EP2576897B1 - Dispositif de commande de position et systeme de commande de position - Google Patents

Dispositif de commande de position et systeme de commande de position Download PDF

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Publication number
EP2576897B1
EP2576897B1 EP11720814.0A EP11720814A EP2576897B1 EP 2576897 B1 EP2576897 B1 EP 2576897B1 EP 11720814 A EP11720814 A EP 11720814A EP 2576897 B1 EP2576897 B1 EP 2576897B1
Authority
EP
European Patent Office
Prior art keywords
drive
positioning
positioning drive
housing
motor
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.)
Active
Application number
EP11720814.0A
Other languages
German (de)
English (en)
Other versions
EP2576897A1 (fr
Inventor
Peter Biener
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 Patent GmbH
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Publication date
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP2576897A1 publication Critical patent/EP2576897A1/fr
Application granted granted Critical
Publication of EP2576897B1 publication Critical patent/EP2576897B1/fr
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/08—Regulating consistency
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/02—Head boxes of Fourdrinier machines
    • D21F1/022—Means for injecting material into flow within the headbox

Definitions

  • the invention relates to a position drive and a position drive system for driving valves, in particular dilution water valves, as used in fibrous web manufacturing machines.
  • fiber web manufacturing machines have a headbox, which is supplied via a plurality of lines from a distributor with stock suspension, wherein the individual volume flows are regulated by adjustable valves.
  • a further sectional material feed into the head box takes place.
  • a mixing device is for example from the patent application DE 40 19 593 known.
  • a mixing device is presented, which serves to mix several partial flow rates such that a constant mixture volume flow is formed.
  • partial volume flows are guided in mixers and regulated by application of a complex valve control in dependence on each other by means of positioning drives.
  • the aim is to regulate the basis weight of the fibrous web such that the basis weight in the transverse direction is as constant as possible. This is done by means of a plurality of juxtaposed valves, a so-called array.
  • All valves have an actuator or positioner that regulates the addition of dilution water.
  • a well-known position drive is housed in a multi-part, screwed stainless steel drive housing.
  • an encoder is installed in the housing.
  • the positioning drives include their own control electronics, with an array of positioning drives connected in series with each other. If a positioning drive fails, the whole array is inoperable.
  • a CD profiling device consists of up to 200 positioning drives, a very complex procedure.
  • the object of the invention is to provide a positioning drive and a positioning drive system, which (s) has an increased operational safety and service life and also reduces maintenance.
  • a position drive for driving valves of the type mentioned according to the invention in that a stepper motor or a synchronous motor is used as the drive motor, which is controlled by an outside of the drive housing arranged control unit, wherein the displacement of the push rod on the count the full steps of the stepping motor is determined.
  • the positioning drive according to the present invention contains substantially fewer components, compared to a drive according to the prior art, whereby the reliability is significantly increased.
  • the stepper motor is dimensioned so that its holding torque (also crawl) copes with the maximum occurring force without losing a full step.
  • the limit switches can be approached alternately counting the number of full steps necessary to move the push rod completely from one end position to the other. This is preferably done at the lowest speed to preclude a path error.
  • the drive housing made of anodized aluminum, which can be particularly well connected by the hybrid joining technique and also ensures adequate protection against the aggressive external influences.
  • the position drive system according to the invention for use in a CD Profiltechniks worn, with position actuators having one of the above feature combination, solves the problem in that the control is carried out to control the stepper motors or synchronous motors of the position of the valves valves via a central control unit, the positioned at a central place and wired to the positioner drive.
  • the stepper motors are controlled independently of each other by the control unit, so that when a position drive fails, it can be directly and uniquely identified, but it does not lead to a failure of the entire CD profiling device comes.
  • each position drive it is proposed to ascertain the travel path of each position drive, the limit switches, each position drive, and to count the full steps. This should preferably be done the first time it is switched on and can be repeated at each standstill, as long as the process allows it.
  • the limit switches are approached in the determination of the travel, with the smallest engine speed and the largest engine torque. This ensures that all full steps are recorded and that in operation the positioning of the push rod and thus the valve position is very accurate.
  • stepper motors or synchronous motors it is advantageous to dynamically control the stepper motors or synchronous motors by e.g. Before each trip, a calculation of an acceleration ramp, the travel speed and the deceleration ramp takes place.
  • a method of the axis is carried out from the viewpoint that each step pulse is executed exactly and is not blocked by too low torque or influenced by overshoot.
  • FIG. 1 is a positioning drive 7, shown with valve 6, speaking the prior art.
  • Positionierantriebsgekoruse 9 is a push rod 10, which protrudes from the Positionierantriebgephaseuse 9 and is mounted axially displaceable in this, a spindle drive 11 for axial displacement of the push rod 10, a drive motor 12 and the control electronics 13 and an encoder 14, for accurately determining the position of the Push rod10, housed.
  • the control electronics 13 of the individual positioning drives 7 are interconnected by means of a series circuit, so that the signals of the CD control device 1 must be passed in sequence through all the electronics of the positioning drives. The failure of a control electronics thus causes the failure of the whole array, so no CD control can be done.
  • FIG. 2 shows a positioning according to the invention 7, which consists of significantly fewer components.
  • the substantially cylindrical drive housing 9 is provided with a connection flange with which the positioning drive is attached to the valve 6.
  • the push rod 10 is as usual, slidably mounted in the drive housing 9 and protrudes out of the housing.
  • connection cable 19 is provided which connects the stepping motor 17 and the limit switches 15,16 with the control unit 4.
  • the drive housing 9 consists of several parts, which are made of aluminum full material. The individual parts are after the assembly of the drive components 10, 11,15,16,17 and 19 by a hybrid joining technique (bonding and shape-changing pressing) permanently, tightly and no longer releasably connected together.
  • the life of the position drive 7 will also increase because the necessary control electronics 13 is no longer installed in the drive housing 9, but in a remote electronics box, which can control up to 8 position actuators and installed in a suitably protected cabinet.
  • the distance between control electronics and position drive can be up to 15m.
  • FIG. 3 is a schematic overview of a CD control device 1 is shown.
  • the CD control device 1 consists of a CD Profiltechniks worn 2, a control unit 4 and a measuring frame with which the basis weight and moisture profile is measured.
  • the CD profiling device 2 consists of up to 200 valve units 6, with which the basis weight in the transverse direction (CD), by adding dilution water 8, is regulated.
  • Each valve unit consists of a valve 6, which is controlled by a positioning drive 7.
  • the CD profiling unit may consist of a plurality of control units 4, wherein a plurality of positioning drives 7 are connected to each control unit 4. Preferably, eight positioning units 7 are connected to a control unit 4.

Landscapes

  • Electrically Driven Valve-Operating Means (AREA)

Claims (11)

  1. Dispositif de commande de position (7) pour la commande de soupapes (6), en particulier de soupapes d'eau de dilution telles qu'elles sont utilisées dans des machines de fabrication de nappe fibreuse, constitué d'un boîtier de commande (9), d'une tige poussoir (10) qui fait sailli hors du boîtier de commande et qui est supporté de manière déplaçable axialement dans celui-ci, d'une commande de broche (11) pour le déplacement axial de la tringle de poussée (10) et d'un moteur d'entraînement (12),
    caractérisé en ce que
    le moteur d'entraînement (12) est un moteur pas-à-pas (17) ou un moteur synchrone, lequel peut être réglé à partir d'une unité de commande (4) disposée à l'extérieur du boîtier de commande (9), la course de déplacement de la tige poussoir (10) étant déterminée par le biais du compte des pas complets du moteur pas à pas (17).
  2. Dispositif de commande de position selon la revendication 1,
    caractérisé en ce que
    des commutateurs de fin de course (15, 16) sont positionnés au niveau des extrémités de fin de course de la tige poussoir, avec lesquels commutateurs les positions de fin de course de la tige poussoir (10) peuvent être déterminées.
  3. Dispositif de commande de position selon la revendication 1 ou 2,
    caractérisé en ce que
    le boîtier de commande (9) est réalisé d'une seule pièce.
  4. Dispositif de commande de position selon la revendication 3,
    caractérisé en ce que
    le boîtier de commande (9) est constitué d'au moins deux composants de boîtier qui sont assemblés l'un à l'autre d'une seule pièce de manière permanente par une technique d'assemblage hybride.
  5. Dispositif de commande de position selon la revendication 3 ou 4,
    caractérisé en ce que
    le boîtier de commande (9) se compose de profilés massifs en aluminium anodisé.
  6. Système de commande de position pour l'utilisation dans un dispositif de profilage CD, en particulier pour la régulation de soupapes d'eau de dilution telles qu'elles sont utilisées dans des machines de fabrication de nappe fibreuse, comprenant un dispositif de commande de position (7) selon l'une quelconque des revendications 1 à 5 et une unité de commande (4),
    caractérisé en ce que
    la commande pour la régulation des moteurs pas à part (17) ou des moteurs synchrones des dispositifs de commande de position des soupapes s'effectuant par le biais d'une unité de commande centrale (4) qui est positionnée en un emplacement central et qui est câblée avec les dispositifs de commande de position (7).
  7. Système de commande de position selon la revendication 6,
    caractérisé en ce que
    les moteurs pas à pas (17) sont commandés indépendamment les uns des autres par l'unité de commande (4).
  8. Système de commande de position selon la revendication 6 ou 7,
    caractérisé en ce que
    pour déterminer la course de déplacement de chaque dispositif de commande de position (7), les commutateurs de fin de course (15, 16) de chaque dispositif de commande position (7) sont mis en route et les pas complet sont calculés.
  9. Système de commande de position selon la revendication 8,
    caractérisé en ce que
    les commutateurs de fin de course (15, 16) sont mis en marche avec la plus faible vitesse de rotation du moteur et le plus grand couple moteur.
  10. Système de commande de position selon la revendication 6,
    caractérisé en ce que
    les moteurs pas à pas (17) sont régulés dynamiquement.
  11. Système de commande position selon la revendication 6,
    caractérisé en ce que
    la commande se compose de plusieurs unités de commandes (4) qui commandent à chaque fois plusieurs dispositifs de commande de position (7).
EP11720814.0A 2010-06-01 2011-05-24 Dispositif de commande de position et systeme de commande de position Active EP2576897B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010029602 DE102010029602A1 (de) 2010-06-01 2010-06-01 Positionierantrieb und Positionierantriebssystem
PCT/EP2011/058485 WO2011151227A1 (fr) 2010-06-01 2011-05-24 Dispositif de commande de position et système de commande de position

Publications (2)

Publication Number Publication Date
EP2576897A1 EP2576897A1 (fr) 2013-04-10
EP2576897B1 true EP2576897B1 (fr) 2014-03-12

Family

ID=44119232

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11720814.0A Active EP2576897B1 (fr) 2010-06-01 2011-05-24 Dispositif de commande de position et systeme de commande de position

Country Status (4)

Country Link
EP (1) EP2576897B1 (fr)
CN (1) CN102918203B (fr)
DE (1) DE102010029602A1 (fr)
WO (1) WO2011151227A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4019593C2 (de) 1990-06-20 1994-01-20 Voith Gmbh J M Stoffauflauf für Papiermaschinen
US5707495A (en) * 1990-06-20 1998-01-13 J.M. Voith Gmbh Headbox for papermaking machine with more uniform flow
FI122820B (fi) 2004-04-30 2012-07-13 Vaahto Oy Laitteisto väliainevirtauksen säätämiseksi
CN101392471B (zh) * 2008-10-23 2011-09-07 华南理工大学 一种流浆箱的稀释水环形添加装置

Also Published As

Publication number Publication date
CN102918203B (zh) 2016-02-17
EP2576897A1 (fr) 2013-04-10
CN102918203A (zh) 2013-02-06
DE102010029602A1 (de) 2011-12-01
WO2011151227A1 (fr) 2011-12-08

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