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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C =0.84 b菱形系数C =0.849 p中剖面系数C =0.69 m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n s=0.97 (中机型船)减速装置的效率n G
2、=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n R=1.004船身效率计算n 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* n G * n s* n R= 0.9*1714*0.97*0.97*l=1451.43hp6 假定设计航速有效马力计算根据MAU4-40, MAU4-55, MAU4-70的Bp- 6图谱列下表计算。序号项目单位数值1假定设计航速VsKn101113142V 二Vs(i)Kn8.048.8449.64810.4523Bp = NP 0.5/V 2.538.07
3、930.005724.1397319.761834Bpo.56.1708185.4777464.913224.4454285MAU4-40672.565.259.754.66P/D0.655240.6922750.7279670.763857n0.5720.6040.6320.6558thp=p n n nDHOrHp1775.2561874.5711961.4722032.8559MAU4-55672.565.259.754.610P/D0.6964960.7329560.771910.81201511n0.5550.5880.6170.64212thp=p n n nDHOrHp1722.
4、4951824.9141914.9181992.50813MAU4-70671.263.958.253.214P/D0.7051320.7461960.7887960.83542615nA0.5350.5640.5880.60916thp=p n n n D_HOrHp1660.4231750.4271824.9141890.089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= 11.83KnMAU4-55Vs= 11.73KnMAU4-70Vs= 11.56Kn7 初步确定桨的要素MAU设计航速Vs(kn)P/D5D(m
5、)n044011.830.72260.63.480.62845511.730.76159.63.390.61047011.560.7759.93.360.5788 空泡校核根据柏利尔商船界限线计算桨轴沉深h =T-Z =3.5ms P计算 t=15 C,则 Pv=174kgf/m2取水温15度，Pa-大气压为：10330Kgf/m2P -P = P -P + hy二 13743.5kgf/m20 v a v s序 号项目单位数值MAU4-40MAU4-55MAU4-701VsKn11.8311.7311.562V = 0.5144 ( 13)VsAm/s4.5761854.5375024.47
6、17413(0.7nND/60)2(m/s)2390.4305371.2937364.2494V 2= V2+ (3)0.7RA(m/s)2411.372391.8826384.24545o = (Po Pv) / 0.5P V 20.7R0.6386110.6703710.6836956t c (查图 6-20 )0.2180.2250.2287T= (Q/D)(K / K )TQkgf14938.7514634.2714070.498A = T / (tc 0.5PV 2) p0.7Rm23.1841743.1725353.0700089A = A / (1. 067-0.22P/D)EP
7、m23.5314493.5537413.44685210A/A = A /nD2 /4EDE0.3716860.393310.3888589 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。A / A =0.40；MAU4-40 桨；E0Vs =11.83Kn ； P / D =0.722 ； D =3.48m ； n =0.6280N=155r/min强度校核根据2001年钢制海船入籍建造规范校核t 及t应不小于按下式计0.25R 0.6R算之值：t =K - X Y=1.36A Ne/(ZbN)1X=AGAN2D3/(1010Zb)2d计算功率:Ne=
8、Psx n =1714x0.97=1662.58 HPSD=3.48 mA=A/A=0.4dEOP/D=0.722 e =10G=7.5 g/cm3N=155 r/minb =0. 226DA/(0. 1Z)=0. 786480.66Rdb =0.7212b=0.5672 b =0.9911b=0.77950.25R0.66R0.6R0.66R项目数值0.25R0.6R弦长b0.5670.78K634207KQ250151Ko1410635K434A =D/P(K -K D/P )+K D/P -K2347.4842.5112U.iR3U.iR4Y=A Ne/ZbN11101.82896.5K
9、82235K3412K41651K380330A =D/P(K + K e )+ K e + K256781374.51178材料系数K （锰铝黄铜）1. 171.17X=A GA N2D3/(101oZb)2d0.1840.115t=Y/(K-X)o.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:t =141.3mm0.2Rt =75.9mm0.6R11 螺距修正t =124.9mm0.3Rt =59.5mm0.7Rt =108.6mm0.4
10、Rt =43.2mm0.8Rt =92.2mm0.5Rt =26.8mm0.9R螺距比为:P/D=(P/D) =0.722012 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：G = 0.169 YZb (0.5t +t ) (1 d/D) Dblmax0.20.6=0.169 7500 4 0.7865 (0.5 0.141+0.076)(10.18) 3.48 =1667kgf桨毂重：G = (0.88 0.6 d / d) L Yd 2n 0 K= (0.88 0.6 0.236/0.6264) 0.470 7500 0.6264 2= 904.5kgf螺旋桨重量：G = G
11、 + G = 1667+904.5=2571.5kgfbl n螺旋桨的惯性矩：I二0.0948 YZb (0.5t +t ) D3mp max 0.2 0.6=0.0948 7500 4 -0.7865(0.5 -0.141+0.076) -3.483=13810.3kgf cmS213 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MAU4-40,0.20.30.40.50.2592460.2214750.187970.1520870.0285030.0259460.0230860.01990514. 系柱特性计算由上图得 J=0 时，KT=0.3
12、02, 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/(2nN)=7682.16kgfm系柱推力T=KTQ/KQD=20321kgf螺旋桨转速N=60SQRT(T/PD4KT)=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A/Ao=0.40E纵倾角 =10。螺旋桨效率n =0.6280设计航速Vs=11.83kn毂径比d/D=0.18b旋向双桨外旋材料锰铝黄铜重量2571.5kgf惯性矩13810.3kgf cmS215.螺旋桨型值表（详见附EXCEL表）螺旋桨桨叶轮廓尺寸表:r/R0.20.30.40.50.60.70.80.9从母线到叶片随边的距 离219.899808263.07756304.83965342.43339377.19581403.70018412.03687381.36415C从母线到叶片导边的距 离303.42
