一种新型并联液压支架的设计与研究

发布时间：2018-06-20 17:51

本文选题：液压支架 + 并联机构　；参考：《安徽理工大学》2015年硕士论文

【摘要】：液压支架作为井下煤炭开采过程中的重要设备,它的适用性对于实现采煤工作的机械化和自动化具有重要意义。它不仅可以极大限度的增加煤炭的开采效率、降低生产成本,而且还可以很大程度上的保障井下工作人员的生命安全。但是,国内现在广泛应用的液压支架存在结构原理上的缺陷,导致这种传统的液压支架存在较大的内力,这会给井下开采工作带来一定的安全隐患。我国现在普遍采用的是基于四连杆机构的液压支架,它是由两个互相平行的四连杆机构组成,其中的每个四连杆机构的自由度都为1,这样整个液压支架的自由度就为-1,属于超静定结构,容易产生较大的内力。本文结合实际工况以及并联机构承载力高、动态性能好、结构简单等优点,提出一种基于并联机构的新型液压支架。通过查阅大量国内外的参考文献,对这种基于并联机构的新型液压支架进行了相关的分析和研究。本文结合6-SPS并联机构的特点,用其代替传统液压支架中的四连杆机构,初步建立了并联液压支架的虚拟样机模型,通过理论计算和ADAMS软件对其自由度进行了计算和验证。简单的讨论了并联液压支架的极限工作空间以及其影响因素。在ADAMS软件中,对并联液压支架的运动学逆解和运动学正解进行了仿真,并通过理论计算对仿真结果进行了验算,验算结果表明运用ADAMS软件对并联液压支架的运动学问题进行仿真是可行的,这也为今后对并联液压支架立柱运动特性的研究提供参考；在ADAMS分析完成的基础上,运用ANSYS Workbench软件研究分析了并联液压支架六根立柱位置的选择对整体最大等效应力的影响,并对结果进行了相关的分析和探讨。
[Abstract]:Hydraulic support is an important equipment in the process of underground coal mining. Its applicability is of great significance to realize mechanization and automation of coal mining. It not only can greatly increase the efficiency of coal mining, reduce production costs, but also to a large extent to ensure the safety of underground workers. However, there are some defects in the structure principle of the hydraulic support which is widely used in our country, which leads to the large internal force of this kind of traditional hydraulic support, which will bring a certain safety hidden danger to the underground mining work. What is commonly used in our country is a hydraulic support based on a four-link mechanism, which is composed of two parallel four-bar linkages. The degree of freedom of each four-bar linkage is 1, so the degree of freedom of the whole hydraulic support is -1, which belongs to the statically indeterminate structure and easily produces a large internal force. In this paper, a new type of hydraulic support based on parallel mechanism is proposed, which combines the advantages of high bearing capacity, good dynamic performance and simple structure of parallel mechanism. By consulting a large number of references at home and abroad, this new type of hydraulic support based on parallel mechanism is analyzed and studied. Based on the characteristics of 6-SPS parallel mechanism, the virtual prototype model of parallel hydraulic support is established by replacing the four-bar mechanism in traditional hydraulic support. The degree of freedom is calculated and verified by theoretical calculation and Adams software. The limit workspace of parallel hydraulic support and its influencing factors are briefly discussed. In Adams software, the kinematics inverse solution and kinematics forward solution of parallel hydraulic support are simulated, and the simulation results are checked by theoretical calculation. The results show that it is feasible to use Adams software to simulate the kinematics of parallel hydraulic support, which provides a reference for the future research on the kinematic characteristics of parallel hydraulic support. The influence of the position of six columns of parallel hydraulic support on the overall maximum equivalent stress is studied by ANSYS Workbench software, and the results are analyzed and discussed.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD355.4

【参考文献】