摘要为了有效地支护和控制顶板，必须设计出不同类型和不同结构尺寸的液压支架。液压支架的设计工作是十分重要的，因为它能极大地提高劳动生产率，被广泛地应用于现代化矿山的机械化工作面。本文简单介绍了支撑式、掩护式和支撑掩护式液压支架的特点；概括地说明了掩护式液压支架的技术参数、结构特点、工作原理和应用范围；阐述了四连杆机构的优越性。首先，根据给定条件进行比较分析，选择一种比较合理的方案，然后，根据工作条件，选择并确定支架的主要参数及支架各部分结构。在支架受力分析中，主要分析顶梁、掩护梁、底座等的受力情况，并根据受力确定各部件的结构尺寸，对其进行了强度校核。本文设计的液压支架稳定性好、整体性强、安全性高，符合安全生产的要求。关键词:液压支架;结构;强度;掩护式AbstractToprotectandcontrolcrestplankeffectively，wehavetodesignhydraulicsupportsthatbelongtodifferenttypesanddifferentstructuresizes.Thedesignworkofhydraulicsupportisveryimportant.Becauseitcanraiselaborproductivitygreatly,broadlyusedinthemodernmechanizedminingface.Thistextsimplyintroducesthecharacteristicofholdingsupport,shieldsupportandholding-shieldsupport.Itexplainsgenerallythetechniqueparameters,thestructurecharacteristics,workprincipleandapplicationsofshieldsupport.Italsoexpoundsthesuperiorityofthefourlinkagebar.Firstly,itcomparesandanalysesaccordingtothegivenconditions,selectsamorereasonableprogram.Thenaccordingtoworkconditions,thisdesignchoosesanddecidessupport’smainparametersandthestructureofallthepartsofsupportandthenselectstheappropriatehydraulicsystemthatitfitsthesupport.Intheaccepting-strengthanalysisofsupport,Analysismainlyaccepting-strengthstatusofroofbeam,coveringbeamandthebase.Structuresizesofallcomponentsisdecidedaccordingtoaccepting-strengthstatus,anditsintensityischecked.Thehydraulicsupportsthistextdesignswhosestabilityisgood,integrityisstrongandsecurityishigh.Itmeetstherequestsofsafeproduction.keywordsSupportstructurestrengthshield目录摘要...........................................................IAbstract.........................................................II第1章绪论...................................................11.1液压支架发展概况.....................................11.2国内外支架的现状与国外的差距........................11.2.1国外液压支架现状..............................11.2.2国内液压支架现状..............................21.2.3我国液压支架与国外液压支架存在的差距..........41.3液压支架研究发展趋势................................4第2章液压支架的使用及使用范围..............................62.1液压支架的分类.......................................62.2液压支架的适用范围...................................62.3掩护式液压支架的分类及结构..........................72.3.1掩护式液压支架的分类..........................72.3.2掩护式液压支架的整体结构......................7第3章液压支架的工作原理....................................83.1液压支架的用途及适用原理............................83.1.1液压支架的用途................................83.1.2液压支架的动作原理及它的特性曲线形式..........83.1.3移架力大于推溜力的原因及实现方法..............93.2液压支架部件工作原理及要求..........................103.2.1作用在顶梁和底座上的摩擦力的产生原因及方向....103.2.2立柱在支架工作过程中的作用及对性能的要求......103.2.3液控单向阀在立柱和推移千斤顶上的工作原理......10第4章设计方案...............................................124.1设计方案的拟订.......................................124.2主要技术经济指标..........................
