EP1989500B1 - Housing with rotating machine element and heat exchanger and production method - Google Patents

Housing with rotating machine element and heat exchanger and production method Download PDF

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Publication number
EP1989500B1
EP1989500B1 EP07702450.3A EP07702450A EP1989500B1 EP 1989500 B1 EP1989500 B1 EP 1989500B1 EP 07702450 A EP07702450 A EP 07702450A EP 1989500 B1 EP1989500 B1 EP 1989500B1
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EP
European Patent Office
Prior art keywords
flat tube
machine element
coolant
heat exchanger
rotating machine
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
EP07702450.3A
Other languages
German (de)
French (fr)
Other versions
EP1989500B8 (en
EP1989500A1 (en
Inventor
Viktor Brost
Rainer Käsinger
Ivo Agner
Oliver Nöhl
Johannes Arnold
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.)
Schaeffler Technologies AG and Co KG
Modine Manufacturing Co
Original Assignee
Schaeffler Technologies AG and Co KG
Modine Manufacturing Co
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Publication date
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Publication of EP1989500A1 publication Critical patent/EP1989500A1/en
Publication of EP1989500B1 publication Critical patent/EP1989500B1/en
Application granted granted Critical
Publication of EP1989500B8 publication Critical patent/EP1989500B8/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
    • F28D1/0471—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits having a non-circular cross-section
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D3/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium flows in a continuous film, or trickles freely, over the conduits
    • F28D3/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium flows in a continuous film, or trickles freely, over the conduits with tubular conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/126—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element consisting of zig-zag shaped fins
    • F28F1/128—Fins with openings, e.g. louvered fins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
    • F28F13/125—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation by stirring
    • 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
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/04—Lubricant cooler
    • 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
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D2001/0253—Particular components
    • F28D2001/026—Cores
    • F28D2001/0273—Cores having special shape, e.g. curved, annular
    • 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
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0049—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for lubricants, e.g. oil coolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/12—Fastening; Joining by methods involving deformation of the elements
    • F28F2275/122—Fastening; Joining by methods involving deformation of the elements by crimping, caulking or clinching
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2280/00—Mounting arrangements; Arrangements for facilitating assembling or disassembling of heat exchanger parts
    • 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

Definitions

  • the invention relates to a housing having a machine element arranged therein and a heat exchanger integrated therein, comprising at least one tube for heat exchange between a first coolant and a second coolant, which serves for cooling the rotating machine element. Moreover, the invention relates to a suitable manufacturing method.
  • annular heat exchangers serve to cool a first refrigerant flowing through the flat tubes thereof by means of cooling air blown by a fan or the like from inside to outside (or vice versa) by cooling fins arranged between the flat tubes.
  • the flat tubes have been bent over their narrow sides, so you can arrange a plurality of flat tubes side by side and install the fins or the cooling fins for the radially flowing cooling air therebetween.
  • One of many other examples was in the DE 37 21 257 C2 described.
  • a device for cooling an axle assembly which has a chamber formed by a housing with a first fluid contained therein. Within the chamber is a conduit which is flowed through by a second fluid. The line surrounds an axle drive device. The first fluid is cooled by means of the second fluid, whereby the two fluids can not mix.
  • Rotary machine elements may be, for example, clutches or brakes that have a cooling requirement. Addressed are, for example, those - often referred to as wet clutches - torque transmitting organs that run through a coolant sump, usually oil, and which spin off the coolant by their rotation. The coolant then runs, for example, on the housing wall back into the sump and can cool down there.
  • coolant sump usually oil
  • the object of the invention is to provide a housing with a rotating machine element and a heat exchanger integrated therein for cooling a coolant thrown by a rotating machine element, with which efficient cooling can be achieved. It should therefore be made a contribution to the fact that the power transmission could be increased by means of the machine element in a small space.
  • the solution according to the invention results from the features of claim 1.
  • the production method according to the invention is in claim 10.
  • the heat exchanger consists of at least one flat tube and at least one lamella and serves for heat exchange between a first coolant, which flows through the flat tube and a second coolant, which wets the heat exchanger under the influence of centrifugal forces.
  • the second coolant is thereby cooled and is available for further cooling of a rotating machine element, wherein the heat exchanger is approximately annular and is suitable to substantially surround the rotating machine element.
  • the at least one flat tube is formed bent over its broad sides, wherein the lamella is arranged on the inwardly facing broad side. It is the side wetted by the second coolant.
  • the bending of flat tubes over the broadsides is known to be easier to accomplish.
  • the broad sides of the flat tube are thus arranged approximately parallel to the axis of rotation of the machine element.
  • Such a trained and arranged heat exchanger allows active and effective cooling of the second coolant and thus makes both a contribution to increase the power transmission by means of the rotating machine element, as well as a contribution to the amount or space requirements of the second coolant at the same To be able to reduce performance.
  • the resulting in a larger power transmission larger, mainly caused by friction, heat loss amounts are effectively transferred to the first coolant and discharged.
  • the space requirement of the annular heat exchanger in the housing is relatively small.
  • the term "annular" in the sense of the present proposal should not only mean circular but rather encompass any contour course which is suitable for substantially surrounding the rotating machine element.
  • About half of the circumference of the machine element should be enclosed at least by the heat exchanger.
  • the heat exchanger extends around at least almost the entire circumference of the machine element and is integrated in the housing.
  • the lamella is provided with an apertured lining which extends approximately parallel to the broad side of the flat tube and covers the lamella. It is the cladding, for example, a metal strip. This increases the intensity of the heat exchange.
  • the openings are formed and arranged so that the second coolant can flow up to the lamella and up to the broad side of the flat tube and can flow out of the lamella again.
  • the coolant can also flow out on the narrow sides of the lamella or on their longitudinal edges, because the edges need not be covered by the cover. As a result, the residence time of the second coolant in the lamella or on the flat tube is extended, and it can be cooled more intensively.
  • the second coolant flows into a sump or the like collecting trough, in which it can be reached by the rotating machine element.
  • At least one end of the at least one flat tube has an end chamber for supplying or discharging the first coolant.
  • an end chamber is arranged at both ends of the at least one flat tube.
  • the at least one flat tube in which the first coolant flows is either a brazed or welded flat tube with an inner insert, or a flat tube produced by means of extrusion.
  • the lamella has a wave-like contour curve, with numerous staggered sections in the wave flanks, wherein the waveform is provided perpendicular or inclined to the direction of extrusion of the tube. Such fins are known in the field of "oil cooling" in and of itself. This blade cooperates with the panel described above.
  • the cladding is preferably a cover plate which is soldered together with the lamella and the tube.
  • Step a) may include attaching an apertured fairing to the sipe.
  • the end chambers can be connected together during assembly.
  • the Fig. 1 shows in principle the integration of the heat exchanger in the housing.
  • the Fig. 2 shows three sections of the heat exchanger with different pipes.
  • the Fig. 3 shows the annular heat exchanger in a perspective view.
  • the 4 and 5 show details in the area of the end chambers of the heat exchanger.
  • the Fig. 6 shows three possible arrangements of the lamella.
  • the Fig. 7 shows possible training of the panel.
  • the heat exchanger shown in the exemplary embodiment consists of a single flat tube 1 and a slat 2.
  • the flat tube 1 has been bent annularly about the broad sides 10, wherein a substantially annular configuration is shown in the embodiment, the mold design, however, can be almost arbitrarily adjustable.
  • a favorable production sequence of the heat exchanger provides that first a straight flat tube 1 is joined together with a lamella 2 .
  • the middle representation b should be an extruded multi-chamber tube and the right representation c is a flat tube with an inner web.
  • one end chamber 30 and one inlet stub 31 are attached to one end chamber 30 and one outlet stub 32 to the other end chamber 30 .
  • a single end chamber 30 could be provided with a partition wall at one end of the flat tube 1 .
  • the other end of the flat tube 1 would then be simply closed, in the flat tube then a way and a return path for the first coolant would be formed.
  • a blade 2 is applied to a broad side 10 of the flat tube 1 .
  • the cover strip 21 runs approximately parallel to the broad sides 10 of the flat tube 1, and it has numerous openings 20 .
  • the construction is then connected together in a brazing process. Thereafter, the construction is brought into the required shape substantially by means of bending, by means of a known stretch bending process.
  • the Fig. 3 shows a heat exchanger with approximately circular shape. The shape could also be oval or have heels, the stretch bending process is supplemented by appropriate steps to create the heels. (Not shown)
  • Fig. 1 was a section of the overall construction shown, from which a part of the housing 4 and also a part of the rotating machine element 3 can be seen.
  • the housing 4 surrounds the rotating machine element 3.
  • the heat exchanger has been inserted into the housing 4 and fastened.
  • the inlet and outlet ports 31, 32 for the first coolant can be connected outside the housing 4 with a hose connection or the like.
  • Also not shown was an oil sump into which the rotating machine element 3 is immersed.
  • the oil is the second coolant which cools the rotating machine element 3 . Due to the rotation, the oil is thrown away, resulting in the Fig. 1 should be indicated by means of only a few drops 12 .
  • the oil to be cooled flows through the openings 20 into the space in which the blade 2 is located, is cooled intensively and then flows back down into the sump, not shown
  • tabs 33 which can be connected together, so that a relatively stable heat exchanger construction is formed. More details show that 4 and 5 , The connection between the tabs 33 can be done for example by means of "clinching". Such compounds are known as so-called tox compounds in the art. Both tabs are on top of each other. Then the material located under the punch face is pressed into an undercut in the lower flap. Only two Tox - Points 35 were drawn. This connection method is simple, fast and reliable.
  • the Fig. 6 shows that as a corrugated fin 2 such from the field of oil cooling is used.
  • the arrangement of the waves runs in the horizontal direction.
  • the waves run vertically, ie in the extension direction of the flat tube 1.
  • the shaft running direction has been provided inclined by approximately 45 ° to the longitudinal direction. With such simple and inexpensive measures can be acted on the heat exchange in the desired manner.
  • the Fig. 7 shows three exemplary images, which differ by the shape and arrangement of the openings 20 . Also, the area ratio of the openings 20 to the rest of the panel 21 may be different. It is intended to cause the oil to remain in contact with the fin 2 and the flat tube 1 for a long time.

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

Description

Die Erfindung betrifft ein Gehäuse mit einem darin angeordneten Maschinenelement und einem darin integrierten Wärmetauscher bestehend aus wenigstens einem Rohr zum Wärmaustausch zwischen einem ersten Kühlmittel und einem zweiten Kühlmittel, das zur Kühlung des rotierenden Maschinenelements dient. Darüber hinaus betrifft die Erfindung ein geeignetes Herstellungsverfahren.The invention relates to a housing having a machine element arranged therein and a heat exchanger integrated therein, comprising at least one tube for heat exchange between a first coolant and a second coolant, which serves for cooling the rotating machine element. Moreover, the invention relates to a suitable manufacturing method.

Aus dem Stand der Technik sind zahlreiche Wärmetauscher bekannt, die oft auch ringförmig ausgebildet sind. Bel den meisten Anwendungen dienen ringförmige Wärmetauscher dazu, ein durch die Flachrohre desselben strömendes erstes Kühlmittel mittels Kühlluft zu kühlen, die von einem Ventilator oder dergleichen von innen nach außen (oder umgekehrt) durch zwischen den Flachrohren angeordnete Kühlrippen geblasen wird.Numerous heat exchangers are known from the prior art, which are often also annular. In most applications, annular heat exchangers serve to cool a first refrigerant flowing through the flat tubes thereof by means of cooling air blown by a fan or the like from inside to outside (or vice versa) by cooling fins arranged between the flat tubes.

Ebenfalls in den meisten Fällen sind die Flachrohre Ober ihre Schmalseiten gebogen worden, damit man mehrere Flachrohre nebeneinander anordnen und dazwischen die Lamellen oder die Kühlrippen für die radial strömende Kühlluft anbringen kann. Eines von zahlreichen weiteren Beispielen wurde in der DE 37 21 257 C2 beschrieben.Also in most cases, the flat tubes have been bent over their narrow sides, so you can arrange a plurality of flat tubes side by side and install the fins or the cooling fins for the radially flowing cooling air therebetween. One of many other examples was in the DE 37 21 257 C2 described.

Man hat aber auch schon einen ringförmigen Wärmetauscher vorgeschlagen, dessen Flachrohre über ihre Breitseiten gebogen wurden, was fertigungstechnisch einfacher auszuführen ist. In diesem Fall strömt die Kühlluft allerdings axial durch die zwischen den Flachrohren angeordneten Lamellen. Ein solches Beispiel kann der DE 3 104 945 , Fig. 4, entnommen werden.But it has also been proposed an annular heat exchanger, the flat tubes were bent over their broadsides, which is manufacturing technology easier to do. In this case, however, the cooling air flows axially through the arranged between the flat tubes fins. Such an example may be the DE 3 104 945 . Fig. 4 , are taken.

Aus der WO 98/27367 A1 ist eine Vorrichtung zum Kühlen einer Achsanordnung bekannt, die eine von einem Gehäuse gebildete Kammer mit einem ersten darin enthaltenen Fluid aufweist. Innerhalb der Kammer befindet sich eine Leitung, welche von einem zweiten Fluid durchströmt wird. Die Leitung umgibt dabei eine Achsantriebsvorrichtung. Das erste Fluid wird mittels des zweiten Fluids gekühlt, wobei sich die beiden Fluide nicht vermischen können.From the WO 98/27367 A1 For example, a device for cooling an axle assembly is known which has a chamber formed by a housing with a first fluid contained therein. Within the chamber is a conduit which is flowed through by a second fluid. The line surrounds an axle drive device. The first fluid is cooled by means of the second fluid, whereby the two fluids can not mix.

Oftmals hat man ringförmige Wärmetauscher mir runden oder leicht ovalen Rohren ausgerüstet, die sich einfacher biegen lassen als Flachrohre. Die Lamellen sind dort gewöhnlich Flachrippen, die Öffnungen besitzen, durch die hindurch die Rohre vor dem Biegen gesteckt worden sind. Bei runden Rohren sind die am Wärmetausch beteiligten Flächen kleiner als bei flachen Rohren, weshalb sich der Wirkungsgrad verschlechtert.Often one has equipped ring-shaped heat exchangers with round or slightly oval tubes, which are easier to bend than flat tubes. The fins are there usually flat ribs, which have openings through which the pipes have been inserted before bending. In round tubes, the areas involved in the heat exchange are smaller than in flat tubes, which is why the efficiency deteriorates.

Rotierende Maschinenelemente können beispielsweise Kupplungen oder Bremsen sein, die einen Kühlbedarf haben. Angesprochen sind beispielsweise solche - häufig als Nasskupplungen bezeichneten - Drehmomentübertragungsorgane, die durch einen Kühlmittelsumpf, meistens Öl, laufen und die durch ihre Rotation das Kühlmittel wegschleudern. Das Kühlmittel läuft dann beispielsweise an der Gehäusewand zurück in den Sumpf und kann sich dort abkühlen. Es gibt auch auf diesem Gebiet zahlreiche Veröffentlichungen.Rotary machine elements may be, for example, clutches or brakes that have a cooling requirement. Addressed are, for example, those - often referred to as wet clutches - torque transmitting organs that run through a coolant sump, usually oil, and which spin off the coolant by their rotation. The coolant then runs, for example, on the housing wall back into the sump and can cool down there. There are also numerous publications in this field.

Die Aufgabe der Erfindung besteht darin, ein Gehäuse mit einem darin angeordneten rotierenden Maschinenelement und einem darin integrierten Wärmetauscher zur Kühlung eines von einem rotierenden Maschinenelement weggeschleuderten Kühlmittels zur Verfügung zu stellen, mit dem eine effiziente Kühlung erreicht werden kann. Es soll demnach ein Beitrag dazu geleistet werden, dass die Leistungsübertragung mittels des Maschinenelements bei kleinem Bauraum gesteigert werden könnte.The object of the invention is to provide a housing with a rotating machine element and a heat exchanger integrated therein for cooling a coolant thrown by a rotating machine element, with which efficient cooling can be achieved. It should therefore be made a contribution to the fact that the power transmission could be increased by means of the machine element in a small space.

Die erfindungsgemäße Lösung ergibt sich aus den Merkmalen des Anspruchs 1. Das erfindungsgemäße Herstellungsverfahren befindet sich im Anspruch 10.The solution according to the invention results from the features of claim 1. The production method according to the invention is in claim 10.

Der Wärmetauscher besteht aus wenigstens einem Flachrohr und aus wenigstens einer Lamelle und dient zum Wärmeaustausch zwischen einem ersten Kühlmittel, welches durch das Flachrohr strömt und einem zweiten Kühlmittel, welches unter Einwirkung von Fliehkräften den Wärmetauscher benetzt. Das zweite Kühlmittel wird dadurch gekühlt und steht zur weiteren Kühlung eines rotierenden Maschinenelements zur Verfügung, wobei der Wärmetauscher etwa ringförmig ausgebildet ist und geeignet ist, das rotierende Maschinenelement im Wesentlichen zu umgeben. Das wenigstens eine Flachrohr ist dabei über seine Breitseiten gebogen ausgebildet ist, wobei an der nach innen weisenden Breitseite die Lamelle angeordnet ist. Es handelt sich dabei um die Seite, die von dem zweiten Kühlmittel benetzt wird. Das Biegen von Flachrohren über die Breitseiten ist bekanntlich einfacher zu bewerkstelligen. Die Breitseiten des Flachrohrs sind somit etwa parallel zur Rotationsachse des Maschinenelements angeordnet.The heat exchanger consists of at least one flat tube and at least one lamella and serves for heat exchange between a first coolant, which flows through the flat tube and a second coolant, which wets the heat exchanger under the influence of centrifugal forces. The second coolant is thereby cooled and is available for further cooling of a rotating machine element, wherein the heat exchanger is approximately annular and is suitable to substantially surround the rotating machine element. The at least one flat tube is formed bent over its broad sides, wherein the lamella is arranged on the inwardly facing broad side. It is the side wetted by the second coolant. The bending of flat tubes over the broadsides is known to be easier to accomplish. The broad sides of the flat tube are thus arranged approximately parallel to the axis of rotation of the machine element.

Es ist ohne weiteres möglich, mehrere nebeneinander liegende über die Breitseiten gebogene Flachrohre einzusetzen.It is readily possible to use several adjacent flat tubes bent over the broad sides.

Es ist auch möglich, eines oder mehrere Flachrohre mit in den Abständen zwischen den Flachrohren angeordnete Rippen einzusetzen, wobei die Flachrohre über ihre Schmalseiten gebogen sind.It is also possible to use one or more flat tubes with arranged in the spaces between the flat tubes ribs, wherein the flat tubes are bent over their narrow sides.

Ein solchermaßen ausgebildeter und angeordneter Wärmetauscher ermöglicht eine aktive und effektive Kühlung des zweiten Kühlmittels und leistet somit sowohl einen Beitrag, um die Leistungsübertragung mittels des rotierenden Maschinenelements steigern zu können, als auch einen Beitrag, um die Menge bzw. den Raumbedarf des zweiten Kühlmittels bei gleicher Leistung reduzieren zu können. Die bei einer größeren Leistungsübertragung anfallenden größeren, hauptsächlich durch Reibung hervorgerufenen, Verlustwärmemengen werden wirksam auf das erste Kühlmittel übertragen und abgeführt. Der Raumbedarf des ringförmigen Wärmetauschers im Gehäuse ist relativ klein. Der Ausdruck "ringförmig" soll im Sinne des vorliegenden Vorschlags nicht nur kreisförmig bedeuten sondern vielmehr jeden Konturverlauf umfassen, der geeignet ist, das rotierende Maschinenelement im Wesentlichen zu umgeben. Etwa die Hälfte des Umfangs des Maschinenelements sollte mindestens von dem Wärmetauscher eingefasst sein. Vorzugsweise erstreckt sich der Wärmetauscher jedoch um wenigstens nahezu den gesamten Umfang des Maschinenelements und ist in dessen Gehäuse integriert.Such a trained and arranged heat exchanger allows active and effective cooling of the second coolant and thus makes both a contribution to increase the power transmission by means of the rotating machine element, as well as a contribution to the amount or space requirements of the second coolant at the same To be able to reduce performance. The resulting in a larger power transmission larger, mainly caused by friction, heat loss amounts are effectively transferred to the first coolant and discharged. The space requirement of the annular heat exchanger in the housing is relatively small. The term "annular" in the sense of the present proposal should not only mean circular but rather encompass any contour course which is suitable for substantially surrounding the rotating machine element. About half of the circumference of the machine element should be enclosed at least by the heat exchanger. Preferably, however, the heat exchanger extends around at least almost the entire circumference of the machine element and is integrated in the housing.

Nach einem anderen Aspekt wird vorgesehen, dass die Lamelle mit einer mit Öffnungen versehenen Verkleidung versehen ist, die sich etwa parallel zur Breitseite des Flachrohres erstreckt und die Lamelle abdeckt. Es handelt sich bei der Verkleidung beispielsweise um einen Blechstreifen. Damit wird die Intensität des Wärmetausches gesteigert.According to another aspect, it is provided that the lamella is provided with an apertured lining which extends approximately parallel to the broad side of the flat tube and covers the lamella. It is the cladding, for example, a metal strip. This increases the intensity of the heat exchange.

Die Öffnungen sind so ausgebildet und angeordnet, dass das zweite Kühlmittel bis an die Lamelle und bis an die Breitseite des Flachrohres strömen und wieder aus der Lamelle herausströmen kann. Das Kühlmittel kann auch an den Schmalseiten der Lamelle bzw. an deren Längsränder herausströmen, denn die Ränder müssen nicht von der Abdeckung umfasst sein. Dadurch wird die Verweilzeit des zweiten Kühlmittels in der Lamelle bzw. am Flachrohr verlängert, und es kann Intensiver gekühlt werden.The openings are formed and arranged so that the second coolant can flow up to the lamella and up to the broad side of the flat tube and can flow out of the lamella again. The coolant can also flow out on the narrow sides of the lamella or on their longitudinal edges, because the edges need not be covered by the cover. As a result, the residence time of the second coolant in the lamella or on the flat tube is extended, and it can be cooled more intensively.

Das zweite Kühlmittel strömt in einen Sumpf oder dergleichen Auffangwanne, in der es von dem rotierenden Maschinenelement erreichbar ist.The second coolant flows into a sump or the like collecting trough, in which it can be reached by the rotating machine element.

An wenigstens einem Ende des wenigstens einen Flachrohrs ist eine Endkammer zur Zu - bzw. Abführung des ersten Kühlmittels angeordnet.At least one end of the at least one flat tube has an end chamber for supplying or discharging the first coolant.

Vorzugsweise ist an beiden Enden des wenigstens einen Flachrohrs eine Endkammer angeordnet.Preferably, an end chamber is arranged at both ends of the at least one flat tube.

Es ist darüber hinaus ebenfalls von Vorteil, wenn an wenigstens einer der Endkammern Laschen oder dergleichen Verbindungselemente angeordnet sind, um beide Endkammern miteinander zu verbinden.It is also also advantageous if at least one of the end chambers tabs or the like connecting elements are arranged to connect the two end chambers together.

Es ist herstellungsmäßig günstig, wenn das mindestens eine Flachrohr, in dem das erste Kühlmittel strömt, entweder ein gelötetes bzw. geschweißtes Flachrohr mit einem Inneneinsatz ist, oder ein mittels Strangpressverfahren hergestelltes Flachrohr. Die Lamelle weist einen wellenartigen Konturverlauf auf, mit zahlreichen versetzt angeordneten Schnitten in den Wellenflanken, wobei der Wellenverlauf senkrecht oder geneigt zur Ersteckungsrichtung des Rohres vorgesehen ist. Solche Lamellen sind aus dem Bereich "Ölkühlung" an und für sich bekannt. Diese Lamelle wirkt mit der oben beschriebenen Verkleidung zusammen. Die Verkleidung ist vorzugsweise ein Abdeckblech welches gemeinsam mit der Lamelle und dem Rohr verlötet wird.It is favorable in terms of production if the at least one flat tube in which the first coolant flows is either a brazed or welded flat tube with an inner insert, or a flat tube produced by means of extrusion. The lamella has a wave-like contour curve, with numerous staggered sections in the wave flanks, wherein the waveform is provided perpendicular or inclined to the direction of extrusion of the tube. Such fins are known in the field of "oil cooling" in and of itself. This blade cooperates with the panel described above. The cladding is preferably a cover plate which is soldered together with the lamella and the tube.

Das Verfahren zur Herstellung des Gehäuses mit einem Maschinenelement und einem Wärmetauscher aus wenigstens einem flachen Rohr und wenigstens einer Lamelle weist folgende Verfahrensschritte auf:

  1. a) an die Breitseite des wenigstens einen flachen Rohres wird eine Lamelle angesetzt;
  2. b) Endkammern werden am Ende des flachen Rohres angebracht;
  3. c) die Teile werden metallisch verbunden;
  4. d) ein Biegevorgang wird ausgeführt, um einen ringförmigen Wärmetauscher zu erzeugen;
  5. e) der ringförmige Wärmetauscher wird in ein Gehäuse eingefügt, um das Kühlmittel eines rotierenden Maschinenelements zu kühlen.
The method for producing the housing with a machine element and a heat exchanger comprising at least one flat tube and at least one lamella has the following method steps:
  1. a) a lamella is attached to the broad side of the at least one flat tube;
  2. b) end chambers are attached to the end of the flat tube;
  3. c) the parts are connected metallically;
  4. d) a bending operation is carried out to produce an annular heat exchanger;
  5. e) the annular heat exchanger is inserted into a housing to cool the coolant of a rotating machine element.

Der Schritt a) kann das Ansetzen einer mit Öffnungen versehenen Verkleidung an die Lamelle umfassen.Step a) may include attaching an apertured fairing to the sipe.

Die Endkammern können im Zuge der Montage miteinander verbunden werden.The end chambers can be connected together during assembly.

Die Erfindung wird im Folgenden in einem Ausführungsbeispiel unter Bezugnahme auf die beigefügten Zeichnungen beschrieben. In dieser Beschreibung können weitere vorteilhafte Merkmale und Wirkungen enthalten sein.The invention will be described below in an embodiment with reference to the accompanying drawings. In this description, further advantageous features and effects may be included.

Die Fig. 1 zeigt prinzipiell die Integration des Wärmetauschers im Gehäuse. Die Fig. 2 zeigt drei Ausschnitte aus dem Wärmetauscher mit unterschiedlichen Rohren. Die Fig. 3 zeigt den ringförmigen Wärmetauscher in perspektivischer Darstellung. Die Fig. 4 und 5 zeigen Details im Bereich der Endkammern des Wärmetauschers. Die Fig. 6 zeigt drei mögliche Anordnungen der Lamelle. Die Fig. 7 zeigt mögliche Ausbildungen der Verkleidung.The Fig. 1 shows in principle the integration of the heat exchanger in the housing. The Fig. 2 shows three sections of the heat exchanger with different pipes. The Fig. 3 shows the annular heat exchanger in a perspective view. The 4 and 5 show details in the area of the end chambers of the heat exchanger. The Fig. 6 shows three possible arrangements of the lamella. The Fig. 7 shows possible training of the panel.

Der im Ausführungsbeispiel gezeigte Wärmetauscher besteht aus einem einzigen Flachrohr 1 und einer Lamelle 2. Das Flachrohr 1 wurde über die Breitseiten 10 ringförmig gebogen, wobei im Ausführungsbeispiel eine etwa kreisringförmige Gestaltung gezeigt ist, wobei die Formgestaltung allerdings nahezu beliebig anpassbar sein kann. Ein günstiger Herstellungsablauf des Wärmetauschers sieht vor, dass zunächst ein gerades Flachrohr 1 mit einer Lamelle 2 zusammengefügt wird. In dem Flachrohr 1 kann sich gemäß der linken Darstellung a in der Fig. 2 ein Inneneinsatz befinden. Die mittlere Darstellung b soll ein stranggepresstes Mehrkammerrohr sein und die rechte Darstellung c ist ein Flachrohr mit einem inneren Steg.The heat exchanger shown in the exemplary embodiment consists of a single flat tube 1 and a slat 2. The flat tube 1 has been bent annularly about the broad sides 10, wherein a substantially annular configuration is shown in the embodiment, the mold design, however, can be almost arbitrarily adjustable. A favorable production sequence of the heat exchanger provides that first a straight flat tube 1 is joined together with a lamella 2 . In the flat tube 1 can according to the left representation a in the Fig. 2 an indoor use are located. The middle representation b should be an extruded multi-chamber tube and the right representation c is a flat tube with an inner web.

An den Enden des Flachrohres 1 wird je eine Endkammer 30 sowie ein Einlassstutzen 31 an der einen Endkammer 30 und ein Auslassstutzen 32 an der anderen Endkammer 30 angesetzt. Je nach vorgesehenem Durchströmungsmuster des Flachrohres 1 könnte jedoch auch eine einzige Endkammer 30 mit einer Trennwand an einem Ende des Flachrohrs 1 vorgesehen werden. Das andere Ende des Flachrohres 1 wäre dann einfach verschlossen, wobei im Flachrohr dann ein Hinweg und ein Rückweg für das erste Kühlmittel ausgebildet sein würde. Dann wird eine Lamelle 2 an einer Breitseite 10 des Flachrohres 1 angelegt. Ferner kann ein Abdeckstreifen 21 als Verkleidung, ebenfalls aus Aluminiumblech, an der anderen Seite der Lamelle 2 hinzugefügt bzw. angesetzt werden. Der Abdeckstreifen 21 läuft etwa parallel zu den Breitseiten 10 des Flachrohres 1, und er weist zahlreiche Öffnungen 20 auf. Die Konstruktion wird anschließend in einem Hartlötprozess miteinander verbunden. Danach wird die Konstruktion im Wesentlichen mittels Biegens, mittels eines an sich bekannten Streckbiegeverfahrens, in die benötigte Form gebracht. Die Fig. 3 zeigt einen Wärmetauscher mit etwa kreisrunder Form. Die Form könnte aber auch oval sein oder Absätze aufweisen, wobei das Streckbiegeverfahren durch entsprechende Arbeitsschritte ergänzt wird, um die Absätze zu schaffen. (nicht gezeigt)At the ends of the flat tube 1 , one end chamber 30 and one inlet stub 31 are attached to one end chamber 30 and one outlet stub 32 to the other end chamber 30 . Depending on the intended flow pattern of the flat tube 1 , however, a single end chamber 30 could be provided with a partition wall at one end of the flat tube 1 . The other end of the flat tube 1 would then be simply closed, in the flat tube then a way and a return path for the first coolant would be formed. Then, a blade 2 is applied to a broad side 10 of the flat tube 1 . Further, a cover strip 21 as a cladding, also made of aluminum sheet, added to the other side of the slat 2 or attached. The cover strip 21 runs approximately parallel to the broad sides 10 of the flat tube 1, and it has numerous openings 20 . The construction is then connected together in a brazing process. Thereafter, the construction is brought into the required shape substantially by means of bending, by means of a known stretch bending process. The Fig. 3 shows a heat exchanger with approximately circular shape. The shape could also be oval or have heels, the stretch bending process is supplemented by appropriate steps to create the heels. (Not shown)

In der Fig. 1 wurde ein Ausschnitt aus der Gesamtkonstruktion dargestellt, aus dem ein Teil des Gehäuses 4 und auch ein Teil des rotierenden Maschinenelements 3 erkennbar ist. Das Gehäuse 4 umgibt das rotierende Maschinenelement 3. Der Wärmetauscher ist in das Gehäuse 4 eingesetzt und befestigt worden. Die nach innen zeigende Breitseite 10, an der sich die Lamelle 2 und (im Ausführungsbeispiel) auch das Abdeckblech 21 befinden, weist auf das rotierende Maschinenelement 3. Die Ein - und Auslassstutzen 31, 32 für das erste Kühlmittel können außerhalb des Gehäuses 4 mit einer Schlauchverbindung oder dergleichen angeschlossen werden. (nicht gezeigt) Auch nicht gezeigt wurde ein Ölsumpf, in den das rotierende Maschinenelement 3 eintaucht. Das Öl ist das zweite Kühlmittel, welches das rotierende Maschinenelement 3 kühlt. Durch die Rotation wird das Öl weggeschleudert, was in der Fig. 1 mittels lediglich einiger Tropfen 12 angedeutet sein soll. Das zu kühlende Öl strömt durch die Öffnungen 20 in den Raum, in dem sich die Lamelle 2 befindet, wird intensiv gekühlt und strömt anschließend wieder nach unten in den nicht gezeigten Sumpf.In the Fig. 1 was a section of the overall construction shown, from which a part of the housing 4 and also a part of the rotating machine element 3 can be seen. The housing 4 surrounds the rotating machine element 3. The heat exchanger has been inserted into the housing 4 and fastened. The inwardly facing broad side 10, at which the lamella 2 and (in the embodiment) and the cover plate 21 are located, points to the rotating machine element. 3 The inlet and outlet ports 31, 32 for the first coolant can be connected outside the housing 4 with a hose connection or the like. (not shown) Also not shown was an oil sump into which the rotating machine element 3 is immersed. The oil is the second coolant which cools the rotating machine element 3 . Due to the rotation, the oil is thrown away, resulting in the Fig. 1 should be indicated by means of only a few drops 12 . The oil to be cooled flows through the openings 20 into the space in which the blade 2 is located, is cooled intensively and then flows back down into the sump, not shown.

An den Endkammern 30 befinden sich Laschen 33, die miteinander verbunden werden können, sodass eine relativ stabile Wärmetauscherkonstruktion entsteht. Näheres dazu zeigen die Fig. 4 und 5. Die Verbindung zwischen den Laschen 33 kann beispielsweise mittels "Clinchen" erfolgen. Solche Verbindungen sind als so genannte Tox - Verbindungen in Fachkreisen bekannt. Beide Laschen liegen übereinander. Dann wird der unter der Stempelstirnfläche befindliche Werkstoff in eine Hinterschneidung in der unten liegenden Lasche gedrückt. Gezeichnet wurden lediglich zwei Tox - Punkte 35. Diese Verbindungsart ist einfach, schnell und zuverlässig.At the end chambers 30 are tabs 33 which can be connected together, so that a relatively stable heat exchanger construction is formed. More details show that 4 and 5 , The connection between the tabs 33 can be done for example by means of "clinching". Such compounds are known as so-called tox compounds in the art. Both tabs are on top of each other. Then the material located under the punch face is pressed into an undercut in the lower flap. Only two Tox - Points 35 were drawn. This connection method is simple, fast and reliable.

Die Fig. 6 zeigt, dass als gewellte Lamelle 2 eine solche aus dem Bereich Ölkühlung zum Einsatz kommt. In der linken Darstellung verläuft die Anordnung der Wellen in horizontaler Richtung. In der mittleren Darstellung laufen die Wellen vertikal, also in Erstreckungsrichtung des Flachrohres 1. In der rechten Darstellung ist die Wellenlaufrichtung um etwa 45° geneigt zur Längsrichtung vorgesehen worden. Mit solchen einfachen und kostengünstigen Maßnahmen kann auf den Wärmetausch in gewünschter Weise eingewirkt werden. Die Fig. 7 zeigt drei beispielhafte Abbildungen, die sich durch die Form und Anordnung der Öffnungen 20 unterscheiden. Auch der Flächenanteil der Öffnungen 20 zum Rest der Verkleidung 21 kann unterschiedlich sein. Es soll bewirkt werden, dass das Öl längere Zeit in Kontakt mit der Lamelle 2 und mit dem Flachrohr 1 bleibt.The Fig. 6 shows that as a corrugated fin 2 such from the field of oil cooling is used. In the left-hand illustration, the arrangement of the waves runs in the horizontal direction. In the middle illustration, the waves run vertically, ie in the extension direction of the flat tube 1. In the right-hand illustration, the shaft running direction has been provided inclined by approximately 45 ° to the longitudinal direction. With such simple and inexpensive measures can be acted on the heat exchange in the desired manner. The Fig. 7 shows three exemplary images, which differ by the shape and arrangement of the openings 20 . Also, the area ratio of the openings 20 to the rest of the panel 21 may be different. It is intended to cause the oil to remain in contact with the fin 2 and the flat tube 1 for a long time.

Claims (12)

  1. Housing (4) having a rotating machine element (3) which is arranged therein and a heat exchanger which is integrated therein consisting of at least one tube (1) for heat exchange between a first coolant which flows through the tube (1) and a second coolant which wets the heat exchanger under the action of centrifugal forces, in order to be cooled and to be made available for further cooling of the rotating machine element (3), the heat exchanger being of approximately annular configuration and surrounding the rotating machine element (3) substantially, characterized in that the at least one tube (1) is a flat tube which is of curved configuration over its wide sides (10), a slat (2) being fastened to the inwardly pointing wide side, and the wide sides (10) being arranged approximately parallel to the rotational axis (R).
  2. Housing according to Claim 1, characterized in that the slat (2) is provided with a covering (21) which is provided with openings (20) and extends approximately parallel to the wide side (10) of the flat tube.
  3. Housing according to Claim 2, characterized in that the openings (20) are configured and arranged in such a way that the second coolant can flow as far as the slat (2) and as far as the wide side (10) of the flat tube (1) and can flow out of the slat (2) again.
  4. Housing according to one of the preceding claims, characterized in that the second coolant flows into a sump or collecting trough of this type, in which it can be reached by the rotating machine element.
  5. Housing according to one of the preceding claims, characterized in that an end chamber (30) for feeding in and discharging the first coolant is arranged at one end of the at least one flat tube (1).
  6. Housing according to one of the preceding Claims 1 to 4, characterized in that an end chamber (30) is arranged at both ends of the at least one flat tube (1).
  7. Housing according to Claim 6, characterized in that lugs or connecting elements of this type are arranged on at least one of the end chambers (30), in order to connect both end chambers (30) to one another.
  8. Housing according to one of the preceding claims, characterized in that the at least one flat tube (1), in which the first coolant flows, is either a brazed or welded flat tube (1) with an inner insert, or a flat tube which is produced by means of extrusion processes.
  9. Housing according to one of the preceding claims, characterized in that the slat (2) has a wave-like contour profile, having numerous cuts, arranged offset, in the wave flanks, the wave profile being provided perpendicularly or in an inclined manner with respect to the direction of extent of the tube (1).
  10. Method for producing a housing (4) having a machine element (3) and a heat exchanger according to either of the preceding Claims 6 and 7, having the following method steps:
    a) a slat (2) is attached to the wide side (10) of the at least one flat tube (1),
    b) an end chamber (30) is attached at both ends of the flat tube (1),
    c) the parts are joined metallically,
    d) a bending operation is carried out, in order to produce an annular heat exchanger which is suitable for surrounding a rotating machine element (3), in order to cool a coolant for the rotating machine element (3).
  11. Method according to Claim 10, characterized in that step a) comprises the attachment of a covering (21), provided with openings, to the slat (2).
  12. Method according to Claims 10 or 11, characterized in that the end chambers (30) are connected to one another if required.
EP07702450.3A 2006-02-25 2007-02-15 Housing with rotating machine element and heat exchanger and production method Not-in-force EP1989500B8 (en)

Applications Claiming Priority (2)

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DE102006008857A DE102006008857A1 (en) 2006-02-25 2006-02-25 Heat exchanger and manufacturing process
PCT/DE2007/000297 WO2007095905A1 (en) 2006-02-25 2007-02-15 Heat exchanger and production method

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EP1989500A1 EP1989500A1 (en) 2008-11-12
EP1989500B1 true EP1989500B1 (en) 2016-04-13
EP1989500B8 EP1989500B8 (en) 2016-07-20

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EP (1) EP1989500B8 (en)
JP (1) JP4982878B2 (en)
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ITMO20120105A1 (en) * 2012-04-20 2013-10-21 Rossi S P A COOLING MODULE FOR GEAR REDUCER UNITS
DE102016209321A1 (en) 2016-05-30 2017-11-30 Schaeffler Technologies AG & Co. KG Friction clutch with cooling device
CN107654627B (en) * 2017-09-29 2023-11-10 麦格纳动力总成(江西)有限公司 Built-in cooling system of wet double clutch automatic transmission

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CN101389919A (en) 2009-03-18
CN101389919B (en) 2011-12-14
JP2009527720A (en) 2009-07-30
DE102006008857A1 (en) 2007-09-20
EP1989500B8 (en) 2016-07-20
EP1989500A1 (en) 2008-11-12
JP4982878B2 (en) 2012-07-25
US20090056913A1 (en) 2009-03-05
US8033321B2 (en) 2011-10-11

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