螺旋槳課程設(shè)計(jì)

1、JS813尾滑道漁船螺旋槳設(shè)計(jì)書(shū)指導(dǎo)老師：學(xué)生姓名：學(xué)號(hào):完成日期:第10頁(yè)共16頁(yè)1.船型單槳流線型舵，前傾首柱，巡洋艦尾，柴油機(jī)驅(qū)動(dòng)，尾機(jī)型尾滑道漁船設(shè)計(jì)水線長(zhǎng)：LwL=29.80m垂線間長(zhǎng)：LBP=28.00m型寬：B=6.30m型深：D=2.90m設(shè)計(jì)吃水：Td=2.20m方型系數(shù)：Cb=0.555排水量：A =222t棱型系數(shù)：Cp=0.653縱向浮心坐標(biāo)Xb= -1.36m縱向浮心位置Xc=%L/ A 1/34.92A。6431.74寬度吃水比B/T2.86艾亞法有效功率估算表:速度V/Kn91011Froude 數(shù)0.270.300.33標(biāo)準(zhǔn)Co （圖7-3）332.58270.

2、58223.22標(biāo)準(zhǔn)Cbc0.6250.5770.555實(shí)際Cb （肥瘦%）（本船Cb=0.555）12.0% （瘦）3.8% （瘦）0Cb修正%8.70%1.88%0Cb修正數(shù)量A 128.935.090已修正Cb之C1361.51223.22275.67B/T修正%-4.773-4.773-4.773B/T修正量A 217.2510.6513.16已修正B/T之C2378.76233.87288.83標(biāo)準(zhǔn)Xc （ L % ）船中后1.30% （后）2.39% （后）2.04% （后）實(shí)際Xc （L % ）船中后（本船為后）4.56%4.56%4.56%相差L ,在標(biāo)準(zhǔn)后（本船均為在標(biāo)準(zhǔn)后）

3、3.26%2.52%2.17%Xc修正（% ）4.4%3.2%5.4%Xc修正數(shù)量A 3-12.71-9.24-15.60已修正Xc之C3366.05279.60218.27長(zhǎng)度彳正 = (Lwl-1.025Lpp )/Lwl*100%3.7%3.7%3.7%長(zhǎng)度修正A 413.5410.348.08已修正長(zhǎng)度之C4379.59289.44226.35VA372910001331PE=( A A0.64)*(VA3)*0.735/C4(KW)44.8180.47137.20PE=( A A0.64)*(VA3)*0.735/C4(hp)60.97109.48186.672.主機(jī)參數(shù)型號(hào)：8E1

4、50C標(biāo)定功率：PS2= 199kw標(biāo)定轉(zhuǎn)速：750 r/min機(jī)aE馬力270.75hp減速后轉(zhuǎn)速：297.62r/min減速比：i = 2.52減速箱效率4g：0.96軸系效率4s：0.98最大持續(xù)功率：262.63hp相應(yīng)轉(zhuǎn)速：235.85rpm3.推進(jìn)因子的確定(1)伴流分?jǐn)?shù)本船為單槳海上漁船，故使用漢克歇爾公式估算=0.77*Cp-0.28=0.222(2)推力減額分?jǐn)?shù)t ,用漢克歇爾公式估算t=0.77*C p-0.3=0.203(3)相對(duì)旋轉(zhuǎn)效率近似地取為T(mén) R =1.0(4)船身效率4 h =(1-t)/(1- 3)=(1-0.203)/(1-0.222)=1.0244 .槳葉

5、數(shù)Z的選取根據(jù)一般情況，單槳船多用四葉，加之四葉圖譜資料較為詳盡、方便查找, 故選用四葉。5 . AE/A0的估算按公式 Ae/A0= (1.3+0.3XZ) XT / (p0-pv)D2 + k 進(jìn)行估算，其中：T=PE/(1-t)V=137.2/(1-0.203 X 11X 0.5144)=30.3kN水溫 15 c 時(shí)汽化壓力 pv=174 kgf/m2=174 x 9.8 N/m 2=1.705 kN/m2 靜壓力 pc=pa+T hs=(10330+1025X 1.5) X9.8 N/m 2=116.302 kN/m2 k 取 0.2D 允許=0.7XT=0.7X2.2=1.5Ae/

6、A0= (1.3+0.3XZ) XT / (p0-pv)D2 + k=(1.3+0.3X4) X 30.3/(121.324-1.705)X 2.2X2.2)+0.2 = 0.4946 .槳型的選取說(shuō)明由于本船為海上漁船，MAU型原型螺旋槳比較適合在海洋中工作的要 求。所以選用MAU型較適宜。7 .根據(jù)估算的AE/A0選取23張圖譜根據(jù) Ae/A0=0.494選取 MAU4-40, MAU4-55 , MAU4-70 三張圖譜。8 .列表按所選圖譜(考慮功率儲(chǔ)備)進(jìn)行終結(jié)設(shè)計(jì)，得到3組螺旋槳的要素及VsMAX功率儲(chǔ)備取16%,軸系效率”s=0.98,齒輪箱效率t g=0.96 螺旋槳敞水收到功

7、率Pdo = Psx0.9X0.98X q sx 刀 g=199X0.84X0.98X 0.98X0.96=159.13kw = 213.3 hp (English)由圖譜可查得：項(xiàng)目單位數(shù)量假定力速VKn91011VA=Vs(12)Kn7.007.788.56Bp=n*(PD0A0.5)/(VAA2.5)33.5325.7420.28(BpA0.5)5.795.074.50MAU4-40668.561.255.0P/D0.6750.7160.760Y 00.5880.6240.653PTEhp128.43136.29142.63MAU4-55667.160.054.1P/D0.720.768

8、0.816Y 00.5730.6080.636PTEhp125.15132.80138.91MAU4-70666.559.253.2P/D0.7360.7830.836Y 00.5520.5800.607PTEhp120.57126.68132.58相應(yīng)曲線（如下圖1-1所示）得到數(shù)據(jù)系列/項(xiàng)目Vmax/knP/DD/mP6Y 0MAU4-4010.350.7331.591.1658.660.636MAU4-5510.290.7821.561.2258.140.617MAU4-7010.220.7941.541.2357.820.586圖1-19 .空泡校核，由圖解法求出不產(chǎn)生空泡的(AE/A

9、0)MIN及相應(yīng)的VsMAX、P/D、4 0、D.按柏努利空泡限界線中商船上限線，計(jì)算不發(fā)生空泡之最小展開(kāi)面積比。槳軸沉深hs由船體比例取1.5mpo-pv= pa+丫 hs-pv =(10330+1025 x 2-174) kgf/m 2 =11591kgf/m2計(jì)算溫度 t =15 C , p v = 174 kgf/m 2Pdo = 156.78 kw = 213.3 hp (English)p =104.63 kgfx s2/m4廳p項(xiàng)目單位數(shù)值MAU4-40MAU4-55MAU4-701AE/Ao0.400.550.702VmaxKn10.3510.2910.223VAm/s4.14

10、14.1154.0904(0.7 兀 ND/60)A2(m/s)A2300.82289.58282.205(V(0.7R)A2(m/s)A2317.96306.51298.930.5 p (V(0.7R)A216634.0816035.0715638.496b =(Po-Pv)/(0.5 p(V(0.7R)F2)0.6970.7230.7417T C0.1720.1780.1828T=75*Po* 4 o/VAKgf2934.12864.42737.29Ap=T/( T C*0.5 pmA21.0261.0040.962(V(0.7R)42)10AD=Ap/(1.067-0.229*P/D)m

11、A21.1411.1311.08611Ao=Tt (Da2)/4mA21.9861.9111.86312需要的AE/Ao0.5740.5920.583空泡校核圖如下數(shù)據(jù)分析據(jù)上述結(jié)果作圖二，可求得不發(fā)生空泡的最小盤(pán)面比及對(duì)應(yīng)的最佳螺旋槳要素：Ae/A0=0.5923, P/D=0.7884, D=1.5534m,4 0=0.6093,VMAx=l0.l4kn圖1-2空泡校核10 .計(jì)算與繪制螺旋槳無(wú)因次敞水性征曲線由B4-40,B4-55,P/D=0.735的敞水性征曲線內(nèi)插得到 B4-50.5, P/D=0.735的敞水性征曲線，其數(shù)據(jù)如下：J00.10.20.30.40.50.60.70.

12、80.9KT0.34840.31840.27280.250.21280.170.12710.080.03718010KQ0.41840.388460.355640.318460.282820.250.20.15430.08710.02434000.122820.250.367180.454360.551540.63590.643080.55898013圖1-3螺旋槳無(wú)因次敞水性征曲線11 .計(jì)算船舶系泊狀態(tài)螺旋槳有效推力與保持轉(zhuǎn)矩不變的轉(zhuǎn)速No由敞水性征曲線得 J=0時(shí)，Kt=0.348, Kq=0.0419計(jì)算功率 PD=199*0.96*0.98/0.735=154.72hp系柱推力減額分

13、數(shù)取t0=0.04,主機(jī)轉(zhuǎn)矩Q=Pdx60X 75/(2 兀 N)=254.72 X 60X 75/(2 X 3.1416X 297.62)= 612.72 kgf.m系柱推力T=(K t/K q)義(Q/D)=(0.348/0.0419)義(612.72/1.5534)= 3276.01 kgf車(chē)葉轉(zhuǎn)速N0=60 X VT/( p X D4X Kt)=60 義(3276.01/(104.63X 1.55344X 0.348)0.5=235.85 rpm12 .槳葉強(qiáng)度校核按我國(guó)1990鋼質(zhì)海船入級(jí)與建造規(guī)范校核t0.25R及t0.6R,應(yīng)不小于按下式計(jì)算所的之值：t=，Y/(K-X) (mm

14、)式中 y=A 1X Ne/(Z XbX N),X=A 2 X G X Ad X N2 X D3/(1010XZX b)計(jì)算功率Ne=262.62hpAd= Ae/A0=0.5923,P/D=0.7884, £ =10o, G=7.6gf/cm3, N=297.62rpm在0.6R處切面弦長(zhǎng)b0.6=2.1867X AE/A0XD/Z=0.502mb0.25R=0.7212X b0.6R=0.362m項(xiàng)目單位數(shù)值0.25R0.60R弦長(zhǎng)bm0.3620.502K1634307K2250151K31410635K4434A12186791Y1332.4814347.6605K58223

15、K63412K74165K8380330A213251161材料系數(shù)K （鋁青銅）Kgf/cmA31.2001.200X0.13680.08644tmm35.40217.669標(biāo)準(zhǔn)槳葉厚度tAmm59.1833.86第10頁(yè)共16頁(yè)校核結(jié)果滿足要求滿足要求實(shí)取槳葉厚度mm59.1833.8613 .槳葉輪廓及各半徑切面的型值計(jì)算最大切面在0.66R處，b0.66R=0.226*D* A E/A0/(0.1*Z)=0.520m軸線處最大厚度 =0.050D=0.050X 1.55X 1000=77.67mm(單位：mm)實(shí)際槳葉厚度MAU型4葉螺旋槳尺度表列表計(jì)算如下：最大連續(xù)功率PD=262.

16、63hp,此時(shí)N0=235.85 rpm(Pd/N)1/3= (582/314.8) 1/3= 1.036根據(jù)中文課本P198圖9-1可查得螺旋槳槳軸直徑dt=150mm采用整體式螺旋槳，則螺旋槳的轂徑dh=1.8dt=1.8X150=270mm轂前后兩端的直徑 d2=0.88 x dh=0.88 x 270=237.6mmd1=1.10X dh=1.10 X 270=297mm槳轂長(zhǎng)度 l0=dh+100=370mm減輕孔的長(zhǎng)度 1i=0.3X10=0.3 X370=111mm轂部筒圓厚度 6 =0.75Xt0.2R=0.75X 63.07=47.30mm葉面、葉背與轂連接處的圓弧半徑r1=

17、0.033D=0.033 乂 1553.4 乂 1000=53.8mm , r2=0.044D=0.044 乂 1.5534 乂1000=68.35mm15 .螺旋槳總圖繪制（詳見(jiàn)螺旋槳設(shè)計(jì)總圖）附紙16 .螺旋槳重量及轉(zhuǎn)動(dòng)慣量計(jì)算鋁青銅材料重量密度 Y=8410kgf/m3 , 0.66R處葉切面的弦長(zhǎng) bo.6=0.520mm,螺旋槳直徑 D=1.55m 10.2=0.0 6307 m,to.6= 0.03386m最大連續(xù)功率 PD=262.63hp,止匕時(shí)N0=235.85 rpm轂徑 d=0.167X dt=0.167X 1.5534=00.2700m, 轂長(zhǎng) Lk=0.3700m槳轂

18、長(zhǎng)度中央處軸徑d0=0.045+0.108(PD/N)1/3-KL k/2=0.045+0.108X (582/314.8)/3-0.1 X 0.3934/2=0.0666md/D=0.174則根據(jù)我國(guó)船舶及海洋工程設(shè)計(jì)研究院提出的公式：槳葉重Gbl=0.169TZbmax(0.5t0.2+t0.6)(1-d/D)D(kgf)=0.169 X 8410 X 4 X 0.520X (0.5 X 0.06307+0.03286)X (1-0.174)又 1.5534=248.06kgf槳轂重Gn=(0.88-0.6d0/d)LK 丫 d2(kgf)二(0.88-0.6X 0.0666/0.2700)X 0.3700X 8410X 0.27X 0.27=166.05kgf螺旋槳重量G= Gbl +Gn= 414.1kgf螺旋槳慣性矩I mp=0.0948T Zbmax(0.5t0.2+t0.6)D3=0.0948X8410X4X 0.52X (0.5義 0.06307+0.03386)X (1.5534A3)2=406.5kgf m s17 .設(shè)