JP4224768B2 - EGR cooler and manufacturing method thereof - Google Patents

EGR cooler and manufacturing method thereof Download PDF

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Publication number
JP4224768B2
JP4224768B2 JP2002346564A JP2002346564A JP4224768B2 JP 4224768 B2 JP4224768 B2 JP 4224768B2 JP 2002346564 A JP2002346564 A JP 2002346564A JP 2002346564 A JP2002346564 A JP 2002346564A JP 4224768 B2 JP4224768 B2 JP 4224768B2
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Prior art keywords
casing
pair
egr cooler
peripheral wall
tank
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JP2004177058A (en
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俊道 小林
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T.RAD CO., L T D.
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T.RAD CO., L T D.
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    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • 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
    • F28F9/02—Header boxes; End plates
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、自動車エンジン等の排気ガス再循環装置に用いられる排気ガス冷却用のＥＧＲクーラおよびその製造方法に関し、多数のチューブとケーシングおよびヘッダとを有するものに関する。
【０００２】
【従来の技術】
シェル＆チューブと言われるＥＧＲクーラは、互いに離間して並列された多数のチューブの両端をヘッダプレートに貫通固定してコアを構成し、コアの外周にケーシングを被嵌すると共に、一対のヘッダプレートに夫々ヘッダ本体を取付ける。そしてケーシングにその長手方向に離間し一対の冷却水出入口パイプを連通させ、一方のヘッダから各チューブを介して他方ヘッダに排ガスを流通させ、チューブの外面側の冷却水によりそれを冷却するこものである。
このようなシェル＆チューブタイプの熱交換器は、その部品点数が多く、組立てが面倒である欠点があった。
【０００３】
そこで部品点数を少なくし、その組立てを容易とするものとして、一対の筒状部材により夫々ケーシングの半分とヘッダ本体とを形成し、その一対の筒状体を軸方向に端部連結して、その端部間をろう付け固定していた。
それと共に、ヘッダプレートの外周と夫々の筒状体との間もろう付けにより接合していた（例えば、特許文献１参照。）。
【０００４】
【特許文献１】
特開２００１０−２７２１８５号公報（第１図および第２図）
【０００５】
【発明が解決しようとする課題】
上記のヘッダープレートは、一対の筒状体を軸方向に繋ぎ合わせたものであり組立てが簡便である特徴があるものの、ヘッダ本体部とケーシング部と冷却水の流出入孔その他をプレート材から別成形により成形するには、多くの絞り型および工程を必要とし、結果的に生産コストが高くなる欠点があった。
そこで、本発明は製造し易く且つ部品点数の少ないＥＧＲクーラおよびその製造方法を提供することを課題とする。
【０００６】
【課題を解決するための手段】
請求項１に記載の本発明は、夫々の側壁部(1)の縁どうしが互いに整合するように、細長い溝状にプレス形成した一対の溝形本体(2) (3) と、
多数のチューブ(4)の両端部を一対のヘッダープレート(5)に貫通固定したコア(6)と、を用意し、
夫々の溝形本体(2) (3) は、両端部に半分相当のタンク部(7) を形成すると共に、中間部に半分相当のケーシング部(8) を一体に形成し、
そのケーシング部 (8) の両端部に膨出部 (11) を一体に形成し、その膨出部 (11) に冷却用流体の出入口 (12) を開口し、
前記タンク部 (7) の横断面はそれとケーシング部 (8) の膨出部 (11) との境部 (10) から先端側に縮小するように形成し、
夫々のヘッダープレート(5)の全周縁を立ち上げて環状周壁部(9) を有する浅い鍋形に形成し且つ、その環状周壁部(9) の外面を、夫々のケーシング部(8) の前記膨出部 (11)とタンク部(7) との境部(10)の内周に整合するように形成し、
前記一対の溝形本体(2) (3) の側壁部の縁どうしを突き合わして、筒形に形成すると共に、そのケーシング部(8) に前記コア(6)を内装して、前記環状周壁部(9) を前記境部(10)に位置させ、
一対の溝形本体(2) (3) の突き合わせ部を溶接により接合すると共に、前記境部(10)の外周を環状に連続して、その外周から、ケーシング部 (8) の長手方向に離間した二つの位置で、二条に溶接接合したことを特徴とするＥＧＲクーラの製造方法である。
【０００７】
請求項２に記載の本発明は、請求項１に記載の製造方法により製造されたＥＧＲクーラである。
【０００８】
【発明の実施の形態】
次に、図面に基づいて本発明の実施の形態につき説明する。
図１は本発明の製造方法により製造されたＥＧＲクーラの一部破断正面図であり、図２はその図１のII部拡大図である。また、図３は本ＥＧＲクーラの要部分解斜視図である。
このＥＧＲクーラは、多数のチューブ４と一対のヘッダープレート５とからなるコア６と上下一対の溝形本体２，３と一対のフランジ14とからなる。コア６は、互いに離間して並列された多数のチューブ４の両端が一対のヘッダープレート５に液密および気密に貫通固定されている。
【０００９】
このヘッダープレート５は、全周縁を立ち上げてそこに環状周壁部９を形成した浅い鍋形を有する。その環状周壁部９は、後述する溝形本体２，３の境部10の内面に整合する。溝形本体２，３は夫々同一形状を有し、その側壁部１の縁どうしが互いに整合する同一幅に形成されている。この溝形本体２，３は、プレス成形により一体に形成されるものであって、その両端部に夫々半分相当のタンク部７が形成されると共に、中間部に半分相当の細長いケーシング部８が一体に形成されている。
なお、タンク部７は先端が先細りとなる立体的なテーパに形成されている。
【００１０】
タンク部７とケーシング部８との中間には、膨出部11が形成されている。そして、その膨出部11とタンク部７との境に境部10が存在する。この境部10の内面側にコア６のヘッダープレート５の環状周壁部９が嵌着される。即ち、一方の溝形本体３のケーシング部８にコア６を挿入し、他方の溝形本体２をコア６の上方から被嵌する。そして溝形本体２の側壁部１の縁部と溝形本体３の側壁部１の縁部とを突き合わせ筒形に形成する。このとき、環状周壁部９は溝形本体２および溝形本体３の境部10に位置され互いに接触する。次いで、溝形本体２，３により筒形を形成した両端に一対のフランジ14の開口19を嵌着し、各部品間を組み立てる。
【００１１】
次いで、側壁部１，溝形本体２の突き合わせ部をティグ溶接等により溶接すると共に、溝形本体２，３の境部10においてその外周からレーザー溶接等により、溝形本体２とヘッダープレート５との間を一体に溶接する。このとき、その溶接部は境部10において環状に形成される。図２の例では、２本の環状溶接部15が並列して形成される。また、フランジ14の開口19とタンク部７の先端との間は、ティグ溶接等により溶接される。さらに溝形本体２，３には夫々出入口12が形成され、そこにパイプ13の端部が装着されその装着部が溶接固定されるものである。
【００１２】
このようにしてなるＥＧＲクーラは、一対のフランジ14を介して図示しない排ガス循環路に介装され、排ガス17が一方のタンク部７から流入し、夫々のチューブ４を介して他方のタンク部７に流通する。また、一方のパイプ13から冷却水18が流入し、膨出部11を介して各チューブ４の外周に均一に流通し、他方のパイプ13からそれが流出する。そして、その冷却水18によって排ガス17が冷却されるものである。
【００１３】
【発明の作用・効果】
本発明のＥＧＲクーラの製造方法およびそのＥＧＲクーラは、一対の溝形本体２，３の夫々の両端部にタンク部７が設けられ、中間部にケーシング部８が形成されたものである。そして、そのケーシング部８の膨出部１１とタンク部７との境部１０にヘッダープレート５の環状周壁部９が位置されて、二条の溶接により接合されるものであるから、部品点数が少なく且つ溶接が容易であると共に、その溶接の信頼性が向上する。しかも、ヘッダープレート５はその外周に立上げられた環状周壁部９を有するため、一定の幅を有し、溝形本体２，３の外周からそれらと環状周壁部９との溶接が容易である。それにより、信頼性の高いＥＧＲクーラを提供できる。
さらに、タンク部７の横断面は、それとケーシング部８の膨出部１１の境部１０から先端側に縮小するように形成されているため、環状周壁部９はタンク部７側に移動することなく境部１０に正確に位置決めされ、ケーシングの外周からでも、溶接位置を容易に特定して溶接の信頼性を向上し得る。
【図面の簡単な説明】
【図１】本発明の製造方法により製造されたＥＧＲクーラの一部破断正面図。
【図２】図１のII部拡大断面図。
【図３】本発明のＥＧＲクーラの要部分解斜視図。
【符号の説明】
１ 側壁部
２，３ 溝形本体
４ チューブ
５ ヘッダープレート
６ コア
７ タンク部
８ ケーシング部
９ 環状周壁部
10 境部
11 膨出部
12 出入口
13 パイプ
14 フランジ
15 環状溶接部
16 突き合わせ溶接部
17 排ガス
18 冷却水
19 開口[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an exhaust gas cooling EGR cooler used in an exhaust gas recirculation device such as an automobile engine and a method for manufacturing the same, and more particularly to an apparatus having a large number of tubes, casings, and headers.
[0002]
[Prior art]
An EGR cooler called a shell and tube forms a core by penetrating and fixing both ends of a large number of spaced apart tubes in parallel to a header plate, and a casing is fitted on the outer periphery of the core, and a pair of header plates Attach the header body to each. Then, a pair of cooling water inlet / outlet pipes are separated from each other in the longitudinal direction of the casing, and exhaust gas is circulated from one header to the other header through each tube, and is cooled by cooling water on the outer surface side of the tube. is there.
Such a shell-and-tube type heat exchanger has a number of parts and has a drawback of being troublesome to assemble.
[0003]
Therefore, to reduce the number of parts and facilitate the assembly, half of the casing and the header main body are formed by a pair of cylindrical members, respectively, and the pair of cylindrical bodies are connected to the ends in the axial direction, The ends were brazed and fixed.
At the same time, the outer periphery of the header plate and each cylindrical body are also joined by brazing (see, for example, Patent Document 1).
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 2010-272185 (FIGS. 1 and 2)
[0005]
[Problems to be solved by the invention]
The above header plate is formed by connecting a pair of cylindrical bodies in the axial direction and is easy to assemble. However, the header body, casing, cooling water inflow / outlet holes, etc. are separated from the plate material. In order to form by molding, many drawing molds and processes are required, and as a result, there is a drawback that the production cost increases.
Accordingly, an object of the present invention is to provide an EGR cooler that is easy to manufacture and has a small number of parts, and a method for manufacturing the EGR cooler.
[0006]
[Means for Solving the Problems]
The present invention described in claim 1 includes a pair of channel-shaped bodies (2) (3) press-formed into elongated grooves so that the edges of the respective side wall portions (1) are aligned with each other;
Prepare a core (6) that penetrates and fixes both ends of a number of tubes (4) to a pair of header plates (5),
Each channel-shaped main body (2) (3) forms a tank part (7) equivalent to half at both ends, and integrally forms a casing part (8) equivalent to half at the intermediate part ,
The bulging portion (11) is integrally formed at both ends of the casing portion (8) , the cooling fluid inlet / outlet (12) is opened in the bulging portion (11) ,
The cross section of the tank part (7) is formed so as to shrink from the boundary part (10) between it and the bulging part (11) of the casing part (8 ) to the tip side,
The entire peripheral edge of each header plate (5) is raised to form a shallow pan shape having an annular peripheral wall portion (9), and the outer surface of the annular peripheral wall portion (9) is formed on the outer surface of each casing portion (8) . Formed so as to be aligned with the inner periphery of the boundary portion (10) between the bulging portion (11) and the tank portion (7),
The edges of the side walls of the pair of groove-shaped main bodies (2) (3) are abutted to form a cylindrical shape, and the core (6) is housed in the casing portion (8), and the annular peripheral wall Part (9) is located at the border (10),
The butted portions of the pair of channel main bodies (2) (3) are joined by welding, and the outer periphery of the boundary portion (10) is continuously annularly spaced from the outer periphery in the longitudinal direction of the casing portion (8). It is the manufacturing method of the EGR cooler characterized by welding-joining to two strips in two positions .
[0007]
The present invention according to claim 2 is an EGR cooler manufactured by the manufacturing method according to claim 1 .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a partially broken front view of an EGR cooler manufactured by the manufacturing method of the present invention, and FIG. 2 is an enlarged view of part II of FIG. FIG. 3 is an exploded perspective view of a main part of the EGR cooler.
The EGR cooler includes a core 6 composed of a large number of tubes 4 and a pair of header plates 5, a pair of upper and lower groove-shaped bodies 2 and 3, and a pair of flanges 14. In the core 6, both ends of a large number of tubes 4 arranged in parallel and spaced apart from each other are fixed in a liquid-tight and air-tight manner to a pair of header plates 5.
[0009]
The header plate 5 has a shallow pan shape in which an entire peripheral edge is raised and an annular peripheral wall portion 9 is formed thereon. The annular peripheral wall portion 9 is aligned with the inner surface of the boundary portion 10 of the groove-shaped main bodies 2 and 3 described later. The groove-shaped main bodies 2 and 3 have the same shape, and are formed to have the same width in which the edges of the side wall portions 1 are aligned with each other. The groove-shaped main bodies 2 and 3 are integrally formed by press molding, and tank portions 7 corresponding to half are respectively formed at both ends thereof, and an elongated casing portion 8 corresponding to half is formed at an intermediate portion. It is integrally formed.
In addition, the tank part 7 is formed in the three-dimensional taper whose tip is tapered.
[0010]
A bulging portion 11 is formed between the tank portion 7 and the casing portion 8. A boundary portion 10 exists at the boundary between the bulging portion 11 and the tank portion 7. An annular peripheral wall portion 9 of the header plate 5 of the core 6 is fitted on the inner surface side of the boundary portion 10. That is, the core 6 is inserted into the casing portion 8 of one channel main body 3, and the other channel main body 2 is fitted from above the core 6. And the edge part of the side wall part 1 of the groove-shaped main body 2 and the edge part of the side wall part 1 of the groove-shaped main body 3 are abutted and formed in a cylindrical shape. At this time, the annular peripheral wall portion 9 is positioned at the boundary portion 10 between the groove-shaped main body 2 and the groove-shaped main body 3 and is in contact with each other. Next, the openings 19 of the pair of flanges 14 are fitted to both ends of the cylindrical main bodies 2 and 3 that form a cylindrical shape, and the parts are assembled.
[0011]
Next, the side wall portion 1 and the butted portion of the groove body 2 are welded by TIG welding or the like, and at the boundary 10 of the groove bodies 2 and 3, the groove body 2 and the header plate 5 Weld together. At this time, the welded portion is formed in an annular shape at the boundary 10. In the example of FIG. 2, two annular welds 15 are formed in parallel. Further, the opening 19 of the flange 14 and the tip of the tank part 7 are welded by TIG welding or the like. Further, the inlet / outlet port 12 is formed in each of the groove-shaped main bodies 2 and 3, and an end portion of the pipe 13 is attached thereto, and the attaching portion is fixed by welding.
[0012]
The EGR cooler thus configured is interposed in an exhaust gas circulation path (not shown) via a pair of flanges 14, and the exhaust gas 17 flows in from one tank part 7, and the other tank part 7 via each tube 4. Circulate in In addition, the cooling water 18 flows from one pipe 13 and flows uniformly to the outer periphery of each tube 4 through the bulging portion 11, and flows out from the other pipe 13. The exhaust gas 17 is cooled by the cooling water 18.
[0013]
[Operation and effect of the invention]
The manufacturing method of the EGR cooler of the present invention and the EGR cooler are such that a tank portion 7 is provided at each end of each of the pair of groove-shaped main bodies 2 and 3, and a casing portion 8 is formed at an intermediate portion. Since the annular peripheral wall portion 9 of the header plate 5 is positioned at the boundary portion 10 between the bulging portion 11 and the tank portion 7 of the casing portion 8 and is joined by two-line welding, the number of parts is small. In addition, the welding is easy and the reliability of the welding is improved. Moreover, since the header plate 5 has the annular peripheral wall portion 9 raised on the outer periphery thereof, the header plate 5 has a certain width and can be easily welded to the annular peripheral wall portion 9 from the outer periphery of the groove-shaped main bodies 2 and 3. . Thereby, a highly reliable EGR cooler can be provided.
Furthermore, since the cross section of the tank part 7 is formed so as to be reduced from the boundary part 10 of the bulging part 11 of the casing part 8 to the front end side, the annular peripheral wall part 9 moves to the tank part 7 side. Therefore, the welding position can be easily specified even from the outer periphery of the casing to improve the reliability of welding.
[Brief description of the drawings]
FIG. 1 is a partially broken front view of an EGR cooler manufactured by a manufacturing method of the present invention.
FIG. 2 is an enlarged cross-sectional view of a portion II in FIG.
FIG. 3 is an exploded perspective view of a main part of an EGR cooler according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Side wall part 2, 3 Channel body 4 Tube 5 Header plate 6 Core 7 Tank part 8 Casing part 9 Annular peripheral wall part
10 border
11 bulge
12 doorway
13 Pipe
14 Flange
15 Annular weld
16 Butt weld
17 exhaust gas
18 Cooling water
19 opening

Claims (2)

夫々の側壁部(1)の縁どうしが互いに整合するように、細長い溝状にプレス形成した一対の溝形本体(2) (3) と、
多数のチューブ(4)の両端部を一対のヘッダープレート(5)に貫通固定したコア(6)と、を用意し、
夫々の溝形本体(2) (3) は、両端部に半分相当のタンク部(7) を形成すると共に、中間部に半分相当のケーシング部(8) を一体に形成し、
そのケーシング部 (8) の両端部に膨出部 (11) を一体に形成し、その膨出部 (11) に冷却用流体の出入口 (12) を開口し、
前記タンク部 (7) の横断面はそれとケーシング部 (8) の膨出部 (11) との境部 (10) から先端側に縮小するように形成し、
夫々のヘッダープレート(5)の全周縁を立ち上げて環状周壁部(9) を有する浅い鍋形に形成し且つ、その環状周壁部(9) の外面を、夫々のケーシング部(8) の前記膨出部 (11)とタンク部(7) との境部(10)の内周に整合するように形成し、
前記一対の溝形本体(2) (3) の側壁部の縁どうしを突き合わして、筒形に形成すると共に、そのケーシング部(8) に前記コア(6)を内装して、前記環状周壁部(9) を前記境部(10)に位置させ、
一対の溝形本体(2) (3) の突き合わせ部を溶接により接合すると共に、前記境部(10)の外周を環状に連続して、その外周から、ケーシング部 (8) の長手方向に離間した二つの位置で、二条に溶接接合したことを特徴とするＥＧＲクーラの製造方法。A pair of channel-shaped bodies (2) (3) press-formed into elongated grooves so that the edges of the respective side wall portions (1) are aligned with each other;
Prepare a core (6) that penetrates and fixes both ends of a number of tubes (4) to a pair of header plates (5),
Each channel-shaped main body (2) (3) forms a tank part (7) equivalent to half at both ends, and integrally forms a casing part (8) equivalent to half at the intermediate part,
The bulging portion (11) is integrally formed at both ends of the casing portion (8) , the cooling fluid inlet / outlet (12) is opened in the bulging portion (11) ,
The cross section of the tank part (7) is formed so as to shrink from the boundary part (10) between it and the bulging part (11) of the casing part (8 ) to the tip side,
The entire peripheral edge of each header plate (5) is raised to form a shallow pan shape having an annular peripheral wall portion (9), and the outer surface of the annular peripheral wall portion (9) is formed on the outer surface of each casing portion (8) . Formed so as to be aligned with the inner periphery of the boundary portion (10) between the bulging portion (11) and the tank portion (7),
The edges of the side walls of the pair of groove-shaped main bodies (2) (3) are abutted to form a cylindrical shape, and the core (6) is housed in the casing portion (8), and the annular peripheral wall Part (9) is located at the border (10),
The butted portions of the pair of channel main bodies (2) (3) are joined by welding, and the outer periphery of the boundary portion (10) is continuously annularly spaced from the outer periphery in the longitudinal direction of the casing portion (8). The manufacturing method of the EGR cooler characterized by having welded and joined to two strips in two positions . 請求項１に記載の製造方法により製造されたＥＧＲクーラ。An EGR cooler manufactured by the manufacturing method according to claim 1 .
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JP2007113795A (en) * 2005-10-18 2007-05-10 Usui Kokusai Sangyo Kaisha Ltd Multitubular heat exchanger for exhaust gas cooling device
JP4753715B2 (en) * 2005-12-28 2011-08-24 臼井国際産業株式会社 Multi-tube heat exchanger for exhaust gas cooling system
US9127895B2 (en) 2006-01-23 2015-09-08 MAHLE Behr GmbH & Co. KG Heat exchanger
JP2009523994A (en) * 2006-01-23 2009-06-25 ベール ゲーエムベーハー ウント コー カーゲー Heat exchanger
JP4817879B2 (en) * 2006-02-23 2011-11-16 マルヤス工業株式会社 Heat exchanger
ES2392302B1 (en) * 2009-11-30 2013-10-23 Valeo Térmico, S.A. HEAT EXCHANGER OF STACKED PLATES.
JP5923886B2 (en) 2011-07-20 2016-05-25 株式会社デンソー Exhaust cooling device
ES2421185B1 (en) * 2012-02-22 2014-08-11 Valeo Térmico, S. A. HEAT EXCHANGER FOR GASES, ESPECIALLY OF EXHAUST GASES OF AN ENGINE
JP2013185775A (en) * 2012-03-08 2013-09-19 Fuji Electric Co Ltd Distributor
KR101569820B1 (en) * 2014-05-27 2015-11-18 주식회사 코렌스 Egr cooler having body shell integrated with end tank part
KR102230075B1 (en) * 2015-02-16 2021-03-19 (주)다우정밀 Cooling water course type egr cooler

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