共查询到19条相似文献,搜索用时 93 毫秒
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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。 相似文献
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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。 相似文献
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基于多体动力学理论,建立了带弹性撑紧装置的滚子链传动系统横向振动动力学模型.模型中将撑紧装置简化为一个导轨,导轨一侧具有弹性支撑,另一侧与多个链节接触.通过算例仿真,分析了弹性撑紧装置对抑制链传动横向振动所发挥的重要作用. 相似文献
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滚子链传动的横向振动 总被引:1,自引:0,他引:1
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。 相似文献
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提出一种类似齿轮传动而非齿轮传动的新型滚子链传动方式.该新型滚子链传动方式设计简单、取材方便,制造、维修成本低,安装精度要求不高,经济便宜.融合了传统滚子链传动和齿轮传动的大部分优点,可用于搅拌滚筒、干燥滚筒、物料输送等非标单件生产场合,有一定的推广价值,该滚子链传动的新方式的提出可以为机械设计和机械维修提供参考和技术... 相似文献
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Dynamic Modeling of a Roller Chain Drive System Considering the Flexibility of Input Shaft 总被引:1,自引:0,他引:1
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. 相似文献
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《机械工程学报(英文版)》2010,(6)
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. 相似文献
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对影响过山车轨道横向倾角的相关因素进行了讨论,建立了车体质心点的空间轨迹模型和车体某时刻的加速度模型,运用牛顿定律详细分析计算过山车复杂空间轨道横向倾角,为过山车空间轨道的设计提供了依据. 相似文献
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棒材砂轮倒棱机输送机构目前均采用螺旋进给机构,但螺旋进给机构在大规格棒材生产中存在螺旋辊不同步,造成圆钢进给速度不均匀,影响倒棱质量的缺点.为此,设计了一种高效柔性进给机构,该机构传动机构简单,应用变频调速技术,匹配棒材进给、横移、旋转三个工艺动作,达到设备造价低,工作可靠、维护简单、提高生产效率的目的,实现了高质量倒棱的连续生产. 相似文献
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过山车虚拟样机的建模与动态仿真分析 总被引:7,自引:0,他引:7
研究基于虚拟样机技术的过山车动力学仿真分析。解决了虚拟样机建模的关键技术问题,例如,过山车轨道和车辆建模、车辆与轨道间的约束,施加摩擦力、根据测控信号自动施加车辆制动力等,建立了过山车系统虚拟样机。利用ADAMS软件对过山车虚拟样机进行动力学仿真分析,研究了运行过程中车辆位置、速度、加速度和受力的变化情况,获得了过山车的各种动态性能,为过山车设计和性能评价提供了一种新手段。 相似文献
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以模块化设计思想为指导,以VisualBasic为开发工具,对AutoCAD软件进行二次开发,研制出了用户界面友好的滚子链传动的计算机辅助设计系统。该系统能实现滚子链传动设计与校核的自动化、绘图的自动化,并能实现了设计与绘图的一体化。 相似文献