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EP2408565B1 - Agencement hydraulique pour broyeurs à rouleaux - Google Patents

Agencement hydraulique pour broyeurs à rouleaux Download PDF

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Publication number
EP2408565B1
EP2408565B1 EP10713306A EP10713306A EP2408565B1 EP 2408565 B1 EP2408565 B1 EP 2408565B1 EP 10713306 A EP10713306 A EP 10713306A EP 10713306 A EP10713306 A EP 10713306A EP 2408565 B1 EP2408565 B1 EP 2408565B1
Authority
EP
European Patent Office
Prior art keywords
hydraulic
grinding
unit
roller
spring
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.)
Not-in-force
Application number
EP10713306A
Other languages
German (de)
English (en)
Other versions
EP2408565A1 (fr
Inventor
Dirk Grube
Michael Keyssner
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.)
Loesche GmbH
Original Assignee
Loesche 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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=42342592&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2408565(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Loesche GmbH filed Critical Loesche GmbH
Priority to PL10713306T priority Critical patent/PL2408565T3/pl
Publication of EP2408565A1 publication Critical patent/EP2408565A1/fr
Application granted granted Critical
Publication of EP2408565B1 publication Critical patent/EP2408565B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/04—Mills with pressed pendularly-mounted rollers, e.g. spring pressed

Definitions

  • the invention relates to a hydraulic arrangement of a roller mill according to the preamble of claim 1.
  • the invention is intended for Wälzmühlen in which comminuted between a rotating horizontal grinding track of a grinding bowl or a grinding table and stationary, rolling mill grinders and which as overflow mills with the Mahlteller- or Mahlschüsselrand down falling, crushed millbase or formed as air flow Wälzmühlen are in which the comminuted material to be ground in an air or gas stream is fed to a particular integrated classifier.
  • the invention is suitable for large Wälzmühlen, which for example have a grinding bowl diameter of 2 m and more and three, four or six grinding rollers.
  • Roller mills with a grinding bowl diameter of 4.1 and 4.3 m, for example, are known, on which four or six grinding rollers roll.
  • Air-jet rolling mills of the LOESCHE type with two, three, four or six grinding rollers are advantageously constructed in modular construction and, for example, made DE 31 00 341 A1 . DE 10 2004 062 400 B4 .
  • Components of the modular design are grinding roller, rocker arm, in which the grinding roller axis is mounted, stand, on which the rocker arm is pivotally mounted, and a hydropneumatic suspension for generating the contact pressure or grinding pressure.
  • the hydropneumatic suspension has a suspension unit per grinding roller with one or two hydraulic cylinders depending on the size of the roller, gas / oil reservoir and a hydraulic supply system, which is connected via pipelines and high-pressure hoses with the suspension unit.
  • Pumps, valves, shut-off devices, a control and operating elements of the hydraulic supply system allow the realization of different operating conditions of the hydraulic cylinder and thus raising the grinding rollers as a result of grinding bed based on the grinding, a lowering, for example in a grinding bed valley and lifting the grinding roller from the grinding path at the start of the mill drive, wherein in each case the working pressure or the back pressure is increased or decreased.
  • FIG. 6 shows a hydraulic scheme of a four-roll mill with the grinding rollers 1 to 4 and two hydraulic cabinets 5, 6.
  • Ring lines 7, 8 which are usually laid around the mill foundation, connect the respective grinding rollers 1, 3 and 2, 4 with each other, and in each case a stub 9 leads to the associated hydraulic cabinet 5, 6th
  • the grinding rollers are also raised hydraulically out of engagement with the material to be ground when the pumps are started and the oil pressure in the lower cylinder chambers is increased. Due to different resistances, the grinding rolls lift successively, that is, the second grinding roller device only after a period of about one and a half minutes out of engagement with the material to be ground, in which case the first grinding roller has already reached an upper mechanical stop. Only then, however, is the smooth running of the roller mill restored. The lifting time of about one and a half minutes results from the selected pump capacity of the hydraulic supply unit and the volume to be replenished in the suspension cylinders and gas / oil reservoirs.
  • the invention has for its object to eliminate by a hydraulic arrangement, the identified adverse effects on the smoothness and throughput and to ensure a nearly constant crushing force or a uniform contact pressure of the grinding rollers. At the same time, the Manufacturing and assembly costs, in particular for the pipelines are lowered, and the risk of failure of the components of the hydraulic system minimized and the maintenance and replacement of components or the entire system can be improved.
  • a basic idea of the invention can be seen in the fact that, instead of the previous system with one hydraulic cabinet per pair of rollers and the necessary connection pipes and high-pressure hoses to the suspension units of the grinding rollers with one or two hydraulic cylinders each grinding roller or its suspension unit to assign a hydraulic supply unit as a compact unit, wherein in this compact unit all necessary supply and control components are integrated.
  • a storage stall which advantageously has hydraulic bladder accumulator and hydraulic piston accumulator as a compact unit, can also be integrated in the hydraulic supply unit.
  • each suspension unit of a grinding roller of the roller mill is assigned its own hydraulic supply unit as a compact hydraulic system and a storage unit and arranged close to the location so that the necessary connections can be realized with the aid of relatively short pipes and high-pressure hoses.
  • each hydraulic supply unit can be designed as a compact hydraulic unit and preassembled under dust-free ambient conditions, so that this preassembled compact unit, preferably accommodated in a hydraulic cabinet, only has to be connected on site. This largely avoids soiling and reduces the risk of failure.
  • each hydraulic cabinet fitted with the pre-assembled compact hydraulic on an oil tank lifted off this and thus can be replaced in a particularly simple manner and with a relatively small amount of time, if necessary.
  • the pipes or high-pressure hoses between the suspension cylinders and the hydraulic cabinet, in which the pump unit, controls, valves, shut-off valves and controls are included for switching the operating conditions of the suspension units or grinding rollers are significantly reduced in their lengths and disadvantageous pipe manifold, which in the hydraulic system with a Hydraulic cabinet per pair of rollers and a loop were required are largely avoided.
  • the hydraulic system according to the invention provides in particular that the hydraulic cabinet with the compact hydraulic in the direct line of the outlets of the suspension cylinder or the suspension cylinder of a grinding roller is arranged so that the hydraulic oil can oscillate almost without deflection in bends and thus low resistance.
  • the advantages of the hydraulic arrangement according to the invention are improved smoothness, increase in throughput and almost constant crushing forces among the grinding rolls of a roller mill and in addition to reducing the manufacturing and assembly costs, in particular with regard to the pipes to be laid, a low risk of failure of the components of the hydraulic supply units due to pre-assembled and easily replaceable hydraulic supply unit.
  • Fig. 1 shows a hydropneumatic suspension system 10 for a LOESCHE type airflow roller mill in modular design. According to the invention, each grinding roller (not shown) is associated with a suspension unit 11.
  • each grinding roller depending on the size of the roller modules and thus in particular the grinding rollers on one or two hydraulic cylinders 12, which are connected via rocker arm 13 with the grinding rollers (not shown).
  • the hydraulic cylinders 12 are each articulated via a hinge eye 14 with a stand 21 or mill base and a rod end 15 on the rocker arm 13.
  • Each suspension unit 11 of a grinding roller is assigned its own hydraulic supply unit 20.
  • the hydraulic supply unit 20 includes motor-driven pumps, valves and shut-off devices, a grinding pressure control system and an electronic controller and controls for switching the various operating states of the roller suspension.
  • the hydraulic supply unit 20 is accommodated in a hydraulic cabinet 25 in a service-friendly manner, wherein it is particularly advantageous that the required pumps, valves and shut-off devices (not shown) are preassembled so that each hydraulic supply unit 20 is designed as a compact hydraulic system.
  • the entire hydraulic cabinet 25 with the compact hydraulic system is arranged directly on an oil tank 26, so that the compact hydraulic, for example, for larger repairs, can be easily and quickly lifted from the oil tank 26 and replaced by a unit of identical construction.
  • a storage stand 22 has four hydraulic piston accumulator 16, of which in the side view of Fig. 1 only one hydraulic piston accumulator can be seen, as well as 2 x four hydraulic bladder accumulators 17 on, of which in Fig. 1 only two can be seen.
  • Hydraulic piston accumulator 16 and hydraulic bladder accumulator 17 are combined in the accumulator 22 as a compact unit and connected via pipes 23 to the associated hydraulic cabinet 25.
  • Fig. 1 and also Fig. 5 show that the storage level 22, based on the roller module with stator 21, suspension unit 11 and grinding roller (not shown), in front of the hydraulic cabinet 25 and in direct line with this and the suspension unit 11 is arranged.
  • Fig. 2 shows a hydraulic cylinder 12, in which a piston 18 is guided with piston rod 19.
  • each hydraulic cylinder 12 On a piston rod side 28 each hydraulic cylinder 12 is in the installed state with a working pressure system A and the hydraulic bladder 17 and on a piston side 29 with a back pressure system G and a hydraulic piston accumulator 16 via hydraulic hoses 24 connected (see Fig.1 ).
  • Fig. 3 shows a hydraulic piston accumulator 16 with a piston 31 which separates a gas volume 32 in the upper region of hydraulic oil 33 in the lower region.
  • the in Fig. 4 shown hydraulic bladder accumulator 17 has a rubber bladder 35 and hydraulic oil 36, the level of which as well as that of the piston 31 in the shown Hydraulic piston accumulator 16 of Fig. 3 and the piston 18 in the hydraulic cylinder 12 of the Fig. 2 is determined by the operation of the hydropneumatic suspension and in the FIGS. 2 to 4 is reproduced by way of example only.
  • the grinding rollers are lifted by the millbase lying on the mill bowl.
  • the swing lever 13 are madeienkt.
  • the pistons 18 of the hydraulic cylinders 12 move upwards and displace oil into the working pressure system A into the hydraulic bladder accumulators 17 of the associated storage rack 22 (see FIG Fig.1 ).
  • the nitrogen-filled storage bladder 35 (see Fig. 4 ) in the bladder accumulators 17 is compressed by the inflowing oil.
  • the grinding rollers can be lifted hydraulically from the grinding bed.
  • this is possible simultaneously or almost simultaneously.
  • a hydraulic system according to the invention for a six-roll mill in modular design is shown very schematically.
  • the six stands 21 and the six hydraulic supply units 20, storage levels 22 and suspension units 11 of the six hydropneumatic suspension systems 10 are only indicated.
  • Fig. 5 conveys that the pipes 23 (see also Fig. 1 ) between the storage stand 22 and the associated hydraulic supply system 20 and the high-pressure hoses 24 between the storage stand 22 and the hydraulic cylinders 12
  • Each hydropneumatic spring system 10 are relatively short and therefore pipe manifolds can be omitted.
  • the hydraulic cabinet 25 of the hydraulic supply unit 20 of each hydropneumatic suspension system 10 is in direct line with the hydraulic cylinders 12, which is why the hydraulic oil can oscillate with little resistance.
  • a uniform load of the respective opposing grinding rollers on the transmission (not shown) without a hydraulic loop to avoid possible bearing failure is achieved with an electrical control / regulation (not shown), in which the respective oil pressures in the opposite suspension units by means of sensors (not shown ) and kept within a relatively small tolerance around a setpoint. If it falls below the value, the pump is started in the respective hydraulic cabinet and the respective drain valve is opened for a short time. In this way, an effective pressure equalization is achieved.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)

Abstract

L'invention concerne un agencement hydraulique pour broyeurs à rouleaux, avec une unité d'amortissement (11) pour chaque rouleau, des accumulateurs de gaz/d'huile (16/17) ainsi que des systèmes d'alimentation hydraulique pour commander les états de fonctionnement des unités d'amortissement ou des rouleaux. Afin d'assurer une pression de concassage pratiquement constante ou une pression d'appui uniforme des rouleaux, simultanément de réduire les coûts de fabrication et de montage ainsi que le risque de panne des composants du système hydraulique et de faciliter le remplacement de composants ou du système dans son ensemble, selon l'invention chaque unité d'amortissement d'un rouleau est associée à et disposée à faible distance d'une unité d'alimentation hydraulique (20) propre, prenant la forme d'un système hydraulique compact, ainsi qu'un accumulateur (22), si bien que l'on peut réaliser les liaisons nécessaires à l'aide de conduites tubulaires (23) et de flexibles haute pression (24) relativement courts. Chaque unité d'alimentation hydraulique peut être pré-assemblée dans des conditions ambiantes non poussiéreuses et être logée par exemple dans une armoire hydraulique (25), si bien qu'il suffit d'un raccordement sur le site.

Claims (5)

  1. Agencement hydraulique d'un broyeur à cylindres, dans lequel des cylindres de broyage roulent sur un plateau de broyage rotatif et sur un lit de broyage formé au-dessus par du produit à broyer et sont pressés élastiquement sur le produit à broyer à l'aide d'un système de suspension hydropneumatique (10),
    dans lequel à chaque cylindre de broyage est associé un système de suspension hydropneumatique (10) avec une unité de suspension (11) et au moins un vérin hydraulique (12), et
    chaque système de suspension hydropneumatique (10) comprend, outre l'unité de suspension (11), sa propre unité d'alimentation hydraulique (20) et son propre accumulateur (22), qui sont placés l'un près de l'autre et près de l'unité de suspension (11) et sont reliés entre eux ou bien avec l'unité de suspension (11) par des conduites courtes,
    caractérisé
    en ce que les vérins hydrauliques (12) des systèmes de suspension hydropneumatique (10) peuvent être chargés des deux côtés,
    en ce que chaque unité d'alimentation hydraulique (20) est conformée en unité hydraulique compacte et est logée dans une armoire hydraulique (25) de façon prémontée et facile d'entretien, chaque armoire hydraulique (25) avec l'accumulateur (22) associé étant placée et reliée en ligne directe avec l'unité de suspension (11) d'un cylindre de broyage, et
    en ce que chaque accumulateur (22), qui comprend un accumulateur hydraulique à piston (16) et un accumulateur hydraulique à vessie (17), est conformé en unité compacte et est placé en ligne directe avec l'unité de suspension associée (11) d'un cylindre de broyage et est disposé par l'intermédiaire de conduits hydrauliques courts (24) ainsi que directement devant l'armoire hydraulique (25), à laquelle il est relié par des conduites courtes (23).
  2. Agencement hydraulique selon la revendication 1, caractérisé en ce que chaque armoire hydraulique (25) est placée sur un réservoir d'huile (26) et peut être retirée du réservoir d'huile (26) et remplacée.
  3. Agencement hydraulique selon l'une quelconque des revendications 1 ou 2, caractérisé en ce qu'un système de régulation de la pression de broyage est prévu, avec lequel une pression quasi uniforme des cylindres de broyage d'un broyeur à cylindres, au moins des cylindres de broyage mutuellement opposés, peut être ajustée.
  4. Agencement hydraulique selon la revendication 3, caractérisé en ce que le système de régulation de la pression de broyage comprend, au niveau des unités de suspension, des capteurs pour mesurer la pression de l'huile.
  5. Agencement hydraulique selon l'une quelconque des revendications précédentes, caractérisé en ce que chaque vérin hydraulique (12) d'une unité de suspension (11) est relié au cylindre de broyage associé par l'intermédiaire d'un levier oscillant de cylindre de broyage (13), une tige (19) de piston d'un piston (18) placé dans le vérin hydraulique (12) étant fixée, par l'intermédiaire d'une tête (15) de tige, de manière articulée au levier oscillant (13) et au vérin hydraulique (12) par l'intermédiaire d'un oeillet articulé (14) sur la partie inférieure du broyeur ou sur le bâti (21) d'un module à cylindres.
EP10713306A 2009-03-19 2010-03-12 Agencement hydraulique pour broyeurs à rouleaux Not-in-force EP2408565B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10713306T PL2408565T3 (pl) 2009-03-19 2010-03-12 Układ hydrauliczny młynów krążnikowych

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202009004025U DE202009004025U1 (de) 2009-03-19 2009-03-19 Hydraulikanordnung für Wälzmühlen
PCT/EP2010/001592 WO2010105783A1 (fr) 2009-03-19 2010-03-12 Agencement hydraulique pour broyeurs à rouleaux

Publications (2)

Publication Number Publication Date
EP2408565A1 EP2408565A1 (fr) 2012-01-25
EP2408565B1 true EP2408565B1 (fr) 2012-05-23

Family

ID=42342592

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10713306A Not-in-force EP2408565B1 (fr) 2009-03-19 2010-03-12 Agencement hydraulique pour broyeurs à rouleaux

Country Status (10)

Country Link
EP (1) EP2408565B1 (fr)
JP (1) JP5417526B2 (fr)
CN (1) CN102348509B (fr)
BR (1) BRPI1009903A2 (fr)
DE (1) DE202009004025U1 (fr)
DK (1) DK2408565T3 (fr)
EA (1) EA022509B1 (fr)
ES (1) ES2388598T3 (fr)
PL (1) PL2408565T3 (fr)
WO (1) WO2010105783A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012107729A1 (de) * 2012-08-22 2014-02-27 GFB Gesellschaft für Bemessungsforschung mbH Mahlvorrichtung

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010012893A1 (de) * 2010-03-26 2011-09-29 Loesche Gmbh Rollenmühle
DE102010031442A1 (de) * 2010-07-16 2012-01-19 Hitachi Power Europe Gmbh Spannsystem, insbesondere hydropneumatisches Spannsystem, einer Wälzmühle
RU2648705C2 (ru) * 2014-03-21 2018-03-28 Лёше Гмбх Способ и устройство для обработки и выделения материала из комбинированной многокомпонентной системы
WO2019097998A1 (fr) * 2017-11-16 2019-05-23 宇部興産機械株式会社 Broyeur vertical et procédé de commande de pression de rouleau de broyage pour broyeur vertical
CN109127005B (zh) * 2018-08-31 2021-06-29 江苏鹏飞集团股份有限公司 互相备用的多辊水泥立式辊磨机
DE102018123508A1 (de) 2018-09-25 2020-03-26 Mitsubishi Hitachi Power Systems Europe Gmbh Spannsystem einer Wälzmühle mit einer modularen Hydraulikspeichereinheit
CN112044532B (zh) * 2019-06-05 2025-03-25 莱歇研磨机械制造(上海)有限公司 一种具有液压加载与调节系统的辊式磨机

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GB943450A (en) * 1961-01-20 1963-12-04 Ernst Guenter Loesche Ring mill with hydro-pneumatic springing
DD106953A1 (fr) 1973-10-09 1974-07-12
US4372496A (en) * 1980-10-01 1983-02-08 Combustion Engineering, Inc. Electronic controller of hydraulic pressure for journal loading of bowl mill
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DE3100341A1 (de) 1981-01-08 1982-07-22 Loesche GmbH, 4000 Düsseldorf Walzenmuehle, insbesondere fuer die kohlenvermahlung
FR2614665B3 (fr) * 1987-04-28 1989-11-17 Errta Sarl Ressort hydropneumatique de compression a effort reglable ou asservi
JPH06316292A (ja) * 1993-05-07 1994-11-15 Mitsubishi Heavy Ind Ltd 非常操舵装置付き油圧式操舵システム
JP2561167Y2 (ja) * 1993-05-07 1998-01-28 株式会社島津製作所 油圧装置
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US7028934B2 (en) * 2003-07-31 2006-04-18 F. L. Smidth Inc. Vertical roller mill with improved hydro-pneumatic loading system
PL1675683T3 (pl) 2003-09-12 2011-06-30 Loesche Gmbh Sposób użytkowania młyna krążnikowego i sposób produkcji cementu
DE102004062400B4 (de) 2004-12-23 2006-10-26 Loesche Gmbh Wälzmühle in Modulbauweise
CN1307002C (zh) * 2005-04-28 2007-03-28 沈阳重型机械集团有限责任公司 辊盘式磨煤机液压变加载系统
CN2805926Y (zh) * 2005-07-07 2006-08-16 北京中冶迈克液压有限责任公司 立式磨机液压加压系统
CN201006445Y (zh) * 2007-02-15 2008-01-16 辽阳新力源电站矿山设备有限公司 大型立式辊磨机囊式液压缸

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012107729A1 (de) * 2012-08-22 2014-02-27 GFB Gesellschaft für Bemessungsforschung mbH Mahlvorrichtung
US9844784B2 (en) 2012-08-22 2017-12-19 GBF Gesellschaft Fuer Bemessungfsforschung MBH Grinding device

Also Published As

Publication number Publication date
PL2408565T3 (pl) 2012-09-28
DE202009004025U1 (de) 2010-08-12
BRPI1009903A2 (pt) 2016-03-15
ES2388598T3 (es) 2012-10-16
CN102348509B (zh) 2014-07-02
JP2012520976A (ja) 2012-09-10
EA022509B1 (ru) 2016-01-29
CN102348509A (zh) 2012-02-08
EP2408565A1 (fr) 2012-01-25
JP5417526B2 (ja) 2014-02-19
DK2408565T3 (da) 2012-08-13
WO2010105783A1 (fr) 2010-09-23
EA201101289A1 (ru) 2012-02-28

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