JPH0814787A - Manufacture of heat exchanger - Google Patents

Manufacture of heat exchanger

Info

Publication number
JPH0814787A
JPH0814787A JP17330694A JP17330694A JPH0814787A JP H0814787 A JPH0814787 A JP H0814787A JP 17330694 A JP17330694 A JP 17330694A JP 17330694 A JP17330694 A JP 17330694A JP H0814787 A JPH0814787 A JP H0814787A
Authority
JP
Japan
Prior art keywords
tube
flat
plate
flat tubes
heat exchanger
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.)
Pending
Application number
JP17330694A
Other languages
Japanese (ja)
Inventor
Yoshio Tomizawa
良夫 富沢
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyo Radiator Co Ltd
Original Assignee
Toyo Radiator Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyo Radiator Co Ltd filed Critical Toyo Radiator Co Ltd
Priority to JP17330694A priority Critical patent/JPH0814787A/en
Publication of JPH0814787A publication Critical patent/JPH0814787A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
    • F28F9/185—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding with additional preformed parts

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)

Abstract

PURPOSE:To facilitate work and, what is more, to enhance reliability by forming a tube insertion hole in such a fashion that the size of the hole may be larger than the outer peripheral size of a flat tube to a satisfactory extent and arranging the ends of a large number of flat tubes to be inserted into the tube insertion holes simultaneously. CONSTITUTION:A tube plate 4 is laid out on both ends of a core 3 while tube insertion holes 5, which are larger than the cross section-outer periphery of flat tubes 2, are formed on the tube plates 4. Preferably, a clearance between the tube insertion holes 5 and the flat tubes 2 is so designed that a large number of flat tubes 2 may be inserted into their respective tube insertion holes simultaneously. A side member 12 is laid out on both ends of the tube plates 4 in the longitudinal direction or a pair of upper and lower tube plates are temporarily fixed over a specified spacing. Then, a small ring-shaped plate 7 is mounted to both ends of the flat tubes 2 where plate-like flat holes are bored on the plates in the center. The inner periphery of the flat holes are adapted so as to be joined with the outer periphery of the flat tubes tightly.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、建設機械用大型オイル
クーラのような熱交換器であって、それに用いられるチ
ューブとチューブプレートとの接合構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger such as a large oil cooler for construction machinery, and to a joint structure of tubes and tube plates used therein.

【０００２】[0002]

【従来の技術】建設機械用大型オイルクーラとして用い
る熱交換器は、ステンレス鋼を使用し、次のようにして
製造していた。先ず、夫々多数の偏平孔を有するプレー
トフィンを小隙を有して並列させ、夫々の偏平孔に偏平
チューブを貫通し、多数の偏平チューブとフィンとを一
体化してコアを構成する。そして、夫々のチューブの両
端をチューブプレートのチューブ挿通孔に挿通し、その
挿通部を銅ろう付けにより液密に接合していた。次い
で、チューブプレート外周にパッキンを介してタンク本
体の開口部を被嵌し、チューブプレートとタンク本体及
びサイドメンバーとの間を締結固定することにより熱交
換器を完成していた。2. Description of the Related Art A heat exchanger used as a large oil cooler for a construction machine uses stainless steel and is manufactured as follows. First, plate fins each having a large number of flat holes are arranged in parallel with each other with a small gap, and the flat tubes are passed through the respective flat holes, and a large number of the flat tubes and the fins are integrated to form a core. Then, both ends of each tube are inserted into the tube insertion holes of the tube plate, and the insertion portions are liquid-tightly joined by copper brazing. Next, the heat exchanger was completed by fitting the opening of the tank main body on the outer periphery of the tube plate via a packing, and fastening and fixing the tube plate, the tank main body, and the side member.

【０００３】[0003]

【発明が解決しようとする課題】このようなステンレス
製熱交換器のチューブとチューブプレートとの銅ろう付
けは、そのクリアランスを極めて小さく保持する必要が
ある。ところが、熱交換器はチューブとフィンとを一体
的に接合固定した後に、多数のチューブの端部をチュー
ブプレートの各チューブ挿通孔に同時に挿通する必要が
ある。その挿通を容易にするためには、チューブ挿通孔
の大きさをチューブ外周よりもある程度以上大きくし、
両者間に隙間を開ける必要がある。すると、銅ろう付け
の際にチューブ挿通孔とチューブ外面との隙間を完全に
埋めきれない場合が存在し、その場合には再度ろう付け
作業を要し、作業性及び信頼性に欠ける欠点があった。
そこで本発明は、製造し易く且つ信頼性の高いろう付け
構造を提供することを目的とし、その目的達成のために
次の構成をとる。The copper brazing between the tube and the tube plate of such a heat exchanger made of stainless steel needs to keep the clearance extremely small. However, in the heat exchanger, after the tubes and the fins are integrally bonded and fixed, it is necessary to simultaneously insert the end portions of many tubes into the tube insertion holes of the tube plate. In order to facilitate the insertion, make the size of the tube insertion hole larger than the outer circumference of the tube to some extent,
It is necessary to open a gap between them. Then, there is a case where the gap between the tube insertion hole and the tube outer surface cannot be completely filled up during copper brazing.In that case, brazing work is required again, and there is a drawback that workability and reliability are lacking. It was
Therefore, an object of the present invention is to provide a brazing structure that is easy to manufacture and has high reliability, and has the following configuration to achieve the object.

【０００４】[0004]

【課題を解決するための手段】本発明の熱交換器の製造
方法は、並列された多数の偏平チューブ２の外面間に多
数のフィン１が固定されてコア３を構成し、夫々の前記
偏平チューブ２の端部をチューブプレート４の夫々のチ
ューブ挿通孔５に挿通し、その挿通部を液密に接合する
こととした熱交換器の製造方法において、前記偏平チュ
ーブ２の端部が前記チューブ挿通孔５に挿入されたと
き、その挿通孔内面と偏平チューブ外面との間に比較的
大きな隙間６が形成されるように、前記チューブプレー
ト４の前記チューブ挿通孔５の内周の大きさを前記偏平
チューブ２の外周の大きさより充分大きく形成してお
き、前記コアの形成後に、夫々の前記偏平チューブ２の
端部を前記チューブプレート４の前記チューブ挿通孔５
に同時に挿通する工程と、次いで、夫々平面外周が前記
挿通孔５よりも充分大きく且つ、内周孔が前記偏平チュ
ーブ外周に密に整合する多数の独立した環状小プレート
７を、夫々前記偏平チューブ端外周に嵌着して、その平
面を前記チューブプレート４内面に接触させる工程と、
前記環状小プレート７を介して前記チューブプレート４
と前記偏平チューブ端部とを液密にろう付け接合する工
程と、を具備するものである。また、本発明の好ましい
実施態様は、熱交換器がステンレス鋼からなり、外周面
に予め銅ろうメッキが被覆された環状小プレート７を用
いる。そしてその銅ろうを溶融し次いで固化して、偏平
チューブ端部とチューブプレート４とを環状小プレート
７を介して液密にろう付け固定するものである。In the method for manufacturing a heat exchanger according to the present invention, a large number of fins 1 are fixed between the outer surfaces of a large number of parallel flat tubes 2 to form a core 3, and each of the flat plates is formed. In the method for manufacturing a heat exchanger, in which the ends of the tubes 2 are inserted into the respective tube insertion holes 5 of the tube plate 4 and the insertion parts are liquid-tightly joined, the ends of the flat tubes 2 are the tubes. The inner peripheral size of the tube insertion hole 5 of the tube plate 4 is set so that a relatively large gap 6 is formed between the inner surface of the insertion hole and the outer surface of the flat tube when inserted into the insertion hole 5. The flat tubes 2 are formed to have a size sufficiently larger than the outer circumference of the flat tubes 2, and after the cores are formed, the end portions of the flat tubes 2 are inserted into the tube insertion holes 5 of the tube plate 4.
At the same time, and then a plurality of independent annular small plates 7 whose plane outer circumferences are sufficiently larger than the insertion holes 5 and whose inner circumference holes closely align with the outer circumference of the flat tubes, respectively. A step of fitting on the outer circumference of the end and bringing its flat surface into contact with the inner surface of the tube plate 4,
The tube plate 4 through the annular small plate 7
And a step of liquid-tightly brazing and joining the flat tube end portion. Further, in a preferred embodiment of the present invention, the heat exchanger is made of stainless steel, and an annular small plate 7 whose outer peripheral surface is previously coated with copper brazing is used. Then, the copper brazing material is melted and then solidified, and the flat tube end portion and the tube plate 4 are liquid-tightly brazed and fixed via the annular small plate 7.

【０００５】[0005]

【実施例】次に、図面に基づいて本発明の実施例につき
説明する。図１は本方法により製造された熱交換器の要
部縦断面図であり、図２はそのタンク本体８を取り除い
た状態の斜視略図である。この熱交換器は、建設機械等
の大型オイルクーラとして用いられるステンレス製熱交
換器である。コア３は多数のプレート型のフィン１と、
それに挿通固定された偏平チューブ２とからなる。フィ
ン１は、夫々同一形状で偏平チューブ２外周に整合する
偏平孔が多数穿設されると共に、その口縁部が僅かに立
ち上げ形成された図示しないバーリング加工部を有す
る。そのような多数のプレート型のフィン１を、バーリ
ング加工高さだけ間隙をあけて並列させ、夫々の偏平孔
内に偏平チューブ２を挿入し、フィン１と偏平チューブ
２との間を伝熱的に固定する。Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a vertical cross-sectional view of a main part of a heat exchanger manufactured by this method, and FIG. 2 is a schematic perspective view of the heat exchanger with the tank body 8 removed. This heat exchanger is a stainless steel heat exchanger used as a large oil cooler for construction machines and the like. The core 3 includes a large number of plate-shaped fins 1,
The flat tube 2 is inserted and fixed therein. The fin 1 has a plurality of flat holes each having the same shape and aligned with the outer periphery of the flat tube 2, and has a burring portion (not shown) in which the rim of the fin 1 is slightly raised. A large number of such plate-type fins 1 are arranged side by side with a gap corresponding to the burring height, and the flat tubes 2 are inserted into the respective flat holes, so that heat is transferred between the fins 1 and the flat tubes 2 by heat transfer. Fixed to.

【０００６】そして、コア３の両端部にチューブプレー
ト４を配置する。このチューブプレート４には、偏平チ
ューブ２の断面外周よりも大きなチューブ挿通孔５が形
成されている。なお、このチューブ挿通孔５と偏平チュ
ーブ２とのクリアランスは、多数の偏平チューブ２を夫
々のチューブ挿通孔５に同時に挿通が容易である程度の
ものである。そして、チューブプレート４の長手方向両
側にはサイドメンバー12が配置されるか、或いは適宜な
治具で上下一対のチューブプレート４（下方を省略）間
が所定距離に仮固定される。次いで、夫々の偏平チュー
ブ２の両端には環状小プレート７が嵌着される。環状小
プレート７は、ステンレス鋼板のプレス成形体からな
り、平板状で且つ中心に偏平孔が穿設されている。この
偏平孔の内周は、偏平チューブ２の断面外周に密に接合
する。即ち、その隙間が０．０１〜０．１ｍｍ程度に形
成される。又、環状小プレート７の外周はこの実施例で
は、偏平孔に相似形に形成されているが、それを長方形
にしてもよい。Then, the tube plates 4 are arranged on both ends of the core 3. The tube plate 4 is provided with a tube insertion hole 5 larger than the outer circumference of the flat tube 2 in cross section. The clearance between the tube insertion holes 5 and the flat tubes 2 is such that a large number of flat tubes 2 can be easily inserted into the respective tube insertion holes 5 at the same time. Then, the side members 12 are arranged on both sides of the tube plate 4 in the longitudinal direction, or the pair of upper and lower tube plates 4 (below is omitted) is temporarily fixed to a predetermined distance by an appropriate jig. Next, the annular small plates 7 are fitted to both ends of each flat tube 2. The annular small plate 7 is made of a press-formed body of stainless steel plate, has a flat plate shape, and has a flat hole at the center. The inner circumference of the flat hole is closely joined to the outer circumference of the cross section of the flat tube 2. That is, the gap is formed to about 0.01 to 0.1 mm. Further, in this embodiment, the outer periphery of the annular small plate 7 is formed in a shape similar to the flat hole, but it may be rectangular.

【０００７】環状小プレート７の板厚は、一例として２
〜４ｍｍ程度とすることができる。この環状小プレート
７には、予め銅ろうメッキが施されている。そして、環
状小プレート７の平面をチューブプレート４の平面に接
触させておく。このようにして組立られた熱交換器は、
高温の炉内に挿入され或いは、バーナーにより環状小プ
レート７の表面に被覆されたろう材を溶融し、毛管現象
によりそのろう材を環状小プレート７と偏平チューブ２
との隙間及び、環状小プレート７とチューブプレート４
との接触面に保持させる。次いで、全体を冷却させるこ
とにより、偏平チューブ２の端部とチューブプレート４
とを環状小プレート７を介して液密にろう付け固定す
る。そして、図１の如くコア３の長手方向両端部にサイ
ドメンバー12を配置すると共に、パッキン９を介してチ
ューブプレート４の外周にタンク本体８の開口縁を被嵌
し、ボルト10を介してタンク本体８とチューブプレート
４とサイドメンバー12との間を一体的に締結固定し、熱
交換器を完成する。The thickness of the annular small plate 7 is, for example, 2
It can be set to about 4 mm. The annular small plate 7 is preliminarily plated with copper brazing. Then, the flat surface of the annular small plate 7 is brought into contact with the flat surface of the tube plate 4. The heat exchanger assembled in this way is
The brazing material, which is inserted into a high-temperature furnace or coated on the surface of the annular small plate 7 by a burner, is melted, and the brazing material is capillarized to the annular small plate 7 and the flat tube 2.
And the small annular plate 7 and tube plate 4
Hold on the contact surface with. Then, by cooling the whole, the end of the flat tube 2 and the tube plate 4
And are liquid-tightly brazed and fixed via the annular small plate 7. Then, as shown in FIG. 1, side members 12 are arranged at both ends of the core 3 in the longitudinal direction, and the opening edge of the tank body 8 is fitted on the outer periphery of the tube plate 4 through the packing 9 and the tank 10 through the bolt 10. The heat exchanger is completed by integrally fastening and fixing the main body 8, the tube plate 4, and the side member 12.

【０００８】[0008]

【発明の作用・効果】本発明の熱交換器の製造方法は、
チューブプレート４の夫々のチューブ挿通孔５の大きさ
が偏平チューブ２の外周の大きさよりも充分大きく形成
され、夫々のチューブ挿通孔５にコア３の多数の偏平チ
ューブ２の端部が同時に挿通するように構成したから、
チューブプレート４をコア３の偏平チューブ２の端部に
装着させる作業が極めて容易となる。即ち、夫々のチュ
ーブ挿通孔５が充分大きく形成されているから、多数の
偏平チューブ２とフィン１が一体化されたコア３におい
て、夫々の偏平チューブ２間のピッチが多少変化しても
夫々の偏平チューブ２端部を同時にチューブ挿通孔５に
挿通可能である。しかも、夫々の偏平チューブ２の端部
に装着される環状小プレート７は、夫々互いに独立して
偏平チューブ端外周に嵌着されるものであるから、その
内周孔が偏平チューブ２の外周に密に整合するものであ
っても、容易にそれを偏平チューブ２に嵌着することが
できる。それにより、偏平チューブ２と環状小プレート
７とのろう付けを確実に行うことができると共に、環状
小プレート７とチューブプレート４との接触部のろう付
けが同時に可能である。その結果、環状小プレート７を
介してチューブプレート４と偏平チューブ２との液密な
ろう付けが可能であり、そのろう付けの信頼性が極めて
高い。The operation and effect of the present invention is as follows.
The size of each tube insertion hole 5 of the tube plate 4 is formed sufficiently larger than the size of the outer circumference of the flat tube 2, and the ends of the large number of flat tubes 2 of the core 3 are inserted into the respective tube insertion holes 5 at the same time. Because it was configured like
The work of attaching the tube plate 4 to the end of the flat tube 2 of the core 3 becomes extremely easy. That is, since the respective tube insertion holes 5 are formed sufficiently large, in the core 3 in which a large number of flat tubes 2 and fins 1 are integrated, even if the pitch between the flat tubes 2 changes to some extent. The end portion of the flat tube 2 can be inserted into the tube insertion hole 5 at the same time. Moreover, since the annular small plates 7 attached to the ends of the respective flat tubes 2 are fitted to the outer circumference of the flat tube ends independently of each other, their inner peripheral holes are formed on the outer circumference of the flat tube 2. Even if they are closely aligned, they can be easily fitted to the flat tube 2. Thereby, the flat tube 2 and the annular small plate 7 can be reliably brazed, and the contact portion between the annular small plate 7 and the tube plate 4 can be brazed at the same time. As a result, the tube plate 4 and the flat tube 2 can be liquid-tightly brazed via the small annular plate 7, and the reliability of the brazing is extremely high.

【図面の簡単な説明】[Brief description of drawings]

【図１】本製造方法により製作された熱交換器の要部縦
断面図。FIG. 1 is a longitudinal sectional view of a main part of a heat exchanger manufactured by the present manufacturing method.

【図２】同熱交換器であって、タンク本体を取り除いた
状態の要部斜視略図。FIG. 2 is a schematic perspective view of an essential part of the heat exchanger with the tank body removed.

【符号の説明】[Explanation of symbols]

１ フィン ２ 偏平チューブ ３ コア ４ チューブプレート ５ チューブ挿通孔 ６ 隙間 ７ 環状小プレート ８ タンク本体 ９ パッキン 10 ボルト 11 ボルト孔 12 サイドメンバー 1 Fin 2 Flat Tube 3 Core 4 Tube Plate 5 Tube Insertion Hole 6 Gap 7 Small Ring Plate 8 Tank Body 9 Packing 10 Bolt 11 Bolt Hole 12 Side Member

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 並列された多数の偏平チューブ２の外面
間に多数のフィン１を固定してコア３を構成し、 夫々の前記偏平チューブ２の端部をチューブプレート４
の夫々のチューブ挿通孔５に挿通し、その挿通部を液密
に接合することとした熱交換器の製造方法において、 前記偏平チューブ２の端部が前記チューブ挿通孔５に挿
入されたとき、その挿通孔内面と偏平チューブ外面との
間に比較的大きな隙間６が形成されるように、前記チュ
ーブプレート４の前記チューブ挿通孔５の内周の大きさ
を前記偏平チューブ２の外周の大きさより充分大きく形
成しておき、 前記コアの形成後に、夫々の前記偏平チューブ２の端部
を前記チューブプレート４の前記チューブ挿通孔５に同
時に挿通する工程と、 次いで、夫々平面外周が前記チューブ挿通孔５よりも充
分大きく且つ、内周孔が前記偏平チューブ２外周に密に
整合する多数の独立した環状小プレート７を、夫々前記
偏平チューブ端外周に嵌着して、その平面を前記チュー
ブプレート４内面に接触させる工程と、 前記環状小プレート７を介して前記チューブプレート４
と前記偏平チューブ端部とを液密にろう付け接合する工
程と、を具備する熱交換器の製造方法。1. A core 3 is constructed by fixing a large number of fins 1 between the outer surfaces of a plurality of flat tubes 2 arranged in parallel, and an end portion of each of the flat tubes 2 is attached to a tube plate 4.
In the method of manufacturing the heat exchanger, which is configured to be inserted into each of the tube insertion holes 5 and liquid-tightly join the insertion parts, when the end of the flat tube 2 is inserted into the tube insertion hole 5, The size of the inner circumference of the tube insertion hole 5 of the tube plate 4 is made larger than the size of the outer circumference of the flat tube 2 so that a relatively large gap 6 is formed between the inner surface of the insertion hole and the outer surface of the flat tube 2. Forming the core sufficiently large, and inserting the ends of the flat tubes 2 into the tube insertion holes 5 of the tube plate 4 at the same time after forming the cores; 5, a plurality of independent annular small plates 7 whose inner peripheral holes are closely aligned with the outer periphery of the flat tube 2 are fitted to the outer periphery of the flat tube, respectively. Contacting a surface on the tube plate 4 inner surface, said through said annular small plate 7 tube plates 4
And a step of brazing and joining the end portion of the flat tube in a liquid tight manner. 【請求項２】 請求項１において、熱交換器がステンレ
ス鋼からなり、外周面に予め銅ろうメッキが被覆された
前記環状小プレート７を用い、その銅ろうを溶融し次い
で固化して、前記偏平チューブ端部と前記チューブプレ
ート４とを前記環状小プレート７を介して液密に固定す
る熱交換器の製造方法。2. The heat exchanger according to claim 1, wherein the annular small plate 7 is made of stainless steel and the outer peripheral surface of which is previously coated with copper brazing, the copper brazing is melted and then solidified, A method for manufacturing a heat exchanger in which a flat tube end portion and the tube plate 4 are liquid-tightly fixed via the annular small plate 7.
JP17330694A 1994-06-30 1994-06-30 Manufacture of heat exchanger Pending JPH0814787A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17330694A JPH0814787A (en) 1994-06-30 1994-06-30 Manufacture of heat exchanger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17330694A JPH0814787A (en) 1994-06-30 1994-06-30 Manufacture of heat exchanger

Publications (1)

Publication Number Publication Date
JPH0814787A true JPH0814787A (en) 1996-01-19

Family

ID=15958009

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17330694A Pending JPH0814787A (en) 1994-06-30 1994-06-30 Manufacture of heat exchanger

Country Status (1)

Country Link
JP (1) JPH0814787A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102028433B1 (en) * 2018-08-14 2019-10-04 유춘성 Tube joint structure of heat exchanger of boiler using for sealing material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102028433B1 (en) * 2018-08-14 2019-10-04 유춘성 Tube joint structure of heat exchanger of boiler using for sealing material

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