EP2932516B1 - Dehnradiator für einen hermetisch abgeschlossenen elektrischen transformator - Google Patents

Dehnradiator für einen hermetisch abgeschlossenen elektrischen transformator Download PDF

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Publication number
EP2932516B1
EP2932516B1 EP12810166.4A EP12810166A EP2932516B1 EP 2932516 B1 EP2932516 B1 EP 2932516B1 EP 12810166 A EP12810166 A EP 12810166A EP 2932516 B1 EP2932516 B1 EP 2932516B1
Authority
EP
European Patent Office
Prior art keywords
expansion
radiator according
flow guiding
guiding part
expansion radiator
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.)
Active
Application number
EP12810166.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2932516A1 (de
Inventor
Richard PEINBAUER
Martin WENIGER
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.)
Siemens AG
Original Assignee
Siemens AG
Siemens Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP2932516A1 publication Critical patent/EP2932516A1/de
Application granted granted Critical
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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
    • 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
    • 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
    • F28D1/0316—Assemblies of conduits in parallel
    • 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
    • F28D1/0358—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 bent plates
    • 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
    • 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
    • H01F27/02—Casings
    • H01F27/022—Encapsulation
    • 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
    • F28D2021/0028—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for cooling heat generating elements, e.g. for cooling electronic components or electric devices
    • F28D2021/0031—Radiators for recooling a coolant of cooling systems
    • 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

Definitions

  • the invention relates to a Dehnradiator for a hermetically sealed electrical transformer or a throttle, which is supplied to a heat exchange fluid via an inlet means, by a Dehnwellen cavity formed by a Dehnwelle and an associated cover member, and then discharged via drainage means.
  • Electric transformers or chokes as used in power distribution networks, are usually cooled with an insulating oil.
  • a compensating vessel is provided on the cover of the transformer tank.
  • this expansion tank in contact with the ambient air absorbs moisture and oxygen in the insulating oil, which accelerates the aging process of the insulating paper and reduces the service life.
  • it is also known to seal off the transformer hermetically against the external environment.
  • Dehnradiatoren are known as cooling device, which are connected via connecting lines to the transformer tank and can cope with a certain range of fluctuation of the oil volume by bulging of their cooling elements.
  • a Dehnradiator but can not design-related course an arbitrarily large expansion volume, but only one of its design associated maximum expansion volume compensate.
  • a cooling device for transformers in which individual radiator members compensate for fluctuating volumes by bulging is known, for example, from US Pat DE 100 10 737 C2 known. It is formed from two sheet metal parts provided with a plurality of beads, wherein the two sheet metal parts are connected / welded together at the edge and are additionally connected to one another by welds in the beads. In contrast to conventional radiators, the two sheets are connected to each other only every other one of the plurality of beads in order to obtain a larger expansion volume and without losing the mechanical stability. To achieve the most efficient cooling, the bulges in the DE 10 2005 002 005 B4 bounded by a spacer strip. In both embodiments, the two sheet metal parts of the radiator members are circumferentially welded together, which makes consuming expensive to manufacture.
  • thisderadiator which is formed of a support plate and a single corrugated metal sheet.
  • the individual shafts are supplied by headers, so-called collectors, with heat exchange fluid (coolant).
  • this cooling fluid does not flow at the same time when entering in the direction of the bow of the sheet metal parts, but obliquely downward in the cavity of a Dehnwelle.
  • the upper part of the corrugated sheet only contributes to a reduced extent to the cooling effect.
  • the stretch radiator has expansion shafts, in each of which a flow-guiding part is arranged in the mouth region.
  • the flow guide deflects the incoming heat exchange fluid on entering the cavity of the Dehnwelle toward the outer edge, that is to the bow of the Dehnwelle.
  • the consequence of this is that the cooling effect of the upper part of the radiator, which is close to the manifold, is comparatively larger.
  • a better cooling effect means that the operating temperature of the transformer oil is lower.
  • the fluctuation range for the volume of oil in the transformer tank is reduced. A lower volume fluctuation mean, however, that less bulging is required by the radiator.
  • a preferred embodiment of the Dehnradiators can be constructed so that the Strömungsleitteil is formed so that the cross section of the projecting into the Dehnwelle Strömungsleitteils decreases seen in the direction of the end face to the outflowing collecting pipe.
  • the cooling medium is efficiently directed in the direction of the bugs, but the further liquid flow experiences a lower flow resistance.
  • the flow guide projecting into the interior of the expansion shaft may be a plate-shaped part, e.g. a sheet that has the shape of a trapezoid.
  • the flow guide projecting into the expansion shaft may be pointed towards the bow, e.g. in the form of a wedge.
  • the flow-guiding part is trapezoidal in its surface shape and its cross-section is tapered in the direction of the bow.
  • the flow guide is designed as a cone or similar thereto. It is only important that the guide element protrudes into the expansion shaft and deflects the inflowing transformer oil in the direction of the outer edge side, where the heat dissipation is particularly favorable.
  • each Dehnwellen series is formed of a single welded on a cover plate corrugated metal.
  • strain radiator according to the invention is advantageously applicable to distribution transformers in energy supply networks.
  • the FIG. 1 shows in a perspective view a Dehnradiator invention 1.
  • the Dehnradiator 1 consists essentially of two rows of expansion shafts 9, which are respectively disposed on both sides of an upper manifold 2 and a lower manifold 12 (collectors).
  • the expansion shafts 9 are welded at their back in the region of the inside between the two headers 2,12 with a cover plate 6 by means of a weld 11.
  • the front sides of the expansion shaft are welded liquid-tight top and bottom.
  • the cross section of the manifold 2 is rectangular in the example shown and opens into a circular tube with a flange for connection to a transformer or a throttle.
  • the heat exchange medium (insulating oil, for example Transformer oil) and leaves the Dehnradiator 1 at its lower manifold 12.
  • the structural design is symmetrical with respect to an imaginary passing through the collectors 2, 12 center plane.
  • the two expansion shafts 9 are each formed from a single corrugated sheet (folding plate).
  • an expansion shaft (cooling fin) protrudes about 100 to 300 mm, has a thickness of about 10 mm (with a plate thickness of about 1 mm) and a distance of about 50 mm.
  • Each expansion shaft 9 encloses an elongated expansion shaft cavity 7 seen in the longitudinal extension of the expansion shaft (see FIG. 5 ). This cavity 7 is welded liquid-tight at each end and, as already said liquid-conducting connected to an upper and lower manifold 2,12 (inlet and outlet).
  • Each Dehnwelle 9 comes in a Dehnradiator a double function: on the one hand, the transported during operation of the transformer / throttle through the cooling medium zoomed amount of heat to be dissipated to the environment; On the other hand, an operational fluctuation of the pressure in the hermetically sealed transformer tank should be compensated. This compensation of the oil volume or the oil pressure is effected by a corresponding elastic deformation of the Dehnwelle 9.
  • Each Dehnwelle 9 is constructed in the manner of a pillow. In the event of an overpressure in the transformer tank, bulging of the cushion occurs. With regard to the volume compensation, it is advantageous if the expansion shaft 9 itself is made of an elastic, easily yielding material. In FIG. 1 the upper header 2 is cut in the region of a section "M".
  • FIG. 2 shows an enlarged view of the section "M" of FIG. 1 ,
  • the sectional view makes the view free to mouth areas 4 in the manifold cavity 3.
  • the transformer oil flows into a Dehnwelle 9, according to the invention, this flow through a flow guide 5 (FIG. FIG. 4 ) towards the outside Edge, that is the bend of the corrugated sheet, the bow 8.
  • the partially cut representation of the FIG. 2 also shows that the manifold 2 is formed from two mutually with their legs directed U-profiles.
  • FIG. 3 shows the Dehnradiator 1 according to the invention in a side view.
  • FIG. 4 shows a sectional view of a detail according to the line "PP" of FIG. 3 .
  • the flow guide 5 is very easy to recognize here. According to the embodiment of the invention shown here, it is a plate-shaped part of the shape of a trapezoid. It is welded to the lower U-profile of the manifold 2 and protrudes with increasingly lower height in the expansion shaft cavity 7 inside. As a result, the cooling medium (arrow 14) flowing into the opening region 4 is directed to the outer edge of the expansion shaft 9, that is to the bow 8. Subsequently, the flow direction follows the arrow 15 in the direction of the drain. As far as the cooling effect is concerned, the in FIG.
  • the upper manifold 2 is formed of two with their legs facing each other U-profiles.
  • the manifold cavity 3 is rectangular in cross section.
  • the flow part 5 is a sheet metal part which is welded to the lower of these U-profiles.
  • FIG. 5 shows in an exploded magnified spatial representation of a single expansion shaft 9 and the associated cover plate 6.
  • the Dehnwelle 9 consists of a bent by 180 ° sheet metal (corrugated metal or folding plate), in which the two legs extend almost parallel to the bow 8.
  • the flow guide 5 can be seen, which tapers to a point in the direction of the bow 8, on the other hand, however, has the shape of a trapezoid.
  • Isolation coolant eg transformer oil

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transformer Cooling (AREA)
  • Transformers For Measuring Instruments (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
EP12810166.4A 2012-12-12 2012-12-12 Dehnradiator für einen hermetisch abgeschlossenen elektrischen transformator Active EP2932516B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2012/075233 WO2014090296A1 (de) 2012-12-12 2012-12-12 Dehnradiator für einen hermetisch abgeschlossenen elektrischen transformator

Publications (2)

Publication Number Publication Date
EP2932516A1 EP2932516A1 (de) 2015-10-21
EP2932516B1 true EP2932516B1 (de) 2017-02-01

Family

ID=47504878

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12810166.4A Active EP2932516B1 (de) 2012-12-12 2012-12-12 Dehnradiator für einen hermetisch abgeschlossenen elektrischen transformator

Country Status (6)

Country Link
US (1) US9831025B2 (OSRAM)
EP (1) EP2932516B1 (OSRAM)
BR (1) BR112015012829B8 (OSRAM)
IN (1) IN2015DN04306A (OSRAM)
MX (1) MX363556B (OSRAM)
WO (1) WO2014090296A1 (OSRAM)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014002096A1 (de) * 2014-02-14 2015-08-20 Loos & Co. Kg Wellwandtrafokessel mit Überhitzungsschutz
US9812242B1 (en) * 2016-05-19 2017-11-07 Power Distribution Systems Development LLC Systems and methods for liquid heat exchange for transformers
CN112912975A (zh) * 2018-10-19 2021-06-04 Abb电网瑞士股份公司 用于具有改进的冷却的变压器的散热器
CN109494055A (zh) * 2018-12-18 2019-03-19 辽宁易德实业集团有限公司 智能真空灭弧立体卷铁芯调容调压变压器
CN111564292B (zh) * 2020-05-29 2025-07-29 正泰电气股份有限公司 天然酯绝缘油变压器

Family Cites Families (12)

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Publication number Priority date Publication date Assignee Title
US1568727A (en) * 1925-02-02 1926-01-05 Gen Electric Corrugated sheet-metal casing
DE1078146B (de) 1956-10-27 1960-03-24 August Lepper Transformatorenw Waermetauscher mit in einer Reihe nebeneinander angeordneten und ueber einen gemeinsamen mit Leitvorrichtungen versehenen Verteiler- bzw. Sammelkanal verbundenen Elementen
JPS607372B2 (ja) 1979-02-28 1985-02-23 株式会社日立製作所 放熱器
JPS5877218A (ja) * 1981-10-31 1983-05-10 Toshiba Corp 油入電気機器用タンクの製造方法
JP2546505Y2 (ja) * 1991-05-23 1997-09-03 株式会社ゼクセル 熱交換器のブラケット取付構造
DE10010737C2 (de) 2000-03-04 2002-01-10 Alstom Paris Radiator für einen elektrischen Transformator
US7182124B2 (en) * 2004-08-31 2007-02-27 Egbon Electronics Ltd. Heat sink structure
DE102005002005B4 (de) 2005-01-17 2007-02-08 Areva Energietechnik Gmbh Kühlvorrichtung insbesondere für einen elektrischen Transformator
US7593230B2 (en) * 2005-05-05 2009-09-22 Sensys Medical, Inc. Apparatus for absorbing and dissipating excess heat generated by a system
US7604040B2 (en) * 2005-06-15 2009-10-20 Coolit Systems Inc. Integrated liquid cooled heat sink for electronic components
US7795877B2 (en) * 2006-11-02 2010-09-14 Current Technologies, Llc Power line communication and power distribution parameter measurement system and method
DE102009015377B4 (de) * 2008-06-27 2011-12-15 André Meuleman Kühlradiator für einen Transformator

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
MX2015007382A (es) 2015-09-16
US9831025B2 (en) 2017-11-28
MX363556B (es) 2019-03-27
EP2932516A1 (de) 2015-10-21
WO2014090296A1 (de) 2014-06-19
US20150325358A1 (en) 2015-11-12
BR112015012829A2 (pt) 2017-07-11
IN2015DN04306A (OSRAM) 2015-10-16
BR112015012829B1 (pt) 2021-02-09
BR112015012829B8 (pt) 2023-04-25

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