EP0567399A1 - Heat exchanger tube with integrated perturbation device - Google Patents

Heat exchanger tube with integrated perturbation device Download PDF

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Publication number
EP0567399A1
EP0567399A1 EP93401034A EP93401034A EP0567399A1 EP 0567399 A1 EP0567399 A1 EP 0567399A1 EP 93401034 A EP93401034 A EP 93401034A EP 93401034 A EP93401034 A EP 93401034A EP 0567399 A1 EP0567399 A1 EP 0567399A1
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EP
European Patent Office
Prior art keywords
strip
heat exchanger
exchanger tube
marginal parts
tube
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.)
Withdrawn
Application number
EP93401034A
Other languages
German (de)
French (fr)
Inventor
Pascal Velluet
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 EP0567399A1 publication Critical patent/EP0567399A1/en
Withdrawn legal-status Critical Current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
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/0803—Making tubes with welded or soldered seams the tubes having a special shape, e.g. polygonal tubes
    • 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
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/03—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
    • F28D1/0391—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits a single plate being bent to form one or more conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation

Definitions

  • the invention relates to heat exchangers of the tubular type, that is to say comprising a bundle formed of a multiplicity of tubes intended to be traversed by a fluid.
  • Heat exchangers of this type are used in particular in motor vehicles to provide either cooling of the engine, or heating of the passenger compartment, or even conditioning of the air in the passenger compartment.
  • the invention relates to a heat exchanger tube comprising an integrated disturbing device capable of generating turbulence when a fluid flows through this tube.
  • a known solution for this consists in introducing into the tube, after its manufacture, an additional part called a “disruptor” or “turbulator” and possibly then fixing this part inside the tube, for example by brazing.
  • This solution is not satisfactory because it requires a particular operation for mounting a disturbing device inside each tube.
  • EP-A-0 302 232 is a heat exchanger tube comprising a metal strip rolled and welded on itself which has a part extending inside the tube to form a device disruptor capable of generating turbulence on a fluid circulating in the tube.
  • the disturbing device is formed by a part of the strip itself, which avoids the need for an additional part as in the case of the solution mentioned above.
  • the object of the invention is in particular to overcome the aforementioned drawbacks.
  • a heat exchanger tube of the type defined above in which the strip has two marginal parts extending on either side of a central part, at least one of the marginal parts forming disturbing device and each of the marginal parts being folded, along a folding edge, towards the central part, and in which the two folding edges are brought towards each other by winding the central part and the parts edges of the strip and welded to each other.
  • a tube with an integrated disturbing device is thus obtained which can be produced with simple tools and which does not require complicated manufacturing operations as in the case of the prior art.
  • the tube is obtained by rolling and welding on itself a metal strip of particular structure comprising a disturbing device provided on at least one of the two marginal parts of the strip which extend on either side another of a central part which does not form a disturbance.
  • the two marginal parts of the strip each form a disturbing device.
  • the central part of the strip has a smooth wall and extends over a width greater than the upper perimeter of the rolled tube, while each of the lateral parts of the strip extends over a smaller width at the outer half-perimeter of the rolled tube.
  • the strip has, flat, a width substantially equal to twice the external perimeter of the tube in the rolled state.
  • the marginal parts of the strip are delimited externally by two end edges which extend parallel to each other and which constitute the edges of the strip flat, the two end edges being close to each other. 'from each other in the tube in the rolled state.
  • each of the two folding edges of the strip is formed by winding the strip on itself. This makes it possible to obtain more resistant folding edges and offering better welding possibilities.
  • the disturbing device formed in one or each of the marginal parts of the strip is obtained by deformation of the wall thereof.
  • Each of the marginal parts may include, for example, perforations, punctures or even spikes.
  • the strip intended to form the tube of the invention is plated with solder. Under these conditions, the two marginal parts are joined by brazing with the central part, thus forming an extremely rigid double-walled tube, capable of withstanding the pressure of the fluid passing through this tube.
  • FIG. 1 shows a strip 10, in its initial flat configuration, intended for the manufacture of a rolled tube for heat exchanger according to the invention.
  • the strip 10 extends over a width L delimited by two end edges 12 which extend parallel to each other.
  • the strip 10 is further delimited by two opposite faces 14 and 16 which extend over the entire width of the strip and which define the thickness of the latter.
  • the strip 10 is made of a metallic material of the type used for the manufacture of heat exchanger tubes, for example aluminum or an aluminum alloy.
  • the strip is advantageously coated with a solder plating (not shown in FIG. 1) on its two opposite faces 14 and 16.
  • the strip 10 has two marginal parts 18 each forming a disturbing device and extending on either side of a central part 20.
  • the width L of the strip 10 corresponds substantially to twice the external perimeter P of rolled tube to be manufactured.
  • Each of the marginal parts 18 extends over a width II less than the external half-perimeter P / 2 of the rolled tube to be manufactured.
  • the central portion 20 extends over a width 1 2 greater than the outer perimeter P of the tube. It thus follows that the width 1 2 of the central part is greater than the sum of the respective widths of the two marginal parts 18, that is to say greater than twice 1 1 .
  • the central part 20 of the strip has a smooth wall, that is to say that the faces 14 and 16 are smooth in the central region of the strip.
  • the wall of the strip is deformed in each of its marginal parts 18, in order to produce a disturbing device.
  • the disturbing device of each of the marginal parts 18 is formed of a multiplicity of holes 22 which pass through the thickness of the strip right through between its opposite faces 14 and 16.
  • the holes 22 are evenly spaced and are provided over the entire Width 1 1 of each of the marginal portions 18 and over the entire length (not shown) of the strip.
  • the holes 18 may have a circular configuration or any other configuration of suitable shape.
  • each of the marginal portions 18 is folded along a folding edge 26, towards the central part 20 and attached to the latter.
  • each of the marginal parts 18 is attached to one half of the central part 20, the end edges 12 of the strip coming close to one another.
  • the folded edges 26 are rolled edges, and not straight folded edges, to allow reinforcement and a better possibility of welding as will be seen below.
  • the rolled edges 26 thus each define an internal space 28 which extends above all the length of the folded strip.
  • the internal space 28 can be reduced during the folding operation.
  • edges 12 can come into abutment against one another, or even overlap.
  • the strip is rolled so as to bring the rolled edges 26 together until they come into contact with one another.
  • This rolling operation makes it possible to form a rolled tube of determined section, for example of general oval shape. The rolling is carried out so that the marginal parts 18 are inside the tube.
  • the rolled edges 26 When the rolled edges 26 are in contact with one another, they are joined together by a welding operation. In the case where the strip is coated with a solder plating, the rolled tube is placed in a suitable oven to cause the solder plating to melt. This not only gives the welding of the edges 26 to each other but also the welding of the marginal parts 18 attached to the central part 10.
  • each of the marginal parts 18 comprises punctures 30 obtained by stamping the wall of the strip, which makes it possible to form reliefs projecting relative to the face 14.
  • the strip is wound in the same way as in the case of FIG. 2 to form a rolled tube 32 also having an oval section.
  • each of the parts 18 comprises a multiplicity of pins 34 protruding from the face 14.
  • the pins 34 are obtained by deformation of the strip wall using a multiplicity of punches, in the form of knobs, applied against the face 16 of the strip.
  • a rolled tube 36 is formed of flattened cross section having substantially a rectangular shape.
  • the marginal parts 18 are inside the tube and each form a disturbing device thanks to the reliefs provided by the wall.
  • the invention is not limited to the embodiments described above by way of example and extends to other variants.
  • other types of disturbing devices as a function of the deformations imposed on the marginal parts of the strip, in particular deformations consisting of ridges deploying in a manner substantially parallel to the axis or according to one or more coaxial turns to said axis. .
  • the invention finds a particular application in the manufacture of heat exchangers for a motor vehicle.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The invention relates to a heat exchanger tube comprising a metal strip rolled and welded onto itself, which includes a part extending inside the tube to form a perturbation device capable of generating turbulence on a fluid flowing in the tube. According to the invention, the strip includes two margin parts (18) extending on either side of a central part (20), at least one of the margin parts (18) forming a perturbation device, and each of the margin parts (18) being folded along a folding edge (26), towards the central part (20), the two folding edges (26) being brought together by rolling up the central part and the margin parts of the strip which are welded onto each other. Application in particular to heat exchangers for motor vehicles. <IMAGE>

Description

L'invention se rapporte aux échangeurs de chaleur du type tubulaire, c'est-à-dire comportant un faisceau formé d'une multiplicité de tubes destinés à être parcourus par un fluide. Les échangeurs de chaleur de ce type sont utilisés notamment dans les véhicules automobiles pour assurer soit le refroidissement du moteur, soit le chauffage de l'habitacle, soit encore le conditionnement de l'air de l'habitacle.The invention relates to heat exchangers of the tubular type, that is to say comprising a bundle formed of a multiplicity of tubes intended to be traversed by a fluid. Heat exchangers of this type are used in particular in motor vehicles to provide either cooling of the engine, or heating of the passenger compartment, or even conditioning of the air in the passenger compartment.

De façon plus spécifique, l'invention concerne un tube d'échangeur de chaleur comportant un dispositif perturbateur intégré propre à générer des turbulences lorsqu'un fluide parcourt ce tube.More specifically, the invention relates to a heat exchanger tube comprising an integrated disturbing device capable of generating turbulence when a fluid flows through this tube.

Pour accroître les performances des échangeurs de chaleur, en particulier ceux destinés à l'équipement des véhicules automobiles, il est connu de perturber l'écoulement du fluide circulant dans les tubes.To increase the performance of heat exchangers, in particular those intended for the equipment of motor vehicles, it is known to disturb the flow of the fluid circulating in the tubes.

Une solution connue pour cela consiste à introduire dans le tube, après sa fabrication, une pièce supplémentaire appelée "perturbateur" ou "turbula- teur" et éventuellement de fixer ensuite cette pièce à l'intérieur du tube, par exempte par brasage. Cette solution n'est pas satisfaisante car elle nécessite une opération particulière pour le montage d'un dispositif perturbateur à l'intérieur de chaque tube.A known solution for this consists in introducing into the tube, after its manufacture, an additional part called a "disruptor" or "turbulator" and possibly then fixing this part inside the tube, for example by brazing. This solution is not satisfactory because it requires a particular operation for mounting a disturbing device inside each tube.

On connaît aussi, d'après EP-A-0 302 232, un tube d'échangeur de chaleur comprenant un feuillard métallique roulé et soudé sur lui-même qui comporte une partie s'étendant à l'intérieur du tube pour former un dispositif perturbateur propre à générer des turbulences sur un fluide circulant dans le tube.Also known from EP-A-0 302 232 is a heat exchanger tube comprising a metal strip rolled and welded on itself which has a part extending inside the tube to form a device disruptor capable of generating turbulence on a fluid circulating in the tube.

Dans cette solution connue, le dispositif perturbateur est formé par une partie du feuillard lui-même, ce qui évite de faire appel à une pièce supplémentaire comme dans le cas de la solution citée précédemment.In this known solution, the disturbing device is formed by a part of the strip itself, which avoids the need for an additional part as in the case of the solution mentioned above.

Toutefois, la solution prévue dans le document EP-A-0 302 232 n'est pas satisfaisante car elle nécessite un outillage particulièrement complexe pour la conformation du tube à la forme désirée et plusieurs opérations de fabrication.However, the solution provided in document EP-A-0 302 232 is not satisfactory since it requires particularly complex tools for shaping the tube to the desired shape and several manufacturing operations.

L'invention a notamment pour but de surmonter les inconvénients précités.The object of the invention is in particular to overcome the aforementioned drawbacks.

Elle propose, en conséquence, un tube d'échangeur de chaleur du type défini précédemment, dans lequel le feuillard comporte deux parties marginales s'étendant de part et d'autre d'une partie centrale, l'une au moins des parties marginales formant dispositif perturbateur et chacune des parties marginales étant repliée, le long d'un bord de pliage, vers la partie centrale, et dans lequel les deux bords de pliage sont rapprochés l'un de l'autre par enroulement de la partie centrale et des parties marginales du feuillard et soudés l'un sur l'autre.It therefore proposes a heat exchanger tube of the type defined above, in which the strip has two marginal parts extending on either side of a central part, at least one of the marginal parts forming disturbing device and each of the marginal parts being folded, along a folding edge, towards the central part, and in which the two folding edges are brought towards each other by winding the central part and the parts edges of the strip and welded to each other.

On obtient ainsi un tube à dispositif perturbateur intégré qui peut être réalisé avec un outillage simple et qui ne nécessite pas d'opérations de fabrication compliquées comme dans le cas de la technique antérieure.A tube with an integrated disturbing device is thus obtained which can be produced with simple tools and which does not require complicated manufacturing operations as in the case of the prior art.

Conformément à l'invention, le tube est obtenu en roulant et soudant sur lui-même un feuillard métallique de structure particulière comportant un dispositif perturbateur prévu sur l'une au moins des deux parties marginales du feuillard qui s'étendent de part et d'autre d'une partie centrale qui, elle, ne forme pas perturbateur.According to the invention, the tube is obtained by rolling and welding on itself a metal strip of particular structure comprising a disturbing device provided on at least one of the two marginal parts of the strip which extend on either side another of a central part which does not form a disturbance.

Avantageusement, les deux parties marginales du feuillard forment chacune dispositif perturbateur.Advantageously, the two marginal parts of the strip each form a disturbing device.

Dans une forme de réalisation préférée de l'invention, la partie centrale du feuillard est à paroi lisse et s'étend sur une largeur supérieure au périmètre supérieur du tube roulé, tandis que chacune des parties latérales du feuillard s'étend sur une largeur inférieure au demi-périmètre extérieur du tube roulé.In a preferred embodiment of the invention, the central part of the strip has a smooth wall and extends over a width greater than the upper perimeter of the rolled tube, while each of the lateral parts of the strip extends over a smaller width at the outer half-perimeter of the rolled tube.

De cette manière, on peut former des dispositifs perturbateurs sur sensiblement tout le périmètre intérieur du tube à l'état roulé.In this way, disturbing devices can be formed over substantially the entire inner perimeter of the tube in the rolled state.

Selon une autre caractéristique de l'invention, le feuillard possède, à plat, une largeur sensiblement égale au double du périmètre extérieur du tube à l'état roulé.According to another characteristic of the invention, the strip has, flat, a width substantially equal to twice the external perimeter of the tube in the rolled state.

Selon encore une autre caractéristique de l'invention, les parties marginales du feuillard sont délimitées extérieurement par deux bords d'extrémité qui s'étendent parallèlement entre eux et qui constituent les bords du feuillard à plat, les deux bords d'extrémité étant proches l'un de l'autre dans le tube à l'état roulé.According to yet another characteristic of the invention, the marginal parts of the strip are delimited externally by two end edges which extend parallel to each other and which constitute the edges of the strip flat, the two end edges being close to each other. 'from each other in the tube in the rolled state.

Grâce aux caractéristiques précitées, on obtient un renforcement du tube puisque les parties marginales viennent renforcer la partie centrale du tube à l'état roulé.Thanks to the aforementioned characteristics, a reinforcement of the tube is obtained since the marginal parts reinforce the central part of the tube in the rolled state.

Dans une forme de réalisation préférée de l'invention, chacun des deux bords de pliage du feuillard est formé par enroulement du feuillard sur lui-même. Ceci permet d'obtenir des bords de pliage plus résistants et offrant de meilleures possibilités de soudage.In a preferred embodiment of the invention, each of the two folding edges of the strip is formed by winding the strip on itself. This makes it possible to obtain more resistant folding edges and offering better welding possibilities.

Selon l'invention, le dispositif perturbateur formé dans l'une ou chacune des parties marginales du feuillard est obtenu par déformation de la paroi de celui-ci. Chacune des parties marginales peut comporter par exemple des perforations, des crevés ou bien encore des picots.According to the invention, the disturbing device formed in one or each of the marginal parts of the strip is obtained by deformation of the wall thereof. Each of the marginal parts may include, for example, perforations, punctures or even spikes.

Avantageusement, le feuillard destiné à former le tube de l'invention est plaqué de brasure. Dans ces conditions, les deux parties marginales se solidarisent par brasage avec la partie centrale en formant ainsi un tube à paroi double extrêmement rigide, pouvant résister à la pression du fluide traversant ce tube.Advantageously, the strip intended to form the tube of the invention is plated with solder. Under these conditions, the two marginal parts are joined by brazing with the central part, thus forming an extremely rigid double-walled tube, capable of withstanding the pressure of the fluid passing through this tube.

Dans la description qui suit, donnée à titre d'exemple, on se réfère au dessin annexé, sur lequel :

  • - la figure 1 est une vue en coupe transversale d'un feuillard plat suivant une première forme de réalisation de l'invention ;
  • - la figure 2 est une vue en coupe d'un tube roulé formé à partir du feuillard de la figure 1 ;
  • - la figure 3 est une vue en coupe transversale d'un feuillard plat selon une seconde forme de réalisation de l'invention ;
  • - la figure 4 est une vue d'extrémité d'un tube roulé obtenu à partir du feuillard de la figure 3 ;
  • - la figure 5 est une vue en coupe transversale d'un feuillard plat selon une troisième forme de réalisation de l'invention ; et
  • - la figure 6 est une vue d'extrémité d'un tube roulé obtenu à partir du feuillard de la figure 5.
In the description which follows, given by way of example, reference is made to the appended drawing, in which:
  • - Figure 1 is a cross-sectional view of a flat strip according to a first embodiment of the invention;
  • - Figure 2 is a sectional view of a rolled tube formed from the strip of Figure 1;
  • - Figure 3 is a cross-sectional view of a flat strip according to a second embodiment of the invention;
  • - Figure 4 is an end view of a rolled tube obtained from the strip of Figure 3;
  • - Figure 5 is a cross-sectional view of a flat strip according to a third embodiment of the invention; and
  • FIG. 6 is an end view of a rolled tube obtained from the strip of FIG. 5.

On se réfère tout d'abord à la figure 1 qui représente un feuillard 10, dans sa configuration initiale à plat, destiné à la fabrication d'un tube roulé pour échangeur de chaleur selon l'invention.First of all, reference is made to FIG. 1 which shows a strip 10, in its initial flat configuration, intended for the manufacture of a rolled tube for heat exchanger according to the invention.

Le feuillard 10 s'étend sur une largeur L délimitée par deux bords d'extrémité 12 qui s'étendent parallèlement entre eux. Le feuillard 10 est en outre délimité par deux faces opposées 14 et 16 qui s'étendent sur toute la largeur du feuillard et qui définissent l'épaisseur de ce dernier.The strip 10 extends over a width L delimited by two end edges 12 which extend parallel to each other. The strip 10 is further delimited by two opposite faces 14 and 16 which extend over the entire width of the strip and which define the thickness of the latter.

Le feuillard 10 est réalisé en un matériau métallique du type utilisé pour la fabrication des tubes d'échangeur de chaleur, par exemple en aluminium ou un alliage d'aluminium.The strip 10 is made of a metallic material of the type used for the manufacture of heat exchanger tubes, for example aluminum or an aluminum alloy.

Le feuillard est avantageusement revêtu d'un placage de brasure (non représenté sur la figure 1) sur ses deux faces opposées 14 et 16.The strip is advantageously coated with a solder plating (not shown in FIG. 1) on its two opposite faces 14 and 16.

Comme montré à la figure 1, le feuillard 10 comporte deux parties marginales 18 formant chacune un dispositif perturbateur et s'étendant de part et d'autre d'une partie centrale 20. La largeur L du feuillard 10 correspond sensiblement au double du périmètre extérieur P du tube roulé à fabriquer. Chacune des parties marginales 18 s'étend sur une largeur Il inférieure au demi-périmètre extérieur P/2 du tube roulé à fabriquer. La partie centrale 20 s'étend sur une largeur 12 supérieure au périmètre extérieur P du tube. Il en résulte ainsi que la largeur 12 de la partie centrale est supérieure à la somme des largeurs respectives des deux parties marginales 18, c'est-à-dire supérieure à deux fois 11.As shown in FIG. 1, the strip 10 has two marginal parts 18 each forming a disturbing device and extending on either side of a central part 20. The width L of the strip 10 corresponds substantially to twice the external perimeter P of rolled tube to be manufactured. Each of the marginal parts 18 extends over a width II less than the external half-perimeter P / 2 of the rolled tube to be manufactured. The central portion 20 extends over a width 1 2 greater than the outer perimeter P of the tube. It thus follows that the width 1 2 of the central part is greater than the sum of the respective widths of the two marginal parts 18, that is to say greater than twice 1 1 .

La partie centrale 20 du feuillard est à paroi lisse, c'est-à-dire que les faces 14 et 16 sont lisses dans la région centrale du feuillard.The central part 20 of the strip has a smooth wall, that is to say that the faces 14 and 16 are smooth in the central region of the strip.

Par contre, la paroi du feuillard est déformée dans chacune de ses parties marginales 18, pour réaliser un dispositif perturbateur.On the other hand, the wall of the strip is deformed in each of its marginal parts 18, in order to produce a disturbing device.

Dans la forme de réalisation des figures 1 et 2, le dispositif perturbateur de chacune des parties marginales 18 est formée d'une multiplicité de trous 22 qui traversent l'épaisseur du feuillard de part en part entre ses faces opposées 14 et 16.In the embodiment of FIGS. 1 and 2, the disturbing device of each of the marginal parts 18 is formed of a multiplicity of holes 22 which pass through the thickness of the strip right through between its opposite faces 14 and 16.

Les trous 22 sont régulièrement espacés et sont prévus sur toute la largeur 11, de chacune des parties marginales 18 et sur toute la longueur (non représentée) du feuillard. Les trous 18 peuvent présenter une configuration circulaire ou toute autre configuration de forme appropriée.The holes 22 are evenly spaced and are provided over the entire Width 1 1 of each of the marginal portions 18 and over the entire length (not shown) of the strip. The holes 18 may have a circular configuration or any other configuration of suitable shape.

On se réfère maintenant à la figure 2 qui montre un tube roulé 24 obtenu à partir du feuillard 10 de la figure 1. Pour former le tube 24, chacune des parties marginales 18 est repliée le long d'un bord de pliage 26, vers la partie centrale 20 et accolé à cette dernière. Ainsi, chacune des parties marginales 18 se trouve accolée à une moitié de la partie centrale 20, les bords d'extrémité 12 du feuillard venant à proximité l'un de l'autre. On remarquera que, dans l'exemple, les bords repliés 26 sont des bords roulés, et non des bords rabattus francs, pour permettre un renforcement et une meilleure possibilité de soudage comme on le verra plus loin. Les bords roulés 26 définissent ainsi chacun un espace interne 28 qui s'étend surtou- te la longueur du feuillard replié.Referring now to Figure 2 which shows a rolled tube 24 obtained from the strip 10 of Figure 1. To form the tube 24, each of the marginal portions 18 is folded along a folding edge 26, towards the central part 20 and attached to the latter. Thus, each of the marginal parts 18 is attached to one half of the central part 20, the end edges 12 of the strip coming close to one another. It will be noted that, in the example, the folded edges 26 are rolled edges, and not straight folded edges, to allow reinforcement and a better possibility of welding as will be seen below. The rolled edges 26 thus each define an internal space 28 which extends above all the length of the folded strip.

Bien entendu, l'espace interne 28 peut être réduit lors de l'opération de pliage.Of course, the internal space 28 can be reduced during the folding operation.

De même, les bords 12 peuvent venir en butée l'un contre l'autre, voire même se recouvrir.Similarly, the edges 12 can come into abutment against one another, or even overlap.

Après cette première opération, on obtient un feuillard renforcé à paroi double dont la largeur correspond sensiblement à la demi-largeur initiale, c'est-à-dire L/2.After this first operation, a reinforced strip with double wall is obtained, the width of which corresponds substantially to the initial half-width, that is to say L / 2.

Dans une opération subséquente, on roule le feuillard de manière à rapprocher les bords roulés 26 jusqu'à ce qu'ils viennent en contact l'un de l'autre. Cette opération de roulage permet de former un tube roulé de section déterminée, par exemple de forme générale ovale. Le roulage est effectué de manière que les parties marginales 18 se trouvent à l'intérieur du tube.In a subsequent operation, the strip is rolled so as to bring the rolled edges 26 together until they come into contact with one another. This rolling operation makes it possible to form a rolled tube of determined section, for example of general oval shape. The rolling is carried out so that the marginal parts 18 are inside the tube.

Lorsque les bords roulés 26 sont au contact l'un de l'autre, on les réunit ensemble par une opération de soudage. Dans le cas où le feuillard est revêtu d'un placage de brasure, on place le tube roulé dans un four approprié pour provoquer la fusion du placage de brasure. On obtient ainsi non seulement le soudage des bords 26 entre eux mais aussi le soudage des parties marginales 18 accolées à la partie centrale 10.When the rolled edges 26 are in contact with one another, they are joined together by a welding operation. In the case where the strip is coated with a solder plating, the rolled tube is placed in a suitable oven to cause the solder plating to melt. This not only gives the welding of the edges 26 to each other but also the welding of the marginal parts 18 attached to the central part 10.

On se réfère maintenant aux figures 3 et 4 qui représentent une autre variante de réalisation de l'invention. Cette variante diffère de la précédente uniquement par la structure du dispositif perturbateur. Comme le montre la figure 3, chacune des parties marginales 18 comporte des crevés 30 obtenus par emboutissage de la paroi du feuillard, ce qui permet de former des reliefs en saillie par rapport à la face 14.Referring now to Figures 3 and 4 which show another alternative embodiment of the invention. This variant differs from the previous one only in the structure of the disturbing device. As shown in FIG. 3, each of the marginal parts 18 comprises punctures 30 obtained by stamping the wall of the strip, which makes it possible to form reliefs projecting relative to the face 14.

Dans l'exemple, le feuillard est enroulé de la même façon que dans le cas de la figure 2 pour former un tube roulé 32 présentant également une section ovale.In the example, the strip is wound in the same way as in the case of FIG. 2 to form a rolled tube 32 also having an oval section.

On se réfère maintenant aux figures 5 et 6 qui concernent une autre variante de réalisation de l'invention. Le feuillard de la figure 5 diffère des feuillards des figures 1 et 3 uniquement par la structure du dispositif perturbateur. Dans cette forme de réalisation, chacune des parties 18 comporte une multiplicité de picots 34 formés en saillie par rapport à la face 14. Les picots 34 sont obtenus par déformation de la paroi du feuillard à l'aide d'une multiplicité de poinçons, sous forme de molettes, appliqués contre la face 16 du feuillard.Reference is now made to FIGS. 5 and 6 which relate to another variant embodiment of the invention. The strip of Figure 5 differs from the strips of Figures 1 and 3 only in the structure of the disturbing device. In this form of reality sation, each of the parts 18 comprises a multiplicity of pins 34 protruding from the face 14. The pins 34 are obtained by deformation of the strip wall using a multiplicity of punches, in the form of knobs, applied against the face 16 of the strip.

Dans l'exemple représenté sur la figure 6, on forme un tube roulé 36 de section transversale aplatie ayant sensiblement une forme rectangulaire.In the example shown in Figure 6, a rolled tube 36 is formed of flattened cross section having substantially a rectangular shape.

Dans un tube roulé fabriqué conformément à l'invention, les parties marginales 18 se trouvent à l'intérieur du tube et forment chacune un dispositif perturbateur grâce aux reliefs ménagés par la paroi. Il en résulte que lorsque ce tube est monté dans un échangeur de chaleur et traversé par un fluide, généralement un liquide, le dispositif perturbateur génère des turbulences sur le fluide.In a rolled tube manufactured in accordance with the invention, the marginal parts 18 are inside the tube and each form a disturbing device thanks to the reliefs provided by the wall. As a result, when this tube is mounted in a heat exchanger and traversed by a fluid, generally a liquid, the disturbing device generates turbulence on the fluid.

L'invention n'est pas limitée aux formes de réalisation décrites précédemment à titre d'exemple et s'étend à d'autres variantes. Ainsi, il peut être envisagé d'autres types de dispositifs perturbateurs en fonction des déformations imposées aux parties marginales du feuillard, notamment des déformations consistant en des stries se déployant de manière sensiblement parallèle à l'axe ou selon une ou plusieurs spires coaxiales audit axe.The invention is not limited to the embodiments described above by way of example and extends to other variants. Thus, it is possible to envisage other types of disturbing devices as a function of the deformations imposed on the marginal parts of the strip, in particular deformations consisting of ridges deploying in a manner substantially parallel to the axis or according to one or more coaxial turns to said axis. .

L'invention trouve une application particulière à la fabrication des échangeurs de chaleur pour véhicule automobile.The invention finds a particular application in the manufacture of heat exchangers for a motor vehicle.

Claims (11)

1. - Tube d'échangeur de chaleur, comprenant un feuillard métallique roulé et soudé sur lui-même qui comporte une partie s'étendant à l'intérieur du tube pour former un dispositif perturbateur propre à générer des turbulences sur un fluide s'écoulant dans le tube, caractérisé en ce que le feuillard (10) comporte deux parties marginales (18), s'étendant de part et d'autre d'une partie centrale (20), l'une au moins des parties marginales (18) formant dispositif perturbateur, en ce que chacune des parties marginales (18) est repliée, le long d'un bord de pliage (26), vers la partie centrale (20) et en ce que les deux bords de pliage (26) sont rapprochés l'un de l'autre par enroulement de la partie centrale (20) et des parties marginales du feuillard (10) et ensuite soudés l'un sur l'autre.1. - Heat exchanger tube, comprising a metallic strip rolled and welded on itself which has a part extending inside the tube to form a disturbing device capable of generating turbulence on a flowing fluid in the tube, characterized in that the strip (10) has two marginal parts (18), extending on either side of a central part (20), at least one of the marginal parts (18) forming a disturbing device, in that each of the marginal parts (18) is folded along a folding edge (26) towards the central part (20) and in that the two folding edges (26) are brought together from each other by winding the central part (20) and the marginal parts of the strip (10) and then welded to each other. 2.- Tube d'échangeur de chaleur selon la revendication 1, caractérisé en ce que les deux parties marginales (18) forment chacune dispositif perturbateur.2. A heat exchanger tube according to claim 1, characterized in that the two marginal parts (18) each form a disturbing device. 3. - Tube d'échangeur de chaleur selon l'une des revendications 1 et 2, caractérisé en ce que la partie centrale (20) du feuillard est à paroi lisse et s'étend sur une largeur (12) supérieure au périmètre extérieur (P) du tube roulé, tandis que chacune des parties marginales (18) du feuillard (10) s'étend sur une largeur (11) inférieure au demi-périmètre extérieur du tube roulé.3. - Heat exchanger tube according to one of claims 1 and 2, characterized in that the central part (20) of the strip has a smooth wall and extends over a width (1 2 ) greater than the outer perimeter (P) of the rolled tube, while each of the marginal parts (18) of the strip (10) extends over a width (1 1 ) less than the outer half-perimeter of the rolled tube. 4. - Tube d'échangeur de chaleur selon l'une des revendications 1 à 3, caractérisé en ce que le feuillard (10) possède, à plat, une largeur (L) sensiblement égale au double du périmètre extérieur (P) du tube roulé.4. - Heat exchanger tube according to one of claims 1 to 3, characterized in that the strip (10) has, flat, a width (L) substantially equal to twice the outer perimeter (P) of the tube rolled. 5. - Tube d'échangeur de chaleur selon la revendication 4, caractérisé en ce que les parties marginales (18) sont délimitées extérieurement par deux bords d'extrémité (12) qui s'étendent parallèlement entre eux et qui constituent les bords du feuillard à plat et en ce que les deux bords d'extrémité (12) sont proches l'un de l'autre dans le tube à l'état roulé.5. - Heat exchanger tube according to claim 4, characterized in that the marginal parts (18) are delimited externally by two end edges (12) which extend parallel to each other and which constitute the edges of the strip flat and in that the two end edges (12) are close to each other in the tube in the rolled state. 6. - Tube d'échangeur de chaleur selon l'une des revendications 1 à 5, caractérisé en ce que chacun des bords de pliage (26) est formé par enroulement du feuillard sur lui-même.6. - Heat exchanger tube according to one of claims 1 to 5, characterized in that each of the folding edges (26) is formed by winding the strip on itself. 7. - Tube d'échangeur de chaleur selon l'une des revendications 1 à 6, caractérisé en ce que l'une au moins des parties marginales (18) comporte des déformations (22 ;30; 34) constituant le dispositif perturbateur.7. - Heat exchanger tube according to one of claims 1 to 6, characterized in that at least one of the marginal parts (18) comprises deformations (22; 30; 34) constituting the disturbing device. 8. - Tube d'échangeur de chaleur selon l'une des revendications 1 à 7, caractérisé en ce que l'une au moins des parties marginales (18) comporte des perforations (22) constituant le dispositif perturbateur.8. - Heat exchanger tube according to one of claims 1 to 7, characterized in that at least one of the marginal parts (18) has perforations (22) constituting the disturbing device. 9. - Tube d'échangeur de chaleur selon l'une des revendications 1 à 7, caractérisé en ce que l'une au moins des parties marginales (18) comporte des crevés (30) constituant le dispositif perturbateur.9. - Heat exchanger tube according to one of claims 1 to 7, characterized in that at least one of the marginal parts (18) has punctures (30) constituting the disturbing device. 10. - Tube d'échangeur de chaleur selon l'une des revendications 1 à 7, caractérisé en ce que l'une au moins des parties marginales (18) comporte des picots (34) constituant le dispositif perturbateur.10. - Heat exchanger tube according to one of claims 1 to 7, characterized in that at least one of the marginal parts (18) has pins (34) constituting the disturbing device. 11. - Tube d'échangeurde chaleurselon l'une des revendications 1 à 10, caractérisé en ce que le feuillard (10) est plaqué de brasure.11. - heat exchanger tube according to one of claims 1 to 10, characterized in that the strip (10) is plated with solder.
EP93401034A 1992-04-21 1993-04-21 Heat exchanger tube with integrated perturbation device Withdrawn EP0567399A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9204856 1992-04-21
FR9204856A FR2690233B1 (en) 1992-04-21 1992-04-21 HEAT EXCHANGER TUBE WITH INTEGRATED DISTURBANCE DEVICE.

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GB2324145A (en) * 1997-04-07 1998-10-14 Rollsec Ltd Heat exchanger element
EP1561825A1 (en) * 2004-02-03 2005-08-10 Paul Wurth S.A. Method for manufacturing a turbulator
WO2005075689A1 (en) * 2004-02-03 2005-08-18 Paul Wurth S.A. Method for fastening a turbulator insert within a conduit
DE102007039292A1 (en) * 2007-08-20 2009-02-26 Behr Gmbh & Co. Kg Multi-chamber flat tube, heat exchanger and use of a heat exchanger
DE102008007612A1 (en) * 2008-02-04 2009-08-06 Behr Gmbh & Co. Kg Multi-chamber flat pipe for use in heat exchanger utilized as e.g. exhaust gas cooler in internal-combustion engine of motor vehicle, has metal strip whose edge section and/or inner section lies against contact area of one of broad walls
DE102008007600A1 (en) * 2008-02-04 2009-08-06 Behr Gmbh & Co. Kg Multiple chamber-flat tube for heat exchangers such as heaters, evaporators and condensers, has two chambers for receiving flow of fluids, and chambers are manufactured by shaping metal band
DE102008007610A1 (en) * 2008-02-04 2009-08-06 Behr Gmbh & Co. Kg Multi-chamber flat tube for use in e.g. high temperature heat exchanger, to exchange heat between exhaust gas and coolant in motor vehicle, has bar with edge portions partially formed as part of side sections of metal strip
DE102008007601A1 (en) * 2008-02-04 2009-08-06 Behr Gmbh & Co. Kg Multi-chamber flat pipe has two chambers for flow admission of fluid, where chambers are manufactured, particularly in bend or folding method, by forming broad strip
DE102008007611A1 (en) * 2008-02-04 2009-08-06 Behr Gmbh & Co. Kg Multi-chamber flat pipe for use in e.g. exhaust gas cooler, in internal-combustion engine of motor vehicle, has bar formed with edge sections of side section of metal strip and part of edge sections forming arrangement for bar flap
DE102008007587A1 (en) * 2008-02-04 2009-08-06 Behr Gmbh & Co. Kg Multi-chamber automotive heat exchanger or radiator has flat tube inner chamber sub-divided by U-shaped cross-piece
US20100025027A1 (en) * 2008-07-29 2010-02-04 Daniel Borst Heat exchanger with collecting tube, collecting tube, and method for producing the same
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US7921559B2 (en) 2006-01-19 2011-04-12 Modine Manufacturing Company Flat tube, flat tube heat exchanger, and method of manufacturing same
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Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2324145A (en) * 1997-04-07 1998-10-14 Rollsec Ltd Heat exchanger element
EP1561825A1 (en) * 2004-02-03 2005-08-10 Paul Wurth S.A. Method for manufacturing a turbulator
WO2005075689A1 (en) * 2004-02-03 2005-08-18 Paul Wurth S.A. Method for fastening a turbulator insert within a conduit
DE102007039292A1 (en) * 2007-08-20 2009-02-26 Behr Gmbh & Co. Kg Multi-chamber flat tube, heat exchanger and use of a heat exchanger
DE102008007611A1 (en) * 2008-02-04 2009-08-06 Behr Gmbh & Co. Kg Multi-chamber flat pipe for use in e.g. exhaust gas cooler, in internal-combustion engine of motor vehicle, has bar formed with edge sections of side section of metal strip and part of edge sections forming arrangement for bar flap
DE102008007600A1 (en) * 2008-02-04 2009-08-06 Behr Gmbh & Co. Kg Multiple chamber-flat tube for heat exchangers such as heaters, evaporators and condensers, has two chambers for receiving flow of fluids, and chambers are manufactured by shaping metal band
DE102008007610A1 (en) * 2008-02-04 2009-08-06 Behr Gmbh & Co. Kg Multi-chamber flat tube for use in e.g. high temperature heat exchanger, to exchange heat between exhaust gas and coolant in motor vehicle, has bar with edge portions partially formed as part of side sections of metal strip
DE102008007601A1 (en) * 2008-02-04 2009-08-06 Behr Gmbh & Co. Kg Multi-chamber flat pipe has two chambers for flow admission of fluid, where chambers are manufactured, particularly in bend or folding method, by forming broad strip
DE102008007612A1 (en) * 2008-02-04 2009-08-06 Behr Gmbh & Co. Kg Multi-chamber flat pipe for use in heat exchanger utilized as e.g. exhaust gas cooler in internal-combustion engine of motor vehicle, has metal strip whose edge section and/or inner section lies against contact area of one of broad walls
DE102008007587A1 (en) * 2008-02-04 2009-08-06 Behr Gmbh & Co. Kg Multi-chamber automotive heat exchanger or radiator has flat tube inner chamber sub-divided by U-shaped cross-piece
US8474517B2 (en) * 2008-07-29 2013-07-02 Modine Manufacturing Company Heat exchanger with collecting tube, collecting tube, and method for producing the same
US20100025027A1 (en) * 2008-07-29 2010-02-04 Daniel Borst Heat exchanger with collecting tube, collecting tube, and method for producing the same
WO2015033895A1 (en) * 2013-09-03 2015-03-12 三桜工業株式会社 Heat transfer pipe, method for manufacturing heat transfer pipe, and heat exchanger
JP2015049013A (en) * 2013-09-03 2015-03-16 三桜工業株式会社 Heat transfer pipe, manufacturing method of heat transfer pipe, and heat exchanger
GB2563569A (en) * 2017-05-11 2018-12-26 Univ Coventry A method of manufacturing a hollow shelled component and a component
CN110998211A (en) * 2017-08-07 2020-04-10 摩丁制造公司 Heat exchanger tube
EP3521746A1 (en) * 2018-02-06 2019-08-07 Valeo Autosystemy SP. Z.O.O. A flat tube for a heat exchanger
CN110118504A (en) * 2018-02-06 2019-08-13 法雷奥自动系统公司 Flat tube
CN110118504B (en) * 2018-02-06 2023-04-28 法雷奥自动系统公司 Flat tube

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FR2690233B1 (en) 1994-06-03
FR2690233A1 (en) 1993-10-22

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