计算项目选取值计算公式设计要求直径d(mm)流量Qg(L/Min)流速Vq(m/s)13.36565873506直径D1(mm)直径d(mm)(0.3~4)mm,是考虑便于阀座的拆卸14151直径D2(mm)直径D1(mm)A1/A2(一般取0.95~0.98,流量小取大值,流量大取小值)14.36369693140.95配合长度L(mm)主阀芯直径D2(mm)(0.6~1.5)小D2取大值,大D2取小值40401(0.8~2)mm,流量小取小值,流量大取大值0.8阻尼孔长度l0(mm)阻尼孔直径d0(mm)(7~19)mm,流量小取小值,流量大取大值6.40.88S≥X1x(在卸荷时主阀芯开口量)间距S(mm)主阀座孔径D1(mm)流量Qq(L/Min)半角α1(°)卸荷压力P1x(kgf/cm2)X1x=44.7*Qq/1000/((D1/10*sinα1)*P1x^0.5)61450304开口量X10(mm)流量Qg(L/Min)流量系数C1,取0.77~0.8直径D1(mm)半角α1(°)重力加速度g(cm/s2)最高额定压力P1max(kgf/cm2)油液重度γ(kgf/cm3有温度等条件限制)#DIV/0!500.814309803200开口量X1X(mm)流量Qg(L/Min)流量系数C1,取0.77~0.8直径D1(mm)半角α1(°)重力加速度g(cm/s2)卸荷压力P1x(kgf/cm2)油液重度γ(kgf/cm3有温度等条件限制)3.075073135500.8141598040.000885[P1Q],主阀开启压力,根据设计要求规定[P1Q]≥0.95P1max(kgf/cm2)0.8[Q],开启压力为[P1Q]时的溢流量,根据设计要求规定[Q]≤0.01(16.67Qg)(cm3/s),取26ml/s阻尼孔面积a0(mm)内泄漏量Qnx≤150ml/min阻尼孔直径d0(mm)阻尼孔长度l0(mm)8公称压力Pg=30kgf/cm2公称流量Qg=150L/Min调压范围P1=160~320kgf/cm2启闭特性(调成最高调定压力时)开启压力[P1Q]=300kgf/cm2闭合压力[Pˊ1Q]=288kgf/cm2溢流量[Q]=26(cm3/s)卸荷压力P1x=4kgf/cm2溢流量[Q](cm3/s)26重力加速度g(cm/s2)980主阀开启压力[P1Q](kgf/cm2)300油液重度γ(kgf/cm3有温度等条件限制)0.0008995[P2Q]=[P1Q]-(1.4γ*υ^0.5/g)([Q][Q]^0.5)*(((l0/10)^0.5)/(d0*a0/10000)/a0^0.5)α1一般取15°,主阀座阀口处为直角α1一般取20°d2=(2~5)*d0,一般取d2=4mm一般取d3=1.6mmX10=1667Qg/((C1πD1sinα1)(2gP1max/γ)^0.5)X1x=1667Qg/((C1πD1sinα1)(2gP1x/γ)^0.5)d≥4.63*(Qq/Vq)^0.5D1=d-(0.3~4)D2=D1*(A2/A1)^0.5L=(0.6~1.5)*D2d0=0.8~2l0=(7~19)*d06.378277.563062041.60.7203151440400.8813.卸荷压力P1x下主阀芯开口量X1x14.系统压力为开启压力[P1Q]时导阀前油腔压力[P2Q]7.主阀芯阀口锥角半角α18.主阀芯与阀盖的间距S9.导芯阀口锥角半角α210.导阀阀座孔径d211.导阀阀座孔径d312.最高额定压力P1max下主阀芯开口量X101.进出油口直径计算d2.主阀座孔径D13.主阀芯直径D24.主阀芯与阀套配合长度L5.阻尼孔直径d06.阻尼孔长度l0计算过程数据导阀前腔压力[P2Q](kgf/cm2)274.0911997油液运动粘度υ(cm2/s)0.235a0,阻尼孔面积,a0=πd02/4(cm2)0.5026548258269803000.0008995277.5614.系统压力为开启压力[P1Q]时导阀前油腔压力[P2Q]274.09119970.235液压卡紧力FK(kgf)液压卡紧系数λK(0.4,0.06,0.027)摩擦系数f=0.04~0.08直径D2(mm)主阀芯与阀套配合长度L(mm)2.5899678720.0270.084040弹簧受力KT1*XT1(kgf)A1(cm2)=π*D1*D1/400[P1Q](kgf/cm2)[P2Q](kgf/cm2)重力G(kgf),取G=0.2FK(kgf)-3027.2142081.5393804300277.560.20.9065预压缩量XT1(mm)(1~5),取1.59.5671.56.378主弹簧刚度KT1(kgf/mm)弹簧受力KT1*XT1(kgf)预压缩量XT1(mm)0.781257.59.6开口量X2Q(mm)流量[Q](ml/s)流量系数C1,取0.77~0.8直径d2(mm)半角α2(°)重力加速度g(cm/s2)最高额定压力P2Q(kgf/cm2)油液重度γ(kgf/cm3有温度等条件限制)0.031945904260.77420980277.560.0008995预压缩量XT2(mm)开口量X2Q(mm)3.20.032调压弹簧刚度KT2(kgf/mm)a2(cm2)=π*d2*d2/400流量系数C2,取0.77~0.8直径d2(cm)半角α2(°)开口量X2Q(cm)预压缩量XT2(cm)导阀前腔压力[P2Q](kgf/cm2)10.762888050.1256637060.770.4200.00320.32277.56KT2XT2/(a2*P1max2)调压弹簧刚度KT2(kgf/mm)预压缩量XT2(mm)a2(cm2)=π*d2*d2/400P1max2(kgf/cm2)0.85943669310.83.20.125663706320闭合压力Pˊ1Q(0.95~0.98),取0.965闭合压力P1Q289.50.965300预压缩量XT1(cm)开口量X1X(cm)重力G(kgf),取G=0.2FK(kgf)主弹簧刚度KT1(kgf/cm)0.960.63780.20.90658流量系数C1,取0.77~0.8直径D1(cm)半角α1(°)0.81.430溢流量Q1min(L/min)流量系数C1,取0.77~0.8直径D1(cm)半角α1(°)重力加速度g(cm/s2)油液重度γ(kgf/cm3有温度等条件限制)9.85477237913.93675275泄漏量Qnx(L/Min)直径D2(cm)单边间隙△r3(cm)Pg(kgf/cm2)配合长度L(cm)均压槽数Z均压槽宽度b(cm)油液动力粘度μ(kgf*sec/cm2)0.00909379540.0011531.5470.050.00000022650.000899530980-34.368863020.81.4预压缩量XT2,X2Q/XT2≤0.01,取XT2=X2Q/0.01刚度KT2=(a2-(C2πd2sinα2)X2Q)P2Q/10(XT2+X2Q)根据KT2XT2/(a2*P1max)≥0.85~0.90的要求校核,经计算,符合要求Pˊ1Q=(0.95~0.98)P1Q取导阀油腔压力P2≈0,P1min==(KT1(XT1+X1X)+G+FK)/(A1-C1πD1X1Xsin2α1)X10=3*(C1πD1sinα1)(2gP1/γ)^0.5)/10000Fk=0.27f*λK*L*D2*P2Q/100主弹簧受力KT1*XT1=A1*[P1Q]-A2*[P2Q]-G-FK预压缩量XT1=(1~5)*X1x主弹簧刚度KT1=KT1*XT1/XT1X2Q=[Q]/((C2πd2sinα2)(2gP2Q/γ)^0.5)0.0323.210.8校核3.23.90.90657.59.60.819.调成最高压力时的闭合压力Pˊ1Q20.最低调定压力P1min21.最小溢流量Q1min22.内泄漏量Qnx15.液压卡紧力FK16.主弹簧刚度KT1和预压缩量XT117.系统压力为开启压力[P1Q]时导阀开口量[X2Q]18.调压弹簧刚度KT2和预压缩量XT2A1(cm2)=π*D1*D1/4001.5393804压力调定极限P1(kgf/cm2)1603209.838~13.9130.143Qnx=0.654*D2*△r3*Pq/(16.67μ(L-Z*b))最低调定压力P1min(kgf/cm2)导阀前腔压力[P2Q](kgf/cm2)277.56A2(cm2)=π*D2*D2/40012.56637061卸荷压力P1x下主阀芯开口量X1x红底色输入参数黄底色输入选定值