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EP2673091A1 - Stator core for a gearless drive of a tube mill - Google Patents

Stator core for a gearless drive of a tube mill

Info

Publication number
EP2673091A1
EP2673091A1 EP12703292.8A EP12703292A EP2673091A1 EP 2673091 A1 EP2673091 A1 EP 2673091A1 EP 12703292 A EP12703292 A EP 12703292A EP 2673091 A1 EP2673091 A1 EP 2673091A1
Authority
EP
European Patent Office
Prior art keywords
stator core
stator
pieces
core pieces
tube mill
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.)
Withdrawn
Application number
EP12703292.8A
Other languages
German (de)
French (fr)
Inventor
Axel Fürst
Christian Horstmann
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.)
ABB Schweiz AG
Original Assignee
ABB Schweiz 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=44148332&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2673091(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by ABB Schweiz AG filed Critical ABB Schweiz AG
Priority to EP12703292.8A priority Critical patent/EP2673091A1/en
Publication of EP2673091A1 publication Critical patent/EP2673091A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18—Details
    • B02C17/24—Driving mechanisms
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators

Definitions

  • the present invention relates to the field of gearless drives of tube mills. It relates to a stator core for receiving stator windings for a gearless drive a tube mill.
  • Tube mills are used for grinding ores, in particular copper ores. Also other ground material such case ⁇ play cement products is ground in tube mills.
  • a mill body of a tube mill is aligned with a rotational axis transverse to a gravitational field and is offset by a drive in a rotational movement about the axis of rotation.
  • a gearless drive for carrying out the rotary movement is often present in large tube mills.
  • a rotor of the gearless drive is mounted directly on the mill body.
  • a stator is arranged outside around the rotor.
  • the stator which typically has a diameter of 6 to 15 meters, includes a stator core and stator frame ei ⁇ NEN.
  • the stator core is divided into stator core pieces, which can also be referred to as stator core parts.
  • Typical for a gearless drive are between 2 and 6 stator core pieces.
  • the Sta ⁇ torkern accommodates stator windings.
  • the stator core is connected to a foundation via the outer stator frame and mechanically fixed in position. For operational safety, the rigidity of the stator must be so be big as possible vibration problems to vermei ⁇ .
  • stator core pieces are connected only to the stator frame so that a connection between the stator core pieces takes place only indirectly via the stator frame.
  • stator core makes only a small contribution to the rigidity of the stator, since this is divided. In this case, especially the stator frame determines the rigidity of the stator. As a result, an increased cost of materials in the stator frame and consequently also in the stator is necessary.
  • Object of the present invention is to provide a stator with sufficient rigidity with reduced material costs for a gearless drive a tube mill available, the stator is a stator core, which is divided into stator core pieces, and ei ⁇ nem radially outside the stator core Sta arranged ⁇ gate frame has.
  • Subject of the invention is to connect the stator core in the rotational direction of the tube mill to each other so that a force or a moment directly, that is to say is inde pendent of ⁇ a stator frame, transferable. Due to the resulting increased rigidity of the stator core, it is possible with the same stiffness of the stator to reduce the cost of materials of the stator frame and the materi ⁇ alaufwand of the stator.
  • the connection direction is defined by the position of the stator core pieces to ⁇ each other and is not necessarily identical to the direction in which the connection can absorb forces.
  • the stator core be ⁇ makes a positive connection between two of the stator core. This means that between the two stator core pieces any form of undercut so that partial contours of the two stator core pieces mesh and occur under load the connection surface pressures on the part contours. As a result, the stator core pieces are subjected to pressure.
  • a further advantageous embodiment relates to a bolt, pin or rivet connection such as a screw connection between two of the stator core pieces, so as to allow a release of the connection.
  • This also includes using an additional element, such as a tab or clip.
  • a further advantageous embodiment relates to a toothing such as a serration between two of the stator core pieces.
  • the toothing also includes round partial contours. The teeth allow easy connection.
  • a further advantageous embodiment relates to a dovetail connection between two of the stator core pieces.
  • a further advantageous embodiment relates to a material-locking connection between two of the stator core such as a welded, soldered or Klebeverbin ⁇ dung. This minimizes the occurrence of notch effects in the connection.
  • a further advantageous embodiment relates to a frictionally engaged connection, which may also be referred to as a frictional connection, such as a clamped press connection.
  • a frictionally engaged connection such as a clamped press connection.
  • overloads of the connection are very well tolerated, as a non-destructive slipping in case of overload is possible.
  • a further advantageous embodiment relates to a positive connection between two of the Statorkernstü ⁇ bridge, in which additionally a frictional engagement occurs.
  • the ⁇ se combination of positive engagement and frictional engagement has both a high static and dynamic load capacity.
  • a further advantageous embodiment relates to a prestressed serration between two of the stator core pieces, which is biased by a traction element such as a rope, a wire or a belt. This connection is very easy to manufacture.
  • the invention will be explained in more detail with reference to Patsbei ⁇ play in connection with the figures.
  • the figures each show a radial section transverse to a rotation axis of a tube mill through a stator core, the stator core being subdivided into four stator core pieces, which are characterized by:
  • Fig. 1 shows a stator core in a radial section.
  • the stator core is circular and divided into four stator core pieces 1.
  • the stator core is at least partially made of egg ⁇ nem magnetizable material such as steel and adapted to receive the stator windings, which are not shown in FIG. 1.
  • the stator core 1 wei ⁇ sen respectively at a first end a notch-shaped deepen Fung and at a second end of a notch-shaped projection.
  • the notch-shaped recesses and projections have an identical part contour so that, for a circular arrangement of the stator core pieces 1 each form a recess of a Statorkern fermentes 1 and a projection of an adjacent Statorkern thoroughlyes notch-shaped contact ⁇ levels and forms a serration.
  • 3 Radially outside the circular arrangement of the stator core pieces 1 there is a cable 2, which clamps the stator core pieces 1 in tension with each other. The result is a ge ⁇ connected circular ring with high rigidity.
  • the circular design of the stator core can be performed alter ⁇ natively by other geometries.
  • the only restriction of freedom of design is a quasi-rotationally symmetrical shape of the stator core in order to ermögli ⁇ chen a smooth rotation of a mill body.
  • the number of stator core pieces can be varied as desired. It is further also possible Sta ⁇ torkern technicallye with only pits or pre jumps provided at each of both ends of the stator core so that ⁇ piert a respective recess in a protrusion in the circular arrangement of the stator core. It is also possible to use other partial contours for the toothing, in particular with several depressions or projections at one end.
  • stator core pieces It is only necessary to ensure that an undercut of the stator core pieces is guaranteed.
  • the tensioning of the stator core pieces can also take place in the tangential direction by other tension elements, such as a wire, a belt or screws. These traction elements may also be present in the stator core pieces or radially within the circular arrangement of the stator core pieces.
  • Fig. 2 shows stator core pieces 1 with straight ends so that arise in a circular arrangement of the stator core 1 contact surfaces in the radial direction.
  • tabs 4 are positioned in the region of the contact surfaces so that the tabs 4 overlap in the tangential direction with the respective stator core pieces 1 of a contact surface and are connected to these stator core pieces 1 by screws 5 in the radial direction.
  • stator core pieces with bevelled ends. It is also possible that the stator core pieces do not touch but form a gap. It can be dispensed with a tab if the Sta ⁇ torkern GmbHen themselves overlap with each other or the screwed connection takes place in the tangential direction. The screw connections in the radial and tangential direction can be prestressed and thus lead to an additional frictional engagement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Crushing And Grinding (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

The core has a stator frame, and a stator for a gearless drive of a tube mill. Stator core pieces (1) are connected with one another in a rotating direction of the tube mill by bolt, pin or rivet connection independent of the stator frame, where the stator core is partially made from magnetizable material i.e. steel. Each stator core piece has a curb-shaped recess and a curb-shaped projection at respective ends. A wire (2) is formed radially at an outer side of the stator core pieces for tensing the stator core pieces, and latches are formed in an area of contact surfaces. An independent claim is also included for a method for manufacturing a stator core.

Description

BESCHREIBUNG  DESCRIPTION
Statorkern für einen getriebelosen Antrieb einer Rohrmühle Stator core for a gearless drive of a tube mill
TECHNISCHES GEBIET TECHNICAL AREA
Die vorliegende Erfindung bezieht sich auf das Gebiet ge- triebeloser Antriebe von Rohrmühlen. Sie betrifft einen Statorkern zur Aufnahme von Statorwicklungen für einen getriebelosen Antrieb einer Rohrmühle. The present invention relates to the field of gearless drives of tube mills. It relates to a stator core for receiving stator windings for a gearless drive a tube mill.
STAND DER TECHNIK STATE OF THE ART
Rohrmühlen werden zum Mahlen von Erzen, insbesondere von Kupfererzen, verwendet. Auch anderes Mahlgut wie zum Bei¬ spiel Zementprodukte wird in Rohrmühlen zermahlen. Dabei ist ein Mühlenkörper einer Rohrmühle mit einer Drehachse quer zu einem Gravitationsfeld ausgerichtet und wird von einem Antrieb in eine Drehbewegung um die Drehachse ver- setzt. Tube mills are used for grinding ores, in particular copper ores. Also other ground material such case ¬ play cement products is ground in tube mills. In this case, a mill body of a tube mill is aligned with a rotational axis transverse to a gravitational field and is offset by a drive in a rotational movement about the axis of rotation.
Wie in US 3,272,444 offenbart ist bei grossen Rohrmühlen oft ein getriebeloser Antrieb zur Ausführung der Drehbewegung vorhanden. Hierbei ist ein Rotor des getriebelosen Antriebes direkt auf dem Mühlenkörper angebracht. Als Ge- genstück ist ein Stator aussen um den Rotor herum angeordnet. Der Stator, welcher typischerweise einen Durchmesser von 6 bis 15 m aufweist, umfasst einen Statorkern und ei¬ nen Statorrahmen. Für den Transport ist der Statorkern in Statorkernstücke, die auch als Statorkernteile bezeichnet werden können, unterteilt. Typisch für einen getriebelosen Antrieb sind zwischen 2 und 6 Statorkernstücke. Der Sta¬ torkern nimmt Statorwicklungen auf. Über den aussen liegenden Statorrahmen ist der Statorkern mit einem Fundament verbunden und in seiner Lage mechanisch fixiert. Für die Betriebssicherheit muss die Steifigkeit des Stators so gross wie möglich sein, um Schwingungsprobleme zu vermei¬ den . As disclosed in US Pat. No. 3,272,444, a gearless drive for carrying out the rotary movement is often present in large tube mills. Here, a rotor of the gearless drive is mounted directly on the mill body. As counterpart, a stator is arranged outside around the rotor. The stator, which typically has a diameter of 6 to 15 meters, includes a stator core and stator frame ei ¬ NEN. For transport, the stator core is divided into stator core pieces, which can also be referred to as stator core parts. Typical for a gearless drive are between 2 and 6 stator core pieces. The Sta ¬ torkern accommodates stator windings. The stator core is connected to a foundation via the outer stator frame and mechanically fixed in position. For operational safety, the rigidity of the stator must be so be big as possible vibration problems to vermei ¬.
Bei den bekannten Statorkernen sind die Statorkernstücke nur mit dem Statorrahmen verbunden so, dass eine Verbin- dung zwischen den Statorkernstücken nur indirekt über den Statorrahmen erfolgt. Hierbei leistet der Statorkern nur einen kleinen Beitrag zur Steifigkeit des Stators, da dieser geteilt ist. In diesem Falle bestimmt vor allem der Statorrahmen die Steifigkeit des Stators. Dadurch ist ein erhöhter Materialaufwand bei dem Statorrahmen und daraus folgend auch bei dem Stator nötig.  In the known stator cores, the stator core pieces are connected only to the stator frame so that a connection between the stator core pieces takes place only indirectly via the stator frame. Here, the stator core makes only a small contribution to the rigidity of the stator, since this is divided. In this case, especially the stator frame determines the rigidity of the stator. As a result, an increased cost of materials in the stator frame and consequently also in the stator is necessary.
DARSTELLUNG DER ERFINDUNG PRESENTATION OF THE INVENTION
Aufgabe der vorliegenden Erfindung ist es, einen Stator mit ausreichender Steifigkeit bei vermindertem Material- aufwand für einen getriebelosen Antrieb einer Rohrmühle zur Verfügung zu stellen, wobei der Stator einen Statorkern, welcher in Statorkernstücke unterteilt ist, und ei¬ nem radial ausserhalb des Statorkernes angeordneten Sta¬ torrahmen aufweist. Object of the present invention is to provide a stator with sufficient rigidity with reduced material costs for a gearless drive a tube mill available, the stator is a stator core, which is divided into stator core pieces, and ei ¬ nem radially outside the stator core Sta arranged ¬ gate frame has.
Diese Aufgabe wird durch einen Statorkern für einen getriebelosen Antrieb einer Rohrmühle mit den Merkmalen des Patentanspruches 1 gelöst. Bevorzugte Aus führungs formen sind Gegenstand der abhängigen Patentansprüche. This object is achieved by a stator core for a gearless drive a tube mill with the features of claim 1. Preferred embodiments are the subject of the dependent claims.
Gegenstand der Erfindung ist es, die Statorkernstücke in Drehrichtung der Rohrmühle miteinander so zu verbinden, dass eine Kraft oder ein Moment direkt, dass heisst unab¬ hängig von einem Statorrahmen, übertragbar ist. Durch die daraus resultierende erhöhte Steifigkeit des Statorkernes, ist es möglich bei gleichbleibender Steifigkeit des Sta- tors den Materialaufwand des Statorrahmens und den Materi¬ alaufwand des Stators zu vermindern. Die Verbindungsrichtung ist definiert durch die Lage Der Statorkernstücke zu¬ einander und ist nicht zwingend mit der Richtung, in der die Verbindung Kräfte aufnehmen kann, identisch. Eine erste bevorzugte Aus führungs form des Statorkernes be¬ trifft eine formschlüssige Verbindung zwischen zwei der Statorkernstücke. Das heisst, dass zwischen den beiden Statorkernstücken irgendeine Form von Hinterschneidung be- steht so, dass Teilkonturen der beiden Statorkernstücke ineinandergreifen und bei Belastung der Verbindung Flächenpressungen auf den Teilkonturen auftreten. Dadurch werden die Statorkernstücke auf Druck belastet. Subject of the invention is to connect the stator core in the rotational direction of the tube mill to each other so that a force or a moment directly, that is to say is inde pendent of ¬ a stator frame, transferable. Due to the resulting increased rigidity of the stator core, it is possible with the same stiffness of the stator to reduce the cost of materials of the stator frame and the materi ¬ alaufwand of the stator. The connection direction is defined by the position of the stator core pieces to ¬ each other and is not necessarily identical to the direction in which the connection can absorb forces. A first preferred disclosed embodiment, the stator core be ¬ makes a positive connection between two of the stator core. This means that between the two stator core pieces any form of undercut so that partial contours of the two stator core pieces mesh and occur under load the connection surface pressures on the part contours. As a result, the stator core pieces are subjected to pressure.
Eine weitere vorteilhafte Ausführungsform betrifft eine Bolzen-, Stift- oder Nietverbindung wie beispielsweise eine Schraubenverbindung zwischen zwei der Statorkernstücke, um so ein Lösen der Verbindung zu ermöglichen. Dies um- fasst auch eine Verwendung eines zusätzlichen Elementes, wie etwa einer Lasche oder einer Klammer.  A further advantageous embodiment relates to a bolt, pin or rivet connection such as a screw connection between two of the stator core pieces, so as to allow a release of the connection. This also includes using an additional element, such as a tab or clip.
Eine weitere vorteilhafte Ausführungsform betrifft eine Verzahnung wie beispielsweise eine Kerbverzahnung zwischen zwei der Statorkernstücke. Hierbei umfasst die Verzahnung auch runde Teilkonturen. Die Verzahnung ermöglicht eine einfache Herstellung der Verbindung. A further advantageous embodiment relates to a toothing such as a serration between two of the stator core pieces. In this case, the toothing also includes round partial contours. The teeth allow easy connection.
Eine weitere vorteilhafte Ausführungsform betrifft eine Schwalbenschwanzverbindung zwischen zwei der Statorkernstücke. Dadurch sind zusätzlich zu Druckkräften auch Zugkräfte aufnehmbar. A further advantageous embodiment relates to a dovetail connection between two of the stator core pieces. As a result, tensile forces can be absorbed in addition to compressive forces.
Eine weitere vorteilhafte Ausführungsform betrifft eine stoffschlüssige Verbindung zwischen zwei der Statorkernstücke wie etwa eine Schweiss-, Löt- oder Klebeverbin¬ dung. Dadurch wird ein Auftreten von Kerbwirkungen in der Verbindung minimiert wird. A further advantageous embodiment relates to a material-locking connection between two of the stator core such as a welded, soldered or Klebeverbin ¬ dung. This minimizes the occurrence of notch effects in the connection.
Eine weitere vorteilhafte Ausführungsform betrifft eine reibschlüssige Verbindung, welche auch als kraftschlüssige Verbindung bezeichnet werden kann, wie etwa eine Klemmoder Pressverbindung. Dadurch werden Überlastungen der Verbindung sehr gut toleriert, da ein zerstörungsfreies Durchrutschen im Überlastfall möglich ist. Eine weitere vorteilhafte Ausführungsform betrifft eine formschlüssige Verbindung zwischen zwei der Statorkernstü¬ cke, bei welcher zusätzlich ein Reibschluss auftritt. Die¬ se Kombination aus Formschluss und Reibschluss hat sowohl eine hohe statische wie auch dynamische Tragfähigkeit. A further advantageous embodiment relates to a frictionally engaged connection, which may also be referred to as a frictional connection, such as a clamped press connection. As a result, overloads of the connection are very well tolerated, as a non-destructive slipping in case of overload is possible. A further advantageous embodiment relates to a positive connection between two of the Statorkernstü ¬ bridge, in which additionally a frictional engagement occurs. The ¬ se combination of positive engagement and frictional engagement has both a high static and dynamic load capacity.
Eine weitere vorteilhafte Ausführungsform betrifft eine vorgespannte Kerbverzahnung zwischen zwei der Statorkernstücke, welche durch ein Zugkraftelement wie etwa ein Seil, einen Draht oder einen Gurt vorgespannt ist. Diese Verbindung ist sehr einfach zu fertigen.  A further advantageous embodiment relates to a prestressed serration between two of the stator core pieces, which is biased by a traction element such as a rope, a wire or a belt. This connection is very easy to manufacture.
DARSTELLUNG DER ERFINDUNG PRESENTATION OF THE INVENTION
Nachfolgend wird die Erfindung anhand von Ausführungsbei¬ spielen im Zusammenhang mit den Figuren näher erläutert. Die Figuren zeigen jeweils einen Radialschnitt quer zu ei- ner Drehachse einer Rohrmühle durch einen Statorkern, wobei der Statorkern in vier Statorkernstücke unterteilt ist, welche durch: The invention will be explained in more detail with reference to Ausführungsbei ¬ play in connection with the figures. The figures each show a radial section transverse to a rotation axis of a tube mill through a stator core, the stator core being subdivided into four stator core pieces, which are characterized by:
Figur 1 vorgespannte Kerbverzahnungen miteinander verbunden sind;  Figure 1 prestressed serrations are interconnected;
Figur 2 Schraubenverbindungen miteinander verbunden sind . Figure 2 screw connections are interconnected.
Die in den Zeichnungen verwendeten Bezugszeichen sind in der Bezugszeichenliste zusammengefasst . Grundsätzlich sind gleiche Teile mit denselben Bezugszeichen versehen. WEGE ZUR AUSFÜHRUNG DER ERFINDUNG  The reference numerals used in the drawings are summarized in the list of reference numerals. Basically, the same parts are provided with the same reference numerals. WAYS FOR CARRYING OUT THE INVENTION
Fig. 1 zeigt einen Statorkern in einem Radialschnitt. Der Statorkern ist kreisförmig und in vier Statorkernstücke 1 unterteilt. Der Statorkern ist zumindest teilweise aus ei¬ nem magnetisierbaren Material, wie etwa Stahl, gefertigt und geeignet Statorwicklungen aufzunehmen, welche in der Fig. 1 nicht dargestellt sind. Die Statorkernstücke 1 wei¬ sen jeweils an einem ersten Ende eine kerbförmige Vertie- fung und an einem zweiten Ende einen kerbförmigen Vorsprung auf. Die kerbförmigen Vertiefungen und Vorsprünge besitzen eine identische Teilkontur so, dass bei einer kreisförmigen Anordnung der Statorkernstücke 1 jeweils ei- ne Vertiefung eines Statorkernstückes 1 und ein Vorsprung eines benachbarten Statorkernstückes kerbförmige Kontakt¬ ebenen bilden und eine Kerbverzahnung 3 formen. Radial ausserhalb der kreisförmigen Anordnung der Statorkernstücke 1 befindet sich ein Seil 2, welches die Statorkernstü- cke 1 auf Zug miteinander verspannt. So entsteht ein ge¬ schlossener Kreisring mit hoher Steifigkeit. Fig. 1 shows a stator core in a radial section. The stator core is circular and divided into four stator core pieces 1. The stator core is at least partially made of egg ¬ nem magnetizable material such as steel and adapted to receive the stator windings, which are not shown in FIG. 1. The stator core 1 wei ¬ sen respectively at a first end a notch-shaped deepen Fung and at a second end of a notch-shaped projection. The notch-shaped recesses and projections have an identical part contour so that, for a circular arrangement of the stator core pieces 1 each form a recess of a Statorkernstückes 1 and a projection of an adjacent Statorkernstückes notch-shaped contact ¬ levels and forms a serration. 3 Radially outside the circular arrangement of the stator core pieces 1 there is a cable 2, which clamps the stator core pieces 1 in tension with each other. The result is a ge ¬ connected circular ring with high rigidity.
Die kreisförmige Gestaltung des Statorkernes kann alter¬ nativ auch durch andere Geometrien ausgeführt werden. Einzige Restriktion der Gestaltungsfreiheit ist dabei eine quasi rotationssymmetrische Gestalt des Statorkernes, um eine problemlose Rotation eines Mühlenkörpers zu ermögli¬ chen. Des Weiteren kann die Anzahl der Statorkernstücke beliebig variiert werden. Es ist weiter auch möglich, Sta¬ torkernstücke mit ausschliesslich Vertiefungen oder Vor- Sprüngen an jeweils beiden Enden der Statorkernstücke vorzusehen so, dass in der kreisförmigen Anordnung der Statorkernstücke je eine Vertiefung zu einem Vorsprung grup¬ piert. Auch eine Verwendung anderer Teilkonturen für die Verzahnung, insbesondere mir mehreren Vertiefungen bezie- hungsweise Vorsprüngen an einem Ende, ist möglich. Es ist lediglich darauf zu achten, dass eine Hinterschneidung der Statorkernstücke gewährleistet ist. Die Verspannung der Statorkernstücke kann auch durch andere Zugkraftelemente wie etwa ein Draht, ein Gurt oder Schrauben in tangentia- 1er Richtung erfolgen. Diese Zugkraftelemente können auch in den Statorkernstücken oder radial innerhalb der kreisförmigen Anordnung der Statorkernstücke vorhanden sein.The circular design of the stator core can be performed alter ¬ natively by other geometries. The only restriction of freedom of design is a quasi-rotationally symmetrical shape of the stator core in order to ermögli ¬ chen a smooth rotation of a mill body. Furthermore, the number of stator core pieces can be varied as desired. It is further also possible Sta ¬ torkernstücke with only pits or pre jumps provided at each of both ends of the stator core so that grup ¬ piert a respective recess in a protrusion in the circular arrangement of the stator core. It is also possible to use other partial contours for the toothing, in particular with several depressions or projections at one end. It is only necessary to ensure that an undercut of the stator core pieces is guaranteed. The tensioning of the stator core pieces can also take place in the tangential direction by other tension elements, such as a wire, a belt or screws. These traction elements may also be present in the stator core pieces or radially within the circular arrangement of the stator core pieces.
Fig. 2 zeigt Statorkernstücke 1 mit geraden Enden so, dass bei einer kreisförmigen Anordnung der Statorkernstücke 1 Kontaktflächen in radialer Richtung entstehen. Radial ausserhalb der kreisförmigen Anordnung der Statorkernstücke 1 sind im Bereich der Kontaktflächen Laschen 4 positioniert so, dass die Laschen 4 in tangentialer Richtung mit den jeweiligen Statorkernstücken 1 einer Kontaktfläche überlappen und mit diesen Statorkernstücken 1 durch Schrauben 5 in radialer Richtung verbunden sind. Fig. 2 shows stator core pieces 1 with straight ends so that arise in a circular arrangement of the stator core 1 contact surfaces in the radial direction. Radially outside the circular arrangement of the stator core pieces 1, tabs 4 are positioned in the region of the contact surfaces so that the tabs 4 overlap in the tangential direction with the respective stator core pieces 1 of a contact surface and are connected to these stator core pieces 1 by screws 5 in the radial direction.
Es können auch Statorkernstücke mit schrägen Enden verwendet werden. Es ist weiter möglich, dass sich die Statorkernstücke nicht berühren sondern einen Abstand bilden. Es kann auf eine Lasche verzichtet werden, falls die Sta¬ torkernstücken selbst miteinander überlappen oder die Ver- schraubung in tangentialer Richtung erfolgt. Die Schraubenverbindungen in radialer und tangentialer Richtung können vorgespannt sein und so zu einem zusätzlichen Reib- schluss führen. It is also possible to use stator core pieces with bevelled ends. It is also possible that the stator core pieces do not touch but form a gap. It can be dispensed with a tab if the Sta ¬ torkernstücken themselves overlap with each other or the screwed connection takes place in the tangential direction. The screw connections in the radial and tangential direction can be prestressed and thus lead to an additional frictional engagement.
BEZUGSZEICHENLISTELIST OF REFERENCE NUMBERS
1, 1' Statorkernstück1, 1 'stator core piece
2 Seil 2 rope
3 Kerbverzahnung 3 serrations
4 Lasche 4 tab
5 Schraube  5 screw

Claims

Patentansprüche claims
1. Statorkern zur Aufnahme von Statorwicklungen für einen getriebelosen Antrieb einer Rohrmühle, wobei der Sta¬ torkern zusammen mit einem Statorrahmen einen Stator für einen getriebelosen Antrieb einer Rohrmühle bildet und der Statorkern aus Statorkernstücken (1, 1') zusammengesetzt ist, dadurch gekennzeichnet, dass die Statorkernstücke in Drehrichtung der Rohrmühle unab¬ hängig von dem Statorrahmen miteinander verbunden sind. 1. stator core for receiving stator windings for a gearless drive a tube mill, wherein the Sta ¬ torkern forms a stator for a gearless drive a tube mill together with a stator frame and the stator core of stator core pieces (1, 1 ') is composed, characterized in that the stator core are inde pendent ¬ connected in the direction of rotation of the tube mill of the stator frame with each other.
2. Statorkern nach Anspruch 1, dadurch gekennzeichnet, dass zwei der Statorkernstücke formschlüssig miteinan¬ der verbunden sind. 2. stator core according to claim 1, characterized in that two of the stator core pieces positively miteinan ¬ are connected.
3. Statorkern nach Anspruch 2, dadurch gekennzeichnet, dass die zwei Statorkernstücke durch eine Bolzen-, 3. stator core according to claim 2, characterized in that the two stator core pieces by a bolt,
Stift- oder Nietverbindung miteinander verbunden sind. Pin or rivet connection are interconnected.
4. Statorkern nach Anspruch 2, dadurch gekennzeichnet, dass die zwei Statorkernstücke durch eine Verzahnung miteinander verbunden sind. 4. stator core according to claim 2, characterized in that the two stator core pieces are interconnected by a toothing.
5. Statorkern nach Anspruch 2, dadurch gekennzeichnet, dass die zwei Statorkernstücke durch eine Schwalben¬ schwanzverbindung miteinander verbunden sind. 5. stator core according to claim 2, characterized in that the two stator core pieces are connected to each other by a Schwalben ¬ tail connection.
6. Statorkern nach Anspruch 1, dadurch gekennzeichnet, dass zwei der Statorkernstücke stoffschlüssig mitein- ander verbunden sind. 6. stator core according to claim 1, characterized in that two of the stator core pieces are materially connected mitein- other.
7. Statorkern nach Anspruch 1, dadurch gekennzeichnet, dass zwei der Statorkernstücke reibschlüssig miteinan¬ der verbunden sind. 7. stator core according to claim 1, characterized in that two of the stator core pieces frictionally miteinan ¬ are connected.
8. Statorkern nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, dass die zwei Statorkernstücke zusätz¬ lich zu der formschlüssigen Verbindung durch eine reibschlüssige Verbindung miteinander verbunden sind. 8. stator core according to one of claims 2 to 5, characterized in that the two stator core pieces are additionally ¬ Lich connected to each other by the positive connection by a frictional connection.
9. Statorkern nach Anspruch 8, dadurch gekennzeichnet, dass die zwei Statorkernstücke durch eine vorgespannte Schraubenverbindung miteinander verbunden sind. 9. stator core according to claim 8, characterized in that the two stator core pieces are interconnected by a prestressed screw connection.
10. Statorkern nach Anspruch 8, dadurch gekennzeichnet, dass die zwei Statorkernstücke durch eine vorgespannte Kerbverzahnung (3) miteinander verbunden sind. 10. stator core according to claim 8, characterized in that the two stator core pieces by a prestressed serration (3) are interconnected.
11. Statorkern nach Anspruch 10, dadurch gekennzeichnet, dass die vorgespannte Kerbverzahnung (3) durch ein Zugkraftelement in Drehrichtung der Rohrmühle vorge¬ spannt ist. 11. stator core according to claim 10, characterized in that the prestressed serration (3) is biased by a traction element in the direction of rotation of the tube mill ¬ .
12. Statorkernstück für einen getriebelosen Antrieb einer Rohrmühle, dadurch gekennzeichnet, dass das Stator¬ kernstück (1) für eine formschlüssige Verbindung mit einem weiteren Statorkernstück ausgebildet ist. 12. Stator core piece for a gearless drive a tube mill, characterized in that the stator core piece ¬ (1) is designed for a positive connection with another stator core piece.
13. Statorkernstück nach Anspruch 12, dadurch gekennzeichnet, dass das Statorkernstück (1') für eine Schraubenverbindung oder eine Kerbverzahnung (3) mit einem weiteren Statorkernstück ausgebildet ist.  13. stator core piece according to claim 12, characterized in that the stator core piece (1 ') for a screw connection or a serration (3) is formed with a further stator core piece.
14. Verfahren zur Herstellung eines Statorkernes für einen getriebelosen Antrieb einer Rohrmühle, wobei der Sta¬ torkern mehrere Statorkernstücke aufweist, welches den folgenden Schritt beinhaltet: 14. A method for producing a stator core for a gearless drive of a tube mill, wherein the Sta ¬ torkern has a plurality of stator core pieces, which includes the following step:
a) Statorkernstücke miteinander verbinden.  a) Connect stator core pieces together.
EP12703292.8A 2011-02-10 2012-02-06 Stator core for a gearless drive of a tube mill Withdrawn EP2673091A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12703292.8A EP2673091A1 (en) 2011-02-10 2012-02-06 Stator core for a gearless drive of a tube mill

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP11154075A EP2486983A1 (en) 2011-02-10 2011-02-10 Stator core for a gearless drive of a tube mill
PCT/EP2012/051913 WO2012107374A1 (en) 2011-02-10 2012-02-06 Stator core for a gearless drive of a tube mill
EP12703292.8A EP2673091A1 (en) 2011-02-10 2012-02-06 Stator core for a gearless drive of a tube mill

Publications (1)

Publication Number Publication Date
EP2673091A1 true EP2673091A1 (en) 2013-12-18

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EP11154075A Withdrawn EP2486983A1 (en) 2011-02-10 2011-02-10 Stator core for a gearless drive of a tube mill
EP12703292.8A Withdrawn EP2673091A1 (en) 2011-02-10 2012-02-06 Stator core for a gearless drive of a tube mill

Family Applications Before (1)

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EP11154075A Withdrawn EP2486983A1 (en) 2011-02-10 2011-02-10 Stator core for a gearless drive of a tube mill

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US (1) US20130328437A1 (en)
EP (2) EP2486983A1 (en)
CN (1) CN103347614A (en)
AU (1) AU2012215538A1 (en)
BR (1) BR112013020525A2 (en)
CA (1) CA2826670A1 (en)
CL (1) CL2013002310A1 (en)
CO (1) CO6781558A2 (en)
MX (1) MX2013009213A (en)
PE (1) PE20141728A1 (en)
WO (1) WO2012107374A1 (en)
ZA (1) ZA201305991B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2733821A1 (en) * 2012-11-14 2014-05-21 GE Energy Power Conversion Technology Ltd A rotating electrical machine having a segmented stator
CN109361274A (en) * 2018-10-30 2019-02-19 湘电风能有限公司 A kind of modular direct-drive permanent-magnetism generator unit stator and direct-drive permanent-magnetism generator

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US3272444A (en) 1963-08-28 1966-09-13 Gen Electric Gearless rotary mill
DE2822993A1 (en) * 1978-05-26 1979-11-29 Bbc Brown Boveri & Cie Direct drive system for rotary kiln or mill - includes guide bearings between stator and rotor of driving motor
CN2061086U (en) * 1989-03-24 1990-08-29 湖北特殊钢信息咨询服务公司 Ball mill driven by linear motion actuator
GB2344224A (en) * 1998-11-30 2000-05-31 Huang Shu Chen Two part laminated stator of motor
US6648252B2 (en) * 2000-10-04 2003-11-18 Emerson Electric Co. Switched reluctance machine and food waste disposer employing switched reluctance machine
KR101033580B1 (en) * 2004-03-03 2011-05-11 엘지전자 주식회사 structure and manufacturing method for spiral core
US7247967B2 (en) * 2004-08-09 2007-07-24 A. O. Smith Corporation Electric motor having a stator
JP4668130B2 (en) * 2006-06-16 2011-04-13 トヨタ自動車株式会社 Stator
DE102007005131B3 (en) * 2007-02-01 2008-01-31 Siemens Ag Ring motor as direct drive, particularly for ore mills or tube mills, comprises stator and rotor formed as rotary mill body, where stator has two different excitation systems and mill body has toothed structure

Non-Patent Citations (1)

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Title
See references of WO2012107374A1 *

Also Published As

Publication number Publication date
EP2486983A1 (en) 2012-08-15
CN103347614A (en) 2013-10-09
CL2013002310A1 (en) 2014-06-27
CO6781558A2 (en) 2013-10-31
PE20141728A1 (en) 2014-11-28
WO2012107374A1 (en) 2012-08-16
ZA201305991B (en) 2014-10-29
US20130328437A1 (en) 2013-12-12
BR112013020525A2 (en) 2018-07-10
CA2826670A1 (en) 2012-08-16
AU2012215538A1 (en) 2013-10-10
MX2013009213A (en) 2014-03-27

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