying screw pairs 2, 3, 4, 5 receive the necessary amount of liquid directly from a liquid sump in the storage chamber 35.
  • a metering device may be provided within the liquid sump or in one of the connecting lines 31, 32. If no metering device is present, depending on the level of the storage space 35, the conveying screw chambers are filled with more or less liquid.
  • the liquid is removed from the separator 30, so that no mixing device of the gas phase and the liquid phase is present.
  • the gas phase is supplied via the connecting line 33 to the inlet spaces 11, 12 of the screw spindle machines, preferably separated from above, from the liquid phase.
  • the storage behavior of the separator 30 can be influenced. For very high liquid contents in the flow and liquid phase can be supplied via the upper connecting line 33 so that no longer through the lower connecting lines 31, 32 feedable amounts of liquid via the upper connecting line 33 of the screw machine, for example, the hydraulic motor or the pump can be supplied.
  • FIG. 3 the situation is shown in which the liquid phase is at a level which is below the upper outlet 311.
  • Liquid phase is now only passed through the lower outlet 321 through the connecting line 32 to an inlet space 12 and seals there the gaps between the conveyor screw pairs 2, 3 and between them and the housing 10 from.
  • the second inlet space 11 is not supplied with liquid phase, but only with gas phase from the upper connection line 33 and the actually provided for the liquid phase separate connection line 31, so that a gap seal between the conveyor screw pairs 4, 5 does not take place, the inlet side serves only as a gas throttle.
  • FIG. 4 A variant of the invention is in the FIG. 4 shown.
  • the outlets 311, 321 are located at an approximately equal level, for example in the bottom of the separator 30.
  • a switching valve 40 is arranged, which closes upon reaching a predetermined level, which is determined for example by a sensor, so that only an inlet side is supplied with liquid phase. It can be provided in both connecting lines 31, 32 for the liquid phase switching valves 40, which can be switched alternately, so that at a low liquid content and a correspondingly low level within the storage space 35 alternately a pair of conveying screws without sealing and liquid supply is operated while the other conveyor screw pair acts as a gas throttle.
  • FIG. 5 Another variant is in the FIG. 5 in which a blocking device 331 in the form of a switching valve or shut-off valve is arranged inside the connecting line 33 for the gas phase.
  • a blocking device 331 in the form of a switching valve or shut-off valve is arranged inside the connecting line 33 for the gas phase.
  • such an arrangement may serve to switch from a dual-flow operation to a single-flow operation so that there is at least enough fluid to seal a screw-spindle pair through the liquid phase.
  • blocking devices 331 and switching valves 40 may be provided.
  • the screw machine 1 can also be operated as a pump.
  • the advantage of an embodiment described above consists in the separation of the functions of a separation of gas phase and liquid phase and in the provision of hydraulic power.
  • an adaptation to the respective conveying or working process is possible, it is also possible by an adjustable or displaceable arrangement of the baffle 37 within the separator 30 is a variation of the respective room size for the Memory space 35 and the surge chamber 36 make.
  • the separator 30 may for example be tubular, so that it is very inexpensive with a relatively small diameter and a thin wall can be produced. There are no separate means for injection of liquid phase in the respective inlet space 11, 12 necessary, also eliminates the apparatusive effort for a correct proportionate mixture of liquid phase and gas phase.
  • the separator can connect directly to the housing for the conveyor screw pairs and is preferably cylindrical, for example, with a diameter corresponding to the tip circle diameter of the conveyor screw pairs. The volume of the separator is then determined by changing the overall length.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Claims (8)

  1. Machine à arbre fileté à double flux pour entraînement par des mélanges multiphases ou pour le transport de mélanges multiphases, présentant au moins deux chambres d'admission séparées (11, 12) et une chambre de sortie (20), ainsi qu'un séparateur (30) disposé en amont des chambres d'admission (11, 12) destiné à séparer la phase liquide et la phase gazeuse, caractérisée en ce que les deux chambres d'admission (11, 12) sont reliées au séparateur (30) via des conduites séparées (31, 32 ; 33) pour la phase gazeuse séparée et la phase liquide séparée.
  2. Machine à arbre fileté selon la revendication 1, caractérisée en ce qu'un dispositif de commutation (34; 40), destiné à interrompre l'apport de liquide vers une chambre d'admission (11, 12), est prévu.
  3. Machine à arbre fileté selon la revendication 1 ou 2, caractérisée en ce que des sorties (311, 321) pour des conduites de raccordement (31, 32) de la phase liquide sont disposées à différents niveaux dans le séparateur (30).
  4. Machine à arbre fileté selon l'une quelconque des revendications précédentes, caractérisée en ce qu'une soupape de commutation (40) est disposée dans ou sur une conduite de raccordement (31, 32) pour la phase liquide ou le séparateur (30).
  5. Machine à arbre fileté selon l'une quelconque des revendications précédentes, caractérisée en ce qu'une chambre d'accumulation (35) et une chambre de tranquillisation (36), reliées l'une à l'autre du point de vue de la technique des fluides, sont réalisées dans le séparateur (30).
  6. Machine à arbre fileté selon l'une quelconque des revendications précédentes, caractérisée en ce qu'une paroi de tranquillisation (37) présentant une ouverture de passage (38) proche du fond est disposée dans le séparateur (30).
  7. Machine à arbre fileté selon l'une quelconque des revendications précédentes, caractérisée en ce qu'un dispositif de blocage (331) est disposé dans ou sur une conduite de raccordement (33) pour la phase gazeuse du séparateur (30) vers une chambre d'admission (31, 32).
  8. Machine à arbre fileté selon l'une quelconque des revendications précédentes, caractérisée en ce qu'elle est réalisée sous forme de moteur ou de pompe.
EP12000729.9A 2011-02-16 2012-02-03 Machine à arbre fileté à deux flux Not-in-force EP2489833B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011011404A DE102011011404B4 (de) 2011-02-16 2011-02-16 Zweiflutige Schraubspindelmaschine

Publications (3)

Publication Number Publication Date
EP2489833A2 EP2489833A2 (fr) 2012-08-22
EP2489833A3 EP2489833A3 (fr) 2014-08-13
EP2489833B1 true EP2489833B1 (fr) 2015-09-02

Family

ID=45654850

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12000729.9A Not-in-force EP2489833B1 (fr) 2011-02-16 2012-02-03 Machine à arbre fileté à deux flux

Country Status (5)

Country Link
US (1) US9068457B2 (fr)
EP (1) EP2489833B1 (fr)
BR (1) BR102012003414A2 (fr)
DE (1) DE102011011404B4 (fr)
DK (1) DK2489833T3 (fr)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2165890B (en) * 1984-10-24 1988-08-17 Stothert & Pitt Plc Improvements in pumps
GB2227057B (en) * 1988-12-22 1993-01-13 Multiphase Systems Plc Improvements in pumps
JPH02275089A (ja) * 1989-04-13 1990-11-09 Kobe Steel Ltd スクリュ式真空ポンプ
DE4316735C2 (de) * 1993-05-19 1996-01-18 Bornemann J H Gmbh & Co Pumpverfahren zum Betreiben einer Multiphasen-Schraubenspindelpumpe und Pumpe
IT1277541B1 (it) * 1995-09-05 1997-11-11 Nuovo Pignone Spa Pompa a doppia vite perfezionata particolarmente adatta al pompaggio di fluidi bifase in ambiente sottomarino
US5947711A (en) * 1997-04-16 1999-09-07 Gardner Denver Machinery, Inc. Rotary screw air compressor having a separator and a cooler fan assembly
US6478560B1 (en) * 2000-07-14 2002-11-12 Ingersoll-Rand Company Parallel module rotary screw compressor and method
US6962056B2 (en) * 2002-11-13 2005-11-08 Carrier Corporation Combined rankine and vapor compression cycles
US8197700B2 (en) * 2005-12-30 2012-06-12 Saudi Arabian Oil Company Computational method for sizing three-phase separators
JP2010525294A (ja) * 2007-04-24 2010-07-22 キャリア コーポレイション ２系統エコノマイザ回路を備えた冷媒蒸気圧縮システム
EP2165124A4 (fr) * 2007-05-14 2013-05-29 Carrier Corp Système à compression à vapeur de réfrigérant ayant un économiseur à ballon de détente
JP4365443B1 (ja) 2008-07-29 2009-11-18 株式会社神戸製鋼所 無給油式スクリュ圧縮機

Also Published As

Publication number Publication date
EP2489833A2 (fr) 2012-08-22
US20120207866A1 (en) 2012-08-16
BR102012003414A2 (pt) 2014-01-07
US9068457B2 (en) 2015-06-30
DE102011011404B4 (de) 2012-08-30
DE102011011404A1 (de) 2012-08-16
EP2489833A3 (fr) 2014-08-13
DK2489833T3 (en) 2015-12-14

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