厚煤层工作面大采高液压支架可靠性能研究

发布时间：2018-07-05 18:47

本文选题：大采高 + 液压支架　；参考：《山东科技大学》2017年硕士论文

【摘要】：大采高液压支架可靠性是决定厚煤层大采高工作面高产高效的关键因素,由于其支护高度大、受力复杂,对结构件强度、液压控制系统和加工精度提出更高要求。论文从大采高支架的结构设计、液压控制系统特性、加工工艺等方面对厚煤层工作面大采高液压支架可靠性能进行研究,解决大采高液压支架设计与制造中的技术问题,以提高大采高液压支架的工作性能。论文首先根据厚煤层赋存条件,计算大采高液压支架关键技术参数,并基于虚拟样机技术对液压支架主要部件设计,提出适用于工作面条件的大采高液压支架设计方案;其次分析大采高支架与围岩相互作用关系,对液压支架整架力学计算,应用ANSYS Workbench建立液压支架整架及关键部件有限元模型,并分析其应力应变,找出薄弱环节,确保液压支架强度可靠性;同时基于AMESim仿真平台对大采高支架液控系统中安全阀、电液换向阀等关键阀类元件建模仿真,分析其工作性能;并对立柱回路、推移回路及平衡回路进行仿真分析,得出回路的压力、流量及位移等特性曲线,为改善液控回路的工作可靠性奠定基础;最后,从选材、下料、焊接、装配等方面对大采高液压支架加工工艺进行研究,通过制定合理的支架结构件工艺流程、液压缸加工工艺以及立柱立式装配工艺,来保证液压支架整体加工工艺可靠性。论文采用计算机辅助设计等现代设计方法对大采高液压支架方案设计、空间力学分析及结构有限元分析,提高大采高液压支架设计可靠性。应用虚拟仿真对大采高液压支架液压控制回路进行建模分析,提高支架液压系统可靠性,为液压系统参数优化提供参考依据。同时通过制定合理的加工、焊接与装配工艺,保证大采高液压支架加工质量。论文研究对解决厚煤层大采高液压支架结构件强度低和液压控制系统不稳定等技术难题具有一定的借鉴意义。
[Abstract]:The reliability of large mining height hydraulic support is the key factor to determine the high yield and high efficiency of thick coal seam large mining face. Because of its large supporting height and complicated force, higher requirements are put forward for structural strength, hydraulic control system and machining precision. In this paper, the reliable performance of large height hydraulic support in thick coal face is studied from the aspects of structure design, hydraulic control system characteristics, processing technology and so on, and the technical problems in the design and manufacture of large mining height hydraulic support are solved. In order to improve the working performance of large mining high hydraulic support. Firstly, according to the occurrence condition of thick coal seam, the key technical parameters of large mining height hydraulic support are calculated, and the main components of hydraulic support are designed based on virtual prototyping technology, and the design scheme of large mining height hydraulic support suitable for working face condition is put forward. Secondly, the interaction relationship between large mining height support and surrounding rock is analyzed. The finite element model of the whole frame and key components of hydraulic support is established by ANSYS Workbench, and its stress and strain are analyzed to find out the weak link. At the same time, based on AMESim simulation platform, modeling and simulation of safety valve, electro-hydraulic directional valve and other key valve components in hydraulic control system of large mining height support, the working performance of hydraulic support is analyzed. The characteristic curves of pressure, flow and displacement of the circuit are obtained by simulation and analysis of the load loop and the balance circuit, which lays a foundation for improving the working reliability of the hydraulic control loop. Finally, from the material selection, material cutting, welding, In order to ensure the reliability of the whole processing technology of the hydraulic support, the machining technology of the hydraulic support with large mining height is studied in the aspects of assembly, and the reasonable technological process of the support structure, the processing technology of the hydraulic cylinder and the vertical assembly of the column are worked out in order to ensure the reliability of the whole processing technology. In this paper, modern design methods such as computer aided design (CAD) are used to design hydraulic support for large mining height, spatial mechanics analysis and structural finite element analysis are used to improve the reliability of hydraulic support design for large mining height. Virtual simulation is used to model and analyze the hydraulic control circuit of large mining height hydraulic support to improve the reliability of the hydraulic system of the support and to provide a reference for the parameter optimization of the hydraulic system. At the same time, the machining quality of hydraulic support with large mining height is ensured by making reasonable processing, welding and assembling technology. The research in this paper is helpful to solve the technical problems such as low strength of hydraulic support and instability of hydraulic control system in thick coal seam.
【学位授予单位】：山东科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD355.4

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