CN206972339U - A kind of purifying muffler for being used for 1100 single cylinder diesels - Google Patents
A kind of purifying muffler for being used for 1100 single cylinder diesels Download PDFInfo
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- CN206972339U CN206972339U CN201720783659.8U CN201720783659U CN206972339U CN 206972339 U CN206972339 U CN 206972339U CN 201720783659 U CN201720783659 U CN 201720783659U CN 206972339 U CN206972339 U CN 206972339U
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- shell body
- single cylinder
- perforated clapboard
- perforation
- air
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Abstract
The utility model discloses a kind of purifying muffler for being used for 1100 single cylinder diesels, the silencer includes shell body, shell body upper and lower ends are provided with gas outlet and air inlet, shell body bosom position is provided with oxidation catalyst carrier, oxidation catalyst carrier both ends are positioned by two pieces of location-plates respectively, two pieces of location-plates respectively with shell body bottom, inlet plenum and discharge chamber are formed between top, inlet plenum is divided into the first expansion chamber and the first pressure stabilizing cavity by the air-flow Perforated clapboard being placed on shell body inwall, discharge chamber is divided into the second expansion chamber and the second pressure stabilizing cavity by the outlet Perforated clapboard being placed on shell body inwall, outlet Perforated clapboard is provided with perforation escape pipe, perforation escape pipe top connects with gas outlet.The utility model plays noise elimination rectified action using Perforated clapboard to air-flow, and perforation distributions reasonable in design are so that air-flow more uniform flows oxidation catalyst carrier, so as to improve the efficiency of catalyst and life-span, hence it is evident that reduces diesel emission and noise.
Description
Technical field
The utility model belongs to silencer field, and in particular to a kind of purifying muffler for being used for 1100 single cylinder diesels.
Background technology
Chinese single cylinder diesel output and usage amount maintain the leading position in the world, and annual production accounts for world's annual production
More than 90%, thing followed problem of environmental pollution also increasingly highlights, and internal combustion engine industry is also gradually de- not with energy-saving and emission-reduction
Open union system.
China has promulgated the discharge standard of non-rice habitats diesel engine state three, and traditional emission controls by improving combustion comes for single cylinder diesel
Say, it is difficult to meet the standard of state three and later stricter Abgasgesetz；The noise of internal combustion engine is also in pollution sources
Critical role, the control of noise pollution is highlighted in national standard.Traditional single-cylinder diesel engine silencer is by expansion chamber, interior mostly
The compositions such as intubation, perforated plate, resonant cavity and expansion pipe, it is this kind of only by optimizing the silencer of tail gas in machine in single cylinder diesel
Noise elimination effect has been only served during use, has been extremely difficult to the requirement of the standard of state three.Therefore, a kind of tail gas clean-up is designed to eliminate the noise
Device, it will eliminate the noise with catalyzed combination in one, collaboration optimization is with extremely urgent up to national standard.
Utility model content
A kind of purifying muffler for being used for 1100 single cylinder diesels is the utility model is related to, is combined using simulation with experiment
Design method, using 1100 single cylinder diesel original machine silencers as contrast, by design optimization purifying muffler internal structure from
And reach the purpose for reducing exhaust noise.
The technical solution of the utility model is as follows：
A kind of purifying muffler for being used for 1100 single cylinder diesels, including cylindrical shell body, the shell body upper and lower two
End is respectively equipped with gas outlet and air inlet, and shell body bosom position is provided with oxidation catalyst carrier, the oxidation catalyst
The both ends of carrier are positioned by two pieces of location-plates respectively, and two pieces of location-plates form inlet plenum between shell body bottom, top respectively
And discharge chamber, the inlet plenum are divided into the first expansion chamber and the first voltage stabilizing by the air-flow Perforated clapboard being placed on shell body inwall
Chamber, the discharge chamber are divided into the second expansion chamber and the second pressure stabilizing cavity, institute by the outlet Perforated clapboard being placed on shell body inwall
State outlet Perforated clapboard upper end and be provided with perforation escape pipe, the perforation escape pipe top connects with gas outlet.
In such scheme, the shell body is divided into upper shell and lower house, and sealing welding is consolidated between upper shell and lower house
It is fixed.
In such scheme, the oxidation catalyst carrier periphery is wrapped up by tubbiness metal-back, the tubbiness metal-back periphery
Wrapped up by asbestos heat-insulation layer.
In such scheme, perforation is equipped with the air-flow Perforated clapboard and outlet Perforated clapboard.
In such scheme, the perforation outlet tube wall is provided with hole, and escape pipe lower end sealing of perforating.
In such scheme, the distance of the air-flow Perforated clapboard to oxidation catalyst carrier lower surface is 25mm.
In such scheme, the distance of the air-flow Perforated clapboard to lower house bottom end face is 18mm.
In such scheme, the perforation it is uniform and it is regular be distributed on the center of circle and several concentric circles, and perforate
A diameter of 6mm.
In such scheme, the gross area of the perforation on the air-flow Perforated clapboard for 1.5 times of air inlet open area and more than.
The utility model has advantages below：
The utility model is to reach oxidation by the distribution of the perforation on optimization airflow Perforated clapboard and outlet Perforated clapboard
The more uniform purpose of catalytic carrier internal gas flow, air-flow, which flows uniformly through oxidation catalyst, can make CO, HC, PM transformation efficiency
Improve, reduce catalyst amount, carrier service life is also elongated；The utility model is also combined by numerical simulation with experiment,
Air-flow Perforated clapboard is obtained to the distance of oxidation catalyst carrier lower surface and lower house bottom end face, is disappeared so as to improve purification
Sound device internal structure, each noise elimination original paper is more efficiently coordinated with catalytic carrier, preferably reduce the exhaust noise of engine.
Brief description of the drawings
Fig. 1 is the utility model purifying muffler front view；
Fig. 2 is the puncturing scheme figure of different Perforated clapboards；
Fig. 3 is different puncturing scheme speed cloud atlas；
Fig. 4 is outlet Perforated clapboard structural representation；
Fig. 5 is oxidation catalyst carrier entrance section speed cloud atlas；
Fig. 6 is speed cloud atlas at air-flow Perforated clapboard；
Fig. 7 is perforation escape pipe expanded view.
Description of reference numerals：1- air inlets, the expansion chambers of 2- first, 3- air-flows Perforated clapboard, the pressure stabilizing cavities of 4- first, 5- positioning
Plate, 6- oxidation catalyst carriers, 7- asbestos heat-insulation layer, the expansion chambers of 8- second, 9- outlets Perforated clapboard, the pressure stabilizing cavities of 10- second,
11- perforation escape pipe, 12- gas outlets, 13- silencers upper shell, 14- silencers lower house, 15- perforation.
Embodiment
The description of embodiment is carried out to the utility model below in conjunction with accompanying drawing：
As shown in figure 1, a kind of purifying muffler for being used for 1100 single cylinder diesels includes cylindrical shell body, shell body point
For upper shell 13 and lower house 14, sealing welding is fixed between upper shell 13 and lower house 14, and shell body upper and lower ends are set respectively
There are gas outlet 12 and air inlet 1；Shell body bosom position is provided with the oxidation catalyst carrier 6 of tubbiness metal-back parcel, and
The inward flange of metal-back and annular location-plate 5, which is fixed, to be welded, and metal-back periphery is wrapped in one layer of asbestos heat-insulation layer 7, for protecting
Card diesel engine catalyst in low speed, Smaller load has enough temperature ignitions, so as to widen the working range of catalyst；Oxidation is urged
The both ends of agent carrier 6 are positioned by two pieces of annular location-plates 5 respectively, and two pieces of location-plates 5 are respectively between shell body bottom, top
Form inlet plenum and discharge chamber, inlet plenum are divided for the first expansion chamber 2 by the air-flow Perforated clapboard 3 being placed on shell body inward flange
With the first pressure stabilizing cavity 4, discharge chamber is divided for the second expansion chamber 8 and by the outlet Perforated clapboard 9 being placed on shell body inward flange
Two pressure stabilizing cavities 10；The upper end of outlet Perforated clapboard 9 is directly welded with hollow perforation escape pipe 11, is set on the tube wall of escape pipe 11 of perforating
There is hole (Fig. 7, rectangle iron plate is rolled be surrounded by cylindrical shape be welded into perforation escape pipe 11), and escape pipe 11 lower end of perforating is close
Envelope, the perforation top of escape pipe 11 connect with gas outlet 12, are opened on the end face of outlet Perforated clapboard 9 and outside perforation escape pipe 11
There is perforation 15, as shown in Figure 4.
Because the diameter of air inlet 1 differs larger with the diameter of oxidation catalyst carrier 6, diesel exhaust gas is from air inlet 1
When flowing to oxidation catalyst carrier 6 air-flow can only from carrier center part by outflow, make carrier flow field uneven, be this two
Air-flow Perforated clapboard 3 is set between person, it is therefore an objective to which the interior air-flow field of oxidation catalyst carrier 6 is uniform.Air-flow Perforated clapboard 3, which is provided with, to be worn
Hole 15, according to Hydrodynamics Theory, purifying muffler internal gas flow can regard three dimensional compressible VISCOUS FLOW as, use
Fluent softwares, sunykatuib analysis is carried out to the practical structures of purifying muffler, speed cloud atlas pair corresponding to the scheme designed as Fig. 2
Air-flow Uniform Flow preferred plan is found out than analysis.
In Fig. 2,15 center of circle of perforating uniformly is distributed in using the center of Perforated clapboard as on the donut in the center of circle；Scheme
1st, in 2 the annular radii of six concentric circles be respectively 12,22,30,38,46,54mm, the annulus half of seven concentric circles in scheme 3
Footpath is respectively 0,12,22,30,38,46,54mm, pass through the distribution of different perforation, improve airflow homogeneity.As shown in figure 3, side
More small compared with the first two scheme in the air-flow blind area of case 3, therefore the perforation arrangement of scheme 3 is selected as next step Research foundation.
In scheme 3, the number of perforation 15 is multiplied with six multiple from inside to outside by home position on each donut, and is perforated
15 a diameter of 6mm.
The present embodiment design kinds of schemes research air-flow Perforated clapboard 3 arrives the distance L1 of the bottom end face of lower house 14 to carrier
Interior air-flow uniformity influences, and Fig. 5 is three scheme flow field simulation results, and L1 is respectively 8mm, 18mm, 28mm, it can be seen that air-flow is worn
Air flow method is most uniform when distance of the hole dividing plate 3 to the bottom end face of lower house 14 is 18mm；In addition, design kinds of schemes research gas
Flow Perforated clapboard 3 influences to the distance L2 of the lower surface of oxidation catalyst carrier 6 on carrier interior air-flow uniformity, and Fig. 6 is three sides
Case flow field simulation result, L2 are respectively 15mm, 20mm, 25mm, it can be seen that air-flow Perforated clapboard 3 is arrived under oxidation catalyst carrier 6
Air flow method is most uniform when the distance of end face is 25mm；So that it is determined that air-flow Perforated clapboard 3 to lower house 14 bottom end face away from
From for 18mm, the distance of air-flow Perforated clapboard 3 to the lower surface of oxidation catalyst carrier 6 is 25mm.
The gross area of perforation 15 on air-flow Perforated clapboard 3 is 1.5 times of the area of air inlet 1.
The course of work for the purifying muffler that the utility model is related to is as follows：
The flow direction of off-gas flows of 1100 single cylinder diesels discharge is：First expansion chamber 2 is entered, through gas by air inlet 1
Flow Perforated clapboard 3, into the first pressure stabilizing cavity 4, then by oxidation catalysis carrier 6, subsequently enter the second expansion chamber 8, then lead to
Cross outlet Perforated clapboard 9 and enter the second pressure stabilizing cavity 10, last off-gas flows pass through escape pipe 11 of perforating, the discharge purification of gas outlet 12
Silencer.Wherein air-flow Perforated clapboard 3, the first pressure stabilizing cavity 4 play rectified action to off-gas flows；First expansion chamber 2, air-flow are worn
Hole dividing plate 3, the second expansion chamber 8, outlet Perforated clapboard 9, the second pressure stabilizing cavity 10, perforation escape pipe 11 and gas outlet 12 are risen to air-flow
Noise elimination acts on；Oxidation catalyst carrier 6 also functions to certain noise elimination effect to the main aseptic of off-gas flows.
The purification silencing optimized designed by former machine silencer and the utility model is installed respectively on 1100 single cylinder diesels
Device, two kinds of silencers are subjected to discharge contrast test, experiment is carried out by GB/T8190.4 eight operating mode C1 Emission test cycles, row
It is as shown in table 1 to put result.
The diesel emission result of the working condition tests of table 1 eight circulation
Former machine silencer is installed as known from Table 1, CO, HC, PM are respectively 2.94,1.06,0.56g/ (kWh)；Install excellent
Change after-purification silencer, CO, HC, PM are respectively 0.38,0.35,0.41g/ (kWh), reduced respectively compared to former machine
87.1%th, 67.0%, 26.8%.Former silencer is far below using the discharge of the utility model purifying muffler diesel engine, and is reached
To the discharge standard requirement of state three, compared compared with the existing structure in market, reach same emission effect, about 20% your gold can be used less
Metal catalyst amount；Compared with former machine silencer, diesel engine noise is horizontal also below former machine；Purifying muffler carrier interior air-flow flow field
Uniformly, the service life of purifying muffler can also be improved.
Above example is merely to illustrate design philosophy and feature of the present utility model, in the art its object is to make
Technical staff can understand content of the present utility model and implement according to this, and the scope of protection of the utility model is not limited to above-mentioned implementation
Example.So equivalent variations that all principle, mentalities of designing according to disclosed in the utility model are made or modification, in this practicality
Within new protection domain.
Claims (9)
- A kind of 1. purifying muffler for being used for 1100 single cylinder diesels, it is characterised in that including cylindrical shell body, the shell Body upper and lower ends are respectively equipped with gas outlet (12) and air inlet (1), and shell body bosom position is provided with oxidation catalyst carrier (6), oxidation catalyst carrier (6) both ends are positioned by two pieces of location-plates (5) respectively, two pieces of location-plates (5) respectively with shell Form inlet plenum and discharge chamber between body bottom, top, the inlet plenum by the air-flow perforation that is placed on shell body inwall every Plate (3) is divided into the first expansion chamber (2) and the first pressure stabilizing cavity (4), and the discharge chamber is worn by the outlet being placed on shell body inwall Hole dividing plate (9) is divided into the second expansion chamber (8) and the second pressure stabilizing cavity (10), and outlet Perforated clapboard (9) upper end is provided with and perforated out Tracheae (11), perforation escape pipe (11) top connect with gas outlet (12).
- 2. a kind of purifying muffler for being used for 1100 single cylinder diesels according to claim 1, it is characterised in that described outer Housing is divided into upper shell (13) and lower house (14), and sealing welding is fixed between upper shell (13) and lower house (14).
- A kind of 3. purifying muffler for being used for 1100 single cylinder diesels according to claim 1, it is characterised in that the oxygen Change catalyst carrier (6) periphery to be wrapped up by tubbiness metal-back, the tubbiness metal-back periphery is wrapped up by asbestos heat-insulation layer (7).
- A kind of 4. purifying muffler for being used for 1100 single cylinder diesels according to claim 1, it is characterised in that the gas Perforation (15) is equipped with stream Perforated clapboard (3) and outlet Perforated clapboard (9).
- 5. a kind of purifying muffler for being used for 1100 single cylinder diesels according to claim 1, it is characterised in that described to wear Hole escape pipe (11) tube wall is provided with hole, and escape pipe (11) lower end sealing of perforating.
- A kind of 6. purifying muffler for being used for 1100 single cylinder diesels according to claim 1, it is characterised in that the gas The distance for flowing Perforated clapboard (3) to oxidation catalyst carrier (6) lower surface is 25mm.
- A kind of 7. purifying muffler for being used for 1100 single cylinder diesels according to claim 2, it is characterised in that the gas The distance for flowing Perforated clapboard (3) to lower house (14) bottom end face is 18mm.
- 8. a kind of purifying muffler for being used for 1100 single cylinder diesels according to claim 4, it is characterised in that described to wear Hole (15) it is uniform and it is regular be distributed on the center of circle and several concentric circles, and a diameter of 6mm of (15) of perforating.
- A kind of 9. purifying muffler for being used for 1100 single cylinder diesels according to claim 1, it is characterised in that the gas Flow the gross area of the perforation (15) on Perforated clapboard (3) for 1.5 times of air inlet (1) area and more than.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720783659.8U CN206972339U (en) | 2017-06-30 | 2017-06-30 | A kind of purifying muffler for being used for 1100 single cylinder diesels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720783659.8U CN206972339U (en) | 2017-06-30 | 2017-06-30 | A kind of purifying muffler for being used for 1100 single cylinder diesels |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206972339U true CN206972339U (en) | 2018-02-06 |
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ID=61406832
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720783659.8U Expired - Fee Related CN206972339U (en) | 2017-06-30 | 2017-06-30 | A kind of purifying muffler for being used for 1100 single cylinder diesels |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206972339U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110017266A (en) * | 2019-04-04 | 2019-07-16 | 瑞安市乐登汽车部件有限公司 | Pneumatic silencer |
| CN110685781A (en) * | 2019-11-14 | 2020-01-14 | 清华大学苏州汽车研究院（吴江） | Tail gas treatment device |
-
2017
- 2017-06-30 CN CN201720783659.8U patent/CN206972339U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110017266A (en) * | 2019-04-04 | 2019-07-16 | 瑞安市乐登汽车部件有限公司 | Pneumatic silencer |
| CN110017266B (en) * | 2019-04-04 | 2024-03-22 | 瑞安市乐登汽车部件有限公司 | Pneumatic muffler |
| CN110685781A (en) * | 2019-11-14 | 2020-01-14 | 清华大学苏州汽车研究院（吴江） | Tail gas treatment device |
| CN110685781B (en) * | 2019-11-14 | 2024-05-14 | 清华大学 | Tail gas treatment device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180206 Termination date: 20210630 |
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| CF01 | Termination of patent right due to non-payment of annual fee |