EP1110615B1 - Vortex mill - Google Patents

Vortex mill Download PDF

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Publication number
EP1110615B1
EP1110615B1 EP00126687A EP00126687A EP1110615B1 EP 1110615 B1 EP1110615 B1 EP 1110615B1 EP 00126687 A EP00126687 A EP 00126687A EP 00126687 A EP00126687 A EP 00126687A EP 1110615 B1 EP1110615 B1 EP 1110615B1
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EP
European Patent Office
Prior art keywords
opening
outlet
mill
receiving housing
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.)
Expired - Lifetime
Application number
EP00126687A
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German (de)
French (fr)
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EP1110615A1 (en
Inventor
Wulfram Schmid-Meil
Walter Wiegand
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Grenzebach BSH GmbH
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Grenzebach BSH GmbH
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Publication of EP1110615A1 publication Critical patent/EP1110615A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
    • B02C13/18—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor
    • 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
    • B02C13/26—Details
    • B02C13/288—Ventilating, or influencing air circulation
    • 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
    • B02C23/20—Adding fluid, other than for crushing or disintegrating by fluid energy after crushing or disintegrating
    • 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
    • B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
    • B02C2013/145—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with fast rotating vanes generating vortexes effecting material on material impact

Definitions

  • the invention relates to a mill according to the principle of comminution by means of gas vortexes according to the preamble of claim 1.
  • Such a mill is also known as an eddy current mill or impact mill.
  • the term mill means in the following a working mill on this principle, as for example from the DE 27 36 349 A and the DE 197 00 429 A is known.
  • designs with a cone-shaped stator have a relatively easily adjustable grinding gap compared to those with a circular-cylindrical stator.
  • Location designations refer in the following to a mill whose rotor axis of rotation is vertical and whose inlet is located at the top. In practice, other layers of the mill are possible.
  • additives must be added to the material after milling, such as Borax or boric acid to paper, which is used as an insulating material.
  • Borax or boric acid to paper which is used as an insulating material.
  • additional devices with the corresponding effort are required in the known mills.
  • a known mill air inlets are arranged in the lid of the receiving housing.
  • the object of the invention is to provide a mill in which the quantities of air required for milling and for the transport of air are separately adjustable, which works clog-proof, the simple dosing of additives after the Grinding allowed and with respect to the temperature is gentle on the product or allows easy drying without the disadvantages of DE 22 06 384 A in terms of flow conditions to accept.
  • the object is solved by the characterizing features of claim 1. Characterized in that an opening is arranged in the jacket of the receiving housing in addition to the opening for the outlet, a portion of the required for grinding and transporting the total air flow can be supplied after grinding, without being passed through the grinder. This makes it possible to adjust the air flow required for grinding optimally and independently of the air flow for the clog-free transport, which is usually much larger and thus decisive for the total air flow.
  • relatively cold air can be supplied immediately after grinding through the opening according to the invention. This causes a rapid cooling of the ground material to a harmless temperature.
  • heated air may be supplied if post drying drying is required.
  • Additives can simply be introduced into the opening via a metering line, e.g. be gedüst and are then in the receiving housing of the mill, in which high turbulence prevail, intimately mixed with the ground Good.
  • the variability of the size of the opening allows the optimum adjustment of the air flow, which is supplied after leaving the grinding zone, depending on the good and the throughput.
  • FIG. 1 To FIG. 1 are mounted on a machine frame 1 with feet 2, a mill 3 and a motor 4.
  • the mill 3 is essentially constructed of a receiving housing 5, a stator 6 and a rotor 7.
  • the receiving housing 5, in the FIGS. 2 and 3 is shown as a detail, is rotationally symmetrical in plan and consists of a welded construction. It consists essentially of an outer cylindrical jacket 8, which is arranged vertically and on the internals and at the lower end inside an annular disc 9 are fixed as a bearing surface. As internals, a cylindrical ring 10 with attached annular disc 11, which is arranged vertically within and spaced from the jacket 8, and arranged as a connection, a horizontal bottom 12 with the jacket 8. The attachment between shell 8 and bottom 12 is stabilized with suitable means, not shown. Between bottom 12, casing 8, ring 10, washer 11, a bearing housing 22 and each of the lower edge of the rotor 7 and stator 6, an annular channel 18 is limited. In the jacket 8 are radially spaced two rectangular openings 13, 14 are arranged.
  • the one opening 13 is formed as an outlet with a cuboid outlet tube 15, which is arranged outside of the opening 13.
  • a vertical wall of the outlet tube 15 is attached tangentially to the jacket 8.
  • the other opening 14 is formed as an air inlet, arranged in the direction of rotation of the rotor 7 behind the opening 13 and provided with an externally mounted nozzle 16, to which a device 17 is fixed with a variable opening cross-section.
  • the opening 14 extends from the top edge of the bottom 12 to a height approximately corresponding to the top edge of the ring 10 and is about twice as wide as it is high.
  • device 17 e.g. a slide or a flap suitable.
  • a dosing line 34 for additives (additives) can be arranged on the connection piece 16 or in a pipeline possibly upstream of the flow direction.
  • a partition 19 is vertically arranged in the channel 18 so that it leads tangentially from the ring 10 and parallel to the outlet tube 15 to the side of the outlet tube 15, which is the opening 14 closest.
  • a plate 20 is guided perpendicular to the jacket 8 between the ring 10 and the jacket 8.
  • the plate 20 extends from the partition wall 19 to a length corresponding to about 15 ° behind the opening 14, in which case the extension of End edge through the center of the mill 3 runs.
  • the plate 20 has a slope such that an imaginary extension of the plate 20 in the direction of the slope at the outlet 12 cuts the bottom.
  • a vertical air baffle 21 is arranged between the bottom 12 and the plate 20. It extends over about its half length straight from the end of the plate 20 which faces away from the opening 13 in the direction of the opening 13 and then bent in a circle over about 80 ° to the opening 14.
  • the one end of the air baffle 21 is approximately 1/5 of the width of the bottom 12 away from the jacket 8, the other has approximately the same distance to the next side of the opening 14th
  • the bearing housing 22 is mounted on the disc ring 11.
  • a shaft 23 is rotatably mounted.
  • a pulley 24 is fixed, which is drivable via a plurality of V-belt 25 and the pulley 26 which is fixed to the drive shaft of the motor 4.
  • the rotor 7 is fixed. On the outer circumference of the rotor 7 a plurality of grinding media 27 are mounted in four levels. Above and below the rotor 7 is limited by a respective disk 28, 29. The rotor 7 with the grinding bodies 27 has the contour of a truncated cone. On the discs 28, 29 Vorzerkleinintechnikstechnikmaschinemaschinemaschinee 30 and fan blades 31 are attached.
  • the stator 6 is mounted indirectly on the jacket 8 and connected to e.g. Fastened screws. Between jacket 8 and stator 6, a sleeve is arranged in each case around a screw shaft as a spacer. In the stator 6 a replaceable armor 32 is attached, which is possibly constructed of several individual parts. The armor 32 has a corrugation, which runs approximately perpendicular to the rotation of the stator 6. In the lid region of the stator 6, an inlet opening 33 is arranged centrally.
  • the material is input via, for example, a pipe, not shown, in the inlet opening 33 and ground in a known manner between the grinding media 27 and the armor 32.
  • the milled material together with a respective air flow defined according to the material is discharged through, for example, a fan, not shown, from the mill 3, which is connected to the outlet pipe 15 via piping and a separation device (not shown).
  • the grinding gap is adjustable.
  • different lengths of the sleeves can be used, on which the stator 6 is mounted as a spacer.
  • the residence time of the goods in the milling area for the grinding result prevails, which in turn depends on the air flow, which is pulled through the grinding area.
  • the opening 14 and the device 17 it is possible to adjust this air flow independently of the total air flow, which is conveyed by the fan.
  • the cross section of the device 17 is changed so that adjusts the optimal air flow through the grinding area in dependence on the through the opening 14 in accordance with the flow resistance.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Shovels (AREA)
  • Motorcycle And Bicycle Frame (AREA)

Abstract

In the vortex grinder which uses a vortex gas flow in addition to the opening (13) for the discharge in the sleeve (8) of the housing (5) which takes up the grinding material there is a further opening (14) associated with a device (17) with variable opening cross-section. Seen in the direction of rotation of the rotor the additional opening is set shortly behind the discharge opening. A vertical partition (19) in the cross section of the housing is set in the outlet pipe area (15) so that it runs tangentially from the inner restriction of the housing to the side of the outlet pipe closest to the additional opening.

Description

Die Erfindung betrifft eine Mühle nach dem Prinzip der Zerkleinerung mittels Gaswirbeln gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a mill according to the principle of comminution by means of gas vortexes according to the preamble of claim 1.

Eine solche Mühle ist auch als Wirbelstrommühle oder Prallmühle bekannt. Der Begriff Mühle bedeutet im folgenden eine nach diesem Prinzip arbeitende Mühle, wie sie z.B. aus der DE 27 36 349 A und der DE 197 00 429 A bekannt ist. Dabei weisen Ausführungen mit konusförmigem Stator gegenüber denen mit kreiszylindrischem Stator einen relativ einfach verstellbaren Mahlspalt auf.Such a mill is also known as an eddy current mill or impact mill. The term mill means in the following a working mill on this principle, as for example from the DE 27 36 349 A and the DE 197 00 429 A is known. In this case, designs with a cone-shaped stator have a relatively easily adjustable grinding gap compared to those with a circular-cylindrical stator.

Lagebezeichnungen beziehen sich im folgenden auf eine Mühle, deren Rotor- Drehachse vertikal und deren Einlaß oben angeordnet sind. In der Praxis sind auch andere Lagen der Mühle möglich.Location designations refer in the following to a mill whose rotor axis of rotation is vertical and whose inlet is located at the top. In practice, other layers of the mill are possible.

Bei den bekannten Mühlen besteht das Problem, daß zusätzlich zu der Luftmenge, die für das Vermahlen erforderlich und optimal ist, Transportluft durch die Mühle gesaugt werden muß, um Störungen wie Verstopfungen zu vermeiden. Diese zusätzliche Luftmenge, die abhängig vom jeweiligen Gut und der geforderten Gleichmäßigkeit der Feinheit des Produkts ist, wirkt sich negativ auf die Verweilzeit des Gutes in der Mühle und damit auf das optimale Vermahlen aus. Die Mühlen müssen daher entsprechend groß ausgelegt sein, um das gewünschte Mahlergebnis zu erreichen.In the known mills there is the problem that, in addition to the amount of air required and optimal for grinding, transport air must be drawn through the mill in order to avoid disturbances such as clogging. This additional amount of air, which is dependent on the particular good and the required uniformity of the fineness of the product, has a negative effect on the residence time of the material in the mill and thus on the optimal grinding. The mills must therefore be designed to be large enough to achieve the desired grinding result.

In der Mahlzone der Mühle erwärmen sich das Gut und die Luft. Daher besteht bei temperaturempfindlichem Gut das Problem, daß es möglichst schnell gekühlt werden muß, um Schädigungen des Gutes und Störungen des Mahlbetriebs z.B. durch Verkleben von Fetten und Ölen zu vermeiden.In the grinding zone of the mill, the goods and the air warm up. Therefore, there is the problem with temperature-sensitive material that it must be cooled as quickly as possible to damage the goods and disturbances of the grinding operation, for example. by gluing fats and oils to avoid.

Bei einigen Anwendungen müssen dem Gut nach dem Vermahlen Zusatzstoffe zudosiert werden, wie z.B. Borax oder Borsäure zu Papier, das als Dämmstoff eingesetzt wird. Hierfür sind bei den bekannten Mühlen zusätzliche Vorrichtungen mit entsprechendem Aufwand erforderlich.In some applications additives must be added to the material after milling, such as Borax or boric acid to paper, which is used as an insulating material. For this purpose, additional devices with the corresponding effort are required in the known mills.

Bei einer weiteren aus der DE 22 06 384 A bekannten Mühle sind Lufteinläße im Deckel des Aufnahmegehäuses angeordnet.In another from the DE 22 06 384 A known mill air inlets are arranged in the lid of the receiving housing.

Aufgabe der Erfindung ist es, eine Mühle zu schaffen, bei der die für das Vermahlen und die für den Transport erforderlichen Luftmengen getrennt einstellbar sind, die verstopfsicher arbeitet, die eine einfache Dosierung von Zusatzstoffen nach dem Vermahlen erlaubt und die bezogen auf die Temperatur produktschonend ist bzw. eine einfache Nachtrocknung erlaubt, ohne die Nachteile von DE 22 06 384 A bezüglich der Strömungsverhältnisse in Kauf nehmen zu müssen.The object of the invention is to provide a mill in which the quantities of air required for milling and for the transport of air are separately adjustable, which works clog-proof, the simple dosing of additives after the Grinding allowed and with respect to the temperature is gentle on the product or allows easy drying without the disadvantages of DE 22 06 384 A in terms of flow conditions to accept.

Die Aufgabe ist durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. Dadurch daß im Mantel des Aufnahmegehäuses zusätzlich zu der Öffnung für den Auslaß eine Öffnung angeordnet ist, kann ein Teil des für das Vermahlen und den Transport erforderlichen Gesamtluftstromes nach dem Vermahlen zugeführt werden, ohne daß er durch das Mahlwerk geführt wird. Hierdurch ist es möglich, den Luftstrom, der für das Vermahlen erforderlich ist, optimal und unabhängig vom Luftstrom für den verstopfungsfreien Transport einzustellen, der meistens wesentlich größer und somit maßgebend für den Gesamtluftstrom ist.The object is solved by the characterizing features of claim 1. Characterized in that an opening is arranged in the jacket of the receiving housing in addition to the opening for the outlet, a portion of the required for grinding and transporting the total air flow can be supplied after grinding, without being passed through the grinder. This makes it possible to adjust the air flow required for grinding optimally and independently of the air flow for the clog-free transport, which is usually much larger and thus decisive for the total air flow.

Weiterhin kann durch die erfindungsgemäße Öffnung relativ kalte Luft unmittelbar nach dem Vermahlen zugeführt werden. Dies bewirkt eine rasche Abkühlung des gemahlenen Gutes auf eine unschädliche Temperatur. Andererseits kann bei weniger temperaturempfindlichen Gütern erwärmte Luft zugeführt werden, wenn eine Nachtrocknung nach dem Vermahlen erforderlich ist.Furthermore, relatively cold air can be supplied immediately after grinding through the opening according to the invention. This causes a rapid cooling of the ground material to a harmless temperature. On the other hand, with less temperature sensitive goods, heated air may be supplied if post drying drying is required.

Zusatzstoffe können einfach über eine Dosierleitung in die Öffnung eingeführt, z.B. gedüst werden und werden dann im Aufnahmegehäuse der Mühle, in dem hohe Turbulenzen vorherrschen, innig mit dem gemahlenen Gut vermischt.Additives can simply be introduced into the opening via a metering line, e.g. be gedüst and are then in the receiving housing of the mill, in which high turbulence prevail, intimately mixed with the ground Good.

Die Veränderbarkeit der Größe der Öffnung ermöglicht die optimale Anpassung des Luftstroms, der nach Verlassen der Mahlzone zugeführt wird, in Abhängigkeit vom Gut und vom Durchsatz.The variability of the size of the opening allows the optimum adjustment of the air flow, which is supplied after leaving the grinding zone, depending on the good and the throughput.

Die Unteransprüche betreffen vorteilhafte Ausbildungen der Erfindung.The subclaims relate to advantageous embodiments of the invention.

Die Anordnung der Öffnung nach Anspruch 2- im Drehsinn des Rotors - kurz hinter dem Auslaß bewirkt, daß praktisch der gesamte Kanal, der im Aufnahmegehäuse gebildet ist, von der Transportluft durchströmt ist. Daher herrscht eine ausreichende Strömung für den Abtransport und für die Kühlung bzw. Nachtrocknung des Gutes vor.The arrangement of the opening according to claim 2- in the direction of rotation of the rotor - just behind the outlet causes virtually the entire channel, which is formed in the receiving housing, is flowed through by the transport air. Therefore, there is a sufficient flow for the removal and for cooling or post-drying of the goods.

Die Ausbildungen nach Ansprüchen 3 bis 7 bewirken günstige strömungstechnische Verhältnisse und vermindern das Risiko von Ablagerungen.The embodiments according to claims 3 to 7 cause favorable fluidic conditions and reduce the risk of deposits.

Die Erfindung wird anhand eines vereinfacht dargestellten Beispiels näher erläutert.

  • Figur 1 zeigt den Längsschnitt durch eine Mühle mit Antrieb, Motor nicht geschnitten.
  • Figur 2 zeigt das Aufnahmegehäuse einer Mühle nach Figur 1 als vergrößertes Detail senkrecht von oben, teilweise geschnitten.
  • Figur 3 zeigt einen Längsschnitt gemäß Figur 2 ohne Darstellung des Auslasses.
The invention will be explained in more detail with reference to a simplified example.
  • FIG. 1 shows the longitudinal section through a mill with drive, motor not cut.
  • FIG. 2 shows the receiving housing of a mill FIG. 1 as an enlarged detail vertically from above, partially cut.
  • FIG. 3 shows a longitudinal section according to FIG. 2 without representation of the outlet.

Nach Figur 1 sind auf einem Maschinengestell 1 mit Füßen 2 eine Mühle 3 und ein Motor 4 befestigt. Die Mühle 3 ist im wesentlichen aus einem Aufnahmegehäuse 5, einem Stator 6 und einem Rotor 7 aufgebaut.To FIG. 1 are mounted on a machine frame 1 with feet 2, a mill 3 and a motor 4. The mill 3 is essentially constructed of a receiving housing 5, a stator 6 and a rotor 7.

Das Aufnahmegehäuse 5, das in den Figuren 2 und 3 als Einzelheit dargestellt ist, ist im Grundriß rotationssymmetrisch aufgebaut und besteht aus einer Schweißkonstruktion. Es besteht im wesentlichen aus einem äußeren zylindrischen Mantel 8, der vertikal angeordnet ist und an dem Einbauten und am unteren Ende innen eine Ringscheibe 9 als Auflagefläche befestigt sind. Als Einbauten sind ein zylindrischer Ring 10 mit aufgesetzter Ringscheibe 11, der innerhalb des und beabstandet vom Mantel 8 vertikal angeordnet ist, und als Verbindung ein horizontaler Boden 12 mit dem Mantel 8 angeordnet. Die Befestigung zwischen Mantel 8 und Boden 12 ist mit geeigneten, nicht dargestellten Mitteln stabilisiert. Zwischen Boden 12, Mantel 8, Ring 10, Ringscheibe 11, einem Lagergehäuse 22 und jeweils der Unterkante von Rotor 7 und Stator 6 ist ein ringförmiger Kanal 18 begrenzt. Im Mantel 8 sindradial beabstandet zwei rechteckige Öffnungen 13, 14 angeordnet.The receiving housing 5, in the FIGS. 2 and 3 is shown as a detail, is rotationally symmetrical in plan and consists of a welded construction. It consists essentially of an outer cylindrical jacket 8, which is arranged vertically and on the internals and at the lower end inside an annular disc 9 are fixed as a bearing surface. As internals, a cylindrical ring 10 with attached annular disc 11, which is arranged vertically within and spaced from the jacket 8, and arranged as a connection, a horizontal bottom 12 with the jacket 8. The attachment between shell 8 and bottom 12 is stabilized with suitable means, not shown. Between bottom 12, casing 8, ring 10, washer 11, a bearing housing 22 and each of the lower edge of the rotor 7 and stator 6, an annular channel 18 is limited. In the jacket 8 are radially spaced two rectangular openings 13, 14 are arranged.

Die eine Öffnung 13 ist als Auslaß ausgebildet mit einem quaderförmigen Auslaßrohr 15, das außen an der Öffnung 13 angeordnet ist. Hierbei ist eine vertikale Wand des Auslaßrohrs 15 tangential am Mantel 8 befestigt.The one opening 13 is formed as an outlet with a cuboid outlet tube 15, which is arranged outside of the opening 13. Here, a vertical wall of the outlet tube 15 is attached tangentially to the jacket 8.

Die andere Öffnung 14 ist als Lufteinlaß ausgebildet, im Drehsinn des Rotors 7 hinter der Öffnung 13 angeordnet und mit einem außen angebrachten Stutzen 16 versehen, an dem eine Vorrichtung 17 mit veränderbarem Öffnungsquerschnitt befestigt ist. Die Öffnung 14 erstreckt sich von der Oberkante des Bodens 12 bis zu einer Höhe ungefähr entsprechend der Oberkante des Rings 10 und ist in etwa doppelt so breit wie hoch. Als Vorrichtung 17 ist z.B. ein Schieber oder eine Klappe geeignet. An dem Stutzen 16 oder in einer in Strömungsrichtung ggf. vorgeschalteten Rohrleitung kann bei Bedarf eine Dosierleitung 34 für Zusatzstoffe (Additive) angeordnet sein.The other opening 14 is formed as an air inlet, arranged in the direction of rotation of the rotor 7 behind the opening 13 and provided with an externally mounted nozzle 16, to which a device 17 is fixed with a variable opening cross-section. The opening 14 extends from the top edge of the bottom 12 to a height approximately corresponding to the top edge of the ring 10 and is about twice as wide as it is high. As device 17, e.g. a slide or a flap suitable. If necessary, a dosing line 34 for additives (additives) can be arranged on the connection piece 16 or in a pipeline possibly upstream of the flow direction.

Zwischen den Öffnungen 13 und 14 ist im Kanal 18 eine Trennwand 19 vertikal so angeordnet, daß sie tangential vom Ring 10 und parallel zum Auslaßrohr 15 zu der Seite des Auslaßrohrs 15 führt, die der Öffnung 14 am nächsten liegt. Im Kanal 18 ist eine Platte 20 senkrecht zum Mantel 8 zwischen dem Ring 10 und dem Mantel 8 geführt. Die Platte 20 erstreckt sich von der Trennwand 19 bis zu einer Länge entsprechend etwa 15° hinter die Öffnung 14, wobei hier die Verlängerung der Abschlußkante durch den Mittelpunkt der Mühle 3 läuft. In Drehrichtung des Rotors 7 hat die Platte 20 ein Gefälle derart, daß eine gedachte Verlängerung der Platte 20 in Richtung des Gefälles beim Auslaß den Boden 12 schneidet.Between the openings 13 and 14, a partition 19 is vertically arranged in the channel 18 so that it leads tangentially from the ring 10 and parallel to the outlet tube 15 to the side of the outlet tube 15, which is the opening 14 closest. In the channel 18, a plate 20 is guided perpendicular to the jacket 8 between the ring 10 and the jacket 8. The plate 20 extends from the partition wall 19 to a length corresponding to about 15 ° behind the opening 14, in which case the extension of End edge through the center of the mill 3 runs. In the direction of rotation of the rotor 7, the plate 20 has a slope such that an imaginary extension of the plate 20 in the direction of the slope at the outlet 12 cuts the bottom.

Zwischen dem Boden 12 und der Platte 20 ist ein senkrechtes Luftleitblech 21 angeordnet. Es erstreckt sich über etwa seine halbe Länge gerade von dem Ende der Platte 20, das der Öffnung 13 abgewandt ist, in Richtung der Öffnung 13 und dann kreisförmig gebogen über ca. 80° bis zur Öffnung 14. Das eine Ende des Luftleitblechs 21 ist etwa 1/5 der Breite des Bodens 12 vom Mantel 8 entfernt, das andere hat in etwa den selben Abstand zur nächsten Seite der Öffnung 14.Between the bottom 12 and the plate 20, a vertical air baffle 21 is arranged. It extends over about its half length straight from the end of the plate 20 which faces away from the opening 13 in the direction of the opening 13 and then bent in a circle over about 80 ° to the opening 14. The one end of the air baffle 21 is approximately 1/5 of the width of the bottom 12 away from the jacket 8, the other has approximately the same distance to the next side of the opening 14th

Das Lagergehäuse 22 ist auf dem Scheibenring 11 befestigt. Im Lagergehäuse 22 ist eine Welle 23 drehbar gelagert. Am unteren Ende der Welle 23 ist eine Riemenscheibe 24 befestigt, die über eine Vielzahl von Keilriemen 25 und die Riemenscheibe 26, die an der Antriebswelle des Motors 4 befestigt ist, antreibbar ist.The bearing housing 22 is mounted on the disc ring 11. In the bearing housing 22, a shaft 23 is rotatably mounted. At the lower end of the shaft 23, a pulley 24 is fixed, which is drivable via a plurality of V-belt 25 and the pulley 26 which is fixed to the drive shaft of the motor 4.

An dem oberen Ende der Welle 23 ist der Rotor 7 befestigt. Am Außenumfang des Rotors 7 sind in vier Ebenen eine Vielzahl Mahlkörper 27 befestigt. Oben und unten ist der Rotor 7 durch jeweils eine Scheibe 28, 29 begrenzt. Der Rotor 7 mit den Mahlkörpern 27 hat die Kontur eines Kegelstumpfes. Auf den Scheiben 28, 29 sind Vorzerkleinerungswerkzeuge 30 und Ventilatorflügel 31 befestigt.At the upper end of the shaft 23, the rotor 7 is fixed. On the outer circumference of the rotor 7 a plurality of grinding media 27 are mounted in four levels. Above and below the rotor 7 is limited by a respective disk 28, 29. The rotor 7 with the grinding bodies 27 has the contour of a truncated cone. On the discs 28, 29 Vorzerkleininerungswerkzeuge 30 and fan blades 31 are attached.

Der Stator 6 ist mittelbar auf dem Mantel 8 gelagert und mit z.B. Schrauben befestigt. Zwischen Mantel 8 und Stator 6 ist jeweils um einen Schraubenschaft eine Hülse als Abstandhalter angeordnet. Im Stator 6 ist eine austauschbare Panzerung 32 befestigt, die ggf. aus mehreren Einzelteilen aufgebaut ist. Die Panzerung 32 weist eine Riffelung auf, die in etwa senkrecht zur Rotation des Stators 6 verläuft. Im Deckelbereich des Stators 6 ist mittig eine Eintrittsöffnung 33 angeordnet.The stator 6 is mounted indirectly on the jacket 8 and connected to e.g. Fastened screws. Between jacket 8 and stator 6, a sleeve is arranged in each case around a screw shaft as a spacer. In the stator 6 a replaceable armor 32 is attached, which is possibly constructed of several individual parts. The armor 32 has a corrugation, which runs approximately perpendicular to the rotation of the stator 6. In the lid region of the stator 6, an inlet opening 33 is arranged centrally.

Im Betrieb wird das Gut über z.B. eine nicht dargestellte Rohrleitung in die Eintrittsöffnung 33 eingegeben und auf bekannte Weise zwischen den Mahlkörpern 27 und der Panzerung 32 vermahlen. Das gemahlene Gut zusammen mit einem jeweils dem Gut entsprechend definierten Luftstrom wird durch z.B. einen nicht dargestellten Ventilator aus der Mühle 3 ausgetragen, der mit dem Auslaßrohr 15 über Rohrleitungen und eine Abscheidevorrichtung (jeweils nicht dargestellt) verbunden ist. Um die gewünschte Feinheit zu erreichen, ist einerseits der Mahlspalt verstellbar. Hierfür sind unterschiedliche Längen der Hülsen einsetzbar, auf denen als Abstandhalter der Stator 6 gelagert ist. Andererseits ist die Aufenthaltszeit des Gutes im Mahlbereich für das Mahlergebnis maßgebend, die wiederum von dem Luftstrom abhängt, der durch den Mahlbereich gezogen wird. Über die Öffnung 14 und die Vorrichtung 17 ist es möglich, diesen Luftstrom unabhängig vom Gesamtluftstrom, der vom Ventilator gefördert wird, einzustellen. Hierfür wird der Querschnitt der Vorrichtung 17 so verändert, daß sich entsprechend den Strömungswiderständen der optimale Luftstrom durch den Mahlbereich in Abhängigkeit von dem durch die Öffnung 14 einstellt.In operation, the material is input via, for example, a pipe, not shown, in the inlet opening 33 and ground in a known manner between the grinding media 27 and the armor 32. The milled material together with a respective air flow defined according to the material is discharged through, for example, a fan, not shown, from the mill 3, which is connected to the outlet pipe 15 via piping and a separation device (not shown). In order to achieve the desired fineness, on the one hand the grinding gap is adjustable. For this purpose, different lengths of the sleeves can be used, on which the stator 6 is mounted as a spacer. On the other hand, the residence time of the goods in the milling area for the grinding result prevails, which in turn depends on the air flow, which is pulled through the grinding area. Via the opening 14 and the device 17, it is possible to adjust this air flow independently of the total air flow, which is conveyed by the fan. For this purpose, the cross section of the device 17 is changed so that adjusts the optimal air flow through the grinding area in dependence on the through the opening 14 in accordance with the flow resistance.

Claims (8)

  1. A mill operating on the principle of crushing by means of gas vortices, with at least one grinding stage, consisting of
    a circular-cylindrical or frustoconical stator (6),
    with a driveable rotor (7) to which a plurality of grinding bodies (27) arranged optionally in several stages one above another are fastened,
    with a receiving housing (5) in which an annular duct (18) is formed in which the ready ground material is collected and is transported to an outlet by means of a gas stream, and with devices succeeding the outlet of the mill for separating off the ground material and for extracting gas,
    characterised in that in addition to an opening (13) for the outlet an opening (14) is arranged as an air inlet in a casing (8) of the receiving housing (5), with which opening is associated a device (17) with a changeable opening cross-section.
  2. A mill according to Claim 1, characterised in that the opening (14) for the air inlet, viewed in the direction of rotation of the rotor (7), is located shortly behind the opening (13) for the outlet.
  3. A mill according to Claim 1 or 2, characterised in that the receiving housing (5) has a substantially constant cross-section.
  4. A mill according to one of Claims 1 to 3, characterised in that in the cross-section of the receiving housing (5) a perpendicular partition (19) is arranged in the region of the outlet pipe (15) such that it leads tangentially from the inner limits of the receiving housing (5) to the side of the outlet pipe (15) which is closest to the opening (14) for the air inlet.
  5. A mill according to one of Claims 1 to 4, characterised in that above the base (12) of the receiving housing (5) a plate (20) extends from the partition (19) to behind the opening (14) for the air inlet.
  6. A mill according to Claim 5, characterised in that the plate (20) is inclined downwards in the direction of rotation of the rotor (7) such that the imaginary extension of the plate (20) intersects the base (12) at the outlet.
  7. A mill according to one of Claims 1 to 6, characterised in that a baffle plate (21) is arranged in the region of the opening (14) for the air inlet.
  8. A mill according to one of Claims 1 to 7, characterised in that a metering line (34) for additives is located on the port (16) or on a preceding line.
EP00126687A 1999-12-22 2000-12-05 Vortex mill Expired - Lifetime EP1110615B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19962049A DE19962049C2 (en) 1999-12-22 1999-12-22 Whirlwind Mill
DE19962049 1999-12-22

Publications (2)

Publication Number Publication Date
EP1110615A1 EP1110615A1 (en) 2001-06-27
EP1110615B1 true EP1110615B1 (en) 2008-04-16

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Application Number Title Priority Date Filing Date
EP00126687A Expired - Lifetime EP1110615B1 (en) 1999-12-22 2000-12-05 Vortex mill

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EP (1) EP1110615B1 (en)
AT (1) ATE392257T1 (en)
DE (2) DE19962049C2 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10101464C2 (en) * 2001-01-12 2003-03-06 Babcock Bsh Gmbh Plant for the production of powdered sugar from granulated sugar or inverted sugar
DE20208606U1 (en) * 2002-06-03 2003-10-16 Pallmann Kg Maschf Bearing for rotary grinding mill has air passages surrounding the bearing housing to promote airflow from outside for cooling
DE602005008929D1 (en) * 2005-06-16 2008-09-25 Kraft Foods R & D Inc Process for producing chocolate granules Base material for chocolate production
DE102006017552A1 (en) * 2006-04-13 2007-10-25 Aufbereitungstechnologie Noll Gmbh Device for mixing, grinding, drying and coating of various substances in the fineness range of 500μm and below, namely impact mill
US8067051B2 (en) 2006-06-19 2011-11-29 Kraft Foods R & D, Inc. Process for milling cocoa shells
US7900860B2 (en) * 2007-04-05 2011-03-08 Lehigh Technologies, Inc. Conical-shaped impact mill
DE102007057565A1 (en) 2007-11-29 2009-06-04 Microtec Gmbh Eddy current mill, rotor and stator, as well as grinding track insert and grinding tool insert for it
DE102007060072B4 (en) 2007-12-13 2013-03-28 Lehigh Technologies, Inc. Whirlwind Mill
DE102009020708A1 (en) * 2009-05-11 2010-11-18 Pallmann Maschinenfabrik Gmbh & Co Kg Device for crushing feedstock
DE102012108295A1 (en) 2012-09-06 2014-05-15 Thyssenkrupp Resource Technologies Gmbh Apparatus and method for processing refuse derived fuels
DE102013206275A1 (en) * 2013-04-10 2014-10-16 Panel Board Holding Bv Method and device for shredding

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2124159B1 (en) * 1971-02-10 1973-05-11 Ultrafine
DE2736349A1 (en) * 1977-08-12 1979-02-22 Krauss Maffei Ag Plastic or fibrous material crusher - has wear resistant liner rings with sharp cutting edges on recesses producing rasping effect
DE3543370A1 (en) * 1985-12-07 1987-06-11 Jackering Altenburger Masch MILL WITH SEVERAL GRINDINGS
DE3702787A1 (en) * 1987-01-30 1988-08-11 Bayer Ag METHOD AND DEVICE FOR MICRONIZING SOLIDS IN JET MILLS
DE4124855C2 (en) * 1990-09-22 2001-02-01 Buehler Gmbh Pin mill
DE4327043A1 (en) * 1993-08-12 1995-02-16 Tribomechanik Gmbh Rapid mill
DE19700429A1 (en) * 1997-01-09 1998-07-23 Bayer Ag Multistage grain milling machine

Also Published As

Publication number Publication date
ATE392257T1 (en) 2008-05-15
DE19962049C2 (en) 2003-02-27
DE50015108D1 (en) 2008-05-29
DE19962049A1 (en) 2001-07-26
EP1110615A1 (en) 2001-06-27

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