EP0478566B2 - Verfahren und vorrichtung zur regelung der drehzahl bei rührwerkskugelmühlen - Google Patents

Verfahren und vorrichtung zur regelung der drehzahl bei rührwerkskugelmühlen Download PDF

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Publication number
EP0478566B2
EP0478566B2 EP90906898A EP90906898A EP0478566B2 EP 0478566 B2 EP0478566 B2 EP 0478566B2 EP 90906898 A EP90906898 A EP 90906898A EP 90906898 A EP90906898 A EP 90906898A EP 0478566 B2 EP0478566 B2 EP 0478566B2
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EP
European Patent Office
Prior art keywords
agitator
rotational speed
measured
torque
control device
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
EP90906898A
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German (de)
English (en)
French (fr)
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EP0478566B1 (de
EP0478566A1 (de
Inventor
Hermann Getzmann
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.)
Individual
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Individual
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Publication date
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Application filed by Individual filed Critical Individual
Priority to AT90906898T priority Critical patent/ATE99562T1/de
Publication of EP0478566A1 publication Critical patent/EP0478566A1/de
Publication of EP0478566B1 publication Critical patent/EP0478566B1/de
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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
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge

Definitions

  • the invention relates to a method and a device for process control in agitator ball mills, which have a grinding chamber with grinding balls contained therein, a rotatably mounted agitator body arranged in the grinding chamber and a drive for the agitator body, the speed n of the agitator body being measured (see DE 36 14 980 C1).
  • Agitator ball mills are e.g. used for incorporating solid powders into liquid media (dispersing) and for wet grinding of solid substances.
  • the torque of the agitator shaft depends both on the internal parameters of the agitator ball mill and on the nature of the material to be ground in the grinding chamber. In the known agitator ball mills there are therefore changes in the torque of the agitator shaft. At high torques there is a risk of overloading the drive motor for the agitator shaft.
  • the invention has for its object to provide a method which ensures better process control in agitator ball mills, and in creating an apparatus for performing the method.
  • the torque M or the mechanical stirring power P can be kept constant by regulating the speed n. This enables a significantly improved process control compared to conventional agitator ball mills.
  • the invention can be vertical or horizontal operable agitator ball mills can be used with continuous or discontinuous operation. With agitator ball mills, it is advantageous both for use in the laboratory and for production.
  • the speed n can be measured either by known mechanical or inductive methods.
  • the torque M can, as is also known, e.g. can be determined by strain gauges, by using screw-type measuring shafts, by eddy current methods, by determining a reaction torque or by measuring the current consumption of an electric motor taking into account the motor characteristic.
  • the latter method is particularly advantageous when using a disc motor as the drive of the agitator body.
  • the measurement data are preferably put into a computing unit. This calculates the value for the mechanical stirring power P based on the equation given above. The values are compared with the specified setpoint for M or P. The speed n is then regulated by a control pulse dependent on the comparison result via a controller unit.
  • the measured or calculated values for one or more of the variables n, M and P and, if appropriate, the predetermined target value can be stored for documentation and / or further processing. They can be made available as analog signals or in digitized form by an external computer or an x / t recorder. The computer can also take over process control tasks as a control device in connection with a corresponding peripheral device.
  • the values are expediently displayed in order to enable the measured or calculated variables n, M and P and the control process to be checked.
  • a device for performing the method according to the invention has measuring devices for measuring the speed n and the torque M of the agitator body of the agitator ball mill and a control device with which the speed n can be regulated so that the torque M or the mechanical stirring power P according to the equation given above meet specified target values.
  • the setpoints are in the control device can be entered for sizes M and P.
  • the control device is connected to the measuring devices for transmitting the measurement data and to the drive of the agitator body for regulating the speed n.
  • the control device can have electronic modules for determining the mechanical stirring power P as a function of the measured values for the variables n and M and an electronic control part for controlling the speed n.
  • control device can include an external computer for determining the mechanical stirring power P as a function of the measured values for the variables n and M and a speed sensor for regulating the speed n.
  • control device can have a memory in which the measured or calculated values for one or more of the variables n, M and P and / or the predetermined target value can be stored for documentation and / or further processing.
  • the control device can also have a display device with which the values mentioned can be represented on a pointer scale or digitally.
  • the drawing shows a schematic diagram for controlling the speed of an agitator ball mill.
  • the agitator ball mill as shown in the drawing in part in section, consists of a grinding chamber 2 with grinding balls 3 contained therein, a rotatably mounted agitator body 4 arranged in the grinding chamber 2 and an electric motor 5 for driving the agitator body.
  • the measuring device 7 can e.g. Inductively determine the speed n.
  • the torque M can e.g. can be measured by the current consumption of an electric motor.
  • the measurement data for the quantities n and M are shown in the drawing by arrows, transmitted from the measuring devices 7 and 8 to a control device 9.
  • the measured values for the quantities n and M are stored in the control device 9.
  • setpoints for the quantities M or P can be entered.
  • the entered target value is also stored in the control device 9.
  • the measured values are compared with the entered target value.
  • the speed n is regulated by a control unit, not shown in the drawing, by means of a control pulse dependent on the comparison result.
  • the speed control is illustrated schematically in the drawing by an arrow.
  • the control device also has pointer scales, not shown in the drawing, for displaying the values for the variables n, M and P.
  • the pointer scales are expediently arranged side by side like the sizes P, n and M in the equation given above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
EP90906898A 1989-06-21 1990-05-14 Verfahren und vorrichtung zur regelung der drehzahl bei rührwerkskugelmühlen Expired - Lifetime EP0478566B2 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90906898T ATE99562T1 (de) 1989-06-21 1990-05-14 Verfahren und vorrichtung zur regelung der drehzahl bei ruehrwerkskugelmuehlen.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3920273A DE3920273A1 (de) 1989-06-21 1989-06-21 Verfahren und vorrichtung zur regelung der drehzahl bei ruehrwerkskugelmuehlen
DE3920273 1989-06-21
PCT/DE1990/000348 WO1990015665A1 (de) 1989-06-21 1990-05-14 Verfahren und vorrichtung zur regelung der drehzahl bei rührwerkskugelmühlen

Publications (3)

Publication Number Publication Date
EP0478566A1 EP0478566A1 (de) 1992-04-08
EP0478566B1 EP0478566B1 (de) 1994-01-05
EP0478566B2 true EP0478566B2 (de) 1996-09-25

Family

ID=6383221

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90906898A Expired - Lifetime EP0478566B2 (de) 1989-06-21 1990-05-14 Verfahren und vorrichtung zur regelung der drehzahl bei rührwerkskugelmühlen

Country Status (6)

Country Link
US (1) US5215263A (ja)
EP (1) EP0478566B2 (ja)
JP (1) JP2545001B2 (ja)
DE (2) DE3920273A1 (ja)
ES (1) ES2049032T5 (ja)
WO (1) WO1990015665A1 (ja)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19747628A1 (de) * 1997-10-29 1999-05-06 Bayer Ag Verfahren zur Füllstandsüberwachung bei Strahlmühlen und Prallmühlen
US6332582B1 (en) 1998-06-26 2001-12-25 Komatsu Ltd. Self-propelled crushing machine
SE523037C2 (sv) * 2000-11-02 2004-03-23 Sandvik Ab Sätt och anordning vid krossanläggning
DE10153430B4 (de) * 2001-10-30 2006-04-20 Kwade, Arno, Dr. Vorrichtung und Verfahren zum Zerkleinern und Dispergieren in einer Flüssigkeit suspendierter Partikel, zur Ermittlung der Zerkleinerungs- und Dispergiereigenschaften der Partikel und zur Bestimmung rheologischer Eigenschaften der Suspension
DE10333359B3 (de) 2003-07-23 2005-01-20 Vecoplan Maschinenfabrik Gmbh & Co. Kg Zerkleinerungsvorrichtung für Abfälle
DE102010012620A1 (de) 2010-03-24 2011-09-29 Siemens Aktiengesellschaft Verfahren zum Betrieb einer Mühle
CN102788612B (zh) * 2012-03-09 2014-12-17 山东理工大学 球磨机内部球石群及块状矿料动态分布检测系统及方法
CN102788611B (zh) * 2012-03-09 2014-11-19 山东理工大学 球磨机内部球石群及硬质块状矿料分布检测系统及方法
CN102788610B (zh) * 2012-03-09 2014-11-19 山东理工大学 球磨机内部球石群及矿料动态分布检测系统及方法
DE102014116239A1 (de) 2014-11-07 2016-05-12 Uts Biogastechnik Gmbh Verfahren zum Betreiben einer Rühreinrichtung und eines Fermenters
CN108940552B (zh) * 2018-08-26 2020-05-15 中国水利水电第七工程局有限公司 一种多破碎设备给料的pid控制系统

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT367657B (de) * 1978-08-24 1982-07-26 Buehler Ag Geb Ruehrwerkskugelmuehle-regelung
FI59824B (fi) * 1979-11-08 1981-06-30 Stroemberg Oy Ab Foerfarande foer reglering av traeslipmaskin med kolvmatning
DE3038794C2 (de) * 1980-10-14 1994-02-17 Buehler Ag Geb Rührwerksmühle
US4635858A (en) * 1981-01-09 1987-01-13 W. R. Grace & Co. Methods of operating ball grinding mills
US4404640A (en) * 1981-01-09 1983-09-13 W. R. Grace & Co. Grinding mill monitoring instrumentation
US4661911A (en) * 1985-01-31 1987-04-28 Beloit Corporation Adaptive constant refiner intensity control
CH667222A5 (de) * 1985-07-18 1988-09-30 Buehler Ag Geb Verfahren zum regeln einer ruehrwerksmuehle, und regelvorrichtung zur durchfuehrung des verfahrens.
DE3614980C1 (de) * 1986-05-02 1993-05-27 Draiswerke Gmbh Regelungseinrichtung fuer eine Ruehrwerksmuehle
US4709197A (en) * 1986-07-08 1987-11-24 Feinwerktechnik Schleicher & Co. Control device for driving e.g. a shredding machine or a similar machine

Also Published As

Publication number Publication date
JP2545001B2 (ja) 1996-10-16
DE3920273A1 (de) 1991-01-03
US5215263A (en) 1993-06-01
ES2049032T5 (es) 1997-01-16
WO1990015665A1 (de) 1990-12-27
EP0478566B1 (de) 1994-01-05
ES2049032T3 (es) 1994-04-01
EP0478566A1 (de) 1992-04-08
JPH04506028A (ja) 1992-10-22
DE59004158D1 (de) 1994-02-17

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