重型板式给料机链传动系统静动态特性研究

发布时间：2018-01-17 13:27

本文关键词：重型板式给料机链传动系统静动态特性研究　出处：《大连理工大学》2012年硕士论文　论文类型：学位论文

【摘要】：板式给料机是自移式破碎站的核心组成部件之一,它靠链传动驱动,链传动系统性能好坏对给料机能否平稳安全运行至关重要。由于承受重量可观的物料自重,以及受到电铲落料的冲击作用,板式给料机实际工作过程中振动较严重,同时链节链轮容易破坏。如何评价物料冲击对输送链的影响,研究给料机产生振动的来源,以及探讨给料机链传动系统的动态特性,已经成为现在大型破碎站自主设计过程中迫切需要解决的问题。针对板式给料机振动问题,文章从给料机输送链基本结构特点出发,将链传动系统等效为五杆机构模型,推导了输送物料方向速度波动公式,结果表明链轮齿数、节距对速度波动影响最大,为后续动力学仿真提供理论依据。链条载荷分析是进行后续分析的基础,本文探讨了平稳运输物料和受到物料冲击载荷两种工况下链条拉力的计算方法,分析显示冲击载荷造成链条拉力显著增加。针对输送链受力条件恶劣的驱动轮啮合区域,建立了刚体受力模型和考虑链节伸长量、齿廓间隙、初始压力角等多因素的受力模型,求解了链节之间以及链轮链条的相互作用力,比较了摩擦角等因素对链轮载荷分布的影响,得出摩擦角与链节伸长量的存在,导致滚子与链轮作用力方向以及大小相应改变的结论。通过刚柔混合多体动力学技术,验证了速度波动公式的正确性,仿真求解了给料机链传动系统动态响应情况以及滚子销轴动态应力与应变,分析比较了理论受力模型、刚体模型、柔性体模型在计算啮合区域载荷上的异同,为实际给料机链传动机构设计提供理论参考。
[Abstract]:Since the plate feeder shiftcrusher station core components of it by chain drive, chain drive system performance of feeder can smooth and safe operation is very important. Because of the considerable weight to withstand the weight of materials, and by the impact of falling shovel material, plate feeder in actual work process of vibration is serious, and the chain sprocket easy to destroy. How to evaluate the material impact on the effect of the conveyor chain, on feeder vibration source, and the dynamic characteristics of feeder chain drive system, has now become an urgent need to solve the large-scale crushing station independently in the process of design.
Aiming at the vibration problem of plate feeder, the feeder conveyor chain the basic structure of the equivalent transmission chain five bar mechanism model, deduces the conveying direction of the speed fluctuation formula. The results show that the number of teeth, the pitch of the greatest impact on the speed fluctuation for the subsequent dynamic simulation provides a theoretical basis.
The chain load analysis is the basis for the subsequent analysis, this paper discusses the smooth transportation of materials and materials under impact load under two conditions of chain tension calculation method, analysis shows that the impact load caused by the force of chain increased significantly. The driving wheel meshing area conveying chain force in severe conditions, establish the rigid force model and considering the chain elongation the amount of stress, tooth gap, multi factor model of initial pressure angle, the link between the solution and the sprocket chain interaction, comparison of friction angle and other factors on the effect of wheel load distribution, the friction angle and chain elongation, resulting in roller and sprocket force direction and change the size of the corresponding conclusion.
The rigid flexible multi-body dynamics technique, to verify the correctness of the velocity fluctuation formula, simulation for feeder chain drive system dynamic response and roller pin dynamic stress and strain analysis, comparing the theoretical stress model, rigid model, flexible model in the calculation of load on the similarities and differences between the meshing area, and provide a theoretical reference for the actual design of feeder chain drive mechanism.

【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH237.1

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