螺旋桨课程设计

螺旋桨图谱课程设计天津大学仁爱学院姓名：陈旭东学号：6010207038专业：船舶与海洋工程班级：2班日期：2013.6.30螺旋桨图谱课程设计一．已知船体的主要参数船型：双机双桨多用途船总长:L=150.00m设计水线长:WLL=144.00m垂线间长:PPL=141.00m型深:H=11.00m设计吃水:T=5.50m型宽:B=22.00m方形系数:BC=0.84菱形系数:PC=0.849横剖面系数:MC=0.69排水量:=14000.00t尾轴距基线距离:PZ=2.00m二．主机参数额定功率:MCR=1714h额定转速:n=775r/min齿轮箱减速比:i=5旋向:右旋齿轮箱效率:G=0.97三．推进因子的确定伴流分数=0.248;推力减额分数;t=0.196相对旋转效率R=1.00;船身效率;H=11t=1.0691四．可以达到最大航速的计算采用MAU四叶桨图谱进行计算。取功率储备为10%，轴系效率S=0.97，螺旋桨转速N=n/i=155r/min螺旋桨敞水收到马力：DP=1714*0.9*S*R*G=1714*0.9*0.97*1.00*0.97=1451.43(hp)根据MAU4-40、MAU4-55、MAU4-70的PB图谱列表计算如下：项目单位数值假定航速Vkn111213AV=(1-)Vkn8.279.029.780.52.5/PDABNPV30.02424.16619.742PB5.4794.9164.443MAU4-4065.459.73254.377P/D0.6920.7280.76400.6130.6320.66TEP=2DP×H×0hp1902.41961.382048.28MAU4-556458.253.535P/D0.7380.7780.8000.5880.6140.642TEP=2DP×H×0hp1824.831905.611992.41MAU4-7063.357.452.8P/D0.7510.7960.84200.5650.5820.607TEP=2DP×H×0hp1753.451806.211883.79根据上表中的计算结果可以绘制TEP、、P/D及0对V的曲线，如图1所示。从TEP-f(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0如下表所列。MAUmaxVP/DD04-4011.790.72159.83.4280.6264-5511.680.76859.13.3960.6014-7011.470.77559.63.3550.558五．空泡校核按柏利尔空泡界限线中商船上界限，计算不发生空泡之最小展开面积比。桨轴沉深sPhTZ=5.50-2.00=3.50m0vasvppphp=10330+1025×3.50-174=13743.52/kgfm计算温度t=15℃,vp=1742/kgfm,DP=1451.43hp,=104.6324/kgfsm序号项目单位MAU4-40MAU4-55MAU4-701maxVkn11.7911.6811.472max0.5144(1)AVVm/s4.5614.5184.43732(0.7/60)ND2(/)ms378.877371.836362.91242220.7(3)RAVV2(/)ms399.677392.250382.5985200.71()/2vRppV0.5350.5450.5596c(查图6-20)0.2110.2150.2187075/DATPVkgf14941.68814480.05413690.186820.71/2PRcATV2m3.3873.2823.1379/(1.0670.229/)EPAAPD2m3.7553.6833.5271020//4EEAAAD0.4070.4130.399根据上述计算结果作图2，可求得不发生空泡的最小盘面比以及所对应的最佳螺旋桨要素。0/EAA0.406，/PD0.778，D=3.412m，00.624，maxV11.525kn六．强度校核按1983年《规范》校核0.25Rt及0.7Rt，应不小于按下式计算之值：YtKX，1eANYZbN，2321010dAGANDXZb计算功率eN1714×S×G=1714×0.97×0.97=1612.703hp0/dEAAA0.406，/PD0.778，10，G=7.63/gfcm,N=155r/min0.6600.226//0.1REbDAAZ0.226×3.412×0.406/0.4=0.7827m0.250.660.7212RRbb0.5645m0.60.660.9911Rbb0.7758mP=2.655m项目单位数值0.25R0.6R弦长bm0.56450.77581K6342072K2501513K14106354K4341120.7340.7D(/)PDAKKDPKKP2209.91798.691/eYANZbN10182.922677.885K82236K34127K41658K38033025678()DAKKKKP1332.321163.77材料系数K（铝镍青铜）1.1791.17923102/10dXAGANDZb0.1740.111()YtKXmm100.64650.061MAU标准桨叶厚度tmm131.1274.73校核结果满足要求满足要求实取桨叶厚度mm132.0076.00实际桨叶厚度按1.00.0035RtD12.00mm与0.25Rt132.00mm连直线决定：0.2Rt140.00mm，0.3Rt124.00mm0.4Rt108.00mm，0.5Rt92.00mm0.6Rt76.00mm，0.7Rt60.00mm0.8Rt44.00mm，0.9Rt28.00mm七．螺距修正根据尾轴直径大小，决定毂径比/hdD0.181，此值与MAU桨标准毂径比相同，对此项螺距无须修正。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07693.00.78279964.006000.0'7.0Rbt标准桨07481.0)41.0/(40.0226.09964.00171.0t7.0DDbR（取MAU4-40为基准桨）6501.0655.2155866.30525.11)248.01()428.3723.0(155866.30)1(VNPVA0024.075.0406.040.07.0'7.07.0RRRbtbtbt00.7()2()(1)()tRPPtsDDb-2×0.778×0.6501×0.0024=-0.00243修正后的螺距比：0()()tPPPDDD0.723-0.00243=0.7206八．重量及惯性矩计算根据MAU桨切面的面积数据用经验公式计算得：桨叶重量bG1904.503kgf桨毂重量hG1746.871kgf螺旋桨总重G3651.374kgf螺旋桨总惯性矩I15296.8792kgfcms九．敞水特性曲线之确定由MAU4-40，MAU4-55，P/D=0.778的敞水性征曲线内插得到MAU4-40.7，P/D=0.778的敞水性征曲线（见下图）。其数据如下表：J00.10.20.30.40.50.60.7TK0.3030.2820.2550.2250.1910.1500.1100.0600QK0.03290.03150.02890.02610.02290.01930.01550.0112十．系柱特性计算由图3得J=0时，TK=0.303，QK=0.0329。计算功率DP=1451.43×0.97×0.97=1365.6505hp系柱推力减额分数0t0.196主机转矩5172.6706155275601451.4327560QNPDmkgf系柱推力kgfDQKKTQT3414.18102412.35172.67060329.0303.0螺旋桨转速min/155.123303.0412.363.1043414.18102606044rKDTNT十一．航行特性计算取转速为155r/min,145r/min,135r/min进行计算,结果如下表：项目单位数值Vkn1112130.5144(1)AVVm/s4.2554.6425.029N=155r/min/AJVnD0.4800.5240.568TK0.1570.1400.123QK0.02030.01870.01706.145/)1(2P42VtDnKTTEhp1839.0661789.0161702.760RSQSDnnKP75/2252hp2992.6392756.7662506.151N=145r/min/AJVnD0.5140.5600.607TK0.1440.1260.107QK0.01910.01730.01556.145/)1(2P42VtDnKTTEhp1476.1581409.0601296.298RSQSDnnKP75/2252hp2305.1572087.9171870.677N=135r/min/AJVND0.5520.6020.652TK0.1290.1090.0875QK0.01760.01570.01386.145/)1(2P42VtDnKTTEhp1146.2821056.615918.884RSQSDnnKP75/2252hp1714.2621529.1991344.137模型试验提供的有效功率将上述计算结果绘成下图：航速（Kn）111213有效功率（满载）hp152520592893满载航行，N=155r/min时，可达最大航速约为V=11.59Kn，主机马力为1605hp,与设计要求基本一致。十二．螺旋桨计算汇总：螺旋桨直径D=3.412m螺距比/PD0.778型式MAU叶数Z=4盘面比0/EAA0.406纵倾角10螺旋桨效率00.624设计航速maxV11.525kn毂径比/0.18hdD旋向右旋材料铝镍青铜重量3651.374kgf惯性矩15296.8792kgfcms