EP0765957A2 - Drive and bearing for a shaft-less open-end spinning rotor - Google Patents

Drive and bearing for a shaft-less open-end spinning rotor Download PDF

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Publication number
EP0765957A2
EP0765957A2 EP96115129A EP96115129A EP0765957A2 EP 0765957 A2 EP0765957 A2 EP 0765957A2 EP 96115129 A EP96115129 A EP 96115129A EP 96115129 A EP96115129 A EP 96115129A EP 0765957 A2 EP0765957 A2 EP 0765957A2
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EP
European Patent Office
Prior art keywords
gas
bearing
stator
outlet bores
housing
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.)
Withdrawn
Application number
EP96115129A
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German (de)
French (fr)
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EP0765957A3 (en
Inventor
Wilhelm Birkenmaier
Anton Dr.Ing. Paweletz
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.)
SKF Textilmaschinen Komponenten GmbH
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SKF Textilmaschinen Komponenten GmbH
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Publication date
Application filed by SKF Textilmaschinen Komponenten GmbH filed Critical SKF Textilmaschinen Komponenten GmbH
Publication of EP0765957A2 publication Critical patent/EP0765957A2/en
Publication of EP0765957A3 publication Critical patent/EP0765957A3/en
Withdrawn legal-status Critical Current

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    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01HSPINNING OR TWISTING
    • D01H4/00Open-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
    • D01H4/04Open-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
    • D01H4/08Rotor spinning, i.e. the running surface being provided by a rotor
    • D01H4/12Rotor bearings; Arrangements for driving or stopping
    • D01H4/14Rotor driven by an electric motor

Definitions

  • the invention relates to a device for an OE spinning machine with drive and bearing for a shaftless spinning rotor according to the preamble of claim 1.
  • Such a device with drive and bearing for a shaftless OE spinning rotor is known from patent application WO 92/01096.
  • Their combined Manget gas bearing with plane-parallel bearing surfaces is characterized by extremely low friction losses and by a radial force-free rotation of the spinning rotor mounted on it around the axis of gravity in the supercritical speed range.
  • Such a device is particularly suitable for driving very rapidly rotating spinning rotors.
  • the gas outlet bores of the gas bearing are arranged between a central centering and holding magnet arrangement and the core of the stator. You are therefore close to the axis of rotation of the spinning rotor. Since the bearing surface to be supported increases with the square of the distance from the axis of rotation, the gas supporting force in the edge region can be inadequate, particularly in the case of large rotors. This can only be countered in the known device by correspondingly increasing the gas pressure, which results in a greater outlay, particularly in terms of energy. In addition, the arrangement of the gas outlet bores near the axis of rotation in the case of large rotors does not result in sufficient stability of the bearing in transient drive phases of the rotor and a tendency to wobble.
  • the object of the invention is to improve the operational safety of the device.
  • the device should be suitable for driving spinning rotors of different sizes.
  • the arrangement according to the invention of the gas outlet bores in the cross-sectional area of the core of the stator results in an advantageous and inexpensive pressure distribution in the bearing surface.
  • the gas is distributed without disturbing the uniformity of the magnetic flux.
  • the gas outlet openings can be arranged within the annular gap without the core of the stator having to be damaged for this purpose.
  • the gas distribution according to the invention results in a gas pressure distribution that is matched to this, particularly in the case of large rotor diameters.
  • the arrangement of rings in the annular gap on both sides results in a gas space for gas distribution in the annular gap.
  • the gas outlet bores and a gas inlet opening are easy to make in these rings.
  • stator cores are segment-like, there are winding gaps through which axial projections of the upper ring can pass. These axial projections carry the gas outlet bores. Recesses in the area of the exit holes reduce the hole length.
  • the design of the gas store as a two-circuit system opens up various possibilities for increasing the flexibility of the system if both circuits can be operated together or individually with the same or different gas pressure. Different combinations can be used to meet a wide variety of requirements with regard to operating conditions or operational safety. In the event of faults in one circuit, operational safety can also be guaranteed by the other circuit. In addition, an adaptation to different rotors can be done easily.
  • the arrangement of pressure sensors in the gas supply system enables specific monitoring and controllability of the storage gas pressure. This increases the operational reliability of the system.
  • a further additional increase in the operational reliability of the system can result if temperature sensors are provided for checking the storage temperature. These can be positioned and contacted together with Hall sensors for motor control available for motor control on a sensor board designed as a conductor foil. Both types of sensors are then in the free winding gaps, with the temperature sensors preferably being in other winding gaps as the Hall sensors.
  • Figure 1 shows a longitudinal section of the device with attached spinning rotor 1, which is positioned in a spinning machine, not shown, that the axis of rotation and the extraction nozzle are aligned.
  • a core 2 of the stator with multi-phase winding 3 is firmly and tightly cast with a sealing compound 5 in a one-piece stator housing 4.
  • stator housing 4 In the stator housing 4, the following elements are combined to form a part or formed on it:
  • a yoke disk 14 for holding and centering magnets 15 and connections 16 for supply lines 17 are integrated in the stator housing 4.
  • the potting compound 5 filling the winding gaps, together with the wall of the stator housing 4 and the holding and centering magnets 15, form the plane-parallel bearing surface 8.
  • the open side of the gas space 18 in the stator housing 4 is sealed by a gas bearing cover 20 with an injected connecting piece 21 containing a threaded bore.
  • the gas bearing cover 20 is screwed to a threaded pin 22 of the yoke disk 14 injected into the stator housing 4.
  • the gas space 18 of the stator housing 4 is reinforced by internal ribs 23.
  • the winding connections 24 are led out through segment-shaped openings in the stator housing 4 and connected to a contact point 25 together with the sensor board 13.
  • the elastic suspension of the stator consists of the spring and damping elements 10 and 11 which are designed as leaf springs 10 molded onto a lower housing part 26 of a device housing 27 and molded rod springs 11 at their free ends.
  • the bar springs 11 are snapped into the holder 9 of the stator housing 4.
  • the centering neck of the device housing 27 serves as a fitting element 28 for the installation of the device in the spinning machine.
  • the bearing center determined by the holding and centering magnets 15 is positioned by determining and by means of the spinning rotor 1 rotating supercritically in the installed position of the device radial displacement of the lower housing part 26 relative to an upper housing part 29 is brought into the central position and is fixed there by connecting screws 30 of the device housing 27.
  • the device works as follows: A balance is formed between the gas pressure and the magnetic force of the holding and centering magnets 15, so that the spinning rotor 1 can rotate about its axis of gravity without contact and supercritically. So that the spinning rotor 1 can pass through critical speeds without problems, the vibrations which occur and are transmitted to the stator via a rigid magnetic guide are damped by its elastic suspension in the device housing 27.
  • the spinning rotor 1 is surrounded by a guide ring 32 of the device housing 27 to form an annular gap 31, which guides the rotor deflection e.g. in the critical speed, limited.
  • FIG. 2 shows a top view of the stator with two partial sections of its stator housing 4.
  • the connections 16 of the supply for the cooling channel 7 integrated in the stator housing 4 are made visible.
  • the other partial section shows the winding 3 located under the potting compound 5 and the sensor board 13 with a sensor 33 in the winding gap 34.
  • the combined magnetic-gas bearing 35 are shown as rings; a circle of gas outlet bores 19 in the stator housing 4 is visible around the annular holding and centering magnets 15.
  • the sensor board 13 is guided to the contact point 25 through a segment-shaped opening in the stator housing 4.
  • FIG. 3 shows in longitudinal section an embodiment with a one-piece stator and device housing.
  • the stator housing 4 and the lower housing part 26 are a common part, wherein between the two connections 36 are designed as spring and damping elements.
  • This one-piece housing is positioned using the same means of the exemplary embodiment described.
  • FIGS. 5 and 6 show the exemplary embodiment of a stator with a gas bearing 35 as a two-circuit system, in which the outlet bores 19 of one circle lie in the inner diameter region of the core 2 and outlet bores 37 of the second circle lie in the cross-sectional region of the core 2.
  • the core 2 consists of two concentric partial cores 38; 39, which form an annular gap 40 for gas distribution, which at both ends of rings 41; 42 is sealed. These are shown in more detail in FIGS. 5 and 6.
  • Fig. 5 shows the two rings 41; 42 in longitudinal section.
  • the upper ring 41 is connected to the lower ring 42 by webs 43, the thickness of which is smaller than the width of the annular gap 40.
  • the upper ring 41 has axial projections 45 for the outlet bores 37. After the assembly, the projections 45 lie in winding gaps 34 of the stator and have the length of the cast winding 3.
  • the lower ring 42 has a gas inlet opening 46 which can be connected to a connecting piece 44.
  • Fig. 6 shows a top view of the upper ring 41; The webs 43 are visible in 3 partial sections. On the upper ring 41, the axial projections 45, which end in the bearing surface 8 after the stator has been installed, are shown with the outlet bores 37.
  • the exemplary embodiment according to FIG. 4 can be simplified by dispensing with the inner gas bearing circuit. This eliminates the inner outlet bores 19 and the gas bearing cover 20 with connecting pieces. If the outlet bores 37 lie in the cross-sectional area of the stator, a gas pressure distribution which is matched to the larger rotor diameter is obtained.

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

Abstract

The rotor forms the runner of an axial field motor. The housing of the stator and the gas bearing are incorporated into a one-piece stator housing which integrates the cooling means, the gas distribution system and holders for the spring and damping elements for the stator housing suspension. A yoke disc of the magnetic bearing and connections for supply lines are also incorporated. A gas space is closed on the open side by a gas storage lid. The installation housing features fitting elements determined in accordance with the spinning machine.

Description

Die Erfindung betrifft eine Vorrichtung für eine OE-Spinnmaschine mit Antrieb und Lager für einen schaftlosen Spinnrotor nach dem Oberbegriff des Anspruches 1.The invention relates to a device for an OE spinning machine with drive and bearing for a shaftless spinning rotor according to the preamble of claim 1.

Eine derartige Vorrichtung mit Antrieb und Lager für einen schaftlosen OE-Spinnrotor ist aus der Patentanmeldung WO 92/01096 bekannt. Deren kombiniertes Manget-Gaslager mit planparallelen Lagerflächen zeichnet sich durch extrem niedrige Reibungsverluste und durch eine radialkräftefreie Rotation des darauf gelagerten Spinnrotors um die Schwerachse im überkritischen Drehzahlbereich aus. Eine solche Vorrichtung eignet sich besonders für den Antrieb sehr schnell rotierender Spinnrotoren.Such a device with drive and bearing for a shaftless OE spinning rotor is known from patent application WO 92/01096. Their combined Manget gas bearing with plane-parallel bearing surfaces is characterized by extremely low friction losses and by a radial force-free rotation of the spinning rotor mounted on it around the axis of gravity in the supercritical speed range. Such a device is particularly suitable for driving very rapidly rotating spinning rotors.

Die Gasaustrittsbohrungen des Gaslagers sind zwischen einer zentrischen Zentrier- und Haltemagnetanordnung und dem Kern des Stators angeordnet. Sie befinden sich demzufolge in der Nähe der Rotationsachse des Spinnrotors. Da mit dem Quadrat der Entfernung von der Rotationsachse die zu stützende Lagerfläche zunimmt, kann insbesondere bei großen Rotoren die Gasstützkraft im Randbereich unzureichend sein. Dem kann bei der bekannten Vorrichtung nur begegnet werden, indem der Gasdruck entsprechend erhöht wird, wodurch sich ein größerer Aufwand, vor allem an Energie, ergibt. Außerdem entsteht durch die Anordnung der Gasaustrittsbohrungen nahe der Rotationsachse bei großen Rotoren keine ausreichende Stabilität der Lagerung in transienten Antriebsphasen des Rotors und eine Neigung zu Taumelbewegungen.The gas outlet bores of the gas bearing are arranged between a central centering and holding magnet arrangement and the core of the stator. You are therefore close to the axis of rotation of the spinning rotor. Since the bearing surface to be supported increases with the square of the distance from the axis of rotation, the gas supporting force in the edge region can be inadequate, particularly in the case of large rotors. This can only be countered in the known device by correspondingly increasing the gas pressure, which results in a greater outlay, particularly in terms of energy. In addition, the arrangement of the gas outlet bores near the axis of rotation in the case of large rotors does not result in sufficient stability of the bearing in transient drive phases of the rotor and a tendency to wobble.

Aufgabe der Erfindung ist es, die Betriebssicherheit der Vorrichtung zu verbessern. Die Vorrichtung soll für den Antrieb unterschiedlich großer Spinnrotoren geeignet sein.The object of the invention is to improve the operational safety of the device. The device should be suitable for driving spinning rotors of different sizes.

Diese Aufgabe wird durch durch die kennzeichenenden Merkmale des Anspruches 1 gelöst.This object is achieved by the characterizing features of claim 1.

Durch die erfindungsgemäße Anordnung der Gasaustrittsbohrungen im Querschnittsbereich des Kerns des Stators ergibt sich eine vorteilhafte und kostengünstig herstellbare Druckverteilung in der Lagerfläche. Dabei erfolgt die Gasverteilung, ohne die Gleichmäßigkeit des magnetischen Flusses zu stören. Die Gasaustrittsöffnungen lassen sich innerhalb des Ringspaltes anordnen, ohne daß hierfür der Kern des Stators beschädigt werden muß. Die erfindungsgemäße Gasverteilung ergibt insbesondere bei großen Rotordurchmessern eine darauf abgestimmte Gasdruckverteilung.The arrangement according to the invention of the gas outlet bores in the cross-sectional area of the core of the stator results in an advantageous and inexpensive pressure distribution in the bearing surface. The gas is distributed without disturbing the uniformity of the magnetic flux. The gas outlet openings can be arranged within the annular gap without the core of the stator having to be damaged for this purpose. The gas distribution according to the invention results in a gas pressure distribution that is matched to this, particularly in the case of large rotor diameters.

Die Erfindung ist vorteilhaft durch die Merkmale der Ansprüche 2 bis 7 weitergebildet.The invention is advantageously developed by the features of claims 2 to 7.

Durch die beidseitige Anordnung von Ringen im Ringspalt ergibt sich im Ringspalt ein Gasraum für die Gasverteilung. In diese Ringe sind die Gasaustrittsbohrungen sowie auch eine Gaseintrittsöffnung einfach einzubringen.The arrangement of rings in the annular gap on both sides results in a gas space for gas distribution in the annular gap. The gas outlet bores and a gas inlet opening are easy to make in these rings.

Da die Wicklungen von derartigen Statorkernen segmentartig ausgebildet sind, ergeben sich Wicklungsspalte, durch die axiale Vorsprünge des oberen Ringes hindurchtreten können. Diese axialen Vorsprünge tragen die Gasaustrittsbohrungen. Aussparungen im Bereich der Austrittsbohrungen vermindern die Bohrungslänge.Since the windings of such stator cores are segment-like, there are winding gaps through which axial projections of the upper ring can pass. These axial projections carry the gas outlet bores. Recesses in the area of the exit holes reduce the hole length.

Die Ausbildung des Gaslagers als Zweikreissystem eröffnet verschiedene Möglichkeiten zur Erhöhung der Flexibilität des Systemes, wenn beide Kreise gemeinsam oder je einzeln mit gleichem oder verschiedenem Gasdruck betrieben werden können. Durch verschiedene Kombinationen kann man den unterschiedlichsten Anforderungen bezüglich der Betriebszustände oder der Betriebssicherheit gerecht werden. Im Falle der Störungen in einem Kreis kann so auch durch den anderen Kreis die Betriebssicherheit gewährleistet werden. Außerdem kann eine Anpassung an verschiedene Rotoren ohne weiteres erfolgen.The design of the gas store as a two-circuit system opens up various possibilities for increasing the flexibility of the system if both circuits can be operated together or individually with the same or different gas pressure. Different combinations can be used to meet a wide variety of requirements with regard to operating conditions or operational safety. In the event of faults in one circuit, operational safety can also be guaranteed by the other circuit. In addition, an adaptation to different rotors can be done easily.

Durch die Anordnung von Drucksensoren im Gasversorgungssystem kann eine spezifische Überwachung sowie Regelbarkeit des Lagergasdruckes erfolgen. Damit erhöht sich die Betriebssicherheit des Systemes zusätzlich.The arrangement of pressure sensors in the gas supply system enables specific monitoring and controllability of the storage gas pressure. This increases the operational reliability of the system.

Eine weitere zusätzliche Erhöhung der Betriebssicherheit des Systemes kann sich ergeben, wenn Temperatursensoren zur Kontrolle der Lagertemperatur vorgesehen sind. Diese können gemeinsam mit zur Motorsteuerung vorhandenen Hallsensoren zur Motorsteuerung auf einer als Leiterfolie ausgebildeten Sensorplatine positioniert und kontaktiert sein. Beide Arten von Sensoren liegen dann in den freien Wicklungsspalten, wobei vorzugsweise die Temperatursensoren in anderen Wicklungsspalten wie die Hallsensoren liegen.A further additional increase in the operational reliability of the system can result if temperature sensors are provided for checking the storage temperature. These can be positioned and contacted together with Hall sensors for motor control available for motor control on a sensor board designed as a conductor foil. Both types of sensors are then in the free winding gaps, with the temperature sensors preferably being in other winding gaps as the Hall sensors.

Die Erfindung ist anhand von Ausführungsbeispielen näher beschrieben.The invention is described in more detail using exemplary embodiments.

Es zeigen:

Fig. 1
Längsschnitt durch die Vorrichtung mit einem Einkreis-Gassystem;
Fig. 2
Draufsicht auf den Stator ohne das Vorrichtungsgehäuse mit zwei Teilschnitten im Statorgehäuse;
Fig. 3
Längsschnitt durch das Statorgehäuse und Gehäuseunterteil als Ausfuhrung mit einteiligem gemeinsamen Gehäuse;
Fig. 4
Längsschnitt durch den Stator mit einem Zweikreis-Gassystem;
Fig. 5
Längsschnitt durch die beiden Ringe der Ausführung nach Fig. 4;
Fig. 6
Draufsicht auf den oberen Ring in der Ausführung nach Fig. 4.
Show it:
Fig. 1
Longitudinal section through the device with a single-circuit gas system;
Fig. 2
Top view of the stator without the device housing with two partial sections in the stator housing;
Fig. 3
Longitudinal section through the stator housing and housing lower part as an embodiment with a one-piece common housing;
Fig. 4
Longitudinal section through the stator with a two-circuit gas system;
Fig. 5
Longitudinal section through the two rings of the embodiment of FIG. 4;
Fig. 6
Top view of the upper ring in the embodiment according to FIG. 4.

Figur 1 zeigt einen Längsschnitt der Vorrichtung mit aufgesetztem Spinnrotor 1, die so in einer nicht dargestellten Spinnmaschine positioniert ist, daß Rotations- und Abzugsdüsenachse fluchten. Ein Kern 2 des Stators mit mehrphasiger Wicklung 3 ist in ein einteiliges Statorgehäuse 4 fest und dicht mit einer Vergußmasse 5 eingegossen.Figure 1 shows a longitudinal section of the device with attached spinning rotor 1, which is positioned in a spinning machine, not shown, that the axis of rotation and the extraction nozzle are aligned. A core 2 of the stator with multi-phase winding 3 is firmly and tightly cast with a sealing compound 5 in a one-piece stator housing 4.

Im Statorgehäuse 4 sind folgende Elemente zu einem Teil zusammengefaßt bzw. an diesem ausgeformt:In the stator housing 4, the following elements are combined to form a part or formed on it:

Gaslagergehäuse mit Gasverteilung 6, ein Kühlkanal 7 für die Kühlung des Stators und einer Lagerfläche 8, Halter 9 für die Feder- und Dämpfungselemente 10; 11, ein Träger 12 für eine Sensorplatine 13. Eine Jochscheibe 14 für Halte- und Zentriermagnete 15 und Anschlüsse 16 für Versorgungsleitungen 17 sind in das Statorgehäuse 4 integriert. Auf der rotorzugewandten Seite des Stators bildet die die Wicklungsspalte ausfüllende Vergußmasse 5 zusammen mit der Wand des Statorgehäuses 4 und den Halte- und Zentriermagneten 15 die planparallele Lagerfläche 8. In diese münden aus einem Gasraum 18 kommende und dicht an dessen Rand liegende Austrittsbohrungen 19.Gas bearing housing with gas distribution 6, a cooling channel 7 for cooling the stator and a bearing surface 8, holder 9 for the spring and damping elements 10; 11, a carrier 12 for a sensor circuit board 13. A yoke disk 14 for holding and centering magnets 15 and connections 16 for supply lines 17 are integrated in the stator housing 4. On the rotor-facing side of the stator, the potting compound 5 filling the winding gaps, together with the wall of the stator housing 4 and the holding and centering magnets 15, form the plane-parallel bearing surface 8.

Die offene Seite des Gasraumes 18 im Statorgehäuse 4 wird durch einen Gaslagerdeckel 20 mit eingespritztem, eine Gewindebohrung enthaltenden Anschlußstutzen 21 abgedichtet. Der Gaslagerdeckel 20 ist mit einem Gewindezapfen 22 der in das Statorgehäuse 4 eingespritzten Jochscheibe 14 verschraubt. Der Gasraum 18 des Statorgehäuses 4 ist durch innenliegende Rippen 23 verstärkt. Auf dem Täger 12 des Statorgehäuses 4 liegt die Sensorplatine 13, die als flexible Leiterfolie ausgebildet ist und in der Lagerfläche 8 durch die Vergußmasse 5 fixiert wird. Die Wicklungsanschlüsse 24 sind durch segmentförmige Öffnungen im Statorgehäuse 4 herausgeführt und zusammen mit der Sensorplatine 13 an einer Kontaktstelle 25 angeschlossen.The open side of the gas space 18 in the stator housing 4 is sealed by a gas bearing cover 20 with an injected connecting piece 21 containing a threaded bore. The gas bearing cover 20 is screwed to a threaded pin 22 of the yoke disk 14 injected into the stator housing 4. The gas space 18 of the stator housing 4 is reinforced by internal ribs 23. The sensor board 13, which is designed as a flexible conductor film and is fixed in the bearing surface 8 by the sealing compound 5, lies on the carrier 12 of the stator housing 4. The winding connections 24 are led out through segment-shaped openings in the stator housing 4 and connected to a contact point 25 together with the sensor board 13.

Die elastische Aufhängung des Stators besteht aus den Feder- und Dämpfungselementen 10 und 11, die als an einem Gehäuseunterteil 26 eines Vorrichtungsgehäuses 27 angespritzte Blattfedern 10 und an deren freien Enden angeformte Stabfedern 11 ausgebildet sind. Die Stabfedern 11 sind in die Halter 9 des Statorgehäuses 4 eingerastet.The elastic suspension of the stator consists of the spring and damping elements 10 and 11 which are designed as leaf springs 10 molded onto a lower housing part 26 of a device housing 27 and molded rod springs 11 at their free ends. The bar springs 11 are snapped into the holder 9 of the stator housing 4.

Als Paßelement 28 für den Einbau der Vorrichtung in die Spinnmaschine dient der Zentrierhals des Vorrichtungsgehäuses 27. Zu diesem wird das von den Halte- und Zentriermagneten 15 bestimmte Lagerzentrum positioniert, indem es mit Hilfe des in der Einbaulage der Vorrichtung überkritisch drehenden Spinnrotors 1 ermittelt und durch radiale Verschiebung des Gehäuseunterteils 26 gegenüber einem Gehäuseoberteil 29 in die zentrische Lage gebracht und dort durch Verbindungsschrauben 30 des Vorrichtungsgehäuses 27 fixiert wird.The centering neck of the device housing 27 serves as a fitting element 28 for the installation of the device in the spinning machine. To this, the bearing center determined by the holding and centering magnets 15 is positioned by determining and by means of the spinning rotor 1 rotating supercritically in the installed position of the device radial displacement of the lower housing part 26 relative to an upper housing part 29 is brought into the central position and is fixed there by connecting screws 30 of the device housing 27.

Die Vorrichtung arbeitet folgendermaßen: Zwischen Gasdruck und der Magnetkraft der Halte- und Zentriermagneten 15 bildet sich ein Gleichgewicht aus, so daß der Spinnrotor 1 berührungslos und überkritisch um seine Schwerachse rotieren kann. Damit der Spinnrotor 1 problemlos kritische Drehzahlen durchfahren kann, werden die dabei auftretenden und über eine steife magnetische Führung auf den Stator übertragenen Schwingungen durch dessen elastische Aufhängung im Vorrichtungsgehäuse 27 gedämpft. Der Spinnrotor 1 ist unter Bildung eines Ringspaltes 31 von einem Führungsring 32 des Vorrichtungsgehäuses 27 umgeben, der die Rotorauslenkung z.B. in der kritischen Drehzahl, begrenzt.The device works as follows: A balance is formed between the gas pressure and the magnetic force of the holding and centering magnets 15, so that the spinning rotor 1 can rotate about its axis of gravity without contact and supercritically. So that the spinning rotor 1 can pass through critical speeds without problems, the vibrations which occur and are transmitted to the stator via a rigid magnetic guide are damped by its elastic suspension in the device housing 27. The spinning rotor 1 is surrounded by a guide ring 32 of the device housing 27 to form an annular gap 31, which guides the rotor deflection e.g. in the critical speed, limited.

Fig. 2 zeigt als Draufsicht den Stator mit zwei Teilschnitten seines Statorgehäuses 4. In einem Teilschnitt sind die im Statorgehäuse 4 integrierten Anschlüsse 16 der Versorgung für den Kühlkanal 7 sichtbar gemacht. Der andere Teilschnitt zeigt die unter der Vergußmasse 5 befindliche Wicklung 3 und die Sensorplatine 13 mit einem Sensor 33 im Wicklungsspalt 34. Im Zentrum sind als Ringe das kombinierte Magnet-Gaslager 35 dargestellt; um die ringförmigen Halte- und Zentriermagnete 15 ist ein Kreis von Gas-Austrittsbohrungen 19 im Statorgehäuse 4 sichtbar. Durch eine segmentförmige Öffnung im Statorgehäuse 4 ist die Sensorplatine 13 zur Kontaktstelle 25 geführt.2 shows a top view of the stator with two partial sections of its stator housing 4. In a partial section, the connections 16 of the supply for the cooling channel 7 integrated in the stator housing 4 are made visible. The other partial section shows the winding 3 located under the potting compound 5 and the sensor board 13 with a sensor 33 in the winding gap 34. In the center, the combined magnetic-gas bearing 35 are shown as rings; a circle of gas outlet bores 19 in the stator housing 4 is visible around the annular holding and centering magnets 15. The sensor board 13 is guided to the contact point 25 through a segment-shaped opening in the stator housing 4.

Fig. 3 zeigt im Längsschnitt eine Ausführung mit einem einteiligen Stator-und Vorrichtungsgehäuse. Das Statorgehäuse 4 und das Gehäuseunterteil 26 sind ein gemeinsames Teil, wobei zwischen beiden Verbindungen 36 als Feder- und Dämpfungselemente ausgeführt sind. Die Positionierung dieses einstückigen Gehäuses erfolgt mit den gleichen Mitteln des beschriebenen Ausführungsbeispiels.3 shows in longitudinal section an embodiment with a one-piece stator and device housing. The stator housing 4 and the lower housing part 26 are a common part, wherein between the two connections 36 are designed as spring and damping elements. This one-piece housing is positioned using the same means of the exemplary embodiment described.

Fig. 4 zeigt das Ausführungsbeispiel eines Stators mit einem Gaslager 35 als Zweikreissystem, bei dem die Austrittsbohrungen 19 des einen Kreises im Innendurchmesserbereich des Kerns 2 und Austrittsbohrungen 37 des zweiten Kreises im Querschnittsbereich des Kerns 2 liegen. Die beiden Kreise können je nach den Betriebsbedingungen einzeln oder gemeinsam, mit gleichem oder unterschiedlichem Gasdruck zugeschaltet werden. Der Kern 2 besteht aus zwei konzentrischen Teilkernen 38; 39, die einen Ringspalt 40 zur Gasverteilung bilden, der an beiden Enden von Ringen 41; 42 dichtend abgeschlossen wird. Diese sind in den Figuren 5 und 6 genauer dargestellt.4 shows the exemplary embodiment of a stator with a gas bearing 35 as a two-circuit system, in which the outlet bores 19 of one circle lie in the inner diameter region of the core 2 and outlet bores 37 of the second circle lie in the cross-sectional region of the core 2. Depending on the operating conditions, the two circuits can be switched on individually or together, with the same or different gas pressure. The core 2 consists of two concentric partial cores 38; 39, which form an annular gap 40 for gas distribution, which at both ends of rings 41; 42 is sealed. These are shown in more detail in FIGS. 5 and 6.

Fig. 5 zeigt die beiden Ringe 41; 42 im Längsschnitt. Der obere Ring 41 ist mit dem unteren Ring 42 durch Stege 43 verbunden, deren Dicke kleiner als die Breite des Ringspaltes 40 ist. Der obere Ring 41 besitzt axiale Vorsprünge 45 für die Austrittsbohrungen 37. Die Vorsprünge 45 liegen nach der Montage in Wicklungsspalten 34 des Stators und haben die Länge der vergossenen Wicklung 3. Der untere Ring 42 weist eine mit einem Anschlußstutzen 44 verbindbare Gaseintrittsöffnung 46 auf.Fig. 5 shows the two rings 41; 42 in longitudinal section. The upper ring 41 is connected to the lower ring 42 by webs 43, the thickness of which is smaller than the width of the annular gap 40. The upper ring 41 has axial projections 45 for the outlet bores 37. After the assembly, the projections 45 lie in winding gaps 34 of the stator and have the length of the cast winding 3. The lower ring 42 has a gas inlet opening 46 which can be connected to a connecting piece 44.

Fig. 6 zeigt eine Draufsicht auf den oberen Ring 41; in 3 Teilschnitten sind die Stege 43 sichtbar. Auf dem oberen Ring 41 sind die axialen Vorsprünge 45, die in der Lagerfläche 8 nach der Montage des Stators enden, mit den Austrittsbohrungen 37 dargestellt.Fig. 6 shows a top view of the upper ring 41; The webs 43 are visible in 3 partial sections. On the upper ring 41, the axial projections 45, which end in the bearing surface 8 after the stator has been installed, are shown with the outlet bores 37.

Für Spinnrotoren größeren Durchmessers kann das Ausführungsbeispiel nach Figur 4 vereinfacht werden, indem auf den inneren Gaslagerkreis verzichtet wird. Dadurch entfallen die inneren Austrittsbohrungen 19 und der Gaslagerdeckel 20 mit Anschlußstutzen. Liegen die Austrittsbohrungen 37 im Querschnittsbereich des Stators, erhält man eine auf den größeren Rotordurchmesser abgestimmte Gasdruckverteilung.For spinning rotors of larger diameter, the exemplary embodiment according to FIG. 4 can be simplified by dispensing with the inner gas bearing circuit. This eliminates the inner outlet bores 19 and the gas bearing cover 20 with connecting pieces. If the outlet bores 37 lie in the cross-sectional area of the stator, a gas pressure distribution which is matched to the larger rotor diameter is obtained.

Claims (7)

Vorrichtung für eine OE-Spinnmaschine mit Antrieb und Lager für einen schaftlosen Spinnrotor (1), der den Läufer eines Axialfeldmotors bildet, wobei die Vorrichtung einen Stator mit einem hohlzylindrischen Kern (2) und Wicklung (3) und ein kombiniertes Magnet-/Gaslager mit Gasaustrittsbohrungen (37) in einer axialen Lagerfläche (8) mit achssymmetrischer Gasverteilung umfaßt,
dadurch gekennzeichnet,
daß die Gasaustrittsbohrungen (37) im Querschnittsbereich des Kerns (2) des Stators liegen, wobei dieser aus zwei konzentrischen Teilkernen (38, 39) besteht, die einen Ringspalt (40) für die Gasverteilung bilden.
Device for an OE spinning machine with drive and bearing for a shaftless spinning rotor (1) which forms the rotor of an axial field motor, the device comprising a stator with a hollow cylindrical core (2) and winding (3) and a combined magnetic / gas bearing Comprises gas outlet bores (37) in an axial bearing surface (8) with axially symmetrical gas distribution,
characterized,
that the gas outlet bores (37) lie in the cross-sectional area of the core (2) of the stator, which consists of two concentric partial cores (38, 39) which form an annular gap (40) for the gas distribution.
Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Ringspalt (40) beidseitig durch Ringe (41, 42) abgeschlossen ist, die durch Stege (43) miteinander verbunden sind, deren Dicke kleiner als die Ringspaltbreite ist.Device according to claim 1, characterized in that the annular gap (40) is closed on both sides by rings (41, 42) which are connected to one another by webs (43), the thickness of which is smaller than the annular gap width. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der obere Ring (41) axiale Vorsprünge (45) für die Gasaustrittsbohrungen (37) aufweist, die in den Wicklungsspalten liegen.Device according to claim 1 or 2, characterized in that the upper ring (41) has axial projections (45) for the gas outlet bores (37) which lie in the winding gaps. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß der obere Ring (41) im Bereich der Gasaustrittsbohrungen (37) Aussparungen zur Verkürzung der Bohrungslänge hat.Apparatus according to claim 3, characterized in that the upper ring (41) in the area of the gas outlet bores (37) has cutouts for shortening the bore length. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der untere Ring (42) eine mit einem Anschlußstutzen (44) in Verbindung stehende Gaseintrittsöffnung (46) aufweist.Device according to one of claims 1 to 4, characterized in that the lower ring (42) has a gas inlet opening (46) which is connected to a connecting piece (44). Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Gaslager (35) als Zweikreissystem ausgebildet ist, wobei zusätzlich Gasaustrittsbohrungen (19) im Bereich des Innendurchmessers des Kerns (2) liegen und daß die beiden Kreise betriebsbedingungsabhängig einzeln oder gemeinsam mit gleichem oder verschiedenem Gasdruck zuschaltbar sind.Device according to one of claims 1 to 5, characterized in that the gas bearing (35) is designed as a two-circuit system, with additional gas outlet bores (19) in the region of the inner diameter of the core (2) and that the two circles, depending on the operating conditions, individually or together with the same or different gas pressure can be switched on. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß Drucksensoren im Einkreissystem oder im Zweikreissystem in den Gaszuleitungen oder in der Gasverteilung (6) und dem Ringspalt (40) zur Überwachung des Gasdruckes für das Gaslager (35) vorgesehen sind.Device according to one of claims 1 to 6, characterized in that pressure sensors are provided in the one-circuit system or in the two-circuit system in the gas supply lines or in the gas distribution (6) and the annular gap (40) for monitoring the gas pressure for the gas bearing (35).
EP96115129A 1992-03-11 1993-02-26 Drive and bearing for a shaft-less open-end spinning rotor Withdrawn EP0765957A3 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4207673 1992-03-11
DE4207673A DE4207673C1 (en) 1992-03-11 1992-03-11
EP93904021A EP0630430A1 (en) 1992-03-11 1993-02-26 Drive and bearing for a shaft-less open-end spinning rotor

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EP0765957A3 EP0765957A3 (en) 1997-07-09

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EP93904021A Withdrawn EP0630430A1 (en) 1992-03-11 1993-02-26 Drive and bearing for a shaft-less open-end spinning rotor

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EP (2) EP0765957A3 (en)
JP (1) JPH07507104A (en)
DE (1) DE4207673C1 (en)
WO (1) WO1993018212A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0875685A2 (en) * 1997-04-28 1998-11-04 Ntn Corporation Combined externally pressurized gas-magnetic bearing assembly and spindle device utilizing the same

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4342584A1 (en) * 1993-12-14 1995-06-22 Skf Textilmasch Komponenten Motor drive useful esp. for shaftless open end spinning rotor
DE4342582A1 (en) * 1993-12-14 1995-06-22 Skf Textilmasch Komponenten Magnetic gas bearing for shaftless rotor of open end spinner
DE4404243B4 (en) * 1994-02-10 2005-08-25 Saurer Gmbh & Co. Kg Method and device for operating an open-end rotor spinning unit with single-motor electrical drive of the spinning rotor
DE4409992A1 (en) * 1994-03-23 1995-09-28 Skf Textilmasch Komponenten Separate motor drive for shaftless rotor of an open end spinner
DE4421406A1 (en) * 1994-06-18 1995-12-21 Skf Textilmasch Komponenten Motor drive for shaftless rotor of an open end spinner
DE19532735B4 (en) * 1995-09-05 2004-02-05 Stahlecker, Fritz Thread take-off nozzle for OE rotor spinning machines
DE19608267C1 (en) * 1996-03-05 1997-03-06 Skf Textilmasch Komponenten Open-end spinning rotor direct driven by axial field motor
CZ284734B6 (en) * 1997-09-02 1999-02-17 Rieter Elitex A.S. Rotor spinning machine spinning apparatus
CZ2013209A3 (en) * 2013-03-22 2014-08-27 Rieter Cz S.R.O. Method of determining changes in position of open-end spinning machine spinning rotor within a cavity of an active magnetic bearing and spinning unit of the a rotor spinning machine with active magnetic bearing for mounting spindleless spinning rotor
DE102018117861A1 (en) * 2018-07-24 2020-01-30 Saurer Spinning Solutions Gmbh & Co. Kg Open-end rotor spinning device
DE102018006783A1 (en) * 2018-08-28 2020-03-05 Saurer Spinning Solutions Gmbh & Co. Kg Nozzle attachment for an open-end rotor spinning device
CN109488689B (en) * 2018-11-26 2024-02-02 杭州电子科技大学 Bearing compensation device and method for air floatation spindle

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0190440A2 (en) * 1985-02-04 1986-08-13 SKF Nova AB A device with a thrust bearing
JPS6421216A (en) * 1987-07-16 1989-01-24 Fanuc Ltd Pneumatic bearing electrically-driven motor
WO1992001096A1 (en) * 1990-07-10 1992-01-23 Skf Textilmaschinen-Komponenten Gmbh Drive and bearing for a shaftless open-end spinning rotor

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2517973C2 (en) * 1975-04-23 1980-10-30 Dornier System Gmbh, 7990 Friedrichshafen Bearing for high-speed rotating, horizontal spindles of spinning turbines
DE2630031A1 (en) * 1976-07-03 1978-01-12 Teldix Gmbh BEARING AND DRIVE ARRANGEMENT FOR AN OPEN-END SPINNING TURBINE
DE2640111C2 (en) * 1976-09-07 1984-12-06 Teldix Gmbh, 6900 Heidelberg OE rotor spinning unit
DE3000357C2 (en) * 1980-01-07 1982-12-30 Arthur Pfeiffer Vakuumtechnik Wetzlar Gmbh, 6334 Asslar Mechanical auxiliary bearing for magnetic storage
EP0082549B1 (en) * 1981-12-22 1985-11-27 BBC Aktiengesellschaft Brown, Boveri & Cie. Drive and bearing for a rotor of an open-end spinning unit
JPS6148613A (en) * 1984-08-15 1986-03-10 Nippon Telegr & Teleph Corp <Ntt> Compound bearing
CA1295723C (en) * 1987-07-23 1992-02-11 Robert A. Golobic Gas bearings for gas lasers
SU1687660A1 (en) * 1989-06-05 1991-10-30 Научно-Производственное Объединение По Оборудованию Для Химических Волокон Drive of twisting member of textile machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0190440A2 (en) * 1985-02-04 1986-08-13 SKF Nova AB A device with a thrust bearing
JPS6421216A (en) * 1987-07-16 1989-01-24 Fanuc Ltd Pneumatic bearing electrically-driven motor
WO1992001096A1 (en) * 1990-07-10 1992-01-23 Skf Textilmaschinen-Komponenten Gmbh Drive and bearing for a shaftless open-end spinning rotor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 013, no. 194 (M-823), 10.Mai 1989 & JP 01 021216 A (FANUC LTD), 24.Januar 1989, *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0875685A2 (en) * 1997-04-28 1998-11-04 Ntn Corporation Combined externally pressurized gas-magnetic bearing assembly and spindle device utilizing the same
EP0875685A3 (en) * 1997-04-28 2000-04-19 Ntn Corporation Combined externally pressurized gas-magnetic bearing assembly and spindle device utilizing the same
US6288465B1 (en) 1997-04-28 2001-09-11 Ntn Corporation Combined externally pressurized gas-magnetic bearing assembly and spindle device utilizing the same
US6373156B2 (en) 1997-04-28 2002-04-16 Ntn Corporation Combined externally pressurized gas-magnetic bearing assembly and spindle device utilizing the same

Also Published As

Publication number Publication date
EP0765957A3 (en) 1997-07-09
JPH07507104A (en) 1995-08-03
DE4207673C1 (en) 1993-03-11
EP0630430A1 (en) 1994-12-28
US5570572A (en) 1996-11-05
WO1993018212A1 (en) 1993-09-16

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