DE759250C - Device for reducing the risk of cracks forming in the housing jacket, which is cast around the stator core of electrical machines at a distance - Google Patents

Device for reducing the risk of cracks forming in the housing jacket, which is cast around the stator core of electrical machines at a distance

Info

Publication number
DE759250C
DE759250C DES134531D DES0134531D DE759250C DE 759250 C DE759250 C DE 759250C DE S134531 D DES134531 D DE S134531D DE S0134531 D DES0134531 D DE S0134531D DE 759250 C DE759250 C DE 759250C
Authority
DE
Germany
Prior art keywords
risk
stator core
housing jacket
distance
electrical machines
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.)
Expired
Application number
DES134531D
Other languages
German (de)
Inventor
Richard Wagner
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.)
VEM Sachsenwerk GmbH
Original Assignee
Sachsenwerk Licht und Kraft 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 Sachsenwerk Licht und Kraft AG filed Critical Sachsenwerk Licht und Kraft AG
Priority to DES134531D priority Critical patent/DE759250C/en
Application granted granted Critical
Publication of DE759250C publication Critical patent/DE759250C/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12Stationary parts of the magnetic circuit
    • H02K1/18Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/185Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Frames (AREA)

Description

Einrichtung zur Verminderung der Gefahr einer Rißbildung in dem mit Abstand um das Ständerblechpaket elektrischer Maschinen herumgegossenen Gehäusiemantel Es, Ist bekannt, das, Stände@rblechpaket elektrischer Maschinen durch um da-s, Paket herumgegossene Leichtmetallteile zusammenzuhalten. Bei diesen bekannten Ausführungen hat man in der Regel um den; gesamten Umfang des Blechpakets einen geschlossenen Leichtmetallmantel gegossen. DieVerwendung einer Magnes;ium-Alumini@wmrLegierung als Schmelze für die Leichtmetallgehänsetefle macht es erforderlich, besondere Maßnahmen für lern Ausgleich der Sehrumpfspannungen beim Erstarren der Schmelze vorzusehen. Es genügt hierbei nicht, das aus Leichtmetall glegos.sene Gehäuse in bekannter Weise so anzuordnen, das es, von dem Blechpaket einen Abstand hat bzw. sich nur stellenweise auf dem Blechpaket aufstützt. Die Schrumpfkräfte sind nämlich im genannten Fall so groß, daß sie die frei liegenden Gehäuseteile einzubuchten trachten. Durch die, bekannte Anordnung von nachgiebigen Zwischenlagen, etwa aus Asbestmaterial, zwischen den Abstützungsstellen des Gehäuses auf dem Blechpaketrückenwird auch nur eine begrenzte Nachgiebigkeit erzielt, d. h. diese Nachgiebigkeit reicht ebenfalls nicht dazu aus, um die beim Erstarren der Schmelze auftretenden starken Schrumpfkräfte wenigstens so weit auszugleichen, daß die Gefahr von Rißbildungen bzw. Einbuchtungen, in den frei liegenden Gehäuseteilen vermieden wird.Means to reduce the risk of cracking in the with Distance around the laminated stator core of electrical machines cast housing shell It is known that the stator core of electrical machines by um da-s, the package to hold together cast light metal parts. In these known designs one usually has around the; entire circumference of the laminated core a closed Cast light metal jacket. The use of a magnesium-aluminum alloy as a melt for the light metal handle it makes it necessary to take special measures To learn to compensate for the very sump stresses when the melt solidifies. It is not sufficient here to glegos.sene the housing made of light metal in a known manner to be arranged so that it has a distance from the laminated core or is only in places rests on the laminated core. The shrinkage forces are namely in the case mentioned so big that they try to indent the exposed parts of the housing. Through the, known arrangement of flexible intermediate layers, for example made of asbestos material, between the Support points of the housing on the laminated core also achieves limited compliance, d. H. this compliance is enough nor do they prevent the strong effects that occur when the melt solidifies To compensate for shrinkage forces at least so far that the risk of cracking or indentations, is avoided in the exposed housing parts.

Erfindungsgemäß wird der mit Abstand um das Ständerblechpaket herumgegossene, aus Leichtmetall bestehende Gehäusemantel, der die Stirnflächen des Blechpakets stellenweise umklammert und sich an diesen. Stellen auch auf den Blechpaketrücken abstützt, so nachgiebig gestaltet, daß die beim Erkalten der Leichmetallschmelze, insbesondere einer Schmelze aus der obengenannten Legierung, auftretenden Schrumpfspannungen ohne Gefahr einer Rißbildung ausgeglichen werden". Hierzu ist der Gehäusemantel an den Stellen der Umklammerungen unterbrochen, jedoch so" daß sein Zusammenhang in der Umfangsrichtung an diesen Stellern noch durch die auf den Stirnflächen des Blechpakets aufliegenden Klammerteile gewahrt bleibt. Der Gehäusemantel bildet daher gleichwohl in der Umfangsrichtung in an sich bekannter Weise ein zusammenhängendes Ganzes.According to the invention, the spaced around the stator core is cast, Housing shell made of light metal, which covers the end faces of the laminated core clasped in places and adhere to these. Also place on the back of the sheet metal package supported, designed so resilient that when the light metal melt cools, in particular a melt made of the above-mentioned alloy, occurring shrinkage stresses can be leveled out without the risk of cracking. "For this purpose, the housing jacket interrupted at the places of the clasps, but in such a way "that its coherence in the circumferential direction on these actuators by the on the end faces of the The sheet-metal package resting on the clamp parts is preserved. The housing shell therefore forms nevertheless a coherent one in the circumferential direction in a manner known per se Whole.

Ein Ausführungsbeispiel für die Erfindung ist in der Z5eichnung dargestellt. a. ist das Ständerblechpaket mit in an sich bekannter Weise an seinem Rücken b axial verlaufenden Vorsprüngen bzw. Rippen c. Die Abmessungen und die Anordnung dieser Vorsprünge sind in bekannter Weise so gewählt., daß sie innerhalb des durch den Außendurchmesser des Blechpakets bestimmten Quadrats liegen, also keinen zusätzlichen Materialbedarf verursachen. Zwischen die Vorsprünge c sind die Teile il, i.@, i3, i4 des aus Leichtmetall bestehenden Gehäusemantels. i eingegossen, der im übrigen die Stirnflächen des Blechpakets mit Ansätzen e umklammert. Diese Ansätze e wahren allein den Zusammenhang des. Gehäusemantels an den Stellen der Rippen c. Diese Blechpaketvorsprünge c stehen schwa.lbenschwanzartig mit den Leichtmetallteilen il, i3, i3, i4 im Eingriff. Ein gußeiserner Maschinenfuß f ist mittels Schrauben- direkt mit der frei liegenden Oberfläche IL der Blechpaketv orsprünge c verbunden, und der Außendurchmesser der Gehäuseteile il, iz, i3, i4 ist geringer als. der durch die Blechpaketvorsprünge c bestimmte Außendurchmesser des Bl-echpalets, so daß eine Berührung der Maschin,-nfüße f mit dem Gehäuse i nicht möglich ist. Dies gehört jedoch nicht zur Erfindung. Die axial verlaufenden Zwischenräume k zwischen dem B.lechpaketrücken b und den Leichtmetallteilen i dienen in bekannter Weise zur Führung eines In.nenkühlluftstromes der elektrischen Maschine. L sind zusätzliche Abstützungen für den Leichtmetallmantel gegenüber dem Blechpaketrücken b.An embodiment of the invention is shown in the drawing. a. is the stator core with axially extending projections or ribs c on its back b in a manner known per se. The dimensions and the arrangement of these projections are chosen in a known manner so that they lie within the square determined by the outer diameter of the laminated core, that is to say do not cause any additional material requirements. Between the projections c are the parts i1, i. @, I3, i4 of the housing jacket made of light metal. i poured in, which also clasps the end faces of the laminated core with lugs e. These approaches e only maintain the connection of the housing jacket at the points of the ribs c. These lamination packet projections c are in a swab tail-like manner with the light metal parts il, i3, i3, i4 in engagement. A cast-iron machine base f is connected directly to the exposed surface IL of the sheet-metal core projections c by means of screws, and the outer diameter of the housing parts il, iz, i3, i4 is less than. the outer diameter of the sheet-metal pallet determined by the lamination stack projections c, so that the machine feet f cannot come into contact with the housing i. However, this is not part of the invention. The axially extending intermediate spaces k between the sheet metal package back b and the light metal parts i are used in a known manner to guide an internal cooling air flow of the electrical machine. L are additional supports for the light metal jacket opposite the back of the laminated core b.

Der Gehäusemantel i kann nach einem bekannten Gießverfahren am Blechpaket hergestellt «-erden. Vorzugsweise wird man dabei ein solches Verfahren. anwenden, bei dem die Schmelze mit zusätzlicher Kraft in die Form eingebracht wird, z. B. das Spritzgießen.The housing shell i can be made on the laminated core using a known casting process produced «- earth. Such a process is preferred. use, in which the melt is introduced into the mold with additional force, e.g. B. injection molding.

Claims (1)

PATENTANSPRUCH: Einrichtung zur Verminderung der Gefahr einer Rißbildung in dem mit Abstand um das Ständerblechpaket elektrischer Maschinen herumgegossenen, erstarrenden; aus Leichtmetall bestehenden Gehäusemantel, der die Stirnflächen des Blech pakets stellenweise umklammert und sich an diesen Stellen auch auf dem Blechpaketrücken abstützt, dadurch gekennzeichnet, daß der Gehäusemantel (i) an den Stellen der Umklammerungen unterbrochen ist, jedoch so, daß sein Zusammenhang in der Umfangsrichtung an diesen Stellen noch durch die auf den Stirnflächen des Blechpakets (a) aufliegenden Klammerteile (e) gewahrt bleibt. Zur Abgrenzung des Erfindungsgegenstands vom Stand der Technik sind im Erteilungsverfahren folgende Druckschriften in Betracht gezogen worden: Deutsche Patentschriften N r. 54.2:271, 65o i4o; schweizerische Patentschrift N r. 150 ,419; britische Patentschrift Nr. 181 867; USA.-Patentschriften Nr. i 432 637, 1 480312.PATENT CLAIM: Device to reduce the risk of cracking in the cast around the stator core of electrical machines at a distance, freezing; made of light metal housing jacket that covers the end faces of the Sheet metal package clasped in places and at these points also on the sheet metal package back supported, characterized in that the housing jacket (i) at the points of the clasps is interrupted, but so that its connection in the circumferential direction at these Put through the clamp parts resting on the end faces of the sheet metal core (a) (e) is preserved. To differentiate the subject matter of the invention from the state of the art the following publications have been considered in the granting procedure: German patents No. 54.2: 271, 65o 14o; Swiss patent N r. 150, 419; British Patent No. 181,867; U.S. Patents No. i 432 637, 1 480312.
DES134531D 1938-11-10 1938-11-10 Device for reducing the risk of cracks forming in the housing jacket, which is cast around the stator core of electrical machines at a distance Expired DE759250C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES134531D DE759250C (en) 1938-11-10 1938-11-10 Device for reducing the risk of cracks forming in the housing jacket, which is cast around the stator core of electrical machines at a distance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES134531D DE759250C (en) 1938-11-10 1938-11-10 Device for reducing the risk of cracks forming in the housing jacket, which is cast around the stator core of electrical machines at a distance

Publications (1)

Publication Number Publication Date
DE759250C true DE759250C (en) 1953-05-11

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DES134531D Expired DE759250C (en) 1938-11-10 1938-11-10 Device for reducing the risk of cracks forming in the housing jacket, which is cast around the stator core of electrical machines at a distance

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE974429C (en) * 1952-02-14 1960-12-22 Siemens Ag Electrical machine in end shield design

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB181867A (en) * 1921-04-02 1922-06-29 Electric Construction Co Improvements in the method of fixing in place stator cores of induction motors and other laminated cores
US1432637A (en) * 1921-09-21 1922-10-17 Electric Controller & Mfg Co Supported laminations for electric apparatus and method of making the same
US1480312A (en) * 1922-07-26 1924-01-08 Electric Controller & Mfg Co Method of making stators
CH150419A (en) * 1929-11-11 1931-10-31 Siemens Ag Electric motor.
DE542271C (en) * 1929-03-02 1932-01-22 Siemens Schuckertwerke Akt Ges Electric motor, in particular for driving circular saws or other work machines
DE650140C (en) * 1937-09-11 Sachsenwerk Licht & Kraft Ag Housing of electrical machines cast with additional power

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE650140C (en) * 1937-09-11 Sachsenwerk Licht & Kraft Ag Housing of electrical machines cast with additional power
GB181867A (en) * 1921-04-02 1922-06-29 Electric Construction Co Improvements in the method of fixing in place stator cores of induction motors and other laminated cores
US1432637A (en) * 1921-09-21 1922-10-17 Electric Controller & Mfg Co Supported laminations for electric apparatus and method of making the same
US1480312A (en) * 1922-07-26 1924-01-08 Electric Controller & Mfg Co Method of making stators
DE542271C (en) * 1929-03-02 1932-01-22 Siemens Schuckertwerke Akt Ges Electric motor, in particular for driving circular saws or other work machines
CH150419A (en) * 1929-11-11 1931-10-31 Siemens Ag Electric motor.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE974429C (en) * 1952-02-14 1960-12-22 Siemens Ag Electrical machine in end shield design

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