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1、撼神高频率液压缸应用在疲乏试验机疲乏试验机技术指标Hydrauliccylindervibratestoa400Hzsine.(DYNA-MESSGmbh)andHnchenreachnewheightsofperformanceHydraulicsiscutting一edgetechnologyAccordingtoDr.MarcusJarchow,ManagingDirectorofDYNA一MESS,thesetestunitsareexposedtoextremestresseswithanominalforceof10kNandafrequencyofanythingfrom0to4
2、00Hz.Ithasbeenextremelydifficulttofindasuitablyhigh一performancehydrauliccylinderonthehydraulicsmarket,becausethetestdevicedependsontheperfectstick一slipbehaviourofthehydraulicsystem.CylinderswithhydrostaticallysupportedpistonrodguidesarenormalIyusedforthistypeofapplication,butthetechnicalexpendituref
3、orthissolutionisenormous.uWehaveneverthelesskeptourearstothegroundtotryandfindoutwhocanoffersomehelpwithfindingasolution,rstatedtheManagingDirectorofDYNA一MESS.Everybodyhesitatedwhenwementionedthetechnicalrequirements,withtheexceptionofHnchenHydraulik.Afurtherargumentintheirfavourwasthattheyhadtheiro
4、wntestequipmentandwouldbeabletobasetheirresultsonextensiveexperience.Ultimately,thehydraulicspecialistsfromOstfildern,nearStuttgart,offeredastandardcylinderwithpatented,floatingannulargapsealwhichisconsiderablymorecost-effectivethandriveswithhydrostaticallysupportedpistonrodguides”.ThePZLassemblyseriesfromHnchen,however,alsoprovidesthesehigh-endcylinders.
