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WO2002036264A9 - Disposition et commande d'une installation de concassage - Google Patents

Disposition et commande d'une installation de concassage

Info

Publication number
WO2002036264A9
WO2002036264A9 PCT/SE2001/002398 SE0102398W WO0236264A9 WO 2002036264 A9 WO2002036264 A9 WO 2002036264A9 SE 0102398 W SE0102398 W SE 0102398W WO 0236264 A9 WO0236264 A9 WO 0236264A9
Authority
WO
WIPO (PCT)
Prior art keywords
crusher
coupling
crushing plant
rpm
crushing
Prior art date
Application number
PCT/SE2001/002398
Other languages
English (en)
Other versions
WO2002036264A1 (fr
Inventor
Aake Persson
Original Assignee
Svedala Mobile Equipment Ab
Aake Persson
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 Svedala Mobile Equipment Ab, Aake Persson filed Critical Svedala Mobile Equipment Ab
Priority to EP01979201A priority Critical patent/EP1341613B1/fr
Priority to DE60137256T priority patent/DE60137256D1/de
Priority to AU2002211186A priority patent/AU2002211186A1/en
Publication of WO2002036264A1 publication Critical patent/WO2002036264A1/fr
Publication of WO2002036264A9 publication Critical patent/WO2002036264A9/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
    • 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
    • B02C1/00—Crushing or disintegrating by reciprocating members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C2/00—Crushing or disintegrating by gyratory or cone crushers
    • 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

Definitions

  • the present invention concerns a crushing plant, which comprises a crusher and a drive unit driving the crusher.
  • the invention also concerns a method of monitoring the operation of a crushing plant which comprises a crusher and a drive unit driving the crusher.
  • control system is often used to increase the effectiveness of the crusher.
  • ASR PlusTM which is marketed by Svedala-Arbra AB, SE, and which is described in
  • This control system is suitable for the control of gyratory crushers, for example, and has as input signals both the pressure and position of the crusher's crushing shaft and also a signal from a converter which measures the current consumption of a motor which drives the crusher.
  • the crusher's crushing shaft is adjusted vertically, thus adjusting the crusher's crushing setting, in such a way that the crusher continuously gives the greatest possible production of crushed material while the size distribution is permitted to vary slightly.
  • the drive motor is not an electric motor or is an electric motor which, in addition to the crusher also drives some other device, the control system cannot obtain sufficient information to be able to control the crusher.
  • US 5 803 376 describes a method of controlling a mobile crusher.
  • the crusher is driven by an hydraulic motor and the motor's hydraulic fluid pressure and flow rate are measured. The measured values can then give a measure of the power which the hydraulic motor develops. It is also suggested that the rpm of the output shaft of the hydraulic motor is measured.
  • This method has the disadvantage that measurement of the load on the crusher is impossible if the motor is of a type other than hydraulic, or if the hydraulic motor also drives some other component in addition to the crusher.
  • the object of the present invention is therefore to provide a crushing plant in which a drive unit of arbitrary type can be used and which has a device for the reliable measurement of the load on a crusher, no matter what type of drive unit is used.
  • the drive unit is selected from a group which consists of internal combustion engines and hydraulic motors.
  • Internal combustion engines have the advantage that they are independent of a mains electricity supply. It is thus possible to use the crushing plant in places where there is no access to a mains electricity supply.
  • Particularly suitable as a drive unit is a diesel engine. Diesel engines have several advantages: the fuel is relatively inexpensive and easy to handle and the engines are robust and provide a high torque even at a relatively low, constant rpm.
  • the coupling is preferably an hydraulic slipping coupling. A major advantage of a slipping hydraulic coupling is that it slips if the crusher stalls, so that the input shaft to the coupling can continue to rotate even though the crusher and the coupling's output shaft are stationary.
  • the measuring device is arranged to measure a first rpm with a first measuring unit, which rpm is representative for an input shaft to the coupling, and a to measure a second rpm with a second measuring unit, which rpm is representative for the output shaft.
  • first measuring unit which rpm is representative for an input shaft to the coupling
  • second measuring unit which rpm is representative for the output shaft.
  • the coupling's input shaft and the coupling's output shaft will rotate at slightly different rpms .
  • the difference in rpms depends on the load under which the crusher is operating at that particular instant. The larger the difference in rpms, the greater the power which is transmitted to the crusher.
  • the measuring units which are used to measure rpms are inexpensive and give very reliable measurement data.
  • the slipping coupling has a first blade wheel and a second blade wheel, said blade wheels being separated by a gap, said first measuring unit being arranged to measure the rpm of the first blade wheel and said second measuring unit being arranged to measure the rpm of the second blade wheel.
  • Slipping couplings usually incorporate at least two blade wheels, which are also known as impellers, wheels, rotors, etc.
  • the housing of the slipping coupling and also the gap between the blade wheels contain hydraulic fluid. The viscosity of the hydraulic fluid and the gap result in a tendency for the first blade wheel, which is powered by the drive unit, to pull the second blade wheel around with it.
  • a display device is arranged to show at least one value in a group of values which consists of the determined torque, a power calculated from the determined torque, a measured first rpm and a measured second rpm.
  • the display of the values mentioned above gives an operator information about conditions in the crusher. The operator can then adjust the crusher so that the greatest possible production of crushed material is obtained within the limits prescribed for the values mentioned above. The operator can also discover faults in the crushing plant and the components which feed material and the operator also obtains an indication when the characteristics of the fed material change with respect to hardness and size, for example.
  • the crushing plant preferably has a control system which is intended to control the operation of the crusher in accordance with the determined torque.
  • the control system makes it possible to obtain, without manual supervision, the maximum possible production of crushed material with as even a size distribution as possible.
  • the control strategy can for example include the following parameters: The rate at which material is fed, the size of the fed material which arrives after crushing in a foregoing stage, the crusher's rpm, the crusher's crushing setting, etc.
  • the control system can also incorporate alarm and emergency stop functions for the avoidance of injury to personnel and damage to equipment.
  • the position sensor measures the position of the crusher's crushing shaft and indirectly the crushing setting
  • the pressure sensor measures the pressure which affects the crusher's crushing shaft in the vertical direction, to prevent the crushing shaft from assuming an incorrect position with respect to the crusher's fixed outer crushing mantle.
  • the crushing plant is a mobile crushing plant.
  • mobile crushing plants it is sometimes desirable to connect to the coupling an external drive unit of arbitrary type and which is at the site to which the mobile crushing plant has been transported.
  • mobile crushing plants are equipped with diesel engines due to a lack of access to a mains electricity supply at the site in question. These diesel engines often drive also other power consumers via a gearbox arranged between the engine and the coupling.
  • the object of the present invention is also to provide a method of monitoring the operation of a crushing plant, a method which is applicable with an arbitrary type of drive unit and gives reliable measurement of the crusher's load, irrespective of the type of drive unit used.
  • This object is achieved with the help of a method of monitoring the operation of a crushing plant which comprises a crusher and a drive unit driving the crusher, said method being characterized by a coupling being driven by the drive unit, by the crusher being driven by an output shaft from the coupling and by the torque transmitted to the crusher by the output shaft being determined by a measuring device.
  • the coupling is an hydraulic slipping coupling and the drive unit is a diesel engine, and a first rpm, which is representative for the input shaft to the coupling, and a second rpm, which is representative for the output shaft, are measured.
  • crushing plants which have hydraulic slipping couplings driven by diesel engines are robust .
  • diesel engines are reliable and are not dependent on a mains electricity supply since they use a relatively easily handled fuel and on the other hand hydraulic slipping couplings facilitate starting and stopping procedures and reduce the risk of damage to engines and transmissions and injury to personnel, etc. Rpm measurement can be accomplished with high accuracy and reliability.
  • the torque transmitted to the crusher by the output shaft can conveniently be determined from the measured rpms and a calibration curve for the coupling. This determination can be made with high precision and in real time, thus permitting the optimisation of the crusher for a very high output of crushed material per unit of time within the size limits which have been established for the crushed material .
  • the crusher is a gyratory crusher, with a control system used to control the crusher's crushing setting with the help of the determined torque and signals from pressure and position sensors arranged on the crusher.
  • control of the crusher's crushing setting makes it possible to optimise the operation of a gyratory crusher.
  • FIG. 1 is a schematic representation of a crushing plant according to the present invention.
  • Fig. 2 shows a gyratory crusher which is incorporated in the crushing plant .
  • Fig. 3 is a schematic representation of an hydraulic slipping coupling which is incorporated in the crushing plant .
  • Fig. 4 shows a measuring device which is mounted on the slipping coupling shown in Fig. 3.
  • Fig. 5 shows a calibration curve for the slipping coupling.
  • Fig. 1 a crushing plant 1.
  • the crushing plant 1 has a drive unit 2 in the form of a diesel engine.
  • the diesel engine 2 drives a shaft 3, which passes through a gearbox 4 and drives an hydraulic slipping coupling 5.
  • the gearbox 4 is arranged to split power from the shaft 3 to a number of components which are incorporated in the crushing plant 1 but are not shown.
  • the shaft 3 forms the input shaft to the slipping coupling 5.
  • the slipping coupling 5 also has an output shaft 6 which, through a transmission 7 and a shaft 8, drives a gyratory crusher
  • a first rpm VI which is representative for the input shaft 3 of the slipping coupling 5, is measured by an inductive first sensor 12.
  • the first sensor 12 is arranged to measure the rpm of the first blade wheel 13 of the slipping coupling 5.
  • Other rpms which are representative for the shaft 3 can also be measured.
  • a sensor can be placed in any of several alternative positions 12'.
  • a second rpm V2 which is representative for the output shaft 6 of the slipping coupling 5, is measured by an inductive second sensor 14.
  • the second sensor 14 is arranged to measure the rpm of the second blade wheel 15 of the slipping coup- ling 5.
  • Other rpms which are representative for the shaft 6 can also be measured.
  • a sensor can be placed in any of several alternative positions 14'.
  • the signals from the first sensor 12 and the second sensor 14 are received by a calculating device 16.
  • the calculating device 16 utilizes a calibration curve K which applies for the slipping coupling 5 and the hydraulic fluid used. With the help of the rpms VI and V2 and the curve K, the calculating device 16 can calculate the torque M which is currently transmitted to the crusher 9 by the slipping coupling 5.
  • the gyratory crusher 9 has a pressure sensor 17 and a position sensor 18, which are shown schematically in Fig. 2.
  • the signals 17' and 18' from the sensors 17 and 18 respectively are processed in the collecting device 19.
  • Fig. 3 shows a cross-section of the hydraulic slipping coupling 5.
  • the shaft 3 is fixedly connected to a flange 31 which in turn is fixedly connected to the first blade wheel 13 and can thus rotate the first blade wheel 13.
  • hydraulic fluid is continuously introduced to the slipping coupling 5 through an inlet I.
  • the hydraulic fluid is then led between the first blade wheel 13 and the second blade wheel 15, which to a substantial degree is enclosed by the first blade wheel 13, and passes out through small gaps 32 between the blade wheels 13 and 15 and drain holes 32' in these wheels.
  • the blade wheels 13 and 15 thus have no contact with each other but instead, the force is transmitted from the first blade wheel 13 to the second blade wheel 15 with the help of the viscosity of the hydraulic fluid.
  • the coupling 5 has a housing 33 which collects the hydraulic fluid and leads it to a tank 33' at the bottom of the housing 33. The hydraulic fluid is then drained out from tank 33' of the coupling 5 through a drain line U.
  • the hydraulic fluid is then pumped by a pump 34 driven by the diesel engine 2 to a cooling circuit (not shown) to be subjected to a temperature-controlled cooling before it is returned to the inlet I in the coupling 5.
  • a valve (not shown) is moved to a closed position so that the pump 34 pumps the hydraulic fluid directly to the tank 33' without the hydraulic fluid passing between the blade wheels 13, 15.
  • Fig. 4 shows a part of the slipping coupling 5.
  • Four bolts 35 (of which only one is shown) are attached to the flange 31 and are distributed around the periphery of the flange at substantially equal intervals.
  • the inductive first sensor 12 is mounted on a flange 36 which projects from the housing 33.
  • a transmitted torque M of 1680 Nm can be established on the y-axis, as shown in Fig. 5.
  • the calibration curve K is converted in a manner well known to people skilled in this field into a mathematical relationship which provides very exact real-time values for the torque M. It is understood that a multitude of modifications to the described embodiment are possible within the scope of the invention.
  • the invention is suitable for several types of crusher.
  • the method and device can also be used with for example jaw crushers, impact breakers and roll crushers.
  • the control system 23 can be of several types which are well known to people skilled in this field.
  • An example of a suitable control system is ASR PlusTM, which is marketed by Svedala-Arbra, SE .
  • the hydraulic slipping coupling 5 can be either of the type which is continually fed with hydraulic fluid and thus completely ceases to transmit power when the supply of hydraulic oil is stopped, or of the type which always contains hydraulic oil and can therefore always transmit power.
  • the drive units 2 which above all are interesting are diesel engines, hydraulic motors and electric motors. However, petrol engines and various kinds of turbines can also be of interest in special cases.
  • the torque M can also be measured in other ways than by measuring rpms.
  • the output shaft 6 can be fitted with a strain gauge which is placed at a certain angle and which measures the torsion in the shaft 6.
  • this arrangement is relatively complicated.
  • the output shaft 6 can be very short and connect the second blade wheel 15 to a transmission 7, which in turn drives the crusher 9. Alternatively, the output shaft 6 can drive the crusher 9 direct.
  • the transmission 7 can also have a wheel which is mounted directly on the blade wheel 15 in such a way that the output shaft 6 is composed of the blade wheel and the wheel which is mounted on it.
  • the power display mentioned above often gives the information which the operator needs in order to make sure that the maximum possible amount of material is fed to the crusher. The operator is also given indications of faults. If for example a large object obstructs the crusher's feed opening, the power drops considerably.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Crushing And Grinding (AREA)
  • Disintegrating Or Milling (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Paper (AREA)
  • Micromachines (AREA)

Abstract

L'invention concerne une installation de concassage (1) équipée d'un concasseur (9) et d'une unité d'entraînement (2) servant à entraîner le concasseur (9). L'unité d'entraînement (2) est destinée à entraîner un couplage (5) transmettant de l'énergie au concasseur (9) par l'intermédiaire d'un arbre (6) de sortie du couplage (5). L'installation de concassage (1) est également équipée d'un dispositif (12, 14, 16) de mesure destiné à déterminer le couple transmis par l'arbre (6) de sortie au concasseur (9). L'exploitation de l'installation de concassage (1) est contrôlée en fonction de la détermination de ce couple, à l'aide du dispositif (12, 14, 16) de mesure.
PCT/SE2001/002398 2000-11-02 2001-11-01 Disposition et commande d'une installation de concassage WO2002036264A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP01979201A EP1341613B1 (fr) 2000-11-02 2001-11-01 Disposition et commande d'une installation de concassage
DE60137256T DE60137256D1 (de) 2000-11-02 2001-11-01 Anordnung und steuerung einer brechanlage
AU2002211186A AU2002211186A1 (en) 2000-11-02 2001-11-01 Arrangement and control of a crushing plant

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0003998A SE523037C2 (sv) 2000-11-02 2000-11-02 Sätt och anordning vid krossanläggning
SE0003998-2 2000-11-02

Publications (2)

Publication Number Publication Date
WO2002036264A1 WO2002036264A1 (fr) 2002-05-10
WO2002036264A9 true WO2002036264A9 (fr) 2003-02-20

Family

ID=20281666

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2001/002398 WO2002036264A1 (fr) 2000-11-02 2001-11-01 Disposition et commande d'une installation de concassage

Country Status (7)

Country Link
EP (1) EP1341613B1 (fr)
AT (1) ATE419067T1 (fr)
AU (1) AU2002211186A1 (fr)
DE (1) DE60137256D1 (fr)
ES (1) ES2317942T3 (fr)
SE (1) SE523037C2 (fr)
WO (1) WO2002036264A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103752398A (zh) * 2007-06-15 2014-04-30 山特维克知识产权股份有限公司 破碎装置及控制该破碎装置的方法
CA2689285C (fr) 2007-06-15 2014-10-14 Sandvik Intellectual Property Ab Installation de broyage et procede pour commander celle-ci
AT508989B1 (de) * 2009-10-29 2011-12-15 Stefan Hartl Antrieb für schwere geräte
EP2500100B1 (fr) * 2011-03-18 2014-03-12 Desch Antriebstechnik GmbH & Co. KG Dispositif d'entraînement et dispositif de machine de travail
FI123801B (fi) 2012-04-12 2013-10-31 Metso Minerals Inc Järjestelmä ja menetelmä murskaimen valvomiseksi ja ohjaamiseksi, murskain ja menetelmä murskaimen säätämiseksi
ES2724727B2 (es) * 2018-03-08 2023-02-14 Talleres Zb S A Metodo para optimizar la carga de un motor durante un proceso de fragmentado en una fragmentadora de materiales metalicos

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1113066A (fr) * 1977-05-05 1981-11-24 Marvin B. Shaver Systeme moteur pour broyeurs
US4609155A (en) * 1985-04-09 1986-09-02 Shredding Systems, Inc. Shredding apparatus including overload protection of drive line
DE3920273A1 (de) * 1989-06-21 1991-01-03 Hermann Getzmann Verfahren und vorrichtung zur regelung der drehzahl bei ruehrwerkskugelmuehlen
DE4422937A1 (de) * 1994-07-01 1996-01-04 Stamag Stahl Und Maschinenbau Verfahren zur Leistungsregelung einer Brecheranlage

Also Published As

Publication number Publication date
SE523037C2 (sv) 2004-03-23
SE0003998L (sv) 2002-05-03
EP1341613B1 (fr) 2008-12-31
EP1341613A1 (fr) 2003-09-10
DE60137256D1 (de) 2009-02-12
ATE419067T1 (de) 2009-01-15
ES2317942T3 (es) 2009-05-01
SE0003998D0 (sv) 2000-11-02
WO2002036264A1 (fr) 2002-05-10
AU2002211186A1 (en) 2002-05-15

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