EP3088834B1 - Heat exchanger - Google Patents
Heat exchanger Download PDFInfo
- Publication number
- EP3088834B1 EP3088834B1 EP16162358.2A EP16162358A EP3088834B1 EP 3088834 B1 EP3088834 B1 EP 3088834B1 EP 16162358 A EP16162358 A EP 16162358A EP 3088834 B1 EP3088834 B1 EP 3088834B1
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- EP
- European Patent Office
- Prior art keywords
- flange
- diffuser
- housing
- threads
- heat exchanger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- 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
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
- F02M26/32—Liquid-cooled heat exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/04—Arrangements for sealing elements into header boxes or end plates
- F28F9/06—Arrangements for sealing elements into header boxes or end plates by dismountable joints
- F28F9/12—Arrangements for sealing elements into header boxes or end plates by dismountable joints by flange-type connections
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2255/00—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes
- F28F2255/08—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes pressed; stamped; deep-drawn
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2275/00—Fastening; Joining
- F28F2275/20—Fastening; Joining with threaded elements
Definitions
- the present invention relates to a heat exchanger, in particular an exhaust gas heat exchanger, according to the preamble of claim 1.
- EP 1 367 252 discloses such a heat exchanger.
- the invention also relates to a method for producing a diffuser for such a heat exchanger.
- a generic heat exchanger with tubes trapped at both ends in tube plates for guiding a gaseous medium and with a housing adjoining the tube plates and enclosing the tubes for guiding a liquid cooling medium is known.
- the tube sheets, the tubes and the housing are formed from heat-resistant, austenitic steel sheets, the tubes being welded into the tube sheets stamped from a sheet and the tube sheets being welded into the housing.
- the tube sheets themselves are formed as deep-drawn parts, each of which has a circumferential wall which projects outwards from the ends of the tubes of the tube sheet, which is welded to the housing and to which a diffuser is connected in each case. This is intended to enable the heat exchanger to be produced advantageously in terms of welding technology.
- the diffuser itself has a wall that extends along the ends of a stack of flat heat exchanger tubes and the inside of which is tightly connected to the ends by means of soldering.
- a tight solder connection between the wall and the ends of the heat exchanger tubes and a fixation of the stack should thereby be created in that the wall extends all around the entire circumference of the stack and has depressions or slots which correspond to furrows in the circumference of the stack.
- diffusers on known heat exchangers have hitherto been produced either in one piece from cast steel, die-cast aluminum or plastic injection molding or in several parts from one or more deep-drawn parts with an attached flange.
- a flange is joined, for example soldered, with a heat exchanger block.
- the opposite flange for upstream or downstream components, i.e. the flange of the diffuser facing away from the heat exchanger block is usually designed as a flange with a sealing surface and threads.
- this function can be integrated into the cast, whereas the flange must be specially added from one or more deep-drawn parts.
- the threads can also be integrated into the casting when manufacturing as an aluminum die-cast part, whereas when manufacturing as a plastic injection-molded part, additional threaded bushings have to be injected.
- a disadvantage of the heat exchangers known from the prior art is that their diffusers, if they are made of gray cast iron, for example, are expensive and also heavy due to the required use of materials and mechanical processing. In addition, these often no longer meet the current purity and corrosion requirements. Cast stainless steel diffusers are also expensive and heavy. Die-cast aluminum diffusers, on the other hand, can only be used to a limited extent with regard to the operating temperature and corrosion resistance. With exhaust gas heat exchangers, for example, only a screwed or clipped connection of these diffusers is possible. The same applies to diffusers designed as plastic injection molded parts.
- Diffusers in turn, which are made from several individual deep-drawn parts with an attached flange, are expensive because each deep-drawn part has a separate tool is required and the individual deep-drawn parts must subsequently be joined together with one another and with the flange.
- the tolerance requirements for the individual deep-drawn parts are also very high.
- the present invention is therefore concerned with the problem of specifying an improved or at least an alternative embodiment for a heat exchanger of the generic type, which in particular enables less expensive production.
- the present invention is based on the general idea of no longer producing a diffuser for a heat exchanger, for example an exhaust gas heat exchanger, as previously as a cast part or as a plastic injection molded part or from a plurality of deep-drawn parts joined together, but rather together with its two flanges, that is to say a first housing of the Heat exchanger facing flange and a second flange facing away from it, as a one-piece deep-drawn part.
- the heat exchanger according to the invention which can be designed, for example, as an exhaust gas heat exchanger, has tubes held or trapped in a tube sheet at both ends for guiding a gaseous medium, for example exhaust gas, and a housing which adjoins the tube sheets and surrounds the tubes for guiding a coolant.
- a diffuser is connected, which has a first flange facing the housing and a second flange facing away from it. According to the invention, these two flanges now form an integral part of the one-piece diffuser according to the invention designed as a deep-drawn part.
- the diffuser according to the invention not only one can be compared to gray cast iron diffusers significantly cheaper and lighter diffuser are created, but the production as a one-piece deep-drawn part is also significantly easier, since no more deep-drawn parts are manufactured with correspondingly high tolerance requirements and these have to be joined later in a subsequent processing step with each other and with at least the second flange.
- the diffuser according to the invention can thus be produced inexpensively, easily and simply, which also has a positive effect not only on the weight of the heat exchanger, but also on its production costs.
- an inner contour of the first flange of the diffuser is complementary to an outer contour of the housing, so that the diffuser with its first flange can be pushed over the housing.
- a gas-tight connection between the first flange of the diffuser and the housing usually takes place by soldering, for example in a soldering furnace.
- At least two threads are arranged in the region of the second flange, by means of which a screwing to a preceding or following component is possible.
- Both the putting through and the subsequent rolling for producing the at least two threads as well as the putting through of the at least two screw-in openings and the subsequent arrangement of the at least two associated nuts represents a comparatively simple, inexpensive way of realizing such a thread. Since the thread itself now Gas area, either coated screws must be used for sealing or the thread area itself must be sealed in some other way.
- the at least two nuts are usually fixed to the second flange by means of a soldered or welded connection. Particularly in the case of soldering, there is the possibility of combining this with the production of further soldered connections, for example connecting the diffuser to the housing, in a soldering oven and thereby producing it economically.
- the second flange has a sealing plane with a circumferential edge, the screw-in openings being arranged in the region of the edge.
- the screw-in openings can either be punched out in the event that the associated threads are realized using two nuts arranged behind them, or can be put through if the associated threads are produced by subsequent rolling. Due to the integral design of the second flange and its sealing plane with the diffuser, both the second flange and the peripheral edge forming the sealing plane can be produced comparatively easily and inexpensively.
- the present invention is further based on the general idea of specifying a simplified and cost-reduced method for producing a diffuser for a heat exchanger described in the previous paragraphs, in which the diffuser is first produced as a one-piece deep-drawn part with a first and a second flange.
- the second flange is designed as a continuous plane.
- a through opening is then punched into this plane of the second flange, a circumferential edge formed as a sealing plane remaining around this through opening.
- the passage opening later serves to allow the in the pipes flowing gaseous medium, for example exhaust gas.
- at least two screw-in openings are made in the edge, either by pushing through or by punching.
- a subsequent thread can then be produced in one piece with the second flange by reshaping, for example by rolling.
- a nut on an inside of the second flange in alignment with the respective screw-in openings, for example by soldering or welding.
- a heat exchanger 1 according to the invention which can be designed, for example, as an exhaust gas heat exchanger, has a heat exchanger block 2 with tubes 5 held at both ends in a tube sheet 3, 4 for guiding a gaseous medium, for example exhaust gas.
- a gaseous medium for example exhaust gas.
- two of the tubes 5, which can be designed, for example, as flat tubes.
- a housing 6 for guiding a cooling medium is provided next to the tube sheets 3, 4 and enclosing the tubes 5. The cooling medium is introduced into the housing 6 via an inlet 7 and discharged from the latter via an outlet 8.
- the diffuser 9 will now be dealt with, wherein of course the diffuser 9 'could be designed in the same or a similar manner.
- the diffuser 9 with the two flanges 10, 11 is formed as a one-piece deep-drawn part, as is also the case in FIGS 3 to 15 is shown.
- An inner contour of the first flange 10 is complementary to an outer contour of the housing 6, so that the diffuser 9 with its first flange 10 can be pushed over the housing 6 and can be tightly connected there, in particular soldered.
- the threads 12 are each formed by a nut 13, which are arranged on an inside of the second flange 11 in alignment with an associated screw-in opening 14.
- the nuts 13 are welded or soldered to the second flange 11.
- the nuts 13 themselves can be designed, for example, as square nuts 15, as is the case, for example, in accordance with FIGS Fig.
- the threads 12 can also be produced in one piece with the second flange 11 by reshaping, in particular by passing the screw-in openings 14 into the second flange 11, and then rolling, as is the case, for example, with the diffusers 9 according to FIGS 6 to 8 and 14 and 15 is shown. Both ways of making the Threads 13 offer a simple and inexpensive way of manufacturing.
- the second flange 11 has a sealing plane 17 with a circumferential edge 18, the circumferential edge 18 running around a passage opening 19 through which exhaust gas flows during operation.
- the through opening 19 can either be punched out, as is the case, for example, in accordance with FIGS 9 to 15 is shown, or additionally have a stiffening collar 20, as is the case, for example, with the through openings 19 according to FIGS 3 to 5 the case is.
- the diffuser 9 according to the invention can be produced comparatively simply by first producing it as a one-piece deep-drawn part with a first and a second flange 10, 11, ie deep-drawing, the second flange 11 being designed as a plane.
- a through opening 19 is now punched into this plane of the second flange 11, with a circumferential edge 18 designed as a sealing plane 17 remaining around the through opening 19.
- the circumferential collar 20 can optionally also be formed thereon.
- At least two, in the present case three, screw-in openings 14 are now introduced into the edge 18, with a thread 13 now alternatively being produced in one piece with the second flange 11 by reshaping, in particular by rolling, in the region of the screw-in openings 14, as is shown, for example, in accordance with FIG the 6 to 8 and 14 and 15 is shown, or else a nut 13 is arranged in alignment with the screw-in openings 14 on an inside of the second flange 11, in particular soldered or welded, as is shown in FIGS 9 to 13 is shown.
- the latter can be designed in a comparatively simple and cost-effective manner and also easily, in particular in comparison to diffusers known from the prior art, which are designed, for example, as a cast part or have to be assembled from several individual deep-drawn parts .
Description
Die vorliegende Erfindung betrifft einen Wärmeübertrager, insbesondere einen Abgaswärmeübertrager, gemäß dem Oberbegriff des Anspruchs 1.
Aus der
Aus der
die Rohre und das Gehäuse sind dabei aus hitzebeständigen, austenitischen Stahlblechen geformt, wobei die Rohre in die aus einem Blech gestanzten Rohrböden und die Rohrböden in das Gehäuse eingeschweißt sind. Die Rohrböden selbst sind dabei als tiefgezogene Teile ausgebildet, die jeweils eine umlaufende, die Enden der Rohre des Rohrbodens nach außen überragende Wand aufweisen, die mit dem Gehäuse verschweißt ist und an die sich jeweils ein Diffusor anschließt. Hierdurch soll es ermöglicht werden, den Wärmeübertrager schweißtechnisch vorteilhaft herstellen zu können.From the
the tubes and the housing are formed from heat-resistant, austenitic steel sheets, the tubes being welded into the tube sheets stamped from a sheet and the tube sheets being welded into the housing. The tube sheets themselves are formed as deep-drawn parts, each of which has a circumferential wall which projects outwards from the ends of the tubes of the tube sheet, which is welded to the housing and to which a diffuser is connected in each case. This is intended to enable the heat exchanger to be produced advantageously in terms of welding technology.
Aus der
Generell sind Diffusoren an bekannten Wärmeübertragern bislang entweder einteilig aus Stahlguss, Aluminiumdruckguss oder Kunststoffspritzguss oder mehrteilig aus einem oder mehreren Tiefziehteilen mit angefügtem Flansch hergestellt. Bei einer Herstellung aus Stahlguss oder dem Design aus einem oder mehreren Tiefziehteilen wird ein Flansch mit einem Wärmeübertragerblock gefügt, beispielsweise verlötet. Der gegenüberliegende Flansch für vor- oder nachgeschaltete Bauteile, d.h. der dem Wärmeübertragerblock abgewandte Flansch des Diffusors, wird meist als Flansch mit Dichtfläche und Gewinden ausgeführt. Bei Stahlguss kann diese Funktion in den Guss integriert werden, wogegen der Flansch beim Design aus einem oder mehreren Tiefziehteilen extra angefügt werden muss. Auch bei der Herstellung als Aluminiumdruckgussteil können die Gewinde in den Guss integriert werden, wogegen bei einer Herstellung als Kunststoffspritzgussteil extra Gewindebuchsen eingespritzt werden müssen.In general, diffusers on known heat exchangers have hitherto been produced either in one piece from cast steel, die-cast aluminum or plastic injection molding or in several parts from one or more deep-drawn parts with an attached flange. In the case of production from cast steel or the design from one or more deep-drawn parts, a flange is joined, for example soldered, with a heat exchanger block. The opposite flange for upstream or downstream components, i.e. the flange of the diffuser facing away from the heat exchanger block is usually designed as a flange with a sealing surface and threads. In the case of cast steel, this function can be integrated into the cast, whereas the flange must be specially added from one or more deep-drawn parts. The threads can also be integrated into the casting when manufacturing as an aluminum die-cast part, whereas when manufacturing as a plastic injection-molded part, additional threaded bushings have to be injected.
Nachteilig bei den aus dem Stand der Technik bekannten Wärmeübertragern ist dabei, dass deren Diffusoren, sofern sie beispielsweise aus Grauguss hergestellt sind, aufgrund des erforderlichen Materialeinsatzes und der mechanischen Bearbeitung teuer und zudem schwer sind. Darüber hinaus genügen diese oftmals nicht mehr den aktuellen Reinheits- und Korrosionsanforderungen. Diffusoren aus Edelstahlfeinguss sind ebenfalls teuer und schwer. Diffusoren aus Aluminiumdruckguss wiederum sind bezüglich der Einsatztemperatur und der Korrosionsbeständigkeit nur beschränkt einsatzfähig. Bei Abgaswärmeübertragern ist beispielsweise nur eine geschraubte oder geclipste Anbindung dieser Diffusoren möglich. Gleiches gilt für als Kunststoffspritzgussteil ausgebildete Diffusoren. Diffusoren wiederum, welche aus mehreren einzelnen Tiefziehteilen mit angefügtem Flansch hergestellt werden, sind teuer, da je Tiefziehteil ein separates Werkzeug erforderlich ist und die einzelnen Tiefziehteile zu dem nachträglich miteinander sowie mit dem Flansch gefügt werden müssen. Auch sind die Toleranzanforderungen an die einzelnen Tiefziehteile hierbei sehr hoch.A disadvantage of the heat exchangers known from the prior art is that their diffusers, if they are made of gray cast iron, for example, are expensive and also heavy due to the required use of materials and mechanical processing. In addition, these often no longer meet the current purity and corrosion requirements. Cast stainless steel diffusers are also expensive and heavy. Die-cast aluminum diffusers, on the other hand, can only be used to a limited extent with regard to the operating temperature and corrosion resistance. With exhaust gas heat exchangers, for example, only a screwed or clipped connection of these diffusers is possible. The same applies to diffusers designed as plastic injection molded parts. Diffusers, in turn, which are made from several individual deep-drawn parts with an attached flange, are expensive because each deep-drawn part has a separate tool is required and the individual deep-drawn parts must subsequently be joined together with one another and with the flange. The tolerance requirements for the individual deep-drawn parts are also very high.
Die vorliegende Erfindung beschäftigt sich daher mit dem Problem, für einen Wärmeübertrager der gattungsgemäßen Art eine verbesserte oder zumindest eine alternative Ausführungsform anzugeben, die insbesondere eine kostengünstigere Herstellung ermöglicht.The present invention is therefore concerned with the problem of specifying an improved or at least an alternative embodiment for a heat exchanger of the generic type, which in particular enables less expensive production.
Dieses Problem wird erfindungsgemäß durch die Gegenstände der unabhängigen Ansprüche gelöst. Vorteilhafte Ausführungsformen sind Gegenstand der abhängigen Ansprüche.According to the invention, this problem is solved by the subjects of the independent claims. Advantageous embodiments are the subject of the dependent claims.
Die vorliegende Erfindung beruht auf dem allgemeinen Gedanken, einen Diffusor für einen Wärmeübertrager, beispielsweise einen Abgaswärmeübertrager, nicht mehr wie bislang als Gussteil oder als Kunststoffspritzgussteil oder aus mehreren miteinander gefügten Tiefziehteilen herzustellen, sondern diesen zusammen mit seinen beiden Flanschen, d.h. einem ersten einem Gehäuse des Wärmeübertragers zugewandten Flansch und einem zweiten davon abgewandten Flansch, als einstückiges Tiefziehteil auszubilden. Der erfindungsgemäße Wärmeübertrager, welcher beispielsweise als Abgaswärmeübertrager ausgebildet sein kann, besitzt dabei an beiden Enden in einem Rohrboden gehaltene bzw. gefangene Rohre zur Führung eines gasförmigen Mediums, beispielsweise Abgas, sowie einen an die Rohrböden anschließenden und die Rohre umschließenden Gehäuse zum Führen eines Kühlmittels. Zumindest eingangsseitig oder ausgangsseitig an das Gehäuse ist ein Diffusor angeschlossen, der einen dem Gehäuse zugewandten ersten Flansch und einen davon abgewandten zweiten Flansch aufweist. Erfindungsgemäß bilden nun diese beiden Flansche einen integralen Bestandteil des einstückigen und als Tiefziehteil ausgebildeten erfindungsgemäßen Diffusors. Mit dem erfindungsgemäßen Diffusor kann nicht nur ein im Vergleich zu Graugussdiffusoren deutlich kostengünstigerer und leichterer Diffusor geschaffen werden, sondern die Herstellung als einstückiges Tiefziehteil ist zudem deutlich einfacher, da nicht mehr mehrere Tiefziehteile mit jeweils entsprechend hohen Toleranzanforderungen hergestellt und diese später in einem sich anschließenden Bearbeitungsschritt noch miteinander und mit zumindest dem zweiten Flansch gefügt werden müssen. Der erfindungsgemäße Diffusor lässt sich somit kostengünstig, leicht und einfach herstellen, was sich auch positiv nicht nur auf das Gewicht des Wärme-übertragers, sondern auch auf dessen Herstellungskosten auswirkt.The present invention is based on the general idea of no longer producing a diffuser for a heat exchanger, for example an exhaust gas heat exchanger, as previously as a cast part or as a plastic injection molded part or from a plurality of deep-drawn parts joined together, but rather together with its two flanges, that is to say a first housing of the Heat exchanger facing flange and a second flange facing away from it, as a one-piece deep-drawn part. The heat exchanger according to the invention, which can be designed, for example, as an exhaust gas heat exchanger, has tubes held or trapped in a tube sheet at both ends for guiding a gaseous medium, for example exhaust gas, and a housing which adjoins the tube sheets and surrounds the tubes for guiding a coolant. At least on the input side or output side of the housing, a diffuser is connected, which has a first flange facing the housing and a second flange facing away from it. According to the invention, these two flanges now form an integral part of the one-piece diffuser according to the invention designed as a deep-drawn part. With the diffuser according to the invention, not only one can be compared to gray cast iron diffusers significantly cheaper and lighter diffuser are created, but the production as a one-piece deep-drawn part is also significantly easier, since no more deep-drawn parts are manufactured with correspondingly high tolerance requirements and these have to be joined later in a subsequent processing step with each other and with at least the second flange. The diffuser according to the invention can thus be produced inexpensively, easily and simply, which also has a positive effect not only on the weight of the heat exchanger, but also on its production costs.
Bei einer vorteilhaften Weiterbildung der erfindungsgemäßen Lösung ist eine Innenkontur des ersten Flansches des Diffusors komplementär zu einer Außenkontur des Gehäuses ausgebildet, so dass der Diffusor mit seinem ersten Flansch über das Gehäuse geschoben werden kann. Eine gasdichte Verbindung zwischen dem ersten Flansch des Diffusors und dem Gehäuse erfolgt dabei üblicherweise über ein Verlöten, beispielsweise in einem Lötofen.In an advantageous development of the solution according to the invention, an inner contour of the first flange of the diffuser is complementary to an outer contour of the housing, so that the diffuser with its first flange can be pushed over the housing. A gas-tight connection between the first flange of the diffuser and the housing usually takes place by soldering, for example in a soldering furnace.
Erfindungsgemäß sind im Bereich des zweiten Flansches zumindest zwei Gewinde angeordnet, über welche ein Verschrauben mit einem vor- oder nachgeschalteten Bauteil möglich ist. Zur Realisierung dieser zumindest zwei Gewinde ist es alternativ möglich, diese durch Umformen, insbesondere durch Durchstellen von zwei Einschrauböffnungen in den zweiten Flansch und anschließendem Rollieren, einstückig mit dem Flansch herzustellen, oder aber die zumindest zwei Gewinde durch jeweils eine Mutter zu bilden, die an einer Innenseite des zweiten Flansches fluchtend zu einer zugehörigen Einschrauböffnung angeordnet werden. Sowohl das Durchstellen und das anschließende Rollieren zur Herstellung der zumindest zwei Gewinde als auch das Durchstellen der zumindest zwei Einschrauböffnungen und das anschließende Anordnen der zumindest zwei zugehörigen Muttern stellt dabei eine vergleichsweise einfache kostengünstige Möglichkeit zur Realisierung eines solchen Gewindes dar. Da die Gewinde selbst nun im Gasbereich liegen, müssen zur Abdichtung entweder beschichtete Schrauben verwendet werden oder aber der Gewindebereich selbst muss anderweitig abgedichtet werden. Ein Fixieren der zumindest zwei Muttern mit dem zweiten Flansch erfolgt dabei üblicherweise über eine Löt- oder Schweißverbindung. Besonders bei einem Verlöten bietet sich dabei die Möglichkeit, dies mit dem Herstellen weiterer Lötverbindungen, beispielsweise dem Verbinden des Diffusors mit dem Gehäuse, in einem Lötofen zusammenzufassen und dadurch wirtschaftlich herzustellen.According to the invention, at least two threads are arranged in the region of the second flange, by means of which a screwing to a preceding or following component is possible. To realize these at least two threads, it is alternatively possible to produce them in one piece with the flange by reshaping, in particular by making two screw-in openings in the second flange and then rolling, or alternatively to form the at least two threads by one nut each an inner side of the second flange are arranged in alignment with an associated screw-in opening. Both the putting through and the subsequent rolling for producing the at least two threads as well as the putting through of the at least two screw-in openings and the subsequent arrangement of the at least two associated nuts represents a comparatively simple, inexpensive way of realizing such a thread. Since the thread itself now Gas area, either coated screws must be used for sealing or the thread area itself must be sealed in some other way. The at least two nuts are usually fixed to the second flange by means of a soldered or welded connection. Particularly in the case of soldering, there is the possibility of combining this with the production of further soldered connections, for example connecting the diffuser to the housing, in a soldering oven and thereby producing it economically.
In einer weiteren vorteilhaften Ausführungsform der erfindungsgemäßen Lösung weist der zweite Flansch eine Dichtebene mit einem umlaufenden Rand auf, wobei die Einschrauböffnungen im Bereich des Randes angeordnet sind. Die Einschrauböffnungen können dabei entweder durchgestanzt werden, für den Fall, dass die zugehörigen Gewinde über zwei dahinter angeordnete Muttern realisiert werden, oder aber durchgestellt werden, sofern die zugehörigen Gewinde durch anschließendes Rollieren hergestellt werden. Durch die integrale Ausbildung des zweiten Flansches und seiner Dichtebene mit dem Diffusor können sowohl der zweite Flansch als auch der die Dichtebene bildende umlaufende Rand vergleichsweise einfach und kostengünstig hergestellt werden.In a further advantageous embodiment of the solution according to the invention, the second flange has a sealing plane with a circumferential edge, the screw-in openings being arranged in the region of the edge. The screw-in openings can either be punched out in the event that the associated threads are realized using two nuts arranged behind them, or can be put through if the associated threads are produced by subsequent rolling. Due to the integral design of the second flange and its sealing plane with the diffuser, both the second flange and the peripheral edge forming the sealing plane can be produced comparatively easily and inexpensively.
Die vorliegende Erfindung beruht weiter auf dem allgemeinen Gedanken, ein vereinfachtes und hinsichtlich der Kosten reduziertes Verfahren zur Herstellung eines Diffusors für einen in den vorherigen Absätzen beschriebenen Wärmeübertrager anzugeben, bei welchem zunächst der Diffusor als einstückiges Tiefziehteil mit einem ersten und einem zweiten Flansch hergestellt wird. Der zweite Flansch ist dabei als durchgehende Ebene ausgebildet. In diese Ebene des zweiten Flansches wird nun eine Durchgangsöffnung eingestanzt, wobei um diese Durchgangsöffnung herum ein als Dichtebene ausgebildeter umlaufender Rand verbleibt. Die Durchgangsöffnung dient später dem Durchlass des in den Rohren strömenden gasförmigen Mediums, beispielsweise Abgas. Anschließend werden in den Rand zumindest zwei Einschrauböffnungen eingebracht und zwar entweder mittels Durchstellen oder mittels Ausstanzen. Werden die Einschrauböffnungen mittels Durchstellen eingebracht, kann anschließend ein sich daran anschließendes Gewinde durch Umformen, beispielsweise durch Rollieren, einstückig mit dem zweiten Flansch hergestellt werden. Alternativ ist es auch denkbar, an einer Innenseite des zweiten Flansches fluchtend zu den jeweiligen Einschrauböffnungen jeweils eine Mutter anzuordnen, beispielsweise anzulöten oder anzuschweißen.The present invention is further based on the general idea of specifying a simplified and cost-reduced method for producing a diffuser for a heat exchanger described in the previous paragraphs, in which the diffuser is first produced as a one-piece deep-drawn part with a first and a second flange. The second flange is designed as a continuous plane. A through opening is then punched into this plane of the second flange, a circumferential edge formed as a sealing plane remaining around this through opening. The passage opening later serves to allow the in the pipes flowing gaseous medium, for example exhaust gas. Then at least two screw-in openings are made in the edge, either by pushing through or by punching. If the screw-in openings are made by passing through, a subsequent thread can then be produced in one piece with the second flange by reshaping, for example by rolling. Alternatively, it is also conceivable to arrange a nut on an inside of the second flange in alignment with the respective screw-in openings, for example by soldering or welding.
Weitere wichtige Merkmale und Vorteile der Erfindung ergeben sich aus den Unteransprüchen, aus den Zeichnungen und aus der zugehörigen Figurenbeschreibung anhand der Zeichnungen.Further important features and advantages of the invention result from the subclaims, from the drawings and from the associated description of the figures with reference to the drawings.
Es versteht sich, dass die vorstehend genannten und die nachstehend noch zu erläuternden Merkmale nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar sind, ohne den Rahmen der vorliegenden Erfindung zu verlassen.It goes without saying that the features mentioned above and those yet to be explained below can be used not only in the combination indicated in each case, but also in other combinations or on their own without departing from the scope of the present invention.
Bevorzugte Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden in der nachfolgenden Beschreibung näher erläutert, wobei sich gleiche Bezugszeichen auf gleiche oder ähnliche oder funktional gleiche Komponenten beziehen.Preferred exemplary embodiments of the invention are shown in the drawings and are explained in more detail in the following description, the same reference numerals referring to the same or similar or functionally identical components.
Es zeigen, jeweils schematisch,
- Fig. 1
- eine Ansicht auf einen erfindungsgemäßen Wärmeübertrager,
- Fig. 2
- eine Schnittdarstellung durch den gemäß der
Fig. 1 dargestellten Wärmeübertrager, - Fig. 3
- eine Ansicht auf einen erfindungsgemäßen Diffusor des Wärmeübertragers mit ausgesteifter Durchgangsöffnung und drei durch Muttern gebildete Gewinde,
- Fig. 4
- eine Darstellung eines Diffusors nach
Fig. 3 von unten mit Vierkantmuttern, - Fig. 5
- eine Darstellung wie in
Fig. 4 , jedoch mit Sechskantmuttern, - Fig. 6
- eine Darstellung wie in
Fig. 3 , jedoch mit durchgestellten und rollierten Gewinden, - Fig. 7
- eine Ansicht des Diffusors aus
Fig. 6 von unten, - Fig. 8
- eine Schnittdarstellung durch den gemäß der
Fig. 6 gezeigten Diffusor mit durchgestellten und rollierten Gewinden, - Fig. 9
- eine Ansicht auf einen Diffusor mit nicht versteifter Durchgangsöffnung und mittels Vierkantmuttern gebildeten Gewinden,
- Fig. 10
- eine Darstellung des in der
Fig. 9 gezeigten Diffusors von unten, - Fig. 11
- eine Schnittdarstellung durch den gemäß der
Fig. 9 gezeigten Diffusor, - Fig. 12
- eine Darstellung wie in
Fig. 10 , jedoch mit Sechskantmuttern, - Fig. 13
- eine Darstellung wie in
Fig. 11 , jedoch ebenfalls mit Sechskantmuttern, - Fig. 14
- eine Darstellung wie in
Fig. 7 , jedoch ohne ausgesteifte Durchgangsöffnung, - Fig. 15
- eine Schnittdarstellung durch den Diffusor gemäß der
Fig. 14 .
- Fig. 1
- a view of a heat exchanger according to the invention,
- Fig. 2
- a sectional view through the according to the
Fig. 1 heat exchanger shown, - Fig. 3
- 1 shows a view of a diffuser according to the invention of the heat exchanger with a stiffened through opening and three threads formed by nuts,
- Fig. 4
- a representation of a diffuser
Fig. 3 from below with square nuts, - Fig. 5
- a representation like in
Fig. 4 , but with hexagon nuts, - Fig. 6
- a representation like in
Fig. 3 , but with threaded and rolled threads, - Fig. 7
- a view of the diffuser
Fig. 6 from underneath, - Fig. 8
- a sectional view through the according to the
Fig. 6 shown diffuser with through and rolled threads, - Fig. 9
- 1 shows a view of a diffuser with a non-stiffened through opening and threads formed by means of square nuts,
- Fig. 10
- a representation of the in the
Fig. 9 shown diffuser from below, - Fig. 11
- a sectional view through the according to the
Fig. 9 shown diffuser, - Fig. 12
- a representation like in
Fig. 10 , but with hexagon nuts, - Fig. 13
- a representation like in
Fig. 11 , but also with hexagon nuts, - Fig. 14
- a representation like in
Fig. 7 , but without stiffened through opening, - Fig. 15
- a sectional view through the diffuser according to the
Fig. 14 .
Entsprechend den
According to the
Eine Innenkontur des ersten Flansches 10 ist dabei komplementär zu einer Außenkontur des Gehäuses 6 ausgebildet, so dass der Diffusor 9 mit seinem ersten Flansch 10 über das Gehäuse 6 schiebbar und dort dicht mit diesem verbindbar, insbesondere verlötbar ist.An inner contour of the
Im Bereich des zweiten Flansches 11 sind zumindest zwei, im vorliegenden Fall jeweils drei Gewinde 12 angeordnet, über welche ein Verschrauben mit einem vor- oder nachgeschalteten Bauteil, beispielsweise einer Abgasleitung, möglich ist. Die Gewinde 12 können dabei auf unterschiedlichste Art und Weise realisiert werden, wie dies nachfolgend beschrieben wird:
Bei den gemäß den
According to the
Alternativ zu den Muttern 13 können die Gewinde 12 auch durch Umformen, insbesondere durch Durchstellen der Einschrauböffnungen 14 in den zweiten Flansch 11 und anschließendes Rollieren einstückig mit dem zweiten Flansch 11 hergestellt werden, wie dies beispielsweise bei den Diffusoren 9 gemäß den
Betrachtet man die
Generell kann der erfindungsgemäße Diffusor 9 vergleichsweise einfach hergestellt werden, indem dieser zunächst als einstückiges Tiefziehteil mit einem ersten und einem zweiten Flansch 10, 11 hergestellt, d.h. tiefgezogen wird, wobei der zweite Flansch 11 als Ebene ausgebildet ist. In diese Ebene des zweiten Flansches 11 wird nun eine Durchgangsöffnung 19 eingestanzt, wobei um die Durchgangsöffnung 19 herum ein als Dichtebene 17 ausgebildeter, umlaufender Rand 18 verbleibt. Gleichzeitig mit dem Ausstanzen der Durchgangsöffnung 19 kann optional an dieser auch der umlaufende Kragen 20 umgeformt werden. In den Rand 18 werden nun zumindest zwei, im vorliegenden Fall drei, Einschrauböffnungen 14 eingebracht, wobei nunmehr alternativ im Bereich der Einschrauböffnungen 14 jeweils ein Gewinde 13 durch Umformen, insbesondere durch Rollieren, einstückig mit dem zweiten Flansch 11 hergestellt wird, wie dies beispielsweise gemäß den
Mit dem erfindungsgemäßen Diffusor 9 und dem diesen beinhaltenden erfindungsgemäßen Wärmeübertrager 1 kann letzterer vergleichsweise einfach und kostengünstig und zudem leicht ausgebildet werden, insbesondere im Vergleich zu aus dem Stand der Technik bekannten Diffusoren, welche beispielsweise als Gussteil ausgebildet sind oder aus mehreren einzelnen Tiefziehteilen zusammengefügt werden müssen.With the
Claims (5)
- Heat transfer device (1), in particular an exhaust gas heat transfer device, comprising- tubes (5) held at both ends in a tube sheet (3,4), for conducting a gaseous medium,- a housing (6) adjoining the tube sheets (3,4) and enclosing the tubes (5), to conduct a cooling medium,- at least one diffuser (9) which adjoins the tube sheet (3, 4) and/or the housing (6) on the outlet side or on the inlet side and which has a first flange (10) facing the housing (6) and a second flange (11) facing away therefrom, wherein the at least one diffuser (9) is formed with the two flanges (10, 11) as a one-piece deep-drawn part,characterised in that,- at least two threads (12) are arranged in the region of the second flange (11), via which threads screw engagement to an upstream or downstream component is possible,- the at least two threads (12) are produced in one piece with the second flange (11) by reshaping, in particular by placing two screw openings (14) through the second flange (11) and subsequent rolling, or the at least two threads (12) are each formed from a nut (13), which nut is arranged on an inner side of the second flange (11), in alignment with an associated screw opening (14).
- Heat transfer device according to claim 1,
characterised in that
an inner contour of the first flange (10) has a complementary form to an outer contour of the housing (6), so that the diffuser (9) with its first flange (10) can be pushed over the housing (6). - Heat transfer device according to claim 1 or 2,
characterised in that
the at least two nuts (13) are welded or soldered to the second flange (11). - Heat transfer device according to any one of claims 1 to 3,
characterised in that
the second flange (11) has a sealing plane (17) with a circumferential border (18), the screw openings (14) being arranged in the region of the border (18). - Method of manufacturing a diffuser (9) for a heat tramsfer device (1) according to any one of claims 1 to 4, wherein- the diffuser (9) is produced as a one-piece deep-drawn part with a first and a second flange (10, 11), the second flange (11) being formed as a plane,- a through opening (19) is punched into the plane of the second flange (11), a circumferential border (18) formed as a sealing plane (17) remaining around this through opening (19),- at least two screw openings (14) are made in the border (18),- in the region of each of the screw openings (14), a thread (12) is produced in one piece with the second flange (11) by reshaping, in particular by rolling, or- a nut (13) is arranged, in particular being soldered or welded, on an inner side of the second flange (11), in alignment with each of the screw openings (14).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IN331KO2015 | 2015-03-26 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3088834A1 EP3088834A1 (en) | 2016-11-02 |
EP3088834B1 true EP3088834B1 (en) | 2020-05-06 |
Family
ID=55628936
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16162358.2A Active EP3088834B1 (en) | 2015-03-26 | 2016-03-24 | Heat exchanger |
Country Status (1)
Country | Link |
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EP (1) | EP3088834B1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3079267B1 (en) * | 2018-03-23 | 2020-09-11 | Valeo Systemes Thermiques | INTERNAL COMBUSTION ENGINE INTAKE AIR COOLING SYSTEM |
EP3564613A1 (en) | 2018-05-03 | 2019-11-06 | Mann+Hummel GmbH | Heat exchanger, air intake system with a heat exchanger and method for mounting a heat exchanger |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19907163C2 (en) | 1998-04-24 | 2003-08-14 | Behr Gmbh & Co | Heat exchanger, in particular exhaust gas heat exchanger |
ES2199060B1 (en) * | 2002-05-30 | 2004-11-16 | Valeo Termico, S.A. | HEAT EXCHANGER FOR GASES. |
DE10229083A1 (en) | 2002-06-28 | 2004-01-15 | Modine Manufacturing Co., Racine | Heat exchanger with a diffuser |
DE10359054A1 (en) * | 2003-12-17 | 2005-07-21 | Daimlerchrysler Ag | Flange for exhaust manifold of motor vehicle, has metal sheet shaped part that is manufactured by reverse stamping technique, and fastening units connected to openings provided on either sides of central opening of metal sheet part |
US7661415B2 (en) * | 2004-09-28 | 2010-02-16 | T.Rad Co., Ltd. | EGR cooler |
DE102013218867A1 (en) * | 2012-09-20 | 2014-03-20 | Behr Gmbh & Co. Kg | Heat exchanger used in combustion engine, has tubesheets that are arranged between housing and fluid conducting pipes, and partially rotating flange that is projected radially from housing |
-
2016
- 2016-03-24 EP EP16162358.2A patent/EP3088834B1/en active Active
Non-Patent Citations (1)
Title |
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None * |
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