CN104005886A - EGR (Exhaust Gas Recirculation) mixer for marine diesel engine - Google Patents
EGR (Exhaust Gas Recirculation) mixer for marine diesel engine Download PDFInfo
- Publication number
- CN104005886A CN104005886A CN201410253160.7A CN201410253160A CN104005886A CN 104005886 A CN104005886 A CN 104005886A CN 201410253160 A CN201410253160 A CN 201410253160A CN 104005886 A CN104005886 A CN 104005886A
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- egr
- mixer
- diesel engine
- egr gas
- marine diesel
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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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Abstract
The invention provides an EGR (Exhaust Gas Recirculation) mixer for a marine diesel engine. The EGR mixer comprises a mixer housing, an EGR gas introducing device and a discharging hole; the EGR gas inducting device is arranged on the mixer housing; the discharging hole formed in the lowest part of the mixer housing is used for discharging acidic liquid that is separated out during mixing high-temperature EGR gas with inter-cooled fresh air. According to the EGR mixer for the marine diesel engine, the discharging hole is formed in the lowest part of the mixer housing, which effectively overcomes the problem of discharging acidic liquid and prevents acidic liquid from entering the cylinder, and thus the EGR mixer is applicable to the marine diesel engine; an outlet end of an EGR gas introducing pipe is closed, a gas spray hole that is axially vertical to the fresh air flowing direction is formed in the EGR gas introducing pipe, and thereby, the EGR gas is vertical to the fresh air in flowing direction to generate a local turbulence which is beneficial for full mixing of gas; the EGR mixer for the marine diesel engine is simple in structure, and can be integrally dismounted, so that parts of the mixer can be conveniently replaced and temporarily dismounted for examination.
Description
Technical field
The present invention relates to marine diesel engine field, particularly relate to a kind of gas recirculation system mixer for marine diesel engine.
Background technique
EGR (Exhaust Gas Recirculation) system, be called for short EGR, be to send again the sub-fraction of the waste gas of motor generation back to technology that cylinder burns once again, particularly, after the waste gas that motor is discharged mixes in EGR mixer with fresh air, enter cylinder.
EGR mixer is the important component part of egr system, and its effect is that fresh air after the EGR gas waste gas of diesel engine intake (introduce) and charge inter cooling is fully mixed, and spatially component is even to make the diesel engine intake at EGR mixer outlet place.
At present, the structural type of EGR mixer is more, and for example: Chinese patent CN103397956A proposes, in EGR mixer, spoiler is set, Chinese patent CN102913342A proposes, between mixer body and mixer adapter, turbulent is set.Although the mixer of these different structure type can effectively improve the mixed effect of EGR gas and fresh air, improve the uniformity of each cylinder of motor EGR air inlet, but its structure is relatively complicated, easily causes larger restriction loss, affects motor charging efficiency.
In addition, the sulphur content of fuel oil that marine diesel engine uses is higher, its waste gas medium sulphide content content is also higher, when making EGR gas and low temperature fresh air after charge inter cooling mixing, can separate out and there is corrosive acidic liquid, this part liquid does not allow to enter cylinder, and above-mentioned EGR mixer is owing to being mainly used in vehicular engine, its sulphur content of fuel oil using is lower, waste gas medium sulphide content content is also lower, when mixing, gas can't separate out acidic liquid, therefore, when EGR mixer design, there is no acidic liquid releasing device, therefore these EGR mixers are not also suitable for marine diesel engine.
Those skilled in the art are devoted to the EGR mixer for marine diesel engine, to meet the demand of marine diesel engine.
Summary of the invention
The invention provides a kind of mixer for marine diesel engine egr system, by the lowest part at mixer case, release aperture is set on the one hand, effectively solved the release And Spread of Solute of the acidic liquid of separating out when high temperature EGR gas mixes with fresh air after charge inter cooling, guarantee that acidic liquid does not enter cylinder, effectively avoid the corrosion of acidic liquid to engine components, affect engine operation reliability, make EGR mixer be applicable to marine diesel engine; On the other hand by the gas outflow end sealing of EGR gas inlet tube, a plurality of gas spray orifices that axial direction is vertical with fresh air flow direction are set on EGR gas inlet tube, make EGR gas vertical with fresh air flow direction, thereby can form local flow-disturbing, thereby be conducive to gas, fully mix.
Adopt the EGR mixer for marine diesel engine provided by the invention, fully hybrid EGR gas and fresh air, can discharge acidic liquid again, and EGR mixer structure is simple simultaneously, is applicable to marine diesel engine.
EGR mixer for marine diesel engine provided by the invention, comprise mixer case, EGR gas introducing apparatus and release aperture, EGR gas introducing apparatus is arranged on mixer case, release aperture is for discharging the acidic liquid of separating out when high temperature EGR gas mixes with fresh air after charge inter cooling, release aperture is arranged at the lowest part of mixer case, the inclined bottom surface setting of described mixer case, for described acidic liquid provides water conservancy diversion.
Release aperture is arranged to the lowest part of mixer case, the inclined bottom surface setting of mixer case, for described acidic liquid provides water conservancy diversion, the acidic liquid of separating out when the gas of diverse location in mixer is mixed by acidic liquid self gravitation is pooled to release aperture place and discharges, guarantee that acidic liquid does not enter cylinder, make EGR mixer be applicable to use the marine diesel engine of the fuel oil that sulphur content is higher.
Further, EGR gas introducing apparatus comprises EGR gas inlet tube, and one end of EGR gas inlet tube is gas introduction port, and the other end sealing, is provided with a plurality of gas spray orifices on EGR gas inlet tube.
Gas outflow end sealing by EGR gas inlet tube arranges a plurality of gas spray orifices on EGR gas inlet tube, makes EGR gas and fresh air form local flow-disturbing, thereby be conducive to gas, fully mixes.
Further, gas spray orifice axial direction, perpendicular to fresh air flow direction, makes EGR gas vertical with fresh air flow direction, thereby can form stronger local flow-disturbing, thereby be conducive to gas, fully mixes.
Further, EGR gas inlet tube comprises the first straight tube, the second straight tube and 90 ° of bend pipes that connect the first straight tube, the second straight tube, one end that the first straight tube is not connected with 90 ° of bend pipes is gas introduction port, one end sealing that the second straight tube is not connected with 90 ° of bend pipes, gas spray orifice is arranged at the second straight tube.
Adopt said structure, guaranteed that gas spray orifice axial direction is perpendicular to fresh air flow direction.
Further, gas spray orifice is radially uniformly distributed as multiple row along EGR gas inlet tube, further guarantees fully mixing of EGR gas and fresh air.
Further, along the listing of EGR gas inlet tube, gas spray orifice is uniformly distributed, and further guarantees fully mixing of EGR gas and fresh air.
Further, the total sectional area of gas spray orifice be more than or equal to EGR gas inlet tube cross-sectional flow area 80%, if the total sectional area of gas spray orifice is less than normal, can causes that EGR gas pressure raises, thereby cause larger restriction loss, affect the Economy of motor.
Further, EGR gas introducing apparatus also comprises sealed cover, and the mode that EGR gas inlet tube connects by flange is fixed on mixer case, and such structure can integral demounting, is convenient to mixer part and changes, opens and inspect temporarily etc.
Further, one end of mixer case is fresh air intake, and the other end is EGR gas and the mixed gas outlet of fresh air.
Further, EGR gas introducing apparatus is arranged at the position near fresh air intake.
Compared with prior art, the EGR mixer for marine diesel engine provided by the invention has following beneficial effect:
(1) by the lowest part at mixer case, release aperture is set, effectively solved the release And Spread of Solute of the acidic liquid of separating out when high temperature EGR gas mixes with fresh air after charge inter cooling, guarantee that acidic liquid does not enter cylinder, make EGR mixer be applicable to marine diesel engine;
(2) by the gas outflow end sealing of EGR gas inlet tube, a plurality of gas spray orifices that axial direction is vertical with fresh air flow direction are set on EGR gas inlet tube, make EGR gas vertical with fresh air flow direction, thereby can form local flow-disturbing, thereby be conducive to gas, fully mix;
(3) EGR gas introducing apparatus is comprised of sealed cover and EGR gas inlet tube, and it is simple in structure, can integral demounting, thereby is conducive to the replacing of mixer part, open and inspect etc. temporarily.
Accompanying drawing explanation
Fig. 1 is the structural representation of the EGR mixer for marine diesel engine of one embodiment of the present of invention;
Fig. 2 is the sectional view of the EGR mixer for marine diesel engine shown in Fig. 1.
Embodiment
Charge inter cooling technology refers to by turbosupercharger fresh air supercharging is cooling by air cooling device, then through intake manifold, intake valve, flow to combustion chamber of air cylinder.After effectively, refrigeration technique can make supercharging, air temperature drops to below 50 ℃, thereby contributes to reduce the discharge of waste gas and improve fuel economy.
After charge inter cooling, fresh air refers to the fresh air after charge inter cooling is processed.
As shown in Figure 1 and Figure 2, the EGR mixer for marine diesel engine of one embodiment of the present of invention comprises mixer case 1, EGR gas introducing apparatus 2 and release aperture 3.
Release aperture 3 is positioned at mixer case 1 basal surface position lowest part, and it is axially perpendicular to fresh air flow direction after charge inter cooling.
Mixer case 1 bottom surface is with constant slope, and its effect is that the acidic liquid of separating out when the gas of mixer case 1 interior diverse location is mixed by acidic liquid self gravitation is pooled to release aperture 3 places.
The EGR mixer for marine diesel engine in the present embodiment, effectively solved the release And Spread of Solute of the acidic liquid of separating out when high temperature EGR gas mixes with fresh air after charge inter cooling, guarantee that acidic liquid does not enter cylinder, make EGR mixer be applicable to marine diesel engine.
Mixer case 1 one end is fresh air intake 8 after charge inter cooling, and the other end is mixed gas outlet 4.
EGR gas introducing apparatus 2 is comprised of sealed cover 6 and EGR gas inlet tube 9; EGR gas inlet tube one end is EGR gas introduction port 7, the other end sealing, and it is 90 ° of arranged at right angles at mixer cavity volume, is furnished with EGR gas spray orifice 10 a plurality of and that after charge inter cooling, fresh air flow direction is vertical on EGR gas inlet tube.
EGR gas inlet tube 9 is comprised of two sections of straight tubes and one section of 90 ° of bend pipe, should be able to make the flow direction of waste gas from becoming identical with it perpendicular to fresh air flow direction after charge inter cooling.
In the present embodiment, EGR gas introduction port 7 is round structure, and it is radially parallel with mixer horizontal line, be connected with flange, and it is positioned at the mobile upstream side of fresh air after charge inter cooling with upstream components.EGR gas introduction port 7 also can adopt other structures, such as oval structure, rectangular configuration etc.
The mode that EGR gas introducing apparatus 2 connects by flange is fixed on mixer case 1, and this structural design can integral demounting, so that mixer part is changed, opened and inspect etc. temporarily.
In the present embodiment, after charge inter cooling, fresh air intake 8 and mixed gas outlet 4 are rectangle structure, and it is radially vertical with fresh air flow direction after charge inter cooling, with flange, are connected with the suction tude before and after mixer.Fresh air intake 8 and mixed gas outlet 4 also can adopt other structures, such as round structure, ellipsoidal structure etc.
Described EGR gas spray orifice 10 is equally divided into multiple row and is arranged in equably on the end straight length of EGR gas inlet tube 9 along mixer substantially horizontal, along EGR gas inlet tube every row radially, is evenly arranged again a plurality of EGR gas spray orifices.
The total sectional area of gas spray orifice be more than or equal to EGR gas inlet tube cross-sectional flow area 80%, in the present embodiment, the total sectional area of EGR gas spray orifice equates with the cross-sectional flow area of EGR waste gas inlet tube.
EGR gas spray orifice axial direction perpendicular to charge inter cooling after fresh air flow direction.
Working principle of the present invention is: after charge inter cooling, fresh air enters mixer cavity volume 5 by entrance 8.Meanwhile, EGR gas flows into EGR gas inlet tube 9 from EGR gas introduction port 7, first its EGR gas flow direction becomes identical with it from original perpendicular to fresh air flow direction after charge inter cooling, then when flowing through each EGR gas spout 10, again change direction to be ejected into mixer cavity volume perpendicular to fresh air flow direction after charge inter cooling.In mixer cavity volume, after charge inter cooling, fresh air and EGR gas mix, because both flow directions are vertical, thereby thereby can form local flow-disturbing and be conducive to gas and mix, mixed gas will further mix in the cavity volume of downstream, until mix.Finally, the uniform mixed gas of component flows out mixer from mixer outlet 4.When the EGR gas of high temperature and the low temperature fresh air after charge inter cooling mix, can separate out and have corrosive acidic liquid, this part acidic liquid is pooled to release aperture 3 places discharge through the inclined end face of mixer cavity volume.
EGR mixer for marine diesel engine provided by the invention arranges release aperture by the lowest part at mixer case, effectively solved the release And Spread of Solute of the acidic liquid of separating out when high temperature EGR gas mixes with fresh air after charge inter cooling, guarantee that acidic liquid does not enter cylinder, make EGR mixer be applicable to marine diesel engine; By the gas outflow end sealing of EGR gas inlet tube, a plurality of gas spray orifices that axial direction is vertical with fresh air flow direction are set on EGR gas inlet tube, make EGR gas vertical with fresh air flow direction, thereby can form local flow-disturbing, thereby be conducive to gas, fully mix; EGR gas introducing apparatus is comprised of sealed cover and EGR gas inlet tube, and it is simple in structure, can integral demounting, thereby is conducive to the replacing of mixer part, open and inspect etc. temporarily.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art just can design according to the present invention make many modifications and variations without creative work.Therefore, all those skilled in the art, all should be in the determined protection domain by claims under this invention's idea on the basis of existing technology by the available technological scheme of logical analysis, reasoning, or a limited experiment.
Claims (10)
1. the EGR mixer for marine diesel engine, comprise mixer case, EGR gas introducing apparatus and release aperture, described EGR gas introducing apparatus is arranged on described mixer case, it is characterized in that, described release aperture is for discharging the acidic liquid of separating out when high temperature EGR gas mixes with fresh air after charge inter cooling, described release aperture is arranged at the lowest part of described mixer case, and the inclined bottom surface setting of described mixer case, for described acidic liquid provides water conservancy diversion.
2. the EGR mixer for marine diesel engine according to claim 1, described EGR gas introducing apparatus comprises EGR gas inlet tube, one end of described EGR gas inlet tube is gas introduction port, it is characterized in that, the other end sealing, is provided with a plurality of gas spray orifices on described EGR gas inlet tube.
3. the EGR mixer for marine diesel engine according to claim 2, is characterized in that, described gas spray orifice axial direction is perpendicular to described fresh air flow direction.
4. the EGR mixer for marine diesel engine according to claim 3, it is characterized in that, 90 ° of bend pipes that described EGR gas inlet tube comprises the first straight tube, the second straight tube and connects described the first straight tube, described the second straight tube, described the first straight tube is not described gas introduction port with one end that described 90 ° of bend pipes are connected, one end sealing that described the second straight tube is not connected with described 90 ° of bend pipes, described gas spray orifice is arranged at described the second straight tube.
5. the EGR mixer for marine diesel engine according to claim 2, is characterized in that, described gas spray orifice is radially uniformly distributed as multiple row along described EGR gas inlet tube.
6. the EGR mixer for marine diesel engine according to claim 5, is characterized in that, described in described EGR gas inlet tube, is listing, and described gas spray orifice is uniformly distributed.
7. the EGR mixer for marine diesel engine according to claim 2, is characterized in that, the total sectional area of described gas spray orifice be more than or equal to described EGR gas inlet tube cross-sectional flow area 80%.
8. the EGR mixer for marine diesel engine according to claim 1, is characterized in that, described EGR gas introducing apparatus also comprises sealed cover.
9. the EGR mixer for marine diesel engine according to claim 1, is characterized in that, one end of described mixer case is described fresh air intake, and the other end is described EGR gas and the mixed gas outlet of described fresh air.
10. the EGR mixer for marine diesel engine according to claim 9, is characterized in that, described EGR gas introducing apparatus is arranged at the position near described fresh air intake.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410253160.7A CN104005886A (en) | 2014-06-09 | 2014-06-09 | EGR (Exhaust Gas Recirculation) mixer for marine diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410253160.7A CN104005886A (en) | 2014-06-09 | 2014-06-09 | EGR (Exhaust Gas Recirculation) mixer for marine diesel engine |
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| Publication Number | Publication Date |
|---|---|
| CN104005886A true CN104005886A (en) | 2014-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410253160.7A Pending CN104005886A (en) | 2014-06-09 | 2014-06-09 | EGR (Exhaust Gas Recirculation) mixer for marine diesel engine |
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| CN (1) | CN104005886A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114216A (en) * | 2015-08-25 | 2015-12-02 | 江西五十铃发动机有限公司 | Exhaust gas mixer structure for EGR |
| CN108167091A (en) * | 2017-12-25 | 2018-06-15 | 潍柴动力股份有限公司 | Gas recirculation system mixing arrangement and automobile |
| CN109083771A (en) * | 2018-10-09 | 2018-12-25 | 广西玉柴机器股份有限公司 | EGR mixer system |
| US11506153B2 (en) | 2021-03-25 | 2022-11-22 | Ford Global Technologies, Llc | EGR pre-mixer for improved mixing |
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| US20040079079A1 (en) * | 2002-10-23 | 2004-04-29 | Martin Steven P. | Charge air condensation collection system for engines with exhaust gas recirculation |
| JP2010101191A (en) * | 2008-10-21 | 2010-05-06 | Hino Motors Ltd | Egr gas mixing device |
| JP2012007510A (en) * | 2010-06-23 | 2012-01-12 | Hino Motors Ltd | Egr gas mixing device |
| JP2012188944A (en) * | 2011-03-09 | 2012-10-04 | Hino Motors Ltd | Egr device |
| CN203214196U (en) * | 2013-01-29 | 2013-09-25 | 内蒙古欧意德发动机有限公司 | EGR system intake manifold |
| CN203867734U (en) * | 2014-06-09 | 2014-10-08 | 中国船舶重工集团公司第七一一研究所 | EGR mixer for marine diesel engine |
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2014
- 2014-06-09 CN CN201410253160.7A patent/CN104005886A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040079079A1 (en) * | 2002-10-23 | 2004-04-29 | Martin Steven P. | Charge air condensation collection system for engines with exhaust gas recirculation |
| JP2010101191A (en) * | 2008-10-21 | 2010-05-06 | Hino Motors Ltd | Egr gas mixing device |
| JP2012007510A (en) * | 2010-06-23 | 2012-01-12 | Hino Motors Ltd | Egr gas mixing device |
| JP2012188944A (en) * | 2011-03-09 | 2012-10-04 | Hino Motors Ltd | Egr device |
| CN203214196U (en) * | 2013-01-29 | 2013-09-25 | 内蒙古欧意德发动机有限公司 | EGR system intake manifold |
| CN203867734U (en) * | 2014-06-09 | 2014-10-08 | 中国船舶重工集团公司第七一一研究所 | EGR mixer for marine diesel engine |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114216A (en) * | 2015-08-25 | 2015-12-02 | 江西五十铃发动机有限公司 | Exhaust gas mixer structure for EGR |
| CN108167091A (en) * | 2017-12-25 | 2018-06-15 | 潍柴动力股份有限公司 | Gas recirculation system mixing arrangement and automobile |
| CN109083771A (en) * | 2018-10-09 | 2018-12-25 | 广西玉柴机器股份有限公司 | EGR mixer system |
| US11506153B2 (en) | 2021-03-25 | 2022-11-22 | Ford Global Technologies, Llc | EGR pre-mixer for improved mixing |
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Application publication date: 20140827 |