新型正铲液压挖掘机工作装置的结构优化设计
发布时间：2019-03-06 14:43
【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。
[Abstract]:Hydraulic excavator is a kind of multi-functional machinery, which is widely used in hydraulic engineering, transportation, electric power engineering and mining machinery construction. It plays an important role in lightening the heavy physical labor, ensuring the engineering quality, speeding up the construction speed and improving the labor productivity. Hydraulic excavator has many characteristics, such as multi-variety, multi-function, high quality and high efficiency, so it has been favored by many construction units. In this paper, a new type of forward shovel hydraulic excavator driven indirectly by moving arm is designed and optimized, so that its structure and mechanical properties can be improved. Starting from the composition and working characteristics of the working device of the forward shovel hydraulic excavator, referring to the RH40E forward shovel excavator of Trex Company of the United States of America, and according to the industry experience coefficient of the excavator, the parameters of the excavator, including the moving arm, are preliminarily determined. Bucket rod and bucket mechanism related geometric parameters as well as the main working dimensions of the excavator. The MATLAB software is used to model the mechanism and simulate the excavator to obtain the envelope diagram of the excavator track. According to the envelope diagram, the main working dimensions of the excavator are obtained under the initial size of the excavator. Based on the excavating process of excavator bucket cylinder, the single excavating process of bucket cylinder and the lifting process of full bucket, genetic algorithm is used to optimize the operating device, and the range of the rotation angle of arm and the angle of bucket rod is increased after optimizing. When the same excavating force is output, the maximum thrust provided by the bucket rod cylinder and the bucket cylinder is reduced, and the thrust required by the dynamic arm cylinder during the full bucket lifting process is reduced. Based on the SolidWorks software, the virtual prototype is established according to the initial size. The ADAMS software is used to simulate the single excavating process of the bucket cylinder, the single excavating process of the bucket cylinder and the lifting process of the full bucket, and the MATLAB software is used to draw the envelope diagram of the excavating track. Genetic algorithm is used to optimize the hinge position of hydraulic excavator.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU621
本文编号：2435619
[Abstract]:Hydraulic excavator is a kind of multi-functional machinery, which is widely used in hydraulic engineering, transportation, electric power engineering and mining machinery construction. It plays an important role in lightening the heavy physical labor, ensuring the engineering quality, speeding up the construction speed and improving the labor productivity. Hydraulic excavator has many characteristics, such as multi-variety, multi-function, high quality and high efficiency, so it has been favored by many construction units. In this paper, a new type of forward shovel hydraulic excavator driven indirectly by moving arm is designed and optimized, so that its structure and mechanical properties can be improved. Starting from the composition and working characteristics of the working device of the forward shovel hydraulic excavator, referring to the RH40E forward shovel excavator of Trex Company of the United States of America, and according to the industry experience coefficient of the excavator, the parameters of the excavator, including the moving arm, are preliminarily determined. Bucket rod and bucket mechanism related geometric parameters as well as the main working dimensions of the excavator. The MATLAB software is used to model the mechanism and simulate the excavator to obtain the envelope diagram of the excavator track. According to the envelope diagram, the main working dimensions of the excavator are obtained under the initial size of the excavator. Based on the excavating process of excavator bucket cylinder, the single excavating process of bucket cylinder and the lifting process of full bucket, genetic algorithm is used to optimize the operating device, and the range of the rotation angle of arm and the angle of bucket rod is increased after optimizing. When the same excavating force is output, the maximum thrust provided by the bucket rod cylinder and the bucket cylinder is reduced, and the thrust required by the dynamic arm cylinder during the full bucket lifting process is reduced. Based on the SolidWorks software, the virtual prototype is established according to the initial size. The ADAMS software is used to simulate the single excavating process of the bucket cylinder, the single excavating process of the bucket cylinder and the lifting process of the full bucket, and the MATLAB software is used to draw the envelope diagram of the excavating track. Genetic algorithm is used to optimize the hinge position of hydraulic excavator.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU621
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