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ID:32686933
大小:1.05 MB
页数:7页
时间:2019-02-14
《对于低摩擦高频响变间隙密封液压缸研究》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、学兔兔www.xuetutu.com第51卷第24期机械工程学报Vb1.51NO.242015年12月JOURNALOFMECHANICALENGINEERINGDec.2O15DoI:1O.3901/JME.2015.24.161低摩擦高频晌变间隙密封液压缸研究珠湛从昌邓江洪陈奎生(武汉科技大学机械自动化学院武汉430081)摘要:液压缸是液压系统重要元件,其动静态特性直接影响液压系统正常工作性能。由于具有密封件的第一代液压缸摩擦力大、动态性能差,不适应高频工作的液压伺服系统,制约了液压缸向高速方向发展,第二代间隙密封液压缸采用恒间隙密封技术,摩擦力
2、减小,动态响应提高,但容积效率降低。为此,在第一代和第二代基础上,经过多年努力,研发出无密封件并采用压力自补偿变间隙密封技术的第三代液压缸,通过理论分析、数学建模、仿真研究、试验验证及应用,第三代液压缸动静态性能好,容积效率高,工作寿命长,适用于高频响、高速度的液压传动及液压伺服系统。压力自补偿变间隙密封技术可以推广到其他具有微小变形要求的液压元件中,使制造业和液压技术在创新上前进一步。关键词:液压缸;高频响;低摩擦力;无密封件;变间隙密封中图分类号:TH137ResearchonLow-·frictionandHigh--responseHydrau
3、licCylinderwithVariableClearanceZHANCongchangDENGJianghongCHENKuisheng(CollegeofMechanicalAutomation,WuhanUniversityofScienceandTechnology,Wuhan430081)Abstract:Hydrauliccylinderisanimportantcomponentofthehydraulicsystem.Itdirectlyafectsthestaticanddynamiccharacteristicsofthehydr
4、aulicsystem.Thefirstgenerationofhydrauliccylinderwithrubbersealshasgreatfrictionandpoordynamicperformance.Hence,itisnotadaptedtothehydraulicsystemwithhighfrequencyandrestrictsthedevelopmentofhigh—speedhydrauliccylinder.Thesecondgenerationofhydrauliccylinderwithclearancegapsealsu
5、sesconstantgapsealingtechnologytodecreasethefrictionandimprovethedynamicresponse,butthevolumeeficiencyisreduced.Afteryearsofresearches,thethirdgenerationofhydrauliccylinderwithoutsealsusingpressureself-compensationandvariableclearancetechnologyisdevelopedonthebasisofthefirstands
6、econdgenerationofhydrauliccylinders.Aftertheoreticalanalysis,mathematicalmodeling,simulationresearch,experimentalverificationandapplications,itisprovedthatthethirdgenerationofhydrauliccylinderhadperfectstaticanddynamiccharacteristicsandlongworkinglife.Itiswellappliedtohighfreque
7、ncyresponseandhigh—speedhydraulictransmissionandhydraulicservosystem.ThesetechnologiesCanbeextendedtootherhydrauliccomponentsthatrequiresmalldeformation,andcanmakethemanufacturingandthehydraulictechnologygoforward.Keywords:hydrauliccylinder;highfrequencyresponse:lowfriction;with
8、outseals;variableclearanceseal低液压缸寿命J。如图1所示,该图的
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