EP0152884A1 - Dispositif réducteur du bruit pour un appareil inductif à courant alternatif avec un noyau de fer - Google Patents

Dispositif réducteur du bruit pour un appareil inductif à courant alternatif avec un noyau de fer Download PDF

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Publication number
EP0152884A1
EP0152884A1 EP85101393A EP85101393A EP0152884A1 EP 0152884 A1 EP0152884 A1 EP 0152884A1 EP 85101393 A EP85101393 A EP 85101393A EP 85101393 A EP85101393 A EP 85101393A EP 0152884 A1 EP0152884 A1 EP 0152884A1
Authority
EP
European Patent Office
Prior art keywords
sound
front wall
wall
force
rear wall
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Withdrawn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
EP85101393A
Other languages
German (de)
English (en)
Inventor
Stellen Thorén
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 Norden Holding AB
Original Assignee
ASEA AB
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 ASEA AB filed Critical ASEA AB
Publication of EP0152884A1 publication Critical patent/EP0152884A1/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Withdrawn legal-status Critical Current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

Definitions

  • the present invention relates to a sound-absorbing device for an inductive AC device with an iron core according to the preamble of claim 1.
  • a sound-absorbing device for an inductive AC device with an iron core according to the preamble of claim 1.
  • Such a device is known from US-A-1 846 887.
  • the invention has for its object to develop a sound absorbing device of the type mentioned, which has a significantly greater sound absorbing effect.
  • the sound-absorbing device according to the invention is based on a principle which is significantly different from that of the known sound-absorbing panels. While the known sound absorbing plate is designed so that it absorbs the vibrations transmitted by the insulating liquid, these vibrations are reflected as much as possible in the sound absorbing plate according to the invention, the energy content of the vibrations in the insulating liquid in the area between the sound absorbing device and the core of the AC device is converted into heat.
  • all or the predominant part of the compressive forces which are transmitted from the front wall to the rear wall are transmitted by one or more elastically flexible force-transmitting elements.
  • all of the elastically designed force-transmitting elements lie within the cavity of the soundproofing plate.
  • more than 50%, preferably more than 70% of the total contact area between the front wall and force-transmitting elements is accounted for by elastic force-transmitting elements.
  • the side wall which delimits the above-mentioned cavity is resilient.
  • 1 denotes a transformer core which, together with its windings 2, is accommodated in a transformer tank 3 which is filled with insulating liquid, for example transformer oil.
  • insulating liquid for example transformer oil.
  • Several sound-absorbing plates 4 are welded to the inside of the vertical walls of the transformer tank by means of welded eyelets 11.
  • Each soundproofing plate 4 has a metallic front wall 6 lying opposite the iron core and a rectangular metallic rear wall 5 attached to the inside of the transformer tank.
  • a rigid side wall 10 connected to the front wall 6 in a gastight manner extends over the entire circumference of the front wall and is along the rear wall thereof entire - circumferentially welded gas-tight.
  • the front wall consists of a relatively thin-walled sheet 6 'and a metallic plate 7 which is welded or glued to the inside thereof.
  • the plate 11 is normally provided with at least four - in the illustrated case with nineteen through holes 12, into which the ends of metallic helical compression springs 8 are inserted are arranged between the front wall and the rear wall in a pressure-transmitting, load-bearing manner.
  • the springs 8 are dimensioned such that each has a natural frequency, the minimum least twice, preferably five times the nominal frequency of the AC device located in the housing 3.
  • the front wall 6 has a circumferential frame-shaped edge section, the width of which is denoted by a 1 on the narrow sides of the plate 7 and by a 2 on the wide sides of the plate 7.
  • the relatively thin edge section can be produced by plastic or machining.
  • the front wall 6 has an edge section which extends over all or most of its circumference, the average wall thickness of which is considerably less than the average total wall thickness of the front wall for the rest.
  • the thickness of the edge portion is less than 80 percent, preferably less than 60 percent, of the total wall thickness, and the average width of the edge portion is at least ten times, preferably at least twenty times, its average thickness.
  • the thickness of the thin-walled sheet 6 ′ is denoted by t 1
  • the thickness of the plate 7 is denoted by t 2
  • the rear wall 5 preferably has a constant thickness t 3 .
  • Their average thickness is preferably at least 100% greater than the wall thickness t 1 of the aforementioned edge section.
  • the side wall 10 is rigid and has an average thickness which is preferably less than 150% of the average wall thickness of the above-mentioned edge section.
  • the side wall 10 and / or the edge section can advantageously be provided with corrugated sections.
  • the space delimited by the front wall 6, the rear wall 5 and the side walls 10 has been more or less evacuated by an evacuation valve 13 welded to the sound-absorbing plate 4, which was closed by welding after the evacuation.
  • the pressure in the soundproofing plate 4 is less than 600 mbar, preferably less than 300 mbar, at room temperature and in the absence of an external liquid pressure.
  • the pressure in the soundproofing plate due to its compression, can take on a value which is somewhat larger, normally at most 50% larger, than when atmospheric pressure exclusively acts on the outer surface of the soundproofing plate.
  • the pressure in the soundproofing plate 4 at room temperature and liquid-filled transformer tank is normally less than 700 mbar, preferably less than 400 mbar, for example 100 mbar.
  • the front wall 6 'and the rear wall 5' together with the side wall 10 ' form a chamber 9' which is gas-filled in the same way as the chamber 9 described above.
  • the side wall 10 extends over the entire The circumference of the walls 5 'and 6' and consists of a bellows-like or corrugated, resilient body. The natural frequency of this body is at least twice the nominal frequency of the transformer 1. This bellows-like body 10 'forms the only resilient member of the sound damping plate. Alternatively, additional elastic members can be arranged within the chamber 9.
  • 70%, preferably 90% of the circumference should be designed to be elastically flexible.
  • a soundproofing plate according to the invention can have a smaller number of rigid spacer blocks in addition to resilient elements, for example if instead of plate 7 there are two plates, each of which is welded to the front wall 6 'in the same way as plate 7, which but at a distance from each other. Stiff spacer blocks can be arranged in this space between the two plates.
  • the soundproofing plate can be designed such that all the force-transmitting elements are designed to be elastic, for example in FIG. 5, or only a part of the force-transmitting elements is designed to be rigid, as in FIG. 4, where the side wall 10 is rigid and the springs 8 are elastic. If the area of the front wall against which the force-transmitting elements are in contact is defined as a "contact area", then at least 50%, preferably 70%, of the contact area should be accounted for by the elastic force-transmitting elements. In FIGS. 3 and 4, for example, the contact surface consists of the content of the circular surfaces denoted by 12 and the narrow edge surface formed by the side wall 10.
  • the muffler housing can also be constructed entirely or partially from glass fiber laminate or the like.
  • the invention also includes the case where a wall section of the transformer tank is welded to the side wall of the soundproofing plate and forms the rear wall thereof.
  • a front wall with a constant wall thickness instead of a front wall with a relatively thin edge section.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Regulation Of General Use Transformers (AREA)
  • Exhaust Silencers (AREA)
EP85101393A 1984-02-14 1985-02-09 Dispositif réducteur du bruit pour un appareil inductif à courant alternatif avec un noyau de fer Withdrawn EP0152884A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8400776A SE441317B (sv) 1984-02-14 1984-02-14 Ljuddempande anordning
SE8400776 1984-02-14

Publications (1)

Publication Number Publication Date
EP0152884A1 true EP0152884A1 (fr) 1985-08-28

Family

ID=20354733

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85101393A Withdrawn EP0152884A1 (fr) 1984-02-14 1985-02-09 Dispositif réducteur du bruit pour un appareil inductif à courant alternatif avec un noyau de fer

Country Status (4)

Country Link
US (1) US4558296A (fr)
EP (1) EP0152884A1 (fr)
JP (1) JPS60189209A (fr)
SE (1) SE441317B (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994018616A1 (fr) * 1993-02-09 1994-08-18 Noise Cancellation Technologies, Inc. Panneau d'affaiblissement de transmission eleve
SE514509C2 (sv) 1999-06-28 2001-03-05 Abb Ab stationär ljudisolerande anordning, stationär induktionsmaskin samt användning av en sådan induktionsmaskin
AU2001288421A1 (en) * 2000-08-25 2002-03-04 Acentech, Inc. Noise cancellation using a mechanical oscillator
DE102005045844B3 (de) * 2005-09-26 2007-02-01 Airbus Deutschland Gmbh Schalldämmelement und Verfahren zur Herstellung eines Schalldämmelements
JP5326472B2 (ja) * 2007-10-11 2013-10-30 ヤマハ株式会社 吸音構造
EP2085962A2 (fr) * 2008-02-01 2009-08-05 Yamaha Corporation Structure absorbant les sons et composant de véhicule doté de propriétés absorbant les sons
US20090223738A1 (en) * 2008-02-22 2009-09-10 Yamaha Corporation Sound absorbing structure and vehicle component having sound absorption property
US11021870B1 (en) * 2013-03-14 2021-06-01 Hrl Laboratories, Llc Sound blocking enclosures with antiresonant membranes
EP3065129B1 (fr) * 2015-03-02 2018-10-03 Siemens Aktiengesellschaft Agencement destiné à la réduction d'émission sonore d'un transformateur ou d'un dispositif d'étranglement
US9646761B2 (en) * 2015-07-28 2017-05-09 Fortune Electric Co., Ltd. Power transmission transformer with a noise inhibiting function
MX355305B (es) * 2015-10-14 2018-04-12 Prolec Ge Int S De R L De C V Paneles acústicos para transformador.
CN105609264B (zh) * 2016-01-19 2017-12-19 江西理工大学 一种采用微穿孔板的非晶合金油浸式变压器
GB2548139B (en) * 2016-03-10 2020-03-18 General Electric Technology Gmbh Improvements in or relating to sound reduction components for housings
CN107424739A (zh) * 2017-08-08 2017-12-01 芜湖市凯鑫避雷器有限责任公司 一种干式变压器的底座安装装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1011057B (de) * 1954-11-04 1957-06-27 Licentia Gmbh Geraeuscharmer Transformator, bei dem die Geraeuschdaemmung durch an der Kesselinnenwand angeordnete elastische und mit Luft bzw. Gas gefuellte Daemmfaecher erreicht wird
DE1111726B (de) * 1954-05-28 1961-07-27 Licentia Gmbh Fluessigkeitsgekuehlter, geraeuschgedaempfter Transformator
DE1260611B (de) * 1961-09-28 1968-02-08 Licentia Gmbh Fluessigkeitsisolierte Transformatoren oder Drosselspulen mit schalldaemmender Kesselabdeckung
DE1538130A1 (de) * 1966-01-19 1969-08-21 Siemens Ag Befestigung von Schalldaemmwaenden an den Behaelterwaenden von Schallerzeugern
DE2834823B1 (de) * 1978-08-09 1979-10-25 Messerschmitt Boelkow Blohm Volumenaendernde Resonatoren nach dem Tellerfeder-Prinzip
CH618037A5 (en) * 1977-07-04 1980-06-30 Bschorr Oskar Arrangement for sound absorption with resonators of changeable volume
JPS57104209A (en) * 1980-12-22 1982-06-29 Hitachi Ltd Stationary inductive apparatus

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1846887A (en) * 1930-05-24 1932-02-23 Gen Electric Electrical induction apparatus
US3305813A (en) * 1961-11-21 1967-02-21 Mc Graw Edison Co Cooling and noise reducing arrangement for stationary induction apparatus
US3260974A (en) * 1963-09-12 1966-07-12 Westinghouse Electric Corp Noise reducing means for electrical apparatus
US4347043A (en) * 1980-06-02 1982-08-31 Carrier Corporation Motor compressor unit and a method of dampening sound waves generated therein

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1111726B (de) * 1954-05-28 1961-07-27 Licentia Gmbh Fluessigkeitsgekuehlter, geraeuschgedaempfter Transformator
DE1011057B (de) * 1954-11-04 1957-06-27 Licentia Gmbh Geraeuscharmer Transformator, bei dem die Geraeuschdaemmung durch an der Kesselinnenwand angeordnete elastische und mit Luft bzw. Gas gefuellte Daemmfaecher erreicht wird
DE1260611B (de) * 1961-09-28 1968-02-08 Licentia Gmbh Fluessigkeitsisolierte Transformatoren oder Drosselspulen mit schalldaemmender Kesselabdeckung
DE1538130A1 (de) * 1966-01-19 1969-08-21 Siemens Ag Befestigung von Schalldaemmwaenden an den Behaelterwaenden von Schallerzeugern
CH618037A5 (en) * 1977-07-04 1980-06-30 Bschorr Oskar Arrangement for sound absorption with resonators of changeable volume
DE2834823B1 (de) * 1978-08-09 1979-10-25 Messerschmitt Boelkow Blohm Volumenaendernde Resonatoren nach dem Tellerfeder-Prinzip
JPS57104209A (en) * 1980-12-22 1982-06-29 Hitachi Ltd Stationary inductive apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, Band 6, Nr. 189 (E-133)[1067], 28. September 1982; & JP - A - 57 104 209 (HITACHI SEISAKUSHO K.K.) 29.06.1982 *

Also Published As

Publication number Publication date
JPS60189209A (ja) 1985-09-26
SE8400776L (sv) 1985-08-15
SE441317B (sv) 1985-09-23
US4558296A (en) 1985-12-10
SE8400776D0 (sv) 1984-02-14

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19860429

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Inventor name: THOREN, STELLEN