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EP0451507B1 - Heat-exchanger - Google Patents

Heat-exchanger Download PDF

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Publication number
EP0451507B1
EP0451507B1 EP91103474A EP91103474A EP0451507B1 EP 0451507 B1 EP0451507 B1 EP 0451507B1 EP 91103474 A EP91103474 A EP 91103474A EP 91103474 A EP91103474 A EP 91103474A EP 0451507 B1 EP0451507 B1 EP 0451507B1
Authority
EP
European Patent Office
Prior art keywords
sleeves
strip
heat
sleeve
exchanger according
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
EP91103474A
Other languages
German (de)
French (fr)
Other versions
EP0451507A1 (en
Inventor
Herbert Dr.-Ing. Damsohn
Walter Dipl.-Ing. Wolf
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 EP0451507A1 publication Critical patent/EP0451507A1/en
Application granted granted Critical
Publication of EP0451507B1 publication Critical patent/EP0451507B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02Header boxes; End plates
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02Header boxes; End plates
    • F28F9/04Arrangements for sealing elements into header boxes or end plates
    • F28F9/16Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/165Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by using additional preformed parts, e.g. sleeves, gaskets
    • F28F9/167Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by using additional preformed parts, e.g. sleeves, gaskets the parts being inserted in the heat-exchange conduits

Definitions

  • the invention relates to a heat exchanger with a plurality of tubes which are held with at least one end in assigned openings in a tube sheet, sleeves being pushed into the tube ends in the region of the tube base and pressed non-positively against the tubes and the openings in the tube sheet.
  • Heat exchangers of this type are known (DE-A-35 45 554).
  • a tube-bottom connection is provided, in which the sleeves inserted into the tube ends press the tube firmly against the opening in the tube base after they have expanded, so that a liquid-tight connection is produced. Since the sleeve is largely inside the tube, no parts of the sleeve protrude beyond the tube-bottom connection.
  • Pipe-to-floor connections of this type require the individual sleeves to be inserted into the pipe ends before they are expanded. This is relatively expensive.
  • Heat exchangers are also known (DE-C-881 199), in which tubes and tubesheets are provided to protect them against seizure by bases or weak acids.
  • the tubes are first rolled into the tube sheets previously provided with a homogeneous lead layer and caulked. Separate lead sockets are inserted at the rolling points and soldered to the lead tubes. The protruding ends are flanged and then soldered to the lead attached to the tube sheets.
  • the lead bushings must therefore be used and processed separately. Since a lead is also provided, such heat exchangers and their manufacture are also complex.
  • the invention has for its object to provide a heat exchanger of the type mentioned in such a way that the insertion of the sleeves is considerably simplified, so that the manufacture of the heat exchanger is also easier.
  • a heat exchanger of the type mentioned that at least part of the Sleeves is arranged on a common sleeve base and each adapted to the position of the openings and the tubes in the tube sheet.
  • This configuration results in an assembly part with which a plurality of sleeves can be brought to the assigned points in a single operation and inserted in a simple manner into the pipe ends.
  • the manufacture of heat exchangers with inserted sleeves which ensure a particularly good tightness of the pipe-floor connection, is considerably simplified.
  • the sleeves can either be pressed against the pipes and the openings in the tube sheet by widening or by axially pressing them in excess (sleeve diameter is slightly larger than the tube diameter).
  • the features of claim 2 have the advantage that a strip can be produced in a particularly simple manner, for example by deep drawing in the desired manner, and can then also be handled particularly easily during assembly.
  • the sleeves - as is known per se - be provided with a circumferential flange extending outward at one end, which facilitates the pressing of the sleeves into the pipe ends and secures the position of the sleeves.
  • these flanges are connected to one another in a common plane through the sleeve base to form the strip.
  • claims 4 and 5 have the essential advantage that despite the arrangement in a common strip-like sleeve bottom, all sleeves are largely individually held so that they can adapt to the associated pipe ends during assembly within the scope of existing tolerances .
  • this embodiment also has the advantage that material from the Flange area of the sleeve can flow to expand the sleeve, which would not be possible or not easily possible if the flange were connected all around to the bottom of the sleeve. Otherwise the bottom of the case would warp.
  • the sleeve base acts as a flow guide surface and thus causes a lower flow resistance of the heat exchanger.
  • the sleeves can be deep-drawn with the assigned strip-shaped sleeve bottom in a simple manner, as previously indicated.
  • the webs for holding the flanges can be punched out or cut. This ensures simple and economical production.
  • the sleeves and sleeve bottom can be made of a metal sheet, but also of plastic.
  • FIG. 1 and 2 schematically show a heat exchanger (1) which, in a manner known per se, has a finned tube block which consists of a plurality of tubes (2) arranged parallel to one another and of fins arranged in a lamella-like manner between these tubes and perpendicular to the tube axes (3) exists.
  • the tube ends shown in FIG. 2 are pressed tightly into a tube sheet (4) which, as shown in FIG. 1, is provided with a large number of openings (5) (see FIG. 3b) into which the tubes ( 2) pushed in with their ends and, as will be explained with reference to FIGS. 3a, 3b and 4a, 4b, are fastened by radial widening.
  • the tube sheet (4) is then provided in a known manner with a water tank (6) through which one of the heat exchange means, preferably a liquid, can be fed to the finned tube block, which in turn is perpendicular to the tube axes and across the spaces between the fins (3). can be flowed through with a second heat exchange medium, preferably air.
  • Heat exchangers of this type are used, for example, as radiators or coolers in motor vehicles.
  • sleeves (7) are inserted into the open ends of the tubes (2) and all of them sleeves inserted into the tube ends of the tubes (2) are part of a sleeve base (8) designed in the form of a strip, with which all sleeves (7) can be handled together and fed to the tube ends.
  • the sleeves (7) are attached to the sleeve bottom (8) so that their relative position to one another is matched to the arrangement of the tubes (2) or the openings (5) in the tube bottom (4).
  • the sleeves (7) can therefore be assigned to the tube sheet (4) and the tubes (2) together, or at least partially together, as will be explained later.
  • Fig. 3a and Fig. 3b show that this is initially done in such a way (Fig. 3b) that the tubes (2) each from one side in the associated and forming the opening (5), designed as passages (9) of the tube sheet (4) are inserted, the tubes (2) also being provided with the loosely pushed-on ribs (3) in a known manner.
  • the sleeve base (8) is fed to the tube sheet (4) in such a way that the sleeves (7) are inserted into the open ends of the tubes (2) with a corresponding amount of play. 14 will be explained that all sleeves (7) are provided with a way to compensate for tolerances.
  • the tube (2) is first expanded with two expanding tools so that the ribs (3) are firmly seated in it.
  • the sleeve (7) is then widened with a second tool so that it is pressed with the tube (2) outwards against the collar (9) of the tube sheet. In this way, the tube sits tightly in the tube sheet.
  • FIG. 4a and 4b show a modification of the manufacturing process insofar as here the insertion process according to FIG. 4b is carried out analogously, as is explained with reference to FIG. 3b.
  • the only difference in production is that the tube plate area with the sleeve (7) is one and the same tool, for example, is expanded with an expansion ball to the same extent as the tube (2) in the area of the ribs (3).
  • the widened inside diameter (d i ) of the sleeve (7) therefore corresponds to the widened tube diameter (d R ).
  • the manufacturing process of a heat exchanger according to the invention can be simplified by using the strip-shaped sleeve base (8), on which many sleeves are arranged accordingly. It is namely not necessary to assign the plurality of sleeves to the corresponding pipe ends either by hand or by means of likewise complex assembly devices. It is also advantageous that the sleeves (7) receive a stop area through the sleeve bottom, which prevents the sleeves from being pushed in too far or from being inserted insufficiently. All sleeves can be inserted in a very simple manner with their flange corresponding to the sleeve base (8). The flange of the sleeves (7) also serves as a stop for the ends of the tubes (2) inserted from the other side.
  • the sleeves (7) can be produced in a very simple manner, for example in a deep-drawing process, from a sheet metal strip unwound from a coil. It is also possible to manufacture the base of the sleeve with the sleeves from plastic by injection molding. This strip must then be subdivided into sleeve base pieces (8 ') according to FIG. 5, the separating cuts (10) each taking place obliquely to the longitudinal direction of the strip (8) in the embodiment of FIG. 5, at an angle which is adapted to the angle is, which results from the arrangement of the sleeves (7) in the strip (8). Dash-dotted lines indicate the connecting line (11) between the axes of two adjacent sleeves (7).
  • the separating cut (10) is made at the same angle to the longitudinal edges of the strip (8).
  • 6 shows a modification of the arrangement of the separating cuts (10) insofar as the separating cuts here (10, 10 ') take place at different angles, so that not, as in Fig. 5 each parallelepiped-shaped strip pieces (8'), but strip pieces (8 '') with mutually identical trapezoidal shape.
  • separating cuts (12 ') are also provided in step form, but here are determined by the arrangement of a recess (13) with which a sleeve from the strip-shaped sleeve bottom (8) is cut out during the separating cut .
  • Such strip shapes (80 '') can be used to manufacture the heat exchanger as needed.
  • 10 and 11 show different separating cuts (14 and 15), which also allow a different strip shape (81 and 81 ') with the same design of the sleeve bottom strip (8). It would also be possible to make the separating cuts in a rounded shape instead of a stepped shape.
  • 12a and 12b are intended to make the meaning and purpose of this different separating cut arrangement clear.
  • 12a and 12b show dash-dotted lines the contour of the water tank (6), the inner wall (6a and 6a ') of which should surround the outermost pipe pairs as closely as possible.
  • the on the left side (Fig. 12a) above the tube sheet (4) arranged sleeve bottom strip part (80 ') - which can be made according to Fig. 7 or also according to Fig. 8 - fits the left edge (6a) of the Water box well on and runs, which is not shown in detail, to the right edge of the water box (6). Its length therefore corresponds to the length of the tube sheet and the water tank.
  • Fig. 12a shows dash-dotted lines the contour of the water tank (6), the inner wall (6a and 6a ') of which should surround the outermost pipe pairs as closely as possible.
  • the sleeve bottom strip (8 ') is separated so that a tube-free separation space can remain in the middle of the water tank, which, for example, which will be explained later, can be used to arrange a partition between two tube bundles.
  • the used on the right half (Fig. 12b), for example, according to Fig. 5 manufactured sleeve bottom strip part (8 ') extends in the example with its lower right edge (16) into the area of the wall (6a') of the water tank (6) .
  • the strip part (8 ') shown is therefore not suitable.
  • Fig. 13 shows a solution, are used in the sleeve bottom strip parts (80 '') in the manufacturing method according to FIG. 9.
  • a partition (25) runs in the water tank (6) in this area, which is indicated by dashed lines.
  • the separating cuts (12 ') run here in such a way that the sleeve bottom strip parts (80' ') adapt to the interior of the water tank and that the recesses (13) formed in this way are used to form the intermediate space for arranging the partition wall (25) .
  • each sleeve (7) with the flange (17) running at one end approximately at right angles to the sleeve axis (18) does not pass directly into the strip-shaped material of the sleeve bottom strip (8). Rather, each flange (17) of a sleeve (7) is connected to the strip part (8) only at three webs (19) which are arranged at equal intervals on the circumference, but is otherwise separated from it by approximately crescent-shaped incisions (20).
  • These incisions (20) in turn are adjacent to the bracket (21) in the embodiment, which as Narrow, flexible connecting bridges are only connected at their ends to the plane of the sleeve bottom strip (8), but are otherwise separated from them by whole narrow crescent-like incisions (22). Two of the brackets (21) therefore open at a common connection point (23) in the plane of the strip-like sleeve base (8).
  • each individual sleeve is largely freely movable on the common strip (8) by this configuration. It can therefore easily adapt to tolerance deviations when inserted into the pipe ends.
  • the individual suspension of the sleeves (7) has the advantage that material can flow out of the area of the flange (17) without that the area of the outer sleeve bottom (8) is affected. Discarding or deforming the connecting parts of the sleeve base (8) between the individual sleeves is thus excluded. A flawless This ensures production with which the necessary tightness of the pipe-floor connection is achieved.

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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)

Description

Die Erfindung betrifft einen Wärmetauscher mit mehreren Rohren, die mit mindestens einem Ende in zugeordneten Öffnungen eines Rohrbodens gehalten sind, wobei im Bereich des Rohrbodens Hülsen in die Rohrenden eingeschoben und kraftschlüssig gegen die Rohre und die Öffnungen im Rohrboden gepreßt sind.The invention relates to a heat exchanger with a plurality of tubes which are held with at least one end in assigned openings in a tube sheet, sleeves being pushed into the tube ends in the region of the tube base and pressed non-positively against the tubes and the openings in the tube sheet.

Wärmetauscher dieser Art sind bekannt (DE-A-35 45 554). Bei diesen bekannten Bauarten ist eine Rohr-Boden-Verbindung vorgesehen, bei der die in die Rohrenden eingeschobenen Hülsen nach ihrem Aufweiten das Rohr fest gegen die Öffnung im Rohrboden drückt, so daß eine flüssigkeitsdichte Verbindung entsteht. Da die Hülse sich weitgehend im Inneren des Rohres befindet, stehen keine Teile der Hülse über die Rohr-Boden-Verbindung hinaus. Rohr-Boden-Verbindungen dieser Art setzen aber das Einsetzen der einzelnen Hülsen in die Rohrenden vor dem Aufweiten voraus. Dies ist verhältnismäßig aufwendig.Heat exchangers of this type are known (DE-A-35 45 554). In these known designs, a tube-bottom connection is provided, in which the sleeves inserted into the tube ends press the tube firmly against the opening in the tube base after they have expanded, so that a liquid-tight connection is produced. Since the sleeve is largely inside the tube, no parts of the sleeve protrude beyond the tube-bottom connection. Pipe-to-floor connections of this type require the individual sleeves to be inserted into the pipe ends before they are expanded. This is relatively expensive.

Es sind auch Wärmetauscher bekannt (DE-C-881 199), bei denen zum Schutz gegen Anfressungen durch Laugen oder schwache Säuren verbleite Rohre und verbleite Rohrböden vorgesehen sind. Bei dieser bekannten Bauart werden die Rohre zunächst in die vorher mit einer homogenen Verbleiungsschicht versehenen Rohrböden eingewalzt und verstemmt. An den Walzstellen werden gesonderte Bleibuchsen eingeschoben und mit den Bleirohren verlötet. Die überstehenden Enden werden umgebördelt und dann mit der auf die Rohrböden aufgebrachten Verbleiung verlötet. Auch bei solchen Wärmetauschern müssen daher die Bleibuchsen getrennt eingesetzt und bearbeitet werden. Da zudem noch eine Verbleiung vorgesehen ist, sind solche Wärmetauscher und ihre Herstellung ebenfalls aufwendig.Heat exchangers are also known (DE-C-881 199), in which tubes and tubesheets are provided to protect them against seizure by bases or weak acids. In this known design, the tubes are first rolled into the tube sheets previously provided with a homogeneous lead layer and caulked. Separate lead sockets are inserted at the rolling points and soldered to the lead tubes. The protruding ends are flanged and then soldered to the lead attached to the tube sheets. In such heat exchangers, the lead bushings must therefore be used and processed separately. Since a lead is also provided, such heat exchangers and their manufacture are also complex.

Der Erfindung liegt die Aufgabe zugrunde, einen Wärmetauscher der eingangs genannten Art so auszubilden, daß das Einsetzen der Hülsen wesentlich vereinfacht wird, so daß auch die Herstellung des Wärmetauschers einfacher wird.The invention has for its object to provide a heat exchanger of the type mentioned in such a way that the insertion of the sleeves is considerably simplified, so that the manufacture of the heat exchanger is also easier.

Zur Lösung dieser Aufgabe wird bei einem Wärmetauscher der eingangs genannten Art vorgesehen, daß mindestens ein Teil der Hülsen an einem gemeinsamen Hülsenboden und jeweils an die Lage der Öffnungen und der Rohre im Rohrboden angepaßt angeordnet ist. Durch diese Ausgestaltung entsteht ein Montageteil, mit dem in einem Arbeitsgang eine Vielzahl von Hülsen an die zugeordneten Stellen gebracht und in einfacher Weise in die Rohr-enden eingesetzt werden können. Die Herstellung von Wärmetauschern mit eingesetzten Hülsen, die eine besonders gute Dichtheit der Rohr-Boden-Verbindung gewährleisten, wird dadurch wesentlich vereinfacht. Dabei können die Hülsen entweder durch Aufweiten gegen die Rohre und die Öffnungen im Rohrboden gepreßt werden oder durch ein axiales Einpressen mit Übermaß (Hülsendurchmesser ist etwas größer als Rohrdurchmesser).To solve this problem it is provided in a heat exchanger of the type mentioned that at least part of the Sleeves is arranged on a common sleeve base and each adapted to the position of the openings and the tubes in the tube sheet. This configuration results in an assembly part with which a plurality of sleeves can be brought to the assigned points in a single operation and inserted in a simple manner into the pipe ends. The manufacture of heat exchangers with inserted sleeves, which ensure a particularly good tightness of the pipe-floor connection, is considerably simplified. The sleeves can either be pressed against the pipes and the openings in the tube sheet by widening or by axially pressing them in excess (sleeve diameter is slightly larger than the tube diameter).

Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet.Advantageous developments of the invention are characterized in the subclaims.

Dabei bringen die Merkmale des Anspruches 2 den Vorteil mit sich, daß sich ein Streifen in besonders einfacher Weise, beispielsweise durch Tiefziehen in der gewünschten Weise herstellen und dann auch besonders einfach bei der Montage handhaben läßt. Nach Anspruch 3 können die Hülsen - wie an sich bekannt - mit einem an einem Ende umlaufenden nach außen gerichten Flansch versehen sein, der das Hereindrücken der Hülsen in die Rohrenden erleichtert und die Lage der Hülsen sichert. In Weiterbildung der Erfindung werden diese Flansche in einer gemeinsamen Ebene durch den Hülsenboden untereinander zu dem Streifen verbunden. Dadurch kann, insbesondere bei stärkerer Ausrundung am Hülseneinlauf, der Einlaufwiderstand reduziert werden. Die Merkmale der Ansprüche 4 und 5 bringen dabei den wesentlichen Vorteil mit sich, daß trotz der Anordnung in einem gemeinsamen streifenartigen Hülsenboden, alle Hülsen weitgehend individuell gehalten sind, so daß sie sich bei der Montage im Rahmen vorhandener Toleranzen jeweils an die zugeordneten Rohrenden anpassen können. Zum anderen bietet diese Ausgestaltung auch den Vorteil, daß beim Aufweitvorgang Material aus dem Flanschbereich der Hülse zum Aufweiten der Hülse nachfließen kann, was nicht oder nicht ohne weiteres möglich wäre, wenn der Flansch ringsrum mit dem Hülsenboden verbunden wäre. Der Hülsenboden würde sich sonst verwerfen. Schließlich ergibt sich der Vorteil, daß der Hülsenboden als Strömungsleitfläche wirkt und damit einen geringeren Strömungsdurchflußwiderstand des Wärmetauschers bewirkt.The features of claim 2 have the advantage that a strip can be produced in a particularly simple manner, for example by deep drawing in the desired manner, and can then also be handled particularly easily during assembly. According to claim 3, the sleeves - as is known per se - be provided with a circumferential flange extending outward at one end, which facilitates the pressing of the sleeves into the pipe ends and secures the position of the sleeves. In a further development of the invention, these flanges are connected to one another in a common plane through the sleeve base to form the strip. As a result, especially when there is a greater fillet at the sleeve inlet, the inlet resistance can be reduced. The features of claims 4 and 5 have the essential advantage that despite the arrangement in a common strip-like sleeve bottom, all sleeves are largely individually held so that they can adapt to the associated pipe ends during assembly within the scope of existing tolerances . On the other hand, this embodiment also has the advantage that material from the Flange area of the sleeve can flow to expand the sleeve, which would not be possible or not easily possible if the flange were connected all around to the bottom of the sleeve. Otherwise the bottom of the case would warp. Finally, there is the advantage that the sleeve base acts as a flow guide surface and thus causes a lower flow resistance of the heat exchanger.

Durch die Ausgestaltung nach Anspruch 5 werden alle Hülsen elastisch am Hülsenboden gehalten. Sie können individuell angepaßt und verformt werden, ohne daß dies wegen der Nachgiebigkeit der mit den Flanschen verbundenen Bügel zu nachteiligen Einflüssen auf den streifenförmigen Hülsenboden führt.Due to the configuration according to claim 5, all sleeves are held elastically on the sleeve bottom. They can be individually adapted and deformed without this leading to adverse effects on the strip-shaped sleeve base due to the flexibility of the brackets connected to the flanges.

Bei kreisförmigen Hülsen, was der Regelfall sein wird, sind die Merkmale des Anspruches 6 vorteilhaft. Es ist natürlich auch möglich, die Hülsen oval oder auch der Form von Flachrohren angepaßt auszubilden, wenn dies erforderlich sein sollte.In the case of circular sleeves, which will be the rule, the features of claim 6 are advantageous. It is of course also possible to design the sleeves oval or in the shape of flat tubes if this should be necessary.

Die Hülsen lassen sich mit dem zugeordneten streifenförmigen Hülsenboden in einfacher Weise, wie vorher angedeutet, tiefziehen. Die Stege zur Halterung der Flansche können ausgestanzt oder angeschnitten werden. Eine einfache und wirtschaftliche Herstellung wird so gewährleistet. Dabei können die Hülsen und Hülsenboden aus einem Metallblech, aber auch aus Kunststoff hergestellt sein.The sleeves can be deep-drawn with the assigned strip-shaped sleeve bottom in a simple manner, as previously indicated. The webs for holding the flanges can be punched out or cut. This ensures simple and economical production. The sleeves and sleeve bottom can be made of a metal sheet, but also of plastic.

In der Zeichnung ist die Erfindung anhand von Ausführungsbeispielen dargestellt und wird im folgenden erläutert. Es zeigen:

Fig. 1
eine schematische Draufsicht auf den Rohrboden eines Wärmetauschers gemäß der Erfindung - in Richtung des Pfeiles I der Fig. 2 gesehen -, wobei nur ein Teil des Rohrbodens gezeigt ist,
Fig. 2
den Schnitt durch den Rohrboden der Fig. 1 längs der Linie II-II in vergrößertem Maßstab,
Fig. 3a
eine nochmals vergrößerte Teildarstellung des Bereichs III in Fig. 2,
Fig. 3b
die Darstellung gemäß Fig. 3a, jedoch vor dem Aufweitvorgang zum Verpressen der Rohre im Rohrboden,
Fig. 4a
eine Darstellung ähnlich Fig. 3a, jedoch für eine andere Art des Herstellvorganges,
Fig. 4b
die Darstellung ähnlich Fig. 3b für die Ausführung nach Fig. 4a,
Fig. 5
eine schematische Darstellung einer Konfektioniermöglichkeit eines gemäß der Erfindung hergestellten streifenförmigen Hülsenbodens mit mehreren Hülsen, der zur Anpassung an entsprechende Rohrböden - wie in den Fig. 12 und 13 gezeigt - in einzelne Teile zerschnitten werden muß,
Fig. 6
eine andere Möglichkeit des Zerteilens eines gemäß der Erfindung ausgebildeten streifenförmigen Hülsenbodens, wobei mit Schrägschnitten gemäß Fig. 5 gearbeitet wird,
Fig. 7 bis 10
Trennmöglichkeiten für den streifenförmigen Hülsenboden, die mit abgestuften Trennschnitten arbeiten,
Fig. 11
eine Möglichkeit, mit zick-zack-förmigen Trennschnitten zu arbeiten,
Fig. 12a und 12b
die schematischen Darstellungen von Rohrböden mit jeweils unterschiedlichen Hülsenbodenteilen,
Fig. 13
eine Darstellung ähnlich Fig. 12a oder 12b, jedoch bei einer anderen Aufteilung und Anordnung von zwei Hülsenbodenstreifen,
Fig. 14
eine vergrößerte Detaildarstellung des Bereiches XIV eines der streifenförmigen Hülsenbodenstücke der Fig. 13 und
Fig.15
den Schnitt durch Fig. 14 längs der Linie XV-XV.
In the drawing, the invention is illustrated using exemplary embodiments and is explained in the following. Show it:
Fig. 1
2 shows a schematic plan view of the tube sheet of a heat exchanger according to the invention, viewed in the direction of arrow I in FIG. 2, only a part of the tube sheet being shown,
Fig. 2
the section through the tube sheet of FIG. 1 along the line II-II on an enlarged scale,
Fig. 3a
2 shows a further enlarged partial view of area III in FIG. 2,
Fig. 3b
3a, but before the expansion process for pressing the tubes in the tube sheet,
Fig. 4a
a representation similar to Fig. 3a, but for a different type of manufacturing process,
Fig. 4b
3b for the embodiment according to FIG. 4a,
Fig. 5
1 shows a schematic representation of a possibility of assembling a strip-shaped sleeve base with several sleeves, which must be cut into individual parts to adapt to corresponding tube sheets, as shown in FIGS. 12 and 13,
Fig. 6
another possibility of dividing a strip-shaped sleeve base designed according to the invention, wherein bevel cuts according to FIG. 5 are used,
7 to 10
Separation options for the strip-shaped sleeve base, which work with graduated separating cuts,
Fig. 11
one way to work with zigzag cuts,
12a and 12b
the schematic representations of tube sheets with different sleeve base parts,
Fig. 13
12a or 12b, but with a different division and arrangement of two sleeve bottom strips,
Fig. 14
an enlarged detail view of the area XIV one of the strip-shaped sleeve bottom pieces of FIGS. 13 and
Fig. 15
the section through Fig. 14 along the line XV-XV.

In den Fig. 1 und 2 ist schematisch ein Wärmetauscher (1) gezeigt, der in an sich bekannter Weise einen Rippenrohrblock besitzt, der aus mehreren parallel nebeneinander angeordneten Rohren (2) und aus zwischen diesen Rohren und senkrecht zu den Rohrachsen verlaufenden lamellenartig angeordneten Rippen (3) besteht. Die in der Fig. 2 gezeigten Rohrenden sind dicht in einen Rohrboden (4) eingepreßt, der, wie Fig. 1 zeigt, jeweils mit einer Vielzahl von Öffnungen (5) (s. Fig. 3b) versehen ist, in die die Rohre (2) mit ihren Enden hereingeschoben und, wie noch anhand der Fig. 3a, 3b bzw. 4a, 4b erläutert werden wird, durch radiales Aufweiten befestigt werden. Der Rohrboden (4) wird dann in bekannter Weise mit einem Wasserkasten (6) versehen, durch den eines der Wärmetauschmittel, vorzugsweise eine Flüssigkeit dem Rippenrohrblock zugeführt werden kann, der seinerseits senkrecht zu den Rohrachsen und quer durch die Zwischenräume zwischen den Rippen (3) mit einem zweiten Wärmetauschmedium, vorzugsweise Luft, durchströmt werden kann. Wärmetauscher dieser Art finden beispielsweise Verwendung als Heizkörper oder Kühler von Kraftfahrzeugen.1 and 2 schematically show a heat exchanger (1) which, in a manner known per se, has a finned tube block which consists of a plurality of tubes (2) arranged parallel to one another and of fins arranged in a lamella-like manner between these tubes and perpendicular to the tube axes (3) exists. The tube ends shown in FIG. 2 are pressed tightly into a tube sheet (4) which, as shown in FIG. 1, is provided with a large number of openings (5) (see FIG. 3b) into which the tubes ( 2) pushed in with their ends and, as will be explained with reference to FIGS. 3a, 3b and 4a, 4b, are fastened by radial widening. The tube sheet (4) is then provided in a known manner with a water tank (6) through which one of the heat exchange means, preferably a liquid, can be fed to the finned tube block, which in turn is perpendicular to the tube axes and across the spaces between the fins (3). can be flowed through with a second heat exchange medium, preferably air. Heat exchangers of this type are used, for example, as radiators or coolers in motor vehicles.

Wie aus den Fig. 1, 2 und 3a aber auch hervorgeht, sind in die offenen Enden der Rohre (2) Hülsen (7) eingesetzt und alle die in die Rohrenden der Rohre (2) eingesetzten Hülsen sind Teil eines in der Form eines Streifens ausgebildeten Hülsenbodens (8), mit dem alle Hülsen (7) gemeinsam gehandhabt und den Rohr-enden zugeführt werden können. Zu diesem Zweck sind die Hülsen (7) an dem Hülsenboden (8) so angebracht, daß ihre Relativlage zueinander auf die Anordnung der Rohre (2) bzw. der Öffnungen (5) im Rohrboden (4) abgestimmt ist. Die Hülsen (7) lassen sich daher gemeinsam, oder wie später noch erläutert werden wird, zumindest zum Teil gemeinsam, dem Rohrboden (4) und den Rohren (2) zuordnen.As can also be seen from FIGS. 1, 2 and 3a, sleeves (7) are inserted into the open ends of the tubes (2) and all of them sleeves inserted into the tube ends of the tubes (2) are part of a sleeve base (8) designed in the form of a strip, with which all sleeves (7) can be handled together and fed to the tube ends. For this purpose, the sleeves (7) are attached to the sleeve bottom (8) so that their relative position to one another is matched to the arrangement of the tubes (2) or the openings (5) in the tube bottom (4). The sleeves (7) can therefore be assigned to the tube sheet (4) and the tubes (2) together, or at least partially together, as will be explained later.

Die Fig. 3a und die Fig. 3b zeigen, daß dies zunächst in der Weise (Fig. 3b) geschieht, daß die Rohre (2) jeweils von einer Seite her in den zugeordneten und die Öffnung (5) bildenden, als Durchzüge ausgebildete Kragen (9) des Rohrbodens (4) eingeschoben werden, wobei die Rohre (2) auch mit den lose aufgeschobenen Rippen (3) in bekannter Weise versehen sind. Ist dies geschehen, so wird der Hülsenboden (8) dem Rohrboden (4) zugeführt, und zwar so, daß die Hülsen (7) in die offenen Enden der Rohre (2) mit entsprechendem Spiel eingeschoben werden. Anhand der Fig. 14 wird noch erläutert werden, daß alle Hülsen (7) hierzu mit einer Möglichkeit zum Ausgleich von Toleranzen versehen sind. Ist dieser Montagezustand gemäß Fig. 3b erreicht, dann wird mit zwei Aufweitwerkzeugen zunächst das Rohr (2) so aufgeweitet, daß die Rippen (3) fest in ihm sitzen. Anschließend wird mit einem zweiten Werkzeug die Hülse (7) so aufgeweitet, daß sie mit dem Rohr (2) nach außen gegen den Kragen (9) des Rohrbodens gepreßt wird. Das Rohr sitzt auf diese Weise dicht im Rohrboden.Fig. 3a and Fig. 3b show that this is initially done in such a way (Fig. 3b) that the tubes (2) each from one side in the associated and forming the opening (5), designed as passages (9) of the tube sheet (4) are inserted, the tubes (2) also being provided with the loosely pushed-on ribs (3) in a known manner. Once this has been done, the sleeve base (8) is fed to the tube sheet (4) in such a way that the sleeves (7) are inserted into the open ends of the tubes (2) with a corresponding amount of play. 14 will be explained that all sleeves (7) are provided with a way to compensate for tolerances. 3b is reached, the tube (2) is first expanded with two expanding tools so that the ribs (3) are firmly seated in it. The sleeve (7) is then widened with a second tool so that it is pressed with the tube (2) outwards against the collar (9) of the tube sheet. In this way, the tube sits tightly in the tube sheet.

Die Fig. 4a und 4b zeigen eine Abwandlung des Herstellvorganges insoweit, als hier zwar der Einsetzvorgang gemäß Fig. 4b analog vorgenommen wird, wie dies anhand der Fig. 3b erläutert ist. Unterschiedlich ist bei der Herstellung lediglich, daß der Rohrbodenbereich mit der Hülse (7) ein und demselben Werkzeug, beispielsweise mit einer Aufweitkugel im selben Umfang aufgeweitet wird, wie das Rohr (2) im Bereich der Rippen (3). Der aufgeweitete Innendurchmesser (di) der Hülse (7) entspricht daher dem aufgeweiteten Rohrdurchmesser (dR).4a and 4b show a modification of the manufacturing process insofar as here the insertion process according to FIG. 4b is carried out analogously, as is explained with reference to FIG. 3b. The only difference in production is that the tube plate area with the sleeve (7) is one and the same tool, for example, is expanded with an expansion ball to the same extent as the tube (2) in the area of the ribs (3). The widened inside diameter (d i ) of the sleeve (7) therefore corresponds to the widened tube diameter (d R ).

Es wird aus dieser Beschreibung deutlich, daß durch die Verwendung des streifenförmigen Hülsenbodens (8), an dem viele Hülsen entsprechend angeordnet sind, der Herstellungsvorgang eines Wärmetauschers gemäß der Erfindung vereinfacht werden kann. Es wird nämlich nicht notwendig, die Vielzahl von Hülsen entweder von Hand oder durch ebenfalls aufwendige Montagevorrichtungen den entsprechenden Rohrenden zuzuordnen. Vorteilhaft ist auch, daß die Hülsen (7) durch den Hülsenboden einen Anschlagbereich erhalten, der das zu weite Einschieben der Hülsen oder ein ungenügendes Einschieben verhindert. Alle Hülsen können in sehr einfacher Weise mit ihren, dem Hülsenboden (8) entsprechenden Flansch fluchtend eingeschoben werden. Der Flansch der Hülsen (7) dient dabei auch als Anschlag für die von der anderen Seite eingeschobenen Enden der Rohre (2).It is clear from this description that the manufacturing process of a heat exchanger according to the invention can be simplified by using the strip-shaped sleeve base (8), on which many sleeves are arranged accordingly. It is namely not necessary to assign the plurality of sleeves to the corresponding pipe ends either by hand or by means of likewise complex assembly devices. It is also advantageous that the sleeves (7) receive a stop area through the sleeve bottom, which prevents the sleeves from being pushed in too far or from being inserted insufficiently. All sleeves can be inserted in a very simple manner with their flange corresponding to the sleeve base (8). The flange of the sleeves (7) also serves as a stop for the ends of the tubes (2) inserted from the other side.

Die Hülsen (7) lassen sich in sehr einfacher Weise beispielsweise im Tiefziehverfahren aus einem von einem Coil abgewickelten Blechstreifen herstellen. Möglich ist es auch, den Hülsenboden mit den Hülsen aus Kunststoff durch Spritzgießen herzustellen. Dieser Streifen muß anschließend in Hülsenbodenstücke (8′) gemäß Fig. 5 unterteilt werden, wobei beim Ausführungsbeispiel der Fig. 5 die Trennschnitte (10) jeweils schräg zur Längsrichtung des Streifens (8) erfolgen, und zwar unter einem Winkel, der dem Winkel angepaßt ist, der sich durch die Anordnung der Hülsen (7) im Streifen (8) ergibt. Strichpunktiert ist die Verbindungslinie (11) zwischen den Achsen von zwei benachbarten Hülsen (7) angedeutet. Unter dem gleichen Winkel zu den Längskanten des Streifens (8) erfolgt der Trennschnitt (10). Die Fig. 6 zeigt eine Abwandlung der Anordnung der Trennschnitte (10) insofern, als hier die Trennschnitte (10, 10′) jeweils unter wechselndem Winkel erfolgen, so daß nicht, wie in der Fig. 5 jeweils parallelepipedförmige Streifenstücke (8′) entstehen, sondern Streifenstücke (8′′) mit untereinander identischer Trapezform.The sleeves (7) can be produced in a very simple manner, for example in a deep-drawing process, from a sheet metal strip unwound from a coil. It is also possible to manufacture the base of the sleeve with the sleeves from plastic by injection molding. This strip must then be subdivided into sleeve base pieces (8 ') according to FIG. 5, the separating cuts (10) each taking place obliquely to the longitudinal direction of the strip (8) in the embodiment of FIG. 5, at an angle which is adapted to the angle is, which results from the arrangement of the sleeves (7) in the strip (8). Dash-dotted lines indicate the connecting line (11) between the axes of two adjacent sleeves (7). The separating cut (10) is made at the same angle to the longitudinal edges of the strip (8). 6 shows a modification of the arrangement of the separating cuts (10) insofar as the separating cuts here (10, 10 ') take place at different angles, so that not, as in Fig. 5 each parallelepiped-shaped strip pieces (8'), but strip pieces (8 '') with mutually identical trapezoidal shape.

Wie anschließend anhand der Fig. 12b erläutert werden wird, reicht das Abtrennen von Hülsenbodenstücken (8′) oder (8′′) durch Schrägschnitte oft nicht aus, um die Einpassung des Hülsenbodens oder der Hülsenbodenstücke in den später vom Wasserkasten (6) beschränkten Raum zu ermöglichen. Die Fig. 7, 8 und 10 sehen daher stufenartig abgesetzte Trennschnitte (12) vor, die aber gemäß Fig. 8 wechselseitig mit symmetrischen Trennschnitten (12′) wechseln können, so daß unterschiedliche Formen von Hülsenbodenstreifenstücken (80 bzw. 80′) entstehen. Fig. 9 bringt eine Abwandlung insofern, als hier Trennschnitte (12′) ebenfalls in Stufenform vorgesehen werden, die hier aber durch die Anordnung einer Ausnehmung (13) bestimmt sind, mit der beim Trennschnitt eine Hülse aus dem streifenförmigen Hülsenboden (8) herausgeschnitten wird. Auch solche Streifenformen (80′′) können je nach Bedarf zur Herstellung der Wärmetauscher verwendet werden. Die Fig. 10 und 11 zeigen unterschiedliche Trennschnitte (14 bzw. 15), die ebenfalls eine unterschiedliche Streifenform (81 bzw. 81′) bei im übrigen gleicher Ausbildung des Hülsenboden-Streifens (8) ermöglichen. Möglich wäre es auch, die Trennschnitte anstelle abgestufter Form auch in gerundeter Form auszuführen.As will be explained below with reference to Fig. 12b, the separation of sleeve bottom pieces (8 ') or (8' ') by bevel cuts is often not sufficient to fit the sleeve bottom or the sleeve bottom pieces into the space later restricted by the water tank (6) to enable. 7, 8 and 10 therefore provide step-like separating cuts (12), which, however, according to FIG. 8 can alternate with symmetrical separating cuts (12 '), so that different shapes of sleeve bottom strip pieces (80 or 80') arise. Fig. 9 brings a modification in that here separating cuts (12 ') are also provided in step form, but here are determined by the arrangement of a recess (13) with which a sleeve from the strip-shaped sleeve bottom (8) is cut out during the separating cut . Such strip shapes (80 '') can be used to manufacture the heat exchanger as needed. 10 and 11 show different separating cuts (14 and 15), which also allow a different strip shape (81 and 81 ') with the same design of the sleeve bottom strip (8). It would also be possible to make the separating cuts in a rounded shape instead of a stepped shape.

Die Fig. 12a und 12b sollen dazu dienen, den Sinn und Zweck dieser verschiedenen Trennschnittanordnung deutlich zu machen. Fig. 12a und 12b zeigen strichpunktiert die Kontur des Wasserkastens (6), dessen innere Wandung (6a bzw. 6a′) die äußersten Rohrpaare so eng als möglich umgeben soll. Der auf der linken Seite (Fig. 12a) über dem Rohrboden (4) angeordnete Hülsenbodenstreifenteil (80′) - der gemäß Fig. 7 oder auch gemäß Fig. 8 hergestellt sein kann -, paßt sich dem linken Rand (6a) des Wasserkastens gut an und verläuft, was nicht näher dargestellt ist, bis zum rechten Rand des Wasserkastens (6) durch. Seine Länge entspricht daher der Länge des Rohrbodens und des Wasserkastens. In der Fig. 12b dagegen ist der Hülsenbodenstreifen (8′) so abgetrennt, daß in der Mitte des Wasserkastens ein rohrfreier Trennraum verbleiben kann, der z.B., was später noch erläutert werden wird, zum Anordnen einer Trennwand zwischen zwei Rohrbündeln ausgenutzt werden kann. Der auf der rechten Hälfte (Fig. 12b) eingesetzte, z.B. gemäß Fig. 5 hergestellte Hülsenbodenstreifenteil (8′) reicht aber beim Beispiel mit seiner rechten unteren Kante (16) in den Bereich der Wand (6a′) des Wasserkastens (6) herein. Für den gezeigten Wasserkasten (6) eignet sich daher der gezeigte Streifenteil (8′) nicht.12a and 12b are intended to make the meaning and purpose of this different separating cut arrangement clear. 12a and 12b show dash-dotted lines the contour of the water tank (6), the inner wall (6a and 6a ') of which should surround the outermost pipe pairs as closely as possible. The on the left side (Fig. 12a) above the tube sheet (4) arranged sleeve bottom strip part (80 ') - which can be made according to Fig. 7 or also according to Fig. 8 - fits the left edge (6a) of the Water box well on and runs, which is not shown in detail, to the right edge of the water box (6). Its length therefore corresponds to the length of the tube sheet and the water tank. In Fig. 12b, on the other hand, the sleeve bottom strip (8 ') is separated so that a tube-free separation space can remain in the middle of the water tank, which, for example, which will be explained later, can be used to arrange a partition between two tube bundles. The used on the right half (Fig. 12b), for example, according to Fig. 5 manufactured sleeve bottom strip part (8 ') extends in the example with its lower right edge (16) into the area of the wall (6a') of the water tank (6) . For the water tank (6) shown, the strip part (8 ') shown is therefore not suitable.

Die Fig. 13 zeigt eine Lösung, bei der Hülsenbodenstreifenteile (80′′) in der Herstellungsart nach den Fig. 9 verwendet werden. Hier fehlen Rohre in der Mitte, weil zum Beispiel zur Herstellung von Wärmetauschern mit getrennter Regelung für Fahrer- und Beifahrerseite in diesem Bereich eine Trennwand (25) im Wasserkasten (6) verläuft, die gestrichelt angedeutet ist. Man erkennt, daß die Trennschnitte (12′) hier so verlaufen, daß sich die Hülsenbodenstreifenteile (80′′) dem Innenraum des Wasserkastens anpassen und daß die dadurch gebildeten Ausnehmungen (13) zur Bildung des Zwischenraumes zur Anordnung der Trennwand (25) ausgenützt werden.Fig. 13 shows a solution, are used in the sleeve bottom strip parts (80 '') in the manufacturing method according to FIG. 9. There are no pipes in the middle because, for example, to produce heat exchangers with separate controls for the driver and front passenger, a partition (25) runs in the water tank (6) in this area, which is indicated by dashed lines. It can be seen that the separating cuts (12 ') run here in such a way that the sleeve bottom strip parts (80' ') adapt to the interior of the water tank and that the recesses (13) formed in this way are used to form the intermediate space for arranging the partition wall (25) .

Die Fig. 14 zeigt, daß jede Hülse (7) mit dem an ihrem einen Ende etwa rechtwinklig zur Hülsenachse (18) verlaufenden Flansch (17) nicht unmittelbar in das streifenförmige Material des Hülsenbodenstreifens (8) übergeht. Jeder Flansch (17) einer Hülse (7) ist vielmehr nur an drei, auf dem Umfang in gleichen Abständen angeordneten Stegen (19) mit dem Streifenteil (8) verbunden, im übrigen aber durch etwa mondsichelförmige Einschnitte (20) davon getrennt. Diese Einschnitte (20) ihrerseits grenzen beim Ausführungsbeispiel an Bügel (21) an, die als schmale nachgiebige Verbindungsbrücken nur jeweils an ihren Enden mit der Ebene des Hülsenbodenstreifens (8) in Verbindung stehen, im übrigen aber von diesen durch ganze schmale mondsichelartige Einschnitte (22) getrennt sind. Jeweils zwei der Bügel (21) münden daher an einer gemeinsamen Verbindungsstelle (23) in die Ebene des streifenartigen Hülsenbodens (8).14 shows that each sleeve (7) with the flange (17) running at one end approximately at right angles to the sleeve axis (18) does not pass directly into the strip-shaped material of the sleeve bottom strip (8). Rather, each flange (17) of a sleeve (7) is connected to the strip part (8) only at three webs (19) which are arranged at equal intervals on the circumference, but is otherwise separated from it by approximately crescent-shaped incisions (20). These incisions (20) in turn are adjacent to the bracket (21) in the embodiment, which as Narrow, flexible connecting bridges are only connected at their ends to the plane of the sleeve bottom strip (8), but are otherwise separated from them by whole narrow crescent-like incisions (22). Two of the brackets (21) therefore open at a common connection point (23) in the plane of the strip-like sleeve base (8).

Anstelle der erläuterten Ausführungsart wäre es auch in einfacherer Weise möglich, keine Einschnitte (20) in mondsichelartiger Form auszustanzen, sondern lediglich kreisbogenförmige Einschnitte längs den in Fig. 14 an der rechten unteren Hülse (7) angedeuteten Trennlinien (30 und 30′) vorzunehmen, so daß auch dann der gleiche Effekt erreicht wird. Die Hülsen sind beim Hülsenziehen während der Herstellung des Hülsenbodens, beim Einsetzen und beim Verformen frei beweglich. Fig. 14 stellt
dann den Einbauzustand des Hülsenstreifens (8) im aufgeweiteten und verformten Zustand der Hülsen (7) und Hülsenflansche (17) dar, in dem sich durch die Verformung die mondsichelförmigen Ausnehmungen (22) und die dann - gestrichelt angedeutet - ebenfalls mondsichelförmigen Ausnehmungen (20′) angrenzend an die Trennschnitte (30, 30′) gebildet haben.
Instead of the described embodiment, it would also be possible in a simpler manner not to punch out incisions (20) in the shape of a crescent moon, but only to make circular incisions along the dividing lines (30 and 30 ') indicated on the lower right sleeve (7) in FIG. 14, so that the same effect is achieved even then. The sleeves are freely movable when pulling the sleeve during the manufacture of the sleeve base, during insertion and during deformation. Fig. 14 represents
then the installed state of the sleeve strip (8) in the expanded and deformed state of the sleeves (7) and sleeve flanges (17), in which the crescent-shaped recesses (22) and the then - indicated by dashed lines - also crescent-shaped recesses (20 ') ) have formed adjacent to the separating cuts (30, 30 ').

Wie aus den Fig. 14 und 15 deutlich wird, ist durch diese Ausgestaltung jede einzelne Hülse weitgehend frei beweglich an dem gemeinsamen Streifen (8) gehalten. Sie kann sich daher beim Einsetzen in die Rohrenden an Toleranzabweichungen leicht anpassen. Auch bei der Verformung durch den Aufweitvorgang, wie er anhand der Fig. 3a, 3b, 4a, 4b beschrieben ist, besteht durch die individuelle Aufhängung der Hülsen (7) der Vorteil, daß Material aus dem Bereich des Flansches (17) nachfließen kann ohne daß der Bereich des außen angrenzenden Hülsenbodens (8) dadurch beeinträchtigt wird. Ein Verwerfen oder Verformen der Verbindungsteile des Hülsenbodens (8) zwischen den einzelnen Hülsen ist damit ausgeschlossen. Eine einwandfreie Herstellung, mit der auch die notwendige Dichtheit der Rohr-Boden-Verbindung erreicht wird, wird dadurch gewährleistet.As is clear from FIGS. 14 and 15, each individual sleeve is largely freely movable on the common strip (8) by this configuration. It can therefore easily adapt to tolerance deviations when inserted into the pipe ends. Even in the case of the deformation caused by the expansion process, as described with reference to FIGS. 3a, 3b, 4a, 4b, the individual suspension of the sleeves (7) has the advantage that material can flow out of the area of the flange (17) without that the area of the outer sleeve bottom (8) is affected. Discarding or deforming the connecting parts of the sleeve base (8) between the individual sleeves is thus excluded. A flawless This ensures production with which the necessary tightness of the pipe-floor connection is achieved.

Claims (10)

  1. Heat-exchanger having a plurality of tubes (2) held by at least one of their ends in associated openings (5), especially in passages (9) of a tube plate (4), with sleeves (7) being inserted into the tube ends in the area of the tube plate (7) and being pressed in force-locking relationship against the tubes and the opening in the tube plate, characterized in that at least part of the sleeves (7) are arranged on a common tube plate (8) in a position adjusted to the position of the openings (5) and the tubes (2) in the tube plate (4) so that during assembly of the heat-exchanger a plurality of sleeves (7) can be easily coordinated with the tube plate and the tubes.
  2. Heat-exchanger according to claim 1, characterized in that the sleeve plate is a portion (8′, 80, 81) of a strip provided with the sleeves (7), which portion has been cut off by a separating cut (10, 12, 14, 15).
  3. Heat-exchanger according to claim 2, characterized in that the sleeves (7) are fixed to the strip by means of flanges (17) extending in the plane of the strip (8).
  4. Heat-exchanger according to claim 3, characterized in that each flange (17) of a sleeve (7) is connected to the sleeve plate strip (8) by narrow webs (19), each of the said webs (19) being separated from the sleeve plate strip (8) and from the neighboring web by slots (20).
  5. Heat-exchanger according to claim 4, characterized in that there are provided three webs distributed evenly about the circumference of each flange (17).
  6. Heat-exchanger according to claim 4, characterized in that the webs (19) are connected to respective brackets (21) whose two ends are connected to the sleeve plate strip in a manner forming sort of a bridge, while being separated from the material of the sleeve plate strip (8) by a slot (22) in the form of a crescent moon.
  7. Heat-exchanger according to claim 6 for sleeves (7) having a cylindrical cross-section, characterized in that the slots (20 and 22) as well as the bridge-like brackets (21) have at least one edge in the form of a circular arc extending over about 120°.
  8. Heat-exchanger according to any of claims 1 to 7, characterized in that the sleeves (7) are deep-drawn from the material of the sleeve plate strip (8).
  9. Heat-exchanger according to any of claims 7 to 8, characterized in that the slots (20, 22) are stamped or cut from the material of the sleeve plate strip (8).
  10. Heat-exchanger according to any of claims 1 to 9, characterized in that the sleeve plate strip (8) and the sleeves consist of a metal or of a plastic material.
EP91103474A 1990-04-13 1991-03-07 Heat-exchanger Expired - Lifetime EP0451507B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4012045 1990-04-13
DE4012045A DE4012045A1 (en) 1990-04-13 1990-04-13 HEAT EXCHANGER

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EP0451507A1 EP0451507A1 (en) 1991-10-16
EP0451507B1 true EP0451507B1 (en) 1994-06-01

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4325427A1 (en) * 1993-07-29 1995-02-02 Behr Gmbh & Co Heat exchanger, in particular a motor vehicle radiator
DE102005032118A1 (en) * 2005-07-07 2007-01-11 Ruhr Oel Gmbh Tube bundle heat exchanger with wear-resistant tube bottom lining
DE102009030824A1 (en) 2009-06-26 2010-12-30 Behr Gmbh & Co. Kg Heat exchanger, particularly coolant cooler for motor vehicles, has tubes, ribs and collecting tank communicating with tubes, where tubes are formed as single ribbed tubes
DE102009057175A1 (en) 2009-12-05 2011-06-09 Volkswagen Ag U-shaped heat exchanger for use as cooler to cool internal combustion engine of motor vehicle, has pipes arranged in perforations, fins and/or ribs provided between pipes, and heat-conducting element arranged at tube bottoms
DE102015102245B4 (en) * 2015-02-17 2022-03-31 Wallstein Ingenieur Gmbh Connection between a tube and a tube sheet of a heat exchanger and method of making such a connection

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7302164U (en) * 1973-05-10 Behr J Sueddeutsche Kuehlerfabrik Elastic sealing element for pipes penetrating a wall
DE881199C (en) * 1939-07-28 1953-06-29 Otto & Co Gmbh Dr C Manufacturing process for internally leaded liquid preheaters
AT287030B (en) * 1966-06-27 1971-01-11 Waagner Biro Ag Device to prevent overheating of the inlet points of the tubes or the tube plates of tube heat exchangers
FR2237160A1 (en) * 1973-07-13 1975-02-07 Chausson Usines Sa Multi tubular finned radiator for vehicle engine coolant - comprising metal tube between plastic reservoir manifolds of matched thermal expansion
US4465129A (en) * 1982-04-19 1984-08-14 Blackstone Corporation Heat exchanger core assembly construction and methods of making the same
DE3545554A1 (en) * 1985-12-21 1987-07-02 Sueddeutsche Kuehler Behr Tube base connection for heat exchanger - uses sleeve with collar in tube ends
FR2610099B1 (en) * 1987-01-28 1990-09-07 Lelant Jean Claude TUBULAR PLATE OF HEAT GENERATOR EXCHANGER
DE3724675A1 (en) * 1987-07-25 1989-02-02 Heraeus Elektroden Heat exchanger

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DE59101753D1 (en) 1994-07-07
DE4012045A1 (en) 1991-10-17

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