CN211174397U - Air inlet corrugated pipe of EGR cooler - Google Patents
Air inlet corrugated pipe of EGR cooler Download PDFInfo
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- CN211174397U CN211174397U CN201921554050.9U CN201921554050U CN211174397U CN 211174397 U CN211174397 U CN 211174397U CN 201921554050 U CN201921554050 U CN 201921554050U CN 211174397 U CN211174397 U CN 211174397U
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Abstract
The utility model discloses a bellows of EGR cooler air inlet relates to EGR cooler technical field, connect including air inlet joint, bellows, giving vent to anger, air inlet joint is connected to bellows one end, and its other end is connected and is given vent to anger and connect, still including setting up the honeycomb duct in the bellows, honeycomb duct one end is provided with the diffuser, the diffuser stretches into in the joint of giving vent to anger and unsettled, the diffuser is its internal diameter and is held the toper that becomes big gradually by the air inlet to the gas outlet, the other end of honeycomb duct is the linkage segment, the linkage segment is connected with air inlet joint. The utility model provides a high temperature leads to sealed face high temperature, and the flange warp, and the clamp is heated the back intensity decline and causes the card not tight, and high temperature leads to the bellows to open easily scheduling problem, has simultaneously and reduces the resistance of admitting air, reduces the air current noise characteristics.
Description
Technical Field
The utility model relates to an engine emission technical field, especially a bellows of EGR cooler air intake.
Background
Harmful emissions from engines are a major source of air pollution, and as the importance of environmental protection issues increases, the reduction of harmful emissions from engines becomes an important direction in the development of engines in the world.
The EGR technology is the most effective means for reducing the emission of nitrogen oxides of the diesel engine, and the EGR can reduce the oxygen concentration and the highest combustion temperature in a cylinder to achieve the effect of reducing the nitrogen oxides. EGR is considered to be an important technical means for diesel engines to meet national or international standard emission regulations for automotive emissions. The EGR pipeline in the form of a corrugated pipe is adopted in China to meet the installation requirements of EGR gas taking and connecting pipelines.
The built-in honeycomb duct of current EGR air inlet corrugated pipe has increased the resistance of air current because the internal diameter sudden change easily produces the air current swirl at its end, and secondly some EGR air inlet corrugated pipes are flange joint with the coupling of giving vent to anger, and the high temperature gas swirl concentrates the position near the flange seal face, produces high temperature easily and makes the flange face high temperature warp influence sealed effect. Whereas vortices increase airflow noise from a user experience point of view.
SUMMERY OF THE UTILITY MODEL
To the problem that prior art exists, the utility model provides a bellows of EGR cooler air intake. EGR cooler air intake bellows solves high temperature and leads to sealed face high temperature, and the flange warp, and the clamp intensity drops after being heated, and causes the clamp card not tight to and high temperature leads to the bellows to be easily cracked scheduling problem.
In order to achieve the purpose, the technical scheme of the utility model is as follows:
the utility model provides a corrugated pipe that admits air of EGR cooler, includes air connection, bellows, the joint of giving vent to anger, bellows one end connection air connection, and its other end is connected and is given vent to anger and connect, still including setting up the honeycomb duct in the bellows, honeycomb duct one end is provided with the diffuser, the diffuser stretches into in the joint of giving vent to anger and unsettled, the diffuser is the toper that its internal diameter gradually becomes big by inlet end to gas outlet end, the other end of honeycomb duct is provided with the linkage segment, the linkage segment is connected with air connection. The arrangement can enable a gap to be formed between the built-in flow guide pipe and the corrugated pipe, avoids direct contact between high-temperature corrosive waste gas and the corrugated pipe, can better separate high-temperature gas from the corrugated pipe, avoids scouring corrosion of the corrugated pipe by the high-temperature gas, and prolongs the service life of the corrugated pipe. Meanwhile, the flange sealing surface is insulated, the temperature of the flange sealing surface is reduced, the sealing surface is not easy to be heated and deformed, and stable pressure drop torque can be ensured to ensure the sealing property of the flange surface.
Preferably, the outer wall of the connecting section is connected with the inner wall of the air inlet joint in a sealing manner, for example, the outer wall of the connecting section is connected with the inner wall of the air inlet joint in a sealing manner such as welding or threaded connection. The structure can isolate the corrosion of high-temperature gas in the gas inlet pipe to flange surfaces, clamps, corrugated pipes and other parts.
Preferably, the half cone angle of the diffuser section is β, and the β range is 2.5-7.5 degrees, so that the structure can reduce the effects of gas generation vortex, gas generation noise and gas pressure loss, and when the β angle is less than 2.5 degrees or more than 7.5 degrees, the effects and effects can not be generated.
Preferably, the inner wall of one end of the corrugated pipe is in sealing connection with the outer wall of the air inlet joint, namely the inner wall of one end of the corrugated pipe and the outer wall of the air inlet joint can be in sealing connection in a welding or clamping manner; the outer wall of the other end of the corrugated pipe is connected with the inner wall of the air outlet joint in a sealing mode, for example, the outer wall of the other end of the corrugated pipe and the inner wall of the air outlet joint can adopt a welding mode or a sealing connection mode such as interference fit of the outer wall and the inner wall of the air outlet joint. The arrangement can ensure that the corrugated pipe cannot be in contact with the guide pipe and cannot be in direct contact with high-temperature gas, the corrosion of the high-temperature gas is reduced, and the service life of the corrugated pipe is prolonged.
The utility model has the advantages that:
1. the utility model provides a pair of EGR cooler bellows that admits air, it is thermal-insulated to the flange seal face, reduce the flange seal face temperature, sealed face is difficult to the thermal deformation, guarantees the leakproofness of flange face.
2. The utility model provides a pair of EGR cooler bellows of admitting air forms the clearance between built-in honeycomb duct and the bellows, and is thermal-insulated effectual to the bellows, has avoided the bellows to receive high-temperature gas to erode the corruption, has improved the life of bellows.
3. The utility model provides a pair of EGR cooler bellows that admits air, honeycomb duct end adopt the toper divergent section, and the resistance of admitting air is little, reduces loss of pressure, reduces the air current noise, improves staff operational environment, the oil consumption reduction.
Drawings
Fig. 1 is a schematic structural diagram of an EGR cooler intake bellows provided in embodiment 1 of the present invention;
in the figure, 1-air inlet joint, 2-draft tube, 3-corrugated tube, 4-air outlet joint, 5-connecting section and 6-diffusing section.
Detailed Description
In order to explain the technical content, the achieved objects and the effects of the present invention in detail, the following description is made in conjunction with the embodiments and the accompanying drawings.
Examples
Please refer to fig. 1, the utility model provides a corrugated pipe for air intake of EGR cooler, including air inlet joint 1, bellows 3, the joint 4 of giving vent to anger, air inlet joint 1 is connected to 3 one end of bellows, and the joint 4 of giving vent to anger is connected to its other end, still including setting up honeycomb duct 2 in bellows 3, honeycomb duct 2 one end is provided with diffuser 6, diffuser 6 stretches into in the joint 4 of giving vent to anger and unsettled, diffuser 6 is the toper that its internal diameter gradually becomes big from the air inlet end to the air outlet end, the other end of honeycomb duct 2 is provided with linkage segment 5, linkage segment 5 is connected with air inlet joint 1.
The EGR cooler air inlet corrugated pipe of this embodiment is when using, at first, gaseous 1 coming through air inlet joint, get into honeycomb duct 2, through honeycomb duct 2 in the linkage segment 5 and get into diffuser 6, because diffuser 6 is not direct to be connected with air outlet joint 4, but stretch into one section distance in air outlet joint 4, and still unsettled, such setting, the bellows still can play the expansion that reasons such as the temperature variation of compensation pipeline arouses, the shrink variation, the compensation pipeline radial displacement volume that also can be limited simultaneously, and the effect of weakening the vibration. Meanwhile, the guide pipe 2 isolates parts such as the corrugated pipe from directly contacting the high-temperature corrosive waste gas and the corrugated pipe, so that the service life of the corrugated pipe is prolonged; meanwhile, the flange sealing surface is insulated, so that the temperature of the flange sealing surface is reduced, the sealing surface is not easy to be heated and deformed, and meanwhile, the stable pressure drop torque can be ensured to ensure the sealing property of the flange surface; and the diffusion section 6 at the tail end of the draft tube 2 is conical, so that the eddy generated by gas is reduced, and the pressure loss is reduced.
Furthermore, the outer wall of the connecting section 5 is hermetically connected with the inner wall of the air inlet joint 1, namely, the outer wall of the connecting section and the inner wall of the air inlet joint are hermetically connected in a welding or threaded connection mode. The structure can isolate the corrosion of high-temperature gas in the gas inlet pipe to flange surfaces, clamps, corrugated pipes and other parts.
Further, the half cone angle of the diffuser section 6 is β, and the β angle is in the range of 2.5 to 7.5 degrees, so that the structure can reduce the effects of vortex generation of gas, noise generation of gas and pressure loss of gas, and when the β angle is less than 2.5 degrees or more than 7.5 degrees, the effects and effects are not generated.
Furthermore, the inner wall of one end of the corrugated pipe 3 is connected with the outer wall of the air inlet joint 1 in a sealing manner, namely the inner wall of one end of the corrugated pipe 3 is welded with the outer wall of the air inlet joint 1 or the inner wall and the outer wall are connected in a clamping manner and the like in a sealing manner; the outer wall of the other end of the corrugated pipe 3 is hermetically connected with the inner wall of the air outlet joint 4, namely, the sealing connection between the outer wall of the other end of the corrugated pipe 3 and the inner wall of the air outlet joint 4 can adopt a connection mode such as welding or interference fit between the outer wall of the other end of the corrugated pipe 3 and the inner wall of the air outlet joint 4. The arrangement can prevent the corrugated pipe from contacting with the guide pipe and directly contacting with high-temperature gas, reduce the corrosion of the high-temperature gas and prolong the service life of the corrugated pipe.
Although the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that modifications and improvements can be made thereto. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (4)
1. The utility model provides a corrugated pipe that admits air of EGR cooler, includes air-in connector (1), bellows (3), gives vent to anger and connects (4), air-in connector (1) is connected to bellows (3) one end, and its other end is connected and is given vent to anger and connect (4), its characterized in that, still including setting up honeycomb duct (2) in bellows (3), honeycomb duct (2) one end is provided with diffuser (6), diffuser (6) stretch into give vent to anger and connect in (4) and unsettled, diffuser (6) are its internal diameter by the air inlet end to the toper that the gas outlet end gradually becomes big, the other end of honeycomb duct (2) is provided with linkage segment (5), linkage segment (5) are connected with air-in connector (1).
2. An EGR cooler intake air bellow according to claim 1, characterized in that the outer wall of the connection section (5) is sealingly connected with the inner wall of the intake air connection (1).
3. An EGR cooler intake air bellows according to claim 1 wherein the half cone angle of the diffuser section (6) is β and the β angle is in the range of 2.5-7.5 degrees.
4. An EGR cooler intake air bellow according to claim 1, wherein the inner wall of one end of the bellow (3) is sealingly connected with the outer wall of the intake joint (1), and the outer wall of the other end of the bellow (3) is sealingly connected with the inner wall of the outlet joint (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921554050.9U CN211174397U (en) | 2019-09-18 | 2019-09-18 | Air inlet corrugated pipe of EGR cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921554050.9U CN211174397U (en) | 2019-09-18 | 2019-09-18 | Air inlet corrugated pipe of EGR cooler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211174397U true CN211174397U (en) | 2020-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921554050.9U Active CN211174397U (en) | 2019-09-18 | 2019-09-18 | Air inlet corrugated pipe of EGR cooler |
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| Country | Link |
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| CN (1) | CN211174397U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153584A (en) * | 2021-05-28 | 2021-07-23 | 安徽华菱汽车有限公司 | Pipe connection structure and exhaust gas recirculation system |
| CN113915033A (en) * | 2021-11-12 | 2022-01-11 | 北京美联桥科技集团有限公司 | Heavy EGR cooler with damping structure |
-
2019
- 2019-09-18 CN CN201921554050.9U patent/CN211174397U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153584A (en) * | 2021-05-28 | 2021-07-23 | 安徽华菱汽车有限公司 | Pipe connection structure and exhaust gas recirculation system |
| CN113915033A (en) * | 2021-11-12 | 2022-01-11 | 北京美联桥科技集团有限公司 | Heavy EGR cooler with damping structure |
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