Device and method for winding and twisting fibre material in ring spinning or ring twisting frames

Abstract

The invention relates to a device and to a method than can be applied by said device, which serve for winding and twisting in particular yarns in ring spinning and ring twisting frames. The solution provided makes use of arrangements of high-temperature superconducting magnetic bearings in order to prevent burning of the yarn, by the rotation of the permanent magnetic rotors arranged coaxially to the spindles (3), in the case of high speeds. Proceeding from the prior art, the object of the invention consists in providing a device and a method for winding and twisting fibrous material in ring spinning and ring twisting frames, by means of which the operating speed of the frames can be substantially increased, higher productivity during ring spinning can be achieved, and the outlay, in terms of time and material, for assembling and servicing the device can be reduced. This object is achieved in that at least two high-temperature superconducting stators (1), together with the thermally connected cooling devices thereof, are arranged in a contactless manner and in parallel with one another along the progression of the spindle row, and the magnetic field-generating rotors (2), oriented coaxially with respect to the spindle (3), are introduced in a magnetically levitating manner in the magnetic field of the continuous intermediate space, between the stators which are adjacent in each case.

Description

[0001] Device and method for winding and twisting fiber material in ring spinning or

[0002] Ring twisting machines

[0003] The invention relates to a device and a method applicable by means of this device, which are used for winding and twisting, in particular, yarns in ring spinning and ring twisting machines. The solution developed utilizes arrangements of high-temperature superconducting magnetic bearings to prevent yarn burns at high speeds caused by the rotation of the permanent-magnet rotors arranged coaxially to the spindles.

[0004] Ring spinning technology is the oldest form of fiber spinning and is still used today.

[0005] However, due to the high quality of the yarn and its flexibility, the ring spinning process is the dominant technique in yarn production. The ring spinning process is used worldwide and offers a number of advantages that are hardly comparable to other

[0006] Techniques can be replaced. The main advantages are:

[0007] (i) production of both fine and high tenacity yarns;

[0008] (ii) universal application to a wide variety of as well as very specific yarns;

[0009] (iii) Ring spinning is flexible in terms of quantities, yarn quality and uniformity;

[0010] Ring spinning can produce the widest range of yarn counts with the highest strength and quality. In contrast, ring spinning is slower than other modern spinning systems such as rotor, friction, jet, or vortex spinning and requires more processing steps. Production limitations and productivity are determined by the conventional ring rotor system, which, at higher speeds, causes mechanical friction combined with heating of the rotor or yarn guide. As a result, the yarn is burned, glows, and breaks.

[0011] Shortly after the discovery of high-temperature superconductors (HTS) in 1986 / 87, the combination of a permanent magnet (PM) with the new superconductors was proposed, demonstrating almost frictionless levitation and rotation. Later, the SMB technology for use in centrifuges was described in the literature as early as 2001 [4]. It was shown that the new type of magnetic bearing could achieve extremely high revolutions per minute (rpm) of over 10 5 The advantages and benefits of HTS magnetic bearings are useful for many applications, especially in high-tech solutions. Their virtually frictionless operation enables high speeds without lubrication, no wear, and no particle formation, even under harsh environmental conditions such as heat, cold, steam, vacuum, and aggressive chemicals.

[0012] At the same time, we learned to understand rotor dynamics with self-regulating unbalance compensation, overcoming critical speeds in high-speed operation and increasing rotor speeds, as well as the shift of superconducting magnetic bearings (SMB) into the load range of tons, as used in flywheel energy storage systems.

[0013] Initial experiments and applications of the SMB in ring spinning technology began in 2010 [3], [5]). Later, the Dresden group of Hussain, de Haas, and Schultz ([7] -

[0018] ) extensively investigated the significant advantages of replacing the conventional ring spinning method with a rotating SMB. The SMB design followed the coaxial PM ring-to-HTS ring design, which was integrated into a stainless steel vacuum cryostat. The experiments are described and analyzed in detail in the literature [8] -

[0018] . A disadvantage is the great effort required for the superconductor ring geometry.

[0014] Winding and ring-twisting devices for a ring spinning or ring-twisting machine are known from WO 2012 / 100964 A1 and WO 2017 / 178196 A1. In these devices, the friction between the ring and the rotor is eliminated by magnetic levitation, thereby reducing the frictional forces acting. A ring-shaped stator made of a superconducting material with a corresponding stator cooling device is used. In addition to the ring-shaped stator, a ring-shaped permanent-magnet rotor is used, which is rotatable relative to the stator and arranged coaxially around the spindle with an eyelet-shaped thread guide element. An annular axial gap is formed between the stator and the rotor. When the superconducting material of the stator is cooled below the critical temperature, the magnetic flux of the rotor is coupled into the cooled stator and magnetically trapped. This coupling makes the rotor inherently stable above or within the stator.The thread is guided from the outside around the rotor through the axial gap between the stator and rotor and wound onto the spool. The stator and rotor have specially rounded shapes to ensure that the thread does not encounter any edges that could impede its circulation in the gap. Before the HTS stator is magnetized and cooled, mechanical support ensures the optimized working position. The contactless bearing of the rotating rotor eliminates the classic ring-rotor system, which generates frictional heat and thus limits productivity. Advantageously, the entire rotor with the thread guide element is now set in rapid rotation. This rotation is essentially friction-free except for a slight magnetic friction, thus permitting significantly higher spindle speeds. However, the rotor, designed as a magnetic ring, has a considerable weight, which must also be accelerated when the spindle is started up.Furthermore, the freely suspended magnetic ring cannot be encapsulated, so the rotor, which runs at high speeds of approximately 20,000 to 30,000 revolutions per minute (rpm), poses a safety risk for the system operator. Finally, the thread guide element on the magnetic ring rotor represents an imbalance, which becomes increasingly problematic due to vibrations as the spindle speed increases.

[0015] The object of the invention is therefore to create a device and a method for winding and twisting fibrous material in ring spinning and ring twisting machines, with which the working speed of the machines can be significantly increased, higher productivity in ring spinning can be achieved and the time and material expenditure for assembly and servicing of the device can be reduced.

[0016] This object is achieved by the descriptive features of the device according to patent claim 1. Advantageous developments of the device are characterized by the features of patent claims 2 to 12. The created method is described by the features of patent claim 13. An efficient embodiment of the method is claimed by patent claim 14.

[0017] The solution according to the invention proposes a superconducting magnetic bearing (SMB) comprising a permanent magnet (PM) ring as a rotor, which levitates contactlessly but stably above a superconductor as a stator with cooling. The respective rotor is arranged coaxially to the associated spindle, and the thread to be wound is circulated in the gap between the rotor and stator. An efficient and variably adaptable design of the device is achieved by at least two high-temperature superconducting stators, together with their thermally connected cooling devices, being arranged contactlessly and parallel to each other along the course of the

[0018] The magnetic field generating rotors are arranged in a row of spindles, and the magnetic field generating rotors, aligned coaxially to the spindle, are magnetically suspended in the magnetic field of the continuous space between the adjacent stators. Further stabilization of the position in the magnetic bearing is achieved if the magnetic field generating rotors are equipped with ferromagnetic magnetic flux collectors, which serve to increase the field strength and guide the magnetic field towards the high-temperature superconductor. A cost reduction in the material expenditure is advantageously achieved if the high-temperature superconducting stators each consist of at least two HTS bulk elements, which are formed in sections separated from one another along the length of the stators and assigned to the respective magnetic field generating rotors.For simple and time-saving assembly, it is advantageous if the high-temperature superconducting stators are made of layered material and are designed in a strip- or cable-like configuration. A simple and material-saving device design is effectively achieved by forming the high-temperature superconducting stators from a thermally insulated tube-in-tube configuration, in which the inner "cold" tube connected to the HTS stator has a temperature below the superconducting critical temperature, and the outer tube adopts the ambient room temperature.The design of the device proves advantageous for the application of high operating speeds when the outer tube is made of a material with a high electrical conductivity suitable for generating eddy currents, thus providing additional magnetic stabilization during rotary spinning and twisting operations. Stable magnetic bearings for the rotors, while simultaneously maintaining low cost, are advantageously achieved by constructing the stators from a YBaCuO crystal of the composition Y1Ba2Cu3O. x (Y123) or a single crystal of the REBaCuO group with the composition RE1Ba2Cu3O x (RE-rare earths) and the superconductor of the bismuth family BiSrCaCuO.

[0019] The present invention achieves technical and economic improvements in machines through the use of new linear, superconducting HTS bulk stator arrangements. The device according to the invention allows for virtually frictionless high-speed operation of the rotors. This is achieved through the greatly simplified stator suspension and the possible simultaneous cooling of all stators involved.

[0020] The resulting solution paves the way for modular construction and collective cooling using liquid nitrogen (LN2). Furthermore, HTS material and machine costs are significantly reduced.

[0021] The invention will be explained in more detail below using an exemplary embodiment. The drawings show, for illustrative purposes,

[0022] Fig. 1 : the schematic comparison of the previous and the new magnetic bearings of the rotors,

[0023] Fig. 2: the perspective view of the magnetic bearing with three stators,

[0024] Fig. 3: the cross-sectional view of the magnetic bearing with three stators,

[0025] Fig. 4: the perspective view of the magnetic bearing with two stators,

[0026] Fig. 5: the cross-sectional view of the magnetic bearing with two stators, Fig. 6: the schematic internal structure of the stator,

[0027] Fig. 7: the principle representation of the additional stabilization of the rotor and

[0028] Fig. 8: the rotor surrounding bandage to compensate for dynamic forces.

[0029] Figure 1 schematically shows a comparison between conventional ring single-yarn twisting (a) and the HTS high-speed ring spinning process using a magnetically frictionless suspended winding ring and rotor construction (b). For this purpose, the spindles 3, together with the yarn wound into bobbins 5, are magnetically mounted between two parallel high-temperature superconductor stators 1. Both arrangements utilize ring-shaped, magnetically mounted rotors 2 that generate magnetic fields. The yarn to be wound is fed through the machine's feed system 16. The difference between the two solutions lies in the design of the magnetic bearing and the required cooling system for the high-temperature superconductor. Conventionally, the HTS magnetic bearing is arranged coaxially with each spindle 3, and the cooling system is elaborately adapted to each individual bearing.In the magnetic bearing according to the invention, however, the magnetic bearing is located between two adjacent HTS stators extending along the spindle row. The required cooling system is designed to easily enable simultaneous cooling of all stators.

[0030] The perspective view shown in Figure 2 shows the superconducting magnetic bearing with three stators 1. The rotors 2 are designed as permanent magnetic rings with integrated rotors (e.g., eyelets). The stators 1, equipped with high-temperature superconductors (HTS), run parallel to one another and along the spindle row. The rotors 2 are magnetically mounted in the space between any two adjacent stators 1. Furthermore, it is possible to arrange additional stators 1 in parallel if required. A smaller tube 8 with HTS superconductors arranged thereon is inserted inside the stators 1, designed as tubes 9. These superconducting materials 4 are applied in sections along the longitudinal extent of the tube 8 in such a way that they bring about the intended position of the respective rotor 2. The solution created is adapted in structure and design to conventional ring spinning machines.Due to its linear structure, this innovation follows traditional ring spinning machine design and eliminates the need for major ring spinning machine modifications when replacing conventional ring-traveler devices with superconducting magnetic bearings (SMB) in series. The system operates contactlessly and exhibits extremely low rotational friction. By freely suspending the rotor combination above the HTS stator 1 and rotating it at nearly spindle speed, the frictional heat of rotor 2 can be significantly eliminated, even when the rotor speed is further increased. Only a small friction force is generated between the yarn and the traveler during the dynamic process. The rotation generated by rotor 2 significantly reduces the yarn-traveler friction interaction, thus eliminating a large part of the heat source.The rotor 2 and the stator 1 are designed such that a circular air gap is formed between the rotor 2 and the stator 1, axially spaced and coaxial with the spindle 3. The thread is guided by the rotating rotor and can be wound onto the rotating spool body. In contrast to previous bearing solutions, in which adjacent spindles 3 run at room temperature in the passage of a cryostat, in the new solution the spindles 3 are not separated and have an open space along the row of spindles. This design enables joint LN2 cooling of a row of corresponding stators 1 with a large free space. Furthermore, this method makes it much easier to maintain or replace spindles 3 and spools.

[0031] Figure 3 shows the schematic cross-sectional structure of the magnetic bearing assembly formed by three stators 1. The arrangement of the inner tubes 8 within the respective outer tube 9 is clearly visible. The rotors 2 and their associated spindles 3 are magnetically suspended in the space between each two adjacent stators 1. Between the tubes (8; 9), all superconductors are simultaneously cooled using liquid nitrogen (LN2).

[0032] Figure 4 shows a perspective view of a magnetic bearing assembly consisting of two stators 1. In this design, the HTS superconductors 4 are also applied to the inner tube 8 in sections along the length of the stators 1 and positioned in such a way that they magnetically determine the position to be assumed by the spindles 3. Furthermore, the possibility of designing the HTS superconductor 4 in strip or cable form, which is applied to the inner tube 8 over the entire length of the stator 1 during assembly, is also provided. At the respective designated magnetic bearing points of the rotor 2, the HTS superconductor, which is usually constructed in layers, is adapted to the magnetic strengths to be generated during prefabrication.

[0033] A cross-sectional view of the magnetic bearing arrangement formed from two stators 1 can be seen in Figure 5. In addition to the bearing arrangements of the rotor 2 already described, the schematic representation also shows the cooling lines 15 leading into and out of the interior of the stators 1. The internal structural design of the stator 1 is shown in the illustration in Figure 6. The square outer tube 9 represents the vacuum chamber for the inner, also square, tube 8. The HTS superconductor 4 is glued to the inner cold tube 8. Liquid nitrogen is introduced into the inner tube 8 as a coolant. The inner tube 8, which is connected to the HTS superconductor 4, is mechanically fixed by spacer assemblies 10 made of glass fiber structures. These are designed such that they have a heat-conducting connection to the outer tube 9 only at the point-shaped supports 11, 12.This largely prevents a thermally conductive connection between the "cold" inner tube 8 and the outer tube 9, which is adapted to room temperature. Since the beams are made of a lightweight aluminum alloy, the design can be very compact and lightweight. Furthermore, the aluminum alloy material of the cryostat achieves a high thermal connection between the inner tube 8 and the HTS superconductor 4. However, the high thermal expansion coefficient of the aluminum alloy at room temperature must be taken into account when determining and fixing the precise longitudinal position of the superconducting stators 1 in the 4-5 m long support elements.

[0034] The basic representation of an additional stabilization of the position of the rotor 2 is shown in Figure 7. In addition to the levitation of the thread-guiding, ring-shaped rotor 2, innovative additional stabilization is achieved through electrical eddy currents 17 induced in the cryostat and the stators 1. The inner and outer tubes are made of an electrically conductive aluminum alloy. This causes the rotating rotor 2 to hover above a metallic aluminum sheet. Two effects can thus contribute to the stabilization of the rotating rotor 2. According to Lenz's law, the direction of any magnetic induction effect is such that it acts opposite to the cause of the effect. Thus, the direction of the magnetic force on the moving magnet is opposite to its movement. The induced current attempts to maintain the current status "quo" by counteracting the movement or a flux change.Above the stators 1, there is a lift force in the normal direction to the conducting plane and a drag force opposite to the direction of rotation. Accordingly, both forces contribute to additional holding and stabilization of the rotating rotor 2 during winding and twisting. Another embodiment is the generated braking force, which causes rapid deceleration of the rotating rotor 2 by changing the circumferential magnetization of the annular rotor 2. At low speeds, the drag force is proportional to the speed v = w / r and is greater than the lift force, which is proportional to v. 2 As the speed of rotor 2 increases, the drag force reaches a maximum and decreases with 1 / (v) 1 / 2 The lift force that stabilizes rotor 2, however, decreases at low speed with v 2and overtakes the drag force with increasing speed. The ratio of lift to drag forces is of great practical importance and is given by f L / f D = v / vi, where v and v, are the velocities of the magnetic dipole above the conducting sheet and the corresponding positive and negative image propagating downwards with the velocity v,.

[0035] The graphic in Figure 8 illustrates the basic behavior of the rotors 2 in high-speed ring spinning applications. In the inventive solution for high speeds, rotational friction and the dynamic effects of the magnetic bearings are of particular importance. In this area, the fundamental advantages of superconducting bearings over conventional bearings are significant. The superconducting passive-magnetic bearings exhibit significantly lower friction than conventional rolling bearings, by at least a factor of four decades. Even compared to pressurized air bearings, the friction of the passive-magnetic HTS bearings is in the per mille range and is thus exceptionally low. This extremely low friction is the physical basis for the innovative ring spinning technology, even at the highest spindle speeds.

[0036] Centrifugal forces are another critical aspect of ring rotor dynamics. The present invention focuses on rotation speeds of the permanent-magnet rotor 2 with the thread guide of up to 50,000 rpm. A rotor 2 measuring 60 cm x 40 cm x 1 cm, which serves as a twisting and rotating element, suffers from the enormous centrifugal forces that can destroy the working ring. In a first approach, the maximum tensile force or force density should be determined by the tangential vector at the inner radius r. i consider. σ t = ρ v 2 = rω 2 r 2

[0037] When the annular rotor 2 rotates, different centrifugal forces arise that can destroy the rotor 2. The highest mechanical forces occur at the inner radius of a rotating ring. The tensile strength of sintered NdFeB is approximately 80–90 MPa (12,000 psi). However, at a rotation speed of 50,000 rpm around the spindles, a PM ring made of NdFeB measuring 60 x 40 x 10 experiences a maximum tangential force density of -185 MPa, more than a factor of two of the material's intrinsic tensile strength. Accordingly, the dynamic forces must be balanced by an appropriate surrounding bandage 18 in the circumferential direction of the rotor 2. The bandage ring 18 should be made of materials with high tensile strength, either metallic such as non-magnetic stainless steel, high-strength Al or Mg alloys, or a non-metallic ring made of glass or carbon fiber compounds.In the best and optimal case, the safety ring reinforcement ensures pre-pressure on rotor 2 even at zero speed, preventing any cracks or defects in the NdFeB magnetic ring below nominal operating speeds. As a practical solution, a 3 mm thick safety ring made of Al alloy AL7075 was chosen and firmly bonded to rotor 2 by thermal shrink-fitting.

[0038] Reference symbol

[0039] 1 stator

[0040] 2 Rotor 3 Spindle

[0041] 4 HTS superconductors

[0042] 5 coil

[0043] 6 yarn

[0044] 7 Runner 8 Inner tube

[0045] 9 Outer tube

[0046] 10 spacer assembly

[0047] 11 point support

[0048] 12 point-shaped support 13 bandage

[0049] 14 Working gas N2

[0050] 15 cooling lines

[0051] 16 Feeding system

[0052] 17 Electric eddy current

[0053] 18 Bandage

[0054] Non-patent literature

[0055] [1] Landau, LD, Lifschitz E, M., Mechanics, Electrodynamics, Akademie-Verlag Berlin, 1973

[0056] [2] Smythe, W.R. “On Eddy Currents in a Rotating Disk,” Transactions 681, Vol. 61, 1942

[0057] [3J Zhigang Xia and Weilin Xu, A Review of Ring Stable Yarn Spinning Method Development and Its Trend Prediction, Journal of Natural Fibers, 10:1, 62-81.

[0058] Innovative twisting mechanism based on superconducting technology for higher productivity in ring spinning machines, Textile Research Journal, 84, (2014) 8, pp. 871-880.

[0059] [4] Werfel F et al. "Centrifuge advances using HTS magnetic bea rings", Physica C 354, pp. 13-17, 2001.

[0060] [5] Hussain M. (2010) Theoretical analysis of superconducting magnetic bearings and their suitability in the ring / trawler system in the ring spinning machine. Technical University (TU) Dresden,

[0061] Germany.

[0062] [6] Rahman M and Golam N, Recent Innovations in Yarn Technology: A Review, International Journal of Scientific and Research Publications, Volume 4, Issue 6, June 2014

[0063] ISSN 2250-3153.

[0064] [7J Hossain, M.; Abdkader, A.; Cherif, C.; Spa ring, M.; Berger, D.; Fuchs, G.; Schultz, L.

[0065] (See online at https: / / doi.org / 10.1177 / 0040517513512393)

[0066] Superconducting magnetic bearing as a twist element in textile machines, IEEE Transactions on

[0067] Applied Superconductivity, 25 (2015) 3, pp. 3600504 / 1-4.8] Sparing, M.; Hossain, M.; Berger, D.; Berger, A.; Abdkader, A.; Fox, G,; Cherif, C.; Schultz, L.

[0068] (Siehe online unter https: / / doi.org / 10.1109 / TASC.2014.2366001)C ryogeni c System for the Integration of a Ring-Shaped SMB in a Ring-Spinning Tester, IEEE Transactions on Applied Superconductivity, 26 (2016) 3, S. 3601105 / 1-5.

[0069] [8] Berger, A.; Hossain. M.; Sparing, M.; Berger, D.; Fuchs, G.; Abdkader, A.; Cherif, C.; Schultz, L (Siehe online unter https: / / doi.org / 10.1109 / TASC.2016.2524502) Dynamics of Rotating

[0070] Superconducting Magnetic Bearings in Ring Spinning, IEEE Transactions on Applied Superconductivity, 26 (2016) 3, S. 3600804 / 1-4.

[0071] [9] Spa ring, M.; Berger, A.; Wall, F.; Lux, V.; Hameister, S.; Berger, D.; Hossain, M.; Abdkader, A.; Fuchs, G.; Cherif, C.; Schultz L. https: / / doi.org / 10.1109 / TASC.2016.2524641) Mathematical modeling of the dynamic yarn path as a function of the spindle speed in a ring spinning process, Textile Research Journal, 86 (2016) 11, pp. 1180-1190.

[0010] Hossain, M.; Tente, C; Abdkader, A.; Cherif, C., Beitelschmidt M. https: / / doi.org / 10.1177 / 0040517515606355), Measurement methods of dynamic yarn tension in a ring spinning process, Fibres & Textiles in Eastern Europe, 1 (2016) 115, pp. 36-43.

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[0011] Hossain, M.; Abdkader, A.; Nocke, A.; Reimar, U; Krzywinski, F.; Hasan, Mmb.; Cherif, C.

[0073] (See online at https: / / doi.org / 10.5604 / 12303666.1172098) Mathematical modeling of the dynamic yarn path as a function of the spindle speed in a ring spinning process based on a superconducting magnetic bearing, Textile Research Journal, 87 (2017) 8, pp. 1011-1022.

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[0012] Hossain, M.; Telke, C.; Sparing, M.; Abdkader, A.; Nocke, A; Unger, R; Fuchs, G; Berger, A; Cherif, C.; Beitelschmidt, M; Schultz, L. https: / / doi.org / 10.1177 / 0040517515606355)Modeling of the yarn path in the ring spinning process with a superconducting high-performance twist distribution system. Melliand Textilberichte 1(2017), pp. 30-32.

[0075]

[0013] Hossain, M.; Abdkader, A.; Cherif, C. Analysis of yarn properties in superconducting magnetic bearing based ring-spinning process. Textile Research Journal 88 (2018) 22, pp. 2624-2638, Hossain, M.; Abdkader, A.; Cherif, C. https: / / doi.org / 10.1177 / 0040517517725122), Mathematical modeling of dynamic yarn path taking into account the balloon control ring and yarn elasticity in the ring spinning process based on the superconducting bearing twisting element. Fibres & Textiles in Logistics Europe, 26 (2018) 5, pp. 32-40.

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[0014] Hossain, M.; Telke, C.; Abdkader, A.; Sparing, M.; Espenhahn, T.; Huhne, R.; Cherif, C.; Beitelschmidt, M., https: / / doi.org / 10.5604 / 01.3001.0012.2528)Theoretical model of yarn path considering the balloon control ring and yarn elasticity in a ring spinning machine with superconducting magnetic bearings. In: CD-ROM. 18th AUTEX World Textile Conference (Turkey), June 20-22, 201.

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[0015] Hossain, M., Telke, C; Abdkader, A.; Espenhahn, T.; Cherif, Beitelschmidt, M. 300 percent performance increase in spinning chemical fibers on a turbo ring spinning machine with a frictionless superconducting twist distribution system. In: Conference proceedings. 58th Dornbirn Global Fiber Congress, Austria, September 11–13, 2019.

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[0016] Hossain, M., Abdkader, A,; Cherif, C.; Sparing, M,; Espenhahn, T.; Chickens, R.; Nielsch, K. In situ measurement of dynamic yarn path in a turbo ring spinning process based on superconducting magnetic bearing twisting system, Textile Research Journal (2019).

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Claims

Patent claims 1. Device for winding and twisting fiber material in ring spinning or ring twisting machines with stators comprising at least one high-temperature superconducting material and stator cooling, and with ring-shaped magnetic field-generating rotors coaxially associated with the rotatable spindles, which together with a connected rotor serve to guide and wind the thread on the respective spindle, characterized in that at least two high-temperature superconducting stators (1) together with their thermally connected cooling devices are arranged contactlessly and parallel to each other along the course of the spindle row, and the magnetic field-generating rotors (2) aligned coaxially to the spindle (3) are magnetically levitated in the magnetic field of the continuous space between the respective adjacent stators (1).

2. Device according to claim 1, characterized in that the magnetic field-generating rotors (2) are provided with ferromagnetic magnetic flux collectors which serve to increase the field strength and guide the magnetic field towards the high-temperature superconductor (4).

3. Device according to claim 1, characterized in that the high-temperature superconducting stators (1) each consist of at least two HTS bulk elements, which are sectionally separated from each other and are assigned to the respective magnetic field-generating rotors (2).

4. Device according to claim 1, characterized in that the high-temperature superconducting stators (1) consist of layered material and are designed in a ribbon or cable shape in their longitudinal extent.

5. Device according to claim 1, characterized in that the high-temperature superconducting stators are formed from a thermally insulated tube-in-tube configuration, wherein the inner stator, containing the HTS stator (1) the connected “cold” tube (8) has a temperature below the superconducting critical temperature and the outer tube (9) assumes the surrounding room temperature.

6. Device according to claims 1 and 5, characterized in that the outer tube (9) is formed from a material which has a high electrical conductivity suitable for generating eddy currents and thereby provides additional magnetic stabilization during rotary spinning and twisting operations.

7. Device according to claim 1, characterized in that the stators (1) each consist of a YBaCuO crystal of the composition Y1Ba2Cu3O x(Y123) or a single crystal of the REBaCuO group of composition RE1Ba2Cu3O x (RE- Rare Earths) as well as the bismuth family superconductor BiSrCaCuO are formed.

8. Device according to claim 1, characterized in that the stators (1) each consist of several single crystals arranged in series or grown together.

9. Device according to claim 1, characterized in that the magnetic field-generating rotors (2) each have a surrounding bandage (13) made of a material with high tensile strength in order to compensate their centrifugal forces.

10. Device according to claim 1, characterized in that in the stator-cryostat arrangement, electrodynamically supported levitation is effected for the purpose of additional stabilization by means of a material with high electrical conductivity and due to eddy current generation in the metallic surface of the cryostat.

11. Device according to claims 1 and 5, characterized in that the inner tube (8) is cooled by supplying liquid nitrogen and thermal vacuum insulation is provided between the inner and outer tubes (8;9) and thermal heat conduction between the inner and outer tubes (8;9) is prevented by point-like supports (11; 12) of mechanical spacer assemblies (10) placed between the tubes (8;9).

12. Device according to claims 1 and 5, characterized in that the inner tube (8) is cooled by a connection with a cryocooler.

13. Method for winding and twisting fiber material in ring spinning or ring twisting machines, in which the permanent magnetic rings serving as rotors are mounted in high-temperature superconducting magnetic bearings, characterized in that a device according to one of claims 1 to 12 is provided, in which the rotors (2) coaxially assigned to the spindles (3) are magnetically levitated within a continuous space between two stators (1) connected to cryostats and arranged parallel and without contact along the spindle row, wherein simultaneous cooling of all stators (1) is carried out by the cryostats connected to the stators (1) and thereby also extending along the spindle row.

14. Method according to claim 13, characterized in that the cooling of the stators (1) is carried out by supplying liquid nitrogen via the inner tube (8) of a tube-in-tube connection of the cryostat extending along the spindle row, the thermal insulation between the inner and outer tube (8;9) is provided by vacuum insulation and the recirculated “cold” working gas N2 (14) is condensed and liquefied by means of continuous mechanical recooling and is returned to the cooling circuit.