螺旋桨设计计算书

1、目录1. 船舶主要要素 12. 船体阻力计算 13. 船身效率计算 14. 收到马力计算 15. 假定设计航速有效马力计算 26. 初步确定桨的要素 37. 拖力计算 48. 空泡校核 49. 确定螺旋桨的要素 510. 强度校核611. 确定设计的螺旋桨各切面厚度 712. 螺距修正813. 重量及惯性距计算914. 螺旋桨计算总结915. 螺旋桨型值表9MAU型螺旋桨设计计算书1.船舶主要要素（已知拖网渔船主要参数）设计水线长Lwl 46.7m垂线间长Lpp =46 m;型宽B :=8.8m;平均吃水T :=3.3m;方形洗漱cb=0.678棱形系数Cp :=0.69;排水体积=905.7

2、m排水量=928.3t ;主机功率MHP = 1400HP;转速N=370r/mi n;桨轴线中心距基线高Z p = 1.28m;轴系传递效率ns =0.97右旋材料铝镍青铜2.船身效率计算根据汉克歇尔公式:伴流分数推力减额分数t = 0.77Cp-0.3 = 0.2313船身效率 相对旋转效率n h = 1n r = 1 （渔船）3 = 0.77C p - 0.28 =0.25134. 收到马力计算储备功率10%轴系数效率取 n s = 0.97收到马力PD =MHP n sn r= 1222.2HP （公制）5. 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VsKn1112131

3、42V=Vs(1-3 )Kn8.2599.7510.53Bp = NPd0.5 八/ 2.5 /V A66.16953.23043.57736.2074o 0.5BP8.1347.2966.6016.017591.883.576.870.86MAU4-40P/D0.5880.6120.6360.6637)n 00.4960.5270.5530.5808THP=Pq hn On rHp9s90.382.375.369.310MAU4-55P/D0.630.6550.6820.71011)n 00.4820.5080.5370.56412THP=Pq hn On rHp13s8981.274.66

4、8.414MAU4-70P/D0.6340.6580.6880.71815)n 00.4670.4940.5170.54316THP=Pq hn On rHp根据MAU4-40 MAU4-55 MAU4-70勺Bp- S图谱列下表计算。据表中的计算结果可绘制THP-VS曲线，如下图1所示。从THP-VS曲线EHP曲线交点处可获得:MAU4-40Vs=11.08K nMAU4-55Vs=10.95KnMAU4-70Vs=10.82Kn17EHP907508060070450 .60300 Vs(Kn)6. 初步确定桨的要素MAU设计航速Vs(kn)P/DD(m)n 04

5、-4010.790.6876.81.520.5554-5510.680.69176.41.550.5384-7010.540.69576.21.600.510以上数据均由上图1查得7. 拖力计算拖网航速Vs=4Kn序 号计算项目MAU4-40MAU4-55MAU4-701直径d( m1.521.551.602VA=0.5145 Vs (13 )(m/s)1.651.651.653Q=DHP*75*60/2 n N8468468464假定转速Ni3003403603003403603003403605J=60Va / N 1 D0.2170.1920.1810.220.1940.1830.224

6、0.1980.187625K Q =3600Q/ pN 1 D0.0390.0310.0280.0420.0330.0290.0470.0370.0337J（查图谱）0.1940.1960.2018Kq0.0330.0350.0399Kt0.2480.2520.25410N=60 - Va /JD33533733511T 拖=(Q/D) (K t / K Q)(kgf)4182406037488. 空泡校核根据瓦根宁根限界限线计算桨轴沉深 h s =Tm - Zp=2.4m计算温度 20 C,则 Pv=238kgf/m2取水温20度，Pa-大气压为：10330Kgf/m2P0-Pv= P a

7、- Pv+hs 丫 =12552kgf/m序 号项目单位数值MAU4-40MAU4-55MAU4-701VsKn4442VA = 0.5145 ( 13 )Vsm/s1.661.661.6632(0.7 n ND/60)(m/s) 23483433254V0.7R2 = Va2 + (3)(m/s) 2350.8345.8327.852(T =( Po Pv) / 0.5 P V0.7R0.6840.6940.7326T c(查瓦根宁根界限线)0.2340.2450.2557T= (Q/D) (K t / K q)kgf41834061374882Ap= T / (t c 0.5 p V0.7

8、R )2 m0.970.920.869Ae = A p/ (1.067-0.22P/D)2 m1.0541.0090.94410AEAd = Ae / n D2 /40.5810.5710.5579. 确定螺旋桨的要素据上表计算结果作下图2所示，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。 由图可得：A / A 0 =0.56 ； Vs =10.95Kn； P / D =0.69； D =1.56m ； n。=0.53N=336r/min,有效拖力 Te二T(1-t)=4060*(1-0.173)=3357.62kgf10. 强度校核根据2001年钢制海船入籍建造规范校核t 0.2

9、5R及t 0.6R应不小于按下式计算之值:Y=1.36AiNe/(ZbN) x=A2GANfB(10 10Zb)计算功率：Ne=PsXn s=6000.97=582 HPD=1.56 mAd二A/Ao=0.56P/D=0.69 & =10oG=7.6 g/cm3 N=336 r/mi nb.66R=0.226DAe/Ao/0.1Z=0.479bo.25R =0.722b 0.66R =0.346 b 0.6R =0.9911b 0.66R =0.478项目数值0.25R0.6R舷长b0.3460.478k1634207k2250151k31410635k4434A1 = D/P(k 1-k 2

10、D/P.7R)+ k 3D/P.7R-k 42490.2886.5Y=ANe/ZbN3107.3800.7k58223k63412k74165ks380330A=D/P(k5+k6 )+k7 +ks1419.81193.4材料系数K （锰铁黄铜）11x=AGANfD7(10 10Zb)0.1660.102t=Y/(k-x)0.561.035.0AU标准桨厚度t 60.536.17校核结果不满足要求满足要求实取桨叶厚度613511确定设计的螺旋桨各切面厚度实际桨叶厚度按t 1.0r=0.003D=5.0 mm与t 0.25r=61.2 mm连成直线决定: 图三。从图中可得出各切面最大厚度为：t

11、o.2R=64mm t o.3R=57mm t o.4R=49mm t o.5R=42mmt o.6R=35mm t o.7R=27mm t o.8R=21mm t o.9R=14mmr/R1.0 .0.9 .0.8 ,0.7 .0.6 .0.5 .0.4 ,0.3 .0.2 -iI,Li.102030405060t(mm)12. 螺距修正由于实际桨叶厚度小于标准厚度，故需因厚度差异进行螺距修正。设计桨(t/b) 0.7R=0.027/0.9964b=0.055标准桨 (t/b) .7r=0.0171D/(0.9964 X).31075D)=0.055231- s二Va/Np=(1-w)*V*

12、30.866/Np=0.8089 (t/b)0.7R 设-(t/b)0.7R 标 *0.55/0.544*0.75=0.000556 (t/b) t= -2(P/D) 0*(1-S) * (t/b) 0.7r=-2*0.67*0.8089*0.000556=-0.000603修正后的螺距比为：P/D=(P/D)+ (t/b) t=0.6913. 重量及惯性距计算采用船舶及海洋工程设计研究院公式：桨叶重：Gbi = 0.169 丫 Zbmax (0.5t 0.2+t 0.6) (1 d/D) D=0.169 8410 4 0.64 (0.5 0.064+0.035)(1-0.18) 1.56=3

13、25.8kgf桨毂重：G = (0.88 0.6 do / d) L ky d=(0.880.6 0.14/0.27) 0.375-8410 0.27=130.8kgf螺旋桨重量：G = Gbl+ Gn = 325.8+130.8=456.6kgf螺旋桨的惯性矩：lmp= 0.0948 丫 Zbax (0.5t 0.2+t0.6) D3-1.56=0.0948 8410 4 0.64(0.5 0.064+0.035)2=519.14kgf cm- s14. 螺旋桨计算总结螺旋桨直径D=1.56 m螺距比P/D=0.89叶数Z=4型式MAU型盘面比Ae/Ao=0.56纵倾角& =10螺旋桨效率n

14、 0=0.53设计航速Vs=10.95kn毂径比db/D=0.18旋向右旋材料锰铁黄铜15. 螺旋桨型值表螺旋桨桨叶轮廓尺寸表r/R0.2 C.3 0?L0.50.60.70.80.9 ().95 1.0从母线到叶片随边的距离14016819421824025726324321186从母线到叶片导边的距离194223 24325625724320412769叶片宽度334391 437474497500467370280叶片厚度6457494235272114108从导边至最厚点的距离107126 140154173201212181141MAU型螺旋桨切面尺寸表r/R0.2叶宽b334334

15、334334.334334334最大厚度t64646464646464X071320 1335067Y22333842 1495559Yu221612106320.3叶宽b3913910.391391391391391最大厚度t57575757575757X08P 1623 395978Yo20293438434852Yu20141196310.4叶宽b437437437437 437437437最大厚度t50505050505050X091726 :446687Yo17263033 1384246Yu1712975310.5叶宽b474474|474474 474474474最大厚度t424

16、204242424242X01001929 1487296Yo152202528 1323639Yu1510864210.6叶宽b4974971497497 I497497497最大厚度t35353535353535X011 2233 15481109Yo12172023 1263032Yu128653210.7叶宽b5005001500500 I500500500最大厚度t28282828282828X0132538 I6394127Yo8121416 I202325Yu86432100.800叶宽b4674671467467 I467467467最大厚度t20202020202020X01

17、32740 I6699132Yo47810 I131618Yu43221100.900叶宽b3703701370370 I370370370最大厚度t13131313131313X0112345785113 .Yo134571011Yu11000000.950叶宽b280280280280280280280最大厚度t9999999X091726446587Yo1234578Yu0000000续表:33433433433433433433433433433406464P64 J646464646464P64100107134167201234267301318J33464646358504129

18、1610300P0 |000000: 0391391391 J391391391391391391|39157575757575757575757117125:156 J19523427331251371390575756 J51443626149J3000 0000000437437437 J4374374374374374371437505050 J505050505050|50131140175 219262306350394416437495048 J453931221371 2000 J0000001 0474474474 47447447447447447447442424242424242424242144154192 J2392863333804274501 474424241