EP0328043B1 - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
EP0328043B1
EP0328043B1 EP89102074A EP89102074A EP0328043B1 EP 0328043 B1 EP0328043 B1 EP 0328043B1 EP 89102074 A EP89102074 A EP 89102074A EP 89102074 A EP89102074 A EP 89102074A EP 0328043 B1 EP0328043 B1 EP 0328043B1
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EP
European Patent Office
Prior art keywords
heat exchanger
tension members
collecting
exchanger according
collecting pipe
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
EP89102074A
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German (de)
French (fr)
Other versions
EP0328043A1 (en
Inventor
Christian Greune
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.)
MTU Aero Engines GmbH
Original Assignee
MTU Motoren und Turbinen Union Muenchen GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Publication of EP0328043A1 publication Critical patent/EP0328043A1/en
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Publication of EP0328043B1 publication Critical patent/EP0328043B1/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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0243—Header boxes having a 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
    • 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
    • F28D7/06—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 having a single U-bend
    • 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
    • Y10T29/49352—Repairing, converting, servicing or salvaging

Definitions

  • the invention relates to a heat exchanger according to the preamble of patent claim 1.
  • Such a heat exchanger is known from GB-A-2078361.
  • the header sections are welded together.
  • a disadvantage of the designs described is that, in the event of leaks, which can occur either as a result of incorrect manufacture or as a result of material fatigue, an expensive repair or even an exchange of the entire heat exchanger is often required.
  • a heat exchanger is known in which a manifold consisting of several segments with attached exchange plates is braced by an inner tube which is subjected to tension.
  • the known heat exchanger is a version to be used stationary for hot water heating systems, which is not suitable for special loads caused by inertial forces or extreme temperature differences.
  • the object of the invention is to improve a heat exchanger of the generic type in such a way that a simple and therefore inexpensive repair is possible in the event of leaks, without this being purchased with a significant impairment of the flow conditions in the header pipe.
  • the design and arrangement of the tension rods enables economical production and maintenance of the heat exchanger.
  • the solution according to the invention results in technical simplifications and thus cost reductions in the case of new production and in the repair of heat exchangers which have already been in operation and in which flawless elements can be reused.
  • a symmetrical prestressing of the collecting pipes can be achieved by the collecting pipes resting against the inner walls, the tension rods assuming approximately the temperature of the collecting pipe inner wall and thus thermal stresses remaining low. Furthermore, flow losses through components arranged inside the pipe are prevented. Two or more conditions can be distributed on the inner circumference of a header.
  • the tension rods are insulated from the interior of the header pipes. This is preferably done by providing shield plates and / or insulating layers attached to the tie rod. This further supports the desired effect of the same temperature of the collecting tube and the rods
  • tension rods are screwed from the outside to at least one of the header end sections. This enables simple and detachable bracing of the header pipes.
  • Means for setting a defined prestress on the tension rods are preferably provided, which can be designed as fitting pieces and have meanwhile been inserted into the header end sections and the ends of the tension rods. In this way, an uncomplicated and reproducible adjustable bracing of the heat exchanger can be achieved.
  • FIG. 1 shows a heat exchanger 1, the manifolds 2 and 3 of which consist of a plurality of manifold sections 5, 6 arranged one behind the other.
  • the manifolds 2 and 3 are connected to one another via a plurality of U-shaped profile tubes 21.
  • the mode of operation of the heat exchanger is as follows: A cool gas flow enters the collecting pipe 3 via openings in the collecting pipe section 12. The gas flow divides and flows through the plurality of U-shaped profile tubes embedded in the collecting tube 3 to the collecting tube 2.
  • the gas heats up due to the hot gas flowing in the cross-countercurrent in the direction indicated by 36.
  • the heated inner gas stream combines again in the collecting pipe 2 and flows off.
  • FIG. 2 shows a cross section through a header section 5, in which the tension rods 7 and 8 are arranged on opposite sides of the tube wall 22.
  • the pull rod 7 is shown in the sectional plane, while the pull rod 8 is shown with the fastening threaded bores 23 provided at the ends.
  • a number of profile tubes 21 are attached, which are sealingly connected to the tube wall 22 by means of welding or soldering.
  • guide shoulders 24, 25 are provided near the pipe ends, which prevent the tie rods 7, 8 from slipping sideways or twisting the header sections against one another.
  • the tension rods 7, 8 are provided with an insulating layer 10 and a shield plate 28 for the purpose of shielding the interior 9 of the header section 5.
  • Fig. 3 shows a tension rod 7 which bears against the inside of the tube wall 22.
  • Guide shoulders 24 are provided in the vicinity of the butt joints of manifold sections 5, 6, which prevent the tie rods or manifold sections 5, 6 from slipping sideways.
  • the tension rods 7 and 8 are machined to form parallel side surfaces 27, which enables simple mounting of the tension rods.
  • the tension rods 7 and 8 are fitted in such a way that the parallel side surfaces 27 lie at the level of the guide shoulders 24; the zone of the circular segments 30 can then be brought into engagement with the guide shoulders 24 by moving the tension rods 7, 8 in the longitudinal direction.
  • the end region 31 of the tension rod 7 is widespread, so that the tension rod 7 is supported when tension is applied via the shoulders 32 and the header sections 5, 6 are pressed against one another in a sealing manner.
  • two header pipe sections 5 and 6 are arranged one behind the other, the end of the header pipes being formed by the header pipe end section 11.
  • Two opposite tie rods 7 and 8 run along the inner wall of the collector tube 2, as a result of which they are provided at their ends opposite the collector tube end section 11 with fastening flanges and threaded bores 23 arranged therein, by means of which the tie rods 7 and 8 are clamped to the collector tube end section 11 by means of screws 34.
  • fitting pieces 13 are provided between the tension rods 7, 8 and the header end section 11.
  • the oval bores 35 provided for the introduction of the profiled tubes 21 in the collecting tube sections 5 and 6 are indicated in some areas in FIG. 4.
  • a construction of the collecting pipes 2 and 3 is preferably to be provided, in which the two ends of each tension rod 7, 8 are formed according to FIGS. 3 and 4, that is to say they are supported on the shoulders 32 at one end and at the other end with the collecting pipe end sections 11 and 12 are tense.

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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 bezieht sich auf einen Wärmetauscher gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a heat exchanger according to the preamble of patent claim 1.

Ein solcher Wärmetauscher ist aus der GB-A-2078361 bekannt. Bei diesem vorbekannten Wärmetauscher sind die Sammelrohrabschnitte miteinander verschweißt.Such a heat exchanger is known from GB-A-2078361. In this known heat exchanger, the header sections are welded together.

Die feste Verbindung der Bauteile mittels Löten oder Schweißen wurde bisher als erforderlich angesehen, um zu verhindern, daß im Betrieb Leckströme zwischen den wärmetauschenden Medien auftreten. Dies ist vor allem wegen der erheblichen Thermobeanspruchungen, insbesondere bei instationärem Betrieb oder wegen äußerer oder durch den Gasstrom hervorgerufenen Schwingungen problematisch.The firm connection of the components by means of soldering or welding has hitherto been regarded as necessary in order to prevent leakage currents occurring between the heat-exchanging media during operation. This is problematic above all because of the considerable thermal stress, in particular during unsteady operation or because of external vibrations or vibrations caused by the gas flow.

Nachteilig bei den beschriebenen Ausführungen wirkt sich aus, daß bei Undichtheiten, die entweder durch fehlerhafte Herstellung oder durch Werkstoffermüdung auftreten können, vielfach eine aufwendige Reparatur oder sogar ein Austausch des gesamten Wärmetauschers erforderlich ist.A disadvantage of the designs described is that, in the event of leaks, which can occur either as a result of incorrect manufacture or as a result of material fatigue, an expensive repair or even an exchange of the entire heat exchanger is often required.

Aus der FR-A-669324 ist ein Wärmetauscher bekannt, bei dem ein aus mehreren Segmenten bestehendes Sammelrohr mit befestigten Austauschplatten durch ein auf Zug belastetes Innenrohr verspannt ist. Bei dem vorbekannten Wärmetauscher handelt es sich jedoch um eine stationär für Warmwasserheizungen zu verwendende Ausführung, die für besondere Belastungen durch Trägheitskräfte oder durch extreme Temperaturunterschiede nicht geeignet ist.From FR-A-669324 a heat exchanger is known in which a manifold consisting of several segments with attached exchange plates is braced by an inner tube which is subjected to tension. However, the known heat exchanger is a version to be used stationary for hot water heating systems, which is not suitable for special loads caused by inertial forces or extreme temperature differences.

Aus der FR-A-2122303 ist ein Wärmetauscher mit Sammelrohren bekannt, die durch einen konzentrisch im Inneren verlaufenden Zugstab zusammengehalten sind. Auch dieser Wärmetauscher ist aufgrund seiner Bauart nur für geringe Strömungsgeschwindigkeiten des durchfließenden Mediums ― im Regelfall Wasser ― geeignet.From FR-A-2122303 a heat exchanger with collecting tubes is known, which are held together by a tension rod which runs concentrically inside. Due to its design, this heat exchanger is also only suitable for low flow velocities of the medium flowing through - as a rule water.

Aufgabe der Erfindung ist es, einen Wärmetauscher der gattungsgemäßen Art derart zu verbessern, daß bei auftretenden Leckstellen eine einfache und somit kostengünstige Reparatur möglich ist ohne daß dies mit einer wesentlichen Beeinträchtigung der Strömungsverhältnisse im Sammelrohr erkauft wird.The object of the invention is to improve a heat exchanger of the generic type in such a way that a simple and therefore inexpensive repair is possible in the event of leaks, without this being purchased with a significant impairment of the flow conditions in the header pipe.

Erfindungsgemäß wird die Aufgabe mit den kennzeichnenden Merkmalen des Patentanspruchs 1 gelöst. Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.According to the invention the object is achieved with the characterizing features of patent claim 1. Advantageous developments of the invention result from the subclaims.

Durch die Ausbildung und Anordnung der Zugstäbe ist eine wirtschaftliche Herstellung und Wartung des Wärmetauschers möglich. Es ergeben sich durch die erfindungsgemäße Lösung technische Vereinfachungen und somit Kostenreduzierungen bei Neufertigung, sowie bei der Reparatur von bereits in Betrieb gewesenen Wärmetauschern, bei denen einwandfreie Elemente wiederverwendet werden können.The design and arrangement of the tension rods enables economical production and maintenance of the heat exchanger. The solution according to the invention results in technical simplifications and thus cost reductions in the case of new production and in the repair of heat exchangers which have already been in operation and in which flawless elements can be reused.

Durch das Anliegen der Sammelrohre an den Innenwänden ist eine symmetrische Vorspannung der Sammelrohre erreichbar, wobei die Zugstäbe etwa die Temperatur der Sammelrohrinnenwand annehmen und somit Thermospannungen niedrig bleiben. Weiterhin werden Strömungsverluste durch im Rohrinneren angeordnete Bauteile verhindert. Es können dabei zwei oder auch mehrere Zustäbe am inneren Umfang eines Sammelrohres verteilt sein.A symmetrical prestressing of the collecting pipes can be achieved by the collecting pipes resting against the inner walls, the tension rods assuming approximately the temperature of the collecting pipe inner wall and thus thermal stresses remaining low. Furthermore, flow losses through components arranged inside the pipe are prevented. Two or more conditions can be distributed on the inner circumference of a header.

In bevorzugter Weiterbildung der Erfindung sind die Zugstäbe gegenüber dem Innenraum der Sammelrohre isoliert. Dies geschieht vorzugsweise dadurch, daß Schirmbleche und/oder auf dem Zuganker angebrachte Isolierschichten vorzusehen sind. Dadurch wird der erwünschte Effekt gleicher Temperatur von Sammelrohr und Zustäben weiter unterstütztIn a preferred development of the invention, the tension rods are insulated from the interior of the header pipes. This is preferably done by providing shield plates and / or insulating layers attached to the tie rod. This further supports the desired effect of the same temperature of the collecting tube and the rods

Eine weitere bevorzugte Ausgestaltung der Erfindung sieht vor, daß die Zugstäbe mit mindestens einem der Sammelrohrendabschnitte von außen verschraubt sind. Dadurch ist eine einfache und lösbare Verspannung der Sammelrohre möglich. Vorzugsweise sind Mittel zur Einstellung einer definierten Vorspannung an den Zugstäben vorgesehen, die als Paßstücke ausgebildet sein können und inzwischen den Sammelrohrendabschnitten und den Enden der Zugstäbe eingelegt sind. Hierdurch ist eine unkomplizierte und reproduzierbar einstellbare definierte Verspannung des Wärmetauschers erzielbar.Another preferred embodiment of the invention provides that the tension rods are screwed from the outside to at least one of the header end sections. This enables simple and detachable bracing of the header pipes. Means for setting a defined prestress on the tension rods are preferably provided, which can be designed as fitting pieces and have meanwhile been inserted into the header end sections and the ends of the tension rods. In this way, an uncomplicated and reproducible adjustable bracing of the heat exchanger can be achieved.

Die Erfindung wird nachfolgend anhand der beigefügten Zeichnung weiter erläutert. Dabei zeigt:

Fig. 1
eine Schrägansicht des demontierten Wärmetauschers,
Fig. 2
einen Querschnitt durch ein Sammelrohr,
Fig. 3
eine Teilansicht eines Zugstabes,
Fig. 4
einen Axialschnitt durch ein Sammelrohr.

The invention is further explained below with reference to the accompanying drawing. It shows:
Fig. 1
an oblique view of the dismantled heat exchanger,
Fig. 2
a cross section through a manifold,
Fig. 3
a partial view of a tension rod,
Fig. 4
an axial section through a header.

In Fig. 1 ist ein Wärmetauscher 1 gezeigt, dessen Sammelrohre 2 und 3 aus mehreren hintereinander angeordneten Sammelrohrabschnitten 5, 6 bestehen. Die Sammelrohre 2 und 3 sind über eine Vielzahl U-förmig gebogener Profilröhrchen 21 miteinander verbunden. Die Wirkungsweise des Wärmetauschers ist folgende: Ein kühler Gasstrom tritt über Öffnungen in Sammelrohrabschnitt 12 in das Sammelrohr 3 ein. Der Gasstrom teilt sich auf und durchfließt die Vielzahl der in dem Sammelrohr 3 eingelassenen U-förmig gekrümmten Profilröhrchen zum Sammelrohr 2.1 shows a heat exchanger 1, the manifolds 2 and 3 of which consist of a plurality of manifold sections 5, 6 arranged one behind the other. The manifolds 2 and 3 are connected to one another via a plurality of U-shaped profile tubes 21. The mode of operation of the heat exchanger is as follows: A cool gas flow enters the collecting pipe 3 via openings in the collecting pipe section 12. The gas flow divides and flows through the plurality of U-shaped profile tubes embedded in the collecting tube 3 to the collecting tube 2.

Dabei erhitzt sich das Gas aufgrund des außen in der mit 36 angedeuteten Richtung im Kreuz-Gegenstrom anfließenden Heißgases. Der erwärmte innere Gasstrom vereinigt sich wieder im Sammelrohr 2 und fließt ab.The gas heats up due to the hot gas flowing in the cross-countercurrent in the direction indicated by 36. The heated inner gas stream combines again in the collecting pipe 2 and flows off.

In Fig. 2 ist ein Querschnitt durch einen Sammelrohrabschnitt 5 zu sehen, bei dem die Zugstäbe 7 und 8 an gegenüberliegenden Seiten der Rohrwand 22 angeordnet sind. Der Zugstab 7 ist in der Schnittebene dargestellt, während der Zugstab 8 mit den an den Enden vorgesehenen Befestigungsgewindebohrungen 23 gezeigt ist. In der Rohrwand 22 sind eine Anzahl Profilröhrchen 21 angebracht, die mittels Schweißung oder Lötung mit der Rohrwand 22 dichtend verbunden sind. In Umfangsrichtung beidseitig der Zugstäbe 7, 8 sind nahe den Rohrenden Führungsschultern 24, 25 vorgesehen, die ein seitliches verrutschen der Zugstäbe 7, 8 bzw. ein verdrehen der Sammelrohrabschnitte gegeneinander verhindern. Die Zugstäbe 7, 8 sind zwecks Abschirmung vom Innenraum 9 des Sammelrohrabschnittes 5 mit einer Isolierschicht 10 und einem Schirmblech 28 versehen.2 shows a cross section through a header section 5, in which the tension rods 7 and 8 are arranged on opposite sides of the tube wall 22. The pull rod 7 is shown in the sectional plane, while the pull rod 8 is shown with the fastening threaded bores 23 provided at the ends. In the tube wall 22, a number of profile tubes 21 are attached, which are sealingly connected to the tube wall 22 by means of welding or soldering. In the circumferential direction on both sides of the tie rods 7, 8, guide shoulders 24, 25 are provided near the pipe ends, which prevent the tie rods 7, 8 from slipping sideways or twisting the header sections against one another. The tension rods 7, 8 are provided with an insulating layer 10 and a shield plate 28 for the purpose of shielding the interior 9 of the header section 5.

Fig. 3 zeigt einen Zugstab 7, der innen an der Rohrwand 22 anliegt. In der Nähe der Stoßstellen hintereinander angeordneter Sammelrohrabschnitte 5, 6 sind Führungsschultern 24 vorgesehen, die ein seitliches verrutschen der Zugstäbe bzw. der Sammelrohrabschnitte 5, 6 verhindern. In Teilabschnitten 26 sind die Zugstäbe 7 und 8 zur Bildung paralleler Seitenflächen 27 bearbeitet, wodurch ein einfaches Montieren der Zugstäbe ermöglicht wird. Dazu werden die Zugstäbe 7 und 8 so eingepaßt, daß die Parallelseitenflächen 27 in Höhe der Führungsschultern 24 liegen; anschließend läßt sich durch Verschieben der Zugstäbe 7, 8 in Längsrichtung die Zone der Kreissegmente 30 in Eingriff mit den Führungsschultern 24 bringen.Fig. 3 shows a tension rod 7 which bears against the inside of the tube wall 22. Guide shoulders 24 are provided in the vicinity of the butt joints of manifold sections 5, 6, which prevent the tie rods or manifold sections 5, 6 from slipping sideways. In sections 26, the tension rods 7 and 8 are machined to form parallel side surfaces 27, which enables simple mounting of the tension rods. For this purpose, the tension rods 7 and 8 are fitted in such a way that the parallel side surfaces 27 lie at the level of the guide shoulders 24; the zone of the circular segments 30 can then be brought into engagement with the guide shoulders 24 by moving the tension rods 7, 8 in the longitudinal direction.

Der Endbereich 31 des Zugstabes 7 ist verbreitet, so daß eine Abstützung des Zugstabes 7 bei Aufbringung einer Zugspannung über die Schultern 32 erfolgt und die Sammelrohrabschitte 5, 6 dichtend aufeinander gedrückt werden.The end region 31 of the tension rod 7 is widespread, so that the tension rod 7 is supported when tension is applied via the shoulders 32 and the header sections 5, 6 are pressed against one another in a sealing manner.

In dem in Fig. 4 gezeigten Axialschnitt durch ein Sammelrohr 2 sind zwei Sammelrohrabschnitte 5 und 6 hintereinander angeordnet, wobei der Abschluß der Sammelrohre durch den Sammelrohrendabschnitt 11 gebildet wird. Zwei gegenüberliegende Zugstäbe 7 und 8 verlaufen entlang der Innenwand des Sammelrohres 2, wodurch diese an ihrem den Sammelrohrendabschnitt 11 gegenüberliegenden Enden mit Befestigungsflanschen und darin angebrachten Gewindebohrungen 23 versehen sind, mittels dessen die Zugstäbe 7 und 8 mit dem Sammelrohrendabschnitt 11 über Schrauben 34 verspannt sind.In the axial section through a header pipe 2 shown in FIG. 4, two header pipe sections 5 and 6 are arranged one behind the other, the end of the header pipes being formed by the header pipe end section 11. Two opposite tie rods 7 and 8 run along the inner wall of the collector tube 2, as a result of which they are provided at their ends opposite the collector tube end section 11 with fastening flanges and threaded bores 23 arranged therein, by means of which the tie rods 7 and 8 are clamped to the collector tube end section 11 by means of screws 34.

Zwecks Einstellung einer definierten Vorspannung sind Paßstücke 13 zwischen den Zugstäben 7, 8 und den Sammelrohrendabschnitt 11 vorgesehen. Die zur Einführung der Profilröhrchen 21 in den Sammenrohrabschnitten 5 und 6 vorgesehenen ovalen Bohrungen 35 sind in Fig. 4 bereichsweise angedeutet.In order to set a defined pretension, fitting pieces 13 are provided between the tension rods 7, 8 and the header end section 11. The oval bores 35 provided for the introduction of the profiled tubes 21 in the collecting tube sections 5 and 6 are indicated in some areas in FIG. 4.

Vorzugsweise ist ein Aufbau der Sammelrohre 2 und 3 vorzusehen, bei dem die beiden Enden jedes Zugstabes 7, 8 gemäß den Fig. 3 und 4 ausgebildet sind, das heißt sich an ihrem einen Ende an den Schultern 32 abstützen und am anderen Ende mit dem Sammelrohrendabschnitten 11 und 12 verspannt sind.A construction of the collecting pipes 2 and 3 is preferably to be provided, in which the two ends of each tension rod 7, 8 are formed according to FIGS. 3 and 4, that is to say they are supported on the shoulders 32 at one end and at the other end with the collecting pipe end sections 11 and 12 are tense.

Claims (8)

1. Heat exchanger having two substantially parallel collecting pipes (2, 3) which are in communication with each other by means of a plurality of profiled pipes (21) arranged in bundles, and comprise a number of collecting pipe sections (5, 6) which are detachably arranged axially one behind the other in sealed manner, characterised in that the collecting pipes (2, 3) are held together by means of tension members (7, 8) supported on collecting pipe end sections (11, 12) and arranged inside the collecting pipes (2, 3), these tension members having a ring-section-like cross-sectional shape which is adapted to the collecting pipe curvature, and abut those inner wall sections of the collecting pipes (2, 3) which are not penetrated by profiled pipes (21).
2. Heat exchanger according to claim 1, characterised in that two oppositely disposed tension members (7, 8) are provided in each collecting pipe (2, 3).
3. Heat exchanger according to claim 1, characterised in that the tension members (7, 8) are insulated with respect to the interior (9) of the collecting pipes (2, 3).
4. Heat exchanger according to claim 3, characterised in that the insulation consists of a shield plate (28) and/or of an insulating layer (10) applied to the tie rod (7, 8).
5. Heat exchanger according to one or more of claims 1 to 4, characterised in that the tension members (7, 8) are screwed to at least one of the collecting pipe end sections (11, 12) from the outside.
6. Heat exchanger according to one or more of claims 1 to 5, characterised in that means are provided for setting a specific prestress of the tension members (7, 8).
7. Heat exchanger according to claim 6, characterised in that the means for setting the prestress are fitting pieces (13) which are inserted on at least one of the collecting pipe end sections (11, 12) between these and the ends of the tension members (7, 8).
8. Heat exchanger according to one or more of claims 1 to 7, characterised in that the collecting pipe sections (5, 6) have guide shoulders (24, 25) (sic) at both ends which are provided on both sides of the tension members (7, 8).
EP89102074A 1988-02-10 1989-02-07 Heat exchanger Expired - Lifetime EP0328043B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3803948A DE3803948A1 (en) 1988-02-10 1988-02-10 HEAT EXCHANGER
DE3803948 1988-02-10

Publications (2)

Publication Number Publication Date
EP0328043A1 EP0328043A1 (en) 1989-08-16
EP0328043B1 true EP0328043B1 (en) 1991-08-28

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US (1) US4969510A (en)
EP (1) EP0328043B1 (en)
JP (1) JP2730587B2 (en)
DE (1) DE3803948A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3911257C2 (en) * 1989-04-07 1994-05-26 Mtu Muenchen Gmbh Heat exchanger
DE3914773C2 (en) * 1989-05-05 1994-03-03 Mtu Muenchen Gmbh Heat exchanger with at least two header pipes
US5177865A (en) * 1989-05-05 1993-01-12 Mtu Motoren-Und Turbinen-Union Method for making heat exchanger having at least two collecting pipes
US5623987A (en) * 1992-08-04 1997-04-29 Ergenics, Inc. Modular manifold gas delivery system
CN100453950C (en) * 2005-02-16 2009-01-21 吕学能 Vortex cold medium coiler and fin-free condenser
DE102006021436A1 (en) * 2006-05-09 2007-11-15 Mtu Aero Engines Gmbh Gas turbine engine
US20120103578A1 (en) * 2009-04-29 2012-05-03 Westinghouse Electric Company Llc Modular plate and shell heat exchanger
DE102010037152B4 (en) * 2010-08-25 2022-08-25 Gea Wtt Gmbh Sealed plate heat exchanger
US10190828B2 (en) * 2015-10-22 2019-01-29 Hamilton Sundstrand Corporation Heat exchangers
WO2021029809A1 (en) * 2019-08-12 2021-02-18 Enjay Ab A battery device for a ventilation system

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE214188C (en) *
US916640A (en) * 1908-03-23 1909-03-30 Robert Warg Steam-radiator.
GB134277A (en) * 1918-10-24 1919-10-24 John Melville James Improvements in or relating to Radiators for Cooling Fluids.
DE730039C (en) * 1935-12-11 1943-01-06 Getefo Ges Fuer Tech Fortschri Radiators for aircraft and motor vehicles
CH205111A (en) * 1938-08-15 1939-06-15 Spielvogel Erwin Cast iron articulated radiator.
FR859510A (en) * 1939-05-22 1940-12-20 Chausson Usines Sa Advanced radiator
DE1928146U (en) 1965-09-03 1965-12-02 H & K Moll O H G ROUND STAND FOR SETTING UP FOLDERS OD. DGL. DEPOSIT CONTAINERS.
DE1928146A1 (en) * 1968-06-06 1969-12-11 Delaney Gallay Ltd Heat exchanger
US3689972A (en) * 1970-11-19 1972-09-12 Modine Mfg Co Method of fabricating a heat exchanger
FR2122303B1 (en) * 1971-01-19 1973-12-07 George Auguste
GB2078361A (en) * 1980-06-24 1982-01-06 Delanair Ltd Heat exchangers and heat exchanger headers
DE3146089C2 (en) * 1981-11-20 1985-01-24 MTU Motoren- und Turbinen-Union München GmbH, 8000 München Heat exchanger for gases with very different temperatures
DE3543893A1 (en) * 1985-12-12 1987-06-25 Mtu Muenchen Gmbh HEAT EXCHANGER
DE3635549C1 (en) * 1986-10-20 1988-03-03 Mtu Muenchen Gmbh Heat exchanger

Also Published As

Publication number Publication date
JP2730587B2 (en) 1998-03-25
EP0328043A1 (en) 1989-08-16
US4969510A (en) 1990-11-13
DE3803948C2 (en) 1990-04-05
DE3803948A1 (en) 1989-08-24
JPH01247989A (en) 1989-10-03

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