EP3927883A1 - Mahlgarnitursegment - Google Patents
MahlgarnitursegmentInfo
- Publication number
- EP3927883A1 EP3927883A1 EP19832052.5A EP19832052A EP3927883A1 EP 3927883 A1 EP3927883 A1 EP 3927883A1 EP 19832052 A EP19832052 A EP 19832052A EP 3927883 A1 EP3927883 A1 EP 3927883A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- channels
- treatment elements
- treatment
- segment
- grinding
- 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
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
- D21D1/306—Discs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C7/00—Crushing or disintegrating by disc mills
- B02C7/11—Details
- B02C7/12—Shape or construction of discs
-
- 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
- D21D1/22—Jordans
-
- 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
Definitions
- the invention relates to a clothing segment for grinding aqueous suspended fibrous material in a grinding gap delimited by two treatment surfaces that rotate relative to one another and formed by clothing segments, consisting of a base body with elongated treatment elements pointing towards the grinding gap and at least one directional component radially running treatment elements and grooves running between them.
- the invention also includes a treatment surface consisting of several clothing segments according to the invention arranged next to one another and a method for producing a clothing segment according to the invention for grinding aqueous suspended fiber in a grinding gap, consisting of a base body with treatment elements facing the grinding gap.
- Such sets have been known for a long time and are installed in grinding machines - so-called refiners.
- the suspension in refiners has a solids content of around 2-8%.
- Such machines generally have at least one rotor and at least one stator with either disc-shaped or conical-shaped treatment surfaces on which the clothing is attached so that grinding gaps can be formed between them.
- the sets have ridges and grooves on the treatment surfaces, which is why they are also referred to as "knife sets”.
- the sets are subject to high wear and tear and must therefore be replaced at certain intervals. Wear can also lead to a change in the machining effect during the service life.
- a significant part of the operating costs associated with the mechanical treatment of pulps in the pulp and paper industry comes from energy costs. Therefore it has always been an endeavor, trimmings and the to build and operate the machines used in such a way that - measured against the desired success - an excessive amount of energy is required.
- the object of the invention is to extend the service life of such clothing segments with the most efficient possible grinding.
- the object was achieved in that a plurality of at least one directional component radially and at least approximately parallel to the grinding gap and each having different distances to the grinding gap are arranged in the base body, which at least partially overlap one another or with the groove base viewed in the direction of rotation.
- the width of the channels should essentially correspond to the width of the grooves and / or the width of the wall between adjacent channels in the direction of rotation should essentially correspond to the width of the treatment elements.
- the channels should each run at least approximately parallel to at least one elongated treatment element located axially approximately above it.
- a slight inclination of the channels towards the grinding gap can also be advantageous. If the channels are inclined radially outward towards the grinding gap, the channels open radially outward first when worn. In this way it is ensured that a sufficiently large open groove area and the required cutting edge length of the treatment elements are also present with increasing wear.
- the design and / or arrangement of the channels of the treatment area, the clothing segment or a zone thereof is chosen so that the open area of the grooves and / or the length of the cut edge remains approximately the same over the entire service life, so that the idle power over the entire service life remains about the same.
- the groove base of adjacent grooves is of different depths.
- the adjacent grooves are advantageously of different depths not only in the initial state but also during wear.
- the channels of adjacent planes should run offset to one another in the direction of rotation in such a way that, viewed in the direction of rotation, they partially overlap. Regardless of this, in the interests of homogeneous grinding, the grooves should at least predominantly have a constant width and / or the width of the treatment elements should be at least predominantly the same size.
- the width of the treatment elements is between 0.1 and 1.5 mm and / or the height of the treatment elements is less than 5 mm.
- the elongate treatment elements and the channels advantageously run at least in sections in an uneven manner.
- the mostly circular or circular ring-shaped treatment surfaces are usually composed of several clothing segments.
- the circle diameter of the base body should be between 35 and 150 cm.
- the treatment elements are at least partially, preferably completely and advantageously also the base body at least partially applied in layers from one or more liquid and / or pasty and / or solid materials and are subjected to a physical or chemical hardening or melting process. From this hardening or
- the melting process also includes sintering.
- the material and shape of the treatment elements as well as the channels can be adapted more easily and comprehensively to the special requirements. It must be noted that, depending on the material applied and the special hardening or melting process, shrinkage of up to 30% can occur. Because of the high loads in such machines for grinding fibrous materials, the material applied in layers should be powdery and / or comprise one or more metals or metal compounds.
- the material applied in layers is sintered or fused by means of a laser.
- Ceramic layers can also be produced in this way.
- the surface roughness of the treatment element can be influenced via the grain size of the powder.
- FIG. 1 a schematic cross section through a grinding arrangement
- FIG. 2 a plan view of a set segment 2 of the grinding arrangement
- FIG. 3 a partial cross section through two adjacent clothing segments 2
- FIG. 4 a partial cross section through another clothing segment 2.
- a grinding gap 3 is formed by a stationary grinding surface coupled to the housing and a grinding surface rotating about an axis of rotation 10.
- the two circular grinding surfaces run parallel to one another, the distance between them usually being adjustable.
- conical treatment surfaces are also possible.
- the rotating grinding surface is moved in the direction of rotation by a shaft rotatably mounted in the housing. This shaft is driven by a drive that is also present in the housing, for example.
- the fiber suspension 1 to be milled reaches the milling gap 3 between the two milling surfaces via an inlet through the center. However, it can also be supplied through openings in the grinding surface.
- the fiber suspension 1 passes the interacting grinding surfaces radially outwards and leaves the adjoining annular space through an outlet.
- Both grinding surfaces are each formed by several circular segment or circular ring segment-shaped grinding set segments 2 according to FIG. 2, which each extend over a circumferential segment of the corresponding grinding surface and are lined up next to one another in the circumferential direction.
- the clothing segments 2 are each formed by a base plate 4 with a plurality of essentially radially extending, strip-shaped treatment elements 5 and grooves 6 in between.
- the treatment elements 5 have an elongated cross-sectional shape parallel to the base area 4, the upper side of the treatment elements 5 facing the treatment gap 3 generally running parallel to the outer surface of the base body 4.
- the treatment elements 5 often run unevenly, at least over a radial section, that is to say curved, corrugated or kinked, as can be seen in FIG.
- the base body 4 and the treatment elements 5 of the clothing segments 2 are completely applied in layers from a liquid, pasty or solid material and subjected to a physical or chemical hardening or melting process.
- the application of powdered material in layers which comprises ceramic or one or more metals or metal compounds, is particularly suitable.
- This material applied in layers can then be sintered or fused by laser after each layer or, in a first step, glued with binding agent and later sintered (binder jetting process). In the latter process, the binder evaporates.
- the arrangement of the treatment elements 5 on the base body 4 can be selected as required.
- the circle diameter of the base body 4 is between 35 and 150 cm.
- a plurality of at least one directional component of at least one directional component running radially and parallel to the grinding gap 3 and each having different distances from the grinding gap 3 channels 8 are arranged in the base body 4, which partially overlap one another or with the groove base viewed in the direction of rotation 11.
- this base body 4 is made much easier by applying it in layers.
- the channels 8 should each run at least approximately parallel to an elongated treatment element 5 located axially above it. A slight inclination of the channels 8 towards the grinding gap 3 can in particular be advantageous radially outward for the flow.
- the grooves 6 have at least predominantly a constant width.
- the width of the treatment elements 5 also remains at least predominantly the same in the radial direction.
- the width of the channels 8 essentially corresponds to the width of the grooves 6 and the width of the wall 9 between adjacent channels 8 in the direction of rotation 11 essentially corresponds to the width the treatment elements 5.
- the channels 8 of adjacent planes 7 are arranged offset from one another in the direction of rotation 11. In addition, the channels 8 of adjacent planes 7 partially overlap in the direction of rotation 11, so that when a wall 9 is completely removed, the adjacent, axially underlying channel 8 is opened.
- the fleas of the treatment elements 5 is here, for example, below 3 mm and the width of the treatment elements 5 between 0.1 and 1 mm.
- the width of the treatment elements 5 between 0.1 and 1 mm.
- At least some of the planes 7 of two adjacent clothing segments 2 can be at different distances from the grinding gap 3.
- the cross-sections of the channels 8 of adjacent clothing segments 2 can also differ. While the channels 8 of one clothing segment 2 are circular, the channels 8 of the adjacent clothing segment 2 here have an elliptical cross section, for example.
- the clothing segments 2 themselves to have differently designed zones, the channels 8 of these zones being arranged differently and / or differently designed.
- FIG. 2 shows feed channels 12 which extend radially outward into the grinding surface and, because of the lack of treatment elements 5, support the supply of fiber suspension 1 into the grinding gap 3.
- FIG. 4 shows axially offset channels 8 with a rectangular cross section.
- the aim is to ensure an open groove surface and cutting edge length of the same height in every state of wear.
- adjacent grooves 6 are of different depths in the initial state and during wear.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Paper (AREA)
- Preliminary Treatment Of Fibers (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Crushing And Grinding (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019104105.8A DE102019104105B3 (de) | 2019-02-19 | 2019-02-19 | Mahlgarnitursegment |
| PCT/EP2019/085613 WO2020169236A1 (de) | 2019-02-19 | 2019-12-17 | Mahlgarnitursegment |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP3927883A1 true EP3927883A1 (de) | 2021-12-29 |
| EP3927883B1 EP3927883B1 (de) | 2025-08-06 |
| EP3927883C0 EP3927883C0 (de) | 2025-08-06 |
Family
ID=69105809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19832052.5A Active EP3927883B1 (de) | 2019-02-19 | 2019-12-17 | Mahlgarnitursegment |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US12139854B2 (de) |
| EP (1) | EP3927883B1 (de) |
| KR (1) | KR20210125572A (de) |
| CN (1) | CN113412351B (de) |
| BR (1) | BR112021016209A2 (de) |
| CA (1) | CA3128925C (de) |
| DE (1) | DE102019104105B3 (de) |
| WO (1) | WO2020169236A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021123802A1 (de) | 2020-09-24 | 2022-03-24 | Voith Patent Gmbh | Mahlgarnitursegment |
| DE102020124895A1 (de) | 2020-09-24 | 2022-03-24 | Voith Patent Gmbh | Mahlgarnitursegment |
Family Cites Families (48)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1662572A (en) * | 1928-03-13 | fryer | ||
| US3125306A (en) * | 1964-03-17 | Grinding disk segment for wood chips and the like | ||
| US3104837A (en) * | 1961-01-09 | 1963-09-24 | Bauer Bros Co | Self cleaning refiner plate |
| US4157669A (en) * | 1977-10-12 | 1979-06-12 | Pilao S/A Maquinas E Equipamentos | Method to manufacture comminuting discs for wood pulp refining machines |
| SE413632B (sv) * | 1978-03-03 | 1980-06-16 | Defibrator Ab | Anordning vid malorgan for malapparater for fibrost, foretredesvis vegetabiliskt material |
| BR8402044A (pt) * | 1984-04-27 | 1985-12-03 | Inox Ind E Comercio De Ago Ltd | Aperfeicoamento em discos para refinadoras de polpa para papel e similares |
| US5046672A (en) * | 1990-08-31 | 1991-09-10 | Beloit Corporation | Refiner plate groove configuration |
| FR2667804B1 (fr) * | 1990-10-11 | 1995-02-10 | Technogenia Sa | Plaque a surface antiabrasion, et procede pour sa realisation. |
| US5476228A (en) * | 1994-03-07 | 1995-12-19 | Beloit Technologies, Inc. | Refiner disk with alternating depth grooves |
| US5934585A (en) * | 1997-05-05 | 1999-08-10 | J & L Fiber Services Inc | Refiner plate assembly and method of mounting |
| US5893525A (en) * | 1997-07-01 | 1999-04-13 | Durametal Corporation | Refiner plate with variable pitch |
| US5988538A (en) * | 1998-07-28 | 1999-11-23 | J&L Fiber Services, Inc. | Refiner disc having steam exhaust channel |
| US6607153B1 (en) * | 1998-08-19 | 2003-08-19 | Durametal Corporation | Refiner plate steam management system |
| DE19955009C2 (de) * | 1999-11-16 | 2001-10-18 | Voith Paper Patent Gmbh | Verfahren zur Herstellung von Garnituren für das mechanische Bearbeiten von suspendiertem Faserstoffmaterial |
| US20020070303A1 (en) * | 2000-12-12 | 2002-06-13 | J & L Fiber Services, Inc. | Adjustable refiner plate |
| DE102004016661A1 (de) | 2004-04-05 | 2005-10-20 | Voith Paper Patent Gmbh | Verfahren zur Herstellung von Garnituren für das mechanische Bearbeiten, insb. Mahlen von wasserhaltigenm Papierstoff |
| US7300540B2 (en) * | 2004-07-08 | 2007-11-27 | Andritz Inc. | Energy efficient TMP refining of destructured chips |
| CA2507321C (en) * | 2004-07-08 | 2012-06-26 | Andritz Inc. | High intensity refiner plate with inner fiberizing zone |
| US20090045278A1 (en) * | 2004-10-21 | 2009-02-19 | Ulrich Bech | Crushing element and mills with grinding bodies, mixers, extruders and a pressing worm provided with said crushing elements |
| MXNL05000017A (es) * | 2005-02-22 | 2006-03-23 | Julio Antonio Trevino Morales | Sector de refino y metodo de fabricacion. |
| US20130001334A1 (en) * | 2005-02-28 | 2013-01-03 | Johansson Ola M | Refiners and methods of refining pulp |
| US20070210197A1 (en) * | 2006-03-10 | 2007-09-13 | Carpenter Charles T | Refiner plate |
| WO2008098153A1 (en) * | 2007-02-08 | 2008-08-14 | Andritz Inc. | Mechanical pulping refiner plate having curved refining bars with jagged leading sidewalls and method for designing plates |
| FI124393B (fi) * | 2008-06-19 | 2014-08-15 | Valmet Technologies Inc | Jauhin ja menetelmä kuitumaisen materiaalin jauhamiseksi ja teräsegmentti kuitumaisen materiaalin jauhamiseksi tarkoitettuun jauhimeen |
| FI124677B (fi) * | 2008-06-19 | 2014-11-28 | Valmet Technologies Inc | Jauhin, jauhinpinta, teräsegmentti ja menetelmä kuitumaisen materiaalin jauhamiseksi |
| WO2009155541A2 (en) * | 2008-06-21 | 2009-12-23 | J&L Fiber Services, Inc. | Refiner plate assembly and method with evacuation of refining zone |
| DE102008046592A1 (de) * | 2008-09-10 | 2010-03-11 | Voith Patent Gmbh | Verfahren zur Mahlung von wässrig suspendierten Zellstofffasern sowie Mahlgarnitur zu seiner Durchführung |
| FI121929B (fi) * | 2009-04-03 | 2011-06-15 | Metso Paper Inc | Jauhimen jauhinpinta |
| DE102010029752A1 (de) * | 2010-06-07 | 2011-12-08 | Voith Patent Gmbh | Verfahren zur Mahlung von wässrig suspendierten Zellstofffasern sowie Mahlgarnitur zu seiner Durchführung |
| US9708765B2 (en) * | 2011-07-13 | 2017-07-18 | Andritz Inc. | Rotor refiner plate element for counter-rotating refiner having curved bars and serrated leading edges |
| SE537048C2 (sv) * | 2012-03-05 | 2014-12-16 | Valmet Oy | Apparat för att tillverka fibermassa av lignocellulosahaltigt material |
| US9085850B2 (en) * | 2012-04-13 | 2015-07-21 | Andritz Inc. | Reversible low energy refiner plates |
| US9181654B2 (en) * | 2012-05-30 | 2015-11-10 | Andritz Inc. | Refiner plate having a smooth, wave-like groove and related methods |
| US9968938B2 (en) * | 2012-09-17 | 2018-05-15 | Andritz Inc. | Refiner plate with gradually changing geometry |
| US20140110511A1 (en) * | 2012-10-18 | 2014-04-24 | Andritz Inc. | Refiner plates with short groove segments for refining lignocellulosic material, and methods related thereto |
| US9604221B2 (en) * | 2012-11-09 | 2017-03-28 | Andrtiz Inc. | Stator refiner plate element having curved bars and serrated leading edges |
| US9145641B2 (en) * | 2012-12-13 | 2015-09-29 | Andritz Inc. | Apparatus for disperser plate and method to refine paper |
| FI125739B (fi) * | 2012-12-27 | 2016-01-29 | Valmet Technologies Inc | Teräelementti ja jauhin |
| SE537820C2 (sv) * | 2014-02-10 | 2015-10-27 | Valmet Oy | Raffinör |
| PL3140454T3 (pl) * | 2014-05-07 | 2020-06-01 | University Of Maine System Board Of Trustees | Wysokowydajne wytwarzanie nanofibrylowanej celulozy |
| CA2890381C (en) * | 2014-05-26 | 2017-07-11 | Valmet Technologies, Inc. | Blade segment of disc refiner |
| DE102014009588A1 (de) * | 2014-06-27 | 2016-01-14 | Andritz Fiedler Gmbh | Garnitur für das mechanische Bearbeiten, insbesondere Mahlen von suspendiertem Faserstoffmaterial |
| FI126263B (en) * | 2014-10-29 | 2016-09-15 | Valmet Technologies Inc | Blade element for refiner and refiner for grinding fibrous material |
| US10697117B2 (en) * | 2014-11-19 | 2020-06-30 | Andritz Inc. | Segmented rotor cap assembly |
| DE102015207536A1 (de) * | 2015-04-24 | 2016-10-27 | Voith Patent Gmbh | Behandlungsgarnitur |
| DE202015009542U1 (de) * | 2015-11-23 | 2018-03-12 | Voith Patent Gmbh | Mahlgarnitur |
| SE539716C2 (en) * | 2016-06-15 | 2017-11-07 | Valmet Oy | Refine plate segment with pre-dam |
| DE102022131903A1 (de) * | 2022-12-01 | 2024-06-06 | Bayerische Motoren Werke Aktiengesellschaft | Bedieneinheit zur anordnung an einem lenkrad in einem kraftfahrzeug |
-
2019
- 2019-02-19 DE DE102019104105.8A patent/DE102019104105B3/de active Active
- 2019-12-17 CA CA3128925A patent/CA3128925C/en active Active
- 2019-12-17 CN CN201980091494.XA patent/CN113412351B/zh active Active
- 2019-12-17 BR BR112021016209-7A patent/BR112021016209A2/pt not_active Application Discontinuation
- 2019-12-17 EP EP19832052.5A patent/EP3927883B1/de active Active
- 2019-12-17 KR KR1020217029621A patent/KR20210125572A/ko not_active Abandoned
- 2019-12-17 WO PCT/EP2019/085613 patent/WO2020169236A1/de not_active Ceased
-
2021
- 2021-08-19 US US17/406,428 patent/US12139854B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| KR20210125572A (ko) | 2021-10-18 |
| CA3128925A1 (en) | 2020-08-27 |
| CN113412351A (zh) | 2021-09-17 |
| US12139854B2 (en) | 2024-11-12 |
| CA3128925C (en) | 2023-09-26 |
| EP3927883B1 (de) | 2025-08-06 |
| US20210381164A1 (en) | 2021-12-09 |
| CN113412351B (zh) | 2023-01-20 |
| BR112021016209A2 (pt) | 2021-10-05 |
| WO2020169236A1 (de) | 2020-08-27 |
| DE102019104105B3 (de) | 2020-06-18 |
| EP3927883C0 (de) | 2025-08-06 |
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