【2018年必威体育精装版整理】毕业论文—煤矿用液压支架.docVIP

继续教育学院 函授毕业设计专题 专 题 题 目 液压支架 系 部 名 称 资源与土木工程系 专业班级 采矿工程 学生姓名 指 导 教 师 专题完成时间 ：2010 年 10月 12日 指导教师评阅意见 学 生 姓 名 专 业 班 级 学号 （论文）题目 指导教师 教师职称 指 导 教 师 评 语 评定成绩： 指导教师： 年 月 日 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。 由于煤层较厚，所以采用放顶煤开采。支架形式为支撑掩护式低位放顶煤支架。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。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。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：放顶煤；液压支架；四连杆；底座 Abstract The artile 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. Because the coal bed is thicker, therefore uses the method of top-coving. The support form puts for the strut shield type low position goes against the coal support. 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 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 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 Liang, 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 mov