EP2605866B1 - Three-shaft sieve - Google Patents
Three-shaft sieve Download PDFInfo
- 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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- European Patent Office
- Prior art keywords
- motor
- angular position
- variator
- motors
- comm
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- 239000000843 powder Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009365 direct transmission Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
Images
Classifications
-
- 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 .
Landscapes
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Control Of Multiple Motors (AREA)
Description
L'invention est relative aux cribles, et plus particulièrement à un système de génération de vibrations à trois axes à balourd.The invention relates to sieves, and more particularly to a three-axis unbalance vibration generation system.
De tels systèmes sont décrits dans les documents
Les
Trois axes à balourd, désignés de façon générale par 10a, 10b, et 10c tournent dans des paliers solidaires de parois latérales d'une carcasse 12 s'appuyant sur des ressorts posés sur un bâti 14. Les trois axes sont parallèles et disposés dans un plan horizontal.Three unbalance axes, generally designated 10a, 10b, and 10c rotate in integral bearings of side walls of a
Les balourds sont formés par une excentration radiale (non visible) sur la longueur des axes, et par des balourds additionnels 16 fixés aux extrémités avant et arrière des axes. Comme cela est indiqué par les positions représentées des balourds additionnels, les deux axes externes 10a et 10c présentent un balourd de même orientation, tandis que l'axe central 10b présente un balourd orienté différemment, ici orthogonalement à celui des deux autres axes.The unbalances are formed by a radial eccentricity (not visible) along the length of the axes, and by
Cette configuration, lorsque les axes sont entraînés en rotation en synchronisme, permet d'imposer une trajectoire de secousse elliptique a la carcasse. Le grand axe de l'ellipse est inclinable en fonction de l'orientation du balourd de l'axe central.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.
Ainsi, il est important d'indexer les axes en rotation les uns par rapport aux autres. Comme on le voit à la
Pour entraîner en rotation les trois axes, il suffit d'accoupler l'un des axes à un moteur. Comme cela est visible à la
Les moteurs doivent suivre le déplacement de la carcasse au démarrage. Pour cela, ils sont montés sur des socles 22 articulés par rapport au bâti 14. Les moteurs sont alimentés par un même variateur (non représenté) qui permet de réguler leur vitesse de rotation, et donc la fréquence des vibrations.The motors must follow the displacement of the carcass at startup. For this, they are mounted on
Il existe des cribles où l'indexation des axes est faite à l'aide d'engrenages. Les systèmes à courroie crantée ont tendance aujourd'hui à supplanter les systèmes à engrenages, car ils sont nettement moins coûteux. Par contre, la courroie crantée s'use et doit être changée en fonction des conditions d'utilisation.There are screens where indexing of the axes is done using gears. 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.
Par ailleurs, les systèmes d'indexation connus pour les cribles se révèlent bruyants du fait des chocs entre les dents ou crans venant en prise et du rattrapage des jeux dans les éléments de transmission. On tente aujourd'hui d'améliorer les conditions de travail des opérateurs, et notamment de réduire les nuisances sonores produites par les machines.Furthermore, the known indexing systems for the screens are noisy due to shocks between the teeth or notches engaging and catching games in the transmission elements. Today attempts are being made to improve the working conditions of operators, and in particular to reduce the noise pollution produced by the machines.
Quoiqu'on fasse, un crible produira du bruit du fait des chocs du granulat à cribler dans le coffre, mais les fréquence des chocs du granulat sont moins gênantes pour l'être humain que les fréquences, plus élevées, produites par les systèmes d'indexation.Whatever the case may be, 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.
On constate qu'on a besoin d'un système d'indexation réglable en rotation de plusieurs axes nécessitant peu d'opérations de maintenance.It is noted that one needs an indexing system adjustable in rotation of several axes requiring little maintenance.
On souhaite en outre que le système d'indexation soit relativement silencieux.It is further desired that the indexing system be relatively silent.
On tend à satisfaire ces besoins en prévoyant un système de génération de vibrations pour un crible comprenant deux axes à balourd parallèles tournant en synchronisme ; deux moteurs agencés pour entraîner respectivement les deux axes à balourd de manière indépendante mécaniquement ; un premier variateur agencé pour commander un premier des moteurs, ce variateur étant configuré dans un mode maître où il communique sur une liaison externe la position angulaire du premier moteur ; un deuxième variateur agencé pour commander le deuxième moteur, connecté à ladite liaison externe et configuré dans un mode esclave où il asservit la position angulaire du deuxième moteur en fonction de la position angulaire véhiculée sur la liaison externe ; et des lignes d'alimentation en courant continu communes aux variateurs.These needs are tending to be satisfied by providing 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.
D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre de modes particuliers de réalisation donnés à titre d'exemples non limitatifs et illustrés à l'aide des dessins annexés, dans lesquels :
- les
figures 1 a et 1 b, précédemment décrites, représentent deux vues en perspective d'un crible classique ; - la
figure 2 représente une vue en perspective partielle d'un crible, révélant un mode de réalisation de système d'indexation amélioré ; et - la
figure 3 représente un schéma simplifié de connexion de plusieurs variateurs alimentant respectivement les moteurs du système d'indexation de lafigure 2 .
- the
figures 1 a and 1b, previously described, represent two perspective views of a conventional screen; - the
figure 2 represents a partial perspective view of a screen, revealing an improved indexing system embodiment; and - the
figure 3 represents a simplified connection diagram of several variators supplying respectively the motors of the indexing system of thefigure 2 .
Afin de réduire les nuisances sonores, on prévoit de supprimer l'indexation mécanique des axes, et de la remplacer par une indexation électronique. Cela permet par ailleurs l'élimination de pièces de transmission susceptibles d'usure, notamment les courroies crantées.To reduce noise, it is planned to remove the mechanical indexing of the axes, and replace it with an electronic indexing. This also allows the elimination of transmission parts likely to wear, including timing belts.
A la
L'un des groupes moteur/variateur est établi en tant que groupe « maître » et fournit la position angulaire de son moteur comme consigne aux deux autres groupes, que l'on désignera « groupes esclaves ». Il en résulte que les variateurs esclaves asservissent la position de leurs moteurs sur la position du moteur maître, de sorte que les trois moteurs se trouvent indexés en rotation.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". As a result, the slave drives slave their motor position to the position of the master motor, so that the three motors are indexed in rotation.
Comme c'est l'indexation en rotation des axes à balourd que l'on recherche, on préfèrera relier les moteurs aux axes par une transmission directe, empêchant toute rotation relative de l'axe à balourd par rapport au rotor du moteur. On utilise pour cela, par exemple, des joints de Cardan 24. Ces joints de Cardan permettent le montage des moteurs sur le sol, ou sur un socle fixe par rapport au bâti 14, de manière que ces moteurs ne soient pas soumis aux vibrations de la carcasse.As it is the indexing in rotation of the unbalanced axes that one seeks, one will prefer to connect the motors to the axes by a direct transmission, preventing any relative rotation of the unbalanced axis compared to the rotor of the engine. For this purpose, for example,
La
Chaque variateur CFW comprend une partie puissance, à gauche, et une partie commande, à droite. La partie puissance comprend un module redresseur et de filtrage 30 alimenté par le réseau triphasé. Le courant continu produit par le module 30 est fourni par deux lignes à un module hacheur 32 qui produit un signal triphasé module en amplitude et en fréquence pour alimenter le moteur 20.Each CFW drive has a power section on the left and a control section on the right. The power unit comprises a rectifier and
La partie commande du variateur comprend un microcontrôleur CTRL qui commande les différents composants de la partie puissance en fonction de divers paramètres internes et externes. Le microcontrôleur comprend notamment une entrée POS pour recevoir la position angulaire du moteur, fournie par un capteur monté sur l'arbre du moteur, et un port de communication COMM destiné notamment à échanger des paramètres de fonctionnement avec les autres variateurs. Comme cela est représenté, les ports COMM des trois variateurs sont connectés à un bus commun.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.
Un variateur CFW a deux modes de fonctionnement. Le mode « maître» est le mode normal, destiné à un fonctionnement de manière indépendante. Dans ce mode, le variateur utilise l'information de position du moteur pour asservir la vitesse de rotation en fonction d'une consigne utilisateur. Par ailleurs, il communique la position du moteur sur le port de communication COMM.A CFW drive has two modes of operation. The "master" mode is the normal mode, intended for independent operation. In this mode, the drive uses the motor position information to control the rotational speed according to a user command. In addition, it communicates the position of the motor on the communication port COMM.
Dans le mode « esclave », un variateur CFW asservit la position du moteur sur la position que transmet un variateur maître sur le bus COMM. La position est éventuellement modifiée d'un décalage réglable par l'utilisateur sur le variateur. Ainsi, dans l'exemple de la
En procédant simplement comme décrit jusqu'à maintenant, c'est-à-dire en utilisant trois variateurs, l'un maître, et les deux autres esclaves, interconnectés seulement par le bus COMM, il s'avère que chaque variateur se trouve régulièrement dans des mauvaises conditions de fonctionnement et se met en mode sécurité. En fait, cela arrive lorsque le balourd entraîne le moteur par gravité et que le moteur se comporte en générateur.By proceeding simply as described so far, that is to say using three drives, one master, and the other two slaves, interconnected only by the COMM bus, it turns out that each drive is regularly in poor operating conditions and goes into safety mode. In fact, this happens when the unbalance drives the engine by gravity and the engine behaves like a generator.
Pour éviter ce problème, comme cela est représenté, les lignes véhiculant le courant continu dans chaque variateur sont reliées à un bus DC-Bus commun à tous les variateurs. Cela permet à l'énergie produite par un moteur se comportant transitoirement en générateur d'être redistribuée sur les autres moteurs au lieu d'être prélevée sur le secteur.To avoid this problem, as shown, 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.
Il s'avère que les variateurs CFW ont des bornes B1 et B2 rendant les lignes de courant continu accessibles de l'extérieur, permettant cette connexion en bus sans modifier les variateurs.It turns out that the CFW drives have terminals B1 and B2 making the DC lines accessible from the outside, allowing this bus connection without modifying the drives.
Par ailleurs, chaque variateur comprend une borne B3 prévue pour connecter une résistance de freinage externe entre cette borne B3 et la borne B1. Un transistor 34 relie la borne B3 à la ligne connectée à la borne B2. La résistance de freinage est ainsi connectée entre les deux lignes de courant continu lorsque le transistor 34 est passant. Le transistor 34 est rendu passant par le microcontrôleur CTRL lorsque l'on souhaite arrêter le moteur. L'énergie produite par le moteur, fonctionnant alors en générateur, est dissipée dans la résistance.Furthermore, each drive comprises a terminal B3 provided for connecting an external braking resistor between this terminal B3 and the terminal B1. A
Dans le schéma de la
Pour éviter cela, on n'équipe que le variateur maître d'une résistance de freinage 36. En effet, compte tenu que les lignes de courant continu sont communes aux trois variateurs, le transistor du variateur maître assure la gestion de la résistance de freinage unique pour tous les variateurs.To avoid this, only the master drive is equipped with a
De nombreuses variantes et modifications des modes de réalisation décrits ici apparaîtront à l'homme du métier. Le système d'indexation des axes a été décrit en relation avec trois axes à balourd, qui en est l'application la plus utile, mais il s'applique de façon générale à tout système de génération de vibrations comportant au moins deux axes à balourd.Many variations and modifications of the embodiments described herein will be apparent to those skilled in the art. The 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)
- System for generating vibrations for a sieve, comprising two synchronously rotating and parallel eccentric shafts (10a, 10b), characterized in that it comprises:• two motors (20a, 20b) arranged to separately and mechanically drive the two eccentric shafts, respectively;• a first variator (CFW) arranged to control a first one (20a) of the motors, said variator being configured in a master mode in which the same communicates the angular position of the first motor over an external link (COMM);• a second variator (CFW) arranged to control the second motor (20b), connected to said external link (COMM) and configured in a slave mode in which the same controls the angular position of the second motor according to the angular position conveyed over the external link; and• direct-current powder supply lines (DC-Bus) that are common to the variators.
- System according to claim 1, wherein the motors are mounted on a base which is fixed with respect to the sieve frame (14) and are connected to their respective eccentric shafts by Cardan joints (24).
- System according to claim 1, wherein each variator comprises a terminal (B3) for connecting a braking resistor, the variators being connected together to a common braking resistor (36) via the master variator.
- System according to claim 1, comprising:• three parallel eccentric shafts in a same plane, the eccentric parts of the two external shafts (10a, 10c) having the same radial direction, and the eccentric part of shaft (10b) having radial direction different from that of the external shafts;• a third motor (20c) arranged to drive the third eccentric shaft (10c); and• a third variator, in slave mode, arranged to control the angular position of the third motor according to the angular position conveyed over the external link (COMM).
- System according to claim 4, wherein each slave variators controls the angular position of its motor with the angular position conveyed over the external link (COMM), modified by an offset settable on the variator.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL11755371T PL2605866T3 (en) | 2010-08-18 | 2011-08-04 | Three-shaft sieve |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1003391A FR2963895B1 (en) | 2010-08-18 | 2010-08-18 | THREE AXIS SCREEN |
PCT/FR2011/000458 WO2012022859A1 (en) | 2010-08-18 | 2011-08-04 | Three-shaft sieve |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2605866A1 EP2605866A1 (en) | 2013-06-26 |
EP2605866B1 true EP2605866B1 (en) | 2014-07-02 |
Family
ID=43707810
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP11755371.9A Active EP2605866B1 (en) | 2010-08-18 | 2011-08-04 | Three-shaft sieve |
Country Status (4)
Country | Link |
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EP (1) | EP2605866B1 (en) |
FR (1) | FR2963895B1 (en) |
PL (1) | PL2605866T3 (en) |
WO (1) | WO2012022859A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014001515A1 (en) * | 2014-02-07 | 2015-08-13 | Schenck Process Gmbh | vibrating machine |
CN104759409B (en) * | 2015-05-07 | 2016-09-14 | 西南石油大学 | Three shock electric machine elliptically vibrating screens based on Elastic Coupling |
CN107442410A (en) * | 2017-10-12 | 2017-12-08 | 张宏强 | Centering type vibrating shaft in a kind of vibratory sieve |
Family Cites Families (4)
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 (en) * | 1975-06-16 | 1977-01-14 | Babbitless Sa | DIRECTED ACTION VIBRATING DEVICE |
FR2355576A2 (en) * | 1976-06-21 | 1978-01-20 | Babbitless Sa | Vibratory screen with lever operated adjuster - has twin racks operating chain-wheels permitting plane adjustment without altering amplitude |
PE20070556A1 (en) * | 2005-08-04 | 2007-06-14 | Metso Brasil Ind E Com Ltda | SEPARATION EFFICIENCY CONTROL SYSTEM IN VIBRATORY SCREENS |
-
2010
- 2010-08-18 FR FR1003391A patent/FR2963895B1/en not_active Expired - Fee Related
-
2011
- 2011-08-04 EP EP11755371.9A patent/EP2605866B1/en active Active
- 2011-08-04 WO PCT/FR2011/000458 patent/WO2012022859A1/en active Application Filing
- 2011-08-04 PL PL11755371T patent/PL2605866T3/en unknown
Also Published As
Publication number | Publication date |
---|---|
PL2605866T3 (en) | 2014-12-31 |
FR2963895A1 (en) | 2012-02-24 |
FR2963895B1 (en) | 2012-09-07 |
WO2012022859A1 (en) | 2012-02-23 |
EP2605866A1 (en) | 2013-06-26 |
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