EP0495973B1 - Method and device for splitting a stream of fluid - Google Patents

Method and device for splitting a stream of fluid Download PDF

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Publication number
EP0495973B1
EP0495973B1 EP91915776A EP91915776A EP0495973B1 EP 0495973 B1 EP0495973 B1 EP 0495973B1 EP 91915776 A EP91915776 A EP 91915776A EP 91915776 A EP91915776 A EP 91915776A EP 0495973 B1 EP0495973 B1 EP 0495973B1
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EP
European Patent Office
Prior art keywords
sheet
corrugated
corrugated element
turns
channels
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EP91915776A
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German (de)
French (fr)
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EP0495973A1 (en
Inventor
Jean Picot
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Spirec A Responsabilite Ltee Ste
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Spirec A Responsabilite Ltee Ste
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/04Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being formed by spirally-wound plates or laminae
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00Making other particular articles
    • B21D53/02Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/027Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers by helically or spirally winding elongated elements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/025Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements

Definitions

  • the present invention relates to a device according to the preamble of claim 10, intended to ensure the partition of a pipe defining a flow vein for a fluid, into a plurality of elementary veins of identical shape and size and making it possible to promote chemical or physical exchanges between fluids or their various solid or gaseous liquid phases and a process for manufacturing said device according to the preamble of claim 1.
  • such channels have been produced by winding a strip, generally metallic, on itself, so as to constitute a multiplicity of turns , a corrugated sheet being interposed between these turns, so that the corrugations of said corrugated sheet are parallel to the longitudinal axis of the device, and that the tops of the undulations are successively in contact with one face and the other of the strip.
  • a plurality of parallel channels is thus obtained, the shape and dimensions of the section of which depend on those of the corrugations of the corrugated sheet, this section usually being of substantially trapezoidal shape, three of the sides of said trapezium being formed by the sides of a undulation of the corrugated sheet and the fourth side by successively one side and the other of the strip.
  • the corrugated sheet must have a flexible structure so as to be able to adapt to the variation in radius of curvature to which it is subjected as and when the winding is carried out.
  • this same corrugated sheet must be applied to the strip and we are therefore led, during the winding operation, to exert, both on the strip and on the corrugated sheet, a certain tension force tending to tighten the turns. of the two windings.
  • these tubes have a circular cross section which implies that such a device for partitioning a fluid stream has a significant loss of cross section, corresponding to the surface existing between the tubes.
  • the object of the present invention is therefore a method making it possible to obtain, from the previously mentioned winding technique, a bundle of parallel channels of identical sections allowing ensure the partitioning of large-diameter fluid veins, which is both easy to manufacture and which presents only a minimum loss of passage cross-section.
  • the present invention aims to overcome this drawback by providing a means for producing partitioning devices for fluid veins of practically any length.
  • the present invention provides a means for avoiding the superposition of defects and therefore their amplification, thus contributing to a better homogeneity of the flow channels formed.
  • the objects mentioned above are achieved by a method of manufacturing a device intended to ensure the partitioning of a flowing flow vein into a plurality of identical elementary veins, consisting of a plurality of adjacent parallel channels the channels being obtained by simultaneous winding, on the same core, of '' at least two sheets, namely a first flat sheet, or strip, and a second corrugated sheet, the corrugated sheet taking place between two successive turns of the strip so that the tops of two of its successive corrugations come into contact with each respectively of these turns.
  • This method is characterized in that one ensures a stiffening of the corrugated sheet, as and when it is placed between the turns of the strip, by fixing it on said strip, so as to maintain substantially constant the radial spacing separating two successive turns of the strip. Said objects are also achieved by a device with the characteristics set out in claim 10.
  • the present invention therefore employs two stiffening means, namely a first known means, constituted by the strip and a second means constituted by the corrugated sheet which, as soon as it is fixed to the first means, then behaves as a system of members.
  • the present invention also makes it possible to improve the stiffening provided by the first means since it is possible, without causing the corrugated sheet to be crushed, to increase the traction exerted on the strip during winding, which makes it possible to improve the rigidity imparted to the device by the first means of stiffening.
  • the corrugated sheet consists of a series of corrugated elements placed end to end, the junction between two successive elements, namely a first element or upstream element (that is to say a element already in place between two turns of the strip) and a second element or downstream element (that is to say an element to be put in place), by fixing these two elements to the strip, and the front part of the downstream element abutting with the rear part of the upstream element so as to ensure the continuity of the undulation between the upstream element and the downstream element.
  • a first element or upstream element that is to say a element already in place between two turns of the strip
  • a second element or downstream element that is to say an element to be put in place
  • the front part of a corrugated element ends in a corrugation vertex intended to come into abutment against a flank of a corrugation situated furthest back from a disposed element upstream, superimposed on the rear part of it.
  • the length of the rear part of an element situated beyond said flank forming a stop is not critical, and this avoids setting work of an additional length dimension.
  • each corrugated element can end in a flat part, extending the flank of the corrugation the most. backward.
  • the corrugated sheet consists of a series separate elements placed end to end, each element being reversed laterally with respect to the previous one, so that a given side of an element is opposite this side on the next element.
  • the inherent rigidity of the corrugated element is improved, which is particularly advantageous in the case of corrugated elements of large width and small thickness, by making end of the latter intended to come into contact with the side of the corrugation of another element, a stiffening rib constituted by a fold substantially parallel to the side of the corrugation with which it is intended to come into contact.
  • each channel nevertheless communicates with them, so as to ensure a balancing of the flow parameters of the different channels.
  • a core 1 consisting of a cylindrical tube is secured, at each of its ends of a hub 3 rotatably mounted on a bearing 5 held by a support 7 (shown partially).
  • the core 1 is able to rotate around the horizontal axis xx 'joining the two bearings 5.
  • Radial spokes 9, serving as winding guides, start from the center of the hub 3 and extend towards the outside of it to come to rest on a wheel (not shown in the drawing).
  • the fixing can be carried out by spot welding which has the advantage of being unable to create additional volume inside the channels 15, a volume which would be a source of flow disturbances.
  • the stiffening of the corrugated sheet 12 can, for certain corrugations, be obtained by securing a corrugation top 13 in contact with one face of the strip 11, the latter, and a wavy top 13 substantially symmetrical to the previous one with respect to the strip 11.
  • the corrugated sheet 12, as shown in FIG. 4, can also consist of a series of corrugated elements 12 ′ which are placed end to end. Each of these corrugated elements 12 ′ is fixed by its corrugation vertices 13 to the strip 11.
  • the corrugated elements 12 ′ can terminate, at each of their ends by a semi-corrugation vertex (Fig. 5) open towards said regions ends, so that bringing the rear face of an element into abutment with the front face of another element ensures continuity of the undulation between the two corrugated elements 12 ′.
  • the respective end portions 22 and 23 of the corrugated elements are fixed by welding points 14a and 14b respectively on the strip 11.
  • the positioning of the wavy elements 12 ′ when they are asymmetrical in shape as shown in FIGS. 4 and 7, can also be carried out by placing the part 23 of greater length (which then becomes the front part of a corrugated downstream element) under the part 22 of shorter length (which then becomes the rear part of a corrugated element upstream).
  • the front part 22 of the corrugated element 12 ' is folded, substantially in the same direction as that of the rear flank 19 of the corrugated element upstream with which it is intended to come into contact, so as to form a rib 20.
  • This rib 20 plays a rigidification role which is particularly advantageous in the case where corrugated elements 12 ′ of thin thickness and of large width.
  • corrugated sheet 12 By producing the corrugated sheet 12 in a modular manner, it is possible, by reversing laterally the successive corrugated elements 12 ′, to avoid the accumulation of errors and tolerances manifested on each of the corrugations, and which, by the play of the superpositions of the different turns, are likely to cause a taper of the device which can lead to its disposal.
  • Such communication can thus be obtained by using a strip 11 consisting of a porous element at least in the areas for which a given degree of interchannel communication is desired.
  • the porosity rate of the strip 11 will allow the desired degree of communication to be adjusted.
  • Such communication between adjacent channels can also be used to ensure mixing of fluids, and for example favor the so-called “online mixing” operations.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Laminated Bodies (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

A method is provided for producing a plurality of parallel adjacent channels (15) for splitting a stream of fluid into a plurality of identical component streams. The channels (15) are obtained by simultaneously winding around a single core (1) at least two sheets, namely a first, plane sheet or strip (11) and a second, corrugated sheet (12), said corrugated sheet being inserted between two consecutive turns of the strip (11) so that the highest points (14) of two of its corrugations respectively engage each of said turns. According to the method, the corrugated sheet (12) is stiffened as it is inserted between the turns of the strip (11) by fixing it onto said strip (11) in such a way that the radial spacing between two consecutive turns thereof remains substantially constant.

Description

La présente invention concerne un dispositif selon le préambule de la revendication 10, destiné à assurer la partition d'une canalisation définissant une veine d'écoulement d'un fluide, en une pluralité de veines élémentaires de formes et de dimensions identiques et permettant de favoriser des échanges chimiques ou physiques entre des fluides ou leurs diverses phases liquides solides ou gazeuses et un procédé de fabrication dudit dispositif selon le préambule de la revendication 1.The present invention relates to a device according to the preamble of claim 10, intended to ensure the partition of a pipe defining a flow vein for a fluid, into a plurality of elementary veins of identical shape and size and making it possible to promote chemical or physical exchanges between fluids or their various solid or gaseous liquid phases and a process for manufacturing said device according to the preamble of claim 1.

On retrouve dans la technique antérieure, et notamment dans le domaine du conditionnement d'air, des dispositifs qui, pour faciliter les échanges thermiques entre une veine d'air en écoulement et une source de calories (ou de frigories), assurent une telle partition d'une veine fluide au moyen d'une pluralité de canaux adjacents à celui de la veine d'air en écoulement.Found in the prior art, and in particular in the field of air conditioning, devices which, to facilitate heat exchange between a stream of flowing air and a source of calories (or frigories), ensure such a partition of a fluid stream by means of a plurality of channels adjacent to that of the flowing air stream.

D'une façon connue, notamment par le brevet français FR-A-2 625 298 au nom de la Demanderesse, on a réalisé de tels canaux en enroulant sur lui-même un feuillard, généralement métallique, de façon à constituer une multiplicité de spires, une feuille ondulée étant interposée entre ces spires, de façon que les ondulations de ladite feuille ondulée soient parallèles à l'axe longitudinal du dispositif, et que les sommets des ondulations soient successivement en contact avec une face et l'autre du feuillard. On obtient ainsi une pluralité de canaux parallèles dont la forme et les dimensions de la section sont fonction de celles des ondulations de la feuille ondulée, cette section étant habituellement de forme sensiblement trapézoïdale, trois des côtés dudit trapèze étant constitués par les flancs d'une ondulation de la feuille ondulée et le quatrième côté par successivement une face et l'autre du feuillard.In a known manner, in particular by French patent FR-A-2 625 298 in the name of the Applicant, such channels have been produced by winding a strip, generally metallic, on itself, so as to constitute a multiplicity of turns , a corrugated sheet being interposed between these turns, so that the corrugations of said corrugated sheet are parallel to the longitudinal axis of the device, and that the tops of the undulations are successively in contact with one face and the other of the strip. A plurality of parallel channels is thus obtained, the shape and dimensions of the section of which depend on those of the corrugations of the corrugated sheet, this section usually being of substantially trapezoidal shape, three of the sides of said trapezium being formed by the sides of a undulation of the corrugated sheet and the fourth side by successively one side and the other of the strip.

On sait que la fabrication de tels dispositifs de partition d'une veine d'écoulement fluide est particulièrement délicate dès lors que l'on souhaite réaliser des canaux de faible section et de formes et de dimensions identiques.It is known that the manufacture of such devices for partitioning a fluid flow stream is particularly delicate when it is desired to produce channels of small cross section and of identical shapes and dimensions.

En effet, on sait que la feuille ondulée doit posséder une structure souple de façon à être en mesure de s'adapter à la variation de rayon de courbure à laquelle elle est soumise au fur et à mesure de la réalisation de l'enroulement. Or cette même feuille ondulée doit être appliquée sur le feuillard et on est donc conduit, au cours de l'opération d'enroulement, à exercer, tant sur le feuillard que sur la feuille ondulée, une certaine force de tension tendant à resserrer les spires des deux enroulements. En raison de la souplesse des feuilles ondulées, mentionnée précédemment, ces dernières ont ainsi tendance à se déformer, de façon plus ou moins régulière, au cours de ladite opération, d'autant qu'au cours de celle-ci la distance séparant une spire en cours de l'axe de symétrie du dispositif augmentant progressivement, la force de tension exercée sur le feuillard voit son couple augmenter, ce qui a ainsi tendance à accroître la déformation des canaux précédemment formés. L'expérience a ainsi montré que l'on ne pouvait obtenir, par cette technique, une pluralité de canaux adjacents identiques recouvrant une veine d'écoulement de grand diamètre, par exemple de l'ordre du mètre.Indeed, it is known that the corrugated sheet must have a flexible structure so as to be able to adapt to the variation in radius of curvature to which it is subjected as and when the winding is carried out. However, this same corrugated sheet must be applied to the strip and we are therefore led, during the winding operation, to exert, both on the strip and on the corrugated sheet, a certain tension force tending to tighten the turns. of the two windings. Due to the flexibility of the corrugated sheets mentioned above, the latter thus tend to become deform, more or less regularly, during said operation, all the more so that during this operation the distance separating a turn in progress from the axis of symmetry of the device gradually increasing, the tension force exerted on the strip sees its torque increase, which thus tends to increase the deformation of the previously formed channels. Experience has thus shown that it was not possible to obtain, by this technique, a plurality of identical adjacent channels covering a flow vein of large diameter, for example of the order of a meter.

On a donc recours pour cela à d'autres techniques, telles que celle consistant à assembler purement et simplement des tubes rigides cylindriques de sections identiques que l'on solidarise parallèlement entre eux par leurs génératrices. Cependant une telle forme de mise en oeuvre est particulièrement difficile, longue et coûteuse.We therefore have recourse to this for other techniques, such as that consisting of purely and simply assembling rigid cylindrical tubes of identical sections which are secured parallel to each other by their generatrices. However, such a form of implementation is particularly difficult, long and costly.

D'autre part, la plupart du temps, ces tubes ont une section circulaire ce qui implique qu'un tel dispositif de partitionnement d'une veine fluide présente une perte de section de passage importante, correspondant à la surface existant entre les tubes.On the other hand, most of the time, these tubes have a circular cross section which implies that such a device for partitioning a fluid stream has a significant loss of cross section, corresponding to the surface existing between the tubes.

La présente invention a ainsi pour but un procédé permettant d'obtenir, à partir de la technique d'enroulement précédemment mentionnée, un faisceau de canaux parallèles de sections identiques permettant d'assurer la partition de veines fluides de grand diamètre, qui soit à la fois d'une fabrication aisée et qui ne présente qu'une perte minimale de section de passage.The object of the present invention is therefore a method making it possible to obtain, from the previously mentioned winding technique, a bundle of parallel channels of identical sections allowing ensure the partitioning of large-diameter fluid veins, which is both easy to manufacture and which presents only a minimum loss of passage cross-section.

D'autre part on a constaté que les feuilles planes disponibles sur le marché, et servant à la fabrication de la feuille ondulée sont, pour des raisons de fabrication, de faible largeur, ce qui conduit à limiter la longueur de chacun des canaux constituant une veine fluide élémentaire. La présente invention a également pour but de pallier à cet inconvénient en proposant un moyen permettant de réaliser des dispositifs partitionneurs de veines fluides de longueur pratiquement quelconque.On the other hand it was found that the flat sheets available on the market, and used for the manufacture of the corrugated sheet are, for manufacturing reasons, of small width, which leads to limit the length of each of the channels constituting a elementary fluid vein. The present invention also aims to overcome this drawback by providing a means for producing partitioning devices for fluid veins of practically any length.

Enfin, par le principe même utilisé dans ce type de dispositif, un défaut répétitif ou une variation de cote, même minime, faite sur une ondulation se trouve multiplié, par le jeu des superpositions successives des spires, et conduit à des déformations substantielles pouvant créer, par exemple, une conicité du dispositif, le rendant impropre à sa destination.Finally, by the very principle used in this type of device, a repetitive defect or a variation in dimension, even a small one, made on a corrugation is multiplied, by the play of successive superpositions of the turns, and leads to substantial deformations which can create , for example, a taper of the device, making it unsuitable for its destination.

La présente invention propose un moyen permettant d'éviter la superposition des défauts et donc leur amplification, contribuant ainsi à une meilleure homogénéité des canaux d'écoulement formés. Les objets mentionnés ci-dessus sont atteints par un procédé de fabrication d'un dispositif destiné à assurer la partition d'une veine fluide en écoulement en une pluralité de veines élémentaires identiques, constitué d'une pluralité de canaux adjacents parallèles les canaux étant obtenus par enroulement simultané, sur un même noyau, d'au moins deux feuilles, à savoir une première feuille plane, ou feuillard, et une seconde feuille ondulée, la feuille ondulée prenant place entre deux spires successives du feuillard de façon que les sommets de deux de ses ondulations successives viennent respectivement en contact avec chacune de ces spires. Ce procédé est caractérisé en ce que l'on assure une rigidification de la feuille ondulée, au fur et à mesure de sa mise en place entre les spires du feuillard, par fixation de celle-ci sur ledit feuillard, de façon à maintenir sensiblement constant l'écartement radial séparant deux spires successives du feuillard. Lesdits objets sont atteints aussi par un dispositif avec les caractéristiques énoncées dans la revendication 10.The present invention provides a means for avoiding the superposition of defects and therefore their amplification, thus contributing to a better homogeneity of the flow channels formed. The objects mentioned above are achieved by a method of manufacturing a device intended to ensure the partitioning of a flowing flow vein into a plurality of identical elementary veins, consisting of a plurality of adjacent parallel channels the channels being obtained by simultaneous winding, on the same core, of '' at least two sheets, namely a first flat sheet, or strip, and a second corrugated sheet, the corrugated sheet taking place between two successive turns of the strip so that the tops of two of its successive corrugations come into contact with each respectively of these turns. This method is characterized in that one ensures a stiffening of the corrugated sheet, as and when it is placed between the turns of the strip, by fixing it on said strip, so as to maintain substantially constant the radial spacing separating two successive turns of the strip. Said objects are also achieved by a device with the characteristics set out in claim 10.

La présente invention met donc en oeuvre deux moyens de rigidification, à savoir un premier moyen, connu, constitué par le feuillard et un second moyen constitué par la feuille ondulée qui, dès lors qu'elle est fixée au premier moyen, se comporte alors comme un système de membrures.The present invention therefore employs two stiffening means, namely a first known means, constituted by the strip and a second means constituted by the corrugated sheet which, as soon as it is fixed to the first means, then behaves as a system of members.

En plus de la rigidité propre conférée par la solidarisation de l'élément ondulé avec le feuillard, la présente invention permet également d'améliorer la rigidification procurée par le premier moyen puisqu'il est possible, sans provoquer l'écrasement de la feuille ondulée, d'augmenter la traction exercée sur le feuillard au cours de l'enroulement, ce qui permet d'améliorer la rigidité conférée au dispositif par le premier moyen de rigidification.In addition to the inherent rigidity conferred by the joining of the corrugated element with the strip, the present invention also makes it possible to improve the stiffening provided by the first means since it is possible, without causing the corrugated sheet to be crushed, to increase the traction exerted on the strip during winding, which makes it possible to improve the rigidity imparted to the device by the first means of stiffening.

Dans une variante intéressante de l'invention la feuille ondulée est constituée d'une série d'éléments ondulés mis bout à bout, la jonction entre deux éléments successifs, à savoir un premier élément ou élément amont (c'est-à-dire un élément déjà mis en place entre deux spires du feuillard) et un second élément ou élément aval (c'est-à-dire un élément à mettre en place), se faisant par fixation de ces deux éléments sur le feuillard, et la partie avant de l'élément aval venant en butée avec la partie arrière de l'élément amont de façon à assurer la continuité de l'ondulation entre l'élément amont et l'élément aval.In an advantageous variant of the invention, the corrugated sheet consists of a series of corrugated elements placed end to end, the junction between two successive elements, namely a first element or upstream element (that is to say a element already in place between two turns of the strip) and a second element or downstream element (that is to say an element to be put in place), by fixing these two elements to the strip, and the front part of the downstream element abutting with the rear part of the upstream element so as to ensure the continuity of the undulation between the upstream element and the downstream element.

Dans une autre variante de mise en oeuvre de l'invention la partie avant d'un élément ondulé se termine par un sommet d'ondulation destiné à venir en butée contre un flanc d'une ondulation située la plus en arrière d'un élément disposé en amont, en se superposant à la partie arrière de celui-ci. Dans ces conditions la longueur de la partie arrière d'un élément se situant au-delà dudit flanc formant butée n'est pas critique, et on évite ainsi la mise en oeuvre d'une cote de longueur supplémentaire. De plus, afin de simplifier la fabrication des éléments ondulés, ainsi que pour favoriser leur mise en place sur un élément situé en amont par rapport à eux, chaque élément ondulé peut se terminer par une partie plane, prolongeant le flanc d'ondulation le plus en arrière.In another variant of implementation of the invention, the front part of a corrugated element ends in a corrugation vertex intended to come into abutment against a flank of a corrugation situated furthest back from a disposed element upstream, superimposed on the rear part of it. Under these conditions, the length of the rear part of an element situated beyond said flank forming a stop is not critical, and this avoids setting work of an additional length dimension. In addition, in order to simplify the manufacture of the corrugated elements, as well as to favor their positioning on an element situated upstream with respect to them, each corrugated element can end in a flat part, extending the flank of the corrugation the most. backward.

Dans une autre variante de mise en oeuvre de l'invention, et afin d'éviter les superpositions multiples de défauts minimes susceptibles de conduire, comme mentionné précédemment, à des défauts importants devenant très vite rédhibitoires, la feuille ondulée est constituée d'une série d'éléments séparés mis bout à bout, chaque élément étant inversé latéralement par rapport au précédent, de façon qu'un côté donné d'un élément se trouve opposé à ce côté sur l'élément suivant.In another variant of implementation of the invention, and in order to avoid multiple superimpositions of minimal defects likely to lead, as mentioned above, to major defects becoming quickly unacceptable, the corrugated sheet consists of a series separate elements placed end to end, each element being reversed laterally with respect to the previous one, so that a given side of an element is opposite this side on the next element.

Enfin, dans une autre variante de mise en oeuvre de l'invention on améliore la rigidité propre de l'élément ondulé, ce qui est particulièrement intéressant dans le cas d'éléments ondulés de grande largeur et de faible épaisseur, en réalisant à l'extrémité de celui-ci destinée à venir en contact avec le flanc de l'ondulation d'un autre élément, une nervure de rigidification constituée par une pliure sensiblement parallèle au flanc de l'ondulation avec lequel elle est destinée à entrer en contact.Finally, in another variant of implementation of the invention, the inherent rigidity of the corrugated element is improved, which is particularly advantageous in the case of corrugated elements of large width and small thickness, by making end of the latter intended to come into contact with the side of the corrugation of another element, a stiffening rib constituted by a fold substantially parallel to the side of the corrugation with which it is intended to come into contact.

Pour certaines applications du dispositif suivant l'invention on fera en sorte que, sans être en communication totale avec ceux qui lui sont adjacents, chaque canal communique néanmoins avec ceux-ci, de façon à assurer un équilibrage des paramètres d'écoulement des différents canaux.For some device applications according to the invention, it will be ensured that, without being in total communication with those which are adjacent to it, each channel nevertheless communicates with them, so as to ensure a balancing of the flow parameters of the different channels.

Pour se faire on pourra avantageusement mettre en oeuvre un feuillard constitué d'un matériau poreux, dont les dimensions des pores permettront d'ajuster, en fonction des spécificités de l'utilisation, le taux d'échange intercanaux que l'on souhaite réaliser.To do this, it is advantageously possible to use a strip made of a porous material, the pore dimensions of which will make it possible to adjust, according to the specifics of the use, the interchannel exchange rate that one wishes to achieve.

On décrira ci-après, à titre d'exemples non limitatifs, diverses formes d'exécution de la présente invention, en référence au dessin annexé sur lequel :

  • La figure 1 est une vue partielle en perspective d'un dispositif permettant de mettre en oeuvre le procédé suivant l'invention, représenté en cours de réalisation de l'enroulement.
  • La figure 2 est une section droite partielle en coupe, d'un dispositif suivant l'invention, représenté en début de réalisation d'enroulement.
  • La figure 3 est une section droite partielle en coupe d'un dispositif suivant l'invention représenté en cours de réalisation de l'enroulement.
  • La figure 4 est une vue partielle en coupe de plusieurs éléments ondulés, présentés avant leur mise en place et sensiblement dans la position qu'ils occuperont dans le dispositif.
  • Les figures 5 et 6 sont des vues partielles en coupe transversale de variantes de mise en oeuvre de l'invention.
  • La figure 7 est une vue partielle en perspective d'un élément ondulé.
  • La figure 8 est une vue partielle en coupe transversale de la variante de mise en oeuvre de la figure 7.
  • La figure 9 est une vue en perspective d'un mode de réalisation de l'invention.
Various embodiments of the present invention will be described below, by way of nonlimiting examples, with reference to the appended drawing in which:
  • Figure 1 is a partial perspective view of a device for implementing the method according to the invention, shown during production of the winding.
  • Figure 2 is a partial cross section in section, of a device according to the invention, shown at the start of winding embodiment.
  • Figure 3 is a partial cross section in section of a device according to the invention shown during production of the winding.
  • Figure 4 is a partial sectional view of several corrugated elements, presented before their installation and substantially in the position they will occupy in the device.
  • Figures 5 and 6 are partial cross-sectional views of alternative embodiments of the invention.
  • Figure 7 is a partial perspective view of a corrugated element.
  • FIG. 8 is a partial view in cross section of the alternative embodiment of FIG. 7.
  • Figure 9 is a perspective view of an embodiment of the invention.

Sur la figure 1 un noyau 1, constitué d'un tube cylindrique est solidarisé, à chacune de ses extrémités d'un moyeu 3 monté à rotation sur un palier 5 maintenu par un support 7 (représenté partiellement). De cette façon le noyau 1 est en mesure de tourner autour de l'axe horizontal xx' joignant les deux paliers 5. Des rayons radiaux 9, servant de guides d'enroulement, partent du centre du moyeu 3 et s'étendent vers l'extérieur de celui-ci pour venir prendre appui sur une roue (non représentée sur le dessin).In Figure 1 a core 1, consisting of a cylindrical tube is secured, at each of its ends of a hub 3 rotatably mounted on a bearing 5 held by a support 7 (shown partially). In this way the core 1 is able to rotate around the horizontal axis xx 'joining the two bearings 5. Radial spokes 9, serving as winding guides, start from the center of the hub 3 and extend towards the outside of it to come to rest on a wheel (not shown in the drawing).

On a fixé, de façon connue, les bords extrêmes d'une feuille métallique plane, ou feuillard 11, et d'une feuille métallique ondulée 12 sur ledit noyau 1 et l'on a fait effectuer au dispositif une rotation autour de l'axe xx' dans le sens C, inverse de celui des aiguilles d'une montre. On vient ensuite, au fur et à mesure du positionnement de la feuille ondulée 12 deux spires successives du feuillard 11, solidariser, par exemple par soudure par point 14, réalisée à chacune des extrémités du noyau 1, respectivement en S et S', la feuille ondulée 12 sur le feuillard 11. On obtient ainsi une série de canaux 15.Was fixed in known manner, the extreme edges of a flat metal sheet, or strip 11, and a corrugated metal sheet 12 on said core 1 and the device was made to rotate around the axis xx 'in direction C, opposite to that of clockwise. We then come, as the positioning of the corrugated sheet 12 two successive turns of the strip 11, secured, for example by spot welding 14, produced at each of the ends of the core 1, respectively at S and S ', the corrugated sheet 12 on the strip 11. This gives a series of channels 15 .

On procède ainsi à la solidarisation progressive de l'élément ondulé 12 avec le feuillard 11 de, soit la totalité des sommets 13 des ondulations, soit seulement une partie de celles-ci. Le nombre de points de fixation, dépendra d'une part de la rigidité que l'on souhaite obtenir, rigidité qui est également fonction de la section droite des canaux 15, de l'épaisseur de la feuille ondulée 12, de sa nature, de son mode de fixation etc...One thus proceeds to the progressive joining of the corrugated element 12 with the strip 11 of either the totality of the vertices 13 of the corrugations, or only a part of these. The number of fixing points will depend on the one hand on the rigidity which it is desired to obtain, rigidity which is also a function of the cross section of the channels 15, of the thickness of the corrugated sheet 12, of its nature, of its method of attachment etc ...

On pourra ainsi ne procéder à la fixation, sur le feuillard 11, que d'un seul sommet d'ondulation 13 sur deux, ou ne fixer que les sommets 13 en contact avec le recto ou le verso du feuillard 11.It will thus be possible to attach, to the strip 11, only one corrugation vertex 13 out of two, or to fix only the vertices 13 in contact with the front or back of the strip 11.

On pourra également procéder à l'opération de fixation de la feuille ondulée 12 sur le feuillard 11, après qu'une spire complète ait été réalisée, afin de permettre une libération des contraintes pouvant exister entre les différents canaux d'une même spire et une répartition de celles-ci sur la spire entière. On améliore ainsi d'une part la qualité de la fixation puisque celle-ci est réalisée en dehors de toute contrainte et d'autre part la régularité des canaux formés.We can also proceed to the fixing operation of the corrugated sheet 12 on the strip 11, after a complete turn has been carried out, in order to allow a release of the stresses which may exist between the different channels of the same turn and a distribution of these over the entire turn. This improves on the one hand the quality of the fixing since it is carried out without any constraint and on the other hand the regularity of the channels trained.

Comme représenté sur la figure 2 la fixation peut être réalisée par soudure par point qui présente l'avantage de ne peut pas créer de volume supplémentaire à l'intérieur des canaux 15, volume qui serait source de perturbations de l'écoulement.As shown in FIG. 2, the fixing can be carried out by spot welding which has the advantage of being unable to create additional volume inside the channels 15, a volume which would be a source of flow disturbances.

Comme montré sur la figure 3 la rigidification de la feuille ondulée 12 peut, pour certaines ondulations, être obtenue en réalisant une solidarisation, d'un sommet d'ondulation 13 en contact avec une face du feuillard 11, de ce dernier, et d'un sommet d'ondulation 13 sensiblement symétrique du précédent par rapport au feuillard 11.As shown in FIG. 3, the stiffening of the corrugated sheet 12 can, for certain corrugations, be obtained by securing a corrugation top 13 in contact with one face of the strip 11, the latter, and a wavy top 13 substantially symmetrical to the previous one with respect to the strip 11.

La feuille ondulée 12, comme représentée sur la figure 4, peut également être constituée d'une série d'éléments ondulés 12' que l'on dispose bout à bout. Chacun de ces éléments ondulés 12' est fixé par ses sommets d'ondulation 13 au feuillard 11. Les éléments ondulés 12' peuvent se terminer, à chacune de leurs extrémités par un demi-sommet d'ondulation (Fig.5) ouvert vers lesdites extrémités, de façon qu'en amenant en butée la face arrière d'un élément avec la face avant d'un autre élément on assure une continuité de l'ondulation entre les deux éléments ondulés 12'. De préférence, et comme représenté sur la figure 5, les parties extrêmes respectives 22 et 23 des éléments ondulés sont fixées par des points de soudure respectifs 14a et 14b sur le feuillard 11. Un tel repérage d'un élément ondulé 12' par rapport à un élément situé en amont par rapport à lui, s'il assure un positionnement relatif correct des deux éléments implique cependant de mettre à une cote précise à la fois la partie 22 et la partie 23 de chaque élément ondulé 12'.The corrugated sheet 12, as shown in FIG. 4, can also consist of a series of corrugated elements 12 ′ which are placed end to end. Each of these corrugated elements 12 ′ is fixed by its corrugation vertices 13 to the strip 11. The corrugated elements 12 ′ can terminate, at each of their ends by a semi-corrugation vertex (Fig. 5) open towards said regions ends, so that bringing the rear face of an element into abutment with the front face of another element ensures continuity of the undulation between the two corrugated elements 12 ′. Preferably, and as shown in FIG. 5, the respective end portions 22 and 23 of the corrugated elements are fixed by welding points 14a and 14b respectively on the strip 11. Such identification of a corrugated element 12 ′ with respect to an element situated upstream with respect to it, if it ensures correct relative positioning of the two elements, however, implies putting a dimension specifies both part 22 and part 23 of each corrugated element 12 '.

Sur les figures 4 et 6 on assure un tel positionnement relatif de façon différente, en donnant par exemple à la partie avant 22 d'un élément ondulé disposé en aval d'un autre élément une longueur sensiblement égale à celle d'un sommet d'ondulation 13, et en disposant cette partie avant 22 de l'élément aval sur la partie arrière 23 de l'élément amont, de façon qu'elle vienne en contact avec le flanc 19 de l'ondulation la plus en arrière de celui-ci.In FIGS. 4 and 6, such relative positioning is ensured in a different manner, by giving for example to the front part 22 of a corrugated element disposed downstream of another element, a length substantially equal to that of a vertex of corrugation 13, and by placing this front part 22 of the downstream element on the rear part 23 of the upstream element, so that it comes into contact with the flank 19 of the most rear corrugation of the latter .

Dans ces conditions il est possible de réaliser la partie arrière 23 de l'élément amont de forme plate, cette dernière partie pouvant être de longueur quelconque, puisqu'elle ne participe en rien au positionnement relatif d'un élément ondulé aval par rapport à un élément ondulé amont. On simplifie ainsi notablement la mise en oeuvre industrielle de l'élément ondulé.Under these conditions it is possible to produce the rear part 23 of the upstream element of flat shape, this last part possibly being of any length, since it does not participate in any way in the relative positioning of a corrugated downstream element with respect to a upstream corrugated element. This significantly simplifies the industrial implementation of the corrugated element.

Bien entendu la mise en place des éléments ondulés 12', lorsqu'ils sont de forme dissymétrique comme représenté sur les figures 4 et 7, peut s'effectuer également en disposant la partie 23 de plus grande longueur (qui devient alors la partie avant d'un élément ondulé aval) sous la partie 22 de plus petite longueur (qui devient alors la partie arrière d'un élément ondulé amont).Of course, the positioning of the wavy elements 12 ′, when they are asymmetrical in shape as shown in FIGS. 4 and 7, can also be carried out by placing the part 23 of greater length (which then becomes the front part of a corrugated downstream element) under the part 22 of shorter length (which then becomes the rear part of a corrugated element upstream).

Dans une variante de mise en oeuvre de l'invention représentée sur les figures 7 et 8 la partie avant 22 de l'élément ondulé 12' est pliée, sensiblement suivant la même direction que celle du flanc arrière 19 de l'élément ondulé amont avec lequel elle est destinée à entrer en contact, de façon à former une nervure 20. Cette nervure 20 joue un rôle de rigidification ce qui est particulièrement intéressant dans le cas où l'on met en oeuvre des éléments ondulés 12' de faible épaisseur et de grande largeur.In an alternative embodiment of the invention shown in FIGS. 7 and 8, the front part 22 of the corrugated element 12 'is folded, substantially in the same direction as that of the rear flank 19 of the corrugated element upstream with which it is intended to come into contact, so as to form a rib 20. This rib 20 plays a rigidification role which is particularly advantageous in the case where corrugated elements 12 ′ of thin thickness and of large width.

Bien entendu la solidarisation des éléments ondulés 12' avec le feuillard 11 pourrait être obtenue par d'autres moyens, à savoir rivetage, collage etc...Of course, the joining of the corrugated elements 12 ′ with the strip 11 could be obtained by other means, namely riveting, bonding, etc.

En réalisant la feuille ondulée 12 de façon modulaire, on peut, en inversant latéralement les éléments ondulés 12' successifs, éviter les accumulations des erreurs et des tolérances se manifestant sur chacune des ondulations, et qui, par le jeu des superpositions des différentes spires, sont susceptibles d'entraîner une conicité du dispositif pouvant conduire à la mise au rebut de celui-ci.By producing the corrugated sheet 12 in a modular manner, it is possible, by reversing laterally the successive corrugated elements 12 ′, to avoid the accumulation of errors and tolerances manifested on each of the corrugations, and which, by the play of the superpositions of the different turns, are likely to cause a taper of the device which can lead to its disposal.

Enfin, dans certains types d'applications il est important que les paramètres d'écoulement entre canaux adjacents soient très proches les uns des autres, et on créera pour ce faire une communication contrôlée entre ces canaux.Finally, in certain types of applications there It is important that the flow parameters between adjacent channels are very close to each other, and this will create a controlled communication between these channels.

Une telle communication peut ainsi être obtenue en faisant appel à un feuillard 11 constitué d'un élément poreux au moins dans les zones pour lesquelles un degré donné de communication intercanaux est souhaité. Le taux de porosité du feuillard 11 permettra d'ajuster le degré de communication souhaité.Such communication can thus be obtained by using a strip 11 consisting of a porous element at least in the areas for which a given degree of interchannel communication is desired. The porosity rate of the strip 11 will allow the desired degree of communication to be adjusted.

On peut également, comme représenté sur la figure 9, réaliser une telle communication entre canaux adjacents, en utilisant deux feuillards 11,11' écartés d'une distance e, cette distance permettant de contrôler le degré de communication intercanaux.It is also possible, as shown in FIG. 9, to carry out such communication between adjacent channels, using two strips 11, 11 ′ spaced apart by a distance e, this distance making it possible to control the degree of interchannel communication.

Une telle communication entre canaux adjacents peut également être utilisée pour assurer des mélanges de fluides, et favoriser par exemple les opérations dites de "mélange en ligne".Such communication between adjacent channels can also be used to ensure mixing of fluids, and for example favor the so-called "online mixing" operations.

Claims (14)

  1. Process for manufacturing a device intended to ensure division of a fluid stream in flow into a plurality of identical elementary streams, constituted by a plurality of parallel adjacent channels (15), channels (15) being obtained by simultaneously winding, on the same core (1), at least two sheets, namely a first plane foil, or sheet (11), and a second corrugated sheet (12), the corrugated sheet (12) taking its place between two successive turns of the sheet (11) so that the apices (14) of two of its successive corrugations come respectively into contact with each of these turns, characterized in that the corrugated sheet (12) is rigidified as it is placed in position between the turns of the sheet (11), by fixing it on said sheet (11), so as to maintain substantially constant the radial distance separating two successive turns of the sheet (11).
  2. Process according to Claim 1, characterized in that a corrugated sheet (12) is used, constituted by a series of separate elements (12') placed end to end, the join between two successive elements (12'), namely an upstream corrugated element already placed in position and a downstream corrugated element to be placed in position, being effected by fixing the two elements (12') on the sheet (11).
  3. Process according to Claim 2, characterized in that a first end (22) of a corrugated element (12') is placed in abutment with the other end (23) of one (sic.) the adjacent corrugated element, so as to ensure continuity of the corrugation between the upstream corrugated element (12') and the downstream corrugated element (12').
  4. Process according to Claim 3, characterized in that the corrugated element (12') terminates at a first end by a corrugation apex (13), the latter being placed in abutment against a corrugation side (19) of an adjacent corrugated element (12').
  5. Process according to Claim 4, characterized in that each corrugated element (12') terminates at its other end in a plane part (23) coming into contact with a turn of the sheet (11), this plane part receiving the first end (22) of an adjacent corrugated element (12').
  6. Process according to Claim 4, characterized in that the transverse edge of said first end of a corrugated element (12') is curved so as to form a rib (20) for rigidity substantially parallel to the side (19) of the corrugation of the corrugated element (12') with which it comes into abutment.
  7. Process according to Claim 2, characterized in that each corrugated element (12') is laterally inverted with respect to the preceding one so that a given side of one lies opposite this same side on an adjacent corrugated element (12').
  8. Process according to any one of the preceding Claims, characterized in that fixation of the corrugated sheet (12) on the sheet (11) is effected by spot welding.
  9. Process according to any one of the preceding Claims, characterized in that said fixation is effected over a whole turn, constituted by a corrugated sheet (12) and a sheet (11), after the latter has been covered with a new turn.
  10. Device intended to ensure division of a fluid stream in flow into a plurality of identical elementary streams, constituted by a plurality of adjacent channels (15) traversed by the fluid stream, these channels (15) being constituted by the spiral winding of at least one plane foil, or sheet (11), the radial distance separating two successive turns being substantially identical, a corrugated sheet (12) being disposed between two successive turns so that the apices (13) of two of its successive corrugations come respectively into contact with each of these turns, characterized in that the corrugated sheet (12) is rigidified by fixation on the sheet (11).
  11. Device according to Claim 10, characterized in that it comprises means for communication between adjacent channels.
  12. Device according to Claim 11, characterized in that the sheet (11) is constituted, at least on a part of its surface, by a porous material.
  13. Device according to Claim 11, characterized in that it comprises two sheets (11, 11') in contact with the same corrugated sheet (12), these two sheets (11, 11') being spaced apart from each other in order to create a passage between channels.
  14. Device according to any one of the preceding Claims, characterized in that it comprises a corrugated sheet (12) constituted by a series of separate elements (12') placed end to end, the join between two successive elements (12'), namely an upstream corrugated element already placed in position and a downstream corrugated element to be placed in position, being effected by fixation of the two elements (12') on the sheet (11).
EP91915776A 1990-08-10 1991-08-07 Method and device for splitting a stream of fluid Expired - Lifetime EP0495973B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9010266A FR2665651B1 (en) 1990-08-10 1990-08-10 METHOD AND DEVICE FOR PROVIDING THE PARTITION OF A FLUID VEIN.
FR9010266 1990-08-10
PCT/FR1991/000654 WO1992002317A1 (en) 1990-08-10 1991-08-07 Method and device for splitting a stream of fluid

Publications (2)

Publication Number Publication Date
EP0495973A1 EP0495973A1 (en) 1992-07-29
EP0495973B1 true EP0495973B1 (en) 1994-10-26

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EP91915776A Expired - Lifetime EP0495973B1 (en) 1990-08-10 1991-08-07 Method and device for splitting a stream of fluid

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EP (1) EP0495973B1 (en)
DE (1) DE69104820D1 (en)
FR (1) FR2665651B1 (en)
WO (1) WO1992002317A1 (en)

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Publication number Priority date Publication date Assignee Title
EP0753712B1 (en) * 1995-07-12 2000-10-11 ROLLS-ROYCE plc A heat exchanger
WO2012095688A1 (en) * 2011-01-12 2012-07-19 Da Vinci Association For Inventors' Rights Heat exchanger manifold and method of manufacture
DE102012203714A1 (en) * 2012-03-08 2013-09-12 Siemens Aktiengesellschaft Barrier system for a high-voltage device and high-voltage device with a barrier system
GB2552523B (en) * 2016-07-28 2020-12-30 Bkbd Ltd Condensing boiler

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Publication number Priority date Publication date Assignee Title
US2731713A (en) * 1951-11-23 1956-01-24 Gen Electric Method of making a focused multicell
US2757628A (en) * 1952-09-17 1956-08-07 Gen Motors Corp Method of making a multiple passage heat exchanger tube
US3909901A (en) * 1973-03-29 1975-10-07 Stalker Corp Method of fabricating a heat exchanger core
FR2625298B1 (en) * 1987-12-28 1991-10-18 Spirec DEVICE FOR HEATING OR COOLING A GASEOUS FLUID USED IN PARTICULAR AS A TERMINAL BATTERY OF AN AIR CONDITIONING INSTALLATION

Also Published As

Publication number Publication date
EP0495973A1 (en) 1992-07-29
FR2665651A1 (en) 1992-02-14
DE69104820D1 (en) 1994-12-01
WO1992002317A1 (en) 1992-02-20
FR2665651B1 (en) 1993-07-02

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