EP3065129B1 - Agencement destiné à la réduction d'émission sonore d'un transformateur ou d'un dispositif d'étranglement - Google Patents

Agencement destiné à la réduction d'émission sonore d'un transformateur ou d'un dispositif d'étranglement Download PDF

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Publication number
EP3065129B1
EP3065129B1 EP15157123.9A EP15157123A EP3065129B1 EP 3065129 B1 EP3065129 B1 EP 3065129B1 EP 15157123 A EP15157123 A EP 15157123A EP 3065129 B1 EP3065129 B1 EP 3065129B1
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EP
European Patent Office
Prior art keywords
spring
metal
boiler
transformer
membrane
Prior art date
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Application number
EP15157123.9A
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German (de)
English (en)
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EP3065129A1 (fr
Inventor
Maximilian Brunnegger
Helmut Pregartner
Horst RECHBERGER
Monther Sari
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
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Siemens AG
Siemens Corp
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Priority to EP15157123.9A priority Critical patent/EP3065129B1/fr
Publication of EP3065129A1 publication Critical patent/EP3065129A1/fr
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Publication of EP3065129B1 publication Critical patent/EP3065129B1/fr
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Classifications

    • 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
    • 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
    • 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

Definitions

  • the invention relates generally to the technical field of electrical transformers and chokes, with an active part, which is arranged in a boiler and surrounded by an insulating and cooling liquid.
  • the DE 10 2005 045844 b1 shows a Schalldämmelement with two wall surfaces which are interconnected by a plurality of prestressed spring elements.
  • a sound-absorbing device for an inductive AC device in which in the housing of the device, a hollow acoustic damping plate is arranged, which is filled with gas and at least one force-transmitting element, which is arranged so that there are compressive forces between the front and rear walls of the sound attenuation plate able to transfer.
  • the US 2007 / 014418A1 shows a vibratory vibrator with dynamic tuning, in which the sound radiation of a vibrating surface is reduced by coupling a rigid structure to the vibrating surface with a resilient element.
  • the DE 11 11 726 B describes a liquid-cooled, noise-damped transformer with arranged on the boiler inner walls sound insulation compartments, which are designed as bellows-like suspension body.
  • At least one volume-elastic panel is provided in the interior of the boiler.
  • the panel has a vacuum applied to the cavity, which is at least partially bounded by a metal membrane.
  • a metallic spring means is provided, which is supported on the metal diaphragm under a bias voltage. This ensures that liquid sound waves that propagate in the insulation and cooling liquid in the longitudinal direction are at least partially absorbed by the elastic deformation of the metal membrane. The sound energy is absorbed by the deformation work of the metal membrane and the metallic spring.
  • the stiffness is determined by the interaction of metal membrane, spring element and applied negative pressure.
  • each volume-elastic panel is formed in each case by two mutually opposite metal membranes and a peripheral rigid membrane frame.
  • Each metal membrane is attached to the membrane frame liquid-tight or gas-tight, for example, by a welded joint or solder joint.
  • the spring device is supported on one and on the other metal diaphragm under bias.
  • the rigidity of the volume-elastic element or panel can be predetermined in a simple manner by the negative pressure set in the cavity and the preload between spring and metal membrane. This facilitates the adaptation to different sizes and types of transformers or chokes.
  • the spring device is a flat-shaped spring which has bow-shaped leaf-spring elements which alternately engage in each case on one of the two metal diaphragms are supported. This allows the Damping effect can be maintained almost unchanged over many years, without requiring additional maintenance would be required.
  • the alternately bow-shaped, protruding leaf spring ribs can be easily punched and bent from a metal sheet. The production costs are low.
  • Another preferred embodiment of the invention is characterized in that the flat shape spring is bent to an omega shape. Even with this omega-shape of the spring is achieved that the mechanical wear between the metal diaphragm and metallic spring element is so low that the reliability of the damping effect over a long period of operation without special maintenance is possible.
  • Leaf spring or omega spring can be easily produced as stamped and bent moldings, the production is particularly simple and inexpensive.
  • an embodiment in which the spring device is a wire mesh, which is arranged adjacent to the inner surface of each metal diaphragm, can also be favorable.
  • the cavity can be completely or only partially filled with such a wire mesh.
  • the volume-elastic panel has a prismatic basic body. Due to this plate shape, the placement in the boiler of a transformer is usually possible without major structural changes.
  • a closable opening for example a threaded hole, is provided for producing the negative pressure in the cavity.
  • the negative pressure can be generated in a simple manner in the production of the volume-elastic panel and the tight closure of the opening can be done easily by a sealing screw.
  • FIG. 1 shows in a plan view of a boiler 1 of a transformer, an active part 2 in an insulating and cooling liquid 4.
  • a plurality of plate-shaped volume-elastic panels 3 are arranged in an intermediate region 11 between the active part 2 and boiler wall. These panels 3 have a distance both to the boiler wall and to the windings or to the yoke of the active part 2.
  • these panels 1 are arranged vertically suspended in the boiler, wherein the fastening means are not shown.
  • the cross section of the panels 3 is rectangular.
  • the prismatic body can be accommodated in a simple manner in the interior of the boiler 1.
  • FIG. 2 shows a side view of the illustration according to FIG. 1 .
  • On display are the vertically arranged panels 3, which extend over the entire length of the core leg of the active part 2. The vertical length can reach more than 10 m for a power transformer.
  • On the panel 3 acts in such an arrangement, a hydrostatic pressure of about 1 bar.
  • panels 3 are shown, which are arranged in a gap 11 between the cover and the bottom part of the boiler 1.
  • each of these volume-elastic panels 3 acts with respect to the liquid sound waves as a resilient metal bellows, a so-called "metal bellow".
  • the goal here is, by a yielding Deformation behavior to reduce the pressure pulsations in the boiler 1.
  • the liquid sound waves may have pressure fluctuations in the amount of about 100 mbar.
  • FIG. 1 and FIG. 3 illustrated arrangement of the panels 3 in the interior of the boiler 1 is achieved that emitted by the active part 2 pressure pulsations of the insulating and cooling liquid 4 are reduced by the panels 3 in their intensity. Consequently, the accumulating on the walls of the boiler 1 liquid sound waves are less energetic in intensity. The vibration excitation of the boiler walls is lower. The boiler radiates less operating noise. In addition, the mechanical design of the boiler 1 is relieved. The rigid coupling between the active part and boiler 1 is less strong. This also reduces the dynamic load that acts on the boiler.
  • volume-elastic panels 3 will now be shown in more detail and explained in more detail in their effect.
  • FIG. 3 shows a first embodiment of a volume-elastic panel 3.
  • the volume-elastic panel 3 consists of a rigid rectangular cross-section frame 8, the front side each spans a surface which is covered with a metal membrane 6 and 6 '.
  • the metal membrane 6, 6 ' is a flat thin-walled steel sheet, which is fixed on the membrane frame 8 at the edge by a continuous weld.
  • the connection between metal diaphragm 6 or 6 'and frame 8 is sealed, both to liquid and to gas.
  • a spring element 7 is arranged in the cavity 5.
  • the spring element 7 is in the illustrated embodiment, a flat shape-spring which bow-shaped leaf spring elements 9 has.
  • each of the leaf springs 7 yields elastically, in both the one and the other direction of deformation. Since the spring device 7 is not bounded laterally, it differs in its planar extension, which is best based on the section AA in FIG. 4 can be seen.
  • the spring element 7 can be seen in a perspective view.
  • the flat-form spring consists of adjacent parallel leaf spring elements 9. These elements 9 are rib-shaped. Parallel ribs are alternately bent bow-shaped on one side and then on the other side.
  • Each bracket 9 opens in each case with its end in a peripheral fixing region 12.
  • the material used is a rust-resistant spring steel sheet. The transition between bracket 9 and fixing area 12 is of uniform material.
  • FIG. 6 shows in a cross-sectional view of another embodiment of the spring element 7.
  • the spring element 7 is an omega-shaped spring made of a stainless spring steel.
  • This omega spring lies again with its to the metal membrane 6, 6 'showing mushroom-shaped sections flat on the inner surface of a metal membrane 6 and 6 'at. This again ensures that the friction partners 6 and 6 and 7 lie flat against each other, whereby the wear is very low. The damping characteristic is therefore unchanged over a long period of operation.
  • FIG. 7 finally shows a third embodiment of the volume-elastic panel 3, in which the spring element 7 is formed by a metal mesh in the interior 5.
  • the spring element 7 and the frame 8 and metal membranes 6, 6 'made of a stainless steel This has the advantage that corrosion-induced aging is hardly to be expected even during a long period of operation, as a result of which the liquid-sound absorption effect of the panel 3 is also retained.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Vibration Prevention Devices (AREA)

Claims (5)

  1. Agencement pour la réduction de l'émission sonore d'un transformateur électrique ou d'un dispositif d'étranglement, comportant :
    - un chaudron (1) qui est rempli d'un liquide d'isolation et de refroidissement (4),
    - une partie active (2) qui est disposée dans le chaudron (1),
    - dans lequel il est prévu dans le chaudron (1) au moins un panneau élastique en volume (3), lequel est entouré du liquide d'isolation et de refroidissement (4) et comprend une cavité (5) soumise à une pression négative,
    - dans lequel la cavité (5) est délimitée au moins en partie par au moins une membrane métallique (6, 6') de telle sorte que le volume de cavité soit modifiable lors d'une variation de pression du liquide d'isolation et de refroidissement (4),
    - dans lequel il est prévu dans la cavité (5) un dispositif à ressort (7) produit à partir d'un métal qui, sous une précontrainte, s'appuie sur l'au moins une membrane métallique (6, 6'),
    - dans lequel l'au moins un panneau élastique en volume (3) est formé de deux membranes métalliques (6, 6') opposées l'une à l'autre et d'un cadre de membrane (8) rigide périphérique, dans lequel chaque membrane métallique (6, 6') est fixée de manière étanche sur le cadre de membrane (8), et dans lequel le dispositif à ressort (7) s'appuie sur l'une et sur l'autre membrane métallique (6, 6'),
    - dans lequel la précontrainte du dispositif à ressort (7) est dépendante de l'action de la pression négative, dans lequel le dispositif à ressort (7) est un ressort de forme plate, lequel comprend des éléments de ressort à lame (9) en forme d'étrier (Figure 4) qui s'appuient en alternance respectivement sur l'une des deux membranes métalliques (6, 6') et se terminent en une zone de fixation,
    - caractérisé en ce que
    - le ressort de forme plate présente une forme en oméga.
  2. Transformateur ou dispositif d'étranglement selon la revendication 1, caractérisé en ce que le panneau élastique en volume (3) comprend un corps de base prismatique.
  3. Transformateur ou dispositif d'étranglement selon l'une des revendications 1 à 2, caractérisé en ce que le matériau à partir duquel sont formés le cadre de membrane (8), le treillis métallique, le ressort de forme plate est un métal résistant à la corrosion.
  4. Transformateur ou dispositif d'étranglement selon la revendication 1, caractérisé en ce que sur le cadre de membrane (8) est constituée une ouverture (10) pouvant être obturée pour la production d'une pression négative dans la cavité (5).
  5. Transformateur ou dispositif d'étranglement selon l'une des revendications précédentes, caractérisé en ce que l'au moins un panneau élastique en volume (3) est disposé dans un espace intermédiaire (11) entre la partie active (2) et le chaudron (1).
EP15157123.9A 2015-03-02 2015-03-02 Agencement destiné à la réduction d'émission sonore d'un transformateur ou d'un dispositif d'étranglement Active EP3065129B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15157123.9A EP3065129B1 (fr) 2015-03-02 2015-03-02 Agencement destiné à la réduction d'émission sonore d'un transformateur ou d'un dispositif d'étranglement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15157123.9A EP3065129B1 (fr) 2015-03-02 2015-03-02 Agencement destiné à la réduction d'émission sonore d'un transformateur ou d'un dispositif d'étranglement

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EP3065129A1 EP3065129A1 (fr) 2016-09-07
EP3065129B1 true EP3065129B1 (fr) 2018-10-03

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020212257A1 (de) 2020-09-29 2022-03-31 Siemens Energy Global GmbH & Co. KG Transformator

Family Cites Families (6)

* 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
GB971765A (en) 1961-03-20 1964-10-07 Parsons C A & Co Ltd Improvements in and relating to sound insulation
SE441317B (sv) * 1984-02-14 1985-09-23 Asea Ab Ljuddempande anordning
SE514509C2 (sv) * 1999-06-28 2001-03-05 Abb Ab stationär ljudisolerande anordning, stationär induktionsmaskin samt användning av en sådan induktionsmaskin
US20070014418A1 (en) * 2005-07-14 2007-01-18 Eatwell Graham P Vibration excited sound absorber with dynamic tuning
DE102005045844B3 (de) * 2005-09-26 2007-02-01 Airbus Deutschland Gmbh Schalldämmelement und Verfahren zur Herstellung eines Schalldämmelements

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
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