新型液压凿岩机活塞缓冲油垫区长度设计.pdf

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1、机床与液压Mar．2013HydromechatronicsEngineeringVo1．41No．6DOI：10．3969／j．issn．1001—3881．2013．06．022DesignandResearchontheLengthofPiston’sBuferOilMatAreaofaNewTypeofHydraulicRockDrillWANSheng，XIEXiaoliSichuanEngineeringTechnicalCollege，Deyang618000，ChinaAbstract：Fortheco

2、mplicatedworkingconditionsofrockdrills，suchasacrackintherock，une-venhardnessofrockandimproperoperation，thepistonofrockdrillisunabletohitsteelchiseltailpromptly．Therefore，theemptyhittingphenomenonappears．Toavoidthisphenomenon，itisnecessarytodeducelengthofthepisto

3、nbuferoilmatarea．Accordingtoconstantdecelera-tionbuferstagemotionandvariabledecelerationbuferstagemotionofthepistonforanewhy-draulicrockdrill，thepistondynamicsequationswerelistedseparatelyinthispaper．Furthermore，piston’smovingvelocityandaccelerationformulasarede

4、rivedduringitsemptyhitingbuferstage．Andthedesignandcalculationmethodofthelengthofpiston’sbuferoilmatareaisobtained．Keywords：newtypeofhydrauliccrockdrill，impactpiston，thelengthofpiston’soilmatareaPercussiverockdrillisimportantequipmentineficiencyandlowenergyconsu

5、mption．Basedontheminingandquarrying．Withthedevelopmentofex-operatingenvironmentofthenewhydraulicdrillma—tractiveindustries，workingbehaviorofhydraulicchine，thepapergivesthelengthofpiston’sbufferdrillmachineisinanincreasinglyhighdemand[1—oilmatarea，whichisdetermin

6、edtoavoidtheempty4]．Comparedwithautomaticreversingdeviceoftra-hitting．ditionalhydraulicdrillmachine，thenewtypeofhy—draulicdrillmachinehastwo--positiontwo·-wayhy--drauliccontrolledreversingvalveandtwo—positionfour—wayhydrauliccontrolledreversingvalve，whichisconne

7、ctedwithtwo··positiontwo-·waysolenoidvalve，pressurereliefvalve，pressurereducingvalve，restrictivevalveandcheckvalvesuccessively．Theadvantagesofthiskindofdrillmachine’splungertiparethatthedirectioncommutationisnimble，relia-ble，highfrequency，quickreposition．Andthep

8、lungertipalsocanachieveselfadaptivecontrolun—1．hydraulicpump，2．reliefvalve，3．impactmechanism，4．derdifferentoperationconditionssuchasclay，hydrauliccontrolone—wayvalve，