CN102748115A - Large arc diffuser - Google Patents
Large arc diffuser Download PDFInfo
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- CN102748115A CN102748115A CN2012101949749A CN201210194974A CN102748115A CN 102748115 A CN102748115 A CN 102748115A CN 2012101949749 A CN2012101949749 A CN 2012101949749A CN 201210194974 A CN201210194974 A CN 201210194974A CN 102748115 A CN102748115 A CN 102748115A
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Abstract
The invention discloses a large arc diffuser which comprises a rotation body, a large flange and a small flange. An inner cavity outline of the rotation body is formed by connecting a large arc section, a line section and a small arc section in smooth mode. The arc length of the large arc section is 78.5mm, the length of the line section is 49.2mm, and the arc length of the small arc section is 13.5mm. A diffuser taper angle formed at the smooth connection position of the large arc section and the line section is 70 degrees, the linear length of a connection section of the large arc section and the small flange is 8.6mm, the linear length of a connection section of the small arc section and the large flange is 6.8mm, and the height of an inner cavity of the rotation body is 108.5. The diffuser can reduce flow separation in the diffuser, avoids backflow at the front end of a back processor carrier, ensures even inflow at the front end of the back processor carrier, obtains good flow characteristics, improves flow speed distribution in a back processor accordingly, improves back processor conversion efficiency and reduces pressure loss.
Description
Technical field
The invention belongs to the Structure of Internal-Combustion Engine technology, be specifically related to a kind of motor preprocessor Diffuser.
Background technique
The motor preprocessor is a kind of engine exhaust gas processing unit, and preprocessor generally is made up of front end Diffuser, catalyst carrier and rear end.The Diffuser of processor front end links to each other with the engine exhaust pipe house steward, and the baffler of rear end and automobile joins.When motor exhaust gets into preprocessor, at first get into Diffuser, the diffusion back gets into catalyst carrier and reacts with it in Diffuser, discharges from the rear end at last.Its working principle be motor exhaust during through preprocessor and the catalyzer in the preprocessor react the final tail gas that satisfies emission regulation demands that generates.Along with the increasingly stringent of vehicular emission rules with under the pressure of the market pressure that reduces cost; Each big motor manufacturing enterprise all will improve the performance of motor preprocessor and one of improve as important techniques; Manage structure is optimized design, improve its working life.The performance of preprocessor depends primarily on flow characteristic; Like the inhomogeneous utilization ratio that then directly influences catalyzer on the carrier of velocity flow profile; Also can cause the airspeed and the temperature in carrier center zone too high; The deterioration of aggravation catalyzer, the uniformity of velocity distribution also has bigger influence to the light off characteristics and the thermal response of preprocessor in addition.Simultaneously, the preprocessor flowing pressure loss reduces the output power of motor than senior general, and the mobile performance that therefore improves preprocessor is to improve the key factor of its transformation efficiency and durability.Preprocessor Diffuser moulding proposed by the invention can effectively improve the inner velocity flow profile of preprocessor, reduces the pressure loss.
Summary of the invention
The present invention seeks to propose a kind of processor Diffuser moulding of great circle camber, this Diffuser can effectively improve the inner velocity flow profile of preprocessor.
Below in conjunction with accompanying drawing principle of the present invention and structure are explained.Great circle camber Diffuser comprises solid of rotation and large and small flange plate, and the inner chamber profile line of solid of rotation is by great circle segmental arc, straightway and little arc section is smooth connects and composes.Wherein great circle segmental arc arc length is 78.5mm; Straightway is 49.2mm; Roundlet segmental arc arc length is 13.5mm; The Diffuser cone angle that the level and smooth boundary of great circle segmental arc and straightway forms is 70 °, and the straight length of great circle segmental arc and small flange plate linkage section is 8.6mm, and little arc section is 6.8mm with the straight length of big flange plate linkage section, and the inner chamber height of solid of rotation is 108.5.
It is in order to reduce the inner flow separation of Diffuser that the diffuser inlet is designed to orthodrome; Avoid the backflow phenomenon of preprocessor carrier front end; Preprocessor carrier front end place is become a mandarin evenly; Obtain flow characteristic preferably, thereby improve the inner velocity flow profile of preprocessor, improve the preprocessor transformation efficiency and reduce the pressure loss.Improve the cost that the preprocessor transformation efficiency can effectively reduce preprocessor, and the pressure loss of minimizing preprocessor can reduce the back pressure of motor, improve fuel economy.
Characteristics of the present invention and beneficial effect are; Can reduce the inner flow separation of Diffuser; Avoid the backflow phenomenon of preprocessor carrier front end, preprocessor carrier front end place is become a mandarin evenly, obtain flow characteristic preferably; Thereby improve the inner velocity flow profile of preprocessor, improve the preprocessor transformation efficiency and reduce the pressure loss.Improve the cost that the preprocessor transformation efficiency can effectively reduce preprocessor, and the pressure loss of minimizing preprocessor can reduce the back pressure of motor, improve fuel economy.
Description of drawings
Fig. 1 is a theory structure sectional view of the present invention.
Fig. 2 is a schematic appearance of the present invention.
Embodiment
Below in conjunction with accompanying drawing and through practical implementation structural principle of the present invention is done further explanation, but the content that the present invention is contained is not limited to following embodiment.
The structure of great circle camber Diffuser is, the inner chamber profile line of solid of rotation 1 is by great circle segmental arc, straightway and little arc section is smooth connects and composes.Great circle segmental arc arc length R1=78.5mm wherein; Straightway 2 is 49.2mm; Roundlet segmental arc arc length R2=13.5mm; The Diffuser cone angle that the level and smooth boundary of great circle segmental arc and straightway forms is α=70 °; The straight length of great circle segmental arc and small flange plate 3 linkage sections 4 is 8.6mm; Little arc section is 6.8mm with the straight length of big flange plate 5 linkage sections 6, and the inner chamber height of solid of rotation is h=108.5 (like Fig. 1).The entry end diameter of phi 1=70mm of solid of rotation; Outlet end diameter of phi 2=160mm, small flange plate and big flange plate have the bolt hole (like Fig. 1, Fig. 2) of 4 Φ 9mm respectively.
The present invention has carried out experimental verification on 4102-CE4C state four diesel engines, small flange plate is connected to the engine exhaust house steward; Big flange plate is connected to the catalyst carrier of preprocessor.The evidence preprocessor transformation efficiency and the pressure loss have obtained effective improvement.
Concrete leading indicator such as following table.
Claims (2)
1. great circle camber Diffuser comprises solid of rotation and large and small flange plate, and the inner chamber profile line that it is characterized in that solid of rotation (1) is by great circle segmental arc, straightway and little arc section is smooth connects and composes, and wherein great circle segmental arc arc length is 78.5mm; Straightway (2) is 49.2mm; Roundlet segmental arc arc length is 13.5mm; The Diffuser cone angle that the level and smooth boundary of great circle segmental arc and straightway forms is 70 °; The straight length of great circle segmental arc and small flange plate (3) linkage section (4) is 8.6mm; Little arc section is 6.8mm with the straight length of big flange plate (5) linkage section (6), and the inner chamber height of solid of rotation is 108.5.
2. according to the described great circle camber of claim 1 Diffuser, the entry end diameter that it is characterized in that said solid of rotation (1) is 70mm; The outlet end diameter is 160mm, and said small flange plate (3) and big flange plate (5) have 4 bolts respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101949749A CN102748115A (en) | 2012-06-13 | 2012-06-13 | Large arc diffuser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101949749A CN102748115A (en) | 2012-06-13 | 2012-06-13 | Large arc diffuser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102748115A true CN102748115A (en) | 2012-10-24 |
Family
ID=47028559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101949749A Pending CN102748115A (en) | 2012-06-13 | 2012-06-13 | Large arc diffuser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102748115A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021221968A1 (en) * | 2020-04-27 | 2021-11-04 | Rheem Manufacturing Company | Frustoconical combustion chamber for a fluid heating device and methods for making the same |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB675222A (en) * | 1949-09-29 | 1952-07-09 | Alexander Wright | Improvements in exhaust gas silencers for internal-combustion engines |
| DE3626729A1 (en) * | 1986-08-07 | 1988-02-18 | Leistritz Ag | Exhaust-purifying device for motor vehicles |
| JPH1061431A (en) * | 1996-08-26 | 1998-03-03 | Calsonic Corp | Catalyst converter for vehicle exhaust system |
| EP0921282A2 (en) * | 1997-12-03 | 1999-06-09 | Ford Global Technologies, Inc. | Exhaust treatment device for automotive vehicle |
| JP2006150195A (en) * | 2004-11-26 | 2006-06-15 | Calsonic Kansei Corp | Catalytic converter |
| DE102006038204A1 (en) * | 2006-08-16 | 2008-02-21 | Faurecia Abgastechnik Gmbh | Input funnel for exhaust treatment device for motor vehicle, has diffuser arranged within input funnel, which extends away from inflow opening into extended range of input funnel |
-
2012
- 2012-06-13 CN CN2012101949749A patent/CN102748115A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB675222A (en) * | 1949-09-29 | 1952-07-09 | Alexander Wright | Improvements in exhaust gas silencers for internal-combustion engines |
| DE3626729A1 (en) * | 1986-08-07 | 1988-02-18 | Leistritz Ag | Exhaust-purifying device for motor vehicles |
| JPH1061431A (en) * | 1996-08-26 | 1998-03-03 | Calsonic Corp | Catalyst converter for vehicle exhaust system |
| EP0921282A2 (en) * | 1997-12-03 | 1999-06-09 | Ford Global Technologies, Inc. | Exhaust treatment device for automotive vehicle |
| JP2006150195A (en) * | 2004-11-26 | 2006-06-15 | Calsonic Kansei Corp | Catalytic converter |
| DE102006038204A1 (en) * | 2006-08-16 | 2008-02-21 | Faurecia Abgastechnik Gmbh | Input funnel for exhaust treatment device for motor vehicle, has diffuser arranged within input funnel, which extends away from inflow opening into extended range of input funnel |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021221968A1 (en) * | 2020-04-27 | 2021-11-04 | Rheem Manufacturing Company | Frustoconical combustion chamber for a fluid heating device and methods for making the same |
| US11236902B2 (en) | 2020-04-27 | 2022-02-01 | Rheem Manufacturing Company | Frustoconical combustion chamber for a fluid heating device and methods for making the same |
| US11906159B2 (en) | 2020-04-27 | 2024-02-20 | Rheem Manufacturing Company | Frustoconical combustion chamber for a fluid heating device and methods for making the same |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121024 |