EP1882058B1 - Spinning rotor - Google Patents

Spinning rotor Download PDF

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Publication number
EP1882058B1
EP1882058B1 EP06724234A EP06724234A EP1882058B1 EP 1882058 B1 EP1882058 B1 EP 1882058B1 EP 06724234 A EP06724234 A EP 06724234A EP 06724234 A EP06724234 A EP 06724234A EP 1882058 B1 EP1882058 B1 EP 1882058B1
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EP
European Patent Office
Prior art keywords
rotor
spinning
rotor shaft
cup
shaft
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
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EP06724234A
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German (de)
French (fr)
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EP1882058A1 (en
Inventor
Heinz-Georg Wassenhoven
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Oerlikon Textile GmbH and Co KG
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Oerlikon Textile GmbH and Co KG
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Publication of EP1882058A1 publication Critical patent/EP1882058A1/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
    • D01H4/10—Rotors

Definitions

  • the invention relates to a spinning rotor for an open-end rotor spinning machine according to the preamble of claim 1.
  • spinning rotors are described in which the rotor discs are each connected to the rotor shaft via a hub into which a bore is embedded.
  • the connection is designed as a press fit and insoluble.
  • spinning rotors are known in which the rotor discs in the region of the rotor base only have a central bore in which the rotor shaft is inserted.
  • the rotor shaft is equipped with a system collar on which the rotor plate is fixed by a welded joint.
  • a welded joint for fixing a rotor cup on the rotor shaft is also in the DE 35 19 536 A1 described.
  • the rotor dish on an extra thick floor. At this Rotorteller convinced the rotor shaft is fixed by means of friction welding.
  • connection is relatively heavy, which has a very adverse effect on the acceleration capacity of the spinning rotor or that in the course of the connection of the two rotor parts to a structural change in the components, which due to the high speeds of such spinning rotors is not a problem.
  • the present invention seeks to provide a spinning rotor for an open-end rotor spinning machine, which does not have the disadvantages of the known spinning rotors. That is, it is to be developed a spinning rotor, which has both a secure connection between rotor cup and rotor shaft, as well as a relatively low moment of inertia.
  • the rotor shaft and the rotor plate have connection means which are at least partially surrounded by a connecting element designed as a casting, whereby a positive connection of the rotor shaft with the rotor plate can be achieved.
  • a shaft-hub connection is created at the junction between the rotor shaft and rotor plate, with a significant mass saving of the spinning rotor can be achieved, wherein the rotor shaft and the rotor plate are rotatably connected substantially by the positive connection. Due to the above-described training, the moment of inertia of the spinning rotor can be significantly reduced, which in particular affects the acceleration behavior of the spinning rotor.
  • the formed as a casting connecting element also improves the mass distribution of the spinning rotor and thus its behavior at high speeds, without weakening the rotor cup in the hub area inadmissible.
  • connection element executed as a casting connection element can also enter into a cohesive connection to the contact surfaces on the rotor plate and the rotor shaft.
  • connection at the contact surfaces is irrelevant in connection with the present invention.
  • the rotor shaft in an advantageous embodiment has a connection means designed as a profiling.
  • the profiling arranged on the rotor shaft at the end extends in part through a hole in the rotor bottom of the rotor cup into the interior of the rotor cup (3) and may have different shapes.
  • the profiling for example, as set forth in claim 4, be designed as an annular groove, as a helical groove or as knurling and serves mainly to ensure that the connecting element can form a positive connection with the rotor shaft.
  • the annular groove has, for example, a recess into which the liquid potting compound can completely penetrate.
  • the profiling expediently extends from the free end of the rotor shaft, which projects into the interior of the rotor cup, through the bore of the rotor base into the rotor cup.
  • the connecting element is fixed in a form-fitting manner both inside and outside of the rotor cup on the circumferential side of the rotor shaft.
  • This purpose is also served by the connection means arranged in the rotor bottom of the rotor cup (FIG. 5).
  • the connecting element which is formed in one piece, extends from the outside of the rotor cup through the openings on the rotor bottom into the interior of the rotor cup and thus contributes substantially to a good fit. That is, the one-piece die-cast connection element (claim 6) provides a reliable connection of the rotor shaft and the rotor cup.
  • the die cast part advantageously consists of a metal, in particular of Al, Zn, Mg, Ag, Cu, Au, Si, Fe, Ti, Ge, Sn or the like or is formed from an alloy of these metals.
  • the connecting element designed as a casting is produced in such a way that first the rotor plate is guided into a corresponding device, for example into an insertion tool, of a die-casting machine and fixed accordingly there. Subsequently, the rotor shaft is guided into the bore of the rotor cup and also fixed there by means of a corresponding device.
  • the connection area which represents the connecting element after the die casting process, is subsequently covered correspondingly by a casting mold, which forms an outer shell for the Potting compound forms.
  • the material of the potting compound is zinc, for example.
  • the liquid potting compound is conveyed into the mold with a corresponding pressure, which can be, for example, 400-600 bar. After the casting material has cooled, it forms a reliable, permanent connection between the rotor shaft and the rotor cup.
  • the spinning rotor of the rotor shaft and the bore in the rotor bottom are formed such that the rotor shaft is inserted with a clearance in the bore before the die-casting process is started (Anspr. 9).
  • the game serves to align the rotor shaft reliably in the bore through the centering tool.
  • the game is expediently less than 3 mm, preferably less than 1 mm executed. In the cooled state of the casting compound, the game is filled by the connecting element.
  • the wall thickness of the rotor cup in particular the wall thickness of the sliding wall
  • the sliding wall has a wall thickness d which is in the range of 0.5 mm ⁇ d ⁇ 1.5 mm, preferably in the range of 0.6 mm ⁇ d ⁇ 0.8 mm.
  • FIG. 1 is a spinning rotor 1 of a known per se and therefore not explicitly shown open-end rotor spinning machine.
  • open-end rotor spinning machines each have a gar horrbeetzbares rotor housing in which the rotor cup 3 of the spinning rotor 1 rotates at high speed about its central axis 13.
  • the spinning rotor 1 is driven for example by an electric motor single drive.
  • the spinning rotor 1 is supported in this case with its rotor shaft, in a magnetic bearing assembly, not shown, which fixes the spinning rotor 1 both radially and axially.
  • the rotor shafts of such spinning rotors have, as shown in the embodiment, a bearing with components provided (not shown) rotor shaft portion remaining in the magnetic bearing, and a rotor shaft portion on which the rotor cup 3 is fixed and which are removed with the rotor cup 3 can.
  • This rotor shaft section connected to the rotor cup 3 is referred to in the present application for the sake of simplicity as a rotor shaft and is identified by reference numeral 2.
  • the rotor cup 3 which may be turned, for example, from solid, has an opening 4, an interior space 5, a rotor groove 6, a from the opening 4 to the rotor groove 6 extending, conically widening sliding wall 7 and one of the opening 4 arranged opposite, with a bore 8 running rotor bottom 9.
  • the rotor shaft 2 extends. That is, the rotor shaft 2 protrudes into the inner space 5 of the rotor cup 3, which in addition to a sliding surface 7, which has the rotor groove 6 serving as a fiber collecting groove.
  • the rotor cup 3 may also be formed as a casting or be brought from a non-cutting shaped part by machining in the desired shape.
  • the wall thickness of the rotor cup 3 between the opening 4 and the bore 8 is substantially the same size.
  • the wall thickness of the rotor cup 3, starting from the opening 4 in the direction of the rotor bottom 9 vary.
  • the rotor shaft 2 is connected to the rotor cup 3 by means of a one-piece connecting element 10.
  • the connecting element 10 is formed from a potting compound whose material in the present embodiment, for example, zinc.
  • the zinc die casting causes a substantially positive connection of the rotor shaft 2 with the rotor cup 3, wherein the connecting element 10 is disposed both outside and inside the rotor cup 3.
  • the rotor shaft 2 and the rotor cup 3 have corresponding connection means 11, 12, which pass through the casting trained connecting element 10 are at least partially surrounded or covered.
  • the rotor shaft 2 has, for example, a profile 12 at the end, which extends in the installed state into the interior 5 of the rotor cup 3.
  • the potting compound 10 penetrates during the die casting process into the grooves of the profiling 12, so that the connecting element 10 has a reliable hold on the rotor shaft 2 in the cooled state.
  • the rotor cup 3 on the rotor bottom 9 on connecting means which are designed as openings 11, as shown in FIG. 2 is shown.
  • the rotor bottom 9 has, for example, six openings 11, which are arranged in a circle around the axis of rotation 13 around.
  • a larger or smaller number of openings 11 can be used as connection means for the connecting element 10.
  • opposing openings 11 are arranged diametrically to each other, so that unbalance problems can be largely eliminated.
  • the circular openings 11 may of course have alternative geometric shapes, such as square, rectangular or the like.
  • the connecting element 10 extends from the rotor shaft 2 outside the rotor cup 3 through the openings 11 into the interior 5 of the rotor cup 3.
  • the one-piece connecting element 10 has a positive connection to the profiling 12 of the rotor shaft 2 and to the Openings 11, whereby a secure, rotationally fixed connection between the rotor cup 3 and rotor shaft 2 is ensured.
  • the mass moment of inertia of the spinning rotor 1 can be significantly reduced compared to the hitherto conventional compounds by the formed as a casting connecting element 10, which has a favorable effect on the performance of the spinning rotor.
  • Fig. 1 takes the wall thickness of the connecting element 10 in the direction of the interior 5 (outside the rotor cup 3) initially steadily increased and reached in the nearer region of the rotor bottom 9, the largest wall thickness. In the interior 5, the wall thickness then decreases slightly.
  • the present outer contour is determined by the casting mold.
  • the diameter of the rotor shaft 2 is less than the diameter of the central bore eighth That is, between the rotor shaft 2 and the bore 8 game is given, which is approximately 1 mm in the illustrated embodiment.
  • the rotor shaft 2 is provided with an external hexagon 14, which in conjunction with a corresponding hexagon socket, not shown on a rotor shaft portion which remains in the magnetic bearing, forms a positive rotation.
  • the rotor cup 3 is in the present embodiment, as is known, made of a steel and is borated. Furthermore, as is also known, the rotor cup 3 additionally has a diamond dispersion coating.
  • the rotor shaft 2 is also made of a steel, which in the present embodiment is a chrome steel.
  • the connecting element 10 represents a three-dimensionally designed connecting element 10, which rests against the openings 11, on the bore 8, on the rotor shaft 2, on the profiling 12, and on the contact surfaces of the rotor shaft 2 with the bottom 9 and thus a high strength and rotational security has, without negatively impact on the moment of inertia of the spinning rotor 1.

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

Abstract

A spinning rotor (1) for an open-end rotor spinning machine has a rotor shaft (2), a rotor disk (3) with an opening (4), an inner chamber (5), a rotor groove (6), a conically tapering slide wall (7) which extends from the opening (4) to the rotor groove (6), and a rotor base (9) facing the opening (4) and provided with a bore (8) through which the rotor shaft (2) extends at least partially. The rotor shaft (2) is linked to the rotor disk (3) by a connection element (10), and the rotor shaft (2) and rotor disk (3) comprise a common rotational axis (13). According to the invention, the rotor shaft (2) and the rotor disk (3) include connection means (11, 12) that are at least partially surrounded by the connection element (10) designed as a cast part, thus achieving an interlocking connection between the rotor shaft (2) and the rotor disk (3).

Description

Die Erfindung betrifft einen Spinnrotor für eine Offenend-Rotorspinnmaschine gemäß dem Oberbegriff des Anspruches 1.The invention relates to a spinning rotor for an open-end rotor spinning machine according to the preamble of claim 1.

Aus der Patentliteratur sind im Zusammenhang mit Offenend-Rotorspinnmaschinen eine Vielzahl verschiedenster Spinnrotoren bekannt, die in der Regel aus einem Rotorschaft zum Lagern des Spinnrotors und einem Rotorteller zur Herstellung eines Fadens bestehen. Solche Spinnrotoren erreichen in modernen Offenend-Spinnmaschinen Drehzahlen von weit über 100.000 min-1. Derartig hohe Drehzahlen stellen insgesamt besondere Anforderungen im Hinblick auf Unwucht, Lagerung und Stabilität derartiger Spinnrotoren.
Da derartige Spinnrotoren, zum Beispiel in Folge mechanischer Schwingungen, stark beansprucht werden, sind höchste Anforderungen auch auf die Befestigung zwischen Rotorschaft und Rotorteller gestellt.From the patent literature, in connection with open-end rotor spinning machines, a multiplicity of very different spinning rotors are known, which as a rule consist of a rotor shaft for supporting the spinning rotor and a rotor plate for producing a thread. Such spinning rotors reach speeds of well over 100,000 min -1 in modern open-end spinning machines. Such high speeds make overall special demands with regard to imbalance, storage and stability of such spinning rotors.
Since such spinning rotors, for example, as a result of mechanical vibrations, are highly stressed, the highest demands are placed on the attachment between the rotor shaft and rotor plate.

In der DE-OS 28 12 297 oder der DE 199 10 77 A1 sind beispielsweise Spinnrotoren beschrieben, bei denen die Rotorteller jeweils über eine Nabe, in die eine Bohrung eingelassen ist, mit dem Rotorschaft verbunden sind. Die Verbindung ist dabei als Presssitz ausgeführt und unlösbar.In the DE-OS 28 12 297 or the DE 199 10 77 A1 For example, spinning rotors are described in which the rotor discs are each connected to the rotor shaft via a hub into which a bore is embedded. The connection is designed as a press fit and insoluble.

Durch die DE 40 20 518 A1 oder die DE 103 02 178 A1 sind des Weiteren Spinnrotoren bekannt, bei denen die Rotorteller im Bereich des Rotorbodens lediglich einer zentrischen Bohrung aufweisen, in der der Rotorschaft steckt.
Der Rotorschaft ist dabei mit einem Anlagebund ausgestattet, an dem der Rotorteller durch eine Schweißverbindung festgelegt ist.
Eine Schweißverbindung zum Festlegen eines Rotortellers am Rotorschaft ist auch in der DE 35 19 536 A1 beschrieben. Bei dieser bekannten Einrichtung weist der Rotorteller einen extra dicken Boden auf. An diesem Rotortellerboden ist mittels Reibschweißen der Rotorschaft festgelegt.By the DE 40 20 518 A1 or the DE 103 02 178 A1 Furthermore, spinning rotors are known in which the rotor discs in the region of the rotor base only have a central bore in which the rotor shaft is inserted.
The rotor shaft is equipped with a system collar on which the rotor plate is fixed by a welded joint.
A welded joint for fixing a rotor cup on the rotor shaft is also in the DE 35 19 536 A1 described. In this known device, the rotor dish on an extra thick floor. At this Rotortellerboden the rotor shaft is fixed by means of friction welding.

Die vorgenannten Verbindungen zwischen Rotorteller und Rotorschaft weisen insgesamt den Nachteil auf, dass entweder die Verbindung relativ schwer ausfällt, was sich sehr nachteilig auf das Beschleunigungsvermögen des Spinnrotors auswirkt oder dass es im Zuge der Anbindung der beiden Rotorteile zu einer Gefügeänderung in den Bauteilen kommt, was aufgrund der hohen Drehzahlen solcher Spinnrotoren nicht unproblematisch ist.The aforementioned connections between rotor cup and rotor shaft have the disadvantage that either the connection is relatively heavy, which has a very adverse effect on the acceleration capacity of the spinning rotor or that in the course of the connection of the two rotor parts to a structural change in the components, which due to the high speeds of such spinning rotors is not a problem.

Ausgehend vom vorgenannten Stand der Technik liegt der Erfindung die Aufgabe zugrunde, einen Spinnrotor für eine Offenend-Rotorspinnmaschine zu schaffen, der die Nachteile der bekannten Spinnrotoren nicht aufweist.
Das heißt, es soll ein Spinnrotor entwickelt werden, der sowohl über eine sichere Verbindung zwischen Rotortasse und Rotorschaft verfügt, als auch ein relativ geringes Massenträgheitsmoment aufweist.Based on the aforementioned prior art, the present invention seeks to provide a spinning rotor for an open-end rotor spinning machine, which does not have the disadvantages of the known spinning rotors.
That is, it is to be developed a spinning rotor, which has both a secure connection between rotor cup and rotor shaft, as well as a relatively low moment of inertia.

Zur Lösung dieser Aufgabe wird ein Spinnrotor mit den Merkmalen des Anspruches 1 vorgeschlagen.To solve this problem, a spinning rotor with the features of claim 1 is proposed.

In den abhängigen Ansprüchen sind bevorzugte Weiterbildungen ausgeführt.In the dependent claims preferred developments are carried out.

Erfindungsgemäß ist vorgesehen, dass der Rotorschaft und der Rotorteller Anschlussmittel aufweisen, die durch ein als Gussteil ausgebildete Verbindungselement zumindest teilweise umgeben sind, wodurch eine formschlüssige Verbindung des Rotorschaftes mit dem Rotorteller erzielbar ist.
Durch eine derartige Ausführungsform des Spinnrotors wird an der Verbindungsstelle zwischen Rotorschaft und Rotorteller eine Wellen-Nabenverbindung geschaffen, mit der eine erhebliche Masseneinsparung des Spinnrotors erzielt werden kann, wobei der Rotorschaft und der Rotorteller im wesentlichen durch die formschlüssige Verbindung drehfest verbunden sind.
Durch die vorbeschriebene Ausbildung kann das Massenträgheitsmoment des Spinnrotors deutlich gesenkt werden, was sich insbesondere auf das Beschleunigungsverhalten des Spinnrotors auswirkt.
Das als Gussteil ausgebildete Verbindungselement verbessert außerdem die Massenverteilung des Spinnrotors und damit dessen Laufverhalten bei hohen Drehzahlen, ohne den Rotorteller im Nabenbereich unzulässig zu schwächen.According to the invention it is provided that the rotor shaft and the rotor plate have connection means which are at least partially surrounded by a connecting element designed as a casting, whereby a positive connection of the rotor shaft with the rotor plate can be achieved.
By such an embodiment of the spinning rotor, a shaft-hub connection is created at the junction between the rotor shaft and rotor plate, with a significant mass saving of the spinning rotor can be achieved, wherein the rotor shaft and the rotor plate are rotatably connected substantially by the positive connection.
Due to the above-described training, the moment of inertia of the spinning rotor can be significantly reduced, which in particular affects the acceleration behavior of the spinning rotor.
The formed as a casting connecting element also improves the mass distribution of the spinning rotor and thus its behavior at high speeds, without weakening the rotor cup in the hub area inadmissible.

Das vorstehend beschriebene, als Gussteil ausgeführte Verbindungselement kann selbstverständlich zusätzlich auch eine stoffschlüssige Verbindung an den Kontaktflächen am Rotorteller sowie am Rotorschaft eingehen.
Die Art der Verbindung an den Kontaktflächen ist im Zusammenhang mit der vorliegenden Erfindung allerdings ohne Bedeutung.Of course, the above-described, executed as a casting connection element can also enter into a cohesive connection to the contact surfaces on the rotor plate and the rotor shaft.
However, the nature of the connection at the contact surfaces is irrelevant in connection with the present invention.

Wie in den Ansprüchen 2 - 4 dargelegt, weist der Rotorschaft in einer vorteilhaften Ausführungsform ein als Profilierung ausgebildetes Anschlussmittel auf.
Die endseitig am Rotorschaft angeordnete Profilierung reicht dabei durch eine Bohrung im Rotorboden des Rotortellers teilweise in den Innenraum des Rotortellers (3) hinein und kann unterschiedliche Formen aufweisen.
Die Profilierung kann beispielsweise, wie im Anspruch 4 dargelegt, als ringförmige Nut, als schraubenförmige Nut oder als Rändelung ausgeführt sein und dient vor allem dazu, dass das Verbindungselement mit dem Rotorschaft einen Formschluss eingehen kann.
Die ringförmige Nut weist beispielsweise eine Vertiefung auf, in die die flüssige Vergussmasse vollständig eindringen kann. Wie vorstehend angedeutet, erstreckt sich die Profilierung zweckmäßigerweise vom freien Ende des Rotorschaftes, der in den Innenraum des Rotortellers hineinragt, durch die Bohrung des Rotorbodens bis in den Rotorteller.
Durch eine derartige Ausgestaltung wird das Verbindungselement sowohl innerhalb als auch außerhalb des Rotortellers umfangsseitig des Rotorschaftes formschlüssig fixiert.
Diesem Zweck dienen auch die im Rotorboden des Rotortellers angeordneten, als Öffnungen ausgebildeten Anschlussmittel (Anspr. 5) .
Das Verbindungselement, das einstückig ausgebildet ist, erstreckt sich von der Außenseite des Rotortellers durch die Öffnungen am Rotorboden in den Innenraum des Rotortellers und trägt damit einen wesentlichen Beitrag für einen guten Formschluss bei.
Das heißt, das als einstückiges Druckgussteil ausgebildete Verbindungselement (Anspr. 6) sorgt für eine zuverlässige Verbindung von Rotorschaft und Rotortasse.As set out in claims 2 to 4, the rotor shaft in an advantageous embodiment has a connection means designed as a profiling.
The profiling arranged on the rotor shaft at the end extends in part through a hole in the rotor bottom of the rotor cup into the interior of the rotor cup (3) and may have different shapes.
The profiling, for example, as set forth in claim 4, be designed as an annular groove, as a helical groove or as knurling and serves mainly to ensure that the connecting element can form a positive connection with the rotor shaft.
The annular groove has, for example, a recess into which the liquid potting compound can completely penetrate. As indicated above, the profiling expediently extends from the free end of the rotor shaft, which projects into the interior of the rotor cup, through the bore of the rotor base into the rotor cup.
By such a configuration, the connecting element is fixed in a form-fitting manner both inside and outside of the rotor cup on the circumferential side of the rotor shaft.
This purpose is also served by the connection means arranged in the rotor bottom of the rotor cup (FIG. 5).
The connecting element, which is formed in one piece, extends from the outside of the rotor cup through the openings on the rotor bottom into the interior of the rotor cup and thus contributes substantially to a good fit.
That is, the one-piece die-cast connection element (claim 6) provides a reliable connection of the rotor shaft and the rotor cup.

Wie im Anspruch 7 beschrieben, besteht das Druckgussteil dabei vorteilhafterweise aus einem Metall, insbesondere aus Al, Zn, Mg, Ag, Cu, Au, Si, Fe, Ti, Ge, Sn oder dergleichen beziehungsweise ist aus einer Legierung aus diesen Metallen gebildet.As described in claim 7, the die cast part advantageously consists of a metal, in particular of Al, Zn, Mg, Ag, Cu, Au, Si, Fe, Ti, Ge, Sn or the like or is formed from an alloy of these metals.

Wie im Anspruch 8 angedeutet, wird das als Gussteil ausgebildete Verbindungselement derart hergestellt, dass zunächst der Rotorteller in eine entsprechende Vorrichtung, beispielsweise in ein Einlegewerkzeug, einer Druckgussmaschine geführt und dort entsprechend fixiert wird. Anschließend wird der Rotorschaft in die Bohrung des Rotortellers geführt und dort ebenfalls mittels einer entsprechenden Vorrichtung fixiert.
Der Verbindungsbereich, der nach dem Druckgussverfahren das Verbindungselement darstellt, wird im Anschluss durch eine Gussform entsprechend abgedeckt, die eine Außenschale für die Vergussmasse bildet. In einer möglichen Ausführungsform ist der Werkstoff der Vergussmasse beispielsweise Zink.
Die flüssige Vergussmasse wird mit einem entsprechenden Druck, der beispielsweise 400-600 bar betragen kann, in die Gussform gefördert. Nachdem die Gussmasse erkaltet ist, bildet diese eine zuverlässige, unlösbare Verbindung zwischen Rotorschaft und Rotorteller.As indicated in claim 8, the connecting element designed as a casting is produced in such a way that first the rotor plate is guided into a corresponding device, for example into an insertion tool, of a die-casting machine and fixed accordingly there. Subsequently, the rotor shaft is guided into the bore of the rotor cup and also fixed there by means of a corresponding device.
The connection area, which represents the connecting element after the die casting process, is subsequently covered correspondingly by a casting mold, which forms an outer shell for the Potting compound forms. In one possible embodiment, the material of the potting compound is zinc, for example.
The liquid potting compound is conveyed into the mold with a corresponding pressure, which can be, for example, 400-600 bar. After the casting material has cooled, it forms a reliable, permanent connection between the rotor shaft and the rotor cup.

In einer weiteren vorteilhaften Ausgestaltung des Spinnrotors sind der Rotorschaft und die Bohrung im Rotorboden derart ausgebildet, dass der Rotorschaft mit einem Spiel in der Bohrung eingesetzt ist, bevor das Druckgussverfahren gestartet wird (Anspr. 9).
Das Spiel dient unter anderem dazu, den Rotorschaft zuverlässig in der Bohrung durch das Zentrierwerkzeug auszurichten. Das Spiel ist zweckmäßigerweise geringer als 3 mm, vorzugsweise geringer als 1 mm ausgeführt.
Im erkalteten Zustand der Vergussmasse ist das Spiel durch das Verbindungselement ausgefüllt.In a further advantageous embodiment of the spinning rotor of the rotor shaft and the bore in the rotor bottom are formed such that the rotor shaft is inserted with a clearance in the bore before the die-casting process is started (Anspr. 9).
Among other things, the game serves to align the rotor shaft reliably in the bore through the centering tool. The game is expediently less than 3 mm, preferably less than 1 mm executed.
In the cooled state of the casting compound, the game is filled by the connecting element.

Ferner ist es denkbar, die Rotorhochlaufzeit bis zum Erreichen der gewünschten Betriebsdrehzahl des Spinnrotors dadurch weiter zu senken, dass die Wandstärke des Rotortellers, insbesondere die Wandstärke der Rutschwand, entsprechend reduziert wird.
Zweckmäßigerweise weist die Rutschwand eine Wandstärke d auf, die im Bereich von 0.5 mm ≤ d ≤ 1.5 mm liegt, vorzugsweise im Bereich von 0.6 mm ≤ d ≤ 0.8 mm liegt.
Durch derartige verbessernde Maßnahmen kann außerdem der Energieverbrauch pro Spinnstelle erheblich vermindert werden.
Dieses führt bei den üblicherweise als Vielstellen-Textilmaschine ausgeführten Offenend-Rotorspinnmaschinen zu einer erheblichen Kosteneinsparung pro Maschine.
Ferner bewirken die genannten erfindungsgemäßen Merkmale ein verbessertes Betriebsverhalten des Spinnrotors, des Antriebselementes und der Lagerung und somit eine höhere Betriebssicherheit mit einem gleichzeitigen größeren Nutzungsgrad, welches mit einer Steigerung der Produktivität verbunden ist.Furthermore, it is conceivable to further reduce the rotor ramp-up time until the desired operating rotational speed of the spinning rotor has been reached, in that the wall thickness of the rotor cup, in particular the wall thickness of the sliding wall, is correspondingly reduced.
Conveniently, the sliding wall has a wall thickness d which is in the range of 0.5 mm ≦ d ≦ 1.5 mm, preferably in the range of 0.6 mm ≦ d ≦ 0.8 mm.
By means of such improvement measures, moreover, the energy consumption per spinning station can be considerably reduced.
In the case of the open-end rotor spinning machines, which are usually designed as multi-point textile machines, this leads to considerable cost savings per machine.
Furthermore, the mentioned features according to the invention cause an improved operating behavior of the spinning rotor, the drive element and the storage and thus a higher reliability with a simultaneously greater efficiency, which is associated with an increase in productivity.

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:

Figur 1
eine Schnittdarstellung des erfindungsgemäßen Spinnrotors,
Figur 2
eine Seitenansicht des Spinnrotors gemäß Figur 1.
Show it:
FIG. 1
a sectional view of the spinning rotor according to the invention,
FIG. 2
a side view of the spinning rotor according to FIG. 1 ,

In Figur 1 ist ein Spinnrotor 1 einer an sich bekannten und daher nicht explizit gezeigten Offenend-Rotorspinnmaschine dargestellt.
Wie beispielsweise in der EP 0 972 868 A2 relativ ausführlich beschrieben, weisen solche Offenend-Rotorspinnmaschinen jeweils ein unterdruckbeaufschlagbares Rotorgehäuse auf, in dem der Rotorteller 3 des Spinnrotors 1 mit hoher Drehzahl um seine Mittelachse 13 rotiert.In FIG. 1 is a spinning rotor 1 of a known per se and therefore not explicitly shown open-end rotor spinning machine.
Such as in the EP 0 972 868 A2 described in relative detail, such open-end rotor spinning machines each have a unterdruckbeaufschlagbares rotor housing in which the rotor cup 3 of the spinning rotor 1 rotates at high speed about its central axis 13.

Der Spinnrotor 1 wird dabei beispielsweise durch einen elektromotorischen Einzelantrieb angetrieben.
Der Spinnrotor 1 ist in diesem Fall mit seinem Rotorschaft, in einer nicht dargestellten magnetischen Lageranordnung abgestützt, die den Spinnrotor 1 sowohl radial als auch axial fixiert.The spinning rotor 1 is driven for example by an electric motor single drive.
The spinning rotor 1 is supported in this case with its rotor shaft, in a magnetic bearing assembly, not shown, which fixes the spinning rotor 1 both radially and axially.

Um solche Spinnrotoren 1, insbesondere die einem Verschleiß unterworfenen Rotorteller 3 bei Bedarf ausbauen zu können, ist es bekannt, die Rotorschäfte solcher Spinnrotoren zweiteilig auszubilden.
Das heißt, die Rotorschäfte solcher Spinnrotoren weisen, wie im Ausführungsbeispiel dargestellt, einen mit Lagerkomponenten versehenen (nicht dargestellten) Rotorschaftabschnitt auf, der in der Magnetlagerung verbleibt, und einen Rotorschaftabschnitt, an dem der Rotorteller 3 festgelegt ist und der mit dem Rotorteller 3 ausgebaut werden kann.
Dieser mit dem Rotorteller 3 verbundene Rotorschaftabschnitt ist in der vorliegenden Anmeldung der Einfachheit halber als Rotorschaft bezeichnet und mit der Bezugszahl 2 gekennzeichnet.
Der Rotorteller 3, der beispielsweise aus dem Vollen gedreht sein kann, weist eine Öffnung 4, einen Innenraum 5, eine Rotorrille 6, eine von der Öffnung 4 zur Rotorrille 6 sich erstreckende, konisch aufweitende Rutschwand 7 und einen der Öffnung 4 gegenüberliegend angeordneten, mit einer Bohrung 8 ausgeführten Rotorboden 9 auf.In order to be able to expand such spinning rotors 1, in particular the rotor plate 3 subject to wear, if necessary, it is known to design the rotor shafts of such spinning rotors in two parts.
That is, the rotor shafts of such spinning rotors have, as shown in the embodiment, a bearing with components provided (not shown) rotor shaft portion remaining in the magnetic bearing, and a rotor shaft portion on which the rotor cup 3 is fixed and which are removed with the rotor cup 3 can.
This rotor shaft section connected to the rotor cup 3 is referred to in the present application for the sake of simplicity as a rotor shaft and is identified by reference numeral 2.
The rotor cup 3, which may be turned, for example, from solid, has an opening 4, an interior space 5, a rotor groove 6, a from the opening 4 to the rotor groove 6 extending, conically widening sliding wall 7 and one of the opening 4 arranged opposite, with a bore 8 running rotor bottom 9.

Durch die Öffnung 8 des Rotorbodens 9 erstreckt sich der Rotorschaft 2.
Das heißt, der Rotorschaft 2 ragt in den Innenraum 5 des Rotortellers 3 hinein, der neben einer Rutschfläche 7, die als Fasersammelrille dienende Rotorrille 6 aufweist.Through the opening 8 of the rotor bottom 9, the rotor shaft 2 extends.
That is, the rotor shaft 2 protrudes into the inner space 5 of the rotor cup 3, which in addition to a sliding surface 7, which has the rotor groove 6 serving as a fiber collecting groove.

In alternativer Ausführungsform kann der Rotorteller 3 auch als Gussteil ausgebildet sein oder aus einem spanlos geformten Teil durch spanabhebende Bearbeitung in die gewünschte Form gebracht werden.
Die Wandstärke des Rotortellers 3 zwischen der Öffnung 4 und der Bohrung 8 ist im Wesentlichen gleich groß ausgebildet. Selbstverständlich kann in einer weiteren nicht dargestellten Ausführungsform die Wandstärke des Rotortellers 3 ausgehend von der Öffnung 4 in Richtung des Rotorbodens 9 variieren.In an alternative embodiment, the rotor cup 3 may also be formed as a casting or be brought from a non-cutting shaped part by machining in the desired shape.
The wall thickness of the rotor cup 3 between the opening 4 and the bore 8 is substantially the same size. Of course, in a further embodiment not shown, the wall thickness of the rotor cup 3, starting from the opening 4 in the direction of the rotor bottom 9 vary.

Der Rotorschaft 2 ist mittels eines einstückigen Verbindungselementes 10 mit dem Rotorteller 3 verbunden.
Das Verbindungselement 10 ist aus einer Vergussmasse gebildet, deren Werkstoff im vorliegenden Ausführungsbeispiel beispielsweise Zink ist.
Das Zinkdruckgussteil bewirkt eine im wesentlichen formschlüssige Verbindung des Rotorschaftes 2 mit dem Rotorteller 3, wobei das Verbindungselement 10 sowohl außerhalb als auch innerhalb des Rotortellers 3 angeordnet ist.
Um eine besonders hohe Drehfestigkeit der Verbindung zwischen Rotorschaft 2 und Rotorteller 3 zu erzielen, weisen der Rotorschaft 2 und der Rotorteller 3 entsprechende Anschlussmittel 11, 12 auf, die durch das als Gussteil ausgebildete Verbindungselement 10 zumindest teilweise umgeben beziehungsweise bedeckt sind.
Der Rotorschaft 2 weist endseitig beispielsweise eine Profilierung 12 auf, die sich im Einbauzustand bis in den Innenraum 5 des Rotortellers 3 erstreckt.
Die Vergussmasse 10 dringt während des Druckgussverfahrens in die Nuten der Profilierung 12 ein, so dass das Verbindungselement 10 im erkalteten Zustand einen zuverlässigen Halt am Rotorschaft 2 aufweist.The rotor shaft 2 is connected to the rotor cup 3 by means of a one-piece connecting element 10.
The connecting element 10 is formed from a potting compound whose material in the present embodiment, for example, zinc.
The zinc die casting causes a substantially positive connection of the rotor shaft 2 with the rotor cup 3, wherein the connecting element 10 is disposed both outside and inside the rotor cup 3.
In order to achieve a particularly high torsional strength of the connection between the rotor shaft 2 and the rotor cup 3, the rotor shaft 2 and the rotor cup 3 have corresponding connection means 11, 12, which pass through the casting trained connecting element 10 are at least partially surrounded or covered.
The rotor shaft 2 has, for example, a profile 12 at the end, which extends in the installed state into the interior 5 of the rotor cup 3.
The potting compound 10 penetrates during the die casting process into the grooves of the profiling 12, so that the connecting element 10 has a reliable hold on the rotor shaft 2 in the cooled state.

Ferner weist der Rotorteller 3 am Rotorboden 9 Anschlussmittel auf, die als Öffnungen 11 ausgeführt sind, wie dies in Figur 2 dargestellt ist.
Der Rotorboden 9 weist beispielsweise sechs Öffnungen 11 auf, die kreisförmig um die Drehachse 13 herum angeordnet sind. Selbstverständlich können auch eine größere oder geringere Anzahl an Öffnungen 11 als Anschlussmittel für das Verbindungselement 10 eingesetzt werden.
Vorzugsweise sind dabei gegenüberliegende Öffnungen 11 zueinander diametral angeordnet, so dass Unwuchtprobleme weitestgehend ausgeschlossen werden können.
Die kreisförmigen Öffnungen 11 können selbstverständlich alternative geometrische Formen aufweisen, beispielsweise quadratisch, rechteckig oder dergleichen.Further, the rotor cup 3 on the rotor bottom 9 on connecting means, which are designed as openings 11, as shown in FIG FIG. 2 is shown.
The rotor bottom 9 has, for example, six openings 11, which are arranged in a circle around the axis of rotation 13 around. Of course, a larger or smaller number of openings 11 can be used as connection means for the connecting element 10.
Preferably, opposing openings 11 are arranged diametrically to each other, so that unbalance problems can be largely eliminated.
The circular openings 11 may of course have alternative geometric shapes, such as square, rectangular or the like.

Das Verbindungselement 10 erstreckt sich ausgehend vom Rotorschaft 2 außerhalb des Rotortellers 3 durch die Öffnungen 11 in den Innenraum 5 des Rotortellers 3.
Das einstückige Verbindungselement 10 weist einen Formschluss an der Profilierung 12 des Rotorschaftes 2 sowie an den Öffnungen 11 auf, wodurch eine sichere, drehfeste Verbindung zwischen Rotorteller 3 und Rotorschaft 2 gewährleistet ist.The connecting element 10 extends from the rotor shaft 2 outside the rotor cup 3 through the openings 11 into the interior 5 of the rotor cup 3.
The one-piece connecting element 10 has a positive connection to the profiling 12 of the rotor shaft 2 and to the Openings 11, whereby a secure, rotationally fixed connection between the rotor cup 3 and rotor shaft 2 is ensured.

Gleichzeitig kann durch das als Gussteil ausgebildete Verbindungselement 10 das Massenträgheitsmoment des Spinnrotors 1 im Vergleich zu den bislang üblichen Verbindungen wesentlich herabgesetzt werden, was sich günstig auf das Betriebsverhalten des Spinnrotors auswirkt.At the same time, the mass moment of inertia of the spinning rotor 1 can be significantly reduced compared to the hitherto conventional compounds by the formed as a casting connecting element 10, which has a favorable effect on the performance of the spinning rotor.

Im gezeigten Ausführungsbeispiel gemäß Fig. 1 nimmt die Wandstärke des Verbindungselementes 10 in Richtung des Innenraums 5 (außerhalb des Rotortellers 3) zunächst stetig zu und erreicht im näheren Bereich des Rotorbodens 9 die größte Wandstärke. Im Innenraum 5 nimmt die Wandstärke anschließend leicht ab. Die vorliegende Außenkontur wird hierbei durch die Gussform bestimmt.In the illustrated embodiment according to Fig. 1 takes the wall thickness of the connecting element 10 in the direction of the interior 5 (outside the rotor cup 3) initially steadily increased and reached in the nearer region of the rotor bottom 9, the largest wall thickness. In the interior 5, the wall thickness then decreases slightly. The present outer contour is determined by the casting mold.

Selbstverständlich sind alternative Gestaltungen der Außenkontur ebenfalls denkbar, worauf explizit nicht näher eingegangen wird.Of course, alternative designs of the outer contour are also conceivable, which will not be discussed explicitly.

Der Durchmesser des Rotorschaftes 2 ist geringer als der Durchmesser der zentrischen Bohrung 8.
Das heißt, zwischen dem Rotorschaft 2 und der Bohrung 8 ist Spiel gegeben, das im dargestellten Ausführungsbeispiel ca. 1 mm beträgt.
An der dem Innenraum 5 abgewandten Seite ist der Rotorschaft 2 mit einem Außensechskant 14 ausgestattet, der in Verbindung mit einem entsprechenden, nicht dargestellten Innensechskant an einem Rotorschaftabschnitt, der in der Magnetlagerung verbleibt, eine formschlüssige Verdrehsicherung bildet.The diameter of the rotor shaft 2 is less than the diameter of the central bore eighth
That is, between the rotor shaft 2 and the bore 8 game is given, which is approximately 1 mm in the illustrated embodiment.
At the side facing away from the interior 5, the rotor shaft 2 is provided with an external hexagon 14, which in conjunction with a corresponding hexagon socket, not shown on a rotor shaft portion which remains in the magnetic bearing, forms a positive rotation.

Der Rotorteller 3 besteht im vorliegenden Ausführungsbeispiel, wie bekannt, aus einem Stahl und ist boriert.
Des Weiteren weist der Rotorteller 3, wie ebenfalls bekannt, zusätzlich eine Diamantdispersionsbeschichtung auf.
Der Rotorschaft 2 ist ebenfalls aus einem Stahl gefertigt, welcher im vorliegenden Ausführungsbeispiel ein Chromstahl ist.The rotor cup 3 is in the present embodiment, as is known, made of a steel and is borated.
Furthermore, as is also known, the rotor cup 3 additionally has a diamond dispersion coating.
The rotor shaft 2 is also made of a steel, which in the present embodiment is a chrome steel.

Das Verbindungselement 10 stellt ein dreidimensional gestaltetes Verbindungselement 10 dar, das an den Öffnungen 11, an der Bohrung 8, am Rotorschaft 2, an der Profilierung 12, sowie an den Kontaktflächen des Rotorschaftes 2 mit dem Boden 9 anliegt und damit eine hohe Festigkeit und Drehsicherheit aufweist, ohne sich negativ auf das Massenträgheitsmoment des Spinnrotors 1 auszuwirken.The connecting element 10 represents a three-dimensionally designed connecting element 10, which rests against the openings 11, on the bore 8, on the rotor shaft 2, on the profiling 12, and on the contact surfaces of the rotor shaft 2 with the bottom 9 and thus a high strength and rotational security has, without negatively impact on the moment of inertia of the spinning rotor 1.

Claims (11)

  1. Spinning rotor (1) for an open end rotor spinning machine comprising a rotor shaft (2), a rotor cup (3), which has an opening (4), an inner chamber (5), a rotor groove (6), a conically widening slide wall (7) extending from the opening (4) to the rotor groove (6) and a rotor base (9) arranged opposite the opening (4) and designed with a bore (8), through which the rotor shaft (2) extends at least partially, wherein the rotor shaft (2) is connected by means of a connection element (10) to the rotor cup (3) and the rotor shaft (2) and rotor cup (3) comprise a common rotational axis (13),
    characterised in that
    the rotor shaft (2) and the rotor cup (3) have connection means (11, 12), which are at least partially surrounded by the connection element (10) configured as a cast part, whereby a positive connection of the rotor shaft (2) to the rotor cup (3) can be achieved.
  2. Spinning rotor according to claim 1, characterised in that the rotor shaft (2) has a connection means (12) configured as profiling.
  3. Spinning rotor according to claim 2, characterised in that the profiling (12) is arranged on the rotor shaft (2) at the end and reaches through a bore (8) in the rotor base (9) partially into the inner chamber (5) of the rotor cup (3).
  4. Spinning rotor according to claim 3, characterised in that the profiling (12) is designed as an annular groove, as a helical groove or as knurling.
  5. Spinning rotor according to any one of the preceding claims, characterised in that connection means (11), which are configured as openings, are arranged on the rotor base (9) of the rotor cup (3).
  6. Spinning rotor according to claim 1, characterised in that the connection element (10) is designed as a one-piece diecasting.
  7. Spinning rotor according to claim 6, characterised in that the diecasting (10) is formed from a metal, in particular from Al, Zn, Mg, Ag, Cu, Au, Si, Fe, Ti, Ge, Sn or the like or an alloy made of these metals.
  8. Spinning rotor according to any one of the preceding claims, characterised in that the rotor shaft (2) and the bore (8) in the rotor base (9) are configured in such a way that the rotor shaft (2) is positioned with clearance in the bore (8) prior to casting.
  9. Spinning rotor according to claim 8, characterised in that the clearance is less than 3 mm, preferably less than 1 mm.
  10. Spinning rotor according to claim 1, characterised in that the slide wall (7) has a wall thickness (d), which is in the range of 0.5 mm ≤ d ≤ 1.5 mm, preferably in the range of 0.6 mm ≤ d ≤ 0.8 mm.
  11. Open end rotor spinning machine with a spinning rotor (1) according to any one of the preceding claims.
EP06724234A 2005-05-12 2006-04-11 Spinning rotor Not-in-force EP1882058B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005021920A DE102005021920A1 (en) 2005-05-12 2005-05-12 spinning rotor
PCT/EP2006/003311 WO2006119834A1 (en) 2005-05-12 2006-04-11 Spinning rotor

Publications (2)

Publication Number Publication Date
EP1882058A1 EP1882058A1 (en) 2008-01-30
EP1882058B1 true EP1882058B1 (en) 2011-01-19

Family

ID=36591304

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06724234A Not-in-force EP1882058B1 (en) 2005-05-12 2006-04-11 Spinning rotor

Country Status (7)

Country Link
US (1) US7594384B2 (en)
EP (1) EP1882058B1 (en)
CN (1) CN101180422B (en)
BR (1) BRPI0609909A2 (en)
DE (2) DE102005021920A1 (en)
RU (1) RU2007145678A (en)
WO (1) WO2006119834A1 (en)

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DE102007007260B4 (en) 2007-02-14 2022-04-28 Saurer Spinning Solutions Gmbh & Co. Kg Spinning rotor for an open-end spinning device
CN102134765B (en) * 2010-12-10 2013-07-31 经纬纺织机械股份有限公司 Yarn winding device for spinning cone bobbin of rotor spinning machine
DE102012008693A1 (en) * 2012-04-28 2013-10-31 Oerlikon Textile Gmbh & Co. Kg Open-end spinning rotor
CN103245333B (en) * 2013-05-09 2015-04-22 浙江理工大学 Measurement device for yarn movement in shear flow field in high-speed spinning cup
DE102013108199A1 (en) * 2013-07-31 2015-02-05 Maschinenfabrik Rieter Ag Open-end spinning rotor with a rotor cup, a rotor shaft and a coupling device
DE102014002102A1 (en) * 2014-02-15 2015-08-20 Saurer Germany Gmbh & Co. Kg Open-end spinning rotor
JP6553912B2 (en) * 2015-03-30 2019-07-31 蛇の目ミシン工業株式会社 The outer pot of the sewing machine
DE102015007819A1 (en) 2015-06-18 2016-12-22 Saurer Germany Gmbh & Co. Kg Spinning rotor for an open-end spinning device operating at high rotor speeds
DE102016108859A1 (en) * 2016-05-13 2017-11-16 Rieter Ingolstadt Gmbh Spinning rotor for an open-end spinning device with a friction-increasing coating and open-end spinning device
DE102017129152A1 (en) * 2017-12-07 2019-06-13 Maschinenfabrik Rieter Ag Opening roller for an open-end spinning device and open-end spinning device

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DE10302178A1 (en) 2003-01-22 2004-07-29 Rieter Ingolstadt Spinnereimaschinenbau Ag Spinning rotor for spinning processes comprises a rotor shaft connected to a rotor plate by laser welding and/or electron beam welding

Also Published As

Publication number Publication date
CN101180422A (en) 2008-05-14
WO2006119834A1 (en) 2006-11-16
DE502006008764D1 (en) 2011-03-03
CN101180422B (en) 2010-07-28
DE102005021920A1 (en) 2006-11-16
US20090084081A1 (en) 2009-04-02
EP1882058A1 (en) 2008-01-30
RU2007145678A (en) 2009-06-20
US7594384B2 (en) 2009-09-29
BRPI0609909A2 (en) 2010-05-11

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