新型正铲挖掘机工作装置的动态特性分析

发布时间：2018-01-14 04:26

本文关键词：新型正铲挖掘机工作装置的动态特性分析　出处：《燕山大学》2016年硕士论文　论文类型：学位论文

【摘要】：正铲液压挖掘机以其承载能力大,作业效率高等优点,广泛应用于工业和民用建筑、交通建设、基础设施建设。它的运动性能、挖掘力的发挥状况、动力学性能、使用寿命都会影响作业进度和成本。挖掘机的工作装置作为完成挖掘、提升和装载任务的核心部件,它的结构特点决定着挖掘机的工作性能,因此对挖掘机工作装置进行动态特性研究十分重要。国内对正铲工作装置构型的研究较少,缺乏自主知识产权的构型。因此,本文基于一种新型的正铲液压挖掘机工作装置,对其进行了动态特性分析。本文首先基于D-H法进行了运动学求解,得到位置正反解,速度和加速度的正解,并对工作装置的运动性能做了综合的研究。进行了液压缸理论挖掘力和整机理论挖掘力分析,运用图谱叠加法绘制了挖掘图谱。通过经验公式计算了挖掘阻力,并对其方向进行研究。然后运用Kane-Huston法对新型正铲液压挖掘机的工作装置进行动力学分析,并绘制三组驱动缸完成一个典型挖掘、提升过程的驱动力变化曲线。通过虚拟样机软件ADAMS对工作装置进行了动力学仿真,并与Kane-Huston法计算结果进行对比、验证。最后采用ADAMS和ANSYS的联合仿真技术,建立新型正铲液压挖掘机工作装置的刚柔耦合模型,并分析了在一个典型的挖掘、提升过程下工作装置的动态强度和有冲击载荷挖掘条件下工作装置的动态强度。
[Abstract]:The hydraulic excavator is widely used in industrial and civil construction, traffic construction, infrastructure construction, its movement performance and the exertion of excavating force due to its advantages such as large bearing capacity and high working efficiency. Dynamic performance, service life will affect the progress and cost of the operation. Excavator working device as the core component to complete the excavation, lifting and loading tasks, its structural characteristics determine the working performance of the excavator. Therefore, it is very important to study the dynamic characteristics of excavator working device. In this paper, the dynamic characteristics of a new type of hydraulic excavator with forward shovel are analyzed. Firstly, the kinematics solution based on D-H method is carried out, and the forward solutions of position, velocity and acceleration are obtained. The movement performance of the working device is studied synthetically. The hydraulic cylinder theoretical excavating force and the whole machine theoretical excavating force are analyzed, the mining map is drawn by the method of map superposition, and the excavation resistance is calculated by empirical formula. Then the dynamic analysis of the working device of the new type forward shovel hydraulic excavator is carried out by using Kane-Huston method, and three groups of driving cylinders are drawn to complete a typical excavation. The driving force curve of the lifting process is simulated by the virtual prototyping software ADAMS, and the results are compared with those of the Kane-Huston method. Finally, the rigid-flexible coupling model of the new type forward shovel hydraulic excavator working device is established by using the joint simulation technology of ADAMS and ANSYS, and a typical excavating model is analyzed. The dynamic strength of the working device under the lifting process and the dynamic strength of the working device under the condition of impact load mining.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TU621

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