EP0734771A1 - Procédé de réglage automatique de la fente de broyage d'un concasseur à percussion et concasseur à percussion - Google Patents

Procédé de réglage automatique de la fente de broyage d'un concasseur à percussion et concasseur à percussion Download PDF

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Publication number
EP0734771A1
EP0734771A1 EP96103262A EP96103262A EP0734771A1 EP 0734771 A1 EP0734771 A1 EP 0734771A1 EP 96103262 A EP96103262 A EP 96103262A EP 96103262 A EP96103262 A EP 96103262A EP 0734771 A1 EP0734771 A1 EP 0734771A1
Authority
EP
European Patent Office
Prior art keywords
impact
impact mechanism
machine according
actuating cylinder
comminution machine
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.)
Withdrawn
Application number
EP96103262A
Other languages
German (de)
English (en)
Inventor
Wolfgang Finken
Hans-Jürgen Müller
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.)
ThyssenKrupp Foerdertechnik GmbH
Original Assignee
Krupp Foerdertechnik 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 Krupp Foerdertechnik GmbH filed Critical Krupp Foerdertechnik GmbH
Publication of EP0734771A1 publication Critical patent/EP0734771A1/fr
Withdrawn legal-status Critical Current

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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
    • B02C25/00—Control arrangements specially adapted for 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
    • B02C13/02—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft
    • B02C13/06—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft with beaters rigidly connected to the rotor
    • B02C13/09—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft with beaters rigidly connected to the rotor and throwing the material against an anvil or impact plate
    • B02C13/095—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft with beaters rigidly connected to the rotor and throwing the material against an anvil or impact plate with an adjustable anvil or impact plate
    • 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
    • B02C13/28—Shape or construction of beater elements
    • 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
    • B02C13/30—Driving mechanisms
    • 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
    • B02C13/31—Safety devices or measures

Definitions

  • the invention relates to a method for the automatic adjustment of the grinding gap of a comminution machine, which has a rotor with impact tools arranged on the circumference and a pivotally mounted impact device, the distance of which from the impact tools can be adjusted by pivoting the impact device until the impact tools are rotated while the rotor is running touched, after which the relevant impact mechanism position is detected as the zero position and the impact mechanism is then pivoted back by the path through which the desired target size of the grinding gap is achieved.
  • the invention further relates to a comminution machine, in particular an impact crusher, with at least one rotor provided with impact tools arranged on the circumference, which is rotatably mounted in a crusher housing and interacts with at least one impact mechanism which is arranged pivotably in the crusher housing and whose distance from the impact tools is adjustable, and with a measuring device, via which the position can be determined, in which the rotating impact tools slidably touch the pivoted-out impact system, and with a control for the predefinable grinding gap setting, which can be adjusted by pivoting the impact system back.
  • a comminution machine in particular an impact crusher, with at least one rotor provided with impact tools arranged on the circumference, which is rotatably mounted in a crusher housing and interacts with at least one impact mechanism which is arranged pivotably in the crusher housing and whose distance from the impact tools is adjustable, and with a measuring device, via which the position can be determined, in which the rotating impact tools slidably touch the pivoted-out impact system, and with
  • the space of the damping cylinder is preferably filled with a pressure fluid and connected to a reservoir, the pretensioning pressure of which can be varied, in order to adapt the damping characteristic to the respective intended use. Furthermore, in the impact crusher described in DE 35 25 101 A1, the possibility of movement of the impact mechanism in the direction of the rotor is positively limited by providing a stop on a rod guided out of the rear of the cylinder housing to limit the path of the impact mechanism in the direction of the rotor .
  • the vibrations of the impact mechanism are measured and that the zero position is registered when a predeterminable vibration threshold value is exceeded.
  • the invention is based on the basic idea that when the impact mechanism is turned in the direction of the rotor, the pivoting movement initially runs undisturbed until impacts are exerted on the impact mechanism when contact occurs between the impact mechanism and the rotating rotor that not only hinder the swiveling forward movement for a short time, but also cause brief return movements of the impact mechanism due to the pressure relief valve.
  • the vibration frequency of the impact device depends directly on the rotational frequency of the rotor and thus the number of impacts on the impact device which the impact tools exert.
  • the impact bars of the rotor which act as impact tools, have an uneven radial distance from the rotor axis of rotation.
  • the measurements of the vibrations of the impact mechanism allow a more precise determination of the location at which the distance of the impact mechanism from the impact tools on the rotor is zero. This zero position can be registered immediately, a pivoting movement of the impact mechanism being initiated by the distance that corresponds to the desired grinding gap at the same time as the registration movement.
  • the oscillation frequency and / or the oscillation amplitude are preferably measured.
  • the measurement of the frequency within the frequency response predetermined by the rotor frequency and the exceeding of an amplitude threshold value are reliable indicators for the impact of the impact tool of the rotor with the impact mechanism.
  • the vibrations are determined indirectly by measuring the pressure in a piston chamber of an actuating cylinder of the impact mechanism or directly by an external displacement sensor or an angle sensor integrated in the actuating cylinder.
  • the enumerated pressure, displacement or angle measurements can advantageously be made possible by integrated components on the impact mechanism; if necessary, these parts can also be retrofitted to comminution devices which have already been completed.
  • the present method is particularly suitable for hydraulically adjusted impact units.
  • the path of the piston rod of the actuating cylinder is limited by an adjustable, preferably hydraulically adjustable stop device.
  • This stop device has the advantage over the mechanical lock, which in principle represents a lock nut (see DE 35 25 101 A1), that the relative displacement of the piston rod, according to which the impact mechanism is pivoted, can be adjusted individually; in particular, the wear of the blow bars or different radial distances of the blow bars or other impact tools resulting from a rotor change can easily be taken into account.
  • the hydraulically adjustable stop device is preferably, in particular, remotely adjustable and can therefore be automated.
  • a comminution machine which according to the invention is characterized by a vibration measuring device which is connected directly or indirectly to the impact mechanism.
  • the vibration measuring device is preferably designed for determining frequency and amplitude values and is connected to a control device which serves for the respective regulation of the impact device position setting and with which other relevant measured variables, such as, for. B. the rotor frequency, can be detected and taken into account.
  • the vibration measuring device is a pressure sensor, which is arranged in a piston chamber or a feed line of an actuating cylinder of the impact mechanism.
  • the advantage of the integrated pressure sensor is its protected location. The pressure sensor enables the registration of pressure waves that occur when impacts are exerted on the impact mechanism, which are transmitted to the piston rod and ultimately to the pressure medium, such as hydraulic oil, in the actuating cylinder piston chamber.
  • the vibration measuring device consists of an external transducer or a displacement transducer integrated in the actuating cylinder or a rotary angle meter which is arranged on the swivel joint of the impact mechanism.
  • Hydraulic cylinders with displacement transducers for determining the respective piston position are known in principle from the prior art, as are rotary angle meters, which can be implemented, for example, as angle encoders.
  • the angular position sensors, like displacement transducers work wear-free and have a high resolution accuracy and reliability. In particular, incorrect controls, as can occur in an "acoustic ear" realized by a microphone according to EP 0 391 096 B1, are excluded.
  • the impact mechanism is preferably hydraulically adjustable.
  • an individual end stop can be adjusted, possibly remotely, via a clamping head, which limits the piston extension path and thus the pivoting path of the impact mechanism.
  • the clamping head is preferably connected to the actuating cylinder acting as a damping cylinder.
  • the clamping head fixes a safety rod, which is designed with its end head as a stop for the piston rod of the actuating cylinder.
  • the clamping head and / or the securing rod can be actuated hydraulically.
  • the clamping head, the securing rod and / or the piston rod can be actuated via one and the same hydraulic control circuit, which considerably minimizes the number of components required.
  • a preload valve in the pressure line is used to prevent this advance, which is connected to the corresponding piston chamber of the actuating cylinder.
  • the impact mechanism is preferably articulated to the piston rod of an actuating cylinder, which is supported on the crusher housing and in which the front end position of the piston rod is infinitely adjustable via the adjusting piston of an actuating cylinder designed as a securing rod.
  • the impact mechanism actuator can be implemented in a very small space.
  • the piston chamber of the actuating cylinder is preferably filled with a pressure fluid and connected to a reservoir, the pretensioning pressure of which can be changed to limit the maximum refractive power.
  • the maximum pressure forces in the piston chamber are limited by a remote-controlled pressure relief valve.
  • the piston chamber is secured by a pressure limiting valve, the control circuit of which is designed to be leak-free, so that the hydraulic pump can be switched off after the grinding gap has been set, preferably until a pressure sensor in the control circuit reports a pressure drop and the hydraulic pump is reactivated.
  • a memory can be provided in the control circuit to fill up minor leaks.
  • the actuating cylinder is preferably designed as a differential cylinder.
  • the securing rod is sealed in each case by the clamping device into the actuating cylinder piston chamber and through the rear of the actuating piston designed as a hollow piston, where the head of the Support safety rod against the annular cylinder bottom surface of the cavity of the actuating piston.
  • This type of stop safety device is remotely adjustable with one and the same hydraulic circuit with regard to the relative position of the stop safety device.
  • the crushing device according to FIG. 1 is an impact crusher, which in a crusher housing 10 has a rotor 12 equipped with baffle strips 11 in a rotatable mounting.
  • the abandoned crushed material is thrown by the baffle bars 11 against an impact mechanism 13 that is reinforced with plates 14 on the side facing the rotor.
  • the impact mechanism 13 is pivotally mounted about an axis of rotation 15 and can be pivoted via a piston rod 16 which is connected to the impact mechanism 13 via the joint 17.
  • the piston rod 16 has a piston cavity 18 into which the head 19 of a securing rod 20 projects, the head 19 of this securing rod being supported on or against the annular cylinder bottom surface 21 of the said cavity 18.
  • the securing rod 20 acts with a clamping device 22 which is connected to the actuating cylinder 23.
  • the piston rod 16 is guided in an actuating cylinder 23, its position being adjustable by feeding or removing a hydraulic medium into the piston chambers 25 and 26, which is on both sides of the piston block 24 lie, which is guided sealed in the differential piston.
  • the cylinder space 26 is designed as an annular cylinder space.
  • the securing rod 20 is passed through both the piston block 24 and the rear floor 27 of the piston chamber 25 in a sealed manner.
  • the clamping device 22 has an annular cylinder space 28, by means of the pressurization of which the adjusting block 29 of the clamping device can be moved against the spring 47.
  • the securing rod 20 has a through hole 30 through which the hydraulic medium can be fed into or out of the space 18.
  • a pressure sensor 31 is arranged, which is connected to a control device for the hydraulic circuit via control lines, not shown.
  • This hydraulic control circuit has a reservoir 32, from which hydraulic fluid can be pumped 33.
  • the piston rod 16 extends at a low speed, for example by means of a proportional directional control valve.
  • the impact mechanism 13 or the reinforcement 14 comes into contact with the impact strips, the impact movements exerted via the piston rod 16 are transmitted to the piston chamber 25 in the form of pressure waves.
  • the pressure waves there depend on the speed of the rotor, the number of baffle bars 11 and also on the radial distance between them Have baffle bars each to the rotor axis.
  • the pressure pulses are detected by a pressure sensor 31 and evaluated by a computer or an electronics unit by determining the frequency and the amplitude.
  • the instantaneous position of the impact mechanism 13 is stored in the electronics unit as the zeroing gap position.
  • the desired grinding gap is set by swiveling back the impact mechanism 13, ie retracting the adjusting piston 16.
  • the valve 35 is brought into the left switching position and the valve 37 is switched, whereby the cylinder spaces 26 and 18 are pressurized.
  • the piston rod 16 is retracted, the securing rod 20 is extended.
  • the valve 34 is switched, whereby the mechanical clamping of the clamping device 22 is released.
  • the valve 34 When the crushing gap setting is reached, the valve 34 is switched off and the mechanical clamping is closed again.
  • the piston chamber 25 is then pressurized via the valves 38 and 39, the pressure being infinitely adjustable by means of the valve 40.
  • This pressure also determines the set pressure of the pressure relief valve 41 and limits the maximum refractive power.
  • the piston rod 16 is fixed in the extension direction by the securing rod 20 and hydraulically pretensioned in the other direction, so that the piston rod is locked. If the refractive power exceeds the set pressure of the pressure limiting valve 41, this is opened, after which the hydraulic medium can flow from the cylinder chamber 25 via the check valve 42 into the cylinder chamber 26, any excess quantities of the hydraulic medium flow back via the check valve 43 into the reservoir 32.
  • the position of the safety rod 20 remains unchanged.
  • the desired impact mechanism setting can be carried out immediately and at a high level Speed can be restarted; it is not possible to drive past the preset grinding gap setting, since the safety rod or its head blocks further movement in this regard.
  • valve 41 and its control are leak-free, which means that the hydraulic pump in question can be switched off after the setting has been made.
  • Valves 38 and 39 must always be in an energized position during breaking.
  • a pressure drop 45 in the hydraulic control circuit, which activates the hydraulic pump and the valves described, is determined via a pressure switch 45.
  • a memory 46 is provided to compensate for any minor leaks.
  • the piston chamber 25 of the actuating cylinder 23 is filled with a pressure fluid and connected to the accumulator 48, the prestressing pressure of which can be changed to limit the maximum refractive power.
  • the actuating cylinder 23 which is designed as a differential piston, can also be provided with a travel meter, which detects the absolute position of the piston rod 16 as a function of time and registers both the forward movements made when the piston rod 16 is extended and by striking the baffle bars on the impact mechanism 13 caused backward movements, after their first appearance the associated piston rod position 16 is stored as the zero point position.
  • the respective time-dependent position of the impact mechanism can also be determined directly on the swivel joint 15 using a rotary angle meter.
  • the present invention also includes embodiments in which the pressure sensor 31 and the above-described displacement sensor or the measurement of the angle of rotation are implemented side by side, which increases the operational reliability accordingly.
  • an external displacement measuring device can also be used.
  • Such measuring devices are particularly suitable for retrofitting impact crushers that do not have an internal position measuring system.
  • a high structural and / or control expenditure such as. B. when using a microphone, avoid. Operating errors, which may result in destruction of the impact mechanism or the rotor, are excluded.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Disintegrating Or Milling (AREA)
EP96103262A 1995-03-25 1996-03-02 Procédé de réglage automatique de la fente de broyage d'un concasseur à percussion et concasseur à percussion Withdrawn EP0734771A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19511097A DE19511097C1 (de) 1995-03-25 1995-03-25 Verfahren zur automatischen Einstellung des Mahlspaltes einer Zerkleinerungsmaschine und Zerkleinerungsmaschine
DE19511097 1995-03-25

Publications (1)

Publication Number Publication Date
EP0734771A1 true EP0734771A1 (fr) 1996-10-02

Family

ID=7757806

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96103262A Withdrawn EP0734771A1 (fr) 1995-03-25 1996-03-02 Procédé de réglage automatique de la fente de broyage d'un concasseur à percussion et concasseur à percussion

Country Status (14)

Country Link
US (1) US5718389A (fr)
EP (1) EP0734771A1 (fr)
JP (1) JPH08266921A (fr)
KR (1) KR960033553A (fr)
AU (1) AU697123B2 (fr)
BR (1) BR9601114A (fr)
CA (1) CA2171501A1 (fr)
CZ (1) CZ285256B6 (fr)
DE (1) DE19511097C1 (fr)
HU (1) HUP9600723A3 (fr)
MX (1) MX9601100A (fr)
PL (1) PL313405A1 (fr)
TW (1) TW326409B (fr)
ZA (1) ZA962302B (fr)

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ES2185436B1 (es) * 1999-10-21 2004-10-01 Ismael Ibañez Martin Sistema de regulacion automatica de la granulometria para molinos de aridos o minerales.
US6502774B1 (en) 2000-03-08 2003-01-07 J + L Fiber Services, Inc. Refiner disk sensor and sensor refiner disk
US6752165B2 (en) 2000-03-08 2004-06-22 J & L Fiber Services, Inc. Refiner control method and system
US6778936B2 (en) 2000-03-08 2004-08-17 J & L Fiber Services, Inc. Consistency determining method and system
US6938843B2 (en) 2001-03-06 2005-09-06 J & L Fiber Services, Inc. Refiner control method and system
KR100871307B1 (ko) * 2001-07-27 2008-12-01 가부시키가이샤 고마쓰 세이사쿠쇼 파쇄장치, 그의 간격조정장치 및 이들을 탑재한 이동식파쇄기
JP4022406B2 (ja) * 2001-08-27 2007-12-19 株式会社小松製作所 インパクトクラッシャの隙間調整装置の制御方法およびその隙間調整装置
FR2837407B1 (fr) * 2002-03-21 2004-05-28 Metso Minerals Macon Sa Systeme de positionnement du rotor et d'indexation d'un broyeur a percussion
DE102004005378B4 (de) * 2004-02-03 2015-10-15 Hermann Schrödl Einrichtung und Verfahren zur Einstellung von Brechwerkzeugen
ITTO20040211A1 (it) * 2004-03-30 2004-06-30 Ohg Di Ponzano Vene To Spa Macchina frantumatrice di pietrisco e affini
US7104480B2 (en) * 2004-03-23 2006-09-12 J&L Fiber Services, Inc. Refiner sensor and coupling arrangement
FI20040734A (fi) * 2004-05-31 2005-12-01 Raumaster Oy Murskain, sen käyttö ja menetelmä kiintoaineen murskauksessa
US7229041B2 (en) * 2004-06-30 2007-06-12 Ohio Central Steel Company Lifting lid crusher
US7360725B2 (en) * 2004-08-31 2008-04-22 Johnson Industries, Inc. Material crusher
ITTV20060050A1 (it) * 2006-03-28 2007-09-29 Officine Meccaniche Di Ponzano Veneto S P A Macchina per la frantumazione di pietrisco ed affini e relativo metodo di funzionamento.
FR2912934B1 (fr) * 2007-02-28 2009-04-24 Krupp Hazemag Soc Par Actions Machine a percussion pour le concassage et/ou le broyage de matieres minerales comportant des moyens de reglage automatises
SE534783C2 (sv) * 2010-04-16 2011-12-20 Sandvik Intellectual Property Slagkross med horisontell axel
DE102010015583B4 (de) 2010-04-19 2018-07-19 Kleemann Gmbh Verfahren zur Einstellung eines Arbeitsspaltes zwischen einer Prallschwinge und dem Schlagkreis eines Rotors
FI20105899A (fi) 2010-08-30 2012-03-01 Ecomeca Oy Menetelmä ja laite mineraalimateriaalin murskaamiseksi
US9457353B2 (en) 2013-01-31 2016-10-04 Orlando Utilities Commission Coal pulverizer monitoring system and associated methods
US10279354B2 (en) * 2014-10-24 2019-05-07 Mclanahan Corporation Impact crusher and curtain adjustment system
DE102015224104A1 (de) 2015-12-02 2017-06-08 Thyssenkrupp Ag Verfahren zur Einstellung eines Brechspalts
US10960400B2 (en) * 2017-04-26 2021-03-30 Kolberg-Pioneer, Inc. Apparatus and method for an apron return assembly
CN107975514B (zh) * 2017-12-27 2023-10-03 江苏徐工工程机械研究院有限公司 油缸和破碎机
CN110075964A (zh) * 2019-05-13 2019-08-02 南通诺博特机器人制造有限公司 一种粒径可调粗细一体式破碎机
CN115138437B (zh) * 2021-03-31 2023-08-29 北京加隆工程机械有限公司 一种建筑垃圾破碎装置
EP4282534A1 (fr) * 2022-05-24 2023-11-29 Sandvik Ltd Concasseur à impact à arbre horizontal

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DE3525101A1 (de) * 1985-07-13 1987-01-15 Orenstein & Koppel Ag Prallbrecher
EP0391096A2 (fr) * 1989-04-07 1990-10-10 NOELL Service und Maschinentechnik GmbH Procédé de réglage automatique de la fente de broyage, déterminant la granulométrie, d'une machine de broyage et dispositif pour la mise en oeuvre du procédé
EP0513479A1 (fr) * 1991-05-17 1992-11-19 Krupp Fördertechnik GmbH Concasseur à percussion et procédé de réglage de son interstice de travail

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Publication number Priority date Publication date Assignee Title
DE3525101A1 (de) * 1985-07-13 1987-01-15 Orenstein & Koppel Ag Prallbrecher
EP0391096A2 (fr) * 1989-04-07 1990-10-10 NOELL Service und Maschinentechnik GmbH Procédé de réglage automatique de la fente de broyage, déterminant la granulométrie, d'une machine de broyage et dispositif pour la mise en oeuvre du procédé
EP0513479A1 (fr) * 1991-05-17 1992-11-19 Krupp Fördertechnik GmbH Concasseur à percussion et procédé de réglage de son interstice de travail

Also Published As

Publication number Publication date
HU9600723D0 (en) 1996-05-28
PL313405A1 (en) 1996-09-30
CZ78196A3 (en) 1996-10-16
HUP9600723A3 (en) 2000-03-28
BR9601114A (pt) 1998-01-06
ZA962302B (en) 1997-09-22
CA2171501A1 (fr) 1996-09-26
DE19511097C1 (de) 1996-07-11
MX9601100A (es) 1997-02-28
HUP9600723A2 (hu) 1999-06-28
US5718389A (en) 1998-02-17
KR960033553A (ko) 1996-10-22
TW326409B (en) 1998-02-11
JPH08266921A (ja) 1996-10-15
AU697123B2 (en) 1998-09-24
CZ285256B6 (cs) 1999-06-16
AU4816696A (en) 1996-10-03

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