CN201373683Y - Exhaust gas recirculation cooler - Google Patents
Exhaust gas recirculation cooler Download PDFInfo
- Publication number
- CN201373683Y CN201373683Y CN200920105691U CN200920105691U CN201373683Y CN 201373683 Y CN201373683 Y CN 201373683Y CN 200920105691 U CN200920105691 U CN 200920105691U CN 200920105691 U CN200920105691 U CN 200920105691U CN 201373683 Y CN201373683 Y CN 201373683Y
- Authority
- CN
- China
- Prior art keywords
- water pipe
- cooler
- exhaust gas
- shell
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Exhaust-Gas Circulating Devices (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model relates to an exhaust gas recirculation cooler which comprises a pipe shell, a water pipe, a heat exchange pipe, a pipe plate, a flange and a seal head, wherein a collar hole is arranged on the pipe shell, a water pipe plug is arranged at one end of the water pipe, and the water pipe plug is inserted in the collar hole which is connected with the water pipe plug by brazing. Compared with the commonly applied direct hole opening way of the pipe shell, the exhaust gas recirculation cooler realizes the formation of the open hole structure which is similar to a collar on the rectangular pipe shell or the circular pipe shell by the appropriate processing technology, so that the exhaust gas recirculation cooler can effectively enhance the connecting strength of a part, correspondingly ensure the realization of the performance of the cooler, further lead the cooler to play the cooling effect of recirculative exhaust gas, reduce the emissions of nitrogen oxides in the exhaust gas, make due contributions to environmental protection, adopt the brazing way for implementing the hard connection, namely increase the connection strength, optimize the manufacturing technology and be applicable to mass production.
Description
Technical field
The utility model relates to a kind of cooler for recycled exhaust gas, the cooler that adds in particularly a kind of automobile exhaust gas recirculating system, and production technology that the hole design optimization has been claimed in the shell of this cooler and water pipe employing has improved production efficiency.
Background technology
The applicating history of heat exchanger is long, but still is in continuous improvement and the development.Heat exchanger is 40%～60% of the whole technological equipment investment of Ying Zhongzhan of industries such as petrochemical industry, machine-building, oil refining, metallurgy, light industry, pharmacy, food, so new type heat exchanger continues to bring out along with improving of science and technology.Specific to automotive field, related heat exchanger mainly is meant engine exhaust recirculated cooling system cooler, just our cooler for recycled exhaust gas of often saying.The application of cooler for recycled exhaust gas is one of effective measures of automobile industry reduction motor vehicle exhaust emission.Waste gas recirculation cooling technology is to add cooler in the gas recirculation system, after the waste gas of the part cycling and reutilization that automobile engine is discharged cools off by cooler for recycled exhaust gas earlier, the combustion chamber that passes back to engine again and a kind of technology of burning after fresh air fully mixes.This technology is utilized and is contained a large amount of chemically inactive gas (CO in the waste gas
2, N
2, H
2O) have this characteristic of higher specific heat and reduce NO
xGeneration.Because NO
xFormation condition be high-temperature oxygen-enriched, and the introducing of the low waste gas of temperature makes gaseous mixture thermal capacity increase on the one hand, makes the gaseous mixture of the same amount then required heat of same temperature that raises increase, thereby effectively reduces maximum combustion temperature, has departed from NO
xHigh temperature generate the district; Waste gas is to the also corresponding concentration that reduces oxygen of the dilution of fresh air on the other hand, thereby suppresses NO effectively
xGeneration.Therefore in gas recirculation system, being provided with efficiently, cooler for recycled exhaust gas can make the exhaust emissions amount of automobile satisfy the requirement of strict rules.
At present, the heat exchanger used of vehicle engine exhaust gas recirculation system has two big classes.One class is a plate-fin heat exchanger, and a class is a shell-and-tube heat exchanger, and wherein the type application with shell-and-tube heat exchanger is the most extensive.Because the adding of cooler for recycled exhaust gas all can exert an influence to the whole cooling system of engine, cooler not only requires compact efficient, the more important thing is and guarantee its reliability, prevent to produce leakage owing to welding effect is bad, if leaking appears in running in cooler, with direct injury to damaging property of engine.Because cooler for recycled exhaust gas is divided into gas side and two passages of water side, pass through high-temperature gas in the heat exchanger tube, the interior cooling agent of shell by engine, if leaking appears in the gas side, cooling agent is entered in the heat exchanger tube, and then make cooler enter gas extraction system, will destroy the normal operation of gas circuit, thereby cause destruction engine; If leaking appears in coolant side, the junction that is cooling agent by shell and water pipe leaks in the environment, then can cause the continuous loss of cooling agent, finally make the whole cooling system of engine ineffective, can cause very big injury to engine equally, therefore, take place for fear of this situation, must strengthen the weld strength of cooler shell and water pipe junction, to guarantee the reliability of cooler.
In the cooler for recycled exhaust gas that at present designs at home and produce, the junction of shell and water pipe, generally with the direct opening of shell, inserting the mode of welding by argon arc behind the water pipe connects or connects by brazing mode, this dual mode all has its intrinsic defective, though argon arc welding connects the intensity that may guarantee welding, is unsuitable for batch production requirement in this ways of connecting; And directly is being connected with the water pipe soldering behind the opening on the shell since shell and water pipe to be connected area little and joint face is irregular, therefore be difficult to the assurance weld strength, so need provide a kind of novel cooler for recycled exhaust gas to address the above problem.
Summary of the invention
The novel purpose of this reality is to carry a kind of cooler for recycled exhaust gas, this cooler for recycled exhaust gas is provided with claims the hole, increased the contact-making surface knot of shell and water pipe, the mode by soldering links together the two, has promptly increased when the intensity that connects is suitable for producing in batches again and has used.
The purpose of this utility model is achieved in that a kind of cooler for recycled exhaust gas, comprise shell, water pipe, heat exchanger tube, tube sheet, flange, end socket, on described shell, be provided with and claim the hole, end at described water pipe is provided with the water pipe plug, this water pipe plug is inserted into described claiming in the hole, and the described hole of claiming is connected with the soldering of water pipe plug.
Compared with the prior art the utility model has following advantage:
1. the utility model adopts the design of claiming the hole is installed on the shell, compared to the direct perforate mode of the shell of common application, has advantage easy to process equally, be implemented in the open-celled structure that forms similar collar on rectangle or the circular shell by suitable processing technology, can strengthen the bonding strength of parts effectively, thereby guaranteed that cooler leakage situation can not occur in coolant side, correspondingly also be achieved with regard to the performance that has guaranteed cooler, thereby make cooler play cooling effect to EGR gas, reduced the discharging of oxynitrides in the waste gas, environmental protection has been made a due contribution.
2. the utility model is changed the method for attachment of argon arc welding in the past, adopts brazing mode that it is implemented hard the connection, has promptly increased the intensity that connects, and has optimized manufacturing process, is suitable for producing in batches.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is the stereogram of double-U type loop cooler in the utility model;
Fig. 2 is the assembling schematic diagram of the cooler of cuboid for the utility model middle shell;
Fig. 3 is the structural representation of the cooler of cuboid for the utility model middle shell;
Fig. 4 is the structural representation of the cooler of cuboid for the utility model middle shell; (left view of Fig. 3)
Fig. 5 is the structural representation of cylindrical cooler for the utility model middle shell;
Fig. 6 is the structural representation of cylindrical cooler for the utility model middle shell.(right view of Fig. 5)
The specific embodiment
Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, shown in Figure 6, a kind of cooler for recycled exhaust gas, comprise shell 1, water pipe 2, heat exchanger tube 3, tube sheet 4, flange 5, end socket 6, on described shell, be provided with and claim hole 11, end at described water pipe is provided with water pipe plug 22, this water pipe plug is inserted into described claiming in the hole, and the described hole of claiming is connected with the soldering of water pipe plug, and the described hole of claiming can be arranged on optional position on the shell as required.On shell, be provided with two at least and claim the hole.
Be provided with positive stop lug boss 21 on described water pipe plug, this positive stop lug boss can play position-limiting action after the insertion of water pipe plug is claimed in the hole.
Described shell can for cuboid or cylinder one of them.
Described water pipe can be straight tube or bend pipe one of them.
The described hole shape of claiming is circular, and this claims hole size and described water pipe plug size adapts.
The described hole height of claiming is 2～5mm.
The cooler that cooler shown in Figure 1 designs for double-U type loop, promptly no matter in the gas side of cooler or in coolant side, the route that medium moved is the U type, therefore be referred to as double-U type loop heat exchanger, and the heat exchanger tube that cooler adopted is flat-shaped heat exchanger tube.Flat-shaped heat exchanger tube is compared than circular heat exchanger tube, under the long-pending situation of same cross-sectional, the girth of flat-shaped heat exchanger tube is bigger than circular heat exchanger tube, that is to say in same length, and under the identical situation of sectional area, its heat exchange area of heat exchanger of using flat pipe is bigger than the heat exchange area of the heat exchanger of using round tube, thereby can improve the heat exchange effect; On the other hand, flat-shaped heat exchanger tube is not centrosymmetric shape, its geometric center is littler with the distance of tube wall than round tube center with the distance of tube wall, most of fluid can participate in heat exchange in the pipe, and the shape of flat pipe makes the disturbance of fluid strengthen, and has also strengthened the heat exchange effect, thereby the temperature of high-temperature gas in the pipe is descended rapidly, the import and export temperature difference increases, and has improved the heat exchange efficiency of cooler.The waste gas that temperature reduces with enter engine after fresh air mixes and participate in again burning, can reduce maximum combustion temperature effectively, correspondingly reduced NO
xDischarging, satisfy the environmental requirement of increasingly stringent.
Referring to Fig. 4, this figure is the left view of Fig. 3, from then on figure as can be seen two water pipes 2 be distributed in the two sides place of shell, and lay respectively at the two ends of shell, the arrangement of water pipe 2 can reasonably be placed according to the layout of engine-cooling system, and this figure is a signal of placement location, in this case, flow of coolant is a through type, if water pipe 2 is arranged in the same end place near shell, then the flow of coolant mode is U type loop.
Referring to Fig. 5 and Fig. 6, Fig. 5 shows be cylinder shell 1 and the connected mode of straight pipe type water pipe 2, and the hole 11 of claiming of shell 1 is designed and directly contacted with the water pipe plug ends of water pipe 2, and the mode by soldering is with the two tight connection; As can be seen from Figure 5, the layout of two water pipes 2 is 90 degree angles; Fig. 6 is the right view of Fig. 5, and as can be seen from Figure 6, two water pipes 2 lay respectively at the place, two ends of shell 1, can design placement location to water pipe on shell according to actual conditions.
Adopt to open on the shell 1 and claim hole 11, and the design of positive stop lug boss is set at the water pipe plug place of water pipe 2, can when assembling, assemble two parts fast, and accurate positioning; While is owing to direct insertion of the water pipe plug of the close positive stop lug boss of water pipe 2 claimed in the hole 11, thereby make the contact area of shell 1 and water pipe bigger, when adopting brazing mode to connect firmly, can greatly improve the intensity of welding, guarantee welding reliability, and this method is used when being particularly suitable for producing cooler in batches.The only guaranteed reliability of cooler just can make the function of cooler further obtain embodying, thereby makes due contribution for the environmental requirement of increasingly stringent.
Claims (6)
1, a kind of cooler for recycled exhaust gas, it is characterized in that: a kind of cooler for recycled exhaust gas, comprise shell, water pipe, heat exchanger tube, tube sheet, flange, end socket, on described shell, be provided with and claim the hole, end at described water pipe is provided with the water pipe plug, this water pipe plug is inserted into described claiming in the hole, and the described hole of claiming is connected with the soldering of water pipe plug.
2, cooler for recycled exhaust gas according to claim 1 is characterized in that: be provided with positive stop lug boss on described water pipe plug.
3, cooler for recycled exhaust gas according to claim 1 is characterized in that: described shell be cuboid or cylinder one of them.
4, cooler for recycled exhaust gas according to claim 1 is characterized in that: described water pipe be straight tube or bend pipe one of them.
5, cooler for recycled exhaust gas according to claim 1 is characterized in that: the described hole shape of claiming is for circular, and this claims hole size and described water pipe plug size adapts.
6, cooler for recycled exhaust gas according to claim 1 is characterized in that: the described hole height of claiming is 2～5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920105691U CN201373683Y (en) | 2009-02-11 | 2009-02-11 | Exhaust gas recirculation cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920105691U CN201373683Y (en) | 2009-02-11 | 2009-02-11 | Exhaust gas recirculation cooler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201373683Y true CN201373683Y (en) | 2009-12-30 |
Family
ID=41499768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920105691U Expired - Lifetime CN201373683Y (en) | 2009-02-11 | 2009-02-11 | Exhaust gas recirculation cooler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201373683Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103352741A (en) * | 2013-07-12 | 2013-10-16 | 杭叉集团股份有限公司 | Main cooler assembly |
-
2009
- 2009-02-11 CN CN200920105691U patent/CN201373683Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103352741A (en) * | 2013-07-12 | 2013-10-16 | 杭叉集团股份有限公司 | Main cooler assembly |
| CN103352741B (en) * | 2013-07-12 | 2015-12-09 | 杭叉集团股份有限公司 | Main cooler assembly |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101655053B (en) | Series connection type waste gas recycling cooler for medium and heavy duty vehicle | |
| US6595274B2 (en) | Exhaust gas heat exchanger | |
| US10151279B2 (en) | Apparatus for cooling vehicle engine | |
| KR20050039793A (en) | A recursion an exhaust gas cooling device again | |
| US6976530B2 (en) | Exhaust heat exchanger | |
| CN101576029B (en) | Exhaust gas recirculation cooler for medium and heavy-duty vehicle with ridge ring | |
| CN201373683Y (en) | Exhaust gas recirculation cooler | |
| CN109387110B (en) | Heat exchange tube structure and modularized cooler for eliminating thermal expansion and contraction damage effects | |
| CN201420626Y (en) | Waste gas recirculation cooler with ridge rings for medium and heavy vehicles | |
| KR100716449B1 (en) | Recycle apparatus for exhaust gas and water-cooling type intercooler's dimple plate tube and making method | |
| CN101514877A (en) | Exhaust gas recirculation cooler used for medium and heavy-duty automobiles | |
| CN2881504Y (en) | Exhaust gas recirculation cooler capable of preventing thermal deformation | |
| CN202108616U (en) | Heat exchanger for exhaust gas recirculation system | |
| CN201125804Y (en) | Internal combustion engine waste gases recirculating system | |
| KR101836766B1 (en) | Engine And Cooling Method For Vehicle | |
| KR102123452B1 (en) | EGR cooler for Motor Vehicle | |
| CN220566163U (en) | Supporting structure of EGR cooler | |
| CN211975217U (en) | High-efficient plate-fin EGR cooler | |
| CN216157790U (en) | EGR cooler and engine with same | |
| CN204783338U (en) | Diesel engine is EGR cooler for exhaust gas recirculation cooling system | |
| KR100774690B1 (en) | Egr cooler for automobile | |
| CN217501829U (en) | EGR cooler inlet tube butt joint subassembly | |
| CN215949689U (en) | Circular tube type internal combustion engine exhaust gas recirculation cooler | |
| CN201368681Y (en) | Exhaust gas recirculation cooler for medium and heavy vehicles | |
| CN216714565U (en) | Exhaust gas recirculation cooler and engine with same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091230 |