平衡盘计算表(280-100)完整版

基本参数(用于平衡盘计算)泵型号最大级数流量（m3/h）单级扬程m转数nr/minMD280-100X2~1010.00280.00100.002980.00叶轮出口直径D2轮毂直径Dh（m）首级叶轮进口直径Dj0次级叶轮进口直径Dj0.2850.105175.00150.00比转速ns首级叶轮密封环直径Rm0次级叶轮密封环直径Rm95.9397.2084.70水力效率ηh叶轮动扬程Ht势扬程Hp首级叶轮轴向力1次级叶轮轴向力0.8724114.6282.0713273.198571.08压力计算容积效率ηv首级叶轮动反力2次级叶轮动反力末级叶轮出口压力P2(kPa)0.9686418.91715.51630839624.24首级叶轮轴总向力次级叶轮轴总向力间隙b1进口处压力P3(kPa)U2Uh12854.297855.569410.6244.4716.38平衡盘后面轮毂处压力P6≈P5（kPa）49.00平衡机构前后压力降△P（kPa）9361.62轴向力计算假设尺寸估计的平衡鼓轴向力R0(根据结构定)(mm)b1(mm)b2(mm)0.0052.500.500.18轴向力F（N）计算fR1minR1max选取R183554.333.092393.1797.4195.00R2minR2max选取R2150.00225.00135.00校核假设尺寸B0=R0/R2B1=R1/R2进口阻力系数ζ`=0.15~0.25摩擦阻力系数λ2=0.04~0.060.3890.7040.200.05压降系数计算φ0.261令Φ2.01灵敏度系数K（应在0.3~0.5内）0.300泄漏量计算泄漏量q(L/S)径向间隙阻力系数ζ2q/Q(应5%)3.7519418974.604.82%径向间隙长度L1λ1=0.04~0.06ξ'1=0.3~0.5478.57089440.050.4