EP2605866B1 - Dreiwelliges sieb - Google Patents

Dreiwelliges sieb Download PDF

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Publication number
EP2605866B1
EP2605866B1 EP11755371.9A EP11755371A EP2605866B1 EP 2605866 B1 EP2605866 B1 EP 2605866B1 EP 11755371 A EP11755371 A EP 11755371A EP 2605866 B1 EP2605866 B1 EP 2605866B1
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EP
European Patent Office
Prior art keywords
motor
angular position
variator
motors
comm
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Application number
EP11755371.9A
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English (en)
French (fr)
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EP2605866A1 (de
Inventor
Roland Lamarche
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Chauvin
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Chauvin
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Publication of EP2605866A1 publication Critical patent/EP2605866A1/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
    • B07B1/284—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens with unbalanced weights
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens

Definitions

  • the invention relates to sieves, and more particularly to a three-axis unbalance vibration generation system.
  • the figures 1 a and 1b represent two perspective views, the first showing the front and the second rear, of a conventional three-axis screen, such as the model proposed by Chauvin under the name TRIROL.
  • Three unbalance axes generally designated 10a, 10b, and 10c rotate in integral bearings of side walls of a carcass 12 resting on springs placed on a frame 14.
  • the three axes are parallel and arranged in a horizontal plane.
  • the unbalances are formed by a radial eccentricity (not visible) along the length of the axes, and by additional imbalances 16 fixed at the front and rear ends of the axes. As indicated by the positions shown additional unbalance, the two outer axes 10a and 10c have an unbalance of the same orientation, while the central axis 10b has an unbalance oriented differently, here orthogonal to that of the other two axes.
  • This configuration when the axes are rotated in synchronism, allows to impose an elliptical shaking trajectory to the carcass.
  • the long axis of the ellipse is tilting according to the unbalance orientation of the central axis.
  • this indexing is obtained using a toothed belt 18 connecting three toothed pulleys respectively fixed to the rear ends of the three axes.
  • This belt passes under the pulleys of the external axes 10a and 10c and on the pulley of the central axis 10b, so that the external axes are all driven in the same direction of rotation and the internal axis in the opposite direction.
  • a return loop of the toothed belt passes through a tensioning device fixed on the carcass above the central axis 10b.
  • two motors 20 are provided which are respectively connected to the external axes 10a and 10c by pulleys and V-belts (the belts are not shown). This configuration with two motors makes it possible to distribute the stresses in the toothed belt, so that it wears less quickly to fatigue.
  • the motors must follow the displacement of the carcass at startup. For this, they are mounted on pedestals 22 hinged relative to the frame 14. The motors are powered by a single drive (not shown) that regulates their rotation speed, and therefore the frequency of vibration.
  • Toothed belt systems tend to supplant gear systems today because they are much less expensive. On the other hand, the toothed belt wears out and must be changed according to the conditions of use.
  • a screen will produce noise because of the shocks of the granulate to be screened in the trunk, but the frequency of the shocks of the aggregate are less troublesome for the human being than the higher frequencies produced by the systems. indexing.
  • the indexing system be relatively silent.
  • a vibration generating system for a screen comprising two parallel unbalance axes rotating in synchronism; two motors arranged to respectively drive the two unbalance axes independently mechanically; a first drive arranged to control a first one of the motors, this drive being configured in a master mode where it communicates on an external link the angular position of the first motor; a second drive arranged to control the second motor, connected to said external link and configured in a slave mode where it slaves the angular position of the second motor according to the angular position conveyed on the external link; and DC power lines common to the drives.
  • each of the three unbalance axes 10a, 10b, and 10c is driven by a respective motor 20a, 20b and 20c.
  • the motors are controlled by three respective drives (not shown).
  • Each drive is of a type that allows the control of the angular position of the motor that it controls on an external setpoint.
  • One of the motor / drive groups is established as a "master” group and provides the angular position of its motor as a setpoint to the other two groups, which will be called “slave groups”.
  • slave groups the slave drives slave their motor position to the position of the master motor, so that the three motors are indexed in rotation.
  • cardan joints 24 are used. These cardan joints allow the motors to be mounted on the ground, or on a base that is fixed relative to the frame 14, so that these motors are not subjected to the vibrations of the carcass.
  • the figure 3 represents a connection diagram of the three drives to achieve the desired servocontrol of the three motors. To reduce the cost of design and facilitate maintenance, it is preferred to use commonly used commercially available dimmers. In this example, drives of the "CFW" series marketed by WEG are used. These drives have all the functions required to achieve the desired indexing system, namely the servo-control of the motor position on an external setpoint.
  • Each CFW drive has a power section on the left and a control section on the right.
  • the power unit comprises a rectifier and filter module 30 fed by the three-phase network.
  • the direct current produced by the module 30 is provided by two lines to a chopper module 32 which produces a three-phase amplitude and frequency modulated signal for supplying the motor 20.
  • the control part of the drive comprises a microcontroller CTRL which controls the various components of the power section according to various internal and external parameters.
  • the microcontroller comprises in particular a POS input for receiving the angular position of the motor, provided by a sensor mounted on the motor shaft, and a communication port COMM intended in particular to exchange operating parameters with the other drives. As shown, the COMM ports of the three drives are connected to a common bus.
  • a CFW drive has two modes of operation.
  • the "master" mode is the normal mode, intended for independent operation.
  • the drive uses the motor position information to control the rotational speed according to a user command.
  • it communicates the position of the motor on the communication port COMM.
  • a CFW servo drives the motor position to the position that a master drive on the COMM bus transmits.
  • the position may be changed by a user-adjustable offset on the drive. So, in the example of the figure 2 if the master drive controls the motor 20a, the slave drive that controls the motor 20b will be set to add 90 ° to the position it receives, while the inverter that controls the motor 20c adds 0 °.
  • the operator by adjusting the offset of the drive which controls the central motor 20b, will adjust the unbalance orientation of the central axis 10b, and thus the inclination of the axis of the elliptical trajectory of the vibrations. Such an adjustment could be made, on a conventional machine, only by a relatively heavy mechanical intervention, for example to reposition the toothed belt relative to the pulleys.
  • the lines carrying the DC current in each drive are connected to a DC bus common to all drives. This allows the energy produced by a motor behaving temporarily generator to be redistributed to other engines instead of being taken from the sector.
  • CFW drives have terminals B1 and B2 making the DC lines accessible from the outside, allowing this bus connection without modifying the drives.
  • each drive comprises a terminal B3 provided for connecting an external braking resistor between this terminal B3 and the terminal B1.
  • a transistor 34 connects the terminal B3 to the line connected to the terminal B2.
  • the braking resistor is thus connected between the two DC lines when the transistor 34 is conducting.
  • the transistor 34 is passed through the microcontroller CTRL when it is desired to stop the motor. The energy produced by the motor, then operating as a generator, is dissipated in the resistor.
  • a braking resistor should be connected to each drive.
  • a braking resistor which must be able to dissipate several kilowatts for a few seconds, is an expensive component that must be mounted on a heat sink.
  • the master drive is equipped with a braking resistor 36. Indeed, considering that the direct current lines are common to the three inverters, the transistor of the master drive ensures the management of the braking resistor. unique for all drives.
  • axis indexing system has been described in relation to three unbalance axes, which is its most useful application, but it is generally applicable to any vibration generating system having at least two unbalance axes .

Claims (5)

  1. Vorrichtung zur Erzeugung von Vibrationen für ein Sieb, die zwei parallele Unwuchtachsen (10a, 10b) umfasst, die sich synchron drehen, dadurch gekennzeichnet, dass sie umfasst:
    • zwei Motoren (20a, 20b), die so angeordnet sind, dass sie jeweils die beiden Unwuchtachsen mechanisch unabhängig voneinander antreiben;
    • ein erstes stufenloses Getriebe (CFW), das vorgesehen ist, einen ersten (20a) der Motoren zu steuern, welches Getriebe in einem Master-Modus konfiguriert ist, in dem es auf einer externen Verbindung (COMM) die Winkelstellung des ersten Moteurs übermittelt;
    • ein zweites stufenloses Getriebe (CFW), das zur Steuerung des zweiten Motors (20b) vorgesehen, mit der externen Verbindung (COMM) verbunden und in einem Slave-Modus konfiguriert ist, in dem es die Winkelstellung des zweiten Motors der Winkelstellung unterwirft, die über die externe Verbindung übermittelt wird; und
    • den stufenlosen Getrieben gemeine Gleichstromversorgungsleitungen (DC-Bus).
  2. Vorrichtung nach Anspruch 1, bei der die Motoren auf einem bezüglich dem Rahmen (14) des Siebs festen Sockel montiert und an ihren jeweiligen Unwuchtachsen durch Kardangelenke (24) verbunden sind.
  3. Vorrichtung nach Anspruch 1, bei der jedes stufenlose Getriebe eine Anschlussklemme (B3) für einen Bremswiderstand aufweist, wobei die Getriebe über das Master-Getriebe zusammen an einen gemeinsamen Bremswiderstand (36) gelegt sind.
  4. Vorrichtung nach Anspruch 1, die umfasst:
    • drei auf ein und derselben Ebene parallele Unwuchtachsen, wobei die Unwuchten der beiden äußeren Achsen (10a, 10c) die gleiche Radialausrichtung und die Unwucht der Mittelachse (10b) eine andere Radialausrichtung als die beiden äußeren Achsen haben;
    • einen dritten Motor (20c), der zum Antrieb der dritten Unwuchtachse (10c) vorgesehen ist; und
    • ein drittes stufenloses Getriebe im Slave-Modus, das so vorgesehen ist, dass es die Winkelstellung des dritten Motors der über die externe Verbindung (COMM) übermittelten Wickelstellung unterwirft.
  5. Vorrichtung nach Anspruch 4, bei der jedes Slave-Getriebe die Winkelstellung seines Motors der über die externe Verbindung (COMM) übermittelten Winkelstellung unterwirft, moduliert durch eine am Getriebe regelbare Versetzung.
EP11755371.9A 2010-08-18 2011-08-04 Dreiwelliges sieb Active EP2605866B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11755371T PL2605866T3 (pl) 2010-08-18 2011-08-04 Przesiewacz trójosiowy

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1003391A FR2963895B1 (fr) 2010-08-18 2010-08-18 Crible a trois axes
PCT/FR2011/000458 WO2012022859A1 (fr) 2010-08-18 2011-08-04 Crible a trois axes

Publications (2)

Publication Number Publication Date
EP2605866A1 EP2605866A1 (de) 2013-06-26
EP2605866B1 true EP2605866B1 (de) 2014-07-02

Family

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Family Applications (1)

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EP11755371.9A Active EP2605866B1 (de) 2010-08-18 2011-08-04 Dreiwelliges sieb

Country Status (4)

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EP (1) EP2605866B1 (de)
FR (1) FR2963895B1 (de)
PL (1) PL2605866T3 (de)
WO (1) WO2012022859A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014001515A1 (de) * 2014-02-07 2015-08-13 Schenck Process Gmbh Schwingmaschine
CN104759409B (zh) * 2015-05-07 2016-09-14 西南石油大学 基于弹性耦合的三激振电机椭圆振动筛
CN107442410A (zh) * 2017-10-12 2017-12-08 张宏强 一种振动筛内偏心式激振轴

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3308952A (en) * 1965-08-30 1967-03-14 Tyler Inc W S Vibrating screening apparatus with wedge ring support
FR2314776A1 (fr) * 1975-06-16 1977-01-14 Babbitless Sa Dispositif vibrant a action dirigee
FR2355576A2 (fr) * 1976-06-21 1978-01-20 Babbitless Sa Dispositif vibrant a action dirigee
PE20070556A1 (es) * 2005-08-04 2007-06-14 Metso Brasil Ind E Com Ltda Sistema de control de eficiencia de separacion en tamices vibratorios

Also Published As

Publication number Publication date
WO2012022859A1 (fr) 2012-02-23
FR2963895A1 (fr) 2012-02-24
FR2963895B1 (fr) 2012-09-07
EP2605866A1 (de) 2013-06-26
PL2605866T3 (pl) 2014-12-31

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