EP2576897B1 - Positioning drive and positioning drive system - Google Patents

Positioning drive and positioning drive system 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
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Prior art keywords
drive
positioning
positioning drive
housing
motor
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EP11720814.0A
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German (de)
French (fr)
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EP2576897A1 (en
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Peter Biener
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Voith Patent GmbH
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Voith Patent GmbH
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    • 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.

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  • Electrically Driven Valve-Operating Means (AREA)

Description

Die Erfindung betrifft einen Positionsantrieb und ein Positionsantriebsystem zum Antrieb von Ventilen, insbesondere von Verdünnungswasserventilen, wie sie in Faserstoffbahnherstellungsmaschinen eingesetzt werden.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.

Es ist bekannt, dass Faserbahnherstellungsmaschinen einen Stoffauflauf aufweisen, der über eine Vielzahl von Leitungen aus einem Verteiler mit Stoffsuspension versorgt wird, wobei die einzelnen Volumenströme durch einstellbare Ventile geregelt werden.It is known that 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.

Weiterhin ist bekannt, dass zur Regelung des Flächengewichtes eine weitere sektionale Stoffzuführung in den Stoffauflauf erfolgt. Eine derartige Mischeinrichtung ist Beispielsweise aus der Patentanmeldung DE 40 19 593 bekannt. Hier wird eine Mischeinrichtung vorgestellt, die dazu dient, mehrere Teilvolumenströme derart zu mischen, dass ein konstanter Gemischvolumenstrom entsteht. Hierzu werden Teilvolumenströme in Mischer geführt und durch Anwendung einer aufwendigen Ventilsteuerung in Abhängigkeit voneinander mittels Positionierantrieben geregelt.Furthermore, it is known that, to control the weight per unit area, a further sectional material feed into the head box takes place. Such a mixing device is for example from the patent application DE 40 19 593 known. Here, a mixing device is presented, which serves to mix several partial flow rates such that a constant mixture volume flow is formed. For this purpose, 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.

Ziel ist es, das Flächengewicht der Faserstoffbahn derart zu regeln, dass das Flächengewicht in Querrichtung möglichst konstant ist. Dies geschieht mit Hilfe einer Vielzahl von nebeneinander angeordneten Ventilen, einem sogenannten Array.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.

Alle Ventile verfügen über einen Aktuator oder Positionsantrieb, durch den die Zugabe von Verdünnungswasser geregelt wird.All valves have an actuator or positioner that regulates the addition of dilution water.

In der EP 1591 585 A1 wird hierzu ein Positionsantrieb sowie ein Positionsantriebssystem offenbart.In the EP 1591 585 A1 For this purpose, a position drive and a position drive system is disclosed.

Ein bekannter Positionsantrieb ist in einem mehrteiligen, verschraubten Antriebsgehäuse aus Edelstahl untergebracht. Zur Überwachung der Schubstangenposition ist im Gehäuse ein Encoder eingebaut.A well-known position drive is housed in a multi-part, screwed stainless steel drive housing. To monitor the push rod position, an encoder is installed in the housing.

Zudem beinhaltet der Positionierantriebe eine eigene Steuerungselektronik, wobei ein Array von Positionierantrieben in Reihe miteinander verschaltet ist. Fällt also ein Positionierantrieb aus, ist der ganze Array funktionslos.In addition, 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.

Durch die mehrteilige Ausführung des Gehäuses kommt es aufgrund der extremen Umwelteinflüsse wie Wasser, Vibration, Temperatur und/oder Chemikalien über die Zeit relativ häufig zu Undichtigkeiten, wodurch Maschinenstörungen verursacht werden.Due to the extreme environmental influences such as water, vibration, temperature and / or chemicals, the multi-part design of the housing causes leaks relatively frequently over time, which causes machine malfunctions.

Um vorbeugende Maßnahmen der Wartung zu erfüllen, müssen heutzutage die Positionierantriebe in regelmäßigen Abständen geprüft werden. Dies ist, durch die große Anzahl der Positionierantriebe, eine CD Profilierungseinrichtung besteht aus bis zu 200 Positionierantrieben, eine sehr aufwendige Prozedur.To meet preventive measures of maintenance, nowadays the positioning drives must be checked at regular intervals. This is, due to the large number of positioning drives, a CD profiling device consists of up to 200 positioning drives, a very complex procedure.

Aufgabe der Erfindung ist es einen Positionierantrieb und ein Positionierantriebsystem bereitzustellen, welcher (s) eine erhöhte Betriebsicherheit und Standzeit aufweißt und zudem den Wartungsaufwand reduziert.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.

Diese Aufgabe wird mit einem Positionsantrieb zum Antrieb von Ventilen der eingangs genannten Art erfindungsgemäß dadurch gelöst, dass als Antriebsmotor ein Schrittmotor bzw. ein Synchronmotor verwendet wird, der von einer außerhalb des Antriebsgehäuses angeordneten Steuereinheit aus regelbar ist, wobei der Verschiebeweg der Schubstange über die Zählung der Vollschritte des Schrittmotors bestimmt wird.This object is achieved with 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.

Somit enthält der Positionierantrieb gemäß der vorliegenden Erfindung wesentlich weniger Bauteile, gegenüber einem Antrieb gemäß dem Stand der Technik, wodurch die Betriebssicherheit wesentlich erhöht wird.Thus, 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.

Der Schrittmotor ist dabei so bemessen, dass sein Haltemoment (auch Schleichfahrt) die maximal vorkommende Kraft bewältigt, ohne einen Vollschritt zu verlieren.The stepper motor is dimensioned so that its holding torque (also crawl) copes with the maximum occurring force without losing a full step.

Des Weiteren wird vorgeschlagen, an den Endpositionen der Schubstange Endschalter zu positionieren, mit denen die Endpositionen der Schubstange bestimmbar sind.Furthermore, it is proposed to position limit switches at the end positions of the push rod, with which the end positions of the push rod can be determined.

Die Endschalter können wechselweise angefahren und dabei die Anzahl der Voll-schritte mitgezählt werden, die notwendig sind, um die Schubstange vollständig von einer Endposition zur Anderen zu verschieben. Dies erfolgt vorzugsweise mit der kleinsten Geschwindigkeit, um einen Wegfehler auszuschließen.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.

Durch ein einteilig ausgeführtes Antriebsgehäuse bzw. die Ausführung des Antriebsgehäuses aus mind. zwei Gehäusekomponenten, die durch eine Hybrid-Füge-Technik dauerhaft einteilig miteinander verbundnen sind, aus dem nur die bewegliche Schubstange herausragt und das Steuerkabel durchgeführt wird, ist sichergestellt, dass keine unnötige Verbindungsstelle vorhanden ist, die eine Undichtigkeit verursachen kann.By a one-piece designed drive housing or the execution of the drive housing from at least two housing components that are permanently integrally interconnected by a hybrid joining technique, from which protrudes only the movable push rod and the control cable is performed, it is ensured that no unnecessary Junction is present, which can cause a leak.

Vorzugsweise besteht das Antriebsgehäuse aus eloxiertem Aluminium, welches sich besonders gut durch die Hybrid-Füge-Technik verbinden lässt und zudem einen ausreichenden Schutz vor den aggressiven äußeren Einflüssen gewährleistet.Preferably, 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.

Das erfindungsgemäße Positionsantriebssystem für den Einsatz in einer CD Profilierungseinrichtung, mit Positionsantrieben, die eine der oben angegebenen Merkmals-kombination aufweisen, löst die Aufgabe dadurch, dass die Steuerung zur Regelung der Schrittmotoren bzw. Synchronmotoren der Positionsantriebe der Ventile über eine zentrale Steuereinheit erfolgt, die an einem zentralen Platz positioniert und mit dem Positionsantrieben verkabelt ist.The position drive system according to the invention for use in a CD Profilierungseinrichtung, 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.

Die Schrittmotoren von der Steuereinheit aus unabhängig voneinander gesteuert werden, sodass beim Ausfall eines Positionsantriebes dieser direkt und eindeutig identifiziert werden kann, es aber nicht zu einem Ausfall der gesamten CD Profilie-rungseinrichtung kommt.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.

Des Weiteren wird vorgeschlagen, zur Ermittlung des Verfahrweges jedes Positionsantriebes die Endschalter, jedes Positionsantriebes, anzufahren und dabei die Vollschritte zu zählen. Dies sollte vorzugsweise beim ersten Einschalten geschehen und kann bei jedem Stillstand, sofern es der Prozess zulässt, wiederholt werden. Vorzugsweise werden die Endschalter, bei der Ermittlung des Verfahrweges, mit der kleinsten Motordrehzahl und dem größten Motormoment angefahren. So ist sichergestellt, dass alle Vollschritte erfasst werden und es im Betrieb zu einer sehr genauen Positionierung der Schubstange und damit der Ventilstellung kommt.Furthermore, 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. Preferably, 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.

Weiterhin ist es vorteilhaft, die Schrittmotoren bzw. Synchronmotoren dynamisch zu regeln, indem z.B. vor jeder Fahrt eine Berechnung einer Beschleunigungsrampe, der Verfahrgeschwindigkeit und der Verzögerungsrampe erfolgt. Ein Verfahren der Achse erfolgt unter dem Gesichtspunkt, dass jeder Schrittimpuls exakt ausgeführt wird und nicht durch zu geringes Drehmoment blockiert oder durch Überschwingen beeinflusst wird.Furthermore, 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.

Nachfolgend wird die Erfindung anhand von Skizzen näher erläutert und ein Ausführungsbeispiel dargestellt. Die Figuren zeigen beispielhaft:

Figur 1
ein Positionierantrieb mit Ventil sprechend dem Stand der Technik
Figur 2
ein erfindungsgemäßen Positionierantrieb
Figur 3
eine schematische Übersicht von einer CD Regeleinrichtung
The invention will be explained in more detail with reference to drawings and an embodiment shown. The figures show by way of example:
FIG. 1
a positioning actuator with valve speaking the prior art
FIG. 2
a positioning drive according to the invention
FIG. 3
a schematic overview of a CD control device

In Figur 1 ist ein Positionierantrieb7, mit Ventil 6, sprechend dem Stand der Technik gezeigt. Im Positionierantriebsgehäuse 9 ist eine Schubstange 10, die aus dem Positionierantriebgehäuse 9 herausragt und in diesem axial verschiebbar gelagert ist, ein Spindelantrieb 11 zur axialen Verschiebung des Schubgestänges 10, ein Antriebsmotor 12 sowie die Steuerelektronik 13 und eine Encoder 14, zur genauen Ermittlung der Position der Schubstange10, untergebracht.In FIG. 1 is a positioning drive 7, shown with valve 6, speaking the prior art. In Positionierantriebsgehäuse 9 is a push rod 10, which protrudes from the Positionierantriebgehäuse 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.

Um all diese Komponenten in einem Gehäuse 9 unterzubringen, ist ein sehr aufwendiger Aufbau des Gehäuses 9 notwendig. Zudem ist es erforderlich das Gehäuse 9 mittels mehrerer Schraubverbindungen lösbar zu verschließen, um zu Wartungszwecken dieses öffnen zu können.To accommodate all these components in a housing 9, a very complex structure of the housing 9 is necessary. In addition, it is necessary to detachably close the housing 9 by means of a plurality of screw connections in order to be able to open it for maintenance purposes.

Die Steuerelektroniken 13 der einzelnen Positionierantriebe 7 sind mittels einer Reihenschaltung miteinander verbunden, sodass die Signale der CD Regelungseinrichtung 1 der Reihe nach durch alle Elektroniken der Positionierantriebe geleitet werden muss. Der Ausfall einer Steuerelektronik verursacht somit den Ausfall des ganzen Arrays, sodass keine CD Regelung mehr erfolgen kann.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.

Figur 2 zeigt einen erfindungsgemäßen Positionierantrieb 7, der aus wesentlich weniger Komponenten besteht. Das im Wesentlichen zylindrische Antriebsgehäuse 9 ist mit einem Anschlussflansch versehen, mit dem der Positionierantrieb an dem Ventil 6 befestigt wird. 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.

Die Schubstange 10 ist wie gehabt, im Antriebsgehäuse 9 verschiebbar gelagert und ragt aus dem Gehäuse heraus.The push rod 10 is as usual, slidably mounted in the drive housing 9 and protrudes out of the housing.

Im Gehäuse befinden sich im Wesentlichen nur ein Schrittmotor 17, ein Spindelantrieb 11 sowie zwei Endschalter 15,16. Wobei ein Anschlusskabel 19 vorgesehen ist welches den Schrittmotor 17 und die Endschalter 15,16 mit der Steuerungseinheit 4 verbindet.In the housing are essentially only a stepper motor 17, a spindle drive 11 and two limit switches 15,16. Wherein a connection cable 19 is provided which connects the stepping motor 17 and the limit switches 15,16 with the control unit 4.

Bauartenbedingt ist der Weg zwischen den Endschaltern 15,16 bekannt oder kann bei der Erstinbetriebnahme-Messung, durch die Zählung der Vollschritte, genau ermittelt werden.Due to the design of the way between the limit switches 15,16 is known or can be accurately determined in the initial commissioning measurement, by counting the full steps.

Das Antriebsgehäuse 9 besteht aus mehreren Teilen, die aus Aluminiumvollmaterial gefertigt sind. Die einzelnen Teile werden nach der Montage der Antriebsbauteile 10, 11,15,16,17 und 19 durch eine Hybrid-Füge-Technik (kleben und formveränderndes Pressen) dauerhaft, dicht und nicht mehr lösbar miteinander verbunden.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.

Die Standzeit des Positionsantriebs 7 wird zudem erhöhen, da die notwendige Steuerelektronik 13 nicht mehr in dem Antriebsgehäuse 9 eingebaut ist, sondern in einer abgesetzten Elektronikbox, die bis zu 8 Positionsantriebe steuern und in einem entsprechend geschützten Schrank eingebaut sein kann. Die Entfernung zwischen Steuerelektronik und Positionsantrieb kann bis zu 15m betragen.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.

In der Figur 3 ist eine schematische Übersicht einer CD Regeleinrichtung 1 dargestellt. Die CD Regeleinrichtung 1 besteht aus einer CD Profilierungseinrichtung 2, einer Steuereinheit 4 sowie einem Messrahmen, mit dem das Flächengewichts- und Feuchtequerprofil gemessen wird. Wobei die CD Profilierungseinrichtung 2 aus bis zu 200 Ventileinheiten 6 besteht, mit denen das Flächengewicht in Querrichtung (CD), durch Zugabe von Verdünnungswasser 8, geregelt wird. Jede Ventileinheit besteht aus einem Ventil 6, welche von einem Positionierantrieb 7 angesteuert wird.In the FIG. 3 is a schematic overview of a CD control device 1 is shown. The CD control device 1 consists of a CD Profilierungseinrichtung 2, a control unit 4 and a measuring frame with which the basis weight and moisture profile is measured. Wherein 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.

Die CD Profilierungseinheit kann aus mehreren Steuereinheiten 4 bestehen, wobei an jeder Steuereinheit 4 mehrere Positionierantriebe 7 angeschlossen sind. Vorzugsweise werden acht Positioniereinheiten 7 an einer Steuereinheit 4 angeschlossen.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.

Vorteile der vorliegenden Erfindung sind:

  • kostengünstiger und robuster Aufbau der Positionierantriebe
  • einfache Lokalisierung von Fehlerquellen
Advantages of the present invention are:
  • cost-effective and robust design of the positioning drives
  • easy localization of error sources

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
CD RegeleinrichtungCD control device
22
CD ProfilierungseinrichtungCD profiling device
33
Messrahmenmeasuring frame
44
Steuereinheitcontrol unit
55
Stoffauflaufheadbox
66
VentilValve
77
Positionsantriebpositioning drive
88th
Verdünnungswasserdilution water
99
Antriebsgehäusedrive housing
1010
Schubstangepushrod
1111
Spindelantriebspindle drive
1212
Antriebsmotordrive motor
1313
Steuerelektronikcontrol electronics
1414
Encoderencoder
1515
erster Endschalterfirst limit switch
1616
zweiter Endschaltersecond limit switch
1717
Schrittmotorstepper motor
1818
Gehäuseverbindunghousing connection
1919
Anschlusskabelconnection cable

Claims (11)

  1. Positioning drive (7) for driving valves (6), in particular dilution water valves such as are used in fibrous web production machines, comprising a drive housing (9), a thrust rod (10) which projects out of the drive housing and is axially displaceably mounted in the latter, a spindle drive (11) for the axial displacement of the thrust linkage (10), and a drive motor (12),
    characterized in that
    the drive motor (12) is a stepping motor (17) or a synchronous motor, which can be controlled by a control unit (4) arranged outside the drive housing (9), the displacement travel of the thrust rod (10) being determined via counting the full steps of the stepping motor (17).
  2. Positioning drive according to Claim 1,
    characterized in that
    end switches (15, 16) with which the end positions of the thrust rod (10) can be determined, are positioned at the end positions of the thrust rod.
  3. Positioning drive according to Claim 1 or 2,
    characterized in that
    the drive housing (9) is designed in one piece.
  4. Positioning drive according to Claim 3,
    characterized in that
    the drive housing (9) is built up from at least two housing components, which are connected permanently together in one piece by means of a hybrid joining technique.
  5. Positioning drive according to Claim 3 or 4,
    characterized in that
    the drive housing (9) consists of anodized aluminium solid profiles.
  6. Positioning drive system for use in a CD profiling apparatus, in particular for controlling dilution water valves such as are used in fibrous web production machines, having a positioning drive (7) according to one of Claims 1 to 5 and a control unit (4),
    characterized in that
    the control system for controlling of the stepping motors (17) or synchronous motors of the positioning drives of the valves is provided via a central control unit (4), which is positioned in a central place and is connected to the positioning drives (7) by cables.
  7. Positioning drive system according to Claim 6,
    characterized in that
    the stepping motors (17) are controlled independently of one another by the control unit (4).
  8. Positioning drive system according to Claim 6 or 7,
    characterized in that
    to determine the travel of each positioning drive (7), the end switches (15, 16) of each positioning drive (7) are driven to and the full steps are counted in the process.
  9. Positioning drive system according to Claim 8,
    characterized in that
    the end switches (15, 16) are driven to with the lowest motor speed and the highest motor torque.
  10. Positioning drive system according to Claim 6,
    characterized in that
    the stepping motors (17) are controlled dynamically.
  11. Positioning drive system according to Claim 6,
    characterized in that
    the control system comprises multiple control units (4), which each control multiple positioning drives (7).
EP11720814.0A 2010-06-01 2011-05-24 Positioning drive and positioning drive system Active EP2576897B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010029602 DE102010029602A1 (en) 2010-06-01 2010-06-01 Positioning drive and positioning drive system
PCT/EP2011/058485 WO2011151227A1 (en) 2010-06-01 2011-05-24 Positioning drive and positioning drive system

Publications (2)

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

Family

ID=44119232

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11720814.0A Active EP2576897B1 (en) 2010-06-01 2011-05-24 Positioning drive and positioning drive system

Country Status (4)

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

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5707495A (en) * 1990-06-20 1998-01-13 J.M. Voith Gmbh Headbox for papermaking machine with more uniform flow
DE4019593C2 (en) 1990-06-20 1994-01-20 Voith Gmbh J M Headbox for paper machines
FI122820B (en) * 2004-04-30 2012-07-13 Vaahto Oy Device for controlling medium flow
CN101392471B (en) * 2008-10-23 2011-09-07 华南理工大学 Dilution water ring addition device of head box

Also Published As

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

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