CN202391523U - Catalytic converter for vehicle - Google Patents
Catalytic converter for vehicle Download PDFInfo
- Publication number
- CN202391523U CN202391523U CN2011204833389U CN201120483338U CN202391523U CN 202391523 U CN202391523 U CN 202391523U CN 2011204833389 U CN2011204833389 U CN 2011204833389U CN 201120483338 U CN201120483338 U CN 201120483338U CN 202391523 U CN202391523 U CN 202391523U
- Authority
- CN
- China
- Prior art keywords
- right baffle
- cavity
- plate
- catalytic converter
- catalyst carrier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Exhaust Gas After Treatment (AREA)
Abstract
The utility model discloses a catalytic converter for a vehicle. The catalytic converter comprises an upper shell, a lower shell, a front end cover, a rear end cover, a front baffle, a rear baffle, a gas inlet pipe, a gas outlet pipe, a silencing pipe and a catalyst carrier component, wherein the left baffle and the right baffle are spaced in the shell and divide the inner cavity of the shell into a gas inlet cavity, a middle cavity and a gas outlet cavity; the left baffle is provided with multiple ventilation channels to connect the gas inlet cavity with the middle cavity; the right baffle separates the middle cavity from the gas outlet cavity; the gas inlet pipe enters the gas inlet cavity from the side surface of the upper shell and passes through the left baffle to be communicated with the middle cavity; the gas outlet pipe exhausts gas from the side surface of the lower shell; the catalyst carrier component is arranged in the middle cavity and connected between the left baffle and the right baffle; and the left baffle and the right baffle are communicated with the gas inlet cavity and the gas outlet cavity respectively. The catalytic converter disclosed by the utility model has a compact structure, is subjected to CFD-FLUENT software analysis, has good flowing property and mild pressure loss, and realizes certain silencing effect.
Description
Technical field
The utility model patent relates to diesel exhaust aftertreatment system field, relates to the catalytic converter that vehicle exhaust is handled in particular.
Background technique
Diesel engine is all having remarkable advantages than petrol engine aspect power character, Economy and the reliability, particularly CO
2Discharge lowly, its purposes expands on all kinds of vehicles gradually.But it is nitrogen oxide (NO that there is maximum problem in diesel engine
x) and particulate matter (PM) discharging seriously.Along with Chinese emission control regulations are more and more tighter, and homemade DENG performance and oil product problem, depend the emission controls by improving combustion measure alone and seem unable to do what one wishes, therefore be necessary to take the outer after-treatment device of machine to reach emissions object.
Diesel motor exhaust SCR technology (SCR) is the outer post-processing technology of a kind of machine of vehicle diesel engine, can effectively improve diesel engine NO
xDischarging, and insensitive to the diesel oil sulphur content.This technology is through spraying into certain density urea liquid, the NH that after pyrolysis (reaction 1) and hydrolysis (reaction 2), produces in outlet pipe
3And NO
xReduction reaction (reaction 3-5) takes place in catalytic converter, with NO
xBe converted into H
2O and N
2
(NH
2)
2CO→NH
3+HNCO (1)
H
2O+HNCO→NH
3+CO
2 (2)
4NO+4NH
3+O
2→4N
2+6H
2O (3)
2NH
3+NO+NO
2→2N
2+3H
2O (4)
6NO
2+8NH
3→7N
2+12H
2O (5)
For the main evaluation index of the catalytic converter that is used for the diesel engine vent gas processing, can estimate by following index:
1, the distribution of fluid between each catalyst carrier and the flow uniformity value of each catalyst carrier front-end face.
Improve the mass flow distribution of tail gas between each catalyst carrier, help improving the utilization ratio of carried catalyst, improve the transformation efficiency of catalyzer; Help reducing the pressure loss of air-flow on catalyst carrier; Help catalyst carrier and reach initiation temperature faster.
2, the pressure loss of system
A part of whole vent systems during the pressure loss of catalytic converter, the pressure loss that reduces catalytic converter helps reducing the back pressure of vent systems, thereby helps improving the performance of motor.
3, air speed
The size of air speed has been reacted the waiting time of air-flow on catalyst carrier.Air speed is more little, and the waiting time of air-flow in catalyst carrier is long more, and transformation efficiency is just high more.
4, acoustic insertion loss
Summary of the invention
The purpose of the utility model is to provide a kind of good flowing properties, crushing moderate, and has noise elimination function, is used for the catalytic converter that vehicle exhaust is handled.
For realizing above purpose, the technological scheme that this patent adopts is:
A kind of automotive catalytic converter; Comprise upper shell, lower shell body; Left end cap, right end cap; Right baffle-plate, right baffle plate, suction tude, steam outlet pipe, hush pipe and catalyst carrier assembly is characterized in that described right baffle-plate and right baffle interval are arranged in the housing, and the housing inner chamber are divided into air-inlet cavity, lumen and outlet chamber; Described catalyst carrier assembly is arranged on the central position in the described lumen; And be connected between right baffle-plate and the right baffle plate; And be communicated with described air-inlet cavity and outlet chamber respectively, form an annular cavity with described air-inlet cavity UNICOM between described catalyst carrier assembly and described upper shell and the lower shell body; Described suction tude one end links to each other with engine exhaust pipe; The other end enters in the described annular cavity after passing described upper shell and right baffle-plate; And with described right baffle plate sealing and fixing, said suction tude is positioned on the body of said annular cavity part and offers a plurality of vents; Described hush pipe is arranged in the described annular cavity, and is connected between described right baffle-plate and the right baffle plate, and described hush pipe is provided with a plurality of vents; Described steam outlet pipe is connected with said lower shell body.
According to the utility model, described suction tude gets into air-inlet cavity from the upper shell side.
Be connected with the lower shell body side according to the described steam outlet pipe of the utility model.
According to the utility model, the catalyst carrier assembly totally 1 group and be arranged on air-inlet cavity and outlet chamber between, the catalyst carrier assembly comprises carrier, be coated on the outer liner of carrier and be coated on the outer housing of liner.Carrier is a cylindrical structural, is provided with many parallel channels that run through both ends of the surface in the carrier vertically, and the internal surface of each passage is provided with catalyst coat.Housing and liner can be protected and holding carrier, prevent that carrier lost efficacy at work.
As everyone knows, for the urea SCR system, more common problem be exactly from the urea liquid that nozzle ejection goes out before reaching catalyst carrier, can not evaporate fully, pyrolysis, thereby can't mix fully with tail gas, reach higher NO
XConversion ratio.In order to solve the evaporation hydrolysis problem of urea, the measure of generally taking is the distance between extended jet nozzle and the catalyst carrier, makes urea liquid that sufficient evaporation and hydrolysis space arranged.Perhaps in pipeline, add mixer.But the distance that increases between nozzle and the catalyst carrier can cause that tail gas partly dispels the heat too much in suction tude, and is unfavorable to catalytic reduction reaction, also can be difficult to satisfy the entrucking requirement because of the long difficult in arrangement that causes of pipeline.Increase pipe-line mixer and not only increased system back pressure, also can increase the design cost of whole catalyst system.Need design a kind of admission line, this admission line promptly can satisfy the spatial requirement of urea evaporation hydrolysis, can reduce arrangement space again as far as possible, reduces radiation loss, and reduces system cost as far as possible for this reason.
The characteristics of the utility model are: suction tude has long segment pipe in catalyzed conversion silencing apparatus inside, and exists a bend pipe, bend pipe rear end that perforation is set to be used for being uniformly distributed with of air-flow.After exhaust and urea liquid got into catalyst converter, the pipeline before bend pipe evaporated, hydrolysis and mixing, and perforated gets into the catalyst converter inner chamber behind bend pipe.Because temperature is higher in the catalyst converter, and heat insulation effect is better, therefore more help the evaporation and the hydrolysis of urea liquid.The heat insulation effect of catalyst converter casing can also effectively prevent the generation of urea liquid in the inner-walls of duct crystallization.
Be employed in the admission line that catalyst converter inside curves, the evaporation and the pyrolysis that not only can well solve urea liquid need longer pipe road problem, can also solve whole catalytic converter spatial arrangement installation question.Compact structure, form is simple.
A kind of catalytic converter that is used for the diesel engine vent gas processing of the utility model shows that it has good flowing properties, moderate advantage and the characteristics of crushing, and has the effect of certain noise elimination through CFD-FLUENT flow analysis and acoustic analysis demonstration.
Description of drawings
Fig. 1 is the internal structure detail drawing of a kind of automotive catalytic converter of the utility model.
Fig. 2 is the plan view of the utility model.
Fig. 3 is the left view of the utility model.
Fig. 4 is the A-A sectional drawing of the utility model Fig. 2.
Fig. 5 is the B-B sectional drawing of the utility model Fig. 2.
Fig. 6 is the structural representation of the utility model right baffle-plate.
Fig. 7 is the utility model catalyst carrier component drawings.
Wherein: the 1-air-inlet cavity; The 2-lumen; The 3-outlet chamber; The 4-suction tude; The 5-right baffle-plate; The 6-left end cap; The 7-hush pipe; 8-catalyst carrier assembly; The right baffle plate of 9-; The 10-steam outlet pipe; The 11-right end cap; The 12-upper shell; The 13-lower shell body; Annular cavity in the 21-lumen; Through hole on the 41-suction tude; The centre gangway of 51-right baffle-plate; First through hole of 52-right baffle-plate; Second through hole of 53-right baffle-plate; Passage around the 54-right baffle-plate; Through hole on the 71-hush pipe; The 81-carrier; The liner of 82-catalyst carrier assembly; The housing of 83-catalyst carrier assembly.
Embodiment
Referring to Fig. 1 to Fig. 5; The automotive catalytic converter of the utility model; Comprise upper shell 12, lower shell body 13, left end cap 6, right end cap 11, right baffle-plate 5, right baffle plate 9, suction tude 4, steam outlet pipe 10, hush pipe 7 and catalyst carrier assembly 8; It is characterized in that described right baffle-plate 5 and right baffle plate 9 are arranged in the housing at interval, and the housing inner chamber is divided into air-inlet cavity 1, lumen 2 and outlet chamber 3; Described catalyst carrier assembly 8 is arranged on the central position in the described lumen 2; And be connected between right baffle-plate 5 and the right baffle plate 9; And is communicated with the annular cavity 21 of one of formation and described air-inlet cavity 1 UNICOM between described catalyst carrier assembly 8 and described upper shell 12 and the lower shell body 13 respectively with described air-inlet cavity 1 and outlet chamber 3; Described suction tude 4 one ends link to each other with engine exhaust pipe; The other end enters in the described annular cavity 21 after passing side and the right baffle-plate 5 of described upper shell 12; And with described right baffle plate 9 sealing and fixing, said suction tude is positioned on the body of said annular cavity part and offers a plurality of vents 41; Described hush pipe 7 is arranged in the described annular cavity 21, and is connected between described right baffle-plate 5 and the right baffle plate 9, and described hush pipe 7 is provided with a plurality of vents 71; Described steam outlet pipe 10 is connected with the side of said lower shell body 13.
With reference to Fig. 6, described right baffle-plate 5 be provided with UNICOM's air-inlet cavity 1 and catalyst carrier assembly 8 centre gangway 51, first through hole 52 that supplies that said suction tude 4 passes through, is connected the said air-inlet cavity 1 of second through hole 53 and UNICOM of said hush pipe 7 and the passage 54 on every side of annular cavity 21.
Right baffle-plate is provided with a plurality of venting channels air-inlet cavity is communicated with lumen.Right baffle plate is cut apart lumen and outlet chamber.Suction tude links to each other with engine exhaust pipe, and gets into air-inlet cavity from the upper shell side, passes right baffle-plate and is communicated with lumen.Steam outlet pipe is given vent to anger from the lower shell body side.The catalyst carrier assembly is arranged in the lumen, and is connected between right baffle-plate and the right baffle plate, and is communicated with air-inlet cavity and outlet chamber respectively.Suction tude is provided with a plurality of vents.Hush pipe is arranged between right baffle-plate and the right baffle plate, and hush pipe is communicated with air-inlet cavity, and on hush pipe, is provided with a plurality of vents.
Referring to Fig. 7, the catalyst carrier assembly comprises carrier 81, is coated on the outer liner 82 of carrier and is coated on the outer housing 83 of liner.Carrier 81 is a cylindrical structural, is provided with many parallel channels in the carrier vertically and runs through both ends of the surface, and the internal surface of each passage is provided with catalyst coat.Housing and liner can be protected and holding carrier, prevent that carrier lost efficacy at work.
The working principle of the utility model is following: exhaust gets into converter from suction tude 4; Enter into annular cavity 21 from through hole 71; Passage on every side 54 through on the right baffle-plate gets into air-inlet cavitys 1; Again through catalyst carrier assembly 8 carry out catalytic reaction with exhaust gas purification after in the outlet chamber 3, at last from steam outlet pipe 10 rows to atmosphere.
A kind of automotive catalytic converter of the utility model shows that it has good flowing properties, moderate advantage and the characteristics of crushing, and has certain noise elimination effect through CFD-FLUENT flow analysis and acoustic analysis demonstration.
What should be understood that is: the foregoing description is just to the explanation of the utility model, rather than to the restriction of the utility model, any innovation and creation that do not exceed in the utility model connotation scope all fall within the protection domain of the utility model.
Claims (6)
1. automotive catalytic converter; Comprise upper shell (12), lower shell body (13); Left end cap (6), right end cap (11); Right baffle-plate (5), right baffle plate (9), suction tude (4), steam outlet pipe (10), hush pipe (7) and catalyst carrier assembly (8) is characterized in that described right baffle-plate (5) and right baffle plate (9) are arranged in the housing at interval, and the housing inner chamber are divided into air-inlet cavity (1), lumen (2) and outlet chamber (3); Described catalyst carrier assembly (8) is arranged on the central position in the described lumen (2); And be connected between right baffle-plate (5) and the right baffle plate (9); And be communicated with described air-inlet cavity (1) and outlet chamber (3) respectively, form an annular cavity (21) with described air-inlet cavity (1) UNICOM between described catalyst carrier assembly (8) and described upper shell (12) and the lower shell body (13); Described suction tude (4) one ends link to each other with engine exhaust pipe; The other end enters in the described annular cavity (21) after passing described upper shell (12) and right baffle-plate (5); And with described right baffle plate (9) sealing and fixing, said suction tude is positioned on the body of said annular cavity part and offers a plurality of vents (41); Described hush pipe (7) is arranged in the described annular cavity (21), and is connected between described right baffle-plate (5) and the right baffle plate (9), and described hush pipe (7) is provided with a plurality of vents (71); Described steam outlet pipe (10) is connected with said lower shell body (13).
2. a kind of automotive catalytic converter as claimed in claim 1, it is characterized in that described right baffle-plate (5) be provided with the centre gangway (51) of UNICOM's air-inlet cavity (1) and catalyst carrier assembly (8), supply first through hole (52), the said air-inlet cavity of second through hole (53) and UNICOM (1) that is connected said hush pipe (7) and annular cavity (21) that said suction tude (4) passes through around passage (54).
3. a kind of automotive catalytic converter as claimed in claim 1 is characterized in that described suction tude (4) gets into air-inlet cavity (1) from upper shell (12) side.
4. a kind of automotive catalytic converter as claimed in claim 1 is characterized in that described steam outlet pipe (10) is connected with lower shell body (13) side.
5. a kind of automotive catalytic converter as claimed in claim 1; It is characterized in that described catalyst carrier assembly (8) totally 1 group and be arranged on air-inlet cavity (1) and outlet chamber (3) between, catalyst carrier assembly (8) comprises carrier (81), be coated on the outer liner (82) of carrier and be coated on liner housing (83) outward.
6. a kind of automotive catalytic converter as claimed in claim 5 is characterized in that described carrier (81) is a cylindrical structural, is provided with many parallel channels that run through both ends of the surface in the carrier vertically, and the internal surface of each passage is provided with catalyst coat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204833389U CN202391523U (en) | 2011-11-29 | 2011-11-29 | Catalytic converter for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204833389U CN202391523U (en) | 2011-11-29 | 2011-11-29 | Catalytic converter for vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202391523U true CN202391523U (en) | 2012-08-22 |
Family
ID=46666453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204833389U Expired - Lifetime CN202391523U (en) | 2011-11-29 | 2011-11-29 | Catalytic converter for vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202391523U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493859A (en) * | 2011-11-29 | 2012-06-13 | 杭州银轮科技有限公司 | Vehicle catalytic converter |
-
2011
- 2011-11-29 CN CN2011204833389U patent/CN202391523U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493859A (en) * | 2011-11-29 | 2012-06-13 | 杭州银轮科技有限公司 | Vehicle catalytic converter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120822 |