EP3599298B1 - Open-end rotor spinning device - Google Patents

Open-end rotor spinning device Download PDF

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Publication number
EP3599298B1
EP3599298B1 EP19187696.0A EP19187696A EP3599298B1 EP 3599298 B1 EP3599298 B1 EP 3599298B1 EP 19187696 A EP19187696 A EP 19187696A EP 3599298 B1 EP3599298 B1 EP 3599298B1
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EP
European Patent Office
Prior art keywords
rotor
spinning
open
housing
pneumatic line
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.)
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Application number
EP19187696.0A
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German (de)
French (fr)
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EP3599298A1 (en
Inventor
Andreas Jakobinski
Lothar Winzen
Dr. Tai Mac
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
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Saurer Spinning Solutions GmbH and Co KG
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Publication of EP3599298A1 publication Critical patent/EP3599298A1/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
    • D01H4/30—Arrangements for separating slivers into fibres; Orienting or straightening fibres, e.g. using guide-rolls
    • D01H4/34—Arrangements for separating slivers into fibres; Orienting or straightening fibres, e.g. using guide-rolls using air-jet streams
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/14—Details
    • D01H1/16—Framework; Casings; Coverings ; Removal of heat; Means for generating overpressure of air against infiltration of dust; Ducts for electric cables

Definitions

  • the invention relates to an open-end rotor spinning device with a single-motor driven spinning rotor, the rotor cup of which rotates in a rotor housing which is closed by the cover element during the spinning process and is connected to a vacuum source via a pneumatic line.
  • the rotor housings of open-end rotor spinning devices are usually connected to a negative pressure source, for example, in the spinning machine itself, via a pneumatic line.
  • the individual fibers which are pneumatically fed into the rotating spinning rotor via the fiber guide channel due to the prevailing spinning negative pressure, are spun into a thread in the spinning rotor, which is then drawn off from the open-end rotor spinning device and wound onto a cross-wound bobbin.
  • the speed of the spinning rotors has been increased to well over 100,000 rpm.
  • the spinning elements, especially the spinning rotors significantly reduced in size in connection with open-end rotor spinning devices, but further developments were also made in the area of spinning rotor bearings.
  • an open-end rotor spinning device is described, the spinning rotor of which is driven by a single motor and whose rotor shaft is magnetically mounted in a contactless manner both axially and radially.
  • Each of the bearing points of the magnetic bearing arrangement has two axially spaced permanent magnet pairs, which are arranged in such a way that unequal magnetic poles face each other.
  • Open-end rotor spinning devices with individually driven, permanently magnetically mounted spinning rotors therefore often have additional vibration damping, as is the case, for example, in the EN 100 32 440 A1 is described.
  • a sensor system for detecting the respective radial position of the rotor shaft and an actuator system for correcting any incorrect positions of the rotor shaft are arranged in the area of the bearing points of the magnetic bearing arrangement.
  • Such magnetic bearing arrangements also have an electromagnetic center position control with at least one magnetic coil that can be energized in a defined manner, which ensures that the spinning rotor always maintains a predetermined axial center position during spinning.
  • an open-end rotor spinning device is described that is equipped with a specially designed cooling device.
  • an attempt is made to keep the climatic conditions in the area of the rotor spinning device as constant as possible and at an acceptable temperature level by exposing the rotor spinning device to two separate air streams during the spinning process.
  • This means that the rotor housing and the area of the spinning rotor bearing are connected to a cooling system of the textile machine via two separate pneumatic lines.
  • An open-end rotor spinning device which is equipped with a special cooling device, is also in the DE-AS 24 10 940 described.
  • this known open-end rotor spinning device both a sliver opening roller driven by a tangential belt and a spinning rotor are rotatably mounted within the rotor housing, which is connected to a vacuum source.
  • a cooling air flow enters the rotor housing through an air inlet opening, which is directed, among other things, onto a thread guide funnel, which is comparable in its function to a thread take-off nozzle. This means that the cooling air flow is intended to prevent thread damage in the area of the thread guide funnel due to frictional heat.
  • the installation space has a device for dissipating the heat generated in the installation space, which can either, as shown in Fig.1
  • a device for dissipating the heat generated in the installation space which can either, as shown in Fig.1
  • This patent application shows that it consists of an air inlet opening arranged in the bottom area of the installation space and an air outlet opening arranged in the upper area of the installation space or, as in Fig.2 shown, from an air inlet opening arranged in the floor area of the construction space and an opening arranged in the area of the support disk bearing of the spinning rotor through which air can be sucked out.
  • cooling devices described above have only been used in connection with open-end rotor spinning devices whose spinning rotors rotate at relatively low speeds.
  • these cooling devices have proven to be unusable for very fast spinning rotors, for example for spinning rotors that are equipped with an individual electric motor drive and are, for example, gas-dynamically or magnetically mounted.
  • Cooling devices for the storage and/or the single-motor drive of an open-end spinning rotor are also DE-OS 27 46 464 and the WO93/18212 known.
  • the DE-OS 27 46 464 describes, for example, an electric motor-driven individual drive for an open-end spinning rotor, which is mounted with its rotor shaft in gas-dynamically lubricated radial bearings.
  • the electric motor-driven individual drive of the spinning rotor is provided with air passage openings that extend over the entire length of the stator of the electric motor.
  • the spinning rotor has a fan-like design on its rear side and the housing of the individual drive forms a flow-optimized cavity in the area of the spinning rotor.
  • an air flow is initiated by the fan-like recesses of the rotating spinning rotor, which flows through the aforementioned air passage openings and cools the individual drive of the open-end spinning rotor.
  • an open-end rotor spinning device with a shaftless spinning rotor is known, which forms the rotor of an axial field motor.
  • the known device has a combined magnetic gas bearing and has means for cooling the stator and the magnetic gas bearing. This means that a cooling channel through which a cooling liquid flows is arranged in the area of a stator winding.
  • Such open-end rotor spinning devices that work with a combined magnetic gas bearing are characterized by very low friction losses due to their plane-parallel bearing surfaces and the radial force-free rotation of the spinning rotor mounted on them, but are extremely complex to manufacture and therefore expensive. In practice, such open-end rotor spinning devices have not yet been able to prevail.
  • the invention is based on the object of modifying an open-end rotor spinning device which is equipped with a spinning rotor which can be driven by an individual motor, the rotor cup of which rotates in a rotor housing which is closed by the cover element during the spinning process and is connected to a vacuum source via a pneumatic line, wherein the individual electromotive drive comprises a drive housing, in such a way that it is ensured that the heat generated by the drive of the spinning rotor during spinning operation is reliably dissipated.
  • the pneumatic line arranged between the rotor housing and the vacuum source is positioned in the area of the electromotive individual drive of the spinning rotor in such a way that the spinning vacuum initiated by the vacuum source ensures cooling of the individual drive of the spinning rotor via a suction air flow in the pneumatic line.
  • the pneumatic line is integrated into the drive housing of the electromotive individual drive and as a result the heat generated by the electromotive individual drive is transferred over a large area to the suction air flow and dissipated.
  • the embodiment according to the invention not only has the advantage that an optimal operating temperature of the spinning rotor drive is always ensured, but that even under unfavorable operating conditions, a high thermal load on the relatively heat-sensitive electronic components of the open-end rotor spinning device is reliably prevented.
  • the inventive design and arrangement of at least one pneumatic line acting as a cooling device ensures in a relatively simple manner that the spinning rotor drive and the electronic components of the open-end rotor spinning device are reliably protected from overheating under all operating conditions.
  • the individual electromotive drive comprises a drive housing.
  • a stator with electrical windings can be arranged in the drive housing.
  • the individual drive can also comprise an electrical rotor which is arranged in the drive housing and at the same time comprises the rotor shaft of the spinning rotor.
  • the pneumatic line is arranged in the area of the drive housing of the individual drive of the spinning rotor in such a way that the suction air flow reliably dissipates the heat generated by the individual drive.
  • the pneumatic line is integrated directly into the drive housing of the spinning rotor drive.
  • the drive housing with the integrated pneumatic line is preferably designed as a cast part. Such a design represents a relatively inexpensive component, especially when it is manufactured in large quantities.
  • the pneumatic line comprises several sub-lines and that the rotor housing is connected to the vacuum source via the several sub-lines.
  • the sub-lines are preferably evenly distributed in the circumferential direction of the rotor housing or the drive housing.
  • the rotor housing is connected to the vacuum source via three sub-lines of the pneumatic line, each offset by 120° from one another.
  • the three sub-lines can, for example, be integrated into the drive housing of the spinning rotor drive in a space-saving manner and designed in such a way that maximum heat dissipation takes place through the suction air flow inside the pneumatic line.
  • the pneumatic line is connected to the rotor housing via at least one inlet opening, which is arranged in the area of the rear wall of the rotor housing.
  • the rear wall of the rotor housing can have different shapes.
  • the rear wall of the rotor housing has a circular shape, for example.
  • the rear wall of the rotor housing has a lateral bulge in which the inlet opening for a pneumatic line is arranged.
  • a design is particularly advantageous if spinning rotor drives are to be subsequently equipped with a pneumatic line that functions as a cooling device. This means that by arranging the inlet opening in the area of a lateral bulge in the rear wall of the rotor housing, the pneumatic line can be positioned relatively easily in such a way that existing components on the spinning rotor drive can be easily bypassed.
  • connection of the pneumatic line is arranged in the outer wall of the rotor housing and the pneumatic line branches off radially from the rotor housing. In this way, the position of the pneumatic line or the positions of the pneumatic lines can be adapted relatively easily to the cross-section of the spinning rotor drive and/or interfering components can be bypassed.
  • the pneumatic line or one of its sub-lines has a curved, oval or slot-like cross-section.
  • Such a cross-section of the pneumatic line or sub-line has the advantage that the contact area between the pneumatic line or sub-line and the warm motor parts of the spinning rotor drive is relatively large and thus the heat transfer is very good, with the result that proper heat removal takes place through the suction air flow in the pneumatic line.
  • FIG.1 shows a side view of one half of an open-end rotor spinning machine 1, in particular a work station, which is equipped with an open-end rotor spinning device.
  • Open-end rotor spinning machines 1 of this type have, as is known, a plurality of such identical work stations 2, which are arranged next to one another in a row.
  • Such work stations 2 are each equipped with, among other things, an open-end rotor spinning device 3 and a winding device 4.
  • an open-end rotor spinning device 3 and a winding device 4.
  • a fiber sliver 6, which is presented in a spinning can 5 and prepared by a fiber sliver opening device 30, for example, is spun into a thread 7 in the open-end rotor spinning devices 3, which is then wound onto the winding device 4 to form a cross-wound bobbin 8.
  • the winding device 4 is equipped for this purpose with a bobbin frame 9 for rotatably holding an empty tube or a cross-wound bobbin 8, a bobbin drive roller 11 for frictionally driving the cross-wound bobbin 8 and with a thread traversing device 18.
  • the work station 2 also has a work station-specific suction nozzle 14 and a work station-specific piecing device 20. This means that such work stations 2 are largely self-sufficient and can automatically repair thread breaks if necessary.
  • Such open-end rotor spinning machines 1 are generally also equipped with a cross-wound bobbin transport device 12 for disposing of the cross-wound bobbins 8 finished on the winding devices 4 and often with a service unit 16 which is mounted on or on the open-end rotor spinning machine 1 on a guide rail 13 and a support rail 15 so that it can move.
  • Such service units 16 patrol along the work stations 2 of the open-end rotor spinning machine 1 and intervene automatically when there is a need for action at one of the work stations 2.
  • Such a need for action exists, for example, when a full cross-wound bobbin 8 has to be exchanged for a new empty tube at one of the work stations 2.
  • the open-end rotor spinning devices 3 of such Workplaces 2 each have, as shown below on the basis of the Figures 2 to 8 shown in more detail, via a rotor housing 10 which is connected to a vacuum source 23 via at least one pneumatic line 29 and in which the rotor cup 17 of a spinning rotor 19 rotates at high speed during spinning operation.
  • the spinning rotor 19 can be driven by a drive 21 as an individual motor and is mounted in a magnetic bearing device without contact.
  • Such driven and supported spinning rotors 19 are known in principle and are used, for example, in EP 0 972 868 A2 described in relatively great detail.
  • the rotor housing 10 shown in perspective view is preferably designed as a central, load-bearing component and is made of a metal with good thermal conductivity, for example aluminum.
  • the rotor housing 10 has bearing arms 27 which, for example, as in Fig.3 shown, are fastened by means of screw connections 28.
  • the bearing arms 27 each have a bearing device 26 at their ends, which forms a pivot axis 25 for a limitedly rotatable, replaceable cover element 22, which is equipped, among other things, with the fiber band opening device 30.
  • Such a fiber band opening device 30, which is shown in the Fig.1 and 2 is shown very schematically, has, for example, an opening roller driven by an individual motor for combing out the fiber sliver 6 provided as well as a fiber sliver feed cylinder, also driven by an individual motor, for transporting the fiber sliver 6.
  • the rotor housing 10 can be closed by the cover element 22 and is equipped on its rear side with an electric motor drive 21 for a spinning rotor 19.
  • the electric motor drive 21 is shown in Fig.2 only the drive housing 38 can be seen.
  • the electromotive individual drive 21 is also equipped with a magnetic bearing arrangement, which ensures contactless bearing of the spinning rotor 19, which rotates at a very high speed during spinning.
  • electronic components are also often installed, which ensure that the spinning rotor 19 operates properly.
  • the electronic components have, for example, the control electronics for the drive and bearing of the spinning rotor 19, i.e. the electronic components ensure that the spinning rotor 19 always rotates at a prescribed speed and without contact during spinning.
  • a so-called channel plate adapter is also arranged in an exchangeable manner, as is usual, which is equipped with a thread take-off nozzle 37 and the exit area of a fiber guide channel in the area of a tower-like extension 35.
  • the Fig.3 shows a rotor housing 10 in front view.
  • bearing arms 27 are attached to the rotor housing 10 by means of screw connections 28, each of which is equipped with a bearing device 26 at the end.
  • a replaceable cover element 22 is mounted so as to be able to rotate to a limited extent.
  • the rotor housing 10 also has a central recess 24 in which the rotor cup 17 of a spinning rotor 19 rotates at high speed during spinning.
  • the recess 24 is also connected to a vacuum source 23 via an inlet opening 34 to which a pneumatic line 29 is connected.
  • the inlet opening 34 for the pneumatic line 29 is arranged in the area of the round rear wall 33 of the rotor housing 10.
  • the cross section A 1 of the pneumatic line 29 is bent like an elongated hole.
  • the Fig.4 shows a rotor housing 10 in side view and in section.
  • the rotor housing 10 is shown with regard to the representation of the Fig.3 also rotated by 90° about its horizontal axis 36.
  • the rotor housing 10 has a recess 24 which can be closed by the cover element 22 if necessary.
  • the rotor cup 17 of a spinning rotor 19 rotates in the recess 24 at high speed.
  • An electric motor-driven individual drive 21 for the spinning rotor 19 is installed on the rear of the rotor housing 10, which, as is known, is equipped with a magnetic bearing arrangement (not shown).
  • the rotor housing 10 has an inlet opening 34 in the area of the rear wall 33, to which a pneumatic line 29 is connected, which is connected to a vacuum source 23.
  • the suction air flow initiated during spinning operation by the vacuum source 23 in the pneumatic line 29 ensures, on the one hand, that a sufficiently high spinning vacuum is present in the rotor housing 10; on the other hand, the suction air flow ensures that motor heat is dissipated and, as a result, the individual electromotive drive 21 of the spinning rotor 19 and the associated magnetic bearing arrangement is cooled.
  • the Fig.5 shows another possible embodiment of a rotor housing 10.
  • the rotor housing 10 is also equipped, as usual, with bearing arms 27, which are fastened, for example, by means of screw connections 28, and a central recess 24 for receiving the rotor cup 17 of a spinning rotor 19.
  • the back of the central recess 24 here has a lateral bulge 31 in which the inlet opening 34 for a pneumatic line 29 is arranged.
  • Such a design has the advantage that the pneumatic line 29 can, if necessary, for example if attachments of the spinning rotor drive or the magnetic bearing arrangement are in the way, also subsequently be easily positioned adjacent to these attachments.
  • Fig.6 is shown in side view and in section a further embodiment of a rotor housing 10.
  • the inlet opening 34 for the pneumatic line 29 is arranged in the area of the side wall 32 of the recess 24 of the rotor housing 10, i.e. in this embodiment the pneumatic line 29 branches off radially from the side wall 32 of the recess 24 of the rotor housing 10.
  • the pneumatic lines 29 comprise several sub-lines.
  • three sub-lines are connected to the recess 24 of the rotor housing 10.
  • the associated inlet openings 34 are located in the area of the rear wall 33 of the recess 24 of the rotor housing 10.
  • a vacuum source 23 connected to the sub-lines generates, as already described above, a suction air flow which not only provides the necessary spinning vacuum, but also forms a cooling device for the individual electric motor drive 21 of the spinning rotor 19.
  • Open-end rotor spinning machine 20 Piecing organ 2 place of work 21 single electric motor drive 3 Open-end rotor spinning device 22 Cover element 4 Winding device 23 Vacuum source 5 Spinning can 24 Recess 6 Sliver 25 Swivel axis 7 thread 26 Storage facility 8th Cross-wound bobbin 27 Bearing arm 9 Bobbin frame 28 Screw connection 10 Rotor housing 29 Pneumatic line 11 Coil drive roller 30 Sliver opening device 12 Cross-wound bobbin transport device 31 lateral bulge 13 Guide rail 32 Side wall 14 Suction nozzle 33 Back wall 15 Support rail 34 Inlet opening 16 Service unit 35 Approach 17 Rotor cup 36 Horizontal axis 18 Thread traversing device 37 Thread take-off nozzle 19 Spinning rotor 38 Drive housing

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

Description

Die Erfindung betrifft eine Offenend-Rotorspinnvorrichtung mit einem einzelmotorisch antreibbaren Spinnrotor, dessen Rotortasse in einem Rotorgehäuse umläuft, welches während des Spinnprozesses durch das Deckelelement verschlossen und über eine Pneumatikleitung an eine Unterdruckquelle angeschlossen ist.The invention relates to an open-end rotor spinning device with a single-motor driven spinning rotor, the rotor cup of which rotates in a rotor housing which is closed by the cover element during the spinning process and is connected to a vacuum source via a pneumatic line.

Wie bekannt, wird beim Betrieb von Offenend-Rotorspinnmaschinen, um einen ordnungsgemäßen Spinnprozess durchführen zu können, in den Offenend-Spinnvorrichtungen ein bestimmter Luftunterdruck benötigt, der in Fachkreisen als Spinnunterdruck bezeichnet wird. Das heißt, bei einer Offenend-Rotorspinnvorrichtung muss, um Einzelfasern, die jeweils durch eine so genannte Auflösewalze aus einem Vorlagefaserband ausgekämmt werden, über einen Faserleitkanal pneumatisch in einen rotierenden Spinnrotor der Offenend-Rotorspinnvorrichtung einspeisen zu können, im Bereich des Rotorgehäuses zwingend ein so genannter Spinnunterdruck gegeben sein. Aus diesem Grunde sind die Rotorgehäuse von Offenend-Rotorspinnvorrichtungen in der Regel jeweils über eine Pneumatikleitung an eine zum Beispiel spinnmaschineneigene Unterdruckquelle angeschlossen. Die aufgrund des herrschenden Spinnunterdruckes über den Faserleitkanal pneumatisch in den rotierenden Spinnrotor eingespeisten Einzelfasern werden im Spinnrotor zu einem Faden gesponnen, der anschließend aus der Offenend-Rotorspinnvorrichtung abgezogen und auf eine Kreuzspule aufgewickelt wird.As is known, when operating open-end rotor spinning machines, a certain negative air pressure is required in the open-end spinning devices in order to be able to carry out a proper spinning process. This is known in specialist circles as the spinning negative pressure. This means that in an open-end rotor spinning device, in order to be able to feed individual fibers, which are combed out of a feed fiber sliver by a so-called opening roller, pneumatically into a rotating spinning rotor of the open-end rotor spinning device via a fiber guide channel, a so-called spinning negative pressure must be present in the area of the rotor housing. For this reason, the rotor housings of open-end rotor spinning devices are usually connected to a negative pressure source, for example, in the spinning machine itself, via a pneumatic line. The individual fibers, which are pneumatically fed into the rotating spinning rotor via the fiber guide channel due to the prevailing spinning negative pressure, are spun into a thread in the spinning rotor, which is then drawn off from the open-end rotor spinning device and wound onto a cross-wound bobbin.

Um die Produktionsleistung derartiger Offenend-Rotorspinnmaschinen zu erhöhen sowie die Qualität der erzeugten Garne zu verbessern, sind im Laufe der Zeit an diesen Textilmaschinen immer wieder verschiedene Weiterentwicklungen durchgeführt worden.In order to increase the production output of such open-end rotor spinning machines and to improve the quality of the yarns produced, various further developments have been carried out on these textile machines over time.

Zur Steigerung der Produktionsleistung wurden beispielsweise die Drehzahlen der Spinnrotoren auf inzwischen weit über 100 000 U/min erhöht. Um derartige Drehzahlen realisieren zu können, waren im Zusammenhang mit Offenend-Rotorspinnvorrichtungen nicht nur deutliche Verkleinerungen der Spinnelemente, insbesondere der Spinnrotoren, notwendig, sondern es fanden auch Weiterentwicklungen auf dem Gebiet der Spinnrotorlagerung statt. In der Vergangenheit hat sich beispielsweise gezeigt, dass es sehr vorteilhaft ist, Spinnrotoren, die mit extrem hohen Drehzahlen rotieren sollen, einzelmotorisch anzutreiben und berührungslos in einer Magnetlageranordnung abzustützen und nicht, wie bislang üblich, über einen maschinenlangen, umlaufenden Tangentialriemen anzutreiben und in Stützscheibenlagerungen zu lagern.To increase production output, for example, the speed of the spinning rotors has been increased to well over 100,000 rpm. In order to achieve such speeds, not only were the spinning elements, especially the spinning rotors, significantly reduced in size in connection with open-end rotor spinning devices, but further developments were also made in the area of spinning rotor bearings. In the past, for example, it has been shown that it is very advantageous to drive spinning rotors that are to rotate at extremely high speeds with a single motor and to support them in a contactless magnetic bearing arrangement, rather than, as has been the case up to now, via a to drive a machine-length, rotating tangential belt and to store it in support disk bearings.

Solche einzelmotorisch angetriebenen, in Magnetlageranordnungen abgestützten Spinnrotoren sind bekannt und in zahlreichen Patentanmeldungen zum Teil ausführlich beschrieben.Such spinning rotors driven by individual motors and supported in magnetic bearing arrangements are known and are described in detail in numerous patent applications.

In der DE 100 22 736 A1 ist beispielsweise eine Offenend-Rotorspinnvorrichtung beschrieben, deren Spinnrotor einzelmotorisch angetrieben und mit seinem Rotorschaft sowohl axial als auch radial berührungslos magnetisch gelagert ist. Jede der Lagerstellen der Magnetlageranordnung weist dabei zwei axial beabstandet angeordnete Permanentmagnetpaare auf, die so angeordnet sind, dass sich jeweils ungleiche Magnetpole gegenüberstehen.In the DE 100 22 736 A1 For example, an open-end rotor spinning device is described, the spinning rotor of which is driven by a single motor and whose rotor shaft is magnetically mounted in a contactless manner both axially and radially. Each of the bearing points of the magnetic bearing arrangement has two axially spaced permanent magnet pairs, which are arranged in such a way that unequal magnetic poles face each other.

Derartige mit Permanentmagneten ausgestattete Magnetlageranordnungen erfordern gegenüber rein aktiv geregelten Magnetlagern einen deutlich geringeren Steuerungsaufwand, sind allerdings bezüglich ihrer radialen dynamischen Stabilität etwas sensibel. Das heißt, jede Anregung des Lagersystems führt, wenn keine entsprechenden Maßnahmen ergriffen werden, zu unerwünschten, nur verhältnismäßig schwach gedämpften radialen Schwingungen.Such magnetic bearing arrangements equipped with permanent magnets require significantly less control effort than purely actively controlled magnetic bearings, but are somewhat sensitive with regard to their radial dynamic stability. This means that any excitation of the bearing system leads to undesirable, only relatively weakly damped radial vibrations if no appropriate measures are taken.

Offenend-Rotorspinnvorrichtungen mit einzelmotorisch angetriebenen, permanentmagnetisch gelagerten Spinnrotoren verfügen deshalb oft über eine zusätzliche Schwingungsdämpfung, wie sie zum Beispiel in der DE 100 32 440 A1 beschrieben ist. Bei dieser bekannten Offenend-Rotorspinnvorrichtung ist im Bereich der Lagerstellen der Magnetlageranordnung eine Sensorik zum Detektieren der jeweiligen radialen Lage des Rotorschaftes sowie eine Aktorik zum Korrigieren eventueller Fehllagen des Rotorschaftes angeordnet. Solche Magnetlageranordnungen verfügen außerdem über eine elektromagnetische Mittenlageregelung mit wenigstens einer definiert bestrombaren Magnetspule, die dafür sorgt, dass der Spinnrotor während des Spinnbetriebes stets eine vorgegebene, axiale Mittenposition beibehält.Open-end rotor spinning devices with individually driven, permanently magnetically mounted spinning rotors therefore often have additional vibration damping, as is the case, for example, in the EN 100 32 440 A1 is described. In this known open-end rotor spinning device, a sensor system for detecting the respective radial position of the rotor shaft and an actuator system for correcting any incorrect positions of the rotor shaft are arranged in the area of the bearing points of the magnetic bearing arrangement. Such magnetic bearing arrangements also have an electromagnetic center position control with at least one magnetic coil that can be energized in a defined manner, which ensures that the spinning rotor always maintains a predetermined axial center position during spinning.

Bei diesen an sich bewährenden, mit einzelmotorisch angetriebenen und magnetisch gelagerten Spinnrotoren ausgestatteten Offenend-Rotorspinnvorrichtungen besteht allerdings die Gefahr, dass es bei ungünstigen Betriebsbedingungen aufgrund der Wärmeabstrahlung der elektromotorischen Einzelantriebe der Spinnrotoren zur Bildung so genannter Wärmenester kommen kann.However, with these otherwise proven open-end rotor spinning devices equipped with individually motor-driven and magnetically mounted spinning rotors, there is a risk that under unfavourable operating conditions, so-called hot spots can form due to the heat radiation from the individual electromotive drives of the spinning rotors.

Da solche Wärmenester, insbesondere wenn eine bestimmte Temperatur überschritten wird, keinesfalls vorteilhaft sind und beispielsweise zu Schäden an den elektronischen Baugruppen der Magnetlageranordnung führen können, hat man in der Vergangenheit bereits verschiedene Versuche unternommen bzw. diverse Einrichtungen entwickelt, mit denen die Entstehung solcher Wärmenester verhindert werden soll.Since such hot spots are by no means advantageous, especially when a certain temperature is exceeded, and can, for example, lead to damage to the electronic components of the magnetic bearing arrangement, various attempts have already been made in the past and various devices have been developed to prevent the formation of such hot spots.

Im Zusammenhang mit der Wärmeregulierung an Offenend-Rotorspinnvorrichtungen sind verschiedene Einrichtungen bekannt, mit denen versucht wurde, die im Bereich von Offenend-Rotorspinnvorrichtungen entstehende Wärmeenergie möglichst wirkungsvoll abzuführen.In connection with the heat regulation on open-end rotor spinning devices, various devices are known with which attempts have been made to dissipate the heat energy generated in the area of open-end rotor spinning devices as effectively as possible.

In der DE-OS 21 59 120 ist beispielsweise eine Offenend-Rotorspinnvorrichtung beschrieben, die mit einer speziell ausgebildeten Kühlvorrichtung ausgestattet ist. Bei dieser bekannten Offenend-Rotorspinnvorrichtung wird versucht, die klimatischen Bedingungen im Bereich der Rotorspinnvorrichtung dadurch weitestgehend konstant und auf einem vertretbaren Temperaturniveau zu halten, das die Rotorspinnvorrichtung während des Spinnprozesses durch zwei getrennte Luftströme beaufschlagt wird. Das heißt, das Rotorgehäuse und der Bereich der Spinnrotorlagerung sind über zwei separate Pneumatikleitungen an ein Kühlsystem der Textilmaschine angeschlossen.In the DE-OS 21 59 120 For example, an open-end rotor spinning device is described that is equipped with a specially designed cooling device. In this known open-end rotor spinning device, an attempt is made to keep the climatic conditions in the area of the rotor spinning device as constant as possible and at an acceptable temperature level by exposing the rotor spinning device to two separate air streams during the spinning process. This means that the rotor housing and the area of the spinning rotor bearing are connected to a cooling system of the textile machine via two separate pneumatic lines.

Eine Offenend-Rotorspinnvorrichtung, die mit einer speziellen Kühlvorrichtung ausgestattet ist, ist auch in der DE-AS 24 10 940 beschrieben. Bei dieser bekannten Offenend-Rotorspinnvorrichtung sind innerhalb des Rotorgehäuses, das an eine Unterdruckquelle angeschlossen ist, sowohl eine durch einen Tangentialriemen angetriebene Faserband-Auflösewalze, als auch ein Spinnrotor rotierbar gelagert. Während des Spinnprozesses tritt durch eine Lufteintrittsöffnung ein Kühlluftstrom in das Rotorgehäuse ein, der unter anderem auf einen Fadenführungstrichter gerichtet ist, welcher in seiner Funktion mit einer Fadenabzugsdüse vergleichbar ist. Das heißt, durch den Kühlluftstrom soll verhindert werden, dass es im Bereich des Fadenführungstrichters aufgrund von auftretender Reibungswärme zu Fadenschädigungen kommen kann.An open-end rotor spinning device, which is equipped with a special cooling device, is also in the DE-AS 24 10 940 described. In this known open-end rotor spinning device, both a sliver opening roller driven by a tangential belt and a spinning rotor are rotatably mounted within the rotor housing, which is connected to a vacuum source. During the spinning process, a cooling air flow enters the rotor housing through an air inlet opening, which is directed, among other things, onto a thread guide funnel, which is comparable in its function to a thread take-off nozzle. This means that the cooling air flow is intended to prevent thread damage in the area of the thread guide funnel due to frictional heat.

In der DE 10 2005 045 420 A1 ist eine Offenend-Rotorspinnvorrichtung beschrieben, bei der die als Stützscheibenlagerung ausgebildete Lagereinrichtung eines durch einen umlaufenden Tangentialriemen angetriebenen Spinnrotors in einem weitestgehend geschlossenen Bauraum angeordnet ist.In the EN 10 2005 045 420 A1 An open-end rotor spinning device is described in which the bearing device, designed as a support disk bearing, of a spinning rotor driven by a rotating tangential belt is arranged in a largely closed installation space.

Der Bauraum weist dabei eine Einrichtung zur Abfuhr der im Bauraum entstehenden Wärme auf, die entweder, wie aus Fig. 1 dieser Patentanmeldung ersichtlich, aus einer im Bodenbereich des Bauraumes angeordneten Lufteinlassöffnung und einer im Oberbereich des Bauraumes angeordneten Luftauslassöffnung besteht oder, wie in Fig. 2 dargestellt, aus einer im Bodenbereich des Bauraumes angeordneten Lufteinlassöffnung und einer im Bereich der Stützscheibenlagerung des Spinnrotors angeordneten Öffnung, durch die Luft abgesaugt werden kann.The installation space has a device for dissipating the heat generated in the installation space, which can either, as shown in Fig.1 This patent application shows that it consists of an air inlet opening arranged in the bottom area of the installation space and an air outlet opening arranged in the upper area of the installation space or, as in Fig.2 shown, from an air inlet opening arranged in the floor area of the construction space and an opening arranged in the area of the support disk bearing of the spinning rotor through which air can be sucked out.

Die vorstehend beschriebenen Kühleinrichtungen sind allerdings nur im Zusammenhang mit Offenend-Rotorspinnvorrichtungen, deren Spinnrotoren mit relativ niedrigen Drehzahlen rotieren, zum Einsatz gekommen. Für sehr schnelllaufende Spinnrotoren, beispielsweise für Spinnrotoren, die mit einem elektromotorischen Einzelantrieb ausgestattet und zum Beispiel gasdynamisch oder magnetisch gelagert sind, haben sich diese Kühleinrichtungen allerdings als unbrauchbar erwiesen.However, the cooling devices described above have only been used in connection with open-end rotor spinning devices whose spinning rotors rotate at relatively low speeds. However, these cooling devices have proven to be unusable for very fast spinning rotors, for example for spinning rotors that are equipped with an individual electric motor drive and are, for example, gas-dynamically or magnetically mounted.

Kühleinrichtungen für die Lagerung und/oder den einzelmotorischen Antrieb eines Offenend-Spinnrotors, sind allerdings auch durch die DE-OS 27 46 464 und die WO 93/18212 bekannt.Cooling devices for the storage and/or the single-motor drive of an open-end spinning rotor, however, are also DE-OS 27 46 464 and the WO93/18212 known.

Die DE-OS 27 46 464 beschreibt beispielsweise einen elektromotorischen Einzelantrieb für einen Offenend-Spinnrotor, der mit seinem Rotorschaft in gasdynamisch geschmierten Radiallagern gelagert ist. Der elektromotorische Einzelantrieb des Spinnrotors ist mit Luftdurchtrittsöffnungen versehen, die sich über die gesamte Länge des Stators des Elektromotors erstrecken. Außerdem weist der Spinnrotor auf seiner Rückseite eine ventilatorartige Ausbildung auf und das Gehäuse des Einzelantriebes bildet im Bereich des Spinnrotors einen strömungsgünstigen Hohlraum. Während des Spinnbetriebes wird durch die ventilatorartigen Vertiefungen des umlaufenden Spinnrotors ein Luftstrom initiiert, der durch die vorgenannten Luftdurchtrittsöffnungen strömt und dabei den Einzelantrieb des Offenend-Spinnrotors kühlt. Eine solche spezielle Ausbildung des Spinnrotors, insbesondere dessen zusätzliche Funktion als Ventilator, der einen Kühlluftstrom erzeugt, hat allerdings den Nachteil, dass die Drehzahlen, die mit derartig ausgebildeten Spinnrotorantrieben erzielbar sind, sehr begrenzt sind. Das heißt, auch dieser bekannte elektromotorische Spinnrotor-Einzelantrieb ist für moderne Offenend-Rotorspinnvorrichtungen nicht brauchbar.The DE-OS 27 46 464 describes, for example, an electric motor-driven individual drive for an open-end spinning rotor, which is mounted with its rotor shaft in gas-dynamically lubricated radial bearings. The electric motor-driven individual drive of the spinning rotor is provided with air passage openings that extend over the entire length of the stator of the electric motor. In addition, the spinning rotor has a fan-like design on its rear side and the housing of the individual drive forms a flow-optimized cavity in the area of the spinning rotor. During spinning operation, an air flow is initiated by the fan-like recesses of the rotating spinning rotor, which flows through the aforementioned air passage openings and cools the individual drive of the open-end spinning rotor. Such a special design of the spinning rotor, in particular its additional function as a fan that generates a cooling air flow, has the disadvantage, however, that the speeds that can be achieved with spinning rotor drives designed in this way are very limited. This means that this well-known electromotive spinning rotor single drive is also not suitable for modern open-end rotor spinning devices.

Durch die WO 93/18212 ist des Weiteren eine Offenend-Rotorspinnvorrichtung mit einem schaftlosen Spinnrotor bekannt, der den Läufer eines Axialfeldmotors bildet.Through the WO93/18212 Furthermore, an open-end rotor spinning device with a shaftless spinning rotor is known, which forms the rotor of an axial field motor.

Die bekannte Vorrichtung verfügt über ein kombiniertes Magnet-Gaslager und weist Mittel zur Kühlung des Stators und des Magnet-Gaslagers auf. Das heißt, im Bereich einer Statorwicklung ist ein von einer Kühlflüssigkeit durchströmter Kühlkanal angeordnet. Derartige mit einem kombinierten Magnet-Gaslager arbeitende Offenend-Rotorspinnvorrichtungen zeichnen sich aufgrund ihrer planparallelen Lagerflächen und der radialkraftfreien Rotation des darauf gelagerten Spinnrotors zwar durch sehr niedrige Reibungsverluste aus, sind in der Herstellung allerdings extrem aufwendig und damit teuer. In der Praxis konnten sich derartige Offenend-Rotorspinnvorrichtungen bislang nicht durchsetzen.The known device has a combined magnetic gas bearing and has means for cooling the stator and the magnetic gas bearing. This means that a cooling channel through which a cooling liquid flows is arranged in the area of a stator winding. Such open-end rotor spinning devices that work with a combined magnetic gas bearing are characterized by very low friction losses due to their plane-parallel bearing surfaces and the radial force-free rotation of the spinning rotor mounted on them, but are extremely complex to manufacture and therefore expensive. In practice, such open-end rotor spinning devices have not yet been able to prevail.

Ausgehend vom vorgenannten Stand der Technik liegt der Erfindung die Aufgabe zugrunde, eine Offenend-Rotorspinnvorrichtung, die mit einem einzelmotorisch antreibbaren Spinnrotor ausgestattet ist, dessen Rotortasse in einem Rotorgehäuse umläuft, welches während des Spinnprozesses durch das Deckelelement verschlossen und über eine Pneumatikleitung an eine Unterdruckquelle angeschlossen ist, wobei der elektromotorische Einzelantrieb ein Antriebsgehäuse umfasst, dahingehend zu modifizieren, dass sichergestellt ist, dass die während des Spinnbetriebes vom Antrieb des Spinnrotors erzeugte Wärme zuverlässig abgeführt wird.Based on the aforementioned prior art, the invention is based on the object of modifying an open-end rotor spinning device which is equipped with a spinning rotor which can be driven by an individual motor, the rotor cup of which rotates in a rotor housing which is closed by the cover element during the spinning process and is connected to a vacuum source via a pneumatic line, wherein the individual electromotive drive comprises a drive housing, in such a way that it is ensured that the heat generated by the drive of the spinning rotor during spinning operation is reliably dissipated.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass die zwischen Rotorgehäuse und Unterdruckquelle angeordnete Pneumatikleitung im Bereich des elektromotorischen Einzelantriebs des Spinnrotors so positioniert ist, dass der durch die Unterdruckquelle initiierte Spinnunterdruck über eine in der Pneumatikleitung anstehende Saugluftströmung für eine Kühlung des Einzelantriebes des Spinnrotors sorgt. Erfindungsgemäß ist die Pneumatikleitung in das Antriebsgehäuse des elektromotorischen Einzelantriebs integriert und dadurch wird die vom elektromotorischen Einzelantriebs erzeugte Wärme flächig an die Saugluftströmung übertragen und abgeführt wird.This object is achieved according to the invention in that the pneumatic line arranged between the rotor housing and the vacuum source is positioned in the area of the electromotive individual drive of the spinning rotor in such a way that the spinning vacuum initiated by the vacuum source ensures cooling of the individual drive of the spinning rotor via a suction air flow in the pneumatic line. According to the invention, the pneumatic line is integrated into the drive housing of the electromotive individual drive and as a result the heat generated by the electromotive individual drive is transferred over a large area to the suction air flow and dissipated.

Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Advantageous embodiments of the invention are the subject of the subclaims.

Die erfindungsgemäße Ausführungsform hat nicht nur den Vorteil, dass stets eine optimale Betriebstemperatur des Spinnrotorantriebs gewährleistet ist, sondern dass auch unter ungünstigen Betriebsbedingungen zuverlässig verhindert wird, dass es zu einer hohen thermischen Belastung der relativ wärmeempfindlichen elektronischen Baugruppen der Offenend-Rotorspinnvorrichtung kommen kann. Das bedeutet, durch die erfindungsgemäße Ausbildung und Anordnung wenigstens einer als Kühleinrichtung fungierenden Pneumatikleitung wird auf relativ einfache Weise sichergestellt, dass der Spinnrotorantrieb sowie die elektronischen Baugruppen der Offenend-Rotorspinnvorrichtung bei allen Betriebsbedingungen sicher vor Überhitzung geschützt sind.The embodiment according to the invention not only has the advantage that an optimal operating temperature of the spinning rotor drive is always ensured, but that even under unfavorable operating conditions, a high thermal load on the relatively heat-sensitive electronic components of the open-end rotor spinning device is reliably prevented. This means that the inventive design and arrangement of at least one pneumatic line acting as a cooling device ensures in a relatively simple manner that the spinning rotor drive and the electronic components of the open-end rotor spinning device are reliably protected from overheating under all operating conditions.

Der elektromotorische Einzelantrieb umfasst ein Antriebsgehäuse. In dem Antriebsgehäuse kann ein Stator mit elektrischen Wicklungen angeordnet. Weiter kann der Einzelantrieb einen elektrischen Läufer umfassen, der in dem Antriebsgehäuse angeordnet ist und gleichzeitig den Rotorschaft des Spinnrotors umfasst.The individual electromotive drive comprises a drive housing. A stator with electrical windings can be arranged in the drive housing. The individual drive can also comprise an electrical rotor which is arranged in the drive housing and at the same time comprises the rotor shaft of the spinning rotor.

Erfindungsgemäß ist dabei vorgesehen, dass die Pneumatikleitung so im Bereich des Antriebsgehäuses des Einzelantriebes des Spinnrotors angeordnet ist, dass durch die Saugluftströmung eine zuverlässige Abfuhr der durch den Einzelantrieb erzeugten Wärme stattfindet. Das bedeutet, durch die vorstehend beschriebene, vorteilhafte Ausbildung wird auf einfache Weise gewährleistet, dass die während des Spinnbetriebes durch den Spinnrotorantrieb erzeugte Wärme sofort abgeführt wird, mit der Folge, dass eine unzulässige Erwärmung der Offenend-Rotorspinnvorrichtung zuverlässig verhindert wird.According to the invention, the pneumatic line is arranged in the area of the drive housing of the individual drive of the spinning rotor in such a way that the suction air flow reliably dissipates the heat generated by the individual drive. This means that the advantageous design described above ensures in a simple manner that the heat generated by the spinning rotor drive during spinning operation is immediately dissipated, with the result that impermissible heating of the open-end rotor spinning device is reliably prevented.

Erfindungsgemäß ist dabei vorgesehen, dass die Pneumatikleitung direkt in das Antriebsgehäuse des Spinnrotorantriebes integriert ist. Durch die Integration der Pneumatikleitung in das Antriebsgehäuse wird auf relativ einfache Weise sichergestellt, dass die vom Spinnrotorantrieb erzeugte Wärme großflächig an die Saugluftströmung übertragen und damit vorschriftsmäßig abgeführt wird. Das Antriebsgehäuse mit der integrierten Pneumatikleitung ist vorzugsweise als Gussteil ausgebildet. Eine solche Ausbildung stellt, insbesondere, wenn sie in größeren Stückzahlen gefertigt wird, ein relativ kostengünstiges Bauteil dar.According to the invention, the pneumatic line is integrated directly into the drive housing of the spinning rotor drive. By integrating the pneumatic line into the drive housing, it is ensured in a relatively simple manner that the heat generated by the spinning rotor drive is transferred to the suction air flow over a large area and is thus dissipated in accordance with regulations. The drive housing with the integrated pneumatic line is preferably designed as a cast part. Such a design represents a relatively inexpensive component, especially when it is manufactured in large quantities.

In einer vorteilhaften Ausführungsform ist vorgesehen, dass die Pneumatikleitung mehrere Teilleitungen umfasst und dass das Rotorgehäuse über die mehreren Teilleitungen an die Unterdruckquelle angeschlossen ist. Vorzugsweise sind die Teilleitungen in Umfangsrichtung des Rotorgehäuses beziehungsweise des Antriebsgehäuses gleichmäßig verteilt. Gemäß einer bevorzugten Weiterbildung ist das Rotorgehäuse über drei jeweils um 120° zu einander versetzt angeordnete Teilleitungen der Pneumatikleitung an die Unterdruckquelle angeschlossen ist. Eine solche Anordnung gewährleistet eine sehr gleichmäßige Abführung der durch den Spinnrotorantrieb erzeugten Wärme und damit eine sehr gute Kühlung des Spinnrotorantriebes. Das heißt, durch eine solche Ausbildung wird die Entstehung eventueller Wärmenester zuverlässig verhindert. Die drei jeweils um 120° zu einander versetzt angeordneten Teilleitungen können beispielsweise platzsparend in das Antriebsgehäuse des Spinnrotorantriebes integriert und so ausgebildet sein, dass durch den Saugluftstrom im Inneren der Pneumatikleitung ein maximaler Wärmeabtransport stattfindet.In an advantageous embodiment, it is provided that the pneumatic line comprises several sub-lines and that the rotor housing is connected to the vacuum source via the several sub-lines. The sub-lines are preferably evenly distributed in the circumferential direction of the rotor housing or the drive housing. According to a preferred development, the rotor housing is connected to the vacuum source via three sub-lines of the pneumatic line, each offset by 120° from one another. Such an arrangement ensures very even dissipation of the heat generated by the spinning rotor drive and thus very good cooling of the spinning rotor drive. This means that such a design reliably prevents the formation of any hot spots. The three sub-lines, each offset by 120° from one another, can, for example, be integrated into the drive housing of the spinning rotor drive in a space-saving manner and designed in such a way that maximum heat dissipation takes place through the suction air flow inside the pneumatic line.

In vorteilhafter Ausführungsform ist des Weiteren vorgesehen, dass die Pneumatikleitung über mindestens eine Einlassöffnung an das Rotorgehäuse angeschlossen ist, die im Bereich der Rückwand des Rotorgehäuses angeordnet ist. Durch eine solche Positionierung der Einlassöffnung der Pneumatikleitung wird sichergestellt, dass der Spinnbetrieb keinesfalls durch ungünstige Strömungsverhältnisse innerhalb des Rotorgehäuses negativ beeinflusst wird. Die Anordnung der Einlassöffnung in der Rückwand des Rotorgehäuses führt vielmehr zu relativ geringen Umlenkungen der Saugluftströmung, so dass die auftretenden Strömungsverluste relativ gering sind. Bei der Ausbildung der Pneumatikleitung mit mehreren Teilleitungen ist vorzugsweise jede Teilleitung über eine eigene Einlassöffnung an das Rotorgehäuse angeschlossen.In an advantageous embodiment, it is further provided that the pneumatic line is connected to the rotor housing via at least one inlet opening, which is arranged in the area of the rear wall of the rotor housing. By positioning the inlet opening of the pneumatic line in this way, it is ensured that the spinning operation is in no way negatively influenced by unfavorable flow conditions within the rotor housing. The arrangement of the inlet opening in the rear wall of the rotor housing rather leads to relatively small deflections of the suction air flow, so that the flow losses that occur are relatively low. When the pneumatic line is designed with several sub-lines, each sub-line is preferably connected to the rotor housing via its own inlet opening.

Die Rückwand des Rotorgehäuses kann dabei verschiedene Formen aufweisen. In einer ersten vorteilhaften Ausführungsform weist die Rückwand des Rotorgehäuses beispielsweise eine kreisrunde Form auf. Durch eine solche, an die Form des Spinnrotorantriebs angepasste Ausbildung der Rückwand des Rotorgehäuses kann, insbesondere, wenn die Pneumatikleitung mehrere Teilleitungen aufweist, eine optimale Wärmeabfuhr gewährleistet werden, da die Teilleitungen in unmittelbarer Nähe der wärmeerzeugenden Motorbauteile positioniert sind.The rear wall of the rotor housing can have different shapes. In a first advantageous embodiment, the rear wall of the rotor housing has a circular shape, for example. By designing the rear wall of the rotor housing in this way, adapted to the shape of the spinning rotor drive, optimal heat dissipation can be ensured, particularly if the pneumatic line has several sub-lines, since the sub-lines are positioned in the immediate vicinity of the heat-generating motor components.

In einer weiteren, alternativen Ausführungsform ist vorgesehen, dass die Rückwand des Rotorgehäuses eine seitliche Ausbuchtung aufweist, in der die Einlassöffnung für eine Pneumatikleitung angeordnet ist. Eine solche Ausbildung ist insbesondere dann vorteilhaft, wenn Spinnrotorantriebe nachträglich mit einer als Kühleinrichtung fungierenden Pneumatikleitung ausgerüstet werden sollen. Das bedeutet, durch die Anordnung der Einlassöffnung im Bereich einer seitlichen Ausbuchtung der Rückwand des Rotorgehäuses kann die Pneumatikleitung relativ einfach so positioniert werden, dass am Spinnrotorantrieb bereits vorhandene Bauteile problemlos umgangen werden können.In a further, alternative embodiment, the rear wall of the rotor housing has a lateral bulge in which the inlet opening for a pneumatic line is arranged. Such a design is particularly advantageous if spinning rotor drives are to be subsequently equipped with a pneumatic line that functions as a cooling device. This means that by arranging the inlet opening in the area of a lateral bulge in the rear wall of the rotor housing, the pneumatic line can be positioned relatively easily in such a way that existing components on the spinning rotor drive can be easily bypassed.

In einer weiteren, alternativen Ausführungsform kann allerdings auch vorgesehen sein, dass der Anschluss der Pneumatikleitung in der Außenwandung des Rotorgehäuses angeordnet und die Pneumatikleitung radial vom Rotorgehäuse abzweigt. Auf diese Weise kann die Lage der Pneumatikleitung bzw. können die Lagen der Pneumatikleitungen relativ problemlos an den Querschnitt des Spinnrotorantriebes angepasst und/oder störende Bauteile umgangen werden.In a further, alternative embodiment, however, it can also be provided that the connection of the pneumatic line is arranged in the outer wall of the rotor housing and the pneumatic line branches off radially from the rotor housing. In this way, the position of the pneumatic line or the positions of the pneumatic lines can be adapted relatively easily to the cross-section of the spinning rotor drive and/or interfering components can be bypassed.

Vorzugsweise weist die Pneumatikleitung oder eine ihrer Teilleitungen einen gebogenen, ovalen oder langlochartigen Querschnitt auf. Ein solcher Querschnitt der Pneumatikleitung oder der Teilleitung hat dabei den Vorteil, dass die Kontaktfläche zwischen der Pneumatikleitung oder der Teilleitung und den warmen Motorteilen des Spinnrotorantriebes relativ groß und damit der Wärmeübergang sehr gut ist, mit der Folge, dass durch die in der Pneumatikleitung fließende Saugluftströmung ein ordnungsgemäßer Wärmeabtransport stattfindet.Preferably, the pneumatic line or one of its sub-lines has a curved, oval or slot-like cross-section. Such a cross-section of the pneumatic line or sub-line has the advantage that the contact area between the pneumatic line or sub-line and the warm motor parts of the spinning rotor drive is relatively large and thus the heat transfer is very good, with the result that proper heat removal takes place through the suction air flow in the pneumatic line.

Weitere Einzelheiten der Erfindung sind den nachfolgend anhand der Zeichnungen dargestellten Ausführungsbeispielen entnehmbar.Further details of the invention can be taken from the embodiments presented below with reference to the drawings.

Es zeigt:

Fig. 1
schematisch in Seitenansicht eine Hälfte einer Offenend-Rotorspinnmaschine, mit einer Arbeitsstelle, die mit einer Offenend-Rotorspinnvorrichtung ausgestattet ist,
Fig. 2
in perspektivischer Darstellung eine nicht erfindungsgemäß ausgebildete Offenend-Rotorspinnvorrichtung, mit einem Rotorgehäuse, das über eine Pneumatikleitung so an eine Unterdruckquelle angeschlossen ist, dass die Pneumatikleitung eine Kühleinrichtung für die Offenend-Rotorspinnvorrichtung bildet,
Fig. 3
schematisch in Vorderansicht ein Rotorgehäuse, dessen runde Rückwand mit einer Einlassöffnung für eine Pneumatikleitung ausgestattet ist,
Fig. 4
in Seitenansicht sowie im Schnitt, ein Rotorgehäuse mit einem angeschlossenen Spinnrotorantrieb sowie einer in die Rückwand des Rotorgehäuses mündenden, mit einer Unterdruckquelle verbundenen Pneumatikleitung,
Fig. 5
schematisch in Vorderansicht ein Rotorgehäuse, dessen Rückwand eine seitliche Ausbuchtung aufweist, in der die Einlassöffnung einer Pneumatikleitung angeordnet ist,
Fig. 6
in Seitenansicht sowie im Schnitt eine weitere Ausführungsform des Rotorgehäuses, mit einer radial abzweigenden Pneumatikleitung,
Fig. 7
schematisch in Vorderansicht ein Rotorgehäuse, dessen runde Rückwand mit drei jeweils 120° zu einander versetzt angeordneten Einlassöffnungen für eine Pneumatikleitung ausgestattet ist,
Fig. 8
das Rotorgehäuse mit Spinnrotorantrieb gemäß Fig. 7 in perspektivischer Ansicht.
It shows:
Fig.1
schematic side view of one half of an open-end rotor spinning machine, with a work station equipped with an open-end rotor spinning device,
Fig.2
in perspective view an open-end rotor spinning device not designed according to the invention, with a rotor housing which is connected to a vacuum source via a pneumatic line in such a way that the pneumatic line forms a cooling device for the open-end rotor spinning device,
Fig.3
schematic front view of a rotor housing whose round rear wall is equipped with an inlet opening for a pneumatic line,
Fig.4
in side view and in section, a rotor housing with a connected spinning rotor drive and a pneumatic line leading into the rear wall of the rotor housing and connected to a vacuum source,
Fig.5
schematically in front view a rotor housing, the rear wall of which has a lateral bulge in which the inlet opening of a pneumatic line is arranged,
Fig.6
in side view and in section another embodiment of the rotor housing, with a radially branching pneumatic line,
Fig.7
schematic front view of a rotor housing, the round rear wall of which is equipped with three inlet openings for a pneumatic line, each arranged 120° apart,
Fig.8
the rotor housing with spinning rotor drive according to Fig.7 in perspective view.

In Fig. 1 ist in Seitenansicht eine Hälfte einer Offenend-Rotorspinnmaschine 1, insbesondere eine Arbeitsstelle dargestellt, die mit einer Offenend-Rotorspinnvorrichtung ausgestattet ist. Derartige Offenend-Rotorspinnmaschinen 1 weisen, wie bekannt, eine Vielzahl solcher identischer Arbeitsstellen 2 auf, die in Reihe nebeneinander angeordnet sind.In Fig.1 shows a side view of one half of an open-end rotor spinning machine 1, in particular a work station, which is equipped with an open-end rotor spinning device. Open-end rotor spinning machines 1 of this type have, as is known, a plurality of such identical work stations 2, which are arranged next to one another in a row.

Derartige Arbeitsstellen 2 sind unter anderem jeweils mit einer Offenend-Rotorspinnvorrichtung 3 sowie einer Spuleinrichtung 4 ausgerüstet. Das heißt, während des Betriebes wird in den Offenend-Rotorspinnvorrichtungen 3 ein zum Beispiel jeweils in einer Spinnkanne 5 vorgelegtes, durch eine Faserband-Auflöseeinrichtung 30 vorbereitetes Faserband 6 zu einem Faden 7 gesponnen, der anschließend auf der Spuleinrichtung 4 zu einer Kreuzspule 8 aufgewickelt wird.Such work stations 2 are each equipped with, among other things, an open-end rotor spinning device 3 and a winding device 4. This means that during operation, a fiber sliver 6, which is presented in a spinning can 5 and prepared by a fiber sliver opening device 30, for example, is spun into a thread 7 in the open-end rotor spinning devices 3, which is then wound onto the winding device 4 to form a cross-wound bobbin 8.

Wie in Fig. 1 dargestellt, ist die Spuleinrichtung 4 zu diesem Zweck mit einem Spulenrahmen 9 zum drehbaren Haltern einer Leerhülse, beziehungsweise einer Kreuzspule 8, einer Spulenantriebswalze 11 zum reibschlüssigen Antreiben der Kreuzspule 8 sowie mit einer Fadenchangiereinrichtung 18 ausgestattet. Im Ausführungsbeispiel verfügt die Arbeitsstelle 2 des Weiteren über eine arbeitsstelleneigene Saugdüse 14 sowie über ein arbeitsstelleneigenes Anspinnorgan 20. Das bedeutet, solche Arbeitsstellen 2 sind weitestgehend autark und können im Bedarfsfall Fadenbrüche selbsttätig beheben.As in Fig.1 As shown, the winding device 4 is equipped for this purpose with a bobbin frame 9 for rotatably holding an empty tube or a cross-wound bobbin 8, a bobbin drive roller 11 for frictionally driving the cross-wound bobbin 8 and with a thread traversing device 18. In the exemplary embodiment, the work station 2 also has a work station-specific suction nozzle 14 and a work station-specific piecing device 20. This means that such work stations 2 are largely self-sufficient and can automatically repair thread breaks if necessary.

Solche Offenend-Rotorspinnmaschinen 1 sind in der Regel außerdem mit einer Kreuzspulentransporteinrichtung 12 zum Entsorgen der auf den Spuleinrichtungen 4 fertiggestellten Kreuzspulen 8 sowie oft mit einem Serviceaggregat 16 ausgestattet, das an beziehungsweise auf der Offenend-Rotorspinnmaschine 1 an einer Führungsschiene 13 und einer Stützschiene 15 verfahrbar gelagert ist. Derartige Serviceaggregate 16 patrouillieren entlang der Arbeitsstellen 2 der Offenend-Rotorspinnmaschine 1 und greifen selbsttätig ein, wenn an einer der Arbeitsstellen 2 ein Handlungsbedarf entsteht. Ein solcher Handlungsbedarf liegt beispielsweise vor, wenn an einer der Arbeitsstellen 2 eine volle Kreuzspule 8 gegen eine neue Leerhülse getauscht werden muss. Die Offenend-Rotorspinnvorrichtungen 3 derartiger Arbeitsstellen 2 verfügen jeweils, wie nachfolgend anhand der Figuren 2 bis 8 näher dargestellt, über ein Rotorgehäuse 10, das über wenigstens eine Pneumatikleitung 29 an eine Unterdruckquelle 23 angeschlossen ist und in dem während des Spinnbetriebes die Rotortasse 17 eines Spinnrotors 19 mit hoher Drehzahl umläuft. Der Spinnrotor 19 ist dabei durch einen Antrieb 21 einzelmotorisch antreibbar und in einer Magnetlagereinrichtung berührungslos gelagert.Such open-end rotor spinning machines 1 are generally also equipped with a cross-wound bobbin transport device 12 for disposing of the cross-wound bobbins 8 finished on the winding devices 4 and often with a service unit 16 which is mounted on or on the open-end rotor spinning machine 1 on a guide rail 13 and a support rail 15 so that it can move. Such service units 16 patrol along the work stations 2 of the open-end rotor spinning machine 1 and intervene automatically when there is a need for action at one of the work stations 2. Such a need for action exists, for example, when a full cross-wound bobbin 8 has to be exchanged for a new empty tube at one of the work stations 2. The open-end rotor spinning devices 3 of such Workplaces 2 each have, as shown below on the basis of the Figures 2 to 8 shown in more detail, via a rotor housing 10 which is connected to a vacuum source 23 via at least one pneumatic line 29 and in which the rotor cup 17 of a spinning rotor 19 rotates at high speed during spinning operation. The spinning rotor 19 can be driven by a drive 21 as an individual motor and is mounted in a magnetic bearing device without contact.

Derartig angetriebene und gelagerte Spinnrotoren 19 sind im Prinzip bekannt und beispielsweise in der EP 0 972 868 A2 relativ ausführlich beschrieben.Such driven and supported spinning rotors 19 are known in principle and are used, for example, in EP 0 972 868 A2 described in relatively great detail.

Das in Fig. 2 in perspektivischer Ansicht dargestellte Rotorgehäuse 10 ist vorzugsweise als zentrales, tragendes Bauteil ausgebildet und aus einem gut wärmeleitfähigen Metall, zum Beispiel Aluminium, gefertigt. Das Rotorgehäuse 10 verfügt über Lagerarme 27, die beispielsweise, wie in Fig. 3 dargestellt, mittels Schraubverbindungen 28 befestigt sind. Die Lagerarme 27 weisen endseitig jeweils eine Lagereinrichtung 26 auf, die eine Schwenkachse 25 für ein begrenzt drehbar gelagertes, auswechselbares Deckelelement 22 bildet, welches unter anderem mit der Faserband-Auflöseeinrichtung 30 ausgestattet ist. Eine solche Faserband-Auflöseeinrichtung 30, die in den Fig. 1 und 2 stark schematisch dargestellt ist, verfügt beispielsweise über eine einzelmotorisch angetriebene Auflösewalze zum Auskämmen des vorgelegten Faserbandes 6 sowie über einen ebenfalls einzelmotorisch angetriebenen Faserbandeinzugszylinder zum Transportieren des Faserbandes 6.This in Fig.2 The rotor housing 10 shown in perspective view is preferably designed as a central, load-bearing component and is made of a metal with good thermal conductivity, for example aluminum. The rotor housing 10 has bearing arms 27 which, for example, as in Fig.3 shown, are fastened by means of screw connections 28. The bearing arms 27 each have a bearing device 26 at their ends, which forms a pivot axis 25 for a limitedly rotatable, replaceable cover element 22, which is equipped, among other things, with the fiber band opening device 30. Such a fiber band opening device 30, which is shown in the Fig.1 and 2 is shown very schematically, has, for example, an opening roller driven by an individual motor for combing out the fiber sliver 6 provided as well as a fiber sliver feed cylinder, also driven by an individual motor, for transporting the fiber sliver 6.

Wie vorstehend bereits angedeutet, ist das Rotorgehäuse 10 durch das Deckelelement 22 verschließbar und auf seiner Rückseite mit einem elektromotorischen Einzelantrieb 21 für einen Spinnrotor 19 ausgestattet. Von dem elektromotorischen Einzelantrieb 21 ist in Fig. 2 nur das Antriebsgehäuse 38 zu sehen. Der elektromotorische Einzelantrieb 21 ist dabei außerdem mit einer Magnetlageranordnung ausgestattet, die eine berührungslose Lagerung des während des Spinnbetriebes mit sehr hoher Drehzahl rotierenden Spinnrotors 19 gewährleistet. Im Bereich des elektromotorischen Einzelantriebes 21 sind außerdem oft elektronische Baugruppen installiert, die für einen ordnungsgemäßen Betrieb des Spinnrotors 19 sorgen. Die elektronische Baugruppen weisen beispielsweise die Steuerelektronik für den Antrieb und die Lagerung des Spinnrotors 19 auf, das heißt, die elektronischen Baugruppen sorgen dafür, dass der Spinnrotor 19 während des Spinnbetriebes stets mit einer vorgeschriebenen Drehzahl sowie berührungslos rotiert.As already indicated above, the rotor housing 10 can be closed by the cover element 22 and is equipped on its rear side with an electric motor drive 21 for a spinning rotor 19. The electric motor drive 21 is shown in Fig.2 only the drive housing 38 can be seen. The electromotive individual drive 21 is also equipped with a magnetic bearing arrangement, which ensures contactless bearing of the spinning rotor 19, which rotates at a very high speed during spinning. In the area of the electromotive individual drive 21, electronic components are also often installed, which ensure that the spinning rotor 19 operates properly. The electronic components have, for example, the control electronics for the drive and bearing of the spinning rotor 19, i.e. the electronic components ensure that the spinning rotor 19 always rotates at a prescribed speed and without contact during spinning.

In einer Aufnahme des Deckelelementes 22 ist außerdem, wie üblich, auswechselbar ein so genannter Kanalplattenadapter angeordnet, der im Bereich eines turmartigen Ansatzes 35 mit einer Fadenabzugsdüse 37 sowie dem Ausgangsbereich eines Faserleitkanals ausgestattet ist.In a receptacle of the cover element 22, a so-called channel plate adapter is also arranged in an exchangeable manner, as is usual, which is equipped with a thread take-off nozzle 37 and the exit area of a fiber guide channel in the area of a tower-like extension 35.

Die Fig. 3 zeigt ein Rotorgehäuse 10 in Vorderansicht. Wie ersichtlich, sind am Rotorgehäuse 10 mittels Schraubverbindungen 28 Lagerarme 27 befestigt, die endseitig jeweils mit einer Lagereinrichtung 26 ausgestattet sind. In diesen Lagereinrichtungen 26 ist, wie vorstehend im Zusammenhang mit der Fig. 2 erläutert, begrenzt drehbar ein auswechselbares Deckelelement 22 gelagert. Das Rotorgehäuse 10 weist des Weiteren eine zentrale Ausnehmung 24 auf, in der während des Spinnbetriebes die Rotortasse 17 eines Spinnrotors 19 mit hoher Drehzahl rotiert. Um während des Spinnbetriebes im Rotorgehäuse 10 einen Spinnunterdruck bereitstellen zu können, der zwingend notwendig ist, ist die Ausnehmung 24 außerdem über eine Einlassöffnung 34, an die eine Pneumatikleitung 29 angeschlossen ist, mit einer Unterdruckquelle 23 verbunden. Die Einlassöffnung 34 für die Pneumatikleitung 29 ist beim vorliegenden Ausführungsbeispiel im Bereich der runden Rückwand 33 des Rotorgehäuses 10 angeordnet. Der Querschnitt A1 der Pneumatikleitung 29 ist langlochartig gebogen.The Fig.3 shows a rotor housing 10 in front view. As can be seen, bearing arms 27 are attached to the rotor housing 10 by means of screw connections 28, each of which is equipped with a bearing device 26 at the end. In these bearing devices 26, as above in connection with the Fig.2 explained, a replaceable cover element 22 is mounted so as to be able to rotate to a limited extent. The rotor housing 10 also has a central recess 24 in which the rotor cup 17 of a spinning rotor 19 rotates at high speed during spinning. In order to be able to provide a spinning vacuum in the rotor housing 10 during spinning, which is absolutely necessary, the recess 24 is also connected to a vacuum source 23 via an inlet opening 34 to which a pneumatic line 29 is connected. In the present embodiment, the inlet opening 34 for the pneumatic line 29 is arranged in the area of the round rear wall 33 of the rotor housing 10. The cross section A 1 of the pneumatic line 29 is bent like an elongated hole.

Die Fig. 4 zeigt ein Rotorgehäuse 10 in Seitenansicht sowie im Schnitt. Das Rotorgehäuse 10 ist dabei bezüglich der Darstellung der Fig. 3 außerdem um 90° um seine Horizontalachse 36 gedreht. Wie ersichtlich, weist das Rotorgehäuse 10 eine Ausnehmung 24 auf, die im Bedarfsfall durch das Deckelelement 22 verschließbar ist. In der Ausnehmung 24 rotiert während des Spinnprozesses mit hoher Drehzahl die Rotortasse 17 eines Spinnrotors 19. An der Rückseite des Rotorgehäuses 10 ist ein elektromotorischer Einzelantrieb 21 für den Spinnrotor 19 installiert, der, wie bekannt, mit einer (nicht dargestellten) Magnetlageranordnung ausgestattet ist. Des Weiteren weist das Rotorgehäuse 10 im Bereich der Rückwand 33 eine Einlassöffnung 34 auf, an die eine Pneumatikleitung 29 angeschlossen ist, die mit einer Unterdruckquelle 23 verbunden ist. Die während des Spinnbetriebes von der Unterdruckquelle 23 in der Pneumatikleitung 29 initiierte Saugluftströmung sorgt einerseits dafür, dass im Rotorgehäuse 10 ein ausreichend hoher Spinnunterdruck gegeben ist, anderseits sorgt die Saugluftströmung dafür, dass Motorwärme abgeführt und dadurch der elektromotorische Einzelantrieb 21 des Spinnrotors 19 sowie der zugehörigen Magnetlageranordnung gekühlt wird.The Fig.4 shows a rotor housing 10 in side view and in section. The rotor housing 10 is shown with regard to the representation of the Fig.3 also rotated by 90° about its horizontal axis 36. As can be seen, the rotor housing 10 has a recess 24 which can be closed by the cover element 22 if necessary. During the spinning process, the rotor cup 17 of a spinning rotor 19 rotates in the recess 24 at high speed. An electric motor-driven individual drive 21 for the spinning rotor 19 is installed on the rear of the rotor housing 10, which, as is known, is equipped with a magnetic bearing arrangement (not shown). Furthermore, the rotor housing 10 has an inlet opening 34 in the area of the rear wall 33, to which a pneumatic line 29 is connected, which is connected to a vacuum source 23. The suction air flow initiated during spinning operation by the vacuum source 23 in the pneumatic line 29 ensures, on the one hand, that a sufficiently high spinning vacuum is present in the rotor housing 10; on the other hand, the suction air flow ensures that motor heat is dissipated and, as a result, the individual electromotive drive 21 of the spinning rotor 19 and the associated magnetic bearing arrangement is cooled.

Die Fig. 5 zeigt eine weitere mögliche Ausführungsform eines Rotorgehäuses 10. Bei diesem Ausführungsbeispiel ist das Rotorgehäuse 10 ebenfalls, wie üblich, mit Lagerarmen 27, die zum Beispiel mittels Schraubverbindungen 28 befestigt sind, sowie einer zentralen Ausnehmung 24 zur Aufnahme der Rotortasse 17 eines Spinnrotors 19 ausgestattet. Wie ersichtlich, weist die Rückseite der zentralen Ausnehmung 24 hier allerdings eine seitliche Ausbuchtung 31 auf, in der die Einlassöffnung 34 für eine Pneumatikleitung 29 angeordnet ist. Eine solche Ausbildung hat den Vorteil, dass die Pneumatikleitung 29 im Bedarfsfall, wenn zum Beispiel Anbauteile des Spinnrotorantriebes oder der Magnetlageranordnung im Wege stehen, auch nachträglich problemlos benachbart zu diesen Anbauteilen positioniert werden kann.The Fig.5 shows another possible embodiment of a rotor housing 10. In this embodiment, the rotor housing 10 is also equipped, as usual, with bearing arms 27, which are fastened, for example, by means of screw connections 28, and a central recess 24 for receiving the rotor cup 17 of a spinning rotor 19. As can be seen, the back of the central recess 24 here has a lateral bulge 31 in which the inlet opening 34 for a pneumatic line 29 is arranged. Such a design has the advantage that the pneumatic line 29 can, if necessary, for example if attachments of the spinning rotor drive or the magnetic bearing arrangement are in the way, also subsequently be easily positioned adjacent to these attachments.

In Fig. 6 ist in Seitenansicht und im Schnitt eine weitere Ausführungsvariante eines Rotorgehäuses 10 dargestellt. Bei dieser Ausführungsvariante ist die Einlassöffnung 34 für die Pneumatikleitung 29 im Bereich der Seitenwandung 32 der Ausnehmung 24 des Rotorgehäuses 10 angeordnet, das heißt, bei dieser Ausführungsvariante zweigt die Pneumatikleitung 29 radial von der Seitenwandung 32 der Ausnehmung 24 des Rotorgehäuses 10 ab.In Fig.6 is shown in side view and in section a further embodiment of a rotor housing 10. In this embodiment the inlet opening 34 for the pneumatic line 29 is arranged in the area of the side wall 32 of the recess 24 of the rotor housing 10, i.e. in this embodiment the pneumatic line 29 branches off radially from the side wall 32 of the recess 24 of the rotor housing 10.

Die Figuren 7 und 8 zeigen eine weitere alternative Ausführungsform eines vorteilhaften Rotorgehäuses 10. Hier umfasst die Pneumatikleitungen 29 mehrere Teilleitungen Wie ersichtlich, sind bei dieser Ausführungsform drei, jeweils um 120° zueinander versetzt angeordnete Teilleitungen an die Ausnehmung 24 des Rotorgehäuses 10 angeschlossen. Die zugehörigen Einlassöffnungen 34 befinden sich dabei im Bereich der Rückwand 33 der Ausnehmung 24 des Rotorgehäuses 10. Auch bei dieser Ausführungsform erzeugt eine an die Teilleitungen angeschlossene Unterdruckquelle 23, wie vorstehend bereits beschrieben, eine Saugluftströmung, die nicht nur für den notwendigen Spinnunterdruck sorgt, sondern auch eine Kühleinrichtung für den elektromotorischen Einzelantrieb 21 des Spinnrotors 19 bildet.The Figures 7 and 8 show a further alternative embodiment of an advantageous rotor housing 10. Here, the pneumatic lines 29 comprise several sub-lines. As can be seen, in this embodiment, three sub-lines, each offset by 120° from one another, are connected to the recess 24 of the rotor housing 10. The associated inlet openings 34 are located in the area of the rear wall 33 of the recess 24 of the rotor housing 10. In this embodiment, too, a vacuum source 23 connected to the sub-lines generates, as already described above, a suction air flow which not only provides the necessary spinning vacuum, but also forms a cooling device for the individual electric motor drive 21 of the spinning rotor 19.

BezugszeichenlisteList of reference symbols

11 Offenend-RotorspinnmaschineOpen-end rotor spinning machine 2020 AnspinnorganPiecing organ 22 Arbeitsstelleplace of work 2121 elektromotorischer Einzelantriebsingle electric motor drive 33 Offenend-RotorspinnvorrichtungOpen-end rotor spinning device 2222 DeckelelementCover element 44 SpuleinrichtungWinding device 2323 UnterdruckquelleVacuum source 55 SpinnkanneSpinning can 2424 AusnehmungRecess 66 FaserbandSliver 2525 SchwenkachseSwivel axis 77 Fadenthread 2626 LagereinrichtungStorage facility 88th KreuzspuleCross-wound bobbin 2727 LagerarmBearing arm 99 SpulenrahmenBobbin frame 2828 SchraubverbindungScrew connection 1010 RotorgehäuseRotor housing 2929 PneumatikleitungPneumatic line 1111 SpulenantriebswalzeCoil drive roller 3030 Faserband-AuflöseeinrichtungSliver opening device 1212 Kreuzspulen-TransporteinrichtungCross-wound bobbin transport device 3131 seitliche Ausbuchtunglateral bulge 1313 FührungsschieneGuide rail 3232 SeitenwandSide wall 1414 SaugdüseSuction nozzle 3333 RückwandBack wall 1515 StützschieneSupport rail 3434 EinlassöffnungInlet opening 1616 ServiceaggregatService unit 3535 AnsatzApproach 1717 RotortasseRotor cup 3636 HorizontalachseHorizontal axis 1818 FadenchangiereinrichtungThread traversing device 3737 FadenabzugsdüseThread take-off nozzle 1919 SpinnrotorSpinning rotor 3838 AntriebsgehäuseDrive housing

Claims (8)

  1. Open-end rotor spinning device (3) comprising a spinning rotor (19) that can be driven by means of an electric motor individual drive (21), the rotor cup (17) of which revolves in a rotor housing (10) which, during the spinning process, is closed by the cover element (22) and is connected via a pneumatic line (29) to a negative pressure source (23), the electric motor individual drive (21) comprising a drive housing (38),
    characterized in that
    the pneumatic line (29) arranged between the rotor housing (10) and the negative pressure source (23) is positioned in the region of the electric motor individual drive (21) of the spinning rotor (19) in such a way that the spinning negative pressure initiated by the negative pressure source (23) ensures cooling of the individual drive (21) of the spinning rotor (19) via a suction air flow present in the pneumatic line (29), the pneumatic line (29) being integrated into the drive housing (38) and thus being arranged in the region of the drive housing (38) of the individual drive (21) of the spinning rotor (19) such that the heat generated by the individual drive (21) is removed by the suction air flow.
  2. Open-end rotor spinning device (3) according to claim 1, characterized in that the drive housing (38) is in the form of a cast part.
  3. Open-end rotor spinning device (3) according to any of the preceding claims, characterized in that the pneumatic line (29) comprises a plurality of partial lines, and that the rotor housing (10) is connected to the negative pressure source (23) via the plurality of partial lines (29).
  4. Open-end rotor spinning device (3) according to any of the preceding claims, characterized in that the pneumatic line (29) is connected to the rotor housing (10) via at least one inlet opening (34), which is arranged in the region of the rear wall (33) of the rotor housing (10).
  5. Open-end rotor spinning device (3) according to claim 4, characterized in that the rear wall (33) of the rotor housing (10) has a circular shape.
  6. Open-end rotor spinning device (3) according to claim 4, characterized in that the rear wall (33) of the rotor housing (10) has a lateral bulge (31) in which the inlet opening (34) for a pneumatic line (29) is arranged.
  7. Open-end rotor spinning device (3) according to any of claims 1 to 3, characterized in that the pneumatic line (29) branches radially from the rotor housing (10), and an inlet opening (34) of the pneumatic line (29) is arranged in the lateral wall (32) of the rotor housing (10).
  8. Open-end rotor spinning device (3) according to any of the preceding claims, characterized in that the pneumatic line (29) has a curved, oval or slot-like cross-section (A1).
EP19187696.0A 2018-07-24 2019-07-23 Open-end rotor spinning device Active EP3599298B1 (en)

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CN113106558B (en) * 2021-03-17 2022-04-22 亿茂环境科技股份有限公司 High-speed centrifugal spinning nozzle assembly

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CN110777454B (en) 2022-06-21
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CN110777454A (en) 2020-02-11

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