EP0772018B1 - Heat exchanger for cooling exhaust gas - Google Patents

Heat exchanger for cooling exhaust gas Download PDF

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Publication number
EP0772018B1
EP0772018B1 EP96115729A EP96115729A EP0772018B1 EP 0772018 B1 EP0772018 B1 EP 0772018B1 EP 96115729 A EP96115729 A EP 96115729A EP 96115729 A EP96115729 A EP 96115729A EP 0772018 B1 EP0772018 B1 EP 0772018B1
Authority
EP
European Patent Office
Prior art keywords
heat
exchanger according
tube
sheet
welded
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.)
Expired - Lifetime
Application number
EP96115729A
Other languages
German (de)
French (fr)
Other versions
EP0772018A2 (en
EP0772018A3 (en
Inventor
Herbert Dr.-Ing. Damsohn
Conrad Dr.-Ing. Pfender
Thomas Dipl.-Ing. Karbach (Th)
Jan Wenzelburger
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 Behr GmbH and Co KG
Original Assignee
Behr GmbH and Co KG
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 Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Publication of EP0772018A2 publication Critical patent/EP0772018A2/en
Publication of EP0772018A3 publication Critical patent/EP0772018A3/en
Application granted granted Critical
Publication of EP0772018B1 publication Critical patent/EP0772018B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/04—Tubular elements of cross-section which is non-circular polygonal, e.g. rectangular
    • 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
    • F28D7/1684—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 the conduits having a non-circular cross-section
    • 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
    • F28D9/00—Heat-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
    • F28D9/0031—Heat-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 for one heat-exchange medium being formed by paired plates touching each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
    • 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
    • F28F9/0246—Arrangements for connecting header boxes with flow lines
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49373—Tube joint and tube plate structure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49391—Tube making or reforming

Definitions

  • the invention relates to a heat exchanger for cooling Exhaust gas from an internal combustion engine with a plurality of channels for guiding the exhaust gas, which is inclined to the flow direction of the exhaust gas arranged in pairs, from at least one wall of the channels protruding tabs and on the outside with a liquid Coolant can flow around.
  • the invention has for its object a heat exchanger to create the type mentioned, which at essentially same structure can be manufactured in different sizes is, for the individual components none too high dimensional tolerances must be observed.
  • This object is achieved in that as channels for the exhaust gas a bundle of rectangular tubes is provided, the ends of which are welded into grid-shaped tube sheets that the bundle is surrounded by rectangular tubes with a sheet metal jacket, which the Contour of the bundle follows, which enters with a cooling medium and is provided with a cooling medium outlet and with the Tube sheets is welded, and that the ends of the sheet metal jacket are provided with welded flange plates, each through a central opening to the bundle of rectangular tubes are open and with fasteners for fastening are provided on pipe sections of an exhaust pipe.
  • the heat exchanger according to the invention consists in essentially made of sheet metal components that are manufactured in a simple manner can be. Welding is preferred as laser welding or micro TIG welding.
  • the lattice-shaped Tube sheets made of sheet steel from about 1mm to 3mm thickness are punched, according to the number and Arrangement of rectangular tubes breakthroughs.
  • the distances of the Rectangular tubes and thus the web width of the tube sheet varies depending on the mass flow of the coolant and is also in the range between 1mm and 3mm.
  • the outer contour the tube sheets result from the number and arrangement of the flat tubes.
  • the sheet metal jacket also becomes easier Made of sheet steel, the one of the tube sheets has similar sheet thickness.
  • the sheet metal jacket can be in Steps according to the contour of the tube sheets in simple Way be edged.
  • the provided with fasteners Flange plates allow an arrangement of the Heat exchanger between two pipe sections of an exhaust pipe, for example in a manner similar to the arrangement of a catalyst.
  • the rectangular tubes each made of two welded together Pipe shells are formed.
  • the pair of tabs can be attached directly to the rectangular tube or Be part of this rectangular tube.
  • the flange plates in diametrically opposite one another Areas are provided with threaded sleeves. This is a screw connection with a simple Counter flange of a pipe section of an exhaust pipe possible.
  • the sheet metal jacket near the in the flow direction of the Exhaust front flange plate with a coolant inlet and near the rear flange plate with a coolant outlet is provided. It is first achieved that the cooling medium in direct current to the exhaust gas through the heat exchanger is directed. This ensures that the danger of Vapor formation on the inlet side of the exhaust gas is reduced is because here the cooling medium is the relatively lowest temperature having.
  • cooling medium inlet and the cooling medium outlet on opposite Sides of the sheet metal jacket are arranged. Because of this arrangement are the flow paths of the individual Current paths for the cooling medium around the rectangular tubes in the essentially the same length, so that a uniform flow this rectangular tubes is guaranteed.
  • the sheet metal jacket is composed of two preformed sheet metal shells is that by means of joint connections to the tube sheets connect.
  • the two sheet metal shells result after welding a rigid and pressure-resistant housing.
  • the provision of joint connections has the advantage that those to be welded Elements a certain cohesion even before welding have, so that the welding process is relatively simple can be carried out.
  • the heat exchanger shown in Figures 1 and 2 has one Bundle of flat tubes (10) that have a wall thickness in the area have from 0.3mm to 0.4mm.
  • the ends of the rectangular tubes (10) are inserted into grid-shaped tube sheets (11) and welded to them.
  • These tube sheets (11) are made punched a steel sheet that is a sheet thickness of the order of magnitude from 1mm to 3mm.
  • the bridges between the Have breakthroughs that serve to accommodate the flat tubes a width that is approximately the wall thickness of the rectangular tubes (10) corresponds.
  • the arrangement of the breakthroughs and thus the The webs of the tube sheets (11) are selected so that they are roughly approximated a circular or oval cross section is created.
  • the webs surrounding the external rectangular tubes have the same web width, so that the outer contour of the Tube sheets of the contour of the tube bundle - enlarged by the Bridge width - corresponds.
  • the tube sheets (11) are in the ends of a sheet metal jacket (12) welded, which is also indicated by dashed lines in Fig. 7.
  • the sheet metal jacket (12) consists of two half-shells made of sheet steel, the one essentially the thickness of the tube sheets (11) has the appropriate thickness.
  • the half shells are corresponding the outer contour of the tube sheets (11) shaped, for example folded or using a high pressure forming process.
  • the two half-shells of the sheet metal jacket (12) are Longitudinal weld seams (13) joined together.
  • the tube sheets (11) with a total of four somewhat widened approaches (14) provided the corresponding Cutouts at the end of the two half-shells of the sheet metal jacket (12) are assigned, so that hereby a joint connection is created.
  • flange sheets (15) At the two ends of the sheet metal jacket (12) are flange sheets (15) welded, which are also stamped from sheet metal and which is a sheet thickness similar to the sheet thickness of the tube sheets (11) exhibit.
  • the flange plates (15) are diametrically divided opposite areas laterally over the contour of the Sheet metal over. In this area the sheet metal jacket (12) extended in the axial direction beyond the tube sheets (11) and with these extended approaches into slit-shaped recesses (17) of the flange plates (15) are inserted. In this A weld is made from the outside of the area Flange plates (15) ago, while in the remaining area a weld is provided from the other side.
  • the Flange plates (15) a medium, preferably circular Recess (18), the dimensions of which precede and follow, Pipe pieces, not shown, of an exhaust system or exhaust system of a vehicle.
  • the threaded sleeves (20) shown in Fig. 8, on their open side assigned to the flange plates (15) with a Ring collar (22) are also provided on their closed Side with a ring collar (23) with which they are each inserted into a connecting pipe (24).
  • the connecting pipe (24) and the threaded sleeve (20) are each with a weld seam (25) welded together. The outside the weld seam (25) is ground off. After that, in the connecting pipe (24) milled into a lateral recess (26).
  • the threaded sleeves (20) are with their ring collar (23) welded into recesses in the flange plates (15) and with welded the flange plates (15).
  • the connecting pipes (24) are additionally attached to the sheet metal jacket by means of retaining webs (27) welded on.
  • the respective outer edges of the holding webs (27) extend tangentially to the connecting pipe (24) to a plane Surface of the sheet metal jacket. They are made of welded cover plates (28) covered on the sheet metal jacket (12), the Retaining webs (27), the connecting tube (24), the threaded sleeves (20) and the flange plate (15) are welded. So that will in the area of the recesses (26) between the holding webs (27) and the flange plates (15) form a kind of water tank, in its area the sheet metal jacket with an entry opening is provided.
  • the rectangular tubes are in pairs arranged, facing each other from opposite walls protruding tabs (32) provided obliquely to the direction of flow of the exhaust gas are arranged so that they of diverge at a narrow point at an angle of about 40 °.
  • the rectangular tubes each consist of two tube shells (10 ') welded together, each on their Narrow sides are welded together.
  • the pipe shells have a sheet thickness of about 0.3mm to 0.4mm.
  • the tabs (32) have approximately the same strength and a length of about ten times their sheet thickness. You run from one narrowest point where they are about 1.2mm apart, apart at an angle of 40 °.
  • the height of the tabs (32) is about a quarter to a third of the total amount of the flat tubes.
  • the tube halves (10 ') are provided with slots, into which the tabs (32) are inserted and then with the pipe halves (10 ') are welded.
  • the tabs (32) on their the tube halves (10 ') facing side with one or more ridges be provided so that they with the known stud welding technology are welded to the tube halves (10 '), so that the sealing welding is omitted.
  • the tabs (32) of the two tube halves are opposite one another arranged.
  • the tabs (32) of the two tube halves (10 ') are arranged off-center such that the tabs (32) the upper tube and the lower tube (10 ') are offset to one another in the transverse direction.
  • the distance the tabs (32) in the flow direction of the exhaust gas is approximately 30mm.
  • a component which is a folded Sheet metal part (34), which forms pairs of tabs (35).
  • This Component (34) can be in the area of the tabs (35) connecting Webs by means of spot welding on the tube halves (10 ') be attached. This also eliminates sealing welding.
  • the one connecting the tabs (35) Web of the component (34) with beveled to the opposite side Straps are provided in the slots of the tube half (10 ') are inserted and welded and the outside protrude to spacers to the adjacent rectangular tubes (10) form.
  • FIG. 6 shows an embodiment of rectangular tubes, the two in the longitudinal direction in the area of the larger Walls divided tube halves (36) are formed.
  • a metal sheet (37) is inserted into both tube halves (36) S-shaped and Z-shaped, successive sections deformed is.
  • Each parallel to the longer walls of the tube half (36) trending parts are with pairs of tabs (38) provided, which correspond to the explanations for Fig. 3a and 3b are arranged and formed.
  • the Pipe Halves (36) are by laser welding or micro TIG welding with each other connected, the inserted sheet (37) with the help a weld-through is fixed.

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

Description

Die Erfindung betrifft einen Wärmeübertrager zum Kühlen von Abgas eines Verbrennungsmotors mit einer Vielzahl von Kanälen zum Führen des Abgases, die mit schräg zur Strömungsrichtung des Abgases paarweise angeordneten, von wenigstens einer Wand der Kanäle abragenden Laschen versehen und außen mit einem flüssigen Kühlmedium umströmbar sind.The invention relates to a heat exchanger for cooling Exhaust gas from an internal combustion engine with a plurality of channels for guiding the exhaust gas, which is inclined to the flow direction of the exhaust gas arranged in pairs, from at least one wall of the channels protruding tabs and on the outside with a liquid Coolant can flow around.

Bei einem bekannten Wärmeübertrager der eingangs genannten Art sind die Kanäle aus scheibenförmigen Wärmetauschelementen gebildet, zwischen denen jeweils eine Turbulenzeinlage angeordnet ist, die die schräg zur Strömungsrichtung verlaufenden, paarweise angeordneten Laschen aufweist. Dieser aus dem DE-U 94 06 197.1 bekannte Wärmeübertrager erfüllt die an ihn gestellte Aufgabe in befriedigender Weise. Es erfordert jedoch einen erheblichen Aufwand, Wärmeübertrager unterschiedlicher Baugröße für verschiedene Fahrzeuge zu realisieren, da dann die einzelnen Elemente maßgenau in den unterschiedlichen Größen gefertigt werden müssen.In a known heat exchanger of the type mentioned The channels are made of disc-shaped heat exchange elements formed, between each of which a turbulence insert is arranged is the diagonal to the flow direction, has tabs arranged in pairs. This from the DE-U 94 06 197.1 known heat exchanger meets the requirements for him task in a satisfactory manner. However, it does require a considerable effort, different heat exchangers Realize size for different vehicles because then the individual elements in the different dimensions Sizes need to be made.

Der Erfindung liegt die Aufgabe zugrunde, einen Wärmeübertrager der eingangs genannten Art zu schaffen, der bei im wesentlichen gleichem Aufbau in unterschiedlichen Größen herstellbar ist, wobei für die einzelnen Bauelemente keine allzu hohen Maßtoleranzen eingehalten werden müssen.The invention has for its object a heat exchanger to create the type mentioned, which at essentially same structure can be manufactured in different sizes is, for the individual components none too high dimensional tolerances must be observed.

Diese Aufgabe wird dadurch gelöst, daß als Kanäle für das Abgas ein Bündel von Rechteckrohren vorgesehen ist, deren Enden in gitterförmige Rohrböden eingeschweißt sind, daß das Bündel von Rechteckrohren mit einem Blechmantel umgeben ist, der der Kontur des Bündels folgt, der mit einem Kühlmediumeintritt und mit einem Kühlmediumaustritt versehen ist und der mit den Rohrböden verschweißt ist, und daß die Enden des Blechmantels mit angeschweißten Flanschblechen versehen sind, die jeweils mittels einer zentralen Öffnung zu dem Bündel von Rechteckrohren offen sind und die mit Befestigungsmitteln zum Befestigen an Rohrstücken einer Abgasleitung versehen sind.This object is achieved in that as channels for the exhaust gas a bundle of rectangular tubes is provided, the ends of which are welded into grid-shaped tube sheets that the bundle is surrounded by rectangular tubes with a sheet metal jacket, which the Contour of the bundle follows, which enters with a cooling medium and is provided with a cooling medium outlet and with the Tube sheets is welded, and that the ends of the sheet metal jacket are provided with welded flange plates, each through a central opening to the bundle of rectangular tubes are open and with fasteners for fastening are provided on pipe sections of an exhaust pipe.

Der erfindungsgemäße Wärmeübertrager besteht im wesentlichen aus Blechbauteilen, die in einfacher Weise hergestellt werden können. Das Schweißen wird bevorzugt als Laserschweißen oder Mikro-WIG-Schweißen durchgeführt. Die gitterförmigen Rohrböden, die aus Stahlblech von etwa 1mm bis 3mm Dicke gestanzt werden, weisen entsprechend der Anzahl und Anordnung der Rechteckrohre Durchbrüche auf. Die Abstände der Rechteckrohre und damit die Stegbreite des Rohrbodens variiert je nach Massenstrom des Kühlmittels und liegt ebenfalls in der Größenordnung zwischen 1mm und 3mm. Die Außenkontur der Rohrböden ergibt sich aus der Anzahl und der Anordnung der Flachrohre. Der Blechmantel wird ebenfalls in einfacher Weise aus einem Stahlblech hergestellt, das eine den Rohrböden ähnliche Blechdicke aufweist. Der Blechmantel kann in Stufen entsprechend der Kontur der Rohrböden in einfacher Weise gekantet werden. Die mit Befestigungsmitteln versehenen Flanschbleche erlauben in einfacher Weise eine Anordnung des Wärmetauschers zwischen zwei Rohrstücken einer Abgasleitung, beispielsweise in ähnlicher Weise wie die Anordnung eines Katalysators. The heat exchanger according to the invention consists in essentially made of sheet metal components that are manufactured in a simple manner can be. Welding is preferred as laser welding or micro TIG welding. The lattice-shaped Tube sheets made of sheet steel from about 1mm to 3mm thickness are punched, according to the number and Arrangement of rectangular tubes breakthroughs. The distances of the Rectangular tubes and thus the web width of the tube sheet varies depending on the mass flow of the coolant and is also in the range between 1mm and 3mm. The outer contour the tube sheets result from the number and arrangement of the flat tubes. The sheet metal jacket also becomes easier Made of sheet steel, the one of the tube sheets has similar sheet thickness. The sheet metal jacket can be in Steps according to the contour of the tube sheets in simple Way be edged. The provided with fasteners Flange plates allow an arrangement of the Heat exchanger between two pipe sections of an exhaust pipe, for example in a manner similar to the arrangement of a catalyst.

In weiterer Ausgestaltung der Erfindung wird vorgesehen, daß die Rechteckrohre jeweils aus zwei miteinander verschweißten Rohrschalen gebildet werden. Die paarweise vorhandenen Laschen können unmittelbar an dem Rechteckrohr befestigt oder Bestandteil dieses Rechteckrohres sein. Sie können jedoch auch Bestandteil von in den Rechteckrohren angeordneten Einlagen sein.In a further embodiment of the invention it is provided that the rectangular tubes each made of two welded together Pipe shells are formed. The pair of tabs can be attached directly to the rectangular tube or Be part of this rectangular tube. However, you can also part of inserts arranged in the rectangular tubes his.

In weiterer Ausgestaltung der Erfindung wird vorgesehen, daß die Flanschbleche in einander im wesentlichen diametral gegenüberliegenden Bereichen mit Gewindehülsen versehen sind. Dadurch ist in einfacher Weise eine Verschraubung mit einem Gegenflansch eines Rohrstückes einer Abgasleitung möglich.In a further embodiment of the invention it is provided that the flange plates in diametrically opposite one another Areas are provided with threaded sleeves. This is a screw connection with a simple Counter flange of a pipe section of an exhaust pipe possible.

In vorteilhafter Ausgestaltung der Erfindung wird vorgesehen, daß der Blechmantel in der Nähe des in Strömungrichtung des Abgases vorderen Flanschbleches mit einem Kühlmediumeintritt und in der Nähe des hinteren Flanschbleches mit einem Kühlmediumaustritt versehen ist. Damit wird zunächst erreicht, daß das Kühlmedium im Gleichstrom zum Abgas durch den Wärmeübertrager geleitet wird. Damit wird erreicht, daß die Gefahr der Dampfbildung an der Eintrittsseite des Abgases verringert ist, da hier das Kühlmedium die relativ niedrigste Temperatur aufweist.In an advantageous embodiment of the invention, that the sheet metal jacket near the in the flow direction of the Exhaust front flange plate with a coolant inlet and near the rear flange plate with a coolant outlet is provided. It is first achieved that the cooling medium in direct current to the exhaust gas through the heat exchanger is directed. This ensures that the danger of Vapor formation on the inlet side of the exhaust gas is reduced is because here the cooling medium is the relatively lowest temperature having.

In weiterer Ausgestaltung der Erfindung wird vorgesehen, daß der Kühlmediumeintritt und der Kühlmediumaustritt auf gegenüberliegenden Seiten des Blechmantels angeordnet sind. Aufgrund dieser Anordnung sind die Strömungswege der einzelnen Strompfade für das Kühlmedium um die Rechteckrohre herum im wesentlichen gleich lang, so daß eine gleichmäßige Umströmung dieser Rechteckrohre gewährleistet ist.In a further embodiment of the invention it is provided that the cooling medium inlet and the cooling medium outlet on opposite Sides of the sheet metal jacket are arranged. Because of this arrangement are the flow paths of the individual Current paths for the cooling medium around the rectangular tubes in the essentially the same length, so that a uniform flow this rectangular tubes is guaranteed.

In weiterer Ausgestaltung der Erfindung wird vorgesehen, daß der Blechmantel aus zwei vorgeformten Blechschalen zusammengesetzt ist, die mittels Fügeverbindungen an die Rohrböden anschließen. Die beiden Blechschalen ergeben nach dem Verschweißen ein steifes und druckfestes Gehäuse. Das Vorsehen von Fügeverbindungen hat den Vorteil, daß die zu verschweißenden Elemente bereits vor dem Schweißen einen gewissen Zusammenhalt aufweisen, so daß der Schweißvorgang relativ einfach durchgeführt werden kann.In a further embodiment of the invention it is provided that the sheet metal jacket is composed of two preformed sheet metal shells is that by means of joint connections to the tube sheets connect. The two sheet metal shells result after welding a rigid and pressure-resistant housing. The provision of joint connections has the advantage that those to be welded Elements a certain cohesion even before welding have, so that the welding process is relatively simple can be carried out.

Zu dem gleichen Zweck wird in weiterer Ausgestaltung der Erfindung vorgesehen, daß die Flanschbleche mittels Fügeverbindungen an dem Blechmantel anschließen. Ferner wird zu dem gleichen Zweck vorgesehen, daß die Gewindehülsen mittels einer Fügeverbindung an die Flanschbleche anschließen. Damit läßt sich der Schweißvorgang relativ einfach durchführen.For the same purpose in a further embodiment of the invention provided that the flange plates by means of joint connections connect to the sheet metal jacket. Furthermore, same purpose provided that the threaded sleeves by means of a Connect the joint to the flange plates. In order to the welding process can be carried out relatively easily.

Weitere Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung der in der Zeichnung dargestellten Ausführungsformen.

Fig. 1
zeigt eine Außenansicht eines erfindungsgemäßen Wärmeübertragers,
Fig. 2
eine Ansicht auf den Wärmeübertrager der Fig. 1 in axialer Richtung,
Fig. 3a bis Fig. 6
verschiedene Lösungen zum Anbringen von paarweise angeordneten Laschen im Inneren von Rechteckrohren,
Fig. 7
eine Axialansicht auf einen gitterförmigen Rohrboden mit nur angedeutetem Blechmantel, und
Fig. 8
einen axialen Schnitt durch eine Gewindehülse und ein Anschlußrohr für einen Kühlmediumeintritt oder einen Kühlmediumaustritt.
Further advantages of the invention result from the following description of the embodiments shown in the drawing.
Fig. 1
shows an external view of a heat exchanger according to the invention,
Fig. 2
2 shows a view of the heat exchanger of FIG. 1 in the axial direction,
3a to 6
different solutions for attaching brackets arranged in pairs inside rectangular tubes,
Fig. 7
an axial view of a grid-shaped tube sheet with only indicated sheet metal jacket, and
Fig. 8
an axial section through a threaded sleeve and a connecting pipe for a cooling medium inlet or a cooling medium outlet.

Der in Figur 1 und 2 dargestellte Wärmeübertrager besitzt ein Bündel von Flachrohren (10), die eine Wandstärke in der Gegend von 0,3mm bis 0,4mm aufweisen. Die Enden der Rechteckrohre (10) sind in gitterförmige Rohrböden (11) eingesteckt und mit diesen verschweißt. Ein derartiger Rohrboden (11), der zur Aufnahme von 16 Rechteckrohren dient, ist beispielsweise in Fig. 7 dargestellt. Diese Rohrböden (11) sind aus einem Stahlblech gestanzt, das eine Blechdicke in der Größenordnung von 1mm bis 3mm aufweist. Die Stege zwischen den Durchbrüchen, die zur Aufnahme der Flachrohre dienen, besitzen eine Breite, die etwa der Wanddicke der Rechteckrohre (10) entspricht. Die Anordnung der Durchbrüche und damit der Stege der Rohrböden (11) ist so gewählt, daß in grober Annäherung ein kreisförmiger oder ovaler Querschnitt entsteht. Auch die die außenliegenden Rechteckrohre umfassenden Stege besitzen die gleiche Stegbreite, so daß die Außenkontur der Rohrböden der Kontur des Rohrbündels - vergrößert um die Stegbreite - entspricht.The heat exchanger shown in Figures 1 and 2 has one Bundle of flat tubes (10) that have a wall thickness in the area have from 0.3mm to 0.4mm. The ends of the rectangular tubes (10) are inserted into grid-shaped tube sheets (11) and welded to them. Such a tube sheet (11), which is used to hold 16 rectangular tubes, for example shown in Fig. 7. These tube sheets (11) are made punched a steel sheet that is a sheet thickness of the order of magnitude from 1mm to 3mm. The bridges between the Have breakthroughs that serve to accommodate the flat tubes a width that is approximately the wall thickness of the rectangular tubes (10) corresponds. The arrangement of the breakthroughs and thus the The webs of the tube sheets (11) are selected so that they are roughly approximated a circular or oval cross section is created. Also the webs surrounding the external rectangular tubes have the same web width, so that the outer contour of the Tube sheets of the contour of the tube bundle - enlarged by the Bridge width - corresponds.

Die Rohrböden (11) sind in die Enden eines Blechmantels (12) eingeschweißt, der auch in Fig. 7 gestrichelt angedeutet ist. Der Blechmantel (12) besteht aus zwei Halbschalen aus Stahlblech, das eine im wesentlichen der Dicke der Rohrböden (11) entsprechende Dicke aufweist. Die Halbschalen sind entsprechend der Außenkontur der Rohrböden (11) geformt, beispielsweise gekantet oder mittels eines Hochdruckumformverfahrens. Die beiden Halbschalen des Blechmantels (12) sind mittels Längsschweißnähten (13) miteinander verbunden. Wie aus Fig. 7 zu ersehen ist, sind die Rohrböden (11) mit insgesamt vier etwas verbreiterten Ansätzen (14) versehen, denen entsprechende Aussparungen am Ende der beiden Halbschalen des Blechmantels (12) zugeordnet sind, so daß hiermit eine Fügeverbindung geschaffen ist.The tube sheets (11) are in the ends of a sheet metal jacket (12) welded, which is also indicated by dashed lines in Fig. 7. The sheet metal jacket (12) consists of two half-shells made of sheet steel, the one essentially the thickness of the tube sheets (11) has the appropriate thickness. The half shells are corresponding the outer contour of the tube sheets (11) shaped, for example folded or using a high pressure forming process. The two half-shells of the sheet metal jacket (12) are Longitudinal weld seams (13) joined together. As from Fig. 7 can be seen, the tube sheets (11) with a total of four somewhat widened approaches (14) provided the corresponding Cutouts at the end of the two half-shells of the sheet metal jacket (12) are assigned, so that hereby a joint connection is created.

An den beiden Enden des Blechmantels (12) sind Flanschbleche (15) angeschweißt, die ebenfalls aus Blech gestanzt sind und die eine Blechdicke ähnlich der Blechdicke der Rohrböden (11) aufweisen. Die Flanschbleche (15) stehen in zwei diametral gegenüberliegenden Bereichen seitlich über die Kontur des Blechmantels über. In diesem Bereich ist der Blechmantel (12) in axialer Richtung über die Rohrböden (11) hinaus verlängert und mit diesen verlängerten Ansätzen in schlitzförmige Aussparungen (17) der Flanschbleche (15) eingesteckt. In diesem Bereich erfolgt eine Verschweißung von der Außenseite der Flanschbleche (15) her, während im übrigen Bereich eine Verschweißung von der anderen Seite her vorgesehen ist.At the two ends of the sheet metal jacket (12) are flange sheets (15) welded, which are also stamped from sheet metal and which is a sheet thickness similar to the sheet thickness of the tube sheets (11) exhibit. The flange plates (15) are diametrically divided opposite areas laterally over the contour of the Sheet metal over. In this area the sheet metal jacket (12) extended in the axial direction beyond the tube sheets (11) and with these extended approaches into slit-shaped recesses (17) of the flange plates (15) are inserted. In this A weld is made from the outside of the area Flange plates (15) ago, while in the remaining area a weld is provided from the other side.

Wie insbesondere aus Figur 2 zu ersehen ist, besitzen die Flanschbleche (15) eine mittlere, vorzugsweise kreisförmige Aussparung (18), deren Abmessung den vorausgehenden und nachfolgenden, nicht dargestellten Rohrstücken einer Abgasanlage oder Auspuffanlage eines Fahrzeuges entspricht.As can be seen in particular from FIG. 2, the Flange plates (15) a medium, preferably circular Recess (18), the dimensions of which precede and follow, Pipe pieces, not shown, of an exhaust system or exhaust system of a vehicle.

In den diametral gegenüberliegenden, nach außen über den Blechmantel (12) überstehenden Bereichen sind die Flanschbleche (15) mit Gewindehülsen (19, 20) versehen. Die Gewindehülsen (19) sind mit einem auf ihrer offenen Seite befindlichen Ringbund in Bohrungen der Flanschbleche (15) eingesteckt und von der jeweiligen Außenseite der Flanschbleche (15) aus mit diesen verschweißt. Im Bereich ihrer geschlossenen Seite besitzen die Gewindehülsen (19) einen Ringbund, mit dem sie in einen Haltesteg (21) eingesteckt sind. Dieser Haltesteg (21) ist mit den Gewindehülsen (19) und dem Blechmantel (12) verschweißt.In the diametrically opposite, outwards over the Areas that protrude from the sheet metal jacket (12) are the flange sheets (15) with threaded sleeves (19, 20). The threaded sleeves (19) are with one on their open side Ring collar inserted into the holes in the flange plates (15) and from the respective outside of the flange plates (15) welded this. Own in the area of their closed side the threaded sleeves (19) an annular collar with which they in a retaining web (21) are inserted. This footbridge (21) is welded to the threaded sleeves (19) and the sheet metal jacket (12).

Die in Fig. 8 dargestellten Gewindehülsen (20), die auf ihrer offenen, den Flanschblechen (15) zugeordneten Seite mit einem Ringbund (22) versehen sind, sind auch auf ihrer geschlossenen Seite mit einem Ringbund (23) versehen, mit welchem sie jeweils in ein Anschlußrohr (24) eingesteckt sind. Das Anschlußrohr (24) und die Gewindehülse (20) sind jeweils mit einer Schweißnaht (25) miteinander verschweißt. Die Außenseite der Schweißnaht (25) wird abgeschliffen. Danach wird in das Anschlußrohr (24) eine seitliche Aussparung (26) eingefräst. Die Gewindehülsen (20) werden mit ihrem Ringbund (23) in Aussparungen der Flanschbleche (15) eingeschweißt und mit den Flanschblechen (15) verschweißt. Die Anschlußrohre (24) sind zusätzlich mittels Haltestegen (27) an dem Blechmantel angeschweißt. Die jeweiligen Außenkanten der Haltestege (27) verlaufen tangential zu dem Anschlußrohr (24) zu einer ebenen Fläche des Blechmantels. Sie werden von angeschweißten Abdeckblechen (28) abgedeckt, die an dem Blechmantel (12), den Haltestegen (27), dem Anschlußrohr (24), den Gewindehülsen (20) und dem Flanschblech (15) angeschweißt sind. Damit wird im Bereich der Aussparungen (26) zwischen den Haltestegen (27) und den Flanschblechen (15) eine Art Wasserkasten gebildet, in dessen Bereich der Blechmantel mit einer Eintrittsöffnung versehen ist.The threaded sleeves (20) shown in Fig. 8, on their open side assigned to the flange plates (15) with a Ring collar (22) are also provided on their closed Side with a ring collar (23) with which they are each inserted into a connecting pipe (24). The connecting pipe (24) and the threaded sleeve (20) are each with a weld seam (25) welded together. The outside the weld seam (25) is ground off. After that, in the connecting pipe (24) milled into a lateral recess (26). The threaded sleeves (20) are with their ring collar (23) welded into recesses in the flange plates (15) and with welded the flange plates (15). The connecting pipes (24) are additionally attached to the sheet metal jacket by means of retaining webs (27) welded on. The respective outer edges of the holding webs (27) extend tangentially to the connecting pipe (24) to a plane Surface of the sheet metal jacket. They are made of welded cover plates (28) covered on the sheet metal jacket (12), the Retaining webs (27), the connecting tube (24), the threaded sleeves (20) and the flange plate (15) are welded. So that will in the area of the recesses (26) between the holding webs (27) and the flange plates (15) form a kind of water tank, in its area the sheet metal jacket with an entry opening is provided.

Wie aus Fig. 1 zu ersehen ist, liegen die Anschlußrohre (24) und die damit verbundenen Wasserkästen auf einander gegenüberliegenden Seiten des Blechmantels, so daß ein etwa Z-förmiger Strömungspfad für das mit den Pfeilen (29) angedeutete Kühlmedium geschaffen wird. Dieser Strömungspfad hat im Bereich aller Rechteckrohre (10) annähernd den gleichen Strömungsweg, so daß sich eine sehr gute und gleichmäßige Umströmung der Rechteckrohre (10) ergibt. Wie aus Fig. 1 weiter zu ersehen ist, ist der Kühlmitteleintritt (in Fig. 1 oben) auf der Seite angeordnet, auf der auch der Eintritt des mit dem Pfeil (30) angedeuteten Abgases liegt, während der Kühlmittelaustritt auf der mit dem Pfeil (31) angedeuteten Austrittsseite des Abgases liegt. Das Kühlmedium und das Abgas strömen somit im Gleichstrom innerhalb des Wärmeübertragers.As can be seen from Fig. 1, the connecting pipes (24) and the associated water boxes on opposite one another Sides of the sheet metal jacket, so that an approximately Z-shaped Flow path for that indicated by the arrows (29) Coolant is created. This flow path has in Area of all rectangular tubes (10) approximately the same flow path, so that there is a very good and even flow the rectangular tubes (10) results. As from Fig. 1 further is seen, the coolant inlet (in Fig. 1 above) the side on which the entry of the with the Arrow (30) indicated exhaust gas is during the coolant outlet on the exit side indicated by the arrow (31) of the exhaust gas. The cooling medium and the exhaust gas thus flow in direct current within the heat exchanger.

Wie in Fig. 1 zu ersehen ist und wie in Fig. 3 bis 6 näher erläutert werden wird, sind die Rechteckrohre mit paarweise angeordneten, nach innen jeweils von gegenüberliegenden Wänden abragenden Laschen (32) versehen, die schräg zur Strömungsrichtung des Abgases derart angeordnet sind, daß sie von einer engsten Stelle unter einem Winkel von etwa 40° auseinanderlaufen. Die Rechteckrohre werden jeweils aus zwei Rohrschalen (10') zusammengeschweißt, die an jeweils ihren Schmalseiten miteinander verschweißt sind. Die Rohrschalen haben eine Blechstärke von etwa 0,3mm bis 0,4mm. Die Laschen (32) haben annähernd die gleiche Stärke und eine Länge von etwa dem Zehnfachen ihrer Blechstärke. Sie laufen von einer engsten Stelle, an der sie einen Abstand von etwa 1,2mm haben, unter einem Winkel von 40° auseinander. Die Höhe der Laschen (32) beträgt etwa ein Viertel bis ein Drittel der Gesamthöhe der Flachrohre. Bei dem Ausführungsbeispiel nach Fig. 3a, 3b sind die Rohrhälften (10') mit Schlitzen versehen, in welche die Laschen (32) eingesteckt und danach mit den Rohrhälften (10') verschweißt sind. Um das Dichtschweißen zu vermeiden, können die Laschen (32) auf ihrer den Rohrhälften (10') zugewandten Seite mit einer oder mehreren Erhöhungen versehen sein, so daß sie mit der bekannten Bolzenschweißtechnik an die Rohrhälften (10') angeschweißt sind, so daß das Dichtschweißen entfällt.As can be seen in Fig. 1 and as in Fig. 3 to 6 in more detail will be explained, the rectangular tubes are in pairs arranged, facing each other from opposite walls protruding tabs (32) provided obliquely to the direction of flow of the exhaust gas are arranged so that they of diverge at a narrow point at an angle of about 40 °. The rectangular tubes each consist of two tube shells (10 ') welded together, each on their Narrow sides are welded together. The pipe shells have a sheet thickness of about 0.3mm to 0.4mm. The tabs (32) have approximately the same strength and a length of about ten times their sheet thickness. You run from one narrowest point where they are about 1.2mm apart, apart at an angle of 40 °. The height of the tabs (32) is about a quarter to a third of the total amount of the flat tubes. In the embodiment according to 3a, 3b, the tube halves (10 ') are provided with slots, into which the tabs (32) are inserted and then with the pipe halves (10 ') are welded. To seal welding to avoid, the tabs (32) on their the tube halves (10 ') facing side with one or more ridges be provided so that they with the known stud welding technology are welded to the tube halves (10 '), so that the sealing welding is omitted.

Bei dem dargestellten Ausführungsbeispiel nach Fig. 3a, 3b sind die Laschen (32) der beiden Rohrhälften einander gegenüberliegend angeordnet. Bei einer abgewandelten Ausführungsform wird vorgesehen, daß die Laschen (32) der beiden Rohrhälften (10') außermittig derart angeordnet sind, daß die Laschen (32) der oberen Rohrhälfte und der unteren Rohrhälfte (10') in Querrichtung zueinander versetzt sind. Der Abstand der Laschen (32) in Strömungsrichtung des Abgases beträgt etwa 30mm.In the illustrated embodiment according to Fig. 3a, 3b the tabs (32) of the two tube halves are opposite one another arranged. In a modified embodiment it is provided that the tabs (32) of the two tube halves (10 ') are arranged off-center such that the tabs (32) the upper tube and the lower tube (10 ') are offset to one another in the transverse direction. The distance the tabs (32) in the flow direction of the exhaust gas is approximately 30mm.

Bei dem Ausführungsbeispiel nach Fig. 4a und 4b wird vorgesehen, daß die Laschen (32') durch Tiefziehen und Zusammendrükken jeweils aus der Rohrhälfte (10') herausgeformt sind. Damit entfällt ein Schweißvorgang, insbesondere auch ein Dichtschweißen im Bereich der Laschen (32'). In Fig. 4a ist weiter dargestellt, daß die Rohrhälfte (10') mit einer nach außen gerichteten knopfartigen Ausprägung (33) versehen ist. Diese Ausprägungen (33), die jeweils in Strömungsrichtung zwischen den aufeinanderfolgenden Paaren von Laschen (32') angeordnet sind, dienen als Abstandshalter oder Abstandmittel zu jeweils dem benachbarten Rechteckrohr. Eine derartige Anordnung von Abstandshaltern hat insbesondere bei längeren Wärmeübertragern Vorteile.4a and 4b it is provided that that the tabs (32 ') by deep drawing and squeezing are each formed from the tube half (10 '). In order to there is no welding process, especially sealing welding in the area of the tabs (32 '). 4a is further shown that the tube half (10 ') with an outside directed button-like expression (33) is provided. This Expressions (33), each in the flow direction between the successive pairs of tabs (32 ') arranged are used as spacers or spacers to each the neighboring rectangular tube. Such an arrangement of Spacers especially with longer heat exchangers Benefits.

In Fig. 5a ist ein Bauelement dargestellt, das ein gekantetes Blechteil (34) ist, das Paare von Laschen (35) bildet. Dieses Bauteil (34) kann im Bereich des die Laschen (35) verbindenden Steges mittels Punktschweißen an den Rohrhälften (10') befestigt werden. Dadurch entfällt ebenfalls ein Dichtschweißen. Bei einer abgewandelten Ausführungsform ähnlich Fig. 5a und 5b wird vorgesehen, daß der die Laschen (35) verbindende Steg des Bauteils (34) mit zur gegenüberliegende Seite abgekanteten Laschen versehen ist, die in Schlitze der Rohrhälfte (10') eingesteckt und eingeschweißt werden und die nach außen abragen, um Abstandshalter zu den benachbarten Rechteckrohren (10) zu bilden.In Fig. 5a, a component is shown which is a folded Sheet metal part (34), which forms pairs of tabs (35). This Component (34) can be in the area of the tabs (35) connecting Webs by means of spot welding on the tube halves (10 ') be attached. This also eliminates sealing welding. In a modified embodiment similar to Fig. 5a and 5b it is provided that the one connecting the tabs (35) Web of the component (34) with beveled to the opposite side Straps are provided in the slots of the tube half (10 ') are inserted and welded and the outside protrude to spacers to the adjacent rectangular tubes (10) form.

In Fig. 6 ist ein Ausführungsbeispiel von Rechteckrohren dargestellt, die aus zwei in Längsrichtung im Bereich der größeren Wände geteilten Rohrhälften (36) gebildet sind. In die beiden Rohrhälften (36) wird ein Blech (37) einlegt, das in S- und Z-förmige, aufeinanderfolgende Abschnitte verformt ist. Die jeweils parallel zu den längeren Wänden der Rohrhälfte (36) verlaufenden Teile sind mit Paaren von Laschen (38) versehen, die entsprechend den Erläuterungen zu Fig. 3a und 3b angeordnet und ausgebildet sind. Die Rohrhälften (36) werden durch Laserschweißung oder Mikro-WIG-Schweißung miteinander verbunden, wobei das eingelegte Blech (37) mit Hilfe einer Durchschweißung fixiert wird.6 shows an embodiment of rectangular tubes, the two in the longitudinal direction in the area of the larger Walls divided tube halves (36) are formed. In the a metal sheet (37) is inserted into both tube halves (36) S-shaped and Z-shaped, successive sections deformed is. Each parallel to the longer walls of the tube half (36) trending parts are with pairs of tabs (38) provided, which correspond to the explanations for Fig. 3a and 3b are arranged and formed. The Pipe Halves (36) are by laser welding or micro TIG welding with each other connected, the inserted sheet (37) with the help a weld-through is fixed.

Bei der Herstellung des erläuterten Wärmeübertragers werden zunächst die Rohrhälften (10') mit den Laschen (32, 32', 35 oder 38) versehen und dann zusammengeschweißt. Die so gebildeten Rechteckrohre werden mit den gitterförmig ausgestanzten Rohrböden (11) versehen, wonach die Enden der Rechteckrohre (10) mit den Rohrböden verschweißt werden. Anschließend werden die zwei profilierten Blechschalen des Blechmantels (12), die mit vorbereiteten Eintrittsöffnungen und Austrittsöffnungen für das Kühlmedium versehen sind, an die Rohrböden (11) angesetzt und mit diesen verschweißt. Danach werden die Flanschbleche (15) angebracht und mit dem Blechmantel (12) verschweißt. Anschließend werden die vorbereiteten Gewindehülsen (19, 20) an die Flanschbleche angesteckt und mit diesen verschweißt sowie mittels der Haltestege (21, 27) mit dem Blechmantel (12) verschweißt. Anschließend werden noch die Abdeckbleche (28) angebracht, die so mit den Haltestegen (27), dem Blechmantel (12), den Anschlußrohren (24), den Gewindehülsen (20) und den Flanschblechen (15) verschweißt werden, daß eine Art von Wasserkasten gebildet wird.In the manufacture of the heat exchanger explained first the tube halves (10 ') with the tabs (32, 32', 35 or 38) and then welded together. The so educated Rectangular tubes are punched out with the grid Provide tube sheets (11), after which the ends of the rectangular tubes (10) welded to the tube sheets. Then be the two profiled sheet metal shells of the sheet metal jacket (12), those with prepared inlet openings and outlet openings for the cooling medium are attached to the tube sheets (11) attached and welded to them. After that, the Flanged sheets (15) attached and with the sheet metal jacket (12) welded. Then the prepared threaded sleeves (19, 20) attached to the flange plates and with them welded and by means of the holding webs (21, 27) with the Welded sheet metal jacket (12). Then the Cover plates (28) attached, so with the retaining bars (27), the sheet metal jacket (12), the connecting pipes (24), the threaded sleeves (20) and the flange plates (15) are welded, that a kind of water box is formed.

Claims (16)

  1. Heat-exchanger for cooling the exhaust gas of a combustion engine, having a multiplicity of channels (10) for carrying the exhaust gas, which are provided with baffles (32, 32', 35) arranged obliquely relative to the flow direction of the exhaust gas in pairs projecting from at least one wall of the channels and around which a liquid coolant can flow on the outside,
    characterised in that
    as channels for the exhaust gas a bundle of rectangular tubes (10) are provided, whose ends are welded into lattice-shaped tube bases (11), the bundle of rectangular tubes is surrounded by a sheet casing (12) which follows the contour of the bundle, the said casing is provided with a coolant medium inlet and a coolant medium outlet and is welded to the tube bases, and the ends of the sheet casing (12) are provided with welded-on flange sheets (15) each of which opens via a central opening (18) into the bundle of rectangular tubes (10) and which are provided with fastening means (19, 20) for attachment to the tube sections of an exhaust line.
  2. Heat-exchanger according to Claim 1,
    characterised in that
    the rectangular tubes (10) are each formed from two tube halves (10') welded together.
  3. Heat-exchanger according to Claim 2,
    characterised in that
    at least one of the tube halves is provided with the baffles (32, 32', 35).
  4. Heat-exchanger according to Claim 3,
    characterised in that
    the baffles (32, 35) are welded to the tube halves (10').
  5. Heat-exchanger according to Claim 3,
    characterised in that
    the baffles (32') are formed from the material of the tube halves (10') by deep drawing and pressing.
  6. Heat-exchanger according to Claims 1 or 2,
    characterised in that
    the baffles (38) are part of inserts (37) arranged inside the rectangular tubes (10).
  7. Heat-exchanger according to any of Claims 1 to 6,
    characterised in that
    the rectangular tubes (10) are each provided with separator elements facing the adjacent rectangular tubes.
  8. Heat-exchanger according to any of Claims 1 to 7,
    characterised in that
    the flange sheets (15) are provided with threaded sleeves (19, 20) in essentially diametrically opposed positions relative to one another.
  9. Heat-exchanger according to any of Claims 1 to 8,
    characterised in that
    the sheet casing (12) is provided near the front flange sheet in the exhaust gas flow direction with the coolant medium inlet, and near the rear flange sheet with the coolant medium outlet.
  10. Heat-exchanger according to Claim 9,
    characterised in that
    the coolant medium inlet and the coolant medium outlet are arranged on opposite sides of the sheet casing (12).
  11. Heat-exchanger according to Claims 9 or 10,
    characterised in that
    the coolant medium inlet and outlet each comprise a connection tube (24), these tubes being directed parallel to the rectangular tubes (10) and in each case being connected via a lateral opening (26) to an opening in the sheet casing (12).
  12. Heat-exchanger according to Claim 11,
    characterised in that
    between the flange sheet (15), the holding webs (27) welded onto the sheet casing in the area of the opening (26) of the connection tube (24) and the sheet casing (12), a kind of water-box is formed in each case.
  13. Heat-exchanger according to Claim 12,
    characterised in that
    the connection tubes (24) are each positioned in extensions of respective threaded sleeves (20) closed at their back end, and in each case the water-box is formed between the threaded sleeve and the connection tube by cover-sheets (28) that extend from the flange sheets (15) to the holding webs (27).
  14. Heat-exchanger according to any of Claims 1 to 13,
    characterised in that
    the sheet casing (12) is assembled from two pre-formed sheet shells connected to the tube bases (11) by mechanical joints.
  15. Heat-exchanger according to any of Claims 1 to 14,
    characterised in that
    the flange sheets (15) are connected to the sheet casing (12) by mechanical joints.
  16. Heat-exchanger according to Claims 8 to 15,
    characterised in that
    the threaded sleeves (19, 20) are connected to the flange sheets (15) by a mechanical joint.
EP96115729A 1995-11-01 1996-10-01 Heat exchanger for cooling exhaust gas Expired - Lifetime EP0772018B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19540683A DE19540683A1 (en) 1995-11-01 1995-11-01 Heat exchanger for cooling exhaust gas
DE19540683 1995-11-01

Publications (3)

Publication Number Publication Date
EP0772018A2 EP0772018A2 (en) 1997-05-07
EP0772018A3 EP0772018A3 (en) 1998-07-29
EP0772018B1 true EP0772018B1 (en) 2001-02-28

Family

ID=7776346

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96115729A Expired - Lifetime EP0772018B1 (en) 1995-11-01 1996-10-01 Heat exchanger for cooling exhaust gas

Country Status (6)

Country Link
US (2) US6944947B1 (en)
EP (1) EP0772018B1 (en)
JP (1) JP3429143B2 (en)
BR (1) BR9605398A (en)
DE (2) DE19540683A1 (en)
ES (1) ES2154375T3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7055586B2 (en) 2001-05-25 2006-06-06 Maruyasu Industries Co., Ltd. Multitubular heat exchanger
US7240723B2 (en) 2003-09-30 2007-07-10 Dana Canada Corporation Tube bundle heat exchanger comprising tubes with expanded sections

Families Citing this family (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19654363B4 (en) * 1996-12-24 2007-09-27 Behr Gmbh & Co. Kg Exhaust gas heat exchanger for an internal combustion engine
DE19654367A1 (en) 1996-12-24 1998-06-25 Behr Gmbh & Co Method for attaching tabs and / or protrusions to a sheet and sheet with tabs and / or devices and rectangular tube made of sheet
DE19654368B4 (en) 1996-12-24 2006-01-05 Behr Gmbh & Co. Kg Heat exchanger, in particular exhaust gas heat exchanger
DE19654364B4 (en) * 1996-12-24 2007-05-16 Behr Gmbh & Co Kg Flow channel, in particular for a gas-liquid heat exchanger
DE19654366B4 (en) * 1996-12-24 2005-10-20 Behr Gmbh & Co Kg Flow channel, in particular for an exhaust gas heat exchanger
JP4130512B2 (en) 1998-04-24 2008-08-06 ベール ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー Heat exchanger
DE19907163C2 (en) * 1998-04-24 2003-08-14 Behr Gmbh & Co Heat exchanger, in particular exhaust gas heat exchanger
DE19955939A1 (en) 1999-11-20 2001-05-23 Volkswagen Ag Heat exchanger for cooling exhaust gases has heat exchanger pipe provided with at least one projection on its inside formed by indenting pipe wall inwards
DE19962863B4 (en) * 1999-12-24 2013-09-19 Behr Gmbh & Co. Kg Heat exchanger
DE10127084B4 (en) * 2000-06-17 2019-05-29 Mahle International Gmbh Heat exchanger, in particular for motor vehicles
DE10162198A1 (en) 2000-12-19 2002-08-08 Denso Corp heat exchangers
US7077190B2 (en) 2001-07-10 2006-07-18 Denso Corporation Exhaust gas heat exchanger
KR100932677B1 (en) * 2001-08-10 2009-12-22 요코하마 티엘오 가부시키가이샤 Heat transfer device
DE10144827A1 (en) * 2001-09-12 2003-03-27 Behr Gmbh & Co Exhaust gas heat exchanger
ITMI20030363A1 (en) * 2003-02-28 2004-09-01 Lorenzo Bormioli REMOTE CONTROL DEVICE FOR THE QUICK COUPLING AND RELEASING OF A PIPE FITTING TO A FLANGED PIPE.
DE10311716A1 (en) 2003-03-17 2004-10-14 Evotec Oai Ag Method and device for separating particles in a liquid flow
DE10328638A1 (en) 2003-06-26 2005-01-20 Modine Manufacturing Co., Racine Heat exchanger in caseless plate design
US7481040B2 (en) 2003-09-18 2009-01-27 Behr Gmbh & Co. Kg Exhaust-gas heat exchanger, in particular exhaust-gas cooler for exhaust gas recirculation in motor vehicles
JP2007510122A (en) * 2003-10-28 2007-04-19 ベール ゲーエムベーハー ウント コー カーゲー Heat exchanger flow passage and heat exchanger having such a flow passage
JP4614266B2 (en) * 2004-07-23 2011-01-19 臼井国際産業株式会社 Fins for fluid agitation, and heat transfer tubes and heat exchangers or heat exchange type gas cooling devices equipped with the fins
DE102005014385A1 (en) * 2005-03-24 2006-09-28 Emitec Gesellschaft Für Emissionstechnologie Mbh Exhaust gas heat exchanger, in particular exhaust gas cooler for exhaust gas recirculation in motor vehicles
WO2006100072A1 (en) 2005-03-24 2006-09-28 Behr Gmbh & Co. Kg Exhaust gas heat exchanger, in particular an exhaust gas cooler for exhaust gas recirculation in a motor vehicle
DE102005029321A1 (en) 2005-06-24 2006-12-28 Behr Gmbh & Co. Kg Heat exchanger for exhaust gas cooling has structural elements arranged so that duct has internal variable heat transfer increasing in direction of flow
US7559197B2 (en) 2005-08-31 2009-07-14 Caterpillar Inc. Combiner valve control system and method
CN101398274B (en) * 2007-09-29 2012-07-25 卡特彼勒公司 Heat exchanger tube assembly welded by laser
US8177932B2 (en) * 2009-02-27 2012-05-15 International Mezzo Technologies, Inc. Method for manufacturing a micro tube heat exchanger
IT1399246B1 (en) 2009-11-03 2013-04-11 Advanced Res Consulting S R L TUBULAR HEAT EXCHANGER, IN PARTICULAR RECEIVER TUBE FOR A SOLAR CONCENTRATION SYSTEM.
CA2964399A1 (en) * 2016-04-12 2017-10-12 Ecodrain Inc. Heat exchange conduit and heat exchanger
DE112019006640T5 (en) * 2019-01-10 2021-10-07 Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. MOTOR AND INVERTER INTEGRATED ROTATING ELECTRIC MACHINE
US11566855B2 (en) * 2019-08-09 2023-01-31 Mikutay Corporation Tube and chamber heat exchange apparatus having a medium directing assembly with enhanced medium directing panels
FR3105649B1 (en) * 2019-12-19 2021-11-26 Valeo Equip Electr Moteur Cooled rotating electric machine
US11639828B2 (en) * 2020-06-25 2023-05-02 Turbine Aeronautics IP Pty Ltd Heat exchanger
US20220242253A1 (en) * 2021-02-02 2022-08-04 Toyota Jidosha Kabushiki Kaisha Electric vehicle

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE269073C (en)
US709416A (en) * 1901-03-28 1902-09-16 Daimler Mfg Company Cooling and condensing apparatus.
FR6582E (en) * 1906-03-31 1907-01-07 Emile Chopy Automotive Radiator Tubes
US1182271A (en) * 1914-09-19 1916-05-09 Harvey E Hersh Process of making radiators.
US2488615A (en) * 1942-11-11 1949-11-22 Modine Mfg Co Oil cooler tube
US2941787A (en) * 1956-04-13 1960-06-21 Pedar Ltd Apparatus for heat exchange
DE2102744A1 (en) * 1971-01-21 1972-08-03 Fritz Voltz Sohn Heat exchanger - with flattened oval heat transfer tubes
US3757855A (en) * 1971-10-15 1973-09-11 Union Carbide Corp Primary surface heat exchanger
US4262659A (en) * 1980-01-24 1981-04-21 Valley Industries, Inc. Solar radiation absorbing panel
ZA818455B (en) * 1980-12-09 1982-10-27 Racecourse Co Operative Ass Lt Heat exchanger and apparatus including same
US4546825A (en) * 1983-01-28 1985-10-15 Mccord Heat Transfer Corporation Heat exchanger and method of assembly thereof
FR2575279B1 (en) * 1984-12-21 1989-07-07 Barriquand PLATE HEAT EXCHANGER
US4681155A (en) * 1986-05-01 1987-07-21 The Garrett Corporation Lightweight, compact heat exchanger
DE3636762C1 (en) * 1986-10-29 1988-03-03 Mtu Muenchen Gmbh Heat exchanger
DD269073A3 (en) * 1987-04-23 1989-06-21 Energie & Transportforsch Inst SWIVEL PLATE FOR HEAT TRANSFER
GB8823229D0 (en) * 1988-10-04 1988-11-09 Pyroban Ltd Heat exchanger
US4971137A (en) * 1989-11-09 1990-11-20 American Energy Exchange, Inc. Air-to-air heat exchanger with frost preventing means
DE4035896C1 (en) * 1990-11-12 1992-01-30 Hampel, Heinrich, Dr., Moresnet, Be Cooling box for blast furnace - comprising base and cover plates with side walls, and spacers to form long cooling channel
US5038754A (en) * 1991-01-28 1991-08-13 Scala Neal S Fireplace heat exchanger
DE4141556C2 (en) * 1991-12-17 2003-01-30 Behr Gmbh & Co Heat exchanger for an exhaust system of a motor vehicle
US5251693A (en) * 1992-10-19 1993-10-12 Zifferer Lothar R Tube-in-shell heat exchanger with linearly corrugated tubing
DE9406197U1 (en) * 1994-04-14 1994-06-16 Behr Gmbh & Co Heat exchanger for cooling exhaust gas from a motor vehicle engine
DE19654368B4 (en) * 1996-12-24 2006-01-05 Behr Gmbh & Co. Kg Heat exchanger, in particular exhaust gas heat exchanger

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7055586B2 (en) 2001-05-25 2006-06-06 Maruyasu Industries Co., Ltd. Multitubular heat exchanger
US7240723B2 (en) 2003-09-30 2007-07-10 Dana Canada Corporation Tube bundle heat exchanger comprising tubes with expanded sections

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EP0772018A2 (en) 1997-05-07
DE19540683A1 (en) 1997-05-07
JPH09170891A (en) 1997-06-30
US6944947B1 (en) 2005-09-20
EP0772018A3 (en) 1998-07-29
US7246437B2 (en) 2007-07-24
BR9605398A (en) 1998-07-28
ES2154375T3 (en) 2001-04-01
DE59606495D1 (en) 2001-04-05
US20050189095A1 (en) 2005-09-01
JP3429143B2 (en) 2003-07-22

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