CN204511591U - A kind of coupled mode automobile three-way catalysts - Google Patents
A kind of coupled mode automobile three-way catalysts Download PDFInfo
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- CN204511591U CN204511591U CN201520061790.4U CN201520061790U CN204511591U CN 204511591 U CN204511591 U CN 204511591U CN 201520061790 U CN201520061790 U CN 201520061790U CN 204511591 U CN204511591 U CN 204511591U
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- carrier
- catalyzing unit
- ternary catalyzing
- coupled mode
- way catalysts
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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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- 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
Abstract
The utility model discloses a kind of coupled mode automobile three-way catalysts, be the modification in construction design that traditional ternary catalyzing unit is carried out, belong to automobile engine exhaust system technical field.Small angle expanding duct (2), increaser (3) are coupled with conical end face carrier (5) by it, described conical end face carrier (5), its termination (4) adopts rounding off, suitable with inlet duct (1) radius, be placed in active section (6) initial position.There is the coupled mode automobile three-way catalysts of said structure, traditional ternary catalyzing unit tail gas radially direct problem of non-uniform can be solved, promote that central gas stream spreads to limit wall, reduce flow separation zone, weaken carrier center zone flow share rate, reduce airflow pressure losses, improve temperature characteristic, be beneficial to exhaust gas conversion, improve ternary catalyzing unit life-span and compact overall structure.
Description
Technical field
The utility model relates to a kind of coupled mode automobile three-way catalysts, is more particularly to carry out modification in construction design to existing ternary catalyzing unit, belongs to automobile engine exhaust system technical field.
Background technique
Environmental protection is the eternal theme of development of automobile, electric vehicle is the ideal substitute of conventional fuel oil internal-combustion engines vehicle, but by the restriction of storage battery energy and the constraint of fuel cell high cost, cannot realize in short time substituting, the progress of vehicle maintenance service technology is still the key solving environmental issue at present comprehensively.Ternary catalyzing unit, as the most effective outer purifier, is widely used.Ternary catalyzing unit adopts catalyzer to strengthen the activity of carbon monoxide, hydrocarbon and oxynitrides three kinds of gases, impels it to carry out certain oxidationreduction chemical reaction, and the harmful matter of effectively degraded motor discharge, makes vehicle exhaust be purified.The ternary catalyzing unit of conventional construction adopts conventional expanding duct to mate the design of planar end surface carrier, is difficult to make tail gas fully be diffused into the whole cross section of catalytic bed, but concentrates on carrier center, tubular area that near axis is less.This causes the true empty-running speed of center region excessive, catalyst loading and temperature too high, rapidly aging; And the most of region air speed around this sharply declines, catalyzer is not fully utilized, the catalyzer that waste is expensive, increases volume and the cost of catalyst converter, shortens the working life of catalyst converter.Uneven simultaneously due to air speed distribution, also can cause carrier on cross section, occur larger temperature gradient, produce thermal stress, make the fragile rhegma of carrier bad.
Chinese patent CN200820134922 discloses " a kind of Novel three-way catalyst carrier ", and carrier inlet end surface is crown surface.It to a certain degree can increase the area of contact of gas and carrier compared with traditional planar end surface carrier, reduces air-flow mean velocity, improves uniform stream coefficient and utilization ratio.But this structure guide face is less, and carrier extends in expanding duct and occupies gas flow space, and turbulence level strengthens, and end face guide functions weakens, and Diffusion of gas stream is insufficient, and radially direct uniformity room for promotion is limited.
Summary of the invention
Technical problem to be solved in the utility model overcomes the uneven deficiency of existing three-way catalytic converter carrier internal gas flow radially direct, a kind of ternary catalyzing unit of enhancement mode expanding duct Coupled Circle tapered end face carrier is provided, can more effective raising tail gas clean-up efficiency, increase the service life.
For solving the problems of the technologies described above, the utility model adopts following technological scheme to be achieved.Partial structurtes transformation is carried out to existing ternary catalyzing unit, utilizes expanding duct moulding, the moulding of carrier end face, carrier positions to move and improve gas flow diametral distribution uniformity.Adopt enhancement mode expanding duct, namely first air-flow flows through a low-angle conical transition pipe, close to during carrier again flaring to whole carrier surface, be beneficial to the diffusion of gas flow to limit wall of catalyst converter near axis; Carrier end face is processed into the taper that drift angle is 90 °, guide functions of having held concurrently simultaneously, promotes that air-flow spreads to axis edge along tapered end face, reduce flow separation zone, weaken the traffic sharing rate in carrier center region.
As preferably, termination adopts rounding off, and diameter is chosen by the radius of ternary catalyzing unit inlet duct, utilizes the rounding off of tapered end face carrier termination and the side direction water conservancy diversion uniform air flow distribution of limit wall.
As preferably, put carrier termination in active section initial position, carrier enters active section, increases diffusion space, weakens turbulence level, strengthens flow distribution evenness.
The beneficial effects of the utility model are: the modification in construction utilizing ternary catalyzing unit, achieve the uniformity of gas flow diametral distribution, reduce airflow pressure losses, improve temperature characteristic, be beneficial to exhaust gas conversion, improve ternary catalyzing unit life-span and compact overall structure.
Accompanying drawing explanation
Fig. 1 is the structural representation of ternary catalyzing unit improvement project;
In figure: 1. inlet duct, 2. small angle expanding duct, 3. increaser, 4. termination, 5. carrier, 6. active section, 7. collapsible tube, 8. outer pipe.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Consult Fig. 1, described ternary catalyzing unit carries out partial structurtes Transform Type design to existing ternary catalyzing unit, extending section is designed to the combination of small angle expanding duct (2) and increaser (3), the front-end face of carrier (5) is designed to taper shape, termination (4) adopts rounding off, and suitable with inlet duct (1) radius, and be placed in active section (6) initial position.Motor discharges pollutants and enters ternary catalyzing unit via inlet duct (1), flow through small angle expanding duct (2), increaser (3), air-flow spreads to limit wall, utilize termination (4) water conservancy diversion, the uniform air-flow of radially direct is by carrier (5) inner catalyst effect, after redox reaction purification, discharge via collapsible tube (7), outer pipe (8).
Ternary catalyzing unit gas flow diametral distribution uniformity compares:
Commonly use operating mode according to automobile, the speed of getting airflow passes inlet duct is 53m/s, and getting 30% carrier center district is example.Conventional expansion pipe coupling planar end surface carrier ternary catalyzing unit evenness index 0.5645; Conventional expansion pipe mates crown end face carrier ternary catalyzing unit evenness index 0.6048; Conventional expansion pipe coupling globose end surface carrier ternary catalyzing unit evenness index 0.6636; Conventional expansion pipe coupling drift angle is 90 ° of conical end face carrier ternary catalyzing unit evenness indexs 0.6677; The ternary catalyzing unit evenness index 0.6944 that tip diameter is suitable with expanding duct radius; Enhancement mode expanding duct mates the coupled mode ternary catalyzing unit evenness index 0.6998 of 90 ° of conical end face carriers; Reach termination is deeply to the ternary catalyzing unit evenness index 0.6263 in extending section.
Commonly use operating mode according to automobile, the speed of getting airflow passes inlet duct is 53m/s, and getting 60% carrier center district is example.Conventional expansion pipe coupling planar end surface carrier ternary catalyzing unit evenness index 0.7587; Conventional expansion pipe mates crown end face carrier ternary catalyzing unit evenness index 0.7933; Conventional expansion pipe coupling globose end surface carrier ternary catalyzing unit evenness index 0.8245; Conventional expansion pipe coupling drift angle is 90 ° of conical end face carrier ternary catalyzing unit evenness indexs 0.8287; The ternary catalyzing unit evenness index 0.8530 that tip diameter is suitable with expanding duct radius; Enhancement mode expanding duct mates the coupled mode ternary catalyzing unit evenness index 0.8354 of 90 ° of conical end face carriers; Reach termination is deeply to the ternary catalyzing unit evenness index 0.8097 in extending section.
Ternary catalyzing unit axial pressure change compares:
Identical with aforementioned case, conventional expansion pipe coupling planar end surface carrier ternary catalyzing unit axial pressure change 1.6029KPa, enhancement mode expanding duct mates the coupled mode ternary catalyzing unit axial pressure change 1.0543KPa of 90 ° of conical end face carriers.
But the utility model is intended to the feasibility that ternary catalyzing unit extending section and tapered end face carrier coupled system and modification in construction thereof are described, and only verifies in analog simulation, test stand aspect.If the utility model achievement can to Industry Promotion through checking, then above-mentioned numeric ratio comparatively can be enterprise and to retrofit from now on and processing provides analysis foundation.
Shown by above-mentioned analysis, partial structurtes transformation is carried out to traditional ternary catalyzing unit, utilize enhancement mode expanding duct to be coupled with conical end face carrier, the problem that traditional ternary catalyzing unit tail gas radially direct is uneven can be solved, improve the efficiency of tail gas clean-up and the working life of ternary catalyzing unit.
Claims (3)
1. a coupled mode automobile three-way catalysts, comprise inlet duct (1), small angle expanding duct (2), increaser (3), carrier (5), collapsible tube (7) and outer pipe (8), it is characterized in that, airflow passes small angle expanding duct (2), increaser (3) spread, the radially direct uniformity of air-flow to carrier surface can be improved, reduce axial pressure change.
2. according to coupled mode automobile three-way catalysts according to claim 1, it is characterized in that, carrier (5) front-end face is designed to taper shape, can promote that air-flow is to the diffusion of carrier limit wall, weakens carrier center zone flow share rate.
3. according to the coupled mode automobile three-way catalysts described in claim 1 or 2, it is characterized in that, the termination (4) of carrier (5) adopts rounding off, suitable with inlet duct (1) radius, and be placed in active section (6) initial position, can flow separation zone be reduced, improve temperature characteristic, improve ternary catalyzing unit life-span and compact overall structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520061790.4U CN204511591U (en) | 2015-01-29 | 2015-01-29 | A kind of coupled mode automobile three-way catalysts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520061790.4U CN204511591U (en) | 2015-01-29 | 2015-01-29 | A kind of coupled mode automobile three-way catalysts |
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| Publication Number | Publication Date |
|---|---|
| CN204511591U true CN204511591U (en) | 2015-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520061790.4U Expired - Fee Related CN204511591U (en) | 2015-01-29 | 2015-01-29 | A kind of coupled mode automobile three-way catalysts |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523098A (en) * | 2016-11-10 | 2017-03-22 | 无锡市明盛强力风机有限公司 | Method for decreasing noise of three-way catalytic converter of automobile |
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2015
- 2015-01-29 CN CN201520061790.4U patent/CN204511591U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523098A (en) * | 2016-11-10 | 2017-03-22 | 无锡市明盛强力风机有限公司 | Method for decreasing noise of three-way catalytic converter of automobile |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150729 Termination date: 20160129 |