【作者】 王飞；

【导师】 牟德君； 丁栋；

【作者基本信息】 燕山大学 ， 机械工程， 2014， 硕士

【摘要】 液压挖掘机是一种多功能机械，被广泛应用于水利工程，交通运输，电力工程和矿山采掘等机械施工中。它在减轻繁重的体力劳动，保证工程质量，加快建设速度以及提高劳动生产率等方面起着十分重要的作用。液压挖掘机具有多品种，多功能，高质量及高效率等特点，因此受到了广大施工作业单位的青睐。本文对一种新型动臂间接驱动的正铲液压挖掘机进行了结构的设计和优化，使其结构和力学性能得以提高。从正铲液压挖掘机工作装置的组成及工作特点出发，参考美国特雷克斯公司RH40E型正铲挖掘机并根据挖掘机行业经验系数，初步确定挖掘机的参数值，其中包括动臂、斗杆和铲斗机构相关的几何参数以及挖掘机的主要工作尺寸。用MATLAB软件对机构进行建模并仿真获得挖掘机的挖掘轨迹包络图，根据包络图求得挖掘机初始尺寸下的主要工作尺寸。基于挖掘机斗杆缸单独挖掘过程、铲斗缸单独挖掘过程以及满斗提升过程运用遗传算法对操作装置进行优化，优化后动臂转角和斗杆转角范围增大，输出相同挖掘力时斗杆缸和铲斗缸所提供的最大推力减小，满斗提升过程动臂缸所需提供的推力减小。文章基于SolidWorks软件根据初始尺寸建立虚拟样机，利用ADAMS软件对斗杆缸单独挖掘过程、铲斗缸单独挖掘过程和满斗提升过程进行动力学仿真，用MATLAB软件进行挖掘轨迹包络图的绘制，并采用遗传算法对液压挖掘机的铰点位置进行优化。更多还原

【Abstract】 Hydraulic excavator is a kind of multi-functional machine and it is widely usedin water conservancy engineering, transportation, power engineering and mining inthe mechanical execution.It plays a very important rolein relieving the heavy manuallabor, ensuring the engineering quality, speeding up the construction speed andimproving labor productivity. Since the hydraulic excavator has the character ofvarieties, multi-function, high quality and high efficiency etc, it got the favour of theconstruction units. In this paper, the structure of a new type of face-shovel hydraulicexcavatorwith indirect-drive boom is designed and optimized in order to improve thestructure and mechanical properties.According to the equipment constitute and work characteristics of face-shovelhydraulic excavator,the Terex RH40E face-shovel hydraulic excavatorand theempirical coefficient of excavator industry, the parameter values of the excavator istentatively determined, including the related geometrical parameterof the boom, thestick and the bucket and the main working dimension. With the MATLABsoftware,modeling and simulation is done toget theenvelope diagram of theexcavating track. The main working dimension of the excavator is calculatedaccording to the envelope diagram of the excavating track.Based on the excavatingprocess with single boom cylinder or stick cylinder andthe liftingprocess with the full bucket, optimizing is done for the operating device.Therange of the optimized boom and the stick intersection angle increases. The maxdriving force of the boom cylinder, the stick cylinder and the bucket cylinderdecreases when providing the same force.Based on SOLIDWORKS software and the initial size,this paper sets up thevirtual prototype, ADAMS software was used in dynamics simulationof theexcavatingprocess with single boom cylinder or stick cylinder and the liftingprocesswith the full bucket. MATLAB software is used in the drawing of the envelopediagram of the excavating track, and the genetic algorithm is adopted to hinge pointlocation optimization of the hydraulic excavator.更多还原