EP3461937B1 - Open-end spinning machine - Google Patents

Open-end spinning machine Download PDF

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Publication number
EP3461937B1
EP3461937B1 EP18188483.4A EP18188483A EP3461937B1 EP 3461937 B1 EP3461937 B1 EP 3461937B1 EP 18188483 A EP18188483 A EP 18188483A EP 3461937 B1 EP3461937 B1 EP 3461937B1
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EP
European Patent Office
Prior art keywords
rotor
spinning
open
rotor housing
housing
Prior art date
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EP18188483.4A
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German (de)
French (fr)
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EP3461937A2 (en
EP3461937A3 (en
Inventor
Jakub Miodek
Lothar Winzen
Andreas Jakobinski
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 EP3461937A2 publication Critical patent/EP3461937A2/en
Publication of EP3461937A3 publication Critical patent/EP3461937A3/en
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    • 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
    • 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

Definitions

  • the present invention relates to an open-end spinning device comprising a rotor housing that can be subjected to negative pressure and a spinning rotor.
  • the rotor housing is open towards the front and can be closed by a cover element.
  • the rotor housing has a rear wall with a passage opening for a rotor shaft of the spinning rotor.
  • the rotor shaft is driven outside of the rotor housing.
  • the rear wall of the rotor housing is designed in such a way that the area behind the spinning rotor is covered inside the rotor housing.
  • An open-end spinning device comprises a rotor housing with a cover element for closing the rotor housing.
  • a spinning rotor is arranged in the rotor housing.
  • the spinning rotor is rotatably mounted.
  • the spinning rotor can be driven in various ways for spinning. It is known to drive the spinning rotors of several open-end spinning devices via a common drive. The power can be transmitted from the common drive to the spinning rotors, for example by means of a belt. It is also known that an individual electric motor drive is assigned to each spinning rotor. In connection with a single drive, the spinning rotor is preferably mounted without contact.
  • a non-contact bearing can be designed as a magnetic bearing. Spinning rotors with non-contact bearings and individual drives are particularly sensitive to dirt.
  • a negative pressure in the rotor housing is required for spinning.
  • Known open-end rotor spinning machines therefore have a central vacuum source and a machine-long vacuum line.
  • the vacuum supply for the open-end spinning devices is realized by connecting the rotor housing to the machine-long vacuum line.
  • fiber material is introduced into the rotor housing via a fiber guide channel and the finished spun yarn is drawn off from the rotor housing via a yarn withdrawal channel.
  • the end of the thread withdrawal channel on the spinning rotor side is located on a projection which is attached to the cover element and protrudes into the spinning rotor. If the fibers fed into the rotor are no longer transported out by the spinning process, fiber rings are formed. This can happen, for example, in the event of a yarn breakage and possibly a delayed shutdown of the sliver feed.
  • the fibers by the centrifugal forces in the Rotor groove held. When the spinning rotor brakes, the fiber ring collapses and wraps itself around the projection protruding into the spinning rotor. From there, the fiber ring can get further behind the spinning rotor and form a fiber lap. Such a fiber lap can no longer be sucked off by the negative pressure prevailing in the rotor housing and impairs the spinning result.
  • the DE 103 03 481 A1 discloses an open-end spinning device with a spinning rotor consisting of a rotor plate and a rotor shaft, with a rotor housing which is under vacuum and surrounds the rotor plate and has a through-opening for the rotor shaft mounted outside of the rotor housing, and with a through-opening which seals the through-opening with respect to the rotor shaft in the radial direction floating sealing element which forms a sealing gap with the rotor shaft and bears axially on the rotor housing.
  • the sealing element is provided with an extension which envelops a rear wall of the rotor disk facing the passage opening up to the region of the largest outer diameter of the rotor disk, leaving a narrow enveloping gap.
  • the air friction on the rotor plate is to be significantly reduced by the extension enveloping the rotor plate.
  • this arrangement cannot prevent a filament winding from forming inside the rotor housing behind the spinning rotor or, more precisely, behind the rotor plate.
  • the DE 25 38 261 A1 discloses an open-end spinning device having a spinning rotor located within a housing space which is under negative pressure during operation.
  • the housing chamber facing the rear of the spinning rotor has several annular recesses with different diameters arranged concentrically to the axis of rotation of the spinning rotor and arranged one behind the other in the longitudinal direction, which are adapted to the different working diameters of the spinning rotors that can be used in the spinning device.
  • the outer jacket part of a spinning rotor forms an annular gap with the corresponding recess. This acts as a seal between the front housing space accommodating the spinning rotor and the rear part facing the bearing. This also prevents fibers sucked out of the spinning rotor by the vacuum source when the spinning device is switched off from getting into the part of the housing space located behind the spinning rotor.
  • an open-end spinning device comprising a rotor housing that can be subjected to negative pressure and a spinning rotor.
  • the rotor housing is open towards the front and can be closed by a cover element, and towards the rear the rotor housing has a rear wall with a passage opening for a rotor shaft of the spinning rotor.
  • At the largest outer diameter of the spinning rotor there is a narrow gap of less than 2 mm between the spinning rotor and the rear wall of the rotor housing, and the rear wall of the rotor housing is designed in such a way that the area behind the spinning rotor is hidden inside the rotor housing.
  • the rear wall of the rotor housing is at least partially formed by an exchangeable attachment that rests on a rear boundary wall of the rotor housing. In this case, the attachment extends up to the lateral boundary walls of the rotor housing.
  • the construction of the rear wall of the rotor housing according to the invention shields the area behind the spinning rotor inside the rotor housing, so that fiber laps cannot get there.
  • the rear wall of the rotor housing is designed in such a way that there are no passages into the area behind the spinning rotor from the front.
  • the only exception is the gap between the rear wall of the rotor housing and the largest outside diameter of the spinning rotor.
  • the gap width according to the invention is maintained at less than 2 mm, the passage of fibers can be largely prevented.
  • the gap width should be greater than 0.2mm to avoid contact of the spinning rotor with the back wall. A gap width of 1 mm is preferred.
  • the rear wall of the rotor housing is at least partially formed by an exchangeable attachment that rests on a rear boundary wall of the rotor housing.
  • the rear wall of the rotor housing can easily be adapted to different shapes and diameters of the spinning rotor.
  • the attachment extends up to the lateral boundary walls of the rotor housing. This allows for easy attachment. Clip or press connections can be easily implemented.
  • the inventive Open-end spinning device has the advantage of low air friction.
  • a rotor generates a turbulent flow through its rotation, which leads to friction losses and thus to a higher power consumption of its drive.
  • the design of the rear wall of the rotor housing according to the invention converts the turbulent flow into a laminar flow. The air flow is guided outwards. This creates a pressure drop. Less air means less air friction and thus energy savings for the drive.
  • the spinning rotor has a rotor base facing the rear wall of the rotor housing.
  • the narrow gap can continue at least partially along the bottom of the rotor. With distance from the largest outside diameter, the gap width can change. It is by no means necessary for the gap to continue as far as the rotor shaft. There may well be a cavity behind the spinning rotor. It is only essential to the invention that the area behind the spinning rotor is shielded.
  • the spinning rotor has an outer edge at the largest outer diameter and the narrow gap continues axially along the outer edge.
  • the attachment preferably forms the narrow gap at the largest outer diameter of the spinning rotor with the spinning rotor.
  • the insert is preferably rotationally symmetrical and is arranged centrally to the spinning rotor.
  • the attachment can be cone-shaped, with the diameter of the attachment increasing from the front to the rear.
  • the attachment can also be cylindrical.
  • the attachment can be attached to a boundary wall of the rotor housing by means of a clip connection, a screw connection, a magnetic force or an interference fit.
  • the 1 shows an open-end spinning device not according to the invention.
  • This comprises a rotor housing 1 open towards the front and a spinning rotor 2 arranged therein.
  • the rotor housing 1 is closed by a cover element (not shown) and is subjected to negative pressure by a negative pressure supply (not shown).
  • a negative pressure supply not shown
  • Away from the open side, that is to the rear, the rotor housing 1 has a passage opening 4 for a rotor shaft 5 of the spinning rotor 2 .
  • the rotor shaft 5 and thus the spinning rotor 2 are driven outside of the rotor housing 1 .
  • the rotationally symmetrical spinning rotor 2 comprises a rotor shaft 5 and a spinning cup 13.
  • the spinning cup 13 comprises a rotor base 9 and an annular wall section 14.
  • the annular wall section 14 tapers conically towards the open end.
  • the largest outer diameter of the spinning rotor 2 is thus located in the transition area between the rotor base 9 and the annular wall section 14.
  • the spinning rotor 2 shown has an outer edge 8 at the largest outer diameter.
  • the embodiment of 1 has an attachment 10 .
  • the attachment 10 is attached to the rear boundary wall 11 of the rotor housing 1 .
  • the rear wall 3 of the rotor housing 1 is thus partially formed by the attachment 10 .
  • the rear wall 3 of the rotor housing 1, in the exemplary embodiment shown the attachment 10, covers the area 7 behind the spinning rotor 2.
  • the attachment 10 forms part of the largest outer diameter of the spinning rotor 2 the spinning rotor has a narrow gap 6 with a gap width of less than 2 mm.
  • the gap width results from the smallest distance between the largest outer diameter of the spinning rotor 2 and the rear wall 3 of the rotor housing 1 .
  • the gap 6 continues along the rotor base 9 .
  • the gap 6 also continues axially along the outer edge 8 .
  • the rear wall 3 of the rotor housing 1 shields the area 7 behind the spinning rotor 2 inside the rotor housing 1 .
  • the rear wall 3 is designed in such a way that there is no opening along an imaginary lateral surface around the axis of rotation of the spinning rotor 2 through the largest outer diameter of the spinning rotor, with the exception of the narrow gap between the spinning rotor 2 and the rear wall 3.
  • the attachment 10 is conical.
  • the diameter of the rotationally symmetrical attachment 10 increases from the spinning rotor 2 to the rear boundary wall 11 .
  • the attachment 10 can also be cylindrical.
  • the 2 shows an open-end spinning device according to the invention.
  • the open-end spinning device 2 essentially corresponds to the open-end spinning device 1 .
  • the two spinning devices differ in the design of the article 10.
  • the article 10 of the 2 namely, according to the invention, extends up to the lateral boundary walls 12 of the rotor housing 1.
  • the non-inventive embodiment of 3 dispenses with an exchangeable attachment 10.
  • the rotor housing is constructed in one piece.
  • the rear wall 3 of the rotor housing 1 thus corresponds to the rear boundary wall 11. Otherwise, the shape and structure of the open-end spinning device corresponds to FIG 2 .
  • the 4 shows a variant not according to the invention without attachment 10.
  • gap 6 at the largest outer diameter of spinning rotor 3 does not continue along outer edge 8 of the spinning rotor.
  • the rear wall 3 of the rotor housing 1 and the rotor base 9 are designed in such a way that the gap 6 continues along the rotor base.
  • This design makes it possible to use spinning rotors 2 with different diameters in the rotor housing 1 without an exchangeable attachment.
  • the spinning rotors 2 only have to have the same angle of inclination on the rotor base 9 .
  • the figure 5 shows a variant of an open-end spinning device according to the invention with a different spinning rotor 2.
  • the gap 6 also continues along the rotor base 9 .
  • the gap width at the rotor base 9 is larger than at the largest outer diameter of the spinning rotor 2.

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

Description

Die vorliegende Erfindung betrifft eine Offenend-Spinneinrichtung umfassend ein mit Unterdruck beaufschlagbares Rotorgehäuse und einen Spinnrotor. Das Rotorgehäuse ist nach vorne hin offen und durch ein Deckelelement verschließbar. Nach hinten weist das Rotorgehäuse eine Rückwand mit einer Durchtrittsöffnung für einen Rotorschaft des Spinnrotors auf. Der Rotorschaft wird außerhalb des Rotorgehäuses angetrieben. Die Rückwand des Rotorgehäuses ist so ausgebildet, dass im Inneren des Rotorgehäuses der Bereich hinter dem Spinnrotor verdeckt wird.The present invention relates to an open-end spinning device comprising a rotor housing that can be subjected to negative pressure and a spinning rotor. The rotor housing is open towards the front and can be closed by a cover element. To the rear, the rotor housing has a rear wall with a passage opening for a rotor shaft of the spinning rotor. The rotor shaft is driven outside of the rotor housing. The rear wall of the rotor housing is designed in such a way that the area behind the spinning rotor is covered inside the rotor housing.

Eine Offenend-Spinneinrichtung umfasst ein Rotorgehäuse mit einem Deckelelement zum Verschließen des Rotorgehäuses. In dem Rotorgehäuse ist ein Spinnrotor angeordnet. Der Spinnrotor ist drehbar gelagert. Der Spinnrotor kann zum Spinnen auf verschiedene Weise angetrieben werden. Es ist bekannt, die Spinnrotoren mehrerer Offenend-Spinneinrichtungen über einen gemeinsamen Antrieb anzutreiben. Die Kraft kann von dem gemeinsamen Antrieb auf die Spinnrotoren beispielsweise mittels eines Riemens übertragen werden. Es ist auch bekannt, dass jedem Spinnrotor ein elektromotorischer Einzelantrieb zugeordnet ist. In Verbindung mit einem Einzelantrieb ist der Spinnrotor vorzugsweise berührungslos gelagert. Eine berührungslose Lagerung kann als magnetische Lagerung ausgebildet sein. Berührungslos gelagerte Spinnrotoren mit Einzelantrieben sind besonders empfindlich gegen Verschmutzungen.An open-end spinning device comprises a rotor housing with a cover element for closing the rotor housing. A spinning rotor is arranged in the rotor housing. The spinning rotor is rotatably mounted. The spinning rotor can be driven in various ways for spinning. It is known to drive the spinning rotors of several open-end spinning devices via a common drive. The power can be transmitted from the common drive to the spinning rotors, for example by means of a belt. It is also known that an individual electric motor drive is assigned to each spinning rotor. In connection with a single drive, the spinning rotor is preferably mounted without contact. A non-contact bearing can be designed as a magnetic bearing. Spinning rotors with non-contact bearings and individual drives are particularly sensitive to dirt.

Zum Spinnen ist ein Unterdruck in dem Rotorgehäuse erforderlich. Deshalb weisen bekannte Offenend-Rotorspinnmaschinen eine zentrale Unterdruckquelle und eine maschinenlange Unterdruckleitung auf. Die Unterdruckversorgung der Offenend-Spinneinrichtungen wird durch einen Anschluss des Rotorgehäuses an die maschinenlange Unterdruckleitung realisiert.A negative pressure in the rotor housing is required for spinning. Known open-end rotor spinning machines therefore have a central vacuum source and a machine-long vacuum line. The vacuum supply for the open-end spinning devices is realized by connecting the rotor housing to the machine-long vacuum line.

Im Spinnbetrieb wird über einen Faserleitkanal Fasermaterial in das Rotorgehäuse eingeführt und der fertig gesponnene Faden wird über einen Fadenabzugskanal aus dem Rotorgehäuse abgezogen. Das spinnrotorseitige Ende des Fadenabzugskanals befindet sich an einem Ansatz, der an dem Deckelelement befestigt ist und in den Spinnrotor ragt. Wenn die in den Rotor eingespeisten Fasern nicht mehr durch den Spinnprozess herausbefördert werden, entstehen Faserringe. Dies kann zum Beispiel bei einem Fadenbruch und ggf. zeitlich verzögerter Abstellung der Faserbandzufuhr passieren. Zunächst werden die Fasern durch die Fliehkräfte in der Rotorrille gehalten. Beim Bremsen des Spinnrotors fällt der Faserring zusammen und legt sich um den in den Spinnrotor ragenden Ansatz. Von dort kann der Faserring weiter hinter den Spinnrotor gelangen und einen Faserwickel bilden. Ein solcher Faserwickel kann durch den in dem Rotorgehäuse herrschenden Unterdruck nicht mehr abgesaugt werden und beeinträchtigt das Spinnergebnis.In the spinning operation, fiber material is introduced into the rotor housing via a fiber guide channel and the finished spun yarn is drawn off from the rotor housing via a yarn withdrawal channel. The end of the thread withdrawal channel on the spinning rotor side is located on a projection which is attached to the cover element and protrudes into the spinning rotor. If the fibers fed into the rotor are no longer transported out by the spinning process, fiber rings are formed. This can happen, for example, in the event of a yarn breakage and possibly a delayed shutdown of the sliver feed. First, the fibers by the centrifugal forces in the Rotor groove held. When the spinning rotor brakes, the fiber ring collapses and wraps itself around the projection protruding into the spinning rotor. From there, the fiber ring can get further behind the spinning rotor and form a fiber lap. Such a fiber lap can no longer be sucked off by the negative pressure prevailing in the rotor housing and impairs the spinning result.

Die DE 103 03 481 A1 offenbart eine Offenend-Spinneinrichtung mit einem aus Rotorteller und Rotorschaft bestehenden Spinnrotor, mit einem den Rotorteller umgebenden, unter Unterdruck stehenden Rotorgehäuse, welches eine Durchtrittsöffnung für den außerhalb des Rotorgehäuses gelagerten Rotorschaft aufweist, sowie mit einem die Durchtrittsöffnung abdichtenden, bezüglich des Rotorschaftes in radialer Richtung schwimmend angeordneten und mit dem Rotorschaft einen Dichtungsspalt bildenden, am Rotorgehäuse axial anliegenden Dichtungselement. Das Dichtungselement ist mit einem Fortsatz versehen, der eine der Durchtrittsöffnung zugewandte Rückwand des Rotortellers bis in den Bereich des größten Außendurchmessers des Rotortellers unter Belassen eines engen Hüllspaltes umhüllt. Durch den den Rotorteller umhüllenden Fortsatz soll die Luftreibung am Rotorteller deutlich verringert werden. Diese Anordnung kann jedoch nicht verhindern, dass sich im Inneren des Rotorgehäuses hinter dem Spinnrotor oder präziser hinter dem Rotorteller ein Fadenwickel bildet.The DE 103 03 481 A1 discloses an open-end spinning device with a spinning rotor consisting of a rotor plate and a rotor shaft, with a rotor housing which is under vacuum and surrounds the rotor plate and has a through-opening for the rotor shaft mounted outside of the rotor housing, and with a through-opening which seals the through-opening with respect to the rotor shaft in the radial direction floating sealing element which forms a sealing gap with the rotor shaft and bears axially on the rotor housing. The sealing element is provided with an extension which envelops a rear wall of the rotor disk facing the passage opening up to the region of the largest outer diameter of the rotor disk, leaving a narrow enveloping gap. The air friction on the rotor plate is to be significantly reduced by the extension enveloping the rotor plate. However, this arrangement cannot prevent a filament winding from forming inside the rotor housing behind the spinning rotor or, more precisely, behind the rotor plate.

Die DE 25 38 261 A1 offenbart eine Offenend-Spinneinrichtung mit einem Spinnrotor, der innerhalb eines im Betrieb unter Unterdruck stehenden Gehäuseraumes liegt. Der der Rückseite des Spinnrotors zugekehrte Gehäuseraum weist mehrere, konzentrisch zur Drehachse des Spinnrotors und in Längsrichtung zu dieser hintereinander angeordnete ringförmige Ausnehmungen mit unterschiedlichen Durchmessern auf, die den unterschiedlichen Arbeitsdurchmessern der in die Spinneinrichtung einsetzbaren Spinnrotoren angepasst sind. Der äußere Mantelteil eines Spinnrotors bildet mit der entsprechenden Ausnehmung einen Ringspalt. Dieser wirkt als Abdichtung des den Spinnrotor aufnehmenden vorderen Gehäuseraumes zu dem rückwärtigen dem Lager zugekehrten Teil. Auf diese Weise wird auch verhindert, dass beim Abstellen der Spinneinrichtung von der Unterdruckquelle aus dem Spinnrotor abgesaugte Fasern in den hinter dem Spinnrotor liegenden Teil des Gehäuseraumes gelangen.The DE 25 38 261 A1 discloses an open-end spinning device having a spinning rotor located within a housing space which is under negative pressure during operation. The housing chamber facing the rear of the spinning rotor has several annular recesses with different diameters arranged concentrically to the axis of rotation of the spinning rotor and arranged one behind the other in the longitudinal direction, which are adapted to the different working diameters of the spinning rotors that can be used in the spinning device. The outer jacket part of a spinning rotor forms an annular gap with the corresponding recess. This acts as a seal between the front housing space accommodating the spinning rotor and the rear part facing the bearing. This also prevents fibers sucked out of the spinning rotor by the vacuum source when the spinning device is switched off from getting into the part of the housing space located behind the spinning rotor.

Es ist die Aufgabe der vorliegenden Erfindung, eine alternative Spinneinrichtung zu schaffen, die das Auftreten von Fadenwickeln im Inneren des Rotorgehäuses hinter dem Spinnrotor verhindert und einfach an verschiedene Formen und Durchmesser des Spinnrotors anpassbar ist.It is the object of the present invention to provide an alternative spinning device which prevents the occurrence of filament winding inside the rotor housing behind the spinning rotor and is easily adaptable to different shapes and diameters of the spinning rotor is.

Zur Lösung der Aufgabe wird eine Offenend-Spinneinrichtung umfassend ein mit Unterdruck beaufschlagbares Rotorgehäuse und einen Spinnrotor vorgeschlagen. Das Rotorgehäuse ist nach vorne hin offen und durch ein Deckelelement verschließbar, nach hinten weist das Rotorgehäuse eine Rückwand mit einer Durchtrittsöffnung für einen Rotorschaft des Spinnrotors auf. Am größten Außendurchmesser des Spinnrotors ist ein enger Spalt von weniger als 2 mm Spaltbreite zwischen dem Spinnrotor und der Rückwand des Rotorgehäuses vorhanden und die Rückwand des Rotorgehäuses ist so ausgebildet, dass im Inneren des Rotorgehäuses der Bereich hinter dem Spinnrotor verdeckt wird. Die Rückwand des Rotorgehäuses wird zumindest teilweise durch einen wechselbaren Aufsatz gebildet, der auf einer rückwärtigen Begrenzungswand des Rotorgehäuses aufliegt. Dabei erstreckt sich der Aufsatz bis zu den seitlichen Begrenzungswänden des Rotorgehäuses.To solve the problem, an open-end spinning device is proposed, comprising a rotor housing that can be subjected to negative pressure and a spinning rotor. The rotor housing is open towards the front and can be closed by a cover element, and towards the rear the rotor housing has a rear wall with a passage opening for a rotor shaft of the spinning rotor. At the largest outer diameter of the spinning rotor, there is a narrow gap of less than 2 mm between the spinning rotor and the rear wall of the rotor housing, and the rear wall of the rotor housing is designed in such a way that the area behind the spinning rotor is hidden inside the rotor housing. The rear wall of the rotor housing is at least partially formed by an exchangeable attachment that rests on a rear boundary wall of the rotor housing. In this case, the attachment extends up to the lateral boundary walls of the rotor housing.

Durch die erfindungsgemäße Konstruktion der Rückwand des Rotorgehäuses wird im Inneren des Rotorgehäuses der Bereich hinter dem Spinnrotor abgeschirmt, sodass Faserwickel nicht dorthin gelangen können. Das heißt die Rückwand des Rotorgehäuses ist so gestaltet, dass es von vorne keine Durchgänge in den Bereich hinter dem Spinnrotor gibt. Die einzige Ausnahme ist der Spalt zwischen der Rückwand des Rotorgehäuses und dem größten Außendurchmesser des Spinnrotors. Bei Einhaltung der erfindungsgemäßen Spaltbreite von weniger als 2 mm kann ein Durchtritt von Fasern aber weitestgehend verhindert werden. Die Spaltbreite sollte größer als 0,2 mm sein, um einen Kontakt des Spinnrotors mit der Rückwand zu vermeiden. Eine Spaltbreite von 1 mm wird bevorzugt.The construction of the rear wall of the rotor housing according to the invention shields the area behind the spinning rotor inside the rotor housing, so that fiber laps cannot get there. This means that the rear wall of the rotor housing is designed in such a way that there are no passages into the area behind the spinning rotor from the front. The only exception is the gap between the rear wall of the rotor housing and the largest outside diameter of the spinning rotor. However, if the gap width according to the invention is maintained at less than 2 mm, the passage of fibers can be largely prevented. The gap width should be greater than 0.2mm to avoid contact of the spinning rotor with the back wall. A gap width of 1 mm is preferred.

Erfindungsgemäß wird die Rückwand des Rotorgehäuses zumindest teilweise durch einen wechselbaren Aufsatz gebildet, der auf einer rückwärtigen Begrenzungswand des Rotorgehäuses aufliegt.According to the invention, the rear wall of the rotor housing is at least partially formed by an exchangeable attachment that rests on a rear boundary wall of the rotor housing.

Auf diese Weise kann die Rückwand des Rotorgehäuses einfach an verschiedene Formen und Durchmesser des Spinnrotors angepasst werden.In this way, the rear wall of the rotor housing can easily be adapted to different shapes and diameters of the spinning rotor.

Weiter erfindungsgemäß erstreckt sich der Aufsatz bis zu den seitlichen Begrenzungswänden des Rotorgehäuses. Dadurch wird eine einfache Befestigung möglich. Klips- oder Pressverbindungen können leicht realisiert werden.According to the invention, the attachment extends up to the lateral boundary walls of the rotor housing. This allows for easy attachment. Clip or press connections can be easily implemented.

Zusätzlich zu der Verhinderung von Faserwickeln hinter dem Spinnrotor hat die erfindungsgemäße Offenend-Spinneinrichtung den Vorteil einer geringen Luftreibung. Ein Rotor erzeugt durch seine Drehung eine turbulente Strömung, die zu Reibungsverlusten und damit einer höheren Leistungsaufnahme seines Antriebs führt. Die erfindungsgemäße Ausbildung der Rückwand des Rotorgehäuses überführt die turbulente Strömung in eine laminare Strömung. Der Luftstrom wird dabei nach außen geführt. Es entsteht dabei ein Druckgefälle. Weniger Luft bedeutet weniger Luftreibung und damit eine Energieersparnis für den Antrieb.In addition to preventing filament winding behind the spinning rotor, the inventive Open-end spinning device has the advantage of low air friction. A rotor generates a turbulent flow through its rotation, which leads to friction losses and thus to a higher power consumption of its drive. The design of the rear wall of the rotor housing according to the invention converts the turbulent flow into a laminar flow. The air flow is guided outwards. This creates a pressure drop. Less air means less air friction and thus energy savings for the drive.

Der Spinnrotor weist einen der Rückwand des Rotorgehäuses zugewandten Rotorboden auf. Der enge Spalt kann sich der zumindest teilweise entlang des Rotorbodens fortsetzten. Mit Entfernung von dem größten Außendurchmesser kann sich die Spaltbreite ändern. Es ist keineswegs erforderlich, dass sich der Spalt bis zum Rotorschaft hin fortsetzt. Hinter dem Spinnrotor kann durchaus ein Hohlraum vorhanden sein. Erfindungswesentlich ist nur, dass der Bereich hinter dem Spinnrotor abgeschirmt ist.The spinning rotor has a rotor base facing the rear wall of the rotor housing. The narrow gap can continue at least partially along the bottom of the rotor. With distance from the largest outside diameter, the gap width can change. It is by no means necessary for the gap to continue as far as the rotor shaft. There may well be a cavity behind the spinning rotor. It is only essential to the invention that the area behind the spinning rotor is shielded.

Vorzugsweise weist der Spinnrotor am größten Außendurchmesser eine Außenkante auf und der enge Spalt setzt sich entlang der Außenkante axial fort.Preferably, the spinning rotor has an outer edge at the largest outer diameter and the narrow gap continues axially along the outer edge.

Dazu bildet vorzugsweise der Aufsatz den engen Spalt am größten Außendurchmesser des Spinnrotors mit dem Spinnrotor. Der Einsatz ist vorzugsweise rotationssymmetrisch und wird zentrisch zum Spinnrotor angeordnet. Der Aufsatz kann konusförmig ausgebildet sein, wobei der Durchmesser des Aufsatzes von vorne nach hinten zunimmt. Der Aufsatz kann auch zylindrisch sein.For this purpose, the attachment preferably forms the narrow gap at the largest outer diameter of the spinning rotor with the spinning rotor. The insert is preferably rotationally symmetrical and is arranged centrally to the spinning rotor. The attachment can be cone-shaped, with the diameter of the attachment increasing from the front to the rear. The attachment can also be cylindrical.

Der Aufsatz kann an einer Begrenzungswand des Rotorgehäuses mittels einer Klipsverbindung, einer Verschraubung, einer magnetischen Kraft oder einer Presspassung befestigt sein.The attachment can be attached to a boundary wall of the rotor housing by means of a clip connection, a screw connection, a magnetic force or an interference fit.

Die Erfindung wird nachfolgend anhand in den Zeichnungen dargestellter Ausführungsbeispiele näher erläutert.The invention is explained in more detail below with reference to exemplary embodiments illustrated in the drawings.

Es zeigen:

Fig. 1
eine nicht erfindungsgemäße Offenend-Spinneinrichtung mit einem wechselbaren Aufsatz;
Fig. 2
eine erfindungsgemäße Offenend-Spinneinrichtung mit einem wechselbaren Aufsatz;
Fig. 3
eine nicht erfindungsgemäße Offenend-Spinneinrichtung ohne Aufsatz;
Fig. 4
eine nicht erfindungsgemäße Offenend-Spinneinrichtung ohne Aufsatz;
Fig. 5
eine erfindungsgemäße Offenend-Spinneinrichtung mit einem alternativen Spinnrotor.
Show it:
1
a non-inventive open-end spinning device with a removable attachment;
2
an open-end spinning device according to the invention with a changeable attachment;
3
a non-inventive open-end spinning device without attachment;
4
a non-inventive open-end spinning device without attachment;
figure 5
an inventive open-end spinning device with an alternative spinning rotor.

Die Figuren zeigen erfindungsgemäße und nicht erfindungsgemäße Offenend-Spinneinrichtungen. Da Offenend-Spinneinrichtungen im Grundsatz bekannt sind, beschränkt sich die Darstellung der Figuren auf die erfindungswesentlichen Bestandteile. In den Figuren tragen Elemente mit vergleichbarer Funktion gleiche Bezugszeichen, auch wenn die Elemente anders ausgeführt sind.The figures show open-end spinning devices according to the invention and not according to the invention. Since open-end spinning devices are known in principle, the representation of the figures is limited to the components that are essential to the invention. In the figures, elements with a comparable function bear the same reference symbols, even if the elements are designed differently.

Die Fig. 1 zeigt eine nicht erfindungsgemäße Offenend-Spinneinrichtung. Diese umfasst ein nach vorne hin offenes Rotorgehäuse 1 und einen darin angeordneten Spinnrotor 2. Im Spinnbetrieb ist das Rotorgehäuse 1 durch ein nicht dargestelltes Deckelelement verschlossen und wird durch eine nicht dargestellte Unterdruckversorgung mit Unterdruck beaufschlagt. Der offenen Seite abgewandt, also nach hinten, weist das Rotorgehäuse 1 eine Durchtrittsöffnung 4 für einen Rotorschaft 5 des Spinnrotors 2 auf. Der Rotorschaft 5 und damit der Spinnrotor 2 werden außerhalb des Rotorgehäuses 1 angetrieben.The 1 shows an open-end spinning device not according to the invention. This comprises a rotor housing 1 open towards the front and a spinning rotor 2 arranged therein. During spinning operation, the rotor housing 1 is closed by a cover element (not shown) and is subjected to negative pressure by a negative pressure supply (not shown). Away from the open side, that is to the rear, the rotor housing 1 has a passage opening 4 for a rotor shaft 5 of the spinning rotor 2 . The rotor shaft 5 and thus the spinning rotor 2 are driven outside of the rotor housing 1 .

Der rotationssymmetrische Spinnrotor 2 umfasst einen Rotorschaft 5 und eine Spinntasse 13. Die Spinntasse 13 umfasst einen Rotorboden 9 und einen ringförmigen Wandabschnitt 14. Der ringförmige Wandabschnitt 14 läuft zum offenen Ende hin konisch zu. Der größte Außendurchmesser des Spinnrotors 2 befindet sich damit am Übergangsbereich zwischen dem Rotorboden 9 und dem ringförmigen Wandabschnitt 14. Der dargestellte Spinnrotor 2 weist am größten Außendurchmesser eine Außenkante 8 auf.The rotationally symmetrical spinning rotor 2 comprises a rotor shaft 5 and a spinning cup 13. The spinning cup 13 comprises a rotor base 9 and an annular wall section 14. The annular wall section 14 tapers conically towards the open end. The largest outer diameter of the spinning rotor 2 is thus located in the transition area between the rotor base 9 and the annular wall section 14. The spinning rotor 2 shown has an outer edge 8 at the largest outer diameter.

Die Ausführungsform der Fig. 1 weist einen Aufsatz 10 auf. Der Aufsatz 10 ist auf der rückwärtigen Begrenzungswand 11 des Rotorgehäuses 1 befestigt. Die Rückwand 3 des Rotorgehäuses 1 wird damit teilweise durch den Aufsatz 10 gebildet. Die Rückwand 3 des Rotorgehäuses 1, in dem dargestellten Ausführungsbeispiel der Aufsatz 10, verdeckt den Bereich 7 hinter dem Spinnrotor 2. Am größten Außendurchmesser des Spinnrotors 2 bildet der Aufsatz 10 mit dem Spinnrotor einen engen Spalt 6 mit weniger als 2 mm Spaltbreite. Die Spaltbreite ergibt sich aus dem geringsten Abstand des größten Außendurchmessers des Spinnrotors 2 von der Rückwand 3 des Rotorgehäuses 1. In dem Ausführungsbeispiel setzt sich der Spalt 6 entlang des Rotorbodens 9 fort. Der Spalt 6 setzt sich ebenfalls entlang der Außenkante 8 axial fort.The embodiment of 1 has an attachment 10 . The attachment 10 is attached to the rear boundary wall 11 of the rotor housing 1 . The rear wall 3 of the rotor housing 1 is thus partially formed by the attachment 10 . The rear wall 3 of the rotor housing 1, in the exemplary embodiment shown the attachment 10, covers the area 7 behind the spinning rotor 2. The attachment 10 forms part of the largest outer diameter of the spinning rotor 2 the spinning rotor has a narrow gap 6 with a gap width of less than 2 mm. The gap width results from the smallest distance between the largest outer diameter of the spinning rotor 2 and the rear wall 3 of the rotor housing 1 . In the exemplary embodiment, the gap 6 continues along the rotor base 9 . The gap 6 also continues axially along the outer edge 8 .

Die Rückwand 3 des Rotorgehäuses 1 schirmt im Inneren des Rotorgehäuses 1 den Bereich 7 hinter dem Spinnrotor 2 ab. Die Rückwand 3 ist dazu so ausbildet, dass entlang einer gedachten Mantelfläche um die Rotationsachse des Spinnrotors 2 durch den größten Außendurchmesser des Spinnrotors keine Öffnung vorhanden ist mit Ausnahme des engen Spaltes zwischen dem Spinnrotor 2 und der Rückwand 3.The rear wall 3 of the rotor housing 1 shields the area 7 behind the spinning rotor 2 inside the rotor housing 1 . The rear wall 3 is designed in such a way that there is no opening along an imaginary lateral surface around the axis of rotation of the spinning rotor 2 through the largest outer diameter of the spinning rotor, with the exception of the narrow gap between the spinning rotor 2 and the rear wall 3.

In der in Fig. 1 dargestellten Offenend-Spinneinrichtung ist der Aufsatz 10 konusförmig. Der Durchmesser des rotationssymmetrischen Aufsatzes 10 nimmt vom Spinnrotor 2 zur rückwärtigen Begrenzungswand 11 zu. Der Aufsatz 10 kann auch zylindrisch ausgebildet sein.in the in 1 illustrated open-end spinning device, the attachment 10 is conical. The diameter of the rotationally symmetrical attachment 10 increases from the spinning rotor 2 to the rear boundary wall 11 . The attachment 10 can also be cylindrical.

Die Fig. 2 zeigt eine erfindungsgemäße Offenend-Spinneinrichtung. Die Offenend-Spinneinrichtung der Fig. 2 entspricht im Wesentlichen der Offenend-Spinneinrichtung der Fig. 1. Die beiden Spinneinrichtungen unterscheiden sich in der Ausbildung des Aufsatzes 10. Der Aufsatz 10 der Fig. 2 erstreckt sich nämlich erfindungsgemäß bis zu den seitlichen Begrenzungswänden 12 des Rotorgehäuses 1.The 2 shows an open-end spinning device according to the invention. The open-end spinning device 2 essentially corresponds to the open-end spinning device 1 . The two spinning devices differ in the design of the article 10. The article 10 of the 2 namely, according to the invention, extends up to the lateral boundary walls 12 of the rotor housing 1.

Die nicht erfindungsgemäße Ausführungsform der Fig. 3 verzichtet auf einen wechselbaren Aufsatz 10. Das Rotorgehäuse ist einstückig aufgebaut. Die Rückwand 3 des Rotorgehäuse 1 entspricht damit der rückwärtigen Begrenzungswand 11. Ansonsten entspricht Form und Aufbau der Offenend-Spinneinrichtung der Fig. 2.The non-inventive embodiment of 3 dispenses with an exchangeable attachment 10. The rotor housing is constructed in one piece. The rear wall 3 of the rotor housing 1 thus corresponds to the rear boundary wall 11. Otherwise, the shape and structure of the open-end spinning device corresponds to FIG 2 .

Die Fig. 4 zeigt eine nicht erfindungsgemäße Variante ohne Aufsatz 10. Anderes als bei den vorigen Ausführungsbeispielen setzt sich der Spalt 6 am größten Außendurchmesser des Spinnrotors 3 nicht entlang der Außenkante 8 des Spinnrotors fort. Die Rückwand 3 des Rotorgehäuses 1 und der Rotorboden 9 sind jedoch so ausgebildet, dass sich der Spalt 6 entlang des Rotorbodens fortsetzt. Diese Ausbildung ermöglicht es auch ohne wechselbaren Aufsatz 10 Spinnrotoren 2 mit verschiedenen Durchmessern in das Rotorgehäuse 1 einzusetzen. Die Spinnrotoren 2 müssen dazu am Rotorboden 9 lediglich den gleichen Neigungswinkel aufweisen.The 4 shows a variant not according to the invention without attachment 10. In contrast to the previous exemplary embodiments, gap 6 at the largest outer diameter of spinning rotor 3 does not continue along outer edge 8 of the spinning rotor. However, the rear wall 3 of the rotor housing 1 and the rotor base 9 are designed in such a way that the gap 6 continues along the rotor base. This design makes it possible to use spinning rotors 2 with different diameters in the rotor housing 1 without an exchangeable attachment. For this purpose, the spinning rotors 2 only have to have the same angle of inclination on the rotor base 9 .

Die Fig. 5 zeigt eine Variante einer erfindungsgemäßen Offenend-Spinneinrichtung mit einem anderen Spinnrotor 2. Erfindungsgemäß ist auch hier am größten Außendurchmesser des Spinnrotors 2 ein enger Spalt 6 von weniger als 2 mm Spaltbreite zwischen dem Spinnrotor 2 und der Rückwand 3 des Rotorgehäuses 1 vorhanden. Wie bei vorigen Ausführungsformen setzt sich der Spalt 6 auch entlang des Rotorbodens 9 fort. Allerdings ist die Spaltbreite am Rotorboden 9 größer als am größten Außendurchmesser des Spinnrotors 2. Hier wird nochmal deutlich, dass es bei der vorliegenden Erfindung darauf ankommt, dass der Bereich hinter dem Spinnrotor abgeschirmt beziehungsweise abgedeckt ist. Es kommt nicht darauf an, dass der Bereich hinter dem Spinnrotor 2 durch das Rotorgehäuse 1 ausgefüllt ist.The figure 5 shows a variant of an open-end spinning device according to the invention with a different spinning rotor 2. According to the invention, there is also a narrow gap 6 of less than 2 mm gap width between the spinning rotor 2 and the rear wall 3 of the rotor housing 1 at the largest outer diameter of the spinning rotor 2. As in the previous embodiments, the gap 6 also continues along the rotor base 9 . However, the gap width at the rotor base 9 is larger than at the largest outer diameter of the spinning rotor 2. Here it becomes clear again that it is important in the present invention that the area behind the spinning rotor is shielded or covered. It is not important that the area behind the spinning rotor 2 is filled with the rotor housing 1 .

BezugszeichenlisteReference List

11
Rotorgehäuserotor housing
22
Spinnrotorspinning rotor
33
Rückwand des Rotorgehäusesrear wall of the rotor housing
44
Durchtrittsöffnungpassage opening
55
Rotorschaftrotor shaft
66
Spaltgap
77
Bereich hinter dem SpinnrotorArea behind the spinning rotor
88th
Außenkante des Spinnrotorsouter edge of the spinning rotor
99
Rotorbodenrotor bottom
1010
Aufsatzessay
1111
Rückwärtige BegrenzungswandRear boundary wall
1212
Seitliche BegrenzungswandLateral boundary wall
1313
Spinntassespinning cup
1414
Ringförmiger WandabschnittAnnular wall section

Claims (6)

  1. An open-end spinning device comprising a rotor housing (1) which can be acted upon by negative pressure and a spinning rotor (2), the rotor housing (1) is open towards the front and can be closed by a cover element, to the rear the rotor housing (1) has a rear wall (3) with a passage opening (4) for a rotor shaft (5) of the spinning rotor (2), the rear wall (3) of the rotor housing (1) is designed in such a manner that the area (7) behind the spinning rotor (2) is covered inside the rotor housing (1)
    characterised in that
    at the largest outer diameter of the spinning rotor (2) there is a narrow gap (6) of less than 2 mm gap width between the spinning rotor (2) and the rear wall (3) of the rotor housing (1), that the rear wall (3) of the rotor housing (1) is at least partially formed by an exchangeable attachment (10) which rests on a rear boundary wall (11) of the rotor housing (1), and that the attachment (10) extends to the lateral boundary walls (12) of the rotor housing (1).
  2. The open-end spinning device according to Claim 1, characterised in that the spinning rotor (2) has a rotor bottom (9) facing the rear wall (3) of the rotor housing (1) and the narrow gap (6) continues at least partially along the rotor bottom (9).
  3. The open-end spinning device according to one of Claims 1 or 2, characterised in that the spinning rotor (2) has an outer edge (8) on the largest outer diameter and the narrow gap (6) continues axially along the outer edge (8).
  4. The open-end spinning device according to one of the Claims 1 to 3, characterised in that the attachment (10) forms the narrow gap (6) with the spinning rotor (2) at the largest outer diameter of the spinning rotor (2).
  5. The open-end spinning device according to one of Claims 1 to 4, characterised in that the attachment (10) is designed to be conical or cylindrical.
  6. The open-end spinning device according to one of Claims 1 to 5, characterised in that the attachment (10) is fastened to a boundary wall (11, 12) of the rotor housing (1) by means of a clip connection, a screw connection, a magnetic force or a press fit.
EP18188483.4A 2017-08-11 2018-08-10 Open-end spinning machine Active EP3461937B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017118390.6A DE102017118390A1 (en) 2017-08-11 2017-08-11 Open-end spinning device

Publications (3)

Publication Number Publication Date
EP3461937A2 EP3461937A2 (en) 2019-04-03
EP3461937A3 EP3461937A3 (en) 2019-05-08
EP3461937B1 true EP3461937B1 (en) 2023-04-19

Family

ID=65084265

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Country Link
US (1) US11066760B2 (en)
EP (1) EP3461937B1 (en)
CN (1) CN109518316A (en)
DE (1) DE102017118390A1 (en)

Families Citing this family (2)

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Publication number Priority date Publication date Assignee Title
DE102020104627A1 (en) * 2020-02-21 2021-08-26 Saurer Spinning Solutions Gmbh & Co. Kg Shaft bearing for mounting a spinning rotor of a rotor spinning machine
DE102020104883A1 (en) * 2020-02-25 2021-08-26 Saurer Spinning Solutions Gmbh & Co. Kg Guard ring and drive device with a guard ring

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Also Published As

Publication number Publication date
DE102017118390A1 (en) 2019-02-14
US20190048492A1 (en) 2019-02-14
EP3461937A2 (en) 2019-04-03
CN109518316A (en) 2019-03-26
US11066760B2 (en) 2021-07-20
EP3461937A3 (en) 2019-05-08

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