滚子链传动噪声的发生过程

本文主要对滚子链传动噪声的发生过程、发生部位及其特点进行分析及研究,重点阐述通过试验所得出的一些结果及有关的分析结论,希望为控制滚子链传动噪声提供一些理论上的依据。     

计算机辅助套筒滚子链传动方案求优设计

<正> 文献[1]提出了计算机辅助方案求优的设计方法,并以三角带传动为例说明其设计要点。在通用机械零件的设计中,从理论与实践上已揭示了其参数优选的原则与范围(如三角带传动其型号选择有选型图,圆周速度范围以取v=20～30m/s为宜。),且实际上对设计影响较大的主要参数一般仅1～2     

提高套筒滚子链传动疲劳寿命的优化设计

本文以套筒滚子链传动疲劳寿命为目标函数,对其传统参数的优化设计进行了探讨,通过实例设计,证实了本方法的优越性。     

大行程机械臂系统滚子链传动特性研究

针对目前机械臂传动系统设计制造成本较高,在一般简易场合使用局限等问题,给出一种基于滚子链传动的新型机械臂系统,并针对系统关键部件滚子链传动系统,通过运用多体动力学理论和拉格朗日方法,分析得到机械臂系统滚子链传动横向振动模态特性。研究结果表明:通过对比大行程滚子链传动与非滚子链传动机械臂运行特性,本模型所提出的具有制造成本较低新型机械臂系统方案可以较好地解决一般简易场合使用传统机械臂使用局限的问题;在理想轨迹下滚子链传动与非滚子链传动机械臂运行特性差异较小,满足一般对操作精度要求不高的机械臂使用要求;链传动横向振动各阶固有频率随着链长的增长而减小,传动速度对链传动横向振动影响较小,链条张力对链传动横向振动影响呈现线性变化关系,随着张力的增加固有频率也逐渐增加。     

滚子链传动的横向振动

本文提出了滚子链传动横向振动的力学模型，建立了横向振动的激励ｑ（ｘ，ｔ）和各阶模态下的固有频率计算式，推演了在激励ｑ（ｘ，ｔ）作用下的动态响应。     

滚子链传动振动特性的研究

提出了滚子链传动的横向振动新模型，依据新模型导出了滚子链传动时横向动力响应的表达式     

滚子链传动的振动特性分析

链传动是一种重要的机械传动方式,但它受振动的影响很大.本文讨论链传动的振动的主要类型和引起振动的主要原因.     

滚子链传动垂度计算的新抛物线法

本文指出了现有垂度计算抛物线法的不足,介绍一种新的抛物线法,该方法计算过程简单,计算精度高。     

MATLAB在链传动设计中的应用

利用MATLAB软件的强大数值计算和图形界面（GUI）可视化功能,对套筒滚子链进行传动设计,可以有效地缩短设计时间、提高工作效率。本文将在此环境下探索链传动设计这一新的方法。     

套筒滚子链传动的优化设计

套筒滚子链传动是机械中最常用的传动形式之一。因此,采用优化设计方法使链传动的设计更为合理是有意义的。对于链速V>0.6m/s且润滑良好的链传动,可从极限功率曲线图中由小链轮转速n_1直接查出每一链号的单排链在特定条件下所能传递的最大功率     

链传动中纵向振动问题的研究

利用多自由度系统的振动理论研究了链条的纵向振动问题,在对滚子链纵向振动问题建立力学模型的基础上,推导了链条的纵向振动方程式,给出了计算固有频率的公式及主模态的计算方法,并且提出了防止链传动中链条共振的几种措施。     

新齿滚子链传动设计及动态特性分析

针对链传动中链条及链边振动较大、链条铰链磨损等动态问题,设计一种新齿滚子链传动,建立滚子链及新齿滚子链啮合传动模型,并对链传动动态特性进行仿真分析,研究了链传动在不同转速下啮合冲击力、不均匀系数、摩擦力和链传动横向振动的变化规律。研究结果表明:随着转速的增加,链传动过程中的啮合冲击力、链波动均增加,不均匀系数、摩擦力均减小;在转速小于6000r/min时,链传动横向振动较小,当转速大于6000r/min时,链传动横向振动急剧增加;新齿滚子链传动比标准滚子链传动的啮合冲击力、摩擦力小,传动平稳性好。     

Clearance Influence on Dynamic Response of Intermittent Roller Chain Drive

The clearances appear in chain link hinges induced by manufacturing tolerance or wear of components are the most important factor that influences the dynamic performance of the intermittent roller chain drives.Due to the existence of the clearances in chain link hinges,the serious impact vibration phenomenon which influences the stability and the position accuracy of the chain drive system would be caused in the intermittent motion.But,the problem may be that a reasonable modeling on the chain with clearances is difficult due to the large clearance's number in chain system and the fact that the clearance' size are different.Currently,the studies on the dynamics of the intermittent roller chain considering the multi-clearance' joints are rare.Most research works have only focused on the constant moving chains.Taking the intermittent roller chain system as an object,this paper designs and builds the experimental device of this kind of mechanical system.The Longitudinal vibration response of the intermittent chain under the different motion laws was tested.The experimental study shows that the clearances presented in chain link hinges can cause severe impact vibration in the intermittent motion of chain.In subsequent work,the dynamic model of the intermittent roller chain system with the multi-clearance' joints was established.By calculating the dynamic response of this kind of mechanical system under the different motion laws,the effect of the clearances on the dynamic response of the intermittent chain drive system was analyzed.The theoretical simulation shows that the serious impact vibration phenomenon of the chain system can be caused by the clearances at the start accelerating period,and the chain drive system is often accompanied by the severe shock and vibration at the moment that the chain moves from the acceleration period to deceleration period.The research conclusions made by the experimental and theoretical studies indicate that the use of motion laws with small and continuous jerk at conversion point can effectively suppress the impact vibration at this point caused by clearances' effect.Additionally,the use of nonsymmetrical motion laws with small jerk approaching the end of the indexing period can obtain a smaller residual vibration.The presented motion law can provide an important reference for the improvement of the dynamic performance of the intermittent chain drive systems.     

滚子链传动横向振动稳定性分析

基于多体动力学理论,建立了滚子链传动系统横向振动动力学模型。该模型考虑了链条张力及链节转动惯性对链系统横向振动的影响。在此基础上,通过算例仿真,对滚子链系统横向振动固有特性进行了研究,并分析了不同边界激励条件对滚子链传动系统横向振动稳定性的影响。研究结论可为指导各种含链传动系统的机械装置的动态分析与设计提供借鉴。     

新型无套筒滚子链的设计

介绍了无套筒滚子链的结构特征及特点,概述其抗疲劳性及结构对耐磨性的影响,并分别与套筒滚子链作了对比。     

滚柱式超环面行星蜗杆传动弹流润滑研究

给出了滚柱式超环面行星蜗杆传动转子蜗杆和定子螺旋面上载荷分布及其与滚柱之间最小油膜厚度计算公式.分析了弹流润滑的影响因素和影响规律,为该种传动的设计与制造提供了理论依据.     

Dynamic Modeling of a Roller Chain Drive System Considering the Flexibility of Input Shaft

Roller chain drives are widely used in various high-speed, high-load and power transmission applications, but their complex dynamic behavior is not well researched. Most studies were only focused on the analysis of the vibration of chain tight span, and in these models, many factors are neglected. In this paper, a mathematical model is developed to calculate the dynamic response of a roller chain drive working at constant or variable speed condition. In the model, the complete chain transmission with two sprockets and the necessary tight and slack spans is used. The effect of the flexibility of input shaft on dynamic response of the chain system is taken into account, as well as the elastic deformation in the chain, the inertial forces, the gravity and the torque on driven shaft. The nonlinear equations of movement are derived from using Lagrange equations and solved numerically. Given the center distance and the two initial position angles of teeth on driving and driven sprockets corresponding to the first seating roller on each side of the tight span, dynamics of any roller chain drive with two sprockets and two spans can be analyzed by the procedure. Finally, a numerical example is given and the validity of the procedure developed is demonstrated by analyzing the dynamic behavior of a typical roller chain drive. The model can well simulate the transverse and longitudinal vibration of the chain spans and the torsional vibration of the sprockets. This study can provide an effective method for the analysis of the dynamic characteristics of all the chain drive systems.     

控冷辊道中链条张紧装置的应用

介绍了高速线材轧机机组中,控冷辊道的工作情况和性能特点,并重点介绍了张紧装置在链轮、链条、集中传动中的实际应用。     

基于虚拟样机技术的步进链传动系统动力学仿真研究

以步进链传动系统为研究对象,分析了该类系统的动力学特性及影响因素,构建了步进链传动系统虚拟样机模型,分析了该类系统采用不同步进运动规律及在不同预紧力状态下动力学特性的变化规律。通过计算机仿真,验证了虚拟样机模型的合理性与正确性,研究结果可为以链传动为执行机构的一类步进传动系统的动力学分析与设计提供借鉴。