EP3088834B1 - Fluide caloporteur - Google Patents

Fluide caloporteur Download PDF

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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
Authority
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.)
Active
Application number
EP16162358.2A
Other languages
German (de)
English (en)
Other versions
EP3088834A1 (fr
Inventor
Albrecht Siegel
Simon HUND
Pramod Barhate
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mahle International GmbH
Original Assignee
Mahle International GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mahle International GmbH filed Critical Mahle International GmbH
Publication of EP3088834A1 publication Critical patent/EP3088834A1/fr
Application granted granted Critical
Publication of EP3088834B1 publication Critical patent/EP3088834B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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 .

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

Claims (5)

  1. Échangeur de chaleur (1), en particulier échangeur de chaleur de gaz d'échappement, avec
    - des tubes (5) maintenus aux deux extrémités dans un fond de tube (3, 4) et destinés à guider un fluide gazeux,
    - un carter (6) qui se raccorde aux fonds de tubes (3, 4) et entoure les tubes (5) et qui est destiné à guider un fluide de refroidissement,
    - au moins un diffuseur (9) qui se raccorde côté sortie ou côté entrée au fond de tube (3, 4) et/ou au carter (6) et qui comporte une première collerette (10) proche du carter (6) et une deuxième collerette (11) éloignée de celui-ci, lequel au moins un diffuseur (9) est réalisé avec les deux collerettes (10, 11) en tant que pièce emboutie profondément d'un seul tenant,
    caractérisé en ce que
    - dans la zone de la deuxième collerette (11), sont agencés au moins deux filetages (12) par l'intermédiaire desquels un vissage avec une pièce de construction placée en amont ou en aval est possible,
    - les au moins deux filetages (12) sont fabriqués d'un seul tenant avec la deuxième collerette (11) par formage, en particulier en pratiquant deux ouvertures de vissage (14) dans la deuxième collerette (11) et en effectuant ensuite une déformation au rouleau, ou les au moins deux filetages (12) sont formés par à chaque fois un écrou (13) qui est agencé au niveau d'un côté intérieur de la deuxième collerette (11), aligné avec une ouverture de vissage (14) associée.
  2. Échangeur de chaleur selon la revendication 1,
    caractérisé en ce qu'un
    contour intérieur de la première collerette (10) est conçu complémentaire d'un contour extérieur du carter (6) de telle sorte que le diffuseur (9) peut être glissé avec sa première collerette (10) par-dessus le carter (6).
  3. Échangeur de chaleur selon la revendication 1 ou 2,
    caractérisé en ce que
    les au moins deux écrous (13) sont soudés ou brasés avec la deuxième collerette (11).
  4. Échangeur de chaleur selon l'une quelconque des revendications 1 à 3,
    caractérisé en ce que
    la deuxième collerette (11) comporte un plan d'étanchéité (17) avec un bord périphérique (18), les ouvertures de vissage (14) étant agencées dans la zone du bord (18).
  5. Procédé de fabrication d'un diffuseur (9) pour un échangeur de chaleur (1) selon l'une quelconque des revendications 1 à 4, dans lequel
    - le diffuseur (9) est fabriqué en tant que pièce emboutie profondément d'un seul tenant avec une première et une deuxième collerette (10, 11), laquelle deuxième collerette (11) est conçue comme un plan,
    - une ouverture de passage (19) est estampée dans le plan de la deuxième collerette (11), un bord périphérique (18) conçu comme plan d'étanchéité (17) restant alors autour de cette ouverture de passage (19),
    - au moins deux ouvertures de vissage (14) sont pratiquées dans le bord (18),
    - dans la zone des ouvertures de vissage (14), un filetage (12) est fabriqué à chaque fois d'un seul tenant avec la deuxième collerette (11) par formage, en particulier par déformation au rouleau, ou
    - aligné avec les ouvertures de vissage (14), un écrou (13) est agencé, en particulier brasé ou soudé, à chaque fois au niveau d'un côté intérieur de la deuxième collerette (11).
EP16162358.2A 2015-03-26 2016-03-24 Fluide caloporteur Active EP3088834B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IN331KO2015 2015-03-26

Publications (2)

Publication Number Publication Date
EP3088834A1 EP3088834A1 (fr) 2016-11-02
EP3088834B1 true EP3088834B1 (fr) 2020-05-06

Family

ID=55628936

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16162358.2A Active EP3088834B1 (fr) 2015-03-26 2016-03-24 Fluide caloporteur

Country Status (1)

Country Link
EP (1) EP3088834B1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3079267B1 (fr) * 2018-03-23 2020-09-11 Valeo Systemes Thermiques Dispositif de refroidissement d’un air d’admission de moteur a combustion interne
EP3564613A1 (fr) 2018-05-03 2019-11-06 Mann+Hummel GmbH Échangeur de chaleur, système d'admission d'air avec échangeur de chaleur et procédé de montage d'un échangeur de chaleur

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19907163C2 (de) 1998-04-24 2003-08-14 Behr Gmbh & Co Wärmetauscher, insbesondere Abgaswärmetauscher
ES2199060B1 (es) * 2002-05-30 2004-11-16 Valeo Termico, S.A. Intercambiador de calor para gases.
DE10229083A1 (de) 2002-06-28 2004-01-15 Modine Manufacturing Co., Racine Wärmetauscher mit einem Diffusor
DE10359054A1 (de) * 2003-12-17 2005-07-21 Daimlerchrysler Ag Flansch
US7661415B2 (en) * 2004-09-28 2010-02-16 T.Rad Co., Ltd. EGR cooler
DE102013218867A1 (de) * 2012-09-20 2014-03-20 Behr Gmbh & Co. Kg Wärmeübertrager

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
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