CN114060128A - Air inlet end cone assembly and tail gas aftertreatment package - Google Patents
Air inlet end cone assembly and tail gas aftertreatment package Download PDFInfo
- Publication number
- CN114060128A CN114060128A CN202111460033.0A CN202111460033A CN114060128A CN 114060128 A CN114060128 A CN 114060128A CN 202111460033 A CN202111460033 A CN 202111460033A CN 114060128 A CN114060128 A CN 114060128A
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- Prior art keywords
- inlet
- aftertreatment
- cavity
- housing
- inlet cavity
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- 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
- F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
An inlet end cone assembly includes a first housing and a second housing. The first housing includes a first base and a first inlet. The second housing includes a second base and a second inlet. The first base includes a first annular opening and the second base includes a second annular opening, the first annular opening communicating with the second annular opening to form a dispensing chamber. The first inlet portion is in butt joint with the second inlet portion to form an inlet cavity. The inlet end cone assembly also includes a first baffle and a second baffle. The first baffle divides the inlet cavity into a first inlet cavity and a second inlet cavity. The first guide plate comprises a first blocking part positioned in the inlet cavity and a first extending part used for guiding tail gas entering the first air inlet cavity to the low-speed area. The invention also discloses an exhaust aftertreatment package with the gas inlet end cone assembly.
Description
Technical Field
The invention relates to an air inlet end cone assembly and a tail gas aftertreatment package, and belongs to the technical field of engine tail gas aftertreatment.
Background
Existing exhaust aftertreatment packages typically include an inlet end cone assembly and an aftertreatment carrier assembly coupled to the inlet end cone assembly. In some cases, the air inlet direction of the air inlet end cone assembly is perpendicular to the axial direction of the after-treatment carrier, which causes the exhaust gas entering from the air inlet end cone assembly to rapidly flow downstream under the exhaust pressure, so that a low-speed area is formed at a position close to the air inlet end cone assembly, which affects the distribution uniformity of the exhaust gas on the inlet end face of the after-treatment carrier assembly, and therefore affects the treatment effect of the after-treatment carrier assembly on the exhaust gas purification.
Disclosure of Invention
The invention aims to provide an air inlet end cone assembly capable of guiding exhaust to a low-speed area and an exhaust aftertreatment package.
In order to achieve the purpose, the invention adopts the following technical scheme: an air inlet end cone assembly comprising a first housing and a second housing mated with the first housing; the first housing comprises a first base and a first inlet portion protruding out of the first base, the second housing comprises a second base and a second inlet portion protruding out of the second base, the first base comprises a first annular opening, the second base comprises a second annular opening, the first annular opening and the second annular opening are communicated to form a distribution cavity, the first inlet portion and the second inlet portion are butted to form an inlet cavity, and the inlet cavity is communicated with the distribution cavity; the inlet end cone assembly further comprises a first baffle plate at least partially located in the inlet cavity and a second baffle plate at least partially located in the distribution cavity, the first baffle plate divides the inlet cavity into a first inlet cavity and a second inlet cavity, the first baffle plate comprises a first blocking portion located in the inlet cavity and a first extending portion extending from the first blocking portion, and the first extending portion extends partially into the low-speed region of the distribution cavity close to the inlet cavity to guide the exhaust gas entering the first inlet cavity to the low-speed region; the second guide plate is used for guiding tail gas entering the second air inlet cavity to a non-low-speed area of the distribution cavity far away from the inlet cavity.
As a further improved technical solution of the present invention, the first baffle is welded to the first base, and the first extension includes a deflecting portion that is bent to a side away from the second housing.
As a further improved technical scheme of the invention, the first blocking part comprises a plurality of reinforcing ribs arranged at intervals.
As a further improved technical solution of the present invention, the second baffle is welded to the second base, and the second baffle includes a second blocking portion, a second extending portion extending from one side of the second blocking portion, and a third extending portion extending from the other opposite side of the second blocking portion.
As a further improved technical solution of the present invention, the second blocking portion is located downstream of the second air intake cavity; the second blocking part is arranged in an inclined mode so as to guide tail gas entering the second gas inlet cavity to the non-low-speed area.
As a further improved technical solution of the present invention, the second blocking portion includes a notch exposed to the first annular opening, and the notch is used for allowing a part of the exhaust gas entering the second intake cavity to pass through.
As a further improved technical solution of the present invention, the first housing and the second housing are fixed by welding.
The invention also discloses an exhaust gas post-treatment package, which comprises a post-treatment component and the air inlet end cone component, wherein the post-treatment component comprises a post-treatment shell and a post-treatment carrier packaged in the post-treatment shell, the post-treatment shell is fixed on the first shell to enable the distribution cavity to be communicated with the inlet end face of the post-treatment carrier, and the first guide plate and the inlet end face of the post-treatment carrier are spaced at a certain distance along the axial direction of the post-treatment carrier.
As a further improved technical solution of the present invention, in the axial direction of the aftertreatment carrier, the first baffle is located between the aftertreatment carrier and the second baffle.
As a further improved technical solution of the present invention, the extending direction of the inlet cavity is perpendicular to the axial direction of the aftertreatment carrier; the aftertreatment carrier is a diesel oxidation catalyst carrier.
Compared with the prior art, the first guide plate divides the inlet cavity into a first inlet cavity and a second inlet cavity, the first guide plate comprises a first blocking part located in the inlet cavity and a first extending part extending from the first blocking part, and the first extending part partially extends into the low-speed area of the distribution cavity close to the inlet cavity to guide tail gas entering the first inlet cavity to the low-speed area. So set up, improved the distribution homogeneity of tail gas on distribution cavity cross section.
Drawings
FIG. 1 is a schematic perspective view of an exhaust aftertreatment package of the present invention in the illustrated embodiment.
Fig. 2 is an exploded perspective view of fig. 1.
Fig. 3 is a perspective view of the first housing and the first baffle of fig. 2 assembled together.
Fig. 4 is an exploded perspective view of the first housing and the first baffle of fig. 2.
Fig. 5 is an exploded perspective view of the second housing and second baffle of fig. 2.
Fig. 6 is a schematic sectional view taken along line a-a in fig. 1.
Fig. 7 is an exploded view of fig. 6.
Fig. 8 is a partially enlarged view of circled portion B in fig. 6.
Detailed Description
The following detailed description of the embodiments of the invention will be described in conjunction with the accompanying drawings, in which, if there are several embodiments, the features of these embodiments can be combined with each other without conflict. When the description refers to the accompanying drawings, like numbers or symbols in different drawings represent the same or similar elements unless otherwise specified. The statements made in the following exemplary embodiments do not represent all embodiments of the present invention, but rather they are merely examples of products consistent with the present invention as recited in the claims of the present invention.
The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention. It should be understood that the use of terms such as "first," "second," and the like, in the description and in the claims of the present invention do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another.
Referring to fig. 1 to 8, an exhaust aftertreatment package 100 includes an aftertreatment component 1 and an inlet end cone component 2. The aftertreatment assembly 1 includes an aftertreatment housing 11 and an aftertreatment carrier 12 encapsulated in the aftertreatment housing 11. The aftertreatment carrier 12 is enclosed in the aftertreatment housing 11 by a gasket 13. In one embodiment of the invention, the aftertreatment support 12 is a diesel oxidation catalyst support (DOC).
The inlet end cone assembly 2 includes a first housing 21 and a second housing 22 that mates with the first housing 21. The first housing 21 and the second housing 22 are fixed by welding. The first housing 21 includes a first base 211 and a first inlet 212 protruding from the first base 211. The second housing 22 includes a second base 221 and a second inlet 222 protruding from the second base 221. The first base 211 includes a first annular opening 2110 and the second base 221 includes a second annular opening 2210. The first annular opening 2110 communicates with the second annular opening 2210 to form the dispensing chamber 230. The first inlet portion 212 interfaces with the second inlet portion 222 to form an inlet cavity 240. The inlet chamber 240 communicates with the distribution chamber 230. The inlet end cone assembly 2 further includes a first baffle 25 at least partially positioned in the inlet cavity 240 and a second baffle 26 at least partially positioned in the distribution cavity 230. The first baffle 25 separates the inlet cavity 240 into a first intake cavity 2401 and a second intake cavity 2402.
The first baffle 25 includes a first blocking portion 251 located in the inlet cavity 240 and a first extension portion 252 extending from the first blocking portion 251. The first extension 252 partially extends into the low velocity region 2301 of the distribution chamber 230 near the inlet chamber 240 to direct the exhaust entering the first inlet chamber 2401 to the low velocity region 2301. The first baffle 25 is welded to the first base 211, and the first extension 252 includes a deflection portion 253 bent to a side away from the second housing 22. The first blocking portion 251 includes a plurality of reinforcing ribs 254 disposed at intervals to improve the structural strength of the first baffle 25.
The second baffle 26 is configured to direct exhaust entering the second inlet chamber 2402 to the non-low velocity region 2302 of the distribution chamber 230 away from the inlet chamber 240. The second baffle 26 is welded to the second base 221, and the second baffle 26 includes a second blocking portion 261, a second extension portion 262 extending from one side of the second blocking portion 261, and a third extension portion 263 extending from the other opposite side of the second blocking portion 261. The second blocking portion 261 is located downstream of the second intake cavity 2402; the second blocking portion 261 is disposed in an inclined manner to guide the exhaust gas entering the second intake cavity 2402 to the non-low velocity region 2302. The second blocking portion 261 includes a gap 2611 exposed to the first annular opening 2110, and the gap 2611 is used for allowing a part of the exhaust gas entering the second intake cavity 2402 to pass through.
In the axial direction C-C of the aftertreatment carrier 12, the first baffle 25 is located between the aftertreatment carrier 12 and the second baffle 26. The direction of extension D-D of the inlet chamber 240 is perpendicular to the axial direction C-C of the aftertreatment carrier 12. The aftertreatment housing 11 is fixed to the first housing 21 so that the distribution chamber 230 communicates with the inlet end surface 121 of the aftertreatment carrier 12, and the first baffle 25 and the inlet end surface 121 of the aftertreatment carrier 12 are spaced apart from each other by a predetermined distance in the axial direction C-C of the aftertreatment carrier 12. This arrangement provides a certain flow space for the exhaust gas before flowing through the inlet end face 121 of the aftertreatment carrier 12, thereby facilitating an improved uniformity of gas flow distribution.
It is noted that the terms low velocity region 2301 and non-low velocity region 2302 as used in the present invention are intended to indicate the relative flow rates of the exhaust gases as they flow through this region. Referring to fig. 6, it can be understood by those skilled in the art that if the first baffle 25 and the second baffle 26 are not provided, after the exhaust gas flows from the inlet chamber 240, most of the exhaust gas will be flushed down into the distribution chamber 230 under the action of the exhaust pressure. The exhaust gas at the bottom of the distribution chamber 230 is much larger than the exhaust gas at the top of the distribution chamber 230, resulting in a very low exhaust gas flow at the top of the distribution chamber 230, which affects the utilization of the aftertreatment carriers 12 at the corresponding position. In the invention, the first guide plate 25 is arranged to forcedly divide the tail gas into two paths, wherein one path is guided to the low-speed region 2301, so that the utilization rate of the post-treatment carrier 12 corresponding to the position is improved; and the other path of the tail gas is subjected to secondary mixing under the action of the second flow guide plate 26, so that the tail gas can flow through the aftertreatment carrier 12 more uniformly. Those skilled in the art will appreciate that by adjusting the angle of inclination of the first baffle 25, the distribution of the airflow can be adjusted; by adjusting the position of the second baffle 26, the mixing ratio of the two air flows can be controlled.
The above embodiments are only for illustrating the invention and not for limiting the technical solutions described in the invention, and the understanding of the present specification should be based on the technical personnel in the field, and although the present specification has described the invention in detail with reference to the above embodiments, the technical personnel in the field should understand that the technical personnel in the field can still make modifications or equivalent substitutions to the present invention, and all the technical solutions and modifications thereof without departing from the spirit and scope of the present invention should be covered in the claims of the present invention.
Claims (10)
1. An air inlet end cone assembly comprising a first housing and a second housing mated with the first housing; the method is characterized in that: the first housing comprises a first base and a first inlet portion protruding out of the first base, the second housing comprises a second base and a second inlet portion protruding out of the second base, the first base comprises a first annular opening, the second base comprises a second annular opening, the first annular opening and the second annular opening are communicated to form a distribution cavity, the first inlet portion and the second inlet portion are butted to form an inlet cavity, and the inlet cavity is communicated with the distribution cavity; the inlet end cone assembly further comprises a first baffle plate at least partially located in the inlet cavity and a second baffle plate at least partially located in the distribution cavity, the first baffle plate divides the inlet cavity into a first inlet cavity and a second inlet cavity, the first baffle plate comprises a first blocking portion located in the inlet cavity and a first extending portion extending from the first blocking portion, and the first extending portion extends partially into the low-speed region of the distribution cavity close to the inlet cavity to guide the exhaust gas entering the first inlet cavity to the low-speed region; the second guide plate is used for guiding tail gas entering the second air inlet cavity to a non-low-speed area of the distribution cavity far away from the inlet cavity.
2. The air intake end cone assembly of claim 1, wherein: the first baffle is welded to the first base, and the first extension part comprises a deflection part bent to one side far away from the second shell.
3. The air intake end cone assembly of claim 1, wherein: the first blocking part comprises a plurality of reinforcing ribs arranged at intervals.
4. The air intake end cone assembly of claim 1, wherein: the second baffle is welded to the second base, and the second baffle includes a second blocking portion, a second extension portion extending from one side of the second blocking portion, and a third extension portion extending from the other opposite side of the second blocking portion.
5. The air intake end cone assembly of claim 4, wherein: the second blocking part is positioned at the downstream of the second air inlet cavity; the second blocking part is arranged in an inclined mode so as to guide tail gas entering the second gas inlet cavity to the non-low-speed area.
6. The air intake end cone assembly of claim 5, wherein: the second blocking part comprises a gap exposed to the first annular opening, and the gap is used for allowing part of tail gas entering the second air inlet cavity to pass through.
7. The air intake end cone assembly of claim 1, wherein: the first shell and the second shell are fixed in a welding mode.
8. An exhaust aftertreatment package, its characterized in that: the air inlet end cone assembly of any one of claims 1 to 7 and an aftertreatment assembly, the aftertreatment assembly comprising an aftertreatment housing and an aftertreatment carrier encapsulated within the aftertreatment housing, the aftertreatment housing being secured to the first housing such that the distribution chamber is in communication with an inlet end face of the aftertreatment carrier, the first baffle plate being spaced from the inlet end face of the aftertreatment carrier by a distance in an axial direction of the aftertreatment carrier.
9. The exhaust aftertreatment package of claim 8, wherein: the first baffle is located between the aftertreatment carrier and the second baffle in an axial direction of the aftertreatment carrier.
10. The exhaust aftertreatment package of claim 8, wherein: the extension direction of the inlet cavity is perpendicular to the axial direction of the aftertreatment carrier; the aftertreatment carrier is a diesel oxidation catalyst carrier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111460033.0A CN114060128A (en) | 2021-12-02 | 2021-12-02 | Air inlet end cone assembly and tail gas aftertreatment package |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111460033.0A CN114060128A (en) | 2021-12-02 | 2021-12-02 | Air inlet end cone assembly and tail gas aftertreatment package |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114060128A true CN114060128A (en) | 2022-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111460033.0A Pending CN114060128A (en) | 2021-12-02 | 2021-12-02 | Air inlet end cone assembly and tail gas aftertreatment package |
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| Country | Link |
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| CN (1) | CN114060128A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114961941A (en) * | 2022-05-23 | 2022-08-30 | 一汽解放汽车有限公司 | Tail gas treatment device and vehicle |
-
2021
- 2021-12-02 CN CN202111460033.0A patent/CN114060128A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114961941A (en) * | 2022-05-23 | 2022-08-30 | 一汽解放汽车有限公司 | Tail gas treatment device and vehicle |
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