数控转塔冲床主传动的发展

对数控转塔冲床主传动部件的发展历程进行了综述,并分析了三种传动方式的优劣。提出将交流伺服控制系统用于数控转塔冲床,采用大规模集成化技术及智能化功率模块,实现对交流伺服的位置环、速度环和电流环的全数字化控制,提高冲床的加工精度及效率。     

车辆动力传动系的耦合与匹配研究

阐述产品设计耦舍与匹配的概念，提出了车辆动力传动系统匹配的基本内容。包括结构布置、性能、控制和强刚度等4类匹配。以栽重汽车传动系各挡传动比分配为应用示例，建立优化数学模型并求解，得出比原车性能更好的传动比分配结果。     

STRATEGIES FOR SOLVING KEY PROBLEMS IN RESEARCH AND DEVELOPMENT OF AUTOMOTIVE CONTINUOUSLY VARIABLE TRANSMISSION

ＳＴＲＡＴＥＧＩＥＳＦＯＲＳＯＬＶＩＮＧＫＥＹＰＲＯＢＬＥＭＳＩＮＲＥＳＥＡＲＣＨＡＮＤＤＥＶＥＬＯＰＭＥＮＴＯＦＡＵＴＯＭＯＴＩＶＥＣＯＮＴＩＮＵＯＵＳＬＹＶＡＲＩＡＢＬＥＴＲＡＮＳＭＩＳＳＩＯＮ①ＨｕａｎｇＸｉａｎｇｄｏｎｇＹａｎｙｕＬｉｎＢｉｎ...     

基于多因素修正的台风灾害下输电线路失效预测方法

台风灾害是导致沿海地区输电线路倒塔(杆)、断线等线路损毁的主要原因之一。为了提高电网抵御台风的能力,进行台风灾害下输电线路失效预测具有重要意义。为此文中将输电线路看做由杆塔和线路共同组成的塔线系统,提出了一种基于多因素修正的台风灾害下输电线路塔线系统的失效预测方法。该方法结合传统的风荷载受力模型以及多因素分析的数据挖掘技术,分为基于模型驱动和基于数据驱动2个部分。模型驱动部分考虑杆塔和输电线路实际风荷载及设计风荷载的物理力学模型;数据驱动部分考虑电网信息、气象信息、地理信息等多因素信息,通过对历次台风灾害下的样本数据进行数据挖掘分析,结合当前预测信息,求取修正系数对模型驱动结果加以修正,进而获得输电线路塔线系统的综合失效概率,并对其进行可视化处理。最后通过算例分析验证了所提方法的科学性及有效性。     

Dislocation identification and in situ straining in the spinodal Fe30Ni20Mn25Al25 alloy

Dislocations in the spinodal alloy Fe(30)Ni(20)Mn(25)Al(25), which is composed of alternating BCC and B2 (ordered BCC) phases, have been investigated using weak-beam transmission electron microscopy (TEM). The alloy was compressed at room temperature in an as-hot-extruded state to strains of approximately 3% for post-mortem dislocation analysis. Dislocations with a/2<111> Burgers vectors were found to glide in pairs on both {110} and {112} slip planes. TEM in situ straining experiments were also performed on both the as-extruded alloy and an arc-melted alloy. The in situ straining observations confirmed that dislocations were able to pass between both spinodal phases. Partial dislocation separations were relatively wide in the BCC phase and narrow in the B2 phase. Dislocation glide, as opposed to twinning (both of which have been observed in other BCC-based spinodals), was also found to be the only room temperature deformation mechanism.     

新型牵引-制动型液力变矩减速器原始特性计算

液力变矩器的原始特性能够确切地表示液力变矩器的基本性能,而且通过计算方法可以获得几何相似的系列变矩器的外特性或通用特性。对设计牵引-制动型液力变矩减速器具有一定的指导意义。这里基于束流理论建立了某新型牵引-制动型液力变矩器原始特性参数的计算数学模型。得出了该牵引-制动型液力变矩减速器的变矩工矿原始特性参数曲线。     

车辆串联混合传动中二次调节系统的节能制动

建立了采用二次调节静液传动技术的车辆串联混合传动系统的数学模型，分析了以恒扭矩制动和恒功率制动回收车辆惯性能的特点，以满载的天津三峰牌TJ6481A型车辆作为对象进行了恒扭矩、恒功率制动的仿真研究，并在模拟实验台上进行了模拟实验，从车辆的制动可靠性和乘坐舒适性两方面对这两种制动方法的可应用性进行了分析。     

农用机械液压传动装置总成

本文介绍联合收割机等农业机械所用静液压传动装置(HST)及所配变速装置的结构、规格、参数.     

Design, manufacture and evaluation of a new and simple mechanism for transmission of power between intersecting shafts up to 135 degrees (Persian Joint)

This paper introduces a new mechanism which is designed for the transmission of power between two intersecting shafts. The mechanism consists of one drive shaft and one driven shaft, six guide arms, and three connecting arms. The intersecting angle between the input shaft and the output shaft can be varied up to 135° while the velocity ratio between the two shafts remains constant. The research also includes a kinematic analysis and a simulation using Visual NASTRAN, Autodesk Inventor Dynamic and COSMOS Motion. The softwares showed that this mechanism can transmit constant velocity ratios at all angles between two shafts. By comparing the graphs of analytical analysis and simulation analysis, validity of equations was proved. Finally, by fabrication and evaluation of the mechanism it was shown that this mechanism can transmit constant velocity practically.     

功率分流式封闭行星减速器的设计研究

本文较详细地讨论了功率分流式封闭行星齿轮减速器的设计计算，文中阐述了该封闭传动的特点， 比计算，受力分析和效率计算，同时还研究报其封闭功率和功率分流等问题，因此，本文对于同类型的封闭行星减速器的设计工作具有较重要的指导意义。