大連理工大學螺旋槳課程設(shè)計匯總

12- 2.船舶阻力估算及有效馬力預報 -1- 3.螺旋槳圖譜初步設(shè)計問題 -1- 功率及轉(zhuǎn)速 -1- 4.螺旋槳圖譜終結(jié)設(shè)計問題 -1- 可達到最大航速的計算 -1- 槳榖重量G(kgf)及I(kgf·cm·s2) -1-hh 總圖的繪制 -1- 任務書1.1課程設(shè)計的性質(zhì)、任務和基本要求生能夠根據(jù)船型主要要素確定有效功率曲線，選定主機功率及轉(zhuǎn)速，根據(jù)螺旋槳設(shè)計圖譜來設(shè)計螺旋槳，完成螺旋槳設(shè)計計算說明書，繪制螺旋槳總圖。通過課程設(shè)計能夠加深學生對螺旋槳圖譜和結(jié)構(gòu)的理解，培養(yǎng)理論聯(lián)系實際的能力，為將來走上工作崗位打下一定的基礎(chǔ)。P的方法。設(shè)計航速14.14kn排水量16009t2.船舶阻力估算及有效馬力預報船型：單槳、球首、球尾、流線型掛舵、中機型多用途遠洋船。設(shè)計水線長Lwl垂線間長Lpp母型船M12-MMMM根據(jù)排水量之比，可得縮尺比：α=2|1/3=0.92，根據(jù)縮尺比可得設(shè)計船1計船tmmmmmmm數(shù)法(1/6211V=V|2111由海軍部系數(shù)相同(C=Ps)，參照母型船數(shù)據(jù)可得到設(shè)計船在各載況下的有效下的有效功率如下表：表2.2.3模型試驗提供的有效功率數(shù)據(jù)母型船航速12-2.3阻力估算由滿載有效功率，根據(jù)公式P=Rvhp可估算船舶阻力E753.螺旋槳圖譜初步設(shè)計問題3.1螺旋槳設(shè)計圖譜，初步確定主機功率及轉(zhuǎn)速3.2選定主機額定功率及轉(zhuǎn)速3.2.1最佳轉(zhuǎn)速確定12-取相對旋轉(zhuǎn)效率………………ηR=1.0船身效率ηH=(1-t)/(1-ω)……………ηH=1.1895軸系效率n=0.97s旋轉(zhuǎn)效率n=1.0RD=4.78*0.92=4.40m。取不同轉(zhuǎn)速，根據(jù)MAU4-55的BP6圖譜列表計算。計初初步設(shè)計確定最佳轉(zhuǎn)速單位數(shù)據(jù)m4.40kn9.59hp3039303930393039r/min14014515015564.2466.5368.8271.120.73440.71780.70590.69920.58580.57480.56500.55395.52545.76735.97326.20913857426845895018hp3977440047315173hp2688291930843306PE(初步估計)N直徑系數(shù)δ=ND/VA等值線與最佳效率曲線P/DPD=BP2VA5/N2螺旋槳能克服的有效馬力2345678912-3.2.2主機功率確定BWSMEB4.螺旋槳圖譜終結(jié)設(shè)計問題kt取相對旋轉(zhuǎn)效率………………ηR=1.0船身效率ηH=(1-t)/(1-ω)……………ηH=1.189512-4.2可達到最大航速的計算取功率儲備取功率儲備10%，軸系效率………=0.97旋轉(zhuǎn)效率n=1.0R=5034×0.9×ηS×ηR=5034×0.9×0.97×1.0=4395hp值8.814.063.77240.641560.56304.76380.69223MAU4-550.54638.89950.7105MAU4-700.52538δP/DδP/D9.49245.751.76468.93780.665980.588767.17850.713030.5723466.18320.739090.5500848.76649.87980.725840.630638.56490.763720.613547.44690.795780.5877570.503.20563.58720.693310.6137862.40850.74610.5950761.87320.760560.56953BP=NPD0.5/VA2.5BP0.5δP/DMAU4-400UVmax/knδ4-700.737666.510.55494．4254.3空泡校核按柏利爾空泡界限線中的商船上限線，計算不發(fā)生空泡的最小展開面積0VaSVVD4.3.1空泡校核計算結(jié)果空泡空泡校核計算結(jié)果MAU4-40MAU4-55MAU4-70Vmaxmm5.860.54425.860.5442526.5720.4274.923.52919.154.816.431m/sV0.7R2=VA2+(0.7πND/60)2.221.890.408m22m22AE=AP/(1.067-0.229P/D)AE/Ao=AE/(πD2/4)E0η012-4.4強度校核0.25R0.6RAANAGAN2D3Y=1e,X=2d,t=KXN=5034×0.97=4882.98(hp)=3589KW。edEOeb=0.226DA/(0.1Z)=0.226×4.503×0.4294/0.4=1.0925(m)0.66Rdb=0.7212b=0.7879mb=0.9911b=1.0828m。0.25R0.66R0.6R0.66RmA1=D/P(K1-K2D/P0.7)+K3D/P0.7-K4Y=1.36A1Ne/(Zbne)K6查書表7-2K7K8X=A2GAdne2D3/(1010Zb)4R0.25Rt(r/R)+194.74712-mmmm0.2t0.3t0.4t0.50.6t0.7t0.8t0.94.5螺距修正由(PD/N)1/3=(4395/142)1/3=3.140，根據(jù)《船舶原理(下)》中圖8-40查得thtd=808mm,則轂徑比d/D=808÷4503=0.18，故無需對此進行修正。hht=0.069456=0.06380.7R (b)0.9964根1.09250.7R0.7R b0.9964根0.31075根D0.7RsA6481sA6481P (b)0.7RL(b)0.7設(shè)(b)0.7標0.545」12-t00.7R (D)(D)(bt00.7R0tD(D)(D0t4.6重量及慣性矩計算已知：材料重量密度γ=7800kgf/m3；槳葉最大寬度b=1.0925m。maxrR.674.674.674.67.67.677.683.695b/m.71.85.9687.39.4b*t/m^2.11.12.11.10.09.07.05.03S/m^2.07.08.08.07.06.05.03.0214242424.07.32.16.29.12.20.07.09r0.2R0.3R0.4R0.5R0.6R0.7R0.8R0.9Rr2.04R2.09R2.16R2.25R2.36R2.49R2.64R2.81R28)*9).01.09.06.14.07.14.06.088)*1.00.02.02.07.04.10.04.0712-01001)每片槳葉重量b(310)3104)每片槳葉質(zhì)量慣性矩=y×每片葉體積慣性矩g=×0.290=23091.779kgf.cm.s29.8b(由螺旋槳圖繪制完成后進行)|+|(|+|3t20hbb4.6.4螺旋槳總慣性矩4.7敞水性征曲線的確定UMAUMAU4-42.9，P/D=0.7064J4.8系柱特性計算TQ計算功率P=5034×0.97=4882.98(hp)D系柱推力減額分數(shù)t=0.1930NQ=D=NKQT=T=51557.2kgfKDQT51557.2螺旋槳轉(zhuǎn)速N=60=60=120r/minpD4K104.634.50340.296T4.9航行特性計算最大航速V=14