EP0142424B1 - Mischstrahlpumpe mit veränderlichem Durchschnitt - Google Patents

Mischstrahlpumpe mit veränderlichem Durchschnitt Download PDF

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Publication number
EP0142424B1
EP0142424B1 EP84402165A EP84402165A EP0142424B1 EP 0142424 B1 EP0142424 B1 EP 0142424B1 EP 84402165 A EP84402165 A EP 84402165A EP 84402165 A EP84402165 A EP 84402165A EP 0142424 B1 EP0142424 B1 EP 0142424B1
Authority
EP
European Patent Office
Prior art keywords
sleeve
profile
enclosure
venturi
elastic
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.)
Expired
Application number
EP84402165A
Other languages
English (en)
French (fr)
Other versions
EP0142424A2 (de
EP0142424A3 (de
Inventor
Marc Vital Alexandre Lepretre
Lucien Dominique Balzano
Michel Raymond Caillault
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.)
Bertin Technologies SAS
Original Assignee
Bertin et Cie SA
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 Bertin et Cie SA filed Critical Bertin et Cie SA
Priority to AT84402165T priority Critical patent/ATE28350T1/de
Publication of EP0142424A2 publication Critical patent/EP0142424A2/de
Publication of EP0142424A3 publication Critical patent/EP0142424A3/xx
Application granted granted Critical
Publication of EP0142424B1 publication Critical patent/EP0142424B1/de
Expired 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
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
    • F04F5/48—Control

Definitions

  • the present invention relates to an ejector-mixer with a proboscis effect and is particularly applicable to energy transformers intended for the recompression of gas or soft vapor.
  • thermocompressors are dilution devices in which energy is exchanged between an engine gas (or vapor) and an aspirated gas (or vapor).
  • Thermocompressors being static devices, are very simple and reliable. They are used in particular on evaporators in the food industry to concentrate an aqueous solution and / or suspension (sugar refinery, dairy, distillery, seawater desalination plant, etc.)
  • an ejector comprises a driving nozzle which opens, by delivering a flow Q 'of steam or gas at a total pressure P' and a total temperature T, into a steam or gas suction pipe (induced flow Q ", total pressure P" at total temperature T ").
  • This sleeve is extended by a mixer where the energy exchange takes place between the two flows then by a diffuser which transforms the kinetic energy resulting from the flow mixture Q, at a static pressure P at the total temperature T.
  • An improvement of the ejectors has been to replace the single inductor by a plurality of nozzles which thanks to the division of the engine jet improves the quality of the mixture and allows for a given recompression rate to increase the entrainment rate.
  • variable geometry is produced, integrating all or part of the converging, the neck at the outlet of this converging and at least part of the diverging.
  • the initial priming is carried out at a neck dimension greater than or equal to the critical dimension, the neck is then closed until the desired pressure level is obtained allowing the passage of the supersonic flow (in the convergent) to subsonic flow (in the divergent) without shock wave formation and with minimization of losses.
  • the part with variable profile advantageously consists of a sleeve or tube of elastic deformable material on which a pressurized fluid is acted controlled by the upstream pressure, the suction pressure or the downstream pressure of the ejector.
  • the deformation of the elastic wall adapts the neck to the conditions of use.
  • the object of the invention is to provide a device in which the formation of lobes is avoided completely or almost completely, without reducing the service life.
  • the invention provides a method of implementing a trunk-effect ejector-mixer of the type comprising one or more inductor nozzles opening into a convergent-divergent duct successively comprising a highly convergent suction sleeve, a variable-profile converging-diverging intermediate part consisting of a sleeve of elastic deformable material housed with sealing in a casing which determines with the sleeve an enclosure surrounding the latter, and a diffuser, characterized in that the elastic sleeve is subjected to a tension preload by stretching its body in the axial direction, before applying an overpressure in the enclosure, to give it the desired convergent-diverging profile. It can then be seen that the sleeve, no longer working in buckling as before but in extension, determines a deformation with a harmonious profile recalling the nozzle profile commonly used in aerodynamics (see Figures 3 and 4).
  • the ejector-mixer shown in FIG. 5 comprises a driving nozzle 1 consisting of a plurality of inductor nozzles 2 (in this case seven) opening into a conduit with convergent-divergent profile 3 disposed along the axis A-A.
  • This conduit 3 comprises upstream a suction sleeve 4 with a highly convergent profile enveloping the driving nozzle 1.
  • the upstream end of this sleeve is in contact with a hollow body 5, which can be connected at 6 to a pipe conveying the induced flow : soft steam for example.
  • the nozzles 2 are fixed to a duct 7 through which they are supplied with inducing fluid, said duct being for this purpose connected, possibly by a strainer 8, to a pipe for supplying the inducing fluid: live steam for example.
  • the diffuser Downstream of the conduit 3, the diffuser consists of a divergent 11 which can be connected to the user member.
  • connection wall between the suction sleeve 4 and the diffuser 11, comprises a substantially cylindrical part 12 followed by a part with low converging taper 13 and finally by a part with variable profile 14.
  • This profile 14 consists (FIG. 6) of a sleeve 15 of elastic deformable material (natural or synthetic rubber, elastomer), housed in a cylindrical casing 16 inserted, with sealing, between adjacent flanges 17A and 17B.
  • the enclosure 18 thus formed is supplied with pressurized fluid by means 19 (pipe).
  • the sleeve 15 is extended on either side by two annular flanges 21 and 22 forming an integral part of the sleeve.
  • the supply of pressurized fluid to the enclosure 18 is provided by a pressure regulator 35 connected to a source of fluid pressure (preferably liquid) by the pipe 36 on the one hand and to the means 19 on the other hand.
  • This regulator 35 is controlled by the upstream driving pressure, the suction pressure or the downstream pressure discharged from the ejector by means of the conduit 37 connected to a pressure tap disposed in the suction sleeve 4, the mixer or the diffuser 11.
  • a change in the upstream, aspirated or downstream reference pressure causes an action on the regulator 35 which acts on the sending of the fluid into the enclosure 18, which has the effect of modifying the internal profile of the sleeve 15, which passes through example of the position shown in solid lines in Figure 6 to the position shown in broken lines.
  • one of the end flanges - for example the left flange designated by 21 - is firmly locked in a fixed jaw 40 integral with the casing 16
  • the opposite end flange 22 is firmly gripped in a movable jaw 41 sliding axially in the casing 16 under the action of a jack 42 of which only the rod is shown.
  • the latter is stretched by moving the movable jaw 41 to the right of the drawing using the jack 42, thereby printing on the sleeve 15 tension preload.
  • the enclosure 18 is put under overpressure again to obtain the convergent-divergent profile with conical neck required.
  • FIG. 6 shows in 43 such a detector of which 44 is seen a stressed radial feeler finger by a spring 45 so that its free end 44A is in permanent contact with the external surface of the elastic sleeve 15 around its mid-length.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • Disintegrating Or Milling (AREA)
  • Gas Burners (AREA)

Claims (5)

1. Verfahren zum Betreiben einer Mischstrahlpumpe mit einer oder mehreren induzierenden Düsen (2), die in einem konvergent-divergenten Kanal (3) münden, welcher in Aufeinanderfolge einen stark konvergierenden Ansaugteil (4), einen konvergent-divergenten Zwischenteil (14) mit veränderlichem Profil und einen Diffusor (11) aufweist, wobei der Zwischenteil von einer Hülle (15) aus elastischem verformbarem Material gebildet wird, die abgedichtet in einem Gehäuse (16) angeordnet ist, welches mit der Hülle (15) einen die letztere umgebenden Raum (18) bildet, dadurch gekennzeichnet, dass die elastische Hülle (15) durch Dehnen ihres Körpers einer Zugspannung in axialer Richtung ausgesetzt wird, ehe in dem Raum (18) ein Überdruck aufgebracht wird, um ihr das gewünschte konvergent-divergente Profil zu verleihen.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Raum (18) zu Beginn mit Unterdruck beaufschlagt wird, um trotz der Dehnung der elastischen Hülle (15), die in der Ruhestellung ein quasi-zylindrisches Profil besitzt, dieses quasizylindrische Profil aufrechtzuerhalten, worauf im Betrieb der Raum (18) unter Überdruck gesetzt wird, um das gewünschte konvergent-divergente Profil zu erzeugen.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das eine Ende (21) der elastischen Hülle (15) lagefixiert ist, wobei die Dehnung durch eine Verschiebung des anderen Endes.(22) erfolgt.
4. Verfahren nach Anspruch 1,2 oder 3, dadurch gekennzeichnet, dass der Druck in dem Raum (18) anhand einer Abtastung (44) des Querschnitts des Körpers der elastischen Hülle (15) ungefähr auf halber Länge derselben gesteuert wird.
EP84402165A 1983-11-10 1984-10-29 Mischstrahlpumpe mit veränderlichem Durchschnitt Expired EP0142424B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84402165T ATE28350T1 (de) 1983-11-10 1984-10-29 Mischstrahlpumpe mit veraenderlichem durchschnitt.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8317869A FR2554874B1 (fr) 1983-11-10 1983-11-10 Ejecteur-melangeur a effet de trompe a section variable et application
FR8317869 1983-11-10

Publications (3)

Publication Number Publication Date
EP0142424A2 EP0142424A2 (de) 1985-05-22
EP0142424A3 EP0142424A3 (de) 1985-06-19
EP0142424B1 true EP0142424B1 (de) 1987-07-15

Family

ID=9293972

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84402165A Expired EP0142424B1 (de) 1983-11-10 1984-10-29 Mischstrahlpumpe mit veränderlichem Durchschnitt

Country Status (5)

Country Link
US (1) US4586873A (de)
EP (1) EP0142424B1 (de)
AT (1) ATE28350T1 (de)
DE (1) DE3464787D1 (de)
FR (1) FR2554874B1 (de)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
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DK158109C (da) * 1988-02-04 1990-08-20 Dems Eng Omstillelig ejektor
US4800920A (en) * 1988-04-05 1989-01-31 Whitey Co. Pinch valve
US4877053A (en) * 1988-04-05 1989-10-31 Whitey Co. Pinch valve
FR2632688A1 (fr) * 1988-06-10 1989-12-15 Entrepose Montalev Ejecteur
US4899783A (en) * 1988-09-30 1990-02-13 Whitey Co. Pinch valve
US4938245A (en) * 1989-09-25 1990-07-03 Fluidmaster, Inc. Low noise toilet tank valve
WO1991010832A1 (en) * 1990-01-17 1991-07-25 Helios Research Corp. Silencer system for hydrokinetic amplifier
US5326468A (en) * 1992-03-02 1994-07-05 Cox Dale W Water remediation and purification method and apparatus
US6079628A (en) * 1994-04-06 2000-06-27 Kenny; Thomas M. Self-contained temperature and pressure operated pinch valve
IL122396A0 (en) * 1997-12-02 1998-06-15 Pekerman Oleg Method of heating and/or homogenizing of liquid products in a steam-liquid injector
FR2788109B1 (fr) * 1998-12-30 2001-06-08 Total Raffinage Distribution Dispositif pour ameliorer le brulage des combustibles gazeux
US6877960B1 (en) * 2002-06-05 2005-04-12 Flodesign, Inc. Lobed convergent/divergent supersonic nozzle ejector system
US8505310B2 (en) * 2008-10-22 2013-08-13 General Electric Company Gas turbine ejector and method of operation
DE202009019074U1 (de) 2009-11-24 2016-05-23 J. Schmalz Gmbh Druckluftbetriebener Unterdruckerzeuger
US8794902B1 (en) 2010-01-26 2014-08-05 II Daniel K. Van Ness System and method to improve the exhaust pressure across a RAM air turbine through secondary flow mixing
US8480361B1 (en) * 2010-01-26 2013-07-09 Mainstream Engineering Corporation Enhanced system and method to increase the total-to-static pressure ratio across a RAM air turbine using surface contoured flow agitators
CN102865258B (zh) * 2012-10-17 2015-10-07 南通赛孚机械设备有限公司 一种低能耗蒸汽喷射真空泵
CN108884840B (zh) * 2016-04-01 2020-03-31 蒂埃尔威有限公司 喷射器、喷射器的制造方法以及扩散器的出口流路的设定方法
CN108884839B (zh) * 2016-04-01 2020-03-31 蒂埃尔威有限公司 喷射器、喷射器的制造方法以及扩散器的出口流路的设定方法
DE102017124699A1 (de) 2017-10-23 2019-04-25 Avl Emission Test Systems Gmbh Abgasprobenentnahmesystem
US10760838B2 (en) * 2017-12-20 2020-09-01 Lennox Industries Inc. Method and apparatus for refrigerant detector calibration confirmation
CN108672123B (zh) * 2018-07-06 2021-01-19 西安交通大学 一种混合腔喉部面积可调节的喷射器
CN109738032A (zh) * 2019-03-14 2019-05-10 湖南大麓科技有限公司 一种管道流量测定装置和方法

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US1457799A (en) * 1920-12-31 1923-06-05 Westinghouse Electric & Mfg Co Fluid-translating device
DE415379C (de) * 1924-05-24 1925-06-20 Werft Akt Ges Fa Deutsche Dampfstrahl-Mischvorrichtung mit Verdichtungsduese zur Erzeugung von Mischdampf aus hoch- und niedriggespanntem Dampf
US2142520A (en) * 1935-08-15 1939-01-03 Ingersoll Rand Co Thermocompressor
US2074480A (en) * 1936-03-18 1937-03-23 Ingersoll Rand Co Thermocompressor
DE1054798B (de) * 1958-02-05 1959-04-09 Bopp & Reuther Gmbh Druckmittelbetaetigtes Schlauchventil
US3276480A (en) * 1965-07-01 1966-10-04 Barber Colman Co Regulator for constant volume of gas flow
US3448691A (en) * 1967-07-03 1969-06-10 David M Frazier Energy controller
SU390304A1 (ru) * 1971-08-23 1973-07-11 Струйный насос
US3791764A (en) * 1972-03-01 1974-02-12 Garrett Corp Variable area ratio jet pump
GB1420215A (en) * 1972-03-09 1976-01-07 British Gas Corp Jet boosters
US3942724A (en) * 1974-08-01 1976-03-09 S.R.C. Laboratories, Inc. Variable throat nozzle
FR2534983A1 (fr) * 1982-10-20 1984-04-27 Chacoux Claude Compresseur supersonique a jet

Also Published As

Publication number Publication date
EP0142424A2 (de) 1985-05-22
ATE28350T1 (de) 1987-08-15
FR2554874A1 (fr) 1985-05-17
EP0142424A3 (de) 1985-06-19
FR2554874B1 (fr) 1988-04-15
US4586873A (en) 1986-05-06
DE3464787D1 (en) 1987-08-20

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