您好,欢迎访问三七文档
SUNProduct/CompanyIntroductionSeminarCounterbalanceCartridgeValves平衡阀ProductOverviewSUNProduct/CompanyIntroductionSeminarCounterbalanceCartridgeValves©2009SunHydraulicsCorporation2平衡阀•用于负载保持和运动控制的液压元件(例如空中调平)•特别适合负载的平稳运动,防止其超速运动•2口至1口自由流通;反向截止,直到先导压力(带有一定比例系数)和负载压力的合力克服弹簧力•有3口和4口两种结构•建议安装在离执行器越近越好,以此提供最大的平稳控制以及防止管路爆裂SUNProduct/CompanyIntroductionSeminarCounterbalanceCartridgeValves©2009SunHydraulicsCorporation3平衡阀总览SUNProduct/CompanyIntroductionSeminarCounterbalanceCartridgeValves©2009SunHydraulicsCorporation4平衡阀总览SUNProduct/CompanyIntroductionSeminarCounterbalanceCartridgeValves©2009SunHydraulicsCorporation5CB**-L**,3口标准平衡阀先导控制,没有泄油口•标准3口结构,带有溢流功能.•最大泄漏量5滴/分.•复位压力在设定值的85%.SUNProduct/CompanyIntroductionSeminarCounterbalanceCartridgeValves©2009SunHydraulicsCorporation6CB**标准平衡阀的典型回路•Sun先导平衡阀(CB**)在此回路中使用,为了防止重物超速行驶,损坏液压泵,同时也在液压缸伸出和收回状态切换过程中对负载控制.•此阀对油缸提供溢流保护,防止外界突然的冲击.SUNProduct/CompanyIntroductionSeminarCounterbalanceCartridgeValves©2009SunHydraulicsCorporation7CC*A-L**,3口无先导口直动式平衡阀,无泄油口•标准3口孔,但是不需要外部先导油液.•最大泄漏量5滴/分.•复位压力为设定压力的85%.内部导通SUNProduct/CompanyIntroductionSeminarCounterbalanceCartridgeValves©2009SunHydraulicsCorporation8CC**无先导口平衡阀典型回路•Sun直动式(溢流)平衡阀(CC**)实际是作为一个背压阀运行,用以防止负载带动液压泵。同时也在液压缸伸出和收回状态切换过程中对负载控制。此阀对油缸提供溢流保护,防止外界突然的冲击.(低流量等级).注意:和先导式的平衡阀相比,这里需要更高的压力.GoToSUNProduct/CompanyIntroductionSeminarCounterbalanceCartridgeValves©2009SunHydraulicsCorporation9A2A1A3•弹簧力关闭油口•A3–A2除以A2–A1就是平衡阀的先导比•1口的压力可以通过A2–A1处打开阀芯,起溢流作用先导比=(A2-A1)(A3-A2)基本结构参数:CB**型标准平衡阀基本运行参数SUNProduct/CompanyIntroductionSeminarCounterbalanceCartridgeValves©2009SunHydraulicsCorporation10工作原理CB**标准平衡阀自由流油口2-1231油口1–负载口油口2–自由口油口3–先导口OperationAnimation:Slide1of5Legend:IntensifiedPressureTankPressureOperatingPressurePilotPressureSUNProduct/CompanyIntroductionSeminarCounterbalanceCartridgeValves©2009SunHydraulicsCorporation11工作原理CB**标准平衡阀带载工作油口1-2OperationAnimation:Slide2of5油口1–负载口油口2–自由口油口3–先导口Legend:IntensifiedPressureTankPressureOperatingPressurePilotPressure231SUNProduct/CompanyIntroductionSeminarCounterbalanceCartridgeValves©2009SunHydraulicsCorporation12231工作原理CB**标准平衡阀OperationAnimation:Slide3of5油口1–负载口油口2–自由口油口3–先导口Legend:IntensifiedPressureTankPressureOperatingPressurePilotPressure带载工作油口1-2SUNProduct/CompanyIntroductionSeminarCounterbalanceCartridgeValves©2009SunHydraulicsCorporation13工作原理CB**标准平衡阀OperationAnimation:Slide4of5油口1–负载口油口2–自由口油口3–先导口Legend:IntensifiedPressureTankPressureOperatingPressurePilotPressure带载工作油口1-2231SUNProduct/CompanyIntroductionSeminarCounterbalanceCartridgeValves©2009SunHydraulicsCorporation14工作原理CB**标准平衡阀OperationAnimation:Slide5of5油口1–负载口油口2–自由口油口3–先导口Legend:IntensifiedPressureTankPressureOperatingPressurePilotPressure带载工作油口1-2231SUNProduct/CompanyIntroductionSeminarCounterbalanceCartridgeValves©2009SunHydraulicsCorporation15阀设定值,泵压力,先导比在典型回路中的计算例子:•负载转换压力=2450psi•阀设定值=3200psi(1.3X2450psi)•先导比=3:1•泵压力值,直接作用于无杆腔=3200–2450=250psi3(先导比)(此处假设2口压力=0psi)LOAD注意:简化计算SUNProduct/CompanyIntroductionSeminarCounterbalanceCartridgeValves©2009SunHydraulicsCorporation16CB**系列先导比总览•半限流先导比模型,流量等级大致为标准的60%。•使用于低流量场合,且之前不稳定或者有噪音问题。•所有半限流全限流模型都是内部密封式的。•标准3口和4口的平衡阀都是先导密封式。GoToSUNProduct/CompanyIntroductionSeminarCounterbalanceCartridgeValves©2009SunHydraulicsCorporation17系列2,各平衡阀的通流面积比较SUNProduct/CompanyIntroductionSeminarCounterbalanceCartridgeValves©2009SunHydraulicsCorporation182口背压的作用效果•标准平衡阀的2口背压,将额外增加阀工作压力,增加1口和先导口压力都变大.例如:使用3:1平衡阀,当存在300psi背压情况下,增加的设定值将等于(1+3)X300,or1200psi!SUNProduct/CompanyIntroductionSeminarCounterbalanceCartridgeValves©2009SunHydraulicsCorporation19CBCA-***PerformanceDataElectronicallySimulatedApplicationDemonstratingBackpressureAffectsSUNProduct/CompanyIntroductionSeminarCounterbalanceCartridgeValves©2009SunHydraulicsCorporation20CW**-L**,4口先导泄油式平衡阀,带先导口•4口带先导口平衡阀不会受到2口背压影响.•4口的压力将直接作用在阀的溢流值上。这个效果等于(1+先导比)X背压.•允许下流有节流限制.SUNProduct/CompanyIntroductionSeminarCounterbalanceCartridgeValves©2009SunHydraulicsCorporation21ModelCW**4口平衡阀典型回路由于出油口会给标准型平衡阀带来背压,所以这里采用了4口先导泄油的平衡阀(CW**).这里背压所造成潜在的不稳定因素将不存在.先导泄油口需直接回油箱(如此处有压力,也将会给平衡阀带来背压).LOADSUNProduct/CompanyIntroductionSeminarCounterbalanceCartridgeValves©2009SunHydraulicsCorporation22CA*A-L**,3口平衡阀,带先导口,外通大气•该外通大气型平衡阀可以消除2口背压对阀设定值的影响•和CW**具有同样的性能,利用外通大气代替了4口回油.•Although尽管弹簧腔作了较好的密封,但是一定运行周期后都会产生较少量(几滴)的泄漏.SUNProduct/CompanyIntroductionSeminarCounterbalanceCartridgeValves©2009SunHydraulicsCorporation23CA**,通大气型平衡阀典型回路由于原先没有考虑到背压情况,采用了标准3口标准式的平衡阀;为解决此类问题,我们可以选用Sun通大气型平衡阀(CA**)替换之.这种通大气型的平衡阀并不是我们推荐选用的产品,因为它存在泄漏。(平均每4000个运行周期会产生1滴的泄漏)所以,4口,CW**,是我们推荐使用的型号。SUNProduct/CompanyIntroductionSeminarCounterbalanceCartridgeValves©2009SunHydraulicsCorporation24标准负载平衡阀GoToSUNProduct/CompanyIntroductionSeminarCounterbalanceCartridgeValves©2009SunHydraulicsCorporation25MB**改良负载控制型LoadReactive,3PortLoadReactive,4PortNon-LoadReactive,3PortNon-LoadReactive,4PortSUNProduct/CompanyIntroductionSeminarCounterbalanceCartridgeValves©2009SunHydraulicsCorporation26系列2,负载控制阀增益对比Applicabletoloadreactiveandnon-loadreactivecartridges.SUNProduct/CompanyIntroductionSeminarCounterbala
本文标题:09a-平衡阀
链接地址:https://www.777doc.com/doc-6835873 .html