Twist plays an important role to impart tensile strength in yarn during the spinning process. In the most widely used ring-spinning machine for short staple yarn production, a combination of ring and traveler is used for inserting twist and winding the yarn on cops. The main limitation of this twisting mechanism is the friction between the ring and traveler, which generates heat at higher speed and limits the productivity. This limitation can be overcome by the implementation of a magnetic bearing system based on superconducting technology, which replaces completely the existing ring/traveler system of the ring-spinning machine. This superconducting magnet bearing consists of a circular superconductor and permanent magnet ring. After cooling the superconductor below its transition temperature, the permanent magnet ring levitates and is free to rotate above the superconductor ring according to the principles of superconducting levitation and pinning. Thus the superconducting magnetic bearing (SMB) ensures a friction-free operation during spinning and allows one to increase spindle speed and productivity drastically. The yarn properties using the SMB system have also been investigated and they remain nearly identical to those of conventional ring yarns.
CherifC. Textile werkstoffe für den leichtbau, Germany: Springer, 2011, pp. 141–141.
2.
KleinW. The technology of short-staple spinning Short-staple Spinning Series - volume 1, Manchester, UK: The Textile Institute, 1998, pp. 47–47.
3.
OberholzerF. Ring and traveller systems- quality standards for superior performance. Rieter Customer Magazine2005, pp. 14–14.
4.
WulfhorstBGreisTVeitD. Textile technology, Carl Hanser: München, 2006, pp. 91–91.
5.
OxenhamW. Developments in spinning. Textile WorldMay 2003.
6.
Stalder H, Heff A, Oberholzer F, et al. Ring spinning machine with a variety of spinning rings and traveller located thereon. Patent DE 196 37 475 A1, Germany, 1998.
7.
Heinen H. Ring-traveller combination of ring spinning and twisting machine. Patent DE 10025191A1, Germany, 2000.
8.
Olbrich, A and Fölske, W. Ring-traveller allocation for yarn spinning with less hairiness. Patent DE 19824079 C2, Germany, 1998.
9.
Kusakari R, Hamaguchi M, Kobayashi N, et al. Spinning ring for a ring spinning machine and method of manufacturing thereof. Patent 6,568,164 B2, USA, 2003.
10.
Poquette GE and Groves GP. Coating for spinning applications and rings and travellers coated therewith. Patent 5,313,773, USA, 1994.
11.
Bodnar, ML. Coated spinning rings and travellers. Patent 5, 086,615, USA, 1992.
12.
Giovanni, B. Rotating ring. Patent EP 026161A1, Europe, 1980.
Abdel-Hady F and El Mogahzy. Ring spinning system for making yarn having a magnetically elevated ring. Patent US 7,205,692 B2, USA, 2007.
24.
Abdel-hadyFEl MogahzyYAbuEleninS. Innovative approach to high-speed spinning using a magnetically-elevated spinning ring. AUTEX Res J2006; 6: 113–121.
25.
Cherif C, Abdkader A, Schultz L, et al. Spooling and spinner device of a ring spinning frame or a ring twisting frame, and ring spinning and ring twisting method. Patent WO 2012/100964 A2, International, 2012.
26.
BuckelWKleinerR. Superconductivity, fundamentals, and applications, WILEY-VCH GmbH & Co. KGaA: Weinheim, Germany, 2004, pp. 282–282.
27.
Hossain M. Theoretical analysis of superconducting magnetic bearing and their suitability in ring/traveler system in the ring spinning machine. Master’s Thesis, Department of Mechanical Engineering, Technische Universität Dresden, Germany, 2010.
WerfelFNFlögel DelorURothfeldR. HTS magnetic bearings. Phys C2002; 372: 1482–1486.
30.
SorberJGerlachGFuchsG. Superconducting magnetic bearing in a cryogenic pump. In: MaißerPTenbergeP (eds) proceedings of the first international symposium on mechatronics (ISOM 2002). 21–22 March 2002. Chemnitz. 176–182.
31.
KrabbesGFuchsGCandersWR. High temperature superconductor bulk materials, fundamentals-processing-properties control-application aspects, Weinheim: WILEY-VCH GmbH & Co. KGaA, 2006.
32.
CampbellAMCardwellDA. Bulk high temperature superconductors for magnet applications. Cryogenics1997; 37: 567–567.
33.
CardwellDA. Processing and properties of large grain (RE) BCO. Mater Sci Eng B1998; B53: 1–1.
34.
Hari BabuN. New chemically stable nano-size artificial flux pinning centers in (RE)-Ba-Cu-O superconductors. Supercond Sci Technol2003; 16: L44–L44.
35.
Haas OD, Schultz L, Berger D, et al. Demonstration für magnetbahnsystem mit supraleitern im trag-und führsystem. Special Edition of eb- Elektrische Bahnen, Band 8--9, 2009.
36.
BatraSKGhoshTKZeidmanMI. An integrated approach to dynamic analysis of the ring spinning process, part I: without air drag and coriolis acceleration. Textil Res J1989; 59: 309–317.
37.
BatraSKGhoshTKZeidmanMI. An integrated approach to dynamic analysis of the ring spinning process, part II: with air drag and coriolis acceleration. Textil Res J1989; 59: 416–424.
38.
GhoshTKBatraSKZeidmanMI. An integrated approach to dynamic analysis of the ring spinning process, part III: the effect of coefficient of friction and the balloon control rings. Textil Praxis Int1992; 47: 791–800.
39.
BatraSKGhoshTKFraserWB. An integrated approach to dynamic analysis of the ring spinning process, part IV: inherent instability of the free balloon. Textil Res J1995; 65: 417–423.
40.
FraserWB. On the theory of ring spinning. Phil Transactions R Soc Lond1993; 342: 439–468.
