CN108757128A

CN108757128A - Mixing chamber component

Info

Publication number: CN108757128A
Application number: CN201810685040.2A
Authority: CN
Inventors: 殷雷; 彭宇; 慕玉龙
Original assignee: Tenneco Suzhou Emission System Co Ltd
Current assignee: Tenneco Suzhou Emission System Co Ltd
Priority date: 2018-06-28
Filing date: 2018-06-28
Publication date: 2018-11-06

Abstract

A kind of mixing chamber component comprising cavity and to install the mounting hole of urea nozzle.The cavity includes the first sub- cavity to be connected to the first after-treatment components, the sub- cavity of the second sub- cavity and centre to be connected to the second after-treatment components.The urea nozzle into the described first sub- cavity spraying urea droplets.The mixing chamber component further includes the mixer being located in the sub- cavity in the centre, and the mixer is tilted equipped with framework and several fins being obliquely installed, the fin along the clockwise successively.The mixer is additionally provided with to tilt and extend into the described first sub- cavity and to assemble the first flow deflector of urea spray and at least partly tilt the second flow deflector extended into the sub- cavity in the centre.So set, improving the mixing of urea droplets and exhaust, urea droplets evaporation rate is improved, reduces the risk of urea crystals.

Description

Mixing chamber component

Technical field

The present invention relates to a kind of mixing chamber components, belong to engine exhaust post-processing technology field.

Background technology

Research shows that ammonia distribution in exhaust after treatment system (such as selective catalytic reduction system operating, SCR system) pipeline Uniformity coefficient has important influence to the overall performance and endurance quality of system.If ammonia (NH₃) be unevenly distributed and can cause Oxynitrides (NOx) transformation efficiency is too low, and easily causing ammonia if increasing urea injecting quantity to meet emission performance lets out Leakage pollution.Urea droplets are easy deposition when touching the lower wall surface of temperature simultaneously, formed crystallization it is serious when can block exhaust It manages, engine power performance is caused to decline.The mixing uniformity for improving ammonia molecule can effectively improve urea desorption column, reduce Urea injecting quantity is to reduce the risk of urea crystals.

Therefore, it is necessary to provide a kind of mixing chamber component that can improve ammonia molecular mixing uniformity to solve above-mentioned skill Art problem.

Invention content

The purpose of the present invention is to provide a kind of mixing chambers that the exhaust of engine can be made to be uniformly mixed with urea droplets Component.

To achieve the above object, the present invention adopts the following technical scheme that：A kind of mixing chamber component, for after engine exhaust In processing unit, the mixing chamber component includes cavity and to install the mounting hole of urea nozzle, and the cavity includes using Be connected to the first after-treatment components the first sub- cavity, to the second sub- cavity being connected to the second after-treatment components and company The sub- cavity in centre of the logical first sub- cavity and the second sub- cavity, the first sub- cavity is compared to the described second sub- chamber Body is located at the upstream of flow direction of exhaust gases, and the urea nozzle is described to spray urea droplets into the described first sub- cavity Mixing chamber component further includes the mixer being located in the centre sub- cavity, and the mixer is equipped with framework and is obliquely installed Several fins, wherein including substantially the first hollow-out parts, the second hollow-out parts, third hollow out successively along clockwise in the framework Portion, the 4th hollow-out parts, the 5th hollow-out parts and the 6th hollow-out parts, the mixer are additionally provided in first hollow-out parts First fin, the third fin in the third hollow-out parts, is located at institute at the second fin in second hollow-out parts It states the 4th fin in the 4th hollow-out parts, the 5th fin in the 5th hollow-out parts and is located at the 6th hollow-out parts The 6th interior fin, wherein first fin, the second fin, third fin, the 4th fin, the 5th fin and the 6th fin It is tilted successively along the clockwise；The mixer is additionally provided with inclination and extends into the described first sub- cavity and to assemble urine First flow deflector of plain spray and at least partly inclination extend into the second flow deflector in the sub- cavity in the centre.

As further improved technical scheme of the present invention, first flow deflector is with corresponding third fin and accordingly The 6th fin integrally connected.

As further improved technical scheme of the present invention, the mixing chamber component include main part and with the main body The matched cover board in portion, the main part include side plate and the side wall that extends from the side plate, and the cover board is fixed on described On side wall, the first sub- cavity, the second sub- cavity and intermediate sub- cavity are formed by the main part and the cover board；Institute State cover board include be connected to the described first sub- cavity and the first opening corresponding to first after-treatment components and with it is described Second sub- cavity connection and the second opening for corresponding to second after-treatment components, the mounting hole are located at the top of the side wall End.

As further improved technical scheme of the present invention, the mixer is additionally provided with from the lateral margin of first flow deflector The fixinig plate of extension, the fixinig plate are welded on the inside of the side plate.

As further improved technical scheme of the present invention, first hollow-out parts, the 6th hollow-out parts and the 5th hollow out Portion lines up the first row, and second hollow-out parts, third hollow-out parts and the 4th hollow-out parts line up parallel with the first row Two rows；

First hollow-out parts are arranged in first row with second hollow-out parts, and the 6th hollow-out parts are engraved with the third Empty portion is arranged in secondary series, and the 5th hollow-out parts are arranged in third row with the 4th hollow-out parts, wherein the secondary series position Between described first is listed in the third row.

As further improved technical scheme of the present invention, the framework is trapezoidal comprising the first side of interconnection Side, second side, third side and four side, wherein the first side is short side, the third side is long side.

As further improved technical scheme of the present invention, the mixer include be erected at the second side with it is described The first partition wall on four side, first hollow-out parts, the 6th hollow-out parts and the 5th hollow-out parts are located at described first point The side in next door, second hollow-out parts, third hollow-out parts and the 4th hollow-out parts are located at the other side of first partition wall； What second flow deflector extended out from the four side and first partition wall respectively.

As further improved technical scheme of the present invention, the mixer includes being erected at the first side, first Several second partition walls on partition wall and third side, second partition wall are equipped with third plate, the third fin Extend from one end of the third plate, the 6th fin extends from the other end of the third plate, the third fin It is opposite with the inclined direction of the 6th fin.

As further improved technical scheme of the present invention, the mixer includes being erected at the second side and most Several first plates on that second partition wall of the second side, first fin prolong from first plate It stretches；The mixer includes being erected at the second side and on that second partition wall of the second side Several second plates, second fin extend from second plate；The mixer includes being erected at the four side And several 4th plates on that second partition wall of the four side, the 4th fin is from the described 4th Plate extends；The mixer includes being erected at the four side and that second separation near the four side Several 5th plates on wall, the 5th fin extend from the 5th plate；First flow deflector is intermediate from being located at That second partition wall extend out.

As further improved technical scheme of the present invention, the clockwise is square clockwise or counter-clockwise To.

Compared to the prior art, the present invention is by being arranged the first flow deflector and the second flow deflector, wherein first water conservancy diversion Piece improves to assemble urea spray because of the undesirable influence brought of arrangement of nozzles angle caused by the reason of boundary；It is described Second flow deflector increases air-flow to the flow distance of carrier, enhances mixed performance.

Description of the drawings

It is vertical that Fig. 1 is mixing chamber component of the present invention and the first after-treatment components and the second after-treatment components fit together Body schematic diagram.

Fig. 2 is the part isometric exploded view of Fig. 1, and wherein mixing chamber component is separated.

Fig. 3 is the part isometric exploded view of mixing chamber component in Fig. 2, wherein cover board and baffle are separated.

Fig. 4 is the further stereogram exploded views of Fig. 3, and wherein mixer is also separated.

Fig. 5 is the stereoscopic schematic diagram of another angle of mixing chamber component in Fig. 2.

Fig. 6 is the front view of mixing chamber component in Fig. 2.

Fig. 7 is the side view of Fig. 6.

Fig. 8 is the stereoscopic schematic diagram after mixing chamber component removal cover board and baffle in Fig. 2.

Fig. 9 is the front view of Fig. 8.

Figure 10 is the stereogram of another angles of Fig. 8.

Figure 11 is the stereogram of mixer in Fig. 8.

Figure 12 is the part isometric exploded view of Figure 11.

Figure 13 is the stereogram of another angles of Figure 11.

Figure 14 is the stereogram exploded view of mixer in Fig. 8.

Figure 15 is the further stereogram exploded views of Figure 14.

Specific implementation mode

It please join shown in Fig. 1 to Figure 15, present invention is disclosed a kind of mixing chamber components 100, are post-processed for engine exhaust To handle the exhaust of engine in device.The exhaust gas post-treatment device may include being located at 100 upstream of mixing chamber component The first after-treatment components 200 and/or the second after-treatment components 300 positioned at 100 downstream of mixing chamber component.Wherein, One after-treatment components 200 can be the combination of oxidation catalyzer (DOC) or DOC and diesel particulate trap (DPF), after second Processing component 300 can be selective catalytic reduction module (SCR).Certainly, in some embodiments, it can also use and apply The DPF (SDPF) of SCR catalyst replaces DPF.The shape of exhaust gas post-treatment device can be linear, U-shaped, Z-shaped, L-shaped etc.. In addition, person of ordinary skill in the field is appreciated that above-mentioned DOC, DPF, SDPF etc. can be designed as according to actual needs Other kinds of catalyst converter or combination, details are not described herein.

It please join shown in Fig. 2 to Figure 15, the mixing chamber component 100 is including cavity 101 and in the cavity 101 Mixer 40.According to different subregions, the cavity 101 includes described in the first sub- cavity 10, the second sub- cavity 20 and connection The sub- cavity in the centre of first sub- cavity 10 and the described second sub- cavity 20 30, wherein the first sub- cavity 10 is compared to described Second sub- cavity 20 is located at the upstream of flow direction of exhaust gases, and the mixer 40 is located in the sub- cavity in the centre 30.

Structurally, please join shown in Fig. 3 and Fig. 7, mixing chamber component 100 of the invention include main part 1 and with institute State 1 matched cover board 2 of main part.The main part 1 includes side plate 11 and the side wall 12 from the extension of the side plate 11.It is described Cover board 2 is fixed on for example, by the mode of welding on the side wall 12.In illustrative embodiments of the present invention, first son Cavity 10, the second sub- cavity 20 and intermediate sub- cavity 30 are formed by the main part 1 and the cover board 2.

Specifically, please join shown in Fig. 9, in illustrative embodiments of the present invention, the side wall 12 is at the top of it Position is equipped with to install the mounting hole 1213 of urea nozzle.The mounting hole 1213 is located at a left side for the mixing chamber component 100 Top, i.e., it is angled with 100 median plane of mixing chamber component.

It please join shown in Fig. 7, the first sub- cavity 10 is offset from each other with the described second sub- cavity 20.Perpendicular to exhaust stream On the thickness direction A-A in dynamic direction, the mixing chamber component 100, which is equipped with, is located at the described first sub- cavity 10 and the described second sub- chamber Rake 50 between body 20, to form the necking 51 corresponding to the mixer 40.

It please join shown in Fig. 2 to Fig. 4, the cover board 2 includes the first plate portion 21, the second plate portion 22 and connection described the The face 23 that inclines in one plate portion 21 and second plate portion 22.The face 23 that inclines corresponds to the rake 50.In addition, institute It states the first plate portion 21 and is equipped with the first opening that the first after-treatment components 200 are connected to and corresponded to the described first sub- cavity 10 211, second plate portion 22, which is equipped with, to be connected to the described second sub- cavity 20 and corresponding to the second of the second after-treatment components 300 Opening 221.In illustrative embodiments of the present invention, first opening 211 is upstream exhaust entrance, second opening 221 export for downstream exhaust gas.

The mixer 40 is equipped with to tilt and extend into the described first sub- cavity 10 and to assemble the first of urea spray Flow deflector 9 and at least partly tilt the second flow deflector 7041,814 extended into the sub- cavity in the centre 30.In the present invention In embodiment illustrated, first flow deflector, 9 and second flow deflector 7041,814 is located at the mixer 40 Top and lower part, wherein first flow deflector 9 improves to assemble urea spray because of nozzle cloth caused by the reason of boundary The undesirable influence brought of angle setting degree；Second flow deflector 7041,814 increases air-flow to the flow distance of carrier, and enhancing is mixed Close performance.

It please join shown in Fig. 8 to Figure 15, specifically, several fins that the mixer 40 is equipped with framework 7 and is obliquely installed 8, wherein including substantially the first hollow-out parts 71, the second hollow-out parts 72, third hollow-out parts successively along clockwise in the framework 7 73, the 4th hollow-out parts 74, the 5th hollow-out parts 75 and the 6th hollow-out parts 76.The fin 8, which is equipped with, is located at first hollow-out parts The first fin 81 in 71, the second fin 82 in second hollow-out parts 72, in the third hollow-out parts 73 Third fin 83, the 4th fin 84 in the 4th hollow-out parts 74, the 5th wing in the 5th hollow-out parts 75 Piece 85 and the 6th fin 86 in the 6th hollow-out parts 76, wherein first fin 81, the second fin 82, third Fin 83, the 4th fin 84, the 5th fin 85 and the 6th fin 86 tilt successively along the clockwise.It please join Figure 12 institutes Show, in illustrative embodiments of the present invention, the clockwise is counter clockwise direction shown in oval upward arrow, is existed certainly In other embodiment or clockwise.First flow deflector 9 is with corresponding third fin 83 and accordingly 6th fin, 86 integrally connected.

The mixer 40 is additionally provided with the fixinig plate 91 from the extension of the lateral margin of first flow deflector 9, the fixinig plate 91 It is welded on the inside of the side plate 11.

By the way that this structural mixer 40 is arranged, urea droplets are with exhaust under the flow-disturbing of corresponding hollow-out parts and fin It is mixed, improves the uniformity of mixing, reduce the risk of urea crystals.Above-mentioned hollow-out parts are urea droplets and exhaust Mixture is probably divided into different regions, to improve the uniformity of distribution.In addition, being tilted in the same direction by setting Fin, can make mixture formed eddy flow, to improve the uniformity of mixing.Shown in Fig. 9 and Figure 10, mixture exists Under the action of third fin 83 and the 6th fin 86, substantially form inside and outside the described second sub- cavity 20 such as Fig. 9 and Double-cyclone shown in arrow in Figure 10, to improve mixed effect.

In illustrative embodiments of the present invention, first hollow-out parts 71, the 6th hollow-out parts 76 and the 5th hollow-out parts 75 line up the first row, and second hollow-out parts 72, third hollow-out parts 73 and the 4th hollow-out parts 74 are lined up flat with the first row The second capable row.

First hollow-out parts 71 and second hollow-out parts 72 are arranged in first row, the 6th hollow-out parts 76 with it is described Third hollow-out parts 73 are arranged in secondary series, and the 5th hollow-out parts 75 are arranged in third row with the 4th hollow-out parts 74, wherein The secondary series is listed in positioned at described first between the third row.

In illustrative embodiments of the present invention, the framework 7 is substantially trapezoidal comprising the first side of interconnection 701, second side 702, third side 703 and four side 704, wherein the first side 701 is short side, the third Side 703 is long side.

The mixer 40 includes being erected at the second side 702 and the first partition wall on the four side 704 811, first hollow-out parts 71, the 6th hollow-out parts 76 and the 5th hollow-out parts 75 are located at the side of first partition wall 811, Second hollow-out parts 72, third hollow-out parts 73 and the 4th hollow-out parts 74 are located at the other side of first partition wall 811.Institute The first partition wall 811 is stated to be equipped with vertical flat part 8111 and extend in opposite directions from the both ends of the flat part 8111 7th fin 8112 and the 8th fin 8113.Wherein described 7th fin 8112 and the first fin 81 and the second fin 82 Inclined direction is identical, and the 8th fin 8113 is identical as the 4th fin 84 and the inclined direction of the 5th fin 85.

The mixer 40 includes being erected on the first side 701, the first partition wall 811 and third side 703 Several second partition walls 821, second partition wall 821 is equipped with third plate 8211, and the third fin 83 is from described the One end (such as front end in Figure 14) of three plates 8211 extends, and the 6th fin 86 is from the another of the third plate 8211 (such as rear end in Figure 14) is held to extend, the third fin 83 is opposite with the inclined direction of the 6th fin 86.

The mixer 40 includes being erected at the second side 702 and that near the second side 702 Several first plates 810 on second partition wall 821, first fin 81 extend from first plate 810.

The mixer 40 includes being erected at the second side 702 and that near the second side 702 Several second plates 820 on second partition wall 821, second fin 82 extend from second plate 820.

The mixer 40 includes being erected at the four side 704 and that near the four side 704 Several 4th plates 840 on second partition wall 821, the 4th fin 84 extend from the 4th plate 840.

The mixer 40 includes being erected at the four side 704 and that near the four side 704 Several 5th plates 850 on second partition wall 821, the 5th fin 85 extend from the 5th plate 850.

It please join shown in Figure 11 to Figure 15, first plate 810, the second plate 820, third plate 8211, the 4th plate 840 and the 5th plate 850 be in be laterally extended；The flat part 8111 is and interlaced with the transverse direction in being longitudinally extended. The top of the framework 7, third plate 8211 and flat part 8111 is respectively provided with groove, to position corresponding plate.

In illustrative embodiments of the present invention, second flow deflector 7041,814 is respectively from the four side 704 And first partition wall 811 extends out.First flow deflector 9 is from that second partition wall for being located at centre 821 extend out.

It please join shown in Fig. 2 to Fig. 6, the mixing chamber component 100 includes being located at first after-treatment components 200 and institute The baffle 6 between the first sub- cavity 10 is stated, the baffle 6 is equipped with several perforation 61.It can be reduced from first by the way that baffle 6 is arranged The deflection that the exhaust that after-treatment components 200 come out directly generates the urea ejected, raising urea droplets are mixed with exhaust It closes, improves urea droplets evaporation rate, improve ammonia distributing homogeneity, reduce the risk of urea crystals.

It will be appreciated, of course, that in other embodiments, the fin of mixer 40 can also be set to be divided into inside and outside two Layer.Preferably, the fin of the inclined direction and outer layer of the fin of internal layer inclined direction on the contrary, the fin of such as internal layer along up time Needle tilts, and the fin of outer layer along tilting counterclockwise, and vice versa.

It is used herein such as "upper", "lower", "left", "right", "front", "rear", representation space relative position term It is to describe relationship of the feature relative to another feature as shown in the drawings for the purpose convenient for explanation.It can manage Solution, according to the difference of product placement position, the term of relative space position can be intended to include other than orientation as shown in the figure Different direction, should not be interpreted as limitations on claims.In addition, descriptor "vertical" used herein and non-fully It is equal to the inclination for allowing have certain angle along gravity direction.

In addition, above example is merely to illustrate the present invention and not limits technical solution described in the invention, to this The understanding of specification should be based on person of ordinary skill in the field, although this specification is with reference to the above embodiments pair Present invention has been detailed description, still, it will be understood by those of ordinary skill in the art that, the technology of technical field Personnel still can modify or equivalently replace the present invention, and all do not depart from the technology of the spirit and scope of the present invention Scheme and its improvement should all be covered in scope of the presently claimed invention.

Claims

1. a kind of mixing chamber component, in exhaust post-treatment apparatus of engine, the mixing chamber component to include cavity and use To install the mounting hole of urea nozzle, the cavity include to be connected to the first after-treatment components the first sub- cavity, to The centre of the second sub- cavity and the connection first sub- cavity and the second sub- cavity that are connected to the second after-treatment components Sub- cavity, the first sub- cavity are located at the upstream of flow direction of exhaust gases, the urea nozzle compared to the described second sub- cavity To spray urea droplets into the described first sub- cavity, the mixing chamber component further includes being located in the sub- cavity in the centre Mixer, several fins that the mixer is equipped with framework and is obliquely installed, wherein substantially along clockwise in the framework Successively include the first hollow-out parts, the second hollow-out parts, third hollow-out parts, the 4th hollow-out parts, the 5th hollow-out parts and the 6th hollow-out parts, The mixer is additionally provided with the first fin in first hollow-out parts, the second wing in second hollow-out parts Piece, the 4th fin in the 4th hollow-out parts, is located at the described 5th at the third fin in the third hollow-out parts The 5th fin in hollow-out parts and the 6th fin in the 6th hollow-out parts, wherein first fin, the second wing Piece, third fin, the 4th fin, the 5th fin and the 6th fin tilt successively along the clockwise；It is characterized in that, institute It states mixer and is additionally provided with to tilt and extend into the described first sub- cavity and to assemble the first flow deflector and extremely of urea spray Small part tilts the second flow deflector extended into the sub- cavity in the centre.

2. mixing chamber component as described in claim 1, it is characterised in that：First flow deflector and corresponding third fin with And corresponding 6th fin integrally connected.

3. mixing chamber component as claimed in claim 2, it is characterised in that：The mixing chamber component include main part and with institute State the matched cover board of main part, the main part includes side plate and the side wall that extends from the side plate, and the cover board is fixed On the side wall, the first sub- cavity, the second sub- cavity and intermediate sub- cavity are by the main part and the cover board It is formed；The cover board include be connected to the described first sub- cavity and the first opening corresponding to first after-treatment components and It is connected to the described second sub- cavity and corresponding to the second opening of second after-treatment components, the mounting hole is located at the side The top of wall.

4. mixing chamber component as claimed in claim 3, it is characterised in that：The mixer is additionally provided with from first flow deflector The fixinig plate that extends of lateral margin, the fixinig plate is welded on the inside of the side plate.

5. mixing chamber component as described in claim 1, it is characterised in that：First hollow-out parts, the 6th hollow-out parts and Five hollow-out parts line up the first row, and second hollow-out parts, third hollow-out parts and the 4th hollow-out parts are lined up flat with the first row The second capable row；

First hollow-out parts are arranged in first row, the 6th hollow-out parts and the third hollow-out parts with second hollow-out parts It is arranged in secondary series, the 5th hollow-out parts are arranged in third row with the 4th hollow-out parts, wherein the secondary series is located at institute First is stated to be listed between the third row.

6. mixing chamber component as claimed in claim 5, it is characterised in that：The framework is trapezoidal comprising interconnection First side, second side, third side and four side, wherein the first side is short side, the third side is Long side.

7. mixing chamber component as claimed in claim 6, it is characterised in that：The mixer includes being erected at the second side With the first partition wall on the four side, first hollow-out parts, the 6th hollow-out parts and the 5th hollow-out parts are located at described The side of first partition wall, second hollow-out parts, third hollow-out parts and the 4th hollow-out parts are located at first partition wall The other side；What second flow deflector extended out from the four side and first partition wall respectively.

8. mixing chamber component as claimed in claim 7, it is characterised in that：The mixer includes being erected at first side Several second partition walls on side, the first partition wall and third side, second partition wall are equipped with third plate, and described the Three fins extend from one end of the third plate, and the 6th fin extends from the other end of the third plate, and described the Three fins are opposite with the inclined direction of the 6th fin.

9. mixing chamber component as claimed in claim 8, it is characterised in that：The mixer includes being erected at the second side And several first plates on that second partition wall of the second side, first fin is from described first Plate extends；The mixer includes being erected at the second side and that second separation near the second side Several second plates on wall, second fin extend from second plate；The mixer includes being erected at described the Four side and several 4th plates on that second partition wall of the four side, the 4th fin is from institute State the extension of the 4th plate；The mixer include be erected at the four side and near the four side that Several 5th plates on two compartment wall, the 5th fin extend from the 5th plate；First flow deflector is self-alignment It extends out in that intermediate second partition wall.

10. the mixing chamber component as described in any one of claim 1 to 9, it is characterised in that：The clockwise is suitable Clockwise or counter clockwise direction.