TD7000 series spinning spindle is a kind of high-speed and high-performance spindle, which is equipped with the novel HPS-68 insert independently developed by our company. The HPS-68 insert incorporates both a roller neck bearing and a convex footstep bearing, the convex footstep bearingconsists of a radial bearing which functions hydrodynamiclly and an axial plane-thrust bearing to absorb the axial forces. As the innerdiameter of the neck bearing is 6.8 mm, it has been possibleto reduce the whorl diameter to even smaller. The blade is very short andconsequently extremely rigid. The forces acting radially in the area of the footstep bearing are absorbed by a genuine hhydrodynamic radial bearing. The sphero-point of the blade runsona free-sitting flat disc, which resists axial forcesCThe entire foootstep bearing is housed in an elastic sleeve, even the slighttest eccentric movements are damped by means of the ofil coil. Neck bearing geometry which has been modified in the micro-range lends additional stability to spindle operation. The use of sophhisticated new-type advanced and applicable production lines with mature modern equipment ensures a high degree of precisionVery little play, held to close tolerances, is provided in neck and footstep bearings,and this has a positive influence on spindlerunning. Such a footstep bearing design offers substantial advantages in particular for high speeds and axial loards. The aluminum rod made of high-strength and superhard aluminum :alloy is hold by the spindle blade and the wharve from inside and outside,has good rigidity, can not loosen to move, and thus can effectively resist external impact deformation. The spindle
insert adopts reliable axial overload protection to resist impact without subsidence and is suitable for push-down pipe inserttion of integral auto-doffing. The optimized design of the yarn cutter leads tohigh doffing yarn reserve rate. The use of a yarn gripper can realize doffing with zero winding and no end yarns. The accurate fit between the spindle bolster and the rail of the spinning frame ensures good verticality of the spindle to realize non-corection installation.
The spindle is targeted at domestic and foreign high levelcustomers, is widely applied to high-speed spinning, spinning high-quality yarns, compact spinning, integral auto-doffing andd speed increase reform of a spinning frame, and the highest working speed of the spindle can reach to 25000rpm. The alurminum plug can be adjusted in type and size according to customer's requirements to allow customers to fit different types and sizes of bobbins.
