:
Lmin = l+l0+∑hi+hmin = 2.0,3+1,8+8,0+0,5 = 10,9 11,
l = 2d = 2∙0,3 = 0,6 ();
l0 = 1,8 ;
hmin =0,5 .
- , =1, - Sr > 0,85 , =0,8.
- , , , IL<0, , - 1.
- , , =1
U , .1
- i- .
- i- , .
, 2.
R , .
, | zi, | , | |||
IL=0,52 | 2,0 | 1,0 | |||
1,0 | 1,5 | 1,0 | |||
1,5 | 3,75 | - | - | - | |
, , | 2,0 | 5,5 | 1,0 | 114,0 | |
1,5 | 6,25 | 58,5 | 1,0 | 87,75 | |
IL=0,19 | 0,6 | 8,3 | 1,0 | 37,8 | |
∑ = 277,55 |
3.1
zi , .
n=N×k/ =1,7×8536,6/779,2=18,6 -20
k , .
N .
: na=n/nb=20/2=10
=(l 2*0,25 0,3)/9 = (10,3 2*0,25 0,3)/9 = 1,06 > 3*d = 0,9
, . 1,06 2,2 . 0,25 .
hp, , .. hp= tn+t =0,5+0,6=1,1. h=1,5.
t , d<0,6 , t=2×d=0,6.
|
|
tn , 0,5.
tn =Fv/(4d×Rbt)= 502,7/(4×0,3×950)=0,44.
Fv=Fd/ =779,2/1,55=502,7. - .
Rbt .
= Fv/<1,3×Rb
=502,7/0,09=5585,6<1,3×13000=16900
A - .
, :
Gpw=10,3×3×1,5×(25-10)=695,25 .
No=N+Gpw=7936,9+695,25∙1,1=8632,15 kH
Mo=Fh×h+M=367,83*1,5+3724,95=4276,7 kH×.