螺旋桨设计计算书(2015)

1、MAU型螺旋桨设计计算书1 船体的主要参数船体总长 LOA=150m设计水线长 LWL=144m垂线间长 LPP=141m型宽 B=22m型深 D=11m设计吃水 T=5.5m方形系数 Cb=0.84菱形系数 Cp=0.849中剖面系数 Cm=0.69排水量 =14000t桨轴中心距基线距离 ZP=2m 船体有效马力曲线数据如下：航速（kn）10111213有效马力PE（hp）11411525205928932 主机参数 型号 N/A（两台） 额定功率 PS =1714hp 转速 N=775r/min 齿轮箱的减速比 i=5 桨轴处转速 n=155 r/min 轴系传送效率 S=0.97（中机

2、型船） 减速装置的效率 G=0.97 旋向 双桨外旋3 推进因子的决定伴流分数 =0.248推力减额分数 t =0.196相对旋转效率 R=1.00 4 船身效率计算H=(1-t)/(1-)=1.0695 收到马力计算 储备功率取 10%收到马力 PD =0.9* PS*G *S*R= 0.9*1714*0.97*0.97*1=1451.43hp6 假定设计航速有效马力计算序号项目单位数 值1假定设计航速Vs Kn101113142VA=Vs(1-)Kn8.048.8449.64810.4523Bp = NPD0.5/VA2.5 38.07930.005724.1397319.761834Bp

3、0.56.1708185.4777464.913224.4454285MAU4-4072.565.259.754.66P/D0.655240.6922750.7279670.76385700.5720.6040.6320.6558THP=PDHOrHp1775.2561874.5711961.4722032.8559MAU4-5572.565.259.754.610P/D0.6964960.7329560.771910.8120151100.5550.5880.6170.64212THP=PDHOrHp1722.4951824.9141914.9181992.50813MAU4-7071.26

4、3.958.253.214P/D0.7051320.7461960.7887960.8354261500.5350.5640.5880.60916THP=PDHOrHp1660.4231750.4271824.9141890.089根据MAU4-40，MAU4-55，MAU4-70的Bp-图谱列下表计算。据表中的计算结果可绘制PTE-Vs曲线，如下图1所示。从PTE-Vs曲线PE曲线交点处可获得： MAU4-40 Vs= 11.83Kn MAU4-55 Vs= 11.73Kn MAU4-70 Vs= 11.56Kn7 初步确定桨的要素MAU设计航速Vs(kn)P/DD(m)04-4011.83

5、0.72260.63.480.6284-5511.730.76159.63.390.6104-7011.560.7759.93.360.5788 空泡校核根据柏利尔商船界限线计算桨轴沉深 h s =TZ P=3.5m计算t=15°C,则Pv=174kgf/m2取水温15度，Pa-大气压为：10330Kgf/m2P0-Pv= P aP v+ hs= 13743.5kgf/m2序号项目单位数 值 MAU4-40MAU4-55MAU4-70 1VsKn11.8311.7311.562VA = 0.5144 ( 1)Vsm/s4.5761854.5375024.4717413(0.7ND/6

6、0)2(m/s)2390.4305371.2937364.2494V0.7R2 = VA2 + (3)(m/s)2411.372391.8826384.24545 = （PoPv） / 0.5V0.7R20.6386110.6703710.6836956c ( 查图6-20 )0.2180.2250.2287T =（Q/D）·(K T / K Q)kgf14938.7514634.2714070.498A p= T /（c· 0.5V0.7R2）m23.1841743.1725353.0700089AE = A p/ (1.067-0.22P/D)m23.5314493.5

7、537413.44685210AE/AD = AE /D2 /40.3716860.393310.3888589 确定螺旋桨的要素据上表计算结果，可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。AE / A0 =0.40； MAU4-40桨；Vs =11.83Kn ； P / D =0.722 ； D =3.48m ；0 =0.628N=155r/min强度校核根据2001年钢制海船入籍建造规范校核t0.25R及t0.6R应不小于按下式计算之值： Y=1.36A1Ne/(ZbN) X=A2GAdN2D3/(1010Zb)计算功率: Ne=Ps×S=1714×0.97=

8、1662.58 HPD=3.48 m Ad=AE/AO=0.4 P/D=0.722 =10o G=7.5 g/cm3 N=155 r/minb0.66R=0.226DAd/(0.1Z)=0.78648b0.25R=0.7212b0.66R=0.5672 b0.6R=0.9911b0.66R=0.7795项 目数 值0.25R0.6R弦长 b0.5670.78K1634207K2250151K31410635K4434A1=D/P(K1-K2D/P0.7R)+K3D/P0.7R-K42347.4842.5Y=A1Ne/ZbN11101.82896.5K58223K63412K74165K8380

9、330A2=D/P(K5+ K6)+ K7+ K81374.51178材料系数K（锰铝黄铜）1171.17X=A2GAdN2D3/(1010Zb)0.1840.115t=Y/(K-X)0.5106.152.4MAU标准桨厚度t133.175.9校核结果满足要求满足要求实取桨叶厚度133.175.910 确定设计的螺旋桨各切面厚度桨叶厚度查表8-4 MAU标准桨可得出各切面最大厚度为：t0.2R=141.3mm t0.3R=124.9mm t0.4R=108.6mm t0.5R=92.2mmt0.6R=75.9mm t0.7R=59.5mm t0.8R=43.2mm t0.9R=26.8mm11

10、 螺距修正螺距比为：P/D=(P/D)0 =0.72212 重量及惯性矩计算 采用船舶及海洋工程设计研究院公式： 桨叶重：Gbl = 0.169·Zbmax (0.5t0.2+t0.6) (1d/D) D =0.169·7500·4·0.7865·(0.5·0.141+0.076)·(1-0.18)·3.48 =1667kgf 桨毂重：Gn = (0.880.6·d0 / d) LKd 2 =(0.880.6·0.236/0.6264) 0.470·7500·0.6264 2

11、 = 904.5kgf螺旋桨重量：G = Gbl+ Gn = 1667+904.5=2571.5kgf 螺旋桨的惯性矩：Imp = 0.0948·Zbmax (0.5t0.2+t0.6) D3 =0.0948·7500·4·0.7865(0.5·0.141+0.076) ·3.483 =13810.3kgf·cm·s2 13 敞水性征曲线之确定由MAU4-40，P/D=0.7和P/D=0.8的敞水性征曲线内插得到MAU4-40，P/D=0.722的敞水性征曲线，其数据见下表。J00.10.20.30.40.50.6

12、0.70.8KT0.301880.2775650.2592460.2214750.187970.1520870.1120990.0686680.020629KQ0.0328070.0307810.0285030.0259460.0230860.0199050.0163150.011980.00659514. 系柱特性计算由上图得J=0时，KT=0.302，KQ=0.0328.计算功率PD=1714*0.97=1662.58hp系柱推力减额分数取t0=0.04主机转矩 Q=PD*60*75/(2N)=7682.16kgf·m系柱推力 T=KTQ/KQD=20321kgf 螺旋桨转速 N

13、=60SQRT(T/D4KT)=125.64r/min15. 螺旋桨计算总结螺旋桨直径 D=3.48 m 螺距比 P/D=0.722 叶数 Z=4 型式 MAU型盘面比 AE/Ao=0.40纵倾角 =10o螺旋桨效率 0=0.628设计航速 Vs=11.83kn毂径比 db/D=0.18旋向 双桨外旋 材料 锰铝黄铜重量 2571.5kgf 惯性矩 13810.3kgf·cm·s215. 螺旋桨型值表（详见附EXCEL表）螺旋桨桨叶轮廓尺寸表:r/R0.20.30.40.50.60.70.80.90.951从母线到叶片随边的距离219.899808263.07756304.

14、83965342.43339377.19581403.70018412.03687381.36415330.87214135.98239从母线到叶片导边的距离303.423984348.0174380.02714399.53184402.28452379.94849318.76034197.64242106.56804叶片宽度523.323792611.09496684.86678741.96523779.48033783.64867730.79722579.00658437.44018叶片厚度141.288124.932108.57692.2275.86459.50843.15226.796

15、18.79210.44从导边至最厚点的距离167.463613195.55039219.15737241.1387272.03863315.02677332.51273283.13422218.72009MAU型螺旋桨切面尺寸表:r/R0.2叶宽b523523523523523523523523523523523523523523523523523最大厚度t141141141141141141141141141141141141141141141141141X010.4620.9231.3852.378.45104.6156.9167.36209.2261.5313.8366.1418.447

16、0.7496.85523Yo49.3573.108584.247593.2715107.2305120.2025130.002140.718141137.8275126.8295110.191589.041563.802535.67321.156.345Yu034.192526.860521.1514.17.6143.313500000000000.3叶宽b611611611611611611611611611611611611611611611611611最大厚度t125125125125125125125125125125125125125125125125125X012.2224.443

17、6.6661.191.65122.2183.3195.52244.4305.5366.6427.7488.8549.9580.45611Yo43.7564.812574.687582.687595.0625106.5625115.25124.75125122.1875112.437597.687578.937556.562531.62518.755.625Yu030.312523.812518.7512.56.752.937500000000000.4叶宽b685685685685685685685685685685685685685685685685685最大厚度t1091091091091

18、09109109109109109109109109109109109109X013.727.441.168.5102.75137205.5219.2274342.5411479.5548616.5650.75685Yo38.1556.516565.127572.103582.894592.9225100.498108.782109106.547598.045585.183568.833549.322527.57716.354.905Yu026.432520.764516.3510.95.8862.561500000000000.5叶宽b7427427427427427427427427427

19、42742742742742742742742最大厚度t9292929292929292929292929292929292X015.062630.125245.187875.3872113.0066150.7002226.0874241.15300.0648373.7454447.3518521.0324594.713668.3194705.1968742Yo32.247.70254.9760.85869.96678.4384.82491.8169289.9382.75471.89858.09841.6323.27613.84.14Yu022.3117.52613.89.24.9682.16

20、200000000000.6叶宽b779779779779779779779779779779779779779779779779779最大厚度t7676767676767676767676767676767676X016.175632.351248.526880.9522121.3912161.8302242.7824258.958315.7952386.8046458.2592528.8976599.907670.9906706.4582742Yo26.639.40645.4150.27457.79864.7970.07275.8487674.2968.36259.39447.99434.

21、3919.22811.43.42Yu034.192526.860521.29114.17.6143.313500000000000.7叶宽b784784784784784784784784784784784784784784784784784最大厚度t6060606060606060606060606060606060X019.678439.435259.113698.4704147.7056196.9408295.4896315.168370.2832439.2752508.1888577.1808646.0944715.0864749.504784Yo2131.1135.8539.6945

22、.6351.1555.3259.886058.6553.9746.8937.8927.1515.1892.7Yu014.5511.43963.241.4100000000000.8叶宽b731731731731731731731731731731731731731731731731731最大厚度t4343434343434343434343434343434343X020.760441.520862.2081103.7289155.5568155.5568311.1136331.874378.8042437.5035496.2028554.9021613.6014672.3007701.6869731Yo15.0522.295525.692528.444532.701536.657539.64642.9144342.032538.678533.604527.154519.457510.8796.451.935Yu010.