EP0949378B1 - Machine à rouleaux et son procédé de fonctionnement - Google Patents

Machine à rouleaux et son procédé de fonctionnement Download PDF

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Publication number
EP0949378B1
EP0949378B1 EP99106505A EP99106505A EP0949378B1 EP 0949378 B1 EP0949378 B1 EP 0949378B1 EP 99106505 A EP99106505 A EP 99106505A EP 99106505 A EP99106505 A EP 99106505A EP 0949378 B1 EP0949378 B1 EP 0949378B1
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EP
European Patent Office
Prior art keywords
rollers
rolls
drive torque
rolling machine
torque distribution
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.)
Expired - Lifetime
Application number
EP99106505A
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German (de)
English (en)
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EP0949378A1 (fr
Inventor
Franz Kayser
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.)
Voith Patent GmbH
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Voith Paper Patent GmbH
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Publication date
Application filed by Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP0949378A1 publication Critical patent/EP0949378A1/fr
Application granted granted Critical
Publication of EP0949378B1 publication Critical patent/EP0949378B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/002—Opening or closing mechanisms; Regulating the pressure
    • D21G1/0026—Arrangements for maintaining uniform nip conditions
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/0006—Driving arrangements

Definitions

  • the invention relates to a roller machine with several Rollers arranged in a stack and several Forming nips for treating a material web, wherein at least two rollers are driven. Further The invention relates to a method for operating a Rolling machine with several rolls in one Stacks are arranged and form several nips, wherein at least two rollers are driven.
  • roller machine Such a roller machine is known from DE 295 18 424 U1 known.
  • the calender the roller drives are used to the individual rollers before the nips are closed on the speed of the continuous path bring to a demolition of the material web, here one Avoid paper web when closing the nips.
  • the roller machine of the present application can both trained as a calender and as a smoothing unit his.
  • Your preferred application is treatment a paper web.
  • the paper web is in the nips exposed to some pressure to bumps level in the surface of the paper web, to compress the paper web and often also to Surface of the paper web with a desired smoothness and to provide a desired gloss.
  • a Cause could be that there are initial glitches, e.g. Thickness fluctuations in the material web that occur in a Paper web by a periodically fluctuating Headbox are produced, the rollers or their jackets excite vibrations at the natural frequency and thus marks in the surface of at least one roller impress and gradually lead there to the fact that the roller becomes polygonal. This leads to a corresponding one Reaction on the material web, so that the Polygon effect gets bigger with time. From one The horizontal stripes then become visible at a certain limit.
  • a polygonal roller also has a raised one Vibration problem occur, which is characterized by the reproduces entire roller machine and also in others Nips can lead to malfunctions.
  • Vibrations are, for example, in M. Hermanski "Barring formation on the smoothing calender of a paper machine", The paper, issue 9, 1995, pages 581-590, examined.
  • the use of more wear-resistant Surfaces of the roller coverings of the soft rollers proposed. Y.N. Chen and G.
  • US-A-4 471 690 shows a supercalender with a horizontal one lying roll stack, in which the middle Roller is firm and accordingly either the nips left or right of this roller can be closed.
  • a drive control is provided in which the middle roller serves as a guide roller on the Peripheral speeds the peripheral speeds the other rollers are adjusted.
  • GB-A-1 156 937 shows a calender with several rolls, which are arranged in a roll stack. The lower one The roller is driven. The remaining rollers are carried away by friction. At least one of the intermediate rolls is mounted so that it comes from the level of Roll stack can be moved out. With that a barrier phenomenon can be avoided.
  • the invention has for its object barring phenomena to diminish.
  • the drive control advantageously has a random generator on. With the help of the random generator you can the distribution of the drive torques vary without a periodicity occurs again with this variation, which in turn indirectly lead to barring formation could.
  • the random number generator can either immediately act on the drive torque distribution, or it can evaluate functions with which the drive torque distribution is varied. It is also possible, that it determines period lengths in which given Drive torque distributions are driven.
  • the drive control advantageously has one Limiter of the drive torque change rate keeps below a predetermined value. Jumps in the drive torque of a roller could otherwise lead to the tear of the web of material, which also is undesirable.
  • the drive control with a sensor device is advantageous connected that at least one property the material web and / or at least one operating parameter of the machine and the drive torque distribution depending on at least an output signal of the sensor device changes.
  • the Barring is formed when appropriate sensors are used already recognizable in their development. For example the barrier strips can be used with suitable sensors before they are visible to the eye. A another possibility is that you can see the vibrations of the Roll machine determines which increase when the barring increases. In all of these cases, the drive control intervene and the distribution of the drive torque change to the driven rollers, before the barring is actually noticeable so far is that the material web generated is no longer usable is.
  • the drive control preferably has a timer on. You can set certain blocks of time in where the drive torque distribution is constant. To Such a time block can change the drive torque distribution.
  • the length of the time block can be determined, for example, by the random number generator be determined.
  • the drive control can have a memory in which at least one Change function is saved.
  • the drive control one Function generator for generating a drive torque change function having. Especially related with a random generator, the function generator then generate functions that change the drive torque distribution so causes states not at all or only at relatively large intervals can repeat.
  • the rollers preferably have at least two different ones Diameter on. You avoid one Repeat, on which a slightly thicker flaw appears a roller, for example caused by a Pollution, always in the same place the Counter roller presses. A rocking or swinging up this phenomenon is avoided.
  • a speed control device is advantageous provided for the material web.
  • Another Size which has a relatively large impact on operational behavior has is the speed of through the roll machine running material web. The speed has a direct impact on the speed of the rollers and thus on the vibrations caused by the rotation of the rollers are caused. Also by changing these sizes, the "disrupt" stationary operation.
  • At least one roller with its axis outside one Plane is arranged by the axes of two neighboring Rolling is defined. This way you can reach a phase shift between two nips that then has good effectiveness when the web of material with periodic fluctuations in density or thickness from the production machine, for example the paper machine, comes.
  • a web guiding device is arranged in front of a nip, the Distance to the nip is changeable.
  • Such Device per se is known from DE 196 01 293 A1. Again, you can "disrupt" the operation a bit Prevent build-up of the negative deformations of the rollers.
  • the task is in a method of the aforementioned Kind solved in that the drive torque distribution the co-driven rollers is changed.
  • the drive torque distribution is preferably during of operations changed. So it’s not even necessary that the roller machine is stopped.
  • a Change in the distribution of the drive torque during the operation also has the advantage that it is relatively certain that one does not happen by accident when starting up the roller machine again receives the same or similar operating conditions as beforehand, especially with regard to vibrations.
  • the drive torque distribution is preferably predetermined Periods kept constant and then changed.
  • the time periods are so small that a barring formation is not yet certain with high certainty can watch. But otherwise they make one possible unchanged operation with constant parameters over the periods mentioned.
  • the drive torque distribution can also be changed continuously. In this case there one of the roller machine no opportunity in a stable or stationary operation to build up faults.
  • a third alternative can be provided be that the drive torque distribution is kept constant until a disturbance parameter reaches a predetermined Value exceeds, and then is changed.
  • certain occur Disturbances e.g. when a certain vibration amplitude is reached or if one does not yet occur visible barrings on the material web, the drive torque distribution be changed.
  • the rate of change is advantageous limited to a predetermined value. You avoid the occurrence of sudden or sudden Torque changes that may result in a crack can lead the material web.
  • the change in the drive torque distribution advantageously takes place randomly.
  • Fig. 1 shows a calender 1 as an example of a Rolling machine.
  • the calender 1 has eight rolls 2-9 on, of which four rollers 2, 4, 7, 9 a hard metallic Surface and four rollers 3, 5, 6, 8 an elastic Have plastic covering 13. All rollers are stored with their roller journals in bearing housings 23, 23 '.
  • the bearing housings 23 'of the middle rollers 3-8 are attached to levers 24, the pivot point 25 located on the calender frame 26.
  • Below the roll stack, which is formed by the rollers 2-9 is a Hydraulic cylinder 27 provided on the one hand for the satin finish of a paper web 21, which is shown here as an example serves for a material web, necessary forces in the closed Nip and on the other hand the Lower roller 9 can lower.
  • the levers 24 on stops 28 from, in such a way that between the rollers Form gaps from 1 to 10 mm.
  • the two middle hard rolls 4, 7 cannot in Heating steam for heating is shown in more detail become.
  • the heating steam is through peripheral holes 122 passed so that it can transfer its heat to the roller can give up.
  • a feed device 10 is only schematic and a recording device 11 is shown.
  • the dining facility 10 can, for example, by an unwinding station and the receiving device 11 by a Be winding station formed. But it is also conceivable that the feed device through part of the paper machine itself and the receiving device through further parts of the paper machine are formed.
  • a total of three rolls are driven in the calender 1, namely the top roller 2 and the two center rollers 5, 6.
  • the driven rollers 2, 5, 6 have a common one Drive control 14, which ensures that the sum of the drive power of the driven rollers 2, 5, 6 always achieved at least 100% of the performance, necessary to operate the calender 1 is. More specifically, the driven rollers produce 2, 5, 6 together enough torque to the paper web 21, like a calender with only one driven Roll, too, with the necessary speed and To lead tensile force through the calender 1.
  • the paper web is here in the nips between the individual Rollers 2-9 are subjected to pressure and elevated temperature.
  • the non-driven rollers 3, 4, 8, 9 are of the Paper web or from the moment of the driven Rolls 2, 5, 6 taken.
  • the drive torques of the driven rollers 2, 5, 6 are changed in a targeted manner from time to time. This is shown schematically with reference to FIG. 2.
  • the percentage of the individual rollers 2, 5, 6 of the total drive torque is plotted upwards. If the drives are controlled, the specified values relate to the setpoint specifications.
  • roller 2 In a time period A, for example, roller 2 is driven with 60% of the total torque, while rollers 5 and 6 each contribute 20% to the total drive torque.
  • the proportion of roller 2 is only 30%
  • the proportion of roller 5 is 40% and the proportion of roller 6 is also 30%.
  • section E the proportion of roller 5 increases to 50%.
  • the proportion of the roller 2 increases again to 40% and the proportion of the roller 6 drops to 10% of the total drive torque.
  • the drive control 14 points for each drive an actuator 15-17, for example the individual drives of the rollers 2, 5, 6 supplied electrical Performance determines, if necessary, only the Power setpoint if the individual drive is still has a regulation.
  • the control of the actuators 15-17 is done by a central unit 18. Die Central processing unit 18 in turn has a random number generator 19 and a timer 20 connected.
  • the timer 20 can be, for example, the duration of that shown in FIG. 2 Time blocks A, C and E and the transition times Set B and D.
  • the random generator 19 generates Random numbers with those based on given algorithms the proportions of the individual driven rollers 2, 5, 6 to be determined on the total drive torque.
  • the sensor 22 can determine long before the human eye if barring occurs. As soon as the sensor 22 a such a phenomenon is detected by a transducer 29, which is connected to the sensor 22, a corresponding signal to the central unit 18.
  • a vibration sensor can be used 30 attached to the frame 26 of the calender 1, which is connected to a transducer 31. If the transducer 31 determines that the amplitude the vibration of the frame a predetermined value exceeds, then he also reports this to the central unit 18 further corresponding to the actuators 15-17 changed.
  • the central unit 18 the actuators 15-17 continuously adjusted, for example depending on values that the random number generator 19 issues. In this case too but the rate of change is below a predetermined Value.
  • the central unit 18 thus forms automatically also a limiter.
  • a memory 32 can be provided in a change function, preferably even several Change functions are stored that are used to the actuators 15-17 according to a predetermined Process to be adjusted.
  • the selection of the change functions can again be done at random if controlled by the random number generator 19.
  • the Central unit 18 can also function as a generator itself act and, for example with the initial values of the random generator 19, generate functions, the time course of the change in the drive torque distribution reproduces on the rollers 2, 5, 6.
  • each parameter set contains for each roller the percentage of the total output of the calender with which the corresponding roller to be driven. If the calender consists of n drive rollers then the drive power for n-1 Select rollers more or less freely and in every parameter set pretend. The drive power for the remaining Roll must then be the difference to the desired one Total drive power of the calender result.
  • These parameter sets are stored in a table.
  • An example of such a table is shown in FIG. 4 shown.
  • the table has three columns for each roll.
  • the The first column shows the absolute power in kW.
  • the second column shows the proportion of this absolute Power on the installed power of this roller.
  • the third column shows the share of the drive power on the overall performance of the calender.
  • the random generator now generates different period lengths or sequence durations.
  • a parameter set is used. For example, the in Line 1 listed parameter set over a period of time of 8 hours and 23 minutes. The one in line 2 displayed parameter set is over 14 hours and 37 Minutes used etc.
  • the random generator generates, for example, a number x that is between 0 and 1.
  • the driven Rolls 5, 6 either adjacent or, as in the Rolls 2 and 5, separated by two other rolls.
  • the deflection of the rollers 2-8 perpendicular to Plane in which the axes of rotation of the rollers 2-9 are arranged are to counteract.
  • Fig. 3 shows a further training, in the same Parts are provided with the same reference numerals. Here further measures can be identified to prevent barring counteract.
  • the drive control 14 also acts on the feed device 10 and the pickup 11 to the speed to be able to change the paper web 21.
  • a deflection roller 33 is displaceable perpendicular to a plane 34, in the axes of rotation of the top roller 2 and the bottom roller 9 are arranged.
  • a hydraulic cylinder 35 provided that the deflection roller 33 in the direction of a Double arrow 36 moves. This way the way between the two nips, which are from the roller 3 be limited, changed. This measure is special effective against barring caused by yourself periodically changing headbox of the paper machine is caused.
  • rollers 3 and 6 offset laterally from the plane through which Axes of rotation of their two neighboring rollers 2, 4 and 5, 7 is defined. This also gives you a small one Phase shift between two nips.
  • rollers 2-9 have their own drive and the drive control 14 controls all drives.
  • the underlying one Mechanism is the same as that in Fig. 1 illustrated embodiment. Accordingly, on a more detailed explanation of the internal structure of the drive control 14 waived. Here too the sum has to be the driving torques are 100% to a corresponding to enable the calender 1 to work satisfactorily.
  • reels 2-9 can run continuously or periodically or changed depending on the event.
  • the calender roll stack is constructed that the rollers are not all the same diameter to have.
  • the two rollers 5, 6 also have different ones Diameter.
  • the roller 3 is larger than the roller 4. This measure also counteracts the formation of barring.

Landscapes

  • Paper (AREA)
  • Metal Rolling (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Treatment Of Fiber Materials (AREA)

Claims (20)

  1. Machine à rouleaux avec plusieurs rouleaux (2-9), qui sont disposés en une pile et qui forment plusieurs emprises pour le traitement d'une bande de matière (21), dans laquelle au moins deux rouleaux (2, 5, 6) sont entraínés, caractérisée en ce que les rouleaux entraínés (2, 5, 6) présentent une commande d'entraínement commune (14), qui fait varier la distribution du couple d'entraínement des rouleaux entraínés (2, 5, 6).
  2. Machine à rouleaux suivant la revendication 1, caractérisée en ce que la commande d'entraínement (14) présente un générateur aléatoire (19).
  3. Machine à rouleaux suivant la revendication 1 ou 2, caractérisée en ce que la commande d'entraínement (14) présente un limiteur, qui maintient la vitesse de variation du couple d'entraínement sous une valeur prédéterminée.
  4. Machine à rouleaux suivant l'une quelconque des revendications 1 à 3, caractérisée en ce que la commande d'entraínement est raccordée à un dispositif de détection (22, 23), qui détermine au moins une propriété de la bande de matière (21) et/ou au moins un paramètre de fonctionnement de la machine (1), et qui modifie la distribution du couple d'entraínement en fonction d'au moins un signal de sortie du dispositif de détection (22, 23).
  5. Machine à rouleaux suivant l'une quelconque des revendications 1 à 4, caractérisée en ce que la commande d'entraínement (14) présente une horloge (20).
  6. Machine à rouleaux suivant l'une quelconque des revendications 1 à 5, caractérisée en ce que la commande d'entraínement présente une mémoire (32), dans laquelle est mémorisée au moins une fonction de variation.
  7. Machine à rouleaux suivant l'une quelconque des revendications 1 à 6, caractérisée en ce que la commande d'entraínement présente un générateur de fonctions destiné à produire une fonction de variation du couple d'entraínement.
  8. Machine à rouleaux suivant l'une quelconque des revendications 1 à 7, caractérisée en ce que deux rouleaux (2, 5; 5, 6) sont entraínés, qui sont disposés à une distance de 2 x n rouleaux, avec n = 0, 1, 2, ...
  9. Machine à rouleaux suivant l'une quelconque des revendications 1 à 8, caractérisée en ce que les rouleaux (2-9) présentent au moins deux diamètres différents.
  10. Machine à rouleaux suivant l'une quelconque des revendications 1 à 9, caractérisée en ce qu'il est prévu un dispositif de commande de la vitesse (14, 10, 11) pour la bande de matière (21).
  11. Machine à rouleaux suivant l'une quelconque des revendications 1 à 10, caractérisée en ce qu'au moins un rouleau (3, 6) est disposé avec son axe hors d'un plan qui est défini par les axes de deux rouleaux voisins (2, 4; 5, 7).
  12. Machine à rouleaux suivant l'une quelconque des revendications 1 à 11, caractérisée en ce qu'un dispositif de guidage de défilement de la bande (33) est disposé devant une emprise, à une distance variable par rapport à l'emprise.
  13. Procédé pour la conduite d'une machine à rouleaux (1) avec plusieurs rouleaux (2-9), qui sont disposés en une pile et qui forment plusieurs emprises, dans laquelle au moins deux rouleaux (2, 5, 6) sont entraínés, caractérisé en ce que l'on fait varier la distribution du couple d'entraínement des rouleaux entraínés ensemble (2, 5, 6).
  14. Procédé suivant la revendication 13, caractérisé en ce que l'on fait varier la distribution du couple d'entraínement pendant le fonctionnement.
  15. Procédé suivant la revendication 13 ou 14, caractérisé en ce que l'on maintient la distribution du couple d'entraínement constante pendant des périodes de temps prédéterminées et qu'on la fait varier ensuite.
  16. Procédé suivant la revendication 13 ou 14, caractérisé en ce que l'on fait varier la distribution du couple d'entraínement de façon continue.
  17. Procédé suivant la revendication 13 ou 14, caractérisé en ce que l'on maintient la distribution du couple d'entraínement constante jusqu'à ce qu'un paramètre de perturbation dépasse une valeur prédéterminée, et qu'on la fait alors varier.
  18. Procédé suivant l'une quelconque des revendications 13 à 17, caractérisé en ce que la vitesse de variation est limitée à une valeur prédéterminée.
  19. Procédé suivant l'une quelconque des revendications 13 à 18, caractérisé en ce que l'on effectue la variation de la distribution du couple d'entraínement suivant le principe du hasard.
  20. Procédé suivant l'une quelconque des revendications 13 à 19, caractérisé en ce que l'on fait varier également la vitesse de la bande de matière.
EP99106505A 1998-04-06 1999-03-30 Machine à rouleaux et son procédé de fonctionnement Expired - Lifetime EP0949378B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19815339A DE19815339A1 (de) 1998-04-06 1998-04-06 Walzenmaschine und Verfahren zu ihrem Betrieb
DE19815339 1998-04-06

Publications (2)

Publication Number Publication Date
EP0949378A1 EP0949378A1 (fr) 1999-10-13
EP0949378B1 true EP0949378B1 (fr) 2002-12-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP99106505A Expired - Lifetime EP0949378B1 (fr) 1998-04-06 1999-03-30 Machine à rouleaux et son procédé de fonctionnement

Country Status (5)

Country Link
US (1) US6199476B1 (fr)
EP (1) EP0949378B1 (fr)
AT (1) ATE229593T1 (fr)
CA (1) CA2267965C (fr)
DE (2) DE19815339A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2128337A1 (fr) 2008-05-31 2009-12-02 Voith Patent GmbH Procédé de fonctionnement d'une calandre et calandre

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DE10133888C1 (de) * 2001-07-12 2002-11-28 Voith Paper Patent Gmbh Verfahren zum Betreiben eines Kalanders und Kalander
DE10133889C1 (de) 2001-07-12 2002-11-28 Voith Paper Patent Gmbh Verfahren zum Betreiben eines Kalanders
DE10133890C1 (de) * 2001-07-12 2002-12-05 Voith Paper Patent Gmbh Verfahren zum Betreiben eines Kalanders
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US7325489B2 (en) * 2006-06-13 2008-02-05 The Procter & Gamble Company Process for controlling torque in a calendering system
US7524400B2 (en) * 2006-06-13 2009-04-28 The Procter & Gamble Company Process for controlling torque in a calendering system
DE102006031022A1 (de) * 2006-07-05 2008-01-10 Voith Patent Gmbh Schwingungsdämpfung
DE102007022241A1 (de) * 2007-05-09 2008-11-27 Voith Patent Gmbh Verfahren und Vorrichtung zur Kompensation von periodischen Momentschwankungen
FI121752B (fi) * 2009-07-07 2011-03-31 Metso Paper Inc Laitteisto ja menetelmä kuiturainan käsittelynipin ajettavuuden hallitsemiseksi
DE202012001302U1 (de) 2012-02-10 2012-03-09 Metso Paper, Inc. Maschine zur Herstellung und/oder Behandlung einer Faserbahn
US10363590B2 (en) 2015-03-19 2019-07-30 Machine Concepts, Inc. Shape correction leveler drive systems
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2128337A1 (fr) 2008-05-31 2009-12-02 Voith Patent GmbH Procédé de fonctionnement d'une calandre et calandre
DE102008026344A1 (de) 2008-05-31 2009-12-03 Voith Patent Gmbh Verfahren zum Betreiben eines Kalanders und Kalander

Also Published As

Publication number Publication date
DE59903709D1 (de) 2003-01-23
ATE229593T1 (de) 2002-12-15
EP0949378A1 (fr) 1999-10-13
CA2267965A1 (fr) 1999-10-06
CA2267965C (fr) 2004-02-03
DE19815339A1 (de) 1999-10-14
US6199476B1 (en) 2001-03-13

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