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EP2861351B1 - Rotor mill with direct or indirect cooling of the milling space - Google Patents

Rotor mill with direct or indirect cooling of the milling space Download PDF

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Publication number
EP2861351B1
EP2861351B1 EP13734354.7A EP13734354A EP2861351B1 EP 2861351 B1 EP2861351 B1 EP 2861351B1 EP 13734354 A EP13734354 A EP 13734354A EP 2861351 B1 EP2861351 B1 EP 2861351B1
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EP
European Patent Office
Prior art keywords
collecting container
cover
rotary mill
cooling
mill according
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
EP13734354.7A
Other languages
German (de)
French (fr)
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EP2861351A1 (en
Inventor
Matthias Niewind
Frank Janetta
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Retsch GmbH
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Retsch GmbH
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Publication of EP2861351A1 publication Critical patent/EP2861351A1/en
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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
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer 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
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/062—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives with rotor elements extending axially in close radial proximity of a concentrically arranged slotted or perforated ring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/16—Details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
    • B02C23/24—Passing gas through crushing or disintegrating zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C25/00—Control arrangements specially adapted for crushing or disintegrating

Definitions

  • the invention relates to a rotor mill for laboratory use with a rotor coupled to a drive motor as a grinding tool, arranged with a grinding chamber of the rotor ring sieve and arranged on the outer circumference of the ring sieve, insertable into the housing of the rotor mill annular and provided with a cover collecting container for the comminuted regrind, wherein the consisting of rotor, ring sieve and collecting container grinding unit is closed by a Mahlguteinlassö réelle having a housing cover.
  • a rotor mill with the aforementioned features is in the EP 0 727 254 B2 described.
  • the energy input required for the comminution process is of importance insofar as the corresponding comminution process should not introduce excessively energy into the millbase, since otherwise an undue heating of the ground material may occur.
  • the glass transition or the softening temperature of the plastic are exceeded, which would lead to a sticking or clogging of the ring sieve,
  • a crushing mill with a device housing for receiving an electric motor with motor shaft known.
  • a container with impact teeth and with a hub can be coupled to it by being plugged onto a motor shaft.
  • a container comprising a container bottom, a sieve ring, a collecting part and a container lid can be removed together with the cutting rotor from the device housing and can be placed thereon as a whole be easily decomposed in its components for cleaning purposes.
  • the collecting part can be coupled with the container bottom via bolts.
  • the invention is therefore based on the object to avoid excessive input of energy into the material to be ground by a corresponding design of the design of the rotor mill.
  • the invention provides in its basic idea that at least one of the grinding chamber of the rotor immediately enclosing and coming into direct contact with the material to be ground component of the grinding unit and / or the rotor mill, namely the ring screen and / or the collecting container and / or the cover, for the passage a cooling medium is set up.
  • the invention has the advantage that heating of the material to be ground via the cooling of components of the milling unit which come into direct contact with the material to be ground or the rotor mill is prevented or reduced or slowed down, so that the material to be ground remains in the rotor mill during whereabouts ultimately does not exceed a permissible millbase temperature.
  • the outer wall of the collecting container is double-walled. Due to the double-walled design of the riser container, it is possible either through the wall of the collecting container continuously or discontinuously pass a suitable liquid or gaseous cooling medium or discontinuously fill in the double-walled wall a suitable cooling medium such as dry ice or cold water or liquid nitrogen.
  • a suitable cooling medium such as dry ice or cold water or liquid nitrogen.
  • gaseous Cooling medium can be used, for example, the gas phase of a flowing out of a sump, initially filled in the liquid state into the sump nitrogen.
  • the cover of the collecting container is correspondingly double-walled, a cooling of the cover can be carried out in the same way.
  • the wall of the collecting container and / or cover cooling coils for the passage of a cooling medium.
  • the wall of the collecting container or the associated cover can be cooled.
  • the wall of the collecting container and / or its cover is provided with cooling fins, so that by a introduced into the interior of the rotor mill flow of a suitable gaseous cooling medium cooling of the corresponding components by the cooling fins respectively flowing cooling medium.
  • the gaseous cooling medium in turn, the gas phase of a flowing out of a reservoir for liquid nitrogen nitrogen can be used, but also in a suitable device pre-cooled air.
  • the space between the collecting container and the housing of the rotor mill can be flushed with pre-cooled air, so that a corresponding cooling effect is generated via the flow of the cooling fins,
  • the collecting container is divided by means of partitions into different sections, of which at least one section serves as a collecting area for the comminuted material to be ground and at least one further section is used for cooling the collecting container.
  • the measures described above for cooling the collecting container and / or cover on the concentrated for cooling the collecting container section or optionally sections be concentrated.
  • the cover of the collecting container is formed on its upper side facing the housing cover in the form of a dish with a depression arranged to receive a cooling medium.
  • a cooling medium for example, dry ice, cold water or even liquid nitrogen can be filled into such a depression.
  • the ring screen is formed at least in a partial structure double-walled.
  • annular sieve has an upper and a lower reinforcing ring and the stiffening rings are double-walled.
  • the annular sieve has an upper and lower reinforcing ring and also distributed over its circumference arranged, the upper and the lower reinforcing ring connecting, double-walled support webs are provided.
  • the corresponding double-walled components of the annular sieve can be flowed through by a suitable cooling medium continuously or discontinuously.
  • the ring screen is connected to the cover and forms a part of the cover.
  • a cooling of the grinding material subjected to the comminution process in the grinding chamber can additionally be carried out by cooling the bottom of the grinding chamber accordingly.
  • the labyrinth plate is provided with passing through cooling channels.
  • the labyrinth plate is provided with cooling fins arranged for an inflow by means of the gaseous cooling fluid.
  • a corresponding proposal for cooling a grinding chamber which in turn indirectly enclosing component is directed to the fact that the housing cover is in turn provided with a pressure disc acting on the cover of the collecting container and the pressure plate is provided in accordance with cooling channels passing through it.
  • the pressure disk is provided with arranged for an incoming flow by means of the gaseous cooling fluid cooling fins.
  • Also in this case can be used as a cooling gaseous fluid, the gas phase of a stored in a liquid state in a container nitrogen or pre-cooled air.
  • Rotor mill shown in its basic structure has a base body 10, to which a cup-shaped upper part 11 is attached as a housing via screws 12.
  • a motor part 13 which projects with an upstanding motor shaft 14 on the base body 10 and extent extends into the upper part 11.
  • the housing arrangement is completed by a housing cover 15 which engages over the upper part 11 and in which a funnel 16 connected to a material inlet 17 is arranged.
  • a rotor 18 On the motor shaft 14, a rotor 18 is attached via a sleeve-shaped projection in a fixed connection with it. Between the main body 10 and the rotor 18, a labyrinth plate 22 is arranged with corresponding labyrinth projections, on which the rotor 18 runs with correspondingly arranged labyrinth projections, so that a seal of the defined by the rotor 18 Mahlraums 25 is given to the motor part 13.
  • annular collecting container 26 can be used, which consists of an outer wall 27 and a set on the inner circumference ring screen 28, which ring sieve 28 when inserted into the housing 26 collecting container the rotor 18 and the grinding chamber 25 encloses.
  • the collecting container 26 is provided with its own upper cover 29, which is sealed by a peripheral seal 30 against the outer edge of the collecting container 26 and the rest of the collecting container 26 is closed as well as the grinding chamber 25 across the collecting container 26.
  • FIG. 1 is on the underside of the upper part cross-housing cover 15, a pressure plate 40 is arranged, which acts on the cover 29 of the collecting container 26 with the housing cover closed and thereby fixes the collecting container 26 in the housing.
  • the collecting container 26 When using the rotor mill, the collecting container 26 is inserted into the upper part 11 and the housing cover 15 is closed, wherein the housing cover 15 presses on the pressure plate 40 on the cover 29 of the collecting container 26 And this determines immovable, About the material inlet 17 and the hopper 16, the material to be crushed passes into the grinding chamber 25 and is here crushed by the rotating at high speed rotor 18. The comminuted material to be ground enters via the ring screen 28 in the annular space 32 of the collecting container 26. After completion of the crushing work, the housing cover 15 is opened and the container 29 closed by the cover 29 can be removed from the upper part 11.
  • collecting container 26 and / or cover 29 of the collecting container 26 may be double-walled in order to establish a flow with a suitable coolant. It is understood that in this case the double-walled regions of the collecting container 26 must be suitably connected to a coolant supply and coolant discharge. Additionally or alternatively, cooling coils through which a coolant flows can be arranged on the outside of the collecting container and / or cover.
  • the wall 27 and / or the cover 29 of the collecting container 26 may be provided with cooling fins, so that a cooling takes place by the flow of the cooling fins through a gaseous cooling fluid introduced into the housing of the rotor mill.
  • the cover 29 of the collecting container 26 is formed on its upper side shell-shaped with a recess into which a corresponding cooling medium may be filled, for example in the form of dry ice, cold water or liquid nitrogen.
  • the collecting container 26 is divided by means of partitions into different sections, of which at least one section serves as a collecting area for the comminuted material to be ground and at least one further section is used for cooling the collecting container.
  • annular sieve can be double-walled, at least in a partial structure.
  • the annular sieve having an upper and a lower stiffening ring and further distributed over its circumference arranged, extending therebetween support webs.
  • These parts of the ring sieve can in turn be double-walled, so that by means of flow through these double-walled regions or filling a cooling medium cooling of the ring sieve is made possible. Again, if necessary, care for appropriate connections for a cooling medium.
  • cover plate 29 of the collecting container 26 acting pressure plate 40 of the housing cover 15 either with cooling channels or turn to provide cooling by means arranged thereon and flowed by the gaseous cooling fluid cooling fins.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Crushing And Pulverization Processes (AREA)

Description

Die Erfindung betrifft eine Rotormühle für den Laborbetrieb mit einem an einen Antriebsmotor gekoppelten Rotor als Mahlwerkzeug, mit einem den Mahlraum des Rotors umschließenden Ringsieb und einem auf dem äußeren Umfang des Ringsiebes angeordneten, in das Gehäuse der Rotormühle einsetzbaren ringförmigen und mit einer Abdeckung versehenen Auffangbehälter für das zerkleinerte Mahlgut, wobei die aus Rotor, Ringsieb und Auffangbehälter bestehende Mahleinheit von einem eine Mahlguteinlassöffnung aufweisenden Gehäusedeckel verschließbar ist.The invention relates to a rotor mill for laboratory use with a rotor coupled to a drive motor as a grinding tool, arranged with a grinding chamber of the rotor ring sieve and arranged on the outer circumference of the ring sieve, insertable into the housing of the rotor mill annular and provided with a cover collecting container for the comminuted regrind, wherein the consisting of rotor, ring sieve and collecting container grinding unit is closed by a Mahlguteinlassöffnung having a housing cover.

Eine Rotormühle mit den vorgenannten Merkmalen ist in der EP 0 727 254 B2 beschrieben. In einer derartigen Rotormühle ist der für den Zerkleinerungsvorgang erforderliche Energieeintrag von Bedeutung insoweit, als der entsprechende Zerkleinerungsprozess nicht übermäßig Energie in das Mahlgut eintragen sollte, da es ansonsten zu einer unzulässigen Erwärmung des Mahlgutes kommen kann. So kann im Rahmen einer Erwärmung des Mahlgutes beispielsweise bei einer Zerkleinerung von Kunststoff die Glasübergangs- bzw. die Erweichungstemperatur des Kunststoffes überschritten werden, was zu einem Verkleben bzw. Zusetzen des Ringsiebes führen würde,A rotor mill with the aforementioned features is in the EP 0 727 254 B2 described. In such a rotor mill, the energy input required for the comminution process is of importance insofar as the corresponding comminution process should not introduce excessively energy into the millbase, since otherwise an undue heating of the ground material may occur. Thus, as part of a heating of the ground material, for example, in a comminution of plastic, the glass transition or the softening temperature of the plastic are exceeded, which would lead to a sticking or clogging of the ring sieve,

Im Stand der Technik ist zur Vermeidung eines derartigen Effektes bereits vorgeschlagen, zusammen mit dem Mahlgut ein entsprechendes Kühlmittel, beispielsweise in Form von Trockeneis oder flüssigem Stickstoff, in den Mahlraum einzubringen, so dass das insoweit mit dem Kühlmittel versetzte Mahlgut während des Zerkleinerungsprozesses die jeweils maximal zulässige Temperatur nicht erreicht. Eine derartige Vorgehensweise ist jedoch vergleichsweise umständlich und zum Teil auch gefährlich in der Durchführung. Weiterhin ist es bei durch Benutzung bekannten Mühlen realisiert, dass der Raum zwischen dem Auffangbehälter und dem Mühlengehäuse mit aus der Umgebung der Rotormühle angesaugter, raumwarmer Luft durchspült wird.In order to avoid such an effect, it has already been proposed in the prior art to introduce a corresponding coolant, for example in the form of dry ice or liquid nitrogen, into the grinding chamber, so that the grinding stock thus mixed with the coolant during the comminution process is the maximum permissible temperature not reached. However, such a procedure is relatively cumbersome and sometimes dangerous to carry out. Furthermore, it is realized in known by use of mills that the space between the collecting container and the mill housing is flushed with sucked from the environment of the rotor mill, space-warm air.

Aus dem Dokument DE 100 66 027 A1 ist bereits eine Zerkleinerungsmühle mit einem Gerätegehäuse zur Aufnahme eines Elektromotors mit Motorwelle bekannt. Ein Schneidrotor mit Schlagzähnen und mit einer Nabe ist durch Aufstecken auf eine Motorwelle mit dieser kuppelbar, Ein Behälter, umfassend einen Behälterboden, einen Siebring, ein Auffangteil und einen Behälterdeckel ist als Ganzes, zusammen mit dem Schneidrotor, vom Gerätegehäuse entnehmbar und darauf aufsetzbar und kann in seinen Komponenten zur Reinigungszwecken leicht zerlegt werden. Das Auffangteil ist über Riegel mit dem Behälterboden kuppelbar.From the document DE 100 66 027 A1 is already a crushing mill with a device housing for receiving an electric motor with motor shaft known. A container with impact teeth and with a hub can be coupled to it by being plugged onto a motor shaft. A container comprising a container bottom, a sieve ring, a collecting part and a container lid can be removed together with the cutting rotor from the device housing and can be placed thereon as a whole be easily decomposed in its components for cleaning purposes. The collecting part can be coupled with the container bottom via bolts.

Der Erfindung liegt daher die Aufgabe zugrunde, einen übermäßigen Energieeintrag in das Mahlgut durch eine entsprechende Ausgestaltung der Bauform der Rotormühle zu vermeiden.The invention is therefore based on the object to avoid excessive input of energy into the material to be ground by a corresponding design of the design of the rotor mill.

Die Lösung dieser Aufgabe ergibt sich einschließlich vorteilhafter Ausgestaltungen und Weiterbildungen der Erfindung aus dem Inhalt der Patentansprüche, welche dieser Beschreibung nachgestellt sind.The solution to this problem arises, including advantageous refinements and developments of the invention from the content of the claims, which are adjusted to this description.

Die Erfindung sieht in ihrem Grundgedanken vor, dass wenigstens ein den Mahlraum des Rotors unmittelbar umschließendes und mit dem Mahlgut direkt in Kontakt kommendes Bauteil der Mahleinheit und/oder der Rotormühle, nämlich das Ringsieb und/oder der Auffangbehälter und/oder die Abdeckung, zur Durchleitung eines Kühlmediums eingerichtet ist. Mit der Erfindung ist der Vorteil verbunden, dass eine Erwärmung des Mahlgutes über die Kühlung von mit dem Mahlgut direkt in Kontakt kommenden Bauteilen der Mahleinheit bzw, der Rotormühle verhindert bzw. reduziert bzw. verlangsamt wird, so dass das Mahlgut während des Verbleibs in der Rotormühle eine zulässige Mahlguttemperatur letztlich nicht überschreitet.The invention provides in its basic idea that at least one of the grinding chamber of the rotor immediately enclosing and coming into direct contact with the material to be ground component of the grinding unit and / or the rotor mill, namely the ring screen and / or the collecting container and / or the cover, for the passage a cooling medium is set up. The invention has the advantage that heating of the material to be ground via the cooling of components of the milling unit which come into direct contact with the material to be ground or the rotor mill is prevented or reduced or slowed down, so that the material to be ground remains in the rotor mill during whereabouts ultimately does not exceed a permissible millbase temperature.

Nach einem ersten Ausführungsbeispiel der Erfindung kann vorgesehen sein, dass die äußere Wandung des Auffangbehälters doppelwandig ausgebildet ist. Aufgrund der doppelwandigen Ausführung des Aufgangbehälters ist es möglich, entweder durch die Wandung des Auffangbehälters kontinuierlich oder auch diskontinuierlich ein geeignetes flüssiges oder gasförmiges Kühlmedium hindurchzuleiten oder aber in der doppelwandigen Wandung diskontinuierlich ein geeignetes Kühlmedium wie etwa Trockeneis oder kaltes Wasser oder Flüssigstickstoff einzufüllen. Als gasförmiges Kühlmedium kann beispielsweise die Gasphase eines aus einem Sammelbehälter ausströmenden, zunächst in flüssigem Zustand in den Sammelbehälter eingefüllten Stickstoffs verwendet werden.According to a first embodiment of the invention can be provided that the outer wall of the collecting container is double-walled. Due to the double-walled design of the riser container, it is possible either through the wall of the collecting container continuously or discontinuously pass a suitable liquid or gaseous cooling medium or discontinuously fill in the double-walled wall a suitable cooling medium such as dry ice or cold water or liquid nitrogen. As gaseous Cooling medium can be used, for example, the gas phase of a flowing out of a sump, initially filled in the liquid state into the sump nitrogen.

Soweit nach einem alternativen Ausführungsbeispiel vorgesehen ist, dass die Abdeckung des Auffangbehälters entsprechend doppelwandig ausgebildet ist, kann eine Kühlung der Abdeckung in gleicher Weise vorgenommen werden.As far as according to an alternative embodiment it is provided that the cover of the collecting container is correspondingly double-walled, a cooling of the cover can be carried out in the same way.

Nach einem Ausführungsbeispiel der Erfindung kann vorgesehen sein, dass auf der äußeren Oberfläche von Auffangbehälter und/oder Abdeckung Kühlschlangen zur Durchleitung eines Kühlmediums angebracht sind. Auch auf diese Weise können die Wandung des Auffangbehälters bzw. der zugehörigen Abdeckung gekühlt werden. Zusätzlich kann vorgesehen sein, dass die Wandung des Auffangbehälters und/oder seine Abdeckung mit Kühlrippen versehen ist, so dass durch eine in das Innere der Rotormühle eingeleitete Strömung von einem geeigneten gasförmigen Kühlmedium eine Kühlung der entsprechenden Bauteile durch das die Kühlrippen jeweils anströmende Kühlmedium erfolgt. Als gasförmiges Kühlmedium kann wiederum die Gasphase eines aus einem Sammelbehälter für flüssigen Stickstoff ausströmenden Stickstoffs eingesetzt werden, ebenso jedoch auch in einer geeigneten Vorrichtung vorgekühlte Luft. Insbesondere kann beispielsweise der Raum zwischen dem Auffangbehälter und dem Gehäuse der Rotormühle mit vorgekühlter Luft durchspült sein, so dass über die Anströmung der Kühlrippen eine entsprechende Kühlwirkung erzeugt wird,According to one embodiment of the invention can be provided that are mounted on the outer surface of the collecting container and / or cover cooling coils for the passage of a cooling medium. In this way, the wall of the collecting container or the associated cover can be cooled. In addition, it may be provided that the wall of the collecting container and / or its cover is provided with cooling fins, so that by a introduced into the interior of the rotor mill flow of a suitable gaseous cooling medium cooling of the corresponding components by the cooling fins respectively flowing cooling medium. As the gaseous cooling medium, in turn, the gas phase of a flowing out of a reservoir for liquid nitrogen nitrogen can be used, but also in a suitable device pre-cooled air. In particular, for example, the space between the collecting container and the housing of the rotor mill can be flushed with pre-cooled air, so that a corresponding cooling effect is generated via the flow of the cooling fins,

Alternativ oder auch zusätzlich zu den vorbeschriebenen Maßnahmen kann vorgesehen sein, dass der Auffangbehälter mittels Trennwänden in unterschiedliche Sektionen unterteilt ist, von denen wenigstens eine Sektion als Auffangbereich für das zerkleinerte Mahlgut dient und wenigstens eine weitere Sektion zur Kühlung des Auffangbehälters herangezogen ist. Hierbei können die vorstehend beschriebenen Maßnahmen zur Kühlung von Auffangbehälter und/oder Abdeckung auf die zur Kühlung des Auffangbehälters heranzuziehende Sektion bzw. gegebenenfalls Sektionen konzentriert sein.Alternatively or in addition to the above-described measures can be provided that the collecting container is divided by means of partitions into different sections, of which at least one section serves as a collecting area for the comminuted material to be ground and at least one further section is used for cooling the collecting container. Here, the measures described above for cooling the collecting container and / or cover on the concentrated for cooling the collecting container section or optionally sections be concentrated.

Im Hinblick auf eine Kühlung der Abdeckung des Auffangbehälters kann vorgesehen sein, dass die Abdeckung des Auffangbehälters auf ihrer dem Gehäusedeckel zugewandten Oberseite schalenförmig mit einer zur Aufnahme eines Kühlmediums eingerichteten Vertiefung ausgebildet ist. Zum Beispiel können in eine derartige Vertiefung Trockeneis, kaltes Wasser oder auch Flüssigstickstoff eingefüllt sein.With regard to a cooling of the cover of the collecting container, it may be provided that the cover of the collecting container is formed on its upper side facing the housing cover in the form of a dish with a depression arranged to receive a cooling medium. For example, dry ice, cold water or even liquid nitrogen can be filled into such a depression.

Alternativ oder auch zusätzlich zur Kühlung des Auffangbehälters bzw. dessen Abdeckung kann nach einem Ausführungsbeispiel der Erfindung vorgesehen sein, dass das Ringsieb zumindest in einer Teilstruktur doppelwandig ausgebildet ist. Mit einer dadurch wiederum möglichen Kühlung des Ringsiebes wird ein Bauteil zur Kühlung herangezogen, das während des Mahlprozesses unmittelbar mit dem Mahlgut in Verbindung kommt, so dass die Kühlwirkung entsprechend groß ist.Alternatively or in addition to the cooling of the collecting container or its cover can be provided according to an embodiment of the invention that the ring screen is formed at least in a partial structure double-walled. With this in turn possible cooling of the ring sieve a component is used for cooling, which comes directly during the grinding process with the ground material in combination, so that the cooling effect is correspondingly large.

Im Einzelnen kann hierzu beispielsweise vorgesehen sein, dass das Ringsieb einen oberen und einen unteren Versteifungsring aufweist und die Versteifungsringe doppelwandig ausgebildet sind.In detail, this may be provided, for example, that the annular sieve has an upper and a lower reinforcing ring and the stiffening rings are double-walled.

Alternativ kann vorgesehen sein, dass das Ringsieb einen oberen und unteren Versteifungsring aufweist und ferner über seinen Umfang verteilt angeordnete, den oberen und den unteren Versteifungsring verbindende, doppelwandig ausgebildete Stützstege vorgesehen sind.Alternatively it can be provided that the annular sieve has an upper and lower reinforcing ring and also distributed over its circumference arranged, the upper and the lower reinforcing ring connecting, double-walled support webs are provided.

So können in beiden Ausführungsformen die entsprechend doppelwandig ausgebildeten Bestandteile des Ringsiebes von einem geeigneten Kühlmedium kontinuierlich oder diskontinuierlich durchströmt sein.Thus, in both embodiments, the corresponding double-walled components of the annular sieve can be flowed through by a suitable cooling medium continuously or discontinuously.

Zur Verbesserung der Kühlung des Ringsiebes kann nach einem Ausführungsbeispiel der Erfindung vorgesehen sein, dass das Ringsieb mit der Abdeckung verbunden ist und einen Bestandteil der Abdeckung bildet.To improve the cooling of the ring sieve can be provided according to an embodiment of the invention that the ring screen is connected to the cover and forms a part of the cover.

Wiederum zusätzlich kann auch eine Kühlung des im Mahlraum dem Zerkleinerungsprozess unterworfenen Mahlgutes dadurch vorgenommen werden, dass der Boden des Mahlraumes entsprechend gekühlt ist. Soweit hierzu die in der gattungsbildenden EP 0 727 254 B2 beschriebene Rotormühle eine als Labyrinthplatte ausgebildete Bodenplatte aufweist, kann vorgesehen sein, dass die Labyrinthplatte mit sie durchsetzenden Kühlkanälen versehen ist. In Entsprechung zu dem bezüglich des Auffangbehälters bzw. dessen Abdeckung unterbreiteten Vorschlag kann alternativ bzw. zusätzlich vorgesehen sein, dass die Labyrinthplatte mit für eine Anströmung mittels des gasförmigen kühlenden Fluids eingerichteten Kühlrippen versehen ist.In addition, a cooling of the grinding material subjected to the comminution process in the grinding chamber can additionally be carried out by cooling the bottom of the grinding chamber accordingly. As far as this in the generic EP 0 727 254 B2 described rotor mill having a bottom plate designed as a labyrinth plate, it can be provided that the labyrinth plate is provided with passing through cooling channels. Corresponding to the suggestion made with regard to the collecting container or its cover, it may alternatively or additionally be provided that the labyrinth plate is provided with cooling fins arranged for an inflow by means of the gaseous cooling fluid.

Ein entsprechender Vorschlag zur Kühlung eines den Mahlraum wiederum mittelbar umschließenden Bauteils ist darauf gerichtet, dass der Gehäusedeckel seinerseits mit einer die Abdeckung des Auffangbehälters beaufschlagenden Druckscheibe versehen ist und die Druckscheibe entsprechend mit sie durchsetzenden Kühlkanälen versehen ist. Alternativ dazu kann wiederum hinsichtlich einer Kühlung der Druckscheibe vorgesehen sein, dass die Druckscheibe mit für eine Anströmung mittels des gasförmigen kühlenden Fluids eingerichteten Kühlrippen versehen ist.A corresponding proposal for cooling a grinding chamber which in turn indirectly enclosing component is directed to the fact that the housing cover is in turn provided with a pressure disc acting on the cover of the collecting container and the pressure plate is provided in accordance with cooling channels passing through it. Alternatively, it can again be provided with regard to a cooling of the pressure disk that the pressure disk is provided with arranged for an incoming flow by means of the gaseous cooling fluid cooling fins.

Auch in diesem Fall kann als kühlendes gasförmiges Fluid die Gasphase eines in flüssigem Zustand in einem Behälter bevorrateten Stickstoffs oder auch vorgekühlte Luft verwendet werden.Also in this case can be used as a cooling gaseous fluid, the gas phase of a stored in a liquid state in a container nitrogen or pre-cooled air.

Zur Verdeutlichung des Aufbaus einer für die Verwirklichung der Erfindung einsetzbaren Rotormühle wird auf die beigefügte Zeichnung Bezug genommen, in der

  • Fig. 1 den Funktionsteil einer Rotormühle im Schnitt,
  • Fig. 2 einen Auffangbehälter mit Ringsieb in einer Einzeldarstellung zeigt.
To clarify the structure of a usable for the realization of the invention rotor mill reference is made to the accompanying drawings, in which
  • Fig. 1 the functional part of a rotor mill in section,
  • Fig. 2 a collecting container with ring sieve in a single view shows.

Die in Figur 1 in ihrem Grundaufbau dargestellte Rotormühle weist einen Grundkörper 10 auf, an welchen ein topfförmiges Oberteil 11 als Gehäuse über Schrauben 12 befestigt ist. In dem Grundkörper 10 sitzt ein Motorteil 13, welches mit einer aufstehenden Motorwelle 14 über den Grundkörper 10 vorsteht und insoweit in das Oberteil 11 hineinreicht. Die Gehäuseanordnung wird durch einen das Oberteil 11 übergreifenden Gehäusedeckel 15 vervollständigt, in welcher ein an einen Materialeinlauf 17 angeschlossener Trichter 16 angeordnet ist.In the FIG. 1 Rotor mill shown in its basic structure has a base body 10, to which a cup-shaped upper part 11 is attached as a housing via screws 12. In the base body 10 sits a motor part 13, which projects with an upstanding motor shaft 14 on the base body 10 and extent extends into the upper part 11. The housing arrangement is completed by a housing cover 15 which engages over the upper part 11 and in which a funnel 16 connected to a material inlet 17 is arranged.

Auf die Motorwelle 14 ist ein Rotor 18 über einen hülsenförmigen Ansatz in einer festen Verbindung damit aufgesteckt. Zwischen dem Grundkörper 10 und dem Rotor 18 ist eine Labyrinthplatte 22 mit entsprechenden Labyrinthvorsprüngen angeordnet, auf welcher der Rotor 18 mit entsprechend angeordneten Labyrinthvorsprüngen läuft, so dass eine Abdichtung des durch den Rotor 18 definierten Mahlraums 25 gegen das Motorteil 13 gegeben ist.On the motor shaft 14, a rotor 18 is attached via a sleeve-shaped projection in a fixed connection with it. Between the main body 10 and the rotor 18, a labyrinth plate 22 is arranged with corresponding labyrinth projections, on which the rotor 18 runs with correspondingly arranged labyrinth projections, so that a seal of the defined by the rotor 18 Mahlraums 25 is given to the motor part 13.

Wie sich aus einer Zusammenschau der Figuren 1 und 2 ergibt, ist in das Oberteil 11 ein ringförmiger Auffangbehälter 26 einsetzbar, welcher aus einer äußeren Wandung 27 und einem am Innenumfang festgelegten Ringsieb 28 besteht, welches Ringsieb 28 bei in das Gehäuse eingesetztem Auffangbehälter 26 den Rotor 18 bzw. den Mahlraum 25 umschließt. Der Auffangbehälter 26 ist mit einer eigenen oberen Abdeckung 29 versehen, die über eine umlaufende Dichtung 30 gegen den äußeren Rand des Auffangbehälters 26 abgedichtet und im Übrigen den Auffangbehälter 26 verschließend wie auch den Mahlraum 25 übergreifend an dem Auffangbehälter 26 festgelegt ist.As can be seen from a synopsis of FIGS. 1 and 2 shows, in the upper part 11, an annular collecting container 26 can be used, which consists of an outer wall 27 and a set on the inner circumference ring screen 28, which ring sieve 28 when inserted into the housing 26 collecting container the rotor 18 and the grinding chamber 25 encloses. The collecting container 26 is provided with its own upper cover 29, which is sealed by a peripheral seal 30 against the outer edge of the collecting container 26 and the rest of the collecting container 26 is closed as well as the grinding chamber 25 across the collecting container 26.

Entsprechend Figur 1 ist an der Unterseite des das Oberteil übergreifenden Gehäusedeckels 15 eine Druckscheibe 40 angeordnet, die bei geschlossenem Gehäusedeckel die Abdeckung 29 des Auffangbehälters 26 beaufschlagt und dadurch den Auffangbehälter 26 in dem Gehäuse fixiert.Corresponding FIG. 1 is on the underside of the upper part cross-housing cover 15, a pressure plate 40 is arranged, which acts on the cover 29 of the collecting container 26 with the housing cover closed and thereby fixes the collecting container 26 in the housing.

Bei Gebrauch der Rotormühle ist der Auffangbehälter 26 in das Oberteil 11 eingesetzt und der Gehäusedeckel 15 geschlossen, wobei der Gehäusedeckel 15 über die Druckscheibe 40 auf die Abdeckung 29 des Auffangbehälters 26 drückt und diese dadurch unverrückbar festlegt, Über den Materialeinlauf 17 und den Trichter 16 gelangt das zu zerkleinernde Materialgut in den Mahlraum 25 und wird hier durch den mit hoher Drehgeschwindigkeit umlaufenden Rotor 18 zerkleinert. Das zerkleinerte Mahlgut tritt über das Ringsieb 28 in den Ringraum 32 des Auffangbehälters 26 ein. Nach Abschluss der Zerkleinerungsarbeit wird der Gehäusedeckel 15 geöffnet und der durch die Abdeckung 29 verschlossene Auffangbehälter 26 kann aus dem Oberteil 11 entnommen werden.When using the rotor mill, the collecting container 26 is inserted into the upper part 11 and the housing cover 15 is closed, wherein the housing cover 15 presses on the pressure plate 40 on the cover 29 of the collecting container 26 And this determines immovable, About the material inlet 17 and the hopper 16, the material to be crushed passes into the grinding chamber 25 and is here crushed by the rotating at high speed rotor 18. The comminuted material to be ground enters via the ring screen 28 in the annular space 32 of the collecting container 26. After completion of the crushing work, the housing cover 15 is opened and the container 29 closed by the cover 29 can be removed from the upper part 11.

Soweit eine derartige Rotormühle zur Kühlung von ihren Mahlraum 25 unmittelbar oder mittelbar umschließenden Bauteilen eingerichtet sein soll, sind die verschiedenen Möglichkeiten dafür in der Zeichnung nicht im Einzelnen dargestellt, da sie sich unmittelbar bereits aus der vorstehenden Beschreibungseinleitung ergeben.As far as such a rotor mill for cooling of their grinding chamber 25 is to be set up directly or indirectly enclosing components, the various possibilities for it are not shown in detail in the drawing, since they arise directly from the above description introduction.

So können Auffangbehälter 26 und/oder Abdeckung 29 des Auffangbehälters 26 doppelwandig ausgebildet sein, um eine Durchströmung mit einem geeigneten Kühlmittel einzurichten. Es versteht sich, dass in diesem Fall die doppelwandigen Bereiche des Auffangbehälters 26 in geeigneter Weise an eine Kühlmittelzufuhr und Kühlmittelabfuhr angeschlossen sein müssen. Zusätzlich oder alternativ können auf der Außenseite von Auffangbehälter und/oder Abdeckung entsprechend von einem Kühlmittel durchströmte Kühlschlangen angeordnet sein. Zusätzlich kann auch die Wandung 27 und/oder die Abdeckung 29 des Auffangbehälters 26 mit Kühlrippen versehen sein, so dass durch die Anströmung der Kühlrippen durch ein in das Gehäuse der Rotormühle eingeleitetes gasförmiges kühlendes Fluid eine entsprechende Kühlung erfolgt.Thus, collecting container 26 and / or cover 29 of the collecting container 26 may be double-walled in order to establish a flow with a suitable coolant. It is understood that in this case the double-walled regions of the collecting container 26 must be suitably connected to a coolant supply and coolant discharge. Additionally or alternatively, cooling coils through which a coolant flows can be arranged on the outside of the collecting container and / or cover. In addition, the wall 27 and / or the cover 29 of the collecting container 26 may be provided with cooling fins, so that a cooling takes place by the flow of the cooling fins through a gaseous cooling fluid introduced into the housing of the rotor mill.

Wiederum kann vorgesehen sein, dass die Abdeckung 29 des Auffangbehälters 26 auf ihre Oberseite schalenförmig mit einer Vertiefung ausgebildet ist, in welche eine entsprechendes Kühlmedium beispielsweise in Form von Trockeneis, kaltem Wasser oder Flüssigstickstoff eingefüllt sein kann.Again, it may be provided that the cover 29 of the collecting container 26 is formed on its upper side shell-shaped with a recess into which a corresponding cooling medium may be filled, for example in the form of dry ice, cold water or liquid nitrogen.

Eine Möglichkeit zur Kühlung des Auffangbehälters besteht auch darin, dass der Auffangbehälter 26 mittels Trennwänden in unterschiedliche Sektionen unterteilt ist, von denen wenigstens eine Sektion als Auffangbereich für das zerkleinerte Mahlgut dient und wenigstens eine weitere Sektion zur Kühlung des Auffangbehälters herangezogen ist.One possibility for cooling the collecting container is also that the collecting container 26 is divided by means of partitions into different sections, of which at least one section serves as a collecting area for the comminuted material to be ground and at least one further section is used for cooling the collecting container.

Eine weitere Möglichkeit besteht darin, das den Mahlraum 25 umschließende Ringsieb 28 zu kühlen, wozu das Ringsieb zumindest in einer Teilstruktur doppelwandig ausgebildet sein kann. Beispielsweise kann, wie in der Zeichnung nicht weiter dargestellt, das Ringsieb einen oberen und einen unteren Versteifungsring und ferner über seinen Umfang verteilt angeordnete, dazwischen verlaufende Stützstege aufweisen. Diese Teile des Ringsiebes können wiederum doppelwandig ausgebildet sein, so dass mittels Durchströmung dieser doppelwandigen Bereiche oder Einfüllen eines Kühlmediums eine Kühlung des Ringsiebes ermöglicht ist. Auch hier ist gegebenenfalls für entsprechende Anschlüsse für ein Kühlmedium Sorge zu tragen.Another possibility is to cool the annular space 28 enclosing the grinding chamber 25, for which purpose the annular sieve can be double-walled, at least in a partial structure. For example, as not further illustrated in the drawing, the annular sieve having an upper and a lower stiffening ring and further distributed over its circumference arranged, extending therebetween support webs. These parts of the ring sieve can in turn be double-walled, so that by means of flow through these double-walled regions or filling a cooling medium cooling of the ring sieve is made possible. Again, if necessary, care for appropriate connections for a cooling medium.

Wiederum zusätzlich oder alternativ kann vorgesehen sein, eine Kühlung des Mahlraums 25 dadurch vorzunehmen, dass die Labyrinthplatte 22 mit sie durchsetzenden Kühlkanälen versehen ist oder alternativ oder zusätzlich auch Kühlrippen aufweist, um eine Kühlung durch Anströmung durch ein in das Gehäuse eingeleitetes gasförmiges kühlendes Fluid zu verwirklichen,In addition or alternatively, provision may be made for cooling the grinding chamber 25 by providing the labyrinth plate 22 with cooling channels passing through it or alternatively or additionally also having cooling ribs in order to realize cooling by flow through a gaseous cooling fluid introduced into the housing .

Schließlich kann auch vorgesehen sein, eine die Abdeckung 29 des Auffangbehälters 26 beaufschlagende Druckscheibe 40 des Gehäusedeckels 15 entweder mit Kühlkanälen zu versehen oder wiederum für eine Kühlung mittels daran angeordneter und von dem gasförmigen kühlenden Fluid angeströmter Kühlrippen zu sorgen. Finally, it can also be provided to provide a cover plate 29 of the collecting container 26 acting pressure plate 40 of the housing cover 15 either with cooling channels or turn to provide cooling by means arranged thereon and flowed by the gaseous cooling fluid cooling fins.

Claims (15)

  1. A rotary mill for laboratory operation having a rotor coupled to a drive motor as a milling tool, with a ring sieve (28) surrounding the milling chamber (25) of the rotor (18) and a ring-shaped collecting container (26) for the comminuted milled material being arranged on the outer circumference of the ring sieve (28) which collecting container is insertable into the housing of the rotary mill and is provided with a cover (29), wherein the milling unit composed of the rotor (18), ring sieve (28) and collecting container (26) is closable by a housing cover (15) having an inlet port (17) for milled material, characterized in that at least one structural component of the milling unit directly enclosing the milling chamber (25) of the rotor (18) and coming into direct contact with the milling material and/or the rotary mill, specifically the ring sieve (28) and/or the collecting container (26) and/or the cover (29), is equipped for the through-passage of a cooling medium.
  2. The rotary mill according to claim 1, characterized in that the outer wall (27) is of the collecting container (26) is formed to be double-walled.
  3. The rotary mill according to claim 1 or claim 2, characterized in that the cover (29) of the collecting container (26) is formed to be double-walled.
  4. The rotary mill according to one of claims 1 through 3, characterized in that cooling coils for the through-passage of a cooling medium are mounted on the outer surface of the collecting container (26) and/or the cover (29).
  5. The rotary mill according to one of claims 1 through 4, characterized in that the wall (27) and/or the cover (29) of the collecting container (26) is provided with cooling fins equipped for an inflow by means of the gaseous cooling fluid.
  6. The rotary mill according to one of claims 1 through 5, characterized in that the collecting container (26) is divided into different sections by means of dividing walls, of which at least one section serves as a collection area for the comminuted milled material and at least one further section is used for the cooling of the collecting container.
  7. The rotary mill according to one of claims 1 through 6, characterized in that the cover (29) of the collecting container (26) is formed to be dish-shaped on the upper side thereof facing the housing cover (15) with a trough equipped for the uptake of a cooling medium.
  8. The rotary mill according to one of claims 1 through 7, characterized in that the ring sieve (28) is formed to be double-walled at least in a part of the structure.
  9. The rotary mill according to claim 8, characterized in that the ring sieve (28) has an upper and a lower stiffening ring and the stiffening rings are formed to be double-walled.
  10. The rotary mill according to claim 8 or claim 9, characterized in that the ring sieve (28) has an upper and a lower stiffening ring and further is provided with supporting bars connected to the upper and a lower stiffening rings that are formed to be double-walled and are arranged in distribution over the circumference of the ring sieve.
  11. The rotary mill according to one of claims 1 through 10, characterized in that the ring sieve (28) is connected with the cover (29) and forms a component of the cover (29).
  12. The rotary mill according to one of claims 1 through 11 with a base plate formed as a labyrinth plate (22) supporting the rotor (18), characterized in that the labyrinth plate (22) is provided with cooling channels penetrating therethrough.
  13. The rotary mill according to one of claims 1 through 12 with a base plate formed as a labyrinth plate (22) supporting the rotor (18), characterized in that the labyrinth plate (22) is provided with cooling fins equipped for an inflow by means of the gaseous cooling fluid.
  14. The rotary mill according to one of claims 1 through 13, characterized in that the housing cover (15) has a pressure disc (40) bearing against the cover (29) of the collecting container (26) and the pressure disc (40) is provided with cooling channels penetrating therethrough.
  15. The rotary mill according to one of claims 1 through 14, characterized in that the housing cover (15) has a pressure disc (40) bearing against the cover (29) of the collecting container (26) and the pressure disc (40) is provided with cooling fins equipped for an inflow by means of the gaseous cooling fluid.
EP13734354.7A 2012-06-14 2013-06-14 Rotor mill with direct or indirect cooling of the milling space Active EP2861351B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012105166 2012-06-14
PCT/EP2013/062380 WO2013186362A1 (en) 2012-06-14 2013-06-14 Rotor mill having direct or indirect cooling of the milling chamber of the rotor mill

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EP2861351A1 EP2861351A1 (en) 2015-04-22
EP2861351B1 true EP2861351B1 (en) 2018-10-10

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US (1) US20150136883A1 (en)
EP (1) EP2861351B1 (en)
JP (2) JP2015519197A (en)
CN (1) CN104520007B (en)
DE (1) DE202013012350U1 (en)
IN (1) IN2014DN10529A (en)
RU (1) RU2608018C9 (en)
WO (1) WO2013186362A1 (en)

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JP2019057346A (en) 2017-09-20 2019-04-11 東芝メモリ株式会社 Memory system

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Publication number Publication date
WO2013186362A1 (en) 2013-12-19
EP2861351A1 (en) 2015-04-22
RU2608018C2 (en) 2017-01-11
IN2014DN10529A (en) 2015-08-21
CN104520007B (en) 2017-03-15
RU2608018C9 (en) 2017-06-13
RU2014149574A (en) 2016-08-10
JP6538757B2 (en) 2019-07-03
JP2015519197A (en) 2015-07-09
DE202013012350U1 (en) 2016-06-06
CN104520007A (en) 2015-04-15
JP2017144436A (en) 2017-08-24
US20150136883A1 (en) 2015-05-21

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