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Opening of the fibres in all industrial rotor spinning units is being done by an opening roller, which intakes the fibres
from one feed point. Increasing number of feed rollers from one to two may improve fibre opening on the opening roller by
gradual loading of the opening roller, which may improve fibre orientation in the final yarn and yarn properties. In this
research a modified SE-8 rotor spinning unit of Suessen was used in which two separate fibre feed systems were employed. Raw
material used was 38 mm, 1.7 den viscose fibre, to spin a 40 tex yarn. Yarn properties produced with this unit, were compared
with that of the original yarn. Yarn properties tested were tenacity, extension, work of rupture, mass irregularity and imperfections,
abrasion resistance and hairiness, which were measured on Shirley (SDL) and keisokki yarn testing machines. Test results were
analyzed by ANOVA for any difference between the means, and Tukey and Duncan for classification and ranking of the yarn properties.
Test results showed that, tenacity, extension and work of rupture of the modified yarn increased in comparison to the original
yarn. Its mass irregularity, number of thin places and neps, and hairiness decreased. Number of thick places and yarn abrasion
didn’t change. According to the test results, it was concluded that increasing the number of feed rollers on the opening roller
from one to two has improved yarn properties. 相似文献
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This paper provides preliminary results on the relative performance of the adaptive neuro-fuzzy system inference (ANFIS) model
versus linear multiple regression method, when applied to the use of cotton fiber properties to predict spun yarn strength
obtained from open-end rotor spinning. Fiber properties and yarn count are used as inputs to train the two models and the
output (dependent variable) would be the count-strength-product (CSP) of the yarn. The predictive performances of the two
models are estimated and compared. We found that the ANFIS has a better average prediction successful in comparison with linear
multiple regression model. 相似文献
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在组合式神经网络的故障诊断中,模糊积分是一种对各神经子网的诊断结果进行信息融合的方法,其中需要计算模糊密度。本文首先介绍组合式神经网络故障诊断的思想,给出了基于模糊C均值聚类的模糊划分方法;其次分析一种不可取的模糊密度计算方法,基于模糊粗糙函数,给出计算组合式神经网络重要性的方法;然后,阐述了组合式神经网络的网络训练和诊断方法;最后,用故障模拟数据验证了诊断方法的有效性。 相似文献
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基于轴颈径向振动情况的挤压油膜阻尼器(SFD)长轴承模型,结合Navier-Stokes(N-S)方程,通过推导油膜惯性速度分布,求解并用数值法验证了油膜压力分布模型.模型的分析结果揭示了油膜径向力反演特性,据此提出了SFD同步压力响应设计准则,并分析了满足此准则的SFD设计参数之间的关系,可为深入研究油膜动力特性和SFD-转子系统动态设计奠定基础。 相似文献
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本文试图通过对解转子的应力分析、强度计算、安全系数的选择以及飞裂残骸分析来论述转子裂纹产生原因,并提出预防措施。 相似文献
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基于虚拟样机的锤片式粉碎机转子动力学特性研究 总被引:3,自引:0,他引:3
建立了锤片式粉碎机转子的离散化模型,利用虚拟样机技术对不同锤片排列形式的粉碎机转子进行动力学仿真分析,得到了与实际情况相近的结论。仿真结果表明,锤片交错排列和对称交错排列转子的平衡性较好,其中交错排列转子两端轴承承载情况相近,转子稳定性好。 相似文献
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描述了FD-2风力提水机组的研制过程。该机组采用玻璃钢复合材料作为低速风力机的风轮叶片,安全系统由侧后翼调速调向机构组成,与风力机配套的是手动泵。文中还给出了机组的现场生产考核试验结果。 相似文献