JP2000292089A - Structure of exhaust cooler - Google Patents
Structure of exhaust coolerInfo
- Publication number
- JP2000292089A JP2000292089A JP11099155A JP9915599A JP2000292089A JP 2000292089 A JP2000292089 A JP 2000292089A JP 11099155 A JP11099155 A JP 11099155A JP 9915599 A JP9915599 A JP 9915599A JP 2000292089 A JP2000292089 A JP 2000292089A
- Authority
- JP
- Japan
- Prior art keywords
- cooling water
- heat transfer
- shell
- cooler
- exhaust gas
- 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.)
- Granted
Links
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
Landscapes
- Exhaust-Gas Circulating Devices (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、複数の伝熱管を筒
状のクーラシェル内にその軸線に平行に設け、それらの
伝熱管内部に排気ガスを、伝熱管外部に冷却水をそれぞ
れ流れるように構成し、内燃機関の排気還流装置に介装
した排気ガス冷却器（以下、ＥＧＲクーラという）の構
造に関し、特に、クーラシェル内の冷却水路に設けたバ
ッフル板の構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a plurality of heat transfer tubes provided in a cylindrical cooler shell in parallel with the axis thereof so that exhaust gas flows inside the heat transfer tubes and cooling water flows outside the heat transfer tubes. The present invention relates to a structure of an exhaust gas cooler (hereinafter, referred to as an EGR cooler) interposed in an exhaust gas recirculation device of an internal combustion engine, and particularly to a structure of a baffle plate provided in a cooling water passage in a cooler shell.
【０００２】[0002]
【従来の技術】従来の内燃機関の排気還流装置（ＥＧ
Ｒ）に用いられるＥＧＲクーラは、図１８に示すように
筒状のクーラシェル１がほぼ水平に配設され、その内部
に複数本の伝熱管４が軸線に平行に設けられており、そ
の両端部には排気ガスＧの出入口２、２が設けられて伝
熱管４内を排気ガスＧが流れている。また、クーラシェ
ル１の一端の下方位置には冷却水入口５が、対向する他
端の上方位置には冷却水出口６がそれぞれ設けられ、伝
熱管４の外部を冷却水Ｗが流れて内部の排気ガスＧと熱
交換を行い、排気ガスＧを冷却するように構成されてい
る。2. Description of the Related Art A conventional exhaust gas recirculation system (EG) for an internal combustion engine is used.
As shown in FIG. 18, the EGR cooler used in (R) has a cylindrical cooler shell 1 disposed substantially horizontally, and a plurality of heat transfer tubes 4 provided therein in parallel with the axis. Portions of the exhaust gas G are provided in the section, and the exhaust gas G flows through the heat transfer tube 4. A cooling water inlet 5 is provided at a position below one end of the cooler shell 1, and a cooling water outlet 6 is provided at a position above the other end of the cooling shell 1. It is configured to exchange heat with the exhaust gas G and cool the exhaust gas G.
【０００３】このように構成されたＥＧＲクーラにおい
ては、伝熱管４はその両端部を図示しない支持板に固着
されて支持されており、熱応力あるいは振動によって亀
裂の発生等による破損故障のおそれがあった。In the EGR cooler thus configured, the heat transfer tubes 4 are fixed at both ends to a support plate (not shown) and supported, and there is a possibility that the heat transfer tubes 4 may be broken due to cracks or the like due to thermal stress or vibration. there were.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、熱応力ある
いは振動等による破損が防止でき、かつ冷却効率を向上
したＥＧＲクーラを提供することを目的としている。SUMMARY OF THE INVENTION An object of the present invention is to provide an EGR cooler which can prevent breakage due to thermal stress or vibration and has improved cooling efficiency.
【０００５】[0005]
【課題を解決するための手段】本発明によれば、複数の
伝熱管を筒状のクーラシェル内にその軸線に平行に設
け、それらの伝熱管内部に排気ガスを、伝熱管外部に冷
却水をそれぞれ流れるように構成し、内燃機関の排気還
流装置に介装した排気ガス冷却器の構造において、クー
ラシェルの軸線が水平に近いように配設し、そのシェル
の一端近くの下方位置に冷却水入口を、対向する他端近
くの上方位置に冷却水出口をそれぞれ配設し、シェル内
の冷却水流路に半円形状をしており且つ半円形状の欠け
た部分を冷却水通路としているバッフル板を複数枚設
け、それらのバッフル板は冷却水入口寄りでは通路部分
が上方に、冷却水出口寄りでは通路部分が下方になるよ
うにしその間は順次回転して配設し冷却水が螺旋状に流
れるように構成している。According to the present invention, a plurality of heat transfer tubes are provided in a cylindrical cooler shell in parallel with the axis thereof, and exhaust gas is provided inside the heat transfer tubes and cooling water is provided outside the heat transfer tubes. In the structure of the exhaust gas cooler interposed in the exhaust gas recirculation device of the internal combustion engine, the cooler shell is arranged so that its axis is nearly horizontal, and the cooling is performed at a lower position near one end of the shell. A cooling water outlet is arranged at an upper position near the other end facing the water inlet, and a cooling water passage in the shell has a semicircular shape, and a part lacking the semicircular shape is a cooling water passage. A plurality of baffle plates are provided, and the baffle plates are arranged such that the passage portion is upward near the cooling water inlet and the passage portion is downward near the cooling water outlet. Is configured to flow to .
【０００６】また、本発明によれば、複数の伝熱管を筒
状のクーラシェル内にその軸線に平行に設け、それらの
伝熱管内部に排気ガスを、伝熱管外部に冷却水をそれぞ
れ流れるように構成し、内燃機関の排気還流装置に介装
した排気ガス冷却器の構造において、クーラシェルの軸
線が水平に近いように配設し、そのシェルの一端近くの
下方位置に冷却水入口を、対向する他端近くの上方位置
に冷却水出口をそれぞれ配設し、シェル内の冷却水流路
に半円形状をしており且つ半円形状の欠けた部分を冷却
水通路としているバッフル板を複数枚設け、それらのバ
ッフル板は冷却水入口寄りでは通路部分が上方に、冷却
水出口寄りでは通路部分が下方になるようにしその間は
交互に配設して冷却水が上下方向に波状に流れるように
構成している。Further, according to the present invention, a plurality of heat transfer tubes are provided in a cylindrical cooler shell in parallel with the axis thereof so that exhaust gas flows inside the heat transfer tubes and cooling water flows outside the heat transfer tubes. In the structure of the exhaust gas cooler interposed in the exhaust gas recirculation device of the internal combustion engine, the cooler shell is disposed so that the axis is nearly horizontal, and a cooling water inlet is provided at a lower position near one end of the shell. A plurality of baffle plates, each having a cooling water outlet disposed at an upper position near the other end opposite thereto and having a cooling water passage in the shell having a semicircular shape and having a semicircular chipped portion as a cooling water passage, are provided. The baffle plates are arranged such that the passage portion is upward near the cooling water inlet and the passage portion is downward near the cooling water outlet so that the cooling water flows in a wavy manner in the vertical direction. It is composed.
【０００７】そして、本発明によれば、複数の伝熱管を
筒状のクーラシェル内にその軸線に平行に設け、それら
の伝熱管内部に排気ガスを、伝熱管外部に冷却水をそれ
ぞれ流れるように構成し、内燃機関の排気還流装置に介
装した排気ガス冷却器の構造において、クーラシェルの
軸線が水平に近いように配設し、そのシェルの一端近く
の下方位置に冷却水入口を、対向する他端近くの上方位
置に冷却水出口をそれぞれ配設し、シェル内の冷却水流
路に冷却水の通路部分を有する複数枚のバッフル板を設
け、それらのバッフル板はその通路部分が上下方向に交
互に配設されており、かつ各バッフル板には中央段の伝
熱管が支持されている。According to the present invention, a plurality of heat transfer tubes are provided in a cylindrical cooler shell in parallel to the axis thereof, so that exhaust gas flows inside the heat transfer tubes and cooling water flows outside the heat transfer tubes. In the structure of the exhaust gas cooler interposed in the exhaust gas recirculation device of the internal combustion engine, the cooler shell is disposed so that the axis is nearly horizontal, and a cooling water inlet is provided at a lower position near one end of the shell. Cooling water outlets are respectively arranged at upper positions near the other end facing each other, and a plurality of baffle plates having a cooling water passage portion are provided in a cooling water flow passage in the shell, and the baffle plates have upper and lower passage portions. The heat exchanger tubes are arranged alternately in the direction, and each baffle plate supports a central heat transfer tube.
【０００８】そして、前記バッフル板は円形状の一部が
切り欠かれて冷却水の通路部分が形成され、その通路部
分は中央部分から偏奇した領域に設けられ、前記中央部
分は伝熱管を支持している。The baffle plate is formed by cutting out a part of a circular shape to form a passage portion for cooling water, the passage portion is provided in a region deviated from a central portion, and the central portion supports a heat transfer tube. are doing.
【０００９】また、複数の伝熱管を筒状のクーラシェル
内にその軸線に平行に設け、それらの伝熱管内部に排気
ガスを、伝熱管外部に冷却水をそれぞれ流れるように構
成し、内燃機関の排気還流装置に介装した排気ガス冷却
器の構造において、クーラシェルの軸線が水平に近いよ
うに配設し、そのシェルの一端近くの下方位置に冷却水
入口を、対向する他端近くの上方位置に冷却水出口をそ
れぞれ配設し、シェル内の冷却水流路に冷却水の通路部
分を有する複数枚のバッフル板を設け、それらのバッフ
ル板はその通路部分が上下方向に交互に配設されてお
り、そのバッフル板は円形状の周囲を有し、中央部分か
ら偏奇した領域に孔を穿設して冷却水の通路部分が形成
され、前記中央部分は伝熱管を支持している。A plurality of heat transfer tubes are provided in a cylindrical cooler shell in parallel to the axis thereof, and exhaust gas flows inside the heat transfer tubes and cooling water flows outside the heat transfer tubes, respectively. In the structure of the exhaust gas cooler interposed in the exhaust gas recirculation device, the axis of the cooler shell is disposed so as to be nearly horizontal, and a cooling water inlet is provided at a lower position near one end of the shell, and near the opposite other end. A cooling water outlet is provided at an upper position, and a plurality of baffle plates having a cooling water passage portion are provided in a cooling water flow passage in a shell, and the baffle plates are arranged alternately in a vertical direction. The baffle plate has a circular periphery, and a hole is formed in a region deviated from the central portion to form a cooling water passage portion, and the central portion supports the heat transfer tube.
【００１０】また、前記バッフル板の位置がクーラシェ
ルの軸線方向に対し不等間隔に配設されている。[0010] The positions of the baffle plates are arranged at unequal intervals in the axial direction of the cooler shell.
【００１１】また、前記伝熱管はクーラシェル内の上部
及び下部から距離をおいて配設され、各伝熱管がバッフ
ル板に貫通支持されている。Further, the heat transfer tubes are arranged at a distance from the upper and lower portions in the cooler shell, and each heat transfer tube is supported by passing through a baffle plate.
【００１２】また、本発明によれば、複数の伝熱管を筒
状のクーラシェル内にその軸線に平行に設け、それらの
伝熱管内部に排気ガスを、伝熱管外部に冷却水をそれぞ
れ流れるように構成し、内燃機関の排気還流装置に介装
した排気ガス冷却器の構造において、クーラシェルの軸
線が水平に近いように配設し、そのシェルの一端近くの
下方位置に冷却水入口を、対向する他端近くの上方位置
に冷却水出口をそれぞれ配設し、シェル内の冷却水流路
に複数枚の冷却水の通路部分を有するバッフル板を設
け、それらのバッフル板はシェル内周に沿った円環状に
形成され、外周部の伝熱管がそのバッフル板に貫通支持
されている。Further, according to the present invention, a plurality of heat transfer tubes are provided in a cylindrical cooler shell in parallel with its axis so that exhaust gas flows inside the heat transfer tubes and cooling water flows outside the heat transfer tubes. In the structure of the exhaust gas cooler interposed in the exhaust gas recirculation device of the internal combustion engine, the cooler shell is disposed so that the axis is nearly horizontal, and a cooling water inlet is provided at a lower position near one end of the shell. Cooling water outlets are respectively arranged at upper positions near the other end facing each other, and baffle plates having a plurality of cooling water passage portions are provided in a cooling water flow path in the shell, and the baffle plates are arranged along the inner periphery of the shell. The heat transfer tube on the outer peripheral portion is penetrated and supported by the baffle plate.
【００１３】また、本発明によれば、複数の伝熱管を筒
状のクーラシェル内にその軸線に平行に設け、それらの
伝熱管内部に排気ガスを、伝熱管外部に冷却水をそれぞ
れ流れるように構成し、内燃機関の排気還流装置に介装
した排気ガス冷却器の構造において、シェル内の冷却水
流路に複数枚の冷却水の通路部分を有するバッフル板を
設け、該バッフル板には連続する不定形な溝が形成され
ており、該溝は円形断面部分と長方形断面部分とからな
り、前記伝熱管は前記溝の円形断面部分により支持され
ており、長方形断面部分は円形断面部分間を接続し且つ
冷却水通路として作用するように構成されている。Further, according to the present invention, a plurality of heat transfer tubes are provided in a cylindrical cooler shell in parallel with the axis thereof so that exhaust gas flows inside the heat transfer tubes and cooling water flows outside the heat transfer tubes. In the structure of the exhaust gas cooler interposed in the exhaust gas recirculation device of the internal combustion engine, a baffle plate having a plurality of cooling water passage portions is provided in a cooling water passage in the shell, and the baffle plate is continuously connected to the baffle plate. The groove is composed of a circular cross-section and a rectangular cross-section, the heat transfer tube is supported by the circular cross-section of the groove, and the rectangular cross-section has a circular cross-section. It is configured to connect and act as a cooling water passage.
【００１４】また、前記バッフル板の円周部外縁を折り
曲げ、クーラシェル内周に固着している。The outer peripheral edge of the baffle plate is bent and fixed to the inner periphery of the cooler shell.
【００１５】また、前記バッフル板を貫通する伝熱管を
バッフル板にかしめによって固着している。Further, a heat transfer tube passing through the baffle plate is fixed to the baffle plate by caulking.
【００１６】そして、前記伝熱管外部の冷却水の流れ方
向を伝熱管内部の排気ガスの流れと同方向になるように
冷却水入口及び出口を配設している。The cooling water inlet and outlet are arranged such that the flow direction of the cooling water outside the heat transfer tube is the same as the flow direction of the exhaust gas inside the heat transfer tube.
【００１７】[0017]
【発明の実施の形態】以下、図面を参照して本発明の実
施形態を説明する。なお、前記［従来の技術］項で説明
した図１８に示す構成部品と同じ部品には同じ符号を付
し、重複した説明は省略する。図１に示すように第１の
実施形態は、クーラシェル１内の冷却水流路１ａに（図
には、伝熱管４は省略してある）、３枚の半円形状のバ
ッフル板９が設けられており、各バッフル板９には伝熱
管４の一部が貫通し、半円形状の欠けた部分は冷却水通
路Ａとしている。それらのバッフル板９は冷却水入口５
寄りの第１のバッフル板９ａは下方に、中間の第２のバ
ッフル板９ｂは９０°回転した方向に、出口寄りの第３
のバッフル板９ｃは上方にそれぞれ配設され、通路Ａに
より冷却水Ｗが螺旋状に流れるように構成されている。
なお、バッフル板９の符号Ｂで示す切欠きは、エア抜き
および水路隅部の淀みを防止するためのものであり、各
バッフル板９ａ〜９ｃは同一輪郭形状である。そして、
冷却水入口５に対向するシェル１上面には、小孔径のエ
ア抜き口８が設けられ、シェル１内の上部に溜まったエ
アが抜けるようになっている。Embodiments of the present invention will be described below with reference to the drawings. Note that the same components as those shown in FIG. 18 described in the section of [Prior Art] are denoted by the same reference numerals, and redundant description will be omitted. As shown in FIG. 1, in the first embodiment, three semicircular baffle plates 9 are provided in a cooling water flow path 1a in a cooler shell 1 (a heat transfer tube 4 is omitted in the figure). A part of the heat transfer tube 4 penetrates through each of the baffle plates 9, and a semicircular chipped portion is a cooling water passage A. These baffle plates 9 are
The first baffle plate 9a closer to the outlet is downward, and the second baffle plate 9b in the middle is in the direction rotated by 90 °.
The baffle plates 9c are disposed above, and are configured so that the cooling water W flows spirally through the passage A.
The notch B of the baffle plate 9 is for preventing air bleeding and preventing stagnation at the corner of the channel, and the baffle plates 9a to 9c have the same contour. And
On the upper surface of the shell 1 facing the cooling water inlet 5, an air vent 8 having a small hole diameter is provided, so that air accumulated in the upper part in the shell 1 can escape.
【００１８】また、図２に示す第２の実施形態では、ク
ーラシェル１内の冷却水流路１ａに４枚の半円形状のバ
ッフル板９が設けられている。それらのバッフル板９は
冷却水入口５寄りでは半円形部分が下方に、冷却水出口
６寄りでは半円形部分が上方になるように配設され、そ
の間には交互に配設されて冷却水Ｗが上下方向に波状に
流れるように構成されている。In the second embodiment shown in FIG. 2, four semicircular baffle plates 9 are provided in the cooling water flow path 1a in the cooler shell 1. The baffle plates 9 are arranged such that the semicircular portion is located closer to the cooling water inlet 5 and the semicircular portion is located closer to the cooling water outlet 6, and the cooling water W is alternately arranged therebetween. Are configured to flow in a wavy manner in the vertical direction.
【００１９】図３および図４に示す第３の実施形態で
は、シェル１内に複数枚（図示例では２枚）配設された
バッフル板９Ａは、図４のように中央部分から偏奇した
上方（反対向きに配設された場合は下方）部分Ｃが冷却
水通路として切り欠かれている。なお、符号Ｄは、エア
抜きおよび淀み防止の切り欠きである。このバッフル板
９Ａは、中央部分から偏奇した部分Ｃに冷却水の通路部
分が形成されているので中央段の伝熱管４ａがバッフル
板９Ａで支持されている。前記図１や図２に示した半円
形状では、上向き、下向きの場合共、中央段の伝熱管４
ａを支持することができず、そのスパンがシェル１の全
長になるという問題点があったが、実施形態では各バッ
フル板９Ａで支持でき、スパンを短くできる。In the third embodiment shown in FIGS. 3 and 4, a plurality (two in the illustrated example) of baffle plates 9A disposed in the shell 1 are arranged above the central part of the baffle plate 9A as shown in FIG. Portion C is cut off as a cooling water passage (lower when disposed in the opposite direction). Symbol D is a notch for air bleeding and stagnation prevention. In the baffle plate 9A, a cooling water passage portion is formed in a portion C deviated from the center portion, so that the heat transfer tube 4a at the center stage is supported by the baffle plate 9A. In the semicircular shape shown in FIGS. 1 and 2, the heat transfer tube 4 at the center stage
Although there was a problem that a could not be supported and the span became the entire length of the shell 1, in the embodiment, each baffle plate 9A can support it, and the span can be shortened.
【００２０】図５〜図７に示す第４の実施形態では、バ
ッフル板９Ｂが前記実施形態同様に中央段の伝熱管４ａ
を支持するように形成されたもので、外周が円形状に形
成され、冷却水通路は中央部分から偏奇した領域に孔Ｅ
として穿設されている。また、その孔Ｅの対向位置にエ
ア抜きまたは淀み防止用の孔Ｆが設けられている。この
バッフル板９Ｂでは、全周をシェル１に鑞付け固着する
ことができる。In the fourth embodiment shown in FIGS. 5 to 7, the baffle plate 9B is connected to the central heat transfer tube 4a similarly to the above embodiment.
The cooling water passage has a hole E in a region deviated from the central portion.
It is drilled as. Further, a hole F for venting air or preventing stagnation is provided at a position facing the hole E. In this baffle plate 9B, the entire circumference can be fixed to the shell 1 by brazing.
【００２１】図８に示す第５の実施形態では、バッフル
板９Ａ（または９Ｂ）の位置がシェル１の軸線方向に対
して不等間隔（Ｌ１、Ｌ２、Ｌ３）に配設されている。
このようにバッフル板９Ａを配設すれば、図３に示した
等間隔の場合の最長スパンＬ０（全長の約２／３）に対
し、図８に示すＬのように減少させることができる。In the fifth embodiment shown in FIG. 8, the positions of the baffle plates 9A (or 9B) are arranged at irregular intervals (L1, L2, L3) in the axial direction of the shell 1.
By arranging the baffle plate 9A in this manner, it is possible to reduce the longest span L0 (approximately 2/3 of the entire length) at equal intervals shown in FIG. 3 as indicated by L in FIG.
【００２２】図９に示す第６の実施形態では、伝熱管４
がシェル１内の上部および下部の所定距離Ｓ１、Ｓ２を
おいて配設されている。このように伝熱管４を配設する
ことで、比較的破損し易い上下端部の伝熱管４を除いて
構成できる。なお、この実施形態では、上部に伝熱管４
がないので、エアが溜まっても問題が起きず、エア抜き
口を廃止することができる。In the sixth embodiment shown in FIG.
Are disposed at predetermined distances S1 and S2 between the upper and lower portions in the shell 1. By arranging the heat transfer tubes 4 in this manner, the heat transfer tubes 4 at the upper and lower ends, which are relatively easily damaged, can be excluded. In this embodiment, the heat transfer tube 4
Since there is no air, there is no problem even if air accumulates, and the air vent can be eliminated.
【００２３】図１０に示す第７の実施形態では、バッフ
ル板９Ｃは、シェル１内周に沿って円環状に最外周の伝
熱管４ｓのみが貫通支持するように形成されている。こ
の例では、上端部にエア抜き用の切り欠きＧが設けられ
ている。このように、破損事故の起きやすい最外周部の
伝熱管４ｓのみを支持するように構成し、トラブルを回
避できる。In the seventh embodiment shown in FIG. 10, the baffle plate 9C is formed in an annular shape along the inner periphery of the shell 1 so that only the outermost heat transfer tube 4s penetrates and supports. In this example, a notch G for bleeding air is provided at the upper end. In this way, the configuration is such that only the outermost heat transfer tube 4s, in which a breakage accident is likely to occur, is supported, and trouble can be avoided.
【００２４】また、図１１に示すバッフル板９Ｄのよう
に円環状の上部を切り欠いたものでもよい（馬蹄形
状）。Further, a baffle plate 9D shown in FIG. 11 may be formed by cutting off an annular upper portion (horse-shoe shape).
【００２５】図１２には、バッフル板９を用いて伝熱管
４を支持する別の実施形態が示されている。図１０にお
いて、バッフル板９には、連続する不定型な溝が形成さ
れており、該溝は、円形断面部分８ａと、長方形断面部
分８ｂとからなり、長方形断面部分８ｂは円形断面部分
８ａ間を接続している。伝熱管４は前記溝の円形断面部
分８により支持されている。一方、前記溝の長方形断面
部分８ｂは冷却水通路として使用されている、なお、円
形断面部分８ａにおける伝熱管４の支持態様について
は、特に、限定刷るものでは無く、種々の手法が採用可
能である。FIG. 12 shows another embodiment in which the heat transfer tube 4 is supported using the baffle plate 9. In FIG. 10, a continuous irregular groove is formed in the baffle plate 9, and the groove includes a circular section 8a and a rectangular section 8b, and the rectangular section 8b is formed between the circular sections 8a. Are connected. The heat transfer tube 4 is supported by a circular section 8 of the groove. On the other hand, the rectangular section 8b of the groove is used as a cooling water passage. The manner of supporting the heat transfer tube 4 in the circular section 8a is not particularly limited, and various techniques can be adopted. is there.
【００２６】図１３に示す実施形態では、バッフル板９
Ｅの外周部９ｅは折り曲げられ、シェル１内周へはその
外周部９ｅが当接してろう付により固着されており、バ
ッフル板９Ｅを確実に支持することができる。但し、ろ
う付をしなくても良い。In the embodiment shown in FIG.
The outer peripheral portion 9e of E is bent, and the outer peripheral portion 9e abuts on the inner periphery of the shell 1 and is fixed by brazing, so that the baffle plate 9E can be reliably supported. However, it is not necessary to braze.
【００２７】図１４および図１５には、伝熱管４をバッ
フル板９へ固着する実施形態が示されている。図１４の
実施形態では、伝熱管４のバッフル板９貫通部の両側
Ｋ、Ｋが、その断面が楕円形にかしめられ、伝熱管４が
バッフル板９に固着されている。FIGS. 14 and 15 show an embodiment in which the heat transfer tube 4 is fixed to the baffle plate 9. In the embodiment of FIG. 14, both sides K, K of the penetrating portion of the baffle plate 9 of the heat transfer tube 4 are caulked in an elliptical cross section, and the heat transfer tube 4 is fixed to the baffle plate 9.
【００２８】また、図１５の実施形態では、伝熱管４の
バッフル板９貫通部の両側Ｈ、Ｈが、チューブ内側から
拡径されてバッフル板９に固着されている。In the embodiment shown in FIG. 15, both sides H of the penetrating portion of the baffle plate 9 of the heat transfer tube 4 are fixed to the baffle plate 9 by expanding the diameter from the inside of the tube.
【００２９】図１６には、バッフル板９のクーラシェル
１に対する位置決めの実施形態が示されている。シェル
１の内周面に突起部Ｔが突設され、その突起部Ｔには溝
が設けられて、バッフル板９が嵌め込まれ、位置決めさ
れている。FIG. 16 shows an embodiment of positioning the baffle plate 9 with respect to the cooler shell 1. A projection T is provided on the inner peripheral surface of the shell 1, and a groove is provided in the projection T, and the baffle plate 9 is fitted and positioned.
【００３０】以上、本発明によるＥＧＲクーラのクーラ
シェル内の冷却水流路１ａの構成について説明した。一
方、排気ガスＧの通路との関係は、図１７に示すように
シェル１の両端部の入口２Ａおよび出口２Ｂに対して冷
却水の入口５および出口６は、出口同志、入口同志が同
じ側に設けられ、伝熱管４内の排気ガスＧの流れ方向と
冷却水流路１ａの冷却水Ｗの流れ方向とが同方向（図の
右から左）に構成されている。このように構成すること
により、伝熱管４の流入部における排気ガスＧと冷却水
Ｗとの温度差が大きくなって、良好な結果が得らる。The configuration of the cooling water passage 1a in the cooler shell of the EGR cooler according to the present invention has been described above. On the other hand, as shown in FIG. 17, the relationship between the exhaust gas G and the passage of the exhaust gas G is such that the inlet 5 and the outlet 6 of the cooling water are on the same side with respect to the inlet 2A and the outlet 2B at both ends of the shell 1. The flow direction of the exhaust gas G in the heat transfer tube 4 and the flow direction of the cooling water W in the cooling water flow path 1a are configured in the same direction (from right to left in the figure). With this configuration, the temperature difference between the exhaust gas G and the cooling water W at the inflow portion of the heat transfer tube 4 increases, and good results can be obtained.
【００３１】[0031]
【発明の効果】本発明は、以上説明したように構成さ
れ、以下に示す効果を奏する。 （１） 伝熱管をバッフル板によって支持することで、
熱応力あるいは振動等による破損が防止できる。 （２） また、これに併せてバッフル板の挿入によって
流れを案内し、冷却の向上が図れる。 （３） そして、バッフル板の形状、支持方法を適宜選
択することで構造が簡単でかつ最適な性能とすることが
できる。The present invention is configured as described above and has the following effects. (1) By supporting the heat transfer tube with a baffle plate,
Damage due to thermal stress or vibration can be prevented. (2) At the same time, the flow is guided by inserting a baffle plate, so that the cooling can be improved. (3) By appropriately selecting the shape and the supporting method of the baffle plate, the structure can be simplified and the optimum performance can be obtained.
【図１】本発明の第１の実施形態を説明する斜視図。FIG. 1 is a perspective view illustrating a first embodiment of the present invention.
【図２】本発明の第２の実施形態を示すシェル部分の縦
断面図。FIG. 2 is a longitudinal sectional view of a shell part according to a second embodiment of the present invention.
【図３】本発明の第３の実施形態を示すシェル部分の縦
断面図。FIG. 3 is a longitudinal sectional view of a shell part according to a third embodiment of the present invention.
【図４】図３の実施形態のバッフル板を示す正面図。FIG. 4 is a front view showing the baffle plate of the embodiment shown in FIG. 3;
【図５】本発明の第４の実施形態を示すシェル部分の縦
断面図。FIG. 5 is a longitudinal sectional view of a shell part according to a fourth embodiment of the present invention.
【図６】図５の実施形態のバッフル板を示す正面図。FIG. 6 is a front view showing the baffle plate of the embodiment shown in FIG. 5;
【図７】図５の透過斜視図。FIG. 7 is a transparent perspective view of FIG. 5;
【図８】本発明の第５の実施形態を示すシェル部分の縦
断面図。FIG. 8 is a longitudinal sectional view of a shell part according to a fifth embodiment of the present invention.
【図９】本発明の第６の実施形態を示す横断面図。FIG. 9 is a cross-sectional view showing a sixth embodiment of the present invention.
【図１０】本発明の第７の実施形態を示す横断面図。FIG. 10 is a cross-sectional view showing a seventh embodiment of the present invention.
【図１１】図１０の実施形態とは別のバッフル板を示す
正面図。FIG. 11 is a front view showing another baffle plate different from the embodiment in FIG. 10;
【図１２】伝熱管を支持する別の実施形態を示す断面
図。FIG. 12 is a sectional view showing another embodiment for supporting a heat transfer tube.
【図１３】バッフル板を支持する実施形態を示す断面
図。FIG. 13 is a sectional view showing an embodiment for supporting a baffle plate.
【図１４】伝熱管のバッフル板への固着の実施形態を示
す図。FIG. 14 is a diagram showing an embodiment of fixing a heat transfer tube to a baffle plate.
【図１５】伝熱管のバッフル板への固着の別の実施形態
を示す図。FIG. 15 is a diagram showing another embodiment of fixing the heat transfer tube to the baffle plate.
【図１６】バッフル板のシェルへの位置決めの実施形態
を示す図。FIG. 16 is a diagram showing an embodiment of positioning a baffle plate on a shell.
【図１７】伝熱管内外の排気ガスおよび冷却水の流れ方
向を説明する図。FIG. 17 is a diagram illustrating the flow direction of exhaust gas and cooling water inside and outside the heat transfer tube.
【図１８】従来のＥＧＲクーラを示す側面図。FIG. 18 is a side view showing a conventional EGR cooler.
１・・・クーラシェル ２・・・排気ガス出入口 ４・・・伝熱管 ５・・・冷却水入口 ６・・・冷却水出口 ９、９Ａ、９Ｂ・・・バッフル板 DESCRIPTION OF SYMBOLS 1 ... Cooler shell 2 ... Exhaust gas inlet / outlet 4 ... Heat transfer tube 5 ... Cooling water inlet 6 ... Cooling water outlet 9, 9A, 9B ... Baffle plate
───────────────────────────────────────────────────── フロントページの続き (72)発明者 藤 原 秀 文 埼玉県上尾市大字壱丁目１番地 日産ディ ーゼル工業株式会社内 (72)発明者 杉 山 元 治 静岡県沼津市大岡1719−１ Ｆターム(参考） 3G062 ED08 GA10 3L103 AA37 AA44 BB39 CC02 CC26 DD08 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hidefumi Fujiwara 1-chome, 1-chome, Ageo-shi, Saitama Nissan Diesel Industry Co., Ltd. (72) Inventor Motoharu Sugiyama 1719-1 F, Ooka, Numazu-shi, Shizuoka F Term (reference) 3G062 ED08 GA10 3L103 AA37 AA44 BB39 CC02 CC26 DD08
Claims (12)
その軸線に平行に設け、それらの伝熱管内部に排気ガス
を、伝熱管外部に冷却水をそれぞれ流れるように構成
し、内燃機関の排気還流装置に介装した排気ガス冷却器
の構造において、クーラシェルの軸線が水平に近いよう
に配設し、そのシェルの一端近くの下方位置に冷却水入
口を、対向する他端近くの上方位置に冷却水出口をそれ
ぞれ配設し、シェル内の冷却水流路に半円形状をしてお
り且つ半円形状の欠けた部分を冷却水通路としているバ
ッフル板を複数枚設け、それらのバッフル板は冷却水入
口寄りでは通路部分が上方に、冷却水出口寄りでは通路
部分が下方になるようにしその間は順次回転して配設し
冷却水が螺旋状に流れるように構成していることを特徴
とする排気冷却器の構造。1. An internal combustion engine, wherein a plurality of heat transfer tubes are provided in a cylindrical cooler shell in parallel to the axis thereof, and exhaust gas flows inside the heat transfer tubes and cooling water flows outside the heat transfer tubes. In the structure of the exhaust gas cooler interposed in the exhaust gas recirculation device, the axis of the cooler shell is disposed so as to be nearly horizontal, and a cooling water inlet is provided at a lower position near one end of the shell, and near the opposite other end. A plurality of baffle plates, each having a cooling water outlet disposed at an upper position, having a semicircular shape in the cooling water flow path in the shell and having a semicircular chipped portion as a cooling water passage, are provided. The plate is configured such that the passage portion is located upward near the cooling water inlet and the passage portion is located downward near the cooling water outlet, and the plates are sequentially rotated and arranged so that the cooling water flows spirally. Characteristic exhaust cooler structure Build.
その軸線に平行に設け、それらの伝熱管内部に排気ガス
を、伝熱管外部に冷却水をそれぞれ流れるように構成
し、内燃機関の排気還流装置に介装した排気ガス冷却器
の構造において、クーラシェルの軸線が水平に近いよう
に配設し、そのシェルの一端近くの下方位置に冷却水入
口を、対向する他端近くの上方位置に冷却水出口をそれ
ぞれ配設し、シェル内の冷却水流路に半円形状をしてお
り且つ半円形状の欠けた部分を冷却水通路としているバ
ッフル板を複数枚設け、それらのバッフル板は冷却水入
口寄りでは通路部分が上方に、冷却水出口寄りでは通路
部分が下方になるようにしその間は交互に配設して冷却
水が上下方向に波状に流れるように構成していることを
特徴とする排気冷却器の構造。2. An internal combustion engine, wherein a plurality of heat transfer tubes are provided in a cylindrical cooler shell in parallel with its axis, and exhaust gas flows inside the heat transfer tubes and cooling water flows outside the heat transfer tubes. In the structure of the exhaust gas cooler interposed in the exhaust gas recirculation device, the axis of the cooler shell is disposed so as to be nearly horizontal, and a cooling water inlet is provided at a lower position near one end of the shell, and near the opposite other end. A plurality of baffle plates, each having a cooling water outlet disposed at an upper position, having a semicircular shape in the cooling water flow path in the shell and having a semicircular chipped portion as a cooling water passage, are provided. The plate shall be configured so that the passage part is upward near the cooling water inlet and the passage part is downward near the cooling water outlet, so that the cooling water is arranged alternately between them so that the cooling water flows wavy in the vertical direction Exhaust cooler characterized by Structure.
その軸線に平行に設け、それらの伝熱管内部に排気ガス
を、伝熱管外部に冷却水をそれぞれ流れるように構成
し、内燃機関の排気還流装置に介装した排気ガス冷却器
の構造において、クーラシェルの軸線が水平に近いよう
に配設し、そのシェルの一端近くの下方位置に冷却水入
口を、対向する他端近くの上方位置に冷却水出口をそれ
ぞれ配設し、シェル内の冷却水流路に冷却水の通路部分
を有する複数枚のバッフル板を設け、それらのバッフル
板はその通路部分が上下方向に交互に配設されており、
かつ各バッフル板に中央段の伝熱管が支持されているこ
とを特徴とする排気冷却器の構造。3. An internal combustion engine, wherein a plurality of heat transfer tubes are provided in a cylindrical cooler shell in parallel with its axis, and exhaust gas flows inside the heat transfer tubes and cooling water flows outside the heat transfer tubes. In the structure of the exhaust gas cooler interposed in the exhaust gas recirculation device, the axis of the cooler shell is disposed so as to be nearly horizontal, and a cooling water inlet is provided at a lower position near one end of the shell, and near the opposite other end. A cooling water outlet is provided at an upper position, and a plurality of baffle plates having a cooling water passage portion are provided in a cooling water flow passage in a shell, and the baffle plates are arranged alternately in a vertical direction. Has been
A structure of an exhaust cooler, wherein a central stage heat transfer tube is supported on each baffle plate.
かれて冷却水の通路部分が形成され、その通路部分は中
央部分から偏奇した領域に設けられ、前記中央部分は伝
熱管を支持している請求項３の排気冷却器の構造。4. The baffle plate has a circular portion cut out to form a cooling water passage portion, the passage portion being provided in a region deviated from a central portion, and the central portion supporting a heat transfer tube. 4. The structure of the exhaust cooler according to claim 3, wherein:
その軸線に平行に設け、それらの伝熱管内部に排気ガス
を、伝熱管外部に冷却水をそれぞれ流れるように構成
し、内燃機関の排気還流装置に介装した排気ガス冷却器
の構造において、クーラシェルの軸線が水平に近いよう
に配設し、そのシェルの一端近くの下方位置に冷却水入
口を、対向する他端近くの上方位置に冷却水出口をそれ
ぞれ配設し、シェル内の冷却水流路に冷却水の通路部分
を有する複数枚のバッフル板を設け、それらのバッフル
板はその通路部分が上下方向に交互に配設されており、
そのバッフル板は円形状の周囲を有し、中央部分から偏
奇した領域に孔を穿設して冷却水の通路部分が形成さ
れ、前記中央部分は伝熱管を支持していることを特徴と
する排気冷却器の構造。5. An internal combustion engine, wherein a plurality of heat transfer tubes are provided in a cylindrical cooler shell in parallel with the axis thereof, and exhaust gas flows inside the heat transfer tubes and cooling water flows outside the heat transfer tubes. In the structure of the exhaust gas cooler interposed in the exhaust gas recirculation device, the axis of the cooler shell is disposed so as to be nearly horizontal, and a cooling water inlet is provided at a lower position near one end of the shell, and near the opposite other end. A cooling water outlet is provided at an upper position, and a plurality of baffle plates having a cooling water passage portion are provided in a cooling water flow passage in a shell, and the baffle plates are arranged alternately in a vertical direction. Has been
The baffle plate has a circular periphery, a hole is formed in a region deviated from the central portion to form a cooling water passage portion, and the central portion supports a heat transfer tube. Exhaust cooler structure.
軸線方向に対し不等間隔に配設されている請求項３〜５
の排気冷却器の構造。6. The baffle plate is disposed at unequal intervals in the axial direction of the cooler shell.
Exhaust cooler structure.
び下部から距離をおいて配設され、各伝熱管がバッフル
板に貫通支持されている請求項３〜５の排気冷却器の構
造。7. The exhaust cooler structure according to claim 3, wherein said heat transfer tubes are disposed at a distance from an upper portion and a lower portion in a cooler shell, and each heat transfer tube is supported through a baffle plate.
その軸線に平行に設け、それらの伝熱管内部に排気ガス
を、伝熱管外部に冷却水をそれぞれ流れるように構成
し、内燃機関の排気還流装置に介装した排気ガス冷却器
の構造において、クーラシェルの軸線が水平に近いよう
に配設し、そのシェルの一端近くの下方位置に冷却水入
口を、対向する他端近くの上方位置に冷却水出口をそれ
ぞれ配設し、シェル内の冷却水流路に複数枚の冷却水の
通路部分を有するバッフル板を設け、それらのバッフル
板はシェル内周に沿った円環状に形成され、外周部の伝
熱管がそのバッフル板に貫通支持されていることを特徴
とする排気冷却器の構造。8. An internal combustion engine, wherein a plurality of heat transfer tubes are provided in a cylindrical cooler shell in parallel with its axis, and exhaust gas flows inside the heat transfer tubes and cooling water flows outside the heat transfer tubes. In the structure of the exhaust gas cooler interposed in the exhaust gas recirculation device, the axis of the cooler shell is disposed so as to be nearly horizontal, and a cooling water inlet is provided at a lower position near one end of the shell, and near the opposite other end. Cooling water outlets are respectively arranged at upper positions, baffle plates having a plurality of cooling water passage portions are provided in a cooling water flow path in the shell, and the baffle plates are formed in an annular shape along the shell inner periphery. And a heat transfer tube at an outer peripheral portion thereof is supported by being penetrated by the baffle plate.
その軸線に平行に設け、それらの伝熱管内部に排気ガス
を、伝熱管外部に冷却水をそれぞれ流れるように構成
し、内燃機関の排気還流装置に介装した排気ガス冷却器
の構造において、シェル内の冷却水流路に複数枚の冷却
水の通路部分を有するバッフル板を設け、該バッフル板
には連続する不定形な溝が形成されており、該溝は円形
断面部分と長方形断面部分とからなり、前記伝熱管は前
記溝の円形断面部分により支持されており、長方形断面
部分は円形断面部分間を接続し且つ冷却水通路として作
用するように構成されていることを特徴とする排気冷却
器の構造。9. An internal combustion engine, wherein a plurality of heat transfer tubes are provided in a cylindrical cooler shell in parallel with the axis thereof, and exhaust gas flows inside the heat transfer tubes and cooling water flows outside the heat transfer tubes. In the structure of the exhaust gas cooler interposed in the exhaust gas recirculation device, a baffle plate having a plurality of cooling water passage portions is provided in the cooling water flow path in the shell, and the baffle plate has a continuous irregular groove. The heat transfer tube is supported by a circular cross section of the groove, the rectangular cross section connects between the circular cross sections and a cooling water passage. The structure of an exhaust cooler, characterized in that it is configured to act as a.
げ、クーラシェル内周に固着している請求項１〜９の排
気冷却器の構造。10. The structure of the exhaust cooler according to claim 1, wherein an outer peripheral portion of the baffle plate is bent and fixed to an inner periphery of the cooler shell.
しめによってバッフル板に固着している請求項１〜９の
排気冷却器。11. The exhaust gas cooler according to claim 1, wherein a heat transfer tube penetrating the baffle plate is fixed to the baffle plate by caulking.
伝熱管内部の排気ガスの流れと同方向になるように冷却
水入口および出口を配設した請求項１〜１１の排気冷却
器。12. The exhaust cooler according to claim 1, wherein a cooling water inlet and an outlet are arranged so that a flow direction of the cooling water outside the heat transfer tube is in the same direction as a flow of the exhaust gas inside the heat transfer tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09915599A JP3719578B2 (en) | 1999-04-06 | 1999-04-06 | Exhaust cooler structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09915599A JP3719578B2 (en) | 1999-04-06 | 1999-04-06 | Exhaust cooler structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000292089A true JP2000292089A (en) | 2000-10-20 |
| JP3719578B2 JP3719578B2 (en) | 2005-11-24 |
Family
ID=14239799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09915599A Expired - Fee Related JP3719578B2 (en) | 1999-04-06 | 1999-04-06 | Exhaust cooler structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3719578B2 (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004077024A (en) * | 2002-08-19 | 2004-03-11 | Denso Corp | Exhaust heat exchanger device |
| WO2004031565A1 (en) * | 2002-10-02 | 2004-04-15 | Hino Motors, Ltd. | Egr cooler |
| GB2379006B (en) * | 2001-06-27 | 2005-11-30 | David Thomas | Waste (water) heat extraction-recovery |
| KR100686934B1 (en) | 2005-03-29 | 2007-02-26 | 나라엠앤디(주) | A recursion an exhaust gas cooling device again |
| KR101016858B1 (en) | 2003-08-20 | 2011-02-22 | 에이비이비이 러머스 글로벌 인코포레이티드 | Heat exchanger |
| WO2011061090A2 (en) | 2009-11-18 | 2011-05-26 | Valeo Termico, S.A. | Heat exchanger for gases, in particular for the exhaust gases of an engine |
| CN102692154A (en) * | 2012-06-08 | 2012-09-26 | 宜兴市格兰特干燥浓缩设备有限公司 | Novel heat exchange tube supporting plate |
| CN102777236A (en) * | 2012-08-24 | 2012-11-14 | 重庆海特汽车排气***有限公司 | Cooling device for vehicle gas discharge pipeline |
| JP2013042661A (en) * | 2012-11-27 | 2013-02-28 | Daikin Ind Ltd | Electric motor |
| JP2013068131A (en) * | 2011-09-21 | 2013-04-18 | Taiho Kogyo Co Ltd | Swirl plate |
| KR101282684B1 (en) * | 2006-08-09 | 2013-07-05 | 현대자동차주식회사 | Exhaust Gas Recirculation cooler |
| KR20180053064A (en) * | 2016-11-11 | 2018-05-21 | 이노엔 주식회사 | Heat Exchanger for Heat Recovery |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2379006B (en) * | 2001-06-27 | 2005-11-30 | David Thomas | Waste (water) heat extraction-recovery |
| JP2004077024A (en) * | 2002-08-19 | 2004-03-11 | Denso Corp | Exhaust heat exchanger device |
| WO2004031565A1 (en) * | 2002-10-02 | 2004-04-15 | Hino Motors, Ltd. | Egr cooler |
| US7594536B2 (en) | 2002-10-02 | 2009-09-29 | Hino Motors, Ltd. | EGR cooler |
| KR100971617B1 (en) | 2002-10-02 | 2010-07-22 | 히노 지도샤 가부시키가이샤 | Egr cooler |
| KR101016858B1 (en) | 2003-08-20 | 2011-02-22 | 에이비이비이 러머스 글로벌 인코포레이티드 | Heat exchanger |
| KR100686934B1 (en) | 2005-03-29 | 2007-02-26 | 나라엠앤디(주) | A recursion an exhaust gas cooling device again |
| KR101282684B1 (en) * | 2006-08-09 | 2013-07-05 | 현대자동차주식회사 | Exhaust Gas Recirculation cooler |
| WO2011061090A2 (en) | 2009-11-18 | 2011-05-26 | Valeo Termico, S.A. | Heat exchanger for gases, in particular for the exhaust gases of an engine |
| JP2013068131A (en) * | 2011-09-21 | 2013-04-18 | Taiho Kogyo Co Ltd | Swirl plate |
| CN102692154A (en) * | 2012-06-08 | 2012-09-26 | 宜兴市格兰特干燥浓缩设备有限公司 | Novel heat exchange tube supporting plate |
| CN102777236A (en) * | 2012-08-24 | 2012-11-14 | 重庆海特汽车排气***有限公司 | Cooling device for vehicle gas discharge pipeline |
| JP2013042661A (en) * | 2012-11-27 | 2013-02-28 | Daikin Ind Ltd | Electric motor |
| KR20180053064A (en) * | 2016-11-11 | 2018-05-21 | 이노엔 주식회사 | Heat Exchanger for Heat Recovery |
| KR101864651B1 (en) * | 2016-11-11 | 2018-06-05 | 이노엔 주식회사 | Heat Exchanger for Heat Recovery |
| JP2022510571A (en) * | 2018-11-14 | 2022-01-27 | ハンオン システムズ | Heat exchanger |
| JP7194825B2 (en) | 2018-11-14 | 2022-12-22 | ハンオン システムズ | Heat exchanger |
| JP2021051841A (en) * | 2019-09-24 | 2021-04-01 | 三菱電機株式会社 | Gas circuit breaker |
| JP7129961B2 (en) | 2019-09-24 | 2022-09-02 | 三菱電機株式会社 | gas circuit breaker |
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| JP3719578B2 (en) | 2005-11-24 |
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