螺旋桨设计计算说明书模版

1、 某沿海单桨散货船螺旋桨设计计算说明书1.已知船体的主要参数船长 L = 118.00 米型宽 B = 9.70 米设计吃水 T = 7.20 米排水量 = 5558.2 吨方型系数 CB = 0.658桨轴中心距基线高度 Zp = 3.00 米由模型试验提供的船体有效马力曲线数据如下：航速V（kn） 13141516有效马力PE（hp）2160 2420 3005 40452.主机参数型号 6ESDZ58/100 柴油机额定功率 Ps = 5400 hp额定转速 N = 165 rpm转向 右旋传递效率 s=0.983.相关推进因子伴流分数 w = 0.279推力减额分数 t = 0.223

2、相对旋转效率 R = 1.0船身效率 4.可以达到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 = 0.98螺旋桨敞水收到马力：PD = （1-10%）PssR =4762.8 hp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Vkn13141516VA=(1-w)VKn9.37310.09410.81511.536Bp=NPD0.5/VA2.542.3368535.1768429.6038925.192836.5066785.9310075.4409465.019246MAU4-4076.470.665.261P/D0

3、.6410.6630.6840.72O0.5590.5820.6050.626PTE =PDHOhp2867.412985.393103.3693211.089MAU4-5574.267.863.658.8P/D0.6620.70.7240.745O0.5470.5630.590.615PTE =PDHOhp2805.8562887.9293026.4263154.664MAU4-7072.866.461.856.3P/D0.6820.7230.7560.785O0.5260.5490.5710.59PTE=PDHOhp2698.1362816.1152928.9653026.426据上表的计

4、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对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/DDO4-4015.0750.68864.84.2685820.6054-5514.9750.7363.54.1551990.594-7014.8250.74563.24.0941440.5685.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 hf =TZp=7.23.00=4.2mp 0p v = pa + hspv = 10300+10254.2-174 =

5、 14461kgf/m2计算温度t = 15C ,Pv = 174kgf/ m2 , PD = 4762.8hp, = 104.63kgfs2/m4序号项目单位数值MAU4-40MAU4-55MAU4-701VmaxKn15.07514.97514.8252VA=0.5144Vmax(1-w)m/s5.5910525.5539645.4983323(0.7ND/60)2(m/s)2666.39631.4587613.0384V20.7R=V2A+（3）(m/s)2697.6499662.3052643.26975=(p 0- p v) / V0.7R20.3962180.4173630.429

6、7146c0.1630.1710.187T=PDO75/VAkgf38653.237946.5736901.248AP=T /V0.7R2cm26.4973176.4046016.091859AE=AP / (1.067-0.229P/D)m27.1442437.1175676.79594410AE/AO=AE /D20.4992280.5248770.516219按上述结果作图,可求得不发生空泡的最小盘面比以及对应的最佳螺旋桨要素AE / AO = 0.54 P/D= 0.728 D=4.168 o=0.588 Vmax= 14.76 kn 6.强度校核按1983年校核t0.25R及t0.6

7、r,应不小于按下式计算之值: t=, , X=A2GAdN2D3/1010Zb计算功率Ne=54000.98=5292hp AD = AE / AO =0.54, P/D=0.728 , ，G=7.6gf/cm3 ,N=165rpmb0.66R =0.226DAE / AO/0.1Z=1.27165b0.25R=0.7212b0.66R = 0.9171b0.6R =0.9911b0.66R = 1.2603项 目单 位数 值0.25R0.6R弦长bm0.91711.2603K1634207K2250151K31410635K4434A1=D/P(K1-K2D/P0.7)+K3D/P0.7-K

8、42390.584861.1727Y=A1Ne/ZbN20900.815478.885K58223K63412K74165K8380330A2=D/P(K5+K6)+K7+K81194.2641013.462材料系数K（铝镍合金）1.1791.179X=A2GAdN2D3/1010Zb0.2633790.162642mm151.085973.4214MAU标准桨叶厚度tmm159.569116.704校核结果实取桨叶厚度mm159.56991.8实取桨叶厚度按t1.0R=0.0035D=0.0354.168m =14.588mm 与t0.25R=151.087 连直线决定:t0.2R = 16

9、8.8mm t0.3R = 149.5mm t0.4R = 130.1mm t0.5R = 110.5t0.6R = 91.8mm t0.7R = 72.6mmt0.8R = 52.3mm t0.9R = 33.4mm7.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 =标准桨 0.7R = 1s = =0.7R =0.7R设0.7R标0.75=-0.00169t=20(1s) 0.7R =0.00161修正后的螺距比：=0t =0.728+0.00161=0.729618.重量及惯性矩计算根据MAU桨切面的面积数据用积分方法计算得： 桨叶重量 8210.984 桨毂重量 螺旋桨重量 桨叶惯性矩 0.1298693 桨毂惯性矩 螺旋桨总惯性矩 9.敞水特性曲线由MAU4-40,MAU4-55,P/D=0.728的敞水特性曲线内插得到MAU4-54,P/D=0.728 的敞水特性曲线，其数据如下：设计桨