螺旋桨设计计算说明书.doc

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 = =0.954000.981.0=4762.8hp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)V kn9.37310.09410.81511.536Bp=NPD0.5/VA2.542.33735.17729.60425.1936.5075.9315.4415.019MAU4-4076706461P/D0.620.650.690.71O0.560.5830.6050.625PTE =PDHOhp2874.412992.463105.393208.04MAU4-5574686360P/D0.70.720.740.76O0.5410.5680.590.61PTE =PDHOhp2776.882915.473028.393131.05MAU4-7074676259P/D0.710.730.760.78O0.5210.5460.570.588PTE=PDHOhp2674.232802.552925.743018.13据上表的计算结果可绘制PTE、P/D及O对V的曲线，如图1所示。（见所附坐标纸） 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/DDO4-4015.10.6963.54.190.614-5515.00.74634.130.594-7014.80.75562.54.040.565.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 = 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MAU4-40MAU4-55MAU4-701VmaxKn15.11514.82VA=0.5144Vmax(1-w)m/s5.65.565.493(0.7ND/60)2(m/s)2641.43623.19596.334V20.7R=V2A+32(m/s)2672.79654.14626.465=(p 0- p v) / V0.7R20.410.420.446c0.1650.1670.1737T=PDO75/VAkgf38908.1237883.3236442.968AP=T /V0.7R2cm26.706.636.439AE=AP / (1.067-0.229P/D)m27.377.397.1910AE/AO=AE /D20.5340.5510.561按上述结果作图2(见所附坐标纸),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 = 0.55 P/D= 0.74 D=4.13m o=0.59 Vmax= 15.0kn 6.强度校核按1983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=54000.98=5292hpAD = AE / AO =0.55 , P/D= 0.74 , ，G=7.6gf/cm3 ,N=165rpmb0.66R =0.226DAE / AO/0.1Z=0.2264.130.550.4=1.2834mb0.25R=0.7212b0.66R = 0.9256b0.6R =0.9911b0.66R = 1.2720项 目单 位数 值0.25R0.6R弦长bm0.92561.272K1634207K2250151K31410635K4434A1=D/P(K1-K2D/P0.7)+K3D/P0.7-K42301.62828.09Y=A1Ne/ZbN19938.255219.94K58223K63412K74165K8380330A2=D/P(K5+K6)+K7+K81186.381010.81材料系数K（铝镍合金）1.1791.179X=A2GAdN2D3/1010Zb0.2570.159mm147.0571.55MAU标准桨叶厚度tmm15890校核结果满足要求满足要求 实取桨叶厚度mm16092实取桨叶厚度按t1.0R=0.0035D=14.46mm与t0.25R=160mm连直线决定:t0.2R = 169.7mm t0.3R =150.3mm t0.4R = 130.9mm t0.5R =111.5mm t0.6R = 92.1mm t0.7R = 72.7mmt0.8R = 53.3mm t0.9R = 33.9mm7.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 =0.0727/(0.99641.2834)=0.05685标准桨 0.7R = 0.01714.13/(0.99640.310754.13)=0.055221s = =0.7211530.866/165/3.0526=0.66280.7R =0.7R设0.7R标0.75=-0.0000055t=20(1s) 0.7R =-20.740.6628(-0.0000055)=0.000005395修正后的螺距比：=0t =0.74+0.000005395=0.748.重量及惯性矩计算每叶片重量=（1/31.613952102.065+0.1660.022.065）7600=896.39kgf4个叶片重量=4896.39=3585.56kgf桨毂重量=2835.8kgf整个螺旋桨重量=3585.56+2835.8=6421.36kgf每叶片体积惯性矩=1/32.065101.951+0.1660.022.0650.192.0650.192.065=0.135m5每叶片质量惯性矩=7600/9.80.135=104.7kgfms24个叶片质量惯性矩=4104.7=418.8 kgfms2桨毂转动惯性矩=34.3 kgfms2整个螺旋桨的惯性矩=418.8+34.3=453.1 kgfms2=45310kgfcms2（1）（2）（3）（4）（5）（6）（7）（8）（9）（10）r/R面积系数Ka弦长最大厚度 bt切面面积(m2)S=Kabt辛式系数SM(4)(5)rr2(6)(7)(6)(8)0.20.6740.8540.16770.09710.0970.4130.1710.0400.0160.30.6740.0970.14830.09940.3960.6200.3840.2470.1530.40.6741.1180.12890.09720.1940.8260.6820.1600.1330.50.67451.210.10940.08940.3561.0321.0660.3680.3810.60.67451.2710.090.07720.1541.2391.5350.1910.2370.70.6771.2790.0710.06140.2441.4462.0890.3550.5140.80.6831.1930.0510.04220.0841.6522.7290.1370.2270.90.6950.9450.0320.02140.0821.8593.4540.1560.29010.700.01240102.0654.26400(6)=1.614(9)=1.656(10)=1.9519.敞水特性曲线由于校核后所得盘面比AE / AO = 0.55，所以无需由MAU4-40,MAU4-55,P/D=0.74 的敞水特性曲线内插得到MAU4-55,P/D= 0.74 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J00.10.20.30.40.50.60.710KQ0