EP3650123A1 - Broyeur à passage annulaire - Google Patents

Broyeur à passage annulaire Download PDF

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Publication number
EP3650123A1
EP3650123A1 EP18205435.3A EP18205435A EP3650123A1 EP 3650123 A1 EP3650123 A1 EP 3650123A1 EP 18205435 A EP18205435 A EP 18205435A EP 3650123 A1 EP3650123 A1 EP 3650123A1
Authority
EP
European Patent Office
Prior art keywords
rotor
stator
wall
separating ring
mill
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.)
Pending
Application number
EP18205435.3A
Other languages
German (de)
English (en)
Inventor
Cornel Fraefel
Eduard Nater
Achim Philipp Sturm
Pascal EGGER
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.)
Buehler AG
Original Assignee
Buehler AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Buehler AG filed Critical Buehler AG
Priority to EP18205435.3A priority Critical patent/EP3650123A1/fr
Priority to US17/291,779 priority patent/US20210387201A1/en
Priority to CN201980073658.6A priority patent/CN112969537B/zh
Priority to JP2021524977A priority patent/JP7203968B2/ja
Priority to PCT/EP2019/080356 priority patent/WO2020094696A1/fr
Publication of EP3650123A1 publication Critical patent/EP3650123A1/fr
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
    • B02C17/166—Mills in which a fixed container houses stirring means tumbling the charge of the annular gap type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18—Details

Definitions

  • the invention relates to a rotor of an agitator mill, in particular an annular gap mill.
  • Agitator mills have a wide range of applications for grinding and dispersing solids in liquids. They are used, for example, in the manufacture of adhesives, printing inks, cosmetics or pharmaceuticals.
  • a common design is the annular gap mill, in which dispersions are produced in a grinding chamber between the rotor and stator using auxiliary grinding bodies.
  • grinding tools for example in the form of round pins, can be attached to the rotor and / or the stator.
  • the regrind is fed into the grinding chamber via a feed channel, milled there and removed via a separating device which retains the auxiliary grinding bodies.
  • the separating device often consists of a separating sieve, but can also be designed as a gap.
  • Annular gap mills generally have a long dwell time for the product and a plug flow inside. Due to the drag forces, there are a particularly large number of grinding media on the output side, which leads to increased wear both at the separating device and at the stator, the rotor and the tools attached to it at this point. This leads to asymmetrical wear of the components, which results in frequent replacement of certain assemblies.
  • the aim of the present invention is therefore to extend the period of use of the components, in particular of the rotor. This object is achieved by the features of the independent claims; the dependent claims describe embodiments of the invention.
  • the invention provides a generally cylindrical rotor for an agitator mill.
  • the rotor has one rotor wall, several attached to the rotor wall Tools, a rotor separation ring, a rotor hub and at least one tie rod.
  • the rotor wall and the rotor separating ring are clamped in the hub by means of the tie rods and are thus held together.
  • the rotor separation ring is designed as a rotationally symmetrical hollow cylinder.
  • the rotor wall is rotationally symmetrical to an axis of rotation and mirror-symmetrical to a plane of symmetry perpendicular to the axis of rotation. This preferably also applies to the arrangement of the tools on the rotor wall.
  • the rotor separation ring should be made of a very resistant material such as ceramic, hard metal, hardened metal or the like. be shaped.
  • a mill for treating flowable regrind with the rotor according to the invention is also provided.
  • the mill also has a stator with a generally cylindrical inner stator wall, a product inlet and a product outlet.
  • the rotor is arranged within the stator, a grinding chamber being formed between an inner wall of the stator and the rotor wall.
  • the regrind can be fed into the grinding chamber via the product inlet and out of the grinding chamber via the product outlet.
  • the mill has a stator separating ring which preferably essentially forms a side face of the grinding chamber and, together with the rotor separating ring, forms the gap which is used to separate the grinding stock from auxiliary grinding bodies which may be arranged in the grinding chamber. This gap is also called the separation gap.
  • the stator separating ring is preferably also designed as a rotationally symmetrical hollow cylinder and made of ceramic, hard metal or a hardened metal.
  • the inner stator wall is also rotationally symmetrical to the axis of rotation and mirror-symmetrical to the plane of symmetry. If grinding tools are also arranged on the inner wall of the stator, the arrangement of the grinding tools should also be rotationally symmetrical to the axis of rotation and mirror-symmetrical to the plane of symmetry.
  • the grinding gap width i.e. the width of the grinding chamber, between 20 and 60 mm, the ratio of the stator length to the inside diameter of the stator between 2 and 4 and / or the ratio of the stator length to the grinding gap width 15 to 30.
  • the symmetrically constructed components can be rotated and used again during maintenance of the mill and can thus be reused. This can be done by the method according to the invention for the maintenance of a mill. So it can The service life of such components, in particular the rotor, the stator, and the rotor and stator separating rings can be extended.
  • the annular gap mill shown has a grinding chamber 7 in the usual way, which is formed between a stator inner wall 21 and a rotor wall 11 of a rotor 1.
  • the rotor 1 is rotatably mounted about a central longitudinal axis 19.
  • Grinding tools 13, which protrude into the grinding chamber 7, can be attached to a rotor wall 11.
  • the grinding tools 13 can be designed, for example, as round pins, but other shapes can also be useful. Tools can optionally also be attached to the inner wall of the stator 21.
  • the product reaches the grinding chamber 7 via a product inlet 41 and is dispersed or ground there with the aid of auxiliary grinding bodies 3.
  • the product flow is marked with dark arrows.
  • separating rings 12, 22 are attached on the outlet side to both the rotor 1 and the stator 2. These form a gap s which is dimensioned such that the auxiliary grinding bodies 3 cannot leave the grinding chamber 7.
  • the gap or separating gap s is therefore smaller than the diameter of the auxiliary grinding bodies 3 used. If, for example, auxiliary grinding bodies with a typical diameter of 2 mm are used, the separating gap s should be correspondingly smaller and be, for example, approximately 1 mm.
  • a similar ratio should apply accordingly to differently sized grinding aids, the diameter of the auxiliary grinding bodies depending on the application and the mill used being able to vary between a few micrometers and several millimeters.
  • the separation device with gap s is in the Fig. 2 shown, which is a detailed view of Fig. 1 is.
  • the separator rings 12, 22 are preferably made of a very resistant material such as ceramic, hardened metal, hard metal or similar shaped. Due to the drag forces generated during grinding, the concentration of auxiliary grinding bodies 3 on the separating device formed by rotor separating ring 12 and stator separating ring 22 is particularly high. This leads to high wear of the separating rings 12, 22 and the rows of grinding tools 13 located in the vicinity of the separating device, the grinding tools optionally arranged on the stator inner wall 21 and the rotor and stator inner wall surfaces on the output side. In particular, the areas of the first two to three rows of the grinding tools, which are arranged closest to the separating device, and the sides of the rotor separating ring 12 or stator separating ring 22 facing the grinding chamber 7 are affected.
  • Rotor wall 11 inner stator wall 21, rotor separating ring 12 and stator separating ring 22 can be used longer, these are constructed symmetrically according to the present invention.
  • the rotor wall 11 with the tools 13 attached to it is rotationally symmetrical and symmetrical to a plane of symmetry or section perpendicular to the axis of rotation 19.
  • the inner stator wall 21 is also constructed, with tools possibly arranged thereon, in such a way that it can be reinstalled after rotation through 180 ° perpendicular to the axis of rotation 19.
  • the stator 2 with the stator inner wall 21 is thus designed as a stator packing, which is formed between a cover and an outlet flange of the agitator mill and is thereby defined.
  • the cover is arranged on the product inlet side of the agitator mill, the outlet flange on the product outlet side, but these are only terminological and not structural definitions.
  • the inner stator wall 21 is also mirror-symmetrical to the section plane perpendicular to the axis of rotation 19.
  • the rotor separating ring 12 and the stator separating ring 22 are designed as rotationally symmetrical hollow cylinders. These can also be rotated and reinstalled.
  • FIG. 3 finally shows the structure of the rotor assembly Fig. 1 .
  • the rotor assembly 1 consists of the rotor wall 11 with the grinding tools 13 attached to it and the rotor separating ring 12. These components are fixed on a hub 14 which is held together by means of at least one tie rod 15.
  • the tie rods 15 clamp opposite parts of the hub 14, between which the rotor wall 11 and the rotor separating ring 12 are inserted, and thus serve as an axial clamping device.
  • the entire assembly can thus be taken apart very easily and, due to the symmetrical construction of the rotor wall 11, can be assembled with grinding tools 13 and the rotor separating ring 12 in the event of uneven wear.
  • Tensioners other than tie rods can also be useful.
  • a leak test of the rotor 1 can be carried out on the preassembled module.
  • both rotor 1 and stator 2 can be cooled in order to reduce the stress on the components and thus wear.
  • a coolant is passed through the coolant inlet 51, 61 into the interior of the rotor 1 or stator 2. After the heat exchange has taken place, the coolant is discharged through the coolant outlet 52, 62 from the rotor 1 or stator 2 and fed to the coolant circuit.
  • the coolant flow is in the Fig. 1 marked with bright arrows.
  • the coolant inlet of the stator 61 and the coolant outlet of the stator 62 can each be arranged at opposite ends of the stator and offset by 180 ° with respect to the central longitudinal axis 19.
  • the inlet acts as an outlet and the outlet is then used as an inlet.
  • the stator 2 in this embodiment is mirror-symmetrical to a diagonal axis.
  • the grinding gap width S ie the width of the grinding chamber 7 between the inner wall of the stator 21 and the rotor wall 11, is preferably in the range 20-60 mm, particularly preferably in the range 35-55 mm and can be in particular 36-45 mm.
  • L denotes the length of the inner stator wall 21, D the inner diameter of the stator and d the outer diameter of the rotor 1, neglecting the grinding tools 13.
  • the preferred ratio L / D is in the range 2-4 or in the range 2.7-3.3.
  • the ratio L / S is preferably in the range 15-30 or 18-25.
  • the rotor assembly Due to the symmetrical structure of the wear-intensive components of the rotor, stator and separating device, damaged or worn components can be turned over and reused with little effort, thus increasing the service life considerably.
  • the rotor assembly is also provided with an axial tensioning device in order to ensure that it can be removed and converted easily and quickly. This enables a much more resource-efficient and economical way of working compared to conventional agitator mills and thus ensures sustainable operation.
  • only the rotor assembly can be replaced. In addition to greater sustainability, this also allows increased flexibility in the use of the agitator mill.
  • the separating gap width s can easily be changed and thus adapted to different products or grinding aid body sizes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
EP18205435.3A 2018-11-09 2018-11-09 Broyeur à passage annulaire Pending EP3650123A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP18205435.3A EP3650123A1 (fr) 2018-11-09 2018-11-09 Broyeur à passage annulaire
US17/291,779 US20210387201A1 (en) 2018-11-09 2019-11-06 Annular-gap mill
CN201980073658.6A CN112969537B (zh) 2018-11-09 2019-11-06 环缝磨
JP2021524977A JP7203968B2 (ja) 2018-11-09 2019-11-06 環状ギャップミル
PCT/EP2019/080356 WO2020094696A1 (fr) 2018-11-09 2019-11-06 Moulin à espace annulaire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18205435.3A EP3650123A1 (fr) 2018-11-09 2018-11-09 Broyeur à passage annulaire

Publications (1)

Publication Number Publication Date
EP3650123A1 true EP3650123A1 (fr) 2020-05-13

Family

ID=64270719

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18205435.3A Pending EP3650123A1 (fr) 2018-11-09 2018-11-09 Broyeur à passage annulaire

Country Status (5)

Country Link
US (1) US20210387201A1 (fr)
EP (1) EP3650123A1 (fr)
JP (1) JP7203968B2 (fr)
CN (1) CN112969537B (fr)
WO (1) WO2020094696A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115364959B (zh) * 2022-08-24 2024-06-25 天蓝颜料(山东)有限公司 一种立式研磨机

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3614721A1 (de) * 1986-04-30 1987-11-05 Buehler Ag Geb Ruehrwerksmuehle
JP2005262027A (ja) * 2004-03-17 2005-09-29 Inoue Mfg Inc 湿式媒体分散機

Family Cites Families (21)

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US3653600A (en) * 1969-07-28 1972-04-04 George R Schold Apparatus for dispersing finely divided solid particles in a liquid vehicle
DE2629251A1 (de) * 1976-06-30 1978-01-12 Draiswerke Gmbh Ruehrwerksmuehle
DE3244308C2 (de) * 1981-12-02 1994-06-01 Buehler Ag Geb Rührwerkskugelmühle
DE3245825C2 (de) * 1982-12-10 1994-01-27 Buehler Ag Geb Rührwerksmühle
GB8700984D0 (en) * 1987-01-17 1987-02-18 Yorkshire Chemicals Ltd Abrasive medium mill
DE4009092C1 (fr) * 1990-03-21 1991-05-23 Erich Netzsch Gmbh & Co Holding Kg, 8672 Selb, De
CH688849A5 (de) * 1993-02-25 1998-04-30 Buehler Ag Ruehrwerksmuehle.
CN1307934A (zh) * 2001-02-12 2001-08-15 宜兴市洪流集团公司 一种改进的砂磨机
US20050258288A1 (en) * 2003-11-26 2005-11-24 E. I. Du Pont De Nemours And Company High pressure media milling system and process of forming particles
ATE361146T1 (de) * 2005-05-19 2007-05-15 Buehler Ag Rührwerksmühle
CN101884947B (zh) * 2005-10-11 2011-07-20 比勒股份公司 搅拌式研磨机
CN102085495A (zh) * 2009-12-05 2011-06-08 昆山密友粉碎设备有限公司 高性能砂磨机
CN102688793B (zh) * 2012-06-14 2014-04-16 昆山聚贝机械设计有限公司 珠磨机
CN203030337U (zh) * 2012-12-26 2013-07-03 广州派勒机械设备有限公司 一种动态分离出料式研磨机
CN103706444B (zh) * 2013-12-20 2016-08-17 广东派勒智能纳米科技股份有限公司 一种纳米珠磨机
CN207576551U (zh) * 2017-10-12 2018-07-06 昆明理工大学 一种具有硬质承载单元提升条的半自磨机衬板
CN207805770U (zh) * 2017-12-10 2018-09-04 丹阳市科达镀膜材料有限公司 一种使用方便的镀膜材料用粉碎装置
CN208082607U (zh) * 2017-12-31 2018-11-13 广州中卓智能装备有限公司 一种预研磨物料的分离装置
CN108452896A (zh) * 2017-12-31 2018-08-28 广州中卓智能装备有限公司 一种间隙分离式研磨机
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CN108751092A (zh) * 2018-08-01 2018-11-06 贵州太朴生态农业有限公司 一种油辣椒保温均质搅拌灌装装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3614721A1 (de) * 1986-04-30 1987-11-05 Buehler Ag Geb Ruehrwerksmuehle
JP2005262027A (ja) * 2004-03-17 2005-09-29 Inoue Mfg Inc 湿式媒体分散機

Also Published As

Publication number Publication date
JP7203968B2 (ja) 2023-01-13
CN112969537A (zh) 2021-06-15
CN112969537B (zh) 2023-05-09
US20210387201A1 (en) 2021-12-16
JP2022506873A (ja) 2022-01-17
WO2020094696A1 (fr) 2020-05-14

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