IDayl=600A; αpr=αayl; Vppr=20km/s; PDpr=303,2kVt; µppr=4,28; DKpr=DKayl=1,05mm; µp ayl=4,38; Vpayl=20km/s; PDayl=307kVt.
Bundan kelib chiqadiki:
nDpr=4.28*nDayl/4.38=0,97 nDayl
MDpr=(307*nDayl *Mayl*4,38)/303,2*0,97*nDayl*4,28=1,06 MDayl
IDpr = 303,2 IDayl /307= 0,98 IDayl
To‘liq maydon PP:
nDpr=0,97*748,2=725,7
nDpr=0,97*599,8=581,8
nDpr=0,97*477,8=463,4
nDpr=0,97*382,2=370,7
nDpr=0,97*313=303,6
nDpr=0,97*270,2=262,09
nDpr=0,97*253,8=245,4
nDpr=0,97*263,8=255,8
Kuchsizlangan maydon OP1:
nDpr=0,97*1025=994,2
nDpr=0,97*815=790,5
nDpr=0,97*649=629,5
nDpr=0,97*527=511,1
nDpr=0,97*449=435,5
nDpr=0,97*415=402,5
nDpr=0,97*425=412
nDpr=0,97*479=464
Kuchsizlangan maydon OP2:
nDpr=0,97*1456=1412,3
nDpr=0,97*1132,5=1098,5
nDpr=0,97*882=855,5
nDpr=0,97*704,5=683
nDpr=0,97*600=582
nDpr=0,97*568=550
nDpr=0,97*610=591,7
nDpr=0,97*724=702
To‘liq maydon PP:
MDayl = 3,89 kN·m; bo‘lganda MDpr = 1,06·3,89 = 4,12 kN·m;
MDayl = 4,86 kN·m; bo‘lganda MDpr = 1,06·4,86 = 5,15 kN·m;
MDayl = 6,104 kN·m; bo‘lganda MDpr = 1,06·6,104 = 6,47 kN·m;
MDayl = 7,63 kN·m; bo‘lganda MDpr = 1,06·7,63 = 8,05 kN·m;
MDayl = 9,31 kN·m; bo‘lganda MDpr = 1,06·9,31 = 9,86 kN·m;
MDayl = 10,79 kN·m; bo‘lganda MDpr = 1,06·10,79 = 11,43 kN·m;
MDayl = 11,49 kN·m; bo‘lganda MDpr = 1,06·11,49 = 12,17 kN·m;
MDayl = 11,05 kN·m; bo‘lganda MDpr = 1,06·11,05 = 11,71 kN·m;
Kuchsizlangan maydon OP1:
MDayl = 2,84 kN·m; bo‘lganda MDpr = 1,06·2,84 = 3,01 kN·m;
MDayl = 3,57 kN·m; bo‘lganda MDpr = 1,06·3,57 = 3,78 kN·m;
MDayl = 4,49 kN·m; bo‘lganda MDpr = 1,06·4,49 = 4,75 kN·m;
MDayl = 5,53 kN·m; bo‘lganda MDpr = 1,06·5,53 = 5,86 kN·m;
MDayl = 6,49 kN·m; bo‘lganda MDpr = 1,06·6,49 = 6,87 kN·m;
MDayl = 7,02 kN·m; bo‘lganda MDpr = 1,06·7,02 = 7,44 kN·m;
MDayl = 6,86 kN·m; bo‘lganda MDpr = 1,06·6,86 = 7,27 kN·m;
MDayl = 6,08 kN·m; bo‘lganda MDpr = 1,06·6,08 = 6,44 kN·m;
Kuchsizlangan maydon OP2:
MDayl = 2,003 kN·m; bo‘lganda MDpr = 1,06·2,003 =2,12 kN·m;
MDayl = 2,57 kN·m; bo‘lganda MDpr = 1,06·2,57 = 2,72 kN·m;
MDayl = 3,3 kN·m; bo‘lganda MDpr = 1,06·3,3 = 3,49 kN·m;
MDayl = 4,19 kN·m; bo‘lganda MDpr = 1,06·4,19 = 4,44 kN·m;
MDayl = 4,86 kN·m; bo‘lganda MDpr = 1,06·4,86 = 5,15 kN·m;
MDayl = 5,13 kN·m; bo‘lganda MDpr = 1,06·5,13 = 5,43 kN·m;
MDayl = 4,78 kN·m; bo‘lganda MDpr = 1,06·4,78 = 5,06 kN·m;
MDayl = 4,02 kN·m; bo‘lganda MDpr = 1,06·4,02 = 4,26 kN·m;
IDayl = 600. 700. 800. 900. 1000. 1100. 1200. 1300. А
IDpr = 0,98·600 = 588 А.
IDpr = 0,98·700 = 686 А.
IDpr = 0,98·800 = 784 А.
IDpr = 0,98·900 = 882 А.
IDpr = 0,98·1000 = 980 А.
IDpr = 0,98·1100 = 1078 А.
IDpr = 0,98·1200 = 1176 А.
IDpr = 0,98·1300 = 1274 А.
Ko‘rib chiqilayotgan misol uchun loyihalashtirilayotgan teplovozning elektromexanik xarakteristikasi 2-rasmda berilgan.
2-rasm. Yuk tortuvchi elektrodvigatelning elektromexanik xarakteristikasi.
5. Yuk tortuvchi elektrodvigatelning yuk tortish xarakteristikasini hisob-kitob qilish.
Elektr yuk tortish xarakteristikasining hisob-kitobini FDpr=f(ID) va VDpr=f(ID) quyidagi tartibda navbatma-nabat amalga oshiramiz. Bunda FD va VD tegishli ravishda yuk tortish kuchi va loyihalashtirilayotgan teplovozning bitta g‘ildirak motor blokining tezligini bildiradi.
a) tuzilgan elektromexanik xarakteristikadan kelib chiqib dvigatelning barcha ish rejimlari (PP, OP1, OP2) uchun yuk tortish elektrodvigatel tokining (Id) bir necha qiymatlarini belgilaymiz va tegishli ravishda MDpr va nDpr larni aniqlaymiz;
b) MD va nD larning topilgan qiymatlari uchun yuk tortish kuchi va tezligini quyidagi formulalar yordamida hisoblab topamiz:
FD=2μpprMDprηzp /DK; (12)
V = 60π DК nDpr / 1000μрpr (13)
Hisob–kitobni tok kattaligi IDayl =600A uchun amalga oshiramiz:
FD=7,94MDpr
To‘liq maydon PP:
MD = 4.12 kN·m; FD1 = 7.94 · 4.12 = 32.7 kN;
MD = 5.15 kN·m; FD1 = 7.94 · 5.15 = 40.8 kN;
MD = 6.47 kN·m; FD1 = 7.94 · 6.47 = 51.3 kN;
MD = 8.05 kN·m; FD1 = 7.94 · 8.05 = 63.9 kN;
MD = 9.86 kN·m; FD1 = 7.94 · 9.86 = 78.2 kN;
MD = 11.43 kN·m; FD1 = 7.94 · 11.43 = 90.76 kN;
MD = 12.17 kN·m; FD1 = 7.94 · 12.17 = 96.6 kN;
MD = 11.71 kN·m; FD1 = 7.94 · 11.71 = 92.9 kN.
Kuchsizlangan maydon OP1:
MD =3.01 kN·m; FD2 = 7.94 · 3.01 = 23.8 kN;
MD =3.78 kN·m; FD2 = 7.94 · 3.78 = 30.01 kN;
MD =4.75 kN·m; FD2 = 7.94 · 4.75 = 37.7 kN;
MD =5.86 kN·m; FD2 = 7.94 · 5.86 = 46.5 kN;
MD =6.87 kN·m; FD2 = 7.94 · 6.87 = 54.5 kN;
MD =7.44 kN·m; FD2 = 7.94 · 7.44 = 59 kN;
MD =7.27 kN·m; FD2 = 7.94 · 7.27 = 57.7 kN;
MD =6.44 kN·m; FD2 = 7.94 · 6.44 = 51.1 kN.
Kuchsizlangan maydon OP2:
MD =2.12 kN·m; FD3 = 7.94 · 2.12 = 16.8 kN;
MD =2.72 kN·m; FD3 = 7.94 · 2.72 = 21.5 kN;
MD =3.49 kN·m; FD3 = 7.94 · 3.49 = 27.7 kN;
MD =4.44 kN·m; FD3 = 7.94 · 4.44 = 35.2 kN;
MD =5.15 kN·m; FD3 = 7.94 · 5.15 = 40.89 kN;
MD =5.43 kN·m; FD3 = 7.94 · 5.43 = 43.1 kN;
MD =5.06 kN·m; FD3 = 7.94 · 5.06 = 40.17 kN;
MD =4.26 kN·m; FD3 = 7.94 · 4.26 = 33.8 kN.
VDpr=0,046ndpr
To‘liq maydon PP:
nD = 725.7 min-1; VD1 = 0.046 ·725.7= 33.3 km/s;
nD = 581.8 min-1; VD1 = 0.046 ·581.8= 26.7 km/s;
nD = 463.4 min-1; VD1 = 0.046 · 463.4= 21.03 km/s;
nD = 370.7 min-1; VD1 = 0.046 · 370.7= 17.05 km/s;
nD = 303.6 min-1; VD1 = 0.046 · 303.6= 13.96 km/s;
nD = 262.09 min-1; VD1 = 0.046 ·262.09= 12.05 km/s;
nD = 245.4 min-1; VD1 = 0.046 · 245.4= 11.28 km/s;
nD = 255.8 min-1; VD1 = 0.046 · 255.8= 11.76 km/s.
Kuchsizliangan maydon OP1:
nD = 994.2 min-1; VD2 = 0.046·994.2= 45.7 km/s;
nD = 790.5 min-1; VD2 = 0.046·790.5= 36.3 km/s;
nD = 629.5 min-1; VD2 = 0.046·629.5= 28.9 km/s;
nD = 511.1 min-1; VD2 = 0.046·511.1= 23.5 km/s;
nD = 435.5 min-1; VD2 = 0.046·435.5= 20.03 km/s;
nD = 402.5 min-1; VD2 = 0.046·402.5= 18.5 km/s;
nD = 412 min-1; VD2 = 0.046·412= 18.9 km/s;
nD = 464 min-1; VD2 = 0.046·464= 21.3 km/s.
Kuchsizliangan maydon OP2:
nD = 1412.3 min-1; VD3 = 0.046·1412.3= 64.9 km/s;
nD = 1098.5 min-1; VD3 = 0.046·1098.5= 50.5 km/s;
nD = 855.5 min-1; VD3 = 0.046·855.5= 39.3 km/s;
nD = 683 min-1; VD3 = 0.046·683= 31.4 km/s;
nD = 582 min-1; VD3 = 0.046·582= 26.7 km/s;
nD = 550 min-1; VD3 = 0.046·550= 25.3 km/s;
nD = 591.7 min-1; VD3 = 0.046·591.7= 27.2 km/s;
nD = 702 min-1; VD3 = 0.046·702= 32.2 km/s.
Xuddi shunday hisob-kitob 600 A dan 1300 A gacha bo‘lgan diapozonda (oraliqda) har 100 A da amalga oshiriladi.
Yuk tortuvchi elektrodvigatelning barcha ish rejimlari uchun olingan hisob-kitoblarning natijalari 5-jadvalga jamlanadi. Hisob-kitoblar natijalari bo‘yicha 2-rasmda keltirilganidek bog‘liqlik tuzilib chiqiladi FDpr=f(ID) va VDpr=f(ID).
Yuk tortuvchi elektrodvigatelning elektr yuk tortish va elektrmexanik hisob-kitoblarini rasmiylashtirish uchun tavsiya etiladigan jadvalning tuzilishi 5-jadvalda keltirilgan.
5-jadval
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