EP2861351B1 - Moulin à rotor avec refroidissement direct ou indirect de l'enceinte de broyage - Google Patents

Moulin à rotor avec refroidissement direct ou indirect de l'enceinte de broyage 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
Authority
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)
English (en)
Other versions
EP2861351A1 (fr
Inventor
Matthias Niewind
Frank Janetta
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.)
Retsch GmbH
Original Assignee
Retsch GmbH
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 Retsch GmbH filed Critical Retsch GmbH
Publication of EP2861351A1 publication Critical patent/EP2861351A1/fr
Application granted granted Critical
Publication of EP2861351B1 publication Critical patent/EP2861351B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00Disintegrating by mills having rotary beater elements ; Hammer mills
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/062Disintegrating 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/16Details
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00Auxiliary 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
    • B02C23/08Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/10Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00Auxiliary 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
    • B02C23/18Adding fluid, other than for crushing or disintegrating by fluid energy
    • B02C23/24Passing gas through crushing or disintegrating zone
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C25/00Control 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.

Landscapes

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

Claims (15)

  1. Moulin à rotor pour le travail en laboratoire avec un rotor accouplé à un moteur d'entraînement en guise d'outil de broyage, avec un tamis annulaire (28) entourant l'espace de broyage (25) du rotor (18) et un récipient collecteur (26) disposé sur la périphérie externe du tamis annulaire (28), pouvant être inséré dans le boîtier du moulin à rotor, de forme annulaire et doté d'un capot (29) pour le produit broyé concassé, dans lequel l'unité de broyage constituée du rotor (18), du tamis annulaire (28) et du récipient collecteur (26) peut être fermée par un couvercle de boîtier (15) présentant une ouverture d'entrée de produit broyé (17), caractérisé en ce qu'au moins un composant entourant indirectement l'espace de broyage (25) du rotor (18) et venant en contact direct avec le produit broyé de l'unité de broyage et/ou du moulin à rotor, à savoir le tamis annulaire (28) et/ou le récipient collecteur (26) et/ou le capot (29), est conçu pour le passage d'un fluide de refroidissement.
  2. Moulin à rotor selon la revendication 1, caractérisé en ce que la paroi externe (27) du récipient collecteur (26) est conçue par une double paroi.
  3. Moulin à rotor selon la revendication 1, caractérisé en ce que le capot (29) du récipient collecteur (26) est conçu par une double paroi.
  4. Moulin à rotor selon une des revendications 1 à 3, caractérisé en ce que, sur la surface externe du récipient collecteur (26) et/ou du capot (29), des serpentins de réfrigération sont appliqués pour le passage d'un fluide de refroidissement.
  5. Moulin à rotor selon une des revendications 1 à 4, caractérisé en ce que la paroi (27) et/ou le capot (29) du récipient collecteur (26) est doté d'ailettes de refroidissement ménagées pour un écoulement au moyen du fluide refroidissant sous forme gazeuse.
  6. Moulin à rotor selon une des revendications 1 à 5, caractérisé en ce que le récipient collecteur (26) est divisé en sections différentes au moyen de cloisons de séparation, dont au moins une section sert de zone de collecte pour le produit broyé concassé et au moins une autre section est utilisée pour le refroidissement du récipient collecteur.
  7. Moulin à rotor selon une des revendications 1 à 6, caractérisé en ce que le capot (29) du récipient collecteur (26) est conçu sur leur côté supérieur tourné vers le couvercle de boîtier (15) en forme de cuvette avec un renfoncement destiné à recevoir un fluide de refroidissement.
  8. Moulin à rotor selon une des revendications 1 à 7, caractérisé en ce que le tamis annulaire (28) est conçu à double paroi au moins dans une structure partielle.
  9. Moulin à rotor selon la revendication 8, caractérisé en ce que le tamis annulaire (28) présente une bague de renforcement supérieure et une inférieure et les bagues de renforcement sont conçues à double paroi.
  10. Moulin à rotor selon la revendication 8 ou 9, caractérisé en ce que le tamis annulaire (28) présente une bague de renforcement supérieure et une inférieure et, en outre, disposées de manière répartie sur sa périphérie, des branches d'appui conçues à double paroi et reliant les bagues de renforcement supérieure et inférieure sont prévues.
  11. Moulin à rotor selon une des revendications 1 à 10, caractérisé en ce que le tamis annulaire (28) est relié avec le capot (29) et forme un élément constitutif du capot (29).
  12. Moulin à rotor selon une des revendications 1 à 11 avec une plaque de fond conçue comme une plaque de labyrinthe (22) portant le rotor (18), caractérisé en ce que la plaque de labyrinthe (22) est dotée de canaux de refroidissement qui la traversent.
  13. Moulin à rotor selon une des revendications 1 à 12 avec une plaque de fond conçue comme une plaque de labyrinthe (22) portant le rotor (18), caractérisé en ce que la plaque de labyrinthe (22) est dotée d'ailettes de refroidissement destinées à un écoulement au moyen du fluide refroidissant sous forme gazeuse.
  14. Moulin à rotor selon une des revendications 1 à 13, caractérisé en ce que le couvercle de boîtier (15) présente un disque de pression (40) sollicitant le capot (29) du récipient collecteur (26) et le disque de pression (40) est doté de canaux de refroidissement qui le traversent.
  15. Moulin à rotor selon une des revendications 1 à 14, caractérisé en ce que le couvercle de boîtier (15) présente un disque de pression (40) sollicitant le capot (29) du récipient collecteur (26) et le disque de pression (40) est doté d'ailettes de refroidissement destinées à un écoulement au moyen du fluide refroidissant sous forme gazeuse.
EP13734354.7A 2012-06-14 2013-06-14 Moulin à rotor avec refroidissement direct ou indirect de l'enceinte de broyage Active EP2861351B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012105166 2012-06-14
PCT/EP2013/062380 WO2013186362A1 (fr) 2012-06-14 2013-06-14 Broyeur à couteaux dont la chambre de broyage est refroidie de manière direct ou indirecte

Publications (2)

Publication Number Publication Date
EP2861351A1 EP2861351A1 (fr) 2015-04-22
EP2861351B1 true EP2861351B1 (fr) 2018-10-10

Family

ID=48747523

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13734354.7A Active EP2861351B1 (fr) 2012-06-14 2013-06-14 Moulin à rotor avec refroidissement direct ou indirect de l'enceinte de broyage

Country Status (8)

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

Families Citing this family (3)

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Publication number Priority date Publication date Assignee Title
DE102015005642A1 (de) * 2015-05-05 2016-11-10 B. Maier Zerkleinerungstechnik Gmbh Messerringzerspaner
DE102015109337A1 (de) * 2015-06-11 2016-12-15 Fritsch Gmbh Messermühle
JP2019057346A (ja) 2017-09-20 2019-04-11 東芝メモリ株式会社 メモリシステム

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Also Published As

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

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