EP1087057B1 - Calandre - Google Patents

Calandre Download PDF

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Publication number
EP1087057B1
EP1087057B1 EP00119970A EP00119970A EP1087057B1 EP 1087057 B1 EP1087057 B1 EP 1087057B1 EP 00119970 A EP00119970 A EP 00119970A EP 00119970 A EP00119970 A EP 00119970A EP 1087057 B1 EP1087057 B1 EP 1087057B1
Authority
EP
European Patent Office
Prior art keywords
calender according
roller
roll
calender
overload safeguard
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
EP00119970A
Other languages
German (de)
English (en)
Other versions
EP1087057A2 (fr
EP1087057A3 (fr
Inventor
Rolf Dr. Van Haag
Ingo Dipl. Ing Engelhardt
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
Original Assignee
Voith Paper Patent 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 Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP1087057A2 publication Critical patent/EP1087057A2/fr
Publication of EP1087057A3 publication Critical patent/EP1087057A3/fr
Application granted granted Critical
Publication of EP1087057B1 publication Critical patent/EP1087057B1/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
    • D21G1/02—Rolls; Their bearings
    • D21G1/0226—Bearings
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus

Definitions

  • the invention relates to a calender with a frame, an upper roller, which acts as a deflection adjustment roller is formed, a lower roller, the is designed as a deflection adjustment roller, and one Intermediate roller arrangement with an intermediate roller, which is defined in the chair.
  • Such a calender is from DE-A-19 633 671 and the post-published German patent application 198 32 067 known. at These calenders are provided with a roll stack the upper roller and the lower roller as deflection adjustment rollers are trained. With the rollers the intermediate roller arrangement lacks this possibility. However, one of the intermediate rollers is in the frame fixed, so that you have the compressive stress ratios in the nips above the specified intermediate roller and largely below the specified intermediate roller can set freely.
  • roller shells with a fixed position which are also known as “NIPCO K” and radially movable roller shells, which are also called “NIPCO F” are known.
  • NIPCO K radially movable roller shells
  • NIPCO F radially movable roller shells
  • the invention has for its object the possibilities of action to improve on a web of material.
  • This task is performed on a calender of the type mentioned at the beginning Kind solved in that the intermediate roller with an overload protection is provided.
  • the intermediate rolls the intermediate roller arrangement and thus also the fixed intermediate roller are generally only for dimensioned a symmetrical load from two sides. Only in one compared to the total load restricted area is a center roll and front all the specified intermediate roller for a bending load designed. This bending stress occurs above all if only one deflection adjustment roller is used for Compressive stress generation used in the assigned nips becomes. But also with very different ones Press the upper and lower deflection adjustment rollers there is a risk that the intermediate roller is overloaded becomes. The intermediate roller can be overloaded lead to destruction. Because such an error usually visible relatively quickly is basically manageable. However, are critical Damage that is not immediately visible.
  • the overload protection device preferably has a force-dependent triggering device on the if a predetermined threshold value is exceeded, a Reduction of the force acting on the intermediate roller causes.
  • the overload protection shows the overload not only attacks, but actively intervenes to overload to prevent the specified intermediate roller. If such a stressful situation develops, then the force on the intermediate roller is applied in time lowered.
  • the intermediate roller in levers is stored and the overload protection between at least a lever and the chair is arranged.
  • the Storage of the intermediate rolls in levers is by many Calenders known as "lever calenders". If you put the overload protection between the lever and arranging the chair, then you can take advantage of one Use leverage. In this case, you can Significantly improve the sensitivity of the overload protection.
  • the overload protection is preferably on both axial Arranged ends of the intermediate roller.
  • the overload protection determines the forces on the two axial Ends of the intermediate roller. So it can not only be an overload as the sum of all those acting on the roller Determine forces, but also an asymmetrical one Force distribution that leads to an imbalance or misalignment could lead. This also makes adjustment easier of the calender or its hydraulics or the Hydraulics in the deflection adjustment roller during commissioning or when hiring.
  • the overload protection device preferably has a force display device on.
  • the overload protection device preferably has a hydraulic one Support on that from opposite sides essentially parallel to the direction of the press on the Intermediate roller or an associated holder acts, with a comparison device for the hydraulic Pressures on both sides is provided.
  • This type of support can be used to measure a differential pressure, so to speak to determine the exact force with the roller or its holder, for example the lever that is charged.
  • In addition to the pure Overload protection can be done with this training the actual force at each operating point according to size and direction on each side of the fixed Measure the roller by measurement. This makes it easier Setting the correct load balance in the upper and lower part of the roll stack. A power imbalance or are skewed, as above mentioned, immediately recognizable.
  • the comparison device has a differential pressure valve that a Quick relief function at least for a deflection adjustment roller controls. If you have a differential pressure valve used is not a conversion of measured values, i.e. hydraulic pressure into an electrical control signal, via a controller, for example a PLC.
  • the hydraulic support is preferably hydrostatic educated. With this one achieves as another The advantage of a large damping of the roller vibrations.
  • the hydraulic support can be two have hydraulic cylinders biased against each other.
  • the pressure must be applied when the roller is subjected to force rise in one cylinder and in the opposite Cylinder fall off. This can be achieved automatically by looking at the volume of oil in the cylinders imprisons. Because an absolutely leak-free seal the cylinder is difficult to reach, you can Provide pressure accumulator for this mode of operation. When reached a defined maximum pressure in a cylinder becomes the rapid relief of the intermediate roller initiated by the pressures in the corresponding Deflection adjustment roller can be lowered.
  • the overload protection is a spring device and has a path length-dependent sensor.
  • the connection between force, spring and displacement is a general one physical law. So you can go through the Monitoring compression or extension of one Close the spring on the force on the intermediate roller acts. This spring monitoring can be relative inexpensive design.
  • the spring device with disc springs connected in parallel is formed. These have a high rigidity and therefore cause only a slight shift even with higher forces, so the geometry of the roll stack is not is significantly influenced.
  • the Disc springs also have good vibration damping behavior, that positively affects the calender's caster effect.
  • the spring device can also by a roller axis can be formed.
  • This configuration is advantageous because no additional components are required become.
  • roller axis there is no need to physically existing component in the sense of a continuous Rod to be understood.
  • Many rollers, for example Heating rollers only have on the front Roll neck.
  • the deflection of a is under nominal load such pin in the area between the roller body and bearings for example at 0.3 to 0.5 mm. Such one Deflection can certainly be measured even if such a roller not in levers, but directly in the chair is set.
  • the sensor is preferably designed as a limit switch. If due to one acting on the intermediate roller Force against the force of the springs or against the Force of the roller axis acting as a spring or the pin a certain deflection is reached, then the or the limit switch operated and the pressure in the deflection adjustment rollers or the outer cylinders, who can muster the appropriate forces be reduced.
  • the sensor can be used as a non-contact Proximity sensor can be formed. In this case one is already approaching the intermediate roll to one critical situation and thus the building of critical Monitor forces. In many cases, they are non-contact working proximity sensors also less sensitive to what is advantageous for operation in the calender.
  • the overload protection can be used in another Alternatively, it can also be designed as a shear pin. This is a very simple design. If that on the. specified intermediate roller acting force a certain Exceeds the value, the bolt shears off and the lever moves to an end position. There he can Trigger limit switch, which relieves the pressure on the Hydraulic roller triggers. The only requirement for this is that the breaking load of the bolt is lower, usually significantly lower must be that of the roller. This solution is relatively inexpensive. It is particularly recommended if the Calender is already set correctly because then No more or no overload situations can be expected more often.
  • Fig. 1 shows a calender 1 with a frame 2, in which is arranged a roll stack 3.
  • the roll stack 3 is formed by five rollers, the top of which Roller 4 and the bottom roller 5 as deflection adjustment rollers are trained. This is due to hydrostatic Support elements 6, 7 indicated schematically.
  • the Rollers 4, 5 are designed as so-called jacketed rollers, where the roller shells versus one Fixed carrier not shown in Are movable in the direction of the press plane.
  • the press level is a plane in which the axes of all rolls of the Roll stack 3 are arranged.
  • the Intermediate rollers 8-10 are mounted on levers 11-13 which are in turn suspended in the chair 2.
  • the lever 11 of the top intermediate roller 8 in the frame 2 determines what is shown by a schematically Fastening means 14 should be indicated.
  • the other two levers 12, 13 are about pivot points 15, 16 pivotable.
  • There is also a lever 11 Pivot point 17 is provided, as explained below will be.
  • lever 11 is fixed in the frame 2 you can in a nip 18 between the top one Roller 4 and the intermediate roller 8 a compressive stress independently from the compressive stresses in the other nips Set 19-21. This results in expanded options for influencing in treating one no closer illustrated web of material. Of course you can also set other levers in the chair, for example lever 12 or lever 13.
  • the deflection adjustment rollers 4, 5 are hydraulic actuated piston-cylinder units 22, 23 'arranged. These piston-cylinder units 22, 23 can used to be in addition to a 'movement Jackets of the deflection adjustment rollers 4, 5 another To cause movement of the complete roller 4, 5 to to support a quick disconnect. Such piston-cylinder units 22, 23 can also be used if the deflection adjustment rollers 4, 5 are not designed as a jacket stroke, but fixed position Have roller jackets.
  • the intermediate roller 8 is like the other two intermediate rollers 9, 10 too, only for one essentially symmetrical load designed from two sides. With the two intermediate rolls 9, 10, this does not lead to any Problem because the rollers 9, 10 under load move from below with their levers 12, 13 upwards can. This possibility is lacking in the Chair 2 fixed intermediate roller 8. Accordingly there is a risk that the specified intermediate roller 8 damaged if the one-sided pressure is too high is, be it the storage of the intermediate roller 8 or the Intermediate roller 8 itself. Such a situation can particularly occur when the upper deflection adjustment roller 4 works with other forces than the lower deflection adjustment roller 5. Particularly critical the situation can become when the top nip 18 is kept pressure-free and the treatment of a material web only in the other nips 19-21 or vice versa.
  • Fig. 2 shows an embodiment in which the lever 11th on both sides, i.e. from above and from below, by hydrostatic Oil cushion 24, 25 is supported.
  • This is the lever 11 is provided with a crossbar 26, the adjacent support shoes 27, 28 are arranged.
  • everyone Support shoe forms a pressure pocket for the oil cushion 24, 25.
  • the pressure pockets are via a pressure pump 29 and throttles 30, 31 supplied with hydraulic oil under pressure.
  • the support shoes 27, 28 are based on the Chair 2 off.
  • the pressure of the pressure pads 24, 25, i.e. the pressure in the pressure pockets is measured by manometer 33, 34 (pressures P1, P2) determined. Through a differential pressure measurement the exact force can be determined with which the lever 11 is loaded.
  • Fig. 3 shows an alternative embodiment, which also works hydraulically.
  • the lever is 11 from above and from below with hydraulic cylinders 37, 38 held.
  • the hydraulic cylinders 37, 38 are with a biased constant pressure.
  • the pressure in a cylinder 37, 38 must rise and fall off in the other hydraulic cylinder 38, 37. This can be achieved automatically by the oil volume in the cylinder 37, 38 is locked. Since this is an absolutely leak-free seal the hydraulic cylinder 37, 38 presupposes this Operating mode by pressure accumulator 39, 40 disarmed become.
  • pressure accumulator 39, 40 disarmed become.
  • FIG. 4 shows an embodiment of an overload protection, that does not require any complex conversions.
  • a shear pin 41 is arranged between the lever 11 and the frame 2. This holds the lever 11 in a fixed position to the chair 2. Exceeds one on the lever 11 force has a certain value, so the Bolt 41 off and the lever 11 moves into an end position. There he can a limit switch, not shown trigger the rapid unloading of the roller hydraulics triggers.
  • the breaking load of the shear pin 41 must be clear be designed less than that of the roller 8.
  • a disadvantage this variant is that in the commissioning phase, in which the calender 1 is not yet completely correct is set, many breaks of the shear pin 41 can occur. For this reason, you can in the commissioning phase take further measures to address the limit the roller 8 acting forces and the shear pin 41 only use when commissioning is completed.
  • FIG 5 shows a further alternative embodiment, in which the lever 11 with the aid of two spring packs 42, 43 is supported against stops 44, 45 which in the chair 2 are attached.
  • the lever 11 is through a one-sided roll load is slightly deflected.
  • the springs 42, 43 are dimensioned so that limit switches 46, 47 only after a certain limit has been exceeded maximum load can be reached and triggered. Since only small distances have to be covered here A high level of stiffness is an advantage here switched disc springs used. This has too which still has good vibration damping behavior Consequence, which has a positive effect on the smooth running of the calender 1 affects.
  • overload protections previously presented were in Described in connection with an intermediate roller 8, the is suspended in the frame 2 via a lever 11.
  • overload protection can also be used with rollers use that attached directly to the stool are. This will be explained with reference to FIG. 6.
  • Fig. 6 shows a roller 8 ', for example one Heating roller, even without the intermediary of levers can be attached in a frame 2 '.
  • the roller 8 ' has roller journals 48, 49 which in the frame 2 ' are stored. Through the roll neck 48, 49, the Roller 8 ', for example, is supplied with heat transfer fluid become. This is not shown in more detail. If now a resulting force on the roller 8 'on one side acts in one direction, then the roller 8 'and so that their roll neck 48, 49 bend. This is in Fig. 6 with dash-dotted lines exaggerated shown.
  • the axis 50 forms a straight line, when the roller 8 'is in equilibrium of forces.
  • Heating roller 8 ' is the deflection of the pin 48, 49 in the area between the roller body and the bearing in the frame 2 'at 0.3 to 0.5 mm under nominal load.
  • inductively working displacement transducers 51-54 are provided without contact, for example inductively working displacement transducers 51-54. These are in arranged in two directions in the plane of the roller at both axial ends of the roller 8 '. Of course even more displacement transducers can be provided even outside of the roll plane (i.e. the plane, in which the axes of all rolls of the calender 1 lie).
  • the roller 8 As shown, the roller 8 'and bend their roll neck 48, 49. You can use the roller 8 see with their pin 48, 49 as a large spring. If the deflection exceeds a predetermined level, then it can also be assumed that the force is appropriate is great. The position transducers can then be used Display "spring state” or generate a signal that triggers a quick separation of the rollers.
  • contactless Transducers which are also in the Embodiment according to FIGS. 2 to 5 can be used can have the advantage that they are not only in the Trigger moment when the corresponding maximum force is reached is, but that they make it possible already countermeasures corresponding to reaching the maximum force hold true. In addition, you can see the force curve during a treatment process, for example a satinage, continuously record to one to enable better quality control.

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  • Paper (AREA)
  • Treatment Of Fiber Materials (AREA)

Claims (15)

  1. Calandre avec une ferme, un rouleau supérieur, conçu sous forme de rouleau de réglage de la déflexion, un rouleau inférieur conçu sous forme de rouleau de réglage de la déflexion et avec une configuration de rouleaux intermédiaire avec un rouleau intermédiaire qui est fixé dans la ferme, caractérisée en ce que le rouleau intermédiaire (8, 8') est muni d'une sécurité anti-surcharge (24, 25 ; 37, 38 ; 41 ; 42, 43 ; 51-54).
  2. Calandre selon la revendication 1, caractérisée en ce que la sécurité anti-surcharge (24, 25 ; 37, 38 ; 41 ; 42, 43 ; 51-54) est munie d'un système de déclenchement réagissant en fonction des forces et qui en cas de dépassement d'une valeur seuil prédéfinie provoque une baisse de la force exercée sur le rouleau intermédiaire (8, 8').
  3. Calandre selon l'une quelconque des revendications 1 ou 2, caractérisée en ce que le rouleau intermédiaire (8) est logé dans des leviers (11) et la sécurité anti-surcharge (24, 25 ; 37, 38 ; 41 ; 42, 43) est disposée entre au moins un levier (11) et la ferme (2) .
  4. Calandre selon l'une quelconque des revendications 1 à 3, caractérisée en ce que la sécurité anti-surcharge (24, 25 ; 37, 38 ; 41 ; 42, 43 ; 51-54) est disposée sur les deux extrémités axiales du rouleau intermédiaire (8, 8').
  5. Calandre selon la revendication 4, caractérisée en ce que la sécurité anti-surcharge (24, 25 ; 37, 38) est munie d'un système d'affichage des forces (33, 34).
  6. Calandre selon l'une quelconque des revendications 1 à 5, caractérisée en ce que la sécurité anti-surcharge (24, 25 ; 37, 38) est munie d'un support hydraulique, qui à partir de côtés opposés agit sur le rouleau intermédiaire (8) ou sur une fixation (26) reliée à ce dernier, de façon sensiblement à la parallèle de la direction de la presse, un système de comparaison des pressions hydrauliques étant prévu sur les deux côtés.
  7. Calandre selon la revendication 6, caractérisée en ce que le système de comparaison est muni d'une soupape de pression différentielle, laquelle pilote une fonction de décharge rapide au moins pour un rouleau de réglage de la déflexion (4, 5)
  8. Calandre selon l'une quelconque des revendications 6 ou 7, caractérisée en ce que le support hydraulique est de conception hydrostatique.
  9. Calandre selon l'une quelconque des revendications 6 ou 7, caractérisée en ce que le support hydraulique est muni de deux cylindres hydrauliques (37, 38), précontraints l'un par rapport à l'autre.
  10. Calandre selon l'une quelconque des revendications 1 à 5, caractérisée en ce que la sécurité anti-surcharge est munie d'un système de ressorts (42, 43) et d'un capteur (46, 47 ; 51-54) dépendant de la longueur de la course.
  11. Calandre selon la revendication 10, caractérisée en ce que le système de ressorts (42, 43) est conçu avec des ressorts Belleville montés en parallèle.
  12. Calandre selon la revendication 10, caractérisée en ce que le système de ressorts est formé par un axe de rouleau (48, 49).
  13. Calandre selon l'une quelconque des revendications 10 à 12, caractérisée en ce que le capteur est conçu sous forme d'interrupteur de fin de course (46, 47).
  14. Calandre selon l'une quelconque des revendications 10 à 12, caractérisée en ce que le capteur est conçu sous forme de capteur de proximité sans contact (51-54) .
  15. Calandre selon l'une quelconque des revendications 1 à 5, caractérisée en ce que la sécurité anti-surcharge est conçue sous forme de goujon de cisaillement (41).
EP00119970A 1999-09-24 2000-09-14 Calandre Expired - Lifetime EP1087057B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19945780A DE19945780C1 (de) 1999-09-24 1999-09-24 Kalander
DE19945780 1999-09-24

Publications (3)

Publication Number Publication Date
EP1087057A2 EP1087057A2 (fr) 2001-03-28
EP1087057A3 EP1087057A3 (fr) 2001-08-16
EP1087057B1 true EP1087057B1 (fr) 2004-02-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP00119970A Expired - Lifetime EP1087057B1 (fr) 1999-09-24 2000-09-14 Calandre

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US (1) US6701833B1 (fr)
EP (1) EP1087057B1 (fr)
DE (2) DE19945780C1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10206256B4 (de) * 2002-02-15 2006-09-21 Beiersdorf Ag Flächenkalandar und Flächenkalandrierverfahren
US20070018364A1 (en) * 2005-07-20 2007-01-25 Pierre Riviere Modification of nonwovens in intelligent nips
DE102007047658A1 (de) 2007-10-05 2009-04-09 Hte Ag The High Throughput Experimentation Company Parallelreaktor mit Anpressverschluss
CN108987148A (zh) * 2018-07-25 2018-12-11 山东星宇手套有限公司 一种开关支架

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1173599B (it) * 1984-05-10 1987-06-24 Carle & Montanri Spa Circuito di comando della pressione sui supporti dei cilindri di raffinatrici di cioccolato
DE3711334A1 (de) * 1987-04-03 1988-10-13 Escher Wyss Gmbh Vorrichtung zur fuehrung der walzen eines im wesentlichen vertikalen kalanders
DE3713561A1 (de) * 1987-04-23 1988-11-10 Escher Wyss Gmbh Kalander mit niprelieving
DE3715548A1 (de) 1987-05-09 1988-11-17 Voith Gmbh J M Walzenpresse mit einer vorrichtung zur entlastung der druckwalze
DE3803490A1 (de) 1988-02-05 1989-08-17 Rexroth Mannesmann Gmbh Sicherheitsanordnung fuer stellzylinder, insbesondere fuer kalander mit verstellbaren walzen
FI83346C (fi) * 1989-01-27 1991-06-25 Valmet Paper Machinery Inc Kalander, saerskilt en superkalander.
DE19511145C2 (de) * 1995-03-27 2000-07-13 Voith Sulzer Finishing Gmbh Kalander für die zweiseitige Papierbehandlung
FI107626B (fi) * 1996-05-06 2001-09-14 Metso Paper Inc Menetelmä kalanterin, etenkin superkalanterin telaston pika-avauksessa ja hydraulijärjestelmä kalanterin, etenkin superkalanterin telastoa varten
DE19633671C2 (de) 1996-08-21 1999-03-11 Voith Sulzer Finishing Gmbh Kalander
DE19729531C2 (de) * 1997-07-10 2002-12-12 Voith Paper Patent Gmbh Papierkalander
DE19820087B4 (de) * 1998-05-06 2005-06-23 Eduard Küsters Maschinenfabrik GmbH & Co. KG Kalander für die Behandlung einer Warenbahn
DE19832067B4 (de) * 1998-07-16 2005-04-21 Voith Paper Patent Gmbh Kalander für Bahnen aus Papier oder ähnlichem Material

Also Published As

Publication number Publication date
DE50005314D1 (de) 2004-03-25
EP1087057A2 (fr) 2001-03-28
US6701833B1 (en) 2004-03-09
DE19945780C1 (de) 2001-01-18
EP1087057A3 (fr) 2001-08-16

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