CH200794A - AC motor with a gas-tight rotor sealed from the rest of the motor interior, especially for driving refrigeration machines - Google Patents

AC motor with a gas-tight rotor sealed from the rest of the motor interior, especially for driving refrigeration machines

Info

Publication number
CH200794A
CH200794A CH200794DA CH200794A CH 200794 A CH200794 A CH 200794A CH 200794D A CH200794D A CH 200794DA CH 200794 A CH200794 A CH 200794A
Authority
CH
Switzerland
Prior art keywords
motor
gas
rest
fan
refrigeration machines
Prior art date
Application number
Other languages
German (de)
Inventor
Oerlikon Maschinenfabrik
Original Assignee
Oerlikon Maschf
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 Oerlikon Maschf filed Critical Oerlikon Maschf
Publication of CH200794A publication Critical patent/CH200794A/en

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K9/00Arrangements for cooling or ventilating
    • H02K9/02Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K5/00Casings; Enclosures; Supports
    • H02K5/04Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/12Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
    • H02K5/128Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas using air-gap sleeves or air-gap discs

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

  

  Wechselstrom-Motor mit gasdicht gegen den übrigen Motorinnenraum abgeschlossenem  Rotor,     insbesondere    zum Antrieb von     Kältemaschinen.       Zum     Antrieb    von     kleinen    Kältekompres  soren werden     meistens        Elektromotoren    ver  wendet, die mit der Kompressorenwelle un  mittelbar gekuppelt sind oder .dieselbe mit  tels Riemens antreiben. Diese Anordnung  hat den Nachteil, dass der Kompressor eine  Stopfbüchsendichtung besitzen muss.

   Es sind  auch Anordnungen bekannt geworden, bei  denen die Stopfbüchse umgangen wird,     in-          .dem    der Rotor des     Elektromotors    in     einer     geschlossenen Büchse aus elektrisch und  magnetisch schlecht     leitendem        Material    läuft.  Dadurch, dass dann die Rotorwelle nicht  mehr zur     Aufnahme        eines        Ventilators    dienen  kann, muss der Elektromotor seine Wärme  natürlich .abführen; oder es muss das Motor  gehäuse mit Wasser     künstlich    gekühlt wer  den.

   Beide Anordnungen bedingen grosse und  teure Motoren.     Ausserdem    haben diese An  ordnungen noch den     Nachteil,    dass die aus  organischen Stoffen     hergestellte        Wicklungs-          isolation    wegen     Fehlens    einer Durchlüftung  zu Schimmelbildung neigt und verfault. Er-    findungsgemäss wird zur Erhöhung der  natürlichen; Kühlwirkung ein Ventilator ver  wendet, der vom Streufeld der Statorspulen  köpfe angetrieben wird.  



  Die beiliegende     Zeichnung        zeigt    zwei  Ausführungsbeispiele des Erfindungsgegen  standes, und zwar je im Schnitt. Der Rotor 1  des Wechselstrommotors ist von einer Hülse 2  gasdicht umgeben     und        treibt    den nicht .ge  zeichneten     Kompressor    an. Auf einem am  Motorgehäuse 4     befestigten        Zapfen    3     sitzt     ein Ventilator 5 (Fig. 2 zeigt die Draufsicht  desselben). Der Ventilator trägt einen Ring,  .der auf der Seite 6 der Wickelköpfe aus  Kupfer und auf der     andern    Seite 7     aus     Eisen besteht.

   Der     Ventilator    liegt so zu  den Statarspulenköpfen 8, dass er vom Streu  feld dieser Spulenköpfe angetrieben wird  und dabei     Luft        .durch    Aussparungen 9 -des  Statorblechkörpers 10 oder allenfalls zwi  schen dem     Blechkörper    10 und dem Ge  häuse 4 hindurch     in.    der angegebenen Pfeil  richtung     ansaugt        bezw.        ausbläst,              Der        Ventilator    5     kann        irgendwelche          zweckdienliche,

          zum        Beispiel    auch die im  Ausführungsbeispiel Fig. 3 gezeigte Form       haben.  



  AC motor with a gas-tight rotor sealed from the rest of the motor interior, especially for driving refrigeration machines To drive small refrigeration compressors, mostly electric motors are used which are directly coupled to the compressor shaft or which drive the same by means of a belt. This arrangement has the disadvantage that the compressor must have a stuffing box seal.

   Arrangements have also become known in which the stuffing box is bypassed, in .dem the rotor of the electric motor runs in a closed box made of electrically and magnetically poorly conductive material. Because the rotor shaft can then no longer serve to accommodate a fan, the electric motor must of course. Dissipate its heat; or the motor housing must be artificially cooled with water.

   Both arrangements require large and expensive motors. In addition, these arrangements have the disadvantage that the winding insulation made from organic materials tends to form mold and rot due to the lack of ventilation. According to the invention, to increase the natural; Cooling effect uses a fan that is driven by the stray field of the stator coil heads.



  The accompanying drawing shows two embodiments of the subject matter of the invention, each in section. The rotor 1 of the AC motor is surrounded gas-tight by a sleeve 2 and drives the not .ge recorded compressor. A fan 5 is seated on a pin 3 fastened to the motor housing 4 (FIG. 2 shows the top view of the same). The fan has a ring, which is made of copper on side 6 of the winding heads and iron on the other side 7.

   The fan is positioned in relation to the stator coil heads 8 in such a way that it is driven by the stray field of these coil heads and thereby sucks in air through the recesses 9 of the stator laminated body 10 or at most between the laminated body 10 and the housing 4 in the direction of the arrow indicated . blows out, the fan 5 can be used for any

          for example also have the shape shown in the exemplary embodiment in FIG.

 

Claims (1)

<B>PATENTANSPRUCH:</B> Wechselstrommotor mit gasdicht .gegen den übrigen Motorinnenraum abgeschlosse- nem Rotor, insbesondere zum Antrieb von Kältemaschinen, dadurch gekennzeichnet, dass zur Erhöhung der natürlichen Kühlwir kung ein Ventilator vorhanden ist, der vom Streufeld der Statorspulenköpfe angetrieben wird. UNTERANSPRÜCHE 1: <B> PATENT CLAIM: </B> AC motor with a gas-tight rotor, which is sealed off from the rest of the motor interior, in particular for driving refrigeration machines, characterized in that a fan is provided to increase the natural cooling effect, which is driven by the stray field of the stator coil heads . SUBClaims 1: Wechselstrommotor nach Patentanspruch, dadurch gekennzeichnet, dass der Venti lator einen den Wickelköpfen zugekehrten Ring trägt, der auf der .Seite der letzteren aus Kupfer und auf der andern Seite aus Eisen besteht: 2. AC motor according to claim, characterized in that the fan carries a ring facing the winding heads, which is made of copper on the side of the latter and of iron on the other side: 2. Wechselstrommotor nach Patentanspruch; dadurch gekennzeichnet, daB der Venti- lator auf einem am Motorgehäuse befestig ten Zapfen gelagert ist. AC motor according to claim; characterized in that the fan is mounted on a pin fastened to the motor housing.
CH200794D 1937-08-10 1937-08-10 AC motor with a gas-tight rotor sealed from the rest of the motor interior, especially for driving refrigeration machines CH200794A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH200794T 1937-08-10

Publications (1)

Publication Number Publication Date
CH200794A true CH200794A (en) 1938-10-31

Family

ID=4442493

Family Applications (1)

Application Number Title Priority Date Filing Date
CH200794D CH200794A (en) 1937-08-10 1937-08-10 AC motor with a gas-tight rotor sealed from the rest of the motor interior, especially for driving refrigeration machines

Country Status (1)

Country Link
CH (1) CH200794A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1036648B (en) * 1955-06-15 1958-08-14 Klaus Maschinen U Appbau F Centrifugal pump without a stuffing box
DE1081966B (en) * 1956-06-30 1960-05-19 Albert Spoerel Fa Cooled slip motor
DE3313768A1 (en) * 1983-04-15 1984-10-18 Elektromotoren Savod "ELPROM", Trojan Asynchronous electric motor having a rotation frequency which can be regulated
EP1748536A1 (en) * 2005-07-30 2007-01-31 ThyssenKrupp Aufzugswerke GmbH Electric motor
EP2256907A1 (en) * 2009-05-18 2010-12-01 Bombardier Transportation GmbH An electric machine
DE102021107981A1 (en) 2021-03-30 2022-10-06 Schaeffler Technologies AG & Co. KG Electric machine with integrated impeller

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1036648B (en) * 1955-06-15 1958-08-14 Klaus Maschinen U Appbau F Centrifugal pump without a stuffing box
DE1081966B (en) * 1956-06-30 1960-05-19 Albert Spoerel Fa Cooled slip motor
DE3313768A1 (en) * 1983-04-15 1984-10-18 Elektromotoren Savod "ELPROM", Trojan Asynchronous electric motor having a rotation frequency which can be regulated
EP1748536A1 (en) * 2005-07-30 2007-01-31 ThyssenKrupp Aufzugswerke GmbH Electric motor
EP2256907A1 (en) * 2009-05-18 2010-12-01 Bombardier Transportation GmbH An electric machine
DE102021107981A1 (en) 2021-03-30 2022-10-06 Schaeffler Technologies AG & Co. KG Electric machine with integrated impeller

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