CN114876677A - EGR cooler inlet tube butt joint subassembly - Google Patents
EGR cooler inlet tube butt joint subassembly Download PDFInfo
- Publication number
- CN114876677A CN114876677A CN202210295035.7A CN202210295035A CN114876677A CN 114876677 A CN114876677 A CN 114876677A CN 202210295035 A CN202210295035 A CN 202210295035A CN 114876677 A CN114876677 A CN 114876677A
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- China
- Prior art keywords
- butt joint
- joint
- pipe
- wall
- egr cooler
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/23—Layout, e.g. schematics
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/23—Layout, e.g. schematics
- F02M26/28—Layout, e.g. schematics with liquid-cooled heat exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
- F02M26/32—Liquid-cooled heat exchangers
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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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
The application discloses EGR cooler inlet tube butt joint subassembly can improve the flow range of the leading-in cooler of coolant liquid to improve the cooling effect. The EGR cooler inlet tube butt joint subassembly in this application includes: the pipe joint comprises a first joint, a butt joint pipe and a second joint; the butt joint pipe comprises a first butt joint part and a second butt joint part; the first joint is sleeved outside a first butt joint part of the butt joint pipe and is fixedly connected with the butt joint pipe in a sealing manner so as to introduce cooling liquid into the butt joint pipe; the second joint is sleeved outside a second butt joint part of the butt joint pipe and is fixedly connected with the butt joint pipe in a sealing manner so as to introduce cooling liquid into the cooler; the inner wall of the second butt joint part of the butt joint pipe inclines outwards towards the direction far away from the axis of the second joint.
Description
Technical Field
The application relates to cooler equipment field especially relates to an EGR cooler inlet tube butt joint subassembly.
Background
Exhaust Gas Recirculation (EGR) is a technique and method for reducing nitrogen oxides in Exhaust emissions of an engine, in which an EGR cooler is required to cool the Exhaust emitted from the engine, and the cooled Exhaust is returned to an intake pipe and Re-enters the engine cylinder together with fresh air mixture.
In the prior art, the EGR cooler generally introduces a coolant with a low temperature through a water inlet pipe arranged on the outer side, and cools the backflow high-temperature gas in the cooler core.
However, due to the limitation of the factors such as the size of the butt joint position of the water inlet pipe and the cooler, the flowing range of the cooling liquid in the water inlet pipe entering the cooler shell is possibly small, so that the contact effect of the cooling liquid with low temperature and the cores on the two sides in the cooler shell is poor, the cooling effect of the gas with high temperature in the cores is poor, and the damage of equipment caused by the over-high temperature dry combustion thermal expansion in the cores is possible.
Disclosure of Invention
In order to solve the above technical problem, the present application provides a docking assembly for an inlet pipe of an EGR cooler, which can improve the flowing range of a coolant introduced into the cooler, thereby improving the cooling effect, and specifically refers to the following examples.
The application provides an EGR cooler inlet tube butt joint subassembly includes: the pipe joint comprises a first joint, a butt joint pipe and a second joint; the butt joint pipe comprises a first butt joint part and a second butt joint part;
the first joint is sleeved outside the first butt joint part of the butt joint pipe and is fixedly connected with the butt joint pipe in a sealing manner so as to lead cooling liquid into the butt joint pipe from a water inlet pipe;
the second joint is sleeved outside a second butt joint part of the butt joint pipe and is fixedly connected with the butt joint pipe in a sealing manner so as to introduce cooling liquid into the cooler;
an inner wall of a second butting portion of the butt joint pipe, which is close to the second joint, is inclined outward toward a direction away from an axis of the second joint.
Optionally, the cross-sectional shape of the inner wall of the first docking portion corresponding to the first docking portion is circular, and the cross-sectional shape of the inner wall of the second docking portion corresponding to the second docking portion is square.
Optionally, the butt-joint pipe is an elbow.
Optionally, an axis of the first docking portion and an axis of the second docking portion are perpendicular to each other.
Optionally, an inclination angle of an inner wall of the second docking portion gradually increases toward the second joint.
Optionally, the angle of inclination of the inner wall of the second docking portion is less than 90 °.
Optionally, a first sealing ring is arranged outside the first joint to seal a gap at a joint of the first joint and the water inlet pipe.
Optionally, the inner wall corresponding cross-sectional shape of the first joint matches the inner wall corresponding cross-sectional shape of the first butt joint portion.
Optionally, the corresponding cross-sectional shape of the inner wall of the second joint matches the corresponding cross-sectional shape of the inner wall of the second docking portion.
Optionally, a second sealing ring is arranged outside the second joint to seal a gap at the joint of the second joint and the cooler.
According to the technical scheme, the method has the following advantages:
the first joint is sleeved outside the first butt joint part of the butt joint pipe and is fixedly connected with the butt joint pipe in a sealing way so as to lead cooling liquid into the butt joint pipe from the water inlet pipe; the second joint is sleeved outside the second butt joint part of the butt joint pipe and is fixedly connected with the butt joint pipe in a sealing way so as to lead cooling liquid into the cooler; the inner wall of the second butt joint portion of the butt joint pipe is inclined outward corresponding to the axial direction of the second joint. Through the inclined inner wall of the second butt joint part of the butt joint pipe, the cooling liquid in the butt joint pipe can be guided to flow into the cooler along the inclined angle, so that the flowing range of the cooling liquid in the cooler is enlarged, the contact effect of the cooling liquid and the high-temperature core is improved, and the cooling efficiency of the cooler is improved.
Drawings
In order to more clearly illustrate the technical solutions in the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a front view of a structural butt joint assembly for an inlet tube of an EGR cooler of the present application;
FIG. 2 is a top view of the EGR cooler inlet tube docking assembly according to the present application;
fig. 3 is a left side view of the structure of the EGR cooler inlet pipe docking assembly in the present application.
Detailed Description
In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used only for explaining relative positional relationships between the respective members or components, and do not particularly limit specific mounting orientations of the respective members or components.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In addition, the structures, the proportions, the sizes, and the like, which are illustrated in the accompanying drawings and described in the present application, are intended to be considered illustrative and not restrictive, and therefore, not limiting, since those skilled in the art will understand and read the present application, it is understood that any modifications of the structures, changes in the proportions, or adjustments in the sizes, which are not necessarily essential to the practice of the present application, are intended to be within the scope of the present disclosure without affecting the efficacy and attainment of the same.
The application provides an EGR cooler inlet tube butt joint subassembly can improve the flow range of the leading-in cooler of coolant liquid to improve the cooling effect.
EGR exhaust gas recirculation is a method and technology for returning part of exhaust gas discharged from an engine to an intake pipe and re-entering cylinders together with fresh air-fuel mixture. Since the exhaust gas contains a large amount of polyatomic gas such as carbon dioxide, which cannot be combusted but absorbs a large amount of heat due to its high specific heat capacity, the maximum combustion temperature of the air-fuel mixture in the cylinder is lowered, thereby reducing the amount of nitrogen oxides generated.
In which an EGR cooler is required to cool the recirculated high-temperature exhaust gas, and if the high-temperature exhaust gas is not cooled, the hot recirculated exhaust gas heats the intake air, which causes a great increase in the in-cylinder combustion temperature and pressure, counteracts the effect of the amount of nitrogen oxides generated, and in a serious case, also causes structural damage to the engine body, and therefore, it is necessary to cool the high-temperature recirculated exhaust gas by the EGR cooler. The cooled object of an EGR cooler is recirculated exhaust gas, which is generally transported by a high temperature core, which is high in temperature and requires a high temperature core heat exchanger to achieve a large heat transfer with a small heat exchange area.
Referring to fig. 1 and 2, an EGR cooler inlet pipe docking assembly according to the present application includes: a first joint 1, a butt joint pipe 2 and a second joint 3; the butt joint pipe 2 includes a first butt joint portion and a second butt joint portion;
the first joint 1 is sleeved outside the first butt joint part of the butt joint pipe 2 and is fixedly connected with the butt joint pipe 2 in a sealing way so as to lead cooling liquid into the butt joint pipe 2 from the water inlet pipe;
the second joint 3 is sleeved outside the second butt joint part of the butt joint pipe 2 and is fixedly connected with the butt joint pipe 2 in a sealing way so as to introduce cooling liquid into the cooler;
an inner wall of the second butting portion of the butt joint pipe 2 close to the second joint 3 is inclined outward toward a direction away from the axis of the second joint 3.
In this application, leading-in coolant liquid in-process in to the cooler casing, be full of this coolant liquid in the drain passageway that the inlet tube corresponds, and in leading-in cooler casing along butt joint pipe 2, because the second butt joint portion inner wall of butt joint pipe 2 is corresponding to the axis direction outside slope that the second connects 3, through the slope inner wall of this second butt joint portion to pipe 2, can guide in the coolant liquid in butt joint pipe 2 flows into the cooler along this inclination, thereby increase the flow range of coolant liquid in the cooler casing, improve the contact effect of coolant liquid and high temperature core, thereby improve the cooling efficiency of cooler.
It can be understood that the pair of pipes 2 is located at a side position of the cooler to lead out the cooling liquid passing through the high-temperature core in the cooler housing through the water outlet pipe arranged at the other side of the cooler, the arrangement can make the flow path of the cooling liquid in the cooler housing parallel or approximately parallel with respect to the horizontal plane, and the influence of gravity on the flow path of the cooling liquid can be reduced to reduce the flow speed of the cooling liquid in the flow path, so that the time of heat transfer between the cooling liquid and the high-temperature core part in the cooler housing is prolonged, and the utilization rate of the heat transfer is improved.
It can be understood that, in order to enable each high-temperature core in the cooler housing to perform a certain degree of heat transfer with the water inlet pipe and the cooling liquid introduced by the adapter pipe 2 for temperature reduction treatment, the direction of the high-temperature exhaust gas conveyed by the core in the cooler housing is approximately parallel to the flow path of the introduced cooling liquid, so that the overall temperature reduction of the high-temperature core in the cooler housing can be improved, and the situation that the temperature of the returned exhaust gas is higher due to the weak temperature reduction effect of the local high-temperature core is reduced.
Optionally, the inner wall corresponding to the cross-sectional shape of the first docking portion is circular, and the inner wall corresponding to the cross-sectional shape of the second docking portion is square. Usually, the corresponding cross-sectional shape of the inner wall of the water inlet pipe is circular, in order to match with the corresponding cross-sectional shape of the inner wall at the joint of the water inlet pipe, the cross-sectional shape of the inner wall of the first butt joint part is also circular, and the square shape of the second butt joint part can enable the transverse length and the longitudinal length of the butt joint with the cooler to have different relative proportions, so that the second butt joint part and the second joint 3 can have longer longitudinal length and shorter transverse length.
Optionally, the interface tube 2 is a bent tube. Due to structural design problems in the equipment, the water inlet pipe is usually located at the side position of the cooler, and the bent pipe can be adapted to the relative position structure of the water inlet pipe and the cooler.
Alternatively, the axis of the first butt joint portion and the axis of the second butt joint portion are perpendicular to each other, that is, the opening directions of both sides of the butt joint pipe are perpendicular to each other, and the butt joint pipe may be a right-angle rotary pipe. When the cooling liquid flows in the butt joint pipe, the cooling liquid collides with the inner wall of the second butt joint part in the flowing direction of the first butt joint part of the butt joint pipe towards the inner wall of the second butt joint part, so that the flowing cooling liquid is subjected to acting force acting in the opposite direction, certain flowing force is also provided on the inclined inner wall above the second butt joint part, and the inclined inner wall of the second butt joint part can better guide the cooling liquid to be guided to the inner part of the cooler shell to diffuse around. It will be appreciated that the coolant flow rate in the docking pipe is generally slow and the pressure on the inner wall side of the second docking portion is generally low due to convection of the coolant with the inner wall side of the second docking portion.
Optionally, the inclination angle of the inner wall of the second docking portion gradually increases towards the second joint 3, and the gradually increasing inclination angle is improved, so that the cooling liquid can be better guided to flow into the cooler housing along the inner wall of the second docking portion, the flowing range of the cooling liquid in the cooler housing is increased, the contact effect of the cooling liquid and the high-temperature core is improved, and the cooling efficiency of the cooler is improved.
Alternatively, the inclination angle of the inner wall of the second docking portion is smaller than 90 °, that is, the inner wall of the second docking portion is inclined toward the direction side from which the cooling liquid is led out.
Optionally, a first sealing ring is arranged outside the first joint 1 to seal a gap at a joint of the first joint 1 and the water inlet pipe.
Alternatively, the corresponding cross-sectional shape of the inner wall of the first joint 1 matches the corresponding cross-sectional shape of the inner wall of the first butt joint portion.
Optionally, the corresponding cross-sectional shape of the inner wall of the second joint 3 matches the corresponding cross-sectional shape of the inner wall of the second docking portion.
Optionally, a second sealing ring is arranged outside the second joint 3 to seal a gap at the joint of the second joint 3 and the cooler.
It should be noted that the above-mentioned application contents and the specific embodiments are intended to demonstrate the practical application of the technical solutions provided in the present application, and should not be construed as limiting the scope of protection of the present application. Various modifications, equivalent substitutions, or improvements may be made by those skilled in the art within the spirit and principles of the present application. The protection scope of this application is subject to the appended claims.
Claims (10)
1. An EGR cooler inlet tube docking assembly, comprising: the pipe joint comprises a first joint, a butt joint pipe and a second joint; the butt joint pipe comprises a first butt joint part and a second butt joint part;
the first joint is sleeved outside the first butt joint part of the butt joint pipe and is fixedly connected with the butt joint pipe in a sealing manner so as to lead cooling liquid into the butt joint pipe from a water inlet pipe;
the second joint is sleeved outside a second butt joint part of the butt joint pipe and is fixedly connected with the butt joint pipe in a sealing manner so as to introduce cooling liquid into the cooler;
an inner wall of a second butting portion of the butt joint pipe, which is close to the second joint, is inclined outward toward a direction away from an axis of the second joint.
2. The EGR cooler inlet tube docking assembly of claim 1 wherein the corresponding cross-sectional shape of the inner wall of said first docking portion is circular and the corresponding cross-sectional shape of the inner wall of said second docking portion is square.
3. The EGR cooler water inlet tube docking assembly of claim 1 wherein said docking tube is an elbow.
4. The EGR cooler inlet tube docking assembly of claim 3 wherein an axis of said first docking portion is perpendicular to an axis of said second docking portion.
5. The EGR cooler inlet tube docking assembly of claim 1 wherein an angle of inclination of an inner wall of said second docking portion increases gradually toward said second joint.
6. The EGR cooler water inlet tube docking assembly of claim 5 wherein the angle of inclination of the inner wall of the second docking portion is less than 90 °.
7. The EGR cooler water inlet pipe butt joint assembly according to any one of claims 1 to 6, wherein a first sealing ring is arranged outside the first joint to seal a gap at the joint of the first joint and the water inlet pipe.
8. The EGR cooler water inlet tube docking assembly of any one of claims 1-6 wherein a corresponding cross-sectional shape of an inner wall of the first fitting matches a corresponding cross-sectional shape of an inner wall of the first docking portion.
9. The EGR cooler water inlet tube docking assembly of any one of claims 1-6 wherein a corresponding cross-sectional shape of an inner wall of the second fitting matches a corresponding cross-sectional shape of an inner wall of the second docking portion.
10. The EGR cooler water inlet pipe butt joint assembly according to any one of claims 1-6, wherein a second sealing ring is arranged outside the second joint to seal a gap at the joint of the second joint and the cooler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210295035.7A CN114876677A (en) | 2022-03-24 | 2022-03-24 | EGR cooler inlet tube butt joint subassembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210295035.7A CN114876677A (en) | 2022-03-24 | 2022-03-24 | EGR cooler inlet tube butt joint subassembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114876677A true CN114876677A (en) | 2022-08-09 |
Family
ID=82667836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210295035.7A Pending CN114876677A (en) | 2022-03-24 | 2022-03-24 | EGR cooler inlet tube butt joint subassembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114876677A (en) |
-
2022
- 2022-03-24 CN CN202210295035.7A patent/CN114876677A/en active Pending
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