EP0109587A1 - Transformer with an oil-cooled active part and sound reducing resonators - Google Patents

Transformer with an oil-cooled active part and sound reducing resonators Download PDF

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Publication number
EP0109587A1
EP0109587A1 EP83110831A EP83110831A EP0109587A1 EP 0109587 A1 EP0109587 A1 EP 0109587A1 EP 83110831 A EP83110831 A EP 83110831A EP 83110831 A EP83110831 A EP 83110831A EP 0109587 A1 EP0109587 A1 EP 0109587A1
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EP
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Prior art keywords
bulges
transformer according
resonators
boiler
oil
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EP83110831A
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German (de)
French (fr)
Inventor
Erich Dr. Reiplinger
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Transformatoren Union AG
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Transformatoren Union AG
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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
    • 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
    • H01F27/33—Arrangements for noise damping

Definitions

  • the invention relates to a transformer with an oil-cooled active part made of an iron core and windings installed in a boiler and with sound-absorbing resonators between the active part and the boiler wall.
  • German patent application P 31 33 981.6 it is proposed to reduce this noise radiation to arrange resonators between the active part and the boiler walls within the oil space.
  • These resonators are constructed as vibration systems in which serving as a vibrating mass for relieving the boiler wall magnetically effective shield walls are provided, which are supported by large compressible intermediate layers on the boiler side walls and which are coordinated so that the natural frequency of the vibration systems is less than 0.7 times the mains frequency.
  • the disadvantage here is the additional effort for the large-area compressible intermediate layer, for which only a few and very expensive materials are suitable in view of the aging resistance with considerable thermal and chemical stress.
  • the invention is based on the object for transformers with large nominal powers, the induction of which cannot be reduced, for example with regard to permissible transport dimensions, to provide a boiler design which noticeably dampens the transmission of vibrations generated by the iron core to the boiler magnetostrictively and by the windings magnetodynamically and thereby a more free installation and "handling of large transformers.
  • the construction of the resonators from sheet metal is very advantageous because they withstand the thermal and chemical loads occurring in the transformer without any problems in the long run and because even if the chambers formed by the bulges fail, the operational safety of the transformer as such is not impaired, but only the noise radiation rises to the existing volume level for the noise radiation without the measure according to the invention.
  • the depth of the bulges is equal to 5 to 10 times the sheet thickness, the individual bulges being approximately circular and having a diameter of approximately 40 mm, and that the natural frequency of each sheet cutout forming a bulge is equal to twice the network frequency or an integer multiple thereof.
  • the bulges are arranged in rows and the gussets between them are connected to the opposite sheet in the same way as the edges.
  • the sheets are expediently connected to one another by soldering or gluing, the solder or the adhesive being inserted in the form of a film which wets the adjacent sheet metal surfaces when heated and firmly connects them to one another after cooling.
  • a particularly useful development of the invention is that the resonators are each soldered together from a weaker, bulged and a stronger, flat aluminum sheet and at the same time as a shield wall keep the magnetic field in the oil chamber away from the boiler wall.
  • An undervoltage winding 2 and an high-voltage winding 3 with winding end faces 4 are arranged around a mostly multi-leg core 1, which is usually constructed from laminated metal sheets.
  • the core 1, the undervoltage winding 2 and the high-voltage winding 3 together form the active part of the transformer and are set up in a manner not shown in a boiler with a bottom 5, boiler side walls 6 and a cover 7.
  • the boiler is completely filled with a cooling and insulating liquid 8, usually transformer oil.
  • resonators are arranged opposite the high-voltage windings 3, consisting of a sheet 9 facing the boiler side wall 6 and a sheet 10 facing the active part of the transformer.
  • the resonators made of the sheets 9 and 10 rest only on their fastening points on the boiler wall parts and, moreover, hang freely in the space filled with the cooling and insulating liquid 8 in front of the boiler side wall 6.
  • the sheet 9 opposite the boiler side wall 6 is thicker than the sheet 10 facing the active part of the transformer, in which lenticular bulges 11 are also provided.
  • the sheets 9 and 10 are connected to one another in a vacuum-tight manner at least at their edges, for example by soldering or gluing.
  • the actual soldering or gluing process takes place in a device at a pressure lower than atmospheric, preferably at a pressure that is as close as possible to the vacuum.
  • the indentation of the bulges 11 essentially only stands in the way of the strength of the sheet 10 that can be derived from the shape and the material.
  • the deformation work on the sheet 10 caused, for example, by vibrations in the cooling and insulating liquid 8 is influenced little or not at all by gas or air cushions enclosed between the sheets 9 and 10, and essentially also not as a locally occurring vibration by the sheet 10 transferred to the sheet 9.
  • their natural frequency can be predetermined and is selected so that it is equal to twice the network frequency or an integer multiple thereof.
  • the sheets 9 and 10 In order to shield the boiler side walls 6 from the magnetic field emanating from the active part of the transformer, it is expedient to produce the sheets 9 and 10 from a material which is both highly thermally and electrically conductive, for example aluminum or copper or steel. This makes it possible to dispense with a special magnetic shield connected upstream of the resonators.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Transformer Cooling (AREA)
  • Regulation Of General Use Transformers (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Coils Of Transformers For General Uses (AREA)

Abstract

In order to reduce the sound emission, in transformers of this type resonators are arranged between the active part and a tank which surrounds this active part and is used as a reservoir for the cooling fluid. According to the invention, two plates (9, 10), connected to one another at least at their edges in a vacuum-sealed manner are used as resonators, at least one (10) of which plates has bulges (11) projecting into the oil chamber (8) in the form of a lens, the space in the bulges (11) between the plates (9 and 10) being almost free of gas and empty of air. The use of such resonators is particularly expedient in high-power transformers in order to reduce vibration which is emitted to the cooling fluid, and is generated magneto- strictively by the iron cores and is generated electrodynamically by the windings. <IMAGE>

Description

Die Erfindung betrifft einen Transformator mit in einem Kessel aufgestellten, ölgekühlten Aktivteil aus einem Eisenkern und Wicklungen sowie mit schalldämpfenden Resonatoren zwischen dem Aktivteil und der Kesselwand.The invention relates to a transformer with an oil-cooled active part made of an iron core and windings installed in a boiler and with sound-absorbing resonators between the active part and the boiler wall.

Große flüssigkeitsgekühlte Transformatoren sind Geräuschquellen, deren Schalleistungspegel mit zunehmender Nennleistung ebenfalls zunimmt und bei einer Nennleistung von 1000 MVA in der Größenordnung von 100 dB (A) liegt. Die diese Geräusche verursachenden Schwingungen werden im wesentlichen durch magnetostriktive Bewegungen des Eisenkerns, mit zunehmender Nennleistung und Belastung aber auch durch magnetodynamisch bedingte Schwingungen der Wicklungen erzeugt und durch die praktisch inkompressible Flüssigkeit auf die Kesselseitenwände übertragen, die diese Schwingungen als Geräusch an die Umgebung abgeben.Large liquid-cooled transformers are sources of noise, the sound power level of which also increases with increasing nominal power and is of the order of 100 dB (A) with a nominal power of 1000 MVA. The vibrations causing these noises are essentially generated by magnetostrictive movements of the iron core, with increasing nominal power and load, but also by magnetodynamically induced vibrations of the windings and transmitted by the practically incompressible liquid to the boiler side walls, which emit these vibrations as noise to the environment.

In der deutschen Patentanmeldung P 31 33 981.6 wird zur Minderung dieser Geräuschabstrahlung vorgeschlagen, zwischen dem Aktivteil und den Kesselwänden innerhalb des Ölraumes Resonatoren anzuordnen. Diese Resonatoren sind als Schwingungssysteme aufgebaut, in denen als schwingende Masse zur Entlastung der Kesselwand dienende magnetisch wirksame Schirmwände vorgesehen sind, die von großflächigen kompressiblen Zwischenlagen auf den Kesselseitenwänden abgestützt sind und die so aufeinander abgestimmt sind, daß die Eigenfrequenz des Schwingungssystems kleiner ist als das 0,7-fache der Netzfrequenz. Nachteilig ist hierbei der zusätzliche Aufwand für die großflächige kompressible Zwischenlage, für die im Hinblick auf die Alterungsbeständigkeit bei erheblicher thermischer und chemischer Beanspruchung nur wenige und sehr teuere Werkstoffe geeignet sind.In German patent application P 31 33 981.6 it is proposed to reduce this noise radiation to arrange resonators between the active part and the boiler walls within the oil space. These resonators are constructed as vibration systems in which serving as a vibrating mass for relieving the boiler wall magnetically effective shield walls are provided, which are supported by large compressible intermediate layers on the boiler side walls and which are coordinated so that the natural frequency of the vibration systems is less than 0.7 times the mains frequency. The disadvantage here is the additional effort for the large-area compressible intermediate layer, for which only a few and very expensive materials are suitable in view of the aging resistance with considerable thermal and chemical stress.

Der Erfindung liegt nun die Aufgabe zugrunde für Transformatoren mit großen Nennleistungen, deren Induktion beispielsweise im Hinblick auf zulässige Transportabmessungen nicht zu vermindern ist, eine Kesselausführung zu schaffen, die die Übertragung von vom Eisenkern magnetostriktiv und von den Wicklungen magnetodynamisch erzeugten Schwingungen auf den Kessel spürbar dämpft und dadurch eine freizügigere Aufstellung und" Handhabung von Großtransformatoren erlaubt.The invention is based on the object for transformers with large nominal powers, the induction of which cannot be reduced, for example with regard to permissible transport dimensions, to provide a boiler design which noticeably dampens the transmission of vibrations generated by the iron core to the boiler magnetostrictively and by the windings magnetodynamically and thereby a more free installation and "handling of large transformers.

Diese Aufgabe wird bei einem Kessel, auf dessen Seitenwänden innen Resonatoren vorgesehen sind, erfindungsgemäß dadurch gelöst, daß als Resonator zwei mindestens an ihren Rändern vakuumdicht miteinander verbundene Bleche dienen, daß mindestens eines dieser Bleche linsenartige in den Ölraum hineinragende Ausbuchtungen aufweist, daß der Raum in den Ausbuchtungen zwischen den Blechen annähernd gasfrei und luftleer ist und daß die Ausbuchtungen durch im Öl auftretende Schallschwingungen eingedrückt werden und dabei Schallenergie aufnehmen.This object is achieved in a boiler, on the side walls of which resonators are provided on the inside, according to the invention in that two plates, which are connected to one another at least at their edges, serve as resonators, in that at least one of these plates has lenticular bulges projecting into the oil space that the space in the bulges between the sheets is almost gas-free and air-free and that the bulges are pressed in by sound vibrations occurring in the oil and thereby absorb sound energy.

Der Aufbau der Resonatoren aus Blechen ist sehr vorteilhaft, weil diese den im Transformator auftretenden thermischen und chemischen Belastungen ohne weiteres auf Dauer standhalten und weil auch beim Versagen durch Undichtwerden der von den Ausbuchtungen gebildeten Kammern die Betriebssicherheit des Transformators als solchem nicht beeinträchtigt wirdp sondern lediglich die Geräuschabstrahlung auf das ohne die erfindungsgemäße Maßnahme vorhandene Lautstärkeniveau für die Geräuschabstrahlung ansteigt.The construction of the resonators from sheet metal is very advantageous because they withstand the thermal and chemical loads occurring in the transformer without any problems in the long run and because even if the chambers formed by the bulges fail, the operational safety of the transformer as such is not impaired, but only the noise radiation rises to the existing volume level for the noise radiation without the measure according to the invention.

Nach zweckmäßigen Weiterbildungen der Erfindung ist vorgesehen, daß die Tiefe der Ausbuchtungen gleich der 5- bis 10-fachen Blechdicke ist, wobei die einzelnen Ausbuchtungen etwa kreisrund sind und einen Durchmesser von etwa 40 mm haben und daß dabei die Eigenfrequenz eines jeweils eine Ausbuchtung bildenden Blechausschnittes gleich der doppelten Netzfrequenz oder einem ganzzahligen Vielfachen hiervon ist.According to expedient developments of the invention, it is provided that the depth of the bulges is equal to 5 to 10 times the sheet thickness, the individual bulges being approximately circular and having a diameter of approximately 40 mm, and that the natural frequency of each sheet cutout forming a bulge is equal to twice the network frequency or an integer multiple thereof.

Nach vorteilhaften Ausgestaltungen der Erfindung sind die Ausbuchtungen in Reihen angeordnet und sind die zwischen ihnen liegenden Zwickel in gleicher Weise mit dem gegenüberliegenden Blech verbunden, wie die Ränder. Zweckmäßigerweise sind die Bleche durch Löten oder Kleben miteinander verbunden, wobei das Lot bzw. der Klebstoff in Form einer Folie eingelegt ist, die bei Erwärmung die anliegenden Blechflächen benetzt und diese nach Abkühlung fest miteinander verbindet.According to advantageous embodiments of the invention, the bulges are arranged in rows and the gussets between them are connected to the opposite sheet in the same way as the edges. The sheets are expediently connected to one another by soldering or gluing, the solder or the adhesive being inserted in the form of a film which wets the adjacent sheet metal surfaces when heated and firmly connects them to one another after cooling.

Eine besonders zweckmäßige Weiterbildung der Erfindung besteht darin, daß die Resonatoren aus je einem schwächeren, mit Ausbuchtungen versehenen und je einem stärkeren, ebenen Aluminiumblech aufeinandergelötet sind und gleichzeitig als Schirmwand das im Ölraum bestehende Magnetfeld von der Kesselwand fernhalten.A particularly useful development of the invention is that the resonators are each soldered together from a weaker, bulged and a stronger, flat aluminum sheet and at the same time as a shield wall keep the magnetic field in the oil chamber away from the boiler wall.

Ein Ausführungsbeispiel der Erfindung wird anhand einer Zeichnung näher erläutert.

  • Fig. 1 zeigt einen Querschnitt durch einen flüssigkeitsgekühlten Transformator.
  • Fig. 2 und 3 zeigen eine Einzelheit aus Fig. 1 in größerem Maßstab im Querschnitt und in einer Draufsicht. 1 1
An embodiment of the invention is explained in more detail with reference to a drawing.
  • Fig. 1 shows a cross section through a liquid-cooled transformer.
  • 2 and 3 show a detail from FIG. 1 on a larger scale in cross section and in a plan view. 1 1

Um einen in üblicher Weise aus lamellierten Blechen aufgebauten meist mehrschenkligen Kern 1 sind eine Unterspannungswicklung 2 und eine Oberspannungswicklung 3 mit Wicklungsstirnflächen 4 angeordnet. Der Kern 1, die Unterspannungswicklung 2 und die Oberspannungswicklung 3 bilden zusammen den Aktivteil des Transformators und sind in nicht näher dargestellter Art und Weise in einem Kessel mit einem Boden 5, Kesselseitenwänden 6 und einem Deckel 7 aufgestellt. Der Kessel ist vollständig mit einer Kühl- und Isolierflüssigkeit 8, üblicherweise Transformatoröl, gefüllt.An undervoltage winding 2 and an high-voltage winding 3 with winding end faces 4 are arranged around a mostly multi-leg core 1, which is usually constructed from laminated metal sheets. The core 1, the undervoltage winding 2 and the high-voltage winding 3 together form the active part of the transformer and are set up in a manner not shown in a boiler with a bottom 5, boiler side walls 6 and a cover 7. The boiler is completely filled with a cooling and insulating liquid 8, usually transformer oil.

Auf der Innenseite der Kesselseitenwände 6 sind den Oberspannungswicklungen 3 gegenüberliegende Resonatoren aus einem der Kesselseitenwand 6 zugekehrten Blech 9 und einem dem Aktivteil des Transformators zugekehrten Blech 10 angeordnet. Die Resonatoren aus den Blechen 9 und 10 liegen lediglich an ihren Befestigungsstellen an Kesselwandteilen an und hängen im übrigen frei in dem von der Kühl- und Isolierflüssigkeit 8 ausgefüllten Raum vor der Kesselseitenwand 6.On the inside of the boiler side walls 6, resonators are arranged opposite the high-voltage windings 3, consisting of a sheet 9 facing the boiler side wall 6 and a sheet 10 facing the active part of the transformer. The resonators made of the sheets 9 and 10 rest only on their fastening points on the boiler wall parts and, moreover, hang freely in the space filled with the cooling and insulating liquid 8 in front of the boiler side wall 6.

Beim dargestellten Ausführungsbeispiel ist das der Kesselseitenwand 6 gegenüberliegende Blech 9 dicker als das dem Aktivteil des Transformators zugekehrte Blech 10, in dem darüberhinaus linsenförmige Ausbuchtungen 11 vorgesehen sind. Die Bleche 9 und 10 sind mindestens an ihren Rändern, beispielsweise durch Löten oder Kleben, vakuumdicht miteinander verbunden. Der eigentliche Löt- oder Klebvorgang erfolgt in einer Vorrichtung bei niedrigerem als dem atmosphärischen Druck, vorzugsweise bei einem möglichst dicht am Vakuum liegenden niedrigen Druck. Dadurch steht dem eindrücken der Ausbuchtungen 11 im wesentlichen nur die aus der Form und dem Werkstoff ableitbare Festigkeit des Bleches 10 entgegen. Demzufolge wird die beispielsweise durch in der Kühl- und Isolierflüssigkeit 8 auftretende Schwingungen verursachte Formänderungsarbeit an dem Blech 10 durch zwischen den Blechen 9 und 10 eingeschlossene Gas- oder Luftpolster wenig oder überhaupt nicht beeinflußt, und im wesentlichen auch nicht als örtlich auftretende Schwingung von dem Blech 10 auf das Blech 9 übertragen.In the exemplary embodiment shown, the sheet 9 opposite the boiler side wall 6 is thicker than the sheet 10 facing the active part of the transformer, in which lenticular bulges 11 are also provided. The sheets 9 and 10 are connected to one another in a vacuum-tight manner at least at their edges, for example by soldering or gluing. The The actual soldering or gluing process takes place in a device at a pressure lower than atmospheric, preferably at a pressure that is as close as possible to the vacuum. As a result, the indentation of the bulges 11 essentially only stands in the way of the strength of the sheet 10 that can be derived from the shape and the material. As a result, the deformation work on the sheet 10 caused, for example, by vibrations in the cooling and insulating liquid 8 is influenced little or not at all by gas or air cushions enclosed between the sheets 9 and 10, and essentially also not as a locally occurring vibration by the sheet 10 transferred to the sheet 9.

Durch entsprechende Auswahl der Stärke der Bleche 9 und 10 sowie die geometrischen Abmessungen der Ausbuchtungen 11 ist deren Eigenfrequenz vorherbestimmbar und ist so gewählt, daß sie gleich der doppelten Netzfrequenz oder einem ganzzahligen Vielfachen hiervon ist.By appropriate selection of the thickness of the sheets 9 and 10 and the geometric dimensions of the bulges 11, their natural frequency can be predetermined and is selected so that it is equal to twice the network frequency or an integer multiple thereof.

Um die Kesselseitenwände 6 von dem vom Aktivteil des Transformators ausgehenden Magnetfeld abzuschirmen, ist es zweckmäßig, die Bleche 9 und 10 aus einem sowohl thermisch als auch elektrisch gut leitenden Werkstoff, beispielsweise aus Aluminium oder Kupfer oder auch aus Stahl herzustellen. Dadurch ist es möglich, auf eine besondere, den Resonatoren vorgeschaltete magnetische Abschirmung zu verzichten.In order to shield the boiler side walls 6 from the magnetic field emanating from the active part of the transformer, it is expedient to produce the sheets 9 and 10 from a material which is both highly thermally and electrically conductive, for example aluminum or copper or steel. This makes it possible to dispense with a special magnetic shield connected upstream of the resonators.

Claims (9)

1. Transformator mit in einem Kessel aufgestellten, ölgekühlten Aktivteil aus einem Eisenkern und Wicklungen sowie mit schalldämpfenden Resonatoren zwischen dem Aktivteil und der Kesselwand, dadurch gekennzeichnet , - daß als Resonator zwei mindestens an ihren Rändern vakuumdicht miteinander verbundene Bleche (9, 10) dienen, - daß mindestens eines dieser Bleche (10) linsenartige in den Ölraum (8) hineinragende Ausbuchtungen (11) aufweist, - daß der Raum in den Ausbuchtungen (11) zwischen den Blechen (9 und 10) annähernd gasfrei und luftleer ist und - daß die Ausbuchtungen (11) durch im Öl (8) auftretende Schallschwingungen eingedrückt werden und dabei Schallenergie aufnehmen. 1. Transformer with an oil-cooled active part made of an iron core and windings installed in a boiler and with sound-absorbing resonators between the active part and the boiler wall, characterized in that - That serve as resonator two sheets (9, 10) connected to one another at least at their edges in a vacuum-tight manner, - That at least one of these sheets (10) has lens-like bulges (11) projecting into the oil space (8), - That the space in the bulges (11) between the sheets (9 and 10) is almost gas-free and air-free and - That the bulges (11) are depressed by sound vibrations occurring in the oil (8) and thereby absorb sound energy. 2. Transformator nach Anspruch 1, dadurch gekennzeichnet , daß die Tiefe der Ausbuchtungen (11) gleich der 5- bis 10-fachen Blechdicke ist.2. Transformer according to claim 1, characterized in that the depth of the bulges (11) is equal to 5 to 10 times the sheet thickness. 3. Transformator nach Anspruch 1 und 2, dadurch gekennzeichnet, daß die Eigenfrequenz eines jeweils eine Ausbuchtung (11) bildenden Blechausschnittes gleich der doppelten Netzfrequenz oder einem ganzzahligen Vielfachen hiervon ist.3. Transformer according to claim 1 and 2, characterized in that the natural frequency of a respective cutout forming a bulge (11) is equal to twice the mains frequency or an integer multiple thereof. 4. Transformator nach Anspruch 1 bis 3, dadurch gekennzeichnet , daß die einzelnen Ausbuchtungen (11) etwa kreisrund sind und einen Durchmesser von etwa 40 mm haben.4. Transformer according to claim 1 to 3, characterized in that the individual bulges (11) are approximately circular and have a diameter of approximately 40 mm. 5. Transformator nach Anspruch 4, dadurch gekennzeichnet , daß die Ausbuchtungen (11) in Reihen angeordnet sind und die zwischen ihnen liegenden Zwickel in gleicher Weise mit dem gegenüberliegenden Blech (9 bzw. 10) verbunden sind wie die Ränder.5. Transformer according to claim 4, characterized in that the bulges (11) are arranged in rows and the gusset between them are connected in the same way with the opposite plate (9 or 10) as the edges. 6. Transformator nach Anspruch 1 bis 5, dadurch gekennzeichnet , daß die zwei Bleche (9, 10) durch Löten oder Kleben miteinander verbunden sind, wobei das Lot bzw, der Klebstoff in Form einer Folie eingelegt ist, die bei Erwärmung die anliegenden Blechflächen benetzt und diese nach Abkühlung fest miteinander verbindet.6. Transformer according to claim 1 to 5, characterized in that the two sheets (9, 10) are connected to one another by soldering or gluing, the solder or the adhesive being inserted in the form of a film which wets the adjacent sheet metal surfaces when heated and firmly connects them together after cooling. 7. Transformator nach Anspruch 1 bis 6, dadurch gekennzeichnet , daß die einzelnen Resonatoren streifenförmig sind und zu kesselwandgroßen Tafeln zusammengesetzt sind.7. Transformer according to claim 1 to 6, characterized in that the individual resonators are strip-shaped and are assembled into boiler-wall-sized panels. 8. Transformator nach Anspruch 1 bis 7, dadurch gekennzeichnet , daß die Tafeln bzw. die einzelnen Resonatoren nahe vor der Innenseite der Kesselwand (5, 6, 7) frei aufgehängt sind.8. Transformer according to claim 1 to 7, characterized in that the panels or the individual resonators near the inside of the boiler wall (5, 6, 7) are freely suspended. 9. Transformator nach Anspruch 1 bis 8, dadurch gekennzeichnet , daß die Resonatoren aus je einem schwächeren (10), mit Ausbuchtungen (11) versehenen und je einem stärkeren (9) ebenen Aluminiumblech aufeinandergelötet sind und gleichzeitig als Schirmwand das im Ölraum (8) bestehende Magnetfeld von der Kesselwand (5, 6, 7) fernhalten.9. Transformer according to claim 1 to 8, characterized in that the resonators are each soldered to one another from a weaker (10), provided with bulges (11) and a stronger (9) flat aluminum sheet and at the same time as a screen wall in the oil chamber (8) Keep the existing magnetic field away from the boiler wall (5, 6, 7).
EP83110831A 1982-11-12 1983-10-28 Transformer with an oil-cooled active part and sound reducing resonators Withdrawn EP0109587A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3241932 1982-11-12
DE19823241932 DE3241932A1 (en) 1982-11-12 1982-11-12 TRANSFORMER WITH OIL-COOLED ACTIVE COMPONENT AND SOUND ABSORBING RESONATORS

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EP0109587A1 true EP0109587A1 (en) 1984-05-30

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JP (1) JPS59100506A (en)
BR (1) BR8306224A (en)
DE (1) DE3241932A1 (en)

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WO2012130579A3 (en) * 2011-03-28 2013-04-25 BSH Bosch und Siemens Hausgeräte GmbH Refrigerant circuit component and refrigerator

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GB1094618A (en) * 1964-03-13 1967-12-13 Smit & Willem & Co Nv Tank accommodating electrical apparatus and device for absorbing sound emitted thereby
GB1100904A (en) * 1964-09-17 1968-01-24 Parsons C A & Co Ltd Improvements in and relating to electro-magnetic induction apparatus
DE1260611B (en) * 1961-09-28 1968-02-08 Licentia Gmbh Liquid-insulated transformers or reactors with a sound-absorbing boiler cover
DE2834823B1 (en) * 1978-08-09 1979-10-25 Messerschmitt Boelkow Blohm Volume changing resonators based on the plate spring principle
CH618037A5 (en) * 1977-07-04 1980-06-30 Bschorr Oskar Arrangement for sound absorption with resonators of changeable volume
DE2947026B1 (en) * 1979-11-22 1980-11-27 Messerschmitt Boelkow Blohm Silators for noise reduction
DE3047341A1 (en) * 1979-12-18 1981-09-17 Hitachi, Ltd., Tokyo STATIC INDUCTION DEVICE

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Publication number Priority date Publication date Assignee Title
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GB1094618A (en) * 1964-03-13 1967-12-13 Smit & Willem & Co Nv Tank accommodating electrical apparatus and device for absorbing sound emitted thereby
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012130579A3 (en) * 2011-03-28 2013-04-25 BSH Bosch und Siemens Hausgeräte GmbH Refrigerant circuit component and refrigerator

Also Published As

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JPS59100506A (en) 1984-06-09
BR8306224A (en) 1984-06-19
DE3241932A1 (en) 1984-05-17

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