WO2018190450A1 - Refroidisseur de rge muni d'un déflecteur pour supporter des tubes de gaz - Google Patents

Refroidisseur de rge muni d'un déflecteur pour supporter des tubes de gaz Download PDF

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Publication number
WO2018190450A1
WO2018190450A1 PCT/KR2017/004194 KR2017004194W WO2018190450A1 WO 2018190450 A1 WO2018190450 A1 WO 2018190450A1 KR 2017004194 W KR2017004194 W KR 2017004194W WO 2018190450 A1 WO2018190450 A1 WO 2018190450A1
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WO
WIPO (PCT)
Prior art keywords
gas
gas tube
gas tubes
body cell
tube
Prior art date
Application number
PCT/KR2017/004194
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English (en)
Korean (ko)
Inventor
조형근
Original Assignee
주식회사 코렌스
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Publication date
Application filed by 주식회사 코렌스 filed Critical 주식회사 코렌스
Publication of WO2018190450A1 publication Critical patent/WO2018190450A1/fr

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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/007—Auxiliary supports for elements
    • F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies

Definitions

  • the present invention relates to an EG cooler for cooling exhaust gas flowing into an exhaust gas recirculation system (EGR: Exhaust gas hereinafter) with cooling water. It relates to an EG cooler having a baffle spaced apart.
  • EGR exhaust gas recirculation system
  • Exhaust Gas Recirculation is a system in which a part of the exhaust gas is recycled back to the intake system to increase the concentration of CO 2 in the intake air, thereby lowering the temperature of the combustion chamber and thereby reducing the NOx.
  • the mechanism of NOx generation in detail, consists of about 79% nitrogen, 21% oxygen and other trace elements.
  • nitrogen and oxygen do not react with each other, but at high temperature (above about 1450 ° C), they react with each other to form nitrogen oxides (thermal NOx).
  • thermal NOx nitrogen oxides
  • diesel engines generate combustion by compression ignition method, and the compression ratio is getting higher due to the development of the material of the cylinder, thereby increasing the temperature of the combustion chamber.
  • Increasing the combustion chamber temperature increases the efficiency of the thermodynamic engine, but a large amount of nitrogen oxides are generated due to the high temperature.
  • These nitrogen oxides are the main harmful substances that destroy the global environment, causing acid rain, optical smog, respiratory disorders, and the like.
  • the principle of NOx reduction by EZR is to lower the maximum temperature of the combustion chamber by recirculating inert gas (steam, carbon dioxide, etc.), second, to prevent the atmosphere of nitrogen oxide formation by lean combustion, and To reduce the ignition delay and lower the local maximum temperature and pressure in the combustion chamber.
  • inert gas steam, carbon dioxide, etc.
  • EGR the NOx reduction mechanism by EGR has been reported that the reduction of the oxygen concentration is the root cause and the study that the flame temperature decrease is the cause. At this time, no conclusion about which is right is given, but the contribution of NOx reduction in oxygen concentration and flame temperature has recently been reported to be at the same level.
  • EZR is equipped with EZR cooler, which reduces NOx without increasing fuel economy and PM due to stricter diesel emission control, and installs a cooler (cooler) using coolant from the engine. It is a device that can be obtained.
  • the EZR cooler should be cooled to 700 °C to 200 °C, so it must be heat-resistant and must be compactly designed to be installed inside the car. Should be minimized, and condensation is generated from exhaust gas during heat exchange and sulfuric acid is included in the condensate because it is susceptible to corrosion. Since particulate matter (PM) of the exhaust gas can block the inside of the passage, countermeasure against fouling is required.
  • PM particulate matter
  • Figure 1 is a vertical cross-sectional view of a conventional EG cooler
  • Figure 2 is a perspective view of a gas tube included in a conventional EZ cooler.
  • an EZR cooler in general, includes a body cell 10 through which coolant flows in and out, and a plurality of gas tubes 20 installed in the body cell 10 through which exhaust gas flows.
  • a plurality of tube protrusions 22 are formed in the gas tube 20, and two neighboring gas tubes 20 are disposed such that the ends of the respective tube protrusions 22 abut each other. Cooling water may flow between the tubes 20.
  • the gas tube 20 is produced by welding one end by rolling one metal plate, because a plurality of tube projections must be formed on a wide surface (top and bottom surfaces of FIG. 2) of the gas tube 20.
  • the line is located on the narrow side of the gas tube 20 (left side or right side in FIG. 2).
  • the high temperature and high pressure exhaust gas flows inside the gas tube 20, and the pressure of the exhaust gas is mainly applied to the wide surface of the gas tube 20, so that the welding line has a narrow surface of the gas tube 20 as described above. If formed in the can cause problems such as the welding line is opened.
  • the present invention has been proposed to solve the above problems, it is possible to maintain a constant distance between the gas tubes even if the tube projection is not formed in the gas tube, it is possible to freely select the welding line position of the gas tube
  • the purpose of the present invention is to increase the pressure resistance of the gas tube and to provide an EG cooler that can improve the corrosion resistance of the gas tube.
  • the body cell to which the coolant flows out A plurality of gas tubes arranged in the thickness direction and mounted in the body cell; A plurality of main bars extending in the stacking direction of the plurality of gas tubes and closely contacted to one side of the plurality of gas tubes in a width direction, and inserted between two neighboring gas tubes extending from the main bar in the width direction of the gas tube; And a baffle configured as an extension bar, wherein the plurality of gas tubes are spaced apart from each other by the thickness of the extension bar.
  • the gas tube is formed in a rectangular tube shape having a width wider than a thickness by bending one metal plate and then welding both ends, and a welding line is formed at an upper wall center or a lower wall center.
  • the outermost extension bar of the plurality of extension bars is inserted between the outermost gas tube and the inner surface of the body cell, the outermost gas tube and the inner surface of the body cell is the extension Spaced apart by the thickness of the bar.
  • the plurality of extension bars are formed to have the same thickness, and the separation distance between two neighboring gas tubes and the outermost gas tube and the body cell are equally set.
  • the baffle is coupled to the longitudinal stop of the gas tube.
  • the baffles are provided in pairs so as to be coupled to both sides in the width direction of the gas tube.
  • the pair of baffles are coupled to the longitudinal interruption of the gas tube so that the extension bar ends face each other, and the two extension bar ends facing each other are spaced apart so that the coolant flows.
  • One side wall of the body cell is coupled to the cooling water inlet tube and the cooling water outlet tube, the main bar is in close contact between the point where the cooling water inlet tube is coupled and the cooling water outlet tube of the one side wall of the body cell.
  • the EZR cooler according to the present invention can maintain the separation distance between the gas tubes even without forming a tube protrusion in the gas tube, and can freely select the position of the welding line of the gas tube to increase the pressure resistance of the gas tube. It can be increased, and the corrosion resistance of the gas tube can be improved.
  • FIG. 1 is a vertical cross-sectional view of a conventional RG cooler.
  • FIG. 2 is a perspective view of a gas tube included in a conventional EZC cooler.
  • FIG 3 is a perspective view of an EG cooler according to the present invention.
  • FIG. 4 is a cross-sectional perspective view of an EZ cooler according to the present invention.
  • FIG 5 and 6 are a perspective view and an exploded perspective view showing a coupling structure of the support baffle included in the EG cooler according to the present invention.
  • FIG. 7 is a cross-sectional view showing a cooling water flow path of an EG cooler according to the present invention.
  • FIG 8 and 9 are a perspective view and an exploded perspective view showing a coupling structure of the support baffle included in the second embodiment of an EG cooler according to the present invention.
  • Fig. 10 is a cross-sectional view showing the cooling water flow path of the EZC cooler according to the second embodiment of the present invention.
  • Figure 3 is a perspective view of an EG cooler according to the present invention
  • Figure 4 is a cross-sectional perspective view of the EG cooler according to the present invention
  • Figure 5 and Figure 6 is a coupling structure of the support baffle included in the EG cooler according to the present invention Is a perspective view and an exploded perspective view.
  • EZ cooler is a device for heat exchange between the exhaust gas and the cooling water
  • the cooling water inlet pipe 110 and the cooling water outlet pipe 120 is provided with a body cell 100 and the cooling water flows in and out
  • thickness direction A plurality of gas tubes 200 are arranged in a stacked structure to be mounted in the body cell 100, and wave fins 300 mounted in the gas tube 200 are provided as basic components. Even if a separate tube protrusion is not formed in the 200, that is, even though the surface of the gas tube 200 is formed in a smooth flat shape, two neighboring gas tubes 200 are configured to be spaced apart at regular intervals. There is a big feature.
  • the EZR cooler according to the present invention has the biggest feature in that it further includes a baffle 400 which spaces the plurality of gas tubes 200 at regular intervals.
  • the baffle 400 extends long in the stacking direction of the plurality of gas tubes 200 (up and down in this embodiment) to be in close contact with one side of the plurality of gas tubes 200 in the width direction (right side in FIG. 5).
  • the bar 410 and a plurality of extension bars 420 extending from the main bar 410 in the width direction of the gas tube 200 and inserted between two neighboring gas tubes 200.
  • the extension bar 420 inserted between two neighboring gas tubes 200 is in contact with the bottom surface of the gas tube 200 located above and the top surface of the gas tube 200 located below the bar.
  • the gas tube 200 and the gas tube 200 positioned below the gas tube 200 are kept spaced apart by the thickness of the extension bar 420.
  • the wall surface of the gas tubes 200 is planar. Since the exhaust gas flowing inside the gas tube 200 is concentrated on the curved portion around the tube protrusion, the corresponding portion may be easily corroded.
  • the gas tube 200 included in the present invention is a noise generated during the flow of the exhaust gas because the inner surface forms a smooth plane There is an advantage that the vibration is significantly reduced.
  • the gas tube 200 applied to the EZC cooler is formed in a rectangular tube shape having a width wider than the thickness thereof, and is mounted in a stacked structure in the thickness direction.
  • the gas tube 200 is manufactured by welding both ends after bending one metal plate. do.
  • the welding line may be located at any point. That is, the welding line may be formed on the widthwise sidewall of the gas tube 200 (in the present embodiment, the left side wall or the right side wall), and the thickness sidewall of the gas tube 200 (the upper side wall in this embodiment). It may be formed on the lower side wall).
  • the side wall of the gas tube 200 is made wider in the thickness direction than the width side wall, the pressure of the exhaust gas flowing into the gas tube 200 is mainly applied in the vertical direction. Therefore, when the welding line of the gas tube 200 is formed on the side wall in the width direction of the gas tube 200, there is an increased risk of the welding line being opened by the pressure of the exhaust gas. Is preferably formed in the center of the upper side wall or the lower side wall.
  • the gas tube 200 When the welding line of the gas tube 200 is formed in the center of the upper wall or the lower wall of the gas tube 200 as described above, even if the pressure of the exhaust gas is large, the welding line does not easily open, and accordingly, the gas tube 200 The effect of increasing the structural strength of can be obtained.
  • the gas tube 200 generally has a widthwise sidewall (left or right wall) narrower than the thickness sidewall (upper or lower wall) as mentioned above, and thus, the conventional gas tube 200 (20). There may be many difficulties in welding in the widthwise side wall. On the other hand, when welding from the side wall in the thickness direction, such as the gas tube 200 included in the present invention, it is possible to obtain an advantage that the welding operation becomes very easy.
  • the heat exchange rate of each gas tube 200 increases and decreases in proportion to the amount of cooling water flowing outside.
  • the heat exchange rate of each gas tube 200 to be the same, that is, the flow rate of the coolant contacting the gas tube 200 located in the middle and the gas tube 200 is located on the outermost
  • the distance between the adjacent two gas tubes 200 and the outermost gas tube 200 and the body cell 100 are preferably set equally. Do.
  • the extension bar 420 located at the outermost side of the plurality of extension bars 420 is inserted between the gas tube 200 located at the outermost side and the inner surface of the body cell 100, and the gas tube 200 It is preferable that the outer surface and the inner surface of the body cell 100 is set to contact. As described above, when the outermost extension bar 420 is in contact with both the gas tube 200 and the body cell 100, the inner surface of the gas tube 200 and the body cell 100 positioned at the outermost side may be Bars are spaced apart by the thickness of the extension bar 420, all the gas tubes 200 can be obtained the effect that the heat exchange rate is the same.
  • the plurality of extension bars 420 should be manufactured to have the same thickness.
  • FIG. 7 is a cross-sectional view showing a cooling water flow path of an EG cooler according to the present invention.
  • the baffle 400 for maintaining a constant distance between the gas tubes 200 is coupled to one side in the longitudinal direction of the gas tube 200, the other side in the longitudinal direction of the gas tube 200 may not be stably fixed and shaken. There is concern. Therefore, the baffle 400 is preferably coupled to the longitudinal interruption of the gas tube 200 so that both sides of the gas tube 200 can be stably balanced and fixed in the longitudinal direction.
  • the coolant inlet pipe 110 for supplying the coolant into the body cell 100 and the coolant outlet pipe 120 for discharging the coolant in the body cell to the outside are provided on one side wall of the body cell 100.
  • the main bar 410 may be in close contact between a point where the coolant inlet pipe 110 is coupled and a point where the coolant outlet pipe 120 is coupled to one sidewall of the body cell 100.
  • the baffle 400 when the baffle 400 is mounted between the coolant inlet pipe 110 and the coolant outlet pipe 120, the coolant introduced into the body cell 100 through the coolant inlet pipe 110 is illustrated in FIG. 7. As shown in FIG. 7, the baffle 400 flows to a portion (lower region in FIG. 7) and is then U-turned to be discharged through the coolant outlet pipe 120.
  • the coolant introduced into the body cell 100 is
  • the gas tube 200 is in uniform contact with the entire outer surface. Therefore, it is possible to obtain the effect of maximizing the cooling performance of the EG cooler according to the present invention.
  • the baffle 400 may be Both sides corresponding to the inner wall of the body cell 100 should be in close contact with the inner wall of the body cell 100.
  • FIG 8 and 9 are a perspective view and an exploded perspective view showing a coupling structure of the support baffle 400 included in the second embodiment of the easy cooler according to the present invention
  • Figure 10 is a second embodiment of the easy cooler according to the present invention It is sectional drawing which shows the cooling water flow path of an example.
  • the baffles 400 may be provided in pairs and may be coupled to both sides of the gas tube 200 in the width direction. As described above, when a pair of baffles 400 are respectively coupled to both sides of the gas tube 200 in the width direction, the plurality of gas tubes 200 have an advantage that the spacing between the one side and the other side in the width direction can be stably fixed. have.
  • the pair of baffles 400 are coupled to the longitudinal interruption of the gas tube 200 so that the ends of the extension bars 420 face each other, and the ends of the two extension bars 420 facing each other are coolant. It is desirable to be spaced a certain distance to flow.
  • the coolant introduced through the coolant inlet pipe 110 may be coupled to the opposite side of the coolant inlet pipe 110.
  • the fluid flows to the bottom end and passes between two extension bars 420 after U-turn.
  • Some of the coolant passing between the two extension bars 420 is immediately discharged to the outside through the cooling water outlet, the rest of the coolant passing between the two extension bars 420 flows to the lower side and then again U-turn (U- Bar is discharged through the coolant outlet pipe 120, the coolant introduced into the body cell 100 may be evenly contacted over the entire outer surface of the gas tube (200).
  • baffles 400 are provided in pairs as shown in this embodiment, all sides of the baffle 400 corresponding to the inner wall of the body cell 100 closely adhere to the inner wall of the body cell 100. Should be.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

La présente invention concerne un refroidisseur de RGE comprenant : une cellule de corps dans laquelle circule de l'eau de refroidissement ; une pluralité de tubes de gaz disposés en réseau dans une structure empilée dans le sens de l'épaisseur et montés à l'intérieur de la cellule de corps ; et un déflecteur comprenant une barre principale, qui est allongé dans la direction de l'empilement de la pluralité de tubes de gaz et vient en contact étroit avec un côté latéral dans le sens de la largeur de la pluralité de tubes de gaz, et une pluralité de barres d'extension qui s'étendent depuis la barre principale dans le sens de la largeur des tubes de gaz et qui sont insérées entre deux tubes de gaz voisins. La pluralité de tubes de gaz sont positionnés à un écart les uns des autres égal à l'épaisseur des barres d'extension. Le refroidisseur de RGE selon la présente invention permet aux tubes de gaz d'être maintenus espacés les uns des autres à une distance fixe sans former une saillie de tube sur les tubes de gaz, permet de sélectionner librement la position d'une ligne de soudage des tubes de gaz et permet ainsi une augmentation de la résistance à la pression interne des tubes de gaz et une amélioration de la résistance à la corrosion des tubes de gaz.
PCT/KR2017/004194 2017-04-14 2017-04-19 Refroidisseur de rge muni d'un déflecteur pour supporter des tubes de gaz WO2018190450A1 (fr)

Applications Claiming Priority (2)

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KR1020170048457A KR101977894B1 (ko) 2017-04-14 2017-04-14 가스튜브 지지용 배플을 구비하는 이지알 쿨러
KR10-2017-0048457 2017-04-14

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113039403A (zh) * 2018-11-14 2021-06-25 翰昂汽车零部件有限公司 热交换器
US11885286B2 (en) 2021-04-09 2024-01-30 Caterpillar Inc. Separator plate for cooling tubes

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020101152A1 (fr) * 2018-11-14 2020-05-22 한온시스템 주식회사 Échangeur de chaleur

Citations (5)

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Publication number Priority date Publication date Assignee Title
JP2005172262A (ja) * 2003-12-08 2005-06-30 Toyo Radiator Co Ltd 熱交換器
KR100748756B1 (ko) * 2006-05-11 2007-08-13 현대자동차주식회사 차량용 ｅｇｒ 장치의 ｅｇｒ 쿨러
US20080236792A1 (en) * 2007-03-28 2008-10-02 Modine Manufacturing Company Heat exchanger and method
US20150260466A1 (en) * 2012-10-25 2015-09-17 Borgwarner Inc. Flow Deflector
EP3029407A1 (fr) * 2014-12-02 2016-06-08 Borgwarner Emissions Systems Spain, S.L.U. Déflecteur rainuré pour un échangeur de chaleur

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101298382B1 (ko) * 2006-07-03 2013-08-20 모다인 매뉴팩츄어링 컴파니 Ｅｇｒ 쿨러
KR100823654B1 (ko) 2007-10-02 2008-04-21 주식회사 코렌스 이지알 쿨러
KR20150026006A (ko) * 2013-08-30 2015-03-11 한국델파이주식회사 그루브를 포함하는 열교환기용 튜브 및 그 제작 방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005172262A (ja) * 2003-12-08 2005-06-30 Toyo Radiator Co Ltd 熱交換器
KR100748756B1 (ko) * 2006-05-11 2007-08-13 현대자동차주식회사 차량용 ｅｇｒ 장치의 ｅｇｒ 쿨러
US20080236792A1 (en) * 2007-03-28 2008-10-02 Modine Manufacturing Company Heat exchanger and method
US20150260466A1 (en) * 2012-10-25 2015-09-17 Borgwarner Inc. Flow Deflector
EP3029407A1 (fr) * 2014-12-02 2016-06-08 Borgwarner Emissions Systems Spain, S.L.U. Déflecteur rainuré pour un échangeur de chaleur

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113039403A (zh) * 2018-11-14 2021-06-25 翰昂汽车零部件有限公司 热交换器
CN113039403B (zh) * 2018-11-14 2023-05-16 翰昂汽车零部件有限公司 热交换器
US11885286B2 (en) 2021-04-09 2024-01-30 Caterpillar Inc. Separator plate for cooling tubes

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Publication number Publication date
KR20180116498A (ko) 2018-10-25
KR101977894B1 (ko) 2019-05-14

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