船舶螺旋槳的設計與計算過程

1、 某沿海單槳散貨船螺旋槳設計計算說明書劉磊磊2008101320 2011年7月某沿海單槳散貨船螺旋槳設計計算說明書1.已知船體的主要參數(shù)船長 L = 118.00 米型寬 B = 9.70 米設計吃水 T = 7.20 米排水量 = 5558.2 噸方型系數(shù) CB = 0.658槳軸中心距基線高度 Zp = 3.00 米由模型試驗提供的船體有效馬力曲線數(shù)據(jù)如下：航速V（kn） 13141516有效馬力PE（hp）2160 2420 3005 40452.主機參數(shù)型號 6ESDZ58/100 柴油機額定功率 Ps = 5400 hp額定轉(zhuǎn)速 N = 165 rpm轉(zhuǎn)向 右旋傳遞效率 s=0.9

2、83.相關推進因子伴流分數(shù) w = 0.279推力減額分數(shù) t = 0.223相對旋轉(zhuǎn)效率 R = 1.0船身效率 4.可以達到最大航速的計算采用MAU四葉槳圖譜進行計算。取功率儲備10%，軸系效率s = 0.98螺旋槳敞水收到馬力：PD = 4762.8 hp根據(jù)MAU4-40、MAU4-55、MAU4-70的-圖譜列表計算：項 目單位數(shù) 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 =PDHOhp2863.99072989.3953106.9946263211.4377MAU4-5574.62912168.6357663.5658914759.341025P/D0.68600640.7130990.7409584660.7702236O0.54142170.5671380.5909414380.6111996PTE =PDH

4、Ohp2777.24192909.1563031.2551443135.1705MAU4-7073.77256367.7718563.0305555658.68503P/D0.692540.7231620.7542806390.7861101O0.52107250.545710.5657927790.5828644PTE=PDHOhp2672.86012799.2382902.25422989.8239據(jù)上表的計算結(jié)果可繪制PTE、P/D及O對V的曲線，如下圖所示。從PTEf(V)曲線與船體滿載有效馬力曲線之交點，可獲得不同盤面比所對應的設計航速及螺旋槳最佳要素P/D、D及O如下表所列。MAU

5、Vmax P/DDO4-4015.1370.6891964.10064.2398766910.6086224-5515.0370.7420163.39984.1658191120.591738724-7014.8510.74960663.686884.1329199360.5630774265.空泡校核按柏利爾空泡限界線中商船上限線，計算不發(fā)生空泡之最小展開面積比。槳軸沉深 hf =TZp=7.23.00=4.2mp 0p v = pa + hspv = 10300+10254.2-174 = 14461kgf/m2計算溫度t = 15C ,Pv = 174kgf/ m2 , PD = 476

6、2.8hp, = 104.63kgfs2/m4序號項目單位數(shù)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=(p 0- p v) / V0.7R20.4012053340.4151747440.421988

7、1816c(柏利爾空泡限界圖)0.160.1620.1633333337T=PDO75/VAkgf38725.3382337901.4802736517.39618AP=T /V0.7R2cm26.7149627736.7169754016.5241950849AE=AP / (1.067-0.229P/D)m210AE/AO=AE /D27.3857718857.4876015217.286833423按上述結(jié)果作圖,可求得不發(fā)生空泡的最小盤面比以及對應的最佳螺旋槳要素AE / AO = 0.549200516 P/D= 0.741852486 D= 4.166m o=0.591857369

8、 Vmax= 15.03775 kn6.強度校核按1983年校核t0.25R及t0.6r,應不小于按下式計算之值: t=, , X=A2GAdN2D3/1010Zb計算功率Ne=54000.98=5292hpAD = AE / AO = 0.549200516, P/D=0.741852486, ，G=7.6gf/cm3 ,N=165rpmb0.66R =0.226DAE / AO/0.1Z=0.226*0.549200516*4.166m/0.4=1.292702683 mb0.25R=0.7212b0.66R = 0.93229717 mb0.6R =0.9911b0.66R = 1.28

9、1197629 m項 目單 位數(shù) 值0.25R0.6R弦長bm634207K1250151K21410635K3434K42297.004326826.6232412A1=D/P(K1-K2D/P0.7)+K3D/P0.7-K419755.287085173.296683Y=A1Ne/ZbN8223K53412K64165K7380330K81185.1838161010.409249A2=D/P(K5+K6)+K7+K81.1791.179材料系數(shù)K（鋁鎳合金）0.261120860.161991195X=A2GAdN2D3/1010Zb146.706353571.32164252mm159

10、.349590.8188MAU標準槳葉厚度tmm滿足要求滿足要求校核結(jié)果146.706353585.04785519實取槳葉厚度mm634207實取槳葉厚度按t1.0R=0.0035D=14.581 與t0.25R=146.7063535 連直線決定:t0.2R = 155.5147104 mm t0.3R = 137.8979966 mmt0.4R = 120.2812828 mm t0.5R = 102.664569 mmt0.6R = 85.04785519 mm t0.7R = 67.43114139 mmt0.8R = 49.8144276 mm t0.9R = 32.1977138

11、 mm7.螺距修正根據(jù)尾軸直徑大小，決定轂徑比dh/D=0.18，此值與MAU槳標準轂徑比相同，故對此項螺距無需修正。由于實際槳葉厚度大于MAU槳標準厚度，故需因厚度差異進行螺距修正。設計槳 0.7R =0.052351381標準槳 0.7R = 0.0552269751s = =0.6562626850.7R =0.7R設0.7R標0.75=-0.002216992t=20(1s) 0.7R =0.002158685修正后的螺距比：=0t =0.7440111718.重量及慣性矩計算根據(jù)MAU槳切面的面積數(shù)據(jù)用積分方法計算得：槳葉重量 3582.9355 kgf槳轂重量 6589.59094

12、 kgf螺旋槳重量 10172.53 kgf槳葉慣性矩 435.6 kg.m.s2槳轂慣性矩 360.85 kg.m.s2螺旋槳總慣性矩 796.45 kg.m.s2（1）（2）（3）（4）（5）（6）（7）（8）（9）（10）r/R面積系數(shù)Ka弦長最大厚度 bt切面面積(m2)S=Kabt辛式系數(shù)SM(4)(5)rr2(6)(7)(6)(8)0.20.6740.1454878570.098058810.0980590.41660.1735560.0408510.0170190.30.6740.1502219460.101249540.4049980.62490.39050.2530830.1

13、581520.40.6740.14631570.098616720.1972340.83320.6942220.1643350.1369240.50.67450.1346355230.090811640.3632471.04151.0847220.3783210.3940220.60.67450.1163568310.078482620.1569651.24981.5620.1961750.245180.70.6770.0917588040.062120740.2484831.45812.1260560.3623130.5282880.80.6830.0620510020.042380820.

14、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.敞水特性曲線由MAU4-40,MAU4-55,P/D=0.7和0.8 的敞水特性曲線內(nèi)插得到MAU4-0.549,P/D=0.744 的敞水特性曲線，其數(shù)據(jù)如下：設計槳的敞水特性數(shù)據(jù)表J00.10.20.30.40.50.60.710KQ0.36110.324680.288260.251840