EP1740319A1 - Vibrating sieve machine and method for operation of a vibrating sieve machine - Google Patents
Vibrating sieve machine and method for operation of a vibrating sieve machineInfo
- Publication number
- EP1740319A1 EP1740319A1 EP04723490A EP04723490A EP1740319A1 EP 1740319 A1 EP1740319 A1 EP 1740319A1 EP 04723490 A EP04723490 A EP 04723490A EP 04723490 A EP04723490 A EP 04723490A EP 1740319 A1 EP1740319 A1 EP 1740319A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- imbalance
- unbalance
- excitation
- machine
- exciters
- 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.)
- Granted
Links
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
Definitions
- Vibration screening machines are used in the construction industry to classify grit or gravel according to the principle of "throwing screening".
- the vibration screening machine is designed with respect to the screening surface and screening excitation in such a way that it provides optimal results with regard to the screening performance for a particular feed material that is primarily used If the composition (recipe) of the feed material changes, the plant capacity can decrease significantly and the sieving results will be less than optimal. This is a problem especially with hot vibrating sieves in asphalt plants, because different grit depends on the desired asphalt quality -Recipes are to be processed and short-term conversion work on the screening machine due to their arrangement directly above the hot mineral silo are excluded.
- a first aspect of the invention relates to a vibrating screening machine with a single or with several unbalance exciters (exciter shafts), preferably with two self-synchronizing imbalance exciters.
- the excitation force, the excitation frequency and / or the excitation angle can be set during operation of the machine, preferably independently of one another.
- Such a vibrating screening machine can also be designed as an "intelligent", self-optimizing vibrating screening machine by the machine automatically varying one or more of the aforementioned parameters during operation, determining their influence on the screening result and thus determining an optimal parameter constellation for the respective feed material. It is preferred that the excitation force, the excitation frequency and / or the excitation direction are infinitely adjustable so that a particularly sensitive control intervention is possible. In a preferred embodiment of the
- Vibrating screening machine has at least one unbalance exciter with two unbalance weights with a common axis of rotation, the angle of rotation of which relative to one another can be changed during operation of the machine.
- the unbalance of the unbalance exciter and thus also the excitation force can preferably be set between zero (both unbalanced weights lie exactly opposite one another) and a maximum value (both unbalanced weights are arranged at the same initial position).
- the rotational moment of inertia remains unchanged when the unbalance is changed.
- this has at least one unbalance exciter with an unbalance weight, the center of gravity of which can be changed during operation of the machine to adjust the unbalance and thus the excitation force, and preferably between zero (the center of gravity of the unbalance weight also falls the axis of rotation together) and a maximum value (maximum possible distance between the axis of rotation and the center of gravity of the unbalance weight).
- the vibrating screening machine has at least two imbalance exciter arrangements or units, each with at least two imbalance exciters, the excitation angle at least one, preferably all imbalance exciter arrangements being changeable to enable adjustment of the resulting total excitation force generated jointly by them.
- the excitation angle of the at least one imbalance exciter arrangement can be changed by changing the phase positions of the imbalance exciters of this imbalance exciter arrangement relative to one another and / or by changing the position of at least one of the imbalance exciters relative to the machine body. It is also preferred if the
- Vibrating sieve machine has several, preferably exactly two, unbalance exciter arrangements, each with exactly two unbalance exciter, the two unbalance exciters of a first imbalance exciter arrangement being synchronized or synchronizable for synchronous rotation in a common first direction of rotation and the two unbalance exciters of a second imbalance exciter arrangement for synchronous rotation second direction of rotation opposite to the first direction of rotation can be synchronized or synchronized.
- the imbalance exciters of the first imbalance exciter arrangement and the second imbalance exciter arrangement are synchronized or can be synchronized with one another.
- phase position of the two imbalance exciters of the first imbalance exciter arrangement can be changed relative to one another and the phase position of the two imbalance exciters of the second imbalance excitation arrangement can be changed relative to one another, in order to change the respective excitation angle of the first and the second imbalance excitation arrangement and thus to enable adjustment of the two imbalance excitation arrangements together generated resulting total excitement.
- Vibrating screening machines of this type in which the change in excitation force is achieved by shifting the phase position of several unbalance exciters relative to one another, have the advantage that simple and inexpensive unbalance exciters can be used and that there is no change in the rotational moments of inertia when the excitation force is set, which is preferred is.
- the vibrating sieve machine has at least two unbalance exciters
- the position of at least one of the unbalance exciters, and in particular all unbalance exciters can be changed in relation to the machine body during operation, in order to adjust the excitation angle of the entire exciter arrangement and thus the throwing distance of the screen deck in combination with the excitation force or the vibration amplitude. This is particularly advantageous for two self-synchronizing unbalance exciters.
- the vibrating screening machine is preferably equipped with a machine control, in which the excitation frequency, the excitation force or imbalance, the excitation angle and / or the application quantity per unit of time are stored for different input materials and can be called up again at a later time for the operation of the vibrating screening machine with such a feed material and with which the vibrating screening machine can preferably be automatically set for operation with the stored values.
- a machine control in which the excitation frequency, the excitation force or imbalance, the excitation angle and / or the application quantity per unit of time are stored for different input materials and can be called up again at a later time for the operation of the vibrating screening machine with such a feed material and with which the vibrating screening machine can preferably be automatically set for operation with the stored values.
- the vibrating screening machine has measurement technology for automatically measuring and evaluating the vibrations of at least one screening deck, preferably all screening decks, and / or the machine body of the vibrating screening machine, and its control system is also designed such that an automatic one depending on the evaluation results Control intervention can take place with respect to the excitation frequency, the excitation force, the excitation angle and / or the application quantity.
- suitable evaluation algorithms can be used to identify an overload of the screen deck with "carpet formation" and suitable control interventions can be carried out automatically, for example the vibration amplitude can be increased by increasing the excitation force or the feed quantity can be reduced.
- the invention relates to a system with a vibrating sieve machine according to the first aspect of the invention.
- the system of the vibratory sieve machine has sieve material silos connected downstream and measurement technology with which fill levels in at least two of the sieve material silos, preferably in all silos, or the mass or volume flows of those in the.”
- Incoming silo flows can be automatically measured and evaluated.
- the machine control system is designed in such a way that, depending on the evaluation results, an automatic control intervention Regarding the excitation frequency, the excitation force, the excitation angle and / or the amount of feed per unit time.
- a third aspect of the invention relates to
- a fourth aspect of the invention relates to a method for operating a vibrating screening machine with one or more unbalance exciters, and preferably for operating a vibrating screening machine according to the first aspect of the invention or a system according to the second aspect of the invention.
- the excitation force, the excitation frequency and / or the excitation angle is set during the operation of the machine, which is preferably done independently of one another. This results in the advantageous effects already set out in the first aspect.
- the excitation force is preferably set by changing the unbalance of at least one unbalance exciter, which is done by changing the angular position of two unbalance weights with a common axis of rotation, by changing the center of gravity of an unbalance weight from its axis of rotation and / or by feeding or discharging from rivers liquid to a container rotating about an axis of rotation or away from it. It is also preferred to set the excitation force in vibrating screening machines with at least two imbalance exciter arrangements, each with at least two imbalance exciters (exciter shafts), by changing the excitation angle of one or more imbalance exciter arrangements and thereby changing the resulting total excitation force generated jointly by these imbalance exciter arrangements. This happens with advantage that the
- the phase position of the unbalance exciter relative to at least one unbalance exciter arrangement is changed and / or by changing the position of at least one of the unbalance exciters relative to the machine body.
- Vibration screening machines with two imbalance exciter arrangements, each with two imbalance exciters (ie with four excitation shafts) are preferably operated in such a way that the two imbalance exciters of the first imbalance exciter arrangement are rotated synchronously with one another in a common first direction of rotation and the two imbalance exciters of the second imbalance exciter arrangement are synchronized with one another in a common second , the first direction of rotation are rotated in the opposite direction of rotation, the imbalance exciters of the first imbalance exciter arrangement being rotated synchronously with the imbalance exciters of the second imbalance exciter arrangement and the phase position of the two imbalance exciters of the first imbalance excitation arrangement relative to one another and the phase position of the two imbalance exciter arrangements of the second imbalance excitation arrangement relative to one another Change the excitation angle of the two
- vibrating screening machines of this type have the advantage that the unbalance exciters have a simple and inexpensive construction without can have mechanical weight adjustment and the rotational moments of inertia remain constant when adjusting the excitation force.
- the position of at least one of the imbalance exciters, preferably of all imbalance exciters, relative to the machine body and thus relative to the screen decks is changed in a vibrating screening machine with at least two preferably self-synchronizing imbalance exciters for setting the excitation angle during operation. In this way, the “throwing distance” of the screening decks of the vibrating screening machine can be set in a targeted manner.
- a vibrating sieve machine with at least one unbalance exciter with adjustable unbalance is started up in such a way that the unbalance exciter is first brought to a certain rotational frequency without unbalance or with a less than the unbalance intended for operation, and then the unbalance is increased , the rotational frequency preferably being increased further to the desired operating rotational frequency.
- the unbalance exciter is first brought to a certain rotational frequency without unbalance or with a less than the unbalance intended for operation, and then the unbalance is increased , the rotational frequency preferably being increased further to the desired operating rotational frequency.
- the total excitation force of which is adjustable, for example by changing the excitation angle of the individual imbalance excitation arrangements, it is preferred to effect the above-described start-up and shutdown processes by appropriate adjustment of the total excitation force.
- FIG. 1 shows a schematic representation of a system according to the invention with a first vibrating screening machine according to the invention
- Fig. 2 shows a vertical section in the longitudinal direction through a second vibrating screening machine according to the invention.
- the unbalance exciter 5 (exciter shaft) has two imbalance weights 8a, 8b with a common axis of rotation, the angular position of which, via a hydraulically actuated adjusting mechanism arranged in the exciter shaft, is infinitely variable between a neutral position (weights lie opposite one another) and a maximum unbalance position ( Weights are arranged in an identical circumferential position) can be changed to adjust the unbalance.
- the entire exciter arrangement 11 can be pivoted about a pivot point D with the aid of two double-acting hydraulic cylinders 12 with respect to the machine body which supports the screen decks 4, so that the excitation angle of the exciter unit 11 with respect to the screen decks 4 can be adjusted continuously. Together with the stepless adjustability of the unbalance exciter speed and the unbalance, this results in a vibrating screening machine 3 in which the excitation force, the excitation frequency and the excitation angle and thus also the oscillation frequency, oscillation amplitude and throwing distance can be set continuously and independently in a wide range.
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CH2004/000186 WO2005092522A1 (en) | 2004-03-26 | 2004-03-26 | Vibrating sieve machine and method for operation of a vibrating sieve machine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1740319A1 true EP1740319A1 (en) | 2007-01-10 |
EP1740319B1 EP1740319B1 (en) | 2008-01-16 |
Family
ID=34957108
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04723490A Expired - Lifetime EP1740319B1 (en) | 2004-03-26 | 2004-03-26 | Vibrating sieve machine and method for operation of a vibrating sieve machine |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1740319B1 (en) |
CN (1) | CN100534635C (en) |
DE (1) | DE502004006001D1 (en) |
WO (1) | WO2005092522A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103128050A (en) * | 2013-03-15 | 2013-06-05 | 东兴市怡诚食品开发有限公司 | Multistage linear screening machine |
LU100478B1 (en) * | 2017-10-13 | 2019-05-22 | Thyssenkrupp Ag | Screening system with vibration-node-arranged vibration systems |
CN109513610A (en) * | 2018-11-10 | 2019-03-26 | 江苏华升面粉有限公司 | A kind of shiver system suitable for flour mill |
DE102019214864B3 (en) * | 2019-09-27 | 2020-06-18 | Thyssenkrupp Ag | Method and device for controlling and regulating a screening device and use |
CN111017493A (en) * | 2019-12-06 | 2020-04-17 | 天津伍嘉联创科技发展股份有限公司 | Vibration type poor insertion correcting mechanism |
CN111001565A (en) * | 2019-12-09 | 2020-04-14 | 苏州嘉诺环境工程有限公司 | Bouncing screen and screening control method thereof |
EP3875173A1 (en) * | 2020-03-04 | 2021-09-08 | Bühler AG | Feed or foodstuff mill |
CN112326167A (en) * | 2020-10-22 | 2021-02-05 | 中国地质科学院水文地质环境地质研究所 | Screening dynamics real-time detection analytic system of screening machine |
BE1029525B1 (en) * | 2021-06-24 | 2023-01-30 | Thyssenkrupp Ag | Raising and lowering a screening device with a grouped imbalance exciter unit |
CN114573164B (en) * | 2022-03-02 | 2023-05-09 | 广东凯链环保科技有限公司 | Waste water catalytic reaction device for treating small organic molecules |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3358815A (en) * | 1967-01-09 | 1967-12-19 | Gen Kinematics Corp | Vibratory apparatus |
DE1783063A1 (en) * | 1968-09-26 | 1971-01-28 | Haver & Boecker | Sieving machine |
US4196637A (en) * | 1975-06-16 | 1980-04-08 | Babbitless | Vibratory device with controlled actuation |
GB2080329B (en) * | 1980-07-15 | 1984-05-10 | Coal Industry Patents Ltd | Control systems for material treatment plant |
FR2550471B1 (en) * | 1983-08-08 | 1987-06-19 | Strasbourg Ste Indle Forges | VIBRATOR FOR ADJUSTING THE PHASE IN A VIBRATING APPARATUS |
CN2122170U (en) * | 1990-11-07 | 1992-11-18 | 徐州工程机械制造厂 | Vibrated roller |
CN2163010Y (en) * | 1993-08-18 | 1994-04-27 | 郝进军 | Multi-deck vibrating screening machine |
DE19539150A1 (en) * | 1995-10-20 | 1996-03-14 | Willy Laukemann | Vibration drive for oscillators allowing variable oscillations during operation |
US6080274A (en) * | 1997-05-06 | 2000-06-27 | Valmet Corporation | Method for controlling a multi-phase screening apparatus |
DE20008762U1 (en) * | 2000-05-16 | 2000-07-13 | Rheinische Werkzeug & Maschf | Screening machine with unbalance motors |
-
2004
- 2004-03-26 DE DE502004006001T patent/DE502004006001D1/en not_active Expired - Lifetime
- 2004-03-26 WO PCT/CH2004/000186 patent/WO2005092522A1/en active IP Right Grant
- 2004-03-26 EP EP04723490A patent/EP1740319B1/en not_active Expired - Lifetime
- 2004-03-26 CN CNB2004800425788A patent/CN100534635C/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2005092522A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE502004006001D1 (en) | 2008-03-06 |
WO2005092522A1 (en) | 2005-10-06 |
EP1740319B1 (en) | 2008-01-16 |
CN100534635C (en) | 2009-09-02 |
CN1925929A (en) | 2007-03-07 |
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