AT85521B - Grooved sleeve for electrical machines. - Google Patents

Grooved sleeve for electrical machines.

Info

Publication number
AT85521B
AT85521B AT85521DA AT85521B AT 85521 B AT85521 B AT 85521B AT 85521D A AT85521D A AT 85521DA AT 85521 B AT85521 B AT 85521B
Authority
AT
Austria
Prior art keywords
grooved sleeve
electrical machines
pipe
metal
grooved
Prior art date
Application number
Other languages
German (de)
Original Assignee
Aeg Union Elek Wien
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 Aeg Union Elek Wien filed Critical Aeg Union Elek Wien
Application granted granted Critical
Publication of AT85521B publication Critical patent/AT85521B/en

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  • Insulating Bodies (AREA)

Description

  

   <Desc/Clms Page number 1> 
 



  Nutenhülse für elektrische Maschinen. 



   Die Nutenhülsen für elektrische Hochspannungsmaschinen wurden bisher meist aus Mikanit hergestellt. Wegen des Fehlens von Rohglimmer ist die Herstellung von Mikanitrohren erschwert. Die bekannten Rohre aus Pressspan, Papier o. dgl., die mit einem geeigneten Klebemittel, beispielsweise Schellak oder synthetischem Harz, im Wickelverfahren hergestellt sind, werden infolge der bei hohen Spannungen auftretenden Glimmentladungen nach kurzer Zeit zerstört. Dies rührt daher, dass beim Auftreten von Glimmentladungen die vegetabilischen Teile des Rohres verkohlen, Glimmentladungen treten bei hohen Spannungen bekanntlich dann auf, wenn das elektrische Feld zwischen dem Leiter und dem umgebenden Eisen ausser dem Isoliermaterial eine Luftstrecke durchsetzen muss. 



   Gemäss der Erfindung erhalten die in bekannter Weise gewickelten Rohre sowohl innen wie aussen einen dicht aufgeklebten Metallbelag. Bei der Herstellung muss vor allen Dingen darauf geachtet werden, dass zwischen dem Material des Rohres und dem Metallbelag nicht die geringsten Mengen von Luft vorhanden sind. Da die äussere metallische Belegung das Potential des Eisens, die innere aber das Potential des metallischen Leiters annimmt, verlaufen alle Feldlinien ausschliesslich durch das Isolationsmaterial, so dass Glimmentladungen nicht mehr möglich sind. 



   Die Fig. zeigt ein Beispiel der Anordnung. Es bezeichnet 1 das gewickelte Rohr, 2 den inneren, 3 den äusseren Metallbelag. 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



   <Desc / Clms Page number 1>
 



  Grooved sleeve for electrical machines.



   The grooved sleeves for electrical high-voltage machines have so far mostly been made of micanite. Due to the lack of raw mica, the manufacture of micanite tubes is difficult. The known tubes made of chipboard, paper or the like, which are manufactured with a suitable adhesive, for example shellac or synthetic resin, in the winding process, are destroyed after a short time as a result of the glow discharges occurring at high voltages. This is due to the fact that when glow discharges occur, the vegetable parts of the pipe char; glow discharges occur at high voltages, as is well known, when the electrical field between the conductor and the surrounding iron must penetrate an air gap in addition to the insulating material.



   According to the invention, the tubes wound in a known manner receive a tightly glued metal coating both inside and outside. During production, it must be ensured above all that there is not the slightest amount of air between the material of the pipe and the metal coating. Since the outer metallic coating assumes the potential of iron, the inner one the potential of the metallic conductor, all field lines run exclusively through the insulation material, so that glow discharges are no longer possible.



   The figure shows an example of the arrangement. It denotes 1 the wound tube, 2 the inner, 3 the outer metal coating.

** WARNING ** End of DESC field may overlap beginning of CLMS **.

 

Claims (1)

PATENT-ANSPRUCH : Nutenhülse für elektrische Maschinen, bei der das gewickelte Isolierrohr aussen mit einem dicht anliegenden Metallbelag versehen ist, dadurch gekennzeichnet, dass auch die Innenseite des Rohres mit Metall so belegt ist, dass zwischen dem Material des Rohres und dem Metallbelag keine Luftstrecke vorhanden ist, zu dem Zwecke, die vegetabilischen Teile der Nutenhülse und der Leiterisolation gegen die schädlichen Wirkungen der Glimmentladung zu schützen. EMI1.1 **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: Grooved sleeve for electrical machines, in which the wound insulating tube is provided on the outside with a tightly fitting metal coating, characterized in that the Inside of the pipe is covered with metal so that there is no gap between the material of the pipe and the metal covering, for the purpose of protecting the vegetable parts of the grooved sleeve and the conductor insulation against the harmful effects of the glow discharge. EMI1.1 ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT85521D 1917-05-07 1919-11-07 Grooved sleeve for electrical machines. AT85521B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE85521X 1917-05-07

Publications (1)

Publication Number Publication Date
AT85521B true AT85521B (en) 1921-09-10

Family

ID=5640877

Family Applications (1)

Application Number Title Priority Date Filing Date
AT85521D AT85521B (en) 1917-05-07 1919-11-07 Grooved sleeve for electrical machines.

Country Status (1)

Country Link
AT (1) AT85521B (en)

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