CN104520549A - Method for mixing an exhaust gas flow - Google Patents

Method for mixing an exhaust gas flow Download PDF

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Publication number
CN104520549A
CN104520549A CN201380042168.2A CN201380042168A CN104520549A CN 104520549 A CN104520549 A CN 104520549A CN 201380042168 A CN201380042168 A CN 201380042168A CN 104520549 A CN104520549 A CN 104520549A
Authority
CN
China
Prior art keywords
hybrid element
mixer
hybrid
outlet pipe
fin
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.)
Granted
Application number
CN201380042168.2A
Other languages
Chinese (zh)
Other versions
CN104520549B (en
Inventor
京特·帕默尔
托拜厄斯·霍费尔
朱迪特·施沃贝尔
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.)
Tenneco Automotive Operating Co Inc
Original Assignee
Tenneco Automotive Operating Co Inc
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
Priority claimed from US13/571,542 external-priority patent/US8939638B2/en
Application filed by Tenneco Automotive Operating Co Inc filed Critical Tenneco Automotive Operating Co Inc
Priority to CN201710676165.4A priority Critical patent/CN107476859B/en
Publication of CN104520549A publication Critical patent/CN104520549A/en
Application granted granted Critical
Publication of CN104520549B publication Critical patent/CN104520549B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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]
    • 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
    • B01F23/20—Mixing gases with liquids
    • B01F23/21—Mixing gases with liquids by introducing liquids into gaseous media
    • B01F23/213—Mixing gases with liquids by introducing liquids into gaseous media by spraying or atomising of the liquids
    • B01F23/2132—Mixing gases with liquids by introducing liquids into gaseous media by spraying or atomising of the liquids using nozzles
    • 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
    • B01F25/314—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
    • B01F25/3141—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit with additional mixing means other than injector mixers
    • 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
    • B01F25/43197—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
    • 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
    • B01F25/432—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction with means for dividing the material flow into separate sub-flows and for repositioning and recombining these sub-flows; Cross-mixing, e.g. conducting the outer layer of the material nearer to the axis of the tube or vice-versa
    • B01F25/4322—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction with means for dividing the material flow into separate sub-flows and for repositioning and recombining these sub-flows; Cross-mixing, e.g. conducting the outer layer of the material nearer to the axis of the tube or vice-versa essentially composed of stacks of sheets, e.g. corrugated sheets
    • 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
    • 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
    • F01N2340/00—Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the apparatus; Spatial arrangements of exhaust apparatuses
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Dispersion Chemistry (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

A mixer for mixing an exhaust flow with a fluid injected into an exhaust pipe includes a first mixing element including a base interconnecting first and second sidewalls and a deflection element positioned to be impacted by the injected fluid as well as a mixing fin positioned downstream of the deflection element. A second mixing element includes first and second spaced apart mounting flanges fixed to inner surfaces of the first and second sidewalls. Alternately, the mixer includes first and second mixing elements positioned within circumferentially spaced apart slots axially extending from an open end of a tubular housing.

Description

For the method for mixing exhaust stream
Background of invention
2. prior art
Several unistage type mixer can be learnt according to the most immediate prior art.
In DE 10 2,006 024 778 B3, mixer is described to provide the wall construction for guide face, and it roughly fills the profile of housing, thus causes relatively high kinetic pressure losses.Wall construction is made up of the strip material being parallel to which floor fluctuating that flow direction aligns.Each layer extends transverse to flow direction respectively and is stacked on top of each other with being aligned making it transverse to flow direction.Here, the strip material in each layer is stacked on self top by this way, makes between the strip material of adjacent layer, formed multiple can at flow direction respectively separately by the unit flow through.
Except circle rises and falls, additionally provide the fluctuating of the strip material being designed to have rectangle or trapezoidal shape, thus the profile realizing unit is rectangle or Hexagon or has honeycomb shape.Strip material forms support, forms the paired guide face as mixing fin on the bracket.For this purpose, support comprises the region and the connected region without mixing fin alternately with mixing fin, thus a mixing fin extends in each unit.
In DE 20 2,006 017 848 U1, describe the device for mix waste gas, utilize described device, the fin unit that the fin arranged by directly following one another forms makes waste gas mixed.Fin unit is arranged in transverse to close to each other on flow direction, and in the flowing direction one in front and one in back.Fin is directly interconnected without the need to support and relative to central plane specular.
DE 10 2,005 059 971 A1 describes the equipment of the atm number stream of fluid and inflow gas passage mixing, particularly adds reducing agent to the waste gas containing nitrogen oxide.For this purpose, with for carrying the nozzle spray gun with nozzle of fluid to be used, the axle of described nozzle spray gun and the flow direction angulation of tolerance stream.Nozzle be assigned with one with the flow direction angulation of tolerance stream and with the flat mixer element in space.Vortex type is formed on hybrid element, and fluid enters these eddy current at least partially.For avoiding the formation of wall built-up, being set to the nozzle spray gun when liquid is used as fluid and being furnished with at least two flow directions favouring tolerance stream and in the opposite direction to the atomizer nozzle inclined towards each other.Atomizer nozzle is assigned to a disc type mixer element, thus can be separated the gaseous parts of evaporation and the drop part of non-evaporation.
DE 10 2,006 043 225 A1 describes the venting gas appliance of the burning machine of the outlet pipe with directing exhaust gas and injection device fluid being injected outlet pipe.In the downstream of injection device, the longitudinal direction being included in outlet pipe is set in outlet pipe and extends and promote the evaporation unit of at least one tubulose plate body of the evaporation of injecting liquid.In addition, the spring clamp device being fixed to by evaporating plant in outlet pipe or itself and described outlet pipe being strained is provided with.
As immediate prior art, DE 10 2,005 052 064 A1 describes the vent systems with reducing agent injection device, the wherein downstream of injection device, arranges the longitudinal extension that comprises along outlet pipe and both sides are all exposed to the plate body of at least one wall in exhaust stream.Reducing agent is sprayed onto on wall at least in part, thus converts liquid reducer to steam or gaseous state.
1. technical field
The present invention relates to mixer using method and mixer itself.
Summary of the invention
Design of the present invention is to provide a kind of method that shape according to outlet pipe makes the mixability of exhaust and fluid increase.
Solution is that wherein fluid is injected into outlet pipe by injection device, it is characterized in that following methods step by the method for the fluid chemical field in the outlet pipe of exhaust stream and vent systems:
A) directed in the region of injection device on the direction of flowing being parallel to the outlet pipe in outlet pipe of exhaust stream,
B) fluid is injected into along with the central direction of the injection of se angle deviating flow direction, and be directly injected on the diverter element that is arranged in outlet pipe,
C) by be arranged on diverter element and with reference to flow direction at least in part with at least one metal plate component that sv angle rises, exhaust stream is partly diverted to the central direction of shunting with reference to flow direction from flow direction.
D) before and after shock diverter element, fluid is carried along point flow path direction by the diversion component of exhaust stream at least in part, and by rising metal plate component water conservancy diversion to a point flow path direction.Here, it is essential, exhaust stream was entered a point flow path direction by metal plate component water conservancy diversion before mixer, and described exhaust stream significantly deviates from the flow direction.The direction angle se that fluid is injected into here can change between 270 ° and 360 °.
Therefore, the fluid be injected into from side is transported by centrally direction and is full of the whole profile of outlet pipe, afterwards correspondingly at the whole profile impingement mix device of mixer, then mixes with exhaust stream.Even if because installing space, outlet pipe be not straight but bending time, the impact that fluid motion direction is subject to the diverter element relevant to the progression of outlet pipe is also favourable.
A further idea is, fluid clashed into correcting plate at least in part before metal plate component, this correcting plate is arranged with reference to injection direction, and experience water conservancy diversion at least in part and enter flow direction, then be there is the static mixer water conservancy diversion of at least one hybrid element to several hybrid directional, thus be further mixed.Correcting plate is roughly arranged in above metal plate component and is parallel to metal plate component, is distributed in the side of the metal plate component that fluid injects.When fluid stream other parts to arrive before metal plate component by correcting plate from injection direction water conservancy diversion to flow direction time, the fluid distrbution before mixer increases.
Advantageously, realize rising with the angle being same or different from sv of metal plate component by multiple fin be arranged on metal plate component, wherein angle sv is between 0 ° and 85 °.Because fin rises, metal plate component can be arranged as and itself be parallel to flow direction, thus only has fin to guarantee the generation of the necessary water conservancy diversion of exhaust stream, thus ensures the generation of the necessary water conservancy diversion of fluid.
Another advantageously, correcting plate is included in multiple borings that boring direction extends, and wherein boring direction extends with the angle bs between 45 ° and 135 ° with reference to flow direction.Thus, a part for fluid can be distributed in the profile of mixer further by one or more correcting plate.Thus fluid partly can flow into injection device and further partly by correcting plate water conservancy diversion.The accumulation part of fluid is by further water conservancy diversion and transported by the direction along flowing, and arrives next correcting plate through the non-accumulated part of the fluid of boring along the direction injected or the direction of metal plate component.
Correcting plate is arranged to and is parallel to flow direction and comprises multiple correction fin risen with angle sk with reference to flow direction, and wherein angle sk is between 95 ° and 265 °.Correcting plate stamps out correction fin, thus the opening that the fluid do not accumulated is formed by punching press flows through correcting plate.Meanwhile, fluid is by correcting fin stabilization, thus compared to above-mentioned flowing state, fluid is in the flowing direction more slowly by exhaust stream water conservancy diversion.
Hybrid element arranges multiple fin rising with angle ms with reference to flow direction and rise with angle mv with reference to point flow path direction, and wherein angle ms is 70 ° to the maximum, and angle mv is greater than 1 °.For mixed process, the advantageously further mixed fin flow guiding of fluid, and the equidirectional that can not determine at fin or correction fin is guided further.
For the method, directing exhaust gas stream and be favourable for the diverter element be arranged in the outlet pipe of vent systems, and described diverter element injects the liquid of vent systems for being maintained by injection device, wherein diverter element can be located by along flow direction before the static mixer of metal plate component with at least one hybrid element, and comprise at least one and can be located in metal plate component in exhaust stream, wherein said metal plate component rises with angle sv with reference to flow direction at least in part on point flow path direction, exhaust stream is entered a point flow path direction by from flow direction water conservancy diversion at least in part together with fluid thus.Be formed on metal plate component with the fin that angle sv rises.Realize symmetrical shunting to realize at outlet pipe profile and having changed in the whole mixer profile of the fluid of gaseous state in part thus, metal plate component is before flow direction is directly arranged in mixer.Gaseous parts is less, and the impact of diverter element on the mixed process of mixer is larger.On point flow path direction, metal plate component relative to flow direction with angle sv by fin lifting at least in part, exhaust stream is guided to a point flow path direction from flow direction at least in part together with fluid thus.Be arranged to the metal plate component itself that is parallel to flow direction can be left in the basket for the impact of water conservancy diversion.
Metal plate component is formed the multiple fins risen with angle sv.Utilize multiple fin, realize the water conservancy diversion being distributed in the fluid of the profile of outlet pipe.Utilize the multiple fins in flow direction arranged in succession, what realize due to fin is partly accumulated at the water conservancy diversion of flow direction, and the water conservancy diversion of flow element increases.
Diverter element can be placed in outlet pipe in one way, makes fluid affect the direction of diverter element to a great extent.Thus, the first deflected element of speed of fluid reduces, and then therefore flow direction can more easily be changed.
According to exhaust quality stream and delivery temperature, in the depth of penetration of outlet pipe and fluid, the shock zone on diverter element changes fluid.
Diverter element comprises and is one or morely arranged to the correcting plate being parallel to flow direction or being parallel to metal plate component.Correcting plate enables fluid down and makes fluid comparatively early low water conservancy diversion by exhaust stream.Correcting plate can comprise different length or be designed to identical length.
Correcting plate comprises one or more with the correction fin of the angle sk rising between 95 ° and 265 ° and multiple opening transverse to flow direction formed by correction fin, and/or multiple boring boring the extension of dynamic direction, wherein boring direction is to extend with the angle bs between 40 ° and 135 ° with reference to flow direction.Alternately, provide multiple boring extended at boring direction, wherein boring direction is to extend with the angle bs between 45 ° and 135 ° relative to flow direction.Thus, a part for fluid can directly flow through opening or boring along its injection direction and not be decelerated.Realize the correction of flowing by correcting plate and stablize.
Metal plate component with reference to flowing opposite direction protrude past all correcting plates and metal plate component with reference to inject central direction be disposed in last correcting plate after.Because therefore metal plate component is arranged to the wall direct neighbor of the outlet pipe relative with decanting point, sheet metal elements can affect the whole amount of the fluid of injection.
Diverter element is designed to form the central plane specular at right angle about one and flow direction, or fin and/or correct fin and be arranged to about central plane specular.Because this is symmetrical, the center flow region of the outlet pipe that fluid injects can be affected, to a greater extent this is because center hybrid element or flow element have identical alignment thereof.
Advantageously, comprise the multi-stage diffluence device of diverter element according to described above and be fixed on diverter element or be indirectly arranged in the static mixer after diverter element by least one hybrid element, wherein hybrid element comprises at least one mixing fin support or a flow element.Due to the combination of diverter element and mixer, efficient mixed method is possible.
Metal plate component or correcting plate are disposed on support or are disposed in and be parallel to flow direction or with in flow direction flow element diagonally.Thus, mixer and diverter element are designed at least part of or also can form one completely and use identical material.
Mixing fin or flow element reference flow direction are with the angle ms up to 70 ° and to rise with the angle mv more than 1 ° with reference to point flow path direction.
Hybrid element is designed to about being arranged in the central plane specular at a right angle with flow direction, or mixing fin and/or support be arranged to about central plane specular.
According to application, advantageously hybrid element is designed to about flow direction point symmetry, or mixing fin and/or support be arranged to about flow direction point symmetry.Due to this layout, produce after the mixer of counterrotating vortex in outlet pipe.
For assembling or repacking, advantageously provide one be parallel to outlet pipe and be parallel to the housing in exhaust stream direction in addition, arrange support or flow element on the housing, and housing can be placed on outlet pipe or among.Thus, the hybrid element of mixer or flow element can be assembled in advance and be then inserted in outlet pipe in shell.
Advantageously, static mixer comprises and is multiplely arranged as the hybrid element for being vented transverse to flow direction and close to each other, and wherein each hybrid element comprises multiple mixing fin and each mixing fin comprises with reference to borderline region and two side border region after one of flow direction.Each hybrid element comprises the support with flow direction parallel alignment, and mixing fin passes through borderline region thereafter and arranges on the bracket and rise relative to support.Each support comprises two end regions, and corresponding support is fixed to outlet pipe by described end regions.At least provide three hybrid elements, the region between the support of described hybrid element is arranged in transverse to the end regions of flow direction is close each other, and distance is each other at least 5 millimeters.All mixing fins are arranged to and form a segment distance with the outlet pipe with all sides boundary region and front border region.Preferably, adjacent support has the distance between 5 millimeters and 100 millimeters, preferably between 12 millimeters and 15.5 millimeters.Thus, hybrid element can by the support on outlet pipe or the support in independent case soldered, even and if when increasing exhaust stream and heat input, also can keep the stability of hybrid element by being arranged in support on hybrid element and mixing fin.Due to each hybrid element insulating mounting and owing to be arranged in being spaced a segment distance in respective holder and in the face of the mixing fin of tube wall, to realize the fin circulation improved, thus improve mixed effect.
If static mixer comprises and is multiplely arranged as hybrid element transverse to flow direction and close to each other, and corresponding hybrid element comprises the support that is parallel to flow direction alignment and is multiplely arranged in the mixing fin risen on support and relative to support, then static mixer or shunt also can be favourable.Each support comprises two end regions and is arranged in two join domains between two end regions, facing with each other and spaced apart with end regions in holder orientation.First join domain of end regions and respective holder is connected to each other, thus the part area of support forms closed cell, and on the part area of the support around closed cell, at least two mixing fins are disposed on support.Thus, corresponding units is not closed by the part area of the support not arranging mixing fin, and is placed on the mixing fin front extending into unit.
For static mixer or shunt, advantageously mixer comprises and is arranged as transverse to flow direction and close to each other, for being vented multiple flow element.Corresponding flow element is formed by the sheet metal of the cross section profile with fluctuating, and described sheet metal is included in the direction being parallel to profile axle and extends and multiple passages close to each other.The profile axle of corresponding flow element with reference to flow direction with the angle ms of the highest 70 ° or the angle ms of high-70 ° is directed.Profile axle aligns with at least two flow element of the angle ms identical with size with direction layout close to each other.Thus, arrive mixer center and the flowing of fluid transverse to flow direction flowing is retained by two center flow elements substantially, these two center flow elements have identical alignment thereof and can be deflected in another direction.Cross-sectional profiles preferably rule rises and falls, and section axle is all arranged in parallel.
The mixer that the fluid injecting outlet pipe mixes with exhaust stream is comprised the first hybrid element, and described first hybrid element comprises the base of the second sidewall connecting the first side wall and interval.First and second sidewalls are configured to the size and dimension of the internal surface adapting to outlet pipe, make described sidewall be suitable for being fixed to outlet pipe.First hybrid element comprises the diverter element that is placed on the fluid impact injected and is placed on the mixing fin in diverter element downstream, with the fluid of mixing exhaust and injection.Second hybrid element comprises the interconnective base of the first and second mounting flanges that will separate.First and second mounting flanges are fixed on the internal surface of the first and second sidewalls.Second hybrid element comprises mixing fin, to change exhaust stream direction.
Another mixer that the fluid injecting outlet pipe mixes with exhaust stream is comprised tubular shell, and described tubular shell comprises from axially extended, the circumferentially spaced slot of the opening end of housing.First hybrid element comprises the core of the second periphery being interconnected the first periphery and interval.First periphery is placed in slot.Second periphery is placed in another in slot.Flange is fixed in housing.Second hybrid element comprises the interconnective core of the 4th periphery by the 3rd periphery and interval.Third and fourth periphery to be placed in other slot and to be fixed on housing.Second hybrid element and the first hybrid element spaced apart.
Other beneficial effects of the present invention and details illustrate and show in the accompanying drawings in Patent right requirement and specification.
Accompanying drawing explanation
Fig. 1 shows the view of a part for the vent systems with outlet pipe and injection device, and wherein mixer is arranged to the diverter element having and rise relative to flow direction;
Fig. 2 shows having mixer and having the view of diverter element of correcting plate according to Fig. 1;
Fig. 3 show according to Fig. 1 have mixer with the view of the diverter element of the similar patten's design of mixer;
Fig. 4 shows the mixer of specular;
Fig. 5 shows the point-symmetric mixer with hybrid element, and described hybrid element has unit;
Fig. 6 shows the mixer in outlet pipe according to Fig. 4;
Fig. 7 shows the point-symmetric mixer of the support had in a distance;
Fig. 8 shows the side view of the support with alternately upwards mixing fin;
Fig. 9 shows the side view with the mixer of diverter element according to Fig. 7, and described diverter element has correction fin;
Fig. 9 a shows the side view with the mixer of diverter element according to Fig. 7, and described diverter element has boring;
Figure 10 shows the view of the mixer with the flow element contacted with each other;
Figure 11 shows three flow element of the mixer according to Figure 10, and these three flow element are differently arranged relative to their respective profile axles;
Figure 12 shows the side view in the outlet pipe with preactivate diverter element of the mixer according to Figure 10;
Figure 13 shows the angle schematic diagram of diverter element and injection device;
Figure 14 shows the angle schematic diagram of mixing fin relative to diverter element;
Figure 15 is the perspective view of alternative mixer;
Figure 16 is another perspective view of alternative mixer;
Figure 17 is the end elevation of alternative mixer;
Figure 18 is the sectional view by the line 18-18 place in the mixer shown in Figure 17;
Figure 19 is the partial sectional view by the line 19-19 place shown in Figure 18;
Figure 20 is the side view of mixer;
Figure 21 is the perspective view of another alternative mixer;
Figure 22 is the perspective view of another alternative mixer;
Figure 23 is the fragmentary, perspective view of another alternative mixer;
Figure 24 is the partial end view of the mixer described in Figure 23;
Figure 25 is the perspective view of another alternative mixer;
Figure 26 is the perspective view of another angle of mixer described in Figure 25;
Figure 27 is the perspective exploded view of the mixer described in Figure 25 and 26; And
Figure 28 is the partial sectional view of a part for the exhaust-gas treatment system comprising another alternative mixer.
Embodiment
Fig. 1 shows the outlet pipe 40 as a part for vent systems 4, and by the flange 50 be arranged on outlet pipe 40 and the injection device 5 be positioned on flange 50, the fluid as reducing agent injects described outlet pipe along injection direction E.For clarity sake, accompanying drawing illustrates the mobility status of the central direction of injection direction E instead of real, the taper as shown in two " v " shape dotted lines in Fig. 3.
In outlet pipe 40, waste gas is roughly parallel to outlet pipe 40 streamwise S and flows.For in description of the invention, for simplicity suppose that the whole cross-section of pipeline of flow direction S at outlet pipe 40 before diverter element 6 is parallel.
Depend on the mass flow of reducing agent, reducing agent along injection direction E flow and flow into outlet pipe 40, more or less by exhaust stream water conservancy diversion.After injection device 5, the shunt be made up of the mixer 1 with diverter element 6 is arranged on flow direction S.Shunt is placed in outlet pipe 40 by mixer 1 and flange connections 41.
Reducing agent clashes into diverter element 6 to a great extent, thus the impact flow of reducing agent is reduced.Diverter element 6 rises with angle sv relative to flow direction S, thus exhaust stream is diversed to a point flow path direction V from flow direction S by diverter element 6.Due to diversed exhaust stream, reducing agent partly its to clash into before diverter element 6 and mainly after it clashes into diverter element 6 along dividing a flow path direction V to be pulled away, and be directed to the tube hub of outlet pipe 40.
Fig. 2 shows a part for the vent systems 4 described with reference to Fig. 1, but as totally illustrated in greater detail in Fig. 4 to 7, the mixer 1 with mixing fin 31 is integrated into wherein.The diverter element 6 for this kind with the mixer 1 of mixing fin 31 is described in detail in fig .9, and comprise as diverter element 6 part and be arranged to the metal plate component 60 being parallel to flow direction, described metal plate component has with the fin 61 of angle sv rising and comprises the correcting plate 62 having and correct fin 64 further.
According to Fig. 4, the mixer 1 of 6 and 7 comprises to be arranged and three close separately from each other hybrid elements 3 transverse to flow direction S, and one or two additional hybrid element 3a.Hybrid element 3 and 3a are primarily of support 30,30a and one or more mixing fin 31,31a disposed thereon composition.Corresponding mixing fin 31,31a is fixed on support 30,30a by referring to the fringe region hR of flow direction S.The side edge region sR of reference flow direction S and front edge area vR forms free-flow edge and had both been not attached to another mixing fin 31,31a, is also not attached to housing 2 or outlet pipe 40.
Support 30 comprises two end regions 34 respectively at its two ends, and one of them end regions 34 does not provide mixing fin 31 and according to Fig. 7 angulation.Support 30 is fixed on housing 2 or according to Fig. 6 by two end regions 34 as shown in the example in Fig. 7 and is fixed on outlet pipe 40.Between two end regions 34, support 30 is free suspension in housing 2 or outlet pipe 40, and namely it is neither supported by other structural elements or fixes, and does not also support or fixes other structural elements.In addition, the region of support 30 between end regions 34 is roughly arranged to and is parallel to each other, and the distance 35 of spaced about 13.5 millimeters.
Housing 2 is cylindrical tube parts, and hybrid element 3 is fixed on the inner sheath surface 20 of described housing 2, and according to the fixing additional hybrid element 3a of illustrative embodiments.As shown in Figure 2, such mixer 1 is inserted in the outlet pipe 40 of vent systems 4 together with housing 2, and exhaust stream flows through described mixer 1 with the flow direction S of the central shaft 23 being parallel to housing 2.
Support 30 is made up of the belt metal material with the width 32 limited in Fig. 8 and is parallel to flow direction S and aligns.Flow direction S refers to the main flow direction of exhaust stream in mixer 1, and is parallel to the central shaft 12 of mixer 1 and the central shaft 23 of housing 2.Be parallel to flow direction S due to support 30 and be therefore parallel to the wall of outlet pipe 40, therefore mixer 1 can be installed to be simply transverse to flow direction in outlet pipe 40.
In the exemplary embodiment according to fig. 7, three be roughly arranged to parallel to each other near and point-symmetric hybrid element 3, each hybrid element 3 by support 30 and four mixing fins 31 formed.Therefore, whole hybrid element 3 is made up of support 30 and four mixing fins 31.
Support 30 can be divided into three part areas 36 to 38 between end regions 34.Territory, outer subsectors 37,38 adjoins the core region 36 of opposite side respectively.Territory, each outer subsectors 37,38 is relative to core region 36 angulation, and namely core region 36 comprises and territory, two outer subsectors 37, each the angle α formed in 38.Therefore cut with the angle α of about 12 ° with reference to the first axle 11, two territories, outer subsectors 37,38 being parallel to flow direction S and wear core region 36.Territory, outer subsectors 37,38 forms contrary angle about core region 36, thus support 30 is designed to central shaft 12 point symmetry about being parallel to flow direction S, and namely support 30 and mixing fin 31 are formed in point symmetry to each other and arrange.
Except three hybrid elements, 3, two additional hybrid element 3a are also arranged on the other region of hybrid element 3.Additional hybrid element 3a is formed by support 30a and mixing fin 31a.Additional hybrid element 3a is fixed on the inner sheath surface 20 of housing 2 by two end regions 34a, and the mode with free support between two end regions 34a is fixed.
According to the illustrative embodiments of Fig. 4, support 30 can be divided into three part areas 36 to 38 according to the illustrative embodiments of Fig. 7.Territory, outer subsectors 37,38 adjoins the core region 36 of opposite side separately.Territory, each outer subsectors 37,38 is relative to core region 36 angulation, and namely core region 36 comprises and territory, two outer subsectors 37, each the angle α formed in 38.Therefore cut with the angle γ of about 9 ° with reference to the first axle 11, two territories, outer subsectors 37,38 being parallel to flow direction S and wear core region 36.Territory, outer subsectors 37,38 is about core region 36 angulation in a same direction, thus support 30 is designed to central plane 10 specular about being parallel to flow direction S.
Due to point symmetry, the fluid of central plane 10 side is by upward and outward water conservancy diversion, and contrary, the fluid of central plane 10 opposite side is along the direction water conservancy diversion transverse to flow direction S.Arrow in Fig. 7 represents fluid.
In the illustrative embodiments of Fig. 4 to 9a, mixing fin 31 comprises with reference to the angle β in the direction of the support 30 and angle ms with reference to flow direction S.Mixing fin 31 Alternation Display.As shown in more detailed in Fig. 8 and 9, angle β is+135 ° or-135 °, and angle ms is+45 ° or-45 °.In addition, particularly as shown in Figure 7, the mixing fin 31 of direct neighbor partly comprises the distance of routine to each other 33 being at least 1 millimeter.
In unshowned illustrative embodiments, contiguous end regions 34 is interconnected by two supports 30 disposed adjacent one another.In addition, an end regions 34a of each additional hybrid element 3a is connected to an end regions 34 of each adjacent hybrid element 3.This is made up of single metal lath by three hybrid elements 3 and two additional hybrid element 3a and is realized.
As shown in figures 7 and 9, fastener 24 is arranged on the outside 21 of housing 2.Fastener 24 is designed to prominent joint and oppositely protrudes from outside 21.Due to fastener 24, mixer 1 can be fastened thus can not be rotated by around the central shaft 23 in outlet pipe 40.In addition, when specifying the rotational position with reference to the mixer 1 of the central shaft 23 in vent systems 4 while fastened, fastener 24 also serves this object.For this purpose, the corresponding holder do not illustrated in greater detail is arranged on certain position, and fastener 24 is pushed in described holder along central shaft 23 direction.
According to Fig. 9, mixer 1 is installed between two outlet pipes 40,40' together with housing 2.For this purpose, two outlet pipes 40,40' are attached to the both sides of housing 2.In order to weld two outlet pipes 40,40', and being welded to connect in order to outlet pipe 40,40' and mixer 1, gap 42 is arranged between outlet pipe 40,40'.Create gap 42 cause and be that outlet pipe 40,40' is spaced by the circumference of the adjustment element 22 shunted on the direction of central shaft 12, on described adjustment element, corresponding outlet pipe 40,40' adjoins side respectively on the direction of central shaft 12.
Be designed to about towards central plane 10 specular being parallel to flow direction S according to the mixer 1 of Fig. 4 and 6, namely support 30 and mixing fin 31 are mutually formed and arrange in specular ground.These mixers 1 comprise three and are arranged in parallel and hybrid element 3 close to each other, and wherein each hybrid element 3 is formed by support 30 and one or three the mixing fin 31 be arranged on support 30.
Support 30 can be divided into three part areas 36 to 38 between end regions 34.Territory, outer subsectors 37,38 adjoins the core region 36 of opposite side separately.Territory, each outer subsectors 37,38 is relative to core region 36 angulation, and namely core region 36 comprises and territory, two outer subsectors 37, each the angle γ formed in 38.Core region 36 is worn with reference to extending in parallel therefore to cut with the angle γ of about 9 ° in the first axle 11, two territories, outer subsectors 37,38 of flow direction S.Territory, outer subsectors 37,38 is about core region 36 angulation in a same direction, thus support 30 is designed to central shaft 12 specular about being parallel to flow direction S.
Center mixing fin 31 is included in the slit 39 at its center, and the length LS of described slit 39 is between 50% to 80% of the length LM of mixing fin 31.Due to slit 39, the formation of whirlpool is reduced, this is because the fluid of center region is by the water conservancy diversion of less degree.In addition, maximum in the mass flow of the center region of mixer 1, and reduce in the flow resistance of this region blender 1 just.
Except three hybrid elements 3, additional hybrid element 3a is also arranged on below three hybrid elements 3.Additional hybrid element 3a is formed by support 30a and mixing fin 31a and is comprised slit 39.Additional hybrid element 3a is fixed on the inner sheath surface 20 of housing 2 by two end regions 34a, and the mode with free support between two end regions 34a is fixed.
Fig. 5 shows the point symmetry mixer 1 with two same mixture elements 3,3'.Corresponding hybrid element 3,3' comprises two end regions 34,340 respectively and is arranged on end regions 34, two join domains 370,380 between 340.First join domain 370 of end regions 34 and corresponding support 30 is interconnected, thus the part area 301 of support 30 forms closed cell 300.On the part area 301 of the support 30 around unit 300, two mixing fins 31 are disposed on support 30.Hybrid element 3 is fixed on outlet pipe 40 by end regions 340 and the second join domain 380.
Point symmetry mixer 1 according to the illustrative embodiments in Fig. 5 and 7 can combine with diverter element 6 equally, and the specular mixer 1 according to the illustrative embodiments in Fig. 4 and 6 also can combine with diverter element 6.As shown in figs. 9 and 9, diverter element 6 comprises the metal plate component 60 had with one or more fins 61 of the angle sv of about 20 ° rising.Due to fin 61, exhaust stream along point flow path direction V by upwards water conservancy diversion, thus reducing agent is also upwards washed away.Metal plate component 60 is directly arranged on support 30,30a, and forms single-piece with hybrid element 3,3a and the structural element be made up of identical material according to illustrative embodiments.
Diverter element 6 comprises multiple being arranged to and is parallel to flow direction S and the correcting plate 62,62', 62 being parallel to metal plate component 60 ", described correcting plate causes reducing agent directly to be shunted before mixer 1.Correcting plate 62 is directly arranged on support 30,30a, and forms single-piece with hybrid element 3,3a and the structural element be made up of identical material according to illustrative embodiments.
According to Fig. 9, correcting plate 62,62', 62 " comprise multiple correction fin 64 risen with the angle sk of 155 ° with reference to flow direction S.As Figure 14 is shown specifically, correct fin 64 and partly stamped out correcting plate 62 and give prominence to from correcting plate 62 along the contiguous direction of correcting plate 62 and/or the direction of metal plate component 60.Therefore, below correction fin 64, the region that opening 63 is corresponding to the correction fin 64 given prominence to from correcting plate 62 is formed at corresponding correcting plate 62.Correct fin 64 to give prominence in the one or both sides of correcting plate 62.
Same, the fin 61 of metal plate component 60 is stamped out, thus metal plate component 60 comprises the opening 63 corresponded to from below the fin 61 in the region of the outstanding fin 61 of metal plate component 60.As shown in figure 14, correct fin 64 to give prominence to from the both sides of correcting plate 62 and fin 61 is given prominence to from the side of metal plate component 60.
According to Fig. 9, correcting plate 62,62', 62 " comprise multiple boring 65 but not correct fin; the boring direction B that described boring extends along the angle bs in 90 ° with flow direction S is directed; by described boring direction, the exhaust stream with reducing agent can flow through diverter element 6 in the direction of central shaft 12 at least in part.
Fig. 3 also show a part for the vent systems 4 as the description of Fig. 1 and 2, but in this exemplary embodiment, mixer 1 combines with the diverter element 6 built with the similar manner of mixer 1 own.Such mixer 1 is formed with the flow element 7,7' of multiple abutting adjacent one another are according to Figure 10.
Figure 11 illustrate in detail the flow element 7,7', 7 by multiple abutting adjacent one another are " form mixer 1." formed by the sheet metal 70 of the cross section profile 71 with fluctuating, described sheet metal comprises front side 73 and the multiple passages 72 in the direction being parallel to profile axle 74 extension adjacent one another are to corresponding flow element 7,7', 7.The profile axle 74,74' of two adjacent flow element 7,7' alternately extends with the angle ps of+40 ° and-40 ° with reference to flow direction S.Thus, fluid is by two flow element 7,7' simultaneously water conservancy diversion up and down in the channel.
But according to the present invention, two with reference to the close center flow element 7' of central plane 10,7 " profile axle 74', 74 " extend in parallel, namely with direction-40 ° angle pss identical with size, therefore abutting not adjacent one another are.Thus, as arrow in Figure 10 expressed, by two flow element 7', 7 " fluid in the passage formed only by upwards water conservancy diversion, namely with identical direction water conservancy diversion.Angle ps is equivalent to the angle ms in exemplary embodiment described above.
Due to reference to central plane 10 opposed two flow element 7' simultaneously close to each other, 7 " identical arrangement profile axle 74', 74 ", therefore mixer 1 is achieved with reference to the geometrical shape of the specular of central plane 10.The part of exhaust stream and flow into mixer 1 center reducing agent thus at these two flow element 7', 7 " in diversed along a direction.
Figure 12 shows the cross section of mixer 1, and wherein profile axle 74,74' is so that ± 30 ° of angles to rise.Before mixer 1, arrange the diverter element 6 built with mixer 1 similar manner.Utilize diverter element 6, multiple metal plate component 60 with cross-sectional profiles 66 is also directly by layout adjacent one another are.The profile axle 67,67' of the diverter element 6 of adjacent metal plate component 60 does not rise with reference to flow direction S, and namely they are parallel to flow direction S and extend.Therefore, diverter element 6 is corresponding to two center flow element 7' of mixer 1,7 " independent metal plate member 60 between form independently passage, wherein exhaust stream and reducing agent are guided by with the unique direction being parallel to flow direction S.
Figure 13 illustrates and represents correction fin 64, injection direction E, point above-mentioned angle of flow path direction V and flow direction S and the angle schematic diagram of angle ratios.Figure 14 shows about mixing fin 31 and sheet metal 70, and about dividing the general schematic view of flow path direction V and flow direction S.
Figure 15 to 20 depicts the alternative mixer identified with label 400.Mixer 400 comprises the first hybrid element 402, second hybrid element the 404, three hybrid element 406 and the 4th hybrid element 408.Each hybrid element 402,404,406,408 is fixed to one another that mixer 400 is provided as single piece component.First hybrid element 402 plays the effect of fixture or housing and hybrid element.For realizing this function, the first hybrid element 402 comprises and first curved wall 412 at the second curved wall 414 interval.The first side wall 412 and the second sidewall 414 are interconnected to limit " U " type by the base 416 of general planar.As shown in the figure, base 416 can be bending or comprise slight bending to provide bending flex point 415,417.The first side wall 412 comprises and the far-end 418 at far-end 419 interval of the second sidewall 414.Mixer 400 is placed in outlet pipe 40, makes end 418, aligns with injection device 5 in the gap in the middle of 419.The reagent that can flow along the internal surface of pipe 40 can not be restricted because of the existence of mixer wall, but can from end 418, and 419 intermediate flows are to downstream.
The diverter element 420 that integration is formed is roughly parallel to flow direction S and axially extends from base 416.Diverter element 420 comprises multiple correction fin 422 risen with 30 ° of angle A with reference to flow direction.Mixing fin 426 extends with 45° angle B relative to flow direction S.Slit 428 extends into mixing fin 426 with part bifurcated fin.
Second hybrid element 404 comprises and first flange 430 at the second flange 432 interval.First flange 430 and the second flange 432 are interconnected by base 434.Base 434 is roughly parallel to base 416 and extends and depart from base 416.First flange 430 comprises the outer surface 438 orientated as and engage with the internal surface 440 of the first side wall 412.First flange 430 is by such as welding, riveting or the technique of some other mechanical fastening technique is fixed on the first side wall 412.In a similar manner, the second flange 432 comprises the outer surface 442 orientated as and engage with the internal surface 444 of the second sidewall 414.
Second flange 432 is fixed on the second sidewall 414.Second hybrid element 404 also comprises the one or more correction fin 450 extended with 40 ° of angle C relative to flow direction S.Mixing fin 452 extends along in contrast to the direction correcting fin 450 with 40 ° of angle D.In the mode of execution that Figure 15 to 20 describes, single correction fin 450 is depicted as the upstream being in two laterally spaced mixing fins 452.The mixing fin 454 of part bifurcated is in addition parallel to fin 426 and extends.Outer mixing fin 456 and 458 extends with 45° angle E with reference to flow direction S.It should be noted that angle E does not need to equal angle B, and make mixing fin 454 be many times useful to extend in relative to the nonparallel mode of fin 426.These angles can carry out changing with the mixer 400 in " debugging " particular system thus realize the uniform divided flows of reducing agent best.
3rd hybrid element 406 is roughly similar to the second hybrid element 404.3rd hybrid element 406 comprises the first and second flanges 464,468.First flange 464 and the second flange 468 are interconnected by base 470.Base 470 is positioned as being roughly parallel to flow direction S and base 434.First flange 464 and the second flange 468 are by moulding and be placed as and fix with the internal surface 440,444 of the first hybrid element 402.In the mode similar to the second hybrid element 404, the 3rd hybrid element 406 comprises and corrects fin 474, a pair laterally spaced mixing fin 476, the mixing fin 478 of bifurcated and external mixing fin 480,482.The fin of this hybrid element 406 is roughly parallel to the similar fin of the second hybrid element 404.It should be noted that this relation only for citing, other angles also can be defined.
4th hybrid element 408 is roughly similar with the 3rd hybrid element 406 to the second hybrid element 404.4th hybrid element 408 comprises the first and second flanges 486,488.First flange 486 and the second flange 488 are interconnected by base 490.Base 490 is positioned as being roughly parallel to flow direction S and base 470.First flange 486 and the second flange 488 are by moulding and be placed as and fix with the internal surface 440,444 of the first hybrid element 402.The mode similar to the second hybrid element 404, the 4th hybrid element 408 comprises and corrects fin 494, a pair laterally spaced mixing fin 496, the mixing fin 498 of bifurcated and external mixing fin 500,502.
5th hybrid element 610 comprises the 9th and the tenth flange 684,686, and they are placed on slot 688,690, and is fixed on the 7th and the 8th antelabium 692,694.
Once the second hybrid element 404, the 3rd hybrid element 406, the 4th hybrid element 408 by each be fixed in the first hybrid element 402, electric hybrid module 400 can be placed in exhaust duct, such as before describe outlet pipe 40.It should be noted that the first side wall 412 and the second sidewall 414 size and shape are designed to contact or near the internal surface of outlet pipe 40.Mixer 400 is inserted outlet pipe 40 by with required axial position and angle orientation, then by any amount comprise welding, mechanical fasteners, clamping or similar technique and outlet pipe 40 is fixed.
Figure 21 depicts the alternative mixer identified with label 400a.Except the first side wall 412a comprises the general planar part 413 be placed between curved portion 415 and 417, mixer 400a is roughly similar to the mixer 400 described before.General planar part 413 is spaced apart with the internal surface of outlet pipe 40, and part 415 is consistent with internal surface with 417 and the technique such as pass through such as to weld and be fixed on internal surface.In an identical manner, the second sidewall 414a comprises the general planar core 419 be placed between curved section 421 and another curved section 423.General planar core 419 is spaced apart with the internal surface of outlet pipe 40.
Figure 22 depicts to 24 another the alternative mixer identified with label 600.Mixer 600 comprises multiple laterally spaced hybrid element 602,604,606,608 and 610.Mixer 600 comprises the housing 612 of each hybrid element of reception 602 to 610.Housing 612 can be independently element and be placed in outlet pipe inside, or alternative, and element 612 can represent outlet pipe itself.
Housing 612 comprises opening end 614, and multipair slot axially extends from described opening end.First pair of slot 616,618 ends at stop surface 617,619 in parallel to each other after opening end 614 axially extends predetermined distance.Slot 616,618 can be formed as a part for punching operation, make otch extend through housing 612 and instrument forms inwardly outstanding lips, such as the first lips 620 and the second lips 622 in described operation.First lips 620 is roughly parallel to the second lips 622 and extends.
First hybrid element 602 comprises the first periphery or flange 624 and the second spaced apart and almost parallel periphery or flange 626.Base 628 makes the first and second flanges 624, and 626 are interconnected.First flange 624 extends into the slot 618 near the first lips 620.In a similar manner, the second flange 626 extends into slot 616 and is placed as near the second lips 622.First and second flanges 624,626 are fixed on the first and second lips 620,622 by welding or soldering.Flange 624, the below of the cylinderical surface 632 that the distal tip of 626 limits to the major part by housing 612.By this way, mixer 600 can be inserted easily the exhaust duct with circular cross section.Base 628 is depicted as general planar and comprises a pair axially extended rib 636,638.Rib 636,638 arrange flex point, and the first hybrid element 602 bends the increase of the component size adapted to according to thermal expansion coefficient around described flex point.It should be noted that any amount of geometric properties can be included to obtain needed for flowing and mixed characteristic.Such as, it is contemplated that 602,604,606,608, the arbitrary hybrid element in 610 can comprise the one or more bending or protrusion tab similar in appearance to correcting fin 450 and/or mixing fin 476,478 or 480.
Second hybrid element 604 is roughly similar in appearance to first hybrid element 602 with axially extended third and fourth flange 642,644.Second pair of slot 646,648 extends through housing 612 and receives the third and fourth flange 642,644 respectively.Second hybrid element 604 is fixed on the third and fourth lips 647,649 of housing 612.
A pair relative breach 650,652 is formed in housing 612.Slot 654,656 at breach 650, extends through housing 612 in 652.Such as lips 620,622, the lips that extends internally not formed from the housing 612 near slot 654,656.On the contrary, slot 654 is placed on and is spaced and the end face 657 of housing 612 facing with each other, between 659.3rd hybrid element 606 comprises roughly radial extension and extends into slot 654, the 5th and the 6th flange 660 and 662 of 656.
3rd hybrid element 606 comprises the base portion 664 of periphery or flange 660,662 skew extended from radial direction.Base portion 664 is interconnected by inclined wall 668,670 and the radial flange 660,662 extended, and is heated repeatedly with cooling events to guarantee that mixer 600 can bear and can not be subject to structural impact due to the thermal expansion coefficient of hybrid element.Each hybrid element comprises bending or some geometrical shapies of locating towards the outer radial of the base portion of central flat, to provide bending flex point.During heating, when the base portion width of center general planar increases, each hybrid element can bend when needed to release the pressure and minimize the power be applied on housing 612.It is contemplated that equally, one or more hybrid elements can comprise center base part and coplanar periphery.Housing considers the elastic element of thermal expansion by comprising, a part of such as breach 650.In this construction, hybrid element does not arrange flex point.
Get back to the mode of execution of Figure 22 to 24, it should be noted that periphery or flange 660,662 be not upwarp but be roughly parallel to base portion 664 and extend.Like this, a surface of flange 660 is placed near end face 657, and the opposed surface of flange 660 is placed near end face 659.Identical layout is present in flange 662 and end face border slot 656.
Except the 7th and the 8th flange 674,676 at the interval of the 4th hybrid element 608 stretches out along the direction that the third and fourth flange 642,644 is contrary, the 4th hybrid element 608 is roughly similar in appearance to the second hybrid element 604.Arrange for holding this, the 5th and the 6th lips 678,680 is towards the third and fourth lips 647, and 649 extend internally.
Each hybrid element can use the punching press of sheet metal or shaping operation to be formed.The size and dimension of hybrid element can standardization or be individually suitable for specific application.In addition, although it should be noted that accompanying drawing depicts the mixer with five hybrid elements, other mixer also can be envisioned for has less or more hybrid element than shown.Such as, Figure 23 and 24 depicts mixer 600a.Mixer 600a is roughly similar to mixer 600.Therefore, similar element can by by the similar designated with subscript suffix " a ".Mixer 600a comprises the first hybrid element 604a, the second hybrid element 606a and the 3rd hybrid element 608a.Housing 612a only includes the slot of necessary amount to receive these hybrid elements.
Figure 25 to 27 depicts alternative mixer 700, and described mixer comprises the first to the 6th hybrid element, is respectively 702,704,706,708,710 and 712.Main body except each hybrid element is shaped as the flat board of the general planar with the fin extended relative to its angle, and the hybrid element of mixer 700 is roughly similar with the hybrid element 606 of mixer 600 to the hybrid element of mixer 400.What each hybrid element 702-710 comprised mark and have " a " suffix upwarps mixing fin.Hybrid element 712 comprises the outward extending diverter element 716 had towards mixing fin 702a-710a rightabout correction fin 712a.Hybrid element 704 to 712 also comprises and is multiplely positioned at each hybrid element core and mark has the afterbody mixing fin of " b " suffix.Element 704 to 710 also comprises mark the laterally spaced external mixing fin of the afterbody of subscript " c " suffix.It should be noted that often kind of mixing quantity of fin and their angles of extending from the base portion of general planar can custom-mades, to shunt the reagent of injection in specific exhaust-gas treatment system best.
Each hybrid element comprises the tongue piece part of the width with reduction, and described tongue piece part has the hybrid element reference character comprising " d " suffix, described tongue piece part with there is whole width and the coplanar extension of main body identified with " e " suffix.The width of tongue piece is reduced the substantial cylindrical surface, inside 718 with clear and definite ring 720.
Ring 720 comprises multiple groove 724 extended radially inwardly.Each groove comprises the slot 726 extending through it.Groove and slot are arranged in pairs and are identified with suffix letter " a " to " l ".Slot is also by the corresponding suffix of station location marker according to pairing.First the tongue piece part with the width of the reduction of " d " suffix is inserted into ring 720.The peripheral part with the wider main body of " e " suffix extends through corresponding slot pair.Such as, the peripheral part horizontal expansion of main body 702e enters slot 726a and 726b.As above about the description of the 3rd hybrid element 606, the axial position of each hybrid element 702 to 712 by the length of corresponding slot and the tongue piece part and mark with " d " suffix have the body of " e " suffix divide between the axial position of transition limit.
What be positioned over the side of each slot 726 is elastic element 730, and another elastic element 732 is positioned over the opposite side of slot 726.In order to clear, 730b and 732b that only have elastic component is identified in Figure 26 and 27.Elastic element 730,732 when incident heat radially outward deflection, in described incident heat hybrid element 702 temperature rise and its width correspondingly increase due to thermal linear expansion coefficient.When temperature variation causes the hybrid element dimensional changes of being correlated with, remaining elastic element serves identical effect.
Figure 28 depicts alternative mixer 800.Mixer 800 comprises the mixer 802 of the mixer roughly described before similar in appearance to, and the mixer before described comprises mixer 1, mixer 400, mixer 600 or mixer 700.Mixer 802 is combined the reagent improved in outlet pipe 40 and shunts by mixer 800 with secondary mixer 804.
Mixer 802 comprises uppermost mixing fin 806 backward, this roughly similar in appearance to Figure 18 describe mixing fin 500 or Figure 39 a shown in mixing fin 31.The composite character of mixer 802 is combined to solve injection by mixer 800 reagent with secondary mixer 804 on the upper surface 810 of outlet pipe 40 or near the problem of flowing.Upper surface 810 is restricted to the part of the internal surface of the outlet pipe 40 extended to downstream in the approximate angle position of injection device 5.Secondary mixer 804 provides the flowing correction of exhaust stream to improve the reagent shunting in downstream.
Secondary mixer 804 is depicted as from the radially-inwardly outstanding roughly spherical projection 814 of upper surface 810.Projection 814 comprises the point 816 of the inside position of maximum radial of about 10% of the diameter of retraction outlet pipe 40.Secondary mixer 804 is placed on the outgoing event with mixer 802.Particularly, the structure lines 820 extended to downstream from mixing fin 806 is depicted.Structure lines 820 is crossing with the position that secondary mixer 804 continues to extend radially inwardly in projection 814.In other words, structure lines 820 is crossing at the upstream position of point 816 with projection 814.In the object lesson described in the drawings, structure lines 820 and projection 814 intersect at a point, this some place projection 814 25% in intersection point upstream the downstream of 75% of projection 814 intersection point between structure lines 820 and projection 814.
Advantageously, secondary mixer 804 utilizes it minimumly provide little to inner process or do not provide rear pressure to affect.When the reagent uniformity of the layout only using mixer 802 shows the raising of 7-12%, exhaust velocity distribution keeps roughly consistent.The computation fluid dynamics modeling of the gradient of indicator concentration and Species distributing is diffused with the combination of secondary mixer 804 by using mixer 802.It is contemplated that projection 814 can axially locating make structure lines 820 and secondary mixer 804 intersect at position in the scope of 10% to 50% of the axial length of projection.By this way, radially-inwardly deflect along the exhaust of upper surface 810 movement and reagent, and guided by towards radially outer direction through the exhaust of mixing fin 806 and reagent.
The illustrative embodiments of the content of the present invention that foregoing description only disclose and describes.Obviously, those skilled in the art can carry out various change, change and modification according to foregoing description, accompanying drawing and claim to the present invention and not depart from the spirit and scope of the present invention of following claim restriction.

Claims (54)

1. the mixer for the fluid injecting outlet pipe is mixed with exhaust stream, described mixer comprises:
First hybrid element, described first hybrid element comprises the interconnective base of the second sidewall by the first side wall and interval, first and second sidewalls comprise the free distal end be spaced separately, the size and dimension of the part of the first and second sidewalls is designed to the internal surface adapting to outlet pipe, sidewall is made to be suitable for being fixed on outlet pipe, first hybrid element comprises the diverter element orientating the fluid impact injected as and the mixing fin being positioned diverter element downstream, to be mixed with exhaust by the fluid injected; And
Second hybrid element, described second hybrid element comprises the interconnective base of the first and second mounting flanges that will separate, first and second mounting flanges are fixed in the internal surface of the first and second sidewalls, and the second hybrid element comprises mixing fin, to change exhaust stream direction.
2. mixer according to claim 1, comprise the 3rd hybrid element further, described 3rd hybrid element comprises the interconnective base of the third and fourth mounting flange that will separate, third and fourth mounting flange is fixed in the internal surface of the first and second sidewalls, 3rd hybrid element comprises mixing fin, to change exhaust stream direction.
3. mixer according to claim 2, the base of wherein said second hybrid element is roughly parallel to the base extension of described 3rd hybrid element.
4. mixer according to claim 3, wherein second and the 3rd the mixing fin of hybrid element extend roughly in parallel to each other.
5. mixer according to claim 1, wherein the base of the first and second hybrid elements extends roughly in parallel to each other.
6. mixer according to claim 1, wherein when measuring from the center of described outlet pipe, the circumferentially spaced angle being less than 90 ° of the far-end of the first and second sidewalls.
7. mixer according to claim 1, wherein the first and second sidewalls extend axial length, and described diverter element is by being positioned to stretch out the first and second sidewalls outside axial length.
8. mixer according to claim 7, is wherein located in mixing fin outside described axial length as diverter element at the opposite side of the first and second sidewalls.
9. mixer according to claim 1, wherein said diverter element comprises the part of the general planar being roughly parallel to described exhaust stream direction, and relative to the correction fin that described exhaust stream direction extends at a certain angle.
10. mixer according to claim 1, wherein the described part of the first and second sidewalls comprises circular shape.
11. mixers according to claim 1, wherein mix fin and extend to the angular range of 45 degree at roughly 40 degree relative to the exhaust stream direction of described mixer upstream.
12. mixers according to claim 11, wherein said diverter element extends with the angle of roughly 30 degree relative to the exhaust stream direction of described mixer upstream.
13. mixers according to claim 1, the gap between the far-end of wherein the first and second sidewalls is aimed at common angular orientation with the fluid of described injection.
14. mixers according to claim 1, wherein said the first side wall comprises by interconnective first curved section of the part of general planar and the second curved section, and smooth part is suitable for the internal surface of described outlet pipe spaced apart.
15. mixers according to claim 14, wherein said second sidewall comprises by interconnective first curved section of the part of general planar and the second curved section, and the smooth part of described second sidewall is roughly parallel to the smooth part extension of described the first side wall.
16. 1 kinds of mixers for the fluid injecting outlet pipe is mixed with exhaust stream, this mixer comprises:
Housing, described housing comprises second sidewall at the first side wall and interval, and the first and second sidewalls respectively comprise spaced free distal end, and wherein the part of the first and second sidewalls is suitable for being fixed to outlet pipe;
First hybrid element, the diverter element that described first hybrid element comprises the general planar orientating the fluid impact injected as and the multiple correction fins given prominence at a certain angle from diverter element; And
Second hybrid element, the first and second sidewalls are interconnected and extend substantially in parallel with the first hybrid element by described second hybrid element, and described second hybrid element comprises mixing fin, to change exhaust stream direction.
17. described mixers according to claim 16, wherein said first and second sidewalls extend axial length, and described diverter element is by being positioned to stretch out described first and second sidewalls outside axial length.
18. described mixers according to claim 17, wherein said diverter element extends the upstream of described first and second sidewalls with being roughly parallel to exhaust stream direction.
19. described mixers according to claim 18, the gap between the far-end of wherein said first and second sidewalls is aimed at common angular orientation with the fluid of described injection.
20. mixers according to claim 16, wherein said the first side wall comprises the part of the general planar extended perpendicular to described diverter element, and between the part being positioned as being suitable for the first side wall being fixed to described outlet pipe.
21. mixers according to claim 16, wherein said correction fin comprises the flip portion of the common single plate forming described diverter element and described first hybrid element, and described correction fin comprises free edge and attachment portion.
22. mixers according to claim 16, wherein said first hybrid element comprises the mixing fin of upset at its trailing edge.
23. 1 kinds of mixers for the fluid injecting outlet pipe is mixed with exhaust stream, this mixer comprises:
Tubular shell, it comprises from axially extended, the circumferentially spaced slot of the opening end of housing;
First hybrid element, described first hybrid element comprises the interconnective core of the second periphery by the first periphery and interval, first periphery is located in in slot, second periphery is located in another in slot, and periphery is fixed in housing; And
Second hybrid element, described second hybrid element comprises the interconnective core of the 4th periphery by the 3rd periphery and interval, third and fourth periphery to be located in other slot and to be fixed on housing, the second hybrid element and the first hybrid element spaced apart.
24. mixers according to claim 23, wherein the first and second hybrid elements core general planar and extend roughly in parallel to each other.
25. mixers according to claim 23, wherein in the first and second peripheries each along except comprise described first hybrid element core plane except plane extend, described first hybrid element is bent when heating, to reduce the stress putting on housing.
26. mixers according to claim 23, wherein the core of the first and second peripheries and described first hybrid element is positioned at common plane.
27. mixers according to claim 26, wherein said housing comprises elastic part, described elastic part located and design size in response to heating time described in the first hybrid element size increase and deflect.
28. mixers according to claim 23, wherein said first hybrid element does not protrude past the drum of the outer surface of described housing.
29. mixers according to claim 23, wherein said housing comprises the first and second inwardly outstanding lips, first lips extends along the side of one of described slot and is fixed in described first periphery, and the second lips extends along the side of slot described in another and is fixed in described second periphery.
30. mixers according to claim 29, wherein the first and second peripheries are approximately perpendicular to the core extension of described first hybrid element.
31. mixers according to claim 29, wherein said first lips and described first overlapping peripheral portions.
32. mixers according to claim 23, wherein the first and second peripheries extend along the opposite direction of the third and fourth periphery.
33. mixers according to claim 23, wherein said housing comprises circumferentially spaced groove, and described slot is located in groove.
34. mixers according to claim 32, wherein said housing is included in the first and second opposing end surfaces on the opposite side of one of described slot, and described first periphery is positioned between the first and second opposing end surfaces.
35. mixers according to claim 23, wherein the first and second hybrid elements respectively comprise sheet metal.
36. mixers according to claim 23, wherein said housing is suitable for being positioned at least in part the inside of outlet pipe and is fixed in outlet pipe.
37. mixers according to claim 23, wherein said first hybrid element comprises the rib being roughly parallel to described exhaust stream direction and extending.
38. mixers according to claim 23, the slot wherein receiving the first mixed plate stops in stop surface, and the position of the first and second peripheries is stopped face restriction.
39. 1 kinds of mixers for the fluid injecting outlet pipe is mixed with exhaust stream, this mixer comprises:
Main mixer, described main mixer comprises the first hybrid element, and described first hybrid element has mixing fin to be mixed with exhaust by the fluid injected; And
Secondary mixer, described time mixer is located in main mixer downstream, described mixer comprises the exhaust stream be integrally formed with outlet pipe and is redirected element, and comprise the surface that extends internally with maximum inside protruding point, described mixer is positioned as making the structure lines from the extension of mixing fin crossing in maximum inside protruding point upstream with the surface that extends internally.
40. according to mixer according to claim 39, wherein said main mixer comprises the second hybrid element, described second hybrid element comprises mixing fin to change exhaust stream direction, wherein said first hybrid element and described second hybrid element radially spaced apart, and to be positioned as than described second hybrid element closer to fluid injection point.
41. mixers according to claim 40, wherein said first hybrid element is roughly parallel to described second hybrid element and extends.
42. mixers according to claim 41, the mixing fin of wherein said first hybrid element is along roughly radially outer direction deflection exhaust stream.
43., according to mixer according to claim 39, comprise diverter element further, position that described diverter element is positioned described mixing fin upstream, that can be subject to injecting fluid impact.
44. mixers according to claim 43, wherein said diverter element comprises the part being roughly parallel to the general planar that described exhaust stream direction extends, and relative to the correction fin that described exhaust stream direction extends at a certain angle.
45. mixers according to claim 44, wherein said diverter element extends with the angle of roughly 30 degree relative to the exhaust stream direction of described mixer upstream.
46. according to mixer according to claim 39, and wherein said mixing fin extends at roughly 40 degree relative to the exhaust stream direction of described mixer upstream to the angular range of 45 degree.
47. according to mixer according to claim 39, wherein extends radially inwardly the ball recess that surface is described outlet pipe.
48. according to mixer according to claim 39, and the axial position of the roughly half distance of wherein said structure lines between described maximum inside protruding point and the leading edge of ball recess is crossing with the described surface that extends internally.
49. according to mixer according to claim 39, and wherein said maximum inside protruding point extends radially inwardly the distance of roughly air slit diameter 10%.
50. 1 kinds of mixers for the fluid injecting outlet pipe is mixed with exhaust stream, this mixer comprises:
Tubular shell, described tubular shell comprises from axially extended, the circumferentially spaced slot of the opening end of housing;
First hybrid element, described first hybrid element comprises the main body of the general planar with the first periphery and the second periphery, first periphery is located in in slot, and the second periphery is located in another in slot, and periphery is fixed in housing; And
Second hybrid element, described second hybrid element comprises the main body of the general planar with the third and fourth periphery, and the third and fourth periphery to be located in other slot and to be fixed on housing, the second hybrid element and the first hybrid element spaced apart.
51. mixers according to claim 50, wherein said tubular shell comprises elastic member that be coupled in described first hybrid element, that extend internally, and described elastic member moves when temperature raises the size of described first hybrid element is increased.
52. mixers according to claim 50, wherein said first hybrid element comprises the tongue piece part being positioned width in housing, that have reduction.
53. 1 kinds of mixers for the fluid injecting outlet pipe is mixed with exhaust stream, this mixer comprises:
Tubular shell, described tubular shell comprises the upstream extremity of opening and the downstream of opening, and the size of housing is designed to be suitable and is assembled in outlet pipe and is fixed on outlet pipe.
First hybrid element, described first hybrid element comprises smooth part, described smooth part comprises the first edge and the second relative edge, first and second edges are fixed in housing, first hybrid element comprises the mixing fin extended at a certain angle from smooth part, wherein adjacent mixing fin extends along opposite directions, and mixing fin extends beyond the downstream of housing; And
Second hybrid element, described second hybrid element comprises smooth part, described smooth part comprises interval and the third and fourth relative edge, third and fourth edge is fixed in housing, second hybrid element and the first hybrid element interval and extend abreast, second hybrid element comprises the mixing fin extended at a certain angle from smooth part, and wherein adjacent fin extends in opposite directions, and the mixing fin of the second hybrid element extends beyond the downstream of housing.
54. mixers according to claim 53, wherein said fluid injects along injection axle, and described mixer is positioned as making fluid injection axle crossing with of described first and second hybrid elements.
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KR101956731B1 (en) 2019-03-12

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