Pc
sF = FtKFYFYβYε/(vFbm)
vF = 0,85 , [1c. 51],
Y , : zV = z/cosd
z1 = 20 zV1 = 20/cos21,80 = 21,5 YF1 = 4,02 [1. 42]
z2 = 50 zV2 = 50/cos68,20 = 135 YF2 = 3,6
[sF] / YF:
[sF]1 / YF1 = 288/4,02 = 71,6 ;
[sF]2 / YF2 = 273/3,6 = 75,8 .
[sF]2/YF2 > [sF]1/YF1
Yε = 1,0
KF = KFαKFbKFV = 1,01,30×1,361,2 = 2,12,
KFb=1,30 ybd= 0,44 [2c. 30]
KFα = 1,0 [2 c.32]
KFV = 1,36 V =14,81 / [2c. 29]
K = 1,2 [2c.28].
sF1 =2890×2,12×4,02/(0,85×42×4,80) =144 .
sF1 < [sF]1 .
sFmax = sFT1max/T1 < sFPmax
T1max/T1 = 1,7
σFPmax = 1,7σ`FP = 1,7288 = 490
sFmax =1441,7 = 245 < sFPmax = 490
,
3.
;
[t]=15÷25 [1c.161]
d1 = (16138,7103/π15)1/3 = 33
- ( 710 ͷ, , 45÷56 ) d = 55 , :
d1 = 45 ;
d1 = 50 ;
d1 = 55 .
d1 = 45 .
d2 = (16334,8103/π20)1/3 = 44
:
d2 = 45 ;
d2 = 50 ;
d2 = 55 .
d2 = 60 .
3.4. :
d = 1,6d = 1,660 = 96
l = (1,21,7)d = (1,21,7)60 = 72102
l = 80
d = (3÷4)m = (3÷4)4,8 =16
= (0,1÷0,17)R = (0,1÷0,17)150 = 15÷25
= 16
4.
d = 0,05Re+ 1 = 0,05150 + 1 = 8 d = 8
b = 1,5d = 1,58 = 12
= 2,35d = 2,358 = 20
:
- d1 = 0,072Re+ 12 = 0,072150 + 12 = 22
20;
-
|
|
|
d2 = 0,75d1 = 0,7520 = 15
16;
- d3 = 0,6d1 = 0,620 = 12
12.
5
: ; . .
; - . 21,20 Re =150 .
, .
7311 7211 .
1.
| d, | D, | B, | C, | C0, | Y | ||
| 7311 | 134,0 | 110,0 | 0,33 | 1,80 | |||
| 7211 | 85,0 | 58,0 | 0,41 | 1,46 |
:
- 10 ;
- -
8 ;
- , , .
:
1= /2 + (d+D)e/6 = 29/2+(55+120)∙0,33/6 = 24 .
2= /2 + (d+D)e/6 = 21/2+(55+100)∙0,41/6 = 21 .
f1 = 72 , 1 = 100 ; f2 = 50 , 2 = 147 .
6.
