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1、海量机械毕业设计,请联系Q99872184摘要本论文主要阐述了一般掩护式液压支架的设计过程。设计内容包括:选架型、总体设计、主要零部件的设计、主要零部件的校核和液压系统的设计。由于该煤层厚度适中,选用掩护式液压支架。煤层厚度介于之间,煤层厚度变化较大,选用调高范围大且抗水平推力强且带护帮装置的掩护式支架。支架采用正四连杆机构,以改善支架受力状况。顶梁、掩护梁、底座均做成箱体结构;立柱采用双伸缩作用液压缸,以增加工作行程来满足支架调高范围的需要。推移千斤顶采用框架结构,以减少推溜力和增大移架力。为了提高移架速度,确保对
2、顶板的及时支护,采用锥阀液压系统。关键词:液压支架液压四连杆机构采煤支架选型推溜移架-2--2-AbstractThearticlemainlyelaboratedthegeneralshieldtypehydraulicpressuresupportdesignprocess.Thedesigncontentincludes:Chooses,thesystemdesign,themainsparepartdesign,themainsparepartexaminationandthehydraulicsystemd
3、esign.Becausethiscoalbedthicknessismoderate,selectstheshieldtypehydraulicpressuresupport.Coalbedthicknessissituatedbetweenbetweenthe2.5~3.8rice,coalbedthicknesschangebigger,selectsadjuststhehighscopebigalsotheanti-horizontalthrustisstrongalsothebeltprotectshelp
4、stheequipmenttheshieldtypesupport.Thesupportusesthefourlinkmotiongear,improvesthesupportstresscondition.Thetop-beam,cavingshield,thefoundationmakesthepackedinaboxbodystructure;Thecolumnusesthedoubleexpansionandcontractionfunctionhydrauliccylinder,increasesthepo
5、werstroketosatisfythesupporttoadjustthehighscopetheneed.Passesthehoistingjacktousetheportalframeconstruction,reducespushesslidesthestrengthandincreasesmovesastrength.Inordertoenhancemovesaspeed,guaranteesisprompttotheroofsupport,usesthemushroomvalvehydraulicsys
6、tem.Keyword:Thehydraulicpressuresupport,hydraulicpressure,four-linkmechanism,miningcoal,supportshapingpushforwardstheconveyer,advancingthepoweredsupport.-2--77-目录1概述………………………………………………………………………………………51.1液压支架的组成和分类……………………………………………………………51.2液压支架的工作原理…………………………………
7、……………………………81.3液压支架的支护方式………………………………………………………………111.4支架选型的基本参数………………………………………………………………122总体设计………………………………………………………………………………142.1选架型……………………………………………………………………………142.2液压支架基本参数的确定…………………………………………………………162.3采煤机、液压支架和输送机的配套………………………………………………192.4四连杆机构设计…………………………………
8、………………………………212.5顶梁长度的确定…………………………………………………………………282.6立柱及柱窝位置的确定…………………………………………………………292.7平衡千斤顶位置的确定…………………………………………………332.8其它千斤顶位置的确定…………………………………………………363支架的受力计算………………………