WO2005003662A2 - Sechoir a air chaud - Google Patents

Sechoir a air chaud Download PDF

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Publication number
WO2005003662A2
WO2005003662A2 PCT/DE2004/001336 DE2004001336W WO2005003662A2 WO 2005003662 A2 WO2005003662 A2 WO 2005003662A2 DE 2004001336 W DE2004001336 W DE 2004001336W WO 2005003662 A2 WO2005003662 A2 WO 2005003662A2
Authority
WO
WIPO (PCT)
Prior art keywords
hot flue
rollers
fabric
vector converter
drive
Prior art date
Application number
PCT/DE2004/001336
Other languages
German (de)
English (en)
Other versions
WO2005003662A3 (fr
Inventor
Kurt Fussnegger
Original Assignee
A. Monforts Textilmaschinen Gmbh & Co. Kg
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 A. Monforts Textilmaschinen Gmbh & Co. Kg filed Critical A. Monforts Textilmaschinen Gmbh & Co. Kg
Publication of WO2005003662A2 publication Critical patent/WO2005003662A2/fr
Publication of WO2005003662A3 publication Critical patent/WO2005003662A3/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/06—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement with movement in a sinuous or zig-zag path
    • F26B13/08—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement with movement in a sinuous or zig-zag path using rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
    • F26B13/14—Rollers, drums, cylinders; Arrangement of drives, supports, bearings, cleaning

Definitions

  • the invention relates to a hot flue with a package of top rollers and a package of bottom rollers, over which a spread textile web is to be fed up and down in a loop, at least a portion of the top and / or bottom rollers, the so-called conveyor rollers, at one speed is driven, which is dependent on the tension existing in the longitudinal direction of the web, and wherein the conveyor rollers are divided into roller groups of at least one conveyor roller.
  • the tension in the longitudinal direction of the fabric may depend on a change in length due to elongation or shrinkage of the web.
  • the roller groups should preferably be the same. It also relates to a method for operating the hotflue.
  • a hot flue generally has two series of guide rolls which are arranged essentially horizontally and parallel to one another, namely an upper roll package and a lower roll package, for loop-shaped feeding and unloading of a textile fabric or fabric spread over the roller packs.
  • Such a hotflue is described in DE 33 36 328 C2.
  • the textile fabric should run wrinkle-free and without sack formation through the hot flue, which means that it must neither be pulled nor conveyed too strongly or too weakly.
  • Stable goods should be conveyed through the hot flue with noticeable tension or longitudinal tension.
  • the lowest possible longitudinal tension should be exerted on knitwear.
  • care should also be taken to ensure that the permissible tensile stress values are observed not only during stationary operation but also when starting or braking quickly.
  • the rollers of the top roller package are usually driven.
  • the driven rollers are referred to as conveyor rollers.
  • a common type of drive for the conveyor rollers is a chain drive, which drives several or all of the rollers of a roller package together. If the goods undergo a change in length as they pass through the generally hot interior of the hot flue, the peripheral speed of the driven rollers must be adapted to these changes in length. This takes place in the aforementioned chain drive in that a friction clutch (slip or friction clutch) is switched on between the chain wheel driven by the chain and the pins of the respective conveyor roller itself.
  • a friction clutch slip or friction clutch
  • a friction drive for the conveying and deflecting rollers in machines for treating shrinking or elongating material webs is described in DE 958 106 A.
  • a drive belt engaging with variable slip on the conveying and deflecting rollers is provided as the friction drive.
  • a device for conveying tissue webs is described in CH 339 165 A.
  • the tissue should be transported with constant tension or practically tension-free. If the length of the web changes, for example by shrinking, a compensation of the peripheral speed of the conveyor rollers must be ensured.
  • This problem is solved in that some of the rollers are acted upon independently of the other rollers by drive means which have a flat speed-torque characteristic and whose speed at the maximum throughput speed is below the nominal speed lies.
  • the power transmitted by the drive means should just suffice to overcome the frictional resistance of the rollers assigned to them. This drive is not applicable to stretchy fabric.
  • Another type of drive is to drive one or a maximum of two conveyor rollers each directly from a separate drive motor, that is to say without the interposition of a friction.
  • the circumferential speed of the rollers is then adjusted to a change in the length of the goods by (manually) changing the engine speed, the speed of each roller or pair of rollers being individually adapted to the shrinking behavior of the goods.
  • the measurement and control effort required for this is also considerable.
  • a conveyor device for webs of fabric in which the web to be treated runs successively over a number of conveyor rollers, each of which is individually driven by a drive motor that runs independently of the other.
  • the fabric web is fed to the rollers at a speed which is below the nominal peripheral speed given by the respective motor.
  • all the motors are somewhat decelerated or braked by the web being fed in and the motors run faster or slower by themselves if this becomes necessary as a result of a change in the web length.
  • One disadvantage is that the motors influence each other. Each motor works back to the fabric feeder.
  • the individual fabric tensions behind the feed device add up, while the tension in front of the last transport roller is only determined by the motor belonging to it. The tissue tension is therefore not constant.
  • the goods possibly drawn through the hot flue from the outside must exert a circumferential force on the rollers, whereby a torque is generated which, among other things, compensates for the frictional torque of the roller bearings.
  • the longitudinal tension of the goods increases from roller to roller (seen in the conveying direction).
  • the fabric longitudinal tension is also increased if the fabric wants to shrink in the longitudinal direction between rollers that are rigidly driven at the same speed.
  • the visual fuselage forces that occur cannot be reduced at the same speed, they therefore increase the longitudinal tension of the goods.
  • the reverse is the case if the goods stretch between rollers that are driven at the same speed. In this case, the goods can detach from the lower deflection rollers and form so-called "bags".
  • the conveyor rollers are to be driven so that their speeds and thus their peripheral speeds adapt to the behavior of the goods; This means that when the goods shrink, the rollers have to turn slower and slower towards the end of the shrinking process - i.e. in the direction of conveyance - and vice versa always turn faster when the goods lengthen.
  • a proper flow of goods in the hot flue can also be seen in the case of goods that change in length, especially in the case of stretchable goods, if the longitudinal fabric tension at the inlet and outlet of the hot flue, e.g. with the help of a dancer roller measures and determines that the longitudinal fabric tension at the entrance and exit is the same. If this is achieved with a fabric web that becomes shorter or longer within the hot flue, this means that the conveying capacity of the rollers within the hot flue has been adapted to the change in length of the fabric web.
  • the invention has for its object to provide a drive system for the conveyor rollers within the hot flue, with which it is achieved that the speeds of the conveyor rollers adapt to the behavior of the goods and preferably the longitudinal tension of the fabric at the entrance and exit of the hot flue approximately then has the same value if the goods are elongated or shrunk within the hotflue.
  • the (driven) conveyor rollers should be controlled with as little effort as possible so that smooth, trouble-free running of the machine, both during normal continuous operation and when starting quickly, is to be ensured without creases and sacks. In particular strived for this purpose to create a single or group drive in the upper and / or lower roller packs of a hot flue, which allows the conveyor rollers to be controlled as a whole with a single control part.
  • the solution according to the invention is specified in the characterizing part of claim 1. It preferably consists in that a three-phase asynchronous motor is assigned to each conveyor roller group as the drive motor, that all asynchronous motors are electrically connected in parallel, connected to a common vector converter for speed control, and all are identical to one another except for one master motor and that the master motor alone has a speed control.
  • a vector converter is a converter that breaks down the electrical components into active current and apparent current.
  • the master motor is preferably controlled via a speed sensor. It should differ from the other motors precisely by this additionally provided, controllable speed sensor.
  • the conveying or transport speed of the fabric is determined by the master motor or its speed sensor.
  • the tensile stress exerted on the fabric is primarily determined by the force with which the goods are loaded at the entrance and exit of the hot flue.
  • the asynchronous motors and their vector converters provide for the speed compensation from conveyor roller to conveyor roller or from roller group to roller group that takes into account a change in length of the goods, taking advantage of the relationship between the slip and torque of these motors described below.
  • the course of the tensile stress acting on the fabric web within the hot flue can be regulated by control on the vector converter, namely can also be influenced by changing its frequency / voltage characteristic (F / U characteristic).
  • F / U characteristic frequency / voltage characteristic
  • the one or a single vector converter can control the entirety of the three-phase asynchronous motors connected in parallel in a conveyor roller group via a single feed line in such a way that the material tension is between the target and actual values -Value become the same or the pendulum comes to the center with pendulum control.
  • this achieves the following:
  • the machine runs smoothly and dynamically, both when starting quickly and when stopping quickly.
  • a uniform fabric tension even with shrinking goods between the individual rollers of each roller package; there are no overvoltages, nor are fabric bags formed.
  • the fabric tension between the rollers of a roller package is determined solely by the fabric tension in front of and behind the roller package. These voltages are expediently specified by a dancer or force measuring roller control.
  • the core of the invention is a conveyor roller drive with three-phase asynchronous motors connected in parallel and controlled by a vector converter.
  • the speed of such an asynchronous motor is determined by the frequency of the three-phase current and the slip described above, which is caused by the output torque. If all motors are electrically connected in parallel and all are of the same type or power, they deliver the same torque at the same speed.
  • the drives have to overcome the friction of the hot-flow rollers.
  • a conveyor roller package with two or more drives, including the guide motor, which are identical to one another can be controlled solely by a single vector converter in such a way that the drives deliver both a shrinking and an elongating fabric web with practically the longitudinal tension from the hot flue with which they are delivered the hotflue was delivered.
  • the goods tension required for perfect fabric conveying can be obtained from a so-called dancer or from a web tension control system - e.g. at the entrance and / or exit of the hotflue.
  • the resulting longitudinal tension in the fabric should be as low as possible with stretchable elastic fabric, while it is chosen to be relatively high in the case of rigid fabric to achieve a wrinkle-free run.
  • the measuring means e.g. B. a dancer or a force measuring bearing (the latter can be a load cell arranged in the roller bearing)
  • the material tension required for the operation of the hot flue is detected and thereby predetermined.
  • a position setpoint can be determined, with the help of a load cell (preferably arranged in the roller bearing) the linear force of the fabric can be determined accordingly.
  • the only master motor of a roll package of the hot flue is to be controlled by a speed sensor.
  • the set speed should be reported to the vector converter.
  • the master motor can be positioned anywhere within the respective roll package. It should not differ from the other motors by type or performance, but only by an added or attached speed encoder (e.g. resolver or incremental encoder).
  • the vector converter has a master setpoint on the one hand from a propulsion unit (preceding the controlled hotflue spatially) and, on the other hand, a position setpoint from a dancer provided on the hotflue, or from a web tension control system the (acting in the hotflue) Receives longitudinal tensile force of the goods.
  • the various motors should preferably drive the conveyor rollers of the hot flue via belts, preferably without a gear.
  • a goods shrinkage has a braking effect on the rollers. Therefore, the rear motors run somewhat slower than the front motors due to the slippage caused by the braking force, but they apply a higher torque. The higher moment leads to a higher fabric tension, which in turn affects the front rollers. As a result, the front rollers are pulled from the rear rollers, i.e. relieved, so they run faster. In this way, a new equilibrium is automatically established from the entrance to the exit of the hot flue without individual control of the conveyor rollers or conveyor roller groups being necessary. Because of this automatic balance control, the goods are not pulled too little or too much in any area.
  • Another advantage of the invention is that the fabric tension from roller to roller (or from roller group to roller group) within a roller package - to a certain extent superimposed on the automatic balance control according to the invention - is to be adjusted to the extent of the shrinkage overall in the case of goods shrinkage.
  • the drive parts concerned try to counteract the shrinkage, so that the fabric tension increases and decreases again along the hot flue - in the direction from the front to the rear rollers.
  • This force developing along the conveyor roller package can be controlled according to a further invention by setting the frequency / voltage characteristic (F / U characteristic) on the vector converter. If the voltage of the F / U characteristic curve is reduced, the engine slip is increased and the characteristic curve becomes softer. In this way, a constant fabric tension can be kept at a low value (flat F / U characteristic) even with stretchy, elastic fabric. The same applies to the lengthening of goods.
  • the vector converter should preferably have means for changing the slip of the connected three-phase asynchronous motors in such a way that the goods Tension is adapted to the behavior of the fabric in the hot flue.
  • the latter means preferably slip potentiometers, serve to influence the frequency-voltage characteristic.
  • the characteristic curve mentioned can be set “hard” or “soft”.
  • a hard characteristic curve allows small, a soft characteristic curve large speed deviations.
  • the slip should preferably be adjustable or changeable for all connected motors at the same time and in the same way by changing the F / U characteristic on the vector converter. In this way, if necessary, it should be achieved that all motors allow a small or large slip, and accordingly the possible speed deviations become small or large.
  • FIG. 1 shows the drive concept of a hotflue according to the invention
  • 2 distribution of forces on the conveyor rollers of a roller package 3
  • 3 shows the frequency / voltage characteristic (F / U characteristic) of a vector converter to be used according to the invention
  • FIG. 4 shows the fabric tension within the hot flue from conveyor roller group to conveyor roller group.
  • top rollers 2 within the top roller package are driven in groups of two conveyor rollers 6 each with a drive motor 7 via a belt 8.
  • the drive motors 7 are three-phase asynchronous motors. All motors 7 have the same power. These motors include the above-mentioned master motor 9, which can be attached anywhere in the area of the conveyor rollers 6 and is controlled by a speed sensor 10.
  • the speed sensor 10 is connected to a vector converter 12 via a line 11.
  • the motors 7 are all electrically connected in parallel and fed by the single vector converter 12.
  • the vector converter 12 receives a reference setpoint 14 from a pre-drive 13 and the line tension 16 from a force measurement bearing 15 - this is the actual fabric tension value of the fabric web - or the position setpoint of a dancer (in FIG. 2, number 17). It is thereby achieved that the vector converter 12 indirectly regulates the speeds of the various motors 7 in such a way that the target and actual values of the fabric tension 4 become the same.
  • the goods tension setpoint is set on a potentiometer 23 assigned to the vector converter 12.
  • the motors 7 are all electrically connected in parallel and are all of the same design, they deliver the same torque at the same speed and all pull the same amount on the fabric web 4. If the tensile force in front of and behind a group of conveyor rollers 6 is set to the same magnitude, the Motors 7 in stationary operation essentially only overcome the bearing friction of the rollers 2 and 3. Since all rollers 2 and 3 have the same mass, the electrical supply to all motors 7 can be adjusted by the vector converter 12 so that the actual product voltage in front of, within and behind each group of conveyor rollers 6 remains constant.
  • the drive system according to the invention therefore tries to counteract the effects of the shrinkage.
  • the force that is formed can be calculated and can be set within the scope of the invention by changing the F / U characteristic on a slip potentiometer 22 of the vector converter 12. With the help of one slip potentiometer 22, the slip values of all connected motors 7 should be able to be changed simultaneously and to the same extent.
  • An output line 24 of the vector converter 12 can supply the actual speed value as a master setpoint for a subsequent machine.
  • the upper rollers 2 of a hot flue 1 were divided into six groups, each with a drive motor 7.
  • the zero points of the abscissa and ordinate lie at the intersection of the dash-dotted straight line in FIG. 3.
  • the deviations from the moment zero - i.e. driving (+) and braking (- ) - are given in percent.
  • the slip speed is absolutely assigned to the torque, i.e. at low machine speeds, the slip is relatively (in percent) greater than at high speeds. From Fig. 3 it can be seen that the slip speed increases when the motor voltage in the F / U characteristic is reduced from 100% to 50% (transition from characteristic 25 to 26). For example, by reducing the F / U characteristic to 50%, the slip speed is increased fourfold.
  • FIG. 4 shows an example of the course of the fabric tension P within a roll package - from A to B in FIG. 1 - for the case of 12% fabric shrinkage and a fabric transport speed of 50 m / min.
  • the drawing shows the course of the fabric tension along the six groups of conveyor rollers 6 (each with a drive motor 7) along the hot flue 1, which are assumed in the above example.
  • the strongly drawn staircase line 27 represents the case in which the motors 7 are excited by the vector converter 12 with 100% motor excitation (F / U characteristic 25 of FIG. 3).

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)

Abstract

La présente invention concerne une unité d'entraînement par rouleaux entraînés d'un séchoir à air chaud, qui comporte plusieurs moteurs d'entraînement par groupe de rouleaux. Pour faire en sorte que les moteurs d'entraînement produisent, tant en cas de fonctionnement stationnaire que de démarrage ou de freinage rapide de la machine, une tension régulière du tissu, même pour du tissu rétrécissant, entre les différents rouleaux du groupe de rouleaux, les moteurs d'entraînement sont des moteurs asynchrones couplés électriquement en parallèle, connectés à un convertisseur vectoriel et identiques les uns aux autres, à l'exception d'un moteur de commande. Selon la présente invention, le convertisseur vectoriel possède des moyens permettant l'ajustement de la vitesse de glissement des moteurs.
PCT/DE2004/001336 2003-06-28 2004-06-25 Sechoir a air chaud WO2005003662A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10329218.7 2003-06-28
DE2003129218 DE10329218B4 (de) 2003-06-28 2003-06-28 Hotflue

Publications (2)

Publication Number Publication Date
WO2005003662A2 true WO2005003662A2 (fr) 2005-01-13
WO2005003662A3 WO2005003662A3 (fr) 2005-03-31

Family

ID=33521158

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2004/001336 WO2005003662A2 (fr) 2003-06-28 2004-06-25 Sechoir a air chaud

Country Status (2)

Country Link
DE (1) DE10329218B4 (fr)
WO (1) WO2005003662A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006060183B4 (de) * 2006-12-20 2009-12-10 A. Monforts Textilmaschinen Gmbh & Co. Kg Hotflue
DE102011102789A1 (de) 2011-03-08 2012-09-13 Getrag Getriebe- Und Zahnradfabrik Hermann Hagenmeyer Gmbh & Co. Kg Hybrid-Antriebsstrang
IT201800010838A1 (it) * 2018-12-05 2020-06-05 Montex Srl Apparato per la preparazione di cotone imbevuto.
CN112050597B (zh) * 2020-08-28 2021-11-16 泉州台商投资区飞翔机械设计服务中心 一种染布料烘干收卷装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE690625C (de) 1938-07-23 1940-04-30 Proctor & Schwartz Inc insbesondere in Trocknern
DE958106C (de) 1952-06-01 1957-02-14 Haas Friedrich Maschf Friktionsantrieb fuer die Foerder- und Umlenkwalzen in Maschinen zum Behandeln schrumpfender oder sich laengender Textil-, Papier- oder sonstiger Stoffbahnen
CH339165A (de) 1955-11-21 1959-06-30 Benninger Ag Maschf Vorrichtung zur Förderung von Gewebebahnen
DE3336328C2 (de) 1983-10-06 1986-04-10 A. Monforts GmbH & Co, 4050 Mönchengladbach Hotflue

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5588224A (en) * 1995-06-07 1996-12-31 Egs Americas, Inc. Chill roll assembly

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE690625C (de) 1938-07-23 1940-04-30 Proctor & Schwartz Inc insbesondere in Trocknern
DE958106C (de) 1952-06-01 1957-02-14 Haas Friedrich Maschf Friktionsantrieb fuer die Foerder- und Umlenkwalzen in Maschinen zum Behandeln schrumpfender oder sich laengender Textil-, Papier- oder sonstiger Stoffbahnen
CH339165A (de) 1955-11-21 1959-06-30 Benninger Ag Maschf Vorrichtung zur Förderung von Gewebebahnen
DE3336328C2 (de) 1983-10-06 1986-04-10 A. Monforts GmbH & Co, 4050 Mönchengladbach Hotflue

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
WALTER BERNARD: "Appretur der Textilien", 1967, pages: 123 - 124

Also Published As

Publication number Publication date
DE10329218B4 (de) 2007-05-16
WO2005003662A3 (fr) 2005-03-31
DE10329218A1 (de) 2005-01-20

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