EP2016994A2 - Mélangeur pour milieux gazeux et procédé de mélange de milieux gazeux - Google Patents

Mélangeur pour milieux gazeux et procédé de mélange de milieux gazeux Download PDF

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Publication number
EP2016994A2
EP2016994A2 EP08012921A EP08012921A EP2016994A2 EP 2016994 A2 EP2016994 A2 EP 2016994A2 EP 08012921 A EP08012921 A EP 08012921A EP 08012921 A EP08012921 A EP 08012921A EP 2016994 A2 EP2016994 A2 EP 2016994A2
Authority
EP
European Patent Office
Prior art keywords
gas
openings
control
mixer
control sleeve
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Withdrawn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
EP08012921A
Other languages
German (de)
English (en)
Other versions
EP2016994A3 (fr
Inventor
Florian Virchow
Thomas Ermschel-Fehlig
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.)
Motortech GmbH
Original Assignee
Motortech 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 Motortech GmbH filed Critical Motortech GmbH
Publication of EP2016994A2 publication Critical patent/EP2016994A2/fr
Publication of EP2016994A3 publication Critical patent/EP2016994A3/fr
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/10—Mixing gases with gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B01F25/3124—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow
    • B01F25/31242—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow the main flow being injected in the central area of the venturi, creating an aspiration in the circumferential part of the conduit

Definitions

  • the invention relates to a mixer for gaseous media with a Venturi tube, through which a gas flows in the tube axis direction and in the region of which a narrowed cross-section are provided on the tube wall inlet openings for admixed gas and a method using the mixer.
  • Characteristics of the mixer for gaseous media with a Venturi tube through which a gas flows in the tube direction and in the region of reduced cross-section at the pipe wall inlet openings are provided for admixing gas is that the inlet openings have a variable passage cross-section which during operation during of the mixing process by means of control elements are changeable. With the variability of the passage cross-sections for the admixed gas during operation, a constant fine adjustment of the gas admixture is achieved. This is very important for smooth running and efficient use of energy.
  • the passage cross sections of the inlet openings during operation during the mixing process by means of the control elements are continuously changed according to regulation specifications. With continuous adjustment, the mixer can respond sensitively and quickly to compositional changes of the resource (s) during operation.
  • the region of the Venturi tube with a narrowed cross-section, in which the inlet openings are located, is adjustable with respect to the venturi-adjustable control members, by means of which the passage cross sections of the inlet openings are variable during an adjustment.
  • the control members include at least one, the narrowed cross-section comprehensive control sleeve which is provided with fuel flow openings, wherein in a mutual adjustment of the fuel control openings and the inlet openings, the size of the passage cross sections is variable.
  • control sleeve is adjustable by means of a control mechanism.
  • control sleeve is connected to the control mechanism via a thrust strip, which adjusts the control sleeve according to the specifications of the control mechanism, preferably a flexible to spring-stiff push strip, whereby the passage cross sections are variable.
  • the thrust strip preferably has a certain rigidity. It is supported on the outer housing wall. This has the advantage that the friction on the control sleeve remains almost constant and is not dependent on biasing. A thermal expansion in the housing does not lead to an increase in the friction in the control sleeve, but has only an effect on the angle of rotation of the control sleeve.
  • the thrust strip is attached to a roller of the control mechanism on the one hand and on the control sleeve on the other hand, and that the control sleeve on the narrowed cross-section of the Venturi tube according to the adjustment of the control mechanism of the roller on the thrust plate rotatable is.
  • control sleeve is connected to the control mechanism via a rigid push rod, which adjusts the control sleeve according to the specifications of the control mechanism and thus the passage cross sections are variable.
  • control sleeve is provided with a ring gear, via which a pinion operated by the control mechanism drives a toothed belt with which the control sleeve on the narrowed cross section of the Venturi tube is rotatable according to the specifications of the control mechanism and so that the passage cross sections are changeable.
  • the rigid push rod or the ring gear are provided.
  • a window is provided in the mixer housing, through which the position of the actuators can be observed.
  • a gas displacement body e.g. in the form of a Zeppelins, if necessary exchangeable, is arranged.
  • the interchangeability is used for rapid adaptation of the cross-section of the constricted Venturi tube, with which an adaptation to any operating conditions is achieved.
  • the gas displacement body is preferably hollow on the side in the flow shadow and there has a corresponding outlet opening for the gas.
  • At least two gas supply lines are provided for admixing gas.
  • the (at least) two gas connections enable the supply of different gases.
  • control sleeve must fit as accurately as possible on the Venturi tube; However, it must not become stiff due to soiling or thermal expansion. According to a particular embodiment of the invention, it is provided that the control sleeve consists of a dimensionally stable and self-lubricating material.
  • the dimensionally stable and self-lubricating material of the control sleeve contains stabilizing and lubricating components.
  • the material of the control sleeve is made of plastic, in particular of a plastic lubricated with a solid lubricant.
  • a suitable material is for example Murylat SP® (PETP-SP).
  • the working method used for mixing the gases uses a mixer with a Venturi tube through which a gas flows in the tube direction and in the region of reduced cross-section flows through admixed by inlet openings provided on the tube wall, wherein the passage cross sections of the inlet openings are changed to adapt the composition of a mixed gas to be supplied to a consumer to the needs.
  • the passage cross sections of the inlet openings are continuously changed in the operation for the mixing process as needed to continuously adapt the composition of a mixed gas to be supplied to a consumer needs.
  • Fig. 1 shows a mixer for gaseous media, which are supplied to a consumer, for example, an internal combustion engine.
  • the mixer 1 consists of a housing 2, in which a Venturi tube 3 is located. Through the inlet 4 of the Venturi tube 3 air is sucked into the engine downstream located.
  • the Venturi tube 3 is arranged in a mixer housing 2, which serves to guide the gas.
  • a fuel gas supply 5 It is a fuel gas supply 5 to recognize.
  • a control mechanism 6 for a later explained regulating sleeve, which makes the supply of the fuel gas controllable.
  • the tube region 7 of the Venturi tube 3 with a narrowed cross section is provided with inlet openings 8 for the fuel gas in the tube region 7.
  • a zeppelin-shaped gas displacement body 10 is arranged along the axis of the Venturi tube 3 by means of struts 9.
  • Fig. 2 shows the core region of the mixer 1 and that the Venturi tube 3 with the conically tapered inlet, the narrowed tube portion 7 and the conically widening outlet 12.
  • the inlet openings 8 can be seen.
  • the Venturi tube 3 can be inserted into the mixer housing.
  • the pipe portion 7 is comprised of a control sleeve 14, which in Fig. 3 in side view and in Fig. 4 is shown as a single part.
  • the control sleeve 14 consists of a dimensionally stable and self-lubricating material. It is possible that the dimensionally stable and self-lubricating material of the control sleeve contains stabilizing and lubricating components.
  • the control sleeve may be made of metal, ceramic, plastic or a composite material.
  • the material should meet the requirements of being dimensionally stable and self-lubricating.
  • An example of a suitable material is Murylat SP®.
  • Such a dimensionally stable and self-lubricating material is for example a plastic.
  • the control sleeve 14 is provided with fuel gas control openings 15.
  • the openings 8 and 15 correspond to each other, but they do not have to.
  • the control sleeve 14 has a collar 16 on which a flexible to feather-resistant push strip 17 is attached.
  • the push rod may, for example, have a rigidity on the order of a cable tie.
  • the other end of the push strip 17 is attached to a roller 18.
  • the roller 18 is seated on a shaft 19 of the control mechanism 6. Rotational movements of the shaft 19 are transmitted to the thrust strip 17, whereby also the control sleeve 14 is rotated, adjusted.
  • the thrust strip 17 applies when pushed against the wall 20 or a similar kind of guide element and is supported on the wall or the guide element.
  • a variant of the pushing operation of the control sleeve 14 is shown.
  • a rigid push rod 22 is used, which adjusts the control sleeve 14.
  • the push rod 22 is hinged to the roller 18 and the control sleeve 14, for example by means of ball joints 23.
  • Fig. 7 shows a drive for rotating the control sleeve 14 by means of a toothed belt 24.
  • the control sleeve 14 is for this purpose with a sprocket 25 (FIG. FIGS. 9 and 10 ) Mistake.
  • the toothed belt 24 is moved by a pinion 26 and rotated about the ring gear, the control sleeve 14.
  • the pinion 26 is driven by the control mechanism 6 according to specifications of the control device, not shown.
  • Fig. 8 is a two-part embodiment of the control sleeve 14 is shown in exploded view.
  • the two parts 14a and 14b are put together on the pipe section 7.
  • the change in the passage cross sections 21 during rotation of the control sleeve 14 behaves as in the case of the slide strips 17 and push rods 22, by the inlet openings 8 and the fuel control openings 15 move against each other.
  • the blending of the fuel gas can be adjusted continuously to the requirements.
  • FIGS. 9 and 10 a one-piece control sleeve 14 is shown with sprocket 25 and other forms of fuel regulating openings 15.
  • the shape and size of the fuel regulator openings and inlet openings 8 depends on the flow rates.
  • the openings 8 and 15 are elongated.
  • the ring gear 25 is arranged in a multi-row arrangement of the inlet openings 8 on the Venturi tube and the fuel regulating openings 15 on the control sleeve 14 between the openings.
  • Fig. 9 shows the control sleeve 14 alone. In Fig. 10 it is pushed over the narrowed tube portion 7 of the Venturi tube 3. It can also be seen how the passage cross sections 21 between the inlet openings 8 and the fuel regulating openings 15 remain free.
  • the collar 16 and the sprocket 25 can in all variants of the control sleeve 14 on a sleeve side as in Fig. 4 or in the middle between the fuel regulating openings 15 as in FIG FIGS. 9 and 10 be provided. It is also possible to place the fuel regulating openings at the sleeve edges, wherein they may be open to the flanks of the regulating sleeves.
  • Fig. 11 shows a mixer 1 with two nozzles 5 for the supply of different fuel gases.
  • the channel 7 of the Venturi tube 3 it can be seen how the zeppelin-shaped body 10 extending along the axis of the Venturi tube 3 is suspended on the struts 9.
  • the struts 9 may be hollow to be aligned continuously with the openings 8 for the purposes of gas transport, and in this case in turn have openings 30, preferably on both sides of the / each strut, in particular in the rear part of the strut (with respect to the flow direction) and / or expiring in the body 10 at the end.
  • Fig. 12 shows how the mixer housing 2, a window 27 is provided through which can be observed, which position the control sleeve 14 at the moment of inspection has. It can be seen a reference line 28 on the mixer housing 2 and a bar code 29 on the control sleeve 14. In this way, an optical control of the size of the passage cross-sections is possible.
  • Fig. 13 shows a longitudinal section through the Venturi tube 3. Based on the longitudinal section can be seen zeppelin-shaped body in the channel 7. The zeppelin-shaped body is interchangeable. Thus, the passage cross section of the channel is variable. However, this variation is more static, since an exchange is not possible during operation. It is therefore an option to make before the start of operation.
  • Fig. 14 shows a longitudinal section through a hollow Gasverdritzungsharm 10 in Zeppelin form. Also shown are the inner end surfaces of the hollowed drop-shaped struts 9 which secure the gas displacement body in the Venturi tube and through which fuel gas is directed into the hollow interior of the gas displacement body. Through the outlet openings 31 in the gas displacement body on the outer lateral surface beyond the two end faces, the gas / fuel gas (possibly proportionately) is introduced into the inner region of the Venturi tube.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Accessories For Mixers (AREA)
EP08012921A 2007-07-17 2008-07-17 Mélangeur pour milieux gazeux et procédé de mélange de milieux gazeux Withdrawn EP2016994A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007033627A DE102007033627A1 (de) 2007-07-17 2007-07-17 Mischer für gasförmige Medien und Verfahren zum Mischen von gasförmigen Medien

Publications (2)

Publication Number Publication Date
EP2016994A2 true EP2016994A2 (fr) 2009-01-21
EP2016994A3 EP2016994A3 (fr) 2009-04-01

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EP08012921A Withdrawn EP2016994A3 (fr) 2007-07-17 2008-07-17 Mélangeur pour milieux gazeux et procédé de mélange de milieux gazeux

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EP (1) EP2016994A3 (fr)
DE (1) DE102007033627A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012156077A1 (fr) 2011-05-19 2012-11-22 Mtu Friedrichshafen Gmbh Mélangeur de gaz, système de mélange de gaz et moteur à gaz
DE102011086321A1 (de) * 2011-11-14 2013-05-16 Mtu Friedrichshafen Gmbh Gasmischer und Gasmischsystem
EP2821130A3 (fr) * 2013-07-02 2015-04-22 Johnson Electric S.A. Mélangeur Venturi
GB2544325A (en) * 2015-11-13 2017-05-17 Caterpillar Energy Solutions Gmbh A mixer with variable diameter body in venturi
CN110748440A (zh) * 2018-07-23 2020-02-04 重庆科克发动机技术有限公司 一种可调空燃比的混合器
WO2020118228A3 (fr) * 2018-12-07 2020-07-23 Produced Water Absorbents Inc. Mélangeur pour l'injection multi-fluide et procédés associés
CN113187591A (zh) * 2021-06-16 2021-07-30 一汽解放汽车有限公司 发动机scr后处理器的可变混合器及其控制方法

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB123360A (en) * 1918-01-16 1919-02-27 Joseph Maina Improvements in Air and Gas Mixing Chambers for Internal Combustion Engines.
US1366959A (en) * 1919-08-01 1921-02-01 Stanley A Broza Carbureter
DE818593C (de) * 1942-03-01 1951-10-25 Daimler Benz Ag Mischer fuer Luft und Gas zum Betrieb von insbesondere mit Generatorgas betriebenen Kraftfahrzeug-Brennkraftmaschinen
CH585064A5 (en) * 1974-10-08 1977-02-28 Lenzburg Sauerstoffwerk Ag Mixing nozzle for balloon gases - e.g. air and helium, having variable mixture ratio control valve
DE2708824A1 (de) * 1977-03-01 1978-09-07 Siemens Ag Vorrichtung zum dosieren und mischen von brenngas und luft fuer den betrieb von brennkraftmaschinen
US4991561A (en) * 1990-02-02 1991-02-12 N I S Pri Vtu "Angel Kantschev" Gas-air mixer
WO1999019057A1 (fr) * 1997-10-14 1999-04-22 Kvaerner Pulping Ab Procede et appareil permettant d'introduire un premier fluide dans un deuxieme fluide
US20060153002A1 (en) * 2005-01-10 2006-07-13 Mr. Peter Ryan Jet Mixer With Adjustable Orifices
US20070074452A1 (en) * 2005-09-30 2007-04-05 Continental Controls Corporation Gaseous fuel and air mixing venturi device and method for carburetor

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE308561C (fr) *
NL60784C (fr) * 1942-02-13 1947-10-15

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB123360A (en) * 1918-01-16 1919-02-27 Joseph Maina Improvements in Air and Gas Mixing Chambers for Internal Combustion Engines.
US1366959A (en) * 1919-08-01 1921-02-01 Stanley A Broza Carbureter
DE818593C (de) * 1942-03-01 1951-10-25 Daimler Benz Ag Mischer fuer Luft und Gas zum Betrieb von insbesondere mit Generatorgas betriebenen Kraftfahrzeug-Brennkraftmaschinen
CH585064A5 (en) * 1974-10-08 1977-02-28 Lenzburg Sauerstoffwerk Ag Mixing nozzle for balloon gases - e.g. air and helium, having variable mixture ratio control valve
DE2708824A1 (de) * 1977-03-01 1978-09-07 Siemens Ag Vorrichtung zum dosieren und mischen von brenngas und luft fuer den betrieb von brennkraftmaschinen
US4991561A (en) * 1990-02-02 1991-02-12 N I S Pri Vtu "Angel Kantschev" Gas-air mixer
WO1999019057A1 (fr) * 1997-10-14 1999-04-22 Kvaerner Pulping Ab Procede et appareil permettant d'introduire un premier fluide dans un deuxieme fluide
US20060153002A1 (en) * 2005-01-10 2006-07-13 Mr. Peter Ryan Jet Mixer With Adjustable Orifices
US20070074452A1 (en) * 2005-09-30 2007-04-05 Continental Controls Corporation Gaseous fuel and air mixing venturi device and method for carburetor

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011076106A1 (de) 2011-05-19 2012-11-22 Mtu Friedrichshafen Gmbh Gasmischer, Gasmischsystem, Gasmotor
US8939129B2 (en) 2011-05-19 2015-01-27 Mtu Friedrichshafen Gmbh Gas mixer, gas mixing system, gas engine
WO2012156077A1 (fr) 2011-05-19 2012-11-22 Mtu Friedrichshafen Gmbh Mélangeur de gaz, système de mélange de gaz et moteur à gaz
US9726116B2 (en) 2011-11-14 2017-08-08 Mtu Friedrichshafen Gmbh Gas mixer and gas mixing system
DE102011086321A1 (de) * 2011-11-14 2013-05-16 Mtu Friedrichshafen Gmbh Gasmischer und Gasmischsystem
DE102011086321B4 (de) * 2011-11-14 2013-07-25 Mtu Friedrichshafen Gmbh Gasmischer und Gasmischsystem
EP2821130A3 (fr) * 2013-07-02 2015-04-22 Johnson Electric S.A. Mélangeur Venturi
GB2544325A (en) * 2015-11-13 2017-05-17 Caterpillar Energy Solutions Gmbh A mixer with variable diameter body in venturi
DE102016121006A1 (de) 2015-11-13 2017-05-18 Caterpillar Energy Solutions Gmbh Mischer mit einem Körper variablen Durchmessers im Venturi
GB2544325B (en) * 2015-11-13 2017-11-22 Caterpillar Energy Solutions Gmbh A mixer with variable diameter body in venturi
CN110748440A (zh) * 2018-07-23 2020-02-04 重庆科克发动机技术有限公司 一种可调空燃比的混合器
WO2020118228A3 (fr) * 2018-12-07 2020-07-23 Produced Water Absorbents Inc. Mélangeur pour l'injection multi-fluide et procédés associés
US11673104B2 (en) 2018-12-07 2023-06-13 Produced Water Absorbents Inc. Multi-fluid injection mixer and related methods
CN113187591A (zh) * 2021-06-16 2021-07-30 一汽解放汽车有限公司 发动机scr后处理器的可变混合器及其控制方法
CN113187591B (zh) * 2021-06-16 2022-08-23 一汽解放汽车有限公司 发动机scr后处理器的可变混合器及其控制方法

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Publication number Publication date
EP2016994A3 (fr) 2009-04-01
DE102007033627A1 (de) 2009-01-22

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