基于CFD技术的喷气织机主喷嘴内部流场的分析

通过对喷气织机主喷嘴现状的分析提出了应用CFD的思路.应用NUMECA软件进行主喷嘴内部流场数值模拟,揭示了导纱管内不同截面上气流速度的分布,并对主喷嘴内部气流的轴向动压和马赫数分布进行了分析.结果表明,利用数值模拟研究主喷嘴流场特性方便、快捷,且精度也较高.     

CONJUGATE CAM WITH FIVE-BAR LINKAGE MECHANISM FOR RAPIER DRIVE OF FLEXIBLE RAPIER LOOMS

A new type of rapier drive for flexible rapier loom through conjugate cams with five-bar linkage mechanism is raised and analyzed. Two designs suitable for the conversion of 1515-190.5 shuttle looms are given as examples. This mechanism can be applied to traditional shuttle looms as well as to new flexible rapier loom design.     

剑杆织机的纬纱交接条件

本文指出在使用双剑杆进行织造的剑杆织机上,如果剑杆的交接冲程设计不当,会出现三类不正常的交接失误现象,即:纬纱松圈,交接不到和交接不稳。在对两剑运动理论分析的基础上,指出名义交接冲程与实际交接冲程的区别,分析了两剑进足的时间差△α对纬纱实际交接冲程的影响,得出了保证纬纱不松圈的交接条件,以及名义交接冲程与△α之间关系的公式。进一步又得出了最大实际交接冲程 L(α)_(max)与 d 和△α的关系式,并指出当 d=2L(α)_(max)时,两剑的总动程最小。本文还推导了纬纱交接时两剑的相对速度 v 与 L(α)_(max)的关系公式,并讨论了如何选择交接点位置的问题。     

RECONSTRUCTION OF AXLE-TREADLE LOOM IN HAN DYNASTY

The axle-treadle mechanism of Han loom consists of a set of components, including two pedals controlling one shaft via a central axle. Based on the new archaeological finds, especially the pottery loom model, the collection of Krishna Riboud, and the historical document, a kind of axle treadle loom with oblique warp frame was reconstructed by author. It might be applied in the central China at that time, especially in Shandong and Jiangsu areas, and it was not later than the Warring State period for the oblique axle treadle loom to come into being and reach a peak in the Han Dynasty. After that time, it was used with the vertical frame but lost the importance gradually.     

浅谈“双林绫绢”生产技艺及花色品种

为完整地研究、整理“双林绫绢”生产技艺和品种发展,作者长期对其工艺实物、织造、练染、上矾生产技艺和品种发展进行实地调查,并反复查阅了《双林镇志》等史料,对其生产的历史进行探讨。调查研究表明:“双林绫绢”生产技艺精湛,品种发展齐全,在我国的绫绢、丝绸生产史上有其特殊地位。本文是一篇较完整的双林绫绢生产和品种发展史料,其中绫绢练染技艺,尤其批床工艺、绫绢品种发展的论述较新。     

喷气织机四连杆打纬机构动态响应的数值解

采用柔性多体系统建模方法建立了喷气织机四连杆打纬机构的微分-代数动力学控制方程组,并将其转化为常微分方程组,采用传统的显式Runge-Kutta法求解,效果较理想。     

近代常州地区棉织业的发展

本文叙述了常州地区棉织业发展的历:从早期的农家副业、个体织户,经手工织布工场、机器织布工厂到大型纺织公司。介绍了在棉织业发展过程中涌现的一批著名厂商和纺织实业家。文中从5个方面分析了常州地区棉织业在近代迅速崛起,发展为仅次于上海,在全国居于第二位的原因。