CN106499482A - A kind of ternary catalyzing unit for having noise elimination effect concurrently - Google Patents
A kind of ternary catalyzing unit for having noise elimination effect concurrently Download PDFInfo
- Publication number
- CN106499482A CN106499482A CN201610988997.5A CN201610988997A CN106499482A CN 106499482 A CN106499482 A CN 106499482A CN 201610988997 A CN201610988997 A CN 201610988997A CN 106499482 A CN106499482 A CN 106499482A
- Authority
- CN
- China
- Prior art keywords
- catalyzing unit
- ternary catalyzing
- cone angle
- acoustic filter
- noise
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
-
- 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
- F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
- F01N3/2885—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices with exhaust silencers in a single housing
Abstract
The invention discloses a kind of ternary catalyzing unit, the ternary catalyzing unit entrance expansion pipe cone angle is not more than 120 °, and exit constriction pipe cone angle is between 30 ° 60 °.The present invention is by arranging specific angle in ternary catalyzing unit so that tail gas can reduce sound when ternary catalyzing unit is flowed through, so that the ternary catalyzing unit has the effect of acoustic filter concurrently, can omit acoustic filter in gas exhaust piping.
Description
Technical field
A kind of the present invention relates to automobile noise reduction technical field, more particularly to ternary catalyzing unit for reducing car noise.
Background technology
The traffic noise of automobile is the main source of city noise pollution, and wherein exhaust noise is the main noise of automobile
Source.The main source of exhaust noise has：The radiated noise of discharge duct radiation, the case noise of acoustic filter Wall Radiation, aerofluxuss
There is leakage sound caused by gap in tailpipe exit air-flow radiation sound and system coupling part.
Exhaust silencer is installed in gas extraction system, reduces can automobile engine to exhaust pulsation, aerofluxuss can be made again to make an uproar
Sound reduces.Exhaust silencer is according to noise elimination mechanism the impedance complex for being divided into dissipative muffler, reactive muffler and both combine
Three class of formula acoustic filter.Resistive acoustic filter using the sound-absorbing material in acoustic filter into sound absorption structure, make along pipe transmmision make an uproar Lu with
The increase of propagation distance and absorbed, so as to damping capacity, reach the purpose of noise elimination.Anti- formula acoustic filter is by pipeline section
Sudden enlargement and contraction, or side connects resonant cavity, the noise along pipe transmmision is gone to sound source reflection at mutation, and is not passed through
Acoustic filter, reaches the purpose of noise elimination with this.The characteristics of impedance composite muffler has the two concurrently, can obtain in wider frequency range
Obtain higher sound deadening capacity.
The ratio of acoustic filter total measurement (volume) and engine displacement between 3-5, due to kart exhaustor short, three-element catalytic
Device installing space is very little, limits the installation of aerofluxuss duct member.Simultaneously as widely using for low back pressure gas extraction system, more
Individual part is installed in exhaustor, certainly will cause the lifting of exhaust back pressure.Given this reason, after ternary catalyzing unit is installed, such as
Fruit gasoline engine does not install acoustic filter, can effectively reduce aerofluxuss and be pressed, and improves engine performance, and reduces installing space.
Therefore three-way catalyst has noise reduction capability concurrently, is the focus of this area development.
Content of the invention
It is an object of the invention to proposing a kind of ternary catalyzing unit, the work that ternary catalyzing unit has acoustic filter concurrently is enabled to
With so as to acoustic filter need not be installed on gas exhaust piping, or according to small-sized acoustic filter, you can meet the criteria for noise of country.
It is that the present invention is employed the following technical solutions up to this purpose：
A kind of ternary catalyzing unit, the ternary catalyzing unit entrance expansion pipe cone angle are not more than 120 °, exit constriction pipe cone angle
Between 30 ° -60 °.
When noise frequency is less than 400Hz, when expansion pipe cone angle is less than 120 °, with the change of cone angle, sound deadening capacity is almost
Be not changed in, and cone angle when increasing to more than 120 ° sound deadening capacity then occur declining with the increase of cone angle, soundproof effect is deteriorated, because
The entrance expansion pipe cone angle that this present invention is adopted is less than 120 °.
For increasing the acoustical absorptivity of the ternary catalyzing unit, catalyst that its inside of preferred pair loads is improved.It is preferred that
, in ternary catalyzing unit, catalyst carrier makes W types, and its order stacking forms complete vector, and the carrier is in ternary catalyzing unit
In be divided at least 2 sections, between per section be spaced 20-40mm, the porosity of the carrier is between 20%-30%.
The present invention by carrier is arranged to W types order stacking, meet to discharge directions, therefore aerofluxuss by the V-type side of W types
4 sides of W type carriers are needed guiding through, simultaneously as the carrier has porosity, aperture on its side, is distributed with, aerofluxuss exist
Through spread all over aperture W sides when, speed is gradually reduced, and friction loss gradually increases so that sound is gradually lowered.
In the ternary catalyzing unit of the present invention, carrier is placed in one, but there is interval, forms cavity.This is
Because carrier has resistive and reactive muffling mechanism simultaneously, the cavity between carrier equivalent to an expansion chamber is formed, so as to have
Resistant noise elimination effect.
The present invention is by arranging specific angle in ternary catalyzing unit so that tail gas when ternary catalyzing unit is flowed through, energy
Enough reduce sound, so that the ternary catalyzing unit has the effect of acoustic filter concurrently, acoustic filter can be omitted in gas exhaust piping.
Specific embodiment
Embodiment 1
A kind of ternary catalyzing unit, the ternary catalyzing unit entrance expansion pipe cone angle is 110 °, and exit constriction pipe cone angle is
60 °, in the catalyst converter, it is mounted with pellet type catalyst.
Embodiment 2
A kind of ternary catalyzing unit, the ternary catalyzing unit entrance expansion pipe cone angle is 110 °, and exit constriction pipe cone angle is
45 °, in the ternary catalyzing unit, catalyst carrier makes W types, and its order stacking forms complete vector, and the carrier is urged in ternary
Change in device and be divided into 4 sections, between per section, be spaced 20mm, the porosity of the carrier is 30%.
Through detection, after installing the ternary catalyzing unit on gas exhaust piping and cancelling acoustic filter, its noise is less than
62dB, the noise in embodiment 2 are even more less than 48dB, comply fully with the requirement of laws and regulations.
Claims (2)
1. a kind of ternary catalyzing unit, the ternary catalyzing unit entrance expansion pipe cone angle are not more than 120 °, and exit constriction pipe cone angle is situated between
Between 30 ° -60 °.
2. ternary catalyzing unit as claimed in claim 1, loads W type catalyst carriers, its order heap in the ternary catalyzing unit
Fold and form complete vector, the carrier is divided at least 2 sections in ternary catalyzing unit, between per section, be spaced 20-40mm, the carrier
Porosity between 20%-30%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610988997.5A CN106499482A (en) | 2016-11-10 | 2016-11-10 | A kind of ternary catalyzing unit for having noise elimination effect concurrently |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610988997.5A CN106499482A (en) | 2016-11-10 | 2016-11-10 | A kind of ternary catalyzing unit for having noise elimination effect concurrently |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106499482A true CN106499482A (en) | 2017-03-15 |
Family
ID=58323838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610988997.5A Pending CN106499482A (en) | 2016-11-10 | 2016-11-10 | A kind of ternary catalyzing unit for having noise elimination effect concurrently |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106499482A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201874648U (en) * | 2010-05-28 | 2011-06-22 | 余小玲 | Mesh-type catalytic converter |
| CN201874642U (en) * | 2010-09-25 | 2011-06-22 | 苏州派格力减排系统有限公司 | SCR (Selective Catalytic Reduction) catalyzing muffler |
| CN202431342U (en) * | 2011-12-20 | 2012-09-12 | 郑州精益达汽车零部件有限公司 | Three-way catalytic converter for vehicle |
| CN203742728U (en) * | 2014-01-23 | 2014-07-30 | 南京劲鸿茂科技有限公司 | Metal carrier used for catalysts of bell-mouth shell |
-
2016
- 2016-11-10 CN CN201610988997.5A patent/CN106499482A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201874648U (en) * | 2010-05-28 | 2011-06-22 | 余小玲 | Mesh-type catalytic converter |
| CN201874642U (en) * | 2010-09-25 | 2011-06-22 | 苏州派格力减排系统有限公司 | SCR (Selective Catalytic Reduction) catalyzing muffler |
| CN202431342U (en) * | 2011-12-20 | 2012-09-12 | 郑州精益达汽车零部件有限公司 | Three-way catalytic converter for vehicle |
| CN203742728U (en) * | 2014-01-23 | 2014-07-30 | 南京劲鸿茂科技有限公司 | Metal carrier used for catalysts of bell-mouth shell |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170315 |
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| WD01 | Invention patent application deemed withdrawn after publication |