| 摘要 |
The support disk (14) structure, as a bearing support for the shaft (21) of an open-end spinning rotor, has a groove (3) to clean the rotor shaft (21) in the running surface (144) of the disk cladding (143) round the base body of at least one disk (14). The cleaning groove (3) is angled at least partially to the center axis of the running surface (144). The groove (3) is closed, with a width and depth of 0.2-2.0 mm. The disk running surface (144) can be fitted with a number of cleaning grooves (3), parallel to each other or intersecting with each other. The disk running surface (144) has preferably two cleaning grooves (3) and one or more additional cooling grooves, at right angles to the support disk (14) axis and round its circumference. The running surface (144) can be fitted with additional notches. The running surface (144) of the disk cladding (143) is smooth and unbroken between the disk edge (142) and the groove edge (31) towards it, round the disk circumference. At least one groove edge (31) extends out to the disk edge (142). The running surface (144) of the disk cladding (143), as seen axially, is taken up by max. 40% by a cooling groove and/or cleaning groove (3), and preferably 7% to max. 25%. The running surface (144) is interrupted by a maximum of three grooves, for cooling and cleaning. The cleaning groove (3) is narrower than the cooling groove. The body (5) of the disk has a recess at its circumference, matching the structure of the cleaning groove (3), to maintain a constant radial thickness of the cladding (143) between the disk body (5) and cleaning groove (3). The cleaning groove (3) has a U- or V-shaped profile. The disk cladding (143) is of a plastics material, with an electrical resistance of ≤ 1.0 x 10<9> ohm, at least at the running surface (144) zone. The electrical resistance is preferably ≤ 3.5 x 10<8> ohm, or between 2.0 x 10<8> ohm and 1.0 x 10<6> ohm. The plastics cladding material can contain additives to reduce the electrical resistance, as a metal powder which can be powdered carbon such as soot. The rotor shaft (21) is coated and has a cleaning groove, at least where the shaft is supported by a bearing mounting disk, as a spiral groove round the rotor shaft (21). The groove has a depth of at least 5 mu m and maximum 0.4 mm, or a depth of 10 mu m to 0.2 mm, and a width of at least 0.1 mm and maximum 1.0 mm or 0.2-0.6 mm. The shaft cleaning groove is pitched at an angle of 10-45 degrees to the rotor shaft axis in one direction at one pair of support disks and in the opposite direction at the other pair of support disks. Or the shaft cleaning grooves are at right angles to the rotor shaft axis. At the contact zone with the support disk running surface (144), the rotor shaft can have a second cleaning groove, angled in the opposite direction to the first shaft cleaning groove at that point. |
