EP0747136A1 - Tamis à tambour - Google Patents

Tamis à tambour Download PDF

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Publication number
EP0747136A1
EP0747136A1 EP96890095A EP96890095A EP0747136A1 EP 0747136 A1 EP0747136 A1 EP 0747136A1 EP 96890095 A EP96890095 A EP 96890095A EP 96890095 A EP96890095 A EP 96890095A EP 0747136 A1 EP0747136 A1 EP 0747136A1
Authority
EP
European Patent Office
Prior art keywords
cages
drum
cage
sieve
machine according
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.)
Withdrawn
Application number
EP96890095A
Other languages
German (de)
English (en)
Inventor
Herbert Hausmann
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.)
Technisches Buero fur Maschinenbau Ing Herbert Hausmann
Original Assignee
Technisches Buero fur Maschinenbau Ing Herbert Hausmann
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 Technisches Buero fur Maschinenbau Ing Herbert Hausmann filed Critical Technisches Buero fur Maschinenbau Ing Herbert Hausmann
Publication of EP0747136A1 publication Critical patent/EP0747136A1/fr
Withdrawn legal-status Critical Current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
    • B07B1/18—Drum screens
    • B07B1/22—Revolving drums
    • 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
    • B07B1/18—Drum screens
    • B07B1/22—Revolving drums
    • B07B1/26—Revolving drums with additional axial or radial movement of the drum
    • 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
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/48—Stretching devices for screens
    • B07B1/485—Devices for alternately stretching and sagging screening surfaces

Definitions

  • the invention relates to a drum sieve machine with a sieve drum rotatably mounted about an essentially vertical axis and rotating via a rotary drive, which is provided with a sieve covering on its circumference.
  • Such drum screening machines with a substantially vertical axis are already known.
  • the material to be sieved is fed from above to the rotating sieve drum and evenly distributed on the inside of the sieve surface via a spreading disc, the material being pressed being pressed against the sieve surface by the centrifugal force resulting from the rotation.
  • Hiebei it is known to shake the sieve drum in addition to the rotational movement in the horizontal direction, so that the material to be screened lifts off the sieve at certain points and the actual sieving effect is brought about by the throwing movement thus created.
  • the screenings are transported downwards by gravity.
  • Drum sieving machines with a sieve drum rotatably mounted about an essentially vertical axis have the advantage over drum sieving machines in which the axis of the sieve drum runs horizontally or inclined to the horizontal that the material to be sieved does not only rest on a portion of the sieve surface by gravity, but rather is pressed against the entire screen surface by the high centrifugal force, so that the throughput is increased.
  • the high centrifugal force has a disadvantageous effect, since the grain particles pressed against the screen covering with high force become jammed in the mesh openings of the screen covering and block them.
  • the force component that results from the shaking movement of the sieve drum and is superimposed on the centrifugal force is not sufficient to pull these grain particles out of the mesh openings again.
  • the throughput decreases in proportion to the open screen area lost as a result.
  • the sieve drum axis of which is arranged horizontally or slightly inclined to the horizontal
  • the drum axis horizontally. is arranged slightly inclined to the horizontal
  • the two screening drums are at a radial distance from one another are driven in opposite directions, the inner drum having larger mesh openings than the outer drum.
  • the material to be screened is fed into the inner drum, where compacts whose size exceeds that of the mesh openings of this inner drum are excreted and therefore do not reach the smaller mesh openings of the outer drum.
  • drum sieve machine consisting of two sieve drums
  • the sieve drums touch each other along their circumference, the effective passage cross section of the mesh openings being able to be changed by a relative displacement of the two sieve drums.
  • Drum sieving machines of this type with a sieve drum axis which runs horizontally or slightly inclined to the horizontal have only a low specific throughput, since only about a quarter of the entire sieve surface is in contact with the material to be sieved at the same time.
  • the present invention has set itself the task of improving a drum screening machine of the type described in the introduction in such a way that high specific screening capacities can be achieved even with difficult-to-screen material.
  • the invention proposes that the screen covering, which is made of an elastic material in a manner known per se, is fixed to support elements which run approximately parallel to the axial direction, preferably rod-shaped, and that a device for periodically changing the distance between adjacent support elements transversely to them Longitudinal direction is provided.
  • the screen covering made of elastic material is alternately tensioned and relaxed at certain points, which results in a high self-cleaning effect and blockages in the screen openings are eliminated.
  • the screening drum has two concentrically mounted cages, the screen covering being alternately fixed on the rod-shaped supporting elements of the two cages, and a device for generating a relative movement between the two cages is provided.
  • This relative movement between the two cages and thus between the adjacent rod-shaped support elements located on different cages can either run in the circumferential direction of the screening drum or radially, or a combination of these two directions of movement is also possible.
  • the distance between adjacent support elements is periodically reduced and enlarged by this relative movement, which ensures the alternating tensioning and relaxation of the screen covering made of elastic material.
  • One of the two cages is expediently driven via the rotary drive and the other of the two cages is operatively connected both to the one cage and to the device for generating a relative movement between the two cages. This results in a rotation of both cages forming part of the sieve drum to generate the required centrifugal force, as well as the desired relative movement between the two cages.
  • the arrangement can, for example, be such that the two cages are rotatably mounted on a crankshaft which is driven by a further rotary drive. Because the two cages are arranged on different arms of the crankshaft, a relative movement between the two cages is achieved as a result of the further rotary drive of this crankshaft.
  • the cage driven by the rotary drive can also be coupled to the other cage by means of a relative rotary movement between the two cages, the other cage, that is to say not driven by the rotary drive, being connected to a device for exciting a rotary vibration which again ensures the relative movement between the two cages.
  • This device for exciting a torsional vibration can, for example, have a driven eccentric disk which is coupled to the rotary drive via an elastic belt drive.
  • the device for exciting a torsional vibration can be formed by at least one imbalance exciter rotatably arranged on the other cage, that is to say not driven by the rotary drive.
  • the device for exciting a torsional vibration can also be formed by a rotating eccentric drive.
  • the device for periodically changing the distance between adjacent support elements on a cage driven by the rotary drive has lever systems on which some of the support elements, preferably every second support element, are fixed and which are fixed during the rotary movement of the Cages interact with a stationary cam track causing their pivoting movement. If the cage rotates, the fact that the lever systems slide along the cam track, for example via slide rollers, changes the position of the support elements fixed to these lever systems, which again results in a relative movement between these support elements and further support elements for the screen covering, preferably fixed to the cage and therefore this screen surface is alternately tensioned and relaxed.
  • the lever systems, in particular the slide rollers mentioned are always brought to bear on the slide, for example by means of springs.
  • FIG. 1 shows a longitudinal section through a first embodiment of the drum screening machine according to the invention and
  • FIG. 2 shows a section along the line AA 1 shows a longitudinal section through a second embodiment of the drum screening machine according to the invention and
  • FIG. 4 shows a section along the line AA in FIG. 3.
  • FIGS. 5 and 6 show corresponding cross sections in FIG alternating tensioning and relaxation of the screen covering made of an elastic material.
  • 7 to 9 show in cross sections corresponding to those in FIGS. 2 and 4 further exemplary embodiments of the drum screening machine according to the invention.
  • the drum screening machine shown in FIGS. 1 and 2 has a screening drum consisting of two cages 1, 2, which are provided with rod-shaped support elements 6, on which a screen covering 9 made of an elastic material is fastened. As can be seen in particular from FIG. 2, this screen covering is alternately fixed on a rod-shaped support element 6 of one cage 1 and on a rod-shaped support element 6 of the other cage 2.
  • the two cages 1, 2 are arranged on a shaft 3 which, in the exemplary embodiment according to FIGS. 1 and 2, is designed as a crankshaft, the two cages being supported on different crank arms.
  • the crankshaft 3 is mounted in a machine frame 4.
  • the material to be sieved is supplied in the direction of arrow 10 from above via a spreading plate 5 which rotates with the crankshaft 3 and which distributes the material to be sieved uniformly over the circumference of the sieve covering 9 in the direction of the arrows 13.
  • the cage 1 is driven by a motor via a belt drive 7.
  • the crankshaft 3 is set in rotation via a further belt drive 8.
  • the two cages 1, 2 shift in the radial direction relative to one another, as a result of which the distance between the rod-shaped support elements 6 of one cage 1 and the adjacent rod-shaped support elements 6 of the other cage 2 changes periodically, and the sieve covering, which is made of elastic material, alternately tensions and relaxed, as a result of which the material to be screened, as indicated by the arrows 13, stands out from the screen covering 9 and is thrown back onto the screen covering 9 by centrifugal force. Screening material jammed in the screen openings is removed from the screen openings.
  • the screenings are transported downwards by gravity, the screen passage (arrows 11) is combined outside the screen drum 1, the screen overflow (arrows 12) emerges from the underside of the screen drum.
  • the embodiment according to FIGS. 3 and 4 differs from the embodiment according to FIGS. 1 and 2 in that the driven cage 1 is arranged in a rotationally fixed manner on the linear shaft 3, whereas the other cage 2 is rotatably mounted on this shaft 3 .
  • the two cages 1, 2 are coupled to one another via springs 17 (see FIG. 2), the spring action also being provided by the screen covering 9 elastic material is supported.
  • the rotation of the shaft 3 is effected via a motor-driven eccentric pulley 14, whereby a torsional vibration (arrow 16) is generated which is superimposed on the rotary movement (arrow 15).
  • a torsional vibration (arrow 16) is generated which is superimposed on the rotary movement (arrow 15).
  • the spring force of the springs 17 and the speed of the eccentric disc 14 With appropriate coordination of the rotating masses (cages 1 and 2), the spring force of the springs 17 and the speed of the eccentric disc 14, the two cages 1 and 2 are excited in opposite directions to torsional vibrations, as a result of which the distances between adjacent support elements fastened to the cages 1 and 2 6 alter alternating. 5 and 6, the alternate tensioning and relaxing of the screen covering is shown.
  • the tensioned state is denoted by 9a, the relaxed state by 9b.
  • the two cages 1, 2, as in the embodiment according to FIGS. 3 and 4 are arranged on a linear shaft 3, the cage 2 being connected to this shaft in a rotationally fixed manner , whereas the cage 1 is rotatably mounted on the shaft.
  • the shaft 3 is not driven by an eccentric pulley, as in the embodiment according to FIGS. 3 and 4, but by a pulley located centrally on the shaft 3, as a result of which a uniform rotary movement for generating the centrifugal force is achieved.
  • the relative movement between the two cages 1, 2 is effected in the embodiment according to FIG. 7 by unbalance exciters 18, which are rotatably mounted on approaches of the cage 1.
  • the unbalance exciter 18 consist of motor-driven unbalance weights, with the current being supplied to the motors, for example, via slip rings.
  • the unbalance exciter generates a torsional vibration which is superimposed on the rotational movement of the shaft 2 and by which the cage 1 is also rotated about the shaft 3 on which it is rotatably mounted.
  • the embodiment according to FIG. 8 differs from the embodiment according to FIG. 7 in that the two cages 1, 2, i.e. the cage 1 rotatably mounted on the shaft 3 and the cage 2 rotatably connected to the shaft 3, via an eccentric drive 19 are coupled together, which is driven by a separate motor mounted on the cage 1.
  • the cage 1 By coupling the two cages 1, 2 via the eccentric drive, the cage 1 is also moved during the rotational movement of the cage 2 which is fixedly connected to the shaft 3.
  • a relative displacement between the two cages 1, 2 takes place in the desired manner during their rotational movement and thus between the support elements for the screen covering arranged on the two cages, as a result of which the latter is alternately tensioned and relaxed and thereby clogs the Sieve openings are eliminated.
  • only a single cage 1 connected to the shaft 3 in a rotationally fixed manner is provided.
  • the support elements 6a are attached to the free end of lever systems 20 consisting of an angle lever, the support elements 6b are firmly connected to the cage 1.
  • the lever systems 20 are pivotally mounted about a pivot point 23 on the cage 1.
  • the end of the lever systems 20 opposite the supporting elements 6a interacts via slide rollers 24 with a fixed, circular cam track 22 which is concentric with the shaft 3, the slide rollers 24 being pressed against the cam track 22 by springs 21.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
EP96890095A 1995-06-07 1996-06-04 Tamis à tambour Withdrawn EP0747136A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT967/95 1995-06-07
AT0096795A AT402903B (de) 1995-06-07 1995-06-07 Trommelsiebmaschine

Publications (1)

Publication Number Publication Date
EP0747136A1 true EP0747136A1 (fr) 1996-12-11

Family

ID=3503930

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96890095A Withdrawn EP0747136A1 (fr) 1995-06-07 1996-06-04 Tamis à tambour

Country Status (2)

Country Link
EP (1) EP0747136A1 (fr)
AT (1) AT402903B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2467526A (en) * 2009-02-02 2010-08-04 Andrew Baughan Flexible rotary mesh filter
CN106362938A (zh) * 2016-10-26 2017-02-01 济宁市丰鹏工程设备有限公司 一种旋转式物料筛分装置
CN107999370A (zh) * 2017-12-22 2018-05-08 农业部南京农业机械化研究所 一种自清理防堵塞花生分级装置
EP3339515A1 (fr) * 2016-12-23 2018-06-27 Javier Aracama Martinez De Lahidalga Godet et procédé de tamisage d'un matériau inerte
WO2020025673A1 (fr) * 2018-07-31 2020-02-06 Vogelsang Gmbh & Co. Kg Séparateur pour le traitement des eaux usées avec corps de tamis mobile
CN113441382A (zh) * 2021-03-17 2021-09-28 千年舟新材科技集团股份有限公司 一种竹筒筛分机
CN114798195A (zh) * 2022-06-24 2022-07-29 潍坊市凯隆机械有限公司 一种应用于金属零部件的振动气筛装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE840792C (de) * 1944-06-05 1952-06-05 Nordberg Manufacturing Co Verfahren und Vorrichtung zum Sichten von Gut
EP0158036A1 (fr) * 1984-03-31 1985-10-16 Hein, Lehmann Aktiengesellschaft Tamis à tambour
DE3722930A1 (de) * 1987-07-10 1989-01-19 Binder Co Ag Trommelsieb

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4027111A1 (de) * 1990-08-28 1992-03-05 Lindemann Maschfab Gmbh Trommelsieb sowie flachsieb
DE4205021C1 (en) * 1992-02-19 1993-08-19 Bernhard Farwick Gmbh & Co Kg, 4740 Oelde, De Double sieve drum for avoiding material collection on interconnection elements - comprises long inner drum projecting from outer contra rotating drum of differing dia, and drum interspace free from struts, spokes of direct connections

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE840792C (de) * 1944-06-05 1952-06-05 Nordberg Manufacturing Co Verfahren und Vorrichtung zum Sichten von Gut
EP0158036A1 (fr) * 1984-03-31 1985-10-16 Hein, Lehmann Aktiengesellschaft Tamis à tambour
DE3722930A1 (de) * 1987-07-10 1989-01-19 Binder Co Ag Trommelsieb

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2467526A (en) * 2009-02-02 2010-08-04 Andrew Baughan Flexible rotary mesh filter
WO2010086670A1 (fr) * 2009-02-02 2010-08-05 Andrew Baughan Tambour de filtre rotatif possédant un crible de filtration élastique souple
CN106362938A (zh) * 2016-10-26 2017-02-01 济宁市丰鹏工程设备有限公司 一种旋转式物料筛分装置
EP3339515A1 (fr) * 2016-12-23 2018-06-27 Javier Aracama Martinez De Lahidalga Godet et procédé de tamisage d'un matériau inerte
CN107999370A (zh) * 2017-12-22 2018-05-08 农业部南京农业机械化研究所 一种自清理防堵塞花生分级装置
CN107999370B (zh) * 2017-12-22 2024-02-09 农业部南京农业机械化研究所 一种自清理防堵塞花生分级装置
WO2020025673A1 (fr) * 2018-07-31 2020-02-06 Vogelsang Gmbh & Co. Kg Séparateur pour le traitement des eaux usées avec corps de tamis mobile
CN113441382A (zh) * 2021-03-17 2021-09-28 千年舟新材科技集团股份有限公司 一种竹筒筛分机
CN114798195A (zh) * 2022-06-24 2022-07-29 潍坊市凯隆机械有限公司 一种应用于金属零部件的振动气筛装置

Also Published As

Publication number Publication date
AT402903B (de) 1997-09-25
ATA96795A (de) 1997-02-15

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