EP3714098A1 - Mahlvorrichtung - Google Patents
MahlvorrichtungInfo
- Publication number
- EP3714098A1 EP3714098A1 EP18789573.5A EP18789573A EP3714098A1 EP 3714098 A1 EP3714098 A1 EP 3714098A1 EP 18789573 A EP18789573 A EP 18789573A EP 3714098 A1 EP3714098 A1 EP 3714098A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shaft
- base plate
- rotating
- axial
- rotating base
- 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.)
- Granted
Links
- 238000006073 displacement reaction Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 4
- 230000001965 increasing effect Effects 0.000 claims description 3
- 239000002657 fibrous material Substances 0.000 abstract description 3
- 239000000835 fiber Substances 0.000 description 10
- 239000000725 suspension Substances 0.000 description 5
- 238000007670 refining Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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 arranged in a housing and radially flowed through by the pulp grinding gaps, each formed by a rotating about a rotation axis treatment tool and a non-rotating treatment tool, wherein the treatment tools each mounted on a base plate are, have a rotationally symmetrical shape and are arranged coaxially to each other, the two rotating treatment tools on a common, driven by a rotatably mounted shaft base plate and are arranged between the two non-rotating treatment tools, the rotating base plate is axially slidably mounted on the shaft and the width of the grinding gaps is variable via an axial displacement of at least one non-rotating base plate.
- the invention also relates to a method for operating this device.
- pulp fibers i. To mill fresh pulp and / or waste paper fibers in order to achieve the desired properties, in particular in terms of strength, formation and surface in the fibrous web produced therefrom.
- the grinding strips are called knives and the grinding surfaces are formed by grinding sets.
- the refiner can be designed as a disc refiner or cone refiner.
- the grinding sets must be optimally adapted to the pulp to be treated, also to prevent excessive wear of the sets.
- the refiner are often preceded by insensitive Dickstoffrefiner or sorter, which is relatively expensive. Due to the relatively high consistency that the pulp has in the treatment, an intensive mechanical processing in such devices is possible, although the relatively movable treatment tools do not touch, but rather pass each other at a small distance. There are quite considerable forces.
- the optimal use of the available treatment area is aimed at increasing the efficiency of the fiber treatment.
- the object of the invention is therefore to reduce the wear and the susceptibility of Mahlan extracten with the least possible effort.
- the object has been achieved in that the shaft is associated with a measuring unit for detecting the axial force acting on the shaft.
- the bearing of the shaft as well as the axial displaceability of the shaft against a force element can be very advantageously connected to 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 arranged on the shaft thrust bearing, which is pressed by a, supported on the housing force element against pointing in the direction of the axial force to be measured stop of the shaft, wherein a sensor detects the relative axial position of the thrust bearing to the housing.
- non-rotating base plates can be done simply and safely by means of screw jack.
- the construction is simplified, however, if a non-rotating base plate by means of Spindelhubelement axially adjustable and the other non-rotating base plate is fixed to the housing.
- the structure is simplified in the case in which the shaft is guided into a transmission coupled to a drive.
- treatment tool and base plate can also be made in one piece.
- Width of the grinding gap can be increased by a corresponding axial displacement of the non-rotating base plate. Regardless, with the steady increase in axial force during the
- the operating parameters of the device can then be adjusted accordingly and the repair planned.
- changes in the axial force during operation also provide useful information on the state of wear of the treatment tools.
- Figure 1 a schematic cross section through a refiner
- Figure 2 the measuring unit 10 for determining the axial force F.
- Rotary axis 8 rotating treatment tool 5 are formed.
- Both treatment tools 4, 5 of a grinding gap 2, 3 are each formed by a plurality of grinding plates which extend over in each case one circumferential segment of the corresponding grinding surface.
- the refining plates result in a continuous grinding surface of the treatment tool 4, 5.
- the fiber suspension to be grounded passes via an inlet 18 through the center into one of the two grinding gaps 2, 3.
- the fiber suspension passes the cooperating grinding surfaces of the grinding gaps 2,3 radially outward and collects in the adjoining annular space 19th
- the cross-section of the Mahlleisten also called knife, is generally rectangular, but there are other forms.
- the grooves running between the grinding bars likewise have a rectangular cross-section and serve as flow channels for the fiber suspension.
- the groove depth is usually between 2 and 20 mm.
- a non-rotating base plate 6 is axially displaceable by means of a spindle lifting element 16 and the other non-rotating base plate 6 is connected to the housing 1.
- the rotating base plate 7 can adjust the pressure between the two grinding gaps 2, 3 when the overall width of both grinding gaps 2, 3 is adjusted no longer compensate.
- the shaft 9 is 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 axial force F measuring unit 10 comprises an axial bearing 11 arranged on the shaft 9, which is fixed radially in a bearing housing 15 coupled to the housing 1.
- the thrust bearing 11 is pressed by the, on the bearing housing 15 supporting force element 12 against a facing in the direction of the measured axial force 7 stop 13 of the shaft 9, wherein a sensor 14, the relative axial position of the thrust bearing 11 to the bearing housing 15 and thus also detected to the housing 1 of the refiner.
- inductive sensors, load cells or the like can be used as sensor 14 in this demanding environment. be used. Since the force element 12 and the axial force F act opposite and thus adjusts a balance, it can be concluded on the axial force F on the axial position of the thrust bearing 11 and the parameters of the force element 12.
- the axial displacement of the non-rotating base plate 6 can be stopped when exceeding a predetermined axial force F of the shaft 9 or at a very high axial force F, the total width of the grinding gaps 2,3 by a corresponding axial displacement of the non-rotating base plate. 6 be enlarged.
- the width of the treatment gap 6 is adjusted so as to give a corresponding to the pulp to be treated and the desired parameters of the pulp after treatment corresponding optimal axial force F.
Landscapes
- Crushing And Grinding (AREA)
- Paper (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Abstract
Description
Claims
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 true EP3714098A1 (de) | 2020-09-30 |
EP3714098B1 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 (de) |
CN (1) | CN111373091B (de) |
DE (1) | DE102017127772A1 (de) |
WO (1) | WO2019101424A1 (de) |
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 |
EP1021248B1 (de) * | 1997-10-09 | 2005-12-28 | Kadant Black Clawson Inc. | Vorrichtung und verfahren zur steuerung eines raffineurs für papierbreie |
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 |
JP2003527588A (ja) * | 2000-03-15 | 2003-09-16 | パルプ アンド ペーパー リサーチ インスチチュート オブ カナダ | リファイナ力センサ |
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 WO PCT/EP2018/077681 patent/WO2019101424A1/de unknown
- 2018-10-11 CN CN201880075740.8A patent/CN111373091B/zh active Active
- 2018-10-11 EP EP18789573.5A patent/EP3714098B1/de active Active
Also Published As
Publication number | Publication date |
---|---|
CN111373091A (zh) | 2020-07-03 |
EP3714098B1 (de) | 2021-11-17 |
WO2019101424A1 (de) | 2019-05-31 |
CN111373091B (zh) | 2022-07-15 |
DE102017127772A1 (de) | 2019-05-29 |
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