EP2242583B2 - Roller mill - Google Patents

Roller mill Download PDF

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Publication number
EP2242583B2
EP2242583B2 EP10709462.5A EP10709462A EP2242583B2 EP 2242583 B2 EP2242583 B2 EP 2242583B2 EP 10709462 A EP10709462 A EP 10709462A EP 2242583 B2 EP2242583 B2 EP 2242583B2
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EP
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Prior art keywords
roller mill
direct drive
grinding table
grinding
drive
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EP10709462.5A
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German (de)
French (fr)
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EP2242583A1 (en
EP2242583B1 (en
Inventor
Benjamin Berndzen
Markus Berger
Guido Scholz
Franz-Josef Zurhove
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ThyssenKrupp Industrial Solutions AG
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ThyssenKrupp Resource Technologies GmbH
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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
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/006—Ring or disc drive gear arrangement

Definitions

  • the invention relates to a roller mill with a grinding table and at least one rolling on the grinding table grinding roller.
  • Roller mills which are also known as roller mills or vertical mills, are used in particular for the comminution of mineral raw materials and fuels, for example in the cement industry or in power plants.
  • the grinding bowl is driven by a ring motor.
  • a roller mill according to the preamble of claim 1 is known from DE 10 2006 043 179 A1 known.
  • the invention is therefore based on the object to provide a roller mill, the Mahltellerantriebssystem is characterized by a reduced susceptibility and a space-saving arrangement of Mahltellerantriebes as possible.
  • the roller mill according to the invention consists essentially of at least one grinding roller and a grinding table, wherein the grinding table has a downwardly open Mahltellerinnenraum, at least one Mahlrollenantriebssystem for driving the grinding roller and a Mahltellerantriebssystem for driving the Mahltellers.
  • Mahltellerantriebssystem also has a gearless direct drive, which is arranged in the Mahltellerinnenraum and 15% to 30% of the total installed drive power of the roller mill has.
  • the lower part of the grinding plate is bell-shaped or cylindrical, wherein the gearless direct drive is arranged in the interior of the bell-shaped or cylindrical, lower part of the grinding table.
  • the lower susceptibility to interference of the roller mill according to the invention is achieved on the one hand, that the entire drive power is divided, in which on the one hand, the grinding rollers and on the other hand, the grinding plates are driven separately. Furthermore, can be dispensed with by a gearless direct drive on the otherwise common and error-prone transmission for Mahltellerantrieb.
  • the individual drives can be dimensioned correspondingly smaller, so that in the first place an arrangement of gearless direct drive in Mahltellerinnenraum and thus an extremely space-saving arrangement is possible.
  • a roller mill is known, the grinding rollers are driven, each with an independent single drive.
  • an auxiliary drive in the grinding table is integrated to start the roller mill, but only has a capacity of about 2-5% of the total installed capacity of the roller mill.
  • Such an auxiliary drive is also not designed for continuous operation and requires a corresponding reduction, which is achieved here by a rolling on an internal gear pinion or by a friction wheel.
  • the gearless direct drive on a rotor which is mounted on the Mahltellerlagerung of the grinding table.
  • it is rotatably connected to the grinding table, in particular rotatably flanged to the grinding table.
  • the grinding table storage is expediently arranged on a base plate of the roller mill.
  • a transverse flux motor or a high-torque motor with an inner stator and an outer rotor come into consideration.
  • the high-torque motor can advantageously have a rotor with permanent magnet.
  • the gearless direct drive is connected to a control device for controlling the Dircktantriebes to a predetermined drive torque in combination.
  • the direct drive can be regulated in particular to a predetermined proportion of the recorded total power of the roller mill.
  • a control device for the Mahlrollenantriebssystem is provided, which is designed for example as power compensation and beyond also with the gearless direct drive is in communication and regulates this to a predetermined proportion of the recorded total power of the roller mill.
  • the activation of the direct drive is expediently carried out via a frequency converter.
  • a gearless direct drive is used, which can be connected directly to the mains.
  • a speed-controlled DC motor can be used.
  • the drawing shows a schematic, partially sectioned side view of a roller mill.
  • the roller mill shown in the drawing consists essentially of at least one grinding roller 1, a grinding table 2, a Mahlrollenantriebssystem 3 for driving the grinding roller 1 and a Mahltellerantriebssystem for driving the Mahltellers 2, which has a gearless direct drive 4.
  • a grinding path 2a is formed, wherein comminuted Good 5 is comminuted in the gap between the grinding path 2a and grinding roller 1.
  • the grinding table 2 rotates about its central, vertical axis 6, wherein the grinding rollers 1 on the grinding path 2 or on the intervening, to be comminuted Good 5, wherein the grinding roller 1 is pressed by a pressing system 7 against the grinding table 2 ,
  • the grinding table 2 has a Mahltellerinnenraum 2b, which is formed for example by the fact that the lower part of the grinding plate 2 is bell-shaped or cylindrical, so that the gearless direct drive 4 in Mahltellerinnenraum 2b, or in the interior of the bell-shaped or cylindrical, lower Part of the grinding plate 2 can be arranged.
  • the grinding table 2 is supported on a base plate 9 via a grinding table bearing 8, suitable bearings 8a and 8b being provided.
  • the gearless direct drive 4 has an outer rotor 4a and an inner stator 4b, wherein the rotor 4a is flanged on the grinding table 2 (see positions 10, 11).
  • the direct drive 4 can be arranged extremely space-saving inside the grinding table 2. Due to the special connection of the rotor 4a and the stator 4b, the rotor 4a does not require its own storage but is supported by the already existing grinding table bearing 8. In this way, the space is optimally utilized by not necessarily required machine elements (rotor bearing) omitted or be used by existing machine elements (grinding table storage 8). This also includes the direct connection of the stator 4b to the base plate and the absence of couplings.
  • the direct motor 4 can already be mounted in the workshop on the base plate 9, so that on the one hand a high accuracy and on the other hand a simple and fast final assembly can be done on the site.
  • the gearless direct motor 4 can be formed for example by a Transversalpoundmotor or a high-torque motor, wherein the rotor of the high-torque motor is provided with permanent magnets.
  • the resulting low speed of the direct drive also has the advantage in asynchronous machines that speed fluctuations that are triggered by load fluctuations from the grinding process, are not fed back greatly (reflected) in the torsional vibration system.
  • the absence of an additional transmission also has the further advantage that eliminates games in the transmission and thus the susceptibility of the drive is significantly reduced.
  • Mahlrollenantriebssystems 3 and the direct drive 4 via a control device 12.
  • the entire installed drive power of the roller mill is distributed to multiple drives.
  • the direct drive has 15-30% of the total installed drive power.
  • the control device 12 is designed so that it controls the gearless direct drive 4 to its predetermined proportion of the recorded total power of the roller mill. In addition, it can also be regulated to a predetermined drive torque.
  • the control of the direct drive 4 takes place for example via a frequency converter, not shown.
  • the arrangement of the direct drive inside the grinding plate allows a very space-saving arrangement, the elimination of the transmission ensures a significantly reduced susceptibility to interference.
  • special connection of the direct drive 4 additional space and cost is saved.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Massaging Devices (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Saccharide Compounds (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

The roller mill according to the invention substantially comprises at least one grinding roller and a grinding table, the grinding table having a grinding table inner space which is open in a downward direction, at least one grinding roller drive system for driving the grinding roller and a grinding table drive system for driving the grinding table. The grinding table drive system further has a gearless direct drive which is arranged in the grinding table inner space.

Description

Die Erfindung betrifft eine Rollenmühle mit einem Mahlteller und wenigstens einer auf dem Mahlteller abrollenden Mahlrolle.The invention relates to a roller mill with a grinding table and at least one rolling on the grinding table grinding roller.

Rollenmühlen, die auch als Walzenschüssel- oder Vertikalmühlen bekannt sind, werden insbesondere für die Zerkleinerung mineralischer Rohstoffe und Brennstoffe, beispielsweise in der Zementindustrie oder in Kraftwerken, eingesetzt.Roller mills, which are also known as roller mills or vertical mills, are used in particular for the comminution of mineral raw materials and fuels, for example in the cement industry or in power plants.

Sie werden üblicherweise über einen zentralen Antrieb des Mahltellers, oft auch als Mahlschüssel bezeichnet, angetrieben. Die Rollen sind meist antriebslos und werden mit einer Vorrichtung zur Krafterzeugung gegen den rotierenden Mahlteller gedrückt, wobei das Gut im Spalt zwischen Mahlrolle und Mahlteller zerkleinert wird. Bei großen Mühlen kommt es aufgrund der großen Massen der Mahlrollen und des Mahltellers bei einer Laufunruhe zu teilweise großen Kraft- und Momentenschwankungen. Diese führen früher oder später zu Getriebeschäden, die erhebliche Reparaturkosten und Ausfallzeiten bewirken. Dadurch entstehen gravierende nachteilige Auswirkungen auf die Produktion ganzer Werke bzw. Anlagen.They are usually driven by a central drive of the grinding table, often referred to as a grinding bowl. The roles are usually unpowered and are pressed with a device for generating power against the rotating grinding table, the good is crushed in the gap between the grinding roller and grinding plate. In large mills it comes due to the large masses of the grinding rollers and the grinding table in a rough running to sometimes large force and torque fluctuations. These sooner or later lead to gearbox damage, which causes significant repair costs and downtime. This results in serious adverse effects on the production of entire plants or plants.

Aus der DE 19 57 580 A1 ist es bereits bekannt, das stör- und schadensanfällige Getriebe zu eliminieren, indem der Mahlteller durch einen Ringmotor angetrieben wird. Da die Mahltellerdrehzahlen bei üblichen Baugrößen zwischen 15 und 35 Upm liegen, sind für die benötigte Untersetzung der Netzfrequenz auf die Antriebsdrehzahl hohe Polpaarzahlen erforderlich, die wiederum einen großen Durchmesser des Ringmotors erfordern. Der Ringmotor kann daher nur außerhalb des Tellers angebracht werden, damit er nicht mit den Gaskanälen, die den Düsenring um den Mahltelleraußenrand von unten mit Gas versorgen, sowie dem Austragsring und diesem folgende Austragsvorrichtung für durch den Düsenring durchgefallenes Mahlgut kollidiert. Dadurch entsteht ein großer Platzbedarf. Ein Ringmotor muss mit hoher Genauigkeit montiert werden. Durch seine Größe und Einbaulage kann er nicht vollständig in einer Werkstatt vormontiert werden, sodass auf der Baustelle ein hoher Montageaufwand und damit hohe Kosten verursacht werden. Weiterhin ist die Leistungselektronik eines solchen Ringmotors mit hohen Investitionskosten verbunden.From the DE 19 57 580 A1 It is already known to eliminate the interference and damage-susceptible transmission by the grinding table is driven by a ring motor. Since the Mahltellerdrehzahlen are in conventional sizes between 15 and 35 rpm, high pole pair numbers are required for the required reduction of the mains frequency to the drive speed, which in turn require a large diameter of the ring motor. The ring motor can therefore be mounted only outside of the plate, so that it does not collide with the gas channels that supply the nozzle ring around the Mahltelleraußenrand from below with gas, and the discharge ring and this subsequent discharge device for fallen through the nozzle ring regrind. This creates a lot of space. A ring motor must be mounted with high accuracy. Due to its size and installation position, it can not be completely pre-assembled in a workshop, so that a high assembly cost and thus high costs are caused on the site. Furthermore, the power electronics of such a ring motor is associated with high investment costs.

Anstelle eines großen Mahltellerantriebssystems wurde in der DE 36 02 932 A1 ein kombinierter Antrieb von Mahlteller und Mahlrollen offenbart. Auf diese Weise kann die gesamte Antriebsleistung der Rollenmühle auf mehrere Antriebe verteilt werden. Dabei ist es insbesondere auch denkbar, dass die Antriebe so ausgelegt werden, dass eine Rollenmühle mit n Antrieben auch mit n-1 Antrieben betrieben werden kann, sodass die Reparatur eine Antriebes ohne Stillstand der gesamten Rollenmühle durchgeführt werden kann. Der Antriebsmotor des Mahltellers kann beispielsweise neben dem Mahlteller angeordnet werden, wodurch jedoch eine Kegelradstufe erforderlich wird, die wiederum die häufigste Schadensstelle in heutigen Rollenmühlengetrieben darstellt. Alternativ wird in der DE 36 02 932 A1 vorgeschlagen, den Motor unterhalb des Mahltellers anzuordnen. Diese Bauweise führt bei industriell üblichen Größen zu einer Erhöhung der gesamten Mühle und der mit dieser verbundenen äußeren Materialtransporte, Gasleitungen sowie der dafür notwendigen gebäudetechnischen Lastenabtragungen.Instead of a large grinding table drive system was in the DE 36 02 932 A1 discloses a combined drive of grinding and grinding rolls. In this way, the entire drive power of the roller mill can be distributed to multiple drives. It is also conceivable that the drives are designed so that a roller mill with n drives can also be operated with n-1 drives, so that the repair of a drive can be performed without stopping the entire roller mill. The drive motor of the grinding table can for example be arranged next to the grinding table, whereby, however, a bevel gear stage is required, which in turn represents the most common point of damage in today's roller mill gears. Alternatively, in the DE 36 02 932 A1 proposed to arrange the motor below the grinding table. With industrially customary sizes, this construction method leads to an increase in the entire mill and the associated external material transports, gas lines and the required building-related load transfer.

In der DE 10 2005 045 406 B4 wird die Verwendung eines elektromotorischen Direktantriebs als Antrieb einer kontinuierlichen Presse beschrieben, der jedoch als Antriebsmotor für Rollenmühlen nicht geeignet ist.In the DE 10 2005 045 406 B4 the use of an electric direct drive is described as driving a continuous press, which is not suitable as a drive motor for roller mills.

Weiterhin ist aus der DE 103 05 915 A1 eine Wälzmühle bekannt, dessen Mahlschüssel durch einen Ringmotor angetrieben wird.Furthermore, from the DE 103 05 915 A1 a roller mill known, the grinding bowl is driven by a ring motor.

Eine Rollenmühle nach dem Oberbegriff des Anspruchs 1 ist aus der DE 10 2006 043 179 A1 bekannt.A roller mill according to the preamble of claim 1 is known from DE 10 2006 043 179 A1 known.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Rollenmühle anzugeben, deren Mahltellerantriebssystem sich durch eine verringerte Störanfälligkeit und eine möglichst platzsparende Anordnung des Mahltellerantriebes auszeichnet.The invention is therefore based on the object to provide a roller mill, the Mahltellerantriebssystem is characterized by a reduced susceptibility and a space-saving arrangement of Mahltellerantriebes as possible.

Erfindungsgemäß wird diese Aufgabe durch die Merkmale des Anspruches 1 gelöst.According to the invention, this object is solved by the features of claim 1.

Die erfindungsgemäße Rollenmühle besteht im Wesentlichen aus wenigstens einer Mahlrolle und einem Mahlteller, wobei der Mahlteller einen nach unten offenen Mahltellerinnenraum aufweist, wenigstens einem Mahlrollenantriebssystem zum Antreiben der Mahlrolle sowie einem Mahltellerantriebssystem zum Antreiben des Mahltellers. Das Mahltellerantriebssystem weist darüber hinaus einen getriebelosen Direktantrieb auf, der im Mahltellerinnenraum angeordnet ist und 15% bis 30% der gesamten installierten Antriebsleistung der Rollenmühle aufweist.The roller mill according to the invention consists essentially of at least one grinding roller and a grinding table, wherein the grinding table has a downwardly open Mahltellerinnenraum, at least one Mahlrollenantriebssystem for driving the grinding roller and a Mahltellerantriebssystem for driving the Mahltellers. The Mahltellerantriebssystem also has a gearless direct drive, which is arranged in the Mahltellerinnenraum and 15% to 30% of the total installed drive power of the roller mill has.

Zur Unterbringung des getriebelosen Direktantriebs ist der untere Teil des Mahltellers glocken- oder zylinderförmig ausgebildet, wobei der getriebelose Direktantrieb im Inneren des glocken- oder zylinderförmig ausgebildeten, unteren Teil des Mahltellers angeordnet ist.To accommodate the gearless direct drive, the lower part of the grinding plate is bell-shaped or cylindrical, wherein the gearless direct drive is arranged in the interior of the bell-shaped or cylindrical, lower part of the grinding table.

Die geringere Störanfälligkeit der erfindungsgemäßen Rollenmühle wird zum einen dadurch erreicht, dass die gesamte Antriebsleistung aufgeteilt wird, in dem einerseits die Mahlrollen und andererseits der Mahlteller separat angetrieben werden. Des Weiteren kann durch einen getriebelosen Direktantrieb auf das ansonsten übliche und störanfällige Getriebe für den Mahltellerantrieb verzichtet werden.The lower susceptibility to interference of the roller mill according to the invention is achieved on the one hand, that the entire drive power is divided, in which on the one hand, the grinding rollers and on the other hand, the grinding plates are driven separately. Furthermore, can be dispensed with by a gearless direct drive on the otherwise common and error-prone transmission for Mahltellerantrieb.

Dadurch das neben dem Mahltellerantriebsystem auch ein Mahlrollenantriebssystem vorgesehen ist, können die einzelnen Antriebe entsprechend kleiner dimensioniert werden, sodass überhaupt erst eine Anordnung des getriebelosen Direktantriebs im Mahltellerinnenraum und damit eine äußerst platzsparende Anordnung ermöglicht wird.As a result, in addition to the Mahltellerantriebsystem a Mahlrollenantriebssystem is provided, the individual drives can be dimensioned correspondingly smaller, so that in the first place an arrangement of gearless direct drive in Mahltellerinnenraum and thus an extremely space-saving arrangement is possible.

Aus der DE 197 02 854 A1 ist weiterhin eine Rollenmühle bekannt, deren Mahlrollen mit jeweils einem unabhängigen Einzelantrieb angetrieben werden. Darüber hinaus ist zum Anfahren der Rollenmühle ein Hilfsantrieb im Mahlteller integriert, der jedoch nur eine Leistung von ca. 2-5% der gesamten installierten Leistung der Rollenmühle aufweist. Ein solcher Hilfsantrieb ist darüber hinaus nicht für den Dauerbetrieb ausgelegt und benötigt eine entsprechende Untersetzung, die hier durch ein sich an einem Innenzahnrad abwälzenden Ritzel oder durch ein Reibrad erzielt wird.From the DE 197 02 854 A1 Furthermore, a roller mill is known, the grinding rollers are driven, each with an independent single drive. In addition, an auxiliary drive in the grinding table is integrated to start the roller mill, but only has a capacity of about 2-5% of the total installed capacity of the roller mill. Such an auxiliary drive is also not designed for continuous operation and requires a corresponding reduction, which is achieved here by a rolling on an internal gear pinion or by a friction wheel.

Erfindungsgemäß ist jedoch kein Hilfsantrieb, sondern ein für den Dauerbetrieb ausgelegtes Mahltellerantriebssystem zum Antreiben des Mahltellers vorgesehen.According to the invention, however, no auxiliary drive, but a designed for continuous operation Mahltellerantriebssystem is provided for driving the Mahltellers.

Weitere Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Further embodiments of the invention are the subject of the dependent claims.

Gemäß einer weiteren Ausgestaltung der Erfindung weist der getriebelose Direktantrieb einen Rotor auf, der über die Mahltellerlagerung des Mahltellers gelagert ist. Hierzu ist er drehfest mit dem Mahlteller verbunden, insbesondere drehfest am Mahlteller anflanscht. Dabei ist die Mahltellerlagerung zweckmäßigerweise auf einer Grundplatte der Rollenmühle angeordnet.According to a further embodiment of the invention, the gearless direct drive on a rotor which is mounted on the Mahltellerlagerung of the grinding table. For this purpose, it is rotatably connected to the grinding table, in particular rotatably flanged to the grinding table. The grinding table storage is expediently arranged on a base plate of the roller mill.

Gemäß einer weiteren Ausgestaltung weist der getriebelose Direktantrieb einen Stator auf, der sich auf der Grundplatte abstützt.According to a further embodiment, the gearless direct drive on a stator which is supported on the base plate.

Als getriebeloser Direktantrieb kommen beispielsweise ein Transversalflussmotor oder ein Hochmomentenmotor mit einem inneren Stator und einem äußeren Rotor in Betracht. Der Hochmomentenmotor kann dabei vorteilhafterweise einen Rotor mit Permanentenmagneten aufweisen.As a gearless direct drive, for example, a transverse flux motor or a high-torque motor with an inner stator and an outer rotor come into consideration. The high-torque motor can advantageously have a rotor with permanent magnet.

Weiterhin steht der getriebelose Direktantrieb mit einer Regeleinrichtung zur Regelung des Dircktantriebes auf ein vorgegebenes Antriebsmoment in Verbindung. Der Direktantrieb kann dabei insbesondere auf einen vorgegebenen Anteil der aufgenommenen Gesamtleistung der Rollenmühle geregelt werden.Furthermore, the gearless direct drive is connected to a control device for controlling the Dircktantriebes to a predetermined drive torque in combination. The direct drive can be regulated in particular to a predetermined proportion of the recorded total power of the roller mill.

Gemäß einer weiteren Ausgestaltung der Erfindung ist eine Regeleinrichtung für das Mahlrollenantriebssystem vorgesehen, die beispielsweise als Leistungsausgleichregelung ausgelegt ist und darüber hinaus auch mit dem getriebelosen Direktantrieb in Verbindung steht und diesen auf einen vorgegebenen Anteil der aufgenommenen Gesamtleistung der Rollenmühle regelt. Die Ansteuerung des Direktantriebs erfolgt zweckmäßigerweise über einen Frequenzumrichter. Außerdem kommt vorteilhafterweise ein getriebelose Direktantrieb zur Anwendung, der direkt an das Stromnetz angeschlossen werden kann. Alternativ kann auch ein drehzahlgeregelter Gleichstrommotor Verwendung finden.According to a further embodiment of the invention, a control device for the Mahlrollenantriebssystem is provided, which is designed for example as power compensation and beyond also with the gearless direct drive is in communication and regulates this to a predetermined proportion of the recorded total power of the roller mill. The activation of the direct drive is expediently carried out via a frequency converter. In addition, advantageously a gearless direct drive is used, which can be connected directly to the mains. Alternatively, a speed-controlled DC motor can be used.

Bei den der Erfindung zugrundeliegenden Versuchen hat sich gezeigt, dass mit einer Auslegung des getriebelosen Direktantriebs von 15-30% der gesamten installierten Antriebsleistung der Rollenmühle und einer geeigneten Regelung, wie diese beispielsweise in der DE 10 2008 036 784 A1 beschrieben ist, ein äußerst stabiler und ausgeglichener Mahlbetrieb gewährleistet werden kann.In the experiments underlying the invention has been shown that with a design of the gearless direct drive of 15-30% of the total installed drive power of the roller mill and a suitable scheme, such as this in the DE 10 2008 036 784 A1 is described, a very stable and balanced grinding operation can be guaranteed.

Weitere Vorteile und Ausgestaltungen der Erfindung werden im Folgenden anhand der Beschreibung und der Zeichnung näher erläutert.Further advantages and embodiments of the invention will be explained in more detail below with reference to the description and the drawing.

Die Zeichnung zeigt eine schematischen, teilweise geschnittene Seitenansicht einer Rollenmühle.The drawing shows a schematic, partially sectioned side view of a roller mill.

Die in der Zeichnung dargestellte Rollenmühle besteht im Wesentlichen aus wenigstens einer Mahlrolle 1, einem Mahlteller 2, einem Mahlrollenantriebssystem 3 zum Antreiben der Mahlrolle 1 und einem Mahltellerantriebssystem zum Antreiben des Mahltellers 2, das einen getriebelosen Direktantrieb 4 aufweist.The roller mill shown in the drawing consists essentially of at least one grinding roller 1, a grinding table 2, a Mahlrollenantriebssystem 3 for driving the grinding roller 1 and a Mahltellerantriebssystem for driving the Mahltellers 2, which has a gearless direct drive 4.

Auf der Oberseite des Mahltellers 2 ist eine Mahlbahn 2a ausgebildet, wobei zu zerkleinerndes Gut 5 im Spalt zwischen Mahlbahn 2a und Mahlrolle 1 zerkleinert wird. Während des Betriebes rotiert der Mahlteller 2 um seine zentrale, vertikale Achse 6, wobei die Mahlrollen 1 auf der Mahlbahn 2 bzw. auf dem dazwischen befindlichen, zu zerkleinernden Gut 5 ab, wobei die Mahlrolle 1 über ein Anpresssystem 7 gegen den Mahlteller 2 gedrückt wird.On the upper side of the grinding plate 2, a grinding path 2a is formed, wherein comminuted Good 5 is comminuted in the gap between the grinding path 2a and grinding roller 1. During operation, the grinding table 2 rotates about its central, vertical axis 6, wherein the grinding rollers 1 on the grinding path 2 or on the intervening, to be comminuted Good 5, wherein the grinding roller 1 is pressed by a pressing system 7 against the grinding table 2 ,

Der Mahlteller 2 weist einen Mahltellerinnenraum 2b auf, der beispielsweise dadurch gebildet wird, dass der untere Teil des Mahltellers 2 glocken- oder zylinderförmig ausgebildet ist, sodass der getriebelose Direktantrieb 4 im Mahltellerinnenraum 2b, bzw. im Inneren des glocken- oder zylinderförmig ausgebildeten, unteren Teils des Mahltellers 2 angeordnet werden kann.The grinding table 2 has a Mahltellerinnenraum 2b, which is formed for example by the fact that the lower part of the grinding plate 2 is bell-shaped or cylindrical, so that the gearless direct drive 4 in Mahltellerinnenraum 2b, or in the interior of the bell-shaped or cylindrical, lower Part of the grinding plate 2 can be arranged.

Der Mahlteller 2 stützt sich über eine Mahltellerlagerung 8 auf einer Grundplatte 9 ab, wobei geeignete Lager 8a und 8b vorgesehen sind.The grinding table 2 is supported on a base plate 9 via a grinding table bearing 8, suitable bearings 8a and 8b being provided.

Der getriebelose Direktantrieb 4 weist einen äußeren Rotor 4a und einen inneren Stator 4b auf, wobei der Rotor 4a am Mahlteller 2 angeflanscht ist (siehe Positionen 10, 11).The gearless direct drive 4 has an outer rotor 4a and an inner stator 4b, wherein the rotor 4a is flanged on the grinding table 2 (see positions 10, 11).

Auf diese Weise kann der Direktantrieb 4 äußerst platzsparend im Inneren des Mahltellers 2 angeordnet werden. Durch die spezielle Anbindung des Rotors 4a und des Stators 4b benötigt der Rotor 4a keine eigene Lagerung, sondern wird über die ohnehin vorhandene Mahltellerlagerung 8 gelagert. Auf diese Weise wird der Bauraum optimal ausgenutzt, indem nicht zwingend benötigte Maschineelemente (Rotorlager) weggelassen bzw. durch bereits vorhandene Maschinenelemente (Mahltellerlagerung 8) genutzt werden. Hierzu zählt auch die Direktanbindung des Stators 4b an die Grundplatte und der Verzicht auf Kupplungen. Vorteilhafterweise kann der Direktmotor 4 bereits in der Werkstatt an der Grundplatte 9 montiert werden, sodass einerseits eine hohe Genauigkeit und andererseits eine einfache und schnelle Endmontage auf der Baustellte erfolgen kann.In this way, the direct drive 4 can be arranged extremely space-saving inside the grinding table 2. Due to the special connection of the rotor 4a and the stator 4b, the rotor 4a does not require its own storage but is supported by the already existing grinding table bearing 8. In this way, the space is optimally utilized by not necessarily required machine elements (rotor bearing) omitted or be used by existing machine elements (grinding table storage 8). This also includes the direct connection of the stator 4b to the base plate and the absence of couplings. Advantageously, the direct motor 4 can already be mounted in the workshop on the base plate 9, so that on the one hand a high accuracy and on the other hand a simple and fast final assembly can be done on the site.

Der getriebelose Direktmotor 4 kann beispielsweise durch einen Transversalflussmotor oder einen Hochmomentenmotor gebildet werden, wobei der Rotor des Hochmomentenmotor mit Permanentmagneten versehen ist.The gearless direct motor 4 can be formed for example by a Transversalflussmotor or a high-torque motor, wherein the rotor of the high-torque motor is provided with permanent magnets.

Im Vergleich zur Netzfrequenz werden relativ niedrige Drehzahlen des Mahltellers benötigt, sodass ein Direktantrieb mit hoher Polzahl notwendig ist. Die daraus resultierende niedrige Drehzahl des Direktantriebs hat bei Asynchronmaschinen zudem den Vorteil, dass Drehzahlschwankungen, die durch Lastschwankungen aus dem Mahlprozess ausgelöst werden, nicht stark überhöht in das Torsionsschwingungssystem zurückgespeist (reflektiert) werden. Der Verzicht auf ein zusätzliches Getriebe hat zudem den weiteren Vorteil, dass Spiele im Getriebe entfallen und dadurch die Störanfälligkeit des Antriebes deutlich verringert wird.In comparison to the mains frequency relatively low speeds of the grinding table are needed, so that a direct drive with a high number of poles is necessary. The resulting low speed of the direct drive also has the advantage in asynchronous machines that speed fluctuations that are triggered by load fluctuations from the grinding process, are not fed back greatly (reflected) in the torsional vibration system. The absence of an additional transmission also has the further advantage that eliminates games in the transmission and thus the susceptibility of the drive is significantly reduced.

Die Regelung des Mahlrollenantriebssystems 3 und des Direktantriebes 4 erfolgt über eine Regeleinrichtung 12. Durch das Vorsehen von ein bzw. mehreren Mahlrollenantriebssystemen 3 und dem Direktantrieb 4 für den Mahlteller wird die gesamte installierte Antriebsleistung der Rollenmühle auf mehrere Antriebe verteilt. Bei den der Erfindung zugrundeliegenden Versuchen hat es sich als besonders vorteilhaft erwiesen, dass der Direktantrieb 15 - 30% der gesamten installierten Antriebsleistung aufweist.The control of Mahlrollenantriebssystems 3 and the direct drive 4 via a control device 12. By providing one or more Mahlrollenantriebssystemen 3 and the direct drive 4 for the grinding table, the entire installed drive power of the roller mill is distributed to multiple drives. In the experiments on which the invention is based, it has proven to be particularly advantageous that the direct drive has 15-30% of the total installed drive power.

Die Regeleinrichtung 12 ist dabei so ausgelegt, dass sie den getriebelosen Direktantrieb 4 auf seinen vorgegebenen Anteil der aufgenommenen Gesamtleistung der Rollenmühle regelt. Zudem kann er auch auf ein vorgegebenes Antriebsmoment geregelt werden. Die Ansteuerung des Direktantriebes 4 erfolgt beispielsweise über einen nicht näher dargestellten Frequenzumrichter.The control device 12 is designed so that it controls the gearless direct drive 4 to its predetermined proportion of the recorded total power of the roller mill. In addition, it can also be regulated to a predetermined drive torque. The control of the direct drive 4 takes place for example via a frequency converter, not shown.

Die Anordnung des Direktantriebs im Inneren des Mahltellers ermöglicht eine äußerst platzsparende Anordnung, wobei der Wegfall des Getriebes eine deutlich verringerte Störanfälligkeit gewährleistet. Durch die oben beschriebene, spezielle Anbindung des Direktantriebs 4 wird zusätzlicher Bauraum sowie Kosten eingespart.The arrangement of the direct drive inside the grinding plate allows a very space-saving arrangement, the elimination of the transmission ensures a significantly reduced susceptibility to interference. By the above-described, special connection of the direct drive 4 additional space and cost is saved.

Claims (12)

  1. Roller mill having
    a. at least one grinding roller (1),
    b. a grinding table (2), the grinding table having a grinding table inner space which is open in a downward direction,
    c. at least one grinding roller drive system (3) for driving the grinding roller (1) and
    d. a grinding table drive system for driving the grinding table, in order that the total installed drive power of the roller mill is divided over a number of drives,
    wherein the grinding table drive system has a gearless direct drive (4) which is arranged in the grinding table inner space (2b) and the lower portion of the grinding table (2) is constructed in a bell-like or cylinder-like manner, and the gearless direct drive (4) is arranged inside the bell-like or cylinder-like lower portion of the grinding table.
    characterised in that the direct drive (4) has from 15% to 30% of the total installed drive power of the roller mill
  2. Roller mill according to claim 1, characterised in that the grinding table (2) has a grinding table support (8) and the gearless direct drive (4) has a rotor (4a) which is supported via the grinding table support (8).
  3. Roller mill according to one or more of the preceding claims, characterised in that the grinding table support (8) is arranged on a base plate (9) of the roller mill and the gearless direct drive (4) has a stator (4b) which is supported on the base plate (9).
  4. Roller mill according to one or more of the preceding claims, characterised in that the gearless direct drive (4) has a rotor (4a) which is connected to the grinding table (2) in a rotationally secure manner.
  5. Roller mill according to one or more of the preceding claims, characterised in that the gearless direct drive (4) is formed by a transverse flux motor.
  6. Roller mill according to one or more of the preceding claims, characterised in that the gearless direct drive (4) is formed by a high torque motor having an inner stator and an outer rotor.
  7. Roller mill according to claim 6, the high torque motor having a rotor (4a) with permanent magnets.
  8. Roller mill according to one or more of the preceding claims, characterised in that the gearless direct drive (4) is connected to an adjustment device (12) for adjusting the direct drive (4) to a predetermined drive torque.
  9. Roller mill according to one or more of the preceding claims, characterised in that the gearless direct drive (4) is connected to an adjustment device (12) which adjusts the direct drive to a predetermined proportion of the total power input of the roller mill.
  10. Roller mill according to one or more of the preceding claims, characterised in that there is provided for the grinding roller drive system (3) an adjustment device (12) which is also connected to the gearless direct drive (4) and which adjusts it to a predetermined proportion of the total power input of the roller mill.
  11. Roller mill according to one or more of the preceding claims, characterised in that the gearless direct drive (4) is connected to a frequency converter for the control thereof.
  12. Roller mill according to one or more of the preceding claims, characterised in that the gearless direct drive (4) is directly connected to an electrical power supply network.
EP10709462.5A 2009-03-09 2010-03-04 Roller mill Active EP2242583B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009012353A DE102009012353C5 (en) 2009-03-09 2009-03-09 roller mill
PCT/EP2010/052774 WO2010102946A1 (en) 2009-03-09 2010-03-04 Roller mill

Publications (3)

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EP2242583A1 EP2242583A1 (en) 2010-10-27
EP2242583B1 EP2242583B1 (en) 2011-05-25
EP2242583B2 true EP2242583B2 (en) 2014-06-25

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US (1) US8651405B2 (en)
EP (1) EP2242583B2 (en)
JP (1) JP5647156B2 (en)
CN (1) CN102215973B (en)
AT (1) ATE510625T1 (en)
BR (1) BRPI1004938A8 (en)
DE (1) DE102009012353C5 (en)
DK (1) DK2242583T4 (en)
MX (1) MX2011005283A (en)
RU (1) RU2520639C2 (en)
WO (1) WO2010102946A1 (en)

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CN107321446A (en) * 2017-08-08 2017-11-07 江苏鹏飞集团股份有限公司 The vertical pulverizer lapping device of twin-stage grinding

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Publication number Publication date
BRPI1004938A8 (en) 2017-12-05
US8651405B2 (en) 2014-02-18
DE102009012353A1 (en) 2010-09-23
BRPI1004938A2 (en) 2016-04-26
ATE510625T1 (en) 2011-06-15
JP2012519589A (en) 2012-08-30
CN102215973B (en) 2014-05-07
US20110240779A1 (en) 2011-10-06
WO2010102946A1 (en) 2010-09-16
DK2242583T4 (en) 2014-09-29
EP2242583A1 (en) 2010-10-27
MX2011005283A (en) 2011-06-01
EP2242583B1 (en) 2011-05-25
RU2011119492A (en) 2013-04-20
DE102009012353C5 (en) 2013-08-22
DK2242583T3 (en) 2011-09-12
JP5647156B2 (en) 2014-12-24
CN102215973A (en) 2011-10-12
RU2520639C2 (en) 2014-06-27
DE102009012353B4 (en) 2011-03-17

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