EP2152965A1 - Verfahren und vorrichtung zur steuerung und/oder regelung der antriebe einer walzenanordnung - Google Patents
Verfahren und vorrichtung zur steuerung und/oder regelung der antriebe einer walzenanordnungInfo
- Publication number
- EP2152965A1 EP2152965A1 EP08735943A EP08735943A EP2152965A1 EP 2152965 A1 EP2152965 A1 EP 2152965A1 EP 08735943 A EP08735943 A EP 08735943A EP 08735943 A EP08735943 A EP 08735943A EP 2152965 A1 EP2152965 A1 EP 2152965A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roller
- diameter
- operating conditions
- roll
- rollers
- 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
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G9/00—Other accessories for paper-making machines
- D21G9/0009—Paper-making control systems
- D21G9/0045—Paper-making control systems controlling the calendering or finishing
-
- 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
-
- 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
- D21G1/004—Regulating the pressure
Definitions
- the invention relates to a method for controlling and / or regulating the drives of a roller arrangement with at least two nip forming rollers for producing and / or finishing a material web, in particular paper or board web, in which the peripheral speeds of the two rollers in dependence of defined Roll diameters are determined. It further relates to a device of the type entered in the preamble of claim 20.
- the drives of paper machine coating units have been using a fixed diameter for calculating the peripheral speed before and during the closing of the units.
- This diameter is either physically measured directly or adjusted by manual analysis of the closing behavior.
- the diameter may change due to external influences such as wear or thermal expansion.
- it may happen that a roller refinished, the diameter of which is not corrected in the system.
- rollers may rattle as long as they are dry. If the roller speed does not correspond to the paper speed, there will be a torque and paper pull.
- the invention has for its object to provide an improved method and an improved device of the type mentioned, with which the aforementioned problems are eliminated.
- this object is achieved according to the invention in that the defined diameters used for determining the circumferential speeds of the rollers are at least partially adapted online to the respective current operating conditions.
- the ratio of the defined diameters of the two rolls and then the defined diameters of the rolls are adapted to the respective current operating conditions.
- the measurement of the roller speeds carried out with the roller arrangement closed can also take place during production in the case of the material web guided through the nip.
- a first roller can be defined as master and the second roller as slave.
- the drives or the roller assembly are closed at controlled and / or controlled speed of the roller drives to adapt the diameter ratio to the current operating conditions, the slave drive switched to loadsharing or torque control, the rotational speeds of the rollers measured and off the measured values obtained are determined by the current diameter ratio.
- the defined diameter of the master roll is adapted during production to the current operating conditions.
- the defined diameter of the master roll over a measured diameter and a correction factor are advantageously determined and adapted the correction factor during production to the respective current operating conditions.
- the path and / or drive fluctuations occurring during closing of the roller arrangement are preferably measured, and the correction factor is adapted to the respective current operating conditions on the basis of the result of this measurement.
- the correction factor is advantageously taken into account.
- the adjusted diameter of the slaved roll is then determined via the adapted diameter of the master roll and the adapted diameter ratio.
- the roller arrangement may in particular comprise a top roller and a bottom roller.
- the upper roll can be defined as a master roll and the lower roll as a slaved roll.
- a reverse definition is also possible.
- the adjusted defined roll diameters are preferably fed to a speed control for the rolls comprising at least one feedback loop.
- the roller arrangement can be assigned for example to a coating unit, a winding device or a calender.
- the device according to the invention is accordingly characterized in that it comprises means for at least partially adapting the defined diameters used for determining the circumferential speeds of the roller to the respective current operating conditions.
- the two steps can be carried out, for example, as follows:
- the adaptation of the relative diameters of, for example, an upper and a lower roller takes place by measuring the speeds in the closed state of the respective unit or nip. Depending on the application, this measurement can take place either in a defined sequence without material web, for example paper or board web, or during production. It is important that only the diameter ratio is adjusted.
- Vuw Deffuw ' ⁇ ' nuw
- sequence of the sequence is for example as follows:
- the diameter of the master roll can be adapted or adapted to match the speed of the material web or paper web and the roll surface speeds to each other.
- Vp paper speed
- a correction factor k O wp can advantageously be used to correct the upper roll with respect to the material web or paper web. For paper speed then the following relationship applies:
- Vp kowpDow ft riow-
- the algorithm calculates a correction of the correction factor for the diameter, for example, according to the following relationship:
- kowp (new) kowp (actual) + f ( ⁇ T P (max), J ⁇ T P " dt, paper type, basis weight, humidity)
- the correction advantageously depends both on the maximum deviation and on the integral deviation during the closing process.
- the factors used for the correction can either be adapted manually or defined again by a learning algorithm.
- the risk of paper breaks during the closing of, for example, coating units or the like can be minimized, which entails a corresponding increase in production and a corresponding minimization of paper broke generation.
- a permanent calculation of the current effective diameter is possible, which may be required for maintenance.
- the roller arrangement can be associated, for example, with a coating device.
- a coating device can be arranged, for example, between different drying groups.
- a device for a corresponding tension measurement can be provided in the web running direction in front of the coating unit.
- the invention can also be applied, for example, to spool rolls of a winding device, which are axially driven by a motor or gear. These can have different diameters due to wear or inaccurate production, which leads to problems at this position when transferring to a new drum (reel turn-up). For these, the same algorithm can be used per drum roll, although an identification of the roles by the system is needed. This can either be done automatically or via a manual input of the reels. Moreover, the invention is in u.a. Also applicable calendering.
- Figure 1 is a schematic representation of one between two
- FIG. 1 is a diagram of a typical closing of the
- Figure 3 is a schematic representation of a winding device of a
- FIG. 4 shows a diagram from which an exemplary reel change results.
- FIG. 1 shows a schematic representation of a between two dryer groups 10, 12 of a paper machine 14 arranged coating unit 16 with associated device for controlling and / or regulating the associated roller assembly 20th
- the roller arrangement 20 assigned in the present case, for example, to a coating unit 16 comprises at least two rollers forming a nip 22 between them, here for example a top roller 24 and a bottom roller 26.
- the material web to be produced or treated is, in the present case, a fibrous web, in particular a paper or board web.
- the peripheral speeds of the two rollers 24, 26 are determined as a function of defined roll diameters.
- control and / or regulating device 18 comprises means for at least partially adapting the defined, ie effective diameter used for determining the circumferential speeds of the rollers 24, 26 to the current operating conditions.
- control and / or regulating device 18 first the ratio of the defined diameters of the two rollers 24, 26 and then the defined diameters of the rollers are adapted to the respective current operating conditions.
- a measuring device 28 is provided in order to measure the speeds, preferably rotational speeds of the rollers 24, 26 when the roller arrangement 20 or the closed nip 22 is closed.
- the control and / or regulating device 18 comprising a corresponding evaluation device, the diameter ratio is then adapted to the respective current operating conditions via such a measurement of the roller speeds.
- the measurement of the roll speeds for example, with a closed roll arrangement without paper web or, in particular, also with a closed roll arrangement, can take place during production in the case of the paper web guided through the nip.
- the upper roll 24 can be defined as master and the lower roll 26 as slave. In principle, however, a reverse definition is also conceivable.
- the control and / or regulating device 18 may in particular comprise means for closing the drives or the roller arrangement at controlled and / or regulated speed of the roller drives to adjust the diameter ratio to the respective current operating conditions, to shift the slave lift to loadsharing or torque control, to cause the measurement of the rotational speeds of the rollers by the measuring device 28 and to determine the current diameter ratio from the measured values obtained.
- the defined diameter of the master roll in this case, for example, the top roll 24, is adapted to the respective current operating conditions during production.
- the defined diameter of the master roller 24 can be determined via a measured diameter and a correction factor.
- this correction factor can be preferably adjusted during production to the current operating conditions.
- a device 30 for measuring the occurring during closing of the roller assembly 20 web and / or drive fluctuations may be provided.
- the correction factor can then be adapted to the respective current operating conditions on the basis of the result of this measurement.
- the adaptation of the correction factor preferably takes place both as a function of the maximum deviation and as a function of the integral deviation during the closing of the roller arrangement 20 or of the coating unit 16.
- the adjusted diameter of the master roll 24 and the adjusted diameter ratio can then be determined by means of the control and / or regulating device 18, the adjusted diameter of the slaving roll.
- the defined roller diameters are permanently adjusted by means of the control and / or regulating device 18 to the respective current operating conditions.
- the adapted defined roll diameters may in particular be fed to a speed control for the rolls 24, 26 comprising at least one feedback loop.
- 2 shows a diagram from which a typical closing operation of the coating unit 16 (see FIG.
- FIG. 3 shows a schematic representation of a winding device 40 of a paper machine 14 with associated device for controlling and / or regulating the associated roller arrangement 42.
- the roll arrangement 42 assigned in the present case, for example, to the winding device 40 comprises two rolls forming a nip 44 between them, here, for example, a carrying drum 46 and a winding roll 48.
- the material web to be produced or treated is, in the present case, a fibrous web, in particular a paper or board web.
- the peripheral speeds of the two rollers 46, 48 are determined as a function of defined roll diameters.
- control and / or regulating device 50 comprises means for at least partially adapting the defined, that is effective diameter used for determining the circumferential speeds of the rollers 46, 48, to the current operating conditions.
- control and / or regulating device 50 Preferably, by means of the control and / or regulating device 50, first the ratio of the defined diameters of the two rollers 46, 48 and then the defined diameter of the rollers adapted to the current operating conditions.
- a measuring device 52 is provided in order to measure the speeds, preferably rotational speeds of the rollers 24, 26 when the roller arrangement 20 or closed nip 22 is closed.
- the measuring device 52 By means of the measuring device 52, the measurement of the roll speeds, for example, with a closed roll assembly without paper web or, in particular, also with a closed roll arrangement during production in the guided through the nip paper web.
- the carrier drum 46 can be defined as a master and the winding roller 48 as a slave. In principle, however, a reverse definition is also conceivable.
- the control and / or regulating device 50 may in particular comprise means for closing the drives or the roller arrangement at controlled and / or controlled speed of the roller drives for adjusting the diameter ratio to the respective current operating conditions, to switch the slave drive to loadsharing or torque control, to cause the measurement of the rotational speeds of the rollers by the measuring device 52 and to determine the current diameter ratio from the measured values obtained.
- the defined diameter of the master roll in this case, for example, the carrier drum 46, is adapted to the respective current operating conditions during production.
- the defined diameter of the master roller 46 can be determined via a measured diameter and a correction factor.
- this correction factor can be preferably adjusted during production to the current operating conditions.
- a device 54 for measuring the occurring during closing of the roller assembly 42 web and / or drive fluctuations may be provided.
- the correction factor can then be adapted to the respective current operating conditions on the basis of the result of this measurement.
- the adjustment of the correction factor preferably takes place both as a function of the maximum deviation and as a function of the integral deviation during the closing of the roller arrangement 42 or the winding device 40.
- the adapted diameter of the slave roller can then be determined by means of the control and / or regulating device 50.
- the defined roll diameters are preferably permanently adapted to the respective current operating conditions by means of the control and / or regulating device 50.
- FIG. 4 shows a diagram from which an exemplary spool change of the winding device 40 shown in FIG. 3 results in an embodiment of the method according to the invention.
- the five features are: the position of the primary arm, the speed of the empty drum, the torque of the empty drum, the speed of the carrier drum and the web tension (target web tension / actual web tension).
Landscapes
- Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
- Paper (AREA)
- Replacement Of Web Rolls (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200710022239 DE102007022239A1 (de) | 2007-05-09 | 2007-05-09 | Verfahren und Vorrichtung zur Steuerung und/oder Regelung der Antriebe einer Walzenanordnung |
PCT/EP2008/054215 WO2008138691A1 (de) | 2007-05-09 | 2008-04-08 | Verfahren und vorrichtung zur steuerung und/oder regelung der antriebe einer walzenanordnung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2152965A1 true EP2152965A1 (de) | 2010-02-17 |
EP2152965B1 EP2152965B1 (de) | 2012-09-26 |
Family
ID=39642884
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08735943A Not-in-force EP2152965B1 (de) | 2007-05-09 | 2008-04-08 | Verfahren zur steuerung und/oder regelung der antriebe einer walzenanordnung |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2152965B1 (de) |
CN (1) | CN101688369B (de) |
DE (1) | DE102007022239A1 (de) |
WO (1) | WO2008138691A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010041615A1 (de) * | 2010-09-29 | 2012-03-29 | Voith Patent Gmbh | Verfahren zum Betreiben eines Kalanders |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4343173A1 (de) * | 1993-12-17 | 1995-06-22 | Kleinewefers Gmbh | Kalander und nachgeschaltete Wickelvorrichtung |
DE102005013628A1 (de) * | 2005-03-24 | 2006-09-28 | Voith Paper Patent Gmbh | Antriebssteuerung |
US7524400B2 (en) * | 2006-06-13 | 2009-04-28 | The Procter & Gamble Company | Process for controlling torque in a calendering system |
WO2008028516A1 (en) * | 2006-09-05 | 2008-03-13 | Metso Paper, Inc. | Method and device for nip condition measurement |
-
2007
- 2007-05-09 DE DE200710022239 patent/DE102007022239A1/de not_active Withdrawn
-
2008
- 2008-04-08 EP EP08735943A patent/EP2152965B1/de not_active Not-in-force
- 2008-04-08 CN CN200880024198.XA patent/CN101688369B/zh not_active Expired - Fee Related
- 2008-04-08 WO PCT/EP2008/054215 patent/WO2008138691A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2008138691A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP2152965B1 (de) | 2012-09-26 |
CN101688369A (zh) | 2010-03-31 |
WO2008138691A1 (de) | 2008-11-20 |
DE102007022239A1 (de) | 2008-11-27 |
CN101688369B (zh) | 2012-09-05 |
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