DYNAMIC PROBLEMS OF WATER JET FOR WEFT INSERTION

In recent years, China has imported thousands of water jet looms. In order to master thetechniques and to develop the variety of products, the dynamic problems of this jet device hasbeen discussed in this paper briefly. It contains 1. Introducing the rotary plunger pumps and the open-type jet nozzles. 2. Establishing the fundamental equations of the dynamic analysis for water jet device. 3. An illustrating example to show the jet speed, and the rate and time duration for the jetflow varies with different pipe resistance, cross section area of the nozzle outlet, and the springcompressive deflection etc. It is useful for research and production references.     

新型织机造型设计特点分析

分析了我国目前织机造型设计的现状以及存在的主要问题，并分析了新型织机的造型设计特点，为设计出生产者和使用者都满意的外观造型提供理论依据     

无梭织带机消极式送经机构的工作特性分析

现代无梭织带机广泛采用受控消极式送经机构,该机构结构简单,设置灵活,且具有一定的张力自调功能。本文运用自动控制原理分析该送经机构的动态工作特性,揭示了经纱张力的自调机理,探讨了干扰和工艺过程对系统动态特性的影响。本文还分析该送经机构的静态工作特性,分析结论对于织带机的工艺调整具有一定的指导意义。     

挠性剑带在剑箱中的变形

本文将挠性剑杆织机中挠性剑带在剑箱中的变形问题,简化为在端部受到一个集中力作用的悬臂梁的变形问题,并且求解出它的挠曲线。进而分析了剑带与剑箱的接触情况,解答了挠性剑带上矩形孔两边的磨损不均匀的现象。     

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。     

The kinematic Design of Beating - up Mechanism for Water - jet Loom Series Modified from Air - jet Loom

For Toyoda looms with air-jet weft insertion,the beat-ing-up mechanisms together with those of Tsudakomawater-jet looms are analyzed.Then by changing thecrank length of the four-bar-linkage for the air-jetlooms to get four specifications of reed travel correspond-ing to the series of Tsudakoma water-jet looms,it canbe proved by comparisons of displacements,velocities,accelerations and transmission pressure angles that thosetwo series of mechanisms have very similar kinematicproperties.So the possibility of developing a series of wa-ter-jet looms modified from Toyoda air-jet looms isproved.It is beneficial to save the machine cost andbroaden the machine types.     

声强分布图法在有梭织机噪声源识别中的应用

本文利用声强的指向特性对有梭织机进行了噪声源识别,用BK3360声强测量系统对1511M有梭织机进行声强测试,测得织权朋面与顶面的声强分布圈,综合分析此分布图得出结论:有梭织机梭箱部位的撞击噪声是有梭织机的主要噪声源。     

织机剑杆运动规律的设计

本文提出了一种带有等速运动的改进梯形加速运动规律,用于凸轮传动的剑杆运动。该运动规律可满足剑杆进、出梭口的时间以及进剑运动时间长短不等于退剑运动时间长短的要求。同时该运动规律可降低剑杆的最大加速度,并使跃度连续无突变,克服跃度为无穷大的现象。     

双相剑杆织机开口、打纬、引剑运动配合的分析研究

针对双相剑杆织机特点,在考虑单台织机运动配合的基础上,同时考虑左、右手二台织机的协调性,对其开口、打纬、引剑运动的协调配合进行了分析研究,并由此确定了有关参数,得以保证双相剑杆织机的正常运行。     

Study of Water Jet Impulse in Water-Jet Looms

The capability of water-jet weft insertion of water-jetlooms is a main index of water-jet looms perfor mance .Inthe literature[1], the collecting ability of the water-jet ,tested by the volume of the jet water collected, was adopt-ed to study the collecting ability of the water-jet weft inser-tion,andinthe literature[2 3],the speed of water-jet at thenozzle exit and the traction force of the water-jet to theweft were studied.In fact ,in the development of the wa-ter-jet flow flying through the…