液压支架基本理论毕业设计.docVIP

摘 要 本论文主要论述了液压支架的主要设计过程。其中包括：液压支架的选型、总体设计、主要零部件的设计、校核及液压系统的设计。 支架采用四连杆机构，改善支架的受力状况，缩小支架升降过程中顶梁前端前后移动的距离。支架除要实现有效地对顶板进行支撑，还要实现升、降、推、移四个步骤。根据设计原始数据，本文主要对掩护式支架进行分析，此支架为两柱掩护式支架，四连杆机构，整体稳定性好 。整体结构强度高，调架范围大，有双行人通道。立柱采用单伸缩液压缸，前端带有加长杆，以满足支架最低及最高位置时的高度要求。支架后部要另设置运输机，以运输放顶煤，提高了产煤量。顶梁、掩护梁、底座都做成箱体结构，用钢板焊接而成。 液压系统采用三位四通阀进行控制，提高了移架速度，确保对顶板的及时支护。 关键词：掩护式液压支架;四连杆;整体顶梁;掩护梁;立柱 Abstract The article mainly elaborate the hydraulic pressure support design for top-caving . Includes: the selection of hydraulic pressure support form, system design, main spar part design and examination of hydraulic system design. The support uses four link motion gears, improves the support the stress condition, reduces the support to rise and fall the distance which in the process front end the top-beam around moves. The support eliminates must realize effectively carries on the strut to the roof, but also must realize rises, to fall, to push, moves four steps. The column uses the list expansion and contraction hydraulic cylinder, front end has lengthens the pole, satisfies the support to be lowest and time the highest position high request. Behind the support must establish the transport aircraft in addition, transports puts goes against the coal, enhanced has produced the coal amount. The top-beam, shields Lang, the foundation all makes the packed in a box body structure, becomes with the steel plate welding. The hydraulic system uses three tubing crosses valves to carry on the control, enhanced moved a speed, the supported and ensure the roof to be supported betimes. Keywords?: Shield powered hydraulic support; support upright four-link mechanism; Integral roof beam; Shield beam;? Intensity legs 目 录 第一章 绪论 1 1.1 液压支架的国内外研究现状 1 1.1.1 国外支架技术发展水平及应用 1 1.1.2 国产支架技术发展水平及应用 1 1.1.3 发展趋势 2 1.2 背景意义 3 1.3 液压支架的操作要求 4 1.3.1 一般规定 4 1.3.2 准备、检查与处理 5 1.3.3 操作及其注意事项 5 第二章 液压支架基本理论 6 2.1 液压支架的组成和分类 6 2.1.1 液压支架的组成 6 2.1.2 液压支架的分类 8 2.2 液压支架的工作原理 10 2.3 液压支架的支护方式 14 2.4 支架的基本设计参数 14 2.4.1 对