正置空间曲柄摇杆剑杆引纬机构的分析研究

通过对典型的正置空间曲柄摇杆引纬机构的运动学和动力学分析,研究了在摇杆最大摆角和输出杆长度取不同的值时输出杆的运动和结构压力角变化规律,选出了能满足传动性能要求的较佳机构参数。同时指出机构尚存在的有待进一步研究的问题。     

剑杆引纬连杆机构的创新分析与设计研究

通过对典型剑杆织机传剑机构的运动弹性动力学研究,概括地提出了较理想引纬传动方案所应具备的主要性能特点,由此可创新设计出一种具有复合运动的全转动副空间连杆引纬机构.     

An Optimization Design of a Weft Insertion Mechanism for Rapier Looms

By analyzing a combined and spatial 6-bar linkage weft insertion mechanism, its practical model for optimization design is set up and the modification of penalty strategy is put forward so that the genetic algorithm can be better used in optimization design for mechanisms with non-linear constraints. The design result is discussed.     

Reverse Design and Test of Non-circular Gear ＆ Crank-Rocker ＆ Gear Trains Weft Insertion Mechanism

For the purpose of obtaining satisfactory performance of the non-circular gear & crank-rocker & gear trains (NCCRG) weft insertion mechanism which was proposed in this paper,the ideal kinematic curve of this weft insertion mechanism was given,and the reverse solution models of this mechanism were established.A reverse design and simulation software was compiled based on Visual Basic 6.0 to obtain the mechanism parameters,including the pitch curves and tooth profiles of the non-circular gears.A test-bed of this mechanism was developed according to these parameters.The kinematic performance of this weft insertion mechanism was tested by high-speed video tape recorder with its corresponding video analytical software Blaster's MAS.And the test results were identical with the theoretical calculation.Compared with the conjugate cam weft insertion mechanism which is applied on TT96 rapier loom,under the condition of same weft insertion rate,the variation of acceleration of this mechanism is smaller.This novel weft insertion mechanism can meet the requirements of weft insertion on rapier looms with smooth and steady motion.     

GA74型剑杆织机改造中引纬机构的优化设计

GA74型剑杆织机由于其筘座脚长和钢筘摆幅大,故其速度不能有效地提高,这里给出了改造后的引纬机构,并用优化设计的方法,在满足织机的工艺条件和运动性能等约束条件的基础上,获得了设计方案的一组较理想的参数.     

用于剑杆织机的一种非对称梭口的多臂

直至今日在我国所有生产和进口的多臂属于对称梭口。但现在不少剑杆织机用钢带或碳纤编织成的剑带引纬,剑头往往贴着走梭板下层经纱运动,实际需要一种非对称的多臂机。提出了一种非对称梭口即可满足这类需要。     

关于有梭织机改造成剑杆织机的问题

提出了当前我国从有梭织机改造成的、大量生产的剑杆织机有待进一步改造的问题。提出了适当缩短筘座脚以及钢筘的摆幅的必要性及可能性,并介绍了这种进一步改造方案的具体设计方法,敌对此类剑杆织机的改造具有普遍的指导意义。     

多梭口织机入纬率研究

对影响织机入纬率的诸多因素进行分析，表明对于使用梭子或栽纬器的所有织机(如：传统有梭织机，片梭机和多相织机)来说，影响因素基本上是相同的，一台织机的相数由同时引入纬纱的梭子或载纬器平均数决定，它表明多相织机是以高的相位数来补偿其较低的梭子飞行速度，本通过对多相织机与多梭口织机关系和影响入纬率与投梭时期参数的分析得知，提高梭子的飞行速度和适当增加“相数”都能获得高的入纬率，这里适当增加“相数”和多相织机的相数不同，它是通过将梭口和打纬机构分开成几个部分取得的，这样做还可以避免在现有多相织机中产生的许多纺织与工程上的问题。     

剑杆织机引剑机构动力学研究

以双相剑杆织机引剑机构为例,按动力学模型用传递矩阵法分别以集中质量和连续系统导出了相应的扭振轴系动力学方程,并在此基础上应用拉格朗日方程按连续系统导出轴盘扭振系统的振动动力学方程。     

Kinematic Modeling and Characteristic Analysis of Eccentric Conjugate Non- circular Gear ＆ Crank-Rocker ＆ Gears Train Weft Insertion Mechanism

A novel weft insertion mechanism named eccentric conjugate non-circular gear & crank-rocker & gears train weft insertion mechanism was proposed in order to better meet the requirements of rapier loom’s weft insertion mechanism as well as reduce the manufacturing difficulty. Meanwhile, based on the working principle of this mechanism, kinematical mathematic models of this mechanism were established and an aided analysis and simulation software was compiled. The influences of eccentricity ratio, deformation coefficient, and other important parameters on the kinematics characteristics of this mechanism were analyzed by using the software. A group of preferable parameters which could meet the requirements of weft insertion technology were obtained by means of human-computer interactive optimization method. The maximum velocity, maximum acceleration, and variation of acceleration of this mechanism are smaller than those of the conjugate cam weft insertion mechanism applied on TT96 rapier loom under the conditions of the same unilateral total stroke of rapier head and the same rotary speed of loom spindle; meanwhile the other demands of weaving technology can be met by this novel weft insertion mechanism.     

The Propulsive Force of the Water-jet to the Flying Weft in Water-jet Looms

The property of the water-jet studiedinliterature[1],including the influence of water-jet parameters on waterjet,such as the relationship between the water pressure inthe nozzle and the speed of the water jet,the relationshipbetween the displacement of the plunger and the speed ofwater jet with respect to the different spring constants,therelationship betweenthe speed of water jet and the jet ti mewith respect to the different plunger stroke,therelationship between the plunger s cross-sectional…     

储纬器定长方法的探讨

文章分析了IWF8407和ROJ—Elf两种储纬器的定长方法 ,提出了在不改变储纬鼓直径条件下提高引纬定长精度的三种方法 ,可供开发设计新型储纬器时参考。     

剑杆机冲击隔振器参数优化设计

针对机械设备受周期冲击干扰的积极隔振问题,提出了冲击隔振参数优化设计的新方法。通过对隔振系统的机械阻抗分析,提出由试验分析识别复杂设备干扰力源的方法,为各类隔振工程设计问题提供了简捷、有效的途径。计算机仿真结果证明了上述设计思想和试验方法的正确性和可行性。文末给出了这种方法成功地应用于大面积剑杆式织机上楼的冲击隔振的实例。     

从机架扰力分析试论普及型剑杆织机的再改造

在前文中提出现有普及型剑杆织机有关适当缩短筘座脚和钢筘摆幅的可能性,但这种改造的后果如何?关键问题是改造后的织机所受的扰力是否得到减小.这里讨论了这个问题,并阐明其结果,答案是肯定的.     

Simulation and Analysis of Spatial Weft Insertion Mechanism Considering Flexibility and Clearance

A 3D model of the spatial four-bar weft insertion mechanism was built with unigraphics NX(UG) according to the actual requirement,and dynamics simulation was carried out by importing the model into ADAMS.Without considering the clearance,the motion characteristic curve of the sword belt was generated through ADAMS combined with MATLAB.In this paper the hinge between the rod and the sector gear was selected as an example with different values of clearance,outputting the motion characteristic curve of the sword belt.Finite element analysis(FEA)was conducted,the flexible body was generated by importing the forked frame into ANSYS,and flexible dynamics simulation was carried out by importing the flexible body into ADAMS to replace the rigid rod.A comprehensive comparison of the output characteristics of the sword belt was conducted in the consideration of the clearance or flexible.Analysis of the force on the left hinge of the rod was carried out with the ADAMS post processing module.With the same clearance,considering the flexibility,amplitude of fluctuation of the force on the hinge increased obviously.     

Dynamics of Water Jet in Water Jet Looms

On the base of the study on dynamics of water jet in water jet looms, the parameters of water jet mechanism which affect the speed of water jet are analyzed and optimized. So the stability of the water jet can be improved to raise the speed of water jet as well as weft insertion rate and to enlarge the width of woven fabrics a lot. At the same time it also points out that to increase water jet speed and to prolong its affective jet tune depend mainly on the accretion of spring rate (constant) of stiffness and the diminution of plunger's cross-sectional area respectively.     

挠性剑杆织机电控箱原理与现状

着重讨论了挠性剑杆织机电控箱原理、主要功能、关键技术及生产现状。针对我省纺织企业压锭改造的情况，开发无梭织机控制技术及推广应用，意义重大。     

喷水织机喷水动力学分析研究

通过对喷水织机喷水动力学的研究,分析出影响射水流速度大小的喷水机构参数并进行优化,以进一步提高射流的稳定性,提高喷水引纬的速度和适当扩大织幅,同时指出主要通过增大弹簧刚度（常数）和减小柱塞面积来提高喷水速度及增长有放喷水时间。     

空间机构运动分析的正交螺旋法

本文用正交螺旋法对一个自由度单环空间机构的运动进行了分析,导出其速度、加速度的度算公式,并对输入构件为连杆和不同运动副的组合进行了讨论,最后以具有三平行轴的七杆空间机构为例作了数字计算。     

Study on the Back Rest System of Looms

Periodic variations of warp tension during a weaving cycle result in corresponding change of back rest position, and the oscillation of back rest affects the fluctuation of warp yarn in return. A mechanical model of back rest system of looms is presented on basis of auto control theory, and the factors affecting the dynamic performance of the back rest are analyzed. In the model, warp yarn is regarded as a viscoelastic medium, and the adjustable parameters and the adjusting range of the back rest system are increased, so the loom's applicability for the fabric's variety is enhanced. Finally, the methods of designing and adjusting the back rest are discussed, and a trend of back rest system development is given.