EP3256640B1 - Mahlgarnitur - Google Patents

Mahlgarnitur Download PDF

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Publication number
EP3256640B1
EP3256640B1 EP15808576.1A EP15808576A EP3256640B1 EP 3256640 B1 EP3256640 B1 EP 3256640B1 EP 15808576 A EP15808576 A EP 15808576A EP 3256640 B1 EP3256640 B1 EP 3256640B1
Authority
EP
European Patent Office
Prior art keywords
refining
strips
split
assembly according
rotation axis
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
Application number
EP15808576.1A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3256640A1 (de
Inventor
Martin Schmid
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
Original Assignee
Voith Patent GmbH
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Publication date
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP3256640A1 publication Critical patent/EP3256640A1/de
Application granted granted Critical
Publication of EP3256640B1 publication Critical patent/EP3256640B1/de
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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

Definitions

  • the invention relates to a grinding arrangement for grinding of water-suspended pulp fibers between two Mahlspalt forming and relatively rotating grinding surfaces, which are formed by Mahlleisten and intervening grooves, wherein the Mahlleisten extend at least with the essential direction component radially with respect to the axis of rotation.
  • mill pulp fibers ie fresh pulp and / or waste paper fibers
  • the refining surfaces used for this purpose because of the relatively rapid wear of the grinding surfaces, are formed by interchangeable grinding sets bolted to the corresponding support surface.
  • Such a grinding arrangement is for example in the DE 10 2012 214980 A1 described.
  • the grinding sets must be optimally adapted to the pulp to be treated, also to prevent excessive wear of the sets.
  • an optimal use of the available grinding surface is sought. The object of the invention is therefore to improve the efficiency of the fiber treatment.
  • the distance of the radially inner end of all the milling strips from each other at least one grinding surface from the axis of rotation differs by a maximum of 10%, based on the radial maximum length of the grinding bars, and share some of the Mahlleisten radially outward.
  • this allows a full utilization of the grinding surface and on the other hand, the divisions of Mahlleisten generate turbulence in the suspension to be treated, which improves the entry of the fibers into the treatment gap or between the Mahlleisten. Since this design has no restrictions in the direction of flow, the risk of clogging also decreases. Accordingly, the gap width between the grinding bars can be reduced for further increase in efficiency.
  • a comprehensive utilization of the grinding surface results when the radially inner end of all grinding bars at least one grinding surface is equidistant from the axis of rotation.
  • additional turbulence in the suspension can be generated solely by the fact that the radially inner end of all Mahlleisten at least one grinding surface is different distances from the axis of rotation.
  • the turbulence support the collection of the suspension to be treated between the grinding bars. In order to make full use of this, it is advantageous if mill strips alternate in the circumferential direction at a short distance and at a long distance from the axis of rotation.
  • the division takes place at least some Mahlleisten at least one grinding surface with a different distance from the axis of rotation. This can emanating from the divisions of Mahlleisten Inhomogeneities are extended to the largest possible radial region, which counteracts uneven wear. It is particularly advantageous if the distance of the pitch to the axis of rotation increases or decreases continuously in the circumferential direction of the grinding surface.
  • the distance between the dividing grinding strips increases steadily radially outward in a division section following the division.
  • the opening gap between the grinding bars increases the cutting edge length, which has a correspondingly positive effect on the treatment. It has proven to be optimal if the dividing section extends over a length between 10 and 50 mm.
  • the grinding bars should extend as far as possible parallel outside the dividing sections.
  • at least one of the divided milling strips in each case curves according to a division section following the division.
  • the width of the grooves between the Mahlleisten outside the same, following a division division sections is advantageous if some, preferably all Mahlleisten share in two grinding bars. It has proved to produce the already mentioned constant cutting angle advantageous if, after the division of a grinding bar and on the Division following dividing section only one of the two divided Mahlleisten curved and the curved Mahlelf runs after their curvature parallel to the two adjacent Mahlleisten.
  • the distance of the radially inner end of all Mahlleisten both Mahl lake of the rotation axis by a maximum of 10%, based on the radial maximum length of the grinding bars, differ from each other and share some of the grinding bars radially outward.
  • a grinding gap 1 is formed by a fixed grinding surface 2 coupled to the housing and a grinding surface 3 rotating about a rotation axis 6.
  • the two annular grinding surfaces 2,3 parallel to each other, wherein the distance between these is usually adjustable.
  • the rotating grinding surface 3 is here moved by a rotatably mounted in the housing shaft 7 in the direction of rotation.
  • This shaft 7 is driven by a drive also provided in the housing.
  • the fiber suspension S to be ground passes through an inlet through the center into the grinding gap 1 between the two grinding surfaces 2, 3.
  • the fiber suspension S passes through the cooperating grinding surfaces 2,3 radially outward 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 2,3 against each other.
  • Both refining surfaces 2,3 are each made up of several refining plates, as in FIG. 2 and 4 represented, formed, which extend over in each case a peripheral segment of the corresponding grinding surface 2.3. Sequentially juxtaposed in the circumferential direction, the refining plates yield a continuous grinding surface 2, 3.
  • the refining plates and thus also the grinding surfaces are 2.3, as in the FIGS. 2 to 4 shown formed by a plurality of substantially radially extending Mahlleisten 4 and grooves 5 therebetween.
  • Mahlleisten 4 also called knife
  • the grooves 5 extending between the milling strips 4 likewise have a rectangular cross-section and serve as flow channels for the fiber suspension S.
  • the groove depth is usually between 2 and 20 mm.
  • Essential to the invention here is that the distance between the radially inner end of all grinding bars 4 both grinding surfaces of the rotation axis 6 by a maximum of 10%, based on the radial maximum length of the grinding bars 4, with each other. Disregarded here are interruptions of Mahlleisten 4, as required in the segmentation of the grinding surface in refining plates or holes 8 for the attachment of the refining plates.
  • the location of the pitch varies with respect to its distance from the axis of rotation 6. Also a multiple division of a grinding bar 4 radially behind each other is possible.
  • the pitch between the pitch and the rotation axis 6 continuously increases in small steps, so that the circumferentially adjacent pitches are spiral. This contributes significantly to the reduction in price.
  • the length of the dividing section 9 is between 10 and 50 mm.
  • FIG. 4 shows some or, as in FIG. 2 shown, many Mahlleisten 4 in two Mahlbars 4 share.
  • FIG. 4 also shows the possibility that a mill bar 4 radially in succession several times in each case two Mahlleisten 4 shares.
  • the grinding bars 4 run parallel outside the dividing sections 9, wherein, in particular, the non-dividing grinding bars 4 correspond FIG. 4 may have one or more bends.
  • the width of the grooves 5 between the grinding bars 4 outside the, following a division following division sections 9 is the same size.
  • the grinding surface is used extensively, which is why the radially inner end of all grinding strips 4 of both grinding surfaces 2,3 is equidistant from the axis of rotation 6.
  • the radially inner ends of the grinding bars 4 according to FIG. 4 generate additional turbulence and thus improve the collection of the fibers of the pulp suspension S between the grinding bars 4. Therefore, milling strips 4 alternate here in the circumferential direction with a short distance and with a long distance to the axis of rotation 6.

Landscapes

  • Crushing And Grinding (AREA)
  • Paper (AREA)
  • Crushing And Pulverization Processes (AREA)
EP15808576.1A 2015-02-10 2015-12-11 Mahlgarnitur Active EP3256640B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015202318.4A DE102015202318A1 (de) 2015-02-10 2015-02-10 Mahlgarnitur
PCT/EP2015/079376 WO2016128092A1 (de) 2015-02-10 2015-12-11 Mahlgarnitur

Publications (2)

Publication Number Publication Date
EP3256640A1 EP3256640A1 (de) 2017-12-20
EP3256640B1 true EP3256640B1 (de) 2018-11-21

Family

ID=54849922

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15808576.1A Active EP3256640B1 (de) 2015-02-10 2015-12-11 Mahlgarnitur

Country Status (6)

Country Link
EP (1) EP3256640B1 (zh)
CN (1) CN107109789B (zh)
DE (2) DE102015202318A1 (zh)
ES (1) ES2710324T3 (zh)
PT (1) PT3256640T (zh)
WO (1) WO2016128092A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017120162A1 (de) * 2017-09-01 2019-03-07 Voith Patent Gmbh Konische Mahlanordnung
US11643779B2 (en) * 2019-12-13 2023-05-09 Andritz Inc. Refiner plate having grooves imparting rotational flow to feed material
CN114438810B (zh) * 2022-01-24 2023-12-29 丹东鸭绿江磨片有限公司 一种具有狭管齿型的磨片或磨盘及磨浆机

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US100537A (en) * 1870-03-08 Improved mill-stone dress
US3059863A (en) * 1959-04-06 1962-10-23 Bolton John W & Sons Inc Segmental filling for refiner plugs
DE69813910T2 (de) * 1998-08-19 2004-02-12 Durametal Corp., Tualatin Refinerscheibe mit schikanen
DE102012214980A1 (de) * 2012-08-23 2014-02-27 Voith Patent Gmbh Kegelrefiner
CN203200584U (zh) * 2013-03-27 2013-09-18 杭州江菱造纸机械设备厂 新型节能磨浆机低压磨片
CN204224912U (zh) * 2014-09-05 2015-03-25 福伊特专利有限公司 一种造纸磨浆用的磨片

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CN107109789A (zh) 2017-08-29
DE202015009379U1 (de) 2017-05-02
WO2016128092A1 (de) 2016-08-18
EP3256640A1 (de) 2017-12-20
CN107109789B (zh) 2019-12-20
ES2710324T3 (es) 2019-04-24
DE102015202318A1 (de) 2016-08-11
PT3256640T (pt) 2019-02-12

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