牙轮钻机回转机构的动态特性研究

发布时间：2018-03-14 14:16

本文选题：牙轮钻机　切入点：回转机构　出处：《吉林大学》2017年硕士论文　论文类型：学位论文

【摘要】：采矿工业是国民经济的基础,它担负着为各部门提供原料和燃料的任务。牙轮钻机广泛应用于露天矿山中,其性能的好坏直接关系着整个矿山的生产效率和经济效益。回转机构是牙轮钻机实现钻孔的重要传动机构,在钻孔作业中,其工作环境恶劣、承受的冲击和振动大,所以对其性能和质量有很高的要求。本文结合校企合作项目,采用先进的设计方法以及分析技术对某新型牙轮钻机的回转机构进行静力学分析和动态特性分析,找出箱体及回转小车的薄弱环节,为回转机构的改进设计提供合理有效的依据。本文研究的主要内容有:1.简要介绍牙轮钻机的工作原理和主要结构以及国内外的发展现状和趋势,对回转机构的组成和研究现状进行系统综述。2.介绍回转机构的结构和传动特点,分析回转机构的技术要求,计算齿轮传动的啮合频率、回转频率和理论啮合力,为后续回转机构的动力学仿真提供理论依据。3.基于UG8.0软件建立回转机构三维模型,并进行装配体干涉检查,得到回转机构的装配模型。利用UG与ADAMS2013动力学仿真软件的接口程序,将简化后的回转机构虚拟样机模型导入到ADAMS中,添加各零件标识符并赋予质量,完成前处理工作后,进行回转机构的动力学仿真。在ADAMS/Post Processor中提取不同工况下各轴承的受力,为回转减速器箱体和回转小车的性能分析做准备。4.考虑到分析软件ANSYS Workbench14.5的计算精度和效率,忽略对计算结果影响很小的因素,将减速器箱体和回转小车合理简化成一个整体。通过UG和Workbench有限元分析软件的接口程序将简化后的回转小车有限元模型导入到Workbench中,在完成定义单元类型、划分网格等静力学分析的前处理后,进行求解,获得回转小车的强度及刚度,为下文的动态特性分析打下基础。5.应用ANSYS Workbench有限元分析软件的模态分析模块和谐响应分析模块,研究回转小车的动态响应特性。提取回转小车的前12阶模态,与第二章齿轮的振动频率比对,找到可能发生共振的特殊情况。通过对回转小车的各阶振型的描述,将其变形趋势较大的节点作为共振研究的对象,利用该节点的频率响应曲线判断回转小车的合理性,为回转机构的设计及改进提出意见。本文通过UG软件的三维建模、ADAMS动力学分析软件的虚拟样机仿真、ANSYS Workbench的有限元分析等技术手段的综合运用,对回转机构的动态特性进行系统的研究,为回转机构的结构优化和振动特性分析提供参考。
[Abstract]:The mining industry is the foundation of the national economy, which is responsible for providing raw materials and fuel for various departments. Its performance is directly related to the production efficiency and economic benefit of the whole mine. The rotary mechanism is an important driving mechanism for drillers to drill holes. In drilling operation, the working environment is bad, and the impact and vibration are great. Therefore, the performance and quality of the rotary mechanism of a new type of rotary drilling machine are analyzed by statics and dynamic characteristics of the rotary mechanism of a new type of rotary drill, which is based on the project of cooperation between school and enterprise, and the advanced design method and analysis technology are adopted in this paper. Find out the weak links of the box body and the turning car, This paper provides a reasonable and effective basis for improving the design of rotary mechanism. The main contents of this paper are as follows: 1. Briefly introduce the working principle and main structure of rotary drilling rig, and the present situation and trend of development at home and abroad. The structure and transmission characteristics of rotary mechanism are introduced, the technical requirements of rotary mechanism are analyzed, and the meshing frequency, rotary frequency and theoretical meshing force of gear transmission are calculated. The 3D model of rotary mechanism is established based on UG8.0 software, and the assembly model of rotary mechanism is obtained by means of assembly interference inspection. The interface program between UG and ADAMS2013 dynamic simulation software is used. The simplified virtual prototype model of rotary mechanism is imported into ADAMS, each part identifier is added and the quality is assigned. After the pre-processing work is completed, the dynamic simulation of the rotary mechanism is carried out. The bearing forces under different working conditions are extracted in ADAMS/Post Processor. To prepare for the performance analysis of the box body and the rotary trolley of the rotary reducer. Considering the accuracy and efficiency of the analysis software ANSYS Workbench14.5, the factors which have little influence on the calculation results are ignored. Through the interface program of UG and Workbench finite element analysis software, the simplified finite element model of rotary trolley is imported into Workbench, and the unit type is defined. After the pre-processing of meshing isostatics analysis, the strength and stiffness of the rotary trolley are obtained, which lays the foundation for the dynamic characteristic analysis below .5.Using the modal analysis module of ANSYS Workbench finite element analysis software, the modal analysis module is harmonious response analysis module. The dynamic response characteristics of the rotary trolley are studied. The first 12 modes of the rotary trolley are extracted, compared with the vibration frequency of the gear in Chapter 2, and the special case of resonance is found. The node with a large deformation trend is regarded as the object of resonance research. The rationality of the rotary trolley is judged by the frequency response curve of the node. This paper puts forward some suggestions for the design and improvement of rotary mechanism. This paper presents a comprehensive application of finite element analysis of ANSYS Workbench through 3D modeling of UG software and virtual prototype simulation of Adams dynamic analysis software. The dynamic characteristics of the rotary mechanism are systematically studied, which provides a reference for the optimization of the structure and the analysis of the vibration characteristics of the rotary mechanism.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD422.1

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