EP2640521B1 - Tube mill - Google Patents

Tube mill Download PDF

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Publication number
EP2640521B1
EP2640521B1 EP11701970.3A EP11701970A EP2640521B1 EP 2640521 B1 EP2640521 B1 EP 2640521B1 EP 11701970 A EP11701970 A EP 11701970A EP 2640521 B1 EP2640521 B1 EP 2640521B1
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EP
European Patent Office
Prior art keywords
concrete element
stator yoke
tube mill
electric motor
rotor
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Application number
EP11701970.3A
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German (de)
French (fr)
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EP2640521A1 (en
Inventor
Horst KÜMMLEE
Peter Petereit
Frank Seibicke
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Siemens AG
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Siemens AG
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Publication of EP2640521A1 publication Critical patent/EP2640521A1/en
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Publication of EP2640521B1 publication Critical patent/EP2640521B1/en
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    • 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

Definitions

  • the invention relates to a tube mill.
  • regrind such as Ore chunks are often used in tube mills.
  • the material to be ground is placed in a tubular, rotatably arranged body and, upon rotation of the body, either by its own gravity or by adding ground elements, e.g. Balls, grind.
  • the axis of rotation of the body has a horizontal orientation.
  • the mill body is designed as a rotor of an electric motor, which further comprises a stator with at least two different excitation systems.
  • a tube mill wherein the tube mill has a body rotatably arranged about a rotation axis, wherein ground material for comminution into the body einbringbar ist, wherein the tube mill for rotating driving the body comprises an electric motor, wherein the electric motor having a rotatably connected to the body connected to the rotor body and a rotor disposed around the rotor Statorjoch, wherein the tube mill at least a half of the circumference of Statorsjochs having circumferential concrete element, wherein the stator yoke is connected to the concrete element such that forces acting on the stator yoke are transmitted to the concrete element.
  • the invention makes it possible to reduce deformations of the stator yoke of the electric motor which occur during operation of the electric motor when the electric motor is arranged around the body of the tube mill and drives the body of the tube mill. Furthermore, the invention also allows the reduction of static deformation of the stator yoke.
  • the concrete element at the desired site of the tube mill can be cast in concrete, very large tube mills can be realized and assembled at the site in a simple manner.
  • the concrete element consists of several segments, because then the concrete element can be assembled in a simple manner at the site of the mill of the segments.
  • the segments are for this purpose e.g. connected by screw connections.
  • the concrete element is integrally formed, since then the concrete element is particularly stable and resilient.
  • the concrete element is arranged circumferentially around the entire circumference of the stator yoke, since then the vibrations of the stator yoke are particularly greatly reduced.
  • the invention proves to be particularly applicable to large tube mills, i. Tube mills, whose driving electric motor has an electric power of greater than 5 MW, as advantageous.
  • FIG. 1 is a rear view of a tube mill 1 according to the invention is shown in the form of a schematic perspective view.
  • the tube mill 1 has a tubular order a rotation axis R rotatably arranged body 4, wherein the rotation axis R has a horizontal orientation.
  • FIG. 2 is shown in the form of a schematic perspective view of a front view of the tube mill 1 according to the invention. Same elements are in FIG. 2 provided with the same reference numerals as in FIG. 1 ,
  • ground material for comminution in the body 4 can be introduced via an opening.
  • the tube mill 1 for rotationally driving the body 4 has an electric motor 2 which directly, i. without interposed between the electric motor 2 and body 4 gear, the body 4 rotatably drives and is designed as a ring motor.
  • the electric motor 2 has a housing 8 and winding shields 20. Furthermore, the electric motor 2 on cooler, with the sake of clarity, only a cooler 9 in FIG. 1 is provided with a reference numeral. Furthermore, the tube mill 1 according to the invention on supporting elements 5, on which the body 4 is rotatably mounted.
  • the electric motor 2 has a stationary arranged stator which comprises the dormant arranged essential elements of the electric motor 2 and a rotor which comprises the rotating about the rotation axis R elements of the electric motor 2, on.
  • the essential elements of the stator are attached directly or indirectly to a concrete element 3.
  • FIG. 3 is the concrete element 3 and the stator 7 of the electric motor 2 shown in the form of a schematic perspective view. Same elements are in FIG. 3 provided with the same reference numerals as in FIG. 1 and FIG. 2 ,
  • FIG. 4 is the concrete element 3 and the stator 7 of the electric motor 2 without housing 8, cooler 9 and winding shields 20 shown in the form of a schematic perspective view.
  • the stator 7 of the electric motor 2 has as essential Element on an annular stator yoke 10.
  • the stator yoke 10 consists in the context of the embodiment of Statorjochsegmenten, wherein for the sake of clarity, only two Statorjochsegmente 10a and 10b are provided with a reference numeral.
  • the stator yoke segments are joined together to form the annular stator yoke 10.
  • the circumference of the stator yoke 10 is in FIG. 4 provided with the reference symbol U.
  • the stator yoke 10 may be formed solid or, for example, consist of successively arranged electrically mutually insulated sheets arranged.
  • the stator yoke 10 is made of a magnetically conductive material such as a ferromagnetic material (eg, iron).
  • Statorjoch 10 has recesses in which a stator winding is arranged, the sake of clarity in FIG. 4 not shown.
  • the stator winding generates a magnetic field which rotatably drives the rotor of the electric motor 2 and thus the body 4 attached to the rotor of the electric motor.
  • the tube mill 1 has the concrete element 3 revolving around at least half of the circumference U of the stator yoke 10, the stator yoke 10 being connected to the concrete element 3 in such a way that forces acting on the stator yoke 10 are transmitted to the concrete element 3 , As a result, a good reduction in the vibrations of the stator yoke is achieved.
  • a very good reduction of the vibrations is achieved when the concrete element 3 is arranged circumferentially around at least three quarters of the circumference of the stator yoke.
  • An optimal reduction of the vibrations is achieved if, as shown in the exemplary embodiment, the concrete element 3 is arranged circumferentially around the entire circumference U of the stator yoke 10.
  • the distance AS extending in the radial direction RR from the concrete element 3 to the axis of rotation R is preferably constant, i. the recess for receiving the stator yoke 10 through the concrete element preferably has a part-circular or circular shape.
  • the concrete element 3 is made of concrete or reinforced concrete.
  • the concrete element 3 is constructed of reinforced concrete, i. it has a steel reinforcement arranged inside the concrete element.
  • the concrete element 3 absorbs the forces transmitted to the stator yoke 10 during operation of the tube mill by the rotor of the electric motor and discharges them into the ground.
  • a very rigid supporting structure preferably having a large mass, is realized, which can absorb large forces without being excited to vibrate.
  • the concrete element may, as in the embodiment, be integrally formed, or else, as in FIG. 4 indicated by dashed lines, be composed of several segments, the segments may be bolted together, for example.
  • FIG. 4 are the segment boundaries of the segments 3a, 3b, 3c and 3d, 3e, from which the concrete element 3 may consist, for example, indicated by dashed lines.
  • channels are arranged in the concrete element 3 through the concrete element.
  • fans are arranged.
  • FIG. 4 For the sake of clarity, only one channel 11 and one fan 12 are provided with a reference numeral.
  • FIG. 5 is shown in a form of a schematic representation of a section through the tube mill 1 according to the invention.
  • the same elements are provided with the same reference numerals as in FIG. 1 to FIG. 4 ,
  • the body 4 has a lateral surface 4c and two funnel-shaped end parts 4a and 4b.
  • the body 4 Grist 13 for example, through the opening 6, can be introduced.
  • FIG. 6 is the in FIG. 5 Area marked A is shown enlarged.
  • the same elements are provided with the same reference numerals as in 1 to FIG. 5 , It should be noted that, for the sake of clarity, the steel reinforcement of the concrete element 3 (reinforced concrete) arranged in the interior of the concrete element 3 FIG. 5 and FIG. 6 not shown.
  • the housing 8 of the electric motor 2 is also attached to the concrete element 3 in the context of the embodiment. It should be noted here that in FIG. 6 the fan 12 and the radiator 9 are shown symbolically very highly schematized. The outer terminals of the radiator 9 are connected to cooling lines through which a cooling liquid is pumped through the radiator 9.
  • the air is moved by the electric motor 2 during operation of the fan 12 and flows past the radiator 9, where it is cooled. Accordingly, the air is pumped through the other channels of the concrete element, by means of the fans arranged in the channels.
  • the stator yoke 10 is connected to the concrete element 3 in such a way that forces acting on the stator yoke 10 are transmitted to the concrete element 3. The forces are thereby transmitted to the stator yoke 10 during operation of the tube mill 1 from the rotor 18 via the magnetic field acting between the rotor 18 and the stator yoke 10 and transmitted from the stator yoke 10 to the concrete element 3.
  • the stator yoke 10 is mechanically or directly connected to the concrete element 3 for this purpose. If the stator yoke 10 is directly connected to the concrete element 3, then the stator yoke 10 is directly connected to the concrete element by means of e.g. Fastened screw.
  • stator yoke 10 is indirectly connected to the concrete element 3, then the stator yoke 10 is connected to the concrete element 3 via at least one fastening element.
  • the fastening element can in this case e.g. in the form of a steel ring arranged between the stator yoke and the concrete element, the stator yoke being formed by means of e.g. Screw is fastened to the steel ring and the steel ring, e.g. is fastened by means of screw connections on the concrete element.
  • stator yoke 10 is fastened to the concrete element 3 via fastening elements 14a, 14b, 14c.
  • the fastening element 14a is designed as a steel ring encircling the stator yoke 10, which is fastened to the concrete element 3.
  • the stator yoke 10 has recesses in which a stator winding 21 is arranged, wherein in FIG. 6 only the laterally protruding from the stator yoke 10 winding heads of the stator winding 21 can be seen.
  • the electric motor 2 has a rotor 18, which comprises the elements of the electric motor 2 rotating about the rotation axis R.
  • the rotor 18 has as an essential element on a rotor yoke 16, which consists of a magnetically conductive material, such as a ferromagnetic material, and may be constructed solid or arranged one behind the other against each other electrically insulated sheets.
  • the rotor yoke 16 has recesses in which a rotor winding 17 is arranged, wherein in FIG.
  • the rotor 18 is direct, i. without intermediate gear, connected to the body 4.
  • the electric motor 2 is thus designed as a so-called ring motor.
  • the concrete element does not necessarily, as in the embodiment, a rectangular outer contour must have, but may have any outer contour.

Description

Die Erfindung betrifft eine Rohrmühle. Zur Zerkleinerung von Mahlgut, wie z.B. Erzbrocken, werden häufig Rohrmühlen eingesetzt. Bei Rohrmühlen wird das Mahlgut in einen rohrförmigen rotierbar angeordneten Körper verbracht und beim Rotieren des Körpers entweder durch seine eigene Schwerkraft oder durch Zusetzen von Mahlelementen, wie z.B. Kugeln, zermahlen. Die Rotationsachse des Körpers weist dabei eine waagerechte Ausrichtung auf.The invention relates to a tube mill. For comminution of regrind, such as Ore chunks are often used in tube mills. In tube mills, the material to be ground is placed in a tubular, rotatably arranged body and, upon rotation of the body, either by its own gravity or by adding ground elements, e.g. Balls, grind. The axis of rotation of the body has a horizontal orientation.

Bei Rohrmühlen hängt der Produktionsdurchsatz im Wesentlichen vom Durchmesser des Körpers ab. Der Antrieb von kleineren Rohrmühlen erfolgt handelsüblich über Getriebe und dazu passende Elektromotoren. Bei größeren Rohrmühlen ist aus Verschleißgründen die Verwendung von Getriebelösungen zum Antrieb des Körpers unrentabel. Deshalb werden größere Rohrmühlen über einen sogenannten Ringmotor angetrieben, der gleich einem aufrecht stehenden Ring um den Körper herum angeordnet ist und den Körper direkt, d.h. ohne zwischengeschaltetes Getriebe, rotatorisch antreibt. Dabei befindet sich zwischen Rotor und Statorjoch des Ringmotors ein nur wenige Millimeter großer Luftspalt. Um einen sicheren und zuverlässigen Betrieb des Ringmotors zu gewährleisten, darf es zu keinem mechanischen Kontakt zwischen Rotor und Statorjoch des Ringmotors und somit zu keinen starken Schwingungen des Statorjochs des Ringmotors beim Betrieb der Rohrmühle kommen.In tube mills, the production throughput depends essentially on the diameter of the body. The drive of smaller tube mills is commercially available via gearbox and matching electric motors. For larger tube mills, the use of gear solutions to drive the body is unprofitable due to wear. Therefore, larger tube mills are driven by a so-called ring motor, which is arranged around an upright ring around the body and directly supports the body, i. without intermediate gearbox, rotatory drives. It is located between the rotor and stator yoke of the ring motor only a few millimeters large air gap. In order to ensure safe and reliable operation of the ring motor, there must be no mechanical contact between the rotor and stator yoke of the ring motor and thus no strong vibrations of the stator yoke of the ring motor during operation of the tube mill.

Aus der DE 10 2007 005 131 B3 ist eine Rohrmühle mit einem Mühlenkörper bekannt. Dabei ist der Mühlenkörper als Rotor eines Elektromotors ausgebildet, welcher weiterhin einen Stator mit zumindest zwei unterschiedlichen Erregungssystemen aufweist.From the DE 10 2007 005 131 B3 is a tube mill with a mill body known. In this case, the mill body is designed as a rotor of an electric motor, which further comprises a stator with at least two different excitation systems.

Es ist Aufgabe der Erfindung, bei einem um den Körper der Rohrmühle angeordneten, den Körper der Rohrmühle antreibenden Elektromotor beim Betrieb des Elektromotors auftretende Schwingungen des Statorjochs des Elektromotors zu reduzieren.It is an object of the invention, at a arranged around the body of the tube mill, driving the body of the tube mill Electric motor during operation of the electric motor occurring to reduce vibrations of the stator yoke of the electric motor.

Diese Aufgabe wird gelöst durch eine Rohrmühle, wobei die Rohrmühle einen um eine Rotationsachse rotierbar angeordneten Körper aufweist, wobei Mahlgut zur Zerkleinerung in den Körper einbringbar ist, wobei die Rohrmühle zum rotierenden Antreiben des Körpers einen Elektromotor aufweist, wobei der Elektromotor einen mit dem Körper drehfest verbundenen um den Körper angeordneten Rotor und ein um den Rotor ruhend angeordnetes Statorjoch aufweist, wobei die Rohrmühle ein um mindestens die Hälfte des Umfangs des Statorsjochs umlaufendes Betonelement aufweist, wobei das Statorjoch derart mit dem Betonelement verbunden ist, dass auf das Statorjoch einwirkende Kräfte auf das Betonelement übertragen werden.This object is achieved by a tube mill, wherein the tube mill has a body rotatably arranged about a rotation axis, wherein ground material for comminution into the body einbringbar ist, wherein the tube mill for rotating driving the body comprises an electric motor, wherein the electric motor having a rotatably connected to the body connected to the rotor body and a rotor disposed around the rotor Statorjoch, wherein the tube mill at least a half of the circumference of Statorsjochs having circumferential concrete element, wherein the stator yoke is connected to the concrete element such that forces acting on the stator yoke are transmitted to the concrete element.

Weiterhin ermöglicht die Erfindung, bei einem um den Körper der Rohrmühle angeordneten, den Körper der Rohrmühle antreibenden Elektromotor beim Betrieb des Elektromotors auftretende Verformungen des Statorjochs des Elektromotors zu reduzieren. Weiterhin ermöglicht die Erfindung auch die Reduzierung von statischen Verformungen des Statorjochs.Furthermore, the invention makes it possible to reduce deformations of the stator yoke of the electric motor which occur during operation of the electric motor when the electric motor is arranged around the body of the tube mill and drives the body of the tube mill. Furthermore, the invention also allows the reduction of static deformation of the stator yoke.

Da weiterhin das Betonelement am gewünschten Aufstellungsort der Rohrmühle aus Beton gegossen werden kann, können sehr große Rohrmühlen realisiert werden und am Aufstellungsort auf einfache Art und Weise zusammengebaut werden.Further, since the concrete element at the desired site of the tube mill can be cast in concrete, very large tube mills can be realized and assembled at the site in a simple manner.

Vorteilhafte Ausbildungen der Erfindung ergeben sich aus den abhängigen Ansprüchen.Advantageous embodiments of the invention will become apparent from the dependent claims.

Es erweist sich als vorteilhaft, wenn das Betonelement aus mehreren Segmenten besteht, denn dann kann das Betonelement auf einfache Art und Weise am Aufstellungsort der Mühle aus den Segmenten zusammengesetzt werden. Die Segmente werden hierzu z.B. über Schraubverbindungen miteinander verbunden.It proves to be advantageous if the concrete element consists of several segments, because then the concrete element can be assembled in a simple manner at the site of the mill of the segments. The segments are for this purpose e.g. connected by screw connections.

Weiterhin erweist es sich als vorteilhaft, wenn das Betonelement einstückig ausgebildet ist, da dann das Betonelement besonders stabil und belastbar ist.Furthermore, it proves to be advantageous if the concrete element is integrally formed, since then the concrete element is particularly stable and resilient.

Weiterhin erweist es sich als vorteilhaft, wenn das Betonelement um mindestens drei Viertel des Umfangs des Statorjochs umlaufend angeordnet ist, da dann die Schwingungen des Statorjochs stark reduziert werden.Furthermore, it proves to be advantageous if the concrete element by at least three quarters of the circumference of the stator yoke is arranged circumferentially, since then the vibrations of the stator yoke are greatly reduced.

Ferner erweist es sich als vorteilhaft, wenn das Betonelement um den gesamten Umfang des Statorjochs umlaufend angeordnet ist, da dann die Schwingungen des Statorjochs besonders stark reduziert werden.Furthermore, it proves to be advantageous if the concrete element is arranged circumferentially around the entire circumference of the stator yoke, since then the vibrations of the stator yoke are particularly greatly reduced.

Weiterhin erweist es sich als vorteilhaft, wenn der in radiale Richtung verlaufende Abstand vom Betonelement zur Rotationsachse konstant ist, da dann die Schwingungen des Statorjochs besonders stark reduziert werden.Furthermore, it proves to be advantageous if the distance extending in the radial direction from the concrete element to the axis of rotation is constant, since then the vibrations of the stator yoke are particularly greatly reduced.

Ferner erweist es sich als vorteilhaft, wenn im Betonelement Kanäle zur Kühlung des Ringmotors angeordnet sind, da dann der Elektromotor besonders effektiv gekühlt wird.Furthermore, it proves to be advantageous if in the concrete element channels for cooling the ring motor are arranged, since then the electric motor is cooled particularly effectively.

Die Erfindung erweist sich, insbesondere bei großen Rohrmühlen, d.h. Rohrmühlen, deren antreibender Elektromotor eine elektrische Leistung von größer als 5 MW aufweist, als vorteilhaft.The invention proves to be particularly applicable to large tube mills, i. Tube mills, whose driving electric motor has an electric power of greater than 5 MW, as advantageous.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im Folgenden näher erläutert. Dabei zeigen:

FIG 1
eine Rückansicht der erfindungsgemäßen Rohrmühle,
FIG 2
eine Vorderansicht der erfindungsgemäßen Rohrmühle,
FIG 3
ein Betonelement und ein Stator des Elektromotors,
FIG 4
ein Betonelement und ein Statorjoch des Elektromotors,
FIG 5
eine Schnittansicht der erfindungsgemäßen Rohrmühle und
FIG 6
ein vergrößerter Ausschnitt von FIG 5.
An embodiment of the invention is illustrated in the drawing and will be explained in more detail below. Showing:
FIG. 1
a rear view of the tube mill according to the invention,
FIG. 2
a front view of the tube mill according to the invention,
FIG. 3
a concrete element and a stator of the electric motor,
FIG. 4
a concrete element and a stator yoke of the electric motor,
FIG. 5
a sectional view of the tube mill according to the invention and
FIG. 6
an enlarged section of FIG. 5 ,

In FIG 1 ist in Form einer schematisierten perspektivischen Darstellung eine Rückansicht eine erfindungsgemäße Rohrmühle 1 dargestellt. Die Rohrmühle 1 weist einen rohrförmigen um eine Rotationsachse R rotierbar angeordneten Körper 4 auf, wobei die Rotationsachse R eine waagrechte Ausrichtung aufweist. In FIG 2 ist in Form einer schematisierten perspektivischen Darstellung eine Frontansicht der erfindungsgemäßen Rohrmühle 1 dargestellt. Gleiche Elemente sind in FIG 2 mit den gleichen Bezugszeichen versehen wie in FIG 1.In FIG. 1 is a rear view of a tube mill 1 according to the invention is shown in the form of a schematic perspective view. The tube mill 1 has a tubular order a rotation axis R rotatably arranged body 4, wherein the rotation axis R has a horizontal orientation. In FIG. 2 is shown in the form of a schematic perspective view of a front view of the tube mill 1 according to the invention. Same elements are in FIG. 2 provided with the same reference numerals as in FIG. 1 ,

In den Körper 4 ist über eine Öffnung 6 Mahlgut zur Zerkleinerung in den Körper 4 einbringbar. Weiterhin weist die Rohrmühle 1 zum rotierenden Antreiben des Körpers 4 einen Elektromotor 2 auf, der direkt, d.h. ohne zwischen Elektromotor 2 und Körper 4 zwischengeschaltetes Getriebe, den Körper 4 rotatorisch antreibt und als Ringmotor ausgebildet ist.In the body 4 6 ground material for comminution in the body 4 can be introduced via an opening. Furthermore, the tube mill 1 for rotationally driving the body 4 has an electric motor 2 which directly, i. without interposed between the electric motor 2 and body 4 gear, the body 4 rotatably drives and is designed as a ring motor.

Der Elektromotor 2 weist ein Gehäuse 8 und Wicklungsschilde 20 auf. Weiterhin weist der Elektromotor 2 Kühler auf, wobei der Übersichtlichkeit halber nur ein Kühler 9 in FIG 1 mit einem Bezugszeichen versehen ist. Weiterhin weist die erfindungsgemäße Rohrmühle 1 Stützelemente 5 auf, auf denen der Körper 4 rotierend gelagert ist.The electric motor 2 has a housing 8 and winding shields 20. Furthermore, the electric motor 2 on cooler, with the sake of clarity, only a cooler 9 in FIG. 1 is provided with a reference numeral. Furthermore, the tube mill 1 according to the invention on supporting elements 5, on which the body 4 is rotatably mounted.

Der Elektromotor 2 weist einen ruhend angeordneten Stator, der die ruhend angeordneten wesentlichen Elemente des Elektromotors 2 umfasst und einen Rotor, der die um die Rotationsachse R rotierenden Elemente des Elektromotors 2 umfasst, auf. Im Rahmen des Ausführungsbeispiels sind die wesentlichen Elemente des Stators direkt oder indirekt an einem Betonelement 3 befestigt.The electric motor 2 has a stationary arranged stator which comprises the dormant arranged essential elements of the electric motor 2 and a rotor which comprises the rotating about the rotation axis R elements of the electric motor 2, on. In the context of the embodiment, the essential elements of the stator are attached directly or indirectly to a concrete element 3.

In FIG 3 ist das Betonelement 3 und der Stator 7 des Elektromotors 2 in Form einer schematisierten perspektivischen Darstellung dargestellt. Gleiche Elemente sind in FIG 3 mit den gleichen Bezugszeichen versehen wie in FIG 1 und FIG 2.In FIG. 3 is the concrete element 3 and the stator 7 of the electric motor 2 shown in the form of a schematic perspective view. Same elements are in FIG. 3 provided with the same reference numerals as in FIG. 1 and FIG. 2 ,

In FIG 4 ist das Betonelement 3 und der Stator 7 des Elektromotors 2 ohne Gehäuse 8, Kühler 9 und Wickelschilde 20 in Form einer schematisierten perspektivischen Darstellung dargestellt. Der Stator 7 des Elektromotors 2 weist als wesentliches Element ein ringförmiges Statorjoch 10 auf. Das Statorjoch 10 besteht im Rahmen des Ausführungsbeispiels aus Statorjochsegmenten, wobei der Übersichtlichkeit halber nur zwei Statorjochsegmente 10a und 10b mit einem Bezugszeichen versehen sind. Die Statorjochsegmente sind zu dem ringförmigen Statorjoch 10 zusammengefügt.In FIG. 4 is the concrete element 3 and the stator 7 of the electric motor 2 without housing 8, cooler 9 and winding shields 20 shown in the form of a schematic perspective view. The stator 7 of the electric motor 2 has as essential Element on an annular stator yoke 10. The stator yoke 10 consists in the context of the embodiment of Statorjochsegmenten, wherein for the sake of clarity, only two Statorjochsegmente 10a and 10b are provided with a reference numeral. The stator yoke segments are joined together to form the annular stator yoke 10.

Der Umfang des Statorjochs 10 ist in FIG 4 mit dem Bezugszeichen U versehen. Das Statorjoch 10 kann dabei massiv ausgebildet sein oder aber z.B. auch aus hintereinander angeordneten elektrisch gegeneinander isoliert angeordneten Blechen bestehen. Das Statorjoch 10 besteht aus einem magnetisch leitfähigen Material, wie z.B. einem ferromagnetischen Material (z.B. Eisen).The circumference of the stator yoke 10 is in FIG. 4 provided with the reference symbol U. The stator yoke 10 may be formed solid or, for example, consist of successively arranged electrically mutually insulated sheets arranged. The stator yoke 10 is made of a magnetically conductive material such as a ferromagnetic material (eg, iron).

Im Statorjoch 10 weist Ausnehmungen auf in denen eine Statorwicklung angeordnet ist, die der Übersichtlichkeit halber in FIG 4 nicht dargestellt ist. Die Statorwicklung erzeugt im Betrieb des Elektromotors 2 ein Magnetfeld, das den Rotor des Elektromotors 2 und damit den am Rotor des Elektromotors befestigten Körper 4 rotatorisch antreibt. Beim Betrieb der Rohrmühle werden vom Körper auf den Rotor des Elektromotors und vom Rotor über das zwischen Rotor und Statotjoch wirkende Magnetfeld Kräfte auf das Statorjoch des Elektromotors übertragen, die das Statorjoch zum Schwingen anregen, was schlimmstenfalls dazuführen kann, dass der zwischen Rotor und Stator des Elektromotors angeordnete Luftspalt überbrückt wird und das Statorjoch an den Rotor des Elektromotors anstößt was zu Beschädigungen oder Zerstörung des Rotors und des Statorjochs führen kann. Zur Reduzierung der Schwingungen weist die erfindungsgemäße Rohrmühle 1 das um mindestens die Hälfte des Umfangs U des Statorsjochs 10 umlaufende Betonelement 3 auf, wobei das Statorjoch 10 derart mit dem Betonelement 3 verbunden ist, dass auf das Statorjoch 10 einwirkende Kräfte auf das Betonelement 3 übertragen werden. Hierdurch wird eine gute Reduzierung der Schwingungen des Statorjochs erreicht.In Statorjoch 10 has recesses in which a stator winding is arranged, the sake of clarity in FIG. 4 not shown. During operation of the electric motor 2, the stator winding generates a magnetic field which rotatably drives the rotor of the electric motor 2 and thus the body 4 attached to the rotor of the electric motor. During operation of the tube mill, forces are transmitted from the body to the rotor of the electric motor and from the rotor via the magnetic field acting between the rotor and the stator yoke to the stator yoke of the electric motor, which excite the stator yoke to oscillate, which can in the worst case lead to the rotor to the stator Electric motor arranged air gap is bridged and the stator yoke abuts the rotor of the electric motor which can lead to damage or destruction of the rotor and the stator yoke. In order to reduce the vibrations, the tube mill 1 according to the invention has the concrete element 3 revolving around at least half of the circumference U of the stator yoke 10, the stator yoke 10 being connected to the concrete element 3 in such a way that forces acting on the stator yoke 10 are transmitted to the concrete element 3 , As a result, a good reduction in the vibrations of the stator yoke is achieved.

Eine sehr gute Reduzierung der Schwingungen wird erreicht, wenn das Betonelement 3 um mindestens drei Viertel des Umfangs des Statorjochs umlaufend angeordnet ist. Eine optimale Reduzierung der Schwingungen wird erreicht, wenn wie im Ausführungsbeispiel dargestellt, das Betonelement 3 um den gesamten Umfang U des Statorjochs 10 umlaufend angeordnet ist. Der in radiale Richtung RR verlaufende Abstand AS vom Betonelement 3 zur Rotationsachse R ist vorzugsweise konstant, d.h. die zur Aufnahme des Statorjochs 10 durch das Betonelement verlaufende Ausnehmung weist vorzugsweise eine teilkreisförmige oder kreisförmige Form auf.A very good reduction of the vibrations is achieved when the concrete element 3 is arranged circumferentially around at least three quarters of the circumference of the stator yoke. An optimal reduction of the vibrations is achieved if, as shown in the exemplary embodiment, the concrete element 3 is arranged circumferentially around the entire circumference U of the stator yoke 10. The distance AS extending in the radial direction RR from the concrete element 3 to the axis of rotation R is preferably constant, i. the recess for receiving the stator yoke 10 through the concrete element preferably has a part-circular or circular shape.

Da Betonstrukturen gegenüber reinen Stahlstrukturen eine höhere Materialdämpfung aufweisen, werden Schwingungen nicht durch die höhere Steifigkeit des Betons reduziert, sondern auch durch die bessere Dämpfung des Betons.Since concrete structures have a higher material damping compared to pure steel structures, vibrations are not reduced by the higher rigidity of the concrete, but also by the better damping of the concrete.

Das Betonelement 3 besteht aus Beton oder aus Stahlbeton. Im Rahmen des Ausführungsbeispiels ist das Betonelement 3 aus Stahlbeton aufgebaut, d.h. es weist eine im Inneren des Betonelements angeordnete Stahlbewehrung auf.The concrete element 3 is made of concrete or reinforced concrete. In the context of the embodiment, the concrete element 3 is constructed of reinforced concrete, i. it has a steel reinforcement arranged inside the concrete element.

Das Betonelement 3 nimmt die beim Betrieb der Rohrmühle vom Rotor des Elektromotors auf das Statorjoch 10 übertragenen Kräfte auf und leitet sie in den Boden ab. Durch das erfindungsgemäße um das Statorjoch 10 umlaufende Betonelement 3 wird eine sehr steife, vorzugsweise eine große Masse aufweisende tragende Struktur realisiert, die große Kräfte aufnehmen kann, ohne dabei zum Schwingen angeregt zu werden.The concrete element 3 absorbs the forces transmitted to the stator yoke 10 during operation of the tube mill by the rotor of the electric motor and discharges them into the ground. By virtue of the concrete element 3 revolving around the stator yoke 10 according to the invention, a very rigid supporting structure, preferably having a large mass, is realized, which can absorb large forces without being excited to vibrate.

Das Betonelement kann, wie im Ausführungsbeispiel, einstückig ausgebildet sein, oder aber auch, wie in FIG 4 gestrichelt gezeichnet angedeutet, aus mehreren Segmenten zusammengesetzt sein, wobei die Segmente z.B. miteinander verschraubt sein können. In FIG 4 sind dabei die Segmentgrenzen der Segmente 3a, 3b, 3c und 3d, 3e, aus denen das Betonelement 3 z.B. bestehen kann, gestrichelt gezeichnet angedeutet.The concrete element may, as in the embodiment, be integrally formed, or else, as in FIG. 4 indicated by dashed lines, be composed of several segments, the segments may be bolted together, for example. In FIG. 4 are the segment boundaries of the segments 3a, 3b, 3c and 3d, 3e, from which the concrete element 3 may consist, for example, indicated by dashed lines.

Zur Kühlung des Elektromotors 2 sind in dem Betonelement 3 durch das Betonelement 3 verlaufende Kanäle angeordnet. In den Kanälen sind Lüfter angeordnet. In FIG 4 ist der Übersichtlichkeit halber nur ein Kanal 11 und ein Lüfter 12 mit einem Bezugszeichen versehen.For cooling the electric motor 2 3 extending channels are arranged in the concrete element 3 through the concrete element. In the channels fans are arranged. In FIG. 4 For the sake of clarity, only one channel 11 and one fan 12 are provided with a reference numeral.

In FIG 5 ist in einer Form einer schematisierten Darstellung ein Schnitt durch die erfindungsgemäße Rohrmühle 1 dargestellt. Gleiche Elemente sind dabei mit den gleichen Bezugszeichen versehen wie in FIG 1 bis FIG 4. Der Körper 4 weist eine Mantelfläche 4c und zwei trichterförmige Abschlussteile 4a und 4b auf. In den Körper 4 ist Mahlgut 13, z.B. durch die Öffnung 6, einbringbar.In FIG. 5 is shown in a form of a schematic representation of a section through the tube mill 1 according to the invention. The same elements are provided with the same reference numerals as in FIG. 1 to FIG. 4 , The body 4 has a lateral surface 4c and two funnel-shaped end parts 4a and 4b. In the body 4 Grist 13, for example, through the opening 6, can be introduced.

In FIG 6 ist der in FIG 5 mit A gekennzeichnete Bereich vergrößert dargestellt. Gleiche Elemente sind dabei mit den gleichen Bezugszeichen versehen wie in FIG 1 bis FIG 5. Es sein dabei angemerkt, dass der Übersichtlichkeit halber, die im Inneren des Betonelements 3 angeordnete Stahlbewehrung des Betonelements 3 (Stahlbeton) in FIG 5 und FIG 6 nicht dargestellt ist.In FIG. 6 is the in FIG. 5 Area marked A is shown enlarged. The same elements are provided with the same reference numerals as in 1 to FIG. 5 , It should be noted that, for the sake of clarity, the steel reinforcement of the concrete element 3 (reinforced concrete) arranged in the interior of the concrete element 3 FIG. 5 and FIG. 6 not shown.

Das Gehäuse 8 des Elektromotors 2 ist im Rahmen des Ausführungsbeispiels ebenfalls am Betonelement 3 befestigt. Es sei hier angemerkt, dass in FIG 6 der Lüfter 12 und der Kühler 9 nur sehr stark schematisiert symbolisch dargestellt sind. Die Außenanschlüsse des Kühlers 9 werden an Kühlleitungen angeschlossen, über die eine Kühlflüssigkeit durch den Kühler 9 gepumpt wird.The housing 8 of the electric motor 2 is also attached to the concrete element 3 in the context of the embodiment. It should be noted here that in FIG. 6 the fan 12 and the radiator 9 are shown symbolically very highly schematized. The outer terminals of the radiator 9 are connected to cooling lines through which a cooling liquid is pumped through the radiator 9.

Durch den Kanal 3 wird beim Betrieb des Lüfters 12 die Luft durch den Elektromotor 2 bewegt und strömt am Kühler 9 vorbei, wo sie gekühlt wird. Entsprechend wird auch die Luft durch die anderen Kanäle des Betonelements, mittels der in den Kanälen angeordneten Lüfter, gepumpt.Through the channel 3, the air is moved by the electric motor 2 during operation of the fan 12 and flows past the radiator 9, where it is cooled. Accordingly, the air is pumped through the other channels of the concrete element, by means of the fans arranged in the channels.

Das Statorjoch 10 ist derart mit dem Betonelement 3 verbunden, dass auf das Statorjoch 10 einwirkende Kräfte auf das Betonelement 3 übertragen werden. Die Kräfte werden dabei beim Betrieb der Rohrmühle 1 vom Rotor 18 über das zwischen Rotor 18 und Statorjoch 10 wirkende Magnetfeld auf das Statorjoch 10 übertragen und vom Statorjoch 10 auf das Betonelement 3 übertragen. Das Statorjoch 10 ist hierzu mechanisch mit dem Betonelement 3 direkt oder indirekt verbunden. Wenn dass Statorjoch 10 direkt mit dem Betonelement 3 verbunden ist, dann ist das Statorjoch 10 direkt am Betonelement mittels z.B. Schraubverbindungen befestigt. Wenn das Statorjoch 10 indirekt mit dem Betonelement 3 verbunden ist, dann ist das Statorjoch 10 über mindestens ein Befestigungselement mit dem Betonelement 3 verbunden. Das Befestigungelement kann dabei z.B. in Form eines zwischen Statorjoch und Betonelement angeordneten Stahlrings bestehen, wobei das Statorjoch mittels z.B. Schraubverbindungen an dem Stahlring befestigt ist und der Stahlring z.B. mittels Schraubverbindungen am Betonelement befestigt ist.The stator yoke 10 is connected to the concrete element 3 in such a way that forces acting on the stator yoke 10 are transmitted to the concrete element 3. The forces are thereby transmitted to the stator yoke 10 during operation of the tube mill 1 from the rotor 18 via the magnetic field acting between the rotor 18 and the stator yoke 10 and transmitted from the stator yoke 10 to the concrete element 3. The stator yoke 10 is mechanically or directly connected to the concrete element 3 for this purpose. If the stator yoke 10 is directly connected to the concrete element 3, then the stator yoke 10 is directly connected to the concrete element by means of e.g. Fastened screw. If the stator yoke 10 is indirectly connected to the concrete element 3, then the stator yoke 10 is connected to the concrete element 3 via at least one fastening element. The fastening element can in this case e.g. in the form of a steel ring arranged between the stator yoke and the concrete element, the stator yoke being formed by means of e.g. Screw is fastened to the steel ring and the steel ring, e.g. is fastened by means of screw connections on the concrete element.

Im Rahmen des Ausführungsbeispiels ist das Statorjoch 10 über Befestigungselemente 14a, 14b, 14c an dem Betonelement 3 befestigt. Im Rahmen des Ausführungsbeispiels ist das Befestigungselement 14a dabei als ein um das Statorjoch 10 umlaufender Stahlring ausgebildet, der am Betonelement 3 befestigt ist.In the context of the exemplary embodiment, the stator yoke 10 is fastened to the concrete element 3 via fastening elements 14a, 14b, 14c. In the context of the exemplary embodiment, the fastening element 14a is designed as a steel ring encircling the stator yoke 10, which is fastened to the concrete element 3.

Das Statorjoch 10 weist Ausnehmungen auf in denen eine Statorwicklung 21 angeordnet ist, wobei in FIG 6 nur die seitlich aus dem Statorjoch 10 herausragenden Wickelköpfe der Statorwicklung 21 zu sehen sind. Weiterhin weist der Elektromotor 2 einen Rotor 18 auf, der die um die Rotationsachse R rotierenden Elemente des Elektromotors 2 umfasst. Der Rotor 18 weist als wesentliches Element ein Rotorjoch 16 auf, das aus einem magnetisch leitenden Material, wie z.B. einem ferromagnetischen Material, besteht und massiv oder aus hintereinander angeordneten gegeneinander elektrisch isolierten Blechen aufgebaut sein kann. Das Rotorjoch 16 weist Ausnehmungen auf in denen eine Rotorwicklung 17 angeordnet ist, wobei in FIG 6 nur die seitlich aus dem Rotorjoch 16 herausragenden Wickelköpfe der Rotorwicklung 17 zu sehen sind. Beim Betrieb des Elektromotors fließt ein Strom durch die Rotorwicklung 17, so dass sich am Rotorjoch 17 magnetische Pole ausbilden. Das Rotorjoch 17 ist über Befestigungselemente 19a, 19b, 19c mit dem Körper 4 der Rohrmühle verbunden. Das Rotorjoch 16 des Rotors 18, ist um den Umfang des Körpers 4 angeordnet. Zwischen Rotor 18 und Statorjoch 10 ist ein Luftspalt 15 angeordnet. Der Körper 4 ist durch ein zwischen Rotor 18 und Statorjoch 10 wirkendes Magnetfeld rotatorisch antreibbar.The stator yoke 10 has recesses in which a stator winding 21 is arranged, wherein in FIG. 6 only the laterally protruding from the stator yoke 10 winding heads of the stator winding 21 can be seen. Furthermore, the electric motor 2 has a rotor 18, which comprises the elements of the electric motor 2 rotating about the rotation axis R. The rotor 18 has as an essential element on a rotor yoke 16, which consists of a magnetically conductive material, such as a ferromagnetic material, and may be constructed solid or arranged one behind the other against each other electrically insulated sheets. The rotor yoke 16 has recesses in which a rotor winding 17 is arranged, wherein in FIG. 6 only the laterally protruding from the rotor yoke 16 winding heads of the rotor winding 17 can be seen. During operation of the electric motor, a current flows through the rotor winding 17, so that magnetic poles form on the rotor yoke 17. The rotor yoke 17 is connected via fasteners 19a, 19b, 19c to the body 4 of the tube mill. The rotor yoke 16 of the rotor 18 is arranged around the circumference of the body 4. Between the rotor 18 and stator yoke 10, an air gap 15 is arranged. The body 4 is rotationally driven by a magnetic field acting between the rotor 18 and the stator yoke 10.

Der Rotor 18 ist direkt, d.h. ohne zwischengeschaltetes Getriebe, mit dem Körper 4 verbunden. Der Elektromotor 2 ist somit als sogenannter Ringmotor ausgebildet.The rotor 18 is direct, i. without intermediate gear, connected to the body 4. The electric motor 2 is thus designed as a so-called ring motor.

Es sei an dieser Stelle angemerkt, dass der Übersichtlichkeit halber, die zwischen den einzelnen Elementen der Rohrmühle realisierten Schraub- oder Schweißverbindungen zur Verbindung der einzelnen Elemente, nicht dargestellt sind.It should be noted at this point that the sake of clarity, the realized between the individual elements of the tube mill screw or welded connections for connecting the individual elements, not shown.

Weiterhin sei angemerkt, dass das Betonelement nicht unbedingt, wie im Ausführungsbeispiel, eine rechteckförmige Außenkontur aufweisen muss, sondern eine beliebige Außenkontur aufweisen kann.Furthermore, it should be noted that the concrete element does not necessarily, as in the embodiment, a rectangular outer contour must have, but may have any outer contour.

Weiterhin sei angemerkt, dass auch noch weitere Komponenten der Rohrmühle, wie z.B. Umrichter, Ölversorgungsaggregate etc., am Betonelement oder in Ausnehmungen des Betonelements angeordnet sein können.It should also be noted that also other components of the tube mill, such as e.g. Inverter, oil supply units, etc., can be arranged on the concrete element or in recesses of the concrete element.

Claims (8)

  1. Tube mill (1), wherein the tube mill (1) has a body (4) rotatably disposed about an axis of rotation (R), wherein material to be ground (13) can be fed into the body (4) for comminution, wherein the tube mill (1) has an electric motor (2) for rotationally driving the body (4), wherein the electric motor (2) has a rotor (18) disposed around the body (4) and co-rotationally connected to the body (4), and a stator yoke (10) disposed stationarily around the rotor (18), characterised in that the tube mill (1) has a concrete element (3) running around at least half the circumference (U) of the stator yoke (10), wherein the stator yoke (10) is connected to the concrete element (3) such that forces acting on the stator yoke (10) are transferred to the concrete element (3).
  2. Tube mill (1) according to claim 1,
    characterised in that the concrete element (3) consists of a plurality of segments (3a,3b,3c,3d,3e).
  3. Tube mill (1) according to claim 1,
    characterised in that the concrete element (3) is embodied in one piece.
  4. Tube mill (1) according to one of the preceding claims,
    characterised in that the concrete element (3) is disposed so as to run around at least three-quarters of the circumference (U) of the stator yoke (10).
  5. Tube mill (1) according to one of the preceding claims,
    characterised in that the concrete element (3) is disposed so as to run around the entire circumference (U) of the stator yoke (10).
  6. Tube mill (1) according to one of the preceding claims,
    characterised in that the distance (AS) running in the radial direction (RR) from the concrete element (3) to the axis of rotation (R) is constant.
  7. Tube mill (1) according to one of the preceding claims,
    characterised in that ducts (11) for cooling the wrap-around motor are disposed in the concrete element.
  8. Tube mill (1) according to one of the preceding claims,
    characterised in that the electric motor (2) has a power output of greater than 5 MW.
EP11701970.3A 2011-01-25 2011-01-25 Tube mill Active EP2640521B1 (en)

Applications Claiming Priority (1)

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PCT/EP2011/050950 WO2012100818A1 (en) 2011-01-25 2011-01-25 Tube mill

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CN (1) CN103338866B (en)
AU (1) AU2011357265B2 (en)
BR (1) BR112013018372B1 (en)
CA (1) CA2825449C (en)
ES (1) ES2523775T3 (en)
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FR2994107B1 (en) * 2012-08-03 2015-06-19 Ge Energy Power Conversion Technology Ltd ROTARY DRUM APPARATUS COMPRISING A ROTARY DRUM AND AT LEAST ONE ELECTRIC DRUM DRIVE MOTOR, WITH A STATOR EXTENDING ONLY ONE PART OF THE CIRCUMFERENCE OF THE DRUM
CN104190507A (en) * 2014-09-04 2014-12-10 河南工业大学 Self-driven rasping machine
EP3029806A1 (en) 2014-12-05 2016-06-08 Siemens Aktiengesellschaft Component for an electric machine
EP3046225A1 (en) 2015-01-16 2016-07-20 Siemens Aktiengesellschaft Electric rotary machine having one-sided cooling, and method for one-sided cooling
EP3280038A1 (en) 2016-08-03 2018-02-07 Siemens Aktiengesellschaft Drive device

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DE1179629B (en) 1962-05-12 1964-10-15 Siemens Ag Housings for electrical machines, particularly electric motors, made of cement mortar or concrete
GB1381583A (en) * 1973-04-06 1975-01-22 Smidth & Co As F L Rotary drums
CN2150662Y (en) * 1993-01-16 1993-12-22 天津市起重电机厂 Shock-resistant motor
JPH0723541A (en) * 1993-06-30 1995-01-24 Toshiba Corp Rotor winding end securing metal
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EP2061137A1 (en) * 2007-11-19 2009-05-20 Siemens Aktiengesellschaft Method for mechanically connecting a disk motor

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MX2013008584A (en) 2013-10-07
EP2640521A1 (en) 2013-09-25
BR112013018372B1 (en) 2020-07-14
CN103338866B (en) 2015-05-13
AU2011357265A1 (en) 2013-08-01
BR112013018372A2 (en) 2016-10-11
US20130306773A1 (en) 2013-11-21
AU2011357265B2 (en) 2015-04-02
CN103338866A (en) 2013-10-02
CA2825449A1 (en) 2012-08-02
WO2012100818A1 (en) 2012-08-02
ES2523775T3 (en) 2014-12-01
US9233373B2 (en) 2016-01-12
CA2825449C (en) 2015-10-06

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