船舶螺旋桨的设计与计算过程

1、 某沿海单桨散货船螺旋桨设计计算说明书刘磊磊2008101320 2011年7月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=0.9

2、83.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 = 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)V kn9.37310.09410.81511.536Bp=NPD0.5/VA2.569.01304269.0130469.0130422569.01304225268.96548323.7116384.65

3、05072451.9996707MAU4-4075.672.1087864.8797736960.744P/D0.640.6673210.6854205610.720498O0.55833330.5827810.6057068060.62606PTE =PD·H·Ohp2863.99072989.3953106.9946263211.4377MAU4-5574.62912168.6357663.5658914759.341025P/D0.68600640.7130990.7409584660.7702236O0.54142170.5671380.5909414380.611

4、1996PTE =PD·H·Ohp2777.24192909.1563031.2551443135.1705MAU4-7073.77256367.7718563.0305555658.68503P/D0.692540.7231620.7542806390.7861101O0.52107250.545710.5657927790.5828644PTE=PD·H·Ohp2672.86012799.2382902.25422989.8239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

5、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。MAUVmax P/DDO4-4015.1370.6891964.10064.2398766910.6086224-5515.0370.7420163.39984.1658191120.591738724-7014.8510.74960663.686884.1329199360.5630774265.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+1025×4.2-174 = 14461kgf

6、/m2计算温度t = 15°C ,Pv = 174kgf/ m2 , PD = 4762.8hp, = 104.63kgfs2/m4序号项目单位数值MAU4-40MAU4-55MAU4-701VmaxKn5.6140468895.5769586495.5079745222VA=0.5144Vmax(1-w)m/s657.4605465634.6935143624.70823133(0.7ND/60)2(m/s)2688.978069665.795982655.04601464V20.7R=V2A+32(m/s)20.4012053340.4151747440.4219881815=(

7、p 0- p v) / V0.7R20.4012053340.4151747440.4219881816c(柏利尔空泡限界图)0.160.1620.1633333337T=PD·O·75/VAkgf38725.3382337901.4802736517.39618AP=T /V0.7R2·cm26.7149627736.7169754016.5241950849AE=AP / (1.067-0.229P/D)m210AE/AO=AE /D27.3857718857.4876015217.286833423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

8、旋桨要素AE / AO = 0.549200516 P/D= 0.741852486 D= 4.166m o=0.591857369 Vmax= 15.03775 kn6.强度校核按1983年<<规范>>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=5400×0.98=5292hpAD = AE / AO = 0.549200516, P/D=0.741852486, ，G=7.6gf/cm3 ,N=165rpmb0.66R =0.226D·AE / AO/0.1Z=0.226*

9、0.549200516*4.166m/0.4=1.292702683 mb0.25R=0.7212b0.66R = 0.93229717 mb0.6R =0.9911b0.66R = 1.281197629 m项 目单 位数 值0.25R0.6R弦长bm634207K1250151K21410635K3434K42297.004326826.6232412A1=D/P(K1-K2D/P0.7)+K3D/P0.7-K419755.287085173.296683Y=A1Ne/ZbN8223K53412K64165K7380330K81185.1838161010.409249A2=D/P(K5+

10、K6)+K7+K81.1791.179材料系数K（铝镍合金）0.261120860.161991195X=A2GAdN2D3/1010Zb146.706353571.32164252mm159.349590.8188MAU标准桨叶厚度tmm满足要求满足要求校核结果146.706353585.04785519实取桨叶厚度mm634207实取桨叶厚度按t1.0R=0.0035D=14.581 与t0.25R=146.7063535 连直线决定:t0.2R = 155.5147104 mm t0.3R = 137.8979966 mmt0.4R = 120.2812828 mm t0.5R = 10

11、2.664569 mmt0.6R = 85.04785519 mm t0.7R = 67.43114139 mmt0.8R = 49.8144276 mm t0.9R = 32.1977138 mm7.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 =0.052351381标准桨 0.7R = 0.0552269751s = =0.6562626850.7R =0.7R设0.7R标××0.75=-0.002216992t=20(1s

12、) 0.7R =0.002158685修正后的螺距比：=0t =0.7440111718.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 3582.9355 kgf桨毂重量 6589.59094 kgf螺旋桨重量 10172.53 kgf桨叶惯性矩 435.6 kg.m.s2桨毂惯性矩 360.85 kg.m.s2螺旋桨总惯性矩 796.45 kg.m.s2（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)0.20.6740.145487857

13、0.098058810.0980590.41660.1735560.0408510.0170190.30.6740.1502219460.101249540.4049980.62490.39050.2530830.1581520.40.6740.14631570.098616720.1972340.83320.6942220.1643350.1369240.50.67450.1346355230.090811640.3632471.04151.0847220.3783210.3940220.60.67450.1163568310.078482620.1569651.24981.5620.196

14、1750.245180.70.6770.0917588040.062120740.2484831.45812.1260560.3623130.5282880.80.6830.0620510020.042380820.0847621.66642.7768890.1412470.2353740.90.6950.0305284290.021217240.0848691.87473.51450.1591040.29827210.700102.0834.3388890.0131030.027293(6)=1.638616(9)=1.69543(10)=2.01329.敞水特性曲线由MAU4-40,MAU4-55,P/D=0.7和0.8 的敞水特性曲线内插得到MAU4-0.549,P/D=0.744 的敞水特性曲线，其数据如下：设计桨的敞水特性数据表J00.10.20.30.40.50.60.710KQ0.36110.324680.288260.2