EP3106550A1 - Spinning rotor for an open-end spinning device working with high rotor speeds - Google Patents

Spinning rotor for an open-end spinning device working with high rotor speeds Download PDF

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Publication number
EP3106550A1
EP3106550A1 EP16001025.2A EP16001025A EP3106550A1 EP 3106550 A1 EP3106550 A1 EP 3106550A1 EP 16001025 A EP16001025 A EP 16001025A EP 3106550 A1 EP3106550 A1 EP 3106550A1
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EP
European Patent Office
Prior art keywords
rotor
spinning
cup
open
speeds
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Granted
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EP16001025.2A
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German (de)
French (fr)
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EP3106550B1 (en
Inventor
Lothar Winzen
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Saurer Spinning Solutions GmbH and Co KG
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Saurer Germany GmbH and Co KG
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Publication of EP3106550A1 publication Critical patent/EP3106550A1/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
    • D01H4/10—Rotors

Definitions

  • the invention relates to a spinning rotor for a working with high rotor speeds open-end spinning device with a rotor cup having a rotor bottom and an opening and has a designed as a fiber sliding wall wall portion.
  • spinning rotors of open-end spinning devices usually have a rotor shaft for supporting and driving the spinning rotor and a rotor cup arranged on the rotor shaft for producing a yarn.
  • the spinning rotors are increasingly equipped with a single drive and, for example, magnetically supported.
  • the rotor shaft is usually formed in two parts, that is, the rotor shaft consists of a front part on which the rotor cup is fixed, and a rear part, which has the rotor-side components of the drive and the magnetic bearing of the spinning rotor ,
  • the two rotor shaft parts are connected to each other during the spinning operation via a coupling device and, if necessary, detachable from each other.
  • spinning rotors which are used in modern open-end rotor spinning machines and are designed accordingly for high operating speeds.
  • These known spinning rotors have rotor cups, which are each rotated from full material and have an aerodynamically advantageously formed outer surface.
  • the rotor cups of these spinning rotors have an annular wall portion, which is formed so that the thickness of the wall portion from the opening of the rotor cup in the direction of the rotor bottom constantly increases slightly.
  • the rotor bottom of these spinning rotors is designed so that the cross section of the rotor bottom increases from outside to inside. That is, such spinning rotors have their greatest thickness in the region of a central connecting collar, in which the front part of the rotor shaft is mounted.
  • Spinning rotors which can be operated with very high operating speeds and are characterized by a good economy, are also due to the DE 10 2005 021 920 A1 and the DE 10 2007 007 260 A1 known.
  • various joining methods are described with which in a spinning rotor, which is driven by a single motor and magnetically mounted, the rotor cup can be reliably connected to an associated rotor shaft part.
  • the rotor cups of these spinning rotors are characterized by a weight-optimized construction, wherein the rotor shaft is formed in two parts.
  • connection means which at least partially encapsulate through a connecting element formed as a cast part become.
  • the casting then forms a positive connection between the front rotor shaft part and the rotor cup.
  • spinning rotors are known whose rotor cups are produced by chipless deformation.
  • these known spinning rotors serves as a starting material for the rotor cup a cold-rolled fine steel sheet, which is formed by means of appropriate tools to a rotor cup.
  • the reinforcement is formed either as a crimp arranged in the region of the rotor cup opening, or as a ring which is placed on the outer circumference of the rotor cup in the area of the rotor cup opening.
  • the present invention seeks to develop rotational speed fixed spinning rotors, that is, spinning rotors, with which high speeds> 150 000 min -1 can be realized easily and reliably.
  • a spinning rotor which is characterized in that the rotor cup in the transition region between the rotor bottom and the annular wall portion has a pointing away from the opening of the rotor cup support collar.
  • the rotor bottom may preferably have a connection collar for fastening the rotor shaft.
  • the rotor bottom may be formed integrally with the rotor shaft.
  • the annular wall portion may be formed thin-walled with a wall thickness of less than 1.5 mm.
  • the support collar is designed as a rotationally symmetrical ring. Such a design can ensure that during the operation of the spinning rotor by the support collar no unilaterally acting centrifugal forces are generated, which would lead to an additional material stress of the rotor cup.
  • the support collar has a substantially triangular cross-sectional area and is integrally formed on the back of the rotor bottom of the rotor cup.
  • the support collar has a depth which corresponds to less than one third of the length of the rotor cup. That is, in practice, the depth of the support collar is preferably between 2 and 5 mm.
  • FIG. 1 is an open-end spinning device 1 with a magnetically mounted and single motor driven spinning rotor 3 is shown.
  • Such open-end spinning devices 1 are known per se and for example in the EP 0 972 868 A2 described in relative detail.
  • Such open-end spinning devices 1 each have a rotor housing 2, in which rotates the rotor cup 26 of a spinning rotor 3 at high speed.
  • the spinning rotor 3 is preferably driven by an electromotive single drive 18 and is supported with its rotor shaft 4 in the front 27 and rear 28 bearings a magnetic bearing assembly 5, which position the spinning rotor 3 both in the radial and in the axial direction.
  • the rotor housing 2 which is open towards the front, is closed during spinning by a pivotally mounted cover element 8 and connected via a corresponding pneumatic line 10 to a vacuum source 11, which generates the spinning vacuum required in the rotor housing 2.
  • a so-called channel plate adapter 12 which has the yarn draw-off nozzle 13 and the mouth region of the fiber guide channel 14, is embedded in the cover element 8.
  • a thread withdrawal tube 15 At the thread take-off nozzle 13 is followed, as usual, a thread withdrawal tube 15 at.
  • the cover element 8 On the lid member 8, which is mounted rotatably limited about a pivot axis 16, also an opening cylinder housing 17 is fixed. Furthermore, the cover element 8 has rear bearing brackets 19, 20 for mounting an opening roller 21 or a sliver feed cylinder 22.
  • the opening roller 21 is thereby driven in the region of its whorl 23 by a rotating, machine-long tangential belt 24, while the drive (not shown) of the sliver feed cylinder 22 is preferably via a worm gear arrangement, which is connected to a machine-length drive shaft 25.
  • the opening roller 21 and / or the sliver feed cylinder 22 can of course also each be driven by a single drive, for example a stepping motor.
  • a single drive for example a stepping motor.
  • the spinning rotor 3 of the open-end spinning device 1 is driven by a single electric motor drive 18, the rotor-side component is designated by the reference numeral 33.
  • the rotor shaft 4 of such spinning rotors in two parts. That is, the rotor shaft 4 has, as shown in the embodiment, a rear rotor shaft portion 4A equipped with the rotor-side magnetic bearing components of the front and rear bearings 27, 28 and a front rotor shaft portion 4B to which the rotor cup 26 is fixed.
  • the rotor shaft portion 4B to which the rotor cup 26 of the spinning rotor 3 is fixed, via a non-rotatable connector, if necessary, releasably connected to the rotor shaft part 4A. That is, the rotor cup 26 of the spinning rotor 3 which is inextricably connected to the front rotor shaft portion 4A is, as in FIG FIG. 2 represented connected via a generally designated by the reference numeral 29 coupling device with the rear rotor shaft portion 4B.
  • the coupling device 29 consists for example of a magnetic device 32 for the axial fixing of the components 4A, 4B and a mechanical anti-rotation 35, 36th
  • the trained as a relatively thin-walled construction rotor cup 26 has in the region of its rotor base 6 a connecting collar 7 with a bore 41 in which, preferably via a press fit, which is designed as a connecting bolt, front rotor shaft portion 4A is fixed.
  • the rotor shaft portion 4A is preferably made at least in its end region of a ferromagnetic material and divided into two sections of approximately equal length, preferably a cylindrical guide portion 38 and formed as an external polygon 36 section.
  • a receiving sleeve 34 is further defined, which has a rotatably mounted inner polygon 35 and a permanent magnet insert 32.
  • the rotor shaft portion 4B also has a cylindrical bore 37, which in the installed state corresponds to the guide portion 38 of the front rotor shaft portion 4A.
  • the rotor cup 26 as usual, a front-side opening 30, a beginning at the opening 30, diverging to the rear, acting as a fiber sliding wall section 31 and a rotor bottom 6 with a molded connection collar 7.
  • the rotor cup 26 is formed overall as a relatively thin-walled component and has in the region of the wall portion 31 has a nearly constant wall thickness, while in the region of the rotor bottom 6, the wall thickness increases from outside to inside.
  • a connecting collar 7 is integrally formed on the rotor bottom 6, which has a bore 41 for receiving the front rotor shaft portion 4B. That is, in the bore 41 of the connection collar 7, preferably via a press fit, designed as a connecting bolt, front rotor shaft portion 4B set.
  • the rotor cup 26 further has, in the connection region between the wall section 31 and the rotor bottom 6, a support collar 9 according to the invention facing away from the opening of the rotor cup.
  • This support collar 9 is advantageously designed as a rotationally symmetrical ring and has a substantially triangular cross-sectional area (Q).
  • the support collar 9 is integrally formed on the back 39 of the rotor base 6 of the rotor cup 26 and preferably has a depth (T SK) , which corresponds to less than one third of the length (L) of the rotor cup 26.
  • the depth (T SK) of the support collar 9 is preferably between 2 and 5 mm.

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

Abstract

Die Erfindung betrifft einen Spinnrotor (3) für eine insbesondere mit hohen Rotordrehzahlen arbeitende Offenend-Spinnvorrichtung (1), mit einer Rotortasse (26), die einen Rotorboden (6) sowie eine Öffnung (30) aufweist und über einen als Faserrutschwand ausgebildeten, ringförmigen Wandabschnitt (31) verfügt. Erfindungsgemäß ist vorgesehen, dass die Rotortasse (26) im Übergangsbereich zwischen dem Rotorboden (6) und dem ringförmigen Wandabschnitt (31) einen von der Öffnung (30) der Rotortasse (26) weg weisenden Stützkragen (9) aufweist.The invention relates to a spinning rotor (3) for an open-end spinning device (1) which operates in particular at high rotor speeds, with a rotor cup (26) which has a rotor bottom (6) and an opening (30) and an annular, designed as a fiber sliding wall Wall section (31) has. According to the invention, the rotor cup (26) has a support collar (9) pointing away from the opening (30) of the rotor cup (26) in the transition region between the rotor bottom (6) and the annular wall section (31).

Description

Die Erfindung betrifft einen Spinnrotor für eine mit hohen Rotordrehzahlen arbeitende Offenend-Spinnvorrichtung mit einer Rotortasse, die einen Rotorboden sowie eine Öffnung aufweist und über einen als Faserrutschwand ausgebildeten, ringförmigen Wandabschnitt verfügt.The invention relates to a spinning rotor for a working with high rotor speeds open-end spinning device with a rotor cup having a rotor bottom and an opening and has a designed as a fiber sliding wall wall portion.

Wie bekannt und in zahlreichen Patentschriften ausführlich beschrieben, weisen Spinnrotoren von Offenend-Spinnvorrichtungen in der Regel einen Rotorschaft zum Lagern und Antreiben des Spinnrotors sowie eine am Rotorschaft angeordnete Rotortasse zum Herstellen eines Fadens auf.
Bei Offenend-Spinnvorrichtungen, die mit hohen Drehzahlen von zum Beispiel > 130 000 min-1 arbeiten, sind die Spinnrotoren zunehmend mit einem Einzelantrieb ausgestattet und beispielsweise magnetisch gelagert.
Bei solchen einzelmotorisch angetriebenen Spinnrotoren ist außerdem der Rotorschaft in der Regel zweiteilig ausgebildet, das heißt, der Rotorschaft besteht aus einem vorderen Teil, an dem die Rotortasse festgelegt ist, und einem hinteren Teil, das die rotorseitigen Komponenten des Antriebes und die Magnetlagerung des Spinnrotors aufweist.
Die beiden Rotorschaftteile sind während des Spinnbetriebes über eine Kupplungsvorrichtung miteinander verbunden und bei Bedarf voneinander lösbar.As is known and described in detail in numerous patent specifications, spinning rotors of open-end spinning devices usually have a rotor shaft for supporting and driving the spinning rotor and a rotor cup arranged on the rotor shaft for producing a yarn.
In open-end spinning devices that operate at high speeds of, for example,> 130 000 min -1 , the spinning rotors are increasingly equipped with a single drive and, for example, magnetically supported.
In such single-motor driven spinning rotors also the rotor shaft is usually formed in two parts, that is, the rotor shaft consists of a front part on which the rotor cup is fixed, and a rear part, which has the rotor-side components of the drive and the magnetic bearing of the spinning rotor ,
The two rotor shaft parts are connected to each other during the spinning operation via a coupling device and, if necessary, detachable from each other.

Da derartige Spinnrotoren nach jeder Spinnunterbrechung neu auf ihre Betriebsdrehzahl beschleunigt werden müssen und die Betriebsdrehzahlen solcher moderner Offenend-Rotorspinnmaschinen, wie vorstehend angedeutet, > 150.000 min-1 liegen können, ist es vorteilhaft, wenn die rotierenden Teile einer Offenend-Rotorspinnvorrichtung ein möglichst geringes Trägheitsmoment aufweisen, das heißt, wenn die Spinnrotoren möglichst leicht gebaut sind.
Die hohen Betriebsdrehzahlen moderner Offenend-Rotorspinnmaschinen stellen entsprechend recht hohe Anforderungen an die Spinnrotoren, sowohl was deren Rundlauf und Lagerung, als auch was deren Drehzahlfestigkeit betrifft.Since such spinning rotors must be re-accelerated to their operating speed after each spin interruption and the operating speeds of such modern open-end rotor spinning machines, as indicated above,> 150,000 min -1 can, it is advantageous if the rotating parts of an open-end rotor spinning a minimum inertia that is, when the spinning rotors are as lightweight as possible.
The high operating speeds of modern open-end rotor spinning machines make quite high demands on the spinning rotors, both in terms of their concentricity and storage, as well as their speed resistance.

In der DE 199 10 277 B4 sind Spinnrotoren beschrieben, die in modernen Offenend-Rotorspinnmaschinen zum Einsatz kommen und entsprechend für hohe Betriebsdrehzahlen konzipiert sind.
Diese bekannten Spinnrotoren weisen Rotortassen auf, die jeweils aus vollem Material gedreht sind und über eine aerodynamisch vorteilhaft ausgebildete Außenfläche verfügen. Die Rotortassen dieser Spinnrotoren weisen einen ringförmigen Wandabschnitt auf, der so ausgebildet ist, dass die Dicke des Wandabschnittes von der Öffnung der Rotortasse in Richtung auf den Rotorboden hin ständig etwas zunimmt.
Auch der Rotorboden dieser Spinnrotoren ist so gestaltet, dass der Querschnitt des Rotorbodens von außen nach innen zunimmt. Das heißt, derartige Spinnrotoren weisen im Bereich eines zentralen Anschlussbundes, in dem der vordere Teil des Rotorschaftes gelagert ist, ihre größte Dicke auf.In the DE 199 10 277 B4 are described spinning rotors, which are used in modern open-end rotor spinning machines and are designed accordingly for high operating speeds.
These known spinning rotors have rotor cups, which are each rotated from full material and have an aerodynamically advantageously formed outer surface. The rotor cups of these spinning rotors have an annular wall portion, which is formed so that the thickness of the wall portion from the opening of the rotor cup in the direction of the rotor bottom constantly increases slightly.
Also, the rotor bottom of these spinning rotors is designed so that the cross section of the rotor bottom increases from outside to inside. That is, such spinning rotors have their greatest thickness in the region of a central connecting collar, in which the front part of the rotor shaft is mounted.

In der Praxis zeichnen sich derartige Spinnrotoren durch eine hohe Effektivität aus, allerdings ergeben sich bei sehr hohen Drehzahlen der Spinnrotoren durch die auftretenden Zentrifugalkräfte im Bereich der Rotortassen oft große Materialspannungen.In practice, such spinning rotors are characterized by a high degree of effectiveness, but at very high rotational speeds of the spinning rotors, large material stresses often result due to the centrifugal forces occurring in the region of the rotor cups.

Spinnrotoren, die mit sehr hohen Betriebsdrehzahlen betrieben werden können und sich durch eine gute Wirtschaftlichkeit auszeichnen, sind auch durch die DE 10 2005 021 920 A1 und die DE 10 2007 007 260 A1 bekannt.
In diesen Literaturstellen sind verschiedene Fügeverfahren beschrieben, mit denen bei einem Spinnrotor, der einzelmotorisch angetrieben und magnetisch gelagert ist, die Rotortasse zuverlässig an ein zugehöriges Rotorschaftteil angeschlossen werden kann. Die Rotortassen dieser Spinnrotoren zeichnen sich dabei durch eine gewichtsoptimierte Bauweise aus, wobei der Rotorschaft zweiteilig ausgebildet ist.
Das heißt, bei diesen bekannten Spinnrotoren weist ein erstes Rotorschaftteil die rotor-seitigen Komponenten des Spinnrotorantriebes und der Spinnrotorlagerung auf, während an einem zweiten Rotorschaftteil, das bei Bedarf auswechselbar im ersten Rotorschaftteil gelagert ist, die Rotortasse festgelegt ist.Spinning rotors, which can be operated with very high operating speeds and are characterized by a good economy, are also due to the DE 10 2005 021 920 A1 and the DE 10 2007 007 260 A1 known.
In these references, various joining methods are described with which in a spinning rotor, which is driven by a single motor and magnetically mounted, the rotor cup can be reliably connected to an associated rotor shaft part. The rotor cups of these spinning rotors are characterized by a weight-optimized construction, wherein the rotor shaft is formed in two parts.
That is, in these known spinning rotors, a first rotor shaft part on the rotor-side components of the spinning rotor drive and the spinning rotor bearing, while on a second rotor shaft part, which is interchangeably stored when needed in the first rotor shaft part, the rotor cup is fixed.

Gemäß DE 10 2005 021 920 A1 weisen beispielsweise der vordere Teil des Rotorschaftes und die relativ dünnwandig ausgebildete Rotortasse Anschlussmittel auf, die durch ein als Gussteil ausgebildetes Verbindungselement zumindest teilweise um-gossen werden. Im erkalteten Zustand bildet das Gussteil dann eine formschlüssige Verbindung zwischen dem vorderen Rotorschaftteil und der Rotortasse.According to DE 10 2005 021 920 A1 For example, the front part of the rotor shaft and the relatively thin-walled rotor cup have connection means which at least partially encapsulate through a connecting element formed as a cast part become. In the cooled state, the casting then forms a positive connection between the front rotor shaft part and the rotor cup.

In der DE 10 2007 007 260 A1 ist ein Fügeverfahren beschrieben, bei dem die dünnwandige Rotortasse eines Spinnrotors über eine Klebeverbindung direkt oder indirekt drehfest an ein vorderes Rotorschaftteil angeschlossen werden kann.
Durch eine solche Klebeverbindung wird auf relativ einfache Weise eine deutliche Masseneinsparung gegenüber den bislang üblichen Verbindungsarten erzielt, mit der Folge, dass solchermaßen hergestellte Spinnrotoren relativ leicht sind und damit gut beschleunigt und abgebremst werden können.In the DE 10 2007 007 260 A1 a joining method is described in which the thin-walled rotor cup of a spinning rotor can be connected directly or indirectly non-rotatably to a front rotor shaft part via an adhesive connection.
By means of such an adhesive connection, a significant mass saving compared to the previously customary types of connection is achieved in a relatively simple manner, with the result that spinning rotors produced in this way are relatively light and can thus be well accelerated and decelerated.

Die durch den Einsatz einer erfindungsgemäßen Klebeverbindung erzielbare Reduzierung des Massenträgheitsmoments des Spinnrotors wirkt sich nicht nur positiv auf das Beschleunigungsverhalten des Spinnrotors aus, sondern die Reduzierung des Gewichts der Spinnrotoren führt auch zu einer Minderung des Energieverbrauchs, was bei einer Textilmaschine mit einer Vielzahl von Arbeitsstellen zu einer spürbaren Kosteneinsparung pro Maschine führt.The achievable by the use of an adhesive bond invention reduction of the moment of inertia of the spinning rotor not only has a positive effect on the acceleration behavior of the spinning rotor, but the reduction in the weight of the spinning rotors also leads to a reduction in energy consumption, which in a textile machine with a variety of jobs a noticeable cost saving per machine leads.

Wie vorstehend angedeutet, ist bei derartigen Spinnrotoren, insbesondere bei sehr hohen Drehzahlen, das Material der Rotortassen großen Materialspannungen ausgesetzt.As indicated above, in such spinning rotors, especially at very high speeds, the material of the rotor cups is exposed to large material stresses.

Um eine Überlastung des Rotortassenmaterials durch die auftretenden Zentrifugalkräfte zu verhindern, sind deshalb in der Praxis die Drehzahlen, mit denen derartige Spinnrotoren betrieben werden dürfen, auf beispielsweise 150 000 min-1 begrenzt.To prevent an overload of the rotor cup material by the occurring centrifugal forces, are therefore in practice the speeds at which such spinning rotors can be operated is limited to for example, 150 000 min -1.

Durch die EP 0 154 358 A2 sind des Weiteren Spinnrotoren bekannt, deren Rotortassen durch spanlose Verformung hergestellt werden. Bei diesen bekannten Spinnrotoren dient als Ausgangsmaterial für die Rotortasse ein kaltgewalztes Feinstahlblech, das mittels entsprechender Werkzeuge zu einer Rotortasse geformt wird.By the EP 0 154 358 A2 Furthermore, spinning rotors are known whose rotor cups are produced by chipless deformation. In these known spinning rotors serves as a starting material for the rotor cup a cold-rolled fine steel sheet, which is formed by means of appropriate tools to a rotor cup.

Da bei solchen durch spanlose Verformung hergestellten Rotortassen die Gefahr besteht, dass es aufgrund der bei hohen Drehzahlen der Spinnrotoren auftretenden großen Zentrifugalkräfte zu Verformungen der Rotortassen kommt, verfügen die Rotortassen solcher Spinnrotoren außerdem im Bereich der Rotortassenöffnung über eine Verstärkung.Since in such produced by chipless deformation rotor cups there is a risk that it comes due to the large centrifugal forces occurring at high speeds of the spinning rotors to deformations of the rotor cups, have the Rotor cups such spinning rotors also in the rotor cup opening via a gain.

Die Verstärkung ist dabei entweder als eine im Bereich der Rotortassenöffnung angeordnete Bördelung ausgebildet, oder als Ring, der im Bereich der Rotortassenöffnung auf den Außenumfang der Rotortasse aufgesetzt ist.The reinforcement is formed either as a crimp arranged in the region of the rotor cup opening, or as a ring which is placed on the outer circumference of the rotor cup in the area of the rotor cup opening.

Auch bei diesen Spinnrotoren sind, um Überlastungen des Rotortassenmaterials durch auftretende Zentrifugalkräfte zu verhindern, die Drehzahlen, mit denen derartige Spinnrotoren betrieben werden dürfen, begrenzt.Even with these spinning rotors are to prevent overloading of the rotor cup material by occurring centrifugal forces, the speeds at which such spinning rotors may be operated limited.

Ausgehend vom vorgenannten Stand der Technik liegt der Erfindung die Aufgabe zugrunde, drehzahlfeste Spinnrotoren zu entwickeln, das heißt, Spinnrotoren, mit denen problemlos und zuverlässig hohe Drehzahlen > 150 000 min-1 realisierbar sind.Based on the aforementioned prior art, the present invention seeks to develop rotational speed fixed spinning rotors, that is, spinning rotors, with which high speeds> 150 000 min -1 can be realized easily and reliably.

Diese Aufgabe wird erfindungsgemäß durch einen Spinnrotor gelöst, der dadurch gekennzeichnet ist, dass die Rotortasse im Übergangsbereich zwischen dem Rotorboden und dem ringförmigen Wandabschnitt einen von der Öffnung der Rotortasse weg weisenden Stützkragen aufweist. Der Rotorboden kann in bevorzugter Weise einen Anschlussbund zum Befestigen des Rotorschafts aufweisen. Alternativ dazu kann der Rotorboden mit dem Rotorschaft einstückig ausgebildet sein. Weiterhin bevorzugt kann der ringförmige Wandabschnitt dünnwandig mit einer Wandstärke von weniger als 1,5 mm ausgebildet sein. Dadurch kann das Trägheitsmoment des Spinnrotors vorteilhaft reduziert werden.This object is achieved by a spinning rotor, which is characterized in that the rotor cup in the transition region between the rotor bottom and the annular wall portion has a pointing away from the opening of the rotor cup support collar. The rotor bottom may preferably have a connection collar for fastening the rotor shaft. Alternatively, the rotor bottom may be formed integrally with the rotor shaft. Further preferably, the annular wall portion may be formed thin-walled with a wall thickness of less than 1.5 mm. As a result, the moment of inertia of the spinning rotor can be advantageously reduced.

In ausführlichen Versuchen, speziell anhand von Finite Elemente Analysen, wurde ermittelt, dass bei erfindungsgemäß ausgebildeten Spinnrotoren die bei hohen Rotordrehzahlen auftretenden maximalen Materialspannungen deutlich niedriger sind, als bei Spinnrotoren, wie sie aus dem Stand der Technik bekannt sind.
Das heißt, die erfindungsgemäße Ausbildung von Spinnrotoren hat den Vorteil, dass mit solchen Spinnrotoren problemlos und sicher hohe Rotordrehzahlen von über 150 000 min-1 realisierbar sind, ohne dass bei den Spinnrotoren gefährliche Materialspannungen auftreten.In detailed experiments, especially on the basis of finite element analyzes, it has been found that with spinning rotors according to the invention, the maximum material stresses occurring at high rotor speeds are significantly lower than in spinning rotors, as known from the prior art.
That is, the inventive design of spinning rotors has the advantage that with such spinning rotors easily and safely high rotor speeds of over 150 000 min -1 can be realized without dangerous material stresses occur in the spinning rotors.

In vorteilhafter Ausführungsform ist der Stützkragen als rotationssymmetrischer Ring ausgebildet. Durch eine solche Ausbildung kann sichergestellt werden, dass während des Betriebes des Spinnrotors durch den Stützkragen keinerlei einseitig wirkende Fliehkräfte erzeugt werden, die zu einer zusätzlichen Materialbeanspruchung der Rotortasse führen würden.
Vorzugsweise weist der Stützkragen eine im Wesentlichen dreiecksförmige Querschnittsfläche auf und ist einstückig an die Rückseite des Rotorbodens der Rotortasse angeformt.In an advantageous embodiment, the support collar is designed as a rotationally symmetrical ring. Such a design can ensure that during the operation of the spinning rotor by the support collar no unilaterally acting centrifugal forces are generated, which would lead to an additional material stress of the rotor cup.
Preferably, the support collar has a substantially triangular cross-sectional area and is integrally formed on the back of the rotor bottom of the rotor cup.

Durch einen solchen Stützkragen mit dreiecksförmiger Querschnittsfläche wird erreicht, dass auch bei sehr hohen Rotordrehzahlen die Materialspannungen in den gefährdeten Bereichen des Spinnrotors in vertretbaren Grenzen gehalten werden. Die sich durch den Stützkragen ergebende Gewichtszunahme des Spinnrotors und damit dessen Trägheitsmoment ändern sich lediglich geringfügig.By such a support collar with triangular cross-sectional area is achieved that even at very high rotor speeds, the material stresses in the vulnerable areas of the spinning rotor are kept within reasonable limits. The resulting by the support collar weight gain of the spinning rotor and thus its moment of inertia change only slightly.

In vorteilhafter Ausführungsform weist der Stützkragen eine Tiefe auf, die weniger als ein Drittel der Länge der Rotortasse entspricht. Das heißt, in der Praxis beträgt die Tiefe des Stützkragens vorzugsweise zwischen 2 und 5 mm.In an advantageous embodiment, the support collar has a depth which corresponds to less than one third of the length of the rotor cup. That is, in practice, the depth of the support collar is preferably between 2 and 5 mm.

Durch einen solchermaßen dimensionierten Stützkragen wird gewährleistet, dass die Spinnrotoren jetzt auch bei Drehzahlen von > 150 000 -1 betriebssicher sind, wobei gleichzeitig der Energieverbrauch der Textilmaschine in vertretbaren Grenzen gehalten werden kann.By such a dimensioned support collar ensures that the spinning rotors are now reliable even at speeds of> 150 000 -1 , while the energy consumption of the textile machine can be kept within reasonable limits.

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

Es zeigen:

Fig. 1
in Seitenansicht schematisch eine Offenend-Spinnvorrichtung mit einem einzelmotorisch angetriebenen, magnetisch gelagerten Spinnrotor,
Fig. 2
eine perspektivische Ansicht eines einzelmotorisch angetriebenen Spinnrotors mit einem zweiteiligen Rotorschaft, wobei am vorderen Teil des Rotorschaftes eine erfindungsgemäß ausgebildete Rotortasse festgelegt ist,
Fig. 3
in Seitenansicht sowie im Schnitt eine erfindungsgemäß ausgebildete Rotortasse mit dem zugehörigen vorderen Rotorschaftteil.
Show it:
Fig. 1
in side view schematically an open-end spinning device with a single motor driven, magnetically mounted spinning rotor,
Fig. 2
a perspective view of a single-motor driven spinning rotor with a two-part rotor shaft, wherein an inventively designed rotor cup is set at the front part of the rotor shaft,
Fig. 3
in side view and in section an inventively designed rotor cup with the associated front rotor shaft part.

In Figur 1 ist eine Offenend-Spinnvorrichtung 1 mit einem magnetisch gelagerten und einzelmotorisch angetriebenen Spinnrotor 3 dargestellt.In FIG. 1 is an open-end spinning device 1 with a magnetically mounted and single motor driven spinning rotor 3 is shown.

Derartige Offenend-Spinnvorrichtungen 1 sind an sich bekannt und beispielsweise in der EP 0 972 868 A2 relativ ausführlich beschrieben.
Solche Offenend-Spinnvorrichtungen 1 verfügen jeweils über ein Rotorgehäuse 2, in dem die Rotortasse 26 eines Spinnrotors 3 mit hoher Drehzahl umläuft.
Der Spinnrotor 3 wird dabei vorzugsweise durch einen elektromotorischen Einzelantrieb 18 angetrieben und ist mit seinem Rotorschaft 4 in vorderen 27 und hinteren 28 Lagerstellen einer magnetischen Lageranordnung 5 abgestützt, die den Spinnrotor 3 sowohl in radialer als auch in axialer Richtung positionieren.Such open-end spinning devices 1 are known per se and for example in the EP 0 972 868 A2 described in relative detail.
Such open-end spinning devices 1 each have a rotor housing 2, in which rotates the rotor cup 26 of a spinning rotor 3 at high speed.
The spinning rotor 3 is preferably driven by an electromotive single drive 18 and is supported with its rotor shaft 4 in the front 27 and rear 28 bearings a magnetic bearing assembly 5, which position the spinning rotor 3 both in the radial and in the axial direction.

Das nach vorne hin an sich offene Rotorgehäuse 2 ist während des Spinnbetriebes durch ein schwenkbar gelagertes Deckelelement 8 verschlossen und über eine entsprechende Pneumatikleitung 10 an eine Unterdruckquelle 11 angeschlossen, die den im Rotorgehäuse 2 notwendigen Spinnunterdruck erzeugt.The rotor housing 2, which is open towards the front, is closed during spinning by a pivotally mounted cover element 8 and connected via a corresponding pneumatic line 10 to a vacuum source 11, which generates the spinning vacuum required in the rotor housing 2.

In das Deckelelement 8 ist, wie bekannt, ein sogenannter Kanalplattenadapter 12 eingelassen, der die Fadenabzugsdüse 13 sowie den Mündungsbereich des Faserleitkanales 14 aufweist. An die Fadenabzugsdüse 13 schließt sich dabei, wie üblich, ein Fadenabzugsröhrchen 15 an.As is known, a so-called channel plate adapter 12, which has the yarn draw-off nozzle 13 and the mouth region of the fiber guide channel 14, is embedded in the cover element 8. At the thread take-off nozzle 13 is followed, as usual, a thread withdrawal tube 15 at.

Am Deckelelement 8, das um eine Schwenkachse 16 begrenzt drehbar gelagert ist, ist außerdem ein Auflösewalzengehäuse 17 festgelegt. Des Weiteren weist das Deckelelement 8 rückseitige Lagerkonsolen 19, 20 zur Lagerung einer Auflösewalze 21 beziehungsweise eines Faserbandeinzugszylinders 22 auf.On the lid member 8, which is mounted rotatably limited about a pivot axis 16, also an opening cylinder housing 17 is fixed. Furthermore, the cover element 8 has rear bearing brackets 19, 20 for mounting an opening roller 21 or a sliver feed cylinder 22.

Die Auflösewalze 21 wird dabei im Bereich ihres Wirtels 23 durch einen umlaufenden, maschinenlangen Tangentialriemen 24 angetrieben, während der (nicht dargestellte) Antrieb des Faserbandeinzugszylinders 22 vorzugsweise über eine Schneckengetriebeanordnung erfolgt, die auf eine maschinenlange Antriebswelle 25 geschaltet ist.The opening roller 21 is thereby driven in the region of its whorl 23 by a rotating, machine-long tangential belt 24, while the drive (not shown) of the sliver feed cylinder 22 is preferably via a worm gear arrangement, which is connected to a machine-length drive shaft 25.

In alternativer Ausführungsform können die Auflösewalze 21 und/oder der Faserbandeinzugszylinder 22 selbstverständlich auch jeweils über einen Einzelantrieb, beispielsweise einen Schrittmotor, angetrieben werden.
Wie vorstehend bereits angedeutet und in Fig.2 in einem größeren Maßstab dargestellt, wird der Spinnrotor 3 der Offenend-Spinnvorrichtung 1 durch einen elektromotorischen Einzelantrieb 18 angetrieben, dessen rotorseitige Komponente mit der Bezugszahl 33 gekennzeichnet ist.In an alternative embodiment, the opening roller 21 and / or the sliver feed cylinder 22 can of course also each be driven by a single drive, for example a stepping motor.
As already indicated above and in Fig.2 Shown on a larger scale, the spinning rotor 3 of the open-end spinning device 1 is driven by a single electric motor drive 18, the rotor-side component is designated by the reference numeral 33.

Um solche Spinnrotoren 3, insbesondere die einem erhöhten Verschleiß unterworfenen Rotortassen 26, bei Bedarf leicht ausbauen zu können, ist es bekannt, den Rotorschaft 4 derartiger Spinnrotoren zweiteilig auszubilden.
Das heißt, der Rotorschaft 4 weist, wie im Ausführungsbeispiel dargestellt, einen mit den rotorseitigen Magnetlagerkomponenten der vorderen und der hinteren Lagerstelle 27, 28 ausgestatteten hinteren Rotorschaftteil 4A und einen vorderen Rotorschaftteil 4B auf, an dem die Rotortasse 26 befestigt ist.In order to be able to easily remove such spinning rotors 3, in particular the rotor cups 26 subject to increased wear, if necessary, it is known to design the rotor shaft 4 of such spinning rotors in two parts.
That is, the rotor shaft 4 has, as shown in the embodiment, a rear rotor shaft portion 4A equipped with the rotor-side magnetic bearing components of the front and rear bearings 27, 28 and a front rotor shaft portion 4B to which the rotor cup 26 is fixed.

Wie beispielsweise in der DE 100 24 020 A1 ausführlich erläutert ist, ist der Rotorschaftteil 4B, an dem die Rotortasse 26 des Spinnrotors 3 befestigt ist, über eine drehfeste Steckverbindung, bei Bedarf lösbar, an das Rotorschaftteil 4A angeschlossen.
Das heißt, die Rotortasse 26 des Spinnrotors 3, die unlösbar an den vorderen Rotorschaftabschnitt 4A angeschlossen ist, ist, wie in Figur 2 dargestellt, über eine insgesamt mit der Bezugszahl 29 gekennzeichnete Kupplungsvorrichtung mit dem hinteren Rotorschaftabschnitt 4B verbunden.Such as in the DE 100 24 020 A1 is explained in detail, the rotor shaft portion 4B, to which the rotor cup 26 of the spinning rotor 3 is fixed, via a non-rotatable connector, if necessary, releasably connected to the rotor shaft part 4A.
That is, the rotor cup 26 of the spinning rotor 3 which is inextricably connected to the front rotor shaft portion 4A is, as in FIG FIG. 2 represented connected via a generally designated by the reference numeral 29 coupling device with the rear rotor shaft portion 4B.

Die Kupplungsvorrichtung 29 besteht dabei beispielsweise aus einer Magneteinrichtung 32 zur axialen Fixierung der Bauteile 4A, 4B sowie einer mechanischen Verdrehsicherung 35, 36.The coupling device 29 consists for example of a magnetic device 32 for the axial fixing of the components 4A, 4B and a mechanical anti-rotation 35, 36th

Die als relativ dünnwandige Konstruktion ausgebildete Rotortasse 26 weist im Bereich ihres Rotorbodens 6 einen Anschlussbund 7 mit einer Bohrung 41 auf, in der, vorzugsweise über einen Presssitz, der als Anschlussbolzen ausgebildete, vordere Rotorschaftabschnitt 4A festgelegt ist.The trained as a relatively thin-walled construction rotor cup 26 has in the region of its rotor base 6 a connecting collar 7 with a bore 41 in which, preferably via a press fit, which is designed as a connecting bolt, front rotor shaft portion 4A is fixed.

Der Rotorschaftabschnitt 4A ist dabei vorzugsweise wenigstens in seinem Endbereich aus einem ferromagnetischen Material gefertigt und in zwei etwa gleich lange Abschnitte, vorzugsweise einen zylindrischen Führungsabschnitt 38 und einen als Außenmehrkant 36 ausgebildeten Abschnitt unterteilt.
Wie in Figur 2 weiter dargestellt, ist des Weiteren im rohrförmig ausgebildeten, hinteren Rotorschaftabschnitt 4B, beispielsweise ebenfalls über einen Presssitz, eine Aufnahmehülse 34 festgelegt, die einen drehfest angeordneten Innenmehrkant 35 sowie einen Permanentmagneteinsatz 32 aufweist. Der Rotorschaftabschnitt 4B verfügt außerdem über eine zylindrische Bohrung 37, die im Einbauzustand mit dem Führungsabschnitt 38 des vorderen Rotorschaftabschnittes 4A korrespondiert.The rotor shaft portion 4A is preferably made at least in its end region of a ferromagnetic material and divided into two sections of approximately equal length, preferably a cylindrical guide portion 38 and formed as an external polygon 36 section.
As in FIG. 2 Further, in the tubular, rear rotor shaft portion 4B, for example, likewise via a press fit, a receiving sleeve 34 is further defined, which has a rotatably mounted inner polygon 35 and a permanent magnet insert 32. The rotor shaft portion 4B also has a cylindrical bore 37, which in the installed state corresponds to the guide portion 38 of the front rotor shaft portion 4A.

Wie insbesondere aus der Fig.3 ersichtlich, weist die Rotortasse 26, wie üblich, eine frontseitig angeordnete Öffnung 30, einen an der Öffnung 30 beginnenden, nach hinten divergierenden, als Faserrutschwand fungierenden Wandabschnitt 31 sowie einen Rotorboden 6 mit einem angeformten Anschlussbund 7 auf.As in particular from the Figure 3 can be seen, the rotor cup 26, as usual, a front-side opening 30, a beginning at the opening 30, diverging to the rear, acting as a fiber sliding wall section 31 and a rotor bottom 6 with a molded connection collar 7.

Die Rotortasse 26 ist insgesamt als relativ dünnwandiges Bauteil ausgebildet und weist im Bereich des Wandabschnittes 31 eine nahezu konstante Wandstärke auf, während im Bereich des Rotorbodens 6 die Wandstärke von außen nach innen zunimmt.The rotor cup 26 is formed overall as a relatively thin-walled component and has in the region of the wall portion 31 has a nearly constant wall thickness, while in the region of the rotor bottom 6, the wall thickness increases from outside to inside.

Wie vorstehend bereits erläutert, ist an den Rotorboden 6 einstückig ein Anschlussbund 7 angeformt, der eine Bohrung 41 zur Aufnahme des vorderen Rotorschaftabschnittes 4B aufweist. Das heißt, in der Bohrung 41 des Anschlussbundes 7 ist, vorzugsweise über einen Presssitz, der als Anschlussbolzen ausgebildete, vordere Rotorschaftabschnitt 4B festgelegt.As already explained above, a connecting collar 7 is integrally formed on the rotor bottom 6, which has a bore 41 for receiving the front rotor shaft portion 4B. That is, in the bore 41 of the connection collar 7, preferably via a press fit, designed as a connecting bolt, front rotor shaft portion 4B set.

Die Rotortasse 26 verfügt des Weiteren im Anschlussbereich zwischen dem Wandabschnitt 31 und dem Rotorboden 6 über einen von der Öffnung der Rotortasse weg weisenden, erfindungsgemäßen Stützkragen 9.The rotor cup 26 further has, in the connection region between the wall section 31 and the rotor bottom 6, a support collar 9 according to the invention facing away from the opening of the rotor cup.

Dieser Stützkragen 9 ist vorteilhafterweise als rotationssymmetrischer Ring ausgebildet und weist eine im Wesentlichen dreiecksförmige Querschnittsfläche (Q) auf.This support collar 9 is advantageously designed as a rotationally symmetrical ring and has a substantially triangular cross-sectional area (Q).

Wie insbesondere aus den Figuren 2 und 3 ersichtlich, ist der Stützkragen 9 einstückig an die Rückseite 39 des Rotorbodens 6 der Rotortasse 26 angeformt und weist vorzugsweise eine Tiefe (TSK) auf, die weniger als ein Drittel der Länge (L) der Rotortasse 26 entspricht. In der Praxis beträgt die Tiefe (TSK) des Stützkragens 9 vorzugsweise zwischen 2 und 5 mm.As in particular from the FIGS. 2 and 3 can be seen, the support collar 9 is integrally formed on the back 39 of the rotor base 6 of the rotor cup 26 and preferably has a depth (T SK) , which corresponds to less than one third of the length (L) of the rotor cup 26. In practice, the depth (T SK) of the support collar 9 is preferably between 2 and 5 mm.

Claims (7)

Spinnrotor (3) für eine insbesondere mit hohen Rotordrehzahlen arbeitende Offenend-Spinnvorrichtung (1), mit einer Rotortasse (26), die einen Rotorboden (6) sowie eine Öffnung (30) aufweist und über einen als Faserrutschwand ausgebildeten, ringförmigen Wandabschnitt (31) verfügt,
dadurch gekennzeichnet,
dass die Rotortasse (26) im Übergangsbereich zwischen dem Rotorboden (6) und dem ringförmigen Wandabschnitt (31) einen von der Öffnung (30) der Rotortasse (26) weg weisenden Stützkragen (9) aufweist.Spinning rotor (3) for an open-end spinning device (1) operating in particular at high rotor speeds, having a rotor cup (26) which has a rotor bottom (6) and an opening (30) and has an annular wall section (31) formed as a fiber sliding wall features,
characterized,
that has the rotor cup (26) facing away in the transition region between the rotor base (6) and the annular wall portion (31) one of the opening (30) of the rotor cup (26) supporting the collar (9). Spinnrotor nach Anspruch 1, dadurch gekennzeichnet, dass der Stützkragen (9) als rotationssymmetrischer Ring ausgebildet ist.Spinning rotor according to claim 1, characterized in that the support collar (9) is designed as a rotationally symmetrical ring. Spinnrotor nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Stützkragen (9) eine im Wesentlichen dreiecksförmige Querschnittsfläche (Q) aufweist.Spinning rotor according to claim 1 or 2, characterized in that the support collar (9) has a substantially triangular cross-sectional area (Q). Spinnrotor nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der Stützkragen (9) einstückig an die Rückseite (39) des Rotorbodens (6) angeformt ist.Spinning rotor according to one of the preceding claims, characterized in that the supporting collar (9) is integrally formed on the rear side (39) of the rotor base (6). Spinnrotor nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der Stützkragen (9) eine Tiefe (TSK) aufweist, die weniger als ein Drittel der Länge (L) des Wandabschnittes (31) der Rotortasse (26) beträgt.Spinning rotor according to one of the preceding claims, characterized in that the supporting collar (9) has a depth (T SK) which is less than one third of the length (L) of the wall section (31) of the rotor cup (26). Spinnrotor nach Anspruch 5, dadurch gekennzeichnet, dass die Tiefe (TSK) des Stützkragens (9) zwischen 2 und 5 mm beträgt.Spinning rotor according to claim 5, characterized in that the depth (T SK) of the support collar (9) is between 2 and 5 mm. Spinnrotor nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der Wandabschnitt eine Wandstärke von weniger als 1,5 mm aufweist.Spinning rotor according to one of the preceding claims, characterized in that the wall portion has a wall thickness of less than 1.5 mm.
EP16001025.2A 2015-06-18 2016-05-06 Spinning rotor for an open-end spinning device working with high rotor speeds Active EP3106550B1 (en)

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DE102015007819.4A DE102015007819A1 (en) 2015-06-18 2015-06-18 Spinning rotor for an open-end spinning device operating at high rotor speeds

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EP (1) EP3106550B1 (en)
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DE102017113029A1 (en) * 2017-06-13 2018-12-13 Maschinenfabrik Rieter Ag Method for producing a rotor cup for an open-end spinning rotor and rotor cup for an open-end spinning rotor
DE102018112594A1 (en) * 2018-05-25 2019-11-28 Maschinenfabrik Rieter Ag Process for preparing a yarn for piecing on a rotor spinning device of a rotor spinning machine and rotor spinning machine
CN109554785A (en) * 2019-01-21 2019-04-02 杭州三相科技有限公司 A kind of direct-drive type revolving cup and the revolving cup cluster control system with the direct-drive type revolving cup

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EP3106550B1 (en) 2019-07-10
CN106256934A (en) 2016-12-28
US10023980B2 (en) 2018-07-17
DE102015007819A1 (en) 2016-12-22
MX2016007937A (en) 2016-12-19
CN106256934B (en) 2019-02-19
US20160369429A1 (en) 2016-12-22
BR102016012392A2 (en) 2016-12-27

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