螺旋桨设计计算书文档格式.docx
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65.2
59.7
54.6
6
P/D
0.65524
0.692275
0.727967
0.76385
7
η0
0.572
0.604
0.632
0.655
8
THP=PDηHηOηr
Hp
1775.256
1874.571
1961.472
2032.855
9
MAU4-55
0.696496
0.732956
0.77191
0.812015
0.555
0.588
0.617
0.642
1722.495
1824.914
1914.918
1992.508
MAU4-70
71.2
63.9
58.2
53.2
0.705132
0.746196
0.788796
0.835426
15
0.535
0.564
0.609
16
1660.423
1750.427
1890.089
根据MAU4-40,MAU4-55,MAU4-70的Bp-δ图谱列下表计算。
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:
MAU4-40Vs=11.83Kn
MAU4-55Vs=11.73Kn
MAU4-70Vs=11.56Kn
7.初步确定桨的要素
MAU
设计航速Vs(kn)
D(m)
4-40
11.83
0.722
60.6
3.48
0.628
4-55
11.73
0.761
59.6
3.39
0.610
4-70
11.56
0.77
59.9
3.36
0.578
8.空泡校核
根据柏利尔商船界限线计算
桨轴沉深hs=T–ZP=3.5m
计算t=15°
C,则Pv=174kgf/m2
取水温15度,Pa-大气压为:
10330Kgf/m2
P0-Pv=Pa–Pv+hsγ=13743.5kgf/m2
MAU4-40
MAU4-70
Vs
VA=0.5144(1-ω)Vs
m/s
4.576185
4.537502
4.471741
(0.7πND/60)2
(m/s)2
390.4305
371.2937
364.249
V0.7R2=VA2+(3)
411.372
391.8826
384.2454
σ=(Po-Pv)/0.5ρV0.7R2
0.638611
0.670371
0.683695
τc(查图6-20)
0.218
0.225
0.228
T=(Q/D)·
(KT/KQ)
kgf
14938.75
14634.27
14070.49
Ap=T/(τc·
0.5ρV0.7R2)
m2
3.184174
3.172535
3.070008
AE=Ap/(1.067-0.22P/D)
3.531449
3.553741
3.446852
AE/AD=AE‘/πD2/4
0.371686
0.39331
0.388858
9.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。
AE/A0=0.40;
MAU4-40桨;
Vs=11.83Kn;
P/D=0.722;
D=3.48m;
η0=0.628
N=155r/min
强度校核
根据2001年《钢制海船入籍建造规范》校核t0.25R及t0.6R应不小于按下式计算之值:
Y=1.36A1Ne/(ZbN)
X=A2GAdN2D3/(1010Zb)
计算功率:
Ne=Ps×
ηS=1714×
0.97=1662.58HP
D=3.48m
Ad=AE/AO=0.4
P/D=0.722ε=10o
G=7.5g/cm3N=155r/min
b0.66R=0.226DAd/(0.1Z)=0.78648
b0.25R=0.7212b0.66R=0.5672b0.6R=0.9911b0.66R=0.7795
项目
0.25R
0.6R
弦长b
0.567
0.78
K1
634
207
K2
250
151
K3
1410
635
K4
34
A1=D/P(K1-K2D/P0.7R)+K3D/P0.7R-K4
2347.4
842.5
Y=A1Ne/ZbN
11101.8
2896.5
K5
82
23
K6
K7
41
65
K8
380
330
A2=D/P(K5+K6ε)+K7ε+K8
1374.5
1178
材料系数K(锰铝黄铜)
1.17
1.17
X=A2GAdN2D3/(1010Zb)
0.184
0.115
t=[Y/(K-X)]0.5
106.1
52.4
MAU标准桨厚度t’
133.1
75.9
校核结果
满足要求
实取桨叶厚度
10.确定设计的螺旋桨各切面厚度
桨叶厚度查表8-4MAU标准桨可得出各切面最大厚度为:
t0.2R=141.3mmt0.3R=124.9mmt0.4R=108.6mmt0.5R=92.2mm
t0.6R=75.9mmt0.7R=59.5mmt0.8R=43.2mmt0.9R=26.8mm
11.螺距修正
螺距比为:
P/D=(P/D)0=0.722
12.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:
Gbl=0.169γ·
Zbmax(0.5t0.2+t0.6)(1-d/D)D
=0.169·
7500·
4·
0.7865·
(0.5·
0.141+0.076)·
(1-0.18)·
=1667kgf
桨毂重:
Gn=(0.88-0.6·
d0/d)LKγd2
=(0.88-0.6·
0.236/0.6264)0.470·
0.62642
=904.5kgf
螺旋桨重量:
G=Gbl+Gn=1667+904.5=2571.5kgf
螺旋桨的惯性矩:
Imp=0.0948γ·
Zbmax(0.5t0.2+t0.6)D3
=0.0948·
0.7865(0.5·
0.141+0.076)·
3.483
=13810.3kgf·
cm·
s2
13.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,P/D=0.722的敞水性征曲线,其数据见下表。
J
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
KT
0.30188
0.277565
0.259246
0.221475
0.18797
0.152087
0.112099
0.068668
0.020629
KQ
0.032807
0.030781
0.028503
0.025946
0.023086
0.019905
0.016315
0.01198
0.006595
14.系柱特性计算
由上图得J=0时,KT=0.302,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/(2πN)=7682.16kgf·
m
系柱推力T=KTQ/KQD=20321kgf
螺旋桨转速N=60SQRT(T/ΡD4KT)=125.64r/min
15.螺旋桨计算总结
螺旋桨直径D=3.48m
螺距比P/D=0.722
叶数Z=4
型式MAU型
盘面比AE/Ao=0.40
纵倾角ε=10o
螺旋桨效率η0=0.628
设计航速Vs=11.83kn
毂径比db/D=0.18
旋向双桨外旋
材料锰铝黄铜
重量2571.5kgf
惯性矩13810.3kgf·
s2
15.螺旋桨型值表(详见附EXCEL表)
螺旋桨桨叶轮廓尺寸表:
r/R
0.9
0.95
从母线到叶片随边的距离
219.899808
263.07756
304.83965
342.43339
377.19581
403.70018
412.03687
381.36415
330.87214
135.98239
从母线到叶片导边的距离
303.423984
348.0174
380.02714
399.53184
402.28452
379.94849
318.76034
197.64242
106.56804
叶片宽度
523.323792
611.09496
684.86678
741.96523
779.48033
783.64867
730.79722
579.00658
437.44018
叶片厚度
141.288
124.932
108.576
92.22
75.864
59.508
43.152
26.796
18.792
10.44
从导边至最厚点的距离
167.463613
195.55039
219.15737
241.1387
272.03863
315.02677
332.51273
283.13422
218.72009
MAU型螺旋桨切面尺寸表:
叶宽b
523
最大厚度t
141
X
10.46
20.92
31.38
52.3
78.45
104.6
156.9
167.36
209.2
261.5
313.8
366.1
418.4
470.7
496.85
Yo
49.35
73.1085
84.2475
93.2715
107.2305
120.2025
130.002
140.718
137.8275
126.8295
110.1915
89.0415
63.8025
35.673
21.15
6.345
Yu
34.1925
26.8605
14.1
7.614
3.3135
611
125
12.22
24.44
36.66
61.1
91.65
122.2
183.3
195.52
244.4
305.5
366.6
427.7
488.8
549.9
580.45
43.75
64.8125
74.6875
82.6875
95.0625
106.5625
115.25
124.75
122.1875
112.4375
97.6875
78.9375
56.5625
31.625
18.75
5.625
30.3125
23.8125
12.5
6.75
2.9375
685
109
13.7
27.4
41.1
68.5
102.75
137
205.5
219.2
274
342.5
411
479.5
548
616.5
650.75
38.15
56.5165
65.1275
72.1035
82.8945
92.9225
100.498
108.782
106.5475
98.0455
85.1835
68.8335
49.3225
27.577
16.35
4.905
26.4325
20.7645
10.9
5.886
2.5615
742
92
15.0626
30.1252
45.1878
75.3872
113.0066
150.7002
226.0874
241.15
300.0648
373.7454
447.3518
521.0324
594.713
668.3194
705.1968
32.2
47.702
54.97
60.858
69.966
78.43
84.824
91.816
89.93
82.754
71.898
58.098
41.63
23.276
13.8
4.14
22.31
17.526
9.2
4.968
2.162
779
76
16.1756
32.3512
48.5268
80.9522
121.3912
161.8302
242.7824
258.958
315.7952
386.8046
458.2592
528.8976
599.907
670.9906
706.4582
26.6
39.406
45.41
50.274
57.798
64.79
70.072
75.848
74.29
68.362
59.394
47.994
34.39
19.228
11.4
3.42
21.291
784
60
19.6784
39.4352
59.1136
98.4704
147.7056
196.9408
295.4896
315.168
370.2832
439.2752
508.1888
577.1808
646.0944
715.0864
749.504
21
31.11
35.85
39.69
45.63
51.15
55.32
59.88
58.65
53.97
46.89
37.89
27.15
15.18
2.7
14.55
11.43
3.24
1.41
731
43
20.7604
41.5208
62.2081
103.7289
155.5568
311.1136
331.874
378.8042
437.5035
496.2028
554.9021
613.6014
672.3007
701.6869
15.05
22.2955
25.6925
28.4445
32.7015
36.6575
39.646
42.914
42.0325
38.6785
33.6045
27.1545
19.4575
10.879
6.45
1.935
10.4275
8.1915
4.3
2.322
1.0105
579
27
17.7174
35.3769
53.0943
88.4712
132.7068
176.9424
265.4715
283.131
317.9289
361.4118
404.9526
448.4934
491.9763
535.4013
557.2296
8.2242
13.0194
14.9391
16.8588
20.007
23.0175
24.894
26.946
26.3925
24.2865
21.1005
17.0505
12.2175
6.831
4.05
1.215
6.237
5.1408
4.1121
2.7405
1.458
0.6345
437
19
13.6781
27.3125
40.9906
68.3031
102.4328
136.5625
204.8219
218.5
244.