EP2252403B1 - Roller grinding mill - Google Patents
Roller grinding mill Download PDFInfo
- Publication number
- EP2252403B1 EP2252403B1 EP09722364.8A EP09722364A EP2252403B1 EP 2252403 B1 EP2252403 B1 EP 2252403B1 EP 09722364 A EP09722364 A EP 09722364A EP 2252403 B1 EP2252403 B1 EP 2252403B1
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- European Patent Office
- Prior art keywords
- grinding
- roller
- drives
- drive
- radial force
- Prior art date
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- 238000000227 grinding Methods 0.000 title claims description 130
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000004568 cement Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000009849 deactivation Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 235000012054 meals Nutrition 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000001354 calcination Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Images
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
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C15/04—Mills with pressed pendularly-mounted rollers, e.g. spring pressed
-
- 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
-
- 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 roller mills according to the preamble of claim 1.
- Roller mills have been known for over a hundred years and are in use worldwide. They are available in a wide variety of constructions. For example, shows the DE 153 958 C from the year 1902 a cone mill with a revolving meal plate, on which eight grinding cones rest under spring pressure.
- Modern mills use grinding rolls that have large weights and diameters to produce a large grinding performance. Compare DE 198 26 324 C . DE 196 03 655 A or EP 0 406 644 B , This Wälzmühlentyp has largely enforced in practice, because it has significant advantages in terms of design, control technology and energy management.
- the main applications of modern rolling mills are the cement industry and coal-fired power plants.
- roller mills are used both for the production of cement raw meal and for clinker milling and coal milling.
- the kiln exhaust gases from the heat exchanger and the clinker mill can be used to dry the millbase and to pneumatically transport the ground material.
- the roller mills serve to finely grind the coal and, with the aid of the classifying air, to feed directly into the boiler, if possible without the use of an intermediate bunker.
- suitable drive is understood to mean the drive whose deactivation results in only a minimal resulting radial force.
- the grinding table is equipped with a ring gear, act on the drives.
- the deactivation of a drive can be done in the simplest case, that the drive power, such as the electric power is turned off, so that gear and motor idle.
- the drives on carriages or rails are mobile.
- the radial force component remaining in deactivating a drive and a grinding roll can be further reduced if the angle between the grinding rolls and the drives is changed.
- the angular positions of the drives are adjustable around the center of the mill.
- a further embodiment of the invention provides for compensating the radial force component arising in the event of failure of a grinding roller or a drive in that the remaining grinding rollers themselves generate a counterforce component.
- a roller mill which can be equipped with a different number of grinding rollers (two, three or four).
- the grinding rollers run on a grinding table, which is driven by means of a drive device, and can be swung out of the mill housing as needed.
- each grinding roller is driven by its own drive, consisting of electric motor and reduction gear.
- the grinding table itself has no drive.
- a deactivation of one or more grinding rollers or one or more drives is not provided.
- the present invention has for its object to provide roller mills with at least two grinding rollers and at least two drives in which on the radial bearing of the grinding plate only small, the radial bearing not overloading forces arise when a single grinding roller is deactivated.
- a development of the invention provides that the number of drives is equal to the number of grinding rollers.
- a particularly cost-effective embodiment of the invention provides that the grinding rollers with the rocking levers and the drives are modular prefabricated. Depending on the wishes of the mill operator, more or fewer roll modules or drive modules are used. This allows mill components such as grinding rollers, rocker arms, motors and gears to be mass-produced and stockpiled for repairs.
- the invention further provides a method for operating a roller mill, which makes it possible to compensate for the resulting in case of failure of a grinding roller radial force component, so that an overload of the grinding table storage is avoided.
- a further reduction of the resulting radial force component is achieved when the angular position of at least one of the remaining drives is changed such that the resulting radial force becomes minimal.
- An additional way to further reduce the radial force is to limit the remaining grinding rolls, so that the resulting radial force is minimal.
- Fig. 1 shows the top view of a roller mill with a rotating grinding table 1, roll on the grinding path six grinding rollers M.
- the grinding table 1 is held by a thrust bearing and a radial bearing 3.
- Each grinding roller M is mounted by means of rocking lever 4 on an external console 5, so that each grinding roller M can be lifted individually from the grinding path and swung out of the mill. This makes maintenance or repair of a grinding roller possible during the current grinding operation.
- Fig. 2a shows purely schematically the mill of Fig. 1 ,
- the grinding table is driven by the six drives A distributed around the circumference. As all radial forces cancel each other out in this symmetrical arrangement, the resulting radial force R equals zero.
- Fig. 2b shows the mill of Fig. 2a , but with a grinding roller M is swung out. It turns a resulting radial force component of size R1.
- Fig. 2c shows the situation when in addition to the grinding roller M, the adjacent "matching" drive A has been deactivated.
- the resulting radial force component has decreased to R2 ⁇ R1.
- Fig. 2d shows the situation, if in addition to the measure Fig. 2c the angular position of the indicated by an arrow drive is changed.
- the radial force R3 has almost returned to zero.
- Fig. 3b shows the situation when one of the grinding rollers M has been swung out. The result is a resulting radial force component R1.
- Fig. 3c shows the situation when in addition to the grinding roller M, the adjacent "matching" drive A has been deactivated. As a result, the resulting radial force component has been reduced to R2 ⁇ R1.
- Fig. 3d shows the situation, if in addition to the measure Fig. 3c the angular position of the indicated by an arrow drive is changed.
- the radial force R3 has almost returned to zero.
- Fig. 4b shows the situation when one of the grinding rollers M has been swung out. The result is a resulting radial force component of size R1.
- Fig. 4c shows the situation when in addition to the grinding roller M and the adjacent drive A has been deactivated. The resulting radial force component has been reduced to R2 ⁇ R1.
- Fig. 4d shows the situation, if in addition to the measure Fig. 4c the angular position of the indicated by an arrow drive is changed.
- the radial force R3 has almost returned to zero.
- Fig. 5b shows the situation when one of the grinding rollers M has been swung out. The result is a resulting radial force component of size R1.
- Fig. 5c shows the situation when in addition to the grinding roller M and the adjacent drive A has been deactivated. As a result, the resulting radial force component has been reduced to R2 ⁇ R1.
- Fig. 5d shows the situation, if in addition to the measure Fig. 5c the angular position of the indicated by an arrow drive is changed.
- the radial force R3 has almost returned to zero.
- Fig. 2a to 5d show that the invention is applicable to all Wälzmühlen, regardless of the number of grinding rollers, when the grinding table is rotated by a corresponding number of drives in rotation.
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Description
Die Erfindung betrifft Wälzmühlen gemäß dem Oberbegriff des Anspruchs 1.The invention relates to roller mills according to the preamble of
Wälzmühlen sind seit über einhundert Jahren bekannt und weltweit im Einsatz. Es gibt sie in den unterschiedlichsten Konstruktionen. So zeigt beispielsweise die
Moderne Mühlen verwenden Mahlwalzen, die zur Erzeugung einer großen Mahlleistung große Gewichte und Durchmesser besitzen. Man vergleiche
Moderne Großmühlen benötigen Antriebsleistungen bis zu 10 MW. Es versteht sich, dass die zugehörigen Lager und Antriebe, insbesondere die Getriebe, einer besonderen Konstruktion bedürfen. Besonders belastet sind die Verzahnung, die Wellenlagerung, das integrierte Axial-Drucklager und seine Unterstützung innerhalb des Getriebegehäuses. Bei Antriebsleistungen bis 6 MW haben sich die Kegelrad-Planetengetriebe als Stand der Technik durchgesetzt, die aufgrund ihrer kreisrunden Bauform an den kreisrunden Mahlteller angepasst sind und die statischen und dynamischen Mahlkräfte in das Fundament leiten. Man vergleiche
Diese an sich platzsparende Konstruktion des Antriebs hat jedoch wesentliche Nachteile. Sobald an nur einer Komponente ein Problem auftritt, muss der gesamte Antrieb ausgebaut werden. Dabei hat es sich als besonders nachteilig herausgestellt, dass es sehr schwierig ist, die Räder des Planetengetriebes einer Sichtkontrolle zu unterziehen; dies ist oft erst nach Ausbau des kompletten Antriebs möglich. Da diese Antriebe Sonderkonstruktionen sind, dauert eine Ersatzbeschaffung entsprechend lange, d. h. Wochen oder Monate, da eine Ersatzteilbevorratung wegen der Sonderkonstruktion als zu kostenintensiv gilt. Das ist unbefriedigend.However, this space-saving design of the drive has significant disadvantages. As soon as a problem occurs on just one component, the entire drive must be removed. It has been found to be particularly disadvantageous that it is very difficult to subject the wheels of the planetary gear to a visual inspection; This is often only possible after removing the complete drive. Since these drives are special constructions, a replacement procurement takes a correspondingly long time, ie. H. Weeks or months, as a spare parts store is considered to be too expensive due to the special construction. That is unsatisfactory.
Ein weiterer Nachteil der bekannten Antriebskonstruktionen ist der sogenannte Wartungs-Antrieb, der während bestimmter Wartungs- und Reparaturarbeiten den Mahlteller dreht, jedoch nur so lange funktioniert, wie das Hauptgetriebe selbst funktioniert.Another disadvantage of the known drive designs is the so-called maintenance drive, which rotates the grinding table during certain maintenance and repair work, but only works as long as the main transmission itself works.
Selbstverständlich hat es nicht an Vorschlägen gefehlt, wie diese Unzulänglichkeiten und Nachteile beseitigt werden könnten. So zeigt die
Aus der
Mehrmotor-Antriebskonzepte konnten sich trotz theoretischer Vorteile bisher in der Praxis nicht durchsetzen. Bei Hydraulikantrieben ist nachteilig der im Vergleich zu Elektroantrieben niedrigere Wirkungsgrad sowie die geringere Verfügbarkeit und Lebensdauer der Hydraulikkomponenten. Das zuvor beschriebene Zwei-Antriebe-Konzept mit Elektromotoren und Untersetzungsgetriebe konnte sich nicht durchsetzen, weil sich im Betrieb erhebliche Drehmomentüberhöhungen ausbilden, die eine Überlastung des Getriebes bis hin zur Zerstörung zur Folge haben können. Außerdem war es nicht möglich, beim Ausfall eines Antriebs den Mühlenbetrieb mit der erforderlichen Kapazität aufrecht zu erhalten.Despite the theoretical advantages, multi-engine drive concepts have not been successful in practice so far. In hydraulic drives is disadvantageous compared to electric drives lower efficiency and the lower availability and service life of the hydraulic components. The previously described two-drive concept with electric motors and reduction gear could not prevail, because in operation considerable torque increases, which can have an overload of the transmission to destruction result. In addition, it was not possible to maintain the mill operation with the required capacity in case of failure of a drive.
Mit zunehmender Kapazität der Wälzmühlen hat jedoch nicht nur die benötigte Antriebsleistung sondern auch die Zahl der auf dem Mahlteller abrollenden Mahlwalzen deaktiviert wird. Unter dem Begriff "passender Antrieb" wird der Antrieb verstanden, bei dessen Deaktivierung nur eine minimale resultierende Radialkraft entsteht.However, with increasing capacity of the roller mills, not only does the required drive power have but also the number of grinding rollers rolling on the grinding table is deactivated. The term "suitable drive" is understood to mean the drive whose deactivation results in only a minimal resulting radial force.
Es versteht sich, dass derselbe positive Effekt auch dann erreicht wird, wenn bei Ausfall eines Antriebs die dazu passende Mahlwalze deaktiviert wird.It is understood that the same positive effect is achieved even if the matching grinding roller is deactivated in the event of failure of a drive.
Wenn eine Mahlwalze ausfällt und daraufhin der entsprechende Antrieb herausgenommen wird, würde normalerweise die Mahlleistung entsprechend sinken. Nun ist aber bekannt, dass durch Erhöhen der Anpresskraft und Vermehrung der Sichtluft die Mahlleistung erhöht werden kann. Dadurch würde jedoch der Kompensationseffekt, der durch die Herausnahme des Antriebs erreicht wurde, wieder zunichte gemacht. Die Lösung des Problems besteht darin, mit der Erhöhung der Anpresskraft der Mahlwalzen auch die Antriebskraft der verbleibenden Antriebe zu erhöhen, um die nötige Durchsatzleistung zu erhalten.If a grinding roller fails and then the corresponding drive is removed, normally the grinding performance would decrease accordingly. However, it is now known that by increasing the contact pressure and increasing the classifying air, the grinding capacity can be increased. However, this would nullify the compensation effect achieved by removing the drive. The solution to the problem is to increase the driving force of the remaining drives with the increase of the pressing force of the grinding rollers in order to obtain the necessary throughput.
Gemäß einer Ausgestaltung der Erfindung ist der Mahlteller mit einem Zahnkranz ausgerüstet, auf den die Antriebe wirken.According to one embodiment of the invention, the grinding table is equipped with a ring gear, act on the drives.
Um die Mahlwalzen einzeln von der Mahlbahn abheben und aus der Mühle herausschwenken zu können, sind sie mittels Schwinghebeln auf Konsolen gelagert, die neben dem Mühlengehäuse stehen.In order to lift the grinding rollers individually from the grinding track and to be able to swing out of the mill, they are mounted by means of rocking levers on consoles, which stand next to the mill housing.
Das Deaktivieren eines Antriebs kann im einfachsten Fall dadurch geschehen, dass die Antriebsenergie, beispielsweise der elektrische Strom, abgeschaltet wird, so dass Getriebe und Motor leer mitlaufen.The deactivation of a drive can be done in the simplest case, that the drive power, such as the electric power is turned off, so that gear and motor idle.
Vorteilhafter ist es jedoch, wenn der Antrieb vom Mahlteller entkoppelt wird. Gemäß einer Ausgestaltung hierzu sind die Antriebe auf Lafetten oder Schienen fahrbar.It is more advantageous, however, if the drive is decoupled from the grinding table. According to one embodiment, the drives on carriages or rails are mobile.
Überraschenderweise hat sich herausgestellt, dass die beim Deaktivieren eines Antriebs und einer Mahlwalze verbleibende Radialkraftkomponente noch weiter reduziert werden kann, wenn der Winkel zwischen den Mahlwalzen und den Antrieben verändert wird. Zu diesem Zweck sind die Winkelpositionen der Antriebe um das Zentrum der Mühle verstellbar.Surprisingly, it has been found that the radial force component remaining in deactivating a drive and a grinding roll can be further reduced if the angle between the grinding rolls and the drives is changed. For this purpose, the angular positions of the drives are adjustable around the center of the mill.
Eine weitere Ausgestaltung der Erfindung sieht vor, die bei Ausfall einer Mahlwalze oder eines Antriebs entstehende Radialkraftkomponente dadurch zu kompensieren, dass die verbleibenden Mahlwalzen selbst eine Gegenkraftkomponente erzeugen. Zu diesem zugenommen. So beschreibt die
Eine Wälzmühle mit sechs Mahlwalzen ist auch bereits beschrieben in der DE-Offenlegungsschrift
Aus der
Schließlich ist aus der
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, Wälzmühlen mit wenigstens zwei Mahlwalzen und wenigstens zwei Antrieben anzugeben, bei denen auf das Radiallager des Mahltellers nur geringe, das Radiallager nicht überlastende Kräfte entstehen, wenn eine einzelne Mahlwalze deaktiviert wird.The present invention has for its object to provide roller mills with at least two grinding rollers and at least two drives in which on the radial bearing of the grinding plate only small, the radial bearing not overloading forces arise when a single grinding roller is deactivated.
Diese Aufgabe wird gelöst durch eine Wälzmühle mit den Merkmalen des Anspruchs 1.This object is achieved by a roller mill having the features of
Entfernt man entgegen der in der oben zitierten
Eine Weiterbildung der Erfindung sieht vor, dass die Zahl der Antriebe gleich der Zahl der Mahlwalzen ist.A development of the invention provides that the number of drives is equal to the number of grinding rollers.
Eine besonders kostengünstige Ausgestaltung der Erfindung sieht vor, dass die Mahlwalzen mit den Schwinghebeln und die Antriebe modular vorgefertigt sind. Je nach Wunsch des Mühlenbetreibers werden mehr oder weniger Walzenmodule oder Antriebsmodule eingesetzt. Dadurch können Mühlenkomponenten wie Mahlwalzen, Schwinghebel, Motoren und Getriebe in Serie gefertigt und für Reparaturen auf Vorrat gehalten werden.A particularly cost-effective embodiment of the invention provides that the grinding rollers with the rocking levers and the drives are modular prefabricated. Depending on the wishes of the mill operator, more or fewer roll modules or drive modules are used. This allows mill components such as grinding rollers, rocker arms, motors and gears to be mass-produced and stockpiled for repairs.
Gegenstand der Erfindung ist des Weiteren ein Verfahren zum Betreiben einer Wälzmühle, welches es möglich macht, die bei Ausfall einer Mahlwalze entstehende Radialkraftkomponente zu kompensieren, so dass eine Überlastung der Mahltellerlagerung vermieden wird.The invention further provides a method for operating a roller mill, which makes it possible to compensate for the resulting in case of failure of a grinding roller radial force component, so that an overload of the grinding table storage is avoided.
Diese Aufgabe wird gelöst durch ein Verfahren mit den Merkmalen des Patentanspruchs 9.This object is achieved by a method having the features of patent claim 9.
Eine weitere Reduzierung der resultierenden Radialkraftkomponente wird erreicht, wenn die Winkelposition wenigstens eines der verbleibenden Antriebe so verändert wird, dass die resultierende Radialkraft minimal wird.A further reduction of the resulting radial force component is achieved when the angular position of at least one of the remaining drives is changed such that the resulting radial force becomes minimal.
Eine zusätzliche Möglichkeit zur weiteren Reduzierung der Radialkraft besteht darin, die verbleibenden Mahlwalzen zu schränken, so dass die resultierende Radialkraft minimal wird.An additional way to further reduce the radial force is to limit the remaining grinding rolls, so that the resulting radial force is minimal.
Anhand der Zeichnung soll die Erfindung in Form von Ausführungsbeispielen näher erläutert werden. Es zeigen jeweils rein schematisch
- Fig. 1
- eine Draufsicht auf eine Wälzmühle mit sechs auf Konsolen schwenkbar gelagerten Mahlwalzen und sechs Einzelantrieben,
- Fig. 2
- die beim Betrieb der Mühle nach
Fig. 1 entstehenden Radialkräfte unter verschiedenen Betriebsbedingungen, - Fig. 3
- die beim Betrieb einer Mühle mit fünf Mahlwalzen und fünf Antrieben entstehenden Radialkräfte,
- Fig. 4
- die Radialkräfte beim Betrieb einer Wälzmühle mit vier Mahlwalzen und vier Antrieben unter verschiedenen Betriebsbedingungen und
- Fig. 5
- die Radialkräfte einer Wälzmühle mit drei Mahlwalzen und drei Antrieben unter verschiedenen Betriebsbedingungen.
- Fig. 1
- a top view of a roller mill with six pivotally mounted on brackets grinding rollers and six individual drives,
- Fig. 2
- after the operation of the mill
Fig. 1 resulting radial forces under different operating conditions, - Fig. 3
- the radial forces created in the operation of a mill with five grinding rolls and five drives,
- Fig. 4
- the radial forces when operating a roller mill with four grinding rollers and four drives under different operating conditions and
- Fig. 5
- the radial forces of a roller mill with three grinding rollers and three drives under different operating conditions.
Des Weiteren erkennt man zwischen den sechs Mahlwalzen M sechs Antriebe A, bestehend aus Motor, vorzugsweise Elektromotor, und Getriebe. Alle Antriebe A arbeiten auf einen Zahnkranz (nicht dargestellt), der am Mahlteller 1 befestigt ist.Furthermore, it can be seen between the six grinding rollers M six drives A, consisting of motor, preferably electric motor, and transmission. All drives A work on a sprocket (not shown), which is attached to the grinding table 1.
Um die Antriebe A vom Mahlteller 1 abkoppeln zu können, sind sie auf Lafetten oder Schienen (nicht dargestellt) montiert.In order to decouple the drives A from the grinding table 1, they are mounted on carriages or rails (not shown).
Die Ausführungsbeispiele der
Es versteht sich des Weiteren, dass nicht nur wie in den Figuren dargestellt nur jeweils eine Mahlwalze und ein Antrieb deaktiviert werden können. Das erfindungsgemäße Prinzip funktioniert auch dann, wenn mehrere Mahlwalzen und die "passenden" Antriebe deaktiviert werden, wobei keine Notwendigkeit besteht, nur radial gegenüberliegende Einheiten zu deaktivieren, was ja nur dann möglich wäre, wenn eine gerade Anzahl von Mahlwalzen und Antrieben vorgesehen ist.It is further understood that not only as shown in the figures, only one grinding roller and a drive can be disabled. The inventive principle also works when several grinding rollers and the "matching" drives are disabled, with no need to disable only radially opposed units, which would only be possible if an even number of grinding rollers and drives is provided.
Claims (11)
- A roller grinding mill comprising:- a housing;- a grinding plate (1) with a grinding track, the grinding plate (1) being configured to be driven around a vertical centre axis;- at least two drives (A) each with motor and transmission and that are configured to drive the grinding plate (1);- grinding rollers (M) that roll on the grinding track (1), wherein one or more grinding rollers (M) being configured to be brought out of engagement;- an axial bearing for the grinding plate (1);- a radial bearing (3) for the grinding plate (1); wherein- the drives (A) are deactivatable while operation continues,- with one or more grinding rollers (M) brought out of engagement a first radial force component acts on the radial bearing (3), and wherein- for a grinding roller (M) brought out of engagement a "matching" drive (A) is deactivatable; wherein the "matching" drive (A) is the drive when deactivated the first radial force component (R1) acting on the radial bearing (3) is reduced in that the resultant radial force component (R) acting on the radial bearing (3) has a lower value than the first radial force component (R1).
- The roller grinding mill according to claim 1, characterized in that the grinding plate (1) is equipped with a girth gear, which the drives (A) act upon.
- The roller grinding mill according to either claim 1 or claim 2, characterized in that the grinding rollers (M) are separately mounted on brackets (5) via rocker arms (4).
- The roller grinding mill according to any of claims 1 to 3, characterized in that the drives (A) are configured to travel on carriages or rails.
- The roller grinding mill according to any of claims 1 to 4, characterized in that an angular position of at least one drive (A) is adjustable.
- The roller grinding mill according to any of claims 1 to 5, characterized in that the grinding rollers (M) are configured to be set at an angle.
- The roller grinding mill according to any of claims 1 to 6, characterized in that the number of drives (A) is equal to the number of grinding rollers (M).
- The roller grinding mill according to any of claims 3 to 7, characterized in that the grinding rollers (M) with rocker arms (4) and the drives (A) are each prefabricated in modular form.
- A method for operating a roller grinding mill having a grinding plate (1) being driven around a vertical centre axis; the grinding plate (1) being configured to be driven by at least two drives (A) each with motor and transmission and on which at least two grinding rollers (M) rolls, wherein one or more grinding rollers (M) being configured to be brought out of engagement, with an axial bearing and a radial bearing (3) for the grinding plate; wherein when lifting one or more grinding rollers (M) a first radial force component (R1) acts on a radial bearing (3) for the grinding plate (1) and such a drive (A) is deactivated which is adapted to reduce the first radial force component (R1) acting on the radial bearing (3) such that the resultant radial force component (R) acting on the radial bearing (3) has a lower value than the first radial force component (R1).
- The method according to claim 9, characterized in that the annular position of at least one of the remaining drives (A) is changed such that the resultant radial force (R) is further reduced.
- The method according to either claim 9 or claim 10, characterized in that at least one of the remaining grinding rollers (M) is set at an angle such that the resultant radial force (R) is further reduced.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL09722364T PL2252403T3 (en) | 2008-03-20 | 2009-03-10 | Roller grinding mill |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008015141A DE102008015141A1 (en) | 2008-03-20 | 2008-03-20 | roller mill |
PCT/EP2009/001691 WO2009115210A1 (en) | 2008-03-20 | 2009-03-10 | Roller grinding mill |
Publications (2)
Publication Number | Publication Date |
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EP2252403A1 EP2252403A1 (en) | 2010-11-24 |
EP2252403B1 true EP2252403B1 (en) | 2014-07-02 |
Family
ID=40602565
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP09722364.8A Active EP2252403B1 (en) | 2008-03-20 | 2009-03-10 | Roller grinding mill |
Country Status (11)
Country | Link |
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US (1) | US8172168B2 (en) |
EP (1) | EP2252403B1 (en) |
JP (1) | JP5683450B2 (en) |
KR (1) | KR101374124B1 (en) |
CN (1) | CN101977690B (en) |
DE (1) | DE102008015141A1 (en) |
DK (1) | DK2252403T3 (en) |
ES (1) | ES2505141T3 (en) |
PL (1) | PL2252403T3 (en) |
RU (1) | RU2483804C2 (en) |
WO (1) | WO2009115210A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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EP3851195A1 (en) | 2020-01-14 | 2021-07-21 | Gebr. Pfeiffer SE | Roller mill with inclined grinding rollers |
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Publication number | Priority date | Publication date | Assignee | Title |
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- 2009-03-10 WO PCT/EP2009/001691 patent/WO2009115210A1/en active Application Filing
- 2009-03-10 ES ES09722364.8T patent/ES2505141T3/en active Active
- 2009-03-10 EP EP09722364.8A patent/EP2252403B1/en active Active
- 2009-03-10 RU RU2010142908/13A patent/RU2483804C2/en active
- 2009-03-10 KR KR1020107021020A patent/KR101374124B1/en active IP Right Grant
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EP3851195A1 (en) | 2020-01-14 | 2021-07-21 | Gebr. Pfeiffer SE | Roller mill with inclined grinding rollers |
WO2021144358A1 (en) | 2020-01-14 | 2021-07-22 | Gebr. Pfeiffer Se | Roller mill having crosswise grinding rollers |
Also Published As
Publication number | Publication date |
---|---|
PL2252403T3 (en) | 2014-11-28 |
WO2009115210A1 (en) | 2009-09-24 |
JP2011514256A (en) | 2011-05-06 |
KR20110000639A (en) | 2011-01-04 |
DK2252403T3 (en) | 2014-10-13 |
ES2505141T3 (en) | 2014-10-09 |
CN101977690B (en) | 2012-08-29 |
RU2010142908A (en) | 2012-04-27 |
US20110068203A1 (en) | 2011-03-24 |
DE102008015141A1 (en) | 2009-11-05 |
RU2483804C2 (en) | 2013-06-10 |
US8172168B2 (en) | 2012-05-08 |
EP2252403A1 (en) | 2010-11-24 |
KR101374124B1 (en) | 2014-03-13 |
CN101977690A (en) | 2011-02-16 |
JP5683450B2 (en) | 2015-03-11 |
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