DE102009057732A1 - Method for crushing ground stock, involves measuring rotational speed at each grinding roller and at grinding plate, where grinding roller is radially displaced on grinding plate - Google Patents
Method for crushing ground stock, involves measuring rotational speed at each grinding roller and at grinding plate, where grinding roller is radially displaced on grinding plate Download PDFInfo
- Publication number
- DE102009057732A1 DE102009057732A1 DE200910057732 DE102009057732A DE102009057732A1 DE 102009057732 A1 DE102009057732 A1 DE 102009057732A1 DE 200910057732 DE200910057732 DE 200910057732 DE 102009057732 A DE102009057732 A DE 102009057732A DE 102009057732 A1 DE102009057732 A1 DE 102009057732A1
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- Germany
- Prior art keywords
- grinding
- driven
- roller
- rollers
- rotational speed
- 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.)
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Classifications
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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
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C15/04—Mills with pressed pendularly-mounted rollers, e.g. spring pressed
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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
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C15/006—Ring or disc drive gear arrangement
-
- 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
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren und eine Vertikal-Rollenmühle zum effektivem und leistungsoptimiertem Betrieb einer Vertikal-Rollenmühle zum Zerkleinern von Mahlgut.The invention relates to a method and a vertical roller mill for the effective and performance-optimized operation of a vertical roller mill for the comminution of regrind.
Vertikal-Rollenmühlen bekannter Art haben einen zentralen Mahlteller mit einem vertikalen Mahltellerantrieb und eine oder vorzugsweise mehrere nicht angetriebene Mahlrollen, die auf dem Mahlteller abrollen und zugeführtes Mahlgut durch Überrollen zerkleinern. Mahlkräfte werden durch mechanische Federn oder durch hydropneumatische Federn über die Mahlrollen ins System eingebracht.Vertical roller mills of known type have a central grinding table with a vertical grinding table drive and one or preferably a plurality of non-driven grinding rollers which roll on the grinding table and comminute supplied grinding stock by rolling over. Grinding forces are introduced into the system via mechanical rollers or hydropneumatic springs via the grinding rollers.
Es sind auch Vertikal-Rollenmühlen mit Rollenantrieben und teilweise mit unterstützenden Mahltellerantrieb (
Der Erfindung liegt die Erkenntnis zu Grunde, das alle zusätzlichen Leistungsforderungen des Rollenmühlen-Systems darin begründet liegen, das durch Drehzahlschwankungen an den einzelnen Mahlrollen diese beschleunigt oder abgebremst werden. Die Drehzahlschwankungen der Mahlrollen beruhen darauf, das eine Friktionspunktverschiebung zwischen Mahlteller und jeder einzelnen Mahlrolle in der Mahlgutschüttung, der Mahlguthomogenität, und der Mahlgutverteilung vor bzw. unter der Mahlrolle begründet ist. Zusätzlich erfolgt eine Friktionspunktverschiebung besonders stark durch die Kinematik der Rollenführung und der Rollenlagerung, wobei berücksichtigt werden muss, dass die Mahlrolle eine endliche Breite besitzt während der Friktionspunkt den Kreuzungspunkt zweier Linien in einer Ebene darstellt, der jedoch nur rein theoretisch zu ermitteln ist.The invention is based on the knowledge that all additional performance requirements of the roller mill system are due to the fact that these are accelerated or decelerated by speed fluctuations on the individual grinding rollers. The speed variations of the grinding rollers are based on the fact that a friction point shift between the grinding plate and each individual grinding roller in the Mahlgutschüttung, the Mahlguthomogenität, and the Mahlgutverteilung before or below the grinding roller is justified. In addition, a friction point shift takes place particularly strongly by the kinematics of the roller guide and the roller bearing, whereby it must be taken into account that the grinding roller has a finite width while the friction point represents the crossing point of two lines in a plane, which, however, can only be determined purely theoretically.
Aus diesen Erkenntnissen leitet sich die Aufgabenstellung der Erfindung ab, ein Verfahren und eine Vorrichtung anzugeben, die es ermöglichen, eine Leistungsoptimierung einer Vertikal-Rollenmühle durch eine Leistungsoptimierung an jeder einzelnen Mahlrolle durchzuführen, indem das Übersetzungsverhältnis (i) der Mahlrolle zum Mahlteller durch Verschiebung des Friktionspunktes zeitlich annähernd konstant gehalten wird.From these findings, the task of the invention is derived to provide a method and an apparatus which make it possible to perform a performance optimization of a vertical roller mill by optimizing the performance of each individual grinding roller by the gear ratio (i) of the grinding roller to the grinding table by shifting the Friction point is kept approximately constant in time.
Erfindungsgemäß wird diese Aufgabe durch die Merkmale der Ansprüche 1 bis 7 gelöst.According to the invention this object is solved by the features of
Das Verfahren zur Zerkleinerung von Mahlgut auf Vertikal-Rollenmühlen erfordert erfindungsgemäß eine Vertikal-Rollenmühle mit einem Mahlteller mit vertikaler Achse, mit der Mahltellerlagerung, mit einer bis mehreren Mahlrollen, mit einem Mahlteller-Hauptantrieb oder Mahlteller-Hilfsantrieb mit Antrieben für eine, mehreren oder allen vorhandenen Mahlrollen. An jeder Mahlrolle und am Mahlteller sind Drehzahlmessungen angeordnet. Im Mahlbetrieb wird für jede Mahlrolle das Übersetzungsverhältnis (i) Drehzahl Mahlteller zu der Drehzahl Mahlrolle ermittelt und mit einer Regelung individuell konstant gehalten, indem die Mahlrolle auf dem Mahlteller radial verschoben wird, sodass durch eine Drehzahländerung an der Mahlrolle das Übersetzungsverhältnis (i) zwischen Mahlteller und Mahlrolle einstellbar konstant wird. Durch das radiale Verschieben der Mahlrolle auf dem Mahlteller werden unnötige Drehbeschleunigungen oder Drehverzögerungen an den Mahlrollen abgebaut bzw. ganz verhindert.According to the invention, the method of comminuting material to be ground on vertical roller mills requires a vertical roller mill with a vertical axis grinding table, with the grinding table support, with one or more grinding rollers, with a main grinding table drive or auxiliary grinding drive with drives for one, several or all existing grinding rolls. Speed measurements are arranged on each grinding roller and on the grinding table. In the grinding operation, the gear ratio (i) speed grinding plate to the speed grinding roller is determined and individually held constant by a control by the grinding roller is displaced radially on the grinding table, so that by a speed change to the grinding roller, the transmission ratio (i) between the grinding table and Mahlrolle adjustable becomes constant. By the radial displacement of the grinding roller on the grinding table unnecessary spin or decelerations on the grinding rollers are reduced or completely prevented.
Beim dem erfindungsgemäßem Verfahren wird kein Abgleich einzelner Mahlrollen zueinander benötigt. Die gesamte additive Leistungsaufnahme der Vertikal-Rollenmühle mit angetriebenen Mahlrollen wird gemäß dem Materialdurchsatz und dem Mahlergebnis optimiert. Das Verfahren ist für Vertikal-Rollenmühlen mit Rollenantrieben einsetzbar, wobei der Mahlteller zusätzlich einen Zentralantrieb oder einen Hilfsantrieb besitzen kann. Das Verfahren optimiert nicht nur die Leistungsaufnahme und Leistungsfähigkeit der Vertikal-Rollenmühle, sondern wirkt auch verschleißmindernd auf die Maschinenkomponenten Mahlteller und Mahlrolle.In the method according to the invention, no adjustment of individual grinding rollers to one another is required. The total additive power consumption of the vertical roller mill with driven grinding rollers is optimized according to the material throughput and the grinding result. The method can be used for vertical roller mills with roller drives, wherein the grinding table can additionally have a central drive or an auxiliary drive. The process not only optimizes the power consumption and performance of the vertical roller mill, but also reduces wear on the machine components grinding table and grinding roller.
Die Erfindung wird an dem Beispiel gemäß der Zeichnung nach
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 19702854 A1 [0003] DE 19702854 A1 [0003]
- DE 102007041878 A1 [0003] DE 102007041878 A1 [0003]
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200910057732 DE102009057732A1 (en) | 2009-12-10 | 2009-12-10 | Method for crushing ground stock, involves measuring rotational speed at each grinding roller and at grinding plate, where grinding roller is radially displaced on grinding plate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200910057732 DE102009057732A1 (en) | 2009-12-10 | 2009-12-10 | Method for crushing ground stock, involves measuring rotational speed at each grinding roller and at grinding plate, where grinding roller is radially displaced on grinding plate |
Publications (1)
Publication Number | Publication Date |
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DE102009057732A1 true DE102009057732A1 (en) | 2011-06-16 |
Family
ID=43992762
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE200910057732 Withdrawn DE102009057732A1 (en) | 2009-12-10 | 2009-12-10 | Method for crushing ground stock, involves measuring rotational speed at each grinding roller and at grinding plate, where grinding roller is radially displaced on grinding plate |
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DE (1) | DE102009057732A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014020079A3 (en) * | 2012-08-01 | 2014-04-10 | Thyssenkrupp Resource Technologies Gmbh | Roller mill and method for milling material to be milled by means of a roller mill |
WO2014111176A1 (en) * | 2013-01-16 | 2014-07-24 | Siemens Aktiengesellschaft | Drive control method and drive system operating according to said method |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19702854A1 (en) | 1997-01-27 | 1998-07-30 | Krupp Polysius Ag | Vertical axis mill for grinding mineral materials |
DE102007041878A1 (en) | 2007-09-04 | 2009-03-05 | Polysius Ag | Process and roller mill for the comminution of regrind |
-
2009
- 2009-12-10 DE DE200910057732 patent/DE102009057732A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19702854A1 (en) | 1997-01-27 | 1998-07-30 | Krupp Polysius Ag | Vertical axis mill for grinding mineral materials |
DE102007041878A1 (en) | 2007-09-04 | 2009-03-05 | Polysius Ag | Process and roller mill for the comminution of regrind |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014020079A3 (en) * | 2012-08-01 | 2014-04-10 | Thyssenkrupp Resource Technologies Gmbh | Roller mill and method for milling material to be milled by means of a roller mill |
CN104755171A (en) * | 2012-08-01 | 2015-07-01 | 蒂森克虏伯工业解决方案股份公司 | Roller mill and method for milling material to be milled by means of roller mill |
US9868122B2 (en) | 2012-08-01 | 2018-01-16 | Thyssenkrupp Industrial Solutions Ag | Roller mill and method for milling material to be milled by means of a roller mill |
CN104755171B (en) * | 2012-08-01 | 2018-07-20 | 蒂森克虏伯工业解决方案股份公司 | Roller mill and the method that material to be ground is crushed using roller mill |
WO2014111176A1 (en) * | 2013-01-16 | 2014-07-24 | Siemens Aktiengesellschaft | Drive control method and drive system operating according to said method |
CN104918707A (en) * | 2013-01-16 | 2015-09-16 | 西门子公司 | Drive control method and drive system operating according to said method |
US10118181B2 (en) | 2013-01-16 | 2018-11-06 | Siemens Aktiengesellschaft | Drive control method and drive system operating according to said method |
US10556238B2 (en) | 2013-01-16 | 2020-02-11 | Siemens Aktiengesellschaft | Drive control method and drive system operating according to said method |
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R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |