EP0772019B1 - Wärmetauscher mit Rohren mit ovalem oder länglichem Querschnitt und Verfahren zur dessen Herstellung - Google Patents

Wärmetauscher mit Rohren mit ovalem oder länglichem Querschnitt und Verfahren zur dessen Herstellung Download PDF

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Publication number
EP0772019B1
EP0772019B1 EP96117254A EP96117254A EP0772019B1 EP 0772019 B1 EP0772019 B1 EP 0772019B1 EP 96117254 A EP96117254 A EP 96117254A EP 96117254 A EP96117254 A EP 96117254A EP 0772019 B1 EP0772019 B1 EP 0772019B1
Authority
EP
European Patent Office
Prior art keywords
tube
axis
tubes
section
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.)
Expired - Lifetime
Application number
EP96117254A
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English (en)
French (fr)
Other versions
EP0772019A1 (de
Inventor
Michel Potier
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.)
Valeo Thermique Moteur SA
Original Assignee
Valeo Thermique Moteur SA
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 Valeo Thermique Moteur SA filed Critical Valeo Thermique Moteur SA
Publication of EP0772019A1 publication Critical patent/EP0772019A1/de
Application granted granted Critical
Publication of EP0772019B1 publication Critical patent/EP0772019B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F28F9/165—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by using additional preformed parts, e.g. sleeves, gaskets
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49373—Tube joint and tube plate structure
    • Y10T29/49375—Tube joint and tube plate structure including conduit expansion or inflation
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49377—Tube with heat transfer means
    • Y10T29/49378—Finned tube
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49391—Tube making or reforming
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53113—Heat exchanger
    • Y10T29/53122—Heat exchanger including deforming means

Definitions

  • the invention relates to a heat exchanger, in particular for a motor vehicle, and its assembly process.
  • a heat exchanger of the type comprising a multiplicity of tubes passing through fins and having ends inserted into holes of a collector plate with interposition of a seal compressible seal forming collars surrounding the ends of the tubes, and in which the ends of the tubes have an oval or oblong section defined by a major axis and a small axis.
  • Such heat exchangers are also called “exchangers heat to mechanical assembly "because the ends of the tubes are then flared to ensure compression of the joint flanges, which ensures the tightness of the connection tubes and the collector plate.
  • each tube at its end, has the disadvantage of hardening the metal constituting the tube and eventually lead to bursting of the wall of the tube during the subsequent flaring operation allowing mechanical assembly.
  • the object of the invention is in particular to overcome the drawbacks cited above.
  • the end of the tube is not shaped before assembly, that is to say before mounting the collector plate. It follows that, when introducing the ends of the tubes in the holes of the collector plate, the ends tubes have the same section as the latter.
  • the length of the tube devoid of fins, can be made very small, which increases the surface useful of the tube bundle.
  • the section end of the tube, before assembly is equal to the section of the tube.
  • the end section of the tube is not conformed before assembly.
  • the compression of the joint collar sealing in the direction of the major axis is carried out before introduction of the end of the tube, while the compression of the seal collar in the direction of the minor axis results from the flaring of the tube during assembly of the heat exchanger.
  • the major axis of the tube is greater than the major inner axis of the collar of the joint before compression, while the minor axis of the tube is lower than the small inner axis of the front seal collar compression.
  • the invention relates to a method assembly of a heat exchanger of the defined type previously.
  • the end section of each tube before assembly is identical to the section of the tube.
  • operation c) of compression of the collar of the joint in the direction of a major axis is carried out at by means of a punch which has a free end suitable for enter the end of the corresponding tube, without the deform.
  • operation d) of introducing the ends of the tubes is carried out by moving the collecting plate by means of of a bailer.
  • the invention also provides that operation e) of flaring is made by means of a punch which widens the end of the tube in the direction of the minor axis.
  • the heat exchanger shown in Figures 1 and 3 includes a bundle 10 formed of a multiplicity of tubes 12 of oval section which are arranged parallel to each other and in a single row.
  • the tubes 12 pass through a multiplicity fins 14 formed by metal plates substantially rectangular perpendicular to each other.
  • Each tube 12 has a free end 16 assembled mechanically to a header plate 18, also called “collector”. Before assembling the tubes and the plate manifold, the ends 16 of the tubes have exactly the same section as the tubes, in the current part receiving the fins 14.
  • the collector plate 18 comprises a shaped core 20 general rectangular delimiting a multiplicity of holes 22, of oval section, suitable for receiving the ends 16 tubes. Each hole 22 is surrounded by a directed collar 24 on the side of the fins 14.
  • the core 20 is extended by a peripheral gutter 26 delimiting a groove and ending with a peripheral rim 28 forming folding legs.
  • the collector plate 18 receives a compressible seal 30 comprising a core 32 which is applied to the core 20 of the collector plate.
  • This core 32 is connected to a multiplicity of collars 34 which each enter a hole 22 to ensure the seal between the end 16 of a tube and the collar 24 corresponding.
  • the core 32 forms at its periphery a bead 36 disposed in the gutter 26 and suitable for seal with a manifold (not shown) when the peripheral rim 28 is folded down.
  • the section of the end 16 of the tube has a substantially oval shape characterized by a major axis T'1 (after assembly) and a minor axis T'2 (after assembly).
  • the major axis T'1 is equal to the major axis T1 ( Figure 7) of the section 16 of the end of the tube before assembly, this section being identical to that of the tubes in its part current.
  • the minor axis T'2 is greater than the minor axis T2 before assembly (figure 7), because it underwent a first radial flare.
  • a second localized radial flare which results in the presence of two bulges 38, as can be seen on Figures 1, 2 and 3 and which limit the displacement of the tube relative to the collector.
  • each collar 34 of the seal 30 Before assembly, each collar 34 of the seal 30 is in the state uncompressed. It has a large internal axis J1 (figure 5) which is less than the major axis T1 of the end 16 of the tube ( Figure 7). It also has a small axis J2 (figure 5) which is greater than the minor axis T2 of the end of the tube (figure 7).
  • the collecting plate 18 fitted of its joint 30 is placed near the bundle 10, of so that the holes 22 are opposite the ends 16 of the tubes.
  • a multiplicity of punches 40 which each have a body 42 of oval section provided with an end 44 suitable for enter an end 16 of a tube 12, without the deform.
  • the punch 42 is designed to exert compression on inside the collar 34 only in the direction of its major axis so that this major axis passes from the value J1 (figure 5) to a value J'1 (figure 6) which corresponds to the T1 value of the long axis of the tube to facilitate insertion of the tube according to a joint pre-stressing process.
  • this prestressing of the joint is only carried out in the direction of its major axis. Indeed, it is not necessary to exert a prestress in the direction of the minor axis since the minor axis J2 of the compressible collar (Figure 5) is greater than or equal to the minor axis T2 of the end 16 of the tube.
  • a presser 46 which is moved in the direction of arrow F2 and which is supported on the core 32 of the compressible seal 30.
  • the displacement of the presser 46 causes the displacement of the collector plate 18-compressible seal 30 assembly, if although each end 16 is introduced into a collar 30 previously compressed in the direction of its major axis.
  • each of the collars 34 is compressed in the direction of its major axis, but not in the direction of its minor axis.
  • This flare allows to exert a compression on the collar 34 in the direction of its minor axis.
  • each tube is conformed only after assembly and that this conformation is obtained only by a flaring in the direction of the minor axis.
  • this flaring relates to the large radius faces of the section of the tube, which eliminates the problems of work hardening.
  • the invention is particularly applicable to the production of heat exchangers for motor vehicles, in particular for cooling radiators or heater.

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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)

Claims (9)

  1. Wärmetauscher vom Typ mit einer Vielzahl von Rohren (12), deren Querschnitt von ovaler oder gestreckter Form ist und eine große Achse (T1) sowie eine kleine Achse (T2) aufweist, wobei die Rohre Lamellen (14) durchqueren und Enden (16) aufweisen, die in Löcher (22) einer Sammelplatte (18) unter Zwischenfügung einer zusammendrückbaren Dichtung (30) eingeführt sind, wobei Kragen (34) gebildet werden, welche die Enden (16) der Rohre umgeben, dadurch gekennzeichnet, dass die große Achse (T'1) am Ende (16) des Rohres (12) gleich der großen Achse (T1) des Rohres ist, während die kleine Achse (T'2) des Endes (16) des Rohres (12) größer als die kleine Achse (T2) des Rohres ist, als Folge einer Aufweitung des Rohres beim Zusammenbau des Wärmetauschers.
  2. Wärmetauscher nach Anspruch 1, dadurch gekennzeichnet, dass der Querschnitt des Endes (16) des Rohres (12) vor dem Zusammenbau gleich dem Querschnitt des Rohres (12) ist.
  3. Wärmetauscher nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Zusammendrückung des Kragens (34) der Dichtung in der Richtung der großen Achse (J1) vor dem Einführen des Endes (16) des Rohres (12) erfolgt, während die Zusammendrückung des Kragens (34) der Dichtung (30) in der Richtung der kleinen Achse (J2) infolge der Aufweitung des Rohres (12) beim Zusammenbau des Wärmetauschers geschieht.
  4. Wärmetauscher nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die große Achse (T1) des Rohres größer als die innere große Achse (J1) des Kragens (34) der Dichtung (30) vor dem Zusammendrücken ist und dass die kleine Achse (T2) des Rohres (12) kleiner als die innere kleine Achse (J2) des Kragens (34) der Dichtung vor dem Zusammendrücken ist.
  5. Verfahren für den Zusammenbau eines Wärmetauschers nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass es die folgenden Schritte umfaßt:
    a) eine Vielzahl von Rohren (12) wird vorgesehen, die Lamellen (14) durchqueren und von denen jedes einen ovalen oder gestreckten Querschnitt aufweist, der durch eine große Achse (T1) und eine kleine Achse (T2) definiert ist, und jedes ein freies Ende (16) aufweist;
    b) eine Sammelplatte (18) wird vorgesehen, die mit Löchern (22) von ovalem oder gestrecktem Querschnitt versehen ist und mit einer zusammendrückbaren Dichtung (30) ausgestattet ist, die Kragen (34) bilden, welche jeweils quer durch die Löcher (22) eingesetzt werden können;
    c) jeder Kragen (34) der Dichtung (30) wird in Richtung seiner großen Achse (J1) zusammengedrückt;
    d) die jeweiligen Enden (16) der Rohre (12) werden in die Löcher (22) der Sammelplatte (18) und die Kragen (34) der Dichtung (30) eingeführt, wobei letztere in Richtung der großen Achse zusammengedrückt gehalten werden;
    e) die Enden (16) der Rohre (12) werden einer Aufweitung in Richtung ihrer kleinen Achse unterzogen, um das Zusammendrücken des Kragens (34) der Dichtung in dieser Richtung zu gewährleisten.
  6. Verfahren nach Anspruch 5, dadurch gekennzeichnet, dass in dem Schritt a) der Querschnitt des Endes (16) jedes Rohres (12) vor dem Zusammenbauen identisch mit dem Querschnitt des Rohres (12) übereinstimmt.
  7. Verfahren nach Anspruch 5 oder 6, dadurch gekennzeichnet, dass der Schritt c), bei dem der Kragen (34) der Dichtung (30) in der Richtung seiner großen Achse zusammengedrückt wird, mittels eines Stempels (40) ausgeführt wird, der ein freies Ende (44) aufweist, welches in das Ende (16) des entsprechenden Rohres (12) ohne Verformung desselben einführbar ist.
  8. Verfahren nach einem der Ansprüche 5 bis 7, dadurch gekennzeichnet, dass der Schritt d), bei dem die Enden (16) der Rohre (12) eingeführt werden, durch Bewegung der Sammelplatte (18) mittels einer Presse (46) erfolgt.
  9. Verfahren nach einem der Ansprüche 5 bis 8, dadurch gekennzeichnet, dass der Aufweitungsschritt e) mittels eines Stempels (48) durchgeführt wird, welcher das Ende (16) des Rohres (12) in der Richtung der kleinen Achse aufweitet.
EP96117254A 1995-11-02 1996-10-28 Wärmetauscher mit Rohren mit ovalem oder länglichem Querschnitt und Verfahren zur dessen Herstellung Expired - Lifetime EP0772019B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9512949A FR2740869B1 (fr) 1995-11-02 1995-11-02 Echangeur de chaleur a tubes de section ovale ou oblongue et son procede d'assemblage
FR9512949 1995-11-02

Publications (2)

Publication Number Publication Date
EP0772019A1 EP0772019A1 (de) 1997-05-07
EP0772019B1 true EP0772019B1 (de) 2000-08-30

Family

ID=9484165

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96117254A Expired - Lifetime EP0772019B1 (de) 1995-11-02 1996-10-28 Wärmetauscher mit Rohren mit ovalem oder länglichem Querschnitt und Verfahren zur dessen Herstellung

Country Status (6)

Country Link
US (2) US5901784A (de)
EP (1) EP0772019B1 (de)
BR (1) BR9605375A (de)
DE (1) DE69610059T2 (de)
FR (1) FR2740869B1 (de)
MX (1) MX9605319A (de)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
FR2825458A1 (fr) 2001-05-16 2002-12-06 Behr Gmbh & Co Echangeur de chaleur et procede pour sa fabrication

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US9623471B2 (en) * 2010-10-08 2017-04-18 Carrier Corporation Furnace heat exchanger attachment
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CN105164487B (zh) * 2013-04-09 2017-08-01 松下知识产权经营株式会社 导热鳍片、热交换器以及冷冻循环装置
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US10317142B2 (en) * 2014-08-25 2019-06-11 Hanon Systems Heat exchanger having a mechanically assembled header
US10082348B2 (en) * 2014-09-23 2018-09-25 Enterex America LLC Heat exchanger tube-to-header sealing system
DE102014219401A1 (de) * 2014-09-25 2016-03-31 Mahle International Gmbh Anordnung für eine Temperiereinrichtung sowie Temperiereinrichtung
US20160146551A1 (en) 2014-11-26 2016-05-26 Enterex America LLC Heat exchanger assembly
FR3037388B1 (fr) * 2015-06-12 2019-07-26 Valeo Systemes Thermiques Ailette d'un echangeur thermique notamment pour vehicule automobile, et echangeur thermique correspondant
FR3037643B1 (fr) * 2015-06-22 2019-07-12 Valeo Systemes Thermiques Echangeur de chaleur et procede de fabrication associe
FR3056733A1 (fr) * 2016-09-28 2018-03-30 Valeo Systemes Thermiques Echangeur de chaleur et procede de fabrication associe
DE102017202667B4 (de) * 2017-02-20 2020-03-05 Hanon Systems Wärmetauscher

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2825458A1 (fr) 2001-05-16 2002-12-06 Behr Gmbh & Co Echangeur de chaleur et procede pour sa fabrication
DE10123675B4 (de) 2001-05-16 2019-05-29 Mahle International Gmbh Wärmeübertrager

Also Published As

Publication number Publication date
BR9605375A (pt) 1998-07-28
US5901784A (en) 1999-05-11
EP0772019A1 (de) 1997-05-07
US6044554A (en) 2000-04-04
MX9605319A (es) 1997-08-30
DE69610059D1 (de) 2000-10-05
DE69610059T2 (de) 2001-04-12
FR2740869A1 (fr) 1997-05-09
FR2740869B1 (fr) 1997-12-19

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