EP2378233A2 - Echangeur de chaleur pour un moteur à combustion - Google Patents

Echangeur de chaleur pour un moteur à combustion Download PDF

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Publication number
EP2378233A2
EP2378233A2 EP11162175A EP11162175A EP2378233A2 EP 2378233 A2 EP2378233 A2 EP 2378233A2 EP 11162175 A EP11162175 A EP 11162175A EP 11162175 A EP11162175 A EP 11162175A EP 2378233 A2 EP2378233 A2 EP 2378233A2
Authority
EP
European Patent Office
Prior art keywords
tube
heat exchanger
base tube
pots
deep
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP11162175A
Other languages
German (de)
English (en)
Other versions
EP2378233A3 (fr
Inventor
Thomas Ilgner
Andreas Roth
Christoph Lempa
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.)
Benteler Automobiltechnik GmbH
Original Assignee
Benteler Automobiltechnik 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 Benteler Automobiltechnik GmbH filed Critical Benteler Automobiltechnik GmbH
Publication of EP2378233A2 publication Critical patent/EP2378233A2/fr
Publication of EP2378233A3 publication Critical patent/EP2378233A3/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • 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
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
    • 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
    • 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
    • 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

Definitions

  • the invention relates to a heat exchanger according to the features of claim 1.
  • Heat exchangers are used, for example, for heat recovery or cooling of the exhaust gas portion of an internal combustion engine intended for recirculation.
  • the recirculation to the combustion air in particular when lean mixtures are used in combination with high combustion temperatures, the proportion of nitrogen oxides harmful to the environment is reduced in the exhaust gas.
  • the cooled down by the heat exchanger and the combustion process supplied exhaust gas reduces the excess air contained in the fresh air and at the same time reduces the combustion temperature, which sets a much lower emission combustion.
  • the mixture which is expanded by non-flammable components, makes it possible to reduce specific fuel consumption, particularly in the partial load range of the engine.
  • the exhaust gas comes into contact without mixing with a cooling fluid, as a result of which a temperature difference existing between the two fluids is exchanged.
  • the efficiency of the heat exchanger is determined by the area available for temperature exchange.
  • Exhaust gas guiding tubes are arranged, which are circumferentially flowed around by the cooling fluid.
  • the structure provides for this purpose a base tube, which is connected in each case at the end to a tube plate.
  • the individual tubes are combined to form a tube bundle. This extends within the base tube between the opposite tube sheets and is connected thereto.
  • the base tube connected to the tube plates in this case forms a chamber through which the cooling fluid can flow, which is passed through the tube bundle by the exhaust gas.
  • the individual components In order to prevent an improper exit of the exhaust gas and its mixing with the cooling fluid, the individual components must be connected to a dense in itself and to the outside heat exchanger.
  • the base pipe with the end-side tube sheets to a closed chamber closing connections here represent an increased effort in the joining of the individual components.
  • the DE 10 2008 046 507 A1 describes a charge air cooler for internal combustion engines, which receives a cooling block in an air guide housing and at least one air connection housing.
  • the air duct housing is divided in a vertical plane into two outer housing parts. Between the two outer housing parts, a middle housing part of different dimensions can be used.
  • a device for exhaust gas cooling is disclosed.
  • This is a heat exchanger for cooling exhaust gases with a housing, a plurality of heat transfer tubes arranged in a bundle parallel to one another, two tubesheets and at least one support plate.
  • the housing is made up of a jacket and two end caps. On the jacket, an inlet and an outlet for a coolant are provided.
  • the end caps have an inlet and an outlet for exhaust gases.
  • the tubesheets are disposed near the two ends of the shell and intended to receive the heat transfer tubes.
  • the support plate is arranged in the jacket and provided with openings and through holes.
  • the support plate extends essentially over the entire cross-section of the shell and has at the outer periphery and / or at the periphery of the through holes through slots separate, tongue-like parts.
  • the tongue-like parts are bent in the direction of the jacket or the heat transfer tubes and have before installation in the heat exchanger on a diameter which is slightly larger than the inner diameter of the shell or smaller than the outer diameter of the heat transfer tubes to the support plate by means of the restoring forces of to fix when inserting elastically deformed, tongue-like parts in the interior of the jacket.
  • the DE 103 12 529 B3 describes a waste heat boiler.
  • the waste heat boiler consists of a tube bundle heat exchanger permanently installed in a pressure vessel and a downstream gasification device.
  • at least one displacement body extending over part of the length of the pipe is centrally coaxially inserted to form an annular space with the inside of the pipe.
  • the displacement body is made of graphite.
  • the DE 10 2008 018 594 A1 describes a heat exchanger for heat exchange between a first and a second fluid and a use of the heat exchanger.
  • the heat exchanger has a block and a bottom.
  • the block which has a number of flow passages through which the first fluid flows, furthermore has a housing which receives the flow passages and can be flowed through by the second fluid.
  • the bottom is fixed to the box lid and is provided with one or more passage openings for flow channels.
  • the box lid is fixed on the ground via at least one compound as a screw connection and / or Schlitzbördelung.
  • the object of the invention is to improve a generic heat exchanger for a motor vehicle for cooling a part of an exhaust gas of an internal combustion engine intended for recirculation in such a way that the number of components to be joined and thus also the number of tightly sealed connections is reduced.
  • the invention provides a heat exchanger for an internal combustion engine. This can serve, for example, for cooling a part of an exhaust gas intended for recycling for a motor vehicle.
  • the heat exchanger in this case has a base tube which is connected to the end tube sheets. Within the base tube, a tube bundle extending between the tubesheets and connected to the individual tubesheets is arranged.
  • the base tube is formed from two interconnected deep-drawn cups, wherein the individual tubesheets are in each case an integral part of the deep-drawn cups. That is, the tube sheet is not separately connected to the base tube, but consists of one piece with the base tube.
  • the particular advantage lies in a reduction of the necessary components for the heat exchanger, which are also process reliable by deep drawing produced.
  • thermoforming tubes forming the base tube together with the tubesheets may be of identical construction, whereby only a single mold is necessary.
  • the omission of the base tube with the end tube sheets to a chamber-closing connections allows an undisturbed surface transition of the components into one another, thereby eliminating possible reworking of the compounds.
  • thermoforming cups has a circumferential widening at its edge opposite the tubesheet, wherein the two thermoforming cups are connected to one another in the region of the widening.
  • the thermoforming pots preferably engage in each other in the area of expansion.
  • the expansion allows a quick and aligned connection, which is achieved by a nesting.
  • the expansion can already be introduced into the deep-drawn pot during the deep-drawing process.
  • the expansion may be curved outwards towards the outer edge of the deep-drawing pot, thereby facilitating the nesting of the deep-drawing heads.
  • the configuration of the expansion in addition to the form-fitting also have a frictional connection, whereby the nested pots have a firm connection with each other.
  • the base tube has a cylindrical cross-section, wherein basically also angular or oval shapes are possible.
  • the cylindrical cross-section causes a balanced expansion and stress distribution of the sometimes stressed by high temperatures ground tube.
  • the invention provides that the two deep-drawing heads are bonded together in a material-locking manner.
  • bonding in this case, in particular welding, wherein a soldered connection is preferred.
  • the tube bundle extending within the base tube is mounted with its individual tubes each in opposite openings of the tubesheets.
  • the openings of the tubesheets can already be introduced into the tubesheets in connection with the deep-drawing process for producing the thermoforming pots.
  • the individual openings give the tubesheets the characteristics of a perforated plate.
  • the openings may for example be introduced by drilling or punching and thereby also have the form of passages.
  • Both the individual tubes and the openings may have a circular cross-section.
  • the tubes used can be made to standard cross sections. In principle, however, it is also possible, for example, to choose angular or oval cross sections.
  • Another advantage lies in the arrangement rotatable about the longitudinal axis of the tubes within the openings.
  • the tubes of the tube bundle are materially connected to the respective tube plates. In addition to bonding or welding, these preferably have a solder joint.
  • the base tube in the region of the tube plates has an at least one of the tube plates arranged end cap, wherein the end cap is connected to the base tube.
  • the end cap in this case has a tight connection to the base tube, which is made for example by gluing or welding, preferably by soldering. In principle, a tight clamping connection is conceivable.
  • the end cap serves to supply or discharge the exhaust gas flowing through the individual tubes of the tube bundle.
  • the invention provides that in each case one of the deep-drawn pans has an inlet and / or an outlet on the circumference. Via the inlet, a cooling fluid can be introduced into the chamber formed by the base tube and the end tube plates and leave them again through the outlet. In this case, the cooling fluid flows around the individual tubes of the tube bundle, whereby the temperature of the flowing in the tube bundle exhaust gas is lowered. In order to achieve a uniform flow around the individual tubes of the tube bundle with the cooling fluid, flow internals may be provided within the base tube, which the line of the Cooling fluids serve.
  • the invention thus provides a heat exchanger which is extremely economical to produce and which offers a time advantage, in particular in the time-intensive part for producing the connections, by reducing them.
  • the construction of the heat exchanger of interconnected thermoforming pots reduces the otherwise necessary number of components from three pieces to two pieces.
  • the connections necessary for connecting the components are reduced from two to one piece.
  • the necessary thermoforming pots can be manufactured with a high clock rate and connected to each other. By reducing the necessary connections, the risk of possible leaks is reduced, reducing the possible rejects and the necessary rework to a minimum.
  • FIG. 1 illustrated construction of a known from the prior art heat exchanger 1 has a base tube 2 with end-side tube sheets 3.
  • the illustrated in a side view of the base tube 2 has a cylindrical cross section, which is encompassed by the end of the tube sheets 3.
  • the tubesheets 3 have an edge 4 which is angled away from them at right angles and which extends circumferentially around the tubesheets 3 in each case.
  • the edge 4 is designed so that its inner circumference corresponds to the outer circumference of the base tube 2, whereby the tube plates 3 are placed with their respective edge 4 positively on the base tube 2.
  • the tube plates 3 In the likewise illustrated view of the tube plates 3, it can be seen that they have a large number of openings 5.
  • the openings 5 have a circular cross-section.
  • each individual tubes 6 are arranged, which are not shown in detail as the tube bundle 7 within the base tube. 2 extend between the tube sheets 3 and are mounted in the opposite openings 5 of the tube sheets 3.
  • FIG. 2 shows a heat exchanger 1a according to the invention.
  • this also has a base tube 2a with end-side tube plates 3a.
  • the base tube 2a is in this case formed of two interconnected deep-drawing heads 8.
  • the tube plates 3a are each integral part of the deep-drawing pots 8 and made in one piece with them.
  • these have a multiplicity of openings 5a.
  • the openings 5a each have a circular cross-section.
  • each individual tubes 6a are arranged, which extend as not shown in detail tube bundle 7a within the base tube 2a between the tube plates 3a of the deep-drawn pans 8 and are mounted in the opposite openings 5a of the tube plates 3a.
  • One of the deep-drawing pots 8 has a peripheral widening 9 at the edge.
  • the two thermoforming cups 8 are pushed into each other in the area of the expansion 9 and connected to each other.
  • the deep-drawn pot 8 left in the image plane, which does not have a widening 9, shows an inlet 10, which is arranged on the circumference of the base tube 2 a formed from the deep-drawn pots 8 near one of the tube plates 3 a.
  • the base tube 2a has an inlet 11 opposite the outlet 11.
  • the region of the base tube 2a around the inlets 10, 11 forms a substantially flat plane, which is exposed out of the base tube 2a.
  • the inner sides of the inlets 10, 11 lie in their longitudinal axes on the inner radius of the base tube 2a, so that only the extending in the circumferential direction of the base tube 2a flat portions of the inlet 10 are issued from the base tube 2a out.
  • an end cap 12 arranged thereon is shown in an exploded view, which is connected to the base tube 2 a. This serves to supply or discharge of the exhaust gas flowing through the heat exchanger 1a via its respective tubes 6a.
  • the heat exchanger 1, 1a is flowed through by a flowing within its tubes 6, 6a of the tube bundle 7, 7a hot exhaust gas. This is supplied, for example, through the end cap 12 to the respective tube bundle 7a or removed therefrom.
  • a cooling fluid flows through the chamber formed from the base tube 2a and the tube plates 3a, wherein it flows around the individual tubes 6a and is deflected, for example, by internals.
  • the cooling fluid is used for temperature exchange with the exhaust gas and thus its cooling.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP11162175.1A 2010-04-19 2011-04-13 Echangeur de chaleur pour un moteur à combustion Withdrawn EP2378233A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010015622 2010-04-19
DE102010025030A DE102010025030B4 (de) 2010-04-19 2010-06-24 Wärmetauscher für einen Verbrennungsmotor

Publications (2)

Publication Number Publication Date
EP2378233A2 true EP2378233A2 (fr) 2011-10-19
EP2378233A3 EP2378233A3 (fr) 2013-12-04

Family

ID=44246593

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11162175.1A Withdrawn EP2378233A3 (fr) 2010-04-19 2011-04-13 Echangeur de chaleur pour un moteur à combustion

Country Status (2)

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EP (1) EP2378233A3 (fr)
DE (1) DE102010025030B4 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016091806A1 (fr) * 2014-12-08 2016-06-16 Mahle International Gmbh Échangeur de chaleur

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015210942A1 (de) 2015-06-15 2016-12-15 Mahle International Gmbh Wärmeübertrager

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE563894C (de) * 1930-04-29 1932-11-11 Zimmermann & Co Waermeaustauscher mit um seine Achse schraubenfoermig gebogenen Rohren
FR809382A (fr) * 1936-07-09 1937-03-02 Appareil gazéificateur pour l'utilisation du gas-oil dans les moteurs à essence
DE3640970A1 (de) * 1986-11-29 1988-06-09 Gutehoffnungshuette Man Rohrbuendelwaermetauscher
US4989670A (en) * 1988-05-19 1991-02-05 York International Corp. Heat exchanger
DE19957379A1 (de) * 1998-11-27 2000-06-21 Usui Kokusai Sangyo Kk EGR-Kühler
DE19721132C2 (de) 1996-05-22 2003-05-08 Usui Kokusai Sangyo Kk Vorrichtung zur Abgaskühlung
DE10312529B3 (de) 2003-03-20 2004-06-24 Lurgi Ag Abhitzekessel
EP1770343A1 (fr) * 2005-09-29 2007-04-04 Wevista Echangeur thermique cintre
DE102005058314A1 (de) * 2005-12-07 2007-06-21 Daimlerchrysler Ag Wärmetauscher
DE102008018594A1 (de) 2007-04-11 2008-10-16 Behr Gmbh & Co. Kg Wärmetauscher
DE102008046507A1 (de) 2008-09-09 2010-03-11 Behr Industry Gmbh & Co. Kg Ladeluftkühler, insbesondere für Großmotoren

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4074044B2 (ja) * 2000-03-29 2008-04-09 カルソニックカンセイ株式会社 Ｅｇｒガス冷却装置のコア部およびその製造方法
JP4602714B2 (ja) * 2004-08-19 2010-12-22 株式会社ティラド 熱交換器
US7228890B2 (en) * 2005-11-15 2007-06-12 Honeywell International, Inc. Heat exchanger with integral shell and tube plates

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE563894C (de) * 1930-04-29 1932-11-11 Zimmermann & Co Waermeaustauscher mit um seine Achse schraubenfoermig gebogenen Rohren
FR809382A (fr) * 1936-07-09 1937-03-02 Appareil gazéificateur pour l'utilisation du gas-oil dans les moteurs à essence
DE3640970A1 (de) * 1986-11-29 1988-06-09 Gutehoffnungshuette Man Rohrbuendelwaermetauscher
US4989670A (en) * 1988-05-19 1991-02-05 York International Corp. Heat exchanger
DE19721132C2 (de) 1996-05-22 2003-05-08 Usui Kokusai Sangyo Kk Vorrichtung zur Abgaskühlung
DE19957379A1 (de) * 1998-11-27 2000-06-21 Usui Kokusai Sangyo Kk EGR-Kühler
DE10312529B3 (de) 2003-03-20 2004-06-24 Lurgi Ag Abhitzekessel
EP1770343A1 (fr) * 2005-09-29 2007-04-04 Wevista Echangeur thermique cintre
DE102005058314A1 (de) * 2005-12-07 2007-06-21 Daimlerchrysler Ag Wärmetauscher
DE102008018594A1 (de) 2007-04-11 2008-10-16 Behr Gmbh & Co. Kg Wärmetauscher
DE102008046507A1 (de) 2008-09-09 2010-03-11 Behr Industry Gmbh & Co. Kg Ladeluftkühler, insbesondere für Großmotoren

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016091806A1 (fr) * 2014-12-08 2016-06-16 Mahle International Gmbh Échangeur de chaleur
US11002490B2 (en) 2014-12-08 2021-05-11 Mahle International Gmbh Heat exchanger with housing parts connected by flange ring connection

Also Published As

Publication number Publication date
EP2378233A3 (fr) 2013-12-04
DE102010025030A1 (de) 2011-10-20
DE102010025030B4 (de) 2012-01-12

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