EP2298970A2 - Workstation of an open end rotor spinning machine and procedure for operating the workstation - Google Patents

Workstation of an open end rotor spinning machine and procedure for operating the workstation Download PDF

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Publication number
EP2298970A2
EP2298970A2 EP10005341A EP10005341A EP2298970A2 EP 2298970 A2 EP2298970 A2 EP 2298970A2 EP 10005341 A EP10005341 A EP 10005341A EP 10005341 A EP10005341 A EP 10005341A EP 2298970 A2 EP2298970 A2 EP 2298970A2
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EP
European Patent Office
Prior art keywords
thread
supply voltage
failure
yarn
workstation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP10005341A
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German (de)
French (fr)
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EP2298970B1 (en
EP2298970A3 (en
Inventor
Dirk Brakensiek
Jürgen Meyer
Heinz-Georg Wassenhoven
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.)
Saurer Spinning Solutions GmbH and Co KG
Original Assignee
Oerlikon Textile GmbH and Co KG
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Publication of EP2298970A2 publication Critical patent/EP2298970A2/en
Publication of EP2298970A3 publication Critical patent/EP2298970A3/en
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Publication of EP2298970B1 publication Critical patent/EP2298970B1/en
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/04—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by contact of fibres with a running surface
    • D01H4/08—Rotor spinning, i.e. the running surface being provided by a rotor
    • D01H4/12—Rotor bearings; Arrangements for driving or stopping
    • D01H4/14—Rotor driven by an electric motor
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/42—Control of driving or stopping
    • D01H4/44—Control of driving or stopping in rotor spinning

Definitions

  • the invention relates to a workstation of an open-end rotor spinning machine with a spinning rotor for spinning a thread, with an electric motor for driving the spinning rotor and a power supply for providing a supply voltage, wherein the electric motor is operated in case of failure of the supply voltage as a generator to its control means and its storage to be supplied with electrical energy, wherein the workstation has at least one electric drive of a winding roller for driving a yarn package on which the spun yarn is wound, and an electrical control device of a thread withdrawal device for removing the yarn from the spinning rotor. Furthermore, the invention relates to a method for operating the job.
  • Open-end rotor spinning machines have long been known in the art.
  • a job is the open-end rotor spinning a sliver fed.
  • the sliver is first disintegrated into individual fibers and conveyed by a stream of air into a very fast rotating drum with an inwardly inclined wall - the spinning rotor - which has a speed of up to 150,000 rpm.
  • the fibers slip into the groove at the foot of the spinning wall of the spinning rotor. There they are collected until the yarn thickness is reached and are drawn off axially through the nozzle in the axis of rotation and thus twisted into a yarn.
  • the withdrawn yarn is then spooled onto a cheese.
  • the DE 10 2005 035 055 A1 discloses an electric motor for driving a spinning rotor of a work station of an open-end rotor spinning machine.
  • the electric motor is magnetic and thus mounted without contact in order to rule out high frictional losses at the high speeds occurring.
  • an automatic switchover of the electric motor takes place in the generator mode. This ensures the maintenance of the control device of the motor circuit and in particular of the magnetic bearing. In this way, damage to the rotor is prevented by an abrupt failure of the magnetic bearing in the event of a power failure.
  • the stored kinetic energy of the spinning rotor is limited, so that during the generator operation, the rotational speed of the rotor continuously decreases, which has a decrease in the power generated by the electric motor in the generator operation result. This results in that the magnetic bearing function and the operation of the control device are no longer guaranteed when passing a limit of the generated power of the electric motor. Therefore, the motor is discontinued when falling below the limit in the emergency bearing and completely braked by shorting the motor windings.
  • the kinetic energy stored in the spinning rotor is limited. Therefore, only the control device of the rotor motor and its magnetic bearing are supplied in case of failure of the supply voltage with electrical energy. A supply of other electrical consumers of the job of the open-end rotor spinning machine does not take place. Also here is in the foreground in case of failure of the supply voltage to avert damage from the rotor spinning machine. The recommissioning after such a supply voltage failure is not considered.
  • a circuit arrangement is formed, in case of failure of the supply voltage of the power supply, the electrical energy of the operated as a generator electric motor for driving the spinning rotor to supply at least the electric drive of the winding roller and the electrical control device of the thread take-off device and to decouple other unneeded electrical consumers of the workplace from the electrical power supply.
  • the solution according to the invention takes account of the facts of the limited available energy and, on the other hand, makes it possible to remove the thread from the work station since only the relevant drives or control devices are supplied with voltage.
  • the sliver feed is stopped immediately with the supply failure.
  • the spinning rotor is running as known in the art. So no thread is spun anymore. Only the remaining thread should be removed from the workstation.
  • the inventive work control means are adapted to maintain the operation of the thread take-off device and the rotation of the winding roller in case of failure of the supply voltage until the yarn is wound on the yarn package.
  • the operation of the thread take-off and the winding roller is continued analogously to the normal operation at regular voltage.
  • the continued operation of the thread take-off device is of importance, since the thread take-off is driven by rotor motors of today's design usually by stepper motors, which block immediately at a supply voltage failure.
  • the winding roller or the bobbin stores similar to the spinning rotor, albeit to a lesser extent, kinetic energy, so that they initially continue to rotate. For this reason, a thread break would occur immediately without the inventive solution and a residual thread remain in the workstation.
  • the energy requirement of the solution according to the invention is low.
  • the winding roller can cover its energy needs at least partially from its own kinetic energy.
  • the thread take-off or the driving stepper motor is designed anyway only for a low drive torque.
  • the thread withdrawal device includes a thread clamping device and control means are adapted to open in case of failure of the supply voltage, the thread clamping device and to maintain the rotation of the winding roller until the thread is wound on the yarn package.
  • control means are adapted to open in case of failure of the supply voltage, the thread clamping device and to maintain the rotation of the winding roller until the thread is wound on the yarn package.
  • the workstation has a yarn laying device and the circuit arrangement is additionally designed to supply the electric energy of the electric motor operated as a generator for driving the spinning rotor of the yarn guide device in case of failure of the supply voltage of the power supply to position the yarn laying device in a central position.
  • the thread is also stored in the middle of the yarn package and thus easier to find for Wiederanspinnen after Vorsorgungstapswiederpour.
  • control means are adapted to control in case of failure of the supply voltage of the power supply, the voltage provided by means of the electric motor for driving the spinning rotor voltage.
  • a sensor is provided for this, which measures the supply voltage.
  • the control means can regulate the electric motor so that the voltage provided is barely sufficient to supply the winding roller drive and the thread take-off. In this way, the kinetic energy of the rotor is optimally utilized.
  • the sensor is positioned so that both the supply voltage and the voltage provided by the motor can be measured.
  • a method for operating a job of an open-end rotor spinning machine with a spinning rotor for spinning a thread, with an electric motor for driving the spinning rotor and a power supply for providing a supply voltage, wherein the electric motor in case of failure of the supply voltage as a generator is proposed, wherein an electric drive rotates a winding roller for driving a yarn package on which the spun yarn is wound, and a yarn withdrawal device for removing the yarn from the spinning rotor is driven by an electrical control device, wherein in case of failure of the supply voltage of the power supply the electrical energy of the electric motor operated as a generator for driving the spinning rotor is supplied to at least the electric drive of the winding roller and the electrical control device of the thread take-off device and other unnecessary electrical Ver consumers are decoupled from the electrical power supply.
  • the operation of the thread withdrawal device and the rotation of the winding roller are maintained until the thread has been wound onto the yarn package.
  • the thread withdrawal device releases the thread in the event of failure of the supply voltage, for this purpose a thread clamping device is opened and the rotation of the winding roller is maintained until the thread is wound onto the yarn package.
  • electrical energy of the electric motor operated as a generator for driving the spinning rotor is advantageously fed to a yarn laying device in order to convert the yarn laying device into a center position.
  • the voltage provided by means of the electric motor for driving the spinning rotor is regulated.
  • FIG. 1 is a job of a per se known open-end rotor spinning machine 1 shown.
  • Such open-end rotor spinning machines 1 have a multiplicity of identical workstations 2 arranged next to one another in series, each equipped with a spinning device 3 and a winding device 4.
  • the spinning devices 3 the sliver 6 presented in spinning cans 5 is spun into a thread 7 by means of a spinning rotor 10, which are wound onto bobbins 8 on the winding devices 4.
  • An opening roller 15 prepares the sliver 6, which is the spinning device 3 is supplied.
  • the spinning device 3 in this case has a spinning rotor 10, which is driven by a rotor drive 20.
  • the thread withdrawal device 16 pulls the finished spun yarn 7 from the spinning rotor 10 or from the spinning device 3 from.
  • the thread withdrawal device 16 has two rollers 17 and 18.
  • the roller 17 is driven by a stepper motor.
  • the pressure roller 18 is pressed by means of an adjusting device against the roller 17, so that the two rollers 17 and 18 form a thread clamping device.
  • the stepping motor and the adjusting device are part of the electrical control device 16a of the thread withdrawal device 16.
  • the electrical control device 16a has control means 16b.
  • the workstations 2 each have a yarn laying device 19, which supplies the yarn 7 to the yarn package 8 in an alternating manner.
  • the winding means 4 are each provided with a creel 9 for rotatably holding a yarn package 8 and a winding roll 11 for rotating the yarn package 8.
  • the Winding roller 11 is driven by an electric drive 11a, the drive having a motor and control means 11b.
  • a workstation own suction nozzle 14 is present. This is pivotally mounted and is pivoted at a yarn break in the direction of the yarn package to detect the yarn end on the yarn package 8.
  • a circuit arrangement 60 of an inventive workstation of an open-end rotor spinning machine is in Fig.2 shown.
  • a DC power supply 22 provides the supply voltage for a rotor drive 20, which drives the spinning rotor 10 as part of the spinning device 3.
  • To the power supply 22 more electrical loads 21 and 32 are connected.
  • the electrical consumers 32 are connected directly to the power supply unit 22 and according to the invention are formed by the electric drive 11a of the winding roller 11 and by the electrical control device 16a of the thread withdrawal device 16.
  • the thread laying device 19 may also belong.
  • the other electrical loads 21 are not connected directly to the power supply, but there is a switch between the power supply and the consumers 21.
  • the switch is formed in the illustrated embodiment as a field effect transistor 30.
  • the rotor drive has a voltage detection 31, which drives the field effect transistor 30. As long as the supply voltage of the power supply 22 is within an allowable tolerance range, the field effect transistor 30 is conductive.
  • the voltage detection 31 monitors the supply voltage and controls the field effect transistor accordingly. Only if the supply voltage is below a permissible limit Value drops, locks the field effect transistor 30 and disconnects the load 21 from the power supply.
  • the rotor drive further has a rotor motor 24 and a power electronic circuit 23.
  • the power electronic circuit 23 consists of a controlled by pulse width modulation buck converter 25 and an inverter 26.
  • the buck converter 25 has an active power amplifier and is thus capable of regenerative.
  • the inverter 26 operates in block mode.
  • the nodes 41 and 40 form the voltage input of the power electronic circuit 23 and the buck converter 25.
  • the voltage output of the buck converter which is formed by the nodes 42 and 40, is connected to the voltage input of the inverter 26.
  • the inverter 26 only switches the output voltage of the buck converter 25 to the phases 43, 44 and 45 of the rotor motor 24.
  • the phases 43, 44 and 45 then form the voltage output of the power electronic circuit 23.
  • dargterrorism is also an inverter operated by means of pulse width modulation can be used.
  • the buck converter 25 is driven by the controller 27, which essentially performs a speed control.
  • the controller 27 at the terminals 50 and 51, the target speed and the actual speed are transferred.
  • the overvoltage sensor 28 and the undervoltage sensor 29 influence the controller 27. Both sensors 28 and 29 detect the voltage at the input of the electronic power circuit 23.
  • the undervoltage sensor 29 intervenes after a failure of the Supply voltage so in the controller 27, that sets a voltage that allows just a safe function of the load 32 and the control of the rotor drive and its magnetic bearing.
  • the overvoltage sensor 28 is not important in a supply voltage failure. It essentially serves to avoid an overvoltage when braking the rotor.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Abstract

The workstation (2) comprises a spinning rotor (10) for spinning threads (7), an electric motor for propelling the spinning rotor, and a power supply unit for supplying the supply voltage. The electric motor is operated as generator during failure of the supply voltage. An electric control unit (16a) is provided for inputting electrical energy to a thread take-off unit (16). An independent claim is also included for a method for operating a workstation.

Description

Die Erfindung betrifft eine Arbeitsstelle einer Offenend-Rotorspinnmaschine mit einem Spinnrotor zum Spinnen eines Fadens, mit einem elektrischen Motor zum Antreiben des Spinnrotors und einem Netzteil zur Bereitstellung einer Versorgungsspannung, wobei der elektrische Motor bei Ausfall der Versorgungsspannung als Generator betreibbar ist, um seine Steuermittel und seine Lagerung mit elektrischer Energie zu versorgen, wobei die Arbeitsstelle zumindest einen elektrischen Antrieb einer Wickelwalze zum Antreiben einer Garnspule, auf die der gesponnene Faden gewickelt wird, und eine elektrische Steuereinrichtung einer Fadenabzugseinrichtung zum Abziehen des Fadens aus dem Spinnrotor aufweist. Ferner betrifft die Erfindung ein Verfahren zum Betreiben der Arbeitsstelle.The invention relates to a workstation of an open-end rotor spinning machine with a spinning rotor for spinning a thread, with an electric motor for driving the spinning rotor and a power supply for providing a supply voltage, wherein the electric motor is operated in case of failure of the supply voltage as a generator to its control means and its storage to be supplied with electrical energy, wherein the workstation has at least one electric drive of a winding roller for driving a yarn package on which the spun yarn is wound, and an electrical control device of a thread withdrawal device for removing the yarn from the spinning rotor. Furthermore, the invention relates to a method for operating the job.

Offenend-Rotorspinnmaschinen sind im Stand der Technik seit langem bekannt. Hierbei wird einer Arbeitsstelle der Offenend-Rotorspinnmaschinen ein Faserband zugeführt. Das Faserband wird zuerst in einzelne Fasern aufgelöst und von einem Luftstrom in eine sehr schnell drehende Trommel mit nach innen geneigter Wand - den Spinnrotor - befördert, dessen Drehzahl bis zu 150.000 U/min beträgt. Durch die Beschleunigung rutschen die Fasern in die Rille am Fuß der Rutschwand des Spinnrotors. Dort werden sie gesammelt, bis die Garnstärke erreicht ist und werden axial durch die Düse in der Drehachse abgezogen und damit zu einem Garn verdreht. Das abgezogene Garn wird dann auf eine Kreuzspule gespult.Open-end rotor spinning machines have long been known in the art. Here, a job is the open-end rotor spinning a sliver fed. The sliver is first disintegrated into individual fibers and conveyed by a stream of air into a very fast rotating drum with an inwardly inclined wall - the spinning rotor - which has a speed of up to 150,000 rpm. As a result of the acceleration, the fibers slip into the groove at the foot of the spinning wall of the spinning rotor. There they are collected until the yarn thickness is reached and are drawn off axially through the nozzle in the axis of rotation and thus twisted into a yarn. The withdrawn yarn is then spooled onto a cheese.

Die DE 10 2005 035 055 A1 offenbart einen elektrischen Motor zum Antreiben eines Spinnrotors einer Arbeitstelle einer Offenend-Rotorspinnmaschine. Der elektrische Motor ist magnetisch und damit berührungslos gelagert, um bei den hohen auftretenden Drehzahlen hohe Reibungsverluste auszuschließen. Bei einem Ausfall der Versorgungsspannung findet eine automatische Umschaltung des elektrischen Motors in den Generatorbetrieb statt. Dadurch wird die Aufrechterhaltung der Steuerungsvorrichtung der Motorschaltung und insbesondere der magnetischen Lagerung gewährleistet. Auf diese Weise wird eine Schädigung des Rotors durch einen abrupten Ausfall der magnetischen Lagerung bei einem Ausfall der Versorgungsspannung verhindert. Die gespeicherte kinetische Energie des Spinnrotors ist begrenzt, so dass während des Generatorbetriebes die Drehzahl des Rotors kontinuierlich absinkt, was ein Absinken der von dem elektrischen Motor im Generatorbetrieb erzeugten Leistung zur Folge hat. Dies führt dazu, dass die Magnetlagerfunktion und der Betrieb der Steuerungsvorrichtung bei Passieren eines Grenzwertes der erzeugten Leistung des elektrischen Motors nicht mehr gewährleistet sind. Deshalb wird der Motor bei Unterschreiten des Grenzwertes im Notlauflager abgesetzt und durch Kurzschließen der Motorwicklungen vollständig abgebremst.The DE 10 2005 035 055 A1 discloses an electric motor for driving a spinning rotor of a work station of an open-end rotor spinning machine. The electric motor is magnetic and thus mounted without contact in order to rule out high frictional losses at the high speeds occurring. In case of failure of the supply voltage, an automatic switchover of the electric motor takes place in the generator mode. This ensures the maintenance of the control device of the motor circuit and in particular of the magnetic bearing. In this way, damage to the rotor is prevented by an abrupt failure of the magnetic bearing in the event of a power failure. The stored kinetic energy of the spinning rotor is limited, so that during the generator operation, the rotational speed of the rotor continuously decreases, which has a decrease in the power generated by the electric motor in the generator operation result. This results in that the magnetic bearing function and the operation of the control device are no longer guaranteed when passing a limit of the generated power of the electric motor. Therefore, the motor is discontinued when falling below the limit in the emergency bearing and completely braked by shorting the motor windings.

Wie oben bereits erläutert, ist die im Spinnrotor gespeicherte kinetische Energie begrenzt. Deshalb werden nur die Steuerungsvorrichtung des Rotormotors und seine magnetische Lagerung bei einem Ausfall der Versorgungsspannung mit elektrischer Energie versorgt. Eine Versorgung der anderen elektrischen Verbraucher der Arbeitsstelle der Offenend-Rotorspinnmaschine findet nicht statt. Auch steht hier im Vordergrund bei Ausfall der Versorgungsspannung, einen Schaden von der Rotorspinnmaschine abzuwenden. Die Wiederinbetriebnahme nach einem solchen Versorgungsspannungsausfall wird nicht betrachtet.As explained above, the kinetic energy stored in the spinning rotor is limited. Therefore, only the control device of the rotor motor and its magnetic bearing are supplied in case of failure of the supply voltage with electrical energy. A supply of other electrical consumers of the job of the open-end rotor spinning machine does not take place. Also here is in the foreground in case of failure of the supply voltage to avert damage from the rotor spinning machine. The recommissioning after such a supply voltage failure is not considered.

Wenn die Arbeitsstelle durch einen Ausfall der Versorgungsspannung abrupt in den Stillstand versetzt wird, bleibt eine durch einen Schrittmotor angetriebene Abzugseinheit sofort stehen. Dadurch verbleibt der gesponnene Faden in der Arbeitsstelle. Dieser Restfaden kann bei der Wiederinbetriebnahme nach Wiederkehr der Versorgungsspannung zu Problemen führen. Es ist besonders problematisch, wenn der Faden in dem Messschlitz eines elektronischen Fadensensors oder Fadenreinigers verbleibt, da bei der Initialisierung der Elektronik davon ausgegangen wird, dass der Messschlitz leer ist. Ein Fehler bei der Initialisierung führt dann entsprechend zu Fehlern bei den folgenden Messungen. Aber auch ein Restfaden, der sich um die Mechanik der Arbeitsstelle wickelt, kann bei der Wiederinbetriebnahme zu Problemen führen. Solche Restfäden müssen dann manuell entfernt werden. Vor dem Hintergrund der Vielzahl von Arbeitsstellen, die eine solche Offenend-Rotorspinnmaschine aufweist und in der Regel alle gleichzeitig von dem Versorgungsspannungsausfall betroffen sind, bedeutet eine solche Restfadenentfernung durch das Bedienpersonal einen erheblichen Aufwand.If the workstation is abruptly brought to a standstill by a power failure, a trigger unit driven by a stepper motor will stop immediately. As a result, the spun yarn remains in the workplace. This residual thread can lead to problems when restarting after the supply voltage returns. It is particularly problematic if the thread remains in the measuring slot of an electronic thread sensor or thread cleaner, since the initialization of the electronics assumes that the measuring slot is empty. An error during the initialization leads accordingly to errors in the following measurements. But also a residual thread, which wraps around the mechanics of the job, can lead to problems when restarting. Such residual threads must then be removed manually. Against the background of the large number of jobs, which has such an open-end rotor spinning machine and are generally all affected simultaneously by the supply voltage failure, such a residual thread removal by the operating personnel a considerable effort.

Es ist daher die Aufgabe der vorliegenden Erfindung, die Möglichkeiten einer automatisierten Wiederinbetriebnahme einer gattungsgemäßen Arbeitsstelle ohne zusätzlichen Aufwand zu verbessern.It is therefore the object of the present invention to improve the possibilities of an automated restart of a generic workstation without additional effort.

Die Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale der Arbeitsstelle nach Anspruch 1 sowie des Verfahrensanspruches 6 gelöst. Vorteilhafte Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche.The object is achieved by the characterizing features of the job according to claim 1 and the method claim 6. Advantageous developments of the invention are the subject of the dependent claims.

Zur Lösung der Aufgabe ist eine Schaltungsanordnung dazu ausgebildet, bei Ausfall der Versorgungsspannung des Netzteils die elektrische Energie des als Generator betriebenen elektrischen Motors zum Antreiben des Spinnrotors zumindest dem elektrischen Antrieb der Wickelwalze und der elektrischen Steuereinrichtung der Fadenabzugseinrichtung zuzuführen und andere nicht benötigte elektrische Verbraucher der Arbeitsstelle von der elektrischen Energiezufuhr zu entkoppeln.To solve the problem, a circuit arrangement is formed, in case of failure of the supply voltage of the power supply, the electrical energy of the operated as a generator electric motor for driving the spinning rotor to supply at least the electric drive of the winding roller and the electrical control device of the thread take-off device and to decouple other unneeded electrical consumers of the workplace from the electrical power supply.

Durch die erfindungsgemäße Lösung wird zum einen dem Sachverhalt der begrenzten zur Verfügung stehenden Energie Rechnung getragen und zum anderen ein Entfernen des Fadens aus der Arbeitstelle ermöglicht, da nur die relevanten Antriebe beziehungsweise Steuereinrichtungen weiter mit Spannung versorgt werden. Die Faserbandzufuhr wird mit dem Vorsorgungsausfall sofort gestoppt. Der Spinnrotor läuft, wie im Stand der Technik bekannt, aus. Es wird also kein Faden mehr gesponnen. Es soll nur der Restfaden aus der Arbeitstelle entfernt werden.The solution according to the invention, on the one hand, takes account of the facts of the limited available energy and, on the other hand, makes it possible to remove the thread from the work station since only the relevant drives or control devices are supplied with voltage. The sliver feed is stopped immediately with the supply failure. The spinning rotor is running as known in the art. So no thread is spun anymore. Only the remaining thread should be removed from the workstation.

Gemäß einer bevorzugten Ausführungsform der erfindungsgemäßen Arbeitsstelle sind Steuermittel dazu ausgebildet, bei einem Ausfall der Versorgungsspannung den Betrieb der Fadenabzugseinrichtung und die Rotation der Wickelwalze aufrechtzuerhalten, bis der Faden auf die Garnspule aufgewunden ist. Gemäß dieser Ausführungsvariante wird also der Betrieb des Fadenabzugs und der Wickelwalze analog dem Normalbetrieb bei regulärer Spannung fortgesetzt. Insbesondere der Weiterbetrieb der Fadenabzugseinrichtung ist von Bedeutung, da der Fadenabzug bei Rotorspinnmaschinen heutiger Bauart in der Regel von Schrittmotoren angetrieben wird, die bei einem Versorgungsspannungsausfall sofort blockieren. Die Wickelwalze beziehungsweise die Garnspule dagegen speichert ähnlich wie der Spinnrotor, wenn auch in geringerem Umfang, kinetische Energie, so dass diese zunächst weiter rotieren. Aus diesem Grunde würde ohne die erfindungsgemäße Lösung sofort ein Fadenbruch auftreten und ein Restfaden in der Arbeitstelle verbleiben. Der Energiebedarf der erfindungsgemäßen Lösung ist gering.According to a preferred embodiment of the inventive work control means are adapted to maintain the operation of the thread take-off device and the rotation of the winding roller in case of failure of the supply voltage until the yarn is wound on the yarn package. According to this embodiment, therefore, the operation of the thread take-off and the winding roller is continued analogously to the normal operation at regular voltage. In particular, the continued operation of the thread take-off device is of importance, since the thread take-off is driven by rotor motors of today's design usually by stepper motors, which block immediately at a supply voltage failure. The winding roller or the bobbin, in contrast, stores similar to the spinning rotor, albeit to a lesser extent, kinetic energy, so that they initially continue to rotate. For this reason, a thread break would occur immediately without the inventive solution and a residual thread remain in the workstation. The energy requirement of the solution according to the invention is low.

Die Wickelwalze kann ihren Energiebedarf zumindest teilweise aus ihrer eigenen kinetischen Energie decken. Der Fadenabzug beziehungsweise der antreibende Schrittmotor ist ohnehin nur für ein geringes Antriebsmoment ausgelegt.The winding roller can cover its energy needs at least partially from its own kinetic energy. The thread take-off or the driving stepper motor is designed anyway only for a low drive torque.

Gemäß einer weiteren bevorzugten Ausführungsform der erfindungsgemäßen Arbeitsstelle beinhaltet die Fadenabzugseinrichtung eine Fadenklemmvorrichtung und Steuermittel sind dazu ausgebildet, bei einem Ausfall der Versorgungsspannung die Fadenklemmvorrichtung zu öffnen und die Rotation der Wickelwalze aufrechtzuerhalten, bis der Faden auf die Garnspule aufgewunden ist. Durch diese Variante der erfindungsgemäßen Lösung kann der Energiebedarf noch reduziert werden, da der Antrieb der Fadenabzugseinrichtung nicht weiter betrieben werden muss, sondern nur ein kurzer Energieimpuls zum Öffnen der Fadenklemme erforderlich ist und der Faden dann alleine durch die Rotation der Wickelwalze aufgewickelt wird.According to a further preferred embodiment of the work according to the invention, the thread withdrawal device includes a thread clamping device and control means are adapted to open in case of failure of the supply voltage, the thread clamping device and to maintain the rotation of the winding roller until the thread is wound on the yarn package. This variant of the solution according to the invention, the energy consumption can be reduced because the drive of the thread withdrawal device does not need to be operated, but only a short pulse of energy to open the thread clamp is required and the thread is then wound alone by the rotation of the winding roller.

Vorteilhafterweise weist die Arbeitstelle eine Fadenverlegeeinrichtung auf und die Schaltungsanordnung ist zusätzlich dazu ausgebildet, bei Ausfall der Versorgungsspannung des Netzteils die elektrische Energie des als Generator betriebenen elektrischen Motors zum Antreiben des Spinnrotors der Fadenführungseinrichtung zuzuführen, um die Fadenverlegeeinrichtung in einer Mittenstellung zu positionieren. Auf diese Weise wird der Faden auch in der Mitte der Garnspule abgelegt und damit zum Wiederanspinnen nach Vorsorgungsspannungswiederkehr leichter aufgefunden.Advantageously, the workstation has a yarn laying device and the circuit arrangement is additionally designed to supply the electric energy of the electric motor operated as a generator for driving the spinning rotor of the yarn guide device in case of failure of the supply voltage of the power supply to position the yarn laying device in a central position. In this way, the thread is also stored in the middle of the yarn package and thus easier to find for Wiederanspinnen after Vorsorgungsspannungswiederkehr.

Vorteilhafterweise sind Steuermittel dazu ausgebildet, bei einem Ausfall der Versorgungsspannung des Netzteils die mittels des elektrischen Motors zum Antreiben des Spinnrotors bereitgestellte Spannung zu regeln. Vorzugsweise ist dazu ein Sensor vorhanden, der die Versorgungsspannung misst. Auf diese Weise wird ein Versorgungsspannungsausfall erfasst und die Steuermittel können den elektrischen Motor so regeln, dass die bereitgestellte Spannung gerade noch ausreichend ist, um den Wickelwalzenantrieb und den Fadenabzug zu versorgen. Auf diese Weise wird die kinetische Energie des Rotors optimal ausgenutzt. Der Sensor ist dabei so positioniert, dass sowohl die Versorgungsspannung als auch die mittels des Motors bereitgestellte Spannung gemessen werden kann.Advantageously, control means are adapted to control in case of failure of the supply voltage of the power supply, the voltage provided by means of the electric motor for driving the spinning rotor voltage. Preferably, a sensor is provided for this, which measures the supply voltage. To this In this way, a supply voltage failure is detected and the control means can regulate the electric motor so that the voltage provided is barely sufficient to supply the winding roller drive and the thread take-off. In this way, the kinetic energy of the rotor is optimally utilized. The sensor is positioned so that both the supply voltage and the voltage provided by the motor can be measured.

Zur Lösung der Aufgabe wird ferner ein Verfahren zum Betreiben einer Arbeitsstelle einer Offenend-Rotorspinnmaschine mit einem Spinnrotor zum Spinnen eines Fadens, mit einem elektrischen Motor zum Antreiben des Spinnrotors und einem Netzteil zur Bereitstellung einer Versorgungsspannung, wobei der elektrische Motor bei Ausfall der Versorgungsspannung als Generator betrieben wird, vorgeschlagen, wobei ein elektrischer Antrieb eine Wickelwalze zum Antreiben einer Garnspule rotiert, auf die der gesponnene Faden gewickelt wird, und eine Fadenabzugseinrichtung zum Abziehen des Fadens aus dem Spinnrotor von einer elektrischen Steuereinrichtung angesteuert wird, wobei bei Ausfall der Versorgungsspannung des Netzteils die elektrische Energie des als Generator betriebenen elektrischen Motors zum Antreiben des Spinnrotors zumindest dem elektrischen Antrieb der Wickelwalze und der elektrischen Steuereinrichtung der Fadenabzugseinrichtung zugeführt wird und andere nicht benötigte elektrische Verbraucher der Arbeitsstelle von der elektrischen Energiezufuhr entkoppelt werden.To achieve the object, a method for operating a job of an open-end rotor spinning machine with a spinning rotor for spinning a thread, with an electric motor for driving the spinning rotor and a power supply for providing a supply voltage, wherein the electric motor in case of failure of the supply voltage as a generator is proposed, wherein an electric drive rotates a winding roller for driving a yarn package on which the spun yarn is wound, and a yarn withdrawal device for removing the yarn from the spinning rotor is driven by an electrical control device, wherein in case of failure of the supply voltage of the power supply the electrical energy of the electric motor operated as a generator for driving the spinning rotor is supplied to at least the electric drive of the winding roller and the electrical control device of the thread take-off device and other unnecessary electrical Ver consumers are decoupled from the electrical power supply.

Gemäß einer bevorzugten Ausführungsform des erfindungsgemäßen Verfahrens wird bei einem Ausfall der Versorgungsspannung der Betrieb der Fadenabzugseinrichtung und die Rotation der Wickelwalze aufrechterhalten, bis der Faden auf die Garnspule aufgewunden ist.According to a preferred embodiment of the method according to the invention, in the event of a failure of the supply voltage, the operation of the thread withdrawal device and the rotation of the winding roller are maintained until the thread has been wound onto the yarn package.

Gemäß einer weiteren bevorzugten Ausführungsform des erfindungsgemäßen Verfahrens gibt die Fadenabzugseinrichtung bei einem Ausfall der Versorgungsspannung den Faden frei, dazu wird eine Fadenklemmvorrichtung geöffnet und die Rotation der Wickelwalze wird aufrechterhalten, bis der Faden auf die Garnspule aufgewunden ist.According to a further preferred embodiment of the method according to the invention, the thread withdrawal device releases the thread in the event of failure of the supply voltage, for this purpose a thread clamping device is opened and the rotation of the winding roller is maintained until the thread is wound onto the yarn package.

Vorteilhafterweise wird bei Ausfall der Versorgungsspannung des Netzteils elektrische Energie des als Generator betriebenen elektrischen Motors zum Antreiben des Spinnrotors einer Fadenverlegeeinrichtung zugeführt, um die Fadenverlegeeinrichtung in eine Mittenstellung zu überführen.In case of failure of the supply voltage of the power supply, electrical energy of the electric motor operated as a generator for driving the spinning rotor is advantageously fed to a yarn laying device in order to convert the yarn laying device into a center position.

Vorteilhafterweise wird bei einem Ausfall der Versorgungsspannung des Netzteils die mittels des elektrischen Motors zum Antreiben des Spinnrotors bereitgestellte Spannung geregelt.Advantageously, in case of failure of the supply voltage of the power supply, the voltage provided by means of the electric motor for driving the spinning rotor is regulated.

Die Erfindung wird nachfolgend anhand eines in den Zeichnungen dargestellten Ausführungsbeispiels näher erläutert.The invention will be explained in more detail with reference to an embodiment shown in the drawings.

Es zeigen:

Fig. 1
schematisch in Seitenansicht eine erfindungsgemäße Arbeitsstelle einer Offenend-Rotorspinnmaschine;
Fig. 2
eine Schaltungsanordnung einer erfindungsgemäßen Arbeitsstelle mit einem als Generator betreibaren elektrischen Motor zum Antreiben eines Spinnrotors.
Show it:
Fig. 1
schematically a side view of a work according to the invention an open-end rotor spinning machine;
Fig. 2
a circuit arrangement of a workstation according to the invention with an operable as a generator electric motor for driving a spinning rotor.

In Fig. 1 ist eine Arbeitsstelle einer an sich bekannten Offenend-Rotorspinnmaschine 1 dargestellt. Derartige Offenend-Rotorspinnmaschinen 1 weisen eine Vielzahl von in Reihe nebeneinander angeordneten, identischen Arbeitsstellen 2 auf, die jeweils mit einer Spinnvorrichtung 3 sowie einer Spuleinrichtung 4 ausgerüstet sind. In den Spinnvorrichtungen 3 wird mittels eines Spinnrotors 10 das in Spinnkannen 5 vorgelegte Faserband 6 zu einem Faden 7 gesponnen, die auf den Spuleinrichtungen 4 zu Garnspulen 8 aufgewickelt werden.In Fig. 1 is a job of a per se known open-end rotor spinning machine 1 shown. Such open-end rotor spinning machines 1 have a multiplicity of identical workstations 2 arranged next to one another in series, each equipped with a spinning device 3 and a winding device 4. In the spinning devices 3, the sliver 6 presented in spinning cans 5 is spun into a thread 7 by means of a spinning rotor 10, which are wound onto bobbins 8 on the winding devices 4.

Eine Auflösewalze 15 bereitet das Faserband 6 vor, welches der Spinnvorrichtung 3 zugeführt wird. Die Spinnvorrichtung 3 weist dabei einen Spinnrotor 10 auf, der von einem Rotorantrieb 20 angetrieben wird.An opening roller 15 prepares the sliver 6, which is the spinning device 3 is supplied. The spinning device 3 in this case has a spinning rotor 10, which is driven by a rotor drive 20.

Die Fadenabzugseinrichtung 16 zieht den fertig gesponnen Faden 7 aus dem Spinnrotor 10 beziehungsweise aus der Spinnvorrichtung 3 ab. Die Fadenabzugseinrichtung 16 weist zwei Rollen 17 und 18 auf. Die Rolle 17 wird von einem Schrittmotor angetrieben. Die Andrückrolle 18 wird mittels einer Verstelleinrichtung gegen die Rolle 17 gedrückt, so dass die beiden Rollen 17 und 18 eine Fadenklemmvorrichtung bilden. Wenn die Rolle 17 von dem Schrittmotor angetrieben wird, nimmt sie die Rolle 18 mit, so dass der Faden 7, der zwischen den Rollen 17, 18 eingeklemmt ist, weitertransportiert und aus dem Spinnrotor 10 abgezogen wird. Der Schrittmotor und die Verstelleinrichtung sind Bestandteil der elektrischen Steuereinrichtung 16a der Fadenabzugseinrichtung 16. Zur Ansteuerung des Schrittmotors und der Verstelleinrichtung weist die elektrische Steuereinrichtung 16a Steuermittel 16b auf.The thread withdrawal device 16 pulls the finished spun yarn 7 from the spinning rotor 10 or from the spinning device 3 from. The thread withdrawal device 16 has two rollers 17 and 18. The roller 17 is driven by a stepper motor. The pressure roller 18 is pressed by means of an adjusting device against the roller 17, so that the two rollers 17 and 18 form a thread clamping device. When the roller 17 is driven by the stepper motor, it takes the roller 18 with it, so that the thread 7, which is clamped between the rollers 17, 18, further transported and withdrawn from the spinning rotor 10. The stepping motor and the adjusting device are part of the electrical control device 16a of the thread withdrawal device 16. For controlling the stepping motor and the adjusting device, the electrical control device 16a has control means 16b.

Des Weiteren verfügen die Arbeitsstellen 2 jeweils über eine Fadenverlegeeinrichtung 19, die den Faden 7 changierend der Garnspule 8 zuführt.Furthermore, the workstations 2 each have a yarn laying device 19, which supplies the yarn 7 to the yarn package 8 in an alternating manner.

Wie angedeutet, sind die Spuleinrichtungen 4 jeweils mit einem Spulenrahmen 9 zum drehbaren Halten einer Garnspule 8 und einer Wickelwalze 11 zum Rotieren der Garnspule 8 ausgestattet. Die Wickelwalze 11 wird von einem elektrischen Antrieb 11a angetrieben, wobei der Antrieb einen Motor und Steuermittel 11b aufweist.As indicated, the winding means 4 are each provided with a creel 9 for rotatably holding a yarn package 8 and a winding roll 11 for rotating the yarn package 8. The Winding roller 11 is driven by an electric drive 11a, the drive having a motor and control means 11b.

Weiter ist eine arbeitsstelleneigene Saugdüse 14 vorhanden. Diese ist schwenkbar gelagert und wird bei einer Fadenunterbrechung in Richtung der Garnspule geschwenkt, um das Fadenende auf der Garnspule 8 zu erfassen.Next, a workstation own suction nozzle 14 is present. This is pivotally mounted and is pivoted at a yarn break in the direction of the yarn package to detect the yarn end on the yarn package 8.

Eine Schaltungsanordnung 60 einer erfindungsgemäßen Arbeitsstelle einer Offenend-Rotorspinnmaschine ist in Fig.2 dargestellt. Ein Gleichspannungsnetzteil 22 liefert die Speisespannung für einen Rotorantrieb 20, der als Bestandteil der Spinnvorrichtung 3 den Spinnrotor 10 antreibt. An das Netzteil 22 sind weitere elektrische Verbraucher 21 und 32 angeschlossen. Die elektrischen Verbraucher 32 sind direkt an das Netzteil 22 angeschlossen und werden erfindungsgemäß von dem elektrischen Antrieb 11a der Wickelwalze 11 und von der elektrischen Steuereinrichtung 16a der Fadenabzugseinrichtung 16 gebildet. Je nach Ausführungsform kann auch die Fadenverlegeeinrichtung 19 dazugehören. Die anderen elektrischen Verbraucher 21 sind nicht direkt an das Netzteil angeschlossen, sondern es ist zwischen dem Netzteil und den Verbrauchern 21 ein Schalter angeordnet. Der Schalter ist im dargestellten Ausführungsbeispiel als Feldeffekttransistor 30 ausgebildet.A circuit arrangement 60 of an inventive workstation of an open-end rotor spinning machine is in Fig.2 shown. A DC power supply 22 provides the supply voltage for a rotor drive 20, which drives the spinning rotor 10 as part of the spinning device 3. To the power supply 22 more electrical loads 21 and 32 are connected. The electrical consumers 32 are connected directly to the power supply unit 22 and according to the invention are formed by the electric drive 11a of the winding roller 11 and by the electrical control device 16a of the thread withdrawal device 16. Depending on the embodiment, the thread laying device 19 may also belong. The other electrical loads 21 are not connected directly to the power supply, but there is a switch between the power supply and the consumers 21. The switch is formed in the illustrated embodiment as a field effect transistor 30.

Der Rotorantrieb weist eine Spannungserkennung 31 auf, die den Feldeffekttransistor 30 ansteuert. Solange sich die Speisespannung des Netzteils 22 innerhalb eines zulässigen Toleranzbereiches bewegt, ist der Feldeffekttransistor 30 leitend. Die Spannungserkennung 31 überwacht dabei die Speisespannung und steuert den Feldeffekttransistor entsprechend an. Nur wenn die Speisespannung unterhalb eines zulässigen Wertes sinkt, sperrt der Feldeffekttransistor 30 und koppelt die Verbraucher 21 von der Energiezufuhr ab.The rotor drive has a voltage detection 31, which drives the field effect transistor 30. As long as the supply voltage of the power supply 22 is within an allowable tolerance range, the field effect transistor 30 is conductive. The voltage detection 31 monitors the supply voltage and controls the field effect transistor accordingly. Only if the supply voltage is below a permissible limit Value drops, locks the field effect transistor 30 and disconnects the load 21 from the power supply.

Der Rotorantrieb weist weiter einen Rotormotor 24 und eine leistungselektronische Schaltung 23 auf. In dem dargestellten Ausführungsbeispiel besteht die leistungselektronische Schaltung 23 aus einem mittels Pulsweitenmodulation gesteuerten Tiefsetzsteller 25 und einem Wechselrichter 26. Der Tiefsetzsteller 25 besitzt eine aktive Endstufe und ist damit rückspeisefähig. Der Wechselrichter 26 arbeitet im Blockbetrieb.The rotor drive further has a rotor motor 24 and a power electronic circuit 23. In the illustrated embodiment, the power electronic circuit 23 consists of a controlled by pulse width modulation buck converter 25 and an inverter 26. The buck converter 25 has an active power amplifier and is thus capable of regenerative. The inverter 26 operates in block mode.

Die Knoten 41 und 40 bilden den Spannungseingang der leistungselektronischen Schaltung 23 und des Tiefsetzstellers 25. Der Spannungsausgang des Tiefsetzstellers, der durch die Knoten 42 und 40 gebildet wird, ist mit dem Spannungseingang des Wechselrichters 26 verbunden. Der Wechselrichter 26 schaltet lediglich die Ausgangsspannung des Tiefsetzstellers 25 auf die Phasen 43, 44 und 45 des Rotormotors 24. Die Phasen 43, 44 und 45 bilden dann den Spannungsausgang der leistungselektronischen Schaltung 23.The nodes 41 and 40 form the voltage input of the power electronic circuit 23 and the buck converter 25. The voltage output of the buck converter, which is formed by the nodes 42 and 40, is connected to the voltage input of the inverter 26. The inverter 26 only switches the output voltage of the buck converter 25 to the phases 43, 44 and 45 of the rotor motor 24. The phases 43, 44 and 45 then form the voltage output of the power electronic circuit 23.

Alternativ zu der leistungselektronischen Schaltung 23, wie sie in Fig. 2 dargstellt ist, kann auch ein mittels Pulsweitenmodulation betriebener Wechselrichter verwendet werden.Alternatively to the electronic power circuit 23, as shown in FIG Fig. 2 dargstellt is also an inverter operated by means of pulse width modulation can be used.

Der Tiefsetzsteller 25 wird durch den Regler 27 angesteuert, der im Wesentlichen eine Drehzahlregelung durchführt. Dazu werden dem Regler 27 an den Anschlüssen 50 und 51 die Solldrehzahl und die Istdrehzahl übergeben. Ferner beeinflussen der Überspannungssensor 28 und der Unterspannungssensor 29 den Regler 27. Beide Sensoren 28 und 29 erfassen die Spannung am Eingang der leistungselektronischen Schaltung 23. Der Unterspannungssensor 29 greift nach einem Ausfall der Versorgungsspannung so in den Regler 27 ein, dass sich eine Spannung einstellt, die gerade noch eine sichere Funktion der Verbraucher 32 und der Steuerung des Rotorantriebes und seiner magnetischen Lagerung ermöglicht. Der Überspannungssensor 28 ist bei einem Versorgungsspannungsausfall nicht von Bedeutung. Er dient im Wesentlichen dazu, bei der Bremsung des Rotors eine Überspannung zu vermeiden.The buck converter 25 is driven by the controller 27, which essentially performs a speed control. For this purpose, the controller 27 at the terminals 50 and 51, the target speed and the actual speed are transferred. Furthermore, the overvoltage sensor 28 and the undervoltage sensor 29 influence the controller 27. Both sensors 28 and 29 detect the voltage at the input of the electronic power circuit 23. The undervoltage sensor 29 intervenes after a failure of the Supply voltage so in the controller 27, that sets a voltage that allows just a safe function of the load 32 and the control of the rotor drive and its magnetic bearing. The overvoltage sensor 28 is not important in a supply voltage failure. It essentially serves to avoid an overvoltage when braking the rotor.

Bei einem Ausfall der Versorgungsspannung wird dies von der Spannungserkennung 31 detektiert und die nicht benötigten Verbraucher 21 werden mittels des Feldeffekttransistors 30 vom Netzteil 22 und dem Rotorantrieb 20 getrennt. Der Rotorantrieb 20 geht in den Generatorbetrieb über und der Unterspannungssensor 29 regelt die Spannung wie oben beschrieben. Der elektrische Antrieb 11a der Wickelwalze 11 und die elektrische Steuereinrichtung 16a der Fadenabzugseinrichtung werden von dem Rotorantrieb 20 weiter mit Spannung versorgt. Die Rotation der Wickelwalze 11 wird solange aufrechterhalten, bis der Faden 7 aus der Arbeitsstelle 2 entfernt ist. Für die Fadenabzugseinrichtung gibt es zwei Möglichkeiten. Entweder transportiert sie den Faden 7 und zieht den Restfaden aus dem Spinnrotor 10 und der Arbeitsstelle 2 ab, oder die Andrückrolle 18 wird von der angetriebenen Rolle 17 abgehoben. Der Schrittmotor der Rolle 17 kann dann seinen Betrieb einstellen.In the event of a failure of the supply voltage, this is detected by the voltage detection 31 and the unneeded loads 21 are disconnected from the power supply 22 and the rotor drive 20 by means of the field effect transistor 30. The rotor drive 20 goes into the generator mode and the undervoltage sensor 29 regulates the voltage as described above. The electric drive 11a of the winding roller 11 and the electrical control device 16a of the thread take-off device are further supplied with voltage by the rotor drive 20. The rotation of the winding roller 11 is maintained until the thread 7 is removed from the job 2. There are two options for the thread withdrawal device. It either transports the thread 7 and pulls the remaining thread from the spinning rotor 10 and the job 2 from, or the pressure roller 18 is lifted from the driven roller 17. The stepper motor of the roller 17 can then stop its operation.

Claims (10)

Arbeitsstelle (2) einer Offenend-Rotorspinnmaschine (1) mit einem Spinnrotor (10) zum Spinnen eines Fadens (7), mit einem elektrischen Motor (24) zum Antreiben des Spinnrotors (10) und einem Netzteil (22) zur Bereitstellung einer Versorgungsspannung, wobei der elektrische Motor (24) bei Ausfall der Versorgungsspannung als Generator betreibbar ist, um seine Steuermittel und seine Lagerung mit elektrischer Energie zu versorgen, wobei die Arbeitsstelle (2) zumindest einen elektrischen Antrieb (11a) einer Wickelwalze (11) zum Antreiben einer Garnspule (8), auf die der gesponnene Faden (7) gewickelt wird, und eine elektrische Steuereinrichtung (16a) einer Fadenabzugseinrichtung (16) zum Abziehen des Fadens aus dem Spinnrotor (10) aufweist, dadurch gekennzeichnet, dass eine Schaltungsanordnung (60) dazu ausgebildet ist, bei Ausfall der Versorgungsspannung des Netzteils (22) die elektrische Energie des als Generator betriebenen elektrischen Motors (24) zum Antreiben des Spinnrotors (10) zumindest dem elektrischen Antrieb (11a) der Wickelwalze (11) und der elektrischen Steuereinrichtung (16a) der Fadenabzugseinrichtung (16) zuzuführen und andere nicht benötigte elektrische Verbraucher (21) der Arbeitsstelle (2) von der elektrischen Energiezufuhr zu entkoppeln.Working station (2) of an open-end rotor spinning machine (1) with a spinning rotor (10) for spinning a thread (7), with an electric motor (24) for driving the spinning rotor (10) and a power supply (22) for providing a supply voltage, wherein the electric motor (24) is operable as a generator in case of failure of the supply voltage to supply its control means and its storage with electrical energy, wherein the workstation (2) at least one electric drive (11a) of a winding roller (11) for driving a yarn package (8), on which the spun yarn (7) is wound, and an electric control device (16a) of a yarn withdrawal device (16) for removing the yarn from the spinning rotor (10), characterized in that a circuit arrangement (60) is formed is, in case of failure of the supply voltage of the power supply (22), the electrical energy of the electric motor operated as a generator (24) for driving the spinning rotor (10) at at least the electrical drive (11a) of the winding roller (11) and the electrical control device (16a) of the thread take-off device (16) and other unused electrical loads (21) to decouple the job (2) from the electrical power supply. Arbeitsstelle (2) nach Anspruch 1, dadurch gekennzeichnet, dass Steuermittel (11b, 16b, 23, 27, 29) dazu ausgebildet sind, bei einem Ausfall der Versorgungsspannung den Betrieb der Fadenabzugseinrichtung (16) und die Rotation der Wickelwalze (11) aufrechtzuerhalten, bis der Faden (7) auf die Garnspule (8) aufgewunden ist.Workstation (2) according to claim 1, characterized in that control means (11b, 16b, 23, 27, 29) are adapted to maintain the operation of the thread withdrawal device (16) and the rotation of the winding roller (11) in the event of a supply voltage failure, until the thread (7) is wound on the yarn package (8). Arbeitsstelle (2) nach Anspruch 1, dadurch gekennzeichnet, dass die Fadenabzugseinrichtung (16) eine Fadenklemmvorrichtung (17, 18) beinhaltet und dass Steuermittel (11b, 16b, 23, 27, 29) dazu ausgebildet sind, bei einem Ausfall der Versorgungsspannung die Fadenklemmvorrichtung (17, 18) zu öffnen und die Rotation der Wickelwalze (11) aufrechtzuerhalten, bis der Faden (7) auf die Garnspule (8) aufgewunden ist.Workstation (2) according to claim 1, characterized in that the thread withdrawal device (16) has a thread clamping device (17, 18) and that control means (11b, 16b, 23, 27, 29) are adapted to open in case of failure of the supply voltage, the thread clamping device (17, 18) and to maintain the rotation of the winding roller (11) until the Thread (7) is wound on the yarn package (8). Arbeitsstelle (2) nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet, dass die Arbeitstelle (2) eine Fadenverlegeeinrichtung (19) aufweist und die Schaltungsanordnung (60) zusätzlich dazu ausgebildet ist, bei Ausfall der Versorgungsspannung des Netzteils (22) die elektrische Energie des als Generator betriebenen elektrischen Motors (24) zum Antreiben des Spinnrotors (10) der Fadenverlegeeinrichtung (19) zuzuführen, um die Fadenverlegeeinrichtung (19) in einer Mittenstellung zu positionieren.Workstation (2) according to one of the preceding claims,
characterized in that the work station (2) has a yarn laying device (19) and the circuit arrangement (60) is additionally designed to, in the event of failure of the supply voltage of the power supply (22), the electrical energy of the electric motor operated as a generator (24) for driving the Spinning rotor (10) of the yarn laying device (19) to supply, in order to position the yarn laying device (19) in a central position. Arbeitsstelle (2) nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet, dass Steuermittel (23, 27, 29) dazu ausgebildet sind, bei einem Ausfall der Versorgungsspannung des Netzteils (22) die mittels des elektrischen Motors (24) zum Antreiben des Spinnrotors (10) bereitgestellte Spannung zu regeln.Workstation (2) according to one of the preceding claims,
characterized in that control means (23, 27, 29) are adapted to control in case of failure of the supply voltage of the power supply (22) by means of the electric motor (24) for driving the spinning rotor (10) provided voltage. Verfahren zum Betreiben einer Arbeitsstelle (2) einer Offenend-Rotorspinnmaschine (1) mit einem Spinnrotor (10) zum Spinnen eines Fadens (7), mit einem elektrischen Motor (24) zum Antreiben des Spinnrotors (10) und einem Netzteil (22) zur Bereitstellung einer Versorgungsspannung, wobei der elektrische Motor (24) bei Ausfall der Versorgungsspannung als Generator betrieben wird, um seine Steuermittel und seine Lagerung mit elektrischer Energie zu versorgen, wobei ein elektrischer Antrieb (11a) eine Wickelwalze (11) zum Antreiben einer Garnspule (8) rotiert, auf die der gesponnene Faden (7) gewickelt wird, und eine Fadenabzugseinrichtung (16) zum Abziehen des Fadens (7) aus dem Spinnrotor (10) von einer elektrischen Steuereinrichtung (16a) angesteuert wird, dadurch gekennzeichnet, dass bei Ausfall der Versorgungsspannung des Netzteils (22) die elektrische Energie des als Generator betriebenen elektrischen Motors (24) zum Antreiben des Spinnrotors (10) zumindest dem elektrischen Antrieb (11a) der Wickelwalze (11) und der elektrischen Steuereinrichtung (16a) der Fadenabzugseinrichtung (16) zugeführt wird und andere nicht benötigte elektrische Verbraucher (21) der Arbeitsstelle (2) von der elektrischen Energiezufuhr entkoppelt werden.Method for operating a workstation (2) of an open-end rotor spinning machine (1) with a spinning rotor (10) for spinning a thread (7), with an electric motor (24) for driving the spinning rotor (10) and a power supply (22) for Providing a supply voltage, wherein the electric motor (24) is operated as a generator in case of failure of the supply voltage to supply its control means and its storage with electrical energy, wherein an electric drive (11 a) a winding roller (11) for Driving a yarn package (8) rotates, on which the spun yarn (7) is wound, and a thread withdrawal device (16) for removing the thread (7) from the spinning rotor (10) by an electrical control device (16 a) is driven, characterized in that, if the supply voltage of the power supply unit (22) fails, the electrical energy of the electric motor (24) driving the spinning rotor (10) is at least the electric drive (11a) of the winding roller (11) and the electrical control device (16a) Thread withdrawal device (16) is supplied and other unnecessary electrical loads (21) of the workstation (2) are decoupled from the electrical power supply. Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass bei einem Ausfall der Versorgungsspannung der Betrieb der Fadenabzugseinrichtung (16) und die Rotation der Wickelwalze (11) aufrechterhalten wird, bis der Faden (7) auf die Garnspule (8) aufgewunden ist.A method according to claim 6, characterized in that in case of failure of the supply voltage, the operation of the thread take-off device (16) and the rotation of the winding roller (11) is maintained until the thread (7) is wound on the yarn package (8). Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass die Fadenabzugseinrichtung (16) bei einem Ausfall der Versorgungsspannung den Faden freigibt, dass dazu eine Fadenklemmvorrichtung (17, 18) geöffnet wird und dass die Rotation der Wickelwalze (11) aufrechterhalten wird, bis der Faden (7) auf die Garnspule (8) aufgewunden ist.A method according to claim 6, characterized in that the thread withdrawal device (16) releases the thread in the event of a failure of the supply voltage, that a thread clamping device (17, 18) is opened and that the rotation of the winding roller (11) is maintained until the thread ( 7) is wound on the yarn package (8). Verfahren nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, dass bei Ausfall der Versorgungsspannung des Netzteils (22) elektrische Energie des als Generator betriebenen elektrischen Motors (24) zum Antreiben des Spinnrotors (10) einer Fadenverlegeeinrichtung (19) zugeführt wird, um die Fadenverlegeeinrichtung (19) in eine Mittenstellung zu überführen.Method according to one of claims 6 to 8, characterized in that in case of failure of the supply voltage of the power supply (22) electrical energy of the electric motor operated as a generator (24) for driving the spinning rotor (10) of a yarn laying device (19) is supplied to the Yarn laying device (19) in a To transfer center position. Verfahren nach einem der Ansprüche 6 bis 9, dadurch gekennzeichnet, dass bei einem Ausfall der Versorgungsspannung des Netzteils (22) die mittels des elektrischen Motors (24) zum Antreiben des Spinnrotors (10) bereitgestellte Spannung geregelt wird.Method according to one of claims 6 to 9, characterized in that in case of failure of the supply voltage of the power supply unit (22) by means of the electric motor (24) for driving the spinning rotor (10) provided voltage is regulated.
EP10005341.2A 2009-07-11 2010-05-21 Workstation of an open end rotor spinning machine and procedure for operating the workstation Not-in-force EP2298970B1 (en)

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CZ306762B6 (en) * 2012-10-23 2017-06-21 Rieter Cz S.R.O. A method of controlling yarn piecing and stopping operations at the workstation of a rotor spinning machine
CN103245333B (en) * 2013-05-09 2015-04-22 浙江理工大学 Measurement device for yarn movement in shear flow field in high-speed spinning cup
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EP3118356B1 (en) 2015-07-17 2020-11-04 Rieter CZ s.r.o. Methods for securely starting and/or stopping a rotor of a rotor spinning machine and rotor spinning machine

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BRPI1002624A2 (en) 2012-03-27
DE102009032716A1 (en) 2011-01-13
CN101956256B (en) 2014-04-23
CN101956256A (en) 2011-01-26
EP2298970A3 (en) 2014-11-05

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