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20081013202011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 型寬 設計吃水 排水量 方型系數(shù)槳軸中心距基線高度L = 118.00B = 9.70T = 7.20CZp = 3.00米米米 = 5558.2 噸B = 0.658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)21602420300540452. 主機參數(shù)型號額定功率 額定轉(zhuǎn)速 轉(zhuǎn)向傳遞效率6ESDZ58/100 Ps = 5400 hp N = 165 rpm右旋s=0.98柴油機3. 相關推進因子

2、w = 0.279t = 0.223R = 1.01 -t=丄丄=1.07771 - w伴流分數(shù) 推力減額分數(shù) 相對旋轉(zhuǎn)效率 船身效率4.可以達到最大航速的計算采用MAL四葉槳圖譜進行計算。取功率儲備10%軸系效率n 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勺 JBp- S 圖譜列表計算:項目單位數(shù)值假定航速Vkn13141516V=(1-w)Vkn9.37310.09410.81511.536Bp=NB0.5/Va2.569.01304269.0130469.0130422569.01304225JBP268.96

3、548323.7116384.6505072451.9996707MAU4-4075.672.1087864.8797736960.744P/D0.640.6673210.6854205610.720498n O0.55833330.5827810.6057068060.62606Pte =Pd n H n ohp2863.99072989.3953106.9946263211.4377MAU4-55S74.62912168.6357663.5658914759.341025P/D0.68600640.7130990.7409584660.7702236n o0.54142170.567138

4、0.5909414380.6111996Pte =Pd n H n ohp2777.24192909.1563031.2551443135.1705MAU4-70S73.77256367.7718563.0305555658.68503P/D0.692540.7231620.7542806390.7861101n o0.52107250.545710.5657927790.5828644Pte=FD - n H n ohp2672.86012799.2382902.25422989.8239據(jù)上表的計算結(jié)果可繪制PTE、S、P/D及n。對V的曲線，如下圖所示。4000Q.S35CQPt3000

5、25C02000(U J3sanO0. 6 St4jtM-121314jU1516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n O如下表所列。MAUVmaxP/DDn O4-4015.1370.6891964.10064.2398766910.6086224-5515.0370.7420163.39984.1658191120.591738724-7014.8510.74960663.686884.1329199360.5630774265.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 h

6、f =T Zp=7.2 3.00=4.2mP 0 Pv = pa + 丫 hs pv = 10300+1025 X 4.2-174 =14461kgf/m2計算溫度 t = 15 C ,Pv = 174kgf/ m 2 , P d = 4762.8hp,p = 104.63kgfs 2/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(0.7 n ND/60)2(m/s)2688.97806

7、9665.795982655.04601464V0.7R=Va+32(m/s)20.4012053340.4151747440.42198818151 2 z =(p 0- p v) / 2 p V0.7R0.4012053340.4151747440.4219881816T c（柏利爾空泡限界 圖）0.160.1620.1633333337T=PD n o 75/Vakgf38725.3382337901.4802736517.396181 2Ap=t / p V0.7R n c2m26.7149627736.7169754016.5241950849Ae=A p / (1.067-0.22

8、9P/D)m21012Ae/Ao=Ae /- n D47.3857718857.4876015217.286833423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15.03775 knAe / Ao = 0.549200516 P/D= 0.741852486 D= 4.166m n 0=0.591857369 Vmax=V(kn)15. 20.5S0.0.0.52n6058566.強度校核按1983年VV規(guī)范 校核t 0.25R及t 0.6r ,應不小于按下式計算之值：7 A1NeY =ZbNX=A2GAdN2D3/1010Zb計算功率 Ne=5400X 0.98=

9、5292hpAd = Ae / Ao = 0.549200516, P/D=0.741852486,=8。，G=7.6gf/cm3 ,N=165rpmbo.66R =0.226D AE / AO心1Z=0.226*0.549200516*4.166m/0.4= 1.292702683 mbo.25R =0.7212 bo.66R = 0.93229717 mb0.6R =0.9911b0.66R = 1.281197629 m項 目單位數(shù)值0.25R0.6R弦長bm634207K250151K.1410635&434K42297.004326826.6232412A = D/P(K1-K2D/

10、P0.7)+ K3D/P0.7-K419755.287085173.296683Y=ANZbN8223K53412K64165K380330K1185.1838161010.409249A=D/P(K5+K6 ) + K7 +K81.1791.179材料系數(shù)K （鋁鎳合金）0.261120860.161991195X=AGANV/1010Zb146.706353571.32164252t =、/y/(K -X)mm159.349590.8188MAI標準槳葉厚度t mm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t i.or=O

11、.OO35D=14.581與 t o.25R=146.7O63535連直線決定：155.5147104 mmtO.3R = 137.8979966mm120.2812828 mmtO.5R = 102.664569mm85.04785519 mmtO.7R = 67.43114139mm49.8144276 mmtO.9R = 32.1977138mmt O.2R =t O.4R =t O.6R =t O.8R =7.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MAL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MAK標準厚度，故需因厚度差異進行螺距修正。設計槳

12、標準槳()O.7R =0.052351381b()O.7R = 0.055226975bVa(1-)3O.866=0.656262685NPNPttt0 55 ()0 7R = (一) 0 7r 設(一)0 7R 標XX O.75= -0.002216992bbbO.51PPt(匚)t= 2(匚)o(1 - s) (-)o7r =O.OO2158685DDb修正后的螺距比：P = (P)0 +(上)t =0.744011171D DD8.重量及慣性矩計算根據(jù)MAK切面的面積數(shù)據(jù)用積分方法計算得: 槳葉重量 槳轂重量螺旋槳重量槳葉慣性矩 槳轂慣性矩螺旋槳總慣性矩10172.53 kgf435.6

13、 kg.m.s2360.85 kg.m.s2796.45 kg.m.s23582.9355 kgf6589.59094 kgf（1）（2）（3）(4)(5)(6)(7)(8)(9)(10)r/R面積系數(shù)Ka弦長X最大 厚度bx t切面面積(m2)S=Kabt辛式 系數(shù)SMX 5)r2 rX X (8)0.20.6740.1454878570.098058810.0980590.41660.1735560.0408510.0170190.30.6740.1502219460.101249540.4049980.62490.39050.2530830.1581520.40.6740.1463157

14、0.098616720.1972340.83320.6942220.1643350.1369240.50.67450.1346355230.090811640.3632471.04151.0847220.3783210.3940220.60.67450.1163568310.078482620.1569651.24981.5620.1961750.245180.70.6770.0917588040.062120740.2484831.45812.1260560.3623130.5282880.80.6830.0620510020.042380820.0847621.66642.7768890.1412470.2353740.90.6950.0305284290.021217240.0848691.87473.51450.1591040.29827210.700102.0834.3388890.0131030.027293刀(6)=刀(9)=刀(10)=1.6386161.695432.01329.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J00.10.20.30.40.50.60.710KQ0.3611