EP2569558A2 - Traversée de transformateur - Google Patents

Traversée de transformateur

Info

Publication number
EP2569558A2
EP2569558A2 EP11707087A EP11707087A EP2569558A2 EP 2569558 A2 EP2569558 A2 EP 2569558A2 EP 11707087 A EP11707087 A EP 11707087A EP 11707087 A EP11707087 A EP 11707087A EP 2569558 A2 EP2569558 A2 EP 2569558A2
Authority
EP
European Patent Office
Prior art keywords
shaft
sealing unit
sealing
receptacle
unit
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Withdrawn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
EP11707087A
Other languages
German (de)
English (en)
Inventor
Andreas Fiolka
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.)
Maschinenfabrik Reinhausen GmbH
Scheubeck GmbH and Co
Original Assignee
Maschinenfabrik Reinhausen GmbH
Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG
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 Maschinenfabrik Reinhausen GmbH, Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG filed Critical Maschinenfabrik Reinhausen GmbH
Publication of EP2569558A2 publication Critical patent/EP2569558A2/fr
Withdrawn legal-status Critical Current

Links

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
    • H01F27/02—Casings
    • H01F27/04—Leading of conductors or axles through casings, e.g. for tap-changing arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/0005—Tap change devices
    • H01H9/0044—Casings; Mountings; Disposition in transformer housing
    • H01H2009/005—Details concerning the sealing of the oil filled casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/0005—Tap change devices
    • H01H9/0044—Casings; Mountings; Disposition in transformer housing

Definitions

  • the invention relates to a transformer bushing according to the preamble of patent claim 1.
  • Transformers are known from the prior art, on the outside of the housing, a diverter is arranged for powerless switching between two windings of the transformer. Recent developments go, the diverter no longer directly under the transformer cover, i. in the outer region of the transformer, but to arrange directly on the active part of the transformer. For the operation of the arranged in the interior of the transformer housing Umsetzers it is particularly necessary to guide a shaft through the transformer housing to effect by means of a motor or a manual drive outside the transformer housing, a changeover of the transformer.
  • a passage of the shaft through a lateral housing wall is advantageous, in particular at a height that the shaft-connected manual drive in one of the operator easily achievable working height is above the footprint of the transformer.
  • This first sealing unit comprises a sealing element, for example an O-ring or a shaft sealing ring, by means of which the passage opening is sealed.
  • the disadvantage here is that when the shaft is guided through the transformer housing at the side, a replacement or maintenance of the first sealing unit is achieved by draining or pumping off the inside of the transformer housing. This oil is associated. Thus, the maintenance or replacement of the first seal unit is very time consuming and costly for the transformer operator.
  • the essential aspect of the invention is that, in addition to the first sealing unit, at least one second sealing unit is provided, which is arranged interchangeably in the shaft receptacle.
  • this second sealing unit seals the shaft guided by the shaft receiver. If the second seal unit leaking due to aging, fatigue, damage or the like, so can be maintained or replaced by the interchangeable design of the second seal unit and their interchangeable arrangement in the shaft receiving, in which case the first sealing unit takes over the sealing of the shaft relative to the shaft , Thus, even with a transformer filled with oil, leakage-free or at least virtually leak-free maintenance is particularly advantageous. an exchange of the second sealing unit, possible.
  • the second sealing unit is accessible from the outside and in particular in the direction of the outer space surrounding the transformer of the first sealing unit upstream, so that the second sealing unit can be changed or maintained from the outside and thus time-saving.
  • a particularly user-friendly change of the second sealing unit is achieved in that the second sealing unit at least partially received in a connectable to the shaft receiving socket or a seal plate is.
  • the first sealing unit is formed by a mechanically, hydraulically or pneumatically expandable or deformable seal.
  • Means are provided within the shaft receptacle which either directly effect a deformation or expansion of the first sealing unit or at least form a channel for the supply of a pressurized medium, which causes a deformation or expansion of the first sealing unit.
  • the medium for deforming or expanding the first sealing unit may be, for example, a fluid or a gas, which causes the expansion or deformation by penetrating into an inner space of the first sealing unit and thus seals the shaft against the shaft receptacle and also to the transformer interior.
  • At least one second channel is provided in the shaft receptacle adjacent to the first channel for introducing a pressurized medium into the interior of the first seal unit, which connects the limited by the first seal unit, the second seal unit, the shaft and the shaft receiving space with the outside space ,
  • This second channel can be done after the change or the maintenance of the second seal unit, a venting of the aforementioned space.
  • the venting is effected by a subsequent flow of the oil located in the housing interior of the transformer in the second channel, so that in the escape of oil from the open to the outside free end of the second channel all air has escaped from the space between the first and second seal unit.
  • electrical flashovers inside the transformer can be avoided by rising air bubbles.
  • the first sealing unit may be formed, for example, by conventional sealing elements known from the prior art Be formed by a pair of shaft seals.
  • the first sealing unit is subject to a similar wear or a similar aging as the second sealing unit arranged interchangeably on the shaft holder, so that even this first sealing unit may possibly have a slight leakage after prolonged operation.
  • an exchange or maintenance of the second sealing element is also possible in this case, without the oil in the housing interior of the transformer would have to be drained or pumped.
  • the main advantage compared to the deformable or expandable first seal unit according to the first embodiment is that the transformer bushing has a much simpler structure and thus can be produced more cheaply.
  • FIG. 1 shows by way of example a shaft feedthrough according to the invention through a transformer housing in a lateral sectional view along the shaft longitudinal axis;
  • FIG. 2 shows an example of a shaft bushing according to Figure 1 in a sectional view in the region of the first and second sealing unit and 3 shows by way of example a second exemplary embodiment of a shaft bushing according to FIG. 1 in a detail view in the area of the first and second sealing unit.
  • the reference numeral 1 shows an arrangement according to the invention consisting of a shaft feedthrough 3 arranged on a transformer housing 2 (shown only in section).
  • the shaft bushing 3 is arranged on a housing opening 2.1 of the transformer housing 2 and preferably connected in a sealing manner with this, for example screwed.
  • the shaft feedthrough 3 consists essentially of a transformer housing 2 penetrating shaft 4 and a shaft 4 at least partially circumferentially surrounding shaft receiving 5 with a flange 5.1, by means of which the shaft receiving rests against the transformer housing 2.
  • the shaft receptacle 5 has an opening 5.2, within which the shaft 4 penetrates the shaft receptacle 5.
  • the shaft 4 projects, for example, on both sides via the shaft bushing 5, wherein a motor or manual drive can be provided on the part projecting into the housing interior I, for example, a component to be moved inside the transformer and on the shaft part projecting into the outside space A.
  • At least one bearing unit 6 for rotatably mounted mounting of the shaft 4 is provided within the opening 5.2 of the shaft receptacle 5, at least one bearing unit 6 for rotatably mounted mounting of the shaft 4 is provided.
  • the storage 6 can by means well known from the prior art means, such as plain bearings, bearings, bushings, or the like. respectively.
  • a first sealing unit 7 is received in the interior of the opening 5.2, by means of which the shaft 4 is sealed against the shaft seat 5 or can be sealed, as will be explained in more detail below.
  • at least one second sealing unit 8 is provided, which is arranged exchangeably in the shaft receptacle 5.
  • This second sealing unit 8 usually assumes the sealing of the shaft 4 with respect to the shaft seat 5, so that an oil absorbed in the transformer housing 2, which is in particular an insulating oil, can not escape through the shaft passage 3 or the opening 5.2 of the shaft seat 5. Should the second sealing unit 8 become leaky, for example because of aging or another defect, this second sealing unit 8 can be replaced without the oil filled in the transformer housing 2 having to be drained or pumped out. This is possible because after removal of the second sealing unit 8 via the first sealing unit 7 for a complete or at least almost complete sealing of the shaft 4 relative to the shaft receiving 5 care is taken, so that a significant oil leakage is avoided.
  • the at least one bearing unit 6, the first sealing unit 7 and, subsequently, the at least one second sealing unit 8 are arranged peripherally around the shaft 4 along the longitudinal axis LA of the shaft 4 from the housing interior I to the exterior space A.
  • the second sealing unit 8 is accessible, for example, from the exterior space A.
  • this is for example formed by a pair of shaft seals 8.1, 8.2.
  • These shaft seals 8.1, 8.2 are at least partially received in a bushing 9, which may be formed in particular as a screw bushing and this is provided with an external thread 9.1.
  • the external thread 9.1 interacts with an internal thread 5.3 of a recess 5.
  • a seal plate may be provided which has an opening for the passage of the shaft 4 and circumferentially around this opening a receptacle for a seal, in particular a shaft seal, said seal or this shaft seal the second seal unit 8 forms.
  • at least one seal 9.2 is provided between the bush 9 and the shaft receptacle 5.
  • other sealing options known from the prior art can also be used, for example a metallic seal by a conical thread or a fine thread.
  • FIG. 2 shows a section of the region of the transformer bushing marked in FIG.
  • the first sealing unit 7 upstream of the second sealing unit 8 along the longitudinal axis LA of the shaft 4 in the direction of the housing interior I is designed to be expandable or deformable in the exemplary embodiment shown in FIG.
  • the first sealing unit 7 has a hollow interior 7.1, which can be filled, for example, with air, oil, gas or other pressurizable media. As a result, the first sealing unit 7 is expanded or deformed such that sealing of the shaft 4 takes place with respect to the shaft receptacle 5.
  • At least one first channel 10 is provided whose first free end 10.1 is in liquid-tight and / or gas-tight connection with the interior 7.1 of the first sealing unit 7 and which by means of its second free End 10.2 in the direction of the outside space A is opened.
  • a closure element 12 is provided for liquid-tight or gas-tight closing of the second free end 10.2 of the first channel 10.
  • At least one second channel 11 is provided in the shaft receptacle 5, which is designed for venting a space R located between the shaft 4 and the shaft receptacle 5 or the first seal unit 7 and the second seal unit 8.
  • the second channel 11 has a first free end 11.1, by means of which the channel 11 opens liquid-tight or gas-tight in the space R and a second free end 11.2 through which the second channel 11 is open to the outside space A.
  • This second free end 11.2 can also be closed with a closure element 13.
  • the change of the second seal unit 8 using the expandable first seal unit 7 will be described.
  • a medium under pressure is introduced into the interior 7.1 of the first sealing unit 7. This leads to an expansion or deformation of the first sealing unit 7 such that the shaft 4 is sealed relative to the shaft seat 5.
  • the second sealing unit 8 can be changed or maintained, for example by unscrewing the bushing 9 from the recess 5.4 of the shaft seat 5.
  • the space R fills with air, said air after mounting the second seal unit 8 and the relaxation or the recovery of the first seal unit 7 by discharging the pressurized medium from the interior 7.1 of the first seal unit 7 can get into the housing interior I of the transformer.
  • the ingress of air into the transformer is undesirable because it may cause flashover.
  • the mounting of the second sealing unit 8 is followed by a venting process.
  • the closure element 3 is first removed from the second free end 11.2 of the second channel 11, and then the first sealing element 7 is relieved or re-deformed by releasing the pressurized medium from its interior 7.1.
  • This can be from the housing interior I ago Oil of the transformer in the space R between the first and second sealing unit 7, 8 penetrate and flow out through the channel 11 in the direction of the outer space A. In this case, the air present in the space R is pushed out of this space R or the second channel 11.
  • the first and second channels 10, 11 are closed with the respective closure elements 12, 13. This ends the replacement or maintenance of the second sealing element 8.
  • the first sealing unit 7 can also be expanded or deformed by other means, for example mechanically.
  • the unscrewing of the bushing 9 from the shaft seat 5 causes a mechanical expansion or deformation of the first sealing unit 7.
  • pressure elements by unscrewing the sleeve 9 from a pushed back or pushed back position in a direction of the shaft 4 advanced position, for example, by spring force, are moved, these pressure elements a radial Exert pressure on the first sealing unit 7 and thereby effect a sealing of the shaft 4 with respect to the shaft seat 5.
  • the pressure elements can be pressed into their radially retracted position by re-screwing the bushing 9, so that due to the screwing of the bushing 9, the first sealing unit 7 is relaxed.
  • FIG. 3 shows a sectional view similar to FIG. 2, wherein the first sealing unit 7 is not designed as an expandable or deformable sealing unit but is formed, for example, by a pair of conventional shaft sealing rings 7.2, 7.3.
  • This second embodiment is characterized by a much simpler construction and thus a more cost-effective production compared to the first Embodiment from.
  • the first sealing unit 7 is subject to a similar wear as the interchangeable arranged on the shaft receiving 5 second seal unit 8, so when unscrewing the bush 9 from the shaft 5 and the replacement or maintenance of the shaft seals 8.1, 8.2 of the second seal unit 8 with a slight leakage of oil on the first seal unit 7 is to be expected.
  • a seal of the shaft 4 with respect to the shaft seat 5 is ensured to the extent that only a slight leakage of existing in the housing interior I of the transformer oil is to be expected.
  • a change or maintenance of the second sealing unit 8 without discharging the oil contained in the transformer can also take place here.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Connector Housings Or Holding Contact Members (AREA)

Abstract

L'invention concerne un système comprenant une enveloppe de transformateur (2) qui comporte une ouverture d'enveloppe (2.1), un passage d'arbre (3) disposé dans ou sur l'ouverture d'enveloppe (2.1) et comportant un arbre (4), ainsi qu'un logement d'arbre (5) entourant au moins partiellement l'arbre (4) de manière circonférentielle, ce logement d'arbre (5) comprenant au moins un ensemble palier (6) et une première unité d'étanchéité (7) pour supporter et étanchéifier l'arbre par rapport au logement d'arbre (5). En outre, au moins une deuxième unité d'étanchéité (8) est prévue et est disposée de manière amovible dans le logement d'arbre (5).
EP11707087A 2010-05-11 2011-02-23 Traversée de transformateur Withdrawn EP2569558A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010020139 DE102010020139A1 (de) 2010-05-11 2010-05-11 Transformatordurchführung
PCT/EP2011/000853 WO2011141077A2 (fr) 2010-05-11 2011-02-23 Traversée de transformateur

Publications (1)

Publication Number Publication Date
EP2569558A2 true EP2569558A2 (fr) 2013-03-20

Family

ID=43970858

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11707087A Withdrawn EP2569558A2 (fr) 2010-05-11 2011-02-23 Traversée de transformateur

Country Status (4)

Country Link
EP (1) EP2569558A2 (fr)
CN (1) CN103038550A (fr)
DE (1) DE102010020139A1 (fr)
WO (1) WO2011141077A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012217789A1 (de) * 2012-09-28 2014-04-03 Siemens Aktiengesellschaft Einrichtung zur gasdichten Durchführung eines Leiters durch eine Gehäusewand
DE102019108002B4 (de) * 2019-03-28 2022-09-01 Herrenknecht Aktiengesellschaft Schneidrollenlagerteil, Schneidrollenhalterung mit Schneidrollenlagerteil, Schneidrad mit Schneidrollenhalterung und Tunnelvortriebsmaschine mit Schneidrad

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE251338C (fr) *
CH174411A (de) * 1934-03-12 1935-01-15 Leimbacher Fritz Dichtungseinrichtung.
GB650641A (en) * 1947-12-18 1951-02-28 Us Rubber Co Improvements in fluid pressure seal for a rotatable shaft
US2943874A (en) * 1955-09-19 1960-07-05 Walter J Valdi Stern tube safety ring assembly
US2863681A (en) * 1955-10-04 1958-12-09 Robbins Machine & Mfg Co Inc Inflatable seal for rotating shafts
DE1224105B (de) * 1962-11-02 1966-09-01 Continental Gummi Werke Ag Dichtung
DE1949001U (de) * 1963-12-05 1966-11-03 Grasso S Konink Machf En N V Auswechselbare wellendichtung.
US3652812A (en) * 1970-09-28 1972-03-28 Westinghouse Electric Corp Tap changer switch with radial pressurized movable contact structure
DE2620636C3 (de) * 1976-05-10 1986-01-09 Alkem Gmbh, 6450 Hanau Einrichtung zur Einführung einer kraftübertragenden Welle in einen Handschuhbehälter mit kontaminierter Atmosphäre
DE3815655C2 (de) * 1988-05-07 1994-04-14 Blohm Voss Ag Abdichtung für rotierende Wellen, insbesondere Stevenrohrabdichtung
JP3017659B2 (ja) * 1995-05-22 2000-03-13 西武商事有限会社 仕切弁
JP2001248734A (ja) * 2000-03-07 2001-09-14 Kurimoto Ltd 弁軸等の軸のシール装置
JP2002228010A (ja) * 2000-10-25 2002-08-14 Teijin Seiki Co Ltd 真空シール機構および真空シール装置
DE102005009193B3 (de) * 2005-03-01 2006-08-17 Maschinenfabrik Reinhausen Gmbh Umsteller
DE502005005033D1 (de) * 2005-06-09 2008-09-25 Freudenberg Carl Kg Dichtung und Anordnung mit in Reihe geschalteten Dichtlippen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011141077A2 *

Also Published As

Publication number Publication date
WO2011141077A3 (fr) 2013-01-31
WO2011141077A2 (fr) 2011-11-17
CN103038550A (zh) 2013-04-10
DE102010020139A1 (de) 2011-11-17

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