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EP0131594A1 - Corps a ailettes avec ailettes creuses, procede et machine pour leur fabrication. - Google Patents

Corps a ailettes avec ailettes creuses, procede et machine pour leur fabrication.

Info

Publication number
EP0131594A1
EP0131594A1 EP84900383A EP84900383A EP0131594A1 EP 0131594 A1 EP0131594 A1 EP 0131594A1 EP 84900383 A EP84900383 A EP 84900383A EP 84900383 A EP84900383 A EP 84900383A EP 0131594 A1 EP0131594 A1 EP 0131594A1
Authority
EP
European Patent Office
Prior art keywords
beads
rib
hollow
fins
rib body
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.)
Granted
Application number
EP84900383A
Other languages
German (de)
English (en)
Other versions
EP0131594B1 (fr
Inventor
Hermann Wild
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.)
Zschokke Wartmann AG
Original Assignee
Zschokke Wartmann AG
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 Zschokke Wartmann AG filed Critical Zschokke Wartmann AG
Priority to AT84900383T priority Critical patent/ATE21465T1/de
Publication of EP0131594A1 publication Critical patent/EP0131594A1/fr
Application granted granted Critical
Publication of EP0131594B1 publication Critical patent/EP0131594B1/fr
Expired 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
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid cooling
    • H01F27/12—Oil cooling
    • 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
    • H01F27/025—Constructional details relating to cooling

Definitions

  • Rib body with hollow ribs and method and machine for its production
  • the invention relates to a rib body made of a one-piece sheet metal, in particular for transformer tanks, in which spaced, parallel hollow ribs are formed, the legs of which are closed on the end faces between the rib back and the webs connecting the legs of adjacent ribs Method and a machine for producing this rib body.
  • Rib bodies with hollow ribs are required to a considerable extent, in particular for the manufacture of transformer tanks.
  • the tank In order to cool the active components arranged in the interior of such a transformer tank, the tank is filled with a cooling liquid, usually a mineral oil.
  • the arrangement of cooling fins in the fin bodies serves to dissipate the heat generated by the transformer to a sufficient extent to the ambient air.
  • hollow ribs of great height are formed in the rib bodies.
  • the ribbed bodies In order to be able to withstand the mechanical stresses that occur during operation, the ribbed bodies must have sufficient strength and stability.
  • the walls of the hollow ribs are stiffened by inserting metal rods between the walls of each hollow rib and welding them to the walls.
  • This solution is relatively complex since, in addition to the press for folding the ribs, an insertion device for the metal rods and a welding device are required.
  • the walls of the hollow ribs are reinforced by beads which are embossed into the rib body made of a metal strip before the ribs are folded. Apart from the fact that an additional device with an appropriate space is required for the embossing of the beads, it is necessary 'to control this device so that the beads are stamped on the richti ⁇ gene site, for which a correspondingly high cost is required.
  • the walls of hollow ribs are also stiffened by beads. These beads are also intended to achieve better guidance of the cooling liquid and, consequently, better cooling. But even in this embodiment, the effort to manufacture the beads
  • the stiffeners in so far as they are elongated beads or stiffening parts, are arranged parallel to the rib back and thus parallel to the flow in order to thereby offer the smallest possible obstacle to the flow.
  • stiffeners are provided on at least part of the rib body, which are perpendicular to the rib back.
  • FIG. 1 shows a rib body with hollow ribs in a schematic, spatial representation
  • Fig. 2 shows a section of a partially shown
  • Fig. 3 shows a section of a partially shown
  • the rib body 1 shown in FIG. 1 is made, for example, from a strip sheet and has any number of hollow ribs of relatively great height.
  • the hollow ribs 2 have two legs 3 which on the one hand form a rib back 4 at one end and on the other hand are connected at the other end by webs 5 to the legs 3 of the adjacent hollow rib 2.
  • the legs 3 of the hollow ribs 2 are together, e.g. by welding, connected and form a tight seal.
  • beads are formed in the form of trough-shaped depressions 7 which extend at least over part of the height of the ribs.
  • the beads 7 extend directly from the web area to the rib back area, i.e. over the entire height of the leg 3.
  • the beads 7 extend perpendicular to the rib back 4. Since in transformer boilers, which represent a preferred area of application of the fin bodies 1, the flow takes place parallel to the fin back 4, this means that the beads 7 run transversely to the direction of flow. It has now surprisingly
  • Adequate dimensional stability of the hollow ribs 2 is also achieved with the beads 7. It is expedient here that the beads 7 are not too narrow.
  • a suitable solution is, for example, the trapezoidal configuration of the beads 7. However, another, e.g. rectangular or semicircular cross-section can be selected for the beads 7.
  • FIG. 3 It is also possible, see FIG. 3, to use rib-shaped elevations 8 as beads.
  • the beads 8 lie here at the same locations as in FIG. 1 the depressions 7.
  • the beads 7 and 8 can extend not only over the legs 3, but also over the rib back 4 and over the webs 5, as shown in the first rib on the left edge of the picture is.
  • the beads 7 and 8 can be molded in a relatively simple manner in the manufacture of the folds from the strip sheet. If the beads 7 or 8 are to extend over the entire surface of the rib body 1, the beads can be produced by rolling before the folds are formed. If, on the other hand, the beads 7 or 8 are only to be formed on the legs 3, the pressing tools can be designed for this purpose, for example by attaching ribs to the pressing dies and recesses in the folding sword. The production in the latter case is particularly cheap, since no additional space and no additional surgery are required.
  • the molding of beads is a particularly simple and cost-saving solution.
  • additional parts which run transversely to the flow, e.g. To attach webs, perforated sheets or the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

Un tel corps à ailettes (1) formé d'ailettes creuses (2) et de ponts situés entre celles-ci possède au moins sur les côtés (3) des ailettes creuses (2) des moulures s'étendant perpendiculairement au dos des ailettes (4) et en forme de cavités en conduits (7) ou d'élévations en nervures (8). Les moulures (7) s'étendent perpendiculairement au dos des ailettes (4) des ailettes creuses (2). Le corps à ailettes (1) trouve sa principale utilisation dans les cuves de transformateur et sert à refroidir les éléments actifs situés dans un liquide de refroidissement à l'intérieur de la cuve. Dans les ailettes creuses (2) disposées perpendiculairement se crée un écoulement de liquide de refroidissement parallèle au dos des ailettes (4). Malgré les moulures qui s'étendent transversalement par rapport à l'écoulement, l'action refroidissante des ailettes creuses connues équivaut à celle des moulures parallèles à l'écoulement. L'avantage des moulures s'étendant transversalement par rapport à l'écoulement est le suivant: au contraire des moulures parallèles à l'écoulement, celles-ci peuvent être fabriquées sans installations ou mécanismes de commande supplémentaires avant ou pendant le pliage des ailettes creuses.
EP84900383A 1983-01-19 1984-01-17 Corps a ailettes avec ailettes creuses, procede et machine pour leur fabrication Expired EP0131594B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84900383T ATE21465T1 (de) 1983-01-19 1984-01-17 Rippenkoerper mit hohlrippen und verfahren sowie maschine zu dessen herstellung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH30683A CH664050A5 (de) 1983-01-19 1983-01-19 Rippenkoerper mit hohlrippen und verfahren zu dessen herstellung sowie maschine zur ausfuehrung des verfahrens.
CH306/83 1983-01-19

Publications (2)

Publication Number Publication Date
EP0131594A1 true EP0131594A1 (fr) 1985-01-23
EP0131594B1 EP0131594B1 (fr) 1986-08-13

Family

ID=4183996

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84900383A Expired EP0131594B1 (fr) 1983-01-19 1984-01-17 Corps a ailettes avec ailettes creuses, procede et machine pour leur fabrication

Country Status (5)

Country Link
EP (1) EP0131594B1 (fr)
JP (1) JPS60500354A (fr)
CH (1) CH664050A5 (fr)
DE (1) DE3460436D1 (fr)
WO (1) WO1984003002A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6050329A (en) * 1999-06-21 2000-04-18 Mcgraw Edison Company Cooling fin with reinforcing ripples
DE10010737C2 (de) * 2000-03-04 2002-01-10 Alstom Paris Radiator für einen elektrischen Transformator
JP2015065375A (ja) * 2013-09-26 2015-04-09 株式会社ダイヘン 静止誘導機器、及び山形部材

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR674619A (fr) * 1928-07-03 1930-01-30 Ferranti Ltd Perfectionnements aux radiateurs ou réfrigérateurs
DE2247514C3 (de) * 1972-09-28 1981-01-08 Wuertt. Stahlradiatorenfabrik Gmbh, 7070 Schwaebisch Gmuend Radiatoranordnung mit mehreren Gliedern zum Kühlen von Öltransformatoren
US3902552A (en) * 1973-05-10 1975-09-02 Olin Corp Patterned tubing
CH565358A5 (en) * 1975-03-03 1975-08-15 Paveg Anstalt Aluminium alloy radr for central heating - has steel cladding on inside of waterways for corrosion resistance

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8403002A1 *

Also Published As

Publication number Publication date
WO1984003002A1 (fr) 1984-08-02
DE3460436D1 (en) 1986-09-18
JPS60500354A (ja) 1985-03-14
EP0131594B1 (fr) 1986-08-13
CH664050A5 (de) 1988-01-29

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