EP3398682B1 - Garniture pour rafineur de matières fibreuses - Google Patents

Garniture pour rafineur de matières fibreuses Download PDF

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Publication number
EP3398682B1
EP3398682B1 EP18173097.9A EP18173097A EP3398682B1 EP 3398682 B1 EP3398682 B1 EP 3398682B1 EP 18173097 A EP18173097 A EP 18173097A EP 3398682 B1 EP3398682 B1 EP 3398682B1
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EP
European Patent Office
Prior art keywords
treatment elements
treatment
webs
fitting according
rotation
Prior art date
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Active
Application number
EP18173097.9A
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German (de)
English (en)
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EP3398682A1 (fr
Inventor
Martin Schmid
Jutta HECHT
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Voith Patent GmbH
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Voith Patent GmbH
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    • 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
    • D21D1/30—Disc mills
    • 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
    • B02C7/02—Crushing or disintegrating by disc mills with coaxial discs
    • B02C7/06—Crushing or disintegrating by disc mills with coaxial discs with horizontal axis
    • 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

Definitions

  • the invention encompasses a clothing for treating aqueous suspended pulp in a treatment gap bounded by two treatment surfaces rotating relative to each other about a rotation axis and formed by sets, consisting of a base body with treatment elements pointing radially to the gap, elongated and at least one directional component the method according to the invention.
  • Such sets are to be suitable for the mechanical treatment of suspended pulp material.
  • Trimmings are z. B. in grinding machines - so-called refiner - installed.
  • the suspension in refiners has a solids content of about 2-8%. Similar densities are also driven in Entstippern. For machines for higher densities one speaks z.
  • dispersers or kneaders The mechanical processing taking place therein can detect the entire fibrous material, thus also dispersing the impurities contained therein.
  • Such machines have at least one rotor and at least one stator with either disc-shaped or conical surfaces on which the trimmings are mounted, so that gaps can form between them.
  • Many trimmings have webs and grooves on the work surfaces, which is why we also speak of "knife trimmings".
  • Other trimmings are in the form of toothed rings.
  • the trimmings are subject to wear and therefore must be in certain Intervals are replaced. In addition, wear can cause the machining effect to change during the service life.
  • the object of the invention is to increase the freedom of design in such sets with economically justifiable effort.
  • this object is achieved in that the treatment elements are at least partially applied in layers of a liquid or solid material and thereby subjected to a physical or chemical curing or melting process. Due to the layered application, the material and shape of the
  • treatment elements easier and more comprehensive adapted to the specific requirements. It is advantageous if in each case one core of the treatment elements is integrally connected to the main body and at least one outer region, Preferably, the treatment gap facing the outer part of the treatment elements applied in layers of a liquid or solid material and thereby subjected to a physical or chemical curing or melting process.
  • the treatment elements can be provided with a wear layer. If the color of the core differs from that of the outer part of the treatment elements, it can be concluded that the wear limit has been reached via the color change. Also, the reprocessing of worn sets is possible on the application of the wear layer.
  • the core of the treatment elements not only acts as a connecting element to the body but also reduces the amount of required and usually expensive, wear-resistant material.
  • the treatment elements are applied as a whole in layers of a liquid or solid material and subjected to a physical or chemical hardening or melting process. This also allows the use of universally applicable bodies.
  • the layered material is usually expensive, a cheaper, different material can be used for the base body.
  • the layered material should be applied be powdered and / or comprise one or more metals or metal compounds. It is advantageous if the layered material is sintered or fused by means of laser.
  • the surface roughness of the treatment element can be influenced by the grain size of the powder.
  • the production method according to the invention makes it possible to select materials according to the specific requirements, which is why at least part of the surface of the treatment elements, each of two side surfaces and the intermediate upper side facing the gap, should consist of a material which differs from the material of the Body differentiates.
  • the treatment elements can be made very wear resistant with minimal use of expensive materials such as tungsten carbide.
  • At least the majority of, preferably all treatment elements should in particular consist entirely of a material which differs from the material of the base body.
  • this profile of the top of the treatment elements is formed by recesses which are delimited by webs extending therebetween and also at the edge of the top by webs forming part of the side surface of the treatment elements. Because of the high stress on this profile during the rotation of the treatment surfaces or the treatment of the pulp suspension should at least along a side surface of the treatment elements, which preferably at a rotating treatment surface in the direction of rotation and a fixed treatment surface opposite to the direction of rotation (the other, rotating treatment surface), the webs have a greater width than the webs extending between the recesses. A comprehensive protection of the profile regardless of the direction of rotation can be ensured by having along both side surfaces of the treatment elements, the webs, which form part of the side surfaces, a greater width than the extending between the recesses webs.
  • the profile of the treatment elements is removed as a result of wear, material is increasingly being loosened or washed out of the recesses so that a certain tread depth remains ensured over a long service life.
  • the dissolved material is not critical to the pulp processing process because of the small amount of material relative to the amount of pulp being treated.
  • the course of the webs changes at least partially perpendicular to the top of the treatment elements.
  • recesses can be realized under the top of the treatment elements, which only with increasing wear for Open top. This can effectively counteract a permanent closure of the recesses on fiber or fines and increase the stability of the treatment elements.
  • treating machines for pulp processing have circular or annular treatment surfaces, which are composed of several sets.
  • advantages of the manufacturing method according to the invention in terms of manufacturability and cost-effectiveness, in particular, when the main body, the shape of a circular segment or a
  • Circular segment has and the product of segment angle (in °) and the circle diameter (in cm) is greater than 6000, preferably greater than 6500.
  • the manufacturing process according to the invention allows larger sets and thus reduces their number per treatment area, which improves the homogeneity of the treatment.
  • the circle diameter of the body should be between 35 and 150 cm.
  • the thickness of the body In contrast to the usual casting of the trimmings, it is possible by the inventive method, the thickness of the body and thus reduce their material requirements and weight. It has proven to be particularly advantageous that the thickness of the base body is less than the height of the treatment elements and in particular less than 85%, preferably less than 75% of the height of the treatment elements. When considering the thickness of the body remain localized thickening, for example, for attachment in the housing o. unconsidered.
  • the emanating from the body height of the treatment elements can be reduced with the same operating time, which in turn simplifies their stratified order.
  • there is a reduced idle power of the machine, with a small amount of treatment elements is beneficial.
  • the height of the treatment elements should be at least partially, preferably entirely below 5 mm, preferably below 4 mm.
  • the production method according to the invention in contrast to conventional casting, allows very narrow treatment elements and equally small distances between adjacent treatment elements. For this reason, the treatment elements should be parallel
  • an elongated cross-sectional shape and at least partially, preferably entirely have a width between 0.1 and 5 mm, in particular between 0.1 and 1 mm and / or the distance between adjacent treatment elements at least partially, preferably entirely between 0.1 and 5 mm, in particular between 0.1 and 2 mm.
  • the radius at the transition between the base body and treatment element is less than 1 mm, preferably less than 0.3 mm and the treatment elements can be implemented without Ausformschräge. This leads to a larger open groove surface, a better conveying effect of the trimmings and an optimal use of the treatment surface.
  • the inventive method now also allows undercuts in the treatment elements.
  • the side surface of the treatment elements facing in the direction of rotation should be inclined with respect to a perpendicular to the direction of rotation counter to the direction of rotation.
  • the elongate treatment elements are at least partially odd. ie are curved or have a kink.
  • a grinding gap 4 formed by a fixed and coupled to the housing grinding surface and a rotating about a rotation axis 15 grinding surface.
  • the two annular grinding surfaces treatment surfaces parallel to each other, wherein the distance between these is usually adjustable.
  • the rotating grinding surface is here moved by a rotatably mounted in the housing shaft 16 in the direction of rotation.
  • This shaft 16 is driven by a drive also present in the housing.
  • the fiber suspension 1 to be ground passes via an inlet through the center into the grinding gap 4 between the two grinding surfaces.
  • a supply via openings in the clothing is possible.
  • the fiber suspension 1 passes the cooperating grinding surfaces radially outwards and leaves the adjoining annular space through a drain. Not shown are the means known per se, with which a force is generated to press the two grinding surfaces against each other.
  • Both grinding surfaces are each of a plurality of circular segment or annular segment-shaped grinding sets 2.3 according to FIG. 2 formed, which extend over in each case a peripheral segment of the corresponding grinding surface.
  • the sets are 2.3, as in FIG. 2 shown in each case by a base plate 5 with a plurality of substantially radially extending, strip-shaped treatment elements 6 and grooves 9 formed therebetween.
  • the cross section of the treatment elements 6, also called knife, is, as in the FIGS. 3, 4 and 6 represented, generally rectangular, but there are other forms. So can according to Figure 5a-c Also, one or both of the approximately perpendicular to the direction of rotation 17 of the grinding surface extending side surfaces 18 of the treatment elements 6 in or against the direction of rotation 17 may be inclined. A conveying effect in the grinding gap 4 and thus also an intensification of the fiber treatment is achieved if, as in Figure 5a-c shown, in a rotating grinding surface facing in the direction of rotation 17 side surface 18 of the treatment elements 6 is inclined with respect to a perpendicular to the rotation direction 17 opposite to the direction of rotation 17. Corresponding FIG. 5c Both sides of the treatment elements 6 are inclined in the same direction.
  • the opposite to the direction of rotation 17 facing side surface 18 may be inclined against the Roatationscardi 17 or as at FIG. 5b perpendicular to Roatationsrichung 17 run.
  • the variation of the inclinations of the side surfaces 18 is not limited to this, but can be done depending on the desired effect, for example, even with fixed grinding surfaces.
  • the treatment elements 6 Parallel to the base 5, the treatment elements 6 have an elongated cross-sectional shape, wherein the treatment gap 4 facing upper side 19 of the treatment elements 6 is generally parallel to the outer surface of the base body 5.
  • the treatment elements 6 often run at least over a radial section odd, ie curved, wavy or as in FIG. 2 to see it kinked. This is now possible in connection with the subsequent manufacturing process even with inclined side surfaces 18.
  • the treatment elements 6 of the trimmings are at least partially applied in layers of a liquid or solid material and subjected to a physical or chemical curing or melting process.
  • the materials can be chosen according to the specific demands and requirements.
  • the main body 5 can be cast from a cheap metal and have the same shape for differently shaped sets 2.3. Even a reuse of the main body 5 is possible. Since the base body 5 is not exposed to increased wear in operation, there are no special requirements for its wear resistance.
  • the treatment elements 6 are subject to increased wear, which is why at least part of each of two side surfaces 18 and the intermediate, directed to the gap 4 top 19 surface of the treatment elements 6 consists of a wear-resistant material, which differs from the material of the base body 5.
  • the arrangement of the treatment elements 6 on the base body 5 can be selected as needed.
  • treatment elements 6 consist entirely of a material which differs from the material of the main body 5. Therefore, the treatment elements 6 can be applied as a whole layer by layer from a liquid or solid material and thereby undergo a physical or chemical curing or melting process.
  • the treatment elements 6 at FIGS. 4 and 6 each one integral with the main body 5 connected core 7.
  • the arrangement of the treatment elements 6 is given, but on the other hand ensures a very strong fixation on the body 5 via the cores 7. Accordingly, only an outer region of the treatment elements 6 is applied in layers of a liquid or solid material and thereby subjected to a physical or chemical curing or melting process.
  • tungsten carbide is suitable as the outer wear layer for the layered structure, whereby a thickness of this wear layer of 1 mm is usually sufficient.
  • the layered material often differs in color from the material of the base body 5, a complete abrasion of the material applied in layers on the upper side 19 of the treatment elements 6 facing the gap 4 can easily be detected.
  • At least the top 4 of the treatment elements 6 facing the gap 4 can be made profiled.
  • This profile essentially comprises recesses 20 on the upper side 19 which are delimited by webs 21 running between the recesses 20 and also by webs 22 forming part of the side surface 18 of the treatment elements 6 at the edge of the upper side 19.
  • FIGS. 7 and 9 be the recesses 20 of the gap 4 open towards slots and at FIG. 8 formed by open honeycombs. Since the profile is exposed to a large stress, the webs 22 at FIG.
  • the reinforced webs 21 are located at a rotating grinding surface in the direction of rotation 17 and a fixed grinding surface in the opposite direction of rotation 17 (the opposite, rotating grinding surface) facing side.
  • the outer region of the treatment elements 6 situated below the profile is completely filled with the corresponding material over a thickness of at least 4 mm, the density of this material being higher in the sections with overlying webs 21, 22 than in Sections with overlying recesses 20 is. While this density difference is at FIG. 3b exemplarily extends over a substantial part of the treatment element 6, this is at FIG. 6a down to the core 7 to find.
  • FIG. 9 shows an embodiment in which the course of the webs 21,22, perpendicular to the top 19 of the treatment elements 6, changes.
  • the treatment elements 6 here consist of several layers arranged one above the other towards the grinding gap 4, whereby the webs 21 of a layer extend essentially over the slot-shaped recesses 20 of the layer lying below , In this way, the effect of the profile over a long period of operation can be maintained.
  • the thickness 11 of the main body 5 can now be less than the height 10 of the treatment elements 6, which has a positive effect on the weight and the handling of the set 2.3.
  • This in turn also makes it possible to select the segment angle 8 of the set 2,3 greater than usual, so that the product of segment angle 8 (in °) and the circle diameter (in cm) is greater than 6000, preferably greater than 6500.
  • the circle diameter of the base body 5 is between 35 and 150 cm.
  • the height 10 of the treatment elements 6 is here, for example, less than 5 mm, the width 12 of the treatment elements 6 between 0.1 and 1 mm and the distance 13 between adjacent treatment elements 6 between 0.1 and 2 mm.
  • the new manufacturing process also allows at the transition between the base body 5 and treatment element 6 smaller radii 14 of less than 0.3 mm, which is positive for the conveying effect.

Claims (14)

  1. Garniture (2, 3) destinée au traitement d'une matière fibreuse (1) en suspension aqueuse dans un interstice de traitement (4) délimité par deux surfaces de traitement en rotation l'une par rapport à l'autre et formées par des garnitures (2, 3), composée d'un corps de base (5) muni d'éléments de traitement (6) orientés vers l'interstice (4), allongés et s'étendant dans le sens radial par au moins une composante de direction, les éléments de traitement (6) étant au moins partiellement appliqués couche par couche à partir d'un matériau liquide ou solide et étant alors soumis à un processus de durcissement ou de fusion physique ou chimique, au moins une partie, de préférence la totalité de la surface des éléments de traitement (6), respectivement formée par deux faces latérales (18) et le côté supérieur (19) entre se trouvant, elles et orienté vers l'interstice (4) se composant d'un matériau qui est différent du matériau du corps de base (5), caractérisée en ce qu'au moins le côté supérieur (19) orienté vers l'interstice (4) des éléments de traitement (6) présente un profil qui est formé par des cavités (20), lesquelles sont délimitées par des nervures (21) qui s'étendent entre elles et au bord également par des nervures (22) qui forment une partie de la face latérale (18) des éléments de traitement (6) et la zone extérieure des éléments de traitement (6), qui se trouve au-dessous du profil, est entièrement remplie du matériau correspondant sur une épaisseur d'au moins 2 mm, la densité de ce matériau dans les portions au-dessus desquelles se trouvent les nervures (21, 22) étant supérieure à celle dans les portions au-dessus desquelles se trouvent les cavités (20).
  2. Garniture selon la revendication 1, caractérisée en ce qu'au moins la pluralité, de préférence la totalité des éléments de traitement (6), se composent notamment entièrement d'un matériau qui est différent du matériau du corps de base (5).
  3. Garniture selon la revendication 1 ou 2, caractérisée en ce qu'au moins le long d'une face latérale (18) des éléments de traitement (6), laquelle est de préférence orientée dans le sens de rotation (17) avec une surface de traitement en rotation et à l'inverse du sens de rotation (17) avec une surface de traitement immobile, les nervures (22) ont une largeur supérieure à celle des nervures (21) qui s'étendent entre les cavités (20) .
  4. Garniture selon l'une des revendications précédentes, caractérisée en ce que le long des deux faces latérales (18) des éléments de traitement (6), les nervures (22) ont une largeur supérieure à celle des nervures (21) qui s'étendent entre les cavités (20).
  5. Garniture selon l'une des revendications précédentes, caractérisée en ce que la zone extérieure des éléments de traitement (6) qui se trouve sous le profil est entièrement remplie du matériau correspondant sur une épaisseur d'au moins 4 mm, la densité de ce matériau dans les portions au-dessus desquelles se trouvent les nervures (21, 22) étant supérieure à celle dans les portions au-dessus desquelles se trouvent les cavités (20).
  6. Garniture selon l'une des revendications précédentes, caractérisée en ce que le tracé des nervures (21, 22) varie au moins partiellement perpendiculairement au côté supérieur (19) des éléments de traitement (6).
  7. Garniture selon l'une des revendications précédentes, caractérisée en ce que le corps de base (5) présente la forme d'un segment de cercle ou d'un segment de tore, et le produit de l'angle de segment (8) (en °) par le diamètre du cercle (en cm) est supérieur à 6000, de préférence supérieur à 6500.
  8. Garniture selon l'une des revendications précédentes, caractérisée en ce que l'épaisseur (11) du corps de base (5) est inférieure à la hauteur (10) des éléments de traitement (6).
  9. Garniture selon l'une des revendications précédentes, caractérisée en ce que la hauteur (10) des éléments de traitement (6) est au moins partiellement, de préférence entièrement inférieure à 5 mm, de préférence inférieure à 4 mm.
  10. Garniture selon l'une des revendications précédentes, caractérisée en ce que les éléments de traitement (6) allongés possèdent au moins partiellement, de préférence entièrement une largeur (12) entre 0,1 et 5 mm, notamment entre 0,1 et 1 mm.
  11. Garniture selon l'une des revendications précédentes, caractérisée en ce que le rayon (14) au niveau de la transition entre le corps de base (5) et l'élément de traitement (6) est inférieur à 1 mm, de préférence inférieur à 0,3 mm.
  12. Garniture selon l'une des revendications précédentes, caractérisée en ce qu'au moins une face latérale (18) des éléments de traitement (6) est inclinée par rapport à une perpendiculaire au sens de rotation (17) d'une surface de traitement.
  13. Garniture selon la revendication 12, caractérisée en ce que lorsque la surface de traitement est en rotation, la face latérale (18) des éléments de traitement (6) qui est orientée dans le sens de rotation (17) est inclinée par rapport à une perpendiculaire au sens de rotation (17) à l'inverse du sens de rotation (17) .
  14. Garniture selon l'une des revendications précédentes, caractérisée en ce que les éléments de traitement (6) allongés suivent un tracé non rectiligne au moins dans certaines portions.
EP18173097.9A 2015-04-24 2016-02-22 Garniture pour rafineur de matières fibreuses Active EP3398682B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102015207536.2A DE102015207536A1 (de) 2015-04-24 2015-04-24 Behandlungsgarnitur
PCT/EP2016/053640 WO2016169672A1 (fr) 2015-04-24 2016-02-22 Monture de traitement pour le traitement d'une matière fibreuse en suspension aqueuse
EP16707006.9A EP3285931A1 (fr) 2015-04-24 2016-02-22 Monture de traitement pour le traitement d'une matière fibreuse en suspension aqueuse

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP16707006.9A Division EP3285931A1 (fr) 2015-04-24 2016-02-22 Monture de traitement pour le traitement d'une matière fibreuse en suspension aqueuse

Publications (2)

Publication Number Publication Date
EP3398682A1 EP3398682A1 (fr) 2018-11-07
EP3398682B1 true EP3398682B1 (fr) 2019-11-27

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Family Applications (4)

Application Number Title Priority Date Filing Date
EP18173135.7A Active EP3398684B1 (fr) 2015-04-24 2016-02-22 Garniture pour rafineur de matières fibreuses
EP16707006.9A Withdrawn EP3285931A1 (fr) 2015-04-24 2016-02-22 Monture de traitement pour le traitement d'une matière fibreuse en suspension aqueuse
EP18173097.9A Active EP3398682B1 (fr) 2015-04-24 2016-02-22 Garniture pour rafineur de matières fibreuses
EP18173124.1A Active EP3398683B1 (fr) 2015-04-24 2016-02-22 Garniture pour rafineur de matières fibreuses

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Application Number Title Priority Date Filing Date
EP18173135.7A Active EP3398684B1 (fr) 2015-04-24 2016-02-22 Garniture pour rafineur de matières fibreuses
EP16707006.9A Withdrawn EP3285931A1 (fr) 2015-04-24 2016-02-22 Monture de traitement pour le traitement d'une matière fibreuse en suspension aqueuse

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EP18173124.1A Active EP3398683B1 (fr) 2015-04-24 2016-02-22 Garniture pour rafineur de matières fibreuses

Country Status (7)

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EP (4) EP3398684B1 (fr)
KR (1) KR20170139156A (fr)
CN (4) CN107530707B (fr)
BR (1) BR112017022574B1 (fr)
CA (1) CA2983614C (fr)
DE (1) DE102015207536A1 (fr)
WO (1) WO2016169672A1 (fr)

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DE202017100135U1 (de) 2017-01-12 2018-04-15 Valmet Ab Refinerscheibensegment
DE102019104105B3 (de) * 2019-02-19 2020-06-18 Voith Patent Gmbh Mahlgarnitursegment
DE102020124895A1 (de) * 2020-09-24 2022-03-24 Voith Patent Gmbh Mahlgarnitursegment
WO2022063643A1 (fr) 2020-09-24 2022-03-31 Voith Patent Gmbh Segment de garniture de raffinage

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Publication number Publication date
CN109317254B (zh) 2021-07-30
WO2016169672A1 (fr) 2016-10-27
CN109317255B (zh) 2020-11-13
EP3285931A1 (fr) 2018-02-28
DE102015207536A1 (de) 2016-10-27
CN109317253B (zh) 2021-08-13
EP3398684B1 (fr) 2019-11-27
CN107530707A (zh) 2018-01-02
EP3398682A1 (fr) 2018-11-07
CA2983614A1 (fr) 2016-10-27
CA2983614C (fr) 2020-03-10
EP3398683B1 (fr) 2019-12-04
CN109317254A (zh) 2019-02-12
BR112017022574B1 (pt) 2021-07-27
CN107530707B (zh) 2020-05-15
BR112017022574A2 (pt) 2018-07-17
EP3398684A1 (fr) 2018-11-07
EP3398683A1 (fr) 2018-11-07
CN109317255A (zh) 2019-02-12
KR20170139156A (ko) 2017-12-18
CN109317253A (zh) 2019-02-12

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