重型板式给料机动力学仿真及结构强度有限元分析

发布时间：2018-03-18 19:51

本文选题：重型板式给料机　切入点：驱动功率　出处：《吉林大学》2015年硕士论文　论文类型：学位论文

【摘要】：重型板式给料机是金属和非金属矿山物料转载运输自动化的关键设备,其性能直接影响到矿山开采运输的生产效率和安全性。本论文结合国内重型板式给料机研发课题,对其在不同工况下的电机功率、动态性能以及关键零部件的结构强度进行了分析计算。首先,根据链条传动原理,给出了驱动链轮所受总阻力的计算方法,在此基础上得到了驱动链轮在满载和空载工况下运行所需的功率。其次,运用多体动力学软件RecurDyn中的履带模块建立了板式给料机的虚拟样机模型,分析了重型板式给料机在空载和满载启动、稳定运行和制动三个阶段的电机功率,并且与理论计算结果进行对比,进一步验证了理论计算的合理性。然后,建立了驱动轴的刚柔耦合模型,以得到的驱动功率为加载条件,分析了驱动轴在不同工况下的动态强度,提取了危险位置节点应力的实时变化情况,在此基础上评价了驱动轴的可靠性。最后,建立了支架、驱动轴和链板等关键零部件的有限元模型,分析了危险工况下各关键零部件的强度和刚度,另外,对支架进行了模态分析,通过振型得到支架的薄弱部位,为改进设计提供指导。本论文给出的重型板式给料机的电机驱动功率计算方法、虚拟样机动力学仿真以及关键零部件的刚柔耦合模型建立过程和分析方法,为重型板式给料机的设计提供了参考。
[Abstract]:Heavy plate feeder is the key equipment for the automation of material transfer and transportation in metal and non-metal mines, and its performance directly affects the production efficiency and safety of mining and transportation. The motor power, dynamic performance and structural strength of key parts are analyzed and calculated under different working conditions. Firstly, according to the principle of chain transmission, the method of calculating the total resistance of driving sprocket is given. On this basis, the required power of driving sprocket under full load and no-load conditions is obtained. Secondly, the virtual prototype model of plate feeder is established by using the crawler module of multi-body dynamics software RecurDyn. The motor power of heavy-duty plate feeder in the three stages of no-load and full-load start-up, steady operation and braking is analyzed, and compared with the theoretical calculation results, the rationality of the theoretical calculation is further verified. The rigid-flexible coupling model of the driving shaft is established. The dynamic strength of the driving shaft under different working conditions is analyzed with the driving power as the loading condition, and the real-time variation of the node stress at the dangerous position is extracted. On this basis, the reliability of the drive shaft is evaluated. Finally, the finite element model of the key parts, such as the bracket, the drive shaft and the chain plate, is established, and the strength and stiffness of the key parts under dangerous working conditions are analyzed. Modal analysis was carried out to obtain the weak position of the support by vibration mode, which provided guidance for improving the design. In this paper, the calculation method of motor driving power of heavy plate feeder, the dynamic simulation of virtual prototype and the establishment and analysis method of rigid-flexible coupling model of key parts are presented, which provides a reference for the design of heavy plate feeder.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD634

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