EP3552708A1 - Broyeur à cylindres et système de chariotage de cylindre pour un broyeur à cylindres - Google Patents

Broyeur à cylindres et système de chariotage de cylindre pour un broyeur à cylindres Download PDF

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Publication number
EP3552708A1
EP3552708A1 EP18166257.8A EP18166257A EP3552708A1 EP 3552708 A1 EP3552708 A1 EP 3552708A1 EP 18166257 A EP18166257 A EP 18166257A EP 3552708 A1 EP3552708 A1 EP 3552708A1
Authority
EP
European Patent Office
Prior art keywords
roller
roll
unit
turning
guide system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP18166257.8A
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German (de)
English (en)
Inventor
Andreas Treut
Sven Bayrl
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.)
Haendle Maschinen und Anlagenbau GmbH
Original Assignee
Haendle Maschinen und Anlagenbau GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Haendle Maschinen und Anlagenbau GmbH filed Critical Haendle Maschinen und Anlagenbau GmbH
Priority to EP18166257.8A priority Critical patent/EP3552708A1/fr
Publication of EP3552708A1 publication Critical patent/EP3552708A1/fr
Withdrawn legal-status Critical Current

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/02—Feeding devices
    • 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 roll mill and a roll turning system for such a roll mill.
  • roll mills are used for processing clays.
  • the coarse raw material is crushed to a grain size of up to 0.5 mm between two counter-rotating roll shells and thereby finely ground.
  • a gap whose gap width is adjustable.
  • a fixedly mounted on the machine frame referred to as a fixed roller roller and a relatively movable, designated as a Loswalze roller are provided as a rule.
  • the grain size of the milled material is adjusted across the gap width.
  • various hard materials e.g. Quartz, lime, pyrite, etc. included. These hard materials lead to wear of the roll shells. The wear is not uniform across the width of the roll mantles, but local leaching occurs and, consequently, an uneven nip along the roll mantles. However, a non-uniform gap along the width of the roll shells is the cause of an inhomogeneous quality of the clay material with regard to its degree of preparation.
  • the roll shells are using a Rolling lathe turned over, so that the desired cylindrical shape is restored. After overwinding the idler roller is approximated, for example via a swing mechanism of the hard roller, whereby again a constant and defined nip is achieved.
  • roller lathes are similar in structure to the usual, universally used lathes, as components of a base unit with a console and a guide system, a movable on the guide system support unit with a turning tool support and a drive for the feed movement in particular in the longitudinal direction, ie axially parallel to the roll shell exhibit.
  • All components, ie console, guide system, support unit and drive form a unit which can not be separated under operating conditions.
  • the total unit of the roll lathe has a weight of several hundred kilograms. Therefore, and due to the installation situation at the end customer with conveyor belts for the material supply, it is neither practical nor practicable to dismantle the roll lathe for the actual ordinary milling process from the rolling mill. For the same reasons, it is not practicable to provide for a rolling mill, only a single roll lathe and use this for turning off both roll coats. Consequently, the roll mills according to the prior art each have a roll turning system, which always comprises two complete roll lathe machines per roll mill, and one of which is always permanently mounted in the region of one roll. Accordingly, a high investment cost with disadvantages for the economy is required.
  • the above also leads to technical problems.
  • the grinding process is connected with partly strong vibrations.
  • the mechanical components, in particular the precise guides of the roll turning machines are strong which leads to damage over a longer period of time.
  • the mill lathe can be decoupled in the milling process compared to the rolling mill with various vibration damping systems.
  • such a vibration damping system must be put out of service for twisting the roll shells to ensure the required accuracy in this step. If the operator forgets to put the decoupling system back into operation after turning off, the roller lathe will be damaged very quickly due to vibrations in the grinding process.
  • the invention has for its object to simplify a generic roller mill and thereby increase their reliability.
  • a further object of the invention is to develop a generic roll-turning system such that reduced damage sensitivity is achieved with reduced system complexity.
  • a roller mill and a corresponding roller-turning system are provided, wherein the roller-turning system has exactly two base units, each with a guide system.
  • the one base unit is permanently mounted on the machine frame in the area of one roller each.
  • the roll-turning system further comprises only one support unit and only one drive unit, which are designed in a modular manner for mutual mounting on one of the two base units and also for disassembly thereof.
  • the rolling lathe system requires fewer components, namely with only one support unit instead of two, and with only one drive unit instead of two. Accordingly, the initial capital expenditure is significantly reduced.
  • the demountable components that is, the support unit and the drive unit are small and lightweight compared to a complete roll lathe, so that they can be easily handled by an operator. Assembly and disassembly are easily possible under the cramped operating conditions between rolling mill and conveyor belts. Consequently, during grinding, only the two base units remain on the machine frame, while the support unit and the drive unit are disassembled. The absence of their mass causes the guide systems to experience significantly reduced reaction loads under the vibration load of the milling operation.
  • the two roll shells are turned off sequentially.
  • the support unit and drive unit are mounted on one of the two base units.
  • a complete roller turning machine is formed, with which the first roll shell is turned off.
  • the support unit and the drive unit are converted from the first base unit to the second base unit, thereby completing a second roller turning machine.
  • the second roll shell is turned off, a disassembly of support unit and drive unit.
  • the machine frame remain only the two base units.
  • the roll mill is back in ready for operation. The grinding operation is continued, and all components of the rolling lathe system according to the invention are further protected against the inevitable vibration loads.
  • the guide system is formed from linear guides with linear rails and linear carriage, wherein the linear rails are releasably secured.
  • linear guides are referred to such guides in which a linear carriage rolls by means of a rolling bearing, in particular in the form of a recirculating ball bearing on the associated linear rail.
  • Such linear rails are compared to slides easier and smoother.
  • linear rails and linear carriages can be easily exchanged.
  • the guide system is formed of flat and prismatic guides with a flat rail, with a prism rail and with sliding guides, wherein the flat rail and / or the prism rail is releasably secured.
  • Load capacity and rigidity of the flat and prismatic guides are compared to Linear guides higher, so they can be given the appropriate operating loads preference.
  • deviating from the prior art, but provided here releasable attachment of the flat rail or the prism rail allows in the event of damage occurring easy interchangeability.
  • the base unit comprises a bracket for receiving the guide system and for releasable attachment to the machine frame. This allows on the one hand to carry out preparatory activities such as the mutual alignment of all parts of the guide away from the roll mill alone on the console, in which case mur nor the ready prepared console is to be mounted as a complete assembly on the machine frame. On the other hand, this makes it easier to retrofit existing roll mills.
  • the guide system has a guide carriage with a first adapter plate for detachably fastening the support unit, while the support unit is provided with a first counterplate corresponding to the first adapter plate.
  • Adapter plate and back plate are coordinated so that a precise mutual position alignment and yet a slight mechanical separation are ensured by suitable means such as dowel pins, zero point clamping system or the like.
  • Drive components or the like interlock precisely and without the need for adjustment.
  • the guide system remains completely stationary including its linear carriage or its sliding guides on the associated base unit, so that no consideration must be given to the guide system during assembly or during disassembly.
  • the guide system comprises a carriage with a second adapter plate for releasably securing the drive unit, and wherein the drive unit is provided with a second counter plate corresponding to the second adapter plate.
  • the mechanical interface or separation point to the system of Limited adapter plate and back plate so that a simple assembly and easy disassembly under the operating conditions of a roll mill are possible.
  • the roller-turning system has a lock case for the feed control of the guide carriage.
  • the lock case is part of the carriage, while the second adapter plate is arranged on the lock case. This leaves the lock case including its elaborate feed mechanism on the base system, so that the assembly or disassembly of the drive correspondingly simple.
  • Fig. 1 shows in a perspective overall view of an inventively designed roller mill with a machine frame also referred to as a roller mill, on which two counter-drivable rollers 2, 3 are mounted rotatably parallel to the axis.
  • the roller mill is used for grinding coarse ceramic materials, in particular alumina for the production of bricks or the like.
  • the rollers 2, 3 are almost completely enclosed by a housing 27. At the top of the housing 27 is an opening through which the two rollers 2, 3 are visible, and through which the ceramic mass to be processed is filled during operation and then ground between the two rollers 2, 3.
  • the second roller 3 is fixedly mounted on the machine frame 1, which is why it is also referred to as a hard roller.
  • the first roller 2 is designed as a so-called Loswalze. This means that it can be moved relative to the machine frame 1 by means of an adjusting mechanism 26 and is adjustable in its distance from the second roller 3. Between two rollers 2, 3 there is a gap, not shown, through which the ceramic material is moved. In the gap, the grinding of larger particles takes place to a dimension which is less than or equal to the gap width. About the adjustment of the roll distance by means of the adjusting mechanism 26, the gap width and thus the freeness are set.
  • both rollers 2, 3 are cylindrical in the desired state.
  • said gap between the two rollers 2, 3 running parallel to the axial direction has a constant width, resulting in a correspondingly uniform grinding result along the entire gap.
  • the grinding process also causes wear of only initially cylindrical surfaces of both rollers 2, 3. The wear is noticeable in the form of notches, grooves, grooves or the like, resulting in a deviation from the desired cylinder shape and thus to a deviation from the above mentioned constant gap width leads.
  • the roll mill comprises a roll turning system with which the peripheral surfaces of the rolls 2, 3 are machined or over turned from time to time.
  • both rollers 2, 3 are constructed in several parts in the embodiment shown, and both each comprise a not shown, radially inner hub unit.
  • the roller shells 28, 29 are covered in the usual grinding operation shown here by removable covers 24, 25.
  • effective for the grinding peripheral surfaces of the rollers 2, 3 are formed in the present embodiment by the peripheral surfaces of the respective roller shells 28, 29. Consequently, it is here also the peripheral surfaces of the roll shells 28, 29, which are over-turned if necessary.
  • the over-rotation can be done several times, each time although the desired cylindrical shape is restored, but also each time accompanied by a reduction in the wall thickness of the respective roll shell 28, 29 must be accepted. Once the wall thickness has fallen below a certain nominal size, the affected roll shell 28, 29 can be disassembled from said hub unit and replaced with a fresh copy. In the context of the invention, however, rolls 2, 3 without exchangeable roll mantle 28, 29 can also be used or considered.
  • the roller rotation system has exactly two base units 4, 5, each with a guide system 6.
  • the first base unit 4 is fixedly mounted on the machine frame 1 in the peripheral area of the first roller 2, while the second base unit 5 is fixedly mounted on the machine frame 1 in the peripheral area of the second roller 3.
  • the roll-turning system further comprises exactly one support unit 7 and exactly one drive unit 8, which are designed in a modular manner for mutual mounting on one of the two base units 4, 5 and also for disassembly thereof.
  • the support unit 7 comprises a support 21 for a turning tool 22 with a corresponding feed device.
  • the drive unit here comprises an electric motor 30, a gear 31 and an electrical connection unit 32.
  • the support unit 7 and the drive unit 8 are dismantled and set aside so that only the two base units 4, 5 remain on the machine frame 1.
  • the support unit 7 and the drive unit 8 are shown here as two separate units. But they can also be designed as an integrated unit and then assembled or disassembled together.
  • Fig. 2 shows in an enlarged detail representation, the first base unit 4 after Fig. 1 , Accordingly, here is the guide system 6 of linear guides with linear rails 9 and 10 linear carriage formed.
  • the two linear rails 9 are detachably screwed onto a console 14 and can be replaced if necessary.
  • the associated linear carriages 10 are part of a guide carriage 15, which also has a first adapter plate 16 and a lock case 20 with a second adapter plate 18.
  • the linear carriage 10 are screwed under the first adapter plate 16 and also interchangeable.
  • the guide carriage 15 is part of the stationary base unit 4.
  • the console 14 still carries a rack 23, in which a not-shown gear of the lock box 20 engages, if necessary, a feed of the carriage 15 in the direction of the guide system 6, that is axially parallel to the rollers 2, 3 to effect.
  • a rack 23 may also be provided a tension spindle or the like.
  • Fig. 4 shows in an enlarged detail representation of the second base unit 5 after Fig. 1 , Accordingly, here the guide system 6 deviating from the first base unit 4 of flat and prismatic guides with a flat rail 11, with a prism rail 12 and with sliding guides 13 is formed.
  • the flat rail 11 and the prism rail 12 are as well as the linear rails 9 detachably screwed onto a console 14 and can be replaced if necessary.
  • the associated sliding guides 13 are designed as in their geometry to the flat rail 11 and the prism rail 12 adapted sliding shoes, which analogous to the linear carriage to Fig. 2 screwed under the first adapter plate 16 and also are interchangeable.
  • the second base unit 5 agrees Fig. 4 with the first base unit 4 after Fig. 2 match.
  • the Fig. 3 . 5 still show the base units 4, 5 after the Fig. 2 . 4 which alternately, ie not simultaneously by means of the support unit 7 and the drive unit 8 after Fig. 1 are each completed to a roll lathe.
  • the support unit 7 rests with its first counter-plate 17 on the first adapter plate 16 of the guide carriage 15 and is aligned with respect to this not shown positioning elements such as dowel pins or the like.
  • An attachment can be done by means of screws or quick fasteners.
  • a combined positioning and mounting can be achieved by means of so-called zero-point clamping systems.
  • the drive unit 8 can be switched over the lock case 20 on the rack 23 to a driven feed of the support unit 7 with the turning tool 22 in the direction of the longitudinal axis of the guide system 6 according to an arrow 33 and thus axially parallel to the rollers 2, 3rd ( Fig. 1 . 6, 7 ).
  • two different base units 4, 5, namely once with linear guides and once with flat and prismatic guides, are shown.
  • a guide carriage 15 is provided as part of the respective stationary mounted guide system 6 in the embodiments shown.
  • the linear carriage 10 and the sliding guides 13 are here mounted on their respective guide carriage 15 and thus also part of the stationary built guide system 6. In the invention, it may also be appropriate, the linear carriage 10 and the sliding guides 13 directly to the support unit.
  • Fig. 1 the usual grinding operation is carried out with disassembled support unit 7 and disassembled drive unit 8.
  • the grinding operation generates considerable vibrations, which also affect the roll turning system in the form of inertial forces.
  • the remaining fixed to the machine frame 1 parts of the two guide systems 6 are here acted upon by the lack of the support unit 7 and the drive unit 8 only of relatively low inertial forces, and can therefore do without additional anti-vibration measures, vibration or the like.
  • the two rollers 2, 3, more precisely their two roller shells 28, 29 have to be turned off due to wear on the peripheral side
  • first the first base unit 4 according to Fig. 3 completed with the support unit 7 and the drive unit 8 to a roll lathe, as in the overview Fig. 6 is shown.
  • cover 24 is removed, so that the peripheral surface of the roll shell 28 of the first roller 2 is accessible to the spanned on the support unit 7 lathe tool 22.
  • the first roller 2 is now driven in rotation, while the support unit 7 is moved axially parallel along the peripheral surface by means of the drive unit 8.
  • the turning tool 22 is delivered to the roller surface so far that in this case a chip is lifted from the peripheral surface of the first roller 2.
  • the desired cylinder shape is restored.
  • Fig. 7 shows in a perspective view of this state, so that analogous to the first roller 2 according to Fig. 6 Subsequently, now the second roller 3 is turned off.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
EP18166257.8A 2018-04-09 2018-04-09 Broyeur à cylindres et système de chariotage de cylindre pour un broyeur à cylindres Withdrawn EP3552708A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18166257.8A EP3552708A1 (fr) 2018-04-09 2018-04-09 Broyeur à cylindres et système de chariotage de cylindre pour un broyeur à cylindres

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18166257.8A EP3552708A1 (fr) 2018-04-09 2018-04-09 Broyeur à cylindres et système de chariotage de cylindre pour un broyeur à cylindres

Publications (1)

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EP3552708A1 true EP3552708A1 (fr) 2019-10-16

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EP18166257.8A Withdrawn EP3552708A1 (fr) 2018-04-09 2018-04-09 Broyeur à cylindres et système de chariotage de cylindre pour un broyeur à cylindres

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3002699A1 (de) * 1979-10-11 1981-04-23 Pilatus-Schweissmaterial AG Schwarzenberg, Schwarzenberg Einrichtung zum abgleichen abgenuetzter walzen von feinwalzwerken der keramischen industrie
DE20218881U1 (de) * 2002-12-05 2003-03-06 Händle GmbH, 75417 Mühlacker Walzwerk zum Zerkleinern von Ausgangsmaterialien für keramische Erzeugnisse mit einer schwingungsgedämpft angebauten Walzendrehmaschine
CN103394706A (zh) * 2013-07-15 2013-11-20 庆阳市前进机械制造有限公司 对辊免拆卸修复车削机

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3002699A1 (de) * 1979-10-11 1981-04-23 Pilatus-Schweissmaterial AG Schwarzenberg, Schwarzenberg Einrichtung zum abgleichen abgenuetzter walzen von feinwalzwerken der keramischen industrie
DE20218881U1 (de) * 2002-12-05 2003-03-06 Händle GmbH, 75417 Mühlacker Walzwerk zum Zerkleinern von Ausgangsmaterialien für keramische Erzeugnisse mit einer schwingungsgedämpft angebauten Walzendrehmaschine
CN103394706A (zh) * 2013-07-15 2013-11-20 庆阳市前进机械制造有限公司 对辊免拆卸修复车削机

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