EP3714098B1 - Mahlvorrichtung - Google Patents
Mahlvorrichtung Download PDFInfo
- Publication number
- EP3714098B1 EP3714098B1 EP18789573.5A EP18789573A EP3714098B1 EP 3714098 B1 EP3714098 B1 EP 3714098B1 EP 18789573 A EP18789573 A EP 18789573A EP 3714098 B1 EP3714098 B1 EP 3714098B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shaft
- base plate
- axial
- rotating base
- rotating
- 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
- 238000000227 grinding Methods 0.000 title description 38
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 239000002657 fibrous material Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 4
- 238000007670 refining Methods 0.000 claims 3
- 239000000835 fiber Substances 0.000 description 9
- 239000000725 suspension Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/20—Methods of refining
- D21D1/30—Disc mills
- D21D1/303—Double disc mills
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/20—Methods of refining
- D21D1/30—Disc mills
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G5/00—Safety devices
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G9/00—Other accessories for paper-making machines
- D21G9/0009—Paper-making control systems
- D21G9/0018—Paper-making control systems controlling the stock preparation
Definitions
- the invention relates to a device for treating pulp with two grinding gaps arranged in a housing and radially flowed through by pulp, each of which is formed by a treatment tool rotating about an axis of rotation and a non-rotating treatment tool, the treatment tools each being attached to a base plate are, have a rotationally symmetrical shape and are arranged coaxially to one another, the two rotating treatment tools are fastened to a common base plate driven by a rotatably mounted shaft and are arranged between the two non-rotating treatment tools, the rotating base plate is fastened axially displaceably on the shaft and the width of the grinding gap can be changed via an axial displacement of at least one non-rotating base plate.
- the invention also relates to a method for operating this device.
- Such a device is known in particular from DE 100 66 175 B4 .
- the grinding strips are called knives and the grinding surfaces are formed by grinding sets.
- the refiners can be designed as disc refiners or cone refiners.
- the grinding clothing In order to achieve the desired fiber properties, in particular the degree of freeness, the grinding clothing must be adapted as best as possible to the fiber material to be treated, also in order to prevent excessive wear of the clothing.
- the treatment surfaces are formed by replaceable fittings that are screwed to the corresponding base plate because of the relatively rapid wear and tear.
- the object of the invention is therefore to reduce the wear and tear and the susceptibility to failure of grinding arrangements with as little effort as possible.
- the object was achieved in that the shaft is assigned a measuring unit for detecting the axial force acting on the shaft.
- the bearing of the shaft and the axial displaceability of the shaft against a force element can be very advantageously combined with one another via a measuring unit according to the invention for detecting the axial force acting on the shaft.
- this measuring unit should comprise an axial bearing arranged on the shaft, which is pressed by a force element supported on the housing against a stop on the shaft pointing in the direction of the axial force to be measured, with a sensor detecting the relative, axial position of the axial bearing to the housing.
- the preload by means of a force element also ensures the necessary minimum load on the axial bearing and improves the concentricity of the bearing.
- the axial bearing should be guided radially in a bearing housing coupled to the housing.
- non-rotating base plates can be done easily and safely by means of a screw jack.
- construction is simplified if a non-rotating base plate is axially adjustable by means of a screw jack and the other non-rotating base plate is fixed to the housing.
- the structure is simplified in the event that the shaft is guided into a gearbox coupled to a drive.
- the treatment tool and base plate can also be made in one piece.
- the axial displacement of the non-rotating base plate should be stopped when a predetermined axial force of the shaft is exceeded or the width of the grinding gap should even be increased by a corresponding axial displacement of the non-rotating base plate.
- changes in the axial force during operation also provide helpful information on the state of wear of the treatment tools.
- the treatment tools 4, 5 each have a rotationally symmetrical shape, the two circular ring-shaped grinding surfaces being arranged parallel and coaxially to one another.
- Both treatment tools 4, 5 of a grinding gap 2, 3 are each formed by a plurality of grinding plates which each extend over a circumferential segment of the corresponding grinding surface.
- the grinding plates result in a continuous grinding surface of the treatment tool 4, 5.
- the grinding plates and thus also the grinding surfaces are generally formed by a large number of essentially radially extending grinding strips and grooves in between.
- the treatment tools 4, 5 are each releasably attached to a base plate 6, 7 and can thus be easily changed.
- the two rotating treatment tools 5 are attached to a common base plate 7 driven by a rotatably mounted shaft 9.
- the rotating base plate 7 with its treatment tools 5 is accordingly located between the two non-rotating base plates 6 and its treatment tools 4.
- the fiber suspension to be milled reaches one of the two milling gaps 2, 3 via an inlet 18 through the center.
- the fiber suspension passes the interacting grinding surfaces of the grinding gaps 2, 3 radially outwards and collects in the adjoining annular space 19. While at least part of the fiber suspension treated in this way leaves this annular space 19 through an outlet, the other part of the fiber suspension can under certain circumstances pass through the Grooves of the non-rotating grinding surface flow back through a section of their length.
- the cross-section of the grinding bars also known as knives, is generally rectangular, but there are also other shapes.
- the top of these grinding bars that is to say the surfaces carrying the grinding edges, lie in the radial plane.
- the grooves running between the grinding bars also have a rectangular cross section and serve as flow channels for the fiber suspension.
- the groove depth is usually between 2 and 20 mm.
- the treatment gaps 2, 3 can run not only perpendicularly but also inclined to the axis of rotation 8, as in the case of cone refiners.
- the shaft 9 is driven by a drive via a transmission 17 which is present here, for example, in the housing 1 of the refiner and into which the shaft 9 extends.
- a non-rotating base plate 6 is axially adjustable by means of a screw jack 16 and the other non-rotating base plate 6 is connected to the housing 1.
- the rotating base plate 7 Since the rotating base plate 7 is axially displaceable on the shaft 9, it balances the pressure between the two grinding gaps 2, 3, so that a change in the total width of both grinding gaps 2, 3 also has an effect on the individual widths of both grinding gaps 2, 3.
- the rotating base plate 7 can reduce the pressure between the two grinding gaps 2,3 when the total width of both grinding gaps 2,3 is adjusted no longer compensate.
- the shaft 9 is mounted so as to be axially displaceable against a force element 12 in the form of a spring element.
- the force element 12 improves the concentricity of the axial bearing 11.
- the axial force F acting on the shaft 9 is measured by means of a measuring unit 10 assigned to the shaft 9.
- the measuring unit 10 for the axial force F comprises an axial bearing 11 which is arranged on the shaft 9 and which is fixed radially in a bearing housing 15 coupled to the housing 1.
- the axial bearing 11 is pressed by the force element 12 supported on the bearing housing 15 against a stop 13 of the shaft 9 pointing in the direction of the axial force 7 to be measured, a sensor 14 recording the relative, axial position of the axial bearing 11 to the bearing housing 15 and thus also recorded for housing 1 of the refiner.
- inductive sensors In particular, inductive sensors, load cells or the like can be used as sensor 14 in this demanding environment.
- the axial displacement of the non-rotating base plate 6 can be stopped when a predetermined axial force F of the shaft 9 is exceeded or, in the case of a very high axial force F, the total width of the grinding gaps 2, 3 can be stopped by a corresponding axial displacement of the non-rotating base plate 6 be enlarged.
- the treatment intensity of the pulp i.e. the grinding capacity in this case, is essentially determined by the specific drive power of the refiner.
- the width of the treatment gap 6 is therefore set in such a way that an optimal axial force F corresponding to the fibrous material to be treated and the desired parameters of the fibrous material after the treatment results.
Landscapes
- Paper (AREA)
- Crushing And Grinding (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017127772.2A DE102017127772A1 (de) | 2017-11-24 | 2017-11-24 | Mahlvorrichtung |
PCT/EP2018/077681 WO2019101424A1 (de) | 2017-11-24 | 2018-10-11 | Mahlvorrichtung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3714098A1 EP3714098A1 (de) | 2020-09-30 |
EP3714098B1 true EP3714098B1 (de) | 2021-11-17 |
Family
ID=63915243
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18789573.5A Active EP3714098B1 (de) | 2017-11-24 | 2018-10-11 | Mahlvorrichtung |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3714098B1 (zh) |
CN (1) | CN111373091B (zh) |
DE (1) | DE102017127772A1 (zh) |
WO (1) | WO2019101424A1 (zh) |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1066226A (en) * | 1963-07-01 | 1967-04-26 | Defibrator Ab | Grinding apparatus primarily for ligno-cellulose containing material |
DE1246370B (de) * | 1964-04-11 | 1967-08-03 | Voith Gmbh J M | Muehle, insbesondere zum Aufbereiten von Faserstoffen |
FI51512C (fi) * | 1975-09-09 | 1977-01-10 | Yhtyneet Paperitehtaat Oy | Menetelmä ja laite hierrejauhimen jauhinkiekkojen säätämiseksi yhdensu untaisiksi. |
DE3743777A1 (de) * | 1987-12-23 | 1989-07-06 | Felder Industrietechnik Gmbh | Scheibenrefiner |
US4986480A (en) * | 1989-06-29 | 1991-01-22 | Kamyr Ab | Method and apparatus for feeding a conical refiner |
JP4245272B2 (ja) * | 1997-10-09 | 2009-03-25 | サーモ・ブラック・クローソン・インコーポレーテッド | 製紙用パルプ精製機制御装置および方法 |
GB2331469A (en) * | 1997-11-25 | 1999-05-26 | Univ Bradford | Pulp refiner |
US6053440A (en) * | 1999-03-02 | 2000-04-25 | Beloit Technologies, Inc. | Tangential discharge disk refiner |
US6752165B2 (en) * | 2000-03-08 | 2004-06-22 | J & L Fiber Services, Inc. | Refiner control method and system |
AU2001242150A1 (en) * | 2000-03-15 | 2001-09-24 | Pulp And Paper Research Institute Of Canada | Refiner force sensor |
SE521848C2 (sv) * | 2002-04-02 | 2003-12-09 | Metso Paper Inc | Förfarande och anordning för mätning av kraftpåkänningar hos raffinörer |
DE202006002999U1 (de) * | 2006-02-24 | 2007-06-28 | Voith Paper Patent Gmbh | Scheibenrefiner zum Mahlen von Faserstoffmaterial |
-
2017
- 2017-11-24 DE DE102017127772.2A patent/DE102017127772A1/de not_active Ceased
-
2018
- 2018-10-11 EP EP18789573.5A patent/EP3714098B1/de active Active
- 2018-10-11 WO PCT/EP2018/077681 patent/WO2019101424A1/de unknown
- 2018-10-11 CN CN201880075740.8A patent/CN111373091B/zh active Active
Also Published As
Publication number | Publication date |
---|---|
CN111373091B (zh) | 2022-07-15 |
EP3714098A1 (de) | 2020-09-30 |
DE102017127772A1 (de) | 2019-05-29 |
WO2019101424A1 (de) | 2019-05-31 |
CN111373091A (zh) | 2020-07-03 |
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