EP2408565B1 - Hydraulikanordnung für wälzmühlen - Google Patents
Hydraulikanordnung für wälzmühlen Download PDFInfo
- 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.)
- Active
Links
- 239000000463 material Substances 0.000 claims description 5
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims 2
- 230000001105 regulatory effect Effects 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000000725 suspension Substances 0.000 description 36
- 239000003921 oil Substances 0.000 description 13
- 239000010720 hydraulic oil Substances 0.000 description 9
- 238000003860 storage Methods 0.000 description 9
- 239000007789 gas Substances 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000002411 adverse Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C15/04—Mills with pressed pendularly-mounted rollers, e.g. spring pressed
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.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
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 (de) | 2009-03-19 | 2010-03-12 | Hydraulikanordnung für wälzmühlen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2408565A1 EP2408565A1 (de) | 2012-01-25 |
EP2408565B1 true EP2408565B1 (de) | 2012-05-23 |
Family
ID=42342592
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10713306A Active EP2408565B1 (de) | 2009-03-19 | 2010-03-12 | Hydraulikanordnung für wälzmühlen |
Country Status (10)
Country | Link |
---|---|
EP (1) | EP2408565B1 (pt) |
JP (1) | JP5417526B2 (pt) |
CN (1) | CN102348509B (pt) |
BR (1) | BRPI1009903A2 (pt) |
DE (1) | DE202009004025U1 (pt) |
DK (1) | DK2408565T3 (pt) |
EA (1) | EA022509B1 (pt) |
ES (1) | ES2388598T3 (pt) |
PL (1) | PL2408565T3 (pt) |
WO (1) | WO2010105783A1 (pt) |
Cited By (1)
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 (6)
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 |
EP2903744B1 (de) * | 2014-03-21 | 2017-02-22 | Loesche GmbH | Verfahren und vorrichtung zum aufbereiten und trennen eines materials aus einem verbundenen mehrstoffsystem |
JP7279641B2 (ja) * | 2017-11-16 | 2023-05-23 | Ubeマシナリー株式会社 | 竪型粉砕機、及び、竪型粉砕機の粉砕ローラ圧力制御方法 |
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 |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB943450A (en) * | 1961-01-20 | 1963-12-04 | Ernst Guenter Loesche | Ring mill with hydro-pneumatic springing |
DD106953A1 (pt) | 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 |
GB2089239A (en) * | 1980-12-17 | 1982-06-23 | Smidth & Co As F L | Vertical roller mill |
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 |
JPH0957134A (ja) * | 1995-08-24 | 1997-03-04 | Babcock Hitachi Kk | ローラミル |
DE19603655A1 (de) | 1996-02-01 | 1997-08-07 | Loesche Gmbh | Wälzmühle |
US7028934B2 (en) * | 2003-07-31 | 2006-04-18 | F. L. Smidth Inc. | Vertical roller mill with improved hydro-pneumatic loading system |
EP1675683B1 (de) | 2003-09-12 | 2011-03-02 | Loesche GmbH | Verfahren zum Betreiben einer Wälzmühle und Verfahren zur Herstellung von Zement |
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*** |
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*** |
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 |
-
2009
- 2009-03-19 DE DE202009004025U patent/DE202009004025U1/de not_active Expired - Lifetime
-
2010
- 2010-03-12 EA EA201101289A patent/EA022509B1/ru not_active IP Right Cessation
- 2010-03-12 CN CN201080012021.5A patent/CN102348509B/zh not_active Expired - Fee Related
- 2010-03-12 EP EP10713306A patent/EP2408565B1/de active Active
- 2010-03-12 WO PCT/EP2010/001592 patent/WO2010105783A1/de active Application Filing
- 2010-03-12 BR BRPI1009903A patent/BRPI1009903A2/pt not_active IP Right Cessation
- 2010-03-12 ES ES10713306T patent/ES2388598T3/es active Active
- 2010-03-12 PL PL10713306T patent/PL2408565T3/pl unknown
- 2010-03-12 DK DK10713306.8T patent/DK2408565T3/da active
- 2010-03-12 JP JP2012500128A patent/JP5417526B2/ja not_active Expired - Fee Related
Cited By (2)
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 |
---|---|
WO2010105783A1 (de) | 2010-09-23 |
ES2388598T3 (es) | 2012-10-16 |
DE202009004025U1 (de) | 2010-08-12 |
CN102348509A (zh) | 2012-02-08 |
CN102348509B (zh) | 2014-07-02 |
PL2408565T3 (pl) | 2012-09-28 |
EP2408565A1 (de) | 2012-01-25 |
BRPI1009903A2 (pt) | 2016-03-15 |
EA201101289A1 (ru) | 2012-02-28 |
JP5417526B2 (ja) | 2014-02-19 |
JP2012520976A (ja) | 2012-09-10 |
EA022509B1 (ru) | 2016-01-29 |
DK2408565T3 (da) | 2012-08-13 |
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