EP3650123A1 - Ring gap grinder - Google Patents
Ring gap grinder Download PDFInfo
- 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
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- 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.)
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Classifications
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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
- 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
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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
- 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
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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
- 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.
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Abstract
Es wird ein allgemein zylinderförmiger Rotor (1) für eine Rührwerksmühle bereitgestellt. Der Rotor weist eine Rotorwand (11), mehrere an der Rotorwand angebrachte Werkzeuge (13), einen Rotortrennring (12), eine Rotornabe (14) und mindestens eine Zugstange (15) auf. Die Rotorwand (11) und der Rotortrennring (12) sind mittels der Zugstangen (15) in der Nabe (14) eingespannt. Der Rotortrennring (12) ist als rotationssymmetrischer Hohlzylinder ausgeführt. Die Rotorwand (11) ist zu einer Drehachse (19) rotationssymmetrisch und zu einer Symmetrieebene senkrecht zur Drehachse spiegelsymmetrisch. Ferner werden eine Mühle mit dem erfindungsgemäßen Rotor, ein Verfahren zur Wartung der Mühle und eine Statorpackung zur Verwendung in einer Mühle bereitgestellt.A generally cylindrical rotor (1) for an agitator mill is provided. The rotor has a rotor wall (11), several tools (13) attached to the rotor wall, a rotor separating ring (12), a rotor hub (14) and at least one tie rod (15). The rotor wall (11) and the rotor separating ring (12) are clamped in the hub (14) by means of the tie rods (15). The rotor separating ring (12) is designed as a rotationally symmetrical hollow cylinder. The rotor wall (11) is rotationally symmetrical to an axis of rotation (19) and mirror-symmetrical to a plane of symmetry perpendicular to the axis of rotation. Furthermore, a mill with the rotor according to the invention, a method for maintaining the mill and a stator packing for use in a mill are provided.
Description
Die Erfindung betrifft einen Rotor einer Rührwerksmühle, insbesondere einer Ringspaltmühle.The invention relates to a rotor of an agitator mill, in particular an annular gap mill.
Rührwerksmühlen haben ein breites Anwendungsspektrum beim Vermahlen und Dispergieren von Feststoffen in Flüssigkeiten. Sie finden beispielsweise bei der Herstellung von Klebstoffen, Druckfarben, Kosmetik oder Pharmaka Anwendung. Eine gängige Bauform ist die Ringsspaltmühle, in der in einem Mahlraum zwischen Rotor und Stator mittels Mahlhilfskörpern Dispersionen hergestellt werden. Hierfür können am Rotor und/oder am Stator Mahlwerkzeuge, beispielsweise in Form runder Stifte, angebracht sein. Das Mahlgut wird über einen Zufuhrkanal in den Mahlraum geführt, dort vermahlen und über eine Trenneinrichtung, die die Mahlhilfskörper zurückhält, abgeführt. Die Trenneinrichtung besteht oftmals aus einem Trennsieb, kann aber auch als Spalt ausgeführt werden.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. For this purpose, 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.
Ringspaltmühlen weisen in der Regel eine lange Verweilzeit des Produkts sowie eine Pfropfenströmung im Inneren auf. Durch die Schleppkräfte befinden sich ausgangsseitig besonders viele Mahlkörper, wodurch es zu einem erhöhten Verschleiß sowohl der Trenneinrichtung als auch des Stators, des Rotors und den daran angebrachten Werkzeugen an dieser Stelle kommt. Dies führt zu einer asymmetrischen Abnutzung der Bauteile, was einen häufigen Austausch bestimmter Baugruppen nach sich zieht.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.
Ziel der vorliegenden Erfindung ist es somit, die Verwendungsdauer der Bauteile, insbesondere des Rotors, zu verlängern. Diese Aufgabe wird erfindungsgemäß durch die Merkmale der unabhängigen Ansprüche gelöst; die abhängigen Ansprüche beschreiben Ausführungsformen der Erfindung.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.
Durch die Erfindung wird ein allgemein zylinderförmiger Rotor für eine Rührwerksmühle bereitgestellt. Der Rotor weist eine Rotorwand, mehrere an der Rotorwand angebrachte Werkzeuge, einen Rotortrennring, eine Rotornabe und mindestens eine Zugstange auf. Die Rotorwand und der Rotortrennring sind mittels der Zugstangen in der Nabe eingespannt und werden so zusammengehalten. Der Rotortrennring ist als rotationssymmetrischer Hohlzylinder ausgeführt. Die Rotorwand ist zu einer Drehachse rotationssymmetrisch und zu einer Symmetrieebene senkrecht zur Drehachse spiegelsymmetrisch. Vorzugsweise gilt dies auch für die Anordnung der Werkzeuge an der Rotorwand. Der Rotortrennring sollte aus einem sehr widerstandsfähigen Material wie Keramik, Hartmetall, gehärtetem Metall o.ä. geformt sein.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.
Weiterhin wird eine Mühle zum Behandeln von fließfähigem Mahlgut mit dem erfindungsgemäßen Rotor bereitgestellt. Die Mühle weist ferner einen Stator mit einer im Allgemeinen zylinderförmigen Statorinnenwand, einen Produktzulauf und einen Produktablauf auf. Der Rotor ist innerhalb des Stators angeordnet, wobei zwischen einer Statorinnenwand und der Rotorwand ein Mahlraum ausgebildet ist. Das Mahlgut kann über den Produktzulauf in den Mahlraum und über den Produktablauf aus dem Mahlraum geführt werden. Zusätzlich weist die Mühle einen Statortrennring auf, der vorzugsweise im Wesentlichen eine Seitenfläche der Mahlraums bildet und zusammen mit dem Rotortrennring den Spalt bildet, der für die Abtrennung des Mahlguts von gegebenenfalls im Mahlraum angeordneten Mahlhilfskörpern dient. Dieser Spalt wird auch als Trennspalt bezeichnet. Der Statortrennring ist vorzugsweise ebenfalls als rotationssymmetrischer Hohlzylinder ausgeführt und aus Keramik, Hartmetall oder einem gehärteten Metall gebildet.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. In addition, 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.
Gemäß einer Ausführungsform ist auch die Statorinnenwand rotationssymmetrisch zu der Drehachse und spiegelsymmetrisch zu der Symmetrieebene. Sind auch an der Statorinnenwand Mahlwerkzeuge angeordnet, sollte auch die Anordnung der Mahlwerkzeuge rotationssymmetrisch zu der Drehachse und spiegelsymmetrisch zu der Symmetrieebene sein.According to one embodiment, 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.
Gemäß einer Ausführungsform beträgt die Mahlspaltweite, d.h. die Breite des Mahlraums, zwischen 20 und 60 mm, das Verhältnis der Statorlänge zum Statorinnendurchmesser zwischen 2 und 4 und/oder das Verhältnis der Statorlänge zur Mahlspaltweite 15 bis 30.According to one embodiment, 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
Sind Bauteile der Mühle abgenutzt, können bei einer Wartung der Mühle die symmetrisch aufgebauten Bauteile gedreht wieder eingesetzt und so weiterverwendet werden. Dies kann durch das erfindungsgemäße Verfahren zum Warten einer Mühle geschehen. So kann die Verwendungsdauer solcher Bauteile, also insbesondere der Rotors, des Stators, sowie der Rotor- und Statortrennringe verlängert werden.If components of the mill are worn out, 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.
Weitere Merkmale, Vorteile und Einzelheiten ergeben sich aus den nachfolgenden Figuren. Gleiche Bezugszeichen benennen hierbei gleiche oder ähnliche Elemente. Es zeigen
-
Fig. 1 : eine Ringsspaltmühle gemäß einer Ausführungsform der vorliegenden Erfindung, -
Fig. 2 : eine Ausschnittsansicht des Trennspalts der Ringsspaltmühle ausFig. 1 mit Rotor- und Statortrennring und -
Fig. 3 die Rotorbaugruppe der Ringspaltmühle ausFig. 1 .
-
Fig. 1 : an annular gap mill according to an embodiment of the present invention, -
Fig. 2 : a sectional view of the separation gap of the annular gap mill fromFig. 1 with rotor and stator separator ring and -
Fig. 3 the rotor assembly of the annular gap millFig. 1 .
Die in
Das Produkt gelangt über einen Produktzulauf 41 in den Mahlraum 7 und wird dort mithilfe von Mahlhilfskörpern 3 dispergiert bzw. vermahlen. Der Produktfluss ist mit dunklen Pfeilen gekennzeichnet. Um zu verhindern, dass die Mahlhilfskörper 3 mit dem fertigen Produkt in den Produktablauf 42 gelangen, sind auslaufseitig sowohl am Rotor 1 als auch am Stator 2 Trennringe 12, 22 angebracht. Diese bilden einen Spalt s aus, der so bemessen ist, dass die Mahlhilfskörper 3 den Mahlraum 7 nicht verlassen können. Insbesondere ist der Spalt bzw. Trennspalt s also kleiner als der Durchmesser der verwendeten Mahlhilfskörper 3. Werden also beispielsweise Mahlhilfskörper mit einem typischen Durchmesser von 2 mm verwendet sollte der Trennspalt s entsprechend kleiner ausgestaltet sein und beispielsweise etwa 1 mm betragen. Ein ähnliches Verhältnis sollte entsprechend bei anders bemessenen Mahlhifsköper gelten, wobei der Durchmesser der Mahlhilfskörper je nach Anwendung und eingesetzter Mühle zwischen wenigen Mikrometern bis zu mehreren Millimetern variieren kann.The product reaches the
Die Trenneinrichtung mit Spalt s, auch Trennspalt genannt, ist in der
Da der Verschleiß einseitig und somit asymmetrisch erfolgt, müssen aufgrund des Aufbaus bei herkömmlichen Mühlen auch Bauteile gewechselt werden, bei denen die dem Trennspalt s abgewandte Seite wenig oder gar nicht verschlissen ist. Um die verschleißintensiven Bauteile, d.h. Rotorwand 11, Statorinnenwand 21, Rotortrennring 12 und Statortrennring 22, länger verwenden zu können, sind diese gemäß der vorliegenden Erfindung symmetrisch aufgebaut. Insbesondere ist die Rotorwand 11 mit den daran angebrachten Werkzeugen 13 rotationssymmetrisch und symmetrisch zu einer Symmetrie- bzw. Schnittebene senkrecht zur Drehachse 19 ausgebildet. Ferner ist auch die Statorinnenwand 21 mit gegebenenfalls darauf angeordneten Werkzeugen so konstruiert, dass diese nach einer Drehung um 180° senkrecht zur Drehachse 19 wieder eingebaut werden kann. Der Stator 2 mit Statorinnenwand 21 ist somit als Statorpackung ausgeführt, die zwischen einem Deckel und einem Austrittsflansch der Rührwerksmühle gebildet und dadurch definiert ist. Der Deckel ist hierbei an der Produkteinlaufseite der Rührwerksmühle angeordnet, der Austrittsflansch produktauslaufseitig, dies sind jedoch nur terminologische und keine baulichen Definitionen. Die Statorinnenwand 21 ist dabei ebenfalls spiegelsymmetrisch zu der Schnittebene senkrecht zur Drehachse 19. Rotortrennring 12 und Statortrennring 22 sind als rotationssymmetrische Hohlzylinder ausgeführt. Auch diese können somit gedreht und wieder eingebaut werden.Since the wear occurs on one side and thus asymmetrically, due to the structure of conventional mills, components must also be replaced in which the side facing away from the separation gap s is little or not worn. To the wear-intensive components, i.e.
Dadurch können bei Verschleißerscheinungen die Anlage auseinandergebaut und die betreffenden Bauteile, Rotor 1 und Stator 2, Rotortrennring 12 sowie Statortrennring 22, umgedreht und wieder verwendet werden. Dies kann die Benutzungsdauer der jeweiligen Komponenten verdoppeln und stellt so eine im Vergleich zu herkömmlichen Anlagen wesentlich nachhaltigere Verwendung dar.As a result, if there are signs of wear, the system can be disassembled and the relevant components,
Eine Dichtigkeitsprüfung des Rotors 1 kann an der vormontierten Baugruppe vorgenommen werden.A leak test of the
Wegen der Hitzeentwicklung beim Vermahlen können, um die Belastung auf die Bauteile und somit den Verschleiß zu verringern, sowohl Rotor 1 als auch Stator 2 gekühlt werden. Hierfür wird ein Kühlmittel durch den Kühlmittelzulauf 51, 61 ins Innere des Rotors 1 bzw. Stators 2 geleitet. Nach erfolgtem Wärmetausch wird das Kühlmittel durch den Kühlmittelablauf 52, 62 aus dem Rotor 1 bzw. Stator 2 abgeleitet und dem Kühlmittelkreislauf zugeführt. Der Kühlmittelfluss ist in der
Die Mahlspaltweite S, d.h. die Breite des Mahlraums 7 zwischen Statorinnenwand 21 und Rotorwand 11, ist bevorzugt im Bereich 20-60 mm, besonders bevorzugt im Bereich 35-55 mm und kann im Speziellen 36-45 mm betragen. L bezeichnet die Länge der Statorinnenwand 21, D den Innendurchmesser des Stators und d den Außendurchmesser des Rotors 1 unter Vernachlässigung der Mahlwerkzeuge 13. Das bevorzugte Verhältnis L/D ist im Bereich 2-4 oder im Bereich 2,7-3,3. Das Verhältnis L/S ist bevorzugt im Bereich 15-30 oder 18-25.The grinding gap width S, ie the width of the grinding
Durch den symmetrischen Aufbau der verschleißintensiven Bauteile von Rotor, Stator und Trenneinrichtung können beschädigte oder verschlissene Bauteile mit geringem Aufwand umgedreht und wiederverwendet werden und somit die Verwendungsdauer erheblich erhöht werden. Hierzu ist ferner die Rotorbaugruppe mit einer axialen Spannvorrichtung versehen, um einen einfachen und schnellen Aus- und Umbau gewährleisten zu können. Dies ermöglicht eine wesentlich ressourcenschonendere und wirtschaftlichere Arbeitsweise im Vergleich zu herkömmlichen Rührwerksmühlen und sorgt so für einen nachhaltigen Betrieb. Desweiteren kann je nach Verschleiß auch lediglich die Rotorbaugruppe ersetzt werden. Dies erlaubt neben der höheren Nachhaltigkeit auch eine erhöhte Flexibilität im Einsatz der Rührwerksmühle.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. For this purpose, 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. Furthermore, depending on wear, only the rotor assembly can be replaced. In addition to greater sustainability, this also allows increased flexibility in the use of the agitator mill.
Ferner kann durch den Austausch eines der Trennringe 12, 22 die Trennspaltweite s einfach verändert und so an unterschiedliche Produkte oder Mahlhilfskörpergrößen angepasst werden.Furthermore, by exchanging one of the separating rings 12, 22, the separating gap width s can easily be changed and thus adapted to different products or grinding aid body sizes.
- 11
- Rotorrotor
- 1111
- RotorwandRotor wall
- 1212
- RotortrennringRotor separator ring
- 1313
- MahlwerkzeugeGrinding tools
- 1414
- RotornabeRotor hub
- 1515
- Zugstangepull bar
- 1919th
- DrehachseAxis of rotation
- 22nd
- Statorstator
- 2121
- StatorinnenwandInner stator wall
- 2222
- StatortrennringStator separator ring
- 33rd
- MahlhilfskörperGrinding aid body
- 4141
- ProduktzulaufProduct inflow
- 4242
- ProduktablaufProduct flow
- 5151
- Kühlmittelzulauf RotorCoolant inlet rotor
- 5252
- Kühlmittelablauf RotorCoolant drain rotor
- 6161
- Kühlmittelzulauf StatorCoolant inlet stator
- 6262
- Kühlmittelablauf StatorCoolant drain stator
- 77
- MahlraumGrinding room
- dd
- Außendurchmesser des RotorsOutside diameter of the rotor
- DD
- Innendurchmesser des StatorsInner diameter of the stator
- LL
- Länge der StatorinnenwandLength of the stator inner wall
- ss
- TrennspaltSeparation gap
- SS
- MahlspaltGrinding gap
Claims (15)
Ausbauen der Statorinnenwand (21) und des Statortrennrings (22) aus der Mühle, Drehen der Statorinnenwand (21) und/oder des Statortrennrings (22) um eine senkrecht durch die Drehachse (19) verlaufende Rotationsachse um 180°, Einbauen der Statorinnenwand (21) und des Statortrennrings (22) in umgedrehter Ausrichtung in die Mühle.The method of claim 13, wherein the method between the step of installing and the step of removing further comprises the step of:
Removing the inner stator wall (21) and the stator separating ring (22) from the mill, rotating the inner stator wall (21) and / or the stator separating ring (22) about a rotation axis running perpendicularly through the axis of rotation (19) by 180 °, installing the inner stator wall (21 ) and the stator separating ring (22) in the reverse orientation into the mill.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP18205435.3A EP3650123A1 (en) | 2018-11-09 | 2018-11-09 | Ring gap grinder |
US17/291,779 US20210387201A1 (en) | 2018-11-09 | 2019-11-06 | Annular-gap mill |
JP2021524977A JP7203968B2 (en) | 2018-11-09 | 2019-11-06 | annular gap mill |
PCT/EP2019/080356 WO2020094696A1 (en) | 2018-11-09 | 2019-11-06 | Annular-gap mill |
CN201980073658.6A CN112969537B (en) | 2018-11-09 | 2019-11-06 | Circular seam mill |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP18205435.3A EP3650123A1 (en) | 2018-11-09 | 2018-11-09 | Ring gap grinder |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3650123A1 true EP3650123A1 (en) | 2020-05-13 |
Family
ID=64270719
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18205435.3A Pending EP3650123A1 (en) | 2018-11-09 | 2018-11-09 | Ring gap grinder |
Country Status (5)
Country | Link |
---|---|
US (1) | US20210387201A1 (en) |
EP (1) | EP3650123A1 (en) |
JP (1) | JP7203968B2 (en) |
CN (1) | CN112969537B (en) |
WO (1) | WO2020094696A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115364959B (en) * | 2022-08-24 | 2024-06-25 | 天蓝颜料(山东)有限公司 | Vertical grinder |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3614721A1 (en) * | 1986-04-30 | 1987-11-05 | Buehler Ag Geb | Agitator mill |
JP2005262027A (en) * | 2004-03-17 | 2005-09-29 | Inoue Mfg Inc | Wet type medium dispersing machine |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3653600A (en) * | 1969-07-28 | 1972-04-04 | George R Schold | Apparatus for dispersing finely divided solid particles in a liquid vehicle |
DE2629251C2 (en) * | 1976-06-30 | 1987-03-19 | Draiswerke Gmbh, 6800 Mannheim | Agitator mill |
DE3244308C2 (en) * | 1981-12-02 | 1994-06-01 | Buehler Ag Geb | Agitator ball mill |
DE3245825C2 (en) * | 1982-12-10 | 1994-01-27 | Buehler Ag Geb | Agitator mill |
GB8700984D0 (en) * | 1987-01-17 | 1987-02-18 | Yorkshire Chemicals Ltd | Abrasive medium mill |
DE4009092C1 (en) * | 1990-03-21 | 1991-05-23 | Erich Netzsch Gmbh & Co Holding Kg, 8672 Selb, De | |
CH688849A5 (en) * | 1993-02-25 | 1998-04-30 | Buehler Ag | Agitator mill. |
CN1307934A (en) * | 2001-02-12 | 2001-08-15 | 宜兴市洪流集团公司 | Improved sand mill |
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 |
DE502005000670D1 (en) * | 2005-05-19 | 2007-06-14 | Buehler Ag | agitating mill |
CN101884947B (en) * | 2005-10-11 | 2011-07-20 | 比勒股份公司 | Agitation grinder |
CN102085495A (en) * | 2009-12-05 | 2011-06-08 | 昆山密友粉碎设备有限公司 | High-performance sand mill |
CN102688793B (en) * | 2012-06-14 | 2014-04-16 | 昆山聚贝机械设计有限公司 | Ball mill |
CN203030337U (en) * | 2012-12-26 | 2013-07-03 | 广州派勒机械设备有限公司 | Dynamic separation discharge type grinding machine |
CN103706444B (en) * | 2013-12-20 | 2016-08-17 | 广东派勒智能纳米科技股份有限公司 | A kind of nano bead mill |
CN207576551U (en) * | 2017-10-12 | 2018-07-06 | 昆明理工大学 | A kind of semi-autogenous mill liner plate with hard load bearing unit lifting strip |
CN207805770U (en) * | 2017-12-10 | 2018-09-04 | 丹阳市科达镀膜材料有限公司 | A kind of Coating Materials grinding device easy to use |
CN208082605U (en) * | 2017-12-31 | 2018-11-13 | 广州中卓智能装备有限公司 | A kind of gap separate grinding machine |
CN208082607U (en) * | 2017-12-31 | 2018-11-13 | 广州中卓智能装备有限公司 | A kind of separator of beforehand research grind materials |
CN108452896A (en) * | 2017-12-31 | 2018-08-28 | 广州中卓智能装备有限公司 | A kind of gap separate grinding machine |
CN108751092A (en) * | 2018-08-01 | 2018-11-06 | 贵州太朴生态农业有限公司 | A kind of chili oil heat preservation homogeneous stirring filling apparatus |
-
2018
- 2018-11-09 EP EP18205435.3A patent/EP3650123A1/en active Pending
-
2019
- 2019-11-06 WO PCT/EP2019/080356 patent/WO2020094696A1/en active Application Filing
- 2019-11-06 CN CN201980073658.6A patent/CN112969537B/en active Active
- 2019-11-06 JP JP2021524977A patent/JP7203968B2/en active Active
- 2019-11-06 US US17/291,779 patent/US20210387201A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3614721A1 (en) * | 1986-04-30 | 1987-11-05 | Buehler Ag Geb | Agitator mill |
JP2005262027A (en) * | 2004-03-17 | 2005-09-29 | Inoue Mfg Inc | Wet type medium dispersing machine |
Also Published As
Publication number | Publication date |
---|---|
JP7203968B2 (en) | 2023-01-13 |
CN112969537B (en) | 2023-05-09 |
JP2022506873A (en) | 2022-01-17 |
US20210387201A1 (en) | 2021-12-16 |
CN112969537A (en) | 2021-06-15 |
WO2020094696A1 (en) | 2020-05-14 |
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