EP0794273A1 - Open-end spinning device - Google Patents

Open-end spinning device Download PDF

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Publication number
EP0794273A1
EP0794273A1 EP97102380A EP97102380A EP0794273A1 EP 0794273 A1 EP0794273 A1 EP 0794273A1 EP 97102380 A EP97102380 A EP 97102380A EP 97102380 A EP97102380 A EP 97102380A EP 0794273 A1 EP0794273 A1 EP 0794273A1
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EP
European Patent Office
Prior art keywords
carbide
open
spinning device
end spinning
shaft
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.)
Granted
Application number
EP97102380A
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German (de)
French (fr)
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EP0794273B1 (en
Inventor
Manfred Knabel
Erich Bock
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 EP0794273A1 publication Critical patent/EP0794273A1/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 object of the present application is to design an open-end spinning device of the type mentioned at the outset in such a way that the wear is reduced further, although the cost is said to be very low to insignificant. This object is achieved with an open-end spinning device according to the features of claim 1.
  • the formation of the bearing surface of the shaft from a carbide ensures that the wear on the axial bearing, ie the wear of the bearing plate, is significantly reduced.
  • a carbon material together with a carbide offers a particularly advantageous, low-friction and low-wear material pairing.
  • the lifespan of an open-end spinning device with an aerostatic thrust bearing can be significantly extended by the inventive design.
  • the use of a boron carbide is particularly favorable since it has a very high hardness and causes little wear on the carbon material.
  • Silicon carbide can be used particularly advantageously as the material for the bearing surface of the shaft. Together with the carbon material of the bearing surface of the thrust bearing, this forms a particularly favorable, low-friction and low-wear pairing of materials even under load.
  • the material pairing can be formed independently of the material of the rotor shaft.
  • the embodiment is particularly cost-effective if, according to a further advantageous embodiment, the bearing surface of the rotor shaft is coated with a carbide.
  • the design of the bearing surface of the shaft is particularly favorable if it consists of a flat ground surface that is coated. It is thereby achieved that the coating can be applied very thinly and at the same time it is ensured that the geometric conditions in the axial bearing are favorable. It is particularly advantageous if the bearing surface of the shaft is coated with a carbide which is embedded in a metal matrix, in particular a nickel matrix.
  • the shaft end can be designed with a carbide tread in a simple and inexpensive manner. It has been shown that it is sufficient for a substantial improvement in the life of the thrust bearing if the running surface is coated in this way. It is obviously not necessary for the entire tread consists of carbide. It is particularly advantageous if a sufficient amount of carbide in the coating bath ensures that the bearing surface of the rotor shaft consists of carbide at least 20% of its running surface. This proportion is already sufficient to achieve significant improvements in the service life of the thrust bearing.
  • the storage area advantageously consists of 25% to 50% carbide. It is particularly favorable if the coating contains silicon carbide.
  • the rest of the shaft can also be coated in one operation, so that the remaining areas of the shaft are wear-resistant without additional costs.
  • a grain size of the carbide grains of the coating between 2 ⁇ m and 6 ⁇ m can be integrated particularly well into the metal matrix and at the same time gives good running properties.
  • the coating has favorable mechanical properties with a thickness between 10 ⁇ m and 30 ⁇ m.
  • an open-end spinning device designed according to the invention is shown in section.
  • the main components are the spinning rotor 1 with its shaft 11 and the rotor plate 12, the rotor housing 2 with the rotor housing seal 21, the bearing block 3 with a receptacle 31 for the axial bearing 6 and a receptacle 32 for the support of the support disks 4, and the support disks 4 itself, for receiving the rotor shaft 11.
  • the drive means 5, a tangential belt, and the axial bearing 6 for the axial support of the rotor shaft 11 are shown.
  • the rotor shaft 11 extends with its end carrying the rotor plate 12 into the rotor housing 2 through the bore of the rotor housing seal 21.
  • the axial bearing 6 is arranged in an adjusting screw 61 and is opposite the free end 111 of the rotor shaft 11.
  • the receptacle 31 has a bore with a thread into which the set screw is screwed in an axially adjustable manner.
  • a lock nut is used for fixation.
  • the connection 62 for supplying the compressed air to the thrust bearing 6 is arranged.
  • the bearing gap 630 extends between this and the shaft end 111.
  • the axial force on the rotor or rotor shaft is applied by support disks 4 which are tilted in a known manner.
  • the axial force component e.g. by means of a drive belt running at an angle to the rotor shaft or also by means of an inclined pressure or drive pulley.
  • the open-end spinning device is attached to the receptacle 33, which is part of the associated spinning machine.
  • FIG. 2a shows a set screw 61 and a bearing plate 63 of an aerostatic axial bearing 6 arranged therein.
  • the bearing plate 63 has a plurality of bores 7 for the air to escape into the bearing gap.
  • a throttle device 8, which consists of a sintered material, is connected upstream of the bores, as a result of which the bearing receives a high degree of rigidity because the short air columns in the holes are hardly compressible.
  • Figure 2b shows the bearing plate 63 of Figure 2a in plan view.
  • the holes 7 are evenly distributed on a circular line at a distance from the center.
  • the bearing plate 63 is made of a carbon material, e.g. Coal graphite.
  • the bearing plate can also consist of a carbonized or graphitized carbon as well as a synthetic resin-bonded carbon graphite material.
  • FIG. 3 shows a shaft end 111 designed according to the invention, which works together with the bearing plate of the axial bearing.
  • the shaft end 111 has a flat ground surface 115 which is coated with a carbide material. This can e.g. Boron carbide or silicon carbide.
  • the shaft end 111 has a slightly smaller diameter in the area of the surfaces 115 than the rest of the shaft, as a result of which the rotor shaft can be pushed more easily into the wedge gap of the support disks when the rotor is inserted into the open-end spinning device.
  • FIG. 4 shows the free end 111 of a rotor shaft designed according to the invention, in which the rotor shaft carries an extension 113, which consists of a carbide material.
  • a carbide material e.g. Boron carbide or silicon carbide.
  • the approach 113 is connected via suitable connecting means, e.g. an adhesive is inserted into the appropriately prepared end of the rotor shaft and fastened.
  • the bearing surface 115 like the bearing surface 115 consisting of a coating, from FIG. 3, is of flat design and is designed with a low roughness depth. Together with the carbide material, this ensures that there is very little wear on the bearing plate.
  • an attachment shown in FIG. 4 it can also be connected to the shaft without a positive fit. That e.g. in that the approach is applied with a flat surface on the surface of the rotor shaft end which is also designed.
  • the attachment can take place, for example, by means of an adhesive.
  • FIG. 5 shows a section through the free end of a rotor shaft configured according to the invention, the bearing surface 115 of which consists of carbide crystals 7, which are in a metallic matrix 71, which here advantageously consists of nickel, are stored.
  • the entire bearing surface 115 consists of carbide, it has been shown that it is already possible with such a coating to realize the favorable running properties between a carbide material and a bearing plate 63 made of carbon material. It has been shown that even with an area share of 20% of the carbide in the total storage area 115, this is sufficient.
  • This type of embodiment of the open-end spinning device according to the invention also has the advantage that not only the bearing surface 115 of the rotor shaft 11 can be coated with, for example, silicon carbide, but also advantageously the rest of the surface of the rotor shaft in one operation, so that it can be coated Protect against wear with silicon carbide. This wear occurs, for example, in the area of the tangential belt 5, in the area of the support disks 4 or in the area of a brake (not shown).

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

Abstract

An open-end spinning apparatus has a rotor mounted via its shaft on support discs on which an axial force is exerted, buttressed by an aerostatic axial bearing (6) with an active surface consisting of a carbon material. The surface of the shaft (11) which works in conjunction with the axial bearing is made at least partially from a carbide. Preferably the carbide is boron or silicon carbide and is applied as an extension to the shaft or as a layer, the bearing surface being ground flat.

Description

Aus der DE-A 39 42 612 ist eine Offenend-Spinnvorrichtung bekannt, bei der ein Spinnrotor über seinen Schaft durch Stützscheiben gelagert ist und auf den eine axial wirkende Kraft ausgeübt wird, wobei die axiale Abstützung des Rotorschaftes über ein aerostatisches Axiallager erfolgt. Dieses aerostatische Axiallager besitzt eine Lagerplatte, mit der das Schaftende zusammenarbeitet. Der Luftaustritt erfolgt aus der Lagerplatte und bildet ein Luftpolster zwischen dem Rotorschaft und der Lagerplatte. Diese ergibt zusammen mit dem Ende des Rotorschaftes durch geeignete Werkstoffe eine reibungsarme Werkstoffpaarung. Dies z.B. mittels einer Lagerplatte aus einem Kohlenstoffwerkstoff, die mit einem Rotorschaft aus Stahl zusammenarbeitet, dessen Lagerfläche plan geschliffen ist und eine geringe Rauhtiefe aufweist. Unter einem Kohlenstoffwerkstoff wird dabei im wesentlichen Kohlegrafit verstanden, daneben sind aber auch andere geeignete Kohlenstoffwerkstoffe mit entsprechenden mechanischen Eigenschaften denkbar.From DE-A 39 42 612 an open-end spinning device is known, in which a spinning rotor is supported over its shaft by means of support disks and on which an axially acting force is exerted, the axial support of the rotor shaft taking place via an aerostatic axial bearing. This aerostatic thrust bearing has a bearing plate with which the shaft end works. The air exits from the bearing plate and forms an air cushion between the rotor shaft and the bearing plate. Together with the end of the rotor shaft, this results in a low-friction material pairing using suitable materials. This e.g. by means of a bearing plate made of a carbon material, which works together with a rotor shaft made of steel, the bearing surface of which is ground flat and has a low roughness depth. A carbon material is essentially understood to mean carbon graphite, but other suitable carbon materials with corresponding mechanical properties are also conceivable.

Im Normalbetrieb erfolgt zwischen Rotorschaft und Lagerplatte keine Berührung, so daß an sich ein verschleißfreies Axiallager vorliegt. Beim Betrieb von Offenend-Spinnrotoren treten jedoch zeitweise derart rauhe Betriebsbedingungen auf, z.B. durch Unwucht im Spinnrotor, daß eine Berührung zwischen dem Schaftende und der Lagerplatte des aerostatischen Axiallagers erfolgt. Diese Berührung bedeutet zwar keineswegs, daß das aerostatische Lager beschädigt wird, da es bei der bekannten Offenend-Spinnvorrichtung mit einer reibungsarmen Werkstoffpaarung ausgestattet ist. Gleichwohl bewirkt jede Berührung zwischen Rotorschaft und der Lagerplatte des Axiallagers einen geringen Verschleiß am Axiallager, der letztlich eine Begrenzung der Lebensdauer zur Folge hat.In normal operation there is no contact between the rotor shaft and the bearing plate, so that there is a wear-free axial bearing. When operating open-end spinning rotors, however, occasionally such rough operating conditions occur, for example due to imbalance in the spinning rotor, that there is contact between the shaft end and the bearing plate of the aerostatic axial bearing. This contact does not mean that the aerostatic bearing is damaged, since it is equipped with a low-friction material pairing in the known open-end spinning device. Nevertheless, any contact between the rotor shaft and the bearing plate of the thrust bearing causes little wear on the thrust bearing, which ultimately results in a limitation of the service life.

Aufgabe der vorliegenden Anmeldung ist es, eine Offenend-Spinnvorrichtung der Eingangs genannten Art derart auszubilden, daß der Verschleiß weiter verringert wird, wobei trotzdem der Kostenaufwand sehr niedrig bis unbedeutend sein soll. Diese Aufgabe wird erfindungsgemäß mit einer Offenend-Spinnvorrichtung gemäß den Merkmalen des Patentanspruches 1 gelöst.The object of the present application is to design an open-end spinning device of the type mentioned at the outset in such a way that the wear is reduced further, although the cost is said to be very low to insignificant. This object is achieved with an open-end spinning device according to the features of claim 1.

Durch die Ausbildung der Lagerfläche des Schaftes aus einem Karbid wird erreicht, daß der Verschleiß am Axiallager, d.h. der Verschleiß der Lagerplatte wesentlich verringert wird. Ein Kohlenstoffwerkstoff bietet zusammen mit einem Karbid eine besonders vorteilhafte, reibungsarme und verschleißarme Werkstoffpaarung. Die Lebensdauer einer Offenend-Spinnvorrichtung mit einem aerostatischen Axiallager kann durch die erfindungsgemäße Ausbildung wesentlich verlängert werden. Besonders günstig ist die Verwendung eines Borkarbids, da dies eine sehr hohe Härte aufweist und einen geringen Verschleiß des Kohlenstoffwerkstoffs bewirkt. Besonders günstig ist als Werkstoff für die Lagerfläche des Schaftes Siliziumkarbid einsetzbar. Dies bildet zusammen mit dem Kohlenstoffwerkstoff der Lagerfläche des Axiallagers eine besonders günstige, reibungsarme und auch bei Belastung besonders verschleißarme Werkstoffpaarung. Durch die Anordnung eines Ansatzes am Ende des Rotorschaftes, der aus einem Karbid besteht, kann die Werkstoffpaarung unabhängig vom Werkstoff des Rotorschaftes ausgebildet werden. Besonders kostengünstig ist die Ausführung, wenn gemäß weiterer vorteilhaften Ausgestaltung die Lagerfläche des Rotorschaftes mit einem Karbid beschichtet ist. Besonders günstig ist die Ausbildung der Lagerfläche des Schaftes, wenn sie aus einer plan geschliffenen Fläche besteht, die beschichtet ist. Dadurch wird erreicht, daß die Beschichtung sehr dünn aufgebracht werden kann und gleichzeitig ist gewährleistet, daß die geometrischen Verhältnisse im Axiallager günstig sind. Besonders vorteilhaft ist es, wenn die Lagerfläche des Schaftes mit einem Karbid beschichtet wird, das in einer Metallmatrix, insbesondere einer Nickelmatrix eingelagert ist. Dadurch wird erreicht, daß auf einfache und kostengünstige Art und Weise das Schaftende mit einer Karbid-Lauffläche ausgestaltet werden kann. Es hat sich gezeigt, daß es für eine wesentliche Verbesserung der Lebensdauer des Axiallagers genügt, wenn die Lauffläche derart beschichtet ist. Es ist offensichtlich nicht erforderlich, daß die gesamte Lauffläche aus Karbid besteht. Besonders vorteilhaft ist es dabei, wenn durch einen genügenden Karbidanteil im Beschichtungsbad dafür gesorgt wird, daß die Lagerfläche des Rotorschaftes wenigstens zu 20% ihrer Lauffläche aus Karbid besteht. Dieser Anteil genügt bereits, um wesentliche Verbesserungen der Standzeiten des Axiallagers zu erreichen. Vorteilhaft besteht die Lagerfläche zu 25% bis 50% aus Karbid. Besonders günstig ist es, wenn die Beschichtung Siliziumkarbid enthält. Vorteilhafterweise kann in einem Arbeitsgang auch zusätzlich der restliche Schaft mit beschichtet werden, so daß die übrigen Bereiche des Schaftes verschleißfest sind, ohne daß zusätzliche Kosten entstehen. Eine Korngröße der Karbidkörner der Beschichtung zwischen 2 µm und 6 µm läßt sich besonders gut in die Metallmatrix integrieren und ergibt zugleich gute Laufeigenschaften. Günstige mechanische Eigenschaften hat die Beschichtung bei einer Dicke zwischen 10 µm und 30 µm.The formation of the bearing surface of the shaft from a carbide ensures that the wear on the axial bearing, ie the wear of the bearing plate, is significantly reduced. A carbon material together with a carbide offers a particularly advantageous, low-friction and low-wear material pairing. The lifespan of an open-end spinning device with an aerostatic thrust bearing can be significantly extended by the inventive design. The use of a boron carbide is particularly favorable since it has a very high hardness and causes little wear on the carbon material. Silicon carbide can be used particularly advantageously as the material for the bearing surface of the shaft. Together with the carbon material of the bearing surface of the thrust bearing, this forms a particularly favorable, low-friction and low-wear pairing of materials even under load. By arranging a shoulder at the end of the rotor shaft, which consists of a carbide, the material pairing can be formed independently of the material of the rotor shaft. The embodiment is particularly cost-effective if, according to a further advantageous embodiment, the bearing surface of the rotor shaft is coated with a carbide. The design of the bearing surface of the shaft is particularly favorable if it consists of a flat ground surface that is coated. It is thereby achieved that the coating can be applied very thinly and at the same time it is ensured that the geometric conditions in the axial bearing are favorable. It is particularly advantageous if the bearing surface of the shaft is coated with a carbide which is embedded in a metal matrix, in particular a nickel matrix. This ensures that the shaft end can be designed with a carbide tread in a simple and inexpensive manner. It has been shown that it is sufficient for a substantial improvement in the life of the thrust bearing if the running surface is coated in this way. It is obviously not necessary for the entire tread consists of carbide. It is particularly advantageous if a sufficient amount of carbide in the coating bath ensures that the bearing surface of the rotor shaft consists of carbide at least 20% of its running surface. This proportion is already sufficient to achieve significant improvements in the service life of the thrust bearing. The storage area advantageously consists of 25% to 50% carbide. It is particularly favorable if the coating contains silicon carbide. Advantageously, the rest of the shaft can also be coated in one operation, so that the remaining areas of the shaft are wear-resistant without additional costs. A grain size of the carbide grains of the coating between 2 µm and 6 µm can be integrated particularly well into the metal matrix and at the same time gives good running properties. The coating has favorable mechanical properties with a thickness between 10 µm and 30 µm.

Im folgenden wird die Erfindung anhand zeichnerischer Darstellungen näher erläutert.The invention is explained in more detail below with the aid of drawings.

Es zeigen:

Figur 1
eine erfindungsgemäße Offenend-Spinnvorrichtung im Schnitt;
Figur 2a
einen Schnitt durch das Axiallager;
Figur 2b
eine Draufsicht auf die Lagerplatte des Axiallagers;
Figur 3
das freie Ende eines Rotorschaftes;
Figur 4
einen Rotorschaft mit einem Ansatz;
Figur 5
einen Schnitt durch die Lagerfläche des Rotorschaftes mit einer Beschichtung aus Karbidkörnern, die in Nickel eingelagert sind.
Show it:
Figure 1
an open-end spinning device according to the invention in section;
Figure 2a
a section through the thrust bearing;
Figure 2b
a plan view of the bearing plate of the thrust bearing;
Figure 3
the free end of a rotor shaft;
Figure 4
a rotor shaft with a shoulder;
Figure 5
a section through the bearing surface of the rotor shaft with a coating of carbide grains, which are embedded in nickel.

In Figur 1 ist eine erfindungsgemäß ausgestaltete Offenend-Spinnvorrichtung im Schnitt gezeigt. Die wesentlichen Bestandteile sind der Spinnrotor 1 mit seinem Schaft 11 und dem Rotorteller 12, das Rotorgehäuse 2 mit der Rotorgehäuseabdichtung 21, der Lagerbock 3 mit einer Aufnahme 31 für das Axiallager 6 und einer Aufnahme 32 für die Lagerung der Stützscheiben 4, sowie die Stützscheiben 4 selbst, zur Aufnahme des Rotorschaftes 11. Ferner sind das Antriebsmittel 5, ein Tangentialriemen, und das Axiallager 6 zur axialen Abstützung des Rotorschaftes 11 dargestellt. Der Rotorschaft 11 reicht mit seinem den Rotorteller 12 tragenden Ende in das Rotorgehäuse 2 durch die Bohrung der Rotorgehäusedichtung 21 hindurch. Das Axiallager 6 ist in einer Stellschraube 61 angeordnet und liegt dem freien Ende 111 des Rotorschaftes 11 gegenüber. Die Aufnahme 31 besitzt eine Bohrung mit einem Gewinde, in das die Stellschraube axial einjustierbar eingeschraubt ist. Zur Fixierung dient eine Kontermutter. Am anderen Ende der Stellschraube 61 ist der Anschluß 62 für die Zuführung der Druckluft zum Axiallager 6 angeordnet. Zwischen diesem und dem Schaftende 111 erstreckt sich der Lagerspalt 630. Auf Spinnrotoren von gattungsgemäßen Offenend-Spinnvorrichtungen wird in bekannter Weise eine axiale Kraft aufgebracht, die sich über das freie Ende 111 des Rotorschaftes 11 abstützt. Die axiale Kraft auf den Rotor bzw. Rotorschaft wird bei der in Figur 1 gezeigten Offenend-Spinnvorrichtung durch in bekannter Weise schief gestellte Stützscheiben 4 aufgebracht. Ebensogut ist es aber auch möglich, die axiale Kraftkomponente, z.B. über einen schräg zum Rotorschaft verlaufenden Antriebsriemen oder auch eine schräg gestellte Andrück- oder Treibscheibe, aufzubringen. Die Offenend-Spinnvorrichtung ist auf der Aufnahme 33, die Teil der dazugehörigen Spinnmaschine ist, befestigt.In Figure 1, an open-end spinning device designed according to the invention is shown in section. The main components are the spinning rotor 1 with its shaft 11 and the rotor plate 12, the rotor housing 2 with the rotor housing seal 21, the bearing block 3 with a receptacle 31 for the axial bearing 6 and a receptacle 32 for the support of the support disks 4, and the support disks 4 itself, for receiving the rotor shaft 11. Furthermore, the drive means 5, a tangential belt, and the axial bearing 6 for the axial support of the rotor shaft 11 are shown. The rotor shaft 11 extends with its end carrying the rotor plate 12 into the rotor housing 2 through the bore of the rotor housing seal 21. The axial bearing 6 is arranged in an adjusting screw 61 and is opposite the free end 111 of the rotor shaft 11. The receptacle 31 has a bore with a thread into which the set screw is screwed in an axially adjustable manner. A lock nut is used for fixation. At the other end of the adjusting screw 61, the connection 62 for supplying the compressed air to the thrust bearing 6 is arranged. The bearing gap 630 extends between this and the shaft end 111. An axial force is applied in a known manner to spinning rotors of generic open-end spinning devices which is supported via the free end 111 of the rotor shaft 11. In the open-end spinning device shown in FIG. 1, the axial force on the rotor or rotor shaft is applied by support disks 4 which are tilted in a known manner. However, it is equally possible to use the axial force component, e.g. by means of a drive belt running at an angle to the rotor shaft or also by means of an inclined pressure or drive pulley. The open-end spinning device is attached to the receptacle 33, which is part of the associated spinning machine.

Figur 2a zeigt eine Stellschraube 61 und eine darin angeordnete Lagerplatte 63 eines aerostatischen Axiallagers 6. Zum Austritt der Luft in den Lagerspalt besitzt die Lagerplatte 63 mehrere Bohrungen 7. Eine Drosselvorrichtung 8, die aus einem Sinterwerkstoff besteht, ist den Bohrungen vorgeschaltet, wodurch das Lager eine hohe Steifigkeit erhält, da die kurzen Luftsäulen in den Bohrungen kaum kompressibel sind.FIG. 2a shows a set screw 61 and a bearing plate 63 of an aerostatic axial bearing 6 arranged therein. The bearing plate 63 has a plurality of bores 7 for the air to escape into the bearing gap. A throttle device 8, which consists of a sintered material, is connected upstream of the bores, as a result of which the bearing receives a high degree of rigidity because the short air columns in the holes are hardly compressible.

Figur 2b zeigt die Lagerplatte 63 von Figur 2a in der Draufsicht. Die Bohrungen 7 sind auf einer Kreislinie mit Abstand zum Mittelpunkt gleichmäßig verteilt angeordnet. Die Lagerplatte 63 besteht aus einem Kohlenstoffwerkstoff, wie z.B. Kohlegraphit. Beispielsweise kann die Lagerplatte auch aus einem verkokten oder graphitierten Kohlenstoff bestehen sowie aus einem kunstharzgebundenen Kohlegrafit-Werkstoff.Figure 2b shows the bearing plate 63 of Figure 2a in plan view. The holes 7 are evenly distributed on a circular line at a distance from the center. The bearing plate 63 is made of a carbon material, e.g. Coal graphite. For example, the bearing plate can also consist of a carbonized or graphitized carbon as well as a synthetic resin-bonded carbon graphite material.

Figur 3 zeigt ein erfindungsgemäß ausgebildetes Schaftende 111, das mit der Lagerplatte des Axiallagers zusammenarbeitet. Das Schaftende 111 besitzt eine plan geschliffene Fläche 115, die mit einem Karbidwerkstoff beschichtet ist. Dies kann z.B. Borkarbid oder Siliziumkarbid sein. Für das leichtere Austauschen des Spinnrotors besitzt das Schaftende 111 im Bereich der Flächen 115 einen etwas geringeren Durchmesser als der übrige Schaft, wodurch der Rotorschaft beim Einsetzen des Rotors in die Offenend-Spinnvorrichtung leichter in den Keilspalt der Stützscheiben hineingeschoben werden kann.FIG. 3 shows a shaft end 111 designed according to the invention, which works together with the bearing plate of the axial bearing. The shaft end 111 has a flat ground surface 115 which is coated with a carbide material. This can e.g. Boron carbide or silicon carbide. For easier replacement of the spinning rotor, the shaft end 111 has a slightly smaller diameter in the area of the surfaces 115 than the rest of the shaft, as a result of which the rotor shaft can be pushed more easily into the wedge gap of the support disks when the rotor is inserted into the open-end spinning device.

Figur 4 zeigt das freie Ende 111 eines erfindungsgemäß ausgestalteten Rotorschaftes bei dem dieses einen Ansatz 113 trägt, der aus einem Karbidwerkstoff besteht. Dies kann z.B. Borkarbid oder Siliziumkarbid sein. Der Ansatz 113 ist über geeignete Verbindungsmittel, z.B. einen Klebstoff in das entsprechend vorbereitete Ende des Rotorschaftes eingefügt und befestigt. Die Lagerfläche 115 ist ebenso wie die aus einer Beschichtung bestehenden Lagerfläche 115, von Figur 3, plan ausgebildet und mit einer geringen Rauhtiefe ausgestaltet. Dies gewährleistet zusammen mit dem Karbidwerkstoff, daß nur ein sehr geringer Verschleiß an der Lagerplatte erfolgt. Neben dem in Figur 4 gezeigten Ausführungsbeispiel eines Ansatzes kann dieser auch ohne Formschluß mit dem Schaft verbunden sein. Das z.B. dadurch, daß der Ansatz mit einer ebenen Fläche auf der ebenso gestalteten Fläche des Rotorschaftendes aufgebracht ist. Die Befestigung kann dabei beispielsweise mittels eines Klebstoffs erfolgen.FIG. 4 shows the free end 111 of a rotor shaft designed according to the invention, in which the rotor shaft carries an extension 113, which consists of a carbide material. This can e.g. Boron carbide or silicon carbide. The approach 113 is connected via suitable connecting means, e.g. an adhesive is inserted into the appropriately prepared end of the rotor shaft and fastened. The bearing surface 115, like the bearing surface 115 consisting of a coating, from FIG. 3, is of flat design and is designed with a low roughness depth. Together with the carbide material, this ensures that there is very little wear on the bearing plate. In addition to the embodiment of an attachment shown in FIG. 4, it can also be connected to the shaft without a positive fit. That e.g. in that the approach is applied with a flat surface on the surface of the rotor shaft end which is also designed. The attachment can take place, for example, by means of an adhesive.

Figur 5 zeigt einen Schnitt durch das freie Ende eines erfindungsgemäß ausgestalteten Rotorschaftes, dessen Lagerfläche 115 aus Karbidkristallen 7 besteht, die in einer metallischen Matrix 71, die hier vorteilhaft aus Nickel besteht, eingelagert sind. Obwohl hier nicht die gesamte Lagerfläche 115 aus Karbid besteht, so hat sich doch gezeigt, daß es bereits mit einer derartigen Beschichtung möglich ist, die günstigen Laufeigenschaften zwischen einem Karbidwerkstoff und einer Lagerplatte 63 aus Kohlenstoffwerkstoff zu realisieren. Es hat sich gezeigt, daß bereits bei einem Flächenanteil von 20% des Karbids an der gesamten Lagerfläche 115 dafür ausreichend ist. Diese Art der erfindungsgemäßen Ausbildung der Offenend-Spinnvorrichtung hat darüber hinaus den Vorteil, daß nicht nur die Lagerfläche 115 des Rotorschaftes 11 mit z.B. Siliziumkarbid beschichtet werden kann, sondern darüber hinaus in einem Arbeitsgang vorteilhafterweise auch die übrige Oberfläche des Rotorschaftes, um diesen durch die Beschichtung mit Siliziumkarbid vor Verschleiß zu schützen. Dieser Verschleiß tritt z.B. im Bereich des Tangentialriemens 5, im Bereich der Stützscheiben 4 oder auch im Bereich einer nicht gezeigten Bremse auf.FIG. 5 shows a section through the free end of a rotor shaft configured according to the invention, the bearing surface 115 of which consists of carbide crystals 7, which are in a metallic matrix 71, which here advantageously consists of nickel, are stored. Although not the entire bearing surface 115 consists of carbide, it has been shown that it is already possible with such a coating to realize the favorable running properties between a carbide material and a bearing plate 63 made of carbon material. It has been shown that even with an area share of 20% of the carbide in the total storage area 115, this is sufficient. This type of embodiment of the open-end spinning device according to the invention also has the advantage that not only the bearing surface 115 of the rotor shaft 11 can be coated with, for example, silicon carbide, but also advantageously the rest of the surface of the rotor shaft in one operation, so that it can be coated Protect against wear with silicon carbide. This wear occurs, for example, in the area of the tangential belt 5, in the area of the support disks 4 or in the area of a brake (not shown).

Claims (14)

Offenend-Spinnvorrichtung mit einem Spinnrotor, der über seinen Schaft durch Stützscheiben gelagert ist, auf den eine axial wirkende Kraft ausgeübt wird, die sich über den Schaft an einem aerostatischen Axiallager abstützt, wobei die Lagerfläche des Axiallagers aus einem Kohlenstoffwerkstoff besteht, dadurch gekennzeichnet, daß die mit dem Axiallager (6) zusammenwirkende Lagerfläche (115) des Schaftes (11) wenigstens teilweise aus einem Karbid besteht.Open-end spinning device with a spinning rotor, which is supported over its shaft by support disks, on which an axially acting force is exerted, which is supported via the shaft on an aerostatic axial bearing, the bearing surface of the axial bearing consisting of a carbon material, characterized in that the bearing surface (115) of the shaft (11) cooperating with the axial bearing (6) consists at least partially of a carbide. Offenend-Spinnvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Karbid Borkarbid ist.Open-end spinning device according to claim 1, characterized in that the carbide is boron carbide. Offenend-Spinnvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Karbid Siliziumkarbid ist.Open-end spinning device according to claim 1, characterized in that the carbide is silicon carbide. Offenend-Spinnvorrichtung nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Karbid in Form eines Ansatzes (113) am Schaft (11) angebracht ist.Open-end spinning device according to one or more of claims 1 to 3, characterized in that the carbide is attached to the shaft (11) in the form of an extension (113). Offenend-Spinnvorrichtung nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Lagerfläche (115) des Schaftes (11) mit einem Karbid beschichtet ist.Open-end spinning device according to one or more of claims 1 to 3, characterized in that the bearing surface (115) of the shaft (11) is coated with a carbide. Offenend-Spinnvorrichtung nach einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Lagerfläche (115) des Schaftes (11) eine plan geschliffene Fläche ist, die beschichtet ist.Open-end spinning device according to one or more of claims 1 to 5, characterized in that the bearing surface (115) of the shaft (11) is a flat ground surface which is coated. Offenend-Spinnvorrichtung nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß die Beschichtung aus einem Karbid besteht, das in eine Metallmatrix eingelagert ist.Open-end spinning device according to claim 5 or 6, characterized in that the coating consists of a carbide which is embedded in a metal matrix. Offenend-Spinnvorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß die Metallmatrix eine Nickelmatrix ist.Open-end spinning device according to claim 7, characterized in that the metal matrix is a nickel matrix. Offenend-Spinnvorrichtung nach einem oder mehreren der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Oberfläche der Lagerfläche (115) des Rotorschaftes (11) wenigstens zu 20% aus Karbid besteht.Open-end spinning device according to one or more of claims 1 to 8, characterized in that the surface of the bearing surface (115) of the rotor shaft (11) consists of at least 20% carbide. Offenend-Spinnvorrichtung nach einem oder mehreren der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Lagerfläche (115) des Rotorschaftes (11) zwischen 25% und 50% aus Karbid besteht.Open-end spinning device according to one or more of claims 1 to 9, characterized in that the bearing surface (115) of the rotor shaft (11) consists of between 25% and 50% carbide. Offenend-Spinnvorrichtung nach einem oder mehreren der Ansprüche 5 bis 10, dadurch gekennzeichnet, daß das Karbid eine Korngröße von 2 mm bis 6 mm besitzt.Open-end spinning device according to one or more of claims 5 to 10, characterized in that the carbide has a grain size of 2 mm to 6 mm. Offenend-Spinnvorrichtung nach einem oder mehreren der Ansprüche 5 bis 11, dadurch gekennzeichnet, daß die Beschichtung eine Dicke zwichen 10 µm und 30 µm hat.Open-end spinning device according to one or more of claims 5 to 11, characterized in that the coating has a thickness between 10 µm and 30 µm. Offenend-Spinnvorrichtung nach einem oder mehreren der Ansprüche 5 bis 12, dadurch gekennzeichnet, daß das Karbid Siliziumkarbid ist.Open-end spinning device according to one or more of claims 5 to 12, characterized in that the carbide is silicon carbide. Offenend-Spinnvorrichtung nach einem oder mehreren der Ansprüche 5 bis 13, dadurch gekennzeichnet, daß die übrige Oberfläche des Rotorschaftes (11), wenigstens teilweise, ebenfalls mit einem Karbid beschichtet ist.Open-end spinning device according to one or more of claims 5 to 13, characterized in that the remaining surface of the rotor shaft (11) is also, at least partially, coated with a carbide.
EP97102380A 1996-03-05 1997-02-14 Open-end spinning device Expired - Lifetime EP0794273B1 (en)

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DE19608272 1996-03-05
DE19608272 1996-03-05

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EP (1) EP0794273B1 (en)
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DE (2) DE19705607A1 (en)
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Publication number Priority date Publication date Assignee Title
EP1316629A1 (en) * 2001-11-29 2003-06-04 Rieter Ingolstadt Spinnereimaschinenbau AG Support disk and bearing for a spinning rotor

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Publication number Priority date Publication date Assignee Title
DE10014861A1 (en) * 1999-10-26 2001-05-03 Rieter Ingolstadt Spinnerei Bearing for an open-end spinning rotor
US6401444B1 (en) 1999-10-26 2002-06-11 Rieter Ingolstadt Spinnereimaschinenbau Ag Bearing composition for a open-end spin rotor
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.
DE10055443A1 (en) * 2000-11-09 2002-05-29 Wacker Chemie Gmbh The rotor shaft, for the rotor of an open end spinner, has a dispersion layer coating at the radial and axial bearing surfaces containing silicon nitride
DE10106204A1 (en) * 2001-02-10 2002-08-14 Rieter Ingolstadt Spinnerei Open-end spinning device with an aerostatic radial bearing for a spinning rotor
DE10106726A1 (en) * 2001-02-14 2002-08-22 Rieter Ingolstadt Spinnerei Open-end spinning rotor with an attachable support cap
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
CN102501317A (en) * 2011-11-03 2012-06-20 山东瑞天工程器材有限公司 Concrete mixing carrier

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DE3117755A1 (en) * 1980-05-10 1982-02-11 Rolls-Royce Ltd., London GASKET FOR THE TURBINE ROTOR OF A GAS TURBINE ENGINE
DE3733079A1 (en) * 1986-09-30 1988-04-07 Ngk Spark Plug Co GAS BEARING BODY
DE3942612A1 (en) 1989-12-25 1991-06-27 Schubert & Salzer Maschinen OPEN-END SPIDER
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EP1316629A1 (en) * 2001-11-29 2003-06-04 Rieter Ingolstadt Spinnereimaschinenbau AG Support disk and bearing for a spinning rotor

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CZ57797A3 (en) 1997-09-17
CZ287255B6 (en) 2000-10-11
TW366370B (en) 1999-08-11
US5730532A (en) 1998-03-24
DE59700010D1 (en) 1998-09-17
EP0794273B1 (en) 1998-08-12
DE19705607A1 (en) 1997-09-11
SK27897A3 (en) 1997-10-08

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