EP3727697B1 - Roll lever module - Google Patents

Roll lever module Download PDF

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Publication number
EP3727697B1
EP3727697B1 EP19702026.6A EP19702026A EP3727697B1 EP 3727697 B1 EP3727697 B1 EP 3727697B1 EP 19702026 A EP19702026 A EP 19702026A EP 3727697 B1 EP3727697 B1 EP 3727697B1
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EP
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Prior art keywords
roller lever
roller
bearing
central body
lever module
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EP19702026.6A
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German (de)
French (fr)
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EP3727697A1 (en
Inventor
Alexander KLOKOW
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Loesche GmbH
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Loesche 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
    • B02C15/007—Mills with rollers pressed against a rotary horizontal disc
    • 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
    • B02C15/004—Shape or construction of rollers or balls
    • 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

Definitions

  • the invention relates to a roller lever module for a grinding roller of a roller mill, which has a rotating grinding table and grinding rollers rolling thereon.
  • the roller lever module has a roller lever, at the end of which a grinding roller can be fastened on the grinding plate side.
  • a guiding and storage unit with a guiding axis is also provided.
  • the side of the roller lever facing away from the grinding plate is coupled to the guide and bearing unit, with the guide and bearing unit being designed as a linear guide for displacing the roller lever axially along the guide axis, according to the preamble of claim 1.
  • a roller mill with a corresponding roller lever module is also claimed.
  • Roller mills are used for crushing any type of material to be ground.
  • a rotating grinding table is usually provided, on which stationary, rotating grinding rollers roll. These are not necessarily driven, but are often set in rotation by the material to be ground, which is on the rotating grinding table. Since the material to be ground does not form an ideal grinding bed on the grinding table, it is necessary for the grinding rollers to be able to change their distance from the grinding table.
  • Various constructions are known for this. It is essential here that the design allows sufficient freedom of movement for the grinding rollers. Such constructions are referred to as roller lever module.
  • the grinding rollers themselves are each connected to an axle which is mounted in the roller lever.
  • the roller lever itself is connected to the roller lever module.
  • the construction is essential here so that the compensating movements described above can be carried out. Since vibrations also occur during the grinding process, it is also necessary to absorb and dampen them, ideally using the roller lever modules.
  • roller lever module The construction of a roller lever module is, for example, from WO 2017/137056 out.
  • the roller lever is fastened in a fork-like device, which in turn allows the roller lever to pivot in an axis perpendicular to the axis of rotation of the grinding roller.
  • a disadvantage of the known systems is that they often have a relatively large design.
  • mill technology however, there is a trend towards larger and larger mills, which in turn have several grinding rollers.
  • roller lever modules as compactly as possible, so that as many grinding rollers as possible can be arranged around a grinding table in a space-saving manner.
  • a roller lever module for a grinding roller of a roller mill with a roller lever is known, at the end of which a grinding roller can be fastened on the grinding plate side.
  • a guiding and bearing unit with a guide axis is also provided, the roller lever being coupled to the guiding and bearing unit and the guiding and bearing unit being designed as a linear guide for displacing the roller lever axially along the guide axis.
  • the U.S. 4,218,023 A refers to roller lever modules with hydrostatic thrust bearings, the latter being able to support the grinding table and absorb the vertical loads.
  • the invention is therefore based on the object of specifying a roller lever module which has a compact construction.
  • this object is achieved by a roller lever module having the features of claim 1 .
  • the roller lever module according to the invention is further developed in that the guiding and bearing unit has a central body that is elongated in the direction of the guiding axis, with the central body being surrounded by an outer sleeve.
  • the outer sleeve is arranged and/or attached to the central body so that it can be displaced in the direction of the guide axis.
  • At least one linear guide bearing is provided between the outer sleeve and the central body.
  • a unit for transmitting a torque from the roller lever to the central body is arranged between the outer sleeve and the central body.
  • the invention is based on the idea of distributing the forces acting on the grinding roller and thus on the roller lever over different units.
  • the roller lever module must be able to withstand the loads arising from the roller force, i.e. the pressure with which the grinding roller presses the material to be ground on the grinding table, and the loads from the bowl rotation, i.e. in particular the torques generated by the rotation of the bowl via the Material to be ground on the grinding roller and are thus transferred to the roller lever.
  • two separate devices are provided for receiving and forwarding the corresponding loads.
  • the forces and loads that arise from the pressure of the grinding rollers themselves are absorbed and transmitted in particular by the at least one linear guide bearing.
  • the forces are absorbed by the elongated central body and introduced into a foundation via a bracket provided for it.
  • the forces, in particular the torques, resulting from the rotation of the bowl are transmitted to the central body via the unit for transmitting a torque.
  • the at least one linear guide bearing also serves to enable the roller lever and thus the grinding roller connected to it to be able to move in the direction of the guide axis.
  • unevenness on the grinding bed can be compensated.
  • the grinding gap i.e. the standard distance between the grinding roller and the grinding table, can also be set here. This is advantageous, for example, when different materials are to be ground.
  • any type of bearing can be used as a linear guide bearing.
  • a hydrostatic bearing is used for this.
  • Hydrostatic bearings have a high power density, which in turn enables the compact design of the roller lever module.
  • first linear guide bearing in the upper area of the central body and the second linear guide bearing in the lower area be arranged of the central body. Such an arrangement promotes good transmission of the forces generated on the roller lever to the central body.
  • this arrangement offers to arrange the unit for transmitting the torque between the at least first and the at least second linear guide bearing.
  • the unit for transmitting the torque can be arranged centrally.
  • the unit for transmitting the torque can be designed in any way.
  • this is to design this as a curved tooth coupling.
  • parts of the curved tooth coupling for example teeth, can be formed on the central body.
  • it can also be provided to provide an inner sleeve which surrounds the central body. This can be arranged in a rotationally fixed manner on the central body.
  • corresponding components of the curved tooth coupling can also be formed on the inner sleeve instead of on the central body. This offers the advantage that the inner sleeve can be replaced if damaged, but the central body can still be used.
  • the teeth or engagement parts on the inner sleeve or on the central body have a longer extension along the guide axis than the teeth or engagement elements which are formed on the inside of the outer sleeve.
  • the unit for transmitting the torque is also designed as a correspondingly arranged and dimensioned hydrostatic bearing.
  • the advantage of using a curved tooth coupling is that it has a small size and can be easily integrated into a compactly dimensioned roller lever module.
  • the linear guide bearing can be designed as a hydrostatic bearing.
  • the hydrostatic bearing can have a bearing sleeve which essentially has an inside diameter which corresponds to the outside diameter of the central body or the inner sleeve.
  • various elements can be provided on the bearing sleeve or can be formed on or in it.
  • the bearing sleeve prefferably has radial lubricant supply channels.
  • axial lubricant return channels can be provided on the bearing sleeve.
  • pressure pockets can be formed on the inside of the bearing sleeve.
  • the lubricant supply channels preferably extend radially through the bearing sleeve and serve to supply lubricant from the outside of the bearing sleeve to its inside. Supplied lubricant can then flow upwards or downwards through the axially arranged lubricant return channels on the inside of the bearing sleeve.
  • the pressure pockets provided on the inside of the bearing sleeve serve to hold lubricant at least temporarily. The lubricant flows via the lubricant supply channels into the pressure pockets and remains in them or is continuously exchanged by transporting approximately the same volume through the lubricant return channels, which volume is simultaneously added through the lubricant supply channels.
  • a free space between the outer sleeve and the central body is filled with lubricant. If an inner sleeve is provided, the free space is between the outer sleeve and the inner sleeve.
  • the space that is not yet occupied by components after the arrangement of one or more linear guide bearings and the unit for transmitting a torque can be referred to as free space.
  • Lubricant is used for good lubrication of the components arranged there and thus supports the longevity of the construction of the roller lever module.
  • a lubricant suction device can be provided at the upper end of the roller lever module.
  • hydrostatic bearings which ideally have a continuous supply of lubricant, it is necessary to drain the supplied lubricant again.
  • the arrangement of the lubricant suction in the upper end area of the roller lever module has the advantage that it ensures that a sufficiently high level of lubricant is present in the free space mentioned.
  • a particularly reliable operation of the roller lever module can be achieved if the pressure in the free space is essentially ambient.
  • the lubricant in the free space is not under pressure, but is merely pumped through and sucked off at the lubricant suction device arranged in the upper area, for example, with the same volume per unit of time as it is, especially in the area of the hydrostatic Stock, is supplied.
  • Sealing of the free space of the roller lever module can be achieved, for example, by providing a piston ring seal in the upper and lower area.
  • the roller lever which has the axis of the grinding roller, is preferably attached to the outer sleeve. This type of attachment also allows a relatively compact structure.
  • a hydraulic cylinder can be provided on the grinding roller lever. This is preferably aligned with a push or pull direction essentially parallel to the central body or the guide axis of the guiding and bearing unit.
  • the grinding roller lever module according to the invention is preferably used in a roller mill with a grinding table and grinding rollers rolling on it.
  • per Grinding roller provided a grinding roller lever module.
  • the roller lever module can also be referred to as a grinding roller lever module.
  • the grinding roller lever modules Due to the compact design of the grinding roller lever modules according to the invention, it is possible to provide two grinding roller lever modules on a common stand, which can be made of concrete, for example. This in turn allows for a relatively compact structure around the roller mill, so that there is enough space for other devices required for operation.
  • figure 1 is a simplified representation of a roller mill without a housing and classifier and without other components that are not essential to the invention.
  • Three stands 102 are provided here around a centrally arranged grinding table 101 .
  • a bearing block is provided for each roller lever module.
  • the dedicated bearing block can then be provided with a second bearing block on a common stand, but also on a separate stand in each case.
  • a roller lever module 1 consists essentially of a roller lever 3 and a guide and bearing unit 20.
  • a grinding roller 10 is provided at the end of the roller lever 3 on the grinding plate side. This is non-rotatably connected to an axis which runs within the roller lever 3 .
  • the grinding table 101 is only shown as a ring. In a non-simplified representation of a roller mill, it is usually an essentially circular disk.
  • the grinding table 101 is set in rotation.
  • material to be ground is transported outwards to the grinding rollers 10 by means of centrifugal forces.
  • the material to be ground which is transported under the grinding rollers 10 is comminuted on the one hand by the pressure which the grinding rollers 10 exert on the material to be ground.
  • the contact with the material to be ground ensures that the grinding rollers 10 rotate about their axis.
  • FIG. 1 An enlarged representation of a stand 102 with two roller lever modules 1 is shown in 2 shown.
  • Each roller lever module 1 has its own bearing block 30 .
  • the guiding and bearing unit 20 of each roller module 1 is fitted into this.
  • a linear movement of the grinding roller 10 perpendicular to the grinding table 101 is possible by means of the guide and bearing unit 20, to which the roller lever 3 is fastened.
  • the detailed structure of the guiding and storage unit 20 is described below with reference to FIG 3 described in more detail.
  • a hydraulic cylinder 5 is provided between the stand 102 and the roller lever 3 . This serves to vary the force that is applied to the grinding bed on the grinding table 101 by means of the grinding roller 10 . If the hydraulic cylinder 5 pulls, this force is increased; if it presses, the force can be reduced. In more detail, increasing the hydraulic pressure on the piston rod side results in a higher pulling force on the piston rod. Decreasing the hydraulic pressure on the piston rod side results in a reduction in force, as does increasing the hydraulic pressure in the piston-side cylinder chamber, which is at the bottom in this figure. This can even lead to the rollers being lifted off if the compressive force is greater than the weight of the moving system.
  • FIG. 3 a sectional view of a guiding and bearing unit 20 of a roller lever module 1 according to the invention is shown.
  • a central body 22 which is cylindrical.
  • An inner sleeve 25 is provided around the central body 22 . This is preferably non-rotatably connected to the central body 22 .
  • An outer sleeve 24 is in turn arranged around the inner sleeve 25 .
  • On the outside of the inner sleeve 25 and on the inside of the outer sleeve 24 are parts of a curved tooth coupling 31 which are used to transmit a torque from the roller lever 3 .
  • the outer sleeve 24 is preferably attached in a linearly displaceable manner in the axial direction of the central body 22 .
  • larger portions of the curved tooth coupling 31 are formed on the inner sleeve 25 provided fixed to the central body 22 .
  • Smaller parts that engage, in particular mesh, with the areas on the inner sleeve 25 are provided on the outer sleeve 24 . With a linear displacement of the outer sleeve 24, these parts move within the parts that are provided on the inner sleeve 25, so that a power or torque transmission is still possible.
  • a hydrostatic bearing 26 , 28 is arranged in each case in the lower and upper area of the guiding and bearing unit 20 . This extends between the outer 24 and the inner sleeve 25. At the contact area between the outer sleeve 24 and the inner sleeve 25, a suction point 36 is provided, at which the lubricant introduced for the hydrostatic bearing 28 can be sucked off again.
  • a seal for example a piston ring seal 34, is provided at the lower contact point between the outer sleeve 24 and the inner sleeve 25 in order to seal the clearance 27 between the sleeves 24, 25 so that the lubricant can only be removed via the suction point 36.
  • a similar seal can also be provided at the upper contact point or at the contact surface between the outer sleeve 24 and the inner sleeve 25 .
  • the roller lever 3 itself is attached to the outer sleeve 24 .
  • roller lever 3 By means of the hydrostatic bearings 26, 28 and the curved tooth clutch 31, it is possible for the roller lever 3 to move up and down along the central axis of the central body 22 and the inner sleeve 25.
  • a hydrostatic bearing 26, 28 is discussed in more detail.
  • This consists essentially of a bearing sleeve 42.
  • the bearing sleeve 42 has an inner diameter which essentially corresponds to the outer diameter of the inner sleeve 25.
  • Radially extending lubricant feeds 44 are provided in the bearing sleeve 42 .
  • Axially designed lubricant return lines 46 serve to allow the lubricant supplied via the lubricant supply lines 44 to run off again.
  • pressure pockets 48 are provided between the lubricant returns 46, in which ideally lubricant is located during operation, so that the bearing and guiding effect of the hydrostatic bearings 26, 28 is present.
  • Lubricant is located in the free space 27 between the inner sleeve 25 and the outer sleeve 24 and is supplied to the hydrostatic bearings 26 , 28 via the lubricant supply channels 44 .
  • This lubricant has a dampening effect on vibrations that cause the roller levers 3 to move up and down. This means that with the roller lever module 1 according to the invention, a roller mill runs more smoothly and can therefore be operated more efficiently.

Description

Die Erfindung betrifft ein Walzenhebelmodul für eine Mahlwalze einer Wälzmühle, welche einen rotierenden Mahlteller und darauf abrollende Mahlwalzen aufweist. Das Walzenhebelmodul hat einen Walzenhebel, an dessen mahltellerseitigem Ende eine Mahlwalze befestigbar ist. Ferner ist eine Führ- und Lagereinheit mit einer Führungsachse vorgesehen. Der Walzenhebel ist mit seiner mahltellerabgewandten Seite mit der Führ-und Lagereinheit gekoppelt, wobei die Führ- und Lagereinheit als Linearführung zum Verschieben des Walzenhebels axial entlang der Führungsachse ausgebildet ist, gemäß Oberbegriff des Anspruchs 1. Auch eine Wälzmühle mit entsprechendem Walzenhebelmodul wird beansprucht.The invention relates to a roller lever module for a grinding roller of a roller mill, which has a rotating grinding table and grinding rollers rolling thereon. The roller lever module has a roller lever, at the end of which a grinding roller can be fastened on the grinding plate side. A guiding and storage unit with a guiding axis is also provided. The side of the roller lever facing away from the grinding plate is coupled to the guide and bearing unit, with the guide and bearing unit being designed as a linear guide for displacing the roller lever axially along the guide axis, according to the preamble of claim 1. A roller mill with a corresponding roller lever module is also claimed.

Wälzmühen werden zur Zerkleinerung von beliebigen Mahlgütern eingesetzt. Meist ist ein rotierender Mahlteller vorgesehen, auf dem ortsfeste, drehbare Mahlwalzen abrollen. Diese sind nicht zwingend angetrieben, sondern werden oft durch das Mahlgut, welches sich auf dem rotierenden Mahlteller befindet, in Rotation versetzt. Da das Mahlgut auf dem Mahlteller kein ideales Mahlbett ausbildet, ist es erforderlich, dass die Mahlwalzen ihren Abstand zum Mahlteller verändern können. Hierfür sind verschiedene Konstruktionen bekannt. Wesentlich ist hierbei, dass die Konstruktion eine ausreichende Bewegungsfreiheit der Mahlwalzen ermöglicht. Derartige Konstruktionen werden als Walzenhebelmodul bezeichnet.Roller mills are used for crushing any type of material to be ground. A rotating grinding table is usually provided, on which stationary, rotating grinding rollers roll. These are not necessarily driven, but are often set in rotation by the material to be ground, which is on the rotating grinding table. Since the material to be ground does not form an ideal grinding bed on the grinding table, it is necessary for the grinding rollers to be able to change their distance from the grinding table. Various constructions are known for this. It is essential here that the design allows sufficient freedom of movement for the grinding rollers. Such constructions are referred to as roller lever module.

Die Mahlwalzen selbst sind jeweils mit einer Achse verbunden, welche in dem Walzenhebel gelagert ist. Der Walzenhebel selbst ist mit dem Walzenhebelmodul verbunden. Hierbei ist die Konstruktion wesentlich, damit die zuvor beschriebenen Ausgleichsbewegungen durchgeführt werden können. Da im Mahlvorgang auch Vibrationen entstehen, ist es auch notwendig, diese idealerweise über die Walzenhebelmodule abzufangen und zu dämpfen.The grinding rollers themselves are each connected to an axle which is mounted in the roller lever. The roller lever itself is connected to the roller lever module. The construction is essential here so that the compensating movements described above can be carried out. Since vibrations also occur during the grinding process, it is also necessary to absorb and dampen them, ideally using the roller lever modules.

Die Konstruktion eines Walzenhebelmoduls geht beispielsweise aus der WO 2017/137056 hervor. Hierbei ist der Walzenhebel in einer gabelartigen Vorrichtung befestigt, die wiederum ein Schwenken des Walzenhebels in einer Achse senkrecht zur Rotationsachse der Mahlwalze zulässt.The construction of a roller lever module is, for example, from WO 2017/137056 out. In this case, the roller lever is fastened in a fork-like device, which in turn allows the roller lever to pivot in an axis perpendicular to the axis of rotation of the grinding roller.

Nachteilig an den bekannten Systemen ist, dass diese oft eine relativ große Bauform aufweisen. In der Mühlentechnik gibt es allerdings den Trend zu immer größeren Mühlen, die wiederum mehrere Mahlwalzen aufweisen. Daher besteht der Wunsch, Walzenhebelmodule möglichst kompakt aufzubauen, damit möglichst viele Mahlwalzen platzsparend um einen Mahlteller angeordnet werden können.A disadvantage of the known systems is that they often have a relatively large design. In mill technology, however, there is a trend towards larger and larger mills, which in turn have several grinding rollers. There is therefore a desire to construct roller lever modules as compactly as possible, so that as many grinding rollers as possible can be arranged around a grinding table in a space-saving manner.

Aus der US 4 896 837 A ist ein Walzenhebelmodul für eine Mahlwalze einer Wälzmühle mit einem Walzenhebel bekannt, an dessen mahltellerseitigem Ende eine Mahlwalze befestigbar ist. Es ist auch eine Führ- und Lagereinheit mit einer Führungsachse vorgesehen, wobei der Walzenhebel mit der Führ- und Lagereinheit gekoppelt ist und die Führ- und Lagereinheit als Linearführung zum Verschieben des Walzenhebels axial entlang der Führungsachse ausgebildet ist.From the U.S.A. 4,896,837 a roller lever module for a grinding roller of a roller mill with a roller lever is known, at the end of which a grinding roller can be fastened on the grinding plate side. A guiding and bearing unit with a guide axis is also provided, the roller lever being coupled to the guiding and bearing unit and the guiding and bearing unit being designed as a linear guide for displacing the roller lever axially along the guide axis.

Die US 4 218 023 A bezieht sich auf Walzenhebelmodule mit hydrostatischen Axiallagern, wobei letztere den Mahlteller tragen und die vertikalen Lasten aufnehmen können.the U.S. 4,218,023 A refers to roller lever modules with hydrostatic thrust bearings, the latter being able to support the grinding table and absorb the vertical loads.

Der Erfindung liegt daher die Aufgabe zugrunde, ein Walzenhebelmodul anzugeben, welches eine kompakte Konstruktion aufweist.The invention is therefore based on the object of specifying a roller lever module which has a compact construction.

Diese Aufgabe wird erfindungsgemäß durch ein Walzenhebelmodul mit den Merkmalen des Anspruchs 1 gelöst.According to the invention, this object is achieved by a roller lever module having the features of claim 1 .

Vorteilhafte Ausführungsformen der Erfindung sind in den Unteransprüchen, in der Beschreibung sowie den Figuren und deren Erläuterung angegeben.Advantageous embodiments of the invention are specified in the dependent claims, in the description and in the figures and their explanation.

Bei dem erfindungsgemäßen Walzenhebelmodul ist vorgesehen, dass dieses dadurch weitergebildet ist, dass die Führ- und Lagereinheit einen in Richtung der Führungsachse länglichen Zentralkörper aufweist, wobei der Zentralkörper von einer äußeren Hülse umgeben ist.The roller lever module according to the invention is further developed in that the guiding and bearing unit has a central body that is elongated in the direction of the guiding axis, with the central body being surrounded by an outer sleeve.

Die äußere Hülse ist in Richtung der Führungsachse verschiebbar am Zentralkörper angeordnet und/oder befestigt. Zwischen der äußeren Hülse und dem Zentralkörper ist mindestens ein lineares Führungslager vorgesehen. Ferner ist zwischen der äußeren Hülse und dem Zentralkörper eine Einheit zum Übertragen eines Drehmoments vom Walzenhebel auf den Zentralkörper angeordnet.The outer sleeve is arranged and/or attached to the central body so that it can be displaced in the direction of the guide axis. At least one linear guide bearing is provided between the outer sleeve and the central body. Furthermore, a unit for transmitting a torque from the roller lever to the central body is arranged between the outer sleeve and the central body.

Der Erfindung liegt die Idee zugrunde, die auf die Mahlwalze und somit auf den Walzenhebel wirkenden Kräfte auf verschiedene Einheiten zu verteilen. Grundsätzlich muss das Walzenhebelmodul geeignet sein, die entstehenden Lasten aus der Walzenkraft, das heißt dem Druck, mit dem die Mahlwalze das Mahlgut auf dem Mahlteller drückt und die Lasten aus der Schüsselrotation, das heißt insbesondere die Drehmomente, die durch die Rotation der Schüssel über das Mahlgut auf die Mahlwalze und somit auf den Walzenhebel übertragen werden, aufzunehmen. Entsprechend der Erfindung sind jeweils zwei separate Einrichtungen für die Aufnahme und das Weiterleiten der entsprechenden Lasten vorgesehen.The invention is based on the idea of distributing the forces acting on the grinding roller and thus on the roller lever over different units. In principle, the roller lever module must be able to withstand the loads arising from the roller force, i.e. the pressure with which the grinding roller presses the material to be ground on the grinding table, and the loads from the bowl rotation, i.e. in particular the torques generated by the rotation of the bowl via the Material to be ground on the grinding roller and are thus transferred to the roller lever. According to the invention, two separate devices are provided for receiving and forwarding the corresponding loads.

Die Kräfte und Lasten, die aus dem Druck der Mahlwalzen selbst entstehen, werden insbesondere durch das mindestens eine lineare Führungslager aufgenommen und übertragen. Aufgenommen werden die Kräfte letztendlich vom länglichen Zentralkörper und über eine für ihn vorgesehene Halterung in ein Fundament eingeleitet. Die Kräfte, insbesondere die Drehmomente, die aus der Schüsselrotation stammen, werden über die Einheit zum Übertragen eines Drehmomentes auf den Zentralkörper übertragen. Durch die Aufteilung dieser beiden kraftübertragenden Einheiten ist es möglich, die Führ- und Lagereinheit besonders kompakt und schmal auszuführen. Dies wird ebenfalls dadurch unterstützt, dass sowohl das mindestens eine lineare Führungslager als auch die Einheit zum Übertragen eines Drehmomentes zwischen der den Zentralkörper umgebenden äußeren Hülse und dem Zentralkörper angeordnet sind.The forces and loads that arise from the pressure of the grinding rollers themselves are absorbed and transmitted in particular by the at least one linear guide bearing. Ultimately, the forces are absorbed by the elongated central body and introduced into a foundation via a bracket provided for it. The forces, in particular the torques, resulting from the rotation of the bowl are transmitted to the central body via the unit for transmitting a torque. By dividing these two force-transmitting units, it is possible to design the guide and bearing unit to be particularly compact and narrow. This is also supported by the fact that both the at least one linear guide bearing and the unit for transmitting a torque are arranged between the outer sleeve surrounding the central body and the central body.

Das mindestens eine lineare Führungslager dient ferner dazu, dass sich der Walzenhebel und somit die mit ihm verbundene Mahlwalze in Richtung der Führungsachse verschieben kann. Somit können zum einen Unebenheiten auf dem Mahlbett ausgeglichen werden. Zum anderen kann hierüber auch der Mahlspalt, das heißt der standardmäßige Abstand zwischen der Mahlwalze und dem Mahlteller eingestellt werden. Dies ist beispielsweise vorteilhaft, wenn unterschiedliche Materialen gemahlen werden sollen.The at least one linear guide bearing also serves to enable the roller lever and thus the grinding roller connected to it to be able to move in the direction of the guide axis. Thus, on the one hand, unevenness on the grinding bed can be compensated. On the other hand, the grinding gap, i.e. the standard distance between the grinding roller and the grinding table, can also be set here. This is advantageous, for example, when different materials are to be ground.

Grundsätzlich können beliebige Lagertypen als lineares Führungslager verwendet werden. Vorteilhaft ist es jedoch, wenn hierfür ein hydrostatisches Lager verwendet wird. Hydrostatische Lager weisen eine hohe Leistungsdichte auf, welche wiederum die kompakte Bauform des Walzenhebelmoduls ermöglicht.In principle, any type of bearing can be used as a linear guide bearing. However, it is advantageous if a hydrostatic bearing is used for this. Hydrostatic bearings have a high power density, which in turn enables the compact design of the roller lever module.

Grundsätzlich ist die Verwendung von einem einzelnen linearen Führungslager ausreichend. Bevorzugt ist es jedoch, wenn zwei oder mehr Führungslager vorgesehen sind. Beispielsweise ist es möglich, mindestens ein erstes und mindestens ein zweites lineares Führungslager, welche bevorzugt als hydrostatische Lager ausgeführt sind, vorzusehen. Hierbei kann das erste lineare Führungslager im oberen Bereich des Zentralkörpers und das zweite lineare Führungslager im unteren Bereich des Zentralkörpers angeordnet sein. Eine derartige Anordnung fördert eine gute Übertragung der am Walzenhebel entstehenden Kräfte auf den Zentralkörper.In principle, the use of a single linear guide bearing is sufficient. However, it is preferred if two or more guide bearings are provided. For example, it is possible to provide at least one first and at least one second linear guide bearing, which are preferably designed as hydrostatic bearings. Here, the first linear guide bearing in the upper area of the central body and the second linear guide bearing in the lower area be arranged of the central body. Such an arrangement promotes good transmission of the forces generated on the roller lever to the central body.

Außerdem bietet diese Anordnung an, die Einheit zum Übertragen des Drehmomentes zwischen dem mindestens ersten und dem mindestens zweiten linearen Führungslager anzuordnen. In dieser Ausführungsform, jedoch auch in anderen Ausführungsformen, beispielsweise mit einem linearen Führungslager oder drei, vier oder noch mehreren Führungslagern, kann die Einheit zum Übertragen des Drehmomentes mittig angeordnet sein.In addition, this arrangement offers to arrange the unit for transmitting the torque between the at least first and the at least second linear guide bearing. In this embodiment, but also in other embodiments, for example with a linear guide bearing or three, four or even more guide bearings, the unit for transmitting the torque can be arranged centrally.

Grundsätzlich kann die Einheit zum Übertragen des Drehmomentes beliebig ausgeführt sein. Eine Möglichkeit ist, diese als Bogenzahnkupplung auszuführen. Hierbei können Teile der Bogenzahnkupplung, beispielsweise Zähne am Zentralkörper ausgebildet sein. In diesem Zusammenhang kann es auch vorgesehen sein, eine innere Hülse vorzusehen, welche den Zentralkörper umgibt. Diese kann drehfest am Zentralkörper angeordnet sein. Bei einer derartigen Konstruktion können entsprechende Bauteile der Bogenzahnkupplung anstelle am Zentralkörper auch an der inneren Hülse ausgebildet sein. Dies bietet den Vorteil, dass die innere Hülse ausgetauscht werden kann, falls Schäden vorliegen, jedoch der Zentralkörper weiterhin verwendet werden kann.In principle, the unit for transmitting the torque can be designed in any way. One possibility is to design this as a curved tooth coupling. In this case, parts of the curved tooth coupling, for example teeth, can be formed on the central body. In this connection it can also be provided to provide an inner sleeve which surrounds the central body. This can be arranged in a rotationally fixed manner on the central body. With such a construction, corresponding components of the curved tooth coupling can also be formed on the inner sleeve instead of on the central body. This offers the advantage that the inner sleeve can be replaced if damaged, but the central body can still be used.

Andere Teile der Bogenzahnkupplung, welche in die am Zentralkörper beziehungsweise an der inneren Hülse vorgesehenen Zähne einkämmen, beziehungsweise eingreifen können, sind demgemäß auch an der äußeren Hülse vorgesehen, hierbei insbesondere an der Innenseite der äußeren Hülse.Other parts of the curved tooth coupling, which can mesh or engage in the teeth provided on the central body or on the inner sleeve, are accordingly also provided on the outer sleeve, in particular on the inside of the outer sleeve.

Da die äußere Hülle in Richtung der Führungsachse verschiebbar ist, die innere Hülse beziehungsweise der Zentralkörper jedoch nicht, ist es bevorzugt, wenn die Zähne oder Eingriffsteile an der inneren Hülse beziehungsweise am Zentralkörper eine längere Streckung entlang der Führungsachse aufweisen als die Zähne oder Eingriffselemente, welche an der Innenseite der äußeren Hülse ausgebildet sind.Since the outer shell is displaceable in the direction of the guide axis, but the inner sleeve or the central body is not, it is preferred if the teeth or engagement parts on the inner sleeve or on the central body have a longer extension along the guide axis than the teeth or engagement elements which are formed on the inside of the outer sleeve.

Generell besteht auch die Möglichkeit, die Einheit zum Übertragen des Drehmomentes ebenfalls als ein entsprechend angeordnetes und dimensioniertes hydrostatisches Lager auszuführen. Der Vorteil beim Verwenden einer Bogenzahnkupplung ist, dass diese eine geringe Baugröße aufweist und so gut in ein kompakt dimensioniertes Walzenhebelmodul zu integrieren ist.In general, there is also the possibility of also designing the unit for transmitting the torque as a correspondingly arranged and dimensioned hydrostatic bearing. The advantage of using a curved tooth coupling is that it has a small size and can be easily integrated into a compactly dimensioned roller lever module.

Wie bereits ausgeführt, kann das lineare Führungslager als hydrostatisches Lager ausgeführt sein. Das hydrostatische Lager kann hierbei eine Lagerhülse aufweisen, welche im Wesentlichen einen Innendurchmesser aufweist, welcher dem Außendurchmesser des Zentralkörpers oder der inneren Hülse entspricht. Um das hydrostatische Lager zu realisieren beziehungsweise zu optimieren, können an der Lagerhülse verschiedene Elemente vorgesehen sein beziehungsweise an oder in dieser ausgebildet sein.As already stated, the linear guide bearing can be designed as a hydrostatic bearing. In this case, the hydrostatic bearing can have a bearing sleeve which essentially has an inside diameter which corresponds to the outside diameter of the central body or the inner sleeve. In order to implement or optimize the hydrostatic bearing, various elements can be provided on the bearing sleeve or can be formed on or in it.

So ist es möglich, dass die Lagerhülse radiale Schmiermittelzuführungskanäle aufweist. Ebenso können an der Lagerhülse axiale Schmiermittelrücklaufkanäle vorgesehen sein. Ferner ist es möglich, an der Innenseite der Lagerhülse Drucktaschen auszubilden. Diese Ausbildungen können jeweils separat, aber auch in Kombination vorgesehen sein.It is thus possible for the bearing sleeve to have radial lubricant supply channels. Likewise, axial lubricant return channels can be provided on the bearing sleeve. Furthermore, it is possible to form pressure pockets on the inside of the bearing sleeve. These trainings can each be provided separately, but also in combination.

Die Schmiermittelzuführungskanäle erstrecken sich bevorzugt radial durch die Lagerhülse und dienen zur Zuführung von Schmiermittel von der Außenseite der Lagerhülse zu ihrer Innenseite. Zugeführtes Schmiermittel kann anschließend durch die axial angeordneten Schmiermittelrücklaufkanäle nach oben oder nach unten an der Innenseite der Lagerhülse abfließen. Die an der Innenseite der Lagerhülse vorgesehenen Drucktaschen dienen zur zumindest temporären Aufnahme von Schmiermittel. Das Schmiermittel fließt über die Schmiermittelzuführkanäle in die Drucktaschen und verbleibt in diesen beziehungsweise wird kontinuierlich ausgetauscht, indem ein ungefähr gleiches Volumen durch die Schmiermittelrücklaufkanäle abtransportiert wird, welches zeitgleich durch die Schmiermittelzuführungskanäle zugefügt wird.The lubricant supply channels preferably extend radially through the bearing sleeve and serve to supply lubricant from the outside of the bearing sleeve to its inside. Supplied lubricant can then flow upwards or downwards through the axially arranged lubricant return channels on the inside of the bearing sleeve. The pressure pockets provided on the inside of the bearing sleeve serve to hold lubricant at least temporarily. The lubricant flows via the lubricant supply channels into the pressure pockets and remains in them or is continuously exchanged by transporting approximately the same volume through the lubricant return channels, which volume is simultaneously added through the lubricant supply channels.

In einer vorteilhaften Ausführungsform ist ein Freiraum zwischen der äußeren Hülse und dem Zentralkörper mit Schmiermittel gefüllt. Ist eine innere Hülse vorgesehen, so liegt der Freiraum zwischen der äußeren Hülse und der inneren Hülse vor. Als Freiraum kann der Raum bezeichnet werden, der nach Anordnen eines oder mehrerer linearer Führungslager und der Einheit zum Übertragen eines Drehmomentes noch nicht mit Bauteilen belegt ist. Das Vorsehen und Auffüllen dieses Freiraums mitIn an advantageous embodiment, a free space between the outer sleeve and the central body is filled with lubricant. If an inner sleeve is provided, the free space is between the outer sleeve and the inner sleeve. The space that is not yet occupied by components after the arrangement of one or more linear guide bearings and the unit for transmitting a torque can be referred to as free space. The provision and filling of this free space with

Schmiermittel dient einer guten Schmierung der dort angeordneten Bauteile und unterstützt so die Langlebigkeit der Konstruktion des Walzenhebelmoduls.Lubricant is used for good lubrication of the components arranged there and thus supports the longevity of the construction of the roller lever module.

Am oberen Ende des Walzenhebelmoduls kann eine Schmiermittelabsaugung vorgesehen sein. Insbesondere bei der Verwendung von hydrostatischen Lagern, die idealerweise einen kontinuierlichen Schmiermittelzufluss aufweisen, ist es notwendig, das zugeführte Schmiermittel auch wieder abzuführen. Die Anordnung der Schmiermittelabsaugung im oberen Endbereich des Walzenhebelmoduls hat den Vorteil, dass dadurch sichergestellt wird, dass im erwähnten Freiraum ein ausreichend hoher Schmiermittelpegel anliegt. Es ist aber auch möglich, die Schmiermittelabsaugung im unteren Bereich oder einem seitlichen Bereich des Walzenhebelmoduls vorzusehen.A lubricant suction device can be provided at the upper end of the roller lever module. In particular when using hydrostatic bearings, which ideally have a continuous supply of lubricant, it is necessary to drain the supplied lubricant again. The arrangement of the lubricant suction in the upper end area of the roller lever module has the advantage that it ensures that a sufficiently high level of lubricant is present in the free space mentioned. However, it is also possible to provide for the lubricant suction in the lower area or in a lateral area of the roller lever module.

Ein besonders sicherer Betrieb des Walzenhebelmoduls kann erreicht werden, wenn im Freiraum im Wesentlichen Umgebungsdruck herrscht. Dies bedeutet, dass das Schmiermittel, welches sich in dem Freiraum befindet, nicht unter Druck steht, sondern lediglich durchgepumpt wird und an der zum Beispiel im oberen Bereich angeordneten Schmiermittelabsaugung mit dem selben Volumen pro Zeiteinheit abgesaugt wird, wie es, insbesondere im Bereich der hydrostatischen Lager, zugeführt wird.A particularly reliable operation of the roller lever module can be achieved if the pressure in the free space is essentially ambient. This means that the lubricant in the free space is not under pressure, but is merely pumped through and sucked off at the lubricant suction device arranged in the upper area, for example, with the same volume per unit of time as it is, especially in the area of the hydrostatic Stock, is supplied.

Eine Abdichtung des Freiraums des Walzenhebelmoduls kann beispielsweise dadurch erreicht werden, dass eine Kolbenringdichtung im oberen und unteren Bereich vorgesehen ist.Sealing of the free space of the roller lever module can be achieved, for example, by providing a piston ring seal in the upper and lower area.

Bevorzugt ist der Walzenhebel, welcher die Achse der Mahlwalze aufweist, an der äußeren Hülse angebracht. Auch diese Art von Befestigung ermöglicht wiederum einen relativ kompakten Aufbau.The roller lever, which has the axis of the grinding roller, is preferably attached to the outer sleeve. This type of attachment also allows a relatively compact structure.

Um zusätzlichen Druck auf die Mahlwalze und somit das Mahlgut auszuüben, kann ein Hydraulikzylinder am Mahlwalzenhebel vorgesehen sein. Dieser ist bevorzugt mit einer Druck- beziehungsweise Zugrichtung im Wesentlichen parallel zum Zentralkörper beziehungsweise der Führungsachse der Führ-und Lagereinheit ausgerichtet.In order to exert additional pressure on the grinding roller and thus on the material to be ground, a hydraulic cylinder can be provided on the grinding roller lever. This is preferably aligned with a push or pull direction essentially parallel to the central body or the guide axis of the guiding and bearing unit.

Bevorzugt wird das erfindungsgemäße Mahlwalzenhebelmodul in einer Wälzmühle mit einem Mahlteller und darauf abrollenden Mahlwalzen eingesetzt. Hierbei wird pro Mahlwalze ein Mahlwalzenhebelmodul vorgesehen. Grundsätzlich kann das Walzenhebelmodul auch als Mahlwalzenhebelmodul bezeichnet werden.The grinding roller lever module according to the invention is preferably used in a roller mill with a grinding table and grinding rollers rolling on it. Here, per Grinding roller provided a grinding roller lever module. In principle, the roller lever module can also be referred to as a grinding roller lever module.

Durch die kompakte Bauweise der erfindungsgemäßen Mahlwalzenhebelmodule ist es möglich, zwei Mahlwalzenhebelmodule auf einem gemeinsamen Ständer, welcher beispielsweise aus Beton ausgeführt sein kann, vorzusehen. Dies ermöglicht wiederum einen relativ kompakten Aufbau, um die Wälzmühle herum, so dass genug Raum für weitere, für den Betrieb nötige, Einrichtungen verbleibt.Due to the compact design of the grinding roller lever modules according to the invention, it is possible to provide two grinding roller lever modules on a common stand, which can be made of concrete, for example. This in turn allows for a relatively compact structure around the roller mill, so that there is enough space for other devices required for operation.

Die Erfindung wird nachfolgend anhand eines schematischen Ausführungsbeispiels unter Bezugnahme auf die beiliegenden Figuren näher erläutert. Hierbei zeigen:

Figur 1
die Grundkomponenten einer Wälzmühle mit sechs erfindungsgemäßen Walzenhebelmodulen;
Figur 2
eine Ansicht auf einen Ständer mit zwei erfindungsgemäßen Walzenhebelmodulen;
Figur 3
einen Schnitt durch ein erfindungsgemäßes Walzenhebelmodul;
Figur 4
eine perspektivische Ansicht einer Lagerhülse eines hydrostatischen Lagers; und
Figur 5
eine Aufsicht auf eine Lagerhülse des hydrostatischen Lagers.
The invention is explained in more detail below using a schematic exemplary embodiment with reference to the accompanying figures. Here show:
figure 1
the basic components of a roller mill with six roller lever modules according to the invention;
figure 2
a view of a stand with two roller lever modules according to the invention;
figure 3
a section through a roller lever module according to the invention;
figure 4
a perspective view of a bearing sleeve of a hydrostatic bearing; and
figure 5
a top view of a bearing sleeve of the hydrostatic bearing.

In Figur 1 ist eine vereinfachte Darstellung einer Wälzmühle ohne Gehäuse und Sichter sowie ohne weiteren für die Erfindung nicht wesentlichen Komponenten dargestellt.In figure 1 is a simplified representation of a roller mill without a housing and classifier and without other components that are not essential to the invention.

Um einen zentral angeordneten Mahlteller 101 sind hier drei Ständer 102 vorgesehen. Auf jedem dieser Ständer 102 befinden sich in einem jeweiligen Lagerbock 30 zwei erfindungsgemäße Walzenhebelmodule 1, welches auch als Walzenlagermodul bezeichnet werden kann. Es ist aber auch eine Ausführung möglich, bei der jeweils ein Lagerbock für jedes Walzenhebelmodule vorgesehen ist. Der dezidierte Lagerbock, kann dann mit einem zweiten Lagenbock auf einem gemeinsamen Ständer vorgesehen sein, aber auch auf jeweils auf einem separaten Ständer.Three stands 102 are provided here around a centrally arranged grinding table 101 . On each of these stands 102 there are two roller lever modules 1 according to the invention in a respective bearing block 30, which can also be referred to as a roller bearing module. However, an embodiment is also possible in which a bearing block is provided for each roller lever module. The dedicated bearing block can then be provided with a second bearing block on a common stand, but also on a separate stand in each case.

Ein Walzenhebelmodul 1 besteht im Wesentlichen aus einem Walzenhebel 3 sowie einer Führ- und Lagereinheit 20. Am mahltellerseitigen Ende des Walzenhebels 3 ist eine Mahlwalze 10 vorgesehen. Diese ist mit einer Achse, welche innerhalb des Walzenhebels 3 verläuft, drehfest verbunden. In der hier dargestellten Form ist der Mahlteller 101 lediglich als Ring dargestellt. In einer nicht vereinfachten Darstellung einer Wälzmühle ist er meist eine im Wesentlichen kreisförmige Scheibe.A roller lever module 1 consists essentially of a roller lever 3 and a guide and bearing unit 20. A grinding roller 10 is provided at the end of the roller lever 3 on the grinding plate side. This is non-rotatably connected to an axis which runs within the roller lever 3 . In the form shown here, the grinding table 101 is only shown as a ring. In a non-simplified representation of a roller mill, it is usually an essentially circular disk.

Im Betrieb wird der Mahlteller 101 in Rotation versetzt. Hierdurch wird auf ihn aufgegebenes Mahlgut über Fliehkräfte bzw. Zentrifugalkräfte nach außen zu den Mahlwalzen 10 transportiert. Das unter die Mahlwalzen 10 transportierte Mahlgut wird zum einen durch den Druck, welchen die Mahlwalzen 10 auf das Mahlgut ausüben, zerkleinert. Zum anderen sorgt der Kontakt mit dem Mahlgut dafür, dass sich die Mahlwalzen 10 um ihre Achse drehen.During operation, the grinding table 101 is set in rotation. As a result, material to be ground is transported outwards to the grinding rollers 10 by means of centrifugal forces. The material to be ground which is transported under the grinding rollers 10 is comminuted on the one hand by the pressure which the grinding rollers 10 exert on the material to be ground. On the other hand, the contact with the material to be ground ensures that the grinding rollers 10 rotate about their axis.

Eine vergrößerte Darstellung eines Ständers 102 mit zwei Walzenhebelmodulen 1 ist in Fig. 2 dargestellt. Jedes Walzenhebelmodul 1 weist seinen eigenen Lagerbock 30 auf. In diesem ist die Führ- und Lagereinheit 20 jedes Walzenmoduls 1 eingepasst.An enlarged representation of a stand 102 with two roller lever modules 1 is shown in 2 shown. Each roller lever module 1 has its own bearing block 30 . The guiding and bearing unit 20 of each roller module 1 is fitted into this.

Mittels der Führ- und Lagereinheit 20, an der der Walzenhebel 3 befestigt ist, ist eine Linearbewegung der Mahlwalze 10 senkrecht zum Mahlteller 101 möglich. Der detaillierte Aufbau der Führ- und Lagereinheit 20 wird nachfolgend unter Bezugnahme auf die Fig. 3 näher beschrieben.A linear movement of the grinding roller 10 perpendicular to the grinding table 101 is possible by means of the guide and bearing unit 20, to which the roller lever 3 is fastened. The detailed structure of the guiding and storage unit 20 is described below with reference to FIG 3 described in more detail.

Zwischen dem Ständer 102 und dem Walzenhebel 3 ist ein Hydraulikzylinder 5 vorgesehen. Dieser dient dazu, die Kraft, die mittels der Mahlwalze 10 auf das Mahlbett auf dem Mahlteller 101 aufgebracht wird, zu variieren. Zieht der Hydraulikzylinder 5, so wird diese Kraft erhöht, drückt er, so kann die Kraft verringert werden. Detaillierter führt ein Erhöhen des Hydraulikdruckes auf der Kolbenstangenseite zu einer höheren Zugkraft an der Kolbenstange. Ein Absenken des kolbenstangenseitigen Hydraulikdruckes führt zu einer Kraftverringerung, ebenso wie ein erhöhen des Hydraulikdruckes in der kolbenseitigen Zylinderkammer, welche in dieser Abbildung unten liegt. Dies führt bis hin zum Abheben der Walzen, wenn Druckkraft größer als Gewichtskraft des bewegten Systems ist.A hydraulic cylinder 5 is provided between the stand 102 and the roller lever 3 . This serves to vary the force that is applied to the grinding bed on the grinding table 101 by means of the grinding roller 10 . If the hydraulic cylinder 5 pulls, this force is increased; if it presses, the force can be reduced. In more detail, increasing the hydraulic pressure on the piston rod side results in a higher pulling force on the piston rod. Decreasing the hydraulic pressure on the piston rod side results in a reduction in force, as does increasing the hydraulic pressure in the piston-side cylinder chamber, which is at the bottom in this figure. This can even lead to the rollers being lifted off if the compressive force is greater than the weight of the moving system.

In Fig. 3 ist eine geschnittene Ansicht einer Führ- und Lagereinheit 20 eines erfindungsgemäßen Walzenhebelmoduls 1 dargestellt. Im Inneren der Führ- und Lagereinheit 20 erstreckt sich ein Zentralkörper 22, welcher zylinderförmig ausgebildet ist. Um den Zentralkörper 22 herum ist eine innere Hülse 25 vorgesehen. Diese ist bevorzugt drehfest mit dem Zentralkörper 22 verbunden. Um die innere Hülse 25 wiederum ist eine äußere Hülse 24 angeordnet. An der Außenseite der inneren Hülse 25 sowie der Innenseite der äußeren Hülse 24 sind Teile einer Bogenzahnkupplung 31 ausgebildet, die zur Übertragung eines Drehmomentes vom Walzenhebel 3 dienen. Die äußere Hülse 24 ist bevorzugt linear verschiebbar in Achsrichtung des Zentralkörpers 22 angebracht.In 3 a sectional view of a guiding and bearing unit 20 of a roller lever module 1 according to the invention is shown. Inside the guide and storage unit 20 extends a central body 22, which is cylindrical. An inner sleeve 25 is provided around the central body 22 . This is preferably non-rotatably connected to the central body 22 . An outer sleeve 24 is in turn arranged around the inner sleeve 25 . On the outside of the inner sleeve 25 and on the inside of the outer sleeve 24 are parts of a curved tooth coupling 31 which are used to transmit a torque from the roller lever 3 . The outer sleeve 24 is preferably attached in a linearly displaceable manner in the axial direction of the central body 22 .

Wie in Fig. 3 dargestellt, sind größere Bereiche der Bogenzahnkupplung 31 an der fest am Zentralkörper 22 vorgesehenen inneren Hülse 25 ausgebildet. Kleinere Teile, die in die Bereiche an der inneren Hülse 25 eingreifen, insbesondere einkämmen, sind an der äußeren Hülse 24 vorgesehen. Bei einer Linearverschiebung der äußeren Hülse 24 bewegen sich diese Teile innerhalb der Teile, welche an der inneren Hülse 25 vorgesehen sind, so dass eine Kraft- beziehungsweise eine Drehmomentübertragung weiterhin möglich ist.As in 3 shown, larger portions of the curved tooth coupling 31 are formed on the inner sleeve 25 provided fixed to the central body 22 . Smaller parts that engage, in particular mesh, with the areas on the inner sleeve 25 are provided on the outer sleeve 24 . With a linear displacement of the outer sleeve 24, these parts move within the parts that are provided on the inner sleeve 25, so that a power or torque transmission is still possible.

Im unteren und oberen Bereich der Führ- und Lagereinheit 20 ist jeweils ein hydrostatisches Lager 26, 28 angeordnet. Dieses erstreckt sich zwischen der äußeren 24 und der inneren Hülse 25. Am Kontaktbereich zwischen der äußeren Hülse 24 und der inneren Hülse 25 ist eine Absaugstelle 36 vorgesehen, an der die für die hydrostatischen Lager 28 eingebrachten Schmiermittel wieder abgesaugt werden können.A hydrostatic bearing 26 , 28 is arranged in each case in the lower and upper area of the guiding and bearing unit 20 . This extends between the outer 24 and the inner sleeve 25. At the contact area between the outer sleeve 24 and the inner sleeve 25, a suction point 36 is provided, at which the lubricant introduced for the hydrostatic bearing 28 can be sucked off again.

Am unteren Kontaktpunkt zwischen der äußeren Hülse 24 und der inneren Hülse 25 ist eine Dichtung, beispielsweise eine Kolbenringdichtung 34, vorgesehen, um den Freiraum 27 zwischen den Hülse 24, 25 abzudichten, so dass das Schmiermittel nur über die Absaugstelle 36 entfernt werden kann. Auch am oberen Kontaktpunkt beziehungsweise an der Kontaktfläche zwischen der äußeren Hülse 24 und der inneren Hülse 25 kann eine ähnliche Dichtung vorgesehen sein.A seal, for example a piston ring seal 34, is provided at the lower contact point between the outer sleeve 24 and the inner sleeve 25 in order to seal the clearance 27 between the sleeves 24, 25 so that the lubricant can only be removed via the suction point 36. A similar seal can also be provided at the upper contact point or at the contact surface between the outer sleeve 24 and the inner sleeve 25 .

Der Walzenhebel 3 selbst ist an der äußeren Hülse 24 befestigt.The roller lever 3 itself is attached to the outer sleeve 24 .

Mittels der hydrostatischen Lager 26, 28 und der Bogenzahnkupplung 31 ist es möglich, dass sich der Walzenhebel 3 entlang der zentralen Achse des Zentralkörpers 22 und der inneren Hülse 25 nach oben und unten bewegen kann.By means of the hydrostatic bearings 26, 28 and the curved tooth clutch 31, it is possible for the roller lever 3 to move up and down along the central axis of the central body 22 and the inner sleeve 25.

In den Figuren 4 und 5 wird auf den Aufbau eines hydrostatischen Lagers 26, 28 genauer eingegangen. Dieses besteht im Wesentlichen aus einer Lagerhülse 42. Die Lagerhülse 42 weist einen Innendurchmesser auf, der im Wesentlichen dem Außendurchmesser der inneren Hülse 25 entspricht. In der Lagerhülse 42 sind sich radial erstreckende Schmiermittelzuführungen 44 vorgesehen. Axial ausgebildete Schmiermittelrückläufe 46 dienen dazu, das über die Schmiermittelzuführungen 44 zugeführte Schmiermittel wieder ablaufen zu lassen. Wie insbesondere in Fig. 4 gezeigt, sind zwischen den Schmiermittelrückläufen 46 Drucktaschen 48 vorgesehen, in denen sich während des Betriebes idealerweise Schmiermittel befindet, so dass die Lager- und Führwirkung der hydrostatischen Lager 26, 28 vorhanden ist.In the Figures 4 and 5 the structure of a hydrostatic bearing 26, 28 is discussed in more detail. This consists essentially of a bearing sleeve 42. The bearing sleeve 42 has an inner diameter which essentially corresponds to the outer diameter of the inner sleeve 25. Radially extending lubricant feeds 44 are provided in the bearing sleeve 42 . Axially designed lubricant return lines 46 serve to allow the lubricant supplied via the lubricant supply lines 44 to run off again. As in particular in 4 shown, pressure pockets 48 are provided between the lubricant returns 46, in which ideally lubricant is located during operation, so that the bearing and guiding effect of the hydrostatic bearings 26, 28 is present.

Im Freiraum 27 zwischen der inneren Hülse 25 und der äußeren Hülse 24 befindet sich Schmiermittel, welches über die Schmiermittelzuführkanäle 44 der hydrostatischen Lager 26, 28 zugeführt wird. Dieses Schmiermittel hat eine dämpfende Wirkung auf Vibrationen, die eine Auf- und Abbewegung der Walzenhebel 3 verursachen. Dies bedeutet, dass mit dem erfindungsgemäßen Walzenhebelmodul 1 eine Wälzmühle einen ruhigeren Lauf hat und somit effizienter betrieben werden kann.Lubricant is located in the free space 27 between the inner sleeve 25 and the outer sleeve 24 and is supplied to the hydrostatic bearings 26 , 28 via the lubricant supply channels 44 . This lubricant has a dampening effect on vibrations that cause the roller levers 3 to move up and down. This means that with the roller lever module 1 according to the invention, a roller mill runs more smoothly and can therefore be operated more efficiently.

Claims (15)

  1. Roller lever module (1) for a grinding roller (10) of a roller mill, which comprises a rotating grinding table (101) and grinding rollers (10) rolling thereon,
    with a roller lever (3), at the end of which on the grinding table side a grinding roller (10) can be attached,
    a guide and support unit (20), with a guide axis,
    wherein the roller lever (3) is coupled by its side facing away from the grinding table to the guide and support unit (20),
    wherein the guide and support unit (20) is formed as a linear guide for moving the roller lever (3) axially along the guide axis,
    characterized in that
    the guide and support unit (20) comprises a central body (22) that is elongated in the direction of the guide axis,
    that an outer sleeve (24) enclosing the central body (22) is provided, which sleeve is arranged movably in the direction of the guide axis,
    that at least one linear guide bearing is provided between the outer sleeve (24) and the central body (22),
    that a unit is provided between the outer sleeve (24) and the central body (22) for transmitting a torque from the roller lever (3) to the central body (22).
  2. Roller lever module (1) according to claim 1,
    characterized in that
    the at least one linear guide bearing is formed as a hydrostatic bearing (26, 28).
  3. Roller lever module (1) according to claim 1 or 2,
    characterized in that
    at least a first (28) and a second (26) linear guide bearing are provided, wherein the first (28) linear guide bearing is arranged in the upper region of the central body (22) and the second (26) linear guide bearing is arranged in the lower region of the central guide body (22).
  4. Roller lever module (1) according to any one of claims 1 to 3, characterized in that
    the unit for transmitting a torque is formed as a curved-tooth coupling (31).
  5. Roller lever module (1) according to any one of claims 1 to 4,
    characterized in that
    an inner sleeve (25) enclosing the central body (22) is provided, which sleeve is arranged in a torque-proof manner on the central body (22).
  6. Roller lever module (1) according to claim 5,
    characterized in that
    the outer sleeve (24) and the inner sleeve (25) form the curved-tooth coupling (31) at least partially.
  7. Roller lever module (1) according to any one of claims 2 to 6,
    characterized in that
    the at least one linear guide bearing, which is formed as a hydrostatic bearing (26, 28), comprises a bearing bushing (42), which has substantially an inner diameter that corresponds to the outer diameter of the central body (22) or the inner sleeve (25),
    that the bearing bushing (42) comprises radial lubricant supply ducts (44), that the bearing bushing (42) comprises axial lubricant return ducts (46), which extend substantially over the entire length of the bearing bushing (42) and that the bearing bushing (42) has pressure pockets (48) on the inside to receive lubricant at least temporarily.
  8. Roller lever module (1) according to any one of claims 1 to 7,
    characterized in that
    a free space (27) between the outer sleeve (24) and the central body (22) or a free space (27) between the outer sleeve (24) and the inner sleeve (25) is filled with a lubricant.
  9. Roller lever module (1) according to any one of claims 1 to 8,
    characterized in that
    a lubricant extraction facility (36) is provided at the upper end region of the roller lever module (1).
  10. Roller lever module (1) according to any one of claims 1 to 9, characterized in that
    substantially ambient pressure prevails in the free space (27).
  11. Roller lever module (1) according to any one of claims 1 to 10,
    characterized in that
    the outer sleeve (24) is sealed tightly with the central body (22), in particular by means of piston seals (34).
  12. Roller lever module (1) according to any one of claims 1 to 11, characterized in that
    the roller lever (3) is attached to the outer sleeve (24).
  13. Roller lever module (1) according to any one of claims 1 to 12, characterized in that
    a hydraulic cylinder (5) is provided on the roller lever (3).
  14. Roller mill with a grinding table (101) and grinding rollers (10) rolling thereon, characterized by
    at least one roller lever module (1) according to any one of claims 1 to 13.
  15. Roller mill according to claim 14,
    characterized in that
    two roller lever modules (1) are provided on a common stand (102), in particular a concrete stand.
EP19702026.6A 2019-01-17 2019-01-17 Roll lever module Active EP3727697B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2019/051184 WO2020098973A1 (en) 2019-01-17 2019-01-17 Roll lever module

Publications (2)

Publication Number Publication Date
EP3727697A1 EP3727697A1 (en) 2020-10-28
EP3727697B1 true EP3727697B1 (en) 2022-04-27

Family

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Country Status (5)

Country Link
EP (1) EP3727697B1 (en)
JP (1) JP7321153B2 (en)
CN (1) CN111712326B (en)
DK (1) DK3727697T3 (en)
WO (1) WO2020098973A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113558498B (en) * 2021-08-18 2022-09-06 苏州咖乐美咖啡机科技有限公司 Grinding device
JP2024024559A (en) * 2022-08-09 2024-02-22 川崎重工業株式会社 Maintenance method for vertical roller mill and reduction gear

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Publication number Priority date Publication date Assignee Title
GB186956A (en) * 1921-05-13 1922-10-13 Donald John Gunn Miller Improvements in grinding or crushing machines
GB508877A (en) * 1938-02-02 1939-07-07 H J & A Coulthurst Ltd Improvements in or relating to grinding mills of the edgerunner type
DE2703535C2 (en) * 1977-01-28 1986-07-10 Loesche GmbH, 4000 Düsseldorf Roller mill
JPS614547A (en) * 1984-06-16 1986-01-10 川崎重工業株式会社 Vertical type mill
JPS6351649U (en) * 1986-09-22 1988-04-07
DE3801728C2 (en) * 1988-01-21 1998-07-02 Krupp Polysius Ag Roller mill
JPH0716623B2 (en) * 1988-07-08 1995-03-01 石川島播磨重工業株式会社 Roller reduction mechanism for vertical roller mill
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Also Published As

Publication number Publication date
CN111712326B (en) 2023-02-03
JP7321153B2 (en) 2023-08-04
EP3727697A1 (en) 2020-10-28
DK3727697T3 (en) 2022-05-09
WO2020098973A1 (en) 2020-05-22
CN111712326A (en) 2020-09-25
JP2022522380A (en) 2022-04-19

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