EP2974787A2 - Melangeur statique - Google Patents

Melangeur statique Download PDF

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Publication number
EP2974787A2
EP2974787A2 EP15172656.9A EP15172656A EP2974787A2 EP 2974787 A2 EP2974787 A2 EP 2974787A2 EP 15172656 A EP15172656 A EP 15172656A EP 2974787 A2 EP2974787 A2 EP 2974787A2
Authority
EP
European Patent Office
Prior art keywords
blade
perforation
vane
mixer according
exhaust gas
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Withdrawn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
EP15172656.9A
Other languages
German (de)
English (en)
Other versions
EP2974787A3 (fr
Inventor
Andreas Resch
Silvia Calvo
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.)
Eberspaecher Exhaust Technology GmbH and Co KG
Original Assignee
Eberspaecher Exhaust Technology GmbH and Co KG
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 Eberspaecher Exhaust Technology GmbH and Co KG filed Critical Eberspaecher Exhaust Technology GmbH and Co KG
Publication of EP2974787A2 publication Critical patent/EP2974787A2/fr
Publication of EP2974787A3 publication Critical patent/EP2974787A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
    • 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
    • B01F23/12—Mixing gases with gases with vaporisation of a liquid
    • 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
    • B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
    • B01F25/3131—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit with additional mixing means other than injector mixers, e.g. screens, baffles or rotating elements
    • 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
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • 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
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4315—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being deformed flat pieces of material
    • 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
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4316—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being flat pieces of material, e.g. intermeshing, fixed to the wall or fixed on a central rod
    • 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
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/43197—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor characterised by the mounting of the baffles or obstructions
    • B01F25/431974—Support members, e.g. tubular collars, with projecting baffles fitted inside the mixing tube or adjacent to the inner wall
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/20—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a flow director or deflector
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/103—Oxidation catalysts for HC and CO only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]

Definitions

  • the present invention relates to a static mixer for an exhaust system for mixing a reducing agent with an exhaust gas flow, having the features of the preamble of claim 1.
  • the invention also relates to an exhaust system equipped with such a mixer.
  • a fuel may be introduced into the exhaust flow to increase the heat of the exhaust flow by reacting the fuel in the oxidation catalyst, for example, to heat a downstream particulate filter to its regeneration temperature.
  • aqueous urea solution upstream of an SCR catalyst into the exhaust gas flow, where SCR stands for Selective Catalytic Reduction.
  • a static mixer which has a plurality of guide vanes for deflecting the exhaust gas flow.
  • the guide vanes protrude into the exhaust gas flow and are set in relation to the exhaust gas flow in order to be able to effect the respective deflection of the exhaust gas flow.
  • the guide vanes simultaneously form impact surfaces for the reducing agent introduced in liquid form.
  • they By acting on the vanes with the exhaust gas flow, they have a relatively high temperature, so that the vanes serve simultaneously as evaporation surfaces for reducing agent deposited thereon.
  • the largest possible impact surface on the one hand and the most intensive flow deflection on the other hand each have an increased flow resistance of the mixer result.
  • the flow resistance of the mixer causes a pressure increase in the exhaust system upstream of the mixer, which reduces the performance of an engine equipped with the exhaust system and increases their fuel consumption.
  • the present invention is concerned with the problem of providing for a static mixer of the aforementioned type or for an exhaust system equipped therewith an improved embodiment, which is characterized in particular by a comparatively low flow resistance, while at the same time realizes a sufficient mixing and in particular a sufficient evaporation can be.
  • the invention is based on the general idea of equipping at least one of the guide vanes, preferably all guide vanes, in each case with a perforation which can be flowed through by the exhaust gas, that is to say by a part of the exhaust gas flow. It has been found that such perforation can significantly reduce the flow resistance of the mixer while at the same time generating sufficient turbulence through the perforation to effect the desired intensive mixing.
  • perforation is understood to be any interruption of a structure of the guide blade that is otherwise closed or impermeable to exhaust gas.
  • perforation in particular in the case of openings, breakthroughs, exhibitions and the like, each is a perforation.
  • the perforation of the respective guide blade can have a plurality of passage openings, which are arranged in each case within a peripheral outer contour of the respective guide blade according to a preferred embodiment.
  • the respective vane has an outer contour that is not affected by the passage openings. In this way, the flow guiding function of the respective guide vanes is only comparatively slightly impaired by the perforation.
  • the passage openings may have a round or an angular cross-section.
  • the passage openings may be a point-like or an elongated cross-section exhibit.
  • Through openings with an oblong cross section may be rectilinear or simply curved or multiply curved.
  • the passage openings may each have an elongated cross section and be arranged side by side parallel to one another and along a blade length measured from a blade root to a blade tip of the respective guide blade.
  • a low flow resistance for the respective vane may show with sufficient or improved mixing effect.
  • the passage openings with their elongate cross sections can be arranged inclined to the blade length and inclined to a blade width measured from a leading edge to an outflow edge of the respective guide blade. This measure can also influence and optimize the mixing effect.
  • the perforation can have at least one or more passage openings which are open at the side at an outflow edge or at a leading edge of the respective guide blade.
  • these laterally or peripherally open passage openings influence an edge-side outer contour of the respective guide blade.
  • this can be used to selectively generate flow separations and vortices, which can have an advantageous effect on intensive mixing.
  • all passage openings of the perforation at the trailing edge or at the leading edge are laterally open.
  • the perforation has at least one passage opening open at the outer contour of the guide blade and at least one passage opening located completely within the outer contour.
  • the laterally open passage openings may be oblong and inclined with respect to a blade length of the guide blade and with respect to a blade width of the guide blade.
  • the blade length extends from a blade root to a blade tip as the blade width extends from the leading edge to the trailing edge.
  • the laterally open passage openings of the leading edge with respect to the blade length may be inclined in opposite directions to the passage openings of the trailing edge. This makes it possible to optimize the flow guidance of the guide vanes with regard to improved mixing.
  • the perforation in at least one of the vanes may be formed from a single passage.
  • Such a singular passage opening is expediently larger in terms of its flow cross-section than the individual passage openings of the perforations explained above, which are formed by a plurality of passage openings. Accordingly, such a perforation has a reduced flow resistance.
  • this singular passage opening can be arranged within a peripheral outer contour of the respective guide blade.
  • the passage opening does not influence the outer contour of the guide blade.
  • the singular passage opening can be elongated. In this case, it can essentially extend from a blade root to a blade tip.
  • the passage opening can be designed tapering, wherein the tip The passage opening can then be arranged in the region of the blade tip.
  • the passage opening can also be equipped with a constant width.
  • the singular passage opening it is also possible for the singular passage opening to be designed laterally open on a blade tip of the respective guide blade. If this singular, laterally open passage opening is also designed to be elongated, a division of the guide blade in the region of the passage opening can thus be achieved. Such a passage opening which is open in the region of the blade tip can lead to a particularly low flow resistance in the region of the respective guide blade.
  • the respective vane along its blade length may have a single or multiple curved course. While the vanes are usually designed to be rectilinear, it is now proposed to equip the respective vane with a curved with respect to their longitudinal central axis course.
  • the longitudinal central axis of the respective guide blade extends from the blade root to the blade tip approximately centrally with respect to the blade width.
  • a simply curved guide vane is then designed sickle-shaped.
  • a doubly curved vane is then configured S-shaped.
  • the respective vane may have a torsion with respect to its longitudinal central axis, which leads along the blade length to a varying angle of attack.
  • the mixer may have a cylindrical tubular body which encloses a flow cross-section through which the exhaust gas flow can flow in the circumferential direction and from which the guide vanes protrude inwards.
  • the guide vanes can be arranged free-standing radially in the region of their blade tips in this design be. Further, the vanes may be arranged relative to each other without contact.
  • the tubular body is made with all the guide vanes of a single sheet metal body by forming.
  • the mixer can be produced relatively inexpensively by stamping and forming operations.
  • the perforation may have at least one passage opening with an opening edge which is free-standing along its entire circulation.
  • a freestanding opening edge can be produced particularly easily by means of a punching process in the case of a guide blade designed as a sheet metal body.
  • the circulation is completely closed when the respective passage opening is arranged within the outer contour of the guide vane.
  • the passage opening on the outer contour of the guide vane is designed to be open at the side, the circulation of the opening edge on the outer contour is interrupted.
  • all passage openings of the respective vane are equipped with such a freestanding opening edge.
  • the perforation can have at least one passage opening with an opening edge which is connected to an exhibitor along a circulating section.
  • the issuer can at least partially cover the associated passage opening. Additionally or alternatively, the issuer may be inclined to an adjacent portion of the vane. Additionally or alternatively, the issuer may be at least partially offset from an adjacent portion of the vanes.
  • the arrangement of the exhibitor is preferred so that the exhibitor the passage opening at least partially covered and, accordingly, causes a flow deflection of a passing through the passage opening exhaust gas flow.
  • Such an issuer at the opening edge of the passage opening improves the mixing effect of the guide vane. At the same time can be reduced by the flow control with the exhibitor, the flow resistance.
  • the issuer is integrally formed on the respective vane.
  • the respective exhibitor can be an area of the respective guide blade which has been cut free and flared for producing the respective passage opening.
  • the respective vane can be particularly easy to equip with the passages and adjacent exhibitors.
  • At least one such exhibitor is designed as a wing, which is connected to the respective guide blade on only one side and, moreover, is arranged free-standing to the respective guide blade.
  • a wing acts as a flow guide element, so that the flow through the respective passage opening can be influenced in a particularly favorable manner with the aid of such a wing.
  • At least one such issuer is formed by a step, which in a blade longitudinal direction of a in the respective vane trained (other) step is spaced.
  • the respective step can be produced by double angling, preferably by about 90 °, of the vane transversely to its longitudinal direction.
  • the mixer presented here is heated in the operation of the exhaust system exclusively by the exhaust gas flow, so that he works without external energy in terms of its evaporation effect.
  • an injector for introducing a liquid reducing agent is provided in the exhaust gas flow, wherein also at least one mixer of the type described above with respect to the exhaust gas flow downstream of this injector is arranged.
  • the exhaust system may further include an SCR catalyst downstream of the mixer or an oxidation catalyst downstream of the mixer.
  • an internal combustion engine 1 comprises an engine block 2, which in each case contains a combustion chamber 4 in a plurality of cylinders 3.
  • pistons not shown here are arranged such that they can be adjusted in terms of stroke, so that the internal combustion engine 1 is a piston engine.
  • a fresh air system 5 is provided to supply the combustion chambers 4 with fresh air.
  • a corresponding fresh air flow 6 is indicated by an arrow.
  • the internal combustion engine 1 is also equipped with an exhaust system 7.
  • An exhaust gas flow 8 is indicated by an arrow.
  • the exhaust system 7 is equipped with an SCR system 9, which has an injector 10 for introducing a liquid reducing agent into the exhaust gas flow 8, an SCR catalyst 11 for reducing nitrogen oxides with the aid of the previously injected reducing agent and a static mixer 12.
  • the SCR catalytic converter 11 is arranged downstream of the injector 10.
  • the mixer 12 is disposed downstream of the injector 10 and upstream of the SCR catalyst 11 with respect to the flow direction of the exhaust gas flow 8.
  • the exhaust system 7 has an exhaust system 13, in which the aforementioned components of the SCR system 9 are integrated.
  • the mixer 12 has a plurality of guide vanes 14 which each serve to deflect the exhaust gas flow 8.
  • the mixer 12 also has a cylindrical tubular body 15 which encloses a flow cross section 16 through which the exhaust gas flow 8 can flow in the circumferential direction 17.
  • the circumferential direction 17 refers to a longitudinal central axis 18 of the tubular body 15 and the mixer 12.
  • the guide vanes 14 are inwardly, ie in the direction of the longitudinal central axis 18 from.
  • an extension direction of the respective vane 14 has at least one radial component. Furthermore, this extension direction can optionally also have an axial component.
  • this tubular body 15 is made integral with the vanes 14 of a single sheet metal body 19, namely by forming, so that it is the mixer 12 ultimately a single sheet metal part.
  • a development of the sheet metal body 19 and the mixer 12 is in Fig. 4 played.
  • the sheet metal body 19 has a jacket portion 20 which forms the tubular body 15 in the formed state. From this shell portion 20 are the vanes 14 from. In the settlement of the Fig. 4 the individual vanes 14 are already cut free, with individual sections are designated 21. The cuts 21 go over the shell portion 20 in round holes 22 in order to avoid cracking at this transition.
  • the blades 14 are each bent over a bending edge 23 and the shell portion 20 is bent around the longitudinal central axis 18 of the mixer 12 in the circumferential direction 17.
  • longitudinal ends 24 of the shell portion 20 on the tubular body 15 in the circumferential direction 17 form a shock and are attached to each other.
  • the guide vanes 14 are formed in the example shown here of the mixer 12 exclusively on a flow side of the tubular body 15.
  • the exhaust gas flow 8 is indicated by a flow arrow.
  • an embodiment is conceivable in which all the guide vanes 14 are arranged on a downstream side of the tubular body 15.
  • the use of two mixers 12 is conceivable, which are arranged one behind the other in the flow direction of the exhaust gas flow 8.
  • At least one of the guide vanes 14 is equipped with a perforation 25.
  • the perforation 25 is configured in such a way that it passes through the otherwise closed guide blade 14, so that the guide blade 14 can be flowed through by the respective perforation 25 from the exhaust gas flow 8 or from partial flows of the exhaust gas flow 8.
  • not all of the vanes 14 are provided with such a perforation 25, an embodiment is preferred in which all the guide vanes 14 have such a perforation 25.
  • the perforated vanes 14 each have an identical perforation 25.
  • the respective perforation 25 may have a plurality of passage openings 26, which are arranged within a peripheral outer contour 27 of the respective guide blade 14.
  • the Fig. 5 to 10 . 15 and 18 show embodiments in which all passage openings 26 of the perforation 25 are arranged within the outer contour 27 of the guide vane 14.
  • all passage openings 26 are provided with a round and punctiform cross-section.
  • the passage openings 26 each have a circular cross-section.
  • the passage openings 26 are elongated and rectilinear. Furthermore, they extend parallel to each other. Furthermore, the parallel arranged passage openings 26 are arranged side by side along a blade length 28. The blade length 28 is measured from a blade root 29 to a blade tip 30.
  • the Blade root 29 is arranged on the tubular body 15, while the blade tip 30 is arranged free-standing in the region of the longitudinal central axis 18.
  • FIG. 7 corresponds to in Fig. 6 shown embodiment, with the proviso that the passage openings 26 have different cross-sections.
  • Fig. 8 shows an embodiment in which the elongated passage openings 26 have a polygonal, here parallelogram cross-section. Furthermore, the passage openings 26 are arranged inclined with respect to their elongated cross section with respect to the blade length 28 and with respect to a blade width 31. The blade width 31 is measured from a leading edge 32 to an outflow edge 33 of the respective guide blade 14. In contrast, the elongated passage openings 26 in the examples of Fig. 6 and 7 oriented parallel to the blade width 31
  • Fig. 9 now shows an embodiment in which in the direction of the blade width 31 a plurality of elongate passage openings 26 are arranged one behind the other, which are also arranged offset to one another here in the direction of the blade length 28. Furthermore, the passage openings 26 are arranged alongside one another along the blade length 28 and are aligned parallel to one another and parallel to the blade width 31.
  • the passage openings 26 have at the in Fig. 9 shown perforation 25 clearly smaller flow-through cross-sections than in the embodiments of Fig. 5 to 8 ,
  • Fig. 10 shows an embodiment in which the passage openings 26 have an elongated cross-section and are simply curved. Regardless of the geometry and number of passages 26 shows Fig. 10
  • an embodiment in which the respective guide blade 14 along its blade length 28 has a double-curved course. Owns this the vane 14 with respect to its blade length 28 an S-shaped course.
  • the respective perforation 25 has a plurality of passage openings 26, which are laterally open at the leading edge 32 or at the trailing edge 33 of the respective guide blade 14.
  • the passage openings 26 influence the edge-side outer contour 27 of the guide vane 14.
  • all openings 26 of the perforation 25 designed laterally open.
  • all passage openings 26 are here elongated and provided with a quadrangular cross-section.
  • the arranged at the leading edge 32 through openings 26 are each arranged parallel to each other and with respect to the blade length 28 side by side.
  • passage openings 26 are arranged parallel to each other and in the blade length 28 side by side. Furthermore, the passage openings 26 shown here are aligned with respect to both the blade length 28 and the blade width 31. In this case, it is also provided that the passage openings 26 of the leading edge 32 with respect to the blade length 28 are oppositely inclined to the passage openings 26 of the trailing edge 33. In particular, they are arranged mirror-symmetrically with respect to a longitudinal center axis of the respective vane 14, whereby the perforation 25 shows a sweep and the Guide vane 25 is designed herringbone. The sweep of the perforation 25 is oriented towards the blade tip 30 for this purpose.
  • Fig. 16 only one single laterally open through opening 26 is provided at the leading edge 32 and at the outflow edge 33.
  • FIG. 5 to 11 . 15 . 17 and 18 each show perforations 25 which have a plurality of passage openings 26, show the Fig. 12 to 14 and 19, 20
  • this passage opening 26 is provided with an elongate cross section which is aligned parallel to the blade length 28.
  • the respective passage openings 26 extend over a substantial longitudinal section of the respective guide blade 14. In these examples, the respective passage opening 26 extends over at least 75% of the blade length 28.
  • FIG Fig. 12 has the passage opening 26 has a rectangular cross-section, while in the in Fig.
  • a triangular cross-section is provided.
  • Fig. 14 again a rectangular cross-section is provided.
  • Fig. 12 and 14 has the passage opening 26 along the blade length 28 a constant cross-section, while in Fig. 13 the cross section decreases in the direction of the blade tip 30.
  • the passage opening 26 may be arranged and / or dimensioned so that it is laterally open at the blade tip 30, whereby the guide blade 14 in the region of this passage opening 26 is shared.
  • the passage openings 26 are each equipped with an opening edge 34 which is free-standing along its entire circulation.
  • the respective circulation of the opening edge 24 is closed, while the circulation at the in Fig. 11 shown embodiment in which the passage openings 26 on the outer contour 27 are laterally open, in each case interrupted by the lateral opening of the respective passage openings 26.
  • the perforation 25 may have at least one passage opening 26, the opening edge 34 of which is connected to an issuer 35 along a circulating section.
  • This exhibitor 35 is in the Ausurugnsformen the Fig. 16 to 18 arranged inclined relative to an adjacent region of the respective guide blade 14.
  • the respective exhibitor 35 causes a cover at least part of the respective passage opening 26.
  • the Fig. 16 to 18 form at a rectangular passage opening 26 three consecutive rectilinear circulation sections each have a free opening edge 34, while the remaining fourth, rectilinear circulation section is then connected to the exhibitor 35, whereby the respective exhibitor 35 forms a wing 36.
  • the exhibitor 35 forms an area of the guide blade 14 which has been cut and exposed in the production of the respective passage opening 26.
  • the respective exhibitor 35 is integrally formed on the guide blade 14.
  • the perforation 25 has at least one passage opening 26 with an opening edge 34 which is connected along at least one circulation section with an exhibitor 35 which at least partially covers the associated passage opening 26 and / or inclined relative to an adjoining region of the guide blade 14 and / or staggered.
  • At least one such exhibitor 35 has a central region 36 and two lateral regions 37, wherein the central region 36 extends substantially parallel to the respective guide vane 14 and is connected via the two lateral regions 37 with the respective vane 14.
  • At least one such exhibitor 35 is designed as a wing 36, which is characterized in that it is connected to the respective vane 14 on only one side, while otherwise being arranged free-standing to the respective vane 14.
  • These wings 36 can be as in Fig. 16 be integrated into the outer contour 27, so that their passage openings 26seitseitlich are open. Likewise, in another embodiment, a distance to the outer contour 27 can be maintained.
  • Fig. 16 Two different geometries for the wings 36 are shown.
  • Fig. 17 shows further variants A, B, C and D for the geometric design of such wings 36. So shows Fig. 17A a straight-line wing 36.
  • FIG. 17B shows a wing 36 with a concave in the Ausstellraum profile.
  • Fig. 17C shows a wing 36 with a convex in the Ausstellraum curved profile.
  • Fig. 17D shows a wing 36 with an aerodynamically shaped profile, in particular drop profile.
  • Fig. 18 shows an example of an embodiment in which the perforation 25 by a plurality of different passage openings 26 with exhibitors 35 (left half in Fig. 18 ) and without exhibitors 35 (right half in Fig. 18 ), which also differ by different geometries and cross sections.
  • FIGS. 19 and 20 another embodiment for a particular perforation 25 is shown, in which the vane 15 is provided with a step 38 which is formed by means of two bending edges 39.
  • two other bending edges 40 are provided, which are arranged offset to the aforementioned Biegecardn 39 in a blade longitudinal direction 42 which is parallel to the blade length 28, and in which the guide vane 14 is bent in the opposite direction.
  • the exhibitor 35 forms a step 41, which is arranged offset in the blade longitudinal direction 42 to the stage 38 of the guide vane 14.
  • the mixer 12 is designed as a shaped sheet metal part, in another embodiment it can also be designed as a cast part or as a sintered part.
  • the respective perforation 25 is then incorporated appropriately later.
EP15172656.9A 2014-07-15 2015-06-18 Melangeur statique Withdrawn EP2974787A3 (fr)

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DE102014213746.2A DE102014213746A1 (de) 2014-07-15 2014-07-15 Statischer Mischer

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EP2974787A2 true EP2974787A2 (fr) 2016-01-20
EP2974787A3 EP2974787A3 (fr) 2016-03-30

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JP (1) JP2016020694A (fr)
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AU2017244041B2 (en) 2016-03-30 2022-12-01 Marine Canada Acquisition Inc. Vehicle heater and controls therefor
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KR102065340B1 (ko) * 2018-10-19 2020-01-13 이재욱 내연기관의 출력 증강을 위한 텐션형 와류용 판스프링을 설치한 배기장치
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CN109432978B (zh) * 2018-12-28 2023-05-02 启明星宇节能科技股份有限公司 一种脱硝烟气扰动装置
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EP2974787A3 (fr) 2016-03-30
CN105275551A (zh) 2016-01-27
JP2016020694A (ja) 2016-02-04
DE102014213746A1 (de) 2016-01-21
US20160017785A1 (en) 2016-01-21

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