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ZZ7200-23-38型液压支架设计毕业论文.doc

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ZZ7200-23-38型液压支架设计毕业论文.doc

iZZ7200/23/38型液压支架摘要采煤综合机械化,是加速我国煤炭工业发展,大幅度提高劳动生产率,实现煤炭工业现代化的一项战略措施。综合机械化不仅产量大,效率高,成本低,而且能减轻笨重的体力劳动,改善作业环境,是煤炭工业技术的发展方向。液压支架是综合机械化采煤方法中最重要的设备之一。液压支架主要由以下几个基本部分组成顶梁,掩护梁和四连杆机构,侧护板,底座,立柱,千斤顶。设计要遵从支护性能好、强度高、移架速度快、安全可靠等原则。在支撑掩护式的设计过程中,底座、液压系统和立柱等结构件的设计是重点。本论文介绍了液压支架的结构,类型,工作原理,特点,目的及要求,对支撑掩护式液压支架作了详尽的分析和介绍,讲述了这种支架的方案和用途。关键词液压支架立柱底座四连杆机构iiAbstractThecomprehensivemechanizationofcoalminingistheaccelerationcoalindustrialdevelopmentofourcountry,raiseslaborproductivitysubstantially,realizesthemodernastrategicmeasureofcoalindustry.Synthesizemechanizationnotonlyoutputbig,efficiencyhaslowcosthighandcanalleviateheavyphysicallaborandimprovementschoolworkenvironment,isthetechnologyofcoalindustrydevelopdirection.Hydraulicsupportistheoneofcomprehensivemostimportantequipmentinthemechanizationmethodofcoalmining.HydraulicsupportmajorfromsomefollowingbasicallypartialcompositionsTopbeam,screensbeamand4linkagemechanisms,sidefender,base,prop.Designtofollowprotectperformancegood,strengthisspeedhigh,moverapid,safelyreliableetc.principle.Inthedesigncoursethatthetypeofsupportscovertype,thedesignofcanopyandcavingshieldandpropsiskey.Thispaperhasintroducedrequirement,type,workingprinciple,characteristic,purposeandthestructureofhydraulicsupport,forscreeningtypehydraulicpressuresupporthavemadedetailedanalysisandintroduction,havenarrateduseandtheschemeofthiskindofsupport.KeywordHydraulicsupportcolumnfoundation4linkagemechanismsiii目录第一章概述.......................................................................................................................1第一节国内外液压支架的发展状况............................................................................1第二节国内外液压支架的差异....................................................................................3第三节液压支架的发展趋势........................................................................................4第二章液压支架类型、选型原则及支撑掩护式支架的工作原理...............................5第一节液压支架的类型及基本特点............................................................................5一支撑式液压支架......................................................................................................5二掩护式液压支架......................................................................................................6三支撑掩护式液压支架..............................................................................................7四特殊用途的液压支架..............................................................................................8第二节液压支架的选型..............................................................................................10一工作面支架............................................................................................................10二端头支架................................................................................................................11第三节支撑掩护式液压支架工作原理......................................................................11第三章液压支架的整体结构尺寸设计.........................................................................14第一节设计目的,要求及必要的基本参数..............................................................14一设计目的................................................................................................................14二设计要求................................................................................................................14三设计液压支架必需的基本参数............................................................................15四液压支架设计的原始条件....................................................................................15第二节液压支架的整体结构设计..............................................................................16一底座选择与设计....................................................................................................16二顶梁的选择与设计................................................................................................16三推移装置的选择与设计........................................................................................17四立柱的选择与设计................................................................................................17第三节液压支架基本技术参数的确定......................................................................19一支护高度................................................................................................................19二支护面积................................................................................................................20三支护强度................................................................................................................20四底板平均接触比压................................................................................................21五立柱主要参数确定................................................................................................21六泵站压力的确定....................................................................................................22第四节液压支架四连杆机构的确定..........................................................................23一四连杆机构的作用................................................................................................23二四连杆机构的几何作图法....................................................................................25三几何作图法作图过程............................................................................................26四四连杆机构的优选设计法....................................................................................28第五节支架的主要结构及其作用..............................................................................29第六节液压系统..........................................................................................................30iv一液压系统的主要特点............................................................................................30二液压系统的基本要求............................................................................................31第七节支架在设计中突出的特点..............................................................................33第四章液压支架的受力分析.........................................................................................34第一节液压支架的受力分析与计算..........................................................................34一对顶梁进行受力分析............................................................................................35二对掩护梁进行受力分析........................................................................................36三顶梁载荷分布........................................................................................................37四支护强度................................................................................................................39五支护效率................................................................................................................39第二节液压支架受力的影响因数..............................................................................40一立柱倾角对承载能力的影响..............................................................................40二tanθ值对支架承载能力的影响.............................................................................40三支架承载能力随高度的变化................................................................................40四摩擦系数的影响....................................................................................................41第五章液压支架的使用、维护及常见故障及其排除方法.........................................42第一节支架的运输和工作面安装..............................................................................42一支架在地面和井下的运输....................................................................................42二支架在工作面的安装............................................................................................42第二节支架的操作和维护..........................................................................................42一对支架操作维护的要求........................................................................................42二支架的操作注意事项............................................................................................43三支架的维护和管理................................................................................................43四注意事项及警示....................................................................................................44第三节常见故障及其排除方法..................................................................................45一结构件和连接销轴................................................................................................45二系统及液压元件....................................................................................................46三立柱........................................................................................................................46四支架的操作中出现故障........................................................................................47结束语.................................................................................................................................54参考文献.............................................................................................................................55英文文献...............................................................................................错误未定义书签。中文翻译...............................................................................................错误未定义书签。致谢...................................................................................................错误未定义书签。

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