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EP3493229A1 - Dispositif de presse pour bobines de transformateurs - Google Patents

Dispositif de presse pour bobines de transformateurs Download PDF

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Publication number
EP3493229A1
EP3493229A1 EP18208284.2A EP18208284A EP3493229A1 EP 3493229 A1 EP3493229 A1 EP 3493229A1 EP 18208284 A EP18208284 A EP 18208284A EP 3493229 A1 EP3493229 A1 EP 3493229A1
Authority
EP
European Patent Office
Prior art keywords
pressing
press
ring
plate
winding
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Withdrawn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
EP18208284.2A
Other languages
German (de)
English (en)
Inventor
Justin Case
Manfred Hirzberger
Gerhard Karner
Helmut Pregartner
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 Energy Global GmbH and Co KG
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP3493229A1 publication Critical patent/EP3493229A1/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Withdrawn legal-status Critical Current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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/306—Fastening or mounting coils or windings on core, casing or other support

Definitions

  • the press arrangement is particularly applicable to power transformers or inductors.
  • a transformer in particular a power transformer, or a choke coil, both for high electrical powers of e.g. 50 kVA to 1000 MVA usually have a stacked from core laminations transformer or choke core. At its number of core legs, which corresponds to the number of phases as a rule, a number of windings of the individual phases are arranged. To form a closed magnetic circuit, the core legs are connected to one another at the ends via yokes. The yokes are pressed in each case by means of opposite frame parts of a pressing frame and connected to one another via a number of pulling elements running along the core limbs.
  • winding pressing forces are usually applied first by hydraulic or electric pressure cylinders as pressing means, which are used between clamping parts of the yoke, such as an upper pressure plate of the yoke, and a pressing ring of the winding.
  • the pressing forces are then absorbed by spacers, such as in the form of insulation, or springs, which are used in place of the impression cylinder.
  • pressing the windings provide, for example, that the pressing forces are provided by pressing devices, which lie between the press ring, which rests on the entire winding head directly on the axial end of a winding for distributing the pressing force, and a press plate, which is spaced by means of support blocks from the compression ring, are arranged. These methods often do not distribute the pressing forces evenly across the windings. This reduces the mechanical stability of the winding arrangement and can lead to some winding parts being stressed too much during pressing when the desired pressing force is applied. Furthermore, the desired pressing force reduces after inserting the support blocks and the removal of the pressing means to an indefinite degree.
  • the pressing devices are arranged in the pressing direction outside of the pressing plate and are supported on a normal to the pressing direction aligned pressing frame, which is arranged in the pressing direction outside the pressing plate at a distance from the pressing plate and connected to the traction means.
  • the pressing devices such as hydraulic or electric presses are thus arranged between the known pressure plate and a - located in the assembled state of the entire pressing assembly - located outside the pressing plate pressing frame.
  • the pressing devices are therefore supported on the one hand on the pressing frame and on the other hand on the pressing plate.
  • the pressing forces are first introduced into the press plate, which distributes these over several pressing rings, and only then -. via support blocks - introduced into the press rings themselves. This leads to a better distribution of the pressing forces exerted by the press devices on the press rings.
  • the prestressed traction means are rigidly connected to the pressing plates during the application of the pressing forces.
  • the rigid connection may e.g. be made by adjusting screws or Auslegekeile. In this way, there is no reduction in press force when removing the pressing means.
  • the press arrangement according to the invention usually comprises two press plates, which are arranged on both sides of a transformer core.
  • the so-called pressure plate or pressing plates are generally flat or cuboid, for example as a solid body, or as an open hollow profile, such as a C-profile.
  • the press assembly according to the invention is in the assembled state at the top of the winding assembly, according to the press plate is also called the upper press plate and the press rings are referred to as upper press rings.
  • the traction means are passed through the windings and anchored on the other side of the windings, usually in a lower pressure plate, which is designed analogously to the upper pressure plate, in particular covers a plurality of windings.
  • a lower pressure plate which is designed analogously to the upper pressure plate, in particular covers a plurality of windings.
  • at the bottom of each winding is another, namely lower press ring, which covers the winding analogously to the upper press ring and distributes the pressing forces uniformly over the lower winding head.
  • the traction means are connected to the pressing plate and the pressing means are located between the (upper) pressing plate and the (upper) pressing rings.
  • the pressing force is introduced directly from the pressing devices in the press rings.
  • the attachment of the traction means on the opposite side of the windings also takes place via lower compression rings and one or more lower pressure plates.
  • the pressing rings can be made of pressboard, synthetic resin or hard glass fabric.
  • a pressing ring need not necessarily be formed as a continuous ring, but can also be composed of several ring segments.
  • the press plates, press frames and traction means are usually made of steel.
  • the pressing frame comprises at least two rigid beams, on each of which a plurality of pressing devices are supported, wherein a plurality of beams are interconnected by at least one carrier.
  • the two rigid beams provide the Pressing a good support.
  • the carrier or carriers give the pressing frame additional stability.
  • the carrier of the pressing frame extends at an angle, in particular normal, to the pressing plate.
  • the supports would indeed run in a plane parallel to the press plates, but normal to the longitudinal extent of the press plates.
  • the bars have on the side which is aligned with the press plate, extension means, wherein an extension means with at least one traction means is detachably connected.
  • the traction means must indeed be connected to the pressing frame, more precisely with the beam. If the traction means only extend to the press plate, but in any case not to the beam, an extension of the traction means must take place.
  • the extension means may be designed per traction means as a pair of steel plates which protrude in the direction of the press plate from the beam.
  • the extension means may be connected by means of a bolt connection with the traction means. In the case of steel plates, these could receive a bolt which is guided by one end of a traction means.
  • An advantage with regard to the distribution of the pressing force is when at least two traction means and four pressing devices per winding are provided.
  • Support blocks such as pressboard, may be provided between the press ring and the press plate.
  • the support blocks can distribute the pressing forces over a larger area over the pressing rings, since the space requirements of the pressing devices, as would be arranged according to the prior art between the pressing plate and press ring, can be used for additional support blocks. Due to the larger distribution of the pressing force local overstressing in the press ring can be avoided.
  • the invention also relates to a winding arrangement for a transformer, comprising a plurality of windings and a pressing arrangement according to the invention, wherein on the axial end of a winding in each case a compression ring is placed and the traction means are connected outside the opposite axial end of the windings with a further pressure plate having a plurality of windings covered.
  • a further press ring is attached between the opposite axial end of a winding and the further press plate.
  • the invention also relates to a transformer having a winding arrangement according to the invention.
  • Fig. 1 shows a press arrangement according to the invention for windings 1 of transformers.
  • the pressing direction runs in the axial direction of the illustrated winding 1, ie in FIG Fig. 1 from top to bottom.
  • an upper press ring 2 Directly at the axial upper end of the winding 1 is an upper press ring 2, directly at the axial lower end of the winding 1 is a lower press ring 3.
  • the press rings 2,3 are congruent seen in the axial direction and project radially beyond the winding 1, whereby they cover the entire winding 1.
  • the press force is in Fig. 1 applied in the vertical direction, the pressing rings 2,3 are aligned horizontally.
  • the traction means are designed here as tension rods 4 and extend vertically. Upwards, the tension rods 4 are guided by the pressure ring 2, pass the upper pressure plate 5, terminate just above the upper edge of the pressure plate 5 and are each connected via a bolt connection 6 to a pair of vertically oriented steel plates 7, which serve as extension means.
  • the steel plates 7 are at the bottom of the Fixed pressing frame, on the underside of the beam 8 of the pressing frame. The steel plates 7 serve as an extension of the tension rods 4 to the bar. 8
  • the press frame has above the beams 8 support 11, which each connect two opposing beams 8 a winding 1 together.
  • the carriers 11 extend at a right angle to the press plates 5.
  • the arrangement of the pressing devices 10 may be made Fig. 2 be seen.
  • Per tension rod 4 are provided on both sides of the tension rod 4, two pressing devices 10 and a running over both pressing devices 10 beam 8.
  • the pressing devices 10 are viewed in the pressing direction and arranged with respect to the winding 1 outside the upper pressure plate 5 and based on the one hand on the normally aligned to the pressing direction pressing frame, more precisely its beam 8, from, on the other hand on the upper pressure plate 5.
  • the respective pressing frame consists here two beams 8 and a beam connecting the beams 8 11.
  • the pressing frame is arranged at a distance corresponding to the height of the pressing devices 10 to the upper press plate 5 and connected to the tension rods 4.
  • an upper press plate 5 is provided, see Fig. 1 , It is designed here as an open C-profile, the opening of which is directed away from the transformer core 9.
  • the two upper press plates 5 extend, as well as the lower pressure plates 12, normal to the plane of the Fig. 1 and cover each several, here two, windings 1, see Fig. 2 ,
  • the tension rods 4 are fixedly connected at the bottom thereof with a lower pressure plate 12, which are arranged below the lower pressure ring 3.
  • the formation, here as C-profiles, and the course of the lower pressure plates 12 corresponds to that of the upper pressure plates 5.
  • the lower pressure plates 12 are arranged on both sides of the transformer core 9. They run parallel to each other, as well as the upper press plates 5 are parallel to each other. Lower and upper pressure plates 5,12 also run parallel to each other.
  • support blocks 13 are provided between upper press ring 2 and the upper press plates 5 support blocks 13 are provided. Likewise, 12 support blocks 13 are provided between the lower press ring 3 and the lower press plates.
  • the height or thickness of the support blocks, measured in the axial direction of the winding 1 (ie in the vertical direction in the Fig. 1 . 2 ) is usually larger than that of the pressing rings 2, 3 but less than that of the pressing plates 5, 12.
  • the press plates 5, 12 in turn have a thickness or height of a multiple of the press rings 2, 3, approximately 5 to 10 times.
  • two traction means namely two tension rods 4, are provided per winding 1, and two pressing devices 10 per tension rod 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
EP18208284.2A 2017-11-30 2018-11-26 Dispositif de presse pour bobines de transformateurs Withdrawn EP3493229A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017221598 2017-11-30

Publications (1)

Publication Number Publication Date
EP3493229A1 true EP3493229A1 (fr) 2019-06-05

Family

ID=64477002

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18208284.2A Withdrawn EP3493229A1 (fr) 2017-11-30 2018-11-26 Dispositif de presse pour bobines de transformateurs

Country Status (1)

Country Link
EP (1) EP3493229A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022253517A1 (fr) * 2021-06-02 2022-12-08 Siemens Energy Global GmbH & Co. KG Dispositif de pression et partie active d'un transformateur
CN115863023A (zh) * 2022-12-09 2023-03-28 江苏伟正电气科技有限公司 一种具有线圈压紧功能的干式变压器
CN118971448A (zh) * 2024-10-14 2024-11-15 广州爱知电机有限公司 一种提高槽满率的电动机

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1372625A (fr) * 1963-08-07 1964-09-18 Cie Generale D Electricte Procédé et dispositif de serrage d'enroulements de machines électriques statiques
DE1208810B (de) * 1960-11-29 1966-01-13 Licentia Gmbh Vorrichtung zur gemeinsamen Pressung der Kerne und Wicklungen von grossen Transformatoren
DD50681A1 (de) * 1965-05-22 1966-10-05 Werner Nitzschke Pressvorrichtung für transformatorenwicklungen, drosselspulen u. dgl.
DE2340787A1 (de) * 1973-08-11 1975-03-06 Transformatoren Union Ag Segmentpressung von transformatorenwicklungen mit stuetzzylindern
JPS57113425U (fr) * 1980-12-29 1982-07-13
DE3151171A1 (de) * 1981-12-23 1983-06-30 Transformatoren Union Ag, 7000 Stuttgart Gestell zum halten und pressen von wicklungen in transformatoren
WO2000002211A1 (fr) * 1998-07-02 2000-01-13 Siemens Aktiengesellschaft Composant a induction presentant un noyau

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1208810B (de) * 1960-11-29 1966-01-13 Licentia Gmbh Vorrichtung zur gemeinsamen Pressung der Kerne und Wicklungen von grossen Transformatoren
FR1372625A (fr) * 1963-08-07 1964-09-18 Cie Generale D Electricte Procédé et dispositif de serrage d'enroulements de machines électriques statiques
DD50681A1 (de) * 1965-05-22 1966-10-05 Werner Nitzschke Pressvorrichtung für transformatorenwicklungen, drosselspulen u. dgl.
DE2340787A1 (de) * 1973-08-11 1975-03-06 Transformatoren Union Ag Segmentpressung von transformatorenwicklungen mit stuetzzylindern
JPS57113425U (fr) * 1980-12-29 1982-07-13
DE3151171A1 (de) * 1981-12-23 1983-06-30 Transformatoren Union Ag, 7000 Stuttgart Gestell zum halten und pressen von wicklungen in transformatoren
WO2000002211A1 (fr) * 1998-07-02 2000-01-13 Siemens Aktiengesellschaft Composant a induction presentant un noyau

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022253517A1 (fr) * 2021-06-02 2022-12-08 Siemens Energy Global GmbH & Co. KG Dispositif de pression et partie active d'un transformateur
CN115863023A (zh) * 2022-12-09 2023-03-28 江苏伟正电气科技有限公司 一种具有线圈压紧功能的干式变压器
CN115863023B (zh) * 2022-12-09 2023-12-26 江苏伟正电气科技有限公司 一种具有线圈压紧功能的干式变压器
CN118971448A (zh) * 2024-10-14 2024-11-15 广州爱知电机有限公司 一种提高槽满率的电动机

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