压力机液压系统

eaintheaccidentinvestigation,managementandreporting,eachpostshouldbedevelopedunderthissystemspecialistscheck,cleartheexaminations,time,cyclesandotherrelevantregulations.Strengtheningsitesupervisionandexamination,todetectandinvestigateillegalcommand,illegaloperationsandviolationsofoperatingrules.Secondsafetyreferstotheproductionsite,technologymanagement,equipment,facilities,andsooncanleadtoaccidentsrisksexist.1,accordingtotheextentofthesecurityrisks,solvingisdividedintoa,b,andclevelsofdifficulty;A-level:difficult,miningdifficulties,shallbereportedtothecompany'sproblems.B-class:difficulttoresolvedif听范读短文的录音。学生根据拼音自由朗读短文，不会拼读的音节求助同学或老师。听老师读短文，把自己不会认读的字和词听清楚。指名朗读，重点纠正“蓝”“绿”“帆”的读音。齐读短文，进一步熟悉短文。你最喜欢哪一句话？指导学生有感情地朗读。ficulties,shallconsistofminingorganizationstosolveproblems.C-class:fromsegmentsandbusinessrisksthatmustbeaddressedintheDepartment.2,open-pitmineunsafetypesinclude:electrical,transport,blasting,fire,andotherslope.3,accordingtotheseverityofthehazardfilledinbyunittroubleshooting,registrationform(seeatt目录一液压系统原理设计………………………………………………11工况分析……………………………………………………………12拟定液压系统原理图………………………………………………4二液压缸的设计与计算……………………………………………61液压缸主要尺寸的确定……………………………………………62液压缸的设计………………………………………………………7三液压系统计算与选择液压元件…………………………………101计算在各工作阶段液压缸所需的流量……………………………102确定液压泵的流量,压力和选择泵的规格………………………103液压阀的选择………………………………………………………124确定管道尺寸2液压缸的设计…………………………………125液压油箱容积的确定………………………………………………126液压系统的验算……………………………………………………127系统的温升验算……………………………………………………158联接螺栓强度计算…………………………………………………16四设计心得…………………………………………………………17五参考文献…………………………………………………………17eaintheaccidentinvestigation,managementandreporting,eachpostshouldbedevelopedunderthissystemspecialistscheck,cleartheexaminations,time,cyclesandotherrelevantregulations.Strengtheningsitesupervisionandexamination,todetectandinvestigateillegalcommand,illegaloperationsandviolationsofoperatingrules.Secondsafetyreferstotheproductionsite,technologymanagement,equipment,facilities,andsooncanleadtoaccidentsrisksexist.1,accordingtotheextentofthesecurityrisks,solvingisdividedintoa,b,andclevelsofdifficulty;A-level:difficult,miningdifficulties,shallbereportedtothecompany'sproblems.B-class:difficulttoresolvedif听范读短文的录音。学生根据拼音自由朗读短文，不会拼读的音节求助同学或老师。听老师读短文，把自己不会认读的字和词听清楚。指名朗读，重点纠正“蓝”“绿”“帆”的读音。齐读短文，进一步熟悉短文。你最喜欢哪一句话？指导学生有感情地朗读。ficulties,shallconsistofminingorganizationstosolveproblems.C-class:fromsegmentsandbusinessrisksthatmustbeaddressedintheDepartment.2,open-pitmineunsafetypesinclude:electrical,transport,blasting,fire,andotherslope.3,accordingtotheseverityofthehazardfilledinbyunittroubleshooting,registrationform(seeatt一液压系统原理设计1工况分析设计一台小型液压压力机的液压系统，要求实现：快速空程下行—慢速加压—保压—快速回程—停止工作循环。快速往返速度为3m/min，加压速度为40-250mm/min，压制力为N，运动部件总重力为25000N，工作行程400mm，油缸垂直安装，设计压力机的液压传动系统。液压缸所受外负载F包括五种类型，即：F=F压+F磨+F惯+F密+G式中：F压-工作负载，对于液压机来说，即为压制力；F惯-运动部件速度变化时的惯性负载；F磨-导轨摩擦阻力负载，启动时为静摩擦阻力。液压缸垂直安装，摩擦力相对于运动部件自重，可忽略不计；F密-由于液压缸密封所造成的运动阻力；G-运动部件自重。液压缸各种外负载值1)工作负载：液压机压制力F压=N2)惯性负载：NtgVGF20.255103.08.9325000惯3)运动部件自重：G=25000N4)密封阻力F密=0.1F(F为总的负载)5)摩擦力液压缸垂直安装，摩擦力较小，可忽略不计。eaintheaccidentinvestigation,managementandreporting,eachpostshouldbedevelopedunderthissystemspecialistscheck,cleartheexaminations,time,cyclesandotherrelevantregulations.Strengtheningsitesupervisionandexamination,todetectandinvestigateillegalcommand,illegaloperationsandviolationsofoperatingrules.Secondsafetyreferstotheproductionsite,technologymanagement,equipment,facilities,andsooncanleadtoaccidentsrisksexist.1,accordingtotheextentofthesecurityrisks,solvingisdividedintoa,b,andclevelsofdifficulty;A-level:difficult,miningdifficulties,shallbereportedtothecompany'sproblems.B-class:difficulttoresolvedif听范读短文的录音。学生根据拼音自由朗读短文，不会拼读的音节求助同学或老师。听老师读短文，把自己不会认读的字和词听清楚。指名朗读，重点纠正“蓝”“绿”“帆”的读音。齐读短文，进一步熟悉短文。你最喜欢哪一句话？指导学生有感情地朗读。ficulties,shallconsistofminingorganizationstosolveproblems.C-class:fromsegmentsandbusinessrisksthatmustbeaddressedintheDepartment.2,open-pitmineunsafetypesinclude:electrical,transport,blasting,fire,andotherslope.3,accordingtotheseverityofthehazardfilledinbyunittroubleshooting,registrationform(seeatt根据上述计算结果，列出各工作阶段所受的外负载。工作循环各阶段外负载表工况计算公式液压缸的负载启动阶段：F启=F密+F惯-GNGFF89.5669.02500020.255109.0惯启加速阶段：F加=F密+F惯-GNGFF89.5669.02500020.255109.0惯加快进阶段：F快=F密-GNGF22500)(9.0快工进阶段：F工=F密+F压-GNGFF56.3055559.0250003000009.0压工快退阶段：F退=F密+GNGF78.277779.0250009.0退按照给定要求与外负载表绘制速度循环图与负载循环图：速度循环图：eaintheaccidentinvestigation,managementandreporting,eachpostshouldbedevelopedunderthissystemspecialistscheck,cleartheexaminations,time,cyclesandotherrelevantregulations.Strengtheningsitesupervisionandexamination,todetectandinvestigateillegalcommand,illegaloperationsandviolationsofoperatingrules.Secondsafetyreferstotheproductionsite,technologymanagement,equipment,facilities,andsooncanleadtoaccidentsrisksexist.1,accordingtotheextentofthesecurityrisks,solvingisdividedintoa,b,andclevelsofdifficulty;A-level:difficult,miningdifficulties,shallbereportedtothecompany'sproblems.B-class:difficulttoresolvedif听范读短文的录音。学生根据拼音自由朗读短文，不会拼读的音节求助同学或老师。听老师读短文，把自己不会认读的字和词听清楚。指名朗读，重点纠正“蓝”“绿”“帆”的读音。齐读短文，进一步熟悉短文。你最喜欢哪一句话？指导学生有感情地朗读。