纤维在转杯纺纺纱器中的运动和形态变化分析  

A study on movement and deformation of fibers in rotor spinning devices

作　　者：龚新霞 邵秋 杨瑞华 GONG Xinxia;SHAO Qiu;YANG Ruihua(College of Textile Science and Engineering,Jiangnan University,Wuxi,Jiangsu 214122,China)

机构地区：[1]江南大学纺织科学与工程学院,江苏无锡214122

出　　处：《纺织学报》2024年第12期199-205,共7页Journal of Textile Research

基　　金：国家自然科学基金面上项目(52273034)。

摘　　要：为研究转杯纺关键部件(输纤通道、转杯)中纤维运动的规律,借助数值模拟软件Rocky DEM 2022R1和ANSYS Fluent 2022R1模拟了28 mm的棉纤维在输纤通道、滑移面和凝聚槽内的运动,结合气流场云图、纤维运动控制方程对棉纤维的速度、加速度、形态变化进行分析。结果表明,纤维在纺纱器的速度呈先增后不变的规律;纤维在输纤通道的速度为22~27.4 m/s,纤维形态不会有大幅度变化;纤维在转杯内的速度为27.4~115.5 m/s,纤维在凝聚槽由多段小幅度弯折状态,转变为完全伸直紧贴凝聚槽壁面的状态。通过数值模拟分析纤维速度和形态变化的根本原因,可从理论上为生产优化和设计解决方法提供指导,对转杯纺输纤通道、转杯等关键部件的设计具有一定参考意义。Objective Rotor spinning is based on the transportation of fibers using airflow as a carrier.However,the core spinning assembly is a closed entity,and the spinning process cannot be directly observed.With the help of numerical simulation,the movement behavior of fibers in the spinning machine can be observed and analyzed in order to address the instability of the spinning process and provide optimization solutions,and to reduce fiber waste in production.This study is also an effort yo enhance the understanding of the theoretical basis for rotor spinning of yarns.Method The fiber motion trajectory was modelled using the Lagrangian-Euler method by considering the airflow as a continuous phase and the fibers as discrete phases.3D modeling software SolidWorks 2021 was used to establish a model for the rotor spinning assembly,and the numerical analysis was carried out using Rocky DEM 2022R1 and ANSYS Fluent 2022R1.The airflow field was selected using the Standard k-epsilon turbulence model,Standard Wall Function(SWF),and SIMPLE algorithm.The fiber model was modelled a rod-chain structure,made of cotton fiber with a length of 28 mm.Results The velocity of the fiber in the fiber transport channel was chosed to be(22-27.4)m/s,with a small increase in velocity and acceleration.The velocity and acceleration were gradually increased along the fiber movement direction.The velocity of the fiber on the slip surface of the rotor was set in the range of(27.4-61.1)m/s.After the fiber tip contacts the slip surface of the rotor,the velocity was increased rapidly.The increase in normal contact force was found to be the main reason for the increase in fiber acceleration.After entering the coagulation tank,the velocity of the fibers was further increased as indicated by the fiber acceleration.After reaching the maximum value of 115.5 m/s,the velocity remained stable.When the fibers were located in the fiber transport channel,they basically maintained their morphology at the entrance and did not undergo significant morphological change

关 键 词：转杯纺 纤维运动 流固耦合 纤维模型 受力分析 

分 类 号：TS111[轻工技术与工程—纺织材料与纺织品设计]