输纤通道对称性对双喂入双分梳转杯纺气流场以及纱线特性的影响  

Influence of fiber channel symmetry on dual-feed-opening rotor spinning flow field and yarn characteristics

作　　者：李玲 史倩倩 田顺 汪军[1,2] LI Ling;SHI Qianqian;TIAN Shun;WANG Jun(College of Textiles,Donghua University,Shanghai 201620,China;Key Laboratory of Textile Science&Technology,Ministry of Education,Donghua University,Shanghai 201620,China)

机构地区：[1]东华大学纺织学院,上海201620 [2]东华大学纺织面料技术教育部重点实验室,上海201620

出　　处：《纺织学报》2025年第2期69-77,共9页Journal of Textile Research

基　　金：中央高校基本科研业务费专项资金、东华大学研究生创新基金项目(CUSF-DH-D-2022028);上海市现代纺织前沿科学研究基地资助项目(X11012102-004)。

摘　　要：为利用双喂入双分梳(DFO)转杯纺技术的双“喂给-分梳-输纤”系统设计更好地拓宽纤维原料的适纺范围,利用数值模拟技术深入分析了输纤通道的对称性对DFO转杯纺纱器内部气流场的影响;通过图像处理和实验测试方法,探讨了2个输纤通道的夹角对纱线外观和性能的影响。仿真发现:对称的输纤通道为转杯提供了更加稳定、均衡的气流场静压与速度分布;而110°的输纤通道夹角使得转杯内产生局部负高压区,易影响此区域的纤维形态而导致纤维排列混乱。采用黑/白粘胶条子分别喂入2个喂给-分梳通道进行纺纱实验,结果表明:输纤通道对称的转杯纺纱器所纺纱线包缠更加紧密,2种颜色的纤维在纱线表面的分布较为均匀;输纤通道夹角为110°时所对应的纱线在强度、毛羽指数和条干均匀度上的表现比前者略差,并且从右输纤通道进入转杯的纤维更倾向于分布在纱线表面,呈现出鲜明的外观效果。综上,输纤通道的不对称性为开发具有独特风格的转杯纱开辟了新途径。Objective The design of the double fiber channels in dual-feed-opening(DFO)rotor spinning technology broadens the range of materials for spinning.The fiber channel is a key component that connects the opening roller and the rotor in the rotor spinning unit.However,studies on the airflow field and yarn characteristics of DFO rotor spinning when the spatial positions of the two fibers channels are not symmetrically distributed have not been reported to date.Method Building upon previous research on DFO rotor spinning with a fiber channel angle of 180°,this study constructed a control equation system for the airflow problem inside a DFO rotor spinning unit based on the Realizable k-εturbulence model,and discretized and solved the control equation system for unstructured grids using the finite volume method and SIMPLE algorithm.Based on the established numerical model,this study delved into the impact of the symmetry of the two fiber channels on the internal airflow field distribution within the DFO rotor spinning unit.Additionally,image processing techniques and experimental testing were utilized to compare and analyze the specific effects of the symmetry of the fiber channels on yarn characteristics.Results The fluent module in Ansys 19.0 software was used to simulate the internal flow field of DFO rotor spinning units with fiber transport channel angles of 180°and 110°,respectively.The convergence residual was set to 0.0001.Simulation results indicated that the tapered structure of the fiber channels caused the external airflow to accelerate continuously as it enters the two channels,reaching a maximum velocity of over 100 m/s at the channel outlets.When the two fiber channels were asymmetric,the outlets were in close proximity,and collision of the two high-speed airflow exiting the channels were observed,which resulted in a noticeable low-velocity airflow zone between the outlets.The airflow underwent significant energy transformation within the fiber channels,with a decrease in pressure potential energy and

关 键 词：双喂入双分梳转杯纺 输纤通道夹角 数值模拟 气流场分布 纱线特性 

分 类 号：TS104.1[轻工技术与工程—纺织工程]