BEARING ASSEMBLY AND METHOD FOR REDUCING GAPS BETWEEN CONSTRUCTIONAL MEMBERS OF BEARING ASSEMBLY

摘要

FIELD: turn formers used in high-speed mills for rolling wire in order to impart coil shape to rods. ^ SUBSTANCE: bearing assembly for mounting rotating hollow shaft in casing of turn former of rod rolling mill includes first and second roller bearing units mutually spaced in axial direction and arranged between hollow shaft and casing; mechanism for applying radial preliminary- interference effort to first bearing unit in first zone on its peripheral surface and causing counter-acting reaction effort in second zone of second bearing unit in its peripheral surface spaced by 180° from first zone. Each roller bearing unit includes roller members between round inner and outer races. Inner races are fixed relative to hollow shaft. Outer races are fixed relative to casing. Mechanism for applying effort rests upon casing and it is mounted with possibility of acting upon outer race of first bearing unit. Reaction force is applied by casing acting upon outer race of second bearing unit. Method for reducing gaps between constructional members of bearing assembly comprises steps of dividing bearing assembly by roller bearing units mutually spaced in axial direction; applying preliminary-interference effort to one bearing unit in first zone on its peripheral surface and creating counter-action due to providing reaction force acting upon other bearing unit in some zone on its peripheral surface spaced by 180° from first zone. ^ EFFECT: lowered slippage and vibration caused by gaps in front bearing assembly of turn former. ^ 9 cl, 4 dwg