Suessen: 新型上加压臂

Suessen HP系列上加压臂的优异性能世界闻名.这是Elite紧密纺纱系统在短纤和精纺领域获得一席之地的关键因素之一.     

集聚纺网格圈的研究现状

网格圈是目前国内外应用最为广泛的集聚纺纱装置的重要元件,对成纱质量起关键作用,网格圈的制作有很高的要求。文中阐述了国内外网格圈的制作方法和性能要求,并对国内网格圈的发展现状作了简单介绍。     

集聚纺网圈的结构和制造初探

介绍了集聚纺用网圈的结构、功能和织造方法,将国产天问公司网圈和进口网圈对比试验后表明,两者的效果非常接近。网圈外表面摩擦因数大,内表面摩擦因数小,这一要求必须通过选用合适的织物结构达到。     

基于图像处理的网格圈织物孔隙率检测

针对目前网格圈织物的孔隙测试相对困难的问题,本文采用图像处理方法对其孔隙及孔隙率的检测进行研究。首先对扫描所得的网格圈织物图像采用阈值分割方法将其转换成二值图像,对该二值图像可利用投影法判断经纬纱直径,计算得到理论孔隙率;然后对二值图像中纱线主体部分的干扰区域进行剔除,图像取反;最后通过面积滤波后提取孔隙数量、孔隙面积大小、孔隙分布以及计算实际孔隙率等指标,并且对面积过小的孔隙进行位置标定。实验结果表明,用图像处理方法对网格圈织物进行检测,能够客观反映网格圈织物的孔隙率和孔隙分布的均匀性,且实际孔隙率远低于理论孔隙率。     

Effects of lattice apron density on yarn qualities in Four-line compact spinning system

In the paper, using finite element method (FEM), the effects of lattice apron density on yarn qualities in Four-line compact spinning system were studied by analyzing the numerical simulations of the airflow velocity. Firstly, three different kinds of yarns, 18.2tex (32^S), 9.7tex (60^S), and 5.8tex (100^S), were spun on FA507B spinning frame equipped with lattice aprons of mesh size 150, 120, and 100, respectively. The hairiness, breaking strength, and evenness of spun yarns were tested and comparatively analyzed. Secondly, using FEM, the numerical simulations of the airflow velocity in the condensing zone were presented. The finite element model of condensing zone was constructed according to the physical parameters of the practical system. Then, the simulation of airflow velocities on five straight lines located in the front, middle, and back of condensing zone were given. It is shown that, in the whole condensing zone, for the lattice apron with mesh size 100, the direct transverse condensing force is high, but the assisted condensing force is low and disorder, which is not beneficial for yarn qualities. Compared to the lattice apron with mesh size 150, the usage of lattice apron with mesh size 120 may be beneficial for the high-count yarn condensing or the yarn condensing under the relatively lower negative pressures. Furthermore, taking the 9.7tex as an example, the trajectory of yarn movement in the condensing zone was given using high-speed camera system OLYMPUS i-speed3. Corresponding airflow velocities along the yarn movement path were presented.     

网格圈集聚纺纱系统三维流场表征与分析

通过建立流体动力学模型,利用标准κ-ε湍流模型及并行计算技术对网格圈集聚纺纱系统集聚区流场进行了模拟与表征,分析集聚区域内气流的流动状况,解析吸气斜槽入口曲面上气流的静压分布及速度分布规律,并讨论速度分布对须条的作用效果。研究结果表明：网格圈集聚纺纱系统是利用负压效应来产生集聚气流;斜槽入口曲面上的负压使网格圈向异形管内凹;X、Y、Z轴向的速度分量对须条的作用效果各不相同;集聚区产生附加捻度的区域主要靠近吸气斜槽的S1端。     

网格圈集聚纺纱系统三维流场表征与分析

 通过建立流体动力学模型,利用标准κ-ε湍流模型及并行计算技术对网格圈集聚纺纱系统集聚区流场进行了模拟与表征,分析集聚区域内气流的流动状况,解析吸气斜槽入口曲面上气流的静压分布及速度分布规律,并讨论速度分布对须条的作用效果。研究结果表明：网格圈集聚纺纱系统是利用负压效应来产生集聚气流;斜槽入口曲面上的负压使网格圈向异形管内凹;X、Y、Z轴向的速度分量对须条的作用效果各不相同;集聚区产生附加捻度的区域主要靠近吸气斜槽的S1端。     

绪森紧密纺专件的使用

探讨绪森紧密纺专件使用效果.对绪森紧密纺摇架、依丽辊、网格圈,导棒、钢领、钢丝圈等纺纱专件的性能特点和使用管理要求进行了试验分析和论述.在日常生产管理中,首先掌握其特性.兼顾质量与成本两个方面的要求,做到合理选用.同时,要加强专件设备管理和有关运转操作管理,制定严格的工作要求和管理规范.只有认真细致地做好各项基础管理工作.才能使进口设备始终保持良好的设备状态,在提高纱线质量方面发挥更大的作用.指出:紧密纺纺纱专件的正确使用和维护对于稳定和提高紧密纱质量、降低生产成本有着重要的意义.     

Suessen:评价原材料的测试系统

QuickSpin系统(QSS)由德国Suessen纱锭制造公司制造,它包含两个独立的单元:MDTA 3(微尘-杂质分析仪)和QUS(快速纺纱单元).QSS只需要少量纤维样品(最高10 g)及短的测量时间.     

Numerical simulation on the condensing effect of suction slot in compact spinning with lattice apron

In this paper, a geometrical model is built by the actual structure of a condensing zone in compact spinning with lattice apron, and a fluid dynamics model is designed by FLUENT to study the numerical simulation of flow field in the condensing zone of straight, oblique, and deformed suction slots. The result shows the laws of airflow static pressure and velocity distribution of three kinds of condensing zones. The difference of distribution between compact direction and adsorption direction of strand is stressed on, which is helpful to make a deeper study on the mechanism of compact spinning with lattice apron and provide a theoretical support for the optimal design of suction slot.