集装箱船螺旋桨设计计算说明书.doc

集装箱船螺旋桨设计计算说明书 班级：船舶11-3 学号： 姓名：孙凯凯 指导老师：刘大路1.已知船体的重要参数设计水线长 Lwl=91.6垂线间长 Lpp=90.0m型宽 B = 16.7m设计吃水 T = 5.3m排水体积 =6253.2m排水量 = 6409.6t方型系数 CB = 0.785桨轴中心距基线高度 Zp = 1.90m棱形系数 Cp = 0.790由模型实验提供的船体有效马力曲线数据如下：航速V（kn） 1011121314有效马力PE（hp）763 1066 1535 225419222. 主机参数 主机功率 Ps=2900kw主机转速 N = 755r/min转向 右旋减速比 i=3.355:1传递效率 s=0.97(已将减速箱考虑在内）3.相关推动因子伴流分数 w = 0.3425推力减额分数 t = 0.275相对旋转效率 R = 1.0船身效率 4.可以达成最大航速的计算采用MAU四叶桨图谱进行计算。取功率储备10%，轴系效率s = 0.97螺旋桨敞水收到马力：PD = =0.929001.360.971.0=2531.7hpr/min根据MAU4-40、MAU4-55、MAU4-70的-图谱列表计算：项 目单位数 值假定航速Vkn11121314VA=(1-w)V kn7.23257.898.54759.205Bp=NPD0.5/VA2.596.352677.51663.45852.7269.8168.2397.9667.261MAU4-40106.597.589.883P/D0.5620.5750.5920.612O0.4510.47750.5050.525PTE =PDHOhp1712.2611812.8701917.2771993.208MAU4-5510696.588.581.8P/D0.5980.6150.6350.655O0.43320.460.4870.51PTE =PDHOhp1644.6821746.4301848.9381936.260MAU4-70104.595.587.580.67P/D0.60.6180.6380.661O0.421.44750.47250.495PTE=PDHOhp1594.5671698.9731793.8871879.311据上表的计算结果可绘制PTE、P/D及O对V的曲线，如下图所示。 从PTEf(V)曲线与船体满载有效马力曲线之交点，可获得不同盘面比所相应的设计航速及螺旋桨最佳要素P/D、D及O如下表所列。MAU Vmax P/DDO4-4013.910.5885.63.300.534-5513.780.62385.63.270.4964-7013.710.63184.93.220.4795.空泡校核按柏利尔空泡限界线中商船上限线，计算不发生空泡之最小展开面积比。桨轴沉深 hs =TZp=5.11.90=3.2mp 0p v = pa + hspv = 10300+10253.2-174 = 13406kgf/m2计算温度t = 15C ,Pv = 174kgf/ m2 , PD = 3443.1hp, = 104.63kgfs2/m4序号项目单位数值MAU4-40MAU4-55MAU4-701VmaxKn13.9113.7813.712VA=0.5144Vmax(1-w)m/s4.584.544.513(0.7ND/60)2(m/s)2780.63766.5743.244V20.7R=V2A+（序号3)(m/s)2801.77787.11763.585=(p 0- p v) / V0.7R20.320.3250.3366c0.130.1350.1427T=PDO75/VAkgf29882.828212.227426.58AP=T /V0.7R2cm25.485.084.849AE=AP / (1.067-0.229P/D)m25.875.505.2410AE/AO=AE /D20.690.650.64按上述结果作图如下,可求得不发生空泡的最小盘面比以及相应的最佳螺旋桨要素AE / AO = 0.64 P/D= 0.63 D=3.24m o=0.48 Vmax= 13.73kn 6.强度校核按2023年校核t0.25R及t0.6r,应不小于按下式计算之值: t=, , X=A2GAdN2D3/1010Zb计算功率Ne=39440.97=3826hpAd = AE / AO =0.64, P/D= 0.63 , ，G=7.6g/cm3 ,N=ne=231r/minb0.66R =0.226DAd/(0.1Z)=0.2263.240.640.4=1.1716mb0.25R=0.7212b0.66R = 0.845mb0.6R =0.9911b0.66R = 1.1612m项 目单 位数 值0.25R0.6R弦长bm0.8451.1612K1634207K2250151K31410635K4434A1=D/P(K1-K2D/P0.7)+K3D/P0.7-K439221494Y=A1Ne/(Zbne)19218.695327.42K58223K63412K74165K8380330A2=D/P(K5+K6)+K7+K81358.791038.89材料系数K（铝镍合金）1.1791.179X=A2GAdN2D3/1010Zb0.3550.197mm152.7273.66MAU标准桨叶厚度tmm123.970.6校核结果不满足规定不满足规定 实取桨叶厚度mm15374实取桨叶厚度按t1.0R=0.0035D=11.34mm与t0.25R=153mm连直线决定:t0.2R =162.4mm t0.3R =143.6mm t0.4R = 134.7mm t0.5R =105.8mm t0.6R = 86.9mm t0.7R = 67mmt0.8R = 49.1mm t0.9R = 30.2mm7.螺距修正根据尾轴直径大小，决定毂径比dh/D=0.18，此值与MAU桨标准毂径比相同，故对此项螺距无需修正。由于实际桨叶厚度大于MAU桨标准厚度，故需因厚度差异进行螺距修正。设计桨 0.7R =0.067/(0.99641.1716)=0.05739标准桨 0.7R = 0.01713.24/(0.99640.36163.24)=0.04746 (取MAU455为基准桨）1s = =0.6413.7330.866/（2312.0412）=0.57440.7R =0.7R设0.7R标0.75=0.012453 t=20(1s) 0.7R =-20.630.57440.012453 =-0.009013修正后的螺距比：=0t =0.63+0.009013=0.648.重量及惯性矩计算桨叶重桨毂重螺旋桨重量2688.23+869.22=2557.45螺旋桨惯性矩=19304.79.敞水特性曲线由于校核后所得盘面比AE / AO = 0.64，所以无需由MAU4-55,MAU4-70,P/D=0.63 的敞水特性曲线内插得到MAU4-64,P/D= 0.63 的敞水特性曲线，可以直接从课本附录中MAU4-55KT,KQ-J图查得数据，其数据如下： 设计桨的敞水特性数据表J00.20.40.610KQ0.280.23280.16680.1181KT0.27590.21570.13780.0502 设计桨的敞水性征曲线 10. 系柱特性计算 由上图得J=0时，KT=0.2759，KQ=0.028. 计算功率 PD=39440.97=3825.68hp 系柱推力减额分数取t0=0.04 主机转矩 系数推力 螺旋桨转速 11.螺旋桨计算总结螺旋桨直径 D=3.24m螺距比 P/D=0.64 型式 MAU 叶数 Z=4 盘面比 AE/A0=0.64 纵倾角 螺旋桨效率 o=0.48 设计航速 Vmax= 13.73kn 毂径比 dh/D=0.18旋向 右旋材料 铝镍青铜重量 2557.45kg惯性矩 19304.7kgfcms2