先导式二级同心溢流阀课程设计

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额定流量Qs(L/min)额定压力Ps(MPa)卸荷压力[Pu](MPa)运动黏度v(m2/s)20031.50.43.00E-05几何尺寸D(m)取标准值Dp(m)取标准值DT(m)D1(m)0.0265961520.0280.0320.0275L=(0.6~1.5)Dx取L值主阻尼孔径d1=0.6~2长度l1=(7~19)d10.0210.020.00070.01067024Xu(m)Pu1取H(Xu)(m)Xs(m)6.25E-033.72E+057.00E-037.04E-04△Pk(Pa)△P3(Pa)P2'(Mpa)Fk1=下面的值1.22E+062.69E+0429.017821.05995114取Y0FfyK2K2Y00.00356985.36909.98E+04356.3100导阀前腔压力P2s(Pa)Q2S(m3/s)Q2S单位化为L/minQ2s相对于[Q]的误差3.020E+072.55E-051.53022.01%Pb(Pa)Pb单位化为Mpa判断Pb是否大于[P1b]Pb/Ps3.03E+073.03E+01合格0.962Qmin(PS)(m3/s)Qmin(PS)单位化为L/minQmin是否合格Xmin1.83E-0410.97合格3.86E-05X(0)=XSY(0)=Y'7.04E-042.97E-05iP2(i)(Pa)P(i)(Pa)Q2(i)(m3/s)12.40E+054.33E+053.95E-0624.21E+051.03E+061.25E-0531.04E+061.66E+061.27E-0546.61E+051.07E+068.42E-0655.45E+059.91E+059.12E-0666.54E+051.15E+061.02E-0576.68E+051.14E+069.67E-0686.26E+051.09E+069.44E-0696.31E+051.10E+069.65E-06106.43E+051.12E+069.68E-06116.39E+051.11E+069.60E-06126.36E+051.11E+069.61E-06取Pmin=P(12)(Mpa)1.106迭代计算Pmin几何尺寸计算按开启条件计算计算额定工况阻尼孔流量其它主要参数运动黏度μ许用流速[v](m/s)C12.70E-0260.8Ax/A1DxDx取标准值1.04170.02810.028α1α2d315200.0016Red11515.761363取Fk1(N)K1X0(N)取X0=1.5Xu(m)2170.509.38E-03A2PS(N)K2Y0/(A2PS)判断K2Y0/(A2PS)=0.85~0.9395.84070.9001符合Q2S与[Q]是否差别不大Ys(与Y'差不多)判断XS与Ys是否都大于dH符合题意2.97E-05满足Pk判断Pk是否大于[P1k]Pmax(pa)3.02E+07合格3.15E+07Xmin△=(1.5~3)dHq(m3/s)偏小2.00E-059.09799E-06Y(i)(m)X(i)(m)5.16E-056.01E-031.23E-043.89E-037.99E-053.07E-036.64E-053.82E-037.92E-053.97E-038.07E-053.68E-037.59E-053.70E-037.65E-053.79E-037.79E-053.76E-037.73E-053.74E-037.70E-053.75E-037.73E-053.76E-032000C2流体密度ρ(Kg/m3)度化弧度[Q]=0.0075Qs0.779000.0174532931.5返代入得A1/Ax(一般为0.95~0.98)0.965l3=(3~5)d3d20.00640.004则K1(N/m)Y'(m)判断Y'是否符合(dH)7.52E+032.97E-05符合Pmax单位化为Mpa判断Pmax是否大于Ps31.54满足q单位化为cm3/s判断q是否小于[q]9.10满足[P1k](Mpa)m1g(N)dH(m)[P1b](Mpa)[q](cm3/s)Ce30.2421.00E-0528.35151

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