AT118414B - Process for producing a coating over the windings of motors, in particular for refrigeration machines, for protection against acids. - Google Patents

Process for producing a coating over the windings of motors, in particular for refrigeration machines, for protection against acids.

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Publication number
AT118414B
AT118414B AT118414DA AT118414B AT 118414 B AT118414 B AT 118414B AT 118414D A AT118414D A AT 118414DA AT 118414 B AT118414 B AT 118414B
Authority
AT
Austria
Prior art keywords
windings
producing
motors
protection against
coating over
Prior art date
Application number
Other languages
German (de)
Inventor
Gabriel Zwicky
Original Assignee
Gabriel Zwicky
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 Gabriel Zwicky filed Critical Gabriel Zwicky
Application granted granted Critical
Publication of AT118414B publication Critical patent/AT118414B/en

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Description

  

   <Desc/Clms Page number 1> 
 



  Verfahren   zur Herstellung   eines   Überzuges     über die Wickelungen von Motoren,   insbesondere für   Kältemaschinen, zum Schütze gegen Säuren.   



   Bei Elektromotoren, die Säuredämpfen ausgesetzt sind, wie besonders bei   Kältemaschinen,   bei denen zur Vermeidung von Stopfbüchsen der Elektromotor direkt an das Kompressorgehäuse angeschlossen und nach aussen hin gasdicht abgeschlossen ist, muss die Motorwicklung gegen den   Einfluss   der   Säure geschützt   werden. Die bisher angewendeten Imprägnierungen der Isolierung solcher Motorwicklungen bieten keine absolute Sicherheit gegen Beschädigung ; es finden deshalb vielfach Kurzschlüsse und damit   Betriebsstörungen   statt. 



   Einen wirksamen Schutz unter Vermeidung der Stopfbüchse bietet allerdings eine nicht magnetisier-   bare Stahlhaube Über   dem Anker des Motors, wobei der Stator offen sein kann. Dies bedingt aber einen mindestens doppelt so breiten Luftspalt zwischen Stator und Anker, einerseits um Reibungen zwischen Anker und Haube und anderseits die Berührung des Stators mit der letzteren bei Erwärmung des Motors beim Betrieb zu verhüten. Dieser Umstand bewirkt aber bedeutend   stärkere Wilbelstromungen   und damit niedrigen Wirkungsgrad des Motors. 



   Ferner ist es an sich auch bekanntgeworden, Glas und Wasserglas zum Schutz von Wicklungen zu verwenden, indessen dienen diese Stoffe nicht dem durch   die Eifindung angestrebten Zweck.   



   Nach der Erfindung wird ein gasdichter und dauernd haltbarer Schutz der Wicklung selbst gegen die Einwirkung von Säuren, Öl u. dgl. gebildet, so dass eine Schutzhaube vermieden, der Luftspalt auf ein Minimum beschränkt und der Wirkungsgrad auf ein Höchstmass gebracht werden kann. 



   Das den Gegenstand der Erfindung bildende Verfahren zur Herstellung des Überzuges für die Motorwicklung zum Schutze gegen Säure u. dgl. besteht in folgendem : Nachdem die Motorwicklung fertig erstellt und isoliert ist, wird sie mit Doppelwasserglas überzogen. In noch nassem Zustande wird nun diese Schicht dicht mit Glasstaub überdeckt und das Ganze zur Trocknung des Wasserglases erwärmt. 



  Das Wasserglas mit dem Glasstaub bildet dann eine undurchdringliche und festhaftende Hülle, die das Eindringen und die Einwirkung fremder Stoffe auf die Isolierung unmöglich macht und auch gegen Säure   widerstandsfähig ist. Lufträume   in der Isolierung, die das Eindringen von Gasen ermöglichen können, sind dabei ausgeschlossen. 

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



   <Desc / Clms Page number 1>
 



  Process for producing a coating over the windings of motors, in particular for refrigerating machines, for protection against acids.



   In the case of electric motors that are exposed to acid fumes, such as refrigeration machines in particular, in which the electric motor is connected directly to the compressor housing and is gas-tight from the outside to avoid stuffing boxes, the motor winding must be protected against the influence of the acid. The previously used impregnations of the insulation of such motor windings do not offer absolute security against damage; there are therefore many short circuits and thus malfunctions.



   However, a non-magnetizable steel hood over the armature of the motor, whereby the stator can be open, offers effective protection while avoiding the stuffing box. However, this requires an air gap between stator and armature that is at least twice as wide, on the one hand to prevent friction between armature and hood and on the other hand to prevent contact between the stator and the latter when the motor heats up during operation. However, this circumstance causes significantly stronger Wilbelstromungen and thus low efficiency of the motor.



   Furthermore, it has also become known per se to use glass and water glass to protect windings, but these substances do not serve the purpose intended by the invention.



   According to the invention, a gas-tight and permanently durable protection of the winding itself against the action of acids, oil and. Like. Formed, so that a protective hood is avoided, the air gap is reduced to a minimum and the efficiency can be brought to a maximum.



   The subject matter of the invention for producing the coating for the motor winding to protect against acid u. Like. Consists of the following: After the motor winding is finished and insulated, it is covered with double water glass. While it is still wet, this layer is covered tightly with glass dust and the whole is heated to dry the water glass.



  The water glass with the glass dust then forms an impenetrable and firmly adhering shell, which makes it impossible for foreign substances to penetrate into the insulation and which is also resistant to acids. Air spaces in the insulation that could allow gases to penetrate are excluded.

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

 

Claims (1)

PATENT-ANSPRUCH : EMI1.1 lierten Wicklungen mit Doppelwasserglas überzogen, darauf in noch nassem Zustande mit Glasstaub überdeckt und zur Trocknung des Wasserglases erwärmt werden. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: EMI1.1 lated windings covered with double water glass, then covered with glass dust while still wet and heated to dry the water glass. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT118414D 1926-11-01 1927-10-29 Process for producing a coating over the windings of motors, in particular for refrigeration machines, for protection against acids. AT118414B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH118414X 1926-11-01

Publications (1)

Publication Number Publication Date
AT118414B true AT118414B (en) 1930-07-10

Family

ID=4377414

Family Applications (1)

Application Number Title Priority Date Filing Date
AT118414D AT118414B (en) 1926-11-01 1927-10-29 Process for producing a coating over the windings of motors, in particular for refrigeration machines, for protection against acids.

Country Status (1)

Country Link
AT (1) AT118414B (en)

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