EP3001434A1 - Radiator for cooling a coolant liquid of a transformer - Google Patents

Radiator for cooling a coolant liquid of a transformer Download PDF

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Publication number
EP3001434A1
EP3001434A1 EP14186769.7A EP14186769A EP3001434A1 EP 3001434 A1 EP3001434 A1 EP 3001434A1 EP 14186769 A EP14186769 A EP 14186769A EP 3001434 A1 EP3001434 A1 EP 3001434A1
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EP
European Patent Office
Prior art keywords
cooling
radiator
transformer
cooling tube
cooling liquid
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.)
Granted
Application number
EP14186769.7A
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German (de)
French (fr)
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EP3001434B1 (en
Inventor
Uwe Janik
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Siemens Energy Global GmbH and Co KG
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Siemens AG
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Publication date
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Priority to EP14186769.7A priority Critical patent/EP3001434B1/en
Publication of EP3001434A1 publication Critical patent/EP3001434A1/en
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Publication of EP3001434B1 publication Critical patent/EP3001434B1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid cooling
    • H01F27/12—Oil cooling
    • 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
    • F28D1/03—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 plate-like or laminated conduits
    • F28D1/0308—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 plate-like or laminated conduits the conduits being formed by paired plates touching each other
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid cooling
    • H01F27/12—Oil cooling
    • H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2255/00—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes
    • F28F2255/02—Flexible elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/12—Safety or protection arrangements; Arrangements for preventing malfunction for preventing overpressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/14—Safety or protection arrangements; Arrangements for preventing malfunction for preventing damage by freezing, e.g. for accommodating volume expansion

Definitions

  • the invention relates to a radiator for cooling a coolant of a transformer with a plurality of parallel to a longitudinal axis of the radiator cooling tubes for receiving coolant.
  • Transformers are generally subject to aging and wear, especially when exposed to the risk of corrosion, for example when used on offshore platforms. For this reason, maintenance work is regularly carried out on transformers as well as event-related.
  • Liquid-cooled transformers usually have expansion vessels, which serve to accommodate cooling liquid, usually transformer oil, to compensate for thermal expansion of the cooling liquid.
  • cooling liquid usually transformer oil
  • an expansion vessel causes inherent contact between the coolant and the environment, which in the long term may affect the cooling fluid and thus in contact with components.
  • the invention has for its object to provide an improved radiator for cooling a coolant of a transformer, which reduces in particular the maintenance and repair needs of the transformer.
  • An inventive radiator for cooling a coolant of a transformer comprises at least one heat sink, which has a plurality of parallel to a longitudinal axis of the heat sink extending and spaced cooling tubes for receiving coolant.
  • Each cooling tube has at least one cooling tube wall extending along the longitudinal axis of the cooling body and designed to be elastically deformable for increasing the volume enclosed by the cooling tube.
  • Such a radiator can compensate for thermal expansion of the cooling liquid by increasing the volume enclosed by the cooling tubes.
  • the radiator can thereby take over the function of an expansion vessel for compensating thermal expansion of the cooling liquid in addition to the cooling of the cooling liquid.
  • a transformer with such a trained radiator thus requires no additional expansion vessel and thus no coolant lines between the expansion tank and the transformer tank.
  • the number of components of the transformer and the space required therefor and the maintenance and repair requirements for these components are reduced.
  • a contact of the cooling liquid with the environment, as it occurs in principle when using an expansion vessel, and thereby caused impairment of the cooling liquid and thus in contact components can be advantageously avoided.
  • An embodiment of the invention provides that at least one elastically deformable cooling tube wall has two edge regions extending along the longitudinal axis of the heat sink and one has these two edge regions connecting elastically deformable central region, wherein the central region in the undeformed state is substantially flat and each edge region is formed as curved to an outer side of the cooling tube wall shaft with a parallel to the longitudinal axis of the heat sink extending wave crest.
  • This embodiment of the invention advantageously makes it possible to realize an elastically deformable cooling tube wall in a simple manner solely by the shape of the cooling tube wall.
  • a further embodiment of the aforementioned embodiment of the invention provides that at least one cooling tube has two opposing cooling tube walls formed in this way.
  • a further embodiment of the abovementioned embodiments of the invention provides that at least one cooling tube consists of two elastically deformable cooling tube walls of the described type, wherein the edge regions of these cooling tube walls each extend in a flange region extending parallel to the longitudinal axis of the cooling body and away from the central region of the respective cooling tube wall leak, which is connected in a coolant-tight manner with a corresponding flange portion of the other cooling tube wall.
  • a cooling tube can be produced in a simple and efficient manner from two elastically deformable cooling tube walls by connecting these two cooling tube walls in their flange regions.
  • each elastically deformable cooling tube wall is made of a steel sheet.
  • each heat sink has at least one cooling liquid inlet region with an inlet opening for introducing cooling liquid into the cooling body, wherein the cooling liquid inlet region is connected to a first end of at least one cooling pipe for conducting cooling liquid from the cooling liquid inlet region into the cooling pipe.
  • each heat sink has at least onedestattkeitsauslass Scheme with an outlet opening for discharging cooling liquid from the heat sink
  • thedethekeitsauslass Scheme is connected to a second end of at least one cooling tube for conducting cooling liquid from the cooling tube in thedeckenkeitsauslass Scheme.
  • the two abovementioned embodiments of the invention advantageously make it possible to supply or remove cooling fluid to and from a heat sink and its cooling tubes via the cooling fluid inlet region or the cooling fluid outlet region of the cooling body.
  • a further embodiment of the invention provides that the radiator has a plurality of heat sinks arranged one behind the other.
  • a transformer according to the invention comprises a transformer tank, which can be filled at least partially with a cooling liquid, a radiator according to the invention for cooling the cooling liquid, at least a first connecting line for conducting cooling liquid from the transformer tank into the radiator and at least one second connecting line for conducting cooling liquid from the radiator in the transformer tank.
  • such a transformer can be realized with an appropriate design of the radiator without an expansion vessel to compensate for thermal expansion of the cooling liquid, since the radiator in addition to the cooling of the cooling liquid also performs the function of the expansion vessel, which the above advantages in particular with respect Reducing the need for maintenance and repair of the transformer.
  • Embodiments of such a transformer provide that the transformer has a tap changer, which comprises at least one vacuum interrupter chamber, and / or that the transformer tank has a common coolant space for a tap changer and an active part of the transformer, and / or that the transformer is a degassing device for the discharge of Gas from the transformer tank and / or has a drying device for dehumidifying the cooling liquid.
  • a tap changer which comprises at least one vacuum interrupter chamber
  • the transformer tank has a common coolant space for a tap changer and an active part of the transformer
  • the transformer is a degassing device for the discharge of Gas from the transformer tank and / or has a drying device for dehumidifying the cooling liquid.
  • a transformer according to the invention thereby makes possible also the use of a biodegradable insulating liquid, eg. As a natural or synthetic ester, as a cooling liquid with an acceptable aging behavior.
  • FIGS. 1 to 5 show various views of a heat sink 3 of a radiator 1 for cooling a cooling liquid of a FIG. 7 schematically illustrated transformer 100, wherein for better understanding in each case a coordinate system with Cartesian coordinates X, Y, Z shown is.
  • Show FIG. 1 a front view of the heat sink 3, FIG. 2 a transparent partial perspective view of the heat sink 3, FIG. 3 a side view of the heat sink 3, FIG. 4 a transparent plan view of the heat sink 3 and FIG. 5 an enlarged section of the FIG. 4
  • the radiator 1 according to a simple embodiment comprises only such a heat sink 3, according to other embodiments, a plurality of such heat sink 3, which are arranged, for example, along the Y direction one behind the other.
  • the heat sink 3 is formed to be flat so as to extend substantially in an XZ plane of the illustrated coordinate system and to have a small extent in the Y direction in comparison with its dimensions in the X direction and the Y direction.
  • the heat sink 3 has a plurality of (in the illustrated embodiment, five) cooling tubes 5 for receiving coolant.
  • the cooling tubes 5 are arranged at a distance from one another along the X direction next to one another and each extend parallel to a longitudinal axis of the radiator 1 extending in the Z direction, so that two adjacent cooling tubes 5 are separated from one another by a separating gap 7 extending in the Z direction ,
  • the heat sink 3 has a cooling liquid inlet portion 9 having an inlet opening 11 for introducing cooling liquid into the heat sink 3, the cooling liquid inlet portion 9 having an upper, first end 13 of each cooling tube 5 for conducting cooling liquid from the cooling liquid inlet portion 9 into the cooling tube 5 is connected.
  • the cooling body 3 has a cooling liquid outlet region 15 with an outlet opening 17 for discharging cooling liquid from the cooling body 3, the cooling liquid outlet region 15 having a lower, second end 19 of each cooling tube 5 is connected for the conduction of cooling liquid from the cooling tube 5 in thedeckenkeitsauslass Scheme 15.
  • FIG. 6 shows a cross-sectional view of a cooling tube 5 in an XY plane.
  • Each cooling tube 5 consists of two opposing cooling tube walls 21, which are each made of a steel sheet, for example.
  • Each cooling tube wall 21 has two edge regions 23 extending in the Z direction and an elastically deformable central region 25 connecting these two edge regions 23.
  • the central region 25 is essentially flat in the undeformed state.
  • Each edge region 23 is formed as a curved to an outer side of the cooling tube wall 21 shaft with a Z-direction extending wave crest. Furthermore, each edge region 23 in each case runs in a flange region 27 which faces away from the central region 25 of the respective cooling tube wall 21 and which is connected to a corresponding flange region 27 of the other cooling tube wall 21 in a manner that is cool liquid-tight, for example welded.
  • the cooling body 3 is closed cooling liquid-tight except for the inlet opening 11 and the outlet opening 17, so that, except through the inlet opening 11 and the outlet opening 17, no cooling liquid can enter the cooling body 3 or escape from the cooling body 3.
  • FIG. 7 schematically shows an embodiment of a transformer 100.
  • the transformer 100 includes a transformer tank 102, which is at least partially filled with a cooling liquid, a radiator 1 according to one of the above with reference to FIGS. 1 to 6 described embodiments, a first connecting line 104 for conducting cooling liquid from the transformer tank 102 in the radiator 1 and a second connecting line 106 for conducting cooling liquid from the radiator 1 in the transformer tank 102nd
  • the transformer 100 optionally comprises a tap changer 108 arranged in the transformer tank 102 and / or a degassing device 110, which is preferably arranged on an upper side of the transformer tank 102, and / or a drying apparatus 112 arranged on the transformer tank 102.
  • the transformer tank 102 preferably has a common cooling liquid space for the fan Tap changer 108 and an (not shown) active part of the transformer 100 on.
  • the first connection line 104 is formed, for example, as a collecting pipe extending between the transformer tank 102 and the radiator 1, which is connected to each heat sink 3 of the radiator 1 through an opening in the header pipe to the inlet opening 11 of the respective heat sink 3.
  • the second connection line 106 is accordingly designed, for example, as a collecting pipe extending between the transformer tank 102 and the radiator 1, which is connected to each heat sink 3 of the radiator 1 through an opening in the collection tube to the outlet opening 17 of the respective heat sink 3.
  • the tap changer 108 is for setting a voltage transmission ratio of the transformer 100, and preferably includes at least one vacuum switching chamber (not shown).
  • the degassing 110 serves to remove gas from the transformer tank 102, the z. B. out of the cooling liquid.
  • the drying device 112 serves to dehumidify the cooling liquid.
  • the transformer 100 comprises in particular no additional expansion vessel for receiving cooling liquid from the transformer tank 102 in the case of thermal expansion of cooling liquid in the transformer tank 102.
  • the function of such an expansion tank is taken over by the radiator 1, such thermal expansion of the cooling liquid by enlargements of the Cooling tubes 5 of the Radiators 1 enclosed volumes compensated by elastic deformation of the cooling tube walls 21 of the cooling tubes 5.
  • a transformer 100 include a plurality of radiators 1, which are arranged, for example, on different sides of the transformer tank 102, and / or a plurality of connecting lines 104, 106 for conducting cooling fluid between the transformer tank 102 and the radiator 1 or the radiators 1.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transformer Cooling (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Abstract

Die Erfindung betrifft einen Radiator (1) zur Kühlung einer Kühlflüssigkeit eines Transformators (100). Der Radiator (1) umfasst wenigstens einen Kühlkörper (3) mit mehreren parallel zu einer Längsachse des Kühlkörpers (3) verlaufenden und voneinander beabstandeten Kühlrohren (5) zur Aufnahme von Kühlflüssigkeit. Jedes Kühlrohr (5) weist wenigstens eine entlang der Längsachse des Kühlkörpers (3) verlaufende Kühlrohrwand (21) auf, die zur Vergrößerung des von dem Kühlrohr (5) umschlossenen Volumens elastisch verformbar ausgebildet ist.The invention relates to a radiator (1) for cooling a coolant of a transformer (100). The radiator (1) comprises at least one heat sink (3) with a plurality of cooling tubes (5) running parallel to a longitudinal axis of the heat sink (3) and spaced from each other for receiving cooling liquid. Each cooling tube (5) has at least one cooling tube wall (21) extending along the longitudinal axis of the cooling body (3), which is designed to be elastically deformable to increase the volume enclosed by the cooling tube (5).

Description

Die Erfindung betrifft einen Radiator zur Kühlung einer Kühlflüssigkeit eines Transformators mit mehreren parallel zu einer Längsachse des Radiators verlaufenden Kühlrohren zur Aufnahme von Kühlflüssigkeit.The invention relates to a radiator for cooling a coolant of a transformer with a plurality of parallel to a longitudinal axis of the radiator cooling tubes for receiving coolant.

Transformatoren unterliegen generell der Alterung und dem Verschleiß, insbesondere wenn sie, beispielsweise bei einer Verwendung auf Offshore-Plattformen, verstärkt der Gefahr von Korrision ausgesetzt sind. Daher werden an Transformatoren regelmäßig sowie ereignisbedingt Wartungsarbeiten durchgeführt. Flüssigkeitsgekühlte Transformatoren weisen in der Regel Ausdehnungsgefäße auf, die der Aufnahme von Kühlflüssigkeit, in der Regel von Transformatorenöl, dienen, um thermische Expansionen der Kühlflüssigkeit zu kompensieren. Zum Transport von Kühlflüssigkeit zwischen einem Ausdehnungsgefäß und dem Transformatorkessel weist ein derartiger Transformator außerdem Kühlflüssigkeitsleitungen auf. Sowohl das Ausdehnungsgefäß als auch die Kühlflüssigkeitsleitungen erhöhen die Umwelteinflüssen ausgesetzte Oberfläche eines Transformators und damit dessen Anfälligkeit für Schädigungen durch diese Umwelteinflüsse und dadurch auch den Bedarf an Wartungs- und Reparaturarbeiten. Außerdem verursacht ein Ausdehnungsgefäß prinzipbedingt einen Kontakt zwischen der Kühlflüssigkeit und der Umgebung, was auf Dauer die Kühlflüssigkeit und damit in Kontakt stehende Bauteile beeinträchtigen kann.Transformers are generally subject to aging and wear, especially when exposed to the risk of corrosion, for example when used on offshore platforms. For this reason, maintenance work is regularly carried out on transformers as well as event-related. Liquid-cooled transformers usually have expansion vessels, which serve to accommodate cooling liquid, usually transformer oil, to compensate for thermal expansion of the cooling liquid. For transporting cooling liquid between an expansion vessel and the transformer tank, such a transformer also has cooling liquid lines. Both the expansion vessel and the coolant lines increase the surface of a transformer exposed to environmental influences and thus its susceptibility to damage from these environmental influences and thereby also the need for maintenance and repair work. In addition, an expansion vessel causes inherent contact between the coolant and the environment, which in the long term may affect the cooling fluid and thus in contact with components.

Der Erfindung liegt die Aufgabe zugrunde, einen verbesserten Radiator zur Kühlung einer Kühlflüssigkeit eines Transformators anzugeben, der insbesondere den Wartungs- und Reparaturbedarf des Transformators reduziert.The invention has for its object to provide an improved radiator for cooling a coolant of a transformer, which reduces in particular the maintenance and repair needs of the transformer.

Die Aufgabe wird erfindungsgemäß durch einen Radiator mit den Merkmalen des Anspruchs 1 gelöst.The object is achieved by a radiator with the features of claim 1.

Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Advantageous embodiments of the invention are the subject of the dependent claims.

Ein erfindungsgemäßer Radiator zur Kühlung einer Kühlflüssigkeit eines Transformators umfasst wenigstens einen Kühlkörper, der mehrere parallel zu einer Längsachse des Kühlkörpers verlaufende und voneinander beabstandete Kühlrohre zur Aufnahme von Kühlflüssigkeit aufweist. Jedes Kühlrohr weist wenigstens eine entlang der Längsachse des Kühlkörpers verlaufende Kühlrohrwand, die zur Vergrößerung des von dem Kühlrohr umschlossenen Volumens elastisch verformbar ausgebildet ist, auf.An inventive radiator for cooling a coolant of a transformer comprises at least one heat sink, which has a plurality of parallel to a longitudinal axis of the heat sink extending and spaced cooling tubes for receiving coolant. Each cooling tube has at least one cooling tube wall extending along the longitudinal axis of the cooling body and designed to be elastically deformable for increasing the volume enclosed by the cooling tube.

Ein derartiger Radiator kann thermische Expansionen der Kühlflüssigkeit durch Vergrößerung der von den Kühlrohren umschlossenen Volumina kompensieren. Bei entsprechender Auslegung des Radiators kann der Radiator dadurch neben der Kühlung der Kühlflüssigkeit auch die Funktion eines Ausdehnungsgefäßes zur Kompensation thermischer Expansionen der Kühlflüssigkeit übernehmen. Ein Transformator mit einem derartig ausgebildeten Radiator benötigt dadurch kein zusätzliches Ausdehnungsgefäß und somit auch keine Kühlflüssigkeitsleitungen zwischen dem Ausdehnungsgefäß und dem Transformatorkessel. Dadurch werden vorteilhaft die Anzahl von Komponenten des Transformators und der dafür benötigte Bauraum sowie der Wartungs- und Reparaturbedarf für diese Komponenten reduziert. Außerdem kann ein Kontakt der Kühlflüssigkeit mit der Umgebung, wie er bei der Verwendung eines Ausdehnungsgefäßes prinzipbedingt eintritt, und eine dadurch verursachte Beeinträchtigung der Kühlflüssigkeit und damit in Kontakt stehender Bauteile vorteilhaft vermieden werden.Such a radiator can compensate for thermal expansion of the cooling liquid by increasing the volume enclosed by the cooling tubes. With a suitable design of the radiator, the radiator can thereby take over the function of an expansion vessel for compensating thermal expansion of the cooling liquid in addition to the cooling of the cooling liquid. A transformer with such a trained radiator thus requires no additional expansion vessel and thus no coolant lines between the expansion tank and the transformer tank. As a result, advantageously, the number of components of the transformer and the space required therefor and the maintenance and repair requirements for these components are reduced. In addition, a contact of the cooling liquid with the environment, as it occurs in principle when using an expansion vessel, and thereby caused impairment of the cooling liquid and thus in contact components can be advantageously avoided.

Eine Ausgestaltung der Erfindung sieht vor, dass wenigstens eine elastisch verformbare Kühlrohrwand zwei entlang der Längsachse des Kühlkörpers verlaufende Randbereiche und einen diese beiden Randbereiche verbindenden elastisch verformbaren Mittelbereich aufweist, wobei der Mittelbereich im unverformten Zustand im Wesentlichen eben ausgebildet ist und jeder Randbereich als zu einer Außenseite der Kühlrohrwand gewölbte Welle mit einem parallel zur Längsachse des Kühlkörpers verlaufenden Wellenkamm ausgebildet ist.An embodiment of the invention provides that at least one elastically deformable cooling tube wall has two edge regions extending along the longitudinal axis of the heat sink and one has these two edge regions connecting elastically deformable central region, wherein the central region in the undeformed state is substantially flat and each edge region is formed as curved to an outer side of the cooling tube wall shaft with a parallel to the longitudinal axis of the heat sink extending wave crest.

Diese Ausgestaltung der Erfindung ermöglicht vorteilhaft, eine elastisch verformbare Kühlrohrwand auf einfache Weise allein durch die Form der Kühlrohrwand zu realisieren.This embodiment of the invention advantageously makes it possible to realize an elastically deformable cooling tube wall in a simple manner solely by the shape of the cooling tube wall.

Eine Weitergestaltung der vorgenannten Ausgestaltung der Erfindung sieht vor, dass wenigstens ein Kühlrohr zwei sich gegenüber liegende derartig ausgebildete Kühlrohrwände aufweist.A further embodiment of the aforementioned embodiment of the invention provides that at least one cooling tube has two opposing cooling tube walls formed in this way.

Dadurch wird vorteilhaft die durch die elastische Verformung der Kühlrohrwände erzielbare Vergrößerung des von dem Kühlrohr umschlossenen Volumens gegenüber einem Kühlrohr mit nur einer elastisch verformbaren Kühlrohrwand erhöht.As a result, the enlargement of the volume enclosed by the cooling tube relative to a cooling tube with only one elastically deformable cooling tube wall, which can be achieved by the elastic deformation of the cooling tube walls, is advantageously increased.

Eine Weitergestaltung der vorgenannten Ausgestaltungen der Erfindung sieht vor, dass wenigstens ein Kühlrohr aus zwei sich gegenüber liegenden elastisch verformbaren Kühlrohrwänden der beschriebenen Art besteht, wobei die Randbereiche dieser Kühlrohrwände jeweils in einem parallel zur Längsachse des Kühlkörpers verlaufenden und von dem Mittelbereich der jeweiligen Kühlrohrwand abgewandten Flanschbereich auslaufen, der mit einem korrespondierenden Flanschbereich der anderen Kühlrohrwand kühlflüssigkeitsdicht verbunden ist.A further embodiment of the abovementioned embodiments of the invention provides that at least one cooling tube consists of two elastically deformable cooling tube walls of the described type, wherein the edge regions of these cooling tube walls each extend in a flange region extending parallel to the longitudinal axis of the cooling body and away from the central region of the respective cooling tube wall leak, which is connected in a coolant-tight manner with a corresponding flange portion of the other cooling tube wall.

Dadurch kann ein Kühlrohr in einfacher und effizienter Weise aus zwei elastisch verformbaren Kühlrohrwänden gefertigt werden, indem diese beiden Kühlrohrwände in ihren Flanschbereichen miteinander verbunden werden.As a result, a cooling tube can be produced in a simple and efficient manner from two elastically deformable cooling tube walls by connecting these two cooling tube walls in their flange regions.

Eine weitere Ausgestaltung der Erfindung sieht vor, dass jede elastisch verformbare Kühlrohrwand aus einem Stahlblech gefertigt ist.A further embodiment of the invention provides that each elastically deformable cooling tube wall is made of a steel sheet.

Dies ermöglicht eine einfach realisierbare Herstellung elastisch verformbarer und dennoch stabiler Kühlrohrwände der vorgenannten Art, da Stahlblech stabil, relativ einfach formbar und bei geeignet gewählter Dicke dennoch elastisch verformbar ist.This allows an easily realizable production of elastically deformable and yet stable cooling tube walls of the aforementioned type, since steel sheet is stable, relatively easy to shape and yet suitably selected thickness is elastically deformable.

Eine weitere Ausgestaltung der Erfindung sieht vor, dass jeder Kühlkörper wenigstens einen Kühlflüssigkeitseinlassbereich mit einer Einlassöffnung zum Einlassen von Kühlflüssigkeit in den Kühlkörper aufweist, wobei der Kühlflüssigkeitseinlassbereich mit einem ersten Ende wenigstens eines Kühlrohres zur Leitung von Kühlflüssigkeit aus dem Kühlflüssigkeitseinlassbereich in das Kühlrohr verbunden ist.A further embodiment of the invention provides that each heat sink has at least one cooling liquid inlet region with an inlet opening for introducing cooling liquid into the cooling body, wherein the cooling liquid inlet region is connected to a first end of at least one cooling pipe for conducting cooling liquid from the cooling liquid inlet region into the cooling pipe.

Eine weitere Ausgestaltung der Erfindung sieht vor, dass jeder Kühlkörper wenigstens einen Kühlflüssigkeitsauslassbereich mit einer Auslassöffnung zum Auslassen von Kühlflüssigkeit aus dem Kühlkörper aufweist, wobei der Kühlflüssigkeitsauslassbereich mit einem zweiten Ende wenigstens eines Kühlrohres zur Leitung von Kühlflüssigkeit aus dem Kühlrohr in den Kühlflüssigkeitsauslassbereich verbunden ist.A further embodiment of the invention provides that each heat sink has at least one Kühlflüssigkeitsauslassbereich with an outlet opening for discharging cooling liquid from the heat sink, the Kühlflüssigkeitsauslassbereich is connected to a second end of at least one cooling tube for conducting cooling liquid from the cooling tube in the Kühlflüssigkeitsauslassbereich.

Die beiden vorgenannten Ausgestaltungen der Erfindung ermöglichen vorteilhaft die Zufuhr bzw. Abfuhr von Kühlflüssigkeit zu bzw. aus einem Kühlkörper und dessen Kühlrohren über den Kühlflüssigkeitseinlassbereich bzw. den Kühlflüssigkeitsauslassbereich des Kühlkörpers.The two abovementioned embodiments of the invention advantageously make it possible to supply or remove cooling fluid to and from a heat sink and its cooling tubes via the cooling fluid inlet region or the cooling fluid outlet region of the cooling body.

Eine weitere Ausgestaltung der Erfindung sieht vor, dass der Radiator mehrere hintereinander angeordnete Kühlkörper aufweist.A further embodiment of the invention provides that the radiator has a plurality of heat sinks arranged one behind the other.

Dadurch kann die Kühlleistung des Radiators vorteilhaft gesteigert und dem jeweiligen Transformator angepasst werden. Ein erfindungsgemäßer Transformator umfasst einen Transformatorkessel, der wenigstens teilweise mit einer Kühlflüssigkeit befüllbar ist, einen erfindungsgemäßen Radiator zur Kühlung der Kühlflüssigkeit, wenigstens eine erste Verbindungsleitung zur Leitung von Kühlflüssigkeit aus dem Transformatorkessel in den Radiator und wenigstens eine zweite Verbindungsleitung zur Leitung von Kühlflüssigkeit aus dem Radiator in den Transformatorkessel.As a result, the cooling capacity of the radiator can advantageously be increased and adapted to the respective transformer. A transformer according to the invention comprises a transformer tank, which can be filled at least partially with a cooling liquid, a radiator according to the invention for cooling the cooling liquid, at least a first connecting line for conducting cooling liquid from the transformer tank into the radiator and at least one second connecting line for conducting cooling liquid from the radiator in the transformer tank.

Wie oben bereits ausgeführt wurde, kann ein derartiger Transformator bei entsprechender Auslegung des Radiators ohne ein Ausdehnungsgefäß zur Kompensation thermischer Expansionen der Kühlflüssigkeit realisiert werden, da der Radiator neben der Kühlung der Kühlflüssigkeit auch die Funktion des Ausdehnungsgefäßes übernimmt, was die oben genannten Vorteile insbesondere hinsichtlich der Reduzierung des Wartungs- und Reparaturbedarfs für den Transformator mit sich bringt.As already stated above, such a transformer can be realized with an appropriate design of the radiator without an expansion vessel to compensate for thermal expansion of the cooling liquid, since the radiator in addition to the cooling of the cooling liquid also performs the function of the expansion vessel, which the above advantages in particular with respect Reducing the need for maintenance and repair of the transformer.

Ausgestaltungen eines derartigen Transformators sehen vor, dass der Transformator einen Stufenschalter aufweist, der wenigstens eine Vakuumschaltkammer umfasst, und/oder dass der Transformatorkessel einen gemeinsamen Kühlflüssigkeitsraum für einen Stufenschalter und einen Aktivteil des Transformators aufweist, und/oder dass der Transformator eine Entgasungsvorrichtung zur Abführung von Gas aus dem Transformatorkessel und/oder eine Trocknungsvorrichtung zur Entfeuchtung der Kühlflüssigkeit aufweist.Embodiments of such a transformer provide that the transformer has a tap changer, which comprises at least one vacuum interrupter chamber, and / or that the transformer tank has a common coolant space for a tap changer and an active part of the transformer, and / or that the transformer is a degassing device for the discharge of Gas from the transformer tank and / or has a drying device for dehumidifying the cooling liquid.

Alle diese Ausgestaltungen reduzieren vorteilhaft weiter den Wartungs- und Reparaturbedarf für den Transformator. So sind Stufenschalter mit Vakuumschaltkammern weitgehend wartungsarm, und die Abführung von Gas aus dem Transformatorkessel durch eine Entgasungsvorrichtung sowie die Entfeuchtung der Kühlflüssigkeit durch eine Trocknungsvorrichtung verhindern die Beeinträchtigung der Kühlflüssigkeit und damit in Verbindung stehender Bauteile durch Gas bzw. Feuchtigkeit. Insbesondere ermöglicht ein erfindungsgemäßer Transformator dadurch auch die Verwendung einer biologisch abbaubaren Isolierflüssigkeit, z. B. eines natürlichen oder synthetischen Esters, als Kühlflüssigkeit mit einem akzeptablen Alterungsverhalten.All of these refinements advantageously further reduce the maintenance and repair requirements for the transformer. Thus, tap changers with vacuum interrupters largely maintenance, and the removal of gas from the transformer tank by a degassing and the dehumidification of the cooling liquid by a drying device prevent the deterioration of the cooling liquid and related components by gas or moisture. In particular, a transformer according to the invention thereby makes possible also the use of a biodegradable insulating liquid, eg. As a natural or synthetic ester, as a cooling liquid with an acceptable aging behavior.

Die oben beschriebenen Eigenschaften, Merkmale und Vorteile dieser Erfindung sowie die Art und Weise, wie diese erreicht werden, werden klarer und deutlicher verständlich im Zusammenhang mit der folgenden Beschreibung von Ausführungsbeispielen, die im Zusammenhang mit den Zeichnungen näher erläutert werden. Dabei zeigen:

FIG 1
eine Vorderansicht eines Kühlkörpers eines Radiators,
FIG 2
eine transparente perspektivische Teildarstellung des in Figur 1 dargestellten Kühlkörpers,
FIG 3
eine Seitenansicht des in Figur 1 dargestellten Kühlkörpers,
FIG 4
eine transparente Draufsicht auf den in Figur 1 dargestellten Kühlkörper,
FIG 5
einen vergrößerten Ausschnitt der Figur 4,
FIG 6
eine Querschnittsdarstellung eines Kühlrohres, und
FIG 7
schematisch einen Transformator.
The above-described characteristics, features, and advantages of this invention, as well as the manner in which they will be achieved, will become clearer and more clearly understood in connection with the following description of exemplary embodiments which will be described in detail in conjunction with the drawings. Showing:
FIG. 1
a front view of a heat sink of a radiator,
FIG. 2
a transparent partial perspective view of the in FIG. 1 shown heatsink,
FIG. 3
a side view of the in FIG. 1 shown heatsink,
FIG. 4
a transparent top view of the in FIG. 1 shown heatsink,
FIG. 5
an enlarged section of the FIG. 4 .
FIG. 6
a cross-sectional view of a cooling tube, and
FIG. 7
schematically a transformer.

Einander entsprechende Teile sind in allen Figuren mit den gleichen Bezugszeichen versehen.Corresponding parts are provided in all figures with the same reference numerals.

Die Figuren 1 bis 5 zeigen verschiedene Darstellungen eines Kühlkörpers 3 eines Radiators 1 zur Kühlung einer Kühlflüssigkeit eines in Figur 7 schematisch dargestellten Transformators 100, wobei zum besseren Verständnis jeweils auch ein Koordinatensystem mit kartesischen Koordinaten X, Y, Z dargestellt ist. Dabei zeigen Figur 1 eine Vorderansicht des Kühlkörpers 3, Figur 2 eine transparente perspektivische Teildarstellung des Kühlkörpers 3, Figur 3 eine Seitenansicht des Kühlkörpers 3, Figur 4 eine transparente Draufsicht auf den Kühlkörper 3 und Figur 5 einen vergrößerten Ausschnitt der Figur 4. Der Radiator 1 umfasst gemäß einem einfachen Ausführungsbeispiel nur einen derartigen Kühlkörper 3, gemäß anderen Ausführungsbeispielen mehrere derartige Kühlkörper 3, die beispielsweise entlang der Y-Richtung hintereinander angeordnet sind.The FIGS. 1 to 5 show various views of a heat sink 3 of a radiator 1 for cooling a cooling liquid of a FIG. 7 schematically illustrated transformer 100, wherein for better understanding in each case a coordinate system with Cartesian coordinates X, Y, Z shown is. Show FIG. 1 a front view of the heat sink 3, FIG. 2 a transparent partial perspective view of the heat sink 3, FIG. 3 a side view of the heat sink 3, FIG. 4 a transparent plan view of the heat sink 3 and FIG. 5 an enlarged section of the FIG. 4 , The radiator 1 according to a simple embodiment comprises only such a heat sink 3, according to other embodiments, a plurality of such heat sink 3, which are arranged, for example, along the Y direction one behind the other.

Der Kühlkörper 3 ist flach ausgebildet, so dass er sich im Wesentlichen in einer XZ-Ebene des dargestellten Koordinatensystems erstreckt und in der Y-Richtung eine im Vergleich zu seinen Ausdehnungen in der X-Richtung und der Y-Richtung geringe Ausdehnung hat.The heat sink 3 is formed to be flat so as to extend substantially in an XZ plane of the illustrated coordinate system and to have a small extent in the Y direction in comparison with its dimensions in the X direction and the Y direction.

Der Kühlkörper 3 weist mehrere (im dargestellten Ausführungsbeispiel fünf) Kühlrohre 5 zur Aufnahme von Kühlflüssigkeit auf. Die Kühlrohre 5 sind voneinander beabstandet entlang der X-Richtung nebeneinander angeordnet und verlaufen jeweils parallel zu einer in der Z-Richtung verlaufenden Längsachse des Radiators 1, so dass je zwei benachbarte Kühlrohre 5 durch einen in der Z-Richtung verlaufenden Trennspalt 7 voneinander getrennt sind.The heat sink 3 has a plurality of (in the illustrated embodiment, five) cooling tubes 5 for receiving coolant. The cooling tubes 5 are arranged at a distance from one another along the X direction next to one another and each extend parallel to a longitudinal axis of the radiator 1 extending in the Z direction, so that two adjacent cooling tubes 5 are separated from one another by a separating gap 7 extending in the Z direction ,

Oberhalb der Kühlrohre 5 weist der Kühlkörper 3 einen Kühlflüssigkeitseinlassbereich 9 mit einer Einlassöffnung 11 zum Einlassen von Kühlflüssigkeit in den Kühlkörper 3 auf, wobei der Kühlflüssigkeitseinlassbereich 9 mit einem oberen, ersten Ende 13 jedes Kühlrohres 5 zur Leitung von Kühlflüssigkeit aus dem Kühlflüssigkeitseinlassbereich 9 in das Kühlrohr 5 verbunden ist.Above the cooling tubes 5, the heat sink 3 has a cooling liquid inlet portion 9 having an inlet opening 11 for introducing cooling liquid into the heat sink 3, the cooling liquid inlet portion 9 having an upper, first end 13 of each cooling tube 5 for conducting cooling liquid from the cooling liquid inlet portion 9 into the cooling tube 5 is connected.

Unterhalb der Kühlrohre 5 weist der Kühlkörper 3 einen Kühlflüssigkeitsauslassbereich 15 mit einer Auslassöffnung 17 zum Auslassen von Kühlflüssigkeit aus dem Kühlkörper 3 auf, wobei der Kühlflüssigkeitsauslassbereich 15 mit einem unteren, zweiten Ende 19 jedes Kühlrohres 5 zur Leitung von Kühlflüssigkeit aus dem Kühlrohr 5 in den Kühlflüssigkeitsauslassbereich 15 verbunden ist.Below the cooling tubes 5, the cooling body 3 has a cooling liquid outlet region 15 with an outlet opening 17 for discharging cooling liquid from the cooling body 3, the cooling liquid outlet region 15 having a lower, second end 19 of each cooling tube 5 is connected for the conduction of cooling liquid from the cooling tube 5 in the Kühlflüssigkeitsauslassbereich 15.

Figur 6 zeigt eine Querschnittsdarstellung eines Kühlrohres 5 in einer XY-Ebene. Jedes Kühlrohr 5 besteht aus zwei sich gegenüber liegenden Kühlrohrwänden 21, die beispielsweise jeweils aus einem Stahlblech gefertigt sind. Jede Kühlrohrwand 21 weist zwei in Z-Richtung verlaufende Randbereiche 23 und einen diese beiden Randbereiche 23 verbindenden elastisch verformbaren Mittelbereich 25 auf. Der Mittelbereich 25 ist im unverformten Zustand im Wesentlichen eben ausgebildet. FIG. 6 shows a cross-sectional view of a cooling tube 5 in an XY plane. Each cooling tube 5 consists of two opposing cooling tube walls 21, which are each made of a steel sheet, for example. Each cooling tube wall 21 has two edge regions 23 extending in the Z direction and an elastically deformable central region 25 connecting these two edge regions 23. The central region 25 is essentially flat in the undeformed state.

Jeder Randbereich 23 ist als zu einer Außenseite der Kühlrohrwand 21 gewölbte Welle mit einem in Z-Richtung verlaufenden Wellenkamm ausgebildet. Ferner läuft jeder Randbereich 23 jeweils in einem von dem Mittelbereich 25 der jeweiligen Kühlrohrwand 21 abgewandten Flanschbereich 27 aus, der mit einem korrespondierenden Flanschbereich 27 der anderen Kühlrohrwand 21 kühlflüssigkeitsdicht verbunden, beispielsweise verschweißt, ist.Each edge region 23 is formed as a curved to an outer side of the cooling tube wall 21 shaft with a Z-direction extending wave crest. Furthermore, each edge region 23 in each case runs in a flange region 27 which faces away from the central region 25 of the respective cooling tube wall 21 and which is connected to a corresponding flange region 27 of the other cooling tube wall 21 in a manner that is cool liquid-tight, for example welded.

Der Kühlkörper 3 ist bis auf die Einlassöffnung 11 und die Auslassöffnung 17 kühlflüssigkeitsdicht geschlossen, so dass außer durch die Einlassöffnung 11 und die Auslassöffnung 17 keine Kühlflüssigkeit in den Kühlkörper 3 eintreten kann oder aus dem Kühlkörper 3 austreten kann.The cooling body 3 is closed cooling liquid-tight except for the inlet opening 11 and the outlet opening 17, so that, except through the inlet opening 11 and the outlet opening 17, no cooling liquid can enter the cooling body 3 or escape from the cooling body 3.

Figur 7 zeigt schematisch ein Ausführungsbeispiel eines Transformators 100. Der Transformator 100 umfasst einen Transformatorkessel 102, der wenigstens teilweise mit einer Kühlflüssigkeit befüllbar ist, einen Radiator 1 gemäß einem der oben anhand der Figuren 1 bis 6 beschriebenen Ausführungsbeispiele, eine erste Verbindungsleitung 104 zur Leitung von Kühlflüssigkeit aus dem Transformatorkessel 102 in den Radiator 1 und eine zweite Verbindungsleitung 106 zur Leitung von Kühlflüssigkeit aus dem Radiator 1 in den Transformatorkessel 102. FIG. 7 schematically shows an embodiment of a transformer 100. The transformer 100 includes a transformer tank 102, which is at least partially filled with a cooling liquid, a radiator 1 according to one of the above with reference to FIGS. 1 to 6 described embodiments, a first connecting line 104 for conducting cooling liquid from the transformer tank 102 in the radiator 1 and a second connecting line 106 for conducting cooling liquid from the radiator 1 in the transformer tank 102nd

Ferner umfasst der Transformator 100 optional einen in dem Transformatorkessel 102 angeordneten Stufenschalter 108 und/oder eine vorzugsweise an einer Oberseite des Transformatorkessels 102 angeordnete Entgasungsvorrichtung 110 und/oder eine an dem Transformatorkessel 102 angeordnete Trocknungsvorrichtung 112. Der Transformatorkessel 102 weist vorzugsweise einen gemeinsamen Kühlflüssigkeitsraum für den Stufenschalter 108 und einen (nicht näher dargestellten) Aktivteil des Transformators 100 auf.Furthermore, the transformer 100 optionally comprises a tap changer 108 arranged in the transformer tank 102 and / or a degassing device 110, which is preferably arranged on an upper side of the transformer tank 102, and / or a drying apparatus 112 arranged on the transformer tank 102. The transformer tank 102 preferably has a common cooling liquid space for the fan Tap changer 108 and an (not shown) active part of the transformer 100 on.

Die erste Verbindungsleitung 104 ist beispielsweise als ein zwischen dem Transformatorkessel 102 und dem Radiator 1 verlaufendes Sammelrohr ausgebildet, das an jeden Kühlkörper 3 des Radiators 1 durch eine Öffnung in dem Sammelrohr zu der Einlassöffnung 11 des jeweiligen Kühlkörpers 3 angeschlossen ist. Die zweite Verbindungsleitung 106 ist entsprechend beispielsweise als ein zwischen dem Transformatorkessel 102 und dem Radiator 1 verlaufendes Sammelrohr ausgebildet, das an jeden Kühlkörper 3 des Radiators 1 durch eine Öffnung in dem Sammelrohr zu der Auslassöffnung 17 des jeweiligen Kühlkörpers 3 angeschlossen ist.The first connection line 104 is formed, for example, as a collecting pipe extending between the transformer tank 102 and the radiator 1, which is connected to each heat sink 3 of the radiator 1 through an opening in the header pipe to the inlet opening 11 of the respective heat sink 3. The second connection line 106 is accordingly designed, for example, as a collecting pipe extending between the transformer tank 102 and the radiator 1, which is connected to each heat sink 3 of the radiator 1 through an opening in the collection tube to the outlet opening 17 of the respective heat sink 3.

Der Stufenschalter 108 dient der Einstellung eines Spannungsübersetzungsverhältnisses des Transformators 100 und umfasst vorzugsweise wenigstens eine (nicht näher dargestellte) Vakuumschaltkammer. Die Entgasungsvorrichtung 110 dient der Abführung von Gas aus dem Transformatorkessel 102, das z. B. aus der Kühlflüssigkeit ausgast. Die Trocknungsvorrichtung 112 dient der Entfeuchtung der Kühlflüssigkeit.The tap changer 108 is for setting a voltage transmission ratio of the transformer 100, and preferably includes at least one vacuum switching chamber (not shown). The degassing 110 serves to remove gas from the transformer tank 102, the z. B. out of the cooling liquid. The drying device 112 serves to dehumidify the cooling liquid.

Der Transformator 100 umfasst insbesondere kein zusätzliches Ausdehnungsgefäß zur Aufnahme von Kühlflüssigkeit aus dem Transformatorkessel 102 im Falle einer thermischen Expansion von Kühlflüssigkeit im Transformatorkessel 102. Die Funktion eines derartigen Ausdehnungsgefäßes wird von dem Radiator 1 übernommen, der derartige thermische Expansionen der Kühlflüssigkeit durch Vergrößerungen der von den Kühlrohren 5 des Radiators 1 umschlossenen Volumina durch elastische Verformungen der Kühlrohrwände 21 der Kühlrohre 5 kompensiert.The transformer 100 comprises in particular no additional expansion vessel for receiving cooling liquid from the transformer tank 102 in the case of thermal expansion of cooling liquid in the transformer tank 102. The function of such an expansion tank is taken over by the radiator 1, such thermal expansion of the cooling liquid by enlargements of the Cooling tubes 5 of the Radiators 1 enclosed volumes compensated by elastic deformation of the cooling tube walls 21 of the cooling tubes 5.

Andere Ausführungsbeispiele eines Transformators 100 umfassen mehrere Radiatoren 1, die beispielsweise an verschiedenen Seiten des Transformatorkessels 102 angeordnet sind, und/oder mehrere Verbindungsleitungen 104, 106 zur Leitung von Kühlflüssigkeit zwischen dem Transformatorkessel 102 und dem Radiator 1 oder den Radiatoren 1.Other embodiments of a transformer 100 include a plurality of radiators 1, which are arranged, for example, on different sides of the transformer tank 102, and / or a plurality of connecting lines 104, 106 for conducting cooling fluid between the transformer tank 102 and the radiator 1 or the radiators 1.

Obwohl die Erfindung im Detail durch bevorzugte Ausführungsbeispiele näher illustriert und beschrieben wurde, so ist die Erfindung nicht durch die offenbarten Beispiele eingeschränkt und andere Variationen können vom Fachmann hieraus abgeleitet werden, ohne den Schutzumfang der Erfindung zu verlassen.While the invention has been further illustrated and described in detail by way of preferred embodiments, the invention is not limited by the disclosed examples, and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention.

Claims (13)

Radiator (1) zur Kühlung einer Kühlflüssigkeit eines Transformators (100), der Radiator (1) umfassend - wenigstens einen Kühlkörper (3) mit mehreren parallel zu einer Längsachse des Kühlkörpers (3) verlaufenden und voneinander beabstandeten Kühlrohren (5) zur Aufnahme von Kühlflüssigkeit, - wobei jedes Kühlrohr (5) wenigstens eine entlang der Längsachse des Kühlkörpers (3) verlaufende Kühlrohrwand (21) aufweist, die zur Vergrößerung des von dem Kühlrohr (5) umschlossenen Volumens elastisch verformbar ausgebildet ist. Radiator (1) for cooling a cooling liquid of a transformer (100) comprising the radiator (1) at least one heat sink (3) with a plurality of cooling tubes (5) extending parallel to a longitudinal axis of the heat sink (3) and spaced apart from one another for receiving cooling liquid, - Wherein each cooling tube (5) has at least one along the longitudinal axis of the cooling body (3) extending cooling tube wall (21) which is designed to increase the volume of the cooling tube (5) elastically deformable. Radiator (1) nach Anspruch 1,
dadurch gekennzeichnet, dass wenigstens eine elastisch verformbare Kühlrohrwand (21) zwei entlang der Längsachse des Kühlkörpers (3) verlaufende Randbereiche (23) und einen diese beiden Randbereiche (23) verbindenden elastisch verformbaren Mittelbereich (25) aufweist, wobei der Mittelbereich (25) im unverformten Zustand im Wesentlichen eben ausgebildet ist und jeder Randbereich (23) als zu einer Außenseite der Kühlrohrwand (21) gewölbte Welle mit einem parallel zur Längsachse des Kühlkörpers (3) verlaufenden Wellenkamm ausgebildet ist.Radiator (1) according to claim 1,
characterized in that at least one elastically deformable cooling tube wall (21) comprises two edge regions (23) extending along the longitudinal axis of the heat sink (3) and an elastically deformable middle region (25) connecting these two edge regions (23), wherein the central region (25) undeformed state is formed essentially flat and each edge region (23) as to an outside of the cooling tube wall (21) arched shaft is formed with a parallel to the longitudinal axis of the heat sink (3) extending wave crest. Radiator (1) nach Anspruch 2,
dadurch gekennzeichnet, dass wenigstens ein Kühlrohr (5) zwei sich gegenüber liegende und jeweils gemäß Anspruch 2 ausgebildete Kühlrohrwände (21) aufweist.Radiator (1) according to claim 2,
characterized in that at least one cooling tube (5) has two opposite and each according to claim 2 formed cooling tube walls (21). Radiator (1) nach einem der Ansprüche 2 oder 3,
dadurch gekennzeichnet, dass wenigstens ein Kühlrohr (5) aus zwei sich gegenüber liegenden und jeweils gemäß Anspruch 2 ausgebildeten Kühlrohrwänden (21) besteht, deren Randbereiche (23) jeweils in einem parallel zur Längsachse des Kühlkörpers (3) verlaufenden und von dem Mittelbereich (25) der jeweiligen Kühlrohrwand (21) abgewandten Flanschbereich (27) auslaufen, der mit einem korrespondierenden Flanschbereich (27) der anderen Kühlrohrwand (21) kühlflüssigkeitsdicht verbunden ist.Radiator (1) according to one of claims 2 or 3,
characterized in that at least one cooling tube (5) consists of two opposite and each according to claim 2 formed cooling tube walls (21) whose edge regions (23) each in a direction parallel to the longitudinal axis of the heat sink (3) extending from the central region (25 ) of the respective cooling tube wall (21) facing away from flange region (27), which with a corresponding flange (27) of the other cooling tube wall (21) is connected in a coolant-tight manner. Radiator (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass jede elastisch verformbare Kühlrohrwand (21) aus einem Stahlblech gefertigt ist.Radiator (1) according to one of the preceding claims, characterized in that each elastically deformable cooling tube wall (21) is made of a steel sheet. Radiator (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass jeder Kühlkörper (3) wenigstens einen Kühlflüssigkeitseinlassbereich (9) mit einer Einlassöffnung (11) zum Einlassen von Kühlflüssigkeit in den Kühlkörper (3) aufweist, wobei der Kühlflüssigkeitseinlassbereich (9) mit einem ersten Ende (13) wenigstens eines Kühlrohres (5) zur Leitung von Kühlflüssigkeit aus dem Kühlflüssigkeitseinlassbereich (9) in das Kühlrohr (5) verbunden ist.Radiator (1) according to one of the preceding claims, characterized in that each heat sink (3) has at least one cooling liquid inlet region (9) with an inlet opening (11) for introducing cooling liquid into the cooling body (3), wherein the cooling liquid inlet region (9) a first end (13) of at least one cooling tube (5) for the conduction of cooling liquid from the Kühlflüssigkeitseinlassbereich (9) in the cooling tube (5) is connected. Radiator (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass jeder Kühlkörper (3) wenigstens einen Kühlflüssigkeitsauslassbereich (15) mit einer Auslassöffnung (17) zum Auslassen von Kühlflüssigkeit aus dem Kühlkörper (3) aufweist, wobei der Kühlflüssigkeitsauslassbereich (15) mit einem zweiten Ende (19) wenigstens eines Kühlrohres (5) zur Leitung von Kühlflüssigkeit aus dem Kühlrohr (5) in den Kühlflüssigkeitsauslassbereich (15) verbunden ist.Radiator (1) according to one of the preceding claims, characterized in that each heat sink (3) has at least one Kühlflüssigkeitsauslassbereich (15) with an outlet opening (17) for discharging cooling liquid from the heat sink (3), wherein the Kühlflüssigkeitsauslassbereich (15) a second end (19) of at least one cooling tube (5) for conducting cooling liquid from the cooling tube (5) into the Kühlflüssigkeitsauslassbereich (15) is connected. Radiator (1) nach einem der vorhergehenden Ansprüche, gekennzeichnet durch mehrere hintereinander angeordnete Kühlkörper (3).Radiator (1) according to one of the preceding claims, characterized by a plurality of heat sinks (3) arranged one behind the other. Transformator (100), umfassend - einen Transformatorkessel (102), der wenigstens teilweise mit einer Kühlflüssigkeit befüllbar ist, - einen Radiator (1) gemäß einem der vorhergehenden Ansprüche zur Kühlung der Kühlflüssigkeit, - wenigstens eine erste Verbindungsleitung (104) zur Leitung von Kühlflüssigkeit aus dem Transformatorkessel (102) in den Radiator (1) - und wenigstens eine zweite Verbindungsleitung (106) zur Leitung von Kühlflüssigkeit aus dem Radiator (1) in den Transformatorkessel (102). Transformer (100) comprising a transformer tank (102) which can be filled at least partially with a cooling liquid, a radiator (1) according to one of the preceding claims for cooling the cooling liquid, - At least a first connecting line (104) for conducting cooling liquid from the transformer tank (102) in the radiator (1) - And at least a second connecting line (106) for conducting coolant from the radiator (1) in the transformer tank (102). Transformator (100) nach Anspruch 9,
gekennzeichnet durch einen Stufenschalter (108), der wenigstens eine Vakuumschaltkammer umfasst.Transformer (100) according to claim 9,
characterized by a tap changer (108) comprising at least one vacuum switching chamber. Transformator (100) nach Anspruch 9 oder 10,
dadurch gekennzeichnet, dass der Transformatorkessel (102) einen gemeinsamen Kühlflüssigkeitsraum für einen Stufenschalter (108) und einen Aktivteil des Transformators (100) aufweist.Transformer (100) according to claim 9 or 10,
characterized in that the transformer tank (102) has a common coolant space for a tap changer (108) and an active part of the transformer (100). Transformator (100) nach einem der Ansprüche 9 bis 11, gekennzeichnet durch eine Entgasungsvorrichtung (110) zur Abführung von Gas aus dem Transformatorkessel (102).Transformer (100) according to one of claims 9 to 11, characterized by a degassing device (110) for removing gas from the transformer tank (102). Transformator (100) nach einem der Ansprüche 9 bis 12, gekennzeichnet durch eine Trocknungsvorrichtung (112) zur Entfeuchtung der Kühlflüssigkeit.Transformer (100) according to one of claims 9 to 12, characterized by a drying device (112) for dehumidifying the cooling liquid.
EP14186769.7A 2014-09-29 2014-09-29 Radiator for cooling a coolant liquid of a transformer Active EP3001434B1 (en)

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EP (1) EP3001434B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3822568A1 (en) * 2019-11-14 2021-05-19 Siemens Energy Global GmbH & Co. KG Radiator for cooling a transformer or a choke

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1971624U (en) * 1967-07-12 1967-11-02 Paul Gatterbauer APPARATUS CONTAINER IN CLOSED PRESSURE SEAL CONSTRUCTION.
JPS5249418A (en) * 1975-10-17 1977-04-20 Kozo Shiaku Conservator panel peplacing conservator of oil-immersed transformer
DE10010737C2 (en) * 2000-03-04 2002-01-10 Alstom Paris Radiator for an electrical transformer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB879200A (en) * 1956-10-31 1961-10-04 Washington Engineering Ltd Improvements in or relating to tubular heat exchangers

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1971624U (en) * 1967-07-12 1967-11-02 Paul Gatterbauer APPARATUS CONTAINER IN CLOSED PRESSURE SEAL CONSTRUCTION.
JPS5249418A (en) * 1975-10-17 1977-04-20 Kozo Shiaku Conservator panel peplacing conservator of oil-immersed transformer
DE10010737C2 (en) * 2000-03-04 2002-01-10 Alstom Paris Radiator for an electrical transformer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3822568A1 (en) * 2019-11-14 2021-05-19 Siemens Energy Global GmbH & Co. KG Radiator for cooling a transformer or a choke
US11728086B2 (en) 2019-11-14 2023-08-15 Siemens Energy Global GmbH & Co. KG Radiator for cooling a transformer or a choke, unit including a transformer or a choke and method for producing a radiator

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