EP3693090A1 - Tamiseur réglable et procede d'utilisation d'un tamiseur réglable - Google Patents

Tamiseur réglable et procede d'utilisation d'un tamiseur réglable Download PDF

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Publication number
EP3693090A1
EP3693090A1 EP19000069.5A EP19000069A EP3693090A1 EP 3693090 A1 EP3693090 A1 EP 3693090A1 EP 19000069 A EP19000069 A EP 19000069A EP 3693090 A1 EP3693090 A1 EP 3693090A1
Authority
EP
European Patent Office
Prior art keywords
shaft
gear
drive
speed
main shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP19000069.5A
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German (de)
English (en)
Inventor
Jochen Weiers
Jürg Pollmanns
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siteg Siebtechnik GmbH
Siebtechnik GmbH
Original Assignee
Siteg Siebtechnik GmbH
Siebtechnik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siteg Siebtechnik GmbH, Siebtechnik GmbH filed Critical Siteg Siebtechnik GmbH
Priority to EP19000069.5A priority Critical patent/EP3693090A1/fr
Publication of EP3693090A1 publication Critical patent/EP3693090A1/fr
Pending legal-status Critical Current

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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
    • B07B1/42—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
    • 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
    • B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
    • B07B13/14—Details or accessories
    • B07B13/18—Control

Definitions

  • the invention relates to a controllable screening machine comprising at least one screen box and a drive unit, by means of which the screen box can be made to vibrate, the drive unit having a drive motor which drives two drive shafts rotating in opposite directions, each with at least one unbalanced mass, with the drive motor having the first drive shaft as the main shaft drives and the second drive shaft is coupled as a secondary shaft via a kinematic chain with the main shaft.
  • the invention also relates to a method for operating such a controllable screening machine.
  • a vibration-generating drive for screening machines with elliptical vibrations is known.
  • a sieve box with a sieve bottom is connected to a foundation via springs.
  • the screening machine has three circular vibration generators, also called balancing drives, in each of which an imbalance is connected to a rotating drive, so that centrifugal forces act as resultant during operation.
  • Two identical circular oscillation generators are mounted in opposite directions so that the unbalance is always parallel in one direction and in opposite directions in a direction perpendicular to this. As a result, the resulting forces are eliminated in one direction and the forces are increased in that direction perpendicular direction. This results in a linear oscillation.
  • a third circular vibration generator generates a circular vibration with its unbalance.
  • DE 7811967 U1 shows a drive for an oscillating machine in which two circular oscillation exciters run synchronously at the same speed and in opposite directions with different imbalance weights.
  • the imbalance weights run on two shafts which are connected to one another via cardan shafts and a gearbox.
  • the drive motor and the gearbox do not vibrate with the screen box in this structure.
  • the assembly of the two circular vibration generators lead to the direction of the linear movement and thus also to the inclination of the ellipse.
  • a change in the inclination of the ellipse requires a mechanical change in the shaft positions, which, according to the prior art, is only possible at a standstill.
  • Mechanical elliptical screening machines are partly driven by countershaft or reversing gears.
  • An electric motor drives a main shaft, which is coupled to the auxiliary shaft via the gearbox.
  • the main shaft is connected to one imbalance, while the secondary shaft is connected to another imbalance.
  • the elliptical inclination can only be adjusted mechanically when the machine is at a standstill, for example by offsetting the shaft positions to one another.
  • the shifting of the shaft position (angle of rotation) is also called phase shift.
  • An adjustment is only possible in steps due to the division given by the teeth of the gear wheels and / or depending on the division of the fitting pieces.
  • the ellipse of an elliptical screening machine can be achieved according to the prior art by a phase shift of the opposing shafts, a change in the center of gravity of the imbalance weights to the associated shaft center, a change in the mass of the imbalance weights, or by a change in the speeds of the shafts and their speed ratio.
  • the disadvantage here is that these measures can only be carried out when the machine is at a standstill.
  • a phase shift of the opposing shafts is also possible by means of second drive motors, each motor driving a shaft.
  • the motor can have a frequency converter for setting the speed.
  • incremental encoders are necessary which detect the angular changes of the two shafts and coordinate the two drive motors so that both shafts rotate at the same angular speed in opposite directions.
  • the phase position can be changed electronically by briefly rotating one shaft faster than the other, so that they are rotated relative to each other. After the phase shift has taken place, which is recorded by the incremental encoder, the shafts rotate again at the same speed.
  • the alignment of the ellipse changes due to the phase shift.
  • the disadvantage here is the very high expenditure due to the arrangement of two electric motors, each with a frequency converter and, in addition, an incremental encoder and the control.
  • the object of the invention is to provide a screening machine and a method for operating a screening machine, with an especially continuous adjustment of the elliptical inclination being made possible with only one drive motor, even during operation.
  • controllable screening machine comprising at least one screen box and a drive unit, by means of which the screen box can be made to vibrate
  • the drive unit having a drive motor which drives two counter-rotating drive shafts each with at least one unbalanced mass, with the drive motor having the first drive shaft as the main shaft drives and the second drive shaft is coupled as a secondary shaft via a kinematic chain with the main shaft, it is that the kinematic chain has an adjusting element, by means of which the relative phase position of the secondary shaft can be changed and fixed with respect to the main shaft.
  • kinematic chain means that the main shaft and the auxiliary shaft are coupled to one another to the extent that a rotation of the main shaft simultaneously causes the auxiliary shaft to rotate in opposite directions, the main shaft and the auxiliary shaft are thus kinematically coupled.
  • an adjusting element is integrated into this kinematic chain, by means of which the relative phase position of the secondary shaft with respect to the main shaft can be changed and fixed.
  • the relative phase position of the secondary shaft with respect to the main shaft By changing the relative phase position of the secondary shaft with respect to the main shaft, the relative phase position of the two unbalanced masses to one another is changed at the same time and the alignment of the resulting ellipse of the vibration excitation of the screen box is thereby changed.
  • the adjustment element integrated in the kinematic chain With the adjustment element integrated in the kinematic chain, the alignment of the ellipse of the vibration excitation can be changed and adapted to the requirements.
  • the adjusting element is preferably formed by a clutch, in particular a friction clutch or a dog clutch, and / or a speed superimposed gear. It when the adjusting element is formed by a speed superposition gear is particularly advantageous.
  • phase position of the rotation of the two drive shafts with respect to one another can thus be changed by means of the speed superposition gear.
  • the speed superposition gear is also the possibility of changing the ratio of the rotational speed of the two drive shafts by means of the speed superimposition gear so that both shafts can rotate both at the same speed and at different angular speeds.
  • the elliptical oscillation of the screening machine can be changed with regard to the position of the main axis as well as with regard to the ratio of the main to the minor axis of the ellipse.
  • the adjustment of the speed superimposition gear can be done mechanically as well as electronically.
  • a mechanical adjustment for example in the case of a planetary gear, the outer sun gear is stopped, allowed to run freely or moved in a braked manner by braking intervention.
  • a friction gear with a bevel gear the position of the two gears is changed to one another, which changes the transmission ratio.
  • electronic adjustment this is done with the help of sensors and actuators.
  • the adjustment can take place both during operation and at a standstill.
  • the adjusting element is preferably formed by a speed superposition gear which contains an additional, fixed gear ratio for a variable gear part.
  • the speed superposition gear can contain an additional, fixed gear ratio. If the variable transmission part can only throttle the output speed, the fixed gear ratio enables the total output speed to be greater than the input speed.
  • Speed superimposition gear in particular be a planetary gear and / or a worm gear and / or a friction gear with a bevel gear.
  • the kinematic chain between the main shaft and the auxiliary shaft has at least two reversing gears and / or at least one countershaft gear.
  • the arrangement of two reversing gears and / or a countershaft gear ensures the opposite direction of rotation of the secondary shaft with respect to the main shaft.
  • the drive unit with drive motor and / or a speed superimposition gear and / or optional further gear with the associated shafts for driving the two counter-rotating drive shafts are completely or partially rigidly coupled to the screen box or decoupled from the screen box
  • the drive unit made up of the drive motor, speed superimposition gear, optional further gear units and the associated shafts for driving the two counter-rotating drive shafts can be completely or partially decoupled from the screen box. Cardan shafts then enable, for example, the introduction of force from the stationary components to the vibrating parts.
  • the drive unit can be wholly or partially connected to the screen box and thus oscillate with the elliptical oscillation.
  • the two drive shafts or the adjustment shaft of the speed superposition gear each have an incremental encoder for detecting the changes in angle of the two drive shafts or the adjustment shaft, a speed superposition gear in the kinematic chain being controlled or regulated as a function of the signals from the incremental encoder (s).
  • a speed superposition gear in the kinematic chain being controlled or regulated as a function of the signals from the incremental encoder (s).
  • the speed superposition gear and thus the relative phase position of the auxiliary shaft with respect to the main shaft can thus be dependent on the angular positions of the drive shafts and / or the drive shafts detected by means of the incremental encoder
  • Adjusting shaft of the speed superposition gear can be controlled in an open control loop or alternatively controlled in a closed control loop.
  • the unbalanced masses of the two drive shafts can be identical or different.
  • the drive motor has a controller, in particular with a frequency converter, by means of which the speed of the two drive shafts is controlled or regulated.
  • the speed of the two drive shafts can thus be controlled in an open control loop or alternatively controlled in a closed control loop.
  • the screening machine preferably has a servomotor, by means of which the adjusting element is actuated for changing and setting the relative phase position of the secondary shaft with respect to the main shaft.
  • the change and adjustment of the relative phase position of the secondary shaft with respect to the main shaft can take place with the screening machine running and / or with the screening machine at a standstill.
  • the drive unit having a drive motor which drives two counter-rotating drive shafts each with at least one unbalanced mass by the drive motor drives the first drive shaft as the main shaft and the second drive shaft is coupled to the main shaft as a secondary shaft via a kinematic chain, it is that the relative phase position of the secondary shaft with respect to the main shaft can be changed and fixed by means of an adjustment element in the kinematic chain.
  • kinematic chain means that the main shaft and the auxiliary shaft are coupled to one another to the extent that a rotation of the main shaft simultaneously causes the auxiliary shaft to rotate in opposite directions, the main shaft and the auxiliary shaft are thus kinematically coupled.
  • an adjusting element is integrated into this kinematic chain, by means of which the relative phase position of the secondary shaft with respect to the main shaft can be changed and fixed.
  • the relative phase position of the secondary shaft with respect to the main shaft By changing the relative phase position of the secondary shaft with respect to the main shaft, the relative phase position of the two unbalanced masses to one another is changed at the same time and the alignment of the resulting ellipse of the vibration excitation of the screen box is thereby changed.
  • the adjustment element integrated in the kinematic chain With the adjustment element integrated in the kinematic chain, the alignment of the ellipse of the vibration excitation can be changed and adapted to the requirements.
  • the relative phase position of the secondary shaft with respect to the main shaft can preferably be changed and fixed by means of a clutch, in particular a friction clutch or a claw clutch, and / or by means of a speed superimposition gear.
  • the relative phase position of the rotation of the two drive shafts can be changed by means of a speed superposition gear in the kinematic chain.
  • the ratio of the rotational speeds of the two drive shafts can be changed and fixed by means of a speed superposition gear in the kinematic chain
  • phase position of the rotation of the two drive shafts with respect to one another can thus be changed by means of the speed superposition gear.
  • the speed superposition gear there is also the possibility of changing the ratio of the speed of rotation of the two drive shafts by means of the speed superposition gear so that both shafts can rotate at the same speed as well as at different angular speeds.
  • the elliptical oscillation of the screening machine can be changed with regard to the position of the main axis as well as with regard to the ratio of the main to the minor axis of the ellipse.
  • the adjustment of the speed superimposition gear can be done mechanically as well as electronically.
  • a mechanical adjustment for example in the case of a planetary gear, the outer sun gear is stopped, allowed to run freely or moved in a braked manner by braking intervention.
  • a friction gear with a bevel gear the position of the two gears is changed to one another, which changes the transmission ratio.
  • electronic adjustment this is done with the help of sensors and actuators.
  • the adjustment can take place both during operation and at a standstill.
  • the two drive shafts and / or an adjusting shaft of a speed superposition gear each have at least one incremental encoder for detecting the changes in angle of the two drive shafts and / or the adjusting shaft, with a speed superposition gear in the kinematic chain being controlled or regulated as a function of the signal (s) from the incremental encoder (s) becomes.
  • the relative angular position of the two drive shafts to one another and / or of the adjusting shaft of the speed superposition gear can thus be detected.
  • the speed superposition gear and thus the relative phase position of the secondary shaft with respect to the main shaft can thus be controlled in an open control loop or alternatively in a closed control loop depending on the angular positions of the drive shafts and / or the adjustment shaft of the speed superposition gear detected by means of the incremental encoder.
  • the unbalanced masses of the two drive shafts can be identical or different.
  • the drive motor has a controller, in particular with a frequency converter, by means of which the speed of the two drive shafts is controlled or regulated.
  • the speed of the two drive shafts can thus be controlled in an open control loop or alternatively controlled in a closed control loop.
  • the figures show a controllable screening machine with a screen box 1 which is connected to a foundation via springs 17 and to which two counter-rotating drive shafts 3, 4 are connected via bearings 8.
  • Each of the two drive shafts 3, 4 has two unbalanced masses 5, 6.
  • the unbalanced masses 5 of the first drive shaft 3 and the unbalanced masses 6 of the second drive shaft 4 are identical in terms of amount.
  • the center of gravity of the unbalanced masses 5, 6 is located away from the axis of rotation of the associated drive shafts 3, 4.
  • the first drive shaft 3 is connected to the main shaft 10 via a cardan shaft 9, while the second drive shaft 4 is connected to the auxiliary shaft 11 via another cardan shaft 9 ′.
  • the main shaft 10 leads to a Transfer case 12, which is also connected to a motor shaft 14 and a first connecting shaft 15.
  • the motor shaft 14 is connected to a drive motor 2 on the side facing away from the transfer case 12.
  • the auxiliary shaft 11 leads to a deflection gear 13 which connects the auxiliary shaft 11 at right angles to a second connecting shaft 16.
  • the first and second connecting shafts 15, 16 both open into a speed superposition gear 7.
  • the gear arrangement between the main shaft 10 and the auxiliary shaft 11 form a kinematic chain which couples the two shafts and causes the main shaft 10 and the auxiliary shaft 11 to rotate in opposite directions.
  • the drive motor 2 drives the motor shaft 14, which in the transfer case 12 transmits the rotation to the main shaft 10 and the first connecting shaft 15.
  • the main shaft 10 drives the first drive shaft 3 via the first cardan shaft 9, which sets the unbalanced masses 5 combined with it in rotation and thus exerts a first force on the screen box 1 via the bearings 8.
  • the rotation of the first connecting shaft 15 can be changed in the speed superposition gear 7, so that the second connecting shaft 16 rotates with the same or a different phase position in relation to the first connecting shaft 15.
  • the rotation is deflected at right angles to the auxiliary shaft 11 in order to drive the second drive shaft 4 via the second cardan shaft 9.
  • the unbalanced masses 6 combined with the second drive shaft 4 are set in rotation and thus a second force is exerted on the screen box 1 via the bearings 8.
  • the two drive shafts 3, 4 run parallel in opposite directions of rotation.
  • the two forces result in a resultant, elliptical oscillation of the sieve box 1 through their superposition.
  • the inclination of the main axis of the resultant ellipse with respect to the horizontal influences the advance of the material to be sieved.
  • the inclination of the main axis of the resulting ellipse can be changed by means of the speed superposition gear 7 by changing the phase position of the rotation of the first connecting shaft 15 relative to the second connecting shaft 16 and thus the two drive shafts 3, 4.
  • the adjusting shaft 7 ′ forms the connection for a knurled wheel and / or a servo motor and / or a geared motor with an incremental encoder for adjusting the speed superimposition gear 7.
  • the phase can be adjusted mechanically, electronically or in combination.
  • the adjustment can be made during operation or at a standstill.
  • the speed superposition gear 7 contains an additional, fixed gear ratio for the variable gear part.
  • the two drive shafts 3, 4 each have incremental encoders for detecting the changes in angle of the two drive shafts 3, 4. This allows the speed superposition gear 7 to be controlled in a closed control loop as a function of the signals from the incremental encoders.
  • the amplitude of the oscillation can be changed by the speed of the drive motor 2. As the speed increases, the vibration increases, while lower speeds cause smaller vibrations.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combined Means For Separation Of Solids (AREA)
EP19000069.5A 2019-02-06 2019-02-06 Tamiseur réglable et procede d'utilisation d'un tamiseur réglable Pending EP3693090A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19000069.5A EP3693090A1 (fr) 2019-02-06 2019-02-06 Tamiseur réglable et procede d'utilisation d'un tamiseur réglable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19000069.5A EP3693090A1 (fr) 2019-02-06 2019-02-06 Tamiseur réglable et procede d'utilisation d'un tamiseur réglable

Publications (1)

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EP3693090A1 true EP3693090A1 (fr) 2020-08-12

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EP19000069.5A Pending EP3693090A1 (fr) 2019-02-06 2019-02-06 Tamiseur réglable et procede d'utilisation d'un tamiseur réglable

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113042363A (zh) * 2021-03-05 2021-06-29 周万祥 一种具备提高除杂效率缩短大米加工周期的大米除杂装置
CN114011708A (zh) * 2021-11-17 2022-02-08 安徽亚珠金刚石股份有限公司 一种人造单晶金刚石分级筛选装置及其工作方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE945917C (de) * 1954-07-21 1956-07-19 Steinmueller Gmbh L & C Unwuchtantrieb fuer Foerdereinrichtungen
DE1289397B (de) * 1966-04-25 1969-02-13 Johnson Louis W Ruettelsiebvorrichtung
DE2356542A1 (de) 1973-11-13 1975-05-15 Ibag Vertrieb Gmbh Schwingungserzeugender antrieb fuer aufbereitungsmaschinen
DE7613723U1 (de) * 1975-06-16 1976-12-16 Babbitless, Paris Schwingantrieb
DE7811967U1 (de) 1978-04-20 1978-08-17 Ibag Vertrieb Gmbh, 6730 Neustadt Antrieb fuer schwingmaschinen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE945917C (de) * 1954-07-21 1956-07-19 Steinmueller Gmbh L & C Unwuchtantrieb fuer Foerdereinrichtungen
DE1289397B (de) * 1966-04-25 1969-02-13 Johnson Louis W Ruettelsiebvorrichtung
DE2356542A1 (de) 1973-11-13 1975-05-15 Ibag Vertrieb Gmbh Schwingungserzeugender antrieb fuer aufbereitungsmaschinen
DE7613723U1 (de) * 1975-06-16 1976-12-16 Babbitless, Paris Schwingantrieb
DE7811967U1 (de) 1978-04-20 1978-08-17 Ibag Vertrieb Gmbh, 6730 Neustadt Antrieb fuer schwingmaschinen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
TANDLER ZAHNRAD- UND GETRIEBEFABRIK GMBH: "Drehzahlüberlagerungs- getriebe Speed Modulation Gearboxes", 5 May 2016 (2016-05-05), Bremen, pages 1 - 20, XP055612136, Retrieved from the Internet <URL:https://www.tandler.de/wp-content/uploads/2009/06/dueg.pdf> [retrieved on 20190812] *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113042363A (zh) * 2021-03-05 2021-06-29 周万祥 一种具备提高除杂效率缩短大米加工周期的大米除杂装置
CN114011708A (zh) * 2021-11-17 2022-02-08 安徽亚珠金刚石股份有限公司 一种人造单晶金刚石分级筛选装置及其工作方法

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