WO2015028151A1 - Broyeur vibrant à disques et procédé pour faire fonctionner un broyeur vibrant à disques - Google Patents

Broyeur vibrant à disques et procédé pour faire fonctionner un broyeur vibrant à disques Download PDF

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Publication number
WO2015028151A1
WO2015028151A1 PCT/EP2014/002341 EP2014002341W WO2015028151A1 WO 2015028151 A1 WO2015028151 A1 WO 2015028151A1 EP 2014002341 W EP2014002341 W EP 2014002341W WO 2015028151 A1 WO2015028151 A1 WO 2015028151A1
Authority
WO
WIPO (PCT)
Prior art keywords
grinding
disc
magnetic field
vessel
grinding tool
Prior art date
Application number
PCT/EP2014/002341
Other languages
German (de)
English (en)
Inventor
Michael Wilczek
Jürgen Schneberger
Reinhard Teutenberg
Original Assignee
Thyssenkrupp Industrial Solutions Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thyssenkrupp Industrial Solutions Ag filed Critical Thyssenkrupp Industrial Solutions Ag
Priority to DK14758093.0T priority Critical patent/DK3041609T3/da
Priority to EP14758093.0A priority patent/EP3041609B1/fr
Publication of WO2015028151A1 publication Critical patent/WO2015028151A1/fr

Links

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
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/10—Mills with balls or rollers centrifugally forced against the inner surface of a ring, the balls or rollers of which are driven by other means than a centrally-arranged member

Definitions

  • the invention relates to a disc vibration mill and a method for operating a disc vibration mill.
  • a conventional disc vibration mill is known, for example, from DE 43 43 742 C2, in which a mill container is arranged such that it can be moved in a mill housing and within the mill container there is provided a loose millstone movable therein.
  • the grinding vessel is placed in a swinging motion, which leads to a relative movement between the grinding vessel and grinding stone.
  • the material to be crushed is crushed between the millstone and the wall of the grinding vessel.
  • the drive device requires several bearings and belts for coupling to the drive, which must be replaced regularly.
  • the required for the drive three-phase motor requires a lot of space.
  • a reduced coefficient of friction between the millstone and the grinding vessel may result in relative movement of the grinding stone on the grinding vessel, or grinding of the grinding stone on the grinding vessel, resulting in increased wear and reduced life.
  • DD 148 189 a device for processing of raw materials and materials is described, in which the material to be crushed is passed through a hollow body having on opposite sides depending on a positive and a negative magnetic pole or a row or chain such poles. Inside the hollow body are magnetizable moldings, preferably balls, which are freely movable. Through an alternating circuit of the magnetic field can be forced up and down or swinging back and forth of the ball in the hollow body, wherein the material to be crushed is shattered by the balls.
  • this type of crushing is associated with a high noise level.
  • the invention is therefore based on the object to provide a new drive for a vibrating mill, which is characterized by a small footprint and reduces the noise of the vibrating mill in the grinding area.
  • the vibrating mill comprises a grinding vessel, at least one grinding tool movable in the grinding vessel with a magnetic or magnetizable component and an excitation system for generating a magnetic field, wherein the magnetic field causes a movement of the at least one grinding tool.
  • the excitation system is arranged around the grinding vessel and designed to generate a rotating magnetic field, wherein a magnetic pressing device is provided for adjusting the contact pressure between the grinding tool and a bottom of the grinding vessel.
  • a grinding tool with a magnetic or magnetizable component is moved through a magnetic field in a grinding vessel, wherein the magnetic field is generated as a circulating magnetic field. Furthermore, the contact pressure between the grinding tool and the bottom of the grinding vessel is adjusted by means of a magnetic pressing device.
  • the excitation system according to the invention can be dispensed with moving elements in the drive system, so wear-prone components, such as bearings and drive belts omitted. It is therefore to be expected with significantly lower costs in the maintenance of the disc vibratory mill.
  • the disc vibratory mill can be made more compact, so that the grinding chamber and thus the grinding tool can be made larger with the same space. This leads to a higher horizontal force during comminution.
  • the grinding force can be individually adapted to the crushing task.
  • the contact pressure can be changed via the strength of the effective magnetic field.
  • the grinding vessel on a ceiling, a bottom and a peripheral wall, wherein the excitation system is arranged in the region of the peripheral wall and / or in the region of the ceiling and / or bottom of the grinding vessel.
  • the grinding vessel preferably has a cylindrical peripheral wall and the grinding tool can be designed as a grinding disk.
  • the excitation system for generating the circulating magnetic field preferably has a plurality of separately controllable exciter coils, which are controlled by a control device.
  • the grinding tool comprises one, preferably two to four or more pairs of poles.
  • the grinding tool may further comprise a core and at least one surrounding the core of a wear-resistant material sheath.
  • the mill container is arranged rigidly, so that can be dispensed with bearings and balance weights.
  • the circulating magnetic field is generated, for example, by means of a plurality of exciting coils arranged around the grinding vessel in that successive exciting coils are subjected to currents which are shifted in their phase. If the grinding tool is disc-shaped, it rolls off through the circulating magnetic field on the peripheral wall of the grinding vessel. The comminution takes place both between the peripheral wall of the mill housing and the grinding disc and below the grinding disc, wherein in the gap between the peripheral wall and grinding disc, the coarse crushing of the material to be ground until the material reaches particle sizes that are fine enough to pass under the grinding disc , There, the fine particles are further crushed by a combination of weight and shear. While in conventional disc vibrating mills, in this area only the weight of the grinding disc acts, according to the Invention, the grinding pressure changed by a magnetic field and adapted to the material to be ground.
  • the disc vibration mill comprises a device for determining the position of the grinding tool in the grinding vessel.
  • a device for determining the position of the grinding tool in the grinding vessel can be arranged, for example, on the inside of the grinding vessel, between the grinding vessel and the grinding tool.
  • the device for determining the position of the grinding tool in the grinding vessel can, for example, comprise a measuring device for measuring the magnetic flux and / or the magnetic return flow and / or the induction voltage of the excitation system, such as a Hall probe or an induction coil arranged in the magnetic field of the exciter system.
  • the movement of the grinding tool in the grinding vessel produces a change in the magnetic field of the exciter system.
  • a measurement of the magnetic flux and / or the magnetic return flow and / or the induction voltage therefore makes it possible to draw conclusions about the position of the grinding tool in the grinding vessel. It is also conceivable to determine the speed of the grinding tool in the grinding vessel from the determined positions of the grinding tool in the grinding vessel.
  • the device for determining the position of the grinding tool in the grinding vessel is designed in such a way that it is connected to the control device of the exciter system.
  • the device for determining the position of the grinding tool preferably transmits the position and / or the rotational speed of the grinding tool in the grinding vessel to the control device of the excitation system. This allows control of the exciter system as a function of the rotational speed of the grinding tool in the grinding vessel.
  • FIG. 1 shows a disk vibrating mill with an exciter system arranged in the region of the circumferential wall
  • Fig. 2a is a schematic representation of the excitation system
  • 2c is a current time diagram for driving the coils of Fig. 2a, 2b,
  • Fig. 3 is a disc vibrating mill with a in the area of the ceiling and the
  • Fig. 4 is a schematic representation of the exciter system
  • Fig. 5 a schematic side view of a disc vibrating mill with a magnetic pressing device
  • Fig. 5b is a bottom view of the disc vibrating mill of FIG. 5a.
  • the disc vibration mill shown in Fig. 1 has a grinding housing 1, in which a grinding vessel 2 is supported by means of a holder 3.
  • the grinding vessel 2 is cylindrical, wherein the diameter in the illustrated embodiment is at least three times its height.
  • the grinding vessel is bounded by a cylindrical peripheral wall 2a, a ceiling 2b and a bottom 2c.
  • In the ceiling 2b opens a Mahlgutzutechnisch 4 for supplying ground material, while in the region of the bottom 2c an outlet valve 5 is provided for the ground material to be ground.
  • the outlet valve 5 cooperates with a pneumatically controlled discharge system 6 and an adjoining regrind discharge line 7.
  • a disc-shaped grinding tool 8 is arranged, which comprises a core 8a and a core surrounding the core Sheath 8b made of a wear-resistant material.
  • the grinding vessel 1 is supported via damping elements 9 on a foundation 10.
  • an excitation system 1 1 which has a plurality of coils I Ia, II b, 1 1c, l ld, ... which are evenly distributed on the outside of the grinding vessel in the region of the peripheral wall 2a are arranged (see Fig. 2a, 2b).
  • the grinding tool 8 in particular its core, has a magnetic or magnetizable component, which is formed in the illustrated embodiment by four Pohlproe 8a, 8b, 8c, 8d.
  • Excitation coils I Ia, I Ib are controlled separately.
  • a cleverly selected phase shift of the currents in the respective windings creates a rotating magnetic field that causes a rolling movement of the grinding tool 8 on the peripheral wall 2a of the grinding vessel 2, as can be seen from Figs. 2a and 2b.
  • Fig. 2a and 2b show the situations to the
  • Time points A and B respectively.
  • the grinding material fed in via the grinding material feed line 4 is first coarsely comminuted between grinding tool 8 and peripheral wall 2a until the material reaches particle sizes which are fine enough to reach the area between grinding tool 8 and bottom 2c. There, the fine particles are further comminuted by a combination of weight and shear, before the material is discharged via the outlet valve 5 and the pneumatically controlled discharge system 6 and the Mahlgutaustrags effet 7.
  • the grinding vessel is fixed here. Due to the rigid arrangement of the grinding vessel higher speeds of the brush are possible because no speed limiting thrust bearing must be provided.
  • the drive concept of the disc vibration mill is based essentially on the principle of a permanent magnet motor, which belongs to the synchronous machines. The only difference is that the runner (in this case the grinding tool 8) is not fixed in the central axis, but can move freely in the grinding chamber.
  • the individual segments of the outer excitation windings are activated in such a way that a circulating magnetic field is created, which sets the grinding tool in rotation by alternating polarization. Overall, the excitation causes the disk-shaped grinding tool to roll on the peripheral wall 2c of the grinding vessel 2.
  • Fig. 3 second embodiment differs from the embodiment of FIG. 1 only by its excitation system 11 ', in turn, by a plurality of separately controllable excitation coils ll' a, 1 1 'b, 11' c, ll 'd ,. .. is formed, but which are arranged in the area of the ceiling 2 b and bottom 2 c of the grinding vessel 2.
  • an axial drive concept is realized.
  • the excitation coils there are laminated cores of the excitation coils as segments of a circular ring in the bottom 2c and ceiling 2b of the grinding vessel 2.
  • the control is sequential, so that a rotating around the central axis of the grinding vessel magnetic field is formed so that the disc-shaped grinding tool 8 moves as a rotating mass on a circular path is (see Fig. 4).
  • a magnetic pressing device 12 is provided for adjusting the contact pressure between the grinding tool 8 and the bottom 2c of the grinding vessel 2 (FIGS. 5a, 5b).
  • a magnetizable core or permanent magnet 8g is provided inside the grinding tool 8, which cooperates with a ring magnet 12a.
  • the ring magnet is arranged exactly on the circular path, which executes the center of the disk-shaped grinding tool 8 during its rotation in the grinding vessel 2.
  • the strength of the effective magnetic field of the pressing device 12 can be adapted to the comminution task. This can be done, for example, by changing the distance between the ring magnet 12 and the bottom 2c of the grinding vessel or by electrically adjusting the strength of the magnetic field.
  • the generation of the additional contact pressure can be additionally realized by the already existing excitation system 1 1 'by the excitation coils in the ceiling 2b with different thickness to the coils in the region

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

L'invention concerne un broyeur vibrant qui possède un récipient de broyage, au moins un outil de broyage mobile dans le récipient de broyage et équipé d'un composant magnétique ou magnétisable ainsi que d'un système excitateur destiné à générer un champ magnétique qui provoque un mouvement du ou des outils de broyage. Le système excitateur est disposé autour du récipient de broyage et configuré pour générer un champ magnétique tournant et un dispositif de pressage magnétique destiné à régler la pression est disposé entre l'outil de broyage et un fond du récipient de broyage. L'invention concerne également un procédé pour faire fonctionner un broyeur vibrant à disques, selon lequel un outil de broyage équipé d'un composant magnétique ou magnétisable est mis en mouvement dans un récipient de broyage, le champ magnétique étant généré sous la forme d'un champ magnétique tournant.
PCT/EP2014/002341 2013-09-02 2014-08-28 Broyeur vibrant à disques et procédé pour faire fonctionner un broyeur vibrant à disques WO2015028151A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DK14758093.0T DK3041609T3 (da) 2013-09-02 2014-08-28 Skivesvingmølle og fremgangsmåde til drift af en skivesvingmølle
EP14758093.0A EP3041609B1 (fr) 2013-09-02 2014-08-28 Broyeur à disque tournant et procédé de fonctionnement d'un broyeur à disque tournant

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013109537.2A DE102013109537A1 (de) 2013-09-02 2013-09-02 Scheibenschwingmühle und Verfahren zum Betreiben einer Scheibenschwingmühle
DE102013109537.2 2013-09-02

Publications (1)

Publication Number Publication Date
WO2015028151A1 true WO2015028151A1 (fr) 2015-03-05

Family

ID=51453723

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/002341 WO2015028151A1 (fr) 2013-09-02 2014-08-28 Broyeur vibrant à disques et procédé pour faire fonctionner un broyeur vibrant à disques

Country Status (4)

Country Link
EP (1) EP3041609B1 (fr)
DE (1) DE102013109537A1 (fr)
DK (1) DK3041609T3 (fr)
WO (1) WO2015028151A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1894106A (en) * 1929-04-29 1933-01-10 Otto J Lehrack Crushing and mixing machine
DE4343742A1 (de) * 1993-12-21 1995-06-22 Krupp Polysius Ag Scheibenschwingmühle
JP2007229701A (ja) * 2006-02-03 2007-09-13 Michio Shibatani 破砕方法及びその装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE412951C (de) * 1924-01-01 1925-04-28 Georg Mars Dipl Ing Verfahren zur Zerkleinerung von Stoffen mittels in einem hohlringfoermigen Mahlgehaeuse umlaufender Kugeln
IT1072925B (it) * 1976-09-29 1985-04-13 Ind Ossidi Sinterizzati Ios S Procedimento e dispositivo per la propulsione dei corpi macinanti dei mulini particolarmente di quelli cosiddetti a palle
DD148189A1 (de) 1979-03-05 1981-05-13 Hans Mau Verfahren und vorrichtung zur roh-und werkstoffaufbereitung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1894106A (en) * 1929-04-29 1933-01-10 Otto J Lehrack Crushing and mixing machine
DE4343742A1 (de) * 1993-12-21 1995-06-22 Krupp Polysius Ag Scheibenschwingmühle
JP2007229701A (ja) * 2006-02-03 2007-09-13 Michio Shibatani 破砕方法及びその装置

Also Published As

Publication number Publication date
DE102013109537A1 (de) 2015-03-05
EP3041609B1 (fr) 2021-02-17
DK3041609T3 (da) 2021-04-26
EP3041609A1 (fr) 2016-07-13

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