EP4103328B1 - Roller mill with a synchronising device - Google Patents

Roller mill with a synchronising device Download PDF

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Publication number
EP4103328B1
EP4103328B1 EP21703285.3A EP21703285A EP4103328B1 EP 4103328 B1 EP4103328 B1 EP 4103328B1 EP 21703285 A EP21703285 A EP 21703285A EP 4103328 B1 EP4103328 B1 EP 4103328B1
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EP
European Patent Office
Prior art keywords
shaft
roller mill
coupling element
bearing unit
roller
Prior art date
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Application number
EP21703285.3A
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German (de)
French (fr)
Other versions
EP4103328C0 (en
EP4103328A1 (en
Inventor
Pedro Guerrero Palma
Alexander Peters
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thyssenkrupp Polysius GmbH
ThyssenKrupp AG
Original Assignee
Thyssenkrupp Polysius GmbH
ThyssenKrupp AG
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Publication date
Priority claimed from DE102020201892.8A external-priority patent/DE102020201892A1/en
Priority claimed from BE20205092A external-priority patent/BE1028057B1/en
Application filed by Thyssenkrupp Polysius GmbH, ThyssenKrupp AG filed Critical Thyssenkrupp Polysius GmbH
Publication of EP4103328A1 publication Critical patent/EP4103328A1/en
Application granted granted Critical
Publication of EP4103328C0 publication Critical patent/EP4103328C0/en
Publication of EP4103328B1 publication Critical patent/EP4103328B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/32—Adjusting, applying pressure to, or controlling the distance between, milling members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/02—Crushing or disintegrating by roller mills with two or more rollers

Definitions

  • the invention relates to a roller mill for comminuting bulk material, the roller mill having two grinding rollers which are connected to a synchronization device.
  • Roller mills are usually used to crush ground material such as limestone, clinker, ore or similar rocks.
  • a roller mill usually has two grinding rollers which are arranged parallel to one another and can rotate in opposite directions, with a grinding gap being formed between the grinding rollers for comminution of the material. From the DE 39 30 773 A1 A roller mill with a fixed and a loosely mounted grinding roller is known, with the loosely mounted roller being connected to hydraulic actuators.
  • a roller mill for comminuting bulk material comprises a first grinding roller and a second grinding roller, which are arranged opposite one another and can be driven in opposite directions, with a grinding gap being formed between the grinding rollers.
  • the roller mill also has a floating bearing unit for receiving the first grinding roller and a fixed bearing unit for receiving the second grinding roller, the floating bearing unit having two bearings, each of which receives one end of the first grinding roller.
  • a plurality of hydraulic actuators are attached to the floating bearing unit for applying a force to the floating bearing unit, and the bearings of the floating bearing unit are connected to one another via a synchronization device.
  • the synchronization device has a coupling element which prevents a relative movement of the bearings of the floating bearing unit in a coupling position and allows a relative movement of the bearings of the floating bearing unit in a free position.
  • the floating bearing unit has in particular two bearings, each of which accommodates one end of the first grinding roller.
  • Each grinding roller preferably has a roller base body and a roller shaft coaxial therewith, which protrudes from the roller base body in particular on the end faces thereof.
  • the roller shaft is accommodated at its opposite ends in a bearing of the floating bearing unit.
  • the bearings of the floating bearing unit are preferably movable, in particular in the radial direction, accommodated on a machine frame of the roller mill, with the bearings of the fixed bearing unit being firmly attached to the machine frame.
  • Each bearing preferably has a bearing block and a rolling bearing unit attached thereto with an outer and an inner bearing ring and rolling elements arranged between them. On.
  • the outer bearing ring is preferably firmly attached to the bearing stone.
  • the floating bearing unit and the fixed bearing unit each have two bearing stones, the bearing stones of the floating bearing unit being movably received on the machine frame and the bearing stones of the fixed bearing unit being fastened to the machine frame, so that the bearing stone is not movable relative to the machine frame.
  • the hydraulic actuator is an actuator that applies a force to the floating bearing unit and, for example, moves it.
  • a hydraulic actuator is preferably attached to each bearing block of the floating bearing unit.
  • the hydraulic actuator has, for example, a cylinder with a piston movably mounted therein, a movement of the piston resulting in a movement of the bearing stone or a change in the force acting on the bearing stone.
  • the synchronization device preferably has a rotatable shaft which is attached to the machine frame.
  • the shaft is mounted in particular so that it can rotate about its longitudinal axis.
  • a push rod is attached to each end of the shaft, for example via a lever, the lever extending at an angle of approximately 60 - 120°, preferably 90°, to the respective push rod.
  • the push rod is each connected to a bearing, in particular the bearing block, of the floating bearing unit.
  • the push rod is attached to the respective bearing via the coupling element in such a way that the push rod and the bearing can be moved to a limited extent relative to one another.
  • the bearing can be moved in the horizontal direction, preferably in the extension direction of the push rod, in the machine frame by a certain amount, in particular a path difference.
  • the connection of the push rod with the respective bearing preferably has play, so that the push rod and the bearing can be moved relative to one another by a certain amount, in particular a distance.
  • the push rod and the bearing can only be moved linearly relative to one another in the direction of extension of the push rod.
  • the movement of the push rod and the bearing are preferably coupled, so that the coupling element is in the coupling position when a certain path difference between the bearing and the push rod is exceeded.
  • the coupling element In the coupling position of the coupling element, a relative movement of the bearings in at least one direction, preferably in the radial direction of the grinding roller, in particular in the direction of increasing the misalignment, is prevented.
  • the coupling element has two coupling positions, with the coupling element moving from the first coupling position via the free position to the second Coupling position is movable.
  • the coupling element is preferably designed such that it couples the bearing with the respective push rod when the relative movement of the bearings of the floating bearing unit, preferably a bearing and the push rod, exceeds a predetermined travel limit.
  • the travel limit value is preferably a clearance of approximately ⁇ 1mm to ⁇ 20mm, preferably ⁇ 5mm, whereby the travel limit value is in particular a deviation of the position of the bearing relative to a zero position which corresponds to the desired size of the grinding gap. If the relative movement exceeds the travel limit value, the coupling element is in the coupling position and couples the movement of the bearings of the floating bearing unit, preferably the push rod with the respective bearing, so that they are firmly connected to one another and no relative movement in the respective direction of movement is possible. Coupling means, for example, the synchronization of the bearings. In the free position, a maximum relative movement of the bearings corresponding to the travel limit is possible.
  • the roller mill When the roller mill is in operation, if the grinding roller is unevenly loaded, the grinding rollers become misaligned, with at least one bearing of the floating bearing unit being moved in the radial direction. If this radial movement exceeds the amount of play between the coupling positions of the coupling element, the respective bearing and the push rod connected to it, the push rod is moved in the radial direction and rotates the shaft of the synchronization device via the lever. A rotation of the shaft results in a movement of the second push rod and a corresponding movement of the bearing of the floating bearing unit connected to it.
  • a play between the push rods and the floating bearing unit enables a predetermined amount of relative movement of the push rod and the bearing, so that a certain misalignment of the grinding rollers is enabled but limited, so that damage to the grinding rollers caused by excessive misalignment is prevented.
  • the play is preferably formed in the horizontal direction, in particular in the direction of the grinding force or the direction of extension of the push rod.
  • the play is, for example, ⁇ 1mm to ⁇ 20mm, preferably ⁇ 5mm.
  • the synchronization device has a rotatable shaft and at least two push rods, the push rods each having one end connected to the shaft and the other end being connected to the floating bearing unit, the push rods and/or the shaft having the coupling element.
  • the hydraulic actuator is preferably attached directly to the respective bearing.
  • the synchronization device comprises a rotatable shaft and at least two push rods, the push rods each having one end connected to the shaft and the other end each being connected to a bearing of the floating bearing unit, the push rods each being connected to the respective one via a coupling element Bearings of the floating bearing unit and / or the shaft are connected.
  • each bearing of the floating bearing unit is connected to at least one hydraulic actuator and a push rod, with the connection of the bearing to the respective push rod having a coupling unit.
  • the coupling element comprises a linear guide.
  • the linear guide is preferably designed in such a way that it allows a relative movement of the push rod and the bearing in the direction of the grinding force or the extension of the push rod and prevents it in directions deviating therefrom.
  • the linear guide has at least one stop to limit the relative movement of the bearing to the push rod.
  • the coupling element is at least partially formed in the push rod, each push rod having at least one coupling element.
  • the coupling element is formed in an end region of the push rod, preferably in the end region that faces the bearing.
  • the coupling element comprises a hydraulic actuator, preferably with a hydraulic cylinder in which a piston is arranged which separates two hydraulic chambers from one another.
  • an end region of the push rod is designed as a hydraulic cylinder.
  • the roller mill has two coupling elements that are hydraulically connected to one another.
  • each coupling unit is attached to a push rod.
  • the hydraulic chambers of the respective coupling elements are connected to one another.
  • a hydraulic connection of the coupling elements ensures uniform movement of the two coupling elements.
  • the hydraulic connection of the coupling elements optionally includes a throttling element, such as a throttle valve, for throttling, preferably limiting, the relative speeds of the push rods, in particular the grinding rollers.
  • the coupling element comprises a hollow cylinder which is formed in an end region of the push rod.
  • the push rods are each attached to the respective bearing of the floating bearing unit by means of a fastening element, the fastening element being fastened to the floating bearing unit and being connected to the respective push rod so as to be movable relative to one another.
  • the fastening element comprises, for example, a piston which is slidably arranged within the hollow cylinder formed in the push rod.
  • the hollow cylinder preferably forms a stop for limiting the relative movement of the bearing to the push rod. The play is determined in particular by the piston stroke, preferably the length of the hollow cylinder.
  • the shaft has a first shaft section and a second shaft section, which are connected to one another via the coupling element.
  • the coupling element is designed as a claw clutch.
  • a coupling element designed as a claw coupling preferably comprises a coupling shaft and a hollow shaft arranged around it and concentrically thereto, the coupling shaft being firmly connected to one shaft section and the hollow shaft to the other shaft section.
  • the hollow shaft and the coupling shaft preferably have connecting elements which cooperate in a coupling position, so that a relative movement of the coupling shaft and the hollow shaft is prevented and in a free position allow a relative movement of the coupling shaft and the hollow shaft.
  • the connecting elements include, for example, projections arranged circumferentially on the coupling shaft, which are arranged in the hollow shaft on the inner circumference Recesses work together.
  • the recesses are preferably larger than the projections, so that a certain relative rotation of the coupling shaft and the hollow shaft is possible.
  • each damper unit is designed in particular as a single-acting hydraulic cylinder and each has a cylinder with a piston that separates a gas chamber from a hydraulic chamber and is movable within the cylinder.
  • the gas chamber is preferably filled with a compressible gas, such as nitrogen, wherein the hydraulic chamber is filled with a non-compressible hydraulic oil and is connected to the respective hydraulic line, so that hydraulic oil can flow from the respective hydraulic line into the hydraulic chamber.
  • the damper unit serves as a damper for the hydraulic actuators and preferably generates the force.
  • Fig. 1 shows a roller mill 10 with a first grinding roller 12 and a second grinding roller 14, the grinding rollers 12, 14 being arranged opposite one another and being rotatable in opposite directions.
  • a grinding gap 16 is formed between the grinding rollers 12, 14.
  • the grinding rollers 12, 14 each have a substantially cylindrical roller base body 18, 20 and a drive shaft 22, 24 arranged coaxially thereto, the ends of which preferably extend in the axial direction beyond the respective roller base body 18, 20.
  • Each of the grinding rollers 12, 14 is accommodated in a storage unit, the storage units being located, for example, on an in Fig. 1 support the machine frame 29, which is not completely shown.
  • the first grinding roller 12 is accommodated in a floating bearing unit 26, with the second grinding roller 14 being accommodated in a fixed bearing unit 28.
  • the fixed bearing unit 28 comprises two bearings 30, 32, which are each arranged at opposite roller ends and accommodate the drive shaft 24.
  • the bearings 30, 32 are firmly attached to the machine frame 29, so that they absorb forces, particularly in the axial and radial directions of the grinding roller 14, and are not movable.
  • the floating bearing unit 26 includes two bearings 34, 36, each of which accommodates one end of the drive shaft 22 of the first grinding roller 12.
  • the bearings 34, 36 of the floating bearing unit 26 are accommodated on the machine frame 29 in such a way that they can be moved linearly, in particular horizontally, preferably in a sliding manner.
  • the bearings 34, 36 are preferably firmly attached in the axial direction of the first grinding roller 12.
  • the bearings 34, 36 of the floating bearing unit 26 are each mounted movably in the radial direction of the grinding rollers 12, 14 and are each connected to one, preferably two, hydraulic actuators 38, 40.
  • the hydraulic actuators 38, 40 each serve to apply a grinding force in the direction of the second grinding roller 14 to the first grinding roller 12, which is mounted in the floating bearing unit 26.
  • the grinding force is preferably aligned in a direction orthogonal to the feeding of the material into the grinding gap 16, in particular the grinding force runs in a horizontal direction.
  • the floating bearing unit 26 can be moved in particular in the direction of the grinding force applied by the hydraulic actuators 38, 40.
  • the hydraulic actuators 38, 40 are each supported with one end on a bearing 34, 36 and with their opposite other end on the machine frame 29. A movement of the respective bearing 34, 36 of Floating bearing unit 26 results in a corresponding movement of the hydraulic actuator 38, 40 attached to it.
  • Each hydraulic actuator 38, 40 preferably has a cylinder and a piston movably mounted therein, the movement of the hydraulic actuator being understood to mean, for example, a movement of the piston within the cylinder .
  • the roller mill 10 also has a synchronization device 42.
  • the synchronization device 42 serves to couple, in particular to synchronize, the movement of the bearings 34, 36 of the floating bearing unit 26, so that the bearings 34, 36 move synchronously and in particular to avoid misalignment of the grinding roller 12, 14, in which they are not aligned parallel to one another , avoided or preferably limited.
  • the synchronization device 42 has a shaft 44, at the ends of which a lever 46, 48 is attached, which extends in the radial direction of the shaft 44.
  • the shaft 44 is, for example, attached to the machine frame 29 via two fastening means 50, 52, the shaft 44 being rotatably connected to the fastening means 50, 52, for example by means of respective bearings, so that the shaft 44 rotates about its central longitudinal axis relative to the fastening means 50, 52 is rotatable.
  • a push rod 54, 56 is attached to the levers 46, 48, each of which is connected to a bearing 34, 36 of the floating bearing unit 26.
  • the push rods 54, 56 are preferably each attached to the housing of the respective bearing 34, 36.
  • the push rods 54, 56 of the synchronization device 44 are in particular attached to the bearings 34, 36 of the floating bearing unit 26 in such a way that the bearings 24, 36 and the respective push rod 54, 56 are relative to one another, preferably in the direction of the grinding force or in the direction of extension of the push rods 54. 56, are movable.
  • the push rods 54, 56 are each connected to the respective bearing 34, 36 via a fastening element 58, 60, the push rod 54, 56 having one end on the respective lever 46, 48 and the other end on the fastening element 58. 60 is attached.
  • the fastening elements 58, 60 and the push rods 54, 56 are connected to one another in such a way that they are movable relative to one another.
  • a coupling element 62, 64 which serves to couple the fastening element 58, 60 to the push rod 54, 56.
  • the coupling element 62, 64 is, for example, a linear guide that only has a linear movement, preferably in the direction of the grinding force, in a radial direction Direction of the grinding rollers 12, 14 or the direction of extension of the push rod 54, 56 allows.
  • the coupling element 62, 64 comprises a hollow cylinder which is formed in an end region of the push rod 54, 56.
  • a piston is arranged within the hollow cylinder and forms an end region of the fastening element 60.
  • the piston is slidably arranged within the hollow cylinder.
  • the hollow cylinder and the piston are designed such that the piston stroke is approximately 1mm to 20mm, preferably 10mm.
  • the coupling element 62, 64 shown is in a coupling position in which the relative movement of the push rods 54, 56, in particular the grinding rollers 12, 14, is prevented in at least one direction, namely in the direction of increasing the misalignment.
  • the hydraulic actuators 38, 40 attached to the bearings 34, 36 are optionally each connected to a damper unit 66, 68 for optionally generating the grinding force.
  • the damper units 66, 68 are each connected to the hydraulic actuators 38, 40 via one of the hydraulic lines.
  • the damper units 66, 68 are preferably designed to be essentially identical.
  • Each damper unit 66, 68 is designed in particular as a single-acting hydraulic cylinder and each has a cylinder with a piston 74, 80 which separates a gas chamber 70, 76 from a hydraulic chamber 72, 78 and is movable within the cylinder.
  • the gas chamber 70, 76 is preferably filled with a compressible gas, such as nitrogen, wherein the hydraulic chamber 72, 78 is filled with a non-compressible hydraulic oil and is connected to the respective hydraulic line, so that hydraulic oil from the respective hydraulic line into the hydraulic chamber 72, 78 is flowable.
  • the damper unit 66, 68 serves as a spring for the hydraulic actuators 38, 40.
  • the hydraulic actuators 38, 40 are initially each subjected to the same hydraulic pressure. If the grinding rollers 12, 14 are misaligned, which can be caused, for example, by uneven loading of the grinding rollers in the grinding process, one of the bearings 34, 36 of the floating bearing unit moves away from the grinding gap 16, so that the bearing 34 with the respective bearing 34 or 36 connected hydraulic cylinders 38 or 40 can be moved with the bearing 34, 36. A movement of at least one of the bearings 34, 36 results in a movement of the fastening element 50, 52 connected to the bearing 34, 36 relative to the respective push rod 54, 56. If the relative movement exceeds the piston stroke in the respective coupling element 62, 64, this results in a movement of the respective push rod 54, 56.
  • Each push rod 54, 56 is connected to the shaft 44 via a radial lift 46, 48, so that movement of a push rod 54, 56 results in a rotation of the shaft 44, thereby changing the movements of the push rods 54, 56 are coupled. This means that misalignment of the grinding rollers 12, 14 relative to one another is enabled and limited.
  • Such a limited misalignment prevents damage to the grinding roller, in particular preventing damage to edge elements attached to the roller ends.
  • the hydraulic pressure is automatically regulated back to the initial value by the damper unit 66, 68 and the hydraulic actuators 38, 40.
  • Fig. 2 shows a further exemplary embodiment of a roller mill 10 with a synchronization device 42, the same elements being provided with the same reference numerals.
  • the roller mill 10 of Fig. 2 in contrast to the roller mill of the exemplary embodiment Fig. 1 an alternative coupling element 62, 64.
  • the coupling element 62, 64 of Fig. 2 each include a hydraulic actuator with two hydraulic chambers that are separated from each other by a piston.
  • the hydraulic chambers of the coupling unit 62, 64 are preferably filled with an incompressible hydraulic oil.
  • the piston is preferably formed at one end of the fastening element 58, 60.
  • the roller mill 10 preferably has two coupling elements 62, 64, each of which is arranged to couple one of the push rods 54, 56 to one of the bearings 34, 36 of the floating bearing unit 26.
  • the coupling elements 62, 64 are, for example, connected to one another via hydraulic lines, with each hydraulic chamber of a coupling unit 62, 64 being connected to the corresponding hydraulic chamber of the other coupling element 62, 64 via a hydraulic line, so that a movement of one of the pistons at one Misalignment of the grinding rollers 12, 14 results in the opposite movement of the other piston, with a misalignment of the grinding rollers 12, 14 being permitted and limited to the piston stroke.
  • the coupling elements 62, 64 designed as hydraulic actuators are not connected to one another via a hydraulic line, but rather to an additional biasing element (not shown), such as a hydraulic cylinder.
  • the preload element applies a preload force to the respective hydraulic cylinder.
  • Fig. 3 shows a further exemplary embodiment of a roller mill 10 with a synchronization device 42, the same elements being provided with the same reference numerals.
  • the roller mill 10 of Fig. 3 in contrast to the roller mill of the exemplary embodiment Fig. 2 an alternative coupling element 82 which is arranged in the shaft 44.
  • the shaft 44 has, for example, two shaft sections that are connected to one another via the coupling element 82.
  • the coupling element 82 is designed in particular as a claw coupling, which has an inner coupling shaft 84 and an outer hollow shaft 86 arranged concentrically thereto.
  • the coupling shaft 84 has, for example, projections on its outer circumference, which cooperate with recesses in the inner circumference of the hollow shaft 86.
  • the recesses are larger than the projections, so that a game is formed between them and rotation relative to one another by a certain angle is made possible.
  • the inner coupling shaft 84 is connected to one section of the shaft 44 and the outer hollow shaft 86 is connected to the other section of the shaft 44, so that a certain relative rotation of the shaft sections is permitted in order to allow a certain misalignment of the grinding rollers 12, 14.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Disintegrating Or Milling (AREA)

Description

Die Erfindung betrifft eine Walzenmühle zum Zerkleinern von Schüttgut, wobei die Walzenmühle zwei Mahlwalzen aufweist, die mit einer Gleichlaufeinrichtung in Verbindung stehen.The invention relates to a roller mill for comminuting bulk material, the roller mill having two grinding rollers which are connected to a synchronization device.

Walzenmühlen werden üblicherweise zur Zerkleinerung von Mahlgut, wie beispielsweise Kalkstein, Klinker, Erz oder ähnliche Gesteine eingesetzt. Eine Walzenmühle weist üblicherweise zwei Mahlwalzen auf, die parallel zueinander angeordnet und gegenläufig rotierbar sind, wobei zwischen den Mahlwalzen ein Mahlspalt zur Zerkleinerung des Materials ausgebildet ist. Aus der DE 39 30 773 A1 ist eine Walzenmühle mit einem fest- und einer losgelagerten Mahlwalze bekannt, wobei die losgelagerte Walze jeweils mit Hydraulikaktuatoren verbunden sind.Roller mills are usually used to crush ground material such as limestone, clinker, ore or similar rocks. A roller mill usually has two grinding rollers which are arranged parallel to one another and can rotate in opposite directions, with a grinding gap being formed between the grinding rollers for comminution of the material. From the DE 39 30 773 A1 A roller mill with a fixed and a loosely mounted grinding roller is known, with the loosely mounted roller being connected to hydraulic actuators.

Im Betrieb der Walzenmühle kommt es häufig zu einer ungleichmäßigen Belastung der Mahlwalzen, was beispielsweise auf einen ungleichmäßigen Verschleiß der Oberfläche der Mahlwalzen oder Materialien unterschiedlicher Eigenschaften und Korngrößen zurückzuführen ist. Eine solche ungleichmäßige Belastung führt zu einem Schieflauf der Mahlwalzen, wobei die Mahlwalzen nicht parallel zueinander angeordnet sind. Ein erhöhter Schieflauf resultiert in einer ungleichmäßigen Abnutzung oder einer Beschädigung der Mahlwalze, wobei insbesondere an den Walzenenden angebrachte Randelemente beschädigt oder zerstört werden. Aus der WO2019093954 ist beispielsweise eine Walzenmühle bekannt, die keine Relativbewegung der Mahlwalzen erlaubt. Eine vollständige Verhinderung des Schieflaufs der Mahlwalzen führt allerdings zu einer hohen Belastung der Lager der Mahlwalzen, sodass diese erheblich früher versagen.During operation of the roller mill, there is often uneven loading on the grinding rollers, which is due, for example, to uneven wear on the surface of the grinding rollers or materials with different properties and grain sizes. Such uneven loading leads to misalignment of the grinding rollers, with the grinding rollers not being arranged parallel to one another. Increased misalignment results in uneven wear or damage to the grinding roller, with edge elements attached to the roller ends in particular being damaged or destroyed. From the WO2019093954 For example, a roller mill is known that does not allow any relative movement of the grinding rollers. However, completely preventing misalignment of the grinding rollers leads to a high load on the bearings of the grinding rollers, so that they fail significantly earlier.

Davon ausgehend ist es Aufgabe der vorliegenden Erfindung, eine Walzenmühle bereitzustellen, die eine durch einen Schieflauf der Mahlwalzen bedingte Beschädigung der Walzenmühle, insbesondere der Mahlwalzen und der Lager, zuverlässig verhindert.Proceeding from this, it is the object of the present invention to provide a roller mill which reliably prevents damage to the roller mill, in particular the grinding rollers and the bearings, caused by misalignment of the grinding rollers.

Diese Aufgabe wird erfindungsgemäß durch eine Mahlwalze mit den Merkmalen des unabhängigen Vorrichtungsanspruchs 1 gelöst. Vorteilhafte Weiterbildungen ergeben sich aus den abhängigen Ansprüchen.This object is achieved according to the invention by a grinding roller with the features of independent device claim 1. Advantageous further training results from the dependent requirements.

Eine Walzenmühle zum Zerkleinern von Schüttgut umfasst nach einem ersten Aspekt eine erste Mahlwalze und eine zweite Mahlwalze, die gegenüberliegend angeordnet und gegenläufig antreibbar sind, wobei zwischen den Mahlwalzen ein Mahlspalt ausgebildet ist. Die Walzenmühle weist auch eine Loslagereinheit zur Aufnahme der ersten Mahlwalze und eine Festlagereinheit zur Aufnahme der zweiten Mahlwalze auf, wobei die Loslagereinheit zwei Lager aufweist, die jeweils ein Ende der ersten Mahlwalze aufnehmen. An der Loslagereinheit ist eine Mehrzahl von Hydraulikaktuatoren angebracht zum Beaufschlagen der Loslagereinheit mit einer Kraft, und wobei die Lager der Loslagereinheit miteinander über eine Gleichlaufeinrichtung verbunden sind. Die Gleichlaufeinrichtung weist ein Kopplungselement auf, das in einer Kopplungsposition eine Relativbewegung der Lager der Loslagereinheit verhindert und in einer Freiposition eine Relativbewegung der Lager der Loslagereinheit erlaubt.According to a first aspect, a roller mill for comminuting bulk material comprises a first grinding roller and a second grinding roller, which are arranged opposite one another and can be driven in opposite directions, with a grinding gap being formed between the grinding rollers. The roller mill also has a floating bearing unit for receiving the first grinding roller and a fixed bearing unit for receiving the second grinding roller, the floating bearing unit having two bearings, each of which receives one end of the first grinding roller. A plurality of hydraulic actuators are attached to the floating bearing unit for applying a force to the floating bearing unit, and the bearings of the floating bearing unit are connected to one another via a synchronization device. The synchronization device has a coupling element which prevents a relative movement of the bearings of the floating bearing unit in a coupling position and allows a relative movement of the bearings of the floating bearing unit in a free position.

Die Loslagereinheit weist insbesondere zwei Lager auf, die jeweils ein Ende der ersten Mahlwalze aufnehmen. Vorzugsweise weist jede Mahlwalze einen Walzengrundkörper und eine dazu koaxiale Walzenwelle auf, die insbesondere an den Stirnseiten des Walzengrundkörpers aus diesem hervorsteht. Insbesondere ist die Walzenwelle an ihren gegenüberliegenden Enden jeweils in einem Lager der Loslagereinheit aufgenommen. Die Lager der Loslagereinheit sind vorzugsweise beweglich, insbesondere in radialer Richtung, an einem Maschinenrahmen der Walzenmühle aufgenommen, wobei die Lager der Festlagereinheit fest an dem Maschinenrahmen angebracht sind. Vorzugsweise weist jedes Lager einen Lagerstein und eine daran angebrachte Wälzlagereinheit mit einem äußeren und einem inneren Lagerring und dazwischen angeordneten Wälzkörpern auf. Auf. Der äußere Lagerring ist vorzugsweise fest an dem Lagerstein angebracht. Die Loslagereinheit und die Festlagereinheit weisen jeweils zwei Lagersteine auf, wobei die Lagersteine der Loslagereinheit an dem Maschinenrahmen bewegbar aufgenommen und die Lagersteine der Festlagereinheit an dem Maschinenrahmen befestigt sind, sodass der Lagerstein nicht relativ zu dem Maschinenrahmen bewegbar ist.The floating bearing unit has in particular two bearings, each of which accommodates one end of the first grinding roller. Each grinding roller preferably has a roller base body and a roller shaft coaxial therewith, which protrudes from the roller base body in particular on the end faces thereof. In particular, the roller shaft is accommodated at its opposite ends in a bearing of the floating bearing unit. The bearings of the floating bearing unit are preferably movable, in particular in the radial direction, accommodated on a machine frame of the roller mill, with the bearings of the fixed bearing unit being firmly attached to the machine frame. Each bearing preferably has a bearing block and a rolling bearing unit attached thereto with an outer and an inner bearing ring and rolling elements arranged between them. On. The outer bearing ring is preferably firmly attached to the bearing stone. The floating bearing unit and the fixed bearing unit each have two bearing stones, the bearing stones of the floating bearing unit being movably received on the machine frame and the bearing stones of the fixed bearing unit being fastened to the machine frame, so that the bearing stone is not movable relative to the machine frame.

Bei dem Hydraulikaktuator handelt es sich um ein Stellglied, das die Loslagereinheit mit einer Kraft beaufschlagt und diese beispielsweise bewegt. Vorzugsweise ist an jedem Lagerstein der Loslagereinheit ein Hydraulikaktuator angebracht. Der Hydraulikaktuator weist beispielsweise einen Zylinder mit einem darin bewegbar angebrachten Kolben auf, wobei eine Bewegung des Kolbens in einer Bewegung des Lagersteins oder einer Änderung der auf den Lagerstein wirkenden Kraft resultiert.The hydraulic actuator is an actuator that applies a force to the floating bearing unit and, for example, moves it. A hydraulic actuator is preferably attached to each bearing block of the floating bearing unit. The hydraulic actuator has, for example, a cylinder with a piston movably mounted therein, a movement of the piston resulting in a movement of the bearing stone or a change in the force acting on the bearing stone.

Die Gleichlaufeinrichtung weist vorzugsweise eine rotierbare Welle auf, die an dem Maschinenrahmen befestigt ist. Die Welle ist insbesondere um ihre Längsachse rotierbar angebracht. An den Enden der Welle ist jeweils eine Schubstange beispielsweise über einen Hebel angebracht, wobei sich der Hebel in einem Winkel von etwa 60 - 120°, vorzugsweise 90° zu der jeweiligen Schubstange erstreckt. Die Schubstange ist jeweils mit einem Lager, insbesondere dem Lagerstein, der Loslagereinheit verbunden. Vorzugsweise ist die Schubstange über das Kopplungselement an dem jeweiligen Lager derart angebracht, dass die Schubstange und das Lager relativ zueinander begrenzt bewegbar sind. Insbesondere ist das Lager in horizontaler Richtung, vorzugsweise in Erstreckungsrichtung der Schubstange, in dem Maschinenrahmen um einen bestimmten Betrag, insbesondere Wegdifferenz, bewegbar. Die Verbindung der Schubstange mit dem jeweiligen Lager weist vorzugsweise ein Spiel auf, sodass die Schubstange und das Lager um einen bestimmten Betrag, insbesondere Weg, relativ zueinander bewegbar sind. Vorzugsweise sind die Schubstange und das Lager ausschließlich linear in Erstreckungsrichtung der Schubstange relativ zueinander bewegbar. Die Bewegung der Schubstange und des Lagers sind vorzugsweise gekoppelt, sodass such das Kopplungselement in der Kopplungsposition befindet, wenn eine bestimmte Wegdifferenz zwischen dem Lager und der Schubstange überschritten ist.The synchronization device preferably has a rotatable shaft which is attached to the machine frame. The shaft is mounted in particular so that it can rotate about its longitudinal axis. A push rod is attached to each end of the shaft, for example via a lever, the lever extending at an angle of approximately 60 - 120°, preferably 90°, to the respective push rod. The push rod is each connected to a bearing, in particular the bearing block, of the floating bearing unit. Preferably, the push rod is attached to the respective bearing via the coupling element in such a way that the push rod and the bearing can be moved to a limited extent relative to one another. In particular, the bearing can be moved in the horizontal direction, preferably in the extension direction of the push rod, in the machine frame by a certain amount, in particular a path difference. The connection of the push rod with the respective bearing preferably has play, so that the push rod and the bearing can be moved relative to one another by a certain amount, in particular a distance. Preferably, the push rod and the bearing can only be moved linearly relative to one another in the direction of extension of the push rod. The movement of the push rod and the bearing are preferably coupled, so that the coupling element is in the coupling position when a certain path difference between the bearing and the push rod is exceeded.

In der Kopplungsposition des Kopplungselements ist eine Relativbewegung der Lager in zumindest einer Richtung, vorzugsweise in radialer Richtung der Mahlwalze, insbesondere in Richtung der Vergrößerung des Schieflaufs, verhindert. Vorzugsweise weist das Kopplungselement zwei Kopplungspositionen auf, wobei das Kopplungselement von der ersten Kopplungsposition über die Freiposition in die zweite Kopplungsposition bewegbar ist. Das Kopplungselement ist vorzugsweise derart ausgebildet, dass es das Lager mit der jeweiligen Schubstange koppelt, wenn die Relativbewegung der Lager der Loslagereinheit, vorzugsweise eines Lagers und der Schubstange einen vorabbestimmten Weg-Grenzwert überschreitet. Bei dem Weg-Grenzwert handelt es sich vorzugsweise um ein Spiel von etwa ±1mm bis ±20mm, vorzugsweise ±5mm, wobei der Weg-Grenzwert insbesondere eine Abweichung der Stellung des Lagers relativ zu einer Nullstellung ist, die der gewünschten Größe des Mahlspalts entspricht. Überschreitet die Relativbewegung den Weg-Grenzwert, befindet sich das Kopplungselement in der Kopplungsposition und koppelt die Bewegung der Lager der Loslagereinheit, vorzugsweise die Schubstange mit dem jeweiligen Lager, sodass diese fest miteinander verbunden sind und keine Relativbewegung in der jeweiligen Bewegungsrichtung möglich ist. Unter der Kopplung ist beispielsweise der Gleichlauf der Lager zu verstehen. In der Freiposition ist eine dem Weg-Grenzwert entsprechende maximale Relativbewegung der Lager möglich.In the coupling position of the coupling element, a relative movement of the bearings in at least one direction, preferably in the radial direction of the grinding roller, in particular in the direction of increasing the misalignment, is prevented. Preferably, the coupling element has two coupling positions, with the coupling element moving from the first coupling position via the free position to the second Coupling position is movable. The coupling element is preferably designed such that it couples the bearing with the respective push rod when the relative movement of the bearings of the floating bearing unit, preferably a bearing and the push rod, exceeds a predetermined travel limit. The travel limit value is preferably a clearance of approximately ±1mm to ±20mm, preferably ±5mm, whereby the travel limit value is in particular a deviation of the position of the bearing relative to a zero position which corresponds to the desired size of the grinding gap. If the relative movement exceeds the travel limit value, the coupling element is in the coupling position and couples the movement of the bearings of the floating bearing unit, preferably the push rod with the respective bearing, so that they are firmly connected to one another and no relative movement in the respective direction of movement is possible. Coupling means, for example, the synchronization of the bearings. In the free position, a maximum relative movement of the bearings corresponding to the travel limit is possible.

Im Betrieb der Walzenmühle stellt sich bei einer ungleichmäßigen Belastung der Mahlwalze ein Schieflauf der Mahlwalzen ein, wobei zumindest ein Lager der Loslagereinheit in radialer Richtung bewegt wird. Übersteigt diese radiale Bewegung den Betrag des Spiels zwischen den Kopplungspositionen des Kopplungselements dem jeweiligen Lager und der mit diesem verbundenen Schubstange, wird die Schubstange in radialer Richtung bewegt und rotiert über den Hebel die Welle der Gleichlaufeinrichtung. Eine Rotation der Welle resultiert in einer Bewegung der zweiten Schubstange und einer entsprechenden Bewegung des mit dieser verbundenen Lagers der Loslagereinheit. Ein Spiel zwischen den Schubstangen und der Loslagereinheit ermöglicht einen vorab festgelegten Betrag einer Relativbewegung der Schubstange und dem Lager, sodass ein bestimmter Schieflauf der Mahlwalzen ermöglicht aber begrenzt wird, sodass eine Beschädigung der Mahlwalzen begingt durch einen zu großen Schieflauf verhindert wird. Vorzugsweise ist das Spiel in horizontaler Richtung, insbesondere in Richtung der Mahlkraft oder der Erstreckungsrichtung der Schubstange, ausgebildet. Das Spiel beträgt beispielsweise ±1mm bis ±20mm, vorzugsweise ±5mm.When the roller mill is in operation, if the grinding roller is unevenly loaded, the grinding rollers become misaligned, with at least one bearing of the floating bearing unit being moved in the radial direction. If this radial movement exceeds the amount of play between the coupling positions of the coupling element, the respective bearing and the push rod connected to it, the push rod is moved in the radial direction and rotates the shaft of the synchronization device via the lever. A rotation of the shaft results in a movement of the second push rod and a corresponding movement of the bearing of the floating bearing unit connected to it. A play between the push rods and the floating bearing unit enables a predetermined amount of relative movement of the push rod and the bearing, so that a certain misalignment of the grinding rollers is enabled but limited, so that damage to the grinding rollers caused by excessive misalignment is prevented. The play is preferably formed in the horizontal direction, in particular in the direction of the grinding force or the direction of extension of the push rod. The play is, for example, ±1mm to ±20mm, preferably ±5mm.

Gemäß einer ersten Ausführungsform weist die Gleichlaufeinrichtung eine rotierbare Welle und zumindest zwei Schubstangen auf, wobei die Schubstangen mit jeweils einem Ende mit der Welle und mit dem jeweils anderen Ende mit der Loslagereinheit verbunden sind, wobei die Schubstangen und/ oder die Welle das Kopplungselement aufweist. Der Hydraulikaktuator ist vorzugsweise direkt an dem jeweiligen Lager angebracht.According to a first embodiment, the synchronization device has a rotatable shaft and at least two push rods, the push rods each having one end connected to the shaft and the other end being connected to the floating bearing unit, the push rods and/or the shaft having the coupling element. The hydraulic actuator is preferably attached directly to the respective bearing.

Die Gleichlaufeinrichtung umfasst gemäß einer weiteren Ausführungsform eine rotierbare Welle und zumindest zwei Schubstangen, wobei die Schubstangen mit jeweils einem Ende mit der Welle und mit dem jeweils anderen Ende mit jeweils einem Lager der Loslagereinheit verbunden sind, wobei die Schubstangen jeweils über ein Kopplungselement mit dem jeweiligen Lager der Loslagereinheit und/ oder der Welle verbunden sind. Insbesondere ist jedes Lager der Loslagereinheit mit zumindest einem Hydraulikaktuator und einer Schubstange verbunden, wobei die Verbindung des Lagers mit der jeweiligen Schubstange eine Kopplungseinheit aufweist.According to a further embodiment, the synchronization device comprises a rotatable shaft and at least two push rods, the push rods each having one end connected to the shaft and the other end each being connected to a bearing of the floating bearing unit, the push rods each being connected to the respective one via a coupling element Bearings of the floating bearing unit and / or the shaft are connected. In particular, each bearing of the floating bearing unit is connected to at least one hydraulic actuator and a push rod, with the connection of the bearing to the respective push rod having a coupling unit.

Gemäß einer weiteren Ausführungsform umfasst das Kopplungselement eine Linearführung. Die Linearführung ist vorzugsweise derart ausgebildet, dass sie eine Relativbewegung der Schubstange und des Lagers in Richtung der Mahlkraft oder der Erstreckung der Schubstange erlaubt und in davon abweichenden Richtungen verhindert. Die Linearführung weist gemäß einer weiteren Ausführungsform zumindest einen Anschlag zu Begrenzung der Relativbewegung des Lagers zu der Schubstange auf.According to a further embodiment, the coupling element comprises a linear guide. The linear guide is preferably designed in such a way that it allows a relative movement of the push rod and the bearing in the direction of the grinding force or the extension of the push rod and prevents it in directions deviating therefrom. According to a further embodiment, the linear guide has at least one stop to limit the relative movement of the bearing to the push rod.

Gemäß einer weiteren Ausführungsform ist das Kopplungselement zumindest teilweise in der Schubstange ausgebildet, wobei jede Schubstange zumindest ein Kopplungselement aufweist. Beispielsweise ist das Kopplungselement in einem Endbereich der Schubstange ausgebildet, vorzugsweise in dem Endbereich, der dem Lager zugewandt ist. Das Kopplungselement umfasst gemäß einem weiteren Ausführungsbeispiel einen Hydraulikaktuator vorzugsweise mit einem Hydraulikzylinder, in dem ein Kolben angeordnet ist, der zwei Hydraulikkammern voneinander trennt. Beispielsweise ist ein Endbereich der Schubstange als Hydraulikzylinder ausgebildet.According to a further embodiment, the coupling element is at least partially formed in the push rod, each push rod having at least one coupling element. For example, the coupling element is formed in an end region of the push rod, preferably in the end region that faces the bearing. According to a further exemplary embodiment, the coupling element comprises a hydraulic actuator, preferably with a hydraulic cylinder in which a piston is arranged which separates two hydraulic chambers from one another. For example, an end region of the push rod is designed as a hydraulic cylinder.

Gemäß einer weiteren Ausführungsform weist die Walzenmühle zwei Kopplungselemente auf, die hydraulisch miteinander verbunden sind. Vorzugsweise ist jede Kopplungseinheit an einer Schubstange angebracht. Insbesondere sind die Hydraulikkammern der jeweiligen Kopplungselemente miteinander verbunden. Eine hydraulische Verbindung der Kopplungselemente sorgt für eine gleichmäßige Bewegung der beiden Kopplungselemente. Die hydraulische Verbindung der Kopplungselemente umfasst optional ein Drosselungselement, wie beispielsweise eine Drosselklappe, zur Drosselung, vorzugsweise Begrenzung, der Relativgeschwindigkeiten der Schubstangen, insbesondere der Mahlwalzen.According to a further embodiment, the roller mill has two coupling elements that are hydraulically connected to one another. Preferably, each coupling unit is attached to a push rod. In particular, the hydraulic chambers of the respective coupling elements are connected to one another. A hydraulic connection of the coupling elements ensures uniform movement of the two coupling elements. The hydraulic connection of the coupling elements optionally includes a throttling element, such as a throttle valve, for throttling, preferably limiting, the relative speeds of the push rods, in particular the grinding rollers.

Das Kopplungselement umfasst gemäß einer weiteren Ausführungsform einen Hohlzylinder, der in einem Endbereich der Schubstange ausgebildet ist. Die Schubstangen sind insbesondere jeweils mittels eines Befestigungselements an dem jeweiligen Lager der Loslagereinheit angebracht, wobei das Befestigungselement an der Loslagereinheit befestigt und mit der jeweiligen Schubstange relativ zueinander bewegbar verbunden ist. Das Befestigungselement umfasst beispielsweise einen Kolben, der innerhalb des in der Schubstange ausgebildeten Hohlzylinders gleitbar angeordnet ist. Der Hohlzylinder bildet vorzugsweise einen Anschlag zur Begrenzung der Relativbewegung des Lagers zu der Schubstange aus. Das Spiel wird insbesondere durch den Kolbenhub, vorzugsweise die Länge des Hohlzylinders bestimmt.According to a further embodiment, the coupling element comprises a hollow cylinder which is formed in an end region of the push rod. In particular, the push rods are each attached to the respective bearing of the floating bearing unit by means of a fastening element, the fastening element being fastened to the floating bearing unit and being connected to the respective push rod so as to be movable relative to one another. The fastening element comprises, for example, a piston which is slidably arranged within the hollow cylinder formed in the push rod. The hollow cylinder preferably forms a stop for limiting the relative movement of the bearing to the push rod. The play is determined in particular by the piston stroke, preferably the length of the hollow cylinder.

Gemäß einer weiteren Ausführungsform weist die Welle einen ersten Wellenabschnitt und einen zweiten Wellenabschnitt auf, die miteinander über das Kopplungselement verbunden sind. Das Kopplungselement ist gemäß einer weiteren Ausführungsform als Klauenkupplung ausgebildet. Ein als Klauenkupplung ausgebildetes Kopplungselement umfasst vorzugsweise eine Kopplungswelle und eine um diese und konzentrisch zu dieser angeordnete Hohlwelle, wobei die Kopplungswelle mit einem Wellenabschnitt und die Hohlwelle mit dem anderen Wellenabschnitt fest verbunden ist. Die Hohlwelle und die Kopplungswelle weisen vorzugsweise Verbindungselemente auf, die in einer Kopplungsposition zusammenwirken, sodass eine Relativbewegung der Kopplungswelle und der Hohlwelle verhindert und in einer Freiposition eine Relativbewegung Kopplungswelle und der Hohlwelle erlauben. Die Verbindungselemente umfassen beispielsweise auf der Kopplungswelle umfangsmäßig angeordnete Vorsprünge, die mit in der Hohlwelle am inneren Umfang angeordneten Aussparungen zusammenwirken. Die Aussparungen sind vorzugsweise größer als die Vorsprünge, sodass eine bestimmte relative Umdrehung der Kopplungswelle und der Hohlwelle möglich ist.According to a further embodiment, the shaft has a first shaft section and a second shaft section, which are connected to one another via the coupling element. According to a further embodiment, the coupling element is designed as a claw clutch. A coupling element designed as a claw coupling preferably comprises a coupling shaft and a hollow shaft arranged around it and concentrically thereto, the coupling shaft being firmly connected to one shaft section and the hollow shaft to the other shaft section. The hollow shaft and the coupling shaft preferably have connecting elements which cooperate in a coupling position, so that a relative movement of the coupling shaft and the hollow shaft is prevented and in a free position allow a relative movement of the coupling shaft and the hollow shaft. The connecting elements include, for example, projections arranged circumferentially on the coupling shaft, which are arranged in the hollow shaft on the inner circumference Recesses work together. The recesses are preferably larger than the projections, so that a certain relative rotation of the coupling shaft and the hollow shaft is possible.

Es ist ebenfalls denkbar, dass die an den Lagern befestigten Hydraulikaktuatoren mit jeweils einer Dämpfereinheit verbunden. Die Dämpfereinheiten sind jeweils über eine Hydraulikleitung mit den Hydraulikaktuatoren verbunden. Jede Dämpfereinheit ist insbesondere als einfach wirkender Hydraulikzylinder ausgebildet und weist jeweils einen Zylinder mit einem Kolben auf, der eine Gaskammer von einer Hydraulikkammer trennt und innerhalb des Zylinders bewegbar ist. Die Gaskammer ist vorzugsweise mit einem komprimierbaren Gas, wie beispielsweise Stickstoff gefüllt, wobei die Hydraulikkammer mit einem nicht komprimierbaren Hydrauliköl gefüllt ist und mit der jeweiligen Hydraulikleitung verbunden ist, sodass Hydrauliköl von der jeweiligen Hydraulikleitung in die Hydraulikkammer strömbar ist. Die Dämpfereinheit dient als Dämpfer der Hydraulikaktuatoren und erzeugt vorzugsweise die Kraft.It is also conceivable that the hydraulic actuators attached to the bearings are each connected to a damper unit. The damper units are each connected to the hydraulic actuators via a hydraulic line. Each damper unit is designed in particular as a single-acting hydraulic cylinder and each has a cylinder with a piston that separates a gas chamber from a hydraulic chamber and is movable within the cylinder. The gas chamber is preferably filled with a compressible gas, such as nitrogen, wherein the hydraulic chamber is filled with a non-compressible hydraulic oil and is connected to the respective hydraulic line, so that hydraulic oil can flow from the respective hydraulic line into the hydraulic chamber. The damper unit serves as a damper for the hydraulic actuators and preferably generates the force.

Beschreibung der ZeichnungenDescription of the drawings

Die Erfindung ist nachfolgend anhand mehrerer Ausführungsbeispiele mit Bezug auf die beiliegenden Figuren näher erläutert.

  • Fig. 1 zeigt eine schematische Darstellung einer Walzenmühle mit einer Gleichlaufeinrichtung in einer Längsschnittansicht gemäß einem Ausführungsbeispiel.
  • Fig. 2 zeigt eine schematische Darstellung einer Walzenmühle mit einer Gleichlaufeinrichtung in einer Schnittansicht gemäß einem weiteren Ausführungsbeispiel.
  • Fig. 3 zeigt eine schematische Darstellung einer Walzenmühle mit einer Gleichlaufeinrichtung in einer Schnittansicht gemäß einem weiteren Ausführungsbeispiel.
The invention is explained in more detail below using several exemplary embodiments with reference to the accompanying figures.
  • Fig. 1 shows a schematic representation of a roller mill with a synchronization device in a longitudinal section view according to an exemplary embodiment.
  • Fig. 2 shows a schematic representation of a roller mill with a synchronization device in a sectional view according to a further exemplary embodiment.
  • Fig. 3 shows a schematic representation of a roller mill with a synchronization device in a sectional view according to a further exemplary embodiment.

Fig. 1 zeigt eine Walzenmühle 10 mit einer ersten Mahlwalze 12 und einer zweiten Mahlwalze 14, wobei die Mahlwalzen 12, 14 gegenüberliegend angeordnet und gegenläufig rotierbar sind. Zwischen den Mahlwalze 12, 14 ist ein Mahlspalt 16 ausgebildet. Die Mahlwalzen 12, 14 weisen jeweils einen im Wesentlichen zylinderförmigen Walzengrundkörper 18, 20 und eine koaxial zu diesem angeordnete Antriebswelle 22, 24 deren Enden sich in axialer Richtung vorzugsweise über den jeweiligen Walzengrundkörper 18, 20 hinaus erstrecken. Jede der Mahlwalzen 12, 14 ist ein in einer Lagereinheit aufgenommen, wobei sich die Lagereinheiten beispielsweise an einem in Fig. 1 nicht vollständig dargestellten Maschinenrahmen 29 abstützen. Die erste Mahlwalze 12 ist in einer Loslagereinheit 26 aufgenommen, wobei die zweite Mahlwalze 14 in einer Festlagereinheit 28 aufgenommen ist. Die Festlagereinheit 28 umfasst zwei Lager 30, 32, die jeweils an gegenüberliegenden Walzenenden angeordnet sind und die Antriebswelle 24 aufnehmen. Die Lager 30, 32 sind fest an dem Maschinenrahmen 29 angebracht, sodass diese insbesondere in axialer und radialer Richtung der Mahlwalze 14 Kräfte aufnehmen und nicht bewegbar sind. Die Loslagereinheit 26 umfasst zwei Lager 34, 36, die jeweils ein Ende der Antriebswelle 22 der ersten Mahlwalze 12 aufnehmen. Die Lager 34, 36 der Loslagereinheit 26 sind derart an dem Maschinenrahmen 29 aufgenommen, dass sie linear, insbesondere horizontal, vorzugweise gleitend bewegbar sind. In axialer Richtung der ersten Mahlwalze 12 sind auch die Lager 34, 36 vorzugsweise fest angebracht. Die Lager 34, 36 der Loslagereinheit 26 sind jeweils in radialer Richtung der Mahlwalzen 12, 14 bewegbar angebracht und jeweils mit einem, vorzugsweise jeweils mit zwei, Hydraulikaktuatoren 38, 40 verbunden. Die Hydraulikaktuatoren 38, 40 dienen jeweils dazu, die erste Mahlwalze 12, die in der Loslagereinheit 26 gelagert ist, mit einer Mahlkraft in Richtung der zweiten Mahlwalze 14 zu beaufschlagen. Die Mahlkraft ist vorzugsweise in einer Richtung orthogonal zur Aufgabe des Materials in den Mahlspalt 16 ausgerichtet, insbesondere verläuft die Mahlkraft in horizontaler Richtung. Die Loslagereinheit 26 ist insbesondere in Richtung der mittels der Hydraulikaktuatoren 38, 40 aufgebrachten Mahlkraft bewegbar. Fig. 1 shows a roller mill 10 with a first grinding roller 12 and a second grinding roller 14, the grinding rollers 12, 14 being arranged opposite one another and being rotatable in opposite directions. A grinding gap 16 is formed between the grinding rollers 12, 14. The grinding rollers 12, 14 each have a substantially cylindrical roller base body 18, 20 and a drive shaft 22, 24 arranged coaxially thereto, the ends of which preferably extend in the axial direction beyond the respective roller base body 18, 20. Each of the grinding rollers 12, 14 is accommodated in a storage unit, the storage units being located, for example, on an in Fig. 1 support the machine frame 29, which is not completely shown. The first grinding roller 12 is accommodated in a floating bearing unit 26, with the second grinding roller 14 being accommodated in a fixed bearing unit 28. The fixed bearing unit 28 comprises two bearings 30, 32, which are each arranged at opposite roller ends and accommodate the drive shaft 24. The bearings 30, 32 are firmly attached to the machine frame 29, so that they absorb forces, particularly in the axial and radial directions of the grinding roller 14, and are not movable. The floating bearing unit 26 includes two bearings 34, 36, each of which accommodates one end of the drive shaft 22 of the first grinding roller 12. The bearings 34, 36 of the floating bearing unit 26 are accommodated on the machine frame 29 in such a way that they can be moved linearly, in particular horizontally, preferably in a sliding manner. The bearings 34, 36 are preferably firmly attached in the axial direction of the first grinding roller 12. The bearings 34, 36 of the floating bearing unit 26 are each mounted movably in the radial direction of the grinding rollers 12, 14 and are each connected to one, preferably two, hydraulic actuators 38, 40. The hydraulic actuators 38, 40 each serve to apply a grinding force in the direction of the second grinding roller 14 to the first grinding roller 12, which is mounted in the floating bearing unit 26. The grinding force is preferably aligned in a direction orthogonal to the feeding of the material into the grinding gap 16, in particular the grinding force runs in a horizontal direction. The floating bearing unit 26 can be moved in particular in the direction of the grinding force applied by the hydraulic actuators 38, 40.

Die Hydraulikaktuatoren 38, 40 stützen sich jeweils mit ihrem einen Ende an einem Lager 34, 36 und mit ihrem gegenüberliegenden anderen Ende an dem Maschinenrahmen 29 ab. Eine Bewegung des jeweiligen Lagers 34, 36 der Loslagereinheit 26 resultiert in einer entsprechenden Bewegung des jeweils daran angebrachten Hydraulikaktuators 38, 40. Jeder Hydraulikaktuator 38, 40 weist vorzugsweise einen Zylinder und einen darin bewegbar angebrachten Kolben auf, wobei unter der Bewegung des Hydraulikaktuators beispielsweise eine Bewegung des Kolbens innerhalb des Zylinders zu verstehen ist.The hydraulic actuators 38, 40 are each supported with one end on a bearing 34, 36 and with their opposite other end on the machine frame 29. A movement of the respective bearing 34, 36 of Floating bearing unit 26 results in a corresponding movement of the hydraulic actuator 38, 40 attached to it. Each hydraulic actuator 38, 40 preferably has a cylinder and a piston movably mounted therein, the movement of the hydraulic actuator being understood to mean, for example, a movement of the piston within the cylinder .

Die Walzenmühle 10 weist des Weiteren eine Gleichlaufeinrichtung 42 auf. Die Gleichlaufeinrichtung 42 dient dazu, die Bewegung der Lager 34, 36 der Loslagereinheit 26 zu koppeln, insbesondere zu synchronisieren, sodass sich die Lager 34, 36 synchron bewegen und insbesondere ein Schieflauf der Mahlwalze 12, 14, bei welchem diese nicht parallel zueinander ausgerichtet sind, vermieden oder vorzugsweise begrenzt wird. Die Gleichlaufeinrichtung 42 weist eine Welle 44 auf, an deren Enden jeweils ein Hebel 46, 48 angebracht ist, der sich jeweils in radialer Richtung der Welle 44 erstreckt. Die Welle 44 ist beispielhaft über zwei Befestigungsmittel 50, 52 an dem Maschinenrahmen 29 befestigt, wobei die Welle 44 drehbar, beispielsweise mittels jeweiliger Lager mit den Befestigungsmitteln 50, 52 verbunden ist, sodass die Welle 44 um ihre Mittellängsachse relativ zu den Befestigungsmitteln 50, 52 drehbar ist. An den Hebeln 46, 48 ist jeweils eine Schubstange 54, 56 angebracht, die jeweils mit einem Lager 34, 36 der Loslagereinheit 26 verbunden sind. Vorzugsweise sind die Schubstangen 54, 56 jeweils an dem Gehäuse des jeweiligen Lagers 34, 36 angebracht. Die Schubstangen 54, 56 der Gleichlaufeinrichtung 44 sind insbesondere derart an den Lagern 34, 36 der Loslagereinheit 26 angebracht, dass die Lager 24, 36 und die jeweilige Schubstange 54, 56 relativ zueinander, vorzugsweise in Richtung der Mahlkraft oder in Erstreckungsrichtung der Schubstangen 54, 56, bewegbar sind. Vorzugsweise sind die Schubstangen 54, 56 jeweils über ein Befestigungselement 58, 60 mit dem jeweiligen Lager 34, 36 verbunden, wobei die Schubstange 54, 56 mit ihrem einen Ende an dem jeweiligen Hebel 46, 48 und mit dem anderen Ende an dem Befestigungselement 58, 60 befestigt ist. Die Befestigungselemente 58, 60 und die Schubstangen 54, 56 sind derart miteinander verbunden, dass sie relativ zueinander bewegbar sind. Beispielhaft ist ein Kopplungselement 62, 64 vorgesehen, das der Kopplung des Befestigungselements 58, 60 mit der Schubstange 54, 56 dient. Bei dem Kopplungselement 62, 64 handelt es sich beispielsweise um eine Linearführung, die lediglich eine lineare Bewegung, vorzugsweise in Richtung der Mahlkraft, in radialer Richtung der Mahlwalzen 12, 14 oder der Erstreckungsrichtung der Schubstange 54, 56, zulässt.The roller mill 10 also has a synchronization device 42. The synchronization device 42 serves to couple, in particular to synchronize, the movement of the bearings 34, 36 of the floating bearing unit 26, so that the bearings 34, 36 move synchronously and in particular to avoid misalignment of the grinding roller 12, 14, in which they are not aligned parallel to one another , avoided or preferably limited. The synchronization device 42 has a shaft 44, at the ends of which a lever 46, 48 is attached, which extends in the radial direction of the shaft 44. The shaft 44 is, for example, attached to the machine frame 29 via two fastening means 50, 52, the shaft 44 being rotatably connected to the fastening means 50, 52, for example by means of respective bearings, so that the shaft 44 rotates about its central longitudinal axis relative to the fastening means 50, 52 is rotatable. A push rod 54, 56 is attached to the levers 46, 48, each of which is connected to a bearing 34, 36 of the floating bearing unit 26. The push rods 54, 56 are preferably each attached to the housing of the respective bearing 34, 36. The push rods 54, 56 of the synchronization device 44 are in particular attached to the bearings 34, 36 of the floating bearing unit 26 in such a way that the bearings 24, 36 and the respective push rod 54, 56 are relative to one another, preferably in the direction of the grinding force or in the direction of extension of the push rods 54. 56, are movable. Preferably, the push rods 54, 56 are each connected to the respective bearing 34, 36 via a fastening element 58, 60, the push rod 54, 56 having one end on the respective lever 46, 48 and the other end on the fastening element 58. 60 is attached. The fastening elements 58, 60 and the push rods 54, 56 are connected to one another in such a way that they are movable relative to one another. By way of example, a coupling element 62, 64 is provided, which serves to couple the fastening element 58, 60 to the push rod 54, 56. The coupling element 62, 64 is, for example, a linear guide that only has a linear movement, preferably in the direction of the grinding force, in a radial direction Direction of the grinding rollers 12, 14 or the direction of extension of the push rod 54, 56 allows.

In dem Ausführungsbeispiel der Fig. 1 umfasst das Kopplungselement 62, 64 beispielhaft einen Hohlzylinder, der in einem Endbereich der Schubstange 54, 56 ausgebildet ist. Innerhalb des Hohlzylinders ist ein Kolben angeordnet, der einen Endbereich des Befestigungselements 60 ausbildet. Der Kolben ist innerhalb des Hohlzylinders gleitbar angeordnet. Der Hohlzylinder und der Kolben sind derart ausgebildet, dass der Kolbenhub etwa 1mm bis 20mm, vorzugsweise 10mm beträgt. Das in Fig. 1 dargestellte Kopplungselement 62, 64 ist in einer Kopplungsposition, in der die Relativbewegung der Schubstangen 54, 56, insbesondere der Mahlwalzen 12, 14 in zumindest einer Richtung, nämlich in Richtung der Vergrößerung des Schieflaufs, verhindert wird.In the exemplary embodiment Fig. 1 For example, the coupling element 62, 64 comprises a hollow cylinder which is formed in an end region of the push rod 54, 56. A piston is arranged within the hollow cylinder and forms an end region of the fastening element 60. The piston is slidably arranged within the hollow cylinder. The hollow cylinder and the piston are designed such that the piston stroke is approximately 1mm to 20mm, preferably 10mm. This in Fig. 1 The coupling element 62, 64 shown is in a coupling position in which the relative movement of the push rods 54, 56, in particular the grinding rollers 12, 14, is prevented in at least one direction, namely in the direction of increasing the misalignment.

Die an den Lagern 34, 36 befestigten Hydraulikaktuatoren 38, 40 sind optional mit jeweils einer Dämpfereinheit 66, 68 zum optionalen Erzeugen der Mahlkraft verbunden. Die Dämpfereinheiten 66, 68 sind jeweils über eine der Hydraulikleitungen mit den Hydraulikaktuatoren 38, 40 verbunden. Die Dämpfereinheiten 66, 68 sind vorzugweise im Wesentlichen identisch ausgebildet. Jede Dämpfereinheit 66, 68 ist insbesondere als einfach wirkender Hydraulikzylinder ausgebildet und weist jeweils einen Zylinder mit einem Kolben 74, 80 auf, der eine Gaskammer 70, 76 von einer Hydraulikkammer 72, 78 trennt und innerhalb des Zylinders bewegbar ist. Die Gaskammer 70, 76 ist vorzugsweise mit einem komprimierbaren Gas, wie beispielsweise Stickstoff gefüllt, wobei die Hydraulikkammer 72, 78 mit einem nicht komprimierbaren Hydrauliköl gefüllt ist und mit der jeweiligen Hydraulikleitung verbunden ist, sodass Hydrauliköl von der jeweiligen Hydraulikleitung in die Hydraulikkammer 72, 78 strömbar ist. Die Dämpfereinheit 66, 68 dient als Feder der Hydraulikaktuatoren 38, 40.The hydraulic actuators 38, 40 attached to the bearings 34, 36 are optionally each connected to a damper unit 66, 68 for optionally generating the grinding force. The damper units 66, 68 are each connected to the hydraulic actuators 38, 40 via one of the hydraulic lines. The damper units 66, 68 are preferably designed to be essentially identical. Each damper unit 66, 68 is designed in particular as a single-acting hydraulic cylinder and each has a cylinder with a piston 74, 80 which separates a gas chamber 70, 76 from a hydraulic chamber 72, 78 and is movable within the cylinder. The gas chamber 70, 76 is preferably filled with a compressible gas, such as nitrogen, wherein the hydraulic chamber 72, 78 is filled with a non-compressible hydraulic oil and is connected to the respective hydraulic line, so that hydraulic oil from the respective hydraulic line into the hydraulic chamber 72, 78 is flowable. The damper unit 66, 68 serves as a spring for the hydraulic actuators 38, 40.

Im Betrieb der Walzenmühle 10 werden die Hydraulikaktuatoren 38, 40 zunächst jeweils mit dem gleichen Hydraulikdruck beaufschlagt. Bei einem Schieflauf der Mahlwalzen 12, 14, der beispielsweise durch eine ungleichmäßige Beanspruchung der Mahlwalzen in dem Mahlprozess hervorgerufen werden kann, bewegt sich eines der Lager 34, 36 der Loslagereinheit von dem Mahlspalt 16 weg, sodass die mit dem jeweiligen Lager 34 oder 36 verbundenen Hydraulikzylinder 38 oder 40 mit dem Lager 34, 36 bewegt werden. Eine Bewegung zumindest eines der Lager 34, 36 resultiert in einer Bewegung des jeweils mit dem Lager 34, 36 verbundenen Befestigungselements 50, 52 relativ zu der jeweiligen Schubstange 54, 56. Überschreitet die Relativbewegung den Kolbenhub in dem jeweiligen Kopplungselement 62, 64, resultiert dies in einer Bewegung der jeweiligen Schubstange 54, 56. Jede Schubstange 54, 56 ist über einen radialen Heben 46, 48 mit der Welle 44 verbunden, sodass eine Bewegung einer Schubstange 54, 56 in einer Rotation der Welle 44 resultiert, wodurch die Bewegungen der Schubstangen 54, 56 gekoppelt sind. Dies führt dazu, dass ein Schieflauf der Mahlwalzen 12, 14 relativ zueinander ermöglicht und begrenzt.During operation of the roller mill 10, the hydraulic actuators 38, 40 are initially each subjected to the same hydraulic pressure. If the grinding rollers 12, 14 are misaligned, which can be caused, for example, by uneven loading of the grinding rollers in the grinding process, one of the bearings 34, 36 of the floating bearing unit moves away from the grinding gap 16, so that the bearing 34 with the respective bearing 34 or 36 connected hydraulic cylinders 38 or 40 can be moved with the bearing 34, 36. A movement of at least one of the bearings 34, 36 results in a movement of the fastening element 50, 52 connected to the bearing 34, 36 relative to the respective push rod 54, 56. If the relative movement exceeds the piston stroke in the respective coupling element 62, 64, this results in a movement of the respective push rod 54, 56. Each push rod 54, 56 is connected to the shaft 44 via a radial lift 46, 48, so that movement of a push rod 54, 56 results in a rotation of the shaft 44, thereby changing the movements of the push rods 54, 56 are coupled. This means that misalignment of the grinding rollers 12, 14 relative to one another is enabled and limited.

Ein solcher begrenzter Schieflauf verhindert eine Beschädigung der Mahlwalze, wobei insbesondere Beschädigungen an den Walzenenden angebrachte Randelemente verhindert wird. Sobald die ungleichmäßige Belastung, beispielsweise durch Schwankungen der Materialzusammensetzung, vorüber ist, wird der Hydraulikdruck durch die Dämpferreinheit 66, 68 und die Hydraulikaktuatoren 38, 40 automatisch wieder auf den Ausgangswert geregelt.Such a limited misalignment prevents damage to the grinding roller, in particular preventing damage to edge elements attached to the roller ends. As soon as the uneven load, for example due to fluctuations in the material composition, is over, the hydraulic pressure is automatically regulated back to the initial value by the damper unit 66, 68 and the hydraulic actuators 38, 40.

Fig. 2 zeigt ein weiteres Ausführungsbeispiel einer Walzenmühle 10 mit einer Gleichlaufeinrichtung 42, wobei gleiche Elemente mit gleichen Bezugszeichen versehen sind. Die Walzenmühle 10 der Fig. 2 weist im Unterschied zu der Walzenmühle des Ausführungsbeispiels der Fig. 1 ein alternatives Kopplungselement 62, 64 auf. Das Kopplungselement 62, 64 der Fig. 2 umfassen jeweils einen Hydraulikaktuator mit zwei Hydraulikkammern, die durch einen Kolben voneinander getrennt sind. Die Hydraulikkammern der Kopplungseinheit 62, 64 sind vorzugsweise mit einem inkompressiblen Hydrauliköl gefüllt. Der Kolben ist vorzugsweise an einem Ende des Befestigungselements 58, 60 ausgebildet. Die Walzenmühle 10 weist vorzugsweise zwei Kopplungselemente 62, 64 auf, die jeweils zur Kopplung einer der Schubstangen 54, 56 mit jeweils einer der Lager 34, 36 der Loslagereinheit 26 angeordnet ist. Die Kopplungselemente 62, 64 sind beispielhaft über Hydraulikleitungen miteinander verbunden, wobei jede Hydraulikkammer einer Kopplungseinheit 62, 64 mit der entsprechenden Hydraulikkammer des anderen Kopplungselements 62, 64 über eine Hydraulikleitung verbunden ist, sodass eine Bewegung einer der Kolben bei einer Schiefstellung der Mahlwalzen 12, 14 in der entgegengesetzten Bewegung des jeweils anderen Kolbens resultiert, wobei eine Schiefstellung der Mahlwalzen 12, 14 erlaubt und auf den Kolbenhub begrenzt wird. Fig. 2 shows a further exemplary embodiment of a roller mill 10 with a synchronization device 42, the same elements being provided with the same reference numerals. The roller mill 10 of Fig. 2 in contrast to the roller mill of the exemplary embodiment Fig. 1 an alternative coupling element 62, 64. The coupling element 62, 64 of Fig. 2 each include a hydraulic actuator with two hydraulic chambers that are separated from each other by a piston. The hydraulic chambers of the coupling unit 62, 64 are preferably filled with an incompressible hydraulic oil. The piston is preferably formed at one end of the fastening element 58, 60. The roller mill 10 preferably has two coupling elements 62, 64, each of which is arranged to couple one of the push rods 54, 56 to one of the bearings 34, 36 of the floating bearing unit 26. The coupling elements 62, 64 are, for example, connected to one another via hydraulic lines, with each hydraulic chamber of a coupling unit 62, 64 being connected to the corresponding hydraulic chamber of the other coupling element 62, 64 via a hydraulic line, so that a movement of one of the pistons at one Misalignment of the grinding rollers 12, 14 results in the opposite movement of the other piston, with a misalignment of the grinding rollers 12, 14 being permitted and limited to the piston stroke.

Es ist ebenfalls denkbar, dass die als Hydraulikaktuatoren ausgebildete Kopplungselemente 62, 64 nicht miteinander über eine Hydraulikleitung, sondern jeweils mit einem zusätzlichen nicht dargestellten Vorspannelement, wie beispielsweise einem Hydraulikzylinder verbunden sind. Das Vorspannelement beaufschlagt den jeweiligen Hydraulikzylinder mit einer Vorspannkraft.It is also conceivable that the coupling elements 62, 64 designed as hydraulic actuators are not connected to one another via a hydraulic line, but rather to an additional biasing element (not shown), such as a hydraulic cylinder. The preload element applies a preload force to the respective hydraulic cylinder.

Fig. 3 zeigt ein weiteres Ausführungsbeispiel einer Walzenmühle 10 mit einer Gleichlaufeinrichtung 42, wobei gleiche Elemente mit gleichen Bezugszeichen versehen sind. Die Walzenmühle 10 der Fig. 3 weist im Unterschied zu der Walzenmühle des Ausführungsbeispiels der Fig. 2 ein alternatives Kopplungselement 82 auf, das in der Welle 44 angeordnet ist. Die Welle 44 weist beispielhaft zwei Wellenabschnitte auf, die über das Kopplungselement 82 miteinander verbunden sind. Das Kopplungselement 82 ist insbesondere als Klauenkupplung ausgebildet, die eine innere Kopplungswelle 84 und eine konzentrisch zu dieser angeordnete äußere Hohlwelle 86 aufweist. Die Kopplungswelle 84 weist auf ihrem äußeren Umfang beispielhaft Vorsprünge auf, die mit Ausnehmungen in dem inneren Umfang der Hohlwelle 86 zusammenwirken. Die Ausnehmungen sind größer als die Vorsprünge, sodass zwischen diesen ein Spiel ausgebildet ist und eine Rotation relativ zueinander um einen bestimmten Winkel ermöglicht wird. Beispielsweise ist die innere Kopplungswelle 84 mit einem Abschnitt der Welle 44 und die äußere Hohlwelle 86 mit dem jeweils anderen Abschnitt der Welle 44 verbunden, sodass eine bestimmte relative Rotation der Wellenabschnitte erlaubt ist, um einen bestimmten Schieflauf der Mahlwalzen 12, 14 zu erlauben. Fig. 3 shows a further exemplary embodiment of a roller mill 10 with a synchronization device 42, the same elements being provided with the same reference numerals. The roller mill 10 of Fig. 3 in contrast to the roller mill of the exemplary embodiment Fig. 2 an alternative coupling element 82 which is arranged in the shaft 44. The shaft 44 has, for example, two shaft sections that are connected to one another via the coupling element 82. The coupling element 82 is designed in particular as a claw coupling, which has an inner coupling shaft 84 and an outer hollow shaft 86 arranged concentrically thereto. The coupling shaft 84 has, for example, projections on its outer circumference, which cooperate with recesses in the inner circumference of the hollow shaft 86. The recesses are larger than the projections, so that a game is formed between them and rotation relative to one another by a certain angle is made possible. For example, the inner coupling shaft 84 is connected to one section of the shaft 44 and the outer hollow shaft 86 is connected to the other section of the shaft 44, so that a certain relative rotation of the shaft sections is permitted in order to allow a certain misalignment of the grinding rollers 12, 14.

BezugszeichenlisteReference symbol list

1010
Walzenmühleroller mill
1212
erste Mahlwalzefirst grinding roller
1414
zweite Mahlwalzesecond grinding roller
1616
MahlspaltGrinding gap
1818
Walzengrundkörperroller base body
2020
Walzengrundkörperroller base body
2222
Antriebswelledrive shaft
2424
Antriebswelledrive shaft
2626
LoslagereinheitFloating bearing unit
2828
FestlagereinheitFixed bearing unit
2929
MaschinenrahmenMachine frame
3030
Lagercamp
3232
Lagercamp
3434
Lagercamp
3636
Lagercamp
3838
HydraulikaktuatorHydraulic actuator
4040
HydraulikaktuatorHydraulic actuator
4242
GleichlaufeinrichtungSynchronization device
4444
WelleWave
4646
Hebellever
4848
Hebellever
5050
BefestigungsmittelFasteners
5252
BefestigungsmittelFasteners
5454
Schubstangepush rod
5656
Schubstangepush rod
5858
Befestigungselementfastener
6060
Befestigungselementfastener
6262
KopplungselementCoupling element
6464
KopplungselementCoupling element
6666
DämpfereinheitDamper unit
6868
DämpfereinheitDamper unit
7070
GaskammerGas chamber
7272
HydraulikkammerHydraulic chamber
7474
KolbenPistons
7676
GaskammerGas chamber
7878
HydraulikkammerHydraulic chamber
8080
KolbenPistons
8282
KopplungselementCoupling element
8484
KopplungswelleCoupling shaft
8686
Hohlwellehollow shaft

Claims (11)

  1. A roller mill (10) for comminuting bulk material, having
    a first grinding roller (12) and a second grinding roller (14), which are arranged opposite one another and can be driven in opposite directions, wherein a grinding gap (16) is formed between the grinding rollers (12, 14), and
    a floating bearing unit (26) for receiving the first grinding roller (12) and a fixed bearing unit (28) for receiving the second grinding roller (14), wherein the floating bearing unit (26) has two bearings (34, 36), each of which receives one end of the first grinding roller (12),
    wherein a plurality of hydraulic actuators (38, 40) are mounted on the floating bearing unit (26) for the purpose of applying a force to the floating bearing unit (26), and
    wherein the bearings (34, 36) of the floating bearing unit (26) are connected to one another via a synchronization device (42),
    characterized in that
    the synchronization device (42) has a coupling element (62, 64; 82) which, in a coupling position, prevents a relative movement of the bearings (34, 36) and, in a free position, permits a relative movement of the bearings (34, 36).
  2. The roller mill (10) as claimed in claim 1, wherein the synchronization device (42) has a rotatable shaft (44) and at least two thrust rods (54, 56),
    wherein a respective end of the thrust rods (54, 56) is connected to the shaft (44) and the respective other end is connected to the floating bearing unit (26), wherein the thrust rods (54, 56) and/or the shaft (44) comprises the coupling element (62, 64; 82).
  3. The roller mill (10) as claimed in claim 1, wherein the synchronization device (42) has a rotatable shaft (44) and at least two thrust rods (54, 56),
    wherein a respective end of the thrust rods (54, 56) is connected to the shaft (44) and the respective other end is connected to a respective bearing (34, 36) of the floating bearing unit (26), wherein the thrust rods (54, 56) are connected to the respective bearing (34, 36) of the floating bearing unit (26) and/or the shaft (44) via the coupling element (62, 64) in each case.
  4. The roller mill (10) as claimed in one of the preceding claims, wherein the coupling element (62, 64) comprises a linear guide.
  5. The roller mill (10) as claimed in claim 4, if dependent on one of the preceding claims 2 or 3, wherein the linear guide has a stop for delimiting the relative movement of the bearing (34, 36) with respect to the thrust rod (54, 56).
  6. The roller mill (10) as claimed in claim 4, if dependent on one of the preceding claims 2, 3 and 5 wherein the coupling element (62, 64) is arranged at least partially in the thrust rod (54, 56) and wherein each thrust rod (54, 56) has at least one coupling element (62, 64).
  7. The roller mill (10) as claimed in one of the preceding claims, wherein the coupling element (62, 64) comprises a hydraulic actuator.
  8. The roller mill (10) as claimed in claim 7, wherein the roller mill (10) has two coupling elements (62, 64), which are hydraulically connected to one another.
  9. The roller mill (10) as claimed in claim 2 or 3 or as claimed in claims 4 to 8, if dependent onone of the preceding claims 2 or 3, wherein the coupling element (62, 64) comprises a hollow cylinder which is formed in an end region of the thrust rod (54, 56).
  10. The roller mill (10) as claimed in claim 2, wherein the shaft (44) has a first shaft portion and a second shaft portion which are connected to one another via the coupling element (82).
  11. The roller mill (10) as claimed in claim 10, wherein the coupling element (82) is in the form of a claw coupling.
EP21703285.3A 2020-02-14 2021-02-09 Roller mill with a synchronising device Active EP4103328B1 (en)

Applications Claiming Priority (3)

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DE102020201892.8A DE102020201892A1 (en) 2020-02-14 2020-02-14 Roller mill with a synchronizing device
BE20205092A BE1028057B1 (en) 2020-02-14 2020-02-14 Roller mill with a synchronizing device
PCT/EP2021/053044 WO2021160592A1 (en) 2020-02-14 2021-02-09 Roller mill with a synchronizing device

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EP4103328C0 EP4103328C0 (en) 2023-10-25
EP4103328B1 true EP4103328B1 (en) 2023-10-25

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US (1) US12109574B2 (en)
EP (1) EP4103328B1 (en)
CN (1) CN114867560B (en)
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CN114471823A (en) * 2021-12-25 2022-05-13 萍乡市福瑞精密机械有限公司 Chemical raw material processing is with equipment of milling

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3705050A1 (en) * 1987-02-18 1988-09-01 Kloeckner Humboldt Deutz Ag Two-roller machine, such as a roller press
DE3922638A1 (en) * 1989-07-10 1991-01-17 Kloeckner Humboldt Deutz Ag Twin-roller press esp. for granular material milling - has controller which reduces hydraulic cylinder pressure at end of sliding roller where gap is insufficient
DE3930773A1 (en) 1989-09-14 1991-03-28 Krupp Industrietech Roll crusher with movable bearing - uses switching valves to interconnect cylinder space diagonally for immediate bearing yield
DE102008010652B3 (en) 2008-02-22 2009-11-05 Polysius Ag Power transmission system and roller mill
DE102010016472C5 (en) 2010-04-16 2017-11-23 Thyssenkrupp Industrial Solutions Ag roller mill
DE102010024231B4 (en) * 2010-06-18 2015-02-12 Khd Humboldt Wedag Gmbh Roller press with moment scale
DE102010038197B4 (en) * 2010-10-14 2012-08-30 Thyssenkrupp Polysius Ag Roller mill for shredding brittle regrind
DE102012101489B4 (en) 2012-02-24 2016-04-28 Thyssenkrupp Industrial Solutions Ag Vertical roller mill and method of operating a vertical roller mill
CN102784680A (en) * 2012-09-07 2012-11-21 江苏中兴药业有限公司 Roll crusher
DE102013104097A1 (en) * 2013-04-23 2014-10-23 Thyssenkrupp Industrial Solutions Ag rolling mill
DE102014104038B4 (en) 2014-03-24 2017-04-06 Thyssenkrupp Ag roller Press
CN105797809B (en) * 2016-03-29 2018-06-22 中国矿业大学 The device and method that a kind of crusher's rollers gap adaptively adjusts
CN109482265B (en) * 2017-09-10 2020-12-11 南京梅山冶金发展有限公司 Method and device for controlling parallelism between pair rollers of crusher based on displacement control mode
SE541957C2 (en) 2017-11-10 2020-01-14 Metso Sweden Ab A deflection distributor refitting kit, a method for mounting and a roller crusher comprising such kit
WO2019093956A1 (en) 2017-11-10 2019-05-16 Metso Sweden Ab A deflection distributor refitting kit for a roller crusher, a roller crusher and method for mounting such kit
CN110142089B (en) * 2019-06-25 2021-09-28 绍兴文理学院 Fixed effectual high pressure grinding roller

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