分析水压伺服阀液压桥路的正交设计与

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1、学兔兔www.xuetutu.com第45卷第6期机械工程学报VO1．45NO．62009年6月JOURNALOFMECHANICALENGINEERINGJun．2009Dol：1O．3901／JME．2009．O6．067水压伺服阀液压桥路的正交设计与分析水聂松林孔祥纯2贾国涛(1．北京工业大学机械工程与应用电子技术学院北京100022；2．海军驻719所军代表室武汉430060)摘要：提出了一种前置级采用两级串联固定阻尼孔的双喷嘴挡板水压伺服桥路模型，并对其进行了参量敏感性分析。探讨了喷嘴挡板位移、阀芯运动速度与阀芯

2、两端压力的关系；运用正交设计方法研究了喷嘴直径、串联固定阻尼孔直径、阀芯直径及其运动速度、喷嘴挡板与喷嘴之间初始距离等参量对水压桥路特性的影响。结果表明，喷嘴直径以及喷嘴与挡板之间中位距离越小，阀芯与阀套之间配合间隙越大，阀芯直径越大，阀芯与阀套之间叠合长度越短，压力源压力越高，桥路控制的线性度越好；对于采用二级节流的水压伺服桥路，第一级固定阻尼孔直径越小，第二级固定阻尼孔直径越大，喷嘴前端流道直径越小，阀芯与阀套之间配合间隙以及阀芯直径越大，桥路响应就越快。这些研究结果为水压伺服阀样机的研制奠定了理论基础。关键词：水压传

3、动伺服阀液压桥路二级节流正交设计中图分类号：TH137OrthogonalDesignandAnalysesofHydraulicBridgeforterServolveNIESonglinKONGXiangchun2JIAGuotao(1．CollegeofMechanicalEngineeringandAppliedElectronicsTechnology,BeijingUniversityofTechnology,Beijing100022；2．OfficeofNavalRepresentativesin719th

4、ResearchInstitute，Wuhan430060)Abstract：Anewtypeofdoublenozzle—flapperwaterhydraulicservobridgemodelisdeveloped，inwhichthetwotandemfixeddampersareadoptedasprepositivedampers．Theparametersensitivityanalysisforthehydraulicbridgeiscarriedout．Therelationshipamongthefla

5、pperdisplacement，thespoolspeedandthepressureatthetwoendsofthespoolisinvestigated．Theorthogonaldesignisemployedtostudytheinfluenceofthephysicsfactorsonthecharacteristicsofthehydraulicbridge，suchasthediameterofthenozzle，thediametersofthetwotandemfixeddampers，thespoo

6、ldiameteranditsslidingspeed，theinitialclearancebetweennozzleandflapper．Theresultsrevealthat(1)thesmallerinitialclearancebetweennozzleandflapper，thelargerdiameterofspoolandtheclearancebetweenspoolandvalvebody，theshorteroverlaplen~hofspoolandvalvebody，andthehighersy

7、stempressure，willleadtothebetterlinearityofthecontrolcharacteristicsforthewaterhydraulicbridge；(2)forhydraulicbridgeofwaterservovalveincludingthetwo—stagedampers，thesmallerfirstdamperdiameter,thelargerseconddamperdiameter,thesmallerpipediameterbeforethenozzle，thel

8、argerdiameterofspoolandtheclearancebetweenspoolandvalvebody，willbringthehigherdynamicresponseinthewaterhydraulicbridge．Theseresearchresultswilllaythethe