Effect of position of the fiber transport channel on fiber motion in the high-speed rotor

Abstract

The task of the fiber transport channel (FTC) is to transport the fibers from the carding roller to the rotor. Its geometric position in the spinning machine has a strong influence on the characteristics of the airflow field and the trajectory of the fiber motion in both the rotor and the FTC. In this paper, a three-dimensional pumping rotor spinning channel model was established using ANSYS-ICEM-CFD software with three different positions of the FTC (positions a–c). Further, the simulations of air distribution were performed using Fluent software. In addition, the discrete phase model was used to fit the fiber motion trajectory in the rotor. The simulation results showed that among the three types of FTC, position b is the optimal condition. The gradients of airflow velocity in the channel at position b were greater than those of the other two positions, which is conducive to straightening of the fiber.

Progress of air flow field and fiber motion analysis in textile manufacturing process: a review

“…Enhanced velocity gradient facilitates fiber orientation in the fluid, and Yang et al 108 pointed out that increasing the height of the fiber transport channel enhanced the velocity gradient. Subsequently, the combined arrangement of the dust removal device, the transport channel, and the fiber inlet was optimized.…”

“…In most studies of textile shear flow fields, fibers are compared with particles. Yang et al 108 compared fibers with particles, ignoring the interactions between fibers, the interaction between fibers and the rotor wall, and the weight of the fibers. The discrete particle model (DPM) model was used to simulate the fiber trajectory, and there were significant differences in the fiber trajectories placed at different positions at the inlet of the transfer channel.…”

Effects of trash-removing part geometry on the airflow in the rotor spinning unit and the yarn properties

“…7 Further, three different positions of the transfer channel during rotor spinning were studied, and a discrete phase model was used to fit the fiber motion trajectory. 8 In addition, the airflow characteristics in a rotor spinning unit with V and U-type rotor accumulation grooves were reported. 9 It was found that the rotational velocity of the rotor can greatly affect the flow characteristics in the rotor, and there was a critical rotational velocity of the rotor at which the pressure and velocity at the slip wall can remain stable.…”

Comparison of the airflow characteristics and yarn properties between conventional and dual-feed-opening rotor spinning units

“…Yang et al. 17 also studied three different positions of the transfer channel in the RSU and used a discrete phase model to fit the fiber motion trajectory. Moreover, Yang et al.…”

“…Kong and Platfoot 16 simulated the flow patterns inside the transportation zone of a rotor spinning machine and discussed their effects on yarn properties. Yang et al 17 also studied three different positions of the transfer channel in the RSU and used a discrete phase model to fit the fiber motion trajectory. Moreover, Yang et al 18,19 reported the airflow characteristics in the RSU with rotor accumulation grooves of V type and U type, respectively.…”