EP2080979B1 - Combustion engine cooler - Google Patents

Combustion engine cooler Download PDF

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Publication number
EP2080979B1
EP2080979B1 EP08170044A EP08170044A EP2080979B1 EP 2080979 B1 EP2080979 B1 EP 2080979B1 EP 08170044 A EP08170044 A EP 08170044A EP 08170044 A EP08170044 A EP 08170044A EP 2080979 B1 EP2080979 B1 EP 2080979B1
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EP
European Patent Office
Prior art keywords
sealing
combustion engine
cooler
web
internal combustion
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.)
Not-in-force
Application number
EP08170044A
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German (de)
French (fr)
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EP2080979A1 (en
Inventor
Franz Dellen
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Pierburg GmbH
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Pierburg GmbH
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Publication of EP2080979A1 publication Critical patent/EP2080979A1/en
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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/18—Arrangements or mounting of liquid-to-air heat-exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2230/00—Sealing means

Definitions

  • the invention relates to an internal combustion engine radiator for cooling a liquid coolant, which in turn can cool an internal combustion engine.
  • a cooler according to the preamble of claim 1 is made FR 2 579 311 and DE 2 923 857 A known.
  • the radiator for an internal combustion engine is a heat exchanger in which a liquid coolant is cooled by the ambient air flowing through the radiator.
  • Most internal combustion engine coolers are composed of multiple housing parts. In this way, complex cooler structures can be realized, the use of expensive raw materials can be reduced and the weight of the cooler can be minimized and optimized.
  • Common combustion engine radiator have as housing parts a heat exchanger made of metal and each laterally attached water jacket shells made of plastic. Such a heat exchanger is off DE 2 923 857 A known.
  • the aforementioned housing parts each have superimposed mounting flanges, which are interconnected by a mechanical connection, for example by metal retaining clips. For liquid-tight sealing of the flange connection elastic sealing lips are embedded in a mounting flange or in both mounting flanges, which are pressed together by the flange connection and seal in this way.
  • the object of the invention is in contrast to provide an internal combustion engine radiator with an improved liquid-tight and pressure-tight seal between two housing parts.
  • the internal combustion engine radiator according to the invention has on the mounting flange of a housing part a circumferential sealing groove and on the mounting flange of the other housing part in the sealing groove projecting circumferential sealing web, which is inserted with interference fit in the sealing groove, wherein the plug axis approximately perpendicular to the force axis of the pressing force stands. Due to the press fit of the sealing web in the sealing groove, the flange seal is sealed liquid-tight and pressure-tight. The actual seal is therefore no longer in the plane of the opposing flange surfaces, but takes place in the seal groove. The force with which the seal is generated or supported is therefore not dependent on the actual connection of the two housing parts or the two mounting flanges together.
  • connection of the mounting flanges together has no immediate effect on the quality of the seal, since the sealing quality determining pressing force is independent of the connection force of the flange connection.
  • the pressing force which is present between the sealing web and the sealing groove, is almost independent of the flange connection. In this way, a durable and reliable, liquid-tight and pressure-tight connection of the two housing parts is realized together.
  • the seal is relatively insensitive to external damage and deformation of the housing, the mounting flanges or the connecting means.
  • the sealing web on a rigid web body and a deformable sealing lip, wherein the web body width is less than the seal width, and the sealing lip is arranged on one of the two web body sides such that the seal web width is greater than the groove width with a relaxed sealing lip.
  • the sealing web thus consists essentially of two parts, namely the rigid web body and the deformable sealing lip.
  • the sealing lip is continuously circulating over the entire course of the web body.
  • the sealing lip is arranged on at least one side of the web body, but it can be provided on each of the two sides of the web body each have a circumferential sealing lip.
  • the sealing lip is deformed during insertion of the sealing web in the sealing groove such that the sealing web can be inserted as a whole in the sealing groove.
  • the web body is made of a material which in particular has a high fatigue strength and stability.
  • the separate sealing lip is designed for a long-lasting elasticity, which ensures a reliable seal in the long term.
  • the sealing lip is elastically deformable.
  • the sealing lip consists for example of rubber and / or of an elastically deformable plastic.
  • the sealing lip is positively secured to the web body.
  • the sealing lip may have undercut retaining fingers, which are inserted into corresponding retaining openings of the web body. In this way, a simple and quick installation of the sealing lip on the web body is possible.
  • the sealing lip can be fixed to the web body in other ways, for example by gluing or welding.
  • connection of the two housing parts is formed by the two mounting flanges comprehensive retaining clips.
  • This connection technology makes the assembly easy and inexpensive. Since the seal is no longer guaranteed directly by the superimposed mounting flanges, but by the arrangement consisting of the sealing web and the sealing groove, are not very high on the flange
  • a housing part made of aluminum and the other housing part made of plastic is common in contemporary engine coolers.
  • Aluminum has excellent thermal conductivity properties and plastic is inexpensive, available in complex shapes and lightweight.
  • a housing part of the actual heat exchanger of the radiator and the second housing part is a water jacket shell at one or at both longitudinal ends of the heat exchanger, as for example DE 2923857 A is known.
  • FIG. 1 is shown in cross section a part of an internal combustion engine radiator 10 for cooling a liquid coolant.
  • a liquid coolant for cooling a liquid coolant.
  • the coolant used is preferably water, that is within the cooling circuit comprising the radiator 10 under pressure, so that the boiling point of the water is above 100 ° C.
  • the radiator 10 consists essentially of two or more housing parts 12, 14, which are assembled to the radiator.
  • a first housing part 12 which is an aluminum heat exchanger
  • a second housing part 14 which forms a plastic water jacket shell
  • the cooler 10 may comprise further housing parts, which in the FIG. 1 have been omitted for simplicity.
  • the housing parts 12, 14 form a liquid-tight and pressure-tight coolant housing 11.
  • a mechanical connection 15 is provided, which connects the mounting flanges 30, 32 of the first and second housing part 12, 14 firmly together.
  • the housing part mounting flanges 30, 32 each have mutually facing mutually parallel support surfaces 31, 33 which lie on one another.
  • the two mounting flanges 30, 32, the two housing parts 12, 14 are held together by a mechanical connection 15 in the form of a plurality of metal retaining clips 16.
  • the retaining clips 16 have barbs 67, which engage in corresponding retaining openings 69 of the mounting flanges 30, 32. With the retaining clips 16, a simple mechanical connection 15 of the two mounting flanges 30, 32, realized.
  • the mounting flange 30 of a housing part 12 has a circumferential sealing groove 17 into which a sealing web 20 of the other housing part 14 protrudes.
  • the sealing web 20 protrudes from the respective mounting flange 32 and is designed such that it is inserted with a press fit into the sealing groove 17.
  • the sealing web 20 of the FIG. 1 is in the FIG. 2 shown enlarged.
  • the sealing web 20 has a stiff web body 22 and a deformable sealing lip 18.
  • the width S of the web body 22 is less than the width D of Sealing groove 17.
  • the seal web width G with the sealing lip 18 relaxed, as in FIG. 2 is greater than the seal groove width D.
  • the sealing lip 18 is elastically deformable, and consists for example of rubber or of an elastic plastic.
  • the sealing lip 18 is positively secured to the web body 22.
  • the sealing lip 18 undercut retaining fingers 60; 61, which in corresponding holding openings 64; 66, the web body 22; 22 'stuck.
  • the retaining fingers 60; 61 are formed approximately T-shaped.
  • the retaining fingers 60; 61 each consist of a connecting pin 26; 46 and a crossbar 28; 48.
  • the crossbar 28 may be formed as a simple beam, as in the Figures 1 - 3
  • the cross bar 48 may also be formed, for example dovetail-shaped, as in FIG. 4 shown.
  • sealing lip body 24; 44; 52 is continuous over the entire flange circumference, the retaining fingers 60; 61 arranged singly over the entire length of the sealing lip body 24, for example, every 10 mm.
  • the sealing lip body 24 is semicircular in cross section.
  • the sealing lip 18 may sit in a corresponding retaining groove 70 of the web body 22 to fix the sealing lip body 24 in position with respect to the plugging direction.
  • the retaining fingers 60; 61 are a plurality of holding openings 64; 66 in the web body 22; 22 ', in which the retaining fingers 60; 61 are inserted or injected.
  • the sealing web 20 is seated with an interference fit in the sealing groove 17 such that its plug-in axis 21 is approximately perpendicular to the force axis 23 of the pressing force.
  • the plug-in axis 21 is the axis in which the sealing web 20 is inserted into the sealing groove 17.
  • the force axis 23 of the pressing force is the axis in which the spring force of the sealing lip 18 substantially acts. Since this pressing force is applied between the two groove walls of the sealing groove 17, a sufficient seal is provided at all times, even if the mechanical flange connection 15 is weakened in one place, for example by the absence of a retaining clip 16.
  • the sealing quality of the liquid and pressure-tight sealing is not depending on the quality of the mechanical connection 15, but largely independent of it.
  • sealing lip 42 In the in the FIG. 3 illustrated embodiment of a sealing web 20 ' is the sealing lip 42 relative to the in the Figures 1 and 2 illustrated embodiment varies.
  • the sealing lip 42 has a rectangular cross-section sealing lip body 44 which rests on the groove-free web body 22 '.
  • the sealing lip body 52 has three mutually parallel lip webs 54. As a result, even if the sealing lip body 52 is damaged, it is largely ensured that a liquid-tight and pressure-tight seal is maintained.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gasket Seals (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

The cooler (10) has a coolant housing (11) comprising a housing part (14) i.e. plastic-cooling jacket shell, connected with a housing part (12) i.e. aluminum-heat exchanger, in a liquid-tight and pressure-tight manner. A mechanical connection (15) connects fixing flanges (30, 32) of the housing parts with each other. A circular sealing groove (17) and a sealing rod (20) are attached to the respective flanges, where sealing rod is inserted into the groove in a press-fit manner. A full-floating axis stands perpendicular to a force axis of a pressing force between the sealing rod and the groove.

Description

Die Erfindung bezieht sich auf einen Verbrennungsmotor-Kühler zum Kühlen eines flüssigen Kühlmittels, das seinerseits einen Verbrennungsmotor kühlen kann. Ein kühler nach dem Oberbegriff des Anspruchs 1 ist aus FR 2 579 311 und DE 2 923 857 A bekannt.The invention relates to an internal combustion engine radiator for cooling a liquid coolant, which in turn can cool an internal combustion engine. A cooler according to the preamble of claim 1 is made FR 2 579 311 and DE 2 923 857 A known.

Der Kühler für einen Verbrennungsmotor ist ein Wärmetauscher, in dem ein flüssiges Kühlmittel durch die den Kühler durchströmende Umgebungsluft gekühlt wird. Die meisten Kühler für Verbrennungsmotoren werden aus mehreren Gehäuseteilen zusammengesetzt. Auf diese Weise können komplexe Kühlerstrukturen realisiert werden, kann der Einsatz an teuren Rohstoffen reduziert und kann das Gewicht des Kühlers minimiert und optimiert werden. Gängige Verbrennungsmotor-Kühler weisen als Gehäuseteile einen Wärmetauscher aus Metall und jeweils seitlich angesetzte Wassermantelschalen aus Kunststoff auf. Ein derartiger Wärmetauscher ist aus DE 2 923 857 A bekannt. Die vorgenannten Gehäuseteile weisen jeweils aufeinander liegende Befestigungsflansche auf, die durch eine mechanische Verbindung, beispielsweise durch Metall-Halteklammern miteinander verbunden sind. Zur flüssigkeitsdichten Abdichtung der Flanschverbindung sind elastische Dichtlippen in einen Befestigungsflansch oder in beide Befestigungsflansche eingelassen, die durch die Flansch-Verbindung aufeinander gedrückt werden und auf diese Weise abdichten.The radiator for an internal combustion engine is a heat exchanger in which a liquid coolant is cooled by the ambient air flowing through the radiator. Most internal combustion engine coolers are composed of multiple housing parts. In this way, complex cooler structures can be realized, the use of expensive raw materials can be reduced and the weight of the cooler can be minimized and optimized. Common combustion engine radiator have as housing parts a heat exchanger made of metal and each laterally attached water jacket shells made of plastic. Such a heat exchanger is off DE 2 923 857 A known. The aforementioned housing parts each have superimposed mounting flanges, which are interconnected by a mechanical connection, for example by metal retaining clips. For liquid-tight sealing of the flange connection elastic sealing lips are embedded in a mounting flange or in both mounting flanges, which are pressed together by the flange connection and seal in this way.

Als Kühlmittel in Kraftfahrzeugen wird in aller Regel Wasser verwendet. Da Verbrennungsmotoren mit einer Temperatur von ca. 90 °C betrieben werden, steht der Kühlkreislauf, steht also das Kühlmittel in dem Kühler unter Druck, um den Siedepunkt des Wassers auf über 100 °C zu erhöhen. Schon bei kleinen Undichtigkeiten zwischen den Befestigungsflanschen der beiden Gehäuseteile kann das unter Druck stehende Kühlmittel aus dem Kühler austreten. Die Dichtigkeit der Flanschabdichtung kann durch kleine Deformationen der Befestigungsflansche, durch eineAs a coolant in motor vehicles water is usually used. Since internal combustion engines are operated at a temperature of about 90 ° C, is the cooling circuit, so is the coolant in the cooler under pressure to increase the boiling point of the water to about 100 ° C. Even with small leaks between the mounting flanges of the two housing parts, the pressurized coolant can escape from the radiator. The tightness of the flange seal can be caused by small deformations of the mounting flanges, by a

Verschlechterung der mechanischen Flansch-Verbindung oder durch andere äußere mechanische Einflüsse relativ leicht gestört werden.Deterioration of the mechanical flange connection or be easily disturbed by other external mechanical influences.

Aufgabe der Erfindung ist es demgegenüber, einen Verbrennungsmotor-Kühler mit einer verbesserten flüssigkeitsdichten und druckdichten Abdichtung zwischen zwei Gehäuseteilen zu schaffen.The object of the invention is in contrast to provide an internal combustion engine radiator with an improved liquid-tight and pressure-tight seal between two housing parts.

Diese Aufgabe wird erfindungsgemäß mit den Merkmalen des Patentanspruches 1 gelöst.This object is achieved by the features of claim 1.

Der erfindungsgemäße Verbrennungsmotor-Kühler weist an dem Befestigungsflansch des einen Gehäuseteiles eine umlaufende Dichtungsnut und an dem Befestigungsflansch des anderen Gehäuseteiles einen in die Dichtungsnut hineinragenden umlaufenden Dichtungssteg auf, der mit Presssitz in die Dichtungsnut eingesteckt ist, wobei die Steckachse annähernd senkrecht zu der Kraftachse der Presskraft steht. Durch den Presssitz des Dichtungssteges in der Dichtungsnut wird die Flanschdichtung flüssigkeitsdicht und druckdicht abgedichtet. Die eigentliche Dichtung erfolgt also nicht mehr in der Ebene der einander gegenüberstehenden Flanschflächen, sondern erfolgt in der Dichtungsnut. Die Kraft, mit der die Abdichtung generiert oder unterstützt wird, ist also nicht abhängig von der eigentlichen Verbindung der beiden Gehäuseteile bzw. der beiden Befestigungsflansche miteinander. Die Verbindung der Befestigungsflansche miteinander hat keine unmittelbare Wirkung auf die Qualität der Abdichtung, da die die Abdichtungsqualität bestimmende Presskraft unabhängig ist von der Verbindungskraft der Flanschverbindung. Die Presskraft, die zwischen dem Dichtungssteg und der Dichtungsnut vorliegt, ist nahezu unabhängig von der Flanschverbindung. Auf diese Weise wird eine langlebige und zuverlässige, flüssigkeitsdichte und druckdichte Verbindung der beiden Gehäuseteile miteinander realisiert. Die Dichtung ist relativ unempfindlich gegenüber äußeren Beschädigungen und Verformungen des Gehäuses, der Befestigungsflansche bzw. der VerbindungsMittel.The internal combustion engine radiator according to the invention has on the mounting flange of a housing part a circumferential sealing groove and on the mounting flange of the other housing part in the sealing groove projecting circumferential sealing web, which is inserted with interference fit in the sealing groove, wherein the plug axis approximately perpendicular to the force axis of the pressing force stands. Due to the press fit of the sealing web in the sealing groove, the flange seal is sealed liquid-tight and pressure-tight. The actual seal is therefore no longer in the plane of the opposing flange surfaces, but takes place in the seal groove. The force with which the seal is generated or supported is therefore not dependent on the actual connection of the two housing parts or the two mounting flanges together. The connection of the mounting flanges together has no immediate effect on the quality of the seal, since the sealing quality determining pressing force is independent of the connection force of the flange connection. The pressing force, which is present between the sealing web and the sealing groove, is almost independent of the flange connection. In this way, a durable and reliable, liquid-tight and pressure-tight connection of the two housing parts is realized together. The seal is relatively insensitive to external damage and deformation of the housing, the mounting flanges or the connecting means.

Gemäß einer bevorzugten Ausgestaltung weist der Dichtungssteg einen steifen Stegkörper und eine verformbare Dichtlippe auf, wobei die Stegkörper-Weite geringer als die Dichtungs-Weite ist, und die Dichtlippe auf einer der beiden Stegkörperseiten derart angeordnet ist, dass die Dichtungsstegweite bei entspannter Dichtlippe größer als die Nutweite ist. Der Dichtungssteg besteht also im Wesentlichen aus zwei Teilen, nämlich dem steifen Stegkörper und der verformbaren Dichtlippe. Die Dichtlippe ist über den gesamten Verlauf des Stegkörpers durchgehend umlaufend. Die Dichtlippe ist an mindestens einer Seite des Stegkörpers angeordnet, es kann jedoch an jeder der beiden Seiten des Stegkörpers jeweils eine umlaufende Dichtlippe vorgesehen sein. Die Dichtlippe wird beim Einschieben des Dichtungssteges in die Dichtungsnut derart verformt, dass der Dichtungssteg als Ganzes in die Dichtungsnut eingesteckt werden kann. Der Stegkörper besteht aus einem Material, das insbesondere eine hohe Dauerfestigkeit und Stabilität aufweist. Die separate Dichtlippe hingegen ist auf eine lang andauernde Elastizität ausgelegt, die langfristig eine zuverlässige Abdichtung sicherstellt.According to a preferred embodiment, the sealing web on a rigid web body and a deformable sealing lip, wherein the web body width is less than the seal width, and the sealing lip is arranged on one of the two web body sides such that the seal web width is greater than the groove width with a relaxed sealing lip. The sealing web thus consists essentially of two parts, namely the rigid web body and the deformable sealing lip. The sealing lip is continuously circulating over the entire course of the web body. The sealing lip is arranged on at least one side of the web body, but it can be provided on each of the two sides of the web body each have a circumferential sealing lip. The sealing lip is deformed during insertion of the sealing web in the sealing groove such that the sealing web can be inserted as a whole in the sealing groove. The web body is made of a material which in particular has a high fatigue strength and stability. The separate sealing lip, however, is designed for a long-lasting elasticity, which ensures a reliable seal in the long term.

Gemäß einer bevorzugten Ausgestaltung ist die Dichtlippe elastisch verformbar. Die Dichtlippe besteht beispielsweise aus Gummi und/oder aus einem elastisch verformbaren Kunststoff.According to a preferred embodiment, the sealing lip is elastically deformable. The sealing lip consists for example of rubber and / or of an elastically deformable plastic.

Gemäß einer bevorzugten Ausgestaltung ist die Dichtlippe formschlüssig an dem Stegkörper befestigt. Beispielsweise kann die Dichtlippe hinterschnittene Haltefinger aufweisen, die in entsprechende Halteöffnungen des Stegkörpers eingesteckt sind. Auf diese Weise ist eine einfache und schnelle Montage der Dichtlippe an den Stegkörper möglich. Alternativ oder ergänzend kann die Dichtlippe an dem Stegkörper auch auf andere Weise fixiert werden, beispielsweise durch Verkleben oder Verschweißen.According to a preferred embodiment, the sealing lip is positively secured to the web body. For example, the sealing lip may have undercut retaining fingers, which are inserted into corresponding retaining openings of the web body. In this way, a simple and quick installation of the sealing lip on the web body is possible. Alternatively or additionally, the sealing lip can be fixed to the web body in other ways, for example by gluing or welding.

Gemäß einer bevorzugten Ausgestaltung wird die Verbindung der beiden Gehäuseteile durch die beiden Befestigungsflansche umfassende Halteklammern gebildet. Diese Verbindungstechnik macht den Zusammenbau einfach und preiswert. Da die Abdichtung nicht mehr unmittelbar durch die aufeinander liegenden Befestigungsflansche gewährleistet wird, sondern durch die Anordnung, bestehend aus dem Dichtungssteg und der Dichtungsnut, sind an die Flanschverbindung keine sehr hohenAccording to a preferred embodiment, the connection of the two housing parts is formed by the two mounting flanges comprehensive retaining clips. This connection technology makes the assembly easy and inexpensive. Since the seal is no longer guaranteed directly by the superimposed mounting flanges, but by the arrangement consisting of the sealing web and the sealing groove, are not very high on the flange

Anforderungen mehr zu stellen. Durch die erfindungsgemäße Dichtung können einfachere und preiswertere Verbindungstechniken zum Verbinden der Befestigungsflansche der beiden Gehäuseteile eingesetzt werden.To demand more. The inventive seal simpler and cheaper connection techniques for connecting the mounting flanges of the two housing parts can be used.

Vorzugsweise besteht ein Gehäuseteil aus Aluminium und besteht das andere Gehäuseteil aus Kunststoff. Diese Kombination ist bei zeitgemäßen Verbrennungsmotor-Kühlern häufig anzutreffen. Aluminium hat hervorragende Wärmeleit-Eigenschaften und Kunststoff ist preiswert verfügbar, in komplexe Formen zu bringen und von geringem Gewicht.Preferably, a housing part made of aluminum and the other housing part made of plastic. This combination is common in contemporary engine coolers. Aluminum has excellent thermal conductivity properties and plastic is inexpensive, available in complex shapes and lightweight.

Gemäß einer bevorzugten Ausgestaltung ist der eine Gehäuseteil der eigentliche Wärmetauscher des Kühlers und ist der zweite Gehäuseteil eine Wassermantelschale an einem bzw. an beiden Längsenden des Wärmetauschers, wie es beispielsweise aus DE 2923857 A bekannt ist.According to a preferred embodiment of a housing part of the actual heat exchanger of the radiator and the second housing part is a water jacket shell at one or at both longitudinal ends of the heat exchanger, as for example DE 2923857 A is known.

Im Folgenden werden unter Bezugnahme auf die Zeichnungen mehrere Ausführungsbeispiele der Erfindung näher erläutert.In the following several embodiments of the invention will be explained in more detail with reference to the drawings.

Es zeigen:

  • Figur 1 eine Schnittdarstellung eines Abschnittes eines erfindungsgemäßen Verbrennungsmotor-Kühlers,
  • Figur 2 eine vergrößerte Darstellung eines Dichtungssteges des Kühlers der Figur 1,
  • Figur 3 eine zweite Ausführungsform eines Dichtungssteges mit einer zweiten Ausführungsform einer Dichtlippe, und
  • Figur 4 eine weitere Ausführungsform einer Dichtlippe.
Show it:
  • FIG. 1 a sectional view of a portion of an internal combustion engine radiator according to the invention,
  • FIG. 2 an enlarged view of a sealing web of the radiator of FIG. 1 .
  • FIG. 3 a second embodiment of a sealing web with a second embodiment of a sealing lip, and
  • FIG. 4 a further embodiment of a sealing lip.

In der Figur 1 ist im Querschnitt ein Teil eines Verbrennungsmotor-Kühlers 10 zum Kühlen eines flüssigen Kühlmittels dargestellt. Derartige Kühler werden beispielsweise in Kraftfahrzeugen eingesetzt. Als Kühlmittel dient bevorzugt Wasser, das innerhalb des den Kühler 10 umfassenden Kühlkreislaufes unter Überdruck steht, so dass der Siedepunkt des Wassers über 100 °C liegt.In the FIG. 1 is shown in cross section a part of an internal combustion engine radiator 10 for cooling a liquid coolant. Such coolers are used for example in motor vehicles. The coolant used is preferably water, that is within the cooling circuit comprising the radiator 10 under pressure, so that the boiling point of the water is above 100 ° C.

Der Kühler 10 besteht im Wesentlichen aus zwei oder mehr Gehäuseteilen 12, 14, die zu dem Kühler zusammengebaut sind. Vorliegend sind ein erstes Gehäuseteil 12, das ein Aluminium-Wärmetauscher ist, und ein zweites Gehäuseteil 14, das eine Kunststoff-Wassermantelschale bildet, dargestellt. Der Kühler 10 kann weitere Gehäuseteile aufweisen, die in der Figur 1 der Einfachheit halber weggelassen sind. Die Gehäuseteile 12, 14 bilden ein flüssigkeitsdichtes und druckdichtes Kühlmittelgehäuse 11.The radiator 10 consists essentially of two or more housing parts 12, 14, which are assembled to the radiator. In the present case, a first housing part 12, which is an aluminum heat exchanger, and a second housing part 14, which forms a plastic water jacket shell, are shown. The cooler 10 may comprise further housing parts, which in the FIG. 1 have been omitted for simplicity. The housing parts 12, 14 form a liquid-tight and pressure-tight coolant housing 11.

Zur Fixierung der beiden Gehäuseteile 12, 14 miteinander ist eine mechanische Verbindung 15 vorgesehen, die die Befestigungsflansche 30, 32 des ersten und des zweiten Gehäuseteiles 12, 14 fest miteinander verbindet. Die Gehäuseteil-Befestigungsflansche 30, 32 weisen jeweils einander zugewandte zueinander parallele Stützflächen 31, 33 auf, die aufeinander liegen.For fixing the two housing parts 12, 14 with each other, a mechanical connection 15 is provided, which connects the mounting flanges 30, 32 of the first and second housing part 12, 14 firmly together. The housing part mounting flanges 30, 32 each have mutually facing mutually parallel support surfaces 31, 33 which lie on one another.

Die beiden Befestigungsflansche 30, 32, der beiden Gehäuseteile 12, 14, werden durch eine mechanische Verbindung 15 in Form einer Vielzahl von Metall-Halteklammern 16 zusammen gehalten. Die Halteklammern 16 weisen Widerhaken 67 auf, die in entsprechende Halteöffnungen 69 der Befestigungsflansche 30, 32, eingreifen. Mit den Halteklammern 16 wird eine einfache mechanische Verbindung 15 der beiden Befestigungsflansche 30, 32, realisiert.The two mounting flanges 30, 32, the two housing parts 12, 14 are held together by a mechanical connection 15 in the form of a plurality of metal retaining clips 16. The retaining clips 16 have barbs 67, which engage in corresponding retaining openings 69 of the mounting flanges 30, 32. With the retaining clips 16, a simple mechanical connection 15 of the two mounting flanges 30, 32, realized.

Der Befestigungsflansch 30 des einen Gehäuseteils 12 weist eine umlaufende Dichtungsnut 17 auf, in die ein Dichtungssteg 20 des anderen Gehäuseteiles 14 hineinragt. Der Dichtungssteg 20 ragt von dem betreffenden Befestigungsflansch 32 ab und ist derart ausgebildet, dass er mit Presssitz in die Dichtungsnut 17 eingesteckt ist.The mounting flange 30 of a housing part 12 has a circumferential sealing groove 17 into which a sealing web 20 of the other housing part 14 protrudes. The sealing web 20 protrudes from the respective mounting flange 32 and is designed such that it is inserted with a press fit into the sealing groove 17.

Der Dichtungssteg 20 der Figur 1 ist in der Figur 2 vergrößert dargestellt. Der Dichtungssteg 20 weist einen steifen Stegkörper 22 und eine verformbare Dichtlippe 18 auf. Die Weite S des Stegkörpers 22 ist geringer als die Weite D der Dichtungsnut 17. Die Dichtungssteg-Weite G bei entspannter Dichtlippe 18, wie sie in Figur 2 dargestellt ist, ist größer als die Dichtungsnut-Weite D.The sealing web 20 of the FIG. 1 is in the FIG. 2 shown enlarged. The sealing web 20 has a stiff web body 22 and a deformable sealing lip 18. The width S of the web body 22 is less than the width D of Sealing groove 17. The seal web width G with the sealing lip 18 relaxed, as in FIG. 2 is greater than the seal groove width D.

Die Dichtlippe 18 ist elastisch verformbar, und besteht beispielsweise aus Gummi oder aus einem elastischen Kunststoff. Die Dichtlippe 18 ist formschlüssig an dem Stegkörper 22 befestigt. Hierzu weist die Dichtlippe 18 hinterschnittene Haltefinger 60; 61 auf, die in entsprechenden Halteöffnungen 64; 66, des Stegkörpers 22; 22' stecken. Die Haltefinger 60; 61 sind annähernd T-förmig ausgebildet. Die Haltefinger 60; 61 bestehen jeweils aus einem Verbindungsstift 26; 46 und einem Querbalken 28; 48. Der Querbalken 28 kann als einfacher Balken ausgebildet sein, wie in den Figuren 1 - 3 dargestellt, der Querbalken 48 kann jedoch auch beispielsweise schwalbenschwanzförmig ausgebildet sein, wie in Figur 4 dargestellt. Während der Dichtlippen-Körper 24; 44; 52 jeweils über den gesamten Flansch-Umfang durchgehend ist, sind die Haltefinger 60; 61 über die gesamte Länge des Dichtlippen-Köpers 24 vereinzelt angeordnet, beispielsweise alle 10 mm. Der Dichtlippen-Körper 24 ist im Querschnitt halbkreisförmig.The sealing lip 18 is elastically deformable, and consists for example of rubber or of an elastic plastic. The sealing lip 18 is positively secured to the web body 22. For this purpose, the sealing lip 18 undercut retaining fingers 60; 61, which in corresponding holding openings 64; 66, the web body 22; 22 'stuck. The retaining fingers 60; 61 are formed approximately T-shaped. The retaining fingers 60; 61 each consist of a connecting pin 26; 46 and a crossbar 28; 48. The crossbar 28 may be formed as a simple beam, as in the Figures 1 - 3 However, the cross bar 48 may also be formed, for example dovetail-shaped, as in FIG. 4 shown. While the sealing lip body 24; 44; 52 is continuous over the entire flange circumference, the retaining fingers 60; 61 arranged singly over the entire length of the sealing lip body 24, for example, every 10 mm. The sealing lip body 24 is semicircular in cross section.

Die Dichtlippe 18 kann in einer entsprechenden Haltenut 70 des Stegkörpers 22 sitzen, um den Dichtlippen-Körper 24 in Bezug auf die Steckrichtung in der Lage zu fixieren. Zur Aufnahme der Haltefinger 60; 61 sind mehrere Halteöffnungen 64; 66 in den Stegkörper 22; 22' vorgesehen, in die die Haltefinger 60; 61 eingesteckt bzw. eingespritzt sind.The sealing lip 18 may sit in a corresponding retaining groove 70 of the web body 22 to fix the sealing lip body 24 in position with respect to the plugging direction. For receiving the retaining fingers 60; 61 are a plurality of holding openings 64; 66 in the web body 22; 22 ', in which the retaining fingers 60; 61 are inserted or injected.

Der Dichtungssteg 20 sitzt mit Presssitz derart in der Dichtungsnut 17, dass seine Steckachse 21 annähernd senkrecht zur Kraftachse 23 der Presskraft steht. Die Steckachse 21 ist die Achse, in der der Dichtungssteg 20 in die Dichtungsnut 17 eingeführt wird. Die Kraftachse 23 der Presskraft ist die Achse, in der die Federkraft der Dichtlippe 18 im Wesentlichen wirkt. Da diese Presskraft zwischen den beiden Nutwänden der Dichtungsnut 17 aufgebracht wird, ist jederzeit für eine ausreichende Dichtung gesorgt, selbst dann, wenn die mechanische Flansch-Verbindung 15 an einer Stelle geschwächt ist, beispielsweise durch das Fehlen einer Halteklammer 16. Die Dichtungsqualität der flüssigkeits- und druckdichten Abdichtung ist nicht abhängig von der Qualität der mechanischen Verbindung 15, sondern weitgehend unabhängig davon.The sealing web 20 is seated with an interference fit in the sealing groove 17 such that its plug-in axis 21 is approximately perpendicular to the force axis 23 of the pressing force. The plug-in axis 21 is the axis in which the sealing web 20 is inserted into the sealing groove 17. The force axis 23 of the pressing force is the axis in which the spring force of the sealing lip 18 substantially acts. Since this pressing force is applied between the two groove walls of the sealing groove 17, a sufficient seal is provided at all times, even if the mechanical flange connection 15 is weakened in one place, for example by the absence of a retaining clip 16. The sealing quality of the liquid and pressure-tight sealing is not depending on the quality of the mechanical connection 15, but largely independent of it.

Bei dem in der Figur 3 dargestellten Ausführungsbeispiel eines Dichtungssteges 20' ist die Dichtlippe 42 gegenüber dem in den Figuren 1 und 2 dargestellten Ausführungsbeispiel variiert. Die Dichtlippe 42 weist einen im Querschnitt rechteckigen Dichtlippen-Körper 44 auf, der auf dem nutfreien Stegkörper 22' aufliegt.In the in the FIG. 3 illustrated embodiment of a sealing web 20 'is the sealing lip 42 relative to the in the Figures 1 and 2 illustrated embodiment varies. The sealing lip 42 has a rectangular cross-section sealing lip body 44 which rests on the groove-free web body 22 '.

Bei dem in Figur 4 dargestellten Ausführungsbeispiel einer Dichtlippe 50 weist der Dichtlippen-Körper 52 drei zueinander parallele Lippenstege 54 auf. Hierdurch wird auch bei einer Beschädigung des Dichtlippen-Körpers 52 weitgehend sichergestellt, dass eine flüssigkeitsdichte und druckdichte Abdichtung erhalten bleibt.At the in FIG. 4 illustrated embodiment of a sealing lip 50, the sealing lip body 52 has three mutually parallel lip webs 54. As a result, even if the sealing lip body 52 is damaged, it is largely ensured that a liquid-tight and pressure-tight seal is maintained.

Claims (8)

  1. A cooler (10) for an internal combustion engine for cooling a liquid coolant, comprising
    a coolant housing (11) comprising a first housing part (12) and a second housing part (14) joined to the first housing part (12) in a liquid- and pressure-tight manner,
    wherein a mechanical connecting means (15) connects fastening flanges (30, 32) of the first and second housing parts (12, 14) with each other,
    characterized in that
    one fastening flange (30) is associated with a circumferential sealing groove (17) and the other fastening flange (32) is associated with a sealing web (20) projecting into the sealing groove (17), wherein the web is inserted into the sealing groove (17) with a press fit, the insertion axis (21) being approximately perpendicular to the force axis (23) of the pressing force.
  2. A cooler (10) for an internal combustion engine for cooling a liquid coolant of claim 1, wherein the sealing web (20) comprises a rigid web body (22; 22') and a deformable sealing lip (18; 42; 50) and the bar body width S is smaller than the sealing groove width D, and the sealing lip (18; 42; 50) is arranged on one of both web body sides such that the sealing ring width G is larger than the sealing groove width D when the sealing lip (18; 42; 50) is in its relaxed state.
  3. A cooler (10) for an internal combustion engine for cooling a liquid coolant of claim 1 or 2, wherein the sealing lip (18; 42; 50) is elastically deformable.
  4. A cooler (10) for an internal combustion engine for cooling a liquid coolant of one of claims 1-3, wherein the sealing lip (18; 42; 50) is fastened to the web body (22; 22') with a positive fit.
  5. A cooler (10) for an internal combustion engine for cooling a liquid coolant of one of claims 1-4, wherein the sealing lip (18; 42; 50) comprises a plurality of undercut retaining fingers (60; 61) set into corresponding retaining openings (64; 65) of the web body (22; 22').
  6. A cooler (10) for an internal combustion engine for cooling a liquid coolant of one of claims 1-5, wherein the connecting means (15) is formed by retaining clamps (16) embracing the fastening flanges (30; 32).
  7. A cooler (10) for an internal combustion engine for cooling a liquid coolant of one of claims 1-6, wherein one housing part (12) is made of aluminum and the other housing part (14) is made of plastics.
  8. A cooler (10) for an internal combustion engine for cooling a liquid coolant of one of claims 1-7, wherein the first housing part (12) is a heat exchanger and the second housing part (14) is a water jacket shell.
EP08170044A 2008-01-18 2008-11-27 Combustion engine cooler Not-in-force EP2080979B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008005095A DE102008005095B4 (en) 2008-01-18 2008-01-18 Engine cooler

Publications (2)

Publication Number Publication Date
EP2080979A1 EP2080979A1 (en) 2009-07-22
EP2080979B1 true EP2080979B1 (en) 2011-04-20

Family

ID=40510495

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08170044A Not-in-force EP2080979B1 (en) 2008-01-18 2008-11-27 Combustion engine cooler

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EP (1) EP2080979B1 (en)
AT (1) ATE506584T1 (en)
DE (2) DE102008005095B4 (en)

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3201156A (en) * 1960-11-07 1965-08-17 John N Coats Pipe coupling having clamping force adjusting means
GB2025023B (en) 1978-06-15 1983-01-19 Ferodo Sa Expansion tank and header box arrangement for a tubular heat exchanger such as a motor vehicle radiator
DE2923486C2 (en) * 1979-06-09 1982-08-26 Goetze Ag, 5093 Burscheid Flat gasket, especially cylinder head gasket
FR2579311A1 (en) * 1985-03-20 1986-09-26 Valeo Heat exchanger for a motor vehicle, in particular of the exhaust gas type
DE3544588A1 (en) * 1985-12-17 1987-06-25 Bruss Dichtungstechnik Elastomeric seal for heat exchangers
US5050764A (en) * 1990-03-08 1991-09-24 Pacesetter Infusion, Ltd. Lateral compression sealing system and method of making seal
DE4243495C5 (en) * 1992-12-22 2010-02-18 Behr Gmbh & Co. Kg Elastomeric seal for heat exchangers
GB2292451B (en) * 1994-08-18 1998-04-01 Moulded Plastics Radiator header tank
FR2742530B1 (en) * 1995-12-13 1998-01-30 Valeo Thermique Moteur Sa DEVICE AND METHOD FOR ASSEMBLING A COLLECTOR PLATE AND A HEAT EXCHANGER WATER BOX
JPH11126648A (en) * 1997-10-21 1999-05-11 Yazaki Corp Packing holding structure
GB9802761D0 (en) * 1998-02-11 1998-04-08 Raychem Sa Nv Sealing arrangement
EP1415101B1 (en) * 2001-07-30 2005-10-26 Koninklijke Philips Electronics N.V. Appliance with seal between two housing shells
DE102005045103B3 (en) * 2005-09-21 2006-12-28 Pierburg Gmbh Exhaust gas cooling device for internal combustion engine, has heat transfer unit with pin-shaped ribs that protrude perpendicularly to mainstream direction of fluid from external housing in channel

Also Published As

Publication number Publication date
DE102008005095A1 (en) 2009-07-30
DE502008003264D1 (en) 2011-06-01
EP2080979A1 (en) 2009-07-22
DE102008005095B4 (en) 2011-10-20
ATE506584T1 (en) 2011-05-15

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