Abstract:

In order to study about the yarn tension of the balloon bottom with BC9 ring, this paper presented the ring traveler balance equations based on the force analysis of the planar ring traveller system. Ant the tension expressions were obatined taking factors of the air-drag and the Coriolis force. Besides, the angles of balloon bottom variation from -4° to 5° were given by high-speed photography technology and post-processing. Then it gave the tension values combined with the tension expressions above. Furtermore, it analyzed the impact of the angles of the balloon bottom and winding radius on the yarn tension. The results indicated that the yarn tension of the balloon bottom decreased with the increase of the winding radius and increased with the increase of the angles of the balloon bottom. Moreover, the yarn tension difference between winding majou diameter and minor diameter, increased with the angles of balloon bottom increased.

Key words: BC9 ring traveller, air-drag, Corilois force, yarn tension of balloon bottom, high-speed photography technology