EP0585772A1 - Réduction du bruit émis pour des transformateurs - Google Patents

Réduction du bruit émis pour des transformateurs Download PDF

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Publication number
EP0585772A1
EP0585772A1 EP93113452A EP93113452A EP0585772A1 EP 0585772 A1 EP0585772 A1 EP 0585772A1 EP 93113452 A EP93113452 A EP 93113452A EP 93113452 A EP93113452 A EP 93113452A EP 0585772 A1 EP0585772 A1 EP 0585772A1
Authority
EP
European Patent Office
Prior art keywords
sound insulation
transformer
sound
interference
emitted
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.)
Withdrawn
Application number
EP93113452A
Other languages
German (de)
English (en)
Inventor
Ferdinand Dr. Lutz
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.)
ABB Patent GmbH
Original Assignee
ABB Patent GmbH
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 ABB Patent GmbH filed Critical ABB Patent GmbH
Publication of EP0585772A1 publication Critical patent/EP0585772A1/fr
Withdrawn legal-status Critical Current

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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
    • H01F27/33—Arrangements for noise damping
    • 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

Definitions

  • the invention relates to a method for reducing the noise emission from transformers and a device for performing this method.
  • Transformers are devices for converting a single or multi-phase voltage into a higher or lower voltage of the same frequency, for example 50 Hz. Due to the sinusoidal course of the AC voltage, the resulting sound waves have twice the frequency as a result of the periodic magnetic reversal of the transformer windings including the iron core. The sound waves are emitted virtually undamped via the surrounding housing, in the case of liquid-insulated transformers, and often reach an impermissibly high sound level. Accordingly, when designing power transformers, in addition to complying with the electrical requirements, the requirements for sound insulation must also be observed.
  • the usual methods for reducing the sound often include measures to reduce the sound generated at the point of origin, for example by lowering the core induction, or for insulating the sound by obstructing the propagation of sound by means of reflecting obstacles as well as for sound attenuation by absorption, i.e. destruction of the sound energy within suitable materials by conversion into another form of energy, e.g. B. heat.
  • the transformer in question is provided on at least one side with a sound insulation wall, the wall side of the sound insulation wall facing the transformer having concentrators for the emitted sound waves which are formed by inlet openings and which have an inwardly narrowing cross section and each lead into a channel that first interference sound insulation elements are arranged in the sound path, which are designed for the lowest emitted frequency, that second interference sound insulation elements are provided in the sound insulation wall, which are designed for twice the value of the lowest emitted frequency are and that the first and second interference sound insulation elements are connected to one another in acoustic series connection.
  • the sound insulation wall provided for sound insulation can surround the transformer in question on all sides or only partially, depending on what the local sound insulation requirements are. However, it must always be ensured that the dimensions of the sound insulation wall are sufficiently matched to the geometry of the sound propagation.
  • first and second interference sound insulation elements are designed as bypass interference sound insulation elements.
  • the interference sound insulation elements are used as resonance dampers executed, each resonance damper is designed as a stub.
  • the cross-section of the stub corresponds to the sum of the cross-sections of the channel leading to the stub and the channel leading away from the stub.
  • the device according to the invention for reducing the noise emission of transformers which relates to a transformer with a transformer housing enclosing a transformer core and absorbing the insulating liquid, it is provided that further channels are arranged in the sound insulation wall primarily perpendicular to the channels provided for the formwork line through which insulating liquid is passed.
  • the cooling fins usually arranged on the outer wall of the housing which bring about a substantial enlargement of the housing surface and thus at the same time an increase in the radiation surface for sound waves, as low as possible, since the cooling of the insulating liquid heated due to operation is now in a silenced area takes place.
  • the cooling point is spatially separated from the heating point and, at the same time, its noise emission is significantly reduced due to the reduced surface area of the transformer housing.
  • a further advantageous embodiment of the invention provides that the inlet openings as well as the interference sound insulation elements consist of extruded profiles, preferably of aluminum alloy, and / or of sheet metal.
  • the inventive design of the sound insulation walls using inlet openings as well as first interference sound insulation elements that have the lowest emitted frequency and second interference sound insulation elements that have twice the value of the lowest emitted frequency are designed, in accordance with the method according to the invention, after passing through the sound waves through the sound insulation walls, there is advantageously an extinction of the sound waves both for the fundamental frequency and for all harmonics which are a multiple of the fundamental frequency.
  • the sound waves of the lowest emitted frequency and all harmonics that have an odd multiple of this frequency are extinguished in the first interference sound insulation elements according to the invention, which are designed for the lowest emitted frequency.
  • the sound insulation wall 16 is formed from individual, uniformly designed modules 18 which, when attached to one another, produce the sound wall 16.
  • Each module 18 is connected to the housing 12 of the transformer 10 via pipe connections 20 on its upper side. Insulating liquid for cooling is passed through this pipe connection 20.
  • each module 18 On its parallel surface facing away from the housing 12 of the transformer 10, each module 18 has a sound exit opening 22 through which residual sound exit After the sound emitted from the longitudinal side of the transformer and picked up by the modules 18 by means of sound inlet openings 24, which are not recognizable here, but shown in FIGS. 2 and 3, has passed through the first and second interference sound insulation elements located in the sound insulation wall 16.
  • FIG. 2 shows a cross section through several modules 18 of a sound insulation wall 16 according to the invention, in which two sound inlet openings 24 are arranged next to one another and connected to channels 26.
  • First and second interference sound insulation elements 28, 29 are arranged on both sides of the channels 26 and are designed as resonance dampers with a stub line.
  • the module shown is made from extruded profile, or from the combination of extruded profiles and connecting plates. Within the profiles, predominantly perpendicular to the channels provided for the formwork line 26, further tubular channels 30 are provided, which are used to pass the insulating liquid.
  • extruded profiles are advantageous both in terms of manufacturing costs, especially when using appropriate aluminum alloys, and in terms of the good heat transfer from the insulating liquid flowing in the channels 30 to the profiles and the sheets attached to them.
  • the large surface area ensures good heat transfer to the surrounding air.
  • channels 27 are formed which have the function of resonance dampers as spur lines.
  • the shorter stub lines 29 are designed for twice the value of the lowest emitted frequency, while the longer stub lines 28 are designed for the lowest emitted frequency.
  • FIG. 3 shows a cross section through a sound insulation wall 16, in which the first and second interference sound insulation elements 32, 33 are designed as diversion interference sound insulation elements.
  • inlet openings 24 are provided, through which the sound impinging on the sound insulation wall 16 is conducted into the channels 27.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Regulation Of General Use Transformers (AREA)
EP93113452A 1992-08-27 1993-08-24 Réduction du bruit émis pour des transformateurs Withdrawn EP0585772A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4228101 1992-08-27
DE19924228101 DE4228101A1 (de) 1992-08-27 1992-08-27 Minderung der Schallemission von Transformatoren

Publications (1)

Publication Number Publication Date
EP0585772A1 true EP0585772A1 (fr) 1994-03-09

Family

ID=6466309

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93113452A Withdrawn EP0585772A1 (fr) 1992-08-27 1993-08-24 Réduction du bruit émis pour des transformateurs

Country Status (2)

Country Link
EP (1) EP0585772A1 (fr)
DE (1) DE4228101A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114156068A (zh) * 2021-12-09 2022-03-08 国网福建省电力有限公司 一种变压器用复合吸隔声板
EP4404221A1 (fr) * 2023-01-20 2024-07-24 Hitachi Energy Ltd Dispositif de réduction du bruit provoqué par un transformateur et système

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008061552A1 (de) 2008-12-11 2010-07-01 Areva Energietechnik Gmbh Verfahren und Vorrichtung zur Geräuschminderung für einen elektrischen Transformator
US9607600B2 (en) 2009-02-06 2017-03-28 Sonobex Limited Attenuators, arrangements of attenuators, acoustic barriers and methods for constructing acoustic barriers
FR2959859B1 (fr) * 2010-05-05 2013-06-28 Areva T & D Sas Appareillage electrique a haute ou moyenne tension comprenant une partie active par induction immergee, a bruit reduit
GB201415873D0 (en) * 2014-09-08 2014-10-22 Sonobex Ltd Apparatus And Method
US11549414B1 (en) * 2019-11-07 2023-01-10 Phillip M. Adams Sound attenuator apparatus and method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2043030A (en) * 1935-04-02 1936-06-02 Maxim Silencer Co Sound attenuating device
FR2300384A1 (fr) * 1975-02-07 1976-09-03 Lockheed Aircraft Corp Absorbeur acoustique a double bande
DE3023097A1 (de) * 1979-06-22 1981-01-08 Hitachi Ltd Induktionsvorrichtung mit vibrationsdaempfer
US4339018A (en) * 1978-10-27 1982-07-13 Lord Corporation Sound absorbing structure
US4373608A (en) * 1979-12-20 1983-02-15 General Electric Company Tuned sound barriers
US4840251A (en) * 1987-09-30 1989-06-20 Bridgestone Corporation Noise reducing apparatus

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT217552B (de) * 1958-12-17 1961-10-10 Mc Graw Edison Co Einrichtung zur Geräuschverminderung bei stationären, in flüssigkeitsgefüllten Gehäusen untergebrachten elektrischen Induktionsapparaten, insbesondere Öltransformatoren
US3102246A (en) * 1958-12-17 1963-08-27 Mc Graw Edison Co Noise reducing means for transformer
AT218607B (de) * 1959-05-23 1961-12-11 Siemens Ag Anordnung zur Geräuschdämpfung von mit schallhartem Material gekapselten und mit Dämmfächern versehenen Schallerzeugern, insbesondere Transformatoren
JPS5760815A (en) * 1980-09-30 1982-04-13 Hitachi Ltd Stationary induction apparatus
JPS58143510A (ja) * 1982-02-20 1983-08-26 Hitachi Ltd 静止誘導電器
DE3935350A1 (de) * 1989-10-24 1991-04-25 Ulrich Grajecki Gmbh & Co Dipl Lueftungsoeffnung in schalldaemmender ausfuehrung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2043030A (en) * 1935-04-02 1936-06-02 Maxim Silencer Co Sound attenuating device
FR2300384A1 (fr) * 1975-02-07 1976-09-03 Lockheed Aircraft Corp Absorbeur acoustique a double bande
US4339018A (en) * 1978-10-27 1982-07-13 Lord Corporation Sound absorbing structure
DE3023097A1 (de) * 1979-06-22 1981-01-08 Hitachi Ltd Induktionsvorrichtung mit vibrationsdaempfer
US4373608A (en) * 1979-12-20 1983-02-15 General Electric Company Tuned sound barriers
US4840251A (en) * 1987-09-30 1989-06-20 Bridgestone Corporation Noise reducing apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114156068A (zh) * 2021-12-09 2022-03-08 国网福建省电力有限公司 一种变压器用复合吸隔声板
CN114156068B (zh) * 2021-12-09 2023-06-27 国网福建省电力有限公司 一种变压器用复合吸隔声板
EP4404221A1 (fr) * 2023-01-20 2024-07-24 Hitachi Energy Ltd Dispositif de réduction du bruit provoqué par un transformateur et système
WO2024153808A1 (fr) * 2023-01-20 2024-07-25 Hitachi Energy Ltd Dispositif de réduction du bruit provoqué par un transformateur et système

Also Published As

Publication number Publication date
DE4228101A1 (de) 1994-03-03

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