CN201011324Y - Exhaust gas recirculation cooler and its cooling pipe - Google Patents
Exhaust gas recirculation cooler and its cooling pipe Download PDFInfo
- Publication number
- CN201011324Y CN201011324Y CNU2006201089742U CN200620108974U CN201011324Y CN 201011324 Y CN201011324 Y CN 201011324Y CN U2006201089742 U CNU2006201089742 U CN U2006201089742U CN 200620108974 U CN200620108974 U CN 200620108974U CN 201011324 Y CN201011324 Y CN 201011324Y
- Authority
- CN
- China
- Prior art keywords
- cooling tube
- groove
- exhaust gas
- cooling
- tube
- 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
Classifications
-
- 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
Abstract
The utility model discloses an exhaust gas recycling(EGR) cooler which adopts a new cooling tube and is mainly characterized in that the cooling tube is provided with grooves on the tube wall, and the grooves are arrayed alternatively to form spiral effect. When flowing in the cooling tube, the exhaust gas forms spiral turbulent flow first thus the heat exchanging effect is increased; when the cooling water flows outside the cooling tube, the grooves on the cooling water can disturb the cooling water thus a heat isolating layer can not form on the outer surface of the cooling tube and the exhaust gas can be guaranteed to change heat with the cooling water thoroughly. The favorable turbulent flow effect can prevent the particulate matters in the exhaust gas flow from falling on the inner wall of the stainless steel cooling tube, thus the carbon deposit can be avoided effectively. The utility model can improve the heat exchanging rate and prolong the survival life in a large degree.
Description
Technical field
The present invention relates to a kind of exhaust gas recirculation (EGR) cooler that adopts novel pipe structure for cooling.Egr system is the waste gas in order to the recirculation internal-combustion engine, reduces the generation of nitrogen oxide (NOx).The cooler for recycled exhaust gas effect is the waste gas of cooling recirculation.
Background technique
Recently, in order to reduce nitrogen oxide (NOx) content in the automobile engine to exhaust, adopted exhaust gas recirculation (EGR) technology.Promptly the waste gas that burning back in internal-combustion engine (diesel engine, petrol engine) is discharged is in right amount in (part) introducing inlet manifold, enter cylinder with fresh air or atomizing mixed gas after mixing and burn again, so that reduce the content of the nitrogen oxides of exhaust gas (NOx) of motor discharge.But, after a part of waste gas and fresh air or atomizing mixed gas mix, the temperature of air inlet is raise, this has not only improved combustion temperature, to inhibition NO
XIt is unfavorable to generate, and can increase the heat load of motor, influences the serviceability of motor.So, with before fresh air mixes, being necessary the waste gas by the EGR valve is cooled off in advance, this just needs to adopt cooler for recycled exhaust gas.Cooler for recycled exhaust gas cools off the waste gas of recirculation, thereby under the condition of the output power that does not significantly reduce motor, the temperature of engine chamber is reduced, thereby has reduced the generation of nitrogen oxide (NOx).
Early stage cooler for recycled exhaust gas, what use is the level and smooth Stainless Steel Tube of inner and outer surface, when the waste gas of engine emission during by the level and smooth Stainless Steel Tube of this inner and outer surface, the heat of waste gas is shed, but because waste gas flowing state linearly in level and smooth Stainless Steel Tube, so its radiating efficiency is lower, and by increasing the quantity of smooth tubes, though can increase heat exchange area, the volume of cooler more greatly, heavier, the cost of making and installing is higher.
Fig. 1-the 3rd, the sectional drawing of the traditional E GR cooler of the level and smooth stainless steel cooling pipe of employing.In the drawings, 1 represents cylindrical housings, and the end plate 2 of having fitted respectively at its axial two ends has been arranged many cooling tubes 3 in enclosure interior along the housing axial direction, the two ends of these cooling tubes respectively with the end plate 2 at two ends on the hole embed and cooperate.Cooling water inlet pipe 4 and outlet pipe 5 are arranged on the relative position of both sides of housing, so cooling water 9 enters in the housing 1 by intake pipe 4, and housings 1 are flowed out by outlet pipe 5 then in the periphery of the cooling tube 3 of flowing through.And in the both sides of housing 1, taper gas collecting tube 6 is assemblied in respectively on the end plate 2, suction port 7 and air outlet 8 have been formed, thereby the waste gas 10 of discharging from the firing chamber enters gas collecting tube 6 by suction port 7, when flowing through cooling tube 3, after with the cooling water 9 of cooling tube 3 peripheries of flowing through heat exchanges taking place, be recycled to cylinder by air outlet 8 from gas collecting tube 6 again.
This cooler for recycled exhaust gas, for the gas side, level and smooth stainless steel cooling pipe is not owing to carry out the structural design of turbulent flow to gas, and high-temp waste gas 10 is straight-through in level and smooth stainless steel cooling pipe 3, does not have turbulent effect, makes waste gas 10 not good with the heat exchange effect of cooling water 9; Moreover because of in the turbulent flow that lacks waste gas 10, the solid particles such as carbon in the waste gas 10 are heavy easily to be attached on the inwall of level and smooth stainless steel cooling pipe 3, forms carbon distribution, reduces the heat exchange effect.For the water side, when flow in the space of cooling water 9 between level and smooth stainless steel cooling pipe 3 outer surfaces, because the outer surface of cooling tube 3 is smooth, cooling water 9 can gasify at level and smooth stainless steel cooling pipe 3 outer walls of high temperature, easy shape is one deck gas thermal-protective coating also, is totally unfavorable to the heat exchange between waste gas 10 and the cooling water 9.
Summary of the invention
For making the fully heat exchange of cooler for recycled exhaust gas gas side and water side, the exchange capability of heat of cooler for recycled exhaust gas is improved, the invention provides a kind of cooler for recycled exhaust gas and cooling tube thereof of new structure.
This invention relates generally to a kind of cooler for recycled exhaust gas: the cooling tube that comprises housing and employing new structure, housing shaft to the two ends end plate of having fitted respectively, a plurality of cooling tubes have been arranged in enclosure interior along the housing axial direction, the two ends of these cooling tubes respectively with the end plate at two ends on the hole embed and cooperate, it is characterized in that described cooling tube tube wall is provided with groove.
As a further improvement on the present invention, described groove is a plurality of, and is intermittently and is staggered.Thereby formation spiral effect.Rotation direction angle θ between described a plurality of groove and the axis can be between 15 ° and 90 °.
Described intermittently being staggered can be achieved in that described each groove is ring shaped slot, and a plurality of grooves prolong axially evenly setting.Perhaps and then with above-mentioned ring groove evenly interrupt formation.
Described intermittently being staggered also can be achieved in that evenly to be interrupted by single helical groove, double helix groove or many helical grooves and form.
Further improve as of the present invention, described groove also can be continuous single-screw groove, double helix groove or many helical groove again.
This invention also relates to a kind of cooling tube that is used for the new structure of cooler for recycled exhaust gas, and the tube wall of the cooling tube of this invention is provided with groove.For making stainless steel cooling pipe under the big as far as possible prerequisite of the area that guarantees turbulent flow, reduce the resistance of the interior lug, nib of pipe simultaneously to waste gas as far as possible, by theoretical calculation and test, groove rotation direction angle θ on the stainless steel cooling pipe can select between 15 ° and 90 °, notching joint can be selected between 6mm and 15mm apart from P, and depth of groove can be between 0.4mm and 1.0mm.The diameter of cooling tube is 6～14mm, and wall thickness is 0.25～0.5mm, and this stainless steel cooling pipe can adopt seamless steel pipe, also can adopt the Stainless Steel Tube of welding fabrication.
Like this, when waste gas flows, established the rational groove of distribution density in cooling tube, make the waste gas that passes through produce the eddy current disorder, the heat exchange effect that has improved greatly because the cooling tube inwall is evenly pressed; Cooling water is when the cooling tube flows outside simultaneously, and the groove on the cooling tube carries out flow-disturbing to cooling water, and the outer surface of cooling tube just can not form heat insulation gas-bearing formation, guarantees to make waste gas and fully heat exchange of cooling water; The existence of groove has simultaneously increased heat exchange area, has improved heat exchange effect.Because good turbulence effect can't be deposited on the inwall of stainless steel cooling pipe the particulate matter in the exhaust flow in the pipe, thereby prevented that effectively the carbon distribution phenomenon from taking place.Thereby obtained the favorable actual application effect.
Description of drawings
Fig. 1 is the sectional view of traditional E GR cooler.
Fig. 2 is the schematic representation after cutting open along the I-I direction of arrow among Fig. 6.
Fig. 3 is the sectional view of the cooling tube of traditional outer surface smoother.
Fig. 4 is the sectional view of cooler for recycled exhaust gas of the present invention.
Fig. 5 is the cooling tube shaft side figure of new structure of the present invention.
Fig. 6 is the plan view of the cooling tube of new structure of the present invention.
Fig. 7 is the sectional view of the cooling tube of new structure of the present invention.
Fig. 8 is the enlarged view of the cooling tube upper groove of new structure.
Among the figure: 1-housing 2-end plate 3-cooling tube 4-intake pipe 5-outlet pipe
6-gas collecting tube 7-suction port 8-air outlet 9-cooling water 10-waste gas 11-groove
Embodiment
Followingly be specifically described with reference to the embodiment of accompanying drawing to cooler for recycled exhaust gas of the present invention.With reference to Fig. 1-3, existing cooler for recycled exhaust gas is new, and its defective front was described, and did not repeat them here.
With reference to Fig. 4,8, cooler for recycled exhaust gas of the present invention is the improvement of doing on the basis of traditional E GR cooler, and its agent structure is constant substantially, and difference is to have a plurality of grooves 11 on the cooling tube tube wall, and described a plurality of groove 11 is to be intermittently staggered, thereby forms spiral effect.For making stainless steel cooling pipe under the big as far as possible prerequisite of the area that guarantees turbulent flow, reduce the resistance of the interior lug, nib of pipe simultaneously to waste gas as far as possible, by theoretical calculation and test, as shown in Figure 4, groove rotation direction angle θ on the stainless steel cooling pipe can select between 15 ° and 90 °, and notching joint can be selected between 6mm and 15mm apart from P.In Fig. 5, the cooling tube of this new E GR cooler outside extrudes " U " type groove, and depth of groove H can be between 0.4mm and 0.8mm.
When waste gas flows, at first can form screw type turbulent flow in cooling tube of the present invention, improve the heat exchange effect; Secondly cooling water is when the cooling tube flows outside, and the groove on the cooling tube can carry out flow-disturbing to cooling water, and the outer surface of cooling tube just can not form heat insulation gas-bearing formation, guarantees the fully heat exchange of waste gas and cooling water.Because good turbulence effect can't be deposited on the inwall of stainless steel cooling pipe the particulate matter in the exhaust flow in the pipe, thereby prevented that effectively the carbon distribution phenomenon from taking place.Thereby use this new structure cooling tube can improve the heat exchange effect and the working life of cooler greatly.
Cooler for recycled exhaust gas that the present invention relates to and cooling tube not only are confined to the foregoing description, and various similar conversion and modification all do not break away from category of the present invention.For the groove (other shapes such as " U " type, " V " type, hemisphere) of Any shape, for the groove (spiral, non-helical) of any arrangement mode all at category of the present invention.
Claims (9)
1. the cooling tube of a cooler for recycled exhaust gas comprises body, it is characterized in that described cooling tube (3) tube wall is provided with groove (11).
2. cooling tube as claimed in claim 1 is characterized in that described groove (11) for a plurality of, and is intermittently and is staggered.
3. cooling tube as claimed in claim 2 is characterized in that described a plurality of groove (11) forms helical arrangement.
4. cooling tube as claimed in claim 1 is characterized in that described groove also can be continuous single-screw groove, double helix groove or many helical groove.
5. as any one described cooling tube of claim 1～4, it is characterized in that the rotation direction angle (θ) between described groove (11) and the axis is 15 °～90 °.
6. as any one described cooling tube of claim 5, the pitch (P) that it is characterized in that described groove (11) is between 6mm and 15mm.
7. cooler for recycled exhaust gas, comprise housing (1) and cooling tube (3), the end plate (2) of having fitted respectively at the axial two ends of housing (1), a plurality of cooling tubes (3) are axially disposed within the housing (1), its two ends respectively with respective end plates (2) on the hole embed and to cooperate, it is characterized in that described cooling tube (3) tube wall is provided with groove (11).
8. cooler as claimed in claim 7 is characterized in that described groove (11) for a plurality of, and is intermittently and is staggered.
9. cooler as claimed in claim 8 is characterized in that described a plurality of groove (11) forms helical arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201089742U CN201011324Y (en) | 2006-10-26 | 2006-10-26 | Exhaust gas recirculation cooler and its cooling pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201089742U CN201011324Y (en) | 2006-10-26 | 2006-10-26 | Exhaust gas recirculation cooler and its cooling pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201011324Y true CN201011324Y (en) | 2008-01-23 |
Family
ID=39046268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006201089742U Expired - Lifetime CN201011324Y (en) | 2006-10-26 | 2006-10-26 | Exhaust gas recirculation cooler and its cooling pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201011324Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564190A (en) * | 2012-02-08 | 2012-07-11 | 浙江银轮机械股份有限公司 | Combined corrugated flat cooling pipe and manufacturing method thereof |
| CN104421052A (en) * | 2013-08-30 | 2015-03-18 | 现代自动车株式会社 | Egr cooler and egr cooler device using the same |
| CN105910966A (en) * | 2016-06-21 | 2016-08-31 | 西华大学 | Particulate matter deposition path experiment table and experiment method |
| CN107476902A (en) * | 2017-07-20 | 2017-12-15 | 浙江驰捷动力系统有限公司 | A kind of manufacture method of cooler and cooler |
| CN107542602A (en) * | 2016-06-29 | 2018-01-05 | 翰昂汽车零部件有限公司 | Gaseous effluent |
| CN108104987A (en) * | 2017-12-14 | 2018-06-01 | 浙江银轮机械股份有限公司 | A kind of cooler for recycled exhaust gas being easily assembled |
| CN108383371A (en) * | 2016-04-12 | 2018-08-10 | 杭州富通通信技术股份有限公司 | Drawing optical fibers technique |
| CN109682728A (en) * | 2019-01-15 | 2019-04-26 | 西华大学 | It is a kind of for measuring the cooler and its measurement method of particulate matter deposition path |
| US11486337B2 (en) | 2019-09-06 | 2022-11-01 | Deere & Company | Integrated exhaust system apparatus |
-
2006
- 2006-10-26 CN CNU2006201089742U patent/CN201011324Y/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564190A (en) * | 2012-02-08 | 2012-07-11 | 浙江银轮机械股份有限公司 | Combined corrugated flat cooling pipe and manufacturing method thereof |
| CN104421052A (en) * | 2013-08-30 | 2015-03-18 | 现代自动车株式会社 | Egr cooler and egr cooler device using the same |
| CN104421052B (en) * | 2013-08-30 | 2019-01-22 | 现代自动车株式会社 | Cooler for recycled exhaust gas and the cooler arrangement for using cooler for recycled exhaust gas |
| CN108383371A (en) * | 2016-04-12 | 2018-08-10 | 杭州富通通信技术股份有限公司 | Drawing optical fibers technique |
| CN105910966B (en) * | 2016-06-21 | 2018-08-21 | 西华大学 | A kind of particulate matter deposition path experimental bench and experimental method |
| CN105910966A (en) * | 2016-06-21 | 2016-08-31 | 西华大学 | Particulate matter deposition path experiment table and experiment method |
| CN107542602A (en) * | 2016-06-29 | 2018-01-05 | 翰昂汽车零部件有限公司 | Gaseous effluent |
| CN107476902A (en) * | 2017-07-20 | 2017-12-15 | 浙江驰捷动力系统有限公司 | A kind of manufacture method of cooler and cooler |
| CN107476902B (en) * | 2017-07-20 | 2023-09-26 | 浙江驰捷动力系统有限公司 | Cooler and manufacturing method thereof |
| CN108104987A (en) * | 2017-12-14 | 2018-06-01 | 浙江银轮机械股份有限公司 | A kind of cooler for recycled exhaust gas being easily assembled |
| CN109682728A (en) * | 2019-01-15 | 2019-04-26 | 西华大学 | It is a kind of for measuring the cooler and its measurement method of particulate matter deposition path |
| CN109682728B (en) * | 2019-01-15 | 2023-09-22 | 西华大学 | Cooler for measuring particle deposition path and measuring method thereof |
| US11486337B2 (en) | 2019-09-06 | 2022-11-01 | Deere & Company | Integrated exhaust system apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201011324Y (en) | Exhaust gas recirculation cooler and its cooling pipe | |
| CN103061867B (en) | A kind of gas-liquid type intercooler | |
| CN209212376U (en) | Supercharged direct-injection engine air intake duct | |
| CN108397311A (en) | A kind of gas engine air inlet mixing chamber | |
| CN100460796C (en) | Multi-tube pass type heat exchanger | |
| CN101526048A (en) | Waste gas high-efficiency cooling system with high EGR efficiency | |
| CN206448889U (en) | Double air passage air inlet pipe of diesel engine | |
| CN101245973B (en) | Double-U type loop heat exchanger | |
| CN204202469U (en) | Wing type flat heat exchange pipe | |
| CN2881504Y (en) | Waste gas recirculation cooler for preventing heat deforming | |
| CN201420627Y (en) | EGR cooler for diesel | |
| CN201221907Y (en) | Double-U type loop heat exchanger | |
| CN2901226Y (en) | Heat exchanger of multitube distance | |
| CN107514809A (en) | A kind of hot air heat exchanger of biomass combustion equipment | |
| CN107621079A (en) | A kind of hot air heat exchanger of biomass combustion equipment | |
| CN201262524Y (en) | Exhaust gas recirculation refrigerating device of engine | |
| CN112302840A (en) | Fuel processor for internal combustion engine | |
| CN207093238U (en) | A kind of high-low pressure hybrid EGR systems of vehicle motor and there is its vehicle | |
| WO2003093753A1 (en) | A stainless pipe used in a cooler for a diesel engine egr system | |
| CN212429044U (en) | Spiral tube core for cooler | |
| CN201250720Y (en) | EGR cooler | |
| CN108413433A (en) | A kind of combustion gas gatherer | |
| CN212429045U (en) | Pipe core for exhaust gas recirculation cooler | |
| CN204327324U (en) | A kind of cooler for recycled exhaust gas | |
| CN2911595Y (en) | Crossed spiral recess heat exchanging pipes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Hubei Yinlun Machinery Co., Ltd. Assignor: Zhejiang Yinlun Machinery Co., Ltd. Contract record no.: 2012420000131 Denomination of utility model: Exhaust gas recirculation cooler and its cooling pipe Granted publication date: 20080123 License type: Exclusive License Record date: 20120912 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080123 |
|
| EXPY | Termination of patent right or utility model |