l
„ - R. X. Maksudov

l
„
olingan.
Norm al kesimli tasma
__________________ ______________________________________
6.3-jadval
T asm aning
turiari
Yetaklovchi
shkivning
diametri
d t
мм
T asm an in g tezligi i),mm b o i g a n d a
И Д У t
5
10
15
20
25
30
Z
L 0 = 8 0 0
m m
63
0.49
0.82
1.03
-
1.11
-
71
0.56
0.95
1.22
1.40
1.37
-
80
0.62
1.07
1.41
1.65
1.60
-
A
L0
= 1 700.vy.k
90
0.84
1.39
1.75
-
1.88
-
100
0.95
1.60
2.07
2.29
2.31
-
112
1.05
1.82
2.39
2.82
2.74
2.5
В
L0 - 2240 мм
125
1.39
2.26
2.80
-
-
-
140
1.61
2.70
3.45
-
3.83
-
160
1.83
3.15
4.13
4.88
4.73
4.47
С
L0
= 3750.U.W
200
2.77
4.59
5.80
-
6.33
-
224
3.15
5.35
6.95
7.95
7.86
7.06
280
3.48
6.02
7.94
9.60
9.18
9.05
Ensiz ponasimon kesimli tasma
____________^____ __________ ________ _____
6.4-jadal
Yetaklovchi
T asm aning tezligi A m m
T asm aning
turiari
shkiv ning
b o i g a n d a H b.kV t
diametri
d, мм
5
10
20
30
40
SPZ
L{) = 1600лш
63
0.95
1.5
1.85
—
-
71
1.18
1.95
2.73
-
-
80
1.38
2.34
3.50
-
-
SPA
L0 ~ 2500,ил<
90
1.56
2.57
-
-
-
100
1.89
3.15
-
-
-
112
2.17
3.72
5.61
-
-
138
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SPB
L0 = 3550лш
125
2.95
5.00
-
-
-
140
3.45
5.98
9.10
-
-
160
3.80
6.70
10.60
11.50
-
SPC
L0 = 5600.и.и
200
6.05
10.60
16.60
17.10
-
224
6.60
11.50
18.70
20.70
-
280
7.08
12.80 20.90
23.90
22.70
Yarim ponasimon kesimli tasmalar
_________________________________________
6.5-jadval
Tasmaning
turlari
Yetaklovchi
shkivning
diametri
d t мм
Tasm aning tezligi t?,mm
b o ‘lganda [ p ^ k V t
5
10
15
20
25
К
L„ =71
0
m m
50
0,17
0,29
0,40
0,47
0,53
63
0,19
0,33
0,46
0,56
0,62
80
0,21
0,37
0,52
0,64
0,70
L
L0
=
1
6 0 0
m m
100
0,50
0,84
1,12
1,28
1,33
112
0,55
0,95
1,27
1,47
1,53
125
0.59
1,04
1,39
1,63
1,70
M
L0 = 2240мм
180
1,45
2,40
3,02
3,18
3,26
200
1,63
2,76
3,58
3,97
4,04
224
1,80
3,13
4,12
4,66
4,95
Uzatm aning
ishlash
jarayonida,
bitta
normal,
ensiz
yoki
yarim ponasim on tasma yordam ida uzatish mumkin b o ‘lgan quvvatning
hisobiy qiymati quyidagicha aniqlanadi:
И , = H . ■
c a ■
c, c t. / c r
kVt,
[6.26]
bunda:
c a-
yetaklovchi shkiv qam rov burchagini tasmaning tortish
darajasiga t a ’sirini hisobga oluvchi koeffitsiyent, qiymati 6.6-jadvaldan
olinadi.
a,
rad
180
170
160
150
140
130
120
110
Ponasimon
tasmalar uchun
1.00
0.98
0.95
0.92
0.89
0.86
0.82
0.78
Yarimponasimon
tasmalar uchun
1,00 0.97
0.94
0.91
0.98
0.84
0.80
0.76
139
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с , -
tasm aning uzunligini, ishlash m uddatiga ta ’sirini hisobga oluvchi
k o e ffits iy e n tb u n d a ^ .
/L0
nisbat 6.7-jadvaldan olinadi (tasmani bir
son iy ad a uzatmani necha m arta aylanib chiqishi taqqoslanadi).
______________ ___________ _______________ _____
6.7-jadval
C.
-
Lx
/
L„
0,6
0,8
1,0
1,2
1,4
1,6
Ponasim on
normal kesimli
tasm alar uchun
0,89
0,95
1
1,04
1,07
1,10
Ensiz
ponasim on
ham da
yarim ponasim on
kesimli tasm alar
uchun
0,91
0,96
1
1,03
1,06
1,08
c„- uzatish soni koeffitsiyenti, egilishdagi kuchlanishni yetaklanuvchi
sh k iv d a kam ayishining hisobiga olinadi, 6.8-jadval.
^
__________ _____ _____
6.8-jadval
u
1
1.2
1.4
1.8
2.5
c u
1.0
1.07
1.1
1.12
1.14
c p-
yuklanish rejimini hisobga oluvchi koeffitsiyent
yengil rejim
o ‘r ta r e jim
0 2
‘ir r e jim
1.0+1.4
1.1 +1.5
1.2-5-1.6
T asm alarni tanlash. T asm a turiari uzatiladigan quvvat R, k V t aylanishlar
soni rt,min_l ga nisbatan
6.14,6.15, 6.16-rasm
lardan olinadi.
6.14-rasm .
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6.15-rasm.
6.16-rasm.
Ponasim on tasmalar soni yarim ponasimon tasmalar uchun tasmadagi
ariqchalar soni quyidagicha aniqlanadi:
z -
-j—
г
— ■
[z
I
[6.27]
bunda: л -yetaklovchi shkiv valdagi quvvat, kVt: ( „ -tasmalar o ‘n asid a
yuklanishni
notekis taqsimlanishini
hisobga oluvchi
koeffitsiyent
(6.9-jadval).
Tasm alar soni
z
1
2 -3
4—6
>6
. f
1
0.95
0.90
0.95
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Ponasim on tasm alar uchun z < io, yarim ponasim on tasm alar uchun
К kesimli boMganda
[z]<
36, L, M kesimli boTganda, [z]<50.
Yetaklovchi shkiv diametrlarni eng kichik qiymatni tasmani turlari,
aylanish soni ham da uzatilayotgan quvvatga nisbatan 6.10, 6.11-
jadv allard an tanlash m umkin.
6.10-jadval
T asm an in g kesimlari
Yetaklovchi shkiv
dx
,m m
Yetaklovchi valdagi
aylanuvchi m o m en t
7,, N /m
Norm al
kesim
A
90
1 1 -70
V
125
4 0 - 1 2 0
S
200
11 0 -5 5 0
D
315
4 5 0 - 2 0 0 0
Ensiz
kesim
SPZ
63
<150
SPA
90
9 0 - 4 0 0
SPB
140
3 0 0 - 2 0 0 0
SPC
224
> 1 5 0 0
6.11-jadval
и
,MUH
1
Uzatiladigan quvvat
P'
boMganda,
d.
ning
qiymatlari. mm
0.6
1
1.7
2.8
4.5
7
10
14
20
3000
40
45
56
63
71
80
100
112
-
1500
50
56
63
80
90
112
125
140
160
1000
56
63
80
90
100
125
140
160
180
<750
71
90
100
112
140
160
180
200
224
Ilova: P'=P,-Cp.
B o sh la n g ‘ich taranglik kuch, N:
Fo =
7 5 0 - + -<7
■
[6.28]
bunda:
Pr
yetaklovchi valdagi quvvat, kVt;
c p,c a-
koefTitsiyentlari
yuqo rid a berilgan;
г - tasm alar soni yoki y arim p o n asim o n tasm ada
ariqchalar soni; я - l m ponasim on va y arim ponasim on tasm alarning
massasi. kg//in, 6.12-jadval.
142
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6.12-jadval
Tasm aning
kesim turiari
Z
A
В
С
SPZ
SPA
SPB
SPC
q.
kg/m
0.06
0.10
0.18
0.30
0.07
0.12
0.2
0.37
Yarim ponasim on tasma
turiari
К
L
M
q.
kg/m
0.009
0.045
0.16
Ponasim on va
yarim ponasim on tasmali uzatm alar uchun shkiv
o 'lcham lari 6.13-jadvalda berilgan (
6.17-rasm).
Shkivni
hisobiy
diametri sifatida tasm aning neytral qatlamini shkivni
d (6.17-rasm)
to ‘g ‘ri kelgan oMchami olinadi.
T asm aning neytral qatlam i
. J .
6.17-rasm.
________
6.13-jadval
Tasm aning
turi
t i
P
f
h
a. gradus
34
36
38
40
mm fo. i /-rasm;
d t , mm hisobiy diam etr
Z
2.5
8.5
12
8
7
5 0 -
71
8 0 -
100
112-
160
>180
A
3.3
11
15
10
8.7
7 5 -
112
125—
160
180—
400
>450
В
4.2
14
19
12 5
10.8
125-
160
ISO-
224
2 5 0 -
500
>560
С
5.7
19
25.5
17
14.3
-
2 0 0 -
315
355—
630
>710
SPZ
2.5
8.5
12
8
10
6 3 -
80
>80
-
SPA
3.0
11
15
10
13
9 0 - ^
112
>112
-
SPB
4.0
14
19
12.5
17
140-
180
>180
SPC
5.0
19
25.5
17
19
2 2 4 -
315
-
>315
-
к
1.0
-
2 4
3.5
2.35
L
2.4
-
4.8
5.5
4.85
M
3.5
-
9 5
10
10.35
143
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Ponasim on va yarim ponasim on tasmali uzatm alarni hisoblash
tartibi
1. Tasm alarning turi va uzatilayotgan quvvat ham da yetak
lovchi shkivning aylanish soniga nisbati
6.14, 6.15, 6.16
-
rasmlardan
olinadi.
2. Uzatilayotgan m o m en tg a nisbatan yetaklovchi shkivning
diametri d, normal ponasim on tasm alar uchun 6.6-jadvaldan tanlanadi.
a)
Y arim ponasim on tasmali uzatm alarda yetaklovchi shkiv d!
ning eng kichik qiymati uzatilayotgan quvvat ham da aylanish soniga
nisbatan 6.10-jadvaldan tanlanadi.
3. Yetaklovchi shkivning diametri d 2, m m
d
,
= d x
-m(1 —f)
bunda:
e
-sirpanish koeffitsiyenti qiymati yuqorida berilgan. Aniqlangan
qivm at standart b o ‘yicha yaxlitlanib olinadi.
4. Uzatish sonining hisobiy qiymati
d
,
« = —
ii =
! • l oo% < 3%
c /,( l- f )
и
5. O 'q lararo m asofaning taxminiy qiymati
a >
0.5 5 (J,
+<;/,)
+ h
bunda: h- tasm aning balandligi
6. T asm aning hisobiy uzunligi
f
, mm:
t x = 2a + 1.57|rf, + d , ) + {d: ~ d ' ] .
4 a
A niqlangan
qiymat
standart
b o ‘yicha yaxlitlanib
olinadi.
T asm an in g standart uzunliklari:
( t .mm: 400, 450, 500, 560, 630, 710, 800, 900, 1000, 1120,
1250, 1400, 1600, 1800, 2000, 2240, 2500, 2800, 3150, 3550, 4 0 0 0 ....
7.
O 'q lararo m asofaning hisobiy qiymati
7>750>150> |