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快(2)羊zcno


快羊 快
25 [ 1 ] 1 2 3污宋米 3 妊 4PVPV 5 6 8 10 11 [ 1 ] 1C 6B 2ACBD 7C 3B 8D 4D 9B 5D 10B

34 1 1 1m N2=1000/D=1000(250x3.14)=1.27 N1=i N2=40x1.27=50.96() 2 q=d1/m=808=10 =arctan z1 1 =arctan =7.125o q 8 4

1 ? v=arctanfv= arctan =10.204o 8

芍 ? v 4

3完

1 =

tan tan 7.125o = = 0.401 tan( + ? v ) tan(7.125o + 10.204o )

T2 = 5 0.125 = 0.625kN ? m
T1 = T2 0.625 = = 0.039kN m i 1 40 0.401
T1 0.039 = = 0.39m F 0.1

: l =

6

1 :
Fe v 1000 1000 P 1000 7.5 Fe = = v 10 P=

2
=750N

2

Fe = F1 ? F2 F1 = 2 F2 F2 = Fe =750N F1 = 2 F2 =2x750=1500N 2 2 2

30 [ 10 ] 1 2 3 4 5 6 1.竹 7 10‾ 竹8 竹9

1 0.5 1 0.5

2 10 :i=n/nD=1440/30=48 鋁 (i=3) (i=16) 2 4

1

2

1鋁 2 4-2

4

3 -忌- 抖 1 2.5 2 IIIII 妊忌 2 3 Ft Fr Fa 5.5


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