EP3902637B1 - Vorrichtung und verfahren zum einstellen und regeln wenigstens einer schwingungsmode mittels der vielzahl von unwuchterregereinheiten an einer siebvorrichtung - Google Patents

Vorrichtung und verfahren zum einstellen und regeln wenigstens einer schwingungsmode mittels der vielzahl von unwuchterregereinheiten an einer siebvorrichtung Download PDF

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Publication number
EP3902637B1
EP3902637B1 EP20715796.7A EP20715796A EP3902637B1 EP 3902637 B1 EP3902637 B1 EP 3902637B1 EP 20715796 A EP20715796 A EP 20715796A EP 3902637 B1 EP3902637 B1 EP 3902637B1
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EP
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Prior art keywords
cluster
oscillation
exciter units
screening device
unbalance exciter
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EP20715796.7A
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German (de)
English (en)
French (fr)
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EP3902637A1 (de
Inventor
Guido Leuschen
Florian Malcher
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FLSmidth AS
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FLSmidth AS
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Priority to RS20231003A priority Critical patent/RS64774B1/sr
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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
    • B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/10—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy
    • B06B1/16—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy operating with systems involving rotary unbalanced masses
    • B06B1/161—Adjustable systems, i.e. where amplitude or direction of frequency of vibration can be varied
    • B06B1/166—Where the phase-angle of masses mounted on counter-rotating shafts can be varied, e.g. variation of the vibration phase

Definitions

  • the invention relates to a device and a method for setting and controlling at least one vibration mode using the plurality of imbalance exciter units on a screening device.
  • the invention relates to a device and a method according to the preamble of the respective independent or subordinate claim.
  • Methods and devices for adjusting the oscillating behavior of an oscillating conveyor with counter-rotating imbalance drives driven by an electric motor are known. For example, it is known to adjust the position of the unbalanced masses relative to one another.
  • the desired oscillating angle can be changed during operation and/or a predefinable oscillating angle can be maintained independently of the material to be conveyed.
  • the object of the invention is to provide a method with the features described above, with which the range of functions of oscillating screens, in particular of oscillating conveyors, can be expanded in a simple manner, in particular with an advantageous structural design, in particular with the greatest possible variability.
  • a screening device set up for screening material to be screened, in particular for screening mineral rock, the screening device having a large number of imbalance exciter units that have a vibrational effect at a plurality of coupling points on the screening device, the screening device having a control and regulating device and being set up for adjustment and controlling at least one vibration mode by means of the plurality of unbalance exciter units; wherein the imbalance exciter units are grouped in a plurality of clusters of at least two imbalance exciter units each, each cluster being vibrationally coupled to the screening device at one of the coupling points, the screening device being set up by means of the control and regulating device to control and regulate the respective cluster for loading the screening device by a cluster vibration in the respective coupling point for each cluster, with at least two of the clusters being able to be controlled and regulated depending on one another with regard to the vibration generated, in particular at least four clusters (i.e. at least eight imbalance exciter units).
  • a scheme in subsets according to the number of clusters can on the one hand take place in a comparatively simple manner depending on the number of pathogens per cluster, on the other hand, the large number of clusters can provide a large degree of variability.
  • Each cluster can generate a cluster vibration through a plurality of excitation units, which can be coupled into the mechanical structure in particular in the area of a vibration node.
  • the excitation can take place at several coupling points in coordination with one another and can be optimized for a respective operating state. Last but not least, this enables an optimized, slim design. Safety factors can be reduced. For example, a change from linear to elliptical or circular vibration can be set in a simple manner.
  • the sieving can take place in a particularly selective manner, e.g. individualized with regard to a large amount of material and/or a large proportion of fines, or with regard to a small amount of material and/or a small proportion of fines.
  • a freely modulated deflection shape can be implemented in a flexible manner, in particular also in a scalable and individualized manner with the same control concept for different devices.
  • the deflection shape of the screen structure can be modulated almost freely in terms of amplitude and shape by superimposing individual pairs of imbalance exciter units.
  • a different vibration behavior can be generated when material is charged (impacted) and with regard to material discharge (individual controllability, in particular as a function of the operating situation/operating state).
  • a cluster vibration is to be understood as a vibration generated together by a plurality of imbalance exciter units (resulting vibration from superimposed individual vibrations of the cluster).
  • the cluster vibration can be introduced into the mechanical structure of the screening device at a (single) predefinable coupling point.
  • a vibration exposure point can be defined for each cluster.
  • An unbalance exciter unit is to be understood, for example, as a unit with a regulated, rotatable mass, in particular an asynchronous motor, which is set up to generate a predefinable vibration pattern.
  • the imbalance exciter units are vibrationally coupled to the screening device in at least two coupling points on opposite sides of a screen deck, in particular in an arrangement in a cluster of two, three or four imbalance exciter units per coupling point.
  • a coupling for optionally two, three or four or even more exciters per cluster or per coupling point can be arranged on side walls, in particular in the area of an oscillation node.
  • the imbalance exciter units are arranged in clusters in pairs in a twin arrangement and/or in a triplet arrangement (cluster with three imbalance exciter units each) and/or in a quadruplet arrangement (cluster with four imbalance exciter units each), in particular on a side wall of the screening device. This can also facilitate the initiation of the cluster oscillation in a predefined coupling point.
  • the unbalance exciter units may be arranged in clusters in pairs in a twin arrangement, with the paired unbalance exciter units being horizontal arranged side by side or vertically one above the other.
  • the imbalance exciter units can be arranged in clusters in a triplet arrangement, with the respective three imbalance exciter units being arranged in a triangular arrangement, in particular in accordance with an equilateral triangle, in particular with the apex of the triangle pointing downwards.
  • the imbalance exciter units can be arranged in clusters in a quadruplet arrangement, the four imbalance exciter units being arranged in a parallelogram arrangement, in particular with an offset in the horizontal direction.
  • the imbalance exciter units can be arranged in clusters of two or three imbalance exciter units or a multiple thereof.
  • the clusters can each be individually controllable, in particular depending on one another in terms of control technology.
  • the respective imbalance exciter unit is defined or regulated/can be controlled by at least one of the following parameters: imbalance mass, exciter speed, exciter direction (in particular direction of rotation), phase offset to at least one of the other imbalance exciter units. Last but not least, the combinability of these parameters provides high variability and targeted influencing of control effects.
  • the imbalance exciter units are each designed as asynchronous motors or have at least one asynchronous motor.
  • the screening device has at least four clusters, each with at least two imbalance exciter units.
  • the screening device is set up for powerless passage through a resonance range, in particular when starting up or switching off.
  • the aforementioned object is achieved according to the invention by a method for setting and controlling at least one vibration mode of a screening device, in particular when screening material to be screened, in particular when screening mineral rock, the respective vibration mode being controlled by means of a large number of imbalance exciter units; wherein each of the imbalance exciter units is controlled and regulated individually with regard to a plurality of parameters, in particular at least with regard to the parameters of excitation force and excitation direction, wherein the imbalance exciter units are arranged in a plurality of clusters of at least two imbalance exciter units for impinging on the screening device by a cluster vibration in a respective Coupling point per cluster can be controlled and regulated, with at least two of the clusters being controlled and regulated depending on one another with respect to the vibration generated, in particular at least four clusters (ie at least eight imbalance exciter units).
  • control can also be simplified in that a respective cluster is given one of a number of optional vibration-related specifications, as a result of which a desired absolute vibration effect is set in combination with the other clusters. For example, with four clusters and three to five predefined excitation states, a large number of different operating states can be imposed in a simple manner.
  • the screening device for each cluster is optionally set/adjusted to a linear vibration or an elliptical vibration or a circular vibration.
  • the free variability with regard to the type of vibration can be considered a great advantage with regard to a multifunctional use of the device.
  • the screening device can be adjusted to a linear vibration for each cluster by at least controlling or varying the excitation direction.
  • the screening device can be adjusted to an elliptical oscillation for each cluster, in that at least two directions of excitation are controlled as a function of one another.
  • the screening device can be adjusted to a circular vibration per cluster by operating the imbalance excitation units with the same excitation direction, especially at 180° phase shift.
  • the screening device can be controlled from a linear vibration to a circular vibration or elliptical vibration, or vice versa, by changing at least one of several directions of excitation and keeping at least one direction of excitation constant.
  • the oscillating body oscillates in a preferred direction, similar to a linear oscillator, but this oscillation is superimposed by an oscillation perpendicular to the main oscillation direction with an amplitude between 0 (linear oscillation) and the amplitude of the main oscillation direction (circular oscillation).
  • linear oscillation linear oscillation
  • amplitude of the main oscillation direction circular oscillation.
  • At least one of the following parameters is controlled per cluster, in particular individually for each imbalance exciter unit: exciter force, exciter speed, exciter direction (in particular direction of rotation), phase offset to at least one of the imbalance exciter units, in particular with combined control of at least the parameters exciter speed, exciter direction and phase offset.
  • the phase shift can be controlled in particular by varying the speed as a function of time.
  • the at least one vibration mode of the screening device is set by the vibration shape of all clusters being controlled in a coordinated manner at least by combined control of at least the parameters excitation speed, excitation direction and phase offset per cluster, in particular with reference to at least one master curve per cluster.
  • individual master curves with virtual axes can be specified for each excitation unit, in particular in each case coupled to form an overall master curve. Deviations between the real (instantaneous) axis and the virtual axis can be defined as a control deviation for specifying control-related countermeasures.
  • the speed that can be specified can be changed as a function of time, e.g. according to a ramp function.
  • At least one master curve generated/specifiable purely mathematically without measured values defines a virtual measured curve, with respect to which the regulation is carried out at least for each cluster or also within the respective cluster individually for each imbalance exciter unit. This can also result in a decoupling of any disturbing influences, and the regulation can take place in a particularly robust manner, even when a large degree of variability is desired.
  • a master curve can provide a comparatively exact reference value for the respective control parameter.
  • a movement curve based purely on mathematical aspects is generated, with respect to which the regulation can take place in a comparatively exact manner. For example, an angular range from 0 to 360° or 0 to 2xPi (number of circles) is plotted against time, with this being repeated continuously. The time of a revolution is determined by the speed; for example, at 750 revolutions per minute, the rotation time is 80ms.
  • this master curve has the shape of a sawtooth.
  • the master curve can be predefined without artefacts or measurement tolerances.
  • known master / slave systems in which the Position of a master motor is measured and the slaves are adapted to it, disturbance caused by measurement errors and influences of gravity are tolerated.
  • multiple master curves can be defined for a variety of parameters.
  • the target curves (set values for the control parameters) for the respective clusters or imbalance exciter units can be correlated to the master curves.
  • Individual phase offsets, directions of rotation and/or individual speeds compared to the master curve can represent the virtual axes of the imbalance exciter units.
  • the imbalance exciter units are controlled in particular in relation to these virtual axes. It can also be predefined in which way the respective desired curve/target curve is to be correlated with the main master curve, in particular with regard to speed, phase offset and/or direction of rotation.
  • the respective parameter can remain constant or be set to vary over one revolution, for example to compensate for the effects of gravity.
  • phase offset For example, a phase offset, a direction of rotation and/or a speed is/are each measured and controlled relative to the master curve. In this way, any disturbance variables can advantageously be minimized.
  • the imbalance exciter units are controlled and regulated in clusters of two or three or four imbalance exciter units.
  • the imbalance exciter units can be controlled and regulated in clusters of at least three imbalance exciter units, with at least one of the imbalance exciter units of the cluster being time-controlled in different or shorter time windows than the other imbalance exciter units of the cluster.
  • the unbalanced exciter units are regulated in such a way that the end position (rest position) is correlated with the zero position of the respective unbalanced exciter unit assumed due to gravitational forces, in particular with the lowest center of mass of the respective unbalanced exciter unit.
  • the imbalance exciter units are controlled in such a way that the phases of the imbalance exciter units are coordinated with one another to set an imbalance in the distribution of the excitation force over the extent of a screen deck of the screening device, in particular by means of a respective cluster comprising at least three imbalance exciter units.
  • the side walls 31, 32 are, in particular, mirror-symmetrical.
  • the two side walls 31, 32 are arranged mirror-symmetrically to one another with respect to a vertical mirror plane that extends along a conveying direction x.
  • the side walls 31, 32 are arranged parallel to one another.
  • the side walls 31, 32 include or support traverses 5, which connect the two side walls 31, 32 to one another and support one another.
  • a screen deck 6 is supported on some of the traverses 5 .
  • all traverses 5 are designed identically, namely as tubes with a hollow profile.
  • Screened mineral rock falls vertically downwards through recesses in the screen deck 6 .
  • Mineral rock which is larger than the openings in the screen deck 6, can be moved along a conveying direction x via the screen deck 6, depending on the desired operating state, by the excitation of the vibration systems 4.
  • the screen deck 6 is excited by cluster vibrations, which are each coupled into the side walls from one of a plurality of clusters.
  • Each vibration system 4 here includes, for example, two imbalance exciter units 41, which are arranged in a cluster 40 in the area of a vibration node.
  • the cluster can also include more than two imbalance exciter units, for example three or four imbalance exciter units, in particular in a triangular arrangement, in particular in accordance with an equilateral triangle, or in a quadruplet arrangement, in particular in a parallelogram arrangement with an offset in the horizontal direction (FIG. 2ff.).
  • the vibration systems 4 can each be arranged on the respective side wall 31, 32 in such a way that each vibration system 4 or each cluster 40 overlaps a vibration node of the respective side wall 31, 32 or is arranged in the region of the respective vibration node of a bending mode of the respective side wall 31, 32 is.
  • each vibration system 4 are arranged in such a way that each vibration node is positioned between the imbalance exciter units, in particular in the middle.
  • Each imbalance exciter unit can in particular have at least one imbalance mass.
  • the screening device 1 has a control and regulation device 7 which is connected to the imbalance exciter units in order to set at least one vibration parameter for a respective cluster.
  • the screening device has four clusters 40 which can each be coupled at a coupling point P to the corresponding side wall.
  • the screening device comprises more than four clusters, for example six or eight clusters.
  • Figure 2A shows a cluster 40 with a twin arrangement of two imbalance exciter units 41 at least approximately horizontally next to one another.
  • Figure 2B shows a cluster 40 with a twin arrangement of two imbalance exciter units 41 at least approximately vertically one above the other.
  • Figure 2C shows a cluster 40 with a triplet arrangement of three imbalance exciter units 41 according to a triangular geometry, in particular according to an equilateral triangle, with the apex of the triangle pointing downwards.
  • the use of at least three imbalance exciter units enables, for example, a temporary force variation, in particular by means of phase matching.
  • An application arises, for example, when the mass of the input material is unevenly distributed (inhomogeneous sieve loading). Then, in particular, the overloaded section of the Sieve are applied with the greater force, with the effect that the feedstock can be distributed more homogeneously on the screen.
  • 2D shows a cluster 40 with a quadruple arrangement of four unbalanced exciter units 41 according to a parallelogram geometry with an offset in the horizontal direction, in particular with the lower unbalanced exciter units offset to the right.
  • imbalance exciter units shown can each be defined at least by the following parameters or parameters: imbalance, (rotational) speed, direction of rotation, phase offset (in particular phase offset to a predefinable master curve).
  • the coupling point P can be a coupling point of the respective cluster 40 to the corresponding side wall 31, 32 that is defined at least geometrically and optionally also mechanically (in terms of device technology, structurally).
  • the 3 shows the principle of a control state for dissipating forces, with instantaneous force vectors that are precisely aligned with one another, using the example of a cluster with two unbalance exciter units.
  • a powerless, structure-preserving start-up of a system can take place, in particular for the purpose of avoiding resonance vibrations.
  • a (current) force vector F of the first unbalance exciter unit points (especially in this illustrated excitation time) in the opposite direction to the force vector F of the second unbalance exciter unit; the two force vectors F point to each other.
  • the direction of rotation of the respective unbalance exciter unit is indicated by a semicircular arrow above the respective unbalance exciter unit.
  • the imbalance exciter units rotate in opposite directions to each other.
  • Figure 4A shows a cluster in which a (current) force vector F of the first unbalance exciter unit (especially in this illustrated excitation time) points in the opposite direction to the force vector F of the second unbalance exciter unit; the two force vectors F point towards one another; the unbalance exciter units rotate in the same direction.
  • the phase shift is 180°; a resulting excitation force Fr (resulting cluster vector) is zero (powerless).
  • Figure 4A describes an operating state which can be set/controlled, for example, for powerless driving up or down through the resonance range of the device.
  • Figure 4B shows a cluster where the force vectors F point in the same direction; the unbalance exciter units rotate in the same direction.
  • a resulting cluster force vector Fr also points in the same direction as the force vectors F, specifically horizontally to the right.
  • the phase offset is 0° or is non-existent; a resulting excitation force Fr (resulting cluster vector) is maximal.
  • Figure 4C shows a cluster in which the force vectors F are aligned orthogonally to one another, in particular horizontally to the right and vertically upwards; the unbalance exciter units rotate in the same direction (here: clockwise).
  • a momentary cluster force Fr resulting from the cluster oscillation points diagonally upwards, in particular upwards to the right at an angle of approx. 35°.
  • the phase shift is between 0° and 180°; the resulting excitation force Fr for the respective cluster results from vector addition and is smaller than in Figure 4B acting absolute excitation force.
  • Figure 4D shows a cluster in which the force vectors F are aligned orthogonally to one another, in particular horizontally to the right and vertically upwards; the second (right) force vector is longer/larger than the first (left) force vector; the unbalance exciter units rotate in the same direction.
  • a first resultant excitation force Fr points horizontally to the right in the same direction as the first (left) force vector F.
  • a second resultant excitation force Fr points diagonally upwards, in particular upwards to the right at an angle of approximately 45°.
  • the phase offset is between 0° and 180° and can also be 0° or 180°; an excitation force Fr resulting for the respective cluster results from vector addition.
  • Figure 4D describes a regulation in which the individual vector amounts are adjusted by varying the speed of the respective imbalance exciter unit; The square of the speed can define the centrifugal force acting in each case.
  • both force vectors F point upwards, in particular vertically upwards; the imbalance exciter units rotate in opposite directions to each other. A phase shift is not realized (0°); cluster excitation occurs in the vertical direction.
  • Figure 5A describes an operating state, which, for example, for a cleaning function is adjustable / controllable, in particular in connection with a variation of the speed of the respective imbalance exciter unit.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
EP20715796.7A 2019-04-04 2020-03-25 Vorrichtung und verfahren zum einstellen und regeln wenigstens einer schwingungsmode mittels der vielzahl von unwuchterregereinheiten an einer siebvorrichtung Active EP3902637B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RS20231003A RS64774B1 (sr) 2019-04-04 2020-03-25 Uređaj i postupak za podešavanje i kontrolu najmanje jednog režima oscilacija pomoću većeg broja inercijalnih vibracionih jedinica na uređaju za prosejavanje

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019204845.5A DE102019204845B3 (de) 2019-04-04 2019-04-04 Vorrichtung und Verfahren zum Einstellen und Regeln wenigstens einer Schwingungsmode mittels der Vielzahl von Unwuchterregereinheiten an einer Siebvorrichtung
PCT/EP2020/058268 WO2020200943A1 (de) 2019-04-04 2020-03-25 Vorrichtung und verfahren zum einstellen und regeln wenigstens einer schwingungsmode mittels der vielzahl von unwuchterregereinheiten an einer siebvorrichtung

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EP3902637A1 EP3902637A1 (de) 2021-11-03
EP3902637B1 true EP3902637B1 (de) 2023-09-06

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EP (1) EP3902637B1 (sr)
DE (1) DE102019204845B3 (sr)
DK (1) DK3902637T3 (sr)
FI (1) FI3902637T3 (sr)
RS (1) RS64774B1 (sr)
WO (1) WO2020200943A1 (sr)

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DE102021204392B3 (de) 2021-04-30 2021-12-30 Thyssenkrupp Ag Verfahren zum Betreiben einer Siebvorrichtung als Kreisschwinger, Ellipsenschwinger oder Linearschwinger in Abhängigkeit von der Feuchte des zu siebenden Materials
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WO2022229093A1 (de) 2021-04-30 2022-11-03 Thyssenkrupp Industrial Solutions Ag Verfahren zum betreiben einer siebvorrichtung zur konstanthaltung der produktqualität bei schwankendem massestrom
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BE1029524B1 (de) 2021-06-24 2023-01-30 Thyssenkrupp Ind Solutions Ag Verfahren zum Ansteuern einer Siebvorrichtung und Siebvorrichtung
DE102021206530A1 (de) 2021-06-24 2022-12-29 Thyssenkrupp Ag Verfahren zum Ansteuern einer Siebvorrichtung und Siebvorrichtung
WO2023111805A1 (en) 2021-12-13 2023-06-22 Flsmidth A/S Vibrating conveyor with imbalance exciter units arranged in clusters
DE102021214176A1 (de) 2021-12-13 2023-06-15 Thyssenkrupp Industrial Solutions Ag Schwingrinne mit in Clustern angeordneten Unwuchterregereinheiten
BE1030008B1 (de) 2021-12-13 2023-07-10 Smidth As F L Schwingrinne mit in Clustern angeordneten Unwuchterregereinheiten
AT525173B1 (de) 2022-04-12 2023-01-15 Sbm Mineral Proc Gmbh Siebvorrichtung

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DE202015001305U1 (de) * 2014-02-24 2015-07-07 Jöst GmbH + Co. KG Schwinganordnung für einen Rütteltisch oder eine Siebvorrichtung
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WO2020200943A1 (de) 2020-10-08
RS64774B1 (sr) 2023-11-30
DK3902637T3 (da) 2023-11-06
DE102019204845B3 (de) 2020-07-09
FI3902637T3 (fi) 2023-11-03

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