船舶動(dòng)力裝置優(yōu)質(zhì)課程設(shè)計(jì)蘇星

1、船舶動(dòng)力裝置課程設(shè)計(jì)一、設(shè)計(jì)目日勺1、進(jìn)一步掌握艦船動(dòng)力裝置日勺基本概念和基本理論；2、掌握船機(jī)漿設(shè)計(jì)工況選擇勺理論和措施；3、掌握工況船舶采用雙速比齒輪箱速比優(yōu)先選計(jì)算措施；4、掌握主機(jī)選型勺基本環(huán)節(jié)措施；5、初步掌握船機(jī)漿工況配合特性勺綜合分析措施。二、基本規(guī)定1、獨(dú)立思考，獨(dú)立完畢本設(shè)計(jì)；2、措施合適，環(huán)節(jié)清晰，計(jì)算對(duì)勺；3、書(shū)寫(xiě)端正，圖線清晰。三、已知條件1、船型及重要尺寸船型：?jiǎn)螜C(jī)單槳拖網(wǎng)漁船主尺度序號(hào)尺度單位數(shù)值1水線長(zhǎng)M41.02型寬M7.83型深M3.64平均吃水M3.05排水量T400.06漿心至水面距離M2.5(3)系數(shù)名稱方形系數(shù)Cb菱形系數(shù)Cp舯刻面系數(shù)數(shù)值0.510.

2、600.895(4)海水密度 p=1.024T/M32、設(shè)計(jì)航速狀態(tài)單位數(shù)值自航KN10.4拖航KN3.83、柴油機(jī)型號(hào)及重要參數(shù)序號(hào)型號(hào)標(biāo)定功 率(KW)標(biāo)定轉(zhuǎn)速 (r/min)柴油消耗率(g/kw h)重量(kg)外形尺寸(LXAXH) mm16E150C-11637502382500X 998X132526E150C-122075023832902553X856X144038E150C-A217100022827002065X1069X140548E150C-A289100022835002591X957X140556160A-13164100023839003380X880X15556

3、X6160ZC220100021837003069X960X151276160A-116075023837003380X880X15558N-855-M195100017511769NT-855-M267100017912581989X930X151110TBD234V832010002124、齒輪箱重要技術(shù)參數(shù)序號(hào)型號(hào)額定傳遞能 力 kw/(r/min)額定輸入 轉(zhuǎn)速 (r/min)額定扭矩N*m額定推力KN速比13000.184-0.257750-15001756.2-2459.849.02.04,2.5,3 ,3.53,4.12D3000.184-0.2571000-25001193.6

4、4-2459.849.04,4.48,5.05,5.5,5.9, 7.633240B0.1841500175630-501.5,2.34SCG30010.16-0.22750-230030-501.5,2.3,2.5,3.55SCG35010.257750-23001.3,2.3,2.5,3.5,46SCG35030.2571000-23004.5,5,5.5,6,6.5,77SCG25030.1841000-23004,4.5,5,6,6.5,78GWC32350.45-1.35-18004283-12858112.72.06,2.54, 3.02,3.57, 4.05,4.955、雙速比齒

5、輪箱重要技術(shù)參數(shù)序號(hào)型號(hào)額定傳遞能 力 kw/（r/min）額定輸入轉(zhuǎn)速 （r/min）額定推力KN速比1GWT36.390.42-1.23400-100098.072-62GWT32.350.52-1.32-1800112.782-63MCG4100.74-1.84400-1200147.01-4.54S3000.18-0.26750-250049.032.23,2.36，2.52,2.565SD3000.18-0.24750-250049.03,4,4.48,4.6,4.95四、計(jì)算與分析內(nèi)容1、船體有效功率，并繪制曲線2、擬定推動(dòng)系數(shù)3、主機(jī)選型論證4、單速比齒輪箱速比優(yōu)選，槳工況特性分

6、析5、雙速比齒輪箱速比6、綜合評(píng)判分析五、參照書(shū)目1、漁船設(shè)計(jì)2、船舶推動(dòng)3、船舶概論4、船舶設(shè)計(jì)實(shí)用手冊(cè)（設(shè)計(jì)分冊(cè)）六、設(shè)計(jì)計(jì)算過(guò)程與分析1、計(jì)算船體有效功率(1)經(jīng)驗(yàn)公式：EHP=(E0+AE)AL式中：EHP-船體有效馬力,-排水量(T), L-船長(zhǎng)(M)。在式中 船長(zhǎng)為41.0M時(shí)，-EH勺修正量極微，可忽視不計(jì)。因此式可簡(jiǎn)化為EHP=E0 -Vl。根據(jù)查漁船設(shè)計(jì)5、可知 E0 計(jì)算如下：船速 v=10.4 X 1.852 : 3.6=5.35M/S , L=41.0,Cp=0.60;V/(L/10)3=(400.0 : 1.024)/(41 : 10)3=5.67;v/Vgl=5.3

7、5/V(9.8 X 41)=0.27;通過(guò)查漁船設(shè)計(jì)可得E0=0.072。(2)成果：EHP=E0 X X VL =184.412、不擬定推動(dòng)系數(shù)公式 PXC=PE/PS=ncXnsXnpXnr式中PE:有效馬力；ps：主機(jī)發(fā)出功率；nc：傳動(dòng)功率；ns：船射效率；np： 散水效率；nr：相對(duì)旋轉(zhuǎn)效率。參數(shù)估算伴流分?jǐn)?shù)：w=0.77Cp 0.28=0.182推力減額分?jǐn)?shù)：由漁船設(shè)計(jì)得t=0.77Cp 0.3=0.162ns= (1t) / (1w) = (10.162) / (10.182) =1.02取 nc=0.96；np=0.6；nr=1.0成果 PXC=ncXnsXnpXnr=0.96

8、X1.02X0.6X1.0=0.5753、主機(jī)選型論證(1)根據(jù)EHP和PXC選主機(jī)主機(jī)所需最小功率 Psmin=PE/(PXC)=184.41/0.575=320.7 馬力=235.7KW參數(shù) 10%功率儲(chǔ)藏：Ps=PsminX(1+10%)=259.27KW查柴油機(jī)型號(hào)及重要參數(shù)表選擇NT-855-M型柴油機(jī)參數(shù)：額定轉(zhuǎn)速：1000r/min額定功率：267KW燃油消耗率：179g/kw.h(2)設(shè)計(jì)工況點(diǎn)初選a、取漿徑為1.9M，葉數(shù)Z=4,盤(pán)面比為0.40和0.55b、擬定漿轉(zhuǎn)速范疇225r/min左右4、單速比齒輪速比優(yōu)選，槳工況點(diǎn)配合特性分析設(shè)計(jì)思想：按自航工況下設(shè)計(jì)設(shè)計(jì)參數(shù)及計(jì)算

9、：a、螺旋槳收到日勺馬力DHP：DHP=EHP/(nsXnpXnr)=184.41/(1.02X0.6X 1.0)=301.3 馬力b、血=寸(DHP/p) = (301.3/1.024) =17.15c、槳徑 D:D=1.6隊(duì)自航航速vs=10.4KN拖航航速vs、=3.8KNe、進(jìn)速 va=vs (1-w) =10.4X( 1-0.182) =8.51f、估計(jì)槳轉(zhuǎn)速：225r/min根據(jù)圖譜計(jì)算具體計(jì)算根據(jù)槳徑D=1.9M,用B4-40和B4-55圖譜計(jì)算轉(zhuǎn)速為200r/min , 225r/min,250r/min,275r/min,300r/min,航速為 10.4KN 時(shí)槳勺螺距比

10、H/D,敞水效 率np,并繪制圖譜求得最佳np和H/D。列表計(jì)算：序號(hào)計(jì)算項(xiàng)目1槳徑D(M)1.91.91.91.91.92槳轉(zhuǎn)速n(r/min)2002252502753003航速VS(kn)10.410.410.410.410.44進(jìn)速VA(rw)8.518.518.518.518.515直徑系數(shù)8=3.28nD/VA146.5164.8183.1201.4219.76功率系數(shù)Bn=nVp/VA2.516.218.320.322.324.4查孑B4-40圖譜7np0.6080.6260.6150.5990.5818H/D1.070.990.810.760.649H(M)2.031.881.

11、541.441.22查孑B4-55圖譜10np0.6050.6210.6090.5910.5711H/D1.050.910.870.730.7012H(M)2.001.731.651.391.33作 圖 擬 定 槳 各 項(xiàng) 最 佳 參 數(shù)B4-40B4-55(6)通過(guò)作圖擬定槳日勺各相應(yīng)參數(shù):項(xiàng)目B4-40B4-55槳速r/min230225np0.6230.621H/D0.970.91H(M)1.841.84D(M)1.91.9通過(guò)作圖擬定出此船在自航狀態(tài)下即航速VS=10.4KN時(shí)，槳日勺最佳轉(zhuǎn)速，從而精確得出自航狀態(tài)下日勺減速比。選擇單速比齒輪箱參數(shù)：a、主機(jī)輸出扭矩 Ne=9550 P

12、N/nN=267/1000X9550=2550N Mb、主機(jī)轉(zhuǎn)速 n=1000 r p mc、減速比i=4.5根據(jù)以上參數(shù)選擇：齒輪箱型號(hào)：SCG3503外形尺寸：854X880X1312傳遞能力：0.257kw/r/min分析自航狀態(tài)下勺機(jī)槳配合特性np nc(%)圖中A點(diǎn)為船自航狀態(tài)下勺設(shè)計(jì)配合點(diǎn)，即額定工況點(diǎn)，此時(shí)主機(jī)在設(shè)計(jì) 負(fù)荷下工作，主機(jī)可發(fā)出額定功率，螺旋槳亦可發(fā)出設(shè)計(jì)推力，使船在自航設(shè)計(jì) 航速即10.4KN航行。雙速比齒輪箱速比優(yōu)選、槳工況配合分析設(shè)計(jì)思想：根據(jù)拖航工況選擇減速比，由上面自航時(shí)日勺兩種盤(pán)面比相應(yīng)日勺參數(shù)求出拖網(wǎng)時(shí) 再吸取所有主機(jī)功率狀況下具有日勺最大推力日勺螺旋槳

13、日勺轉(zhuǎn)速及減速比。設(shè)計(jì)參數(shù)：拖航航速：vs=3.8kn進(jìn)速：va=.515vs (l-w) =1.71m/s具體計(jì)算(查船舶原理與推動(dòng)P186)序號(hào)計(jì)算項(xiàng)目1槳徑D(M)1.91.91.91.91.92槳轉(zhuǎn)速2002252502753003航速VS(kn)10.410.410.410.410.44進(jìn)速VA(rw)1.711.711.711.711.715,60VJan - D0.270.240.220.200.186八DHP x 75 x 60虹2兀n1079.5959.6863.6785.1720.17K 3600 QmMp n 2 D 50.03830.02690.01950.01470.

14、0114查B4-40圖譜8H/D0.870.720.630.530.4349Kt0.2950.240.1960.1650.0910np0.3360.3380.3410.3450.3511T Kt QmK4376450645684638452312Te=T(1-t)36673776382838873700查B4-55圖譜13H/D0.850.700.620.5250.4314Kt0.2930.2360.1920.1630.08915np0.3330.3350.3380.340.34616T Kt Qm Km D4346443145414582447317Te=T(1-t)364237133805

15、38403659作圖擬定最佳參數(shù)B4-4O0.40.30.20.11003004000.40.30.20.1100300400B4-550.40.30.20.40.30.20.14200400033003BOO(10)通過(guò)兩種盤(pán)面比日勺螺距比擬定槳日勺轉(zhuǎn)速、敞水效率項(xiàng)目B4-40B4-55D(m)1.91.9H/D0.720.80np0.3380.334n(r/min)225220相應(yīng)減速比4.444.54(11)空泡校核項(xiàng)目B4-40B4-55VS(kn)3.83.8va=0.515vs (1-w)1.61.6D(m)1.91.9H/D0.720.80np0.3380.3340.7兀 ND260 J246.52