输棉通道位置对转杯纺纤维运动的影响

为了研究输棉通道位置对纤维在纺纱通道中运动的影响,文章以直径42 mm转杯为例,采用Ansys软件中ICEM-CFD建立三维抽气式转杯纺纱通道模型,在Fluent商用软件中计算连续相气体流场,根据连续相计算结果拟合离散相纤维运动轨迹。保持边界条件不变,比较输棉通道位置不同时(Y=13 mm、Y=9.75 mm、Y=6.5 mm)转杯纺纱通道内气流分布特征及纤维运动轨迹的差异。试验结果表明:Y=13 mm(工况a)时,输棉通道内气流速度与压强变化梯度最大,有利于伸直纤维;工况b时,转杯凝聚槽负压最大,纤维进入转杯能较好地凝聚汇集,有利于纤维紧密凝聚成纱;输棉通道位置过低(工况c),转杯内部涡流分布不均,不利于转杯高速平稳转动。

Effect of fiber transport channel position on fiber motion in rotor spinning

In order to study the influence of the fiber transfer channel position on the motion of the fiber in the spinning channel,a 42 mm-diameter rotor was used as an example to establish a three-dimensional pumping rotor spinning channel model with ICEM-CFD in Ansys software.Continuous phase gas flow field was calculated in the Fluent commercial software.The discrete phase fiber motion trajectory was fitted according to the continuous phase calculation result.The boundary conditions remained unchanged,and the airflow distribution characteristics and differences of fiber motion trajectory in the rotor spinning channel were compared when the position of the fiber transport channel was different(Y=13 mm,Y=9.75 mm,Y=6.5 mm).The test results showed that:Y=13 mm(condition a),the airflow velocity and pressure gradient in the fiber transport channel were the largest,which is conducive to straightening the fiber.Under working condition b,the negative pressure of the rotor was the largest,and the fiber in the rotor could be well converged,which is beneficial to the close cohesion of the fibers into the yarn.When the position of the fiber transport channel was too low(condition c),and the vortex distribution inside the rotor was uneven,which is not conducive to the high-speed and smooth rotation of the rotor.