本文選題：大采高 + 液壓支架�。� 參考：《山東科技大學(xué)》2017年碩士論文

【摘要】：大采高液壓支架可靠性是決定厚煤層大采高工作面高產(chǎn)高效的關(guān)鍵因素,由于其支護(hù)高度大、受力復(fù)雜,對(duì)結(jié)構(gòu)件強(qiáng)度、液壓控制系統(tǒng)和加工精度提出更高要求。論文從大采高支架的結(jié)構(gòu)設(shè)計(jì)、液壓控制系統(tǒng)特性、加工工藝等方面對(duì)厚煤層工作面大采高液壓支架可靠性能進(jìn)行研究,解決大采高液壓支架設(shè)計(jì)與制造中的技術(shù)問題,以提高大采高液壓支架的工作性能。論文首先根據(jù)厚煤層賦存條件,計(jì)算大采高液壓支架關(guān)鍵技術(shù)參數(shù),并基于虛擬樣機(jī)技術(shù)對(duì)液壓支架主要部件設(shè)計(jì),提出適用于工作面條件的大采高液壓支架設(shè)計(jì)方案;其次分析大采高支架與圍巖相互作用關(guān)系,對(duì)液壓支架整架力學(xué)計(jì)算,應(yīng)用ANSYS Workbench建立液壓支架整架及關(guān)鍵部件有限元模型,并分析其應(yīng)力應(yīng)變,找出薄弱環(huán)節(jié),確保液壓支架強(qiáng)度可靠性;同時(shí)基于AMESim仿真平臺(tái)對(duì)大采高支架液控系統(tǒng)中安全閥、電液換向閥等關(guān)鍵閥類元件建模仿真,分析其工作性能;并對(duì)立柱回路、推移回路及平衡回路進(jìn)行仿真分析,得出回路的壓力、流量及位移等特性曲線,為改善液控回路的工作可靠性奠定基礎(chǔ);最后,從選材、下料、焊接、裝配等方面對(duì)大采高液壓支架加工工藝進(jìn)行研究,通過制定合理的支架結(jié)構(gòu)件工藝流程、液壓缸加工工藝以及立柱立式裝配工藝,來保證液壓支架整體加工工藝可靠性。論文采用計(jì)算機(jī)輔助設(shè)計(jì)等現(xiàn)代設(shè)計(jì)方法對(duì)大采高液壓支架方案設(shè)計(jì)、空間力學(xué)分析及結(jié)構(gòu)有限元分析,提高大采高液壓支架設(shè)計(jì)可靠性。應(yīng)用虛擬仿真對(duì)大采高液壓支架液壓控制回路進(jìn)行建模分析,提高支架液壓系統(tǒng)可靠性,為液壓系統(tǒng)參數(shù)優(yōu)化提供參考依據(jù)。同時(shí)通過制定合理的加工、焊接與裝配工藝,保證大采高液壓支架加工質(zhì)量。論文研究對(duì)解決厚煤層大采高液壓支架結(jié)構(gòu)件強(qiáng)度低和液壓控制系統(tǒng)不穩(wěn)定等技術(shù)難題具有一定的借鑒意義。
[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.
【學(xué)位授予單位】：山東科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TD355.4

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