EP0583656B1 - Guide for the shaft of an open-end spinning rotor - Google Patents

Guide for the shaft of an open-end spinning rotor Download PDF

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Publication number
EP0583656B1
EP0583656B1 EP93112031A EP93112031A EP0583656B1 EP 0583656 B1 EP0583656 B1 EP 0583656B1 EP 93112031 A EP93112031 A EP 93112031A EP 93112031 A EP93112031 A EP 93112031A EP 0583656 B1 EP0583656 B1 EP 0583656B1
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EP
European Patent Office
Prior art keywords
support
rotor shaft
open
spinning device
rotor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP93112031A
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German (de)
French (fr)
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EP0583656A1 (en
Inventor
Josef Breitenhuber
Manfred Knabel
Edmund Schuller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rieter Ingolstadt Spinnereimaschinenbau AG
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Rieter Ingolstadt Spinnereimaschinenbau AG
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Publication of EP0583656A1 publication Critical patent/EP0583656A1/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
    • D01H4/12—Rotor bearings; Arrangements for driving or stopping

Definitions

  • the invention relates to an open-end rotor spinning device according to the preamble of claim 1 and an aerostatic axial bearing according to the preamble of claim 13.
  • Such a generic rotor spinning device is known from DE 39 42 612 A1.
  • the shaft is supported in a wedge gap of support disks and driven by means of a drive, for example a tangential belt.
  • An axial thrust is generated on the rotor shaft via the support disks, which is supported by an aerostatic axial bearing. This is located on the free end of the rotor shaft facing away from the rotor and is arranged on the machine housing or on the receptacle for the support of the support disks.
  • the overhang of the free end of the rotor shaft is made very short in the practical embodiment. This enables very high speeds to be achieved with the rotor, since the small overhang of the free end of the rotor shaft has a very favorable effect on the vibration behavior of the rotor.
  • the small overhang can be achieved in the generic rotor bearing in that the aerostatic axial bearing only affects the area of the free end of the rotor shaft.
  • complex measures are required in order to seal off the oil vapors emerging from such a bearing which contaminate the rotor spinning device.
  • the generic Offenend spinning device has the disadvantage that the space at the free end of the shaft is extremely narrow are. The result of this is that radial guidance of the shaft end has not hitherto been possible. Such a radial support is particularly favorable if, for example, the rotor has a large imbalance due to contamination and runs unevenly in the bearing. It is possible that the aerostatic bearing is stressed by the radially vibrating free end of the rotor shaft, so that damage to the bearing can occur despite good emergency running properties.
  • the object of the present invention is to design a generic open-end spinning device in such a way that - without giving up the favorable geometric configuration of the open-end spinning device - the device is designed with a radial guide for the free end of the rotor shaft.
  • an improved aerostatic thrust bearing is to be proposed, which can also be used advantageously in particular in an open-end spinning device according to claim 1 and is intended to offer a compact design of the support and thrust bearing.
  • the inventive design of the open-end spinning device ensures that the rotor shaft can be made short, so that the rotor can be operated at the highest rotor speeds.
  • the support By arranging the support, at least partially in the area of last 5 mm of the rotor shaft, it is achieved that the support counteracts the radial movements of the rotor shaft with a favorable lever arm.
  • the short design of the free end of the rotor shaft of up to 10 mm makes it possible to design the rotor shaft as short as possible, so that its vibration behavior is particularly favorable and at the same time provide enough space to provide support in the region of the free end of the rotor shaft to arrange.
  • the support is particularly expedient to arrange the support at least partially in the region of the part of the rotor shaft acted upon by the pair of support disks, because this means that the support simultaneously has sufficient axial expansion to accommodate the movement of the rotor shaft and the projection of the free end of the rotor shaft can nevertheless be made short . It is advantageous to design the support in the form of a shell, so that the rotor shaft can be supported not only in a linear manner but also over the area of the support. This has a favorable influence on the wear of the support and the load on the rotor shaft.
  • the open-end spinning device is particularly simple and compact in that the support forms a structural unit with the axial bearing.
  • the support is not touched by the rotor shaft in normal operation, this has the advantage that no braking forces are transmitted to the rotor shaft, so that it can be operated without loss of energy. If the support is designed in such a way that it supports the rotor shaft at least over a length of 2 mm, it is ensured that the support has a sufficient service life and a reliable support is guaranteed. It is particularly advantageous to form the support from a wear-resistant, heat-resistant material, because this enables a sufficient service life and gentle cooperation with the rotor shaft to be achieved. Carbon materials have proven particularly useful since they also cause low frictional resistance.
  • an aerostatic thrust bearing is designed according to the invention, it is achieved that the known thrust bearings are improved in such a way that they simultaneously form a support for the rotor shaft and the entire unit can be made compact and reliable.
  • the integrated design of the support means that it can be positioned exactly in relation to the bearing plate. An adjustment of the support to the rotor shaft is automatically accomplished with the adjustment of the bearing plate to the rotor shaft.
  • This provides an axial bearing, the service life of which is significantly increased because radial movements of the rotor shaft, which would cause a misalignment from the shaft end to the bearing plate, are prevented.
  • Axial bearings designed in this way have a much longer service life.
  • the free end of the rotor shaft which overhangs over the support disks, can be made extremely short. It is particularly advantageous if the support is designed such that it surrounds the rotor shaft in a shell-like manner. The best case is when the brace the end of the rotor shaft leads like a can.
  • the design of the thrust bearing with a receptacle for the support ensures that it can be securely connected to the thrust bearing and at the same time that the forces which are introduced into the support can be supported by the thrust bearing.
  • a particularly compact configuration is achieved if the bearing plate and the support are formed in one piece. Since the support has practically the same requirements for wear resistance and heat resistance, the combination of both parts can be made from the same material. A carbon material has proven itself as a particularly favorable material for the support and also the bearing plate.
  • Figure 1 shows a side view of an open-end spinning device according to the invention, partly in section.
  • the essential components are the spinning rotor 1 with its shaft 11 and the rotor plate 12, the housing 2 with the rotor housing seal 21, the bearing block 3 with the component 31 for fastening the axial bearing 6 and a receptacle 32 for the support of the support disks 4, which are arranged in pairs Support disks 4 for receiving the rotor shaft, the drive means, a tangential belt 5, for driving the spinning rotor 1 and the aerostatic axial bearing 6 for axially supporting the rotor shaft 11.
  • the spinning rotor 12 is driven via the tangential belt 5.
  • the aerostatic axial bearing 6, on which the rotor shaft 11 is axially supported, has a connection 62 via which the axial bearing is supplied with compressed air.
  • the open-end spinning device is equipped with a support 9 which is fastened to the component 31 via a holder 61. This in turn is connected to the bearing block 3 and is supported on it.
  • the support 9 is approximately half-shell-shaped and surrounds the rotor shaft 11 without touching it in the present case during normal operation of the open-end spinning device.
  • a support according to the invention can also be designed in this way be that it touches the rotor during operation, but a support that does not touch during normal operation is sufficient and requires less energy.
  • the support 9 tends to tilt the rotor around its point of support on the front pair of support disks so limited that no damage and higher loads on the thrust bearing occur. For the sake of clarity, the distance between the two pairs of support disks is relatively large in FIG. 1.
  • the distance can be made much smaller since, in the case of an open-end spinning device equipped according to the invention, the rotor shaft can nevertheless still be stored sufficiently securely in the wedge gap of the pairs of support disks.
  • the distance between the pairs of support disks and thus the length of the rotor shaft no longer needs to be matched to the most unfavorable operating conditions of the spinning rotor when using the present invention. Vibrations and movements of the spinning rotor out of the wedge gap of the pairs of support disks are reliably avoided by the support 9 according to the invention.
  • the support 9 is cup-shaped and extends from the area (A) of the rotor shaft, which cooperates with the pair of support disks in the vicinity of the axial bearing, up to almost the free end 111 of the rotor shaft 11. Due to the short length of the free end 111 of the rotor shaft 11 of maximum 10 mm, the rotor shaft can be made extremely short, with the support 9 simultaneously ensuring that the running of the spinning rotor relative to the axial bearing 6 is so smooth that it is not damaged by radial vibrations of the shaft end can be. It is also conceivable to arrange the support 9 only in the area (A) of the shaft 11, so that the protrusion of the rotor shaft 11 over the pair of support disks 4 can practically assume the value 0.
  • the rotor shaft can be designed to be particularly short and with a favorable length in terms of vibration technology.
  • the distance between the free end 111 and the axial bearing 6 is in reality only a few hundredths of a millimeter during the operation of the open-end spinning device and is shown larger in FIG. 1 for the sake of clarity.
  • the support 9 can be fastened in various ways, in the present case it is connected to the bearing block 3 via the holder 61.
  • the support 9 is formed from a carbon material which is very wear-resistant and at the same time does not work into the surface of the rotor shaft in the event of contact. At the same time, the material is also heat-resistant, so that it does not fail even under long-term stress. In normal operation, there is a gap between the receptacle 9 and the surface of the rotor shaft 11, which is particularly favorable if it is less than 1/10 mm.
  • the axial extent of the support 9 is approximately 8 mm.
  • FIG. 2 shows an advantageous embodiment of a support 9 according to the invention, in which it is integrated into the axial bearing 6.
  • the support 9 is sleeve-shaped and encloses the free one during operation of the open-end spinning device End of the rotor shaft, similar to a sleeve. Movements of the rotor shaft, radially out of its bearing, can thus be reliably suppressed.
  • the support 9 is held in the base body 310 of the axial bearing 6 via the receptacle 60. This can be accomplished, for example, by pressing in the support. In the present case, the support 9 extends approximately 2 mm beyond the bearing plate 63.
  • the thrust bearing 6 also has a throttle device 8 and a connection 62 for compressed air.
  • the bushing 90, which forms the support 9, can be supported in the axial direction either directly on the bearing plate 63 or on an intermediate ring which surrounds the bearing plate 63 radially.
  • FIG. 2b shows a part of the axial bearing 6 according to the invention, in which a support 9 is arranged in the receptacle 60 of the base body 310 and is formed in one piece with the bearing plate 63.
  • the bearing plate 63 is made of a carbon material that is wear-resistant and heat-resistant.
  • the partial view of the open-end spinning device according to the invention from FIG. 3 is equipped with a support 9, which is arranged in the region of the free end of the rotor shaft in a manner similar to that in FIG.
  • the free end 111 of the rotor shaft 11 has a protrusion of 3 mm over the support disks 4 and the support 9 has an axial extent of approximately 6 mm, whereby it also partially encompasses the region of the rotor shaft which is acted upon by the support disks.
  • the support 9 is held in a holder 97 which is screwed onto the component 31 by means of a screw.
  • the side of the support 9 facing the rotor shaft is adapted in a shell-like manner to the contour of the rotor shaft and thereby particularly effectively prevents undesired radial movements of the rotor shaft.
  • the protrusion of the free end of the rotor shaft 111 can be further reduced if either a support 9 with a smaller axial extension is used or the support 9 is arranged over the support disks.

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

Description

Die Erfindung betrifft eine Offenend-Rotorspinnvorrichtung gemäß dem Oberbegriff des Anspruchs 1 sowie ein aerostatisches Axiallager gemäß dem Oberbegriff des Anspruchs 13.The invention relates to an open-end rotor spinning device according to the preamble of claim 1 and an aerostatic axial bearing according to the preamble of claim 13.

Eine solche gattungsgemäße Rotorspinnvorrichtung ist aus der DE 39 42 612 A1 bekannt. Bei einer solchen Vorrichtung wird der Schaft in einem Keilspalt von Stützscheiben gelagert und mittels eines Antriebs z.B. eines Tangentialriemens angetrieben. Über die Stützscheiben wird ein axialer Schub auf den Rotorschaft erzeugt, der von einem aerostatischen Axiallager abgestützt wird. Dieses befindet sich an dem vom Rotor abgewandten freien Ende des Rotorschaftes und ist am Maschinengehäuse oder an der Aufnahme für die Lagerung der Stützscheiben angeordnet. Durch das Bestreben die Rotordrehzahlen immer weiter zu erhöhen, so daß diese mittlerweile bei 120.000 Umdrehungen pro Minute und mehr liegen, wurden die Schäfte der Offenend-Spinnrotoren immer weiter verkürzt, wodurch sich auch der Abstand der Abstützpunkte des Rotorschaftes auf den Stützscheiben in axialer Richtung immer mehr verkürzt hat. Neben den Auflagestellen des Rotors auf den Stützscheiben bildet auch der den Rotor antreibende Tangentialriemen oder eine Antriebsscheibe eine zusätzliche Fixierung des Rotors, weil dadurch der Schaft in die Keilspalten der Stützscheibenpaare hineingedrückt wird.Such a generic rotor spinning device is known from DE 39 42 612 A1. In such a device, the shaft is supported in a wedge gap of support disks and driven by means of a drive, for example a tangential belt. An axial thrust is generated on the rotor shaft via the support disks, which is supported by an aerostatic axial bearing. This is located on the free end of the rotor shaft facing away from the rotor and is arranged on the machine housing or on the receptacle for the support of the support disks. The endeavors of the open-end spinning rotors were shortened further and further, due to the endeavor to continuously increase the rotor speeds, so that these are now at 120,000 revolutions per minute, which means that the distance between the support points of the rotor shaft on the support disks in the axial direction always increases shortened more. In addition to the contact points of the rotor on the support disks, the tangential belt driving the rotor or a drive pulley also forms an additional fixation of the rotor because this pushes the shaft into the wedge gaps of the support disk pairs.

Für Offenend Spinnvorrichtungen bei denen sich der Schaft des Spinnrotors axial an einer Kugel abstützt, wie sie beispielsweise in der DE 36 22 523 A1 gezeigt sind, ist es bekannt, die Abdichtungen für das Axiallager so auszubilden, daß bei Veränderung des Stützscheibendurchmessers der Rotorschaft an einer Gleitfläche anlaufen kann, um die Dichtung für das Axiallager zu schonen. Dazu ist vorgesehen den Überhang des Schaftes, d. h. die Länge des Schaftes von dem dem Axiallager zugewandten Stützscheibenpaar bis zum freien Ende des Rotorschaftes mit einer Länge von ca. 20 mm auszubilden.For open spinning devices in which the shaft of the spinning rotor is supported axially on a ball, as are shown, for example, in DE 36 22 523 A1, it is known to design the seals for the thrust bearing in such a way that when the diameter of the support disk changes, the rotor shaft on one Sliding surface can start to protect the seal for the thrust bearing. For this purpose, the overhang of the shaft, d. H. to form the length of the shaft with a length of approximately 20 mm from the pair of support disks facing the axial bearing to the free end of the rotor shaft.

Bei der gattungsgemäßen Rotorspinnvorrichtung gemäß der DE 39 42 612 A1 ist in der praktischen Ausführung der Überhang des freien Endes des Rotorschaftes sehr kurz ausgebildet. Dadurch können sehr hohe Drehzahlen mit dem Rotor erreicht werden, da sich der geringe Überhang des freien Endes des Rotorschaftes sehr günstig auf das Schwingungsverhalten des Rotors auswirkt. Der geringe Überhang kann beim gattungsgemäßen Rotorlager dadurch erreicht werden, daß das aerostatische Axiallager lediglich die Fläche des freien Endes des Rotorschaftes beeinflußt. Bei Axiallagern, die mittels einer mit Öl geschmierten Kugel betrieben werden, sind aufwendige Maßnahmen erforderlich, um die aus einem solchen Lager austretenden Öldämpfe, die die Rotorspinnvorrichtung verunreinigen, abzudichten. Anders als diese hat jedoch die gattungsgemäße Offenend Spinnvorrichtung den Nachteil, daß die Platzverhältnisse am freien Ende des Schaftes extrem eingeengt sind. Dies hat zur Folge, daß eine radiale Führung des Schaftendes bisher nicht verwirklicht werden konnte. Eine solche radiale Abstützung ist dann besonders günstig, wenn beispielsweise durch Verunreinigungen des Rotors dieser eine große Unwucht besitzt und im Lager unruhig läuft. Dabei ist es möglich, daß das aerostatische Lager durch das radial schwingende freie Ende des Rotorschaftes verstärkt beansprucht wird, so daß trotz guter Notlaufeigenschaften eine Beschädigung des Lagers entstehen kann.In the generic rotor spinning device according to DE 39 42 612 A1, the overhang of the free end of the rotor shaft is made very short in the practical embodiment. This enables very high speeds to be achieved with the rotor, since the small overhang of the free end of the rotor shaft has a very favorable effect on the vibration behavior of the rotor. The small overhang can be achieved in the generic rotor bearing in that the aerostatic axial bearing only affects the area of the free end of the rotor shaft. In the case of axial bearings which are operated by means of a ball lubricated with oil, complex measures are required in order to seal off the oil vapors emerging from such a bearing which contaminate the rotor spinning device. Unlike this, however, the generic Offenend spinning device has the disadvantage that the space at the free end of the shaft is extremely narrow are. The result of this is that radial guidance of the shaft end has not hitherto been possible. Such a radial support is particularly favorable if, for example, the rotor has a large imbalance due to contamination and runs unevenly in the bearing. It is possible that the aerostatic bearing is stressed by the radially vibrating free end of the rotor shaft, so that damage to the bearing can occur despite good emergency running properties.

Aufgabe der vorliegenden Erfindung ist es, eine gattungsgemäße Offenend-Spinnvorrichtung derart auszugestalten, daß-ohne die günstige geometrische Ausgestaltung der Offenend Spinnvorrichtung aufzugeben-die Vorrichtung mit einer radialen Führung des freien Endes des Rotorschaftes auszugestalten.The object of the present invention is to design a generic open-end spinning device in such a way that - without giving up the favorable geometric configuration of the open-end spinning device - the device is designed with a radial guide for the free end of the rotor shaft.

Weiterhin soll ein verbessertes aerostatisches Axiallager vorgeschlagen werden, das insbesondere auch bei einer Offenend-Spinnvorrichtung gemäß Anspruch 1 vorteilhaft Verwendung finden kann und eine kompakte Ausgestaltung von Abstützung und Axiallager bieten soll.Furthermore, an improved aerostatic thrust bearing is to be proposed, which can also be used advantageously in particular in an open-end spinning device according to claim 1 and is intended to offer a compact design of the support and thrust bearing.

Diese Aufgaben werden erfindungsgemäß durch die Merkmale der Ansprüche 1 und 13 gelöst. Durch die erfindungsgemäße Ausgestaltung der Offenend-Spinnvorrichtung wird erreicht, daß der Rotorschaft kurz ausgebildet werden kann, wodurch der Rotor mit höchsten Rotordrehzahlen betrieben werden kann. Durch die Anordnung der Abstützung, wenigstens teilweise im Bereich der letzten 5 mm des Rotorschaftes, wird erreicht, daß die Abstützung mit einem günstigen Hebelarm den radialen Bewegungen des Rotorschaftes entgegenwirkt. Durch die kurze Ausbildung des freien Endes des Rotorschaftes von bis zu 10 mm, wird ermöglicht, den Rotorschaft möglichst kurz auszubilden, so daß dessen Schwingungsverhalten besonders günstig ist und gleichzeitig genügend Raum zur Verfügung zu stellen, um eine Abstützung im Bereich des freien Endes des Rotorschaftes anzuordnen. Besonders günstig ist es, die Abstützung wenigstens teilweise im Bereich des von dem Stützscheibenpaar beaufschlagten Teil des Rotorschaftes anzuordnen, weil dadurch die Abstützung gleichzeitig eine genügende axiale Ausdehnung zur Aufnahme der Bewegung des Rotorschaftes besitzt und trotzdem der Überstand des freien Endes des Rotorschaftes kurz ausgebildet werden kann. Von Vorteil ist es, die Abstützung schalenförmig auszubilden, so daß der Rotorschaft sich an der Abstützung nicht nur linienförmig, sondern flächig abstützen kann. Dadurch wird der Verschleiß der Abstützung und die Belastung des Rotorschaftes günstig beeinflußt. Besonders einfach und kompakt wird die Offenend-Spinnvorrichtung dadurch, daß die Abstützung mit dem Axiallager eine Baueinheit bildet. Wird im Normalbetrieb die Abstützung vom Rotorschaft nicht berührt, hat dies den Vorteil, daß keine Bremskräfte auf den Rotorschaft übertragen werden, so daß dieser ohne Energieverlust betrieben werden kann. Wird die Abstützung derart ausgebildet, daß sie den Rotorschaft wenigstens auf einer Länge von 2 mm abstützt, wird gewährleitstt, daß eine genügende Lebensdauer der Abstützung sowie eine betriebssichere Abstützung gewährleistet ist. Besonders vorteilhaft ist es, die Abstützung aus einem verschleißfesten, hitzebeständigen Material auszubilden, weil dadurch eine genügende Lebensdauer sowie eine schonende Zusammenarbeit mit dem Rotorschaft erreicht werden kann. Besonders bewährt haben sich dabei Kohlenstoff-Werkstoffe, da diese auch einen geringen Reibwiderstand verursachen.According to the invention, these objects are achieved by the features of claims 1 and 13. The inventive design of the open-end spinning device ensures that the rotor shaft can be made short, so that the rotor can be operated at the highest rotor speeds. By arranging the support, at least partially in the area of last 5 mm of the rotor shaft, it is achieved that the support counteracts the radial movements of the rotor shaft with a favorable lever arm. The short design of the free end of the rotor shaft of up to 10 mm makes it possible to design the rotor shaft as short as possible, so that its vibration behavior is particularly favorable and at the same time provide enough space to provide support in the region of the free end of the rotor shaft to arrange. It is particularly expedient to arrange the support at least partially in the region of the part of the rotor shaft acted upon by the pair of support disks, because this means that the support simultaneously has sufficient axial expansion to accommodate the movement of the rotor shaft and the projection of the free end of the rotor shaft can nevertheless be made short . It is advantageous to design the support in the form of a shell, so that the rotor shaft can be supported not only in a linear manner but also over the area of the support. This has a favorable influence on the wear of the support and the load on the rotor shaft. The open-end spinning device is particularly simple and compact in that the support forms a structural unit with the axial bearing. If the support is not touched by the rotor shaft in normal operation, this has the advantage that no braking forces are transmitted to the rotor shaft, so that it can be operated without loss of energy. If the support is designed in such a way that it supports the rotor shaft at least over a length of 2 mm, it is ensured that the support has a sufficient service life and a reliable support is guaranteed. It is particularly advantageous to form the support from a wear-resistant, heat-resistant material, because this enables a sufficient service life and gentle cooperation with the rotor shaft to be achieved. Carbon materials have proven particularly useful since they also cause low frictional resistance.

Wird ein aerostatisches Axiallager gemäß der Erfindung ausgestaltet, wird erreicht, daß die bekannten Axiallager derart verbessert werden, daß sie gleichzeitig eine Abstützung für den Rotorschaft bilden und die ganze Einheit kompakt und zuverlässig ausgebildet werden kann. Durch die integrierte Ausgestaltung der Abstützung wird erreicht, daß diese im Bezug auf die Lagerplatte exakt positioniert werden kann. Eine Einstellung von Abstützung zum Rotorschaft wird automatisch mit der Einstellung der Lagerplatte zum Rotorschaft mit bewerkstelligt. Es wird dadurch ein Axiallager zur Verfügung gestellt, dessen Lebensdauer wesentlich erhöht wird, weil radiale Bewegungen des Rotorschaftes, die eine Fehlstellung von Schaftende zu Lagerplatte verursachen würden, verhindert werden. Derart ausgebildete Axiallager haben eine weitaus höhere Lebensdauer. Durch die Anordnung der Abstützung unmittelbar an der Lagerplatte kann das über die Stützscheiben überhängende, freie Ende des Rotorschaftes extrem kurz ausgebildet werden. Besonders vorteilhaft ist es dabei, wenn die Abstützung so ausgestaltet ist, daß sie den Rotorschaft schalenförmig umgibt. Der günstigste Fall ist dabei, wenn die Abstützung büchsenförmig das Ende des Rotorschaftes führt. Durch die Ausbildung des Axiallagers mit einer Aufnahme für die Abstützung wird erreicht, daß diese sicher mit dem Axiallager verbunden werden kann und gleichzeitig die Kräfte, die in die Abstützung eingeleitet werden, vom Axiallager abgestützt werden können. Eine besonders kompakte Ausgestaltung wird erreicht, wenn die Lagerplatte und die Abstützung einteilig ausgebildet sind. Da an die Abstützung praktisch die gleichen Anforderungen an Verschleißfestigkeit und Hitzebeständigkeit gestellt werden, kann die Kombination beider Teile aus dem gleichen Werkstoff hergestellt werden. Als besonders günstiger Werkstoff für die Abstützung und auch die Lagerplatte hat sich ein Kohlenstoff-Werkstoff bewährt.If an aerostatic thrust bearing is designed according to the invention, it is achieved that the known thrust bearings are improved in such a way that they simultaneously form a support for the rotor shaft and the entire unit can be made compact and reliable. The integrated design of the support means that it can be positioned exactly in relation to the bearing plate. An adjustment of the support to the rotor shaft is automatically accomplished with the adjustment of the bearing plate to the rotor shaft. This provides an axial bearing, the service life of which is significantly increased because radial movements of the rotor shaft, which would cause a misalignment from the shaft end to the bearing plate, are prevented. Axial bearings designed in this way have a much longer service life. By arranging the support directly on the bearing plate, the free end of the rotor shaft, which overhangs over the support disks, can be made extremely short. It is particularly advantageous if the support is designed such that it surrounds the rotor shaft in a shell-like manner. The best case is when the brace the end of the rotor shaft leads like a can. The design of the thrust bearing with a receptacle for the support ensures that it can be securely connected to the thrust bearing and at the same time that the forces which are introduced into the support can be supported by the thrust bearing. A particularly compact configuration is achieved if the bearing plate and the support are formed in one piece. Since the support has practically the same requirements for wear resistance and heat resistance, the combination of both parts can be made from the same material. A carbon material has proven itself as a particularly favorable material for the support and also the bearing plate.

Im Folgenden wird die Erfindung an Hand von zeichnerischen Darstellungen beschrieben.

Figur 1
zeigt eine Seitenansicht einer erfindungsgemäßen Vorrichtung;
Figur 2a
eine erfindungsgemäße Ausgestaltung des Axiallagers von Figur 1;
Figur 2b
eine Teilansicht eines erfindungsgemäßen Axiallagers im Schnitt;
Figur 3
eine vergrößerte Darstellung des Bereichs des Rotorschaftendes einer erfindungsgemäß ausgestalteten Offenend-Spinnvorrichtung.
The invention is described below with the aid of drawings.
Figure 1
shows a side view of a device according to the invention;
Figure 2a
an inventive design of the axial bearing of Figure 1;
Figure 2b
a partial view of a thrust bearing according to the invention in section;
Figure 3
an enlarged view of the area of the rotor shaft end of a designed according to the invention Open-end spinning device.

Figur 1 zeigt eine Seitenansicht einer erfindungsgemäßen Offenend-Spinnvorrichtung teilweise im Schnitt. Die wesentlichen Bestandteile sind der Spinnrotor 1 mit seinem Schaft 11 und dem Rotorteller 12, das Gehäuse 2 mit der Rotorgehäusedichtung 21, der Lagerbock 3 mit dem Bauteil 31 zum Befestigen des Axiallagers 6 und einer Aufnahme 32 für die Lagerung der Stützscheiben 4, die paarweise angeordneten Stützscheiben 4 zur Aufnahme des Rotorschaftes, das Antriebsmittel, ein Tangentialriemen 5, zum Antrieb des Spinnrotors 1 und das aerostatische Axiallager 6 zur axialen Abstützung des Rotorschaftes 11. Sowohl bei dem in Nähe des Spinnrotors 12 angeordneten Stützscheibenpaar, wie auch bei dem in Nähe des freien Endes 111 des Rotorschaftes 11 angeordneten Stützscheibenpaar 4, ist jeweils nur eine Stützscheibe des Paares eingezeichnet. Der Antrieb des Spinnrotors 12 erfolgt über den Tangentialriemen 5. Das aerostatische Axiallager 6, an dem sich der Rotorschaft 11 axial abstützt, besitzt einen Anschluß 62, über den das Axiallager mit Druckluft versorgt wird. Erfindungsgemäß ist die Offenend-Spinnvorrichtung mit einer Abstützung 9 ausgestattet, die über einen Halter 61 am Bauteil 31 befestigt ist. Dieses ist seinerseits mit dem Lagerbock 3 verbunden und stützt sich daran ab. Die Abstützung 9 ist in etwa halbschalenförmig ausgebildet und umgreift den Rotorschaft 11 ohne ihn im vorliegenden Fall während des normalen Betriebs der Offenend-Spinnvorrichtung zu berühren. Zwar kann eine erfindungsgemäße Abstützung auch so ausgebildet sein, daß sie während des Betriebs den Rotor berührt, jedoch ist eine im Normalbetrieb nicht berührende Abstützung ausreichend und erfordert einen geringeren Energieaufwand. Durch die Abstützung 9 werden Bestrebungen des Rotors um seinen Auflagepunkt am vorderen Stützscheibenpaar zu kippen, so begrenzt, daß keine Beschädigungen und höheren Belastungen des Axiallagers auftreten. Der Abstand zwischen den beiden Stützscheibenpaaren ist bei Figur 1 der Deutlichkeit halber relativ groß ausgebildet. In der Praxis kann der Abstand jedoch weit geringer ausgebildet sein, da bei einer erfindungsgemäß ausgestatteten Offenend-Spinnvorrichtung der Rotorschaft trotzdem noch ausreichend sicher im Keilspalt der Stützscheibenpaare gelagert werden kann. Der Abstand der Stützscheibenpaare und damit die Lange des Rotorschaftes braucht bei Einsatz der vorliegenden Erfindung nicht mehr auf die ungünstigsten Betriebsverhältnisse des Spinnrotors abgestimmt zu sein. Schwingungen und Bewegungen des Spinnrotors heraus aus dem Keilspalt der Stützscheibenpaare werden durch die erfindungsgemäße Abstützung 9 sicher vermieden. Die Abstützung 9 ist schalenförmig ausgebildet und erstreckt sich vom Bereich (A) des Rotorschaftes, der mit dem Stützscheibenpaar in Nähe des Axiallagers zusammenarbeitet, bis fast zum freien Ende 111 des Rotorschaftes 11. Durch die geringe Länge des freien Endes 111 des Rotorschaftes 11 von maximal 10 mm, kann der Rotorschaft extrem kurz ausgebildet werden, wobei durch die Abstützung 9 gleichzeitig dafür gesorgt wird, daß der Lauf des Spinnrotors relativ zum Axiallager 6 so ruhig ist, daß dieses nicht durch radiale Schwingungen des Schaftendes beschädigt werden kann. Es ist auch denkbar, die Abstützung 9 nur im Bereich (A) des Schaftes 11 anzuordnen, so daß der Überstand des Rotorschaftes 11 über das Stützscheibenpaar 4 praktisch den Wert 0 annehmen kann. Dadurch wird der Rotorschaft besonders kurz und schwingungstechnisch mit einer günstigen Länge ausbildbar. Der Abstand zwischen dem freien Ende 111 und dem Axiallager 6 beträgt in der Realität nur wenige hundertstel Millimeter während des Betriebes der Offenend-Spinnvorrichtung und ist in Figur 1 der Deutlichkeit halber größer dargestellt.Figure 1 shows a side view of an open-end spinning device according to the invention, partly in section. The essential components are the spinning rotor 1 with its shaft 11 and the rotor plate 12, the housing 2 with the rotor housing seal 21, the bearing block 3 with the component 31 for fastening the axial bearing 6 and a receptacle 32 for the support of the support disks 4, which are arranged in pairs Support disks 4 for receiving the rotor shaft, the drive means, a tangential belt 5, for driving the spinning rotor 1 and the aerostatic axial bearing 6 for axially supporting the rotor shaft 11. Both in the case of the pair of supporting disks arranged in the vicinity of the spinning rotor 12 and in the vicinity of the free one End 111 of the rotor shaft 11 arranged support plate pair 4, only one support plate of the pair is shown. The spinning rotor 12 is driven via the tangential belt 5. The aerostatic axial bearing 6, on which the rotor shaft 11 is axially supported, has a connection 62 via which the axial bearing is supplied with compressed air. According to the invention, the open-end spinning device is equipped with a support 9 which is fastened to the component 31 via a holder 61. This in turn is connected to the bearing block 3 and is supported on it. The support 9 is approximately half-shell-shaped and surrounds the rotor shaft 11 without touching it in the present case during normal operation of the open-end spinning device. A support according to the invention can also be designed in this way be that it touches the rotor during operation, but a support that does not touch during normal operation is sufficient and requires less energy. The support 9 tends to tilt the rotor around its point of support on the front pair of support disks so limited that no damage and higher loads on the thrust bearing occur. For the sake of clarity, the distance between the two pairs of support disks is relatively large in FIG. 1. In practice, however, the distance can be made much smaller since, in the case of an open-end spinning device equipped according to the invention, the rotor shaft can nevertheless still be stored sufficiently securely in the wedge gap of the pairs of support disks. The distance between the pairs of support disks and thus the length of the rotor shaft no longer needs to be matched to the most unfavorable operating conditions of the spinning rotor when using the present invention. Vibrations and movements of the spinning rotor out of the wedge gap of the pairs of support disks are reliably avoided by the support 9 according to the invention. The support 9 is cup-shaped and extends from the area (A) of the rotor shaft, which cooperates with the pair of support disks in the vicinity of the axial bearing, up to almost the free end 111 of the rotor shaft 11. Due to the short length of the free end 111 of the rotor shaft 11 of maximum 10 mm, the rotor shaft can be made extremely short, with the support 9 simultaneously ensuring that the running of the spinning rotor relative to the axial bearing 6 is so smooth that it is not damaged by radial vibrations of the shaft end can be. It is also conceivable to arrange the support 9 only in the area (A) of the shaft 11, so that the protrusion of the rotor shaft 11 over the pair of support disks 4 can practically assume the value 0. As a result, the rotor shaft can be designed to be particularly short and with a favorable length in terms of vibration technology. The distance between the free end 111 and the axial bearing 6 is in reality only a few hundredths of a millimeter during the operation of the open-end spinning device and is shown larger in FIG. 1 for the sake of clarity.

Die Abstützung 9 kann auf verschiedene Art befestigt werden, sie ist im vorliegenden Fall über den Halter 61 mit dem Lagerbock 3 verbunden. Die Abstützung 9 ist aus einem Kohlenstoff-Werkstoff ausgebildet, der sehr verschleißfest ist und gleichzeitig sich nicht in die Oberfläche des Rotorschaftes im Falle einer Berührung einarbeitet. Gleichzeitig ist der Werkstoff auch hitzebeständig, so daß er auch bei längerfristiger Belastung nicht ausfällt. Zwischen der Aufnahme 9 und der Oberfläche des Rotorschaftes 11 ist im Normalbetrieb ein Spalt, der besonders günstig ist, wenn er weniger als 1/10 mm beträgt. Die axiale Ausdehnung der Abstützung 9 beträgt ca. 8 mm.The support 9 can be fastened in various ways, in the present case it is connected to the bearing block 3 via the holder 61. The support 9 is formed from a carbon material which is very wear-resistant and at the same time does not work into the surface of the rotor shaft in the event of contact. At the same time, the material is also heat-resistant, so that it does not fail even under long-term stress. In normal operation, there is a gap between the receptacle 9 and the surface of the rotor shaft 11, which is particularly favorable if it is less than 1/10 mm. The axial extent of the support 9 is approximately 8 mm.

Figur 2 zeigt eine vorteilhafte Ausgestaltung einer erfindungsgemäßen Abstützung 9, bei der diese in das Axiallager 6 integriert ist. Die Abstützung 9 ist büchsenförmig und umschließt im Betrieb der Offenend-Spinnvorrichtung das freie Ende des Rotorschaftes, ähnlich einer Büchse. Bewegungen des Rotorschaftes, radial aus seiner Lagerung heraus können damit sicher unterdrückt werden. Die Abstützung 9 ist im Grundkörper 310 des Axiallagers 6 über die Aufnahme 60 gehalten. Dies kann beispielsweise durch Einpressen der Abstützung bewerkstelligt werden. Die Abstützung 9 erstreckt sich im vorliegenden Fall ca. 2 mm über die Lagerplatte 63 hinaus. Da der Lagerspalt zwischen Lagerplatte 63 und Rotorschaftende 111 weniger als 1/10 mm beträgt, genügt die axiale Ausdehnung der Abstützung 9 zur sicheren radialen Abstützung des Rotorschaftes gegen radiale Schwingungen. Das Axiallager 6 besitzt daneben noch eine Drosselvorrichtung 8 sowie einen Anschluß 62 für Druckluft. Die Büchse 90, die die Abstützung 9 bildet, kann sich in axialer Richtung entweder auf der Lagerplatte 63 direkt abstützen oder an einem Zwischenring, der die Lagerplatte 63 radial umgreift.Figure 2 shows an advantageous embodiment of a support 9 according to the invention, in which it is integrated into the axial bearing 6. The support 9 is sleeve-shaped and encloses the free one during operation of the open-end spinning device End of the rotor shaft, similar to a sleeve. Movements of the rotor shaft, radially out of its bearing, can thus be reliably suppressed. The support 9 is held in the base body 310 of the axial bearing 6 via the receptacle 60. This can be accomplished, for example, by pressing in the support. In the present case, the support 9 extends approximately 2 mm beyond the bearing plate 63. Since the bearing gap between the bearing plate 63 and the rotor shaft end 111 is less than 1/10 mm, the axial extension of the support 9 is sufficient for the reliable radial support of the rotor shaft against radial vibrations. The thrust bearing 6 also has a throttle device 8 and a connection 62 for compressed air. The bushing 90, which forms the support 9, can be supported in the axial direction either directly on the bearing plate 63 or on an intermediate ring which surrounds the bearing plate 63 radially.

Figur 2b zeigt einen Teil des erfindungsgemäßen Axiallagers 6, bei dem in der Aufnahme 60 des Grundkörpers 310 eine Abstützung 9 angeordnet ist, die einteilig mit der Lagerplatte 63 ausgebildet ist. Sowohl bei Figur 2a als auch bei Figur 2b ist die Lagerplatte 63 aus einem Kohlenstoff-Werkstoff ausgebildet, der verschleißfest und hitzebeständig ist.FIG. 2b shows a part of the axial bearing 6 according to the invention, in which a support 9 is arranged in the receptacle 60 of the base body 310 and is formed in one piece with the bearing plate 63. Both in FIG. 2a and in FIG. 2b, the bearing plate 63 is made of a carbon material that is wear-resistant and heat-resistant.

Die Teilansicht der erfindungsgemäßen Offenend-Spinnvorrichtung von Figur 3 ist mit einer Abstützung 9 ausgestattet, die im Bereich des freien Endes des Rotorschaftes ähnlich wie bei Figur 1 angeordnet ist. Das freie Ende 111 des Rotorschaftes 11 hat einen Überstand von 3 mm über die Stützscheiben 4 und die Abstützung 9 eine axiale Ausdehnung von ca. 6mm, wobei sie ebenfalls teilweise in den Bereich des Rotorschaftes umgreift, der von den Stützscheiben beaufschlagt ist. Die Abstützung 9 wird in einer Halterung 97 gehalten, die mittels einer Schraube am Bauteil 31 angeschraubt ist. Die dem Rotorschaft zugewandte Seite der Abstützung 9 ist schalenförmig der Kontur des Rotorschaftes angepaßt und verhindert dadurch besonders wirkungsvoll unerwünschte radiale Bewegungen des Rotorschaftes. Der Überstand des freien Endes des Rotorschaftes 111 kann weiter verkürzt werden, wenn entweder eine Abstützung 9 mit geringerer axialer Ausdehnung eingesetzt wird oder die Abstützung 9 über den Stützscheiben angeordnet wird.The partial view of the open-end spinning device according to the invention from FIG. 3 is equipped with a support 9, which is arranged in the region of the free end of the rotor shaft in a manner similar to that in FIG. The free end 111 of the rotor shaft 11 has a protrusion of 3 mm over the support disks 4 and the support 9 has an axial extent of approximately 6 mm, whereby it also partially encompasses the region of the rotor shaft which is acted upon by the support disks. The support 9 is held in a holder 97 which is screwed onto the component 31 by means of a screw. The side of the support 9 facing the rotor shaft is adapted in a shell-like manner to the contour of the rotor shaft and thereby particularly effectively prevents undesired radial movements of the rotor shaft. The protrusion of the free end of the rotor shaft 111 can be further reduced if either a support 9 with a smaller axial extension is used or the support 9 is arranged over the support disks.

Claims (18)

  1. An open-end spinning device, with a spinning rotor (12), which is held in wedge-shaped gaps in pairs of support discs (4) and upon which is exerted an axial force acting in the direction towards the free end (111) of its rotor shaft (11), wherein the spinning rotor (12) is driven by a driving means by way of its shaft (11), and with an aerostatic axial bearing (6) with a bearing plate (63) and a base (310), characterized in that a support (9) for limiting the radial movement of the rotor shaft (11) is provided in the region between the free end (111) of the rotor shaft (11) and the region (A) acted upon by the pair of support discs (4) arranged closest to the free end (111), wherein the free end (111) of the rotor shaft (11) projects beyond the pair of support discs (4) by up to 10 mm and the radial support (9) is provided at least in part in the region of the last 5 mm of the rotor shaft (11).
  2. An open-end spinning device according to Claim 1, characterized in that the support (9) does not touch the rotor shaft (11) during the normal operation of the device.
  3. An open-end spinning device according to Claim 1 or 2, characterized in that the support (9) supports the rotor shaft (11) over a length of at least 2 mm.
  4. An open-end spinning device according to one or more of Claims 1 to 3, characterized in that the support (9) is provided at least in part in the region (A) of the rotor shaft (11) which is acted upon by the pair of support discs (4).
  5. An open-end spinning device according to one or more of Claims 1 to 4, characterized in that the support (9) supports part of the periphery of the rotor shaft (11) in the manner of a shell.
  6. An open-end spinning device according to one or more of Claims 1 to 5, characterized in that the support (9) forms a structural unit with the aerostatic axial bearing (6).
  7. An open-end spinning device according to Claim 6, characterized in that the support (9) is arranged in a receiving means (60) of the base (310) of the axial bearing (6).
  8. An open-end spinning device according to Claim 6 or 7, characterized in that the support (9) is formed at least in part in the form of a sleeve (90).
  9. An open-end spinning device according to one or more of Claims 6 to 8, characterized in that the bearing plate (63) of the axial bearing (6) and the support (9) are formed integrally.
  10. An open-end spinning device according to one or more of Claims 1 to 9, characterized in that the support (9) consists of a wear-resistant material.
  11. An open-end spinning device according to Claim 10, characterized in that the support (9) consists of a heat-resistant material.
  12. An open-end spinning device according to Claim 10 or 11, characterized in that the support (9) consists of a carbon material.
  13. An aerostatic axial bearing (6) for an open-end spinning device with a spinning rotor (12), upon which is exerted an axial force acting in the direction towards the free end (111) of its rotor shaft (11), and the axial bearing has a base (310) and a bearing plate (63) for supporting the rotor shaft, characterized in that a support (9) for bounding the radial movement of the rotor shaft (11) is incorporated in the axial bearing (6), the support (9) extending - as viewed from the bearing plate (63) - in the direction of the shaft (11) of the rotor (12) supported by the bearing plate (63).
  14. An axial bearing according to Claim 13, characterized in that the support (9) is constructed at least in part in the form of a shell, so that it is able at least in part to engage around a rotor shaft cooperating with the axial bearing.
  15. An axial bearing according to Claim 13 or 14, characterized in that the base (310) of the axial bearing (6) has a receiving means (60) for the support (9).
  16. An axial bearing according to one or more of Claims 13 to 15, characterized in that the support (9) is constructed integrally with the bearing plate (63).
  17. An axial bearing according to one or more of Claims 13 to 16, characterized in that the support (9) is constructed from a wear-resistant and/or heat-resistant material.
  18. An axial bearing according to one or more of Claims 13 to 17, characterized in that the bearing plate (63) and/or the support (9) consists of a carbon material.
EP93112031A 1992-08-07 1993-07-28 Guide for the shaft of an open-end spinning rotor Expired - Lifetime EP0583656B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4226193 1992-08-07
DE4226193 1992-08-07

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EP0583656B1 true EP0583656B1 (en) 1995-09-20

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DE (1) DE59300623D1 (en)

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DE4423605B4 (en) * 1994-07-06 2007-05-24 Rieter Ingolstadt Spinnereimaschinenbau Ag Storage for an open-end spinning rotor
CZ289599B6 (en) * 1994-11-29 2002-03-13 Gerhard Wanger Spindle for gas lubricated bearing of a rapidly rotating tool
DE69632202T2 (en) * 1995-07-28 2005-04-21 Cardiotronics Int Inc ELECTRICAL DISPOSABLE DEVICE
DE59700010D1 (en) * 1996-03-05 1998-09-17 Rieter Ingolstadt Spinnerei Open-end spinning device
DE19630477A1 (en) * 1996-07-27 1998-01-29 Rieter Ingolstadt Spinnerei Open-end spinning device
DE19630476A1 (en) * 1996-07-27 1998-01-29 Rieter Ingolstadt Spinnerei Open-end spinning device
DE19642471B4 (en) * 1996-10-15 2005-05-19 Saurer Gmbh & Co. Kg Open-end spinning device with a single-motor driven spinning rotor
DE19734425A1 (en) * 1997-08-08 1999-02-11 Schurr Stahlecker & Grill Spinning rotor shaft footstep bearing
IT1318240B1 (en) * 2000-07-25 2003-07-28 Balance Systems Spa AXIAL STOP DEVICE OF A ROTOR, IN PARTICULAR OF AN ELECTRIC MOTOR ARMATURE, FOR BALANCING MACHINES.
DE10143288A1 (en) * 2001-09-04 2003-03-20 Rieter Ingolstadt Spinnerei Axial bearing for open-end spinning rotor, includes intermediate piece with flat bearing surface arranged as aerostatic bearing
EP1927687A3 (en) * 2006-11-29 2010-01-20 Rieter Ingolstadt GmbH Open-end spinning apparatus with an aerostatic axial bearing for a spin rotor, aerostatic axial bearing and method for manufacturing an aerostatic axial bearing

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DE7708087U1 (en) * 1977-03-16 1977-06-30 Skf Kugellagerfabriken Gmbh, 8720 Schweinfurt AXIAL GUIDE FOR THE SHAFT OF A SPINNING ROTOR O.DGL MOUNTED ON SUPPORTING ROLLERS.
DE3346843A1 (en) * 1983-12-23 1985-07-11 Schubert & Salzer Maschinenfabrik Ag, 8070 Ingolstadt OPEN-END ROTOR SPIDER
DE3401315A1 (en) * 1984-01-17 1985-07-18 Fritz 7347 Bad Überkingen Stahlecker DEVICE FOR STORING AND DRIVING A SPINNING ROTOR OF AN OE-SPINNING DEVICE
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DE3523116A1 (en) * 1985-06-28 1987-01-08 Schubert & Salzer Maschinen Open-end rotor-spinning device
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DE3942612C2 (en) * 1989-12-25 2003-05-08 Rieter Ingolstadt Spinnerei Open-end spinning device

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US5522211A (en) 1996-06-04
EP0583656A1 (en) 1994-02-23
US5450718A (en) 1995-09-19
DE59300623D1 (en) 1995-10-26

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