转杯纺梳针式与锯条式分梳辊的对比试验研究

通过转杯纺梳针式与锯条式分梳辊的对比试验,研究了这两种型式的分辊对成纱质量的影响及其使用寿命等问题。试验结果表明,梳针式分梳辊在转杯纺纱机上纺化纤或棉与化纤混纺纱时,可以提高成纱质量,并且梳针式分梳辊的使用寿命比锯条式的长。     

苎麻纯落麻转杯纺分梳元件的研究 第二报:分梳辊主要工艺参数的优化设计

本文报道了纺制(98.4～45.4tex)(6～13Ne)苎麻纯落麻转杯纱时,分梳辊转速的优化设计。文章首先利用二次通用旋转组合设计求取纺纱细度、分梳辊转速二个变量因子与衡量指标之间的高精度回归方程,进而绘制并分析相应指标的二维等高线图;其次,利用目标规划法建立优化数学模型,并采用随机方向搜索法进行求解;最后,对求得的最优解进行验证试验。研究结果表明,不同纺纱细度下,在5000～9150r/min范围内分梳辊转速对纺纱稳定性没有显著影响,而对转杯纤维环中超、倍长纤维含量及成纱质量有较大影响;在98.4～45.4tex纺纱细度范围内,SAQ-12型锯齿辊转速为7075r/min时,转杯纤维环中超、倍长纤维含量较少,纺纱稳定性及成纱质量较好。     

腈纶纤维分梳性能及转杯纱质量的研究

研究了３种特性不同的腈纶纤维的分梳性能及其成纱质量．实验表明,不同特性的腈纶纤维的分梳性能是不同的．随分梳辊速度的提高,纤维拉伸特性下降、长度减短;纺杯内的积尘量与纤维损伤的程度有着直接的关系;转杯纱的质量与纤维的分梳性能有着密切的联系．     

分梳辊针布规格及其速度配置与转杯纱质量的关系

考察了分梳辊针布规格及其速度配置与转杯纱质量的关系,为工厂分梳辊针布的合理选择、转杯纱低捻工艺提供参考。     

细旦纤维转杯纺纱研究——分梳辊、假捻盘型式及规格的多目标灰色局势决策

应用多目标灰色局势决策的处理模式,对国产细旦涤纶纤维(0.89 dtex×38mm)转杯纺进行了分梳辊、假捻盘型式及规格的对比分析。提出了在一定的纺纱条件下采用针辊10°(植针角)×8头72等分直形排列与表面光滑假捻盘φ18mm×R7mm×2.0mm配置能够获得成纱质量综合性能较好的纺纱效果。     

纺纱工艺对转纱质量影响的探讨

本文考察了转纺纱前不同的梳棉形式、分梳辊锯齿规格及其速度配置对转杯纺纱质量的影响，结果表明，上述诸因素均对成纱质量影响显著。并通过对比试验，表明，国产SAQ－5X及SAC－12锯条成纱的综合效果优于或接近HS6T原备件。     

纺纱工艺对转杯纱质量影响的探讨

本文考察了转杯纺纱前不同的梳棉形式、分梳辊锯齿规格及其速度配置对转杯纺纱质量的影响,结果表明,上述诸因素均对成纱质量影响显著。并通过对比试验,表明,国产SAQ—5X及SAC—12锯条成纱的综合效果优于或接近HS6T原备件。     

棉条制备等因素对转杯积杂及成纱质量的影响

通过对棉条制备、分梳辊速度及锯齿工作角度、纺纱杯速度与转杯纺工艺过程及成纱质量的分析及实验，得出了纺杯积杂、纤维损伤、纤维伸直度及成纱质量与诸因素的关系，并进一讨论了所得结果及产生原因。     

中细特摩擦纺纱机主要元件的设计及其纺纱工艺的研究

本文主要介绍中细特摩擦纺纱机分梳装置、输棉管道、尘笼等主要元件的设计与制造技术，同时也讨论了分梳辊转速、逆向引纱方法以及其它工艺过程     

苎麻纯落麻转杯纺分梳元件的研究——第一报:分梳辊型式和规格的模糊决策

本文应用模糊决策和模糊聚类分析相结合的处理模式。对苎麻纯落麻转杯纺适用的分梳辊型式和规格进行了研究。结果表明:此种处理模式有利于提高所得结论的可靠性与客观性,可应用于其它类似研究;纺制纯落麻转杯纱时,大工作角、大齿距、小齿高、细小齿形、光结度及耐磨性好的锯齿辊有利于改善纺纱性能和成纱质量;针辊是纯落麻转杯纺用分梳辊的发展方向。     

Study of Rotor Spun Basofil/Cotton Blended Yarn Quality Characteristics during Optimisation of Processing Parameters

Yarn quality characteristics are affected by processing parameters. A 36 tex rotor spun yarn of 50/50 Basofil/ cotton （B/C） blended yarn was spun, and the spinning process optimised for rotor speed, opening roller speed and twist factor. Selected yarn characteristics were studied during the optimization process. During the optimizations process yarn elongation and hairiness reduced with increase in rotor speed. Tenacity increased with increase of rotor speed. The increase in TF caused tenacity and CV of count to increase up to a peak and then started to decrease with further increase of TF.While TF caused an increase in yarn hairiness, elongation decreased to a minimum level and then started to increase with further increase of TF. CV of count and hairiness increased with increase in opening roller speed, but tenacity and elongation decreased with increase in opening roller speed. The optimization process yielded the optimum levels for rotor speed, opening roller speed and twist factor （TF） as 45,000 rpm, 6,500 rpm and 450 respectively. As per uster Standards the optimum yam showed good results for CV of count, CV of tenacity and thin places/km.     

关于摩擦纺纱尘笼和摩擦辊的速比试验

本文讨论了摩擦纺纱中纱条稳定回转的条件,对单尘笼摩擦纺中尘笼和摩擦辊的不同速比进行了试验。通过试验得出在尘笼各项参数一定的条件下,存在最佳速比。     

THE INFLUENCE OF COMBING ROLLER SPEED ON PURE RAMIE NOIL ROTOR YARN QUALITY AND SPINNING PERFORMANCE

This paper reports the optimum design of combing roller speed with reference to yielding 6-13 Ne(98.4—45.4 tex) pure ramie noil rotor-spun yarns. The universal rotatable composite design is adopted to get the highly precise regression equations, in which the variables are combing roller speed and yarn linear density considered to be the main technological parameters of combing roller and, the responses are the evaluation indexes concerning spinning stability, fiber length distribution of fibre ring from rotor groove and yarn properties. Based on these regression equations, the contours are plotted to analyse the influences of the parameters on the evaluation indexes; the optimization multicriteria mathematical model is simultaneously established to obtain the optimum parameters with the aid of Object Programming Approach along with Constrained Random Ray Method. Finally, an experiment is carried out to further test the acceptance of the calculated optimum values. It is shown that, for any yarn linear density within 6—13 Ne (98.4—45.4 tex), combing roller speed varying from 5000 to 9150 r/min affects content of extra-long fibre in fibre ring from rotor groove and yarn properties but does not significantly influence spinning stability; 7075 r/min, at which the SAQ-12 type of saw-toothed combing roller runs, is recommended to be the optimum combing roller speed for producing 6—13 Ne (98.4—45.4 tex) pure ramie noil yarns, where a compromise is achieved among the lowest content of extra-long fibre in fibre ring, the best spinning stability and the best yarn properties.     

中细支摩擦纺纱分梳工艺参数对成纱质量的影响

本文首先通过定量分析,对摩擦纺纱分梳质量及其主要影响因素进行了讨论。在此基础上,采用二次通用旋转组合设计的试验设计方法,建立了主要的分梳工艺参数与中细支摩擦纺成纱质量的回归方程。分析和讨论的结果表明,分梳刺辊转速与纺纱号数的合理选配对保证纺纱品质指标、降低成纱不匀率和粗细节有着重要的意义。     

EFFECT OF OPENING OPERATING PARAMETERS ON YARN QUALITY IN FINE AND MEDIUM COUNT FRICTION SPINNING

In this paper, a quantitative analysis of the opening quality in friction spinning and its main ef-fecting factors is first made. Upon this basis the Box-Hunter's experimental design method is usedto establish the quadratic regressional equations in terms of primary opening technologicalparameters and yarn quality for medium and fine count friction spinning. The results of analysisand discussion show that the proper choice of opening roller speed and its reasonable match withthe yarn count is singificant for ensuring the spinning quality index as well as reducing unevenness,thin and thick places of the yarn.     

基于Timoshenko梁模型的旋转弹箭横向振动模态分析

将旋转弹箭简化为Timoshenko旋转梁,基于有限单元法研究了其在自由飞行时的横向振动模态.采用Timoshenko梁模型,考虑陀螺效应和剪切效应,运用转子动力学和有限单元法的思想,建立旋转弹箭横向振动的有限元方程和频率方程.利用该频率方程,分别采用Rayleigh梁和Timoshenko梁模型对某旋转弹箭进行模态分析,对不同梁模型下的横向振动进动频率进行对比,并讨论弹箭转速和长径比对模态频率的影响.     

麻赛尔/棉转杯纺纱工艺研究

以捻系数、分梳辊速度、转杯速度为试验因子,采用单因子实验和二次通用旋转组合设计法,研究麻赛尔/棉混纺纱线性能与工艺参数之间的关系,找出最佳工艺参数;并用最佳工艺参数纺制不同混纺比的麻赛尔/棉混纺纱,比较不同混纺比对纱线性能的影响.结果表明：随着捻系数、分梳辊速度、转杯速度的增加,成纱的断裂强力均呈现出先增加后下降的变化规律;随着麻赛尔纤维含量的增加,混纺纱线的断裂强力逐渐下降.     

转杯纺纯棉竹节纱的工艺探讨

通过在BD200SN转杯纺纱机上加装伺服驱动自控系统,控制纤维喂入量来改变牵伸倍数的方式实现纺制转杯纺纯棉竹节纱.通过工艺实验,分析了纤维性能、纺纱工艺等因素对转杯纺纯棉竹节纱质量的影响,探讨了生产转杯纺纯棉竹节纱的工艺措施,纺制了符合质量要求的转杯纯棉竹节纱.     

采用传递矩阵法分析复合转子系统动态特性

将传递矩阵法应用于结构复杂的复合转子系统,对高速纺丝卷绕夹头的临界速度及其振型进行了理论推导与计算。其分析计算方法对高速纺丝卷绕夹头的设计及其其它类型的复合转子系统的动态特性分析具有实际的参考价值。