IDayl=600A; αpr=αayl; Vppr=20km/s; PDpr=203.82kVt; µppr=4,28; DKpr=DKayl=1,05mm; µp ayl=4,38; Vpayl=20km/s; PDayl=207kVt.
Bundan kelib chiqadiki:
nDpr=20*4.38*1.05* nDayl/20*4.35*1.05=1.006 nDayl
MDpr=207 nDayl Mayl/203.82*1.005*nDayl=1,02 MDayl
IDpr = 203,82 IDayl /207= 0,98 IDayl
Toliq maydon PP:
MDayl = 2,47kN·m; bolganda MDpr = 1,02·2,47 = 2,51 kN·m;
MDayl = 3,11 kN·m; bolganda MDpr = 1,02·3,11 = 3,17 kN·m;
MDayl = 3,96 kN·m; bolganda MDpr = 1,02·3,96 = 4,03 kN·m;
MDayl = 5,1 kN·m; bolganda MDpr = 1,02·5,1 = 5,2 kN·m;
MDayl = 6,55 kN·m; bolganda MDpr = 1,02·6,55 = 6,68 kN·m;
MDayl = 8,16 kN·m; bolganda MDpr = 1,02·8,16 = 8,32 kN·m;
MDayl = 9,47 kN·m; bolganda MDpr = 1,02·9,74 = 9,65 kN·m;
MDayl = 9,82 kN·m; bolganda MDpr = 1,02·9,82 = 10,01 kN·m;
Kuchsizlangan maydon OP1:
MDayl = 1,68 kN·m; bolganda MDpr = 1,02·1,68 = 1,71 kN·m;
MDayl = 2,04 kN·m; bolganda MDpr = 1,02·2,04 = 2,08 kN·m;
MDayl = 2,49 kN·m; bolganda MDpr = 1,02·2,49 = 2,53 kN·m;
MDayl = 3,06 kN·m; bolganda MDpr = 1,02·3,06 = 3,12 kN·m;
MDayl = 3,72 kN·m; bolganda MDpr = 1,02·3,72 = 3,79 kN·m;
MDayl = 4,42 kN·m; bolganda MDpr = 1,02·4,42 = 4,5 kN·m;
MDayl = 5,02 kN·m; bolganda MDpr = 1,02·5,02 = 5,12 kN·m;
MDayl = 5,33 kN·m; bolganda MDpr = 1,02·5,33 = 5,43 kN·m;
Kuchsizlangan maydon OP2:
MDayl = 1,03kN·m; bolganda MDpr = 1,02·1,03 =1,05 kN·m;
MDayl = 1,26 kN·m; bolganda MDpr = 1,02·1,26 = 1,28 kN·m;
MDayl = 1,55 kN·m; bolganda MDpr = 1,02·1,55 = 1,58 kN·m;
MDayl = 1,89 kN·m; bolganda MDpr = 1,02·1,89 = 1,92 kN·m;
MDayl = 2,25 kN·m; bolganda MDpr = 1,02·2,25 = 2,29 kN·m;
MDayl = 2,55 kN·m; bolganda MDpr = 1,02·2,55 = 2,6 kN·m;
MDayl = 2,68 kN·m; bolganda MDpr = 1,02·2,68 = 2,73 kN·m;
MDayl = 2,59 kN·m; bolganda MDpr = 1,02·2,59 = 2,64 kN·m;
IDayl = 600 А; IDpr = 0,98·600 = 588 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 gildirak 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:
Toliq maydon PP:
MD = 2,51kN·m; FD1 = 2·4,35·2,51·0,975 / 1,05 = 20,25 kN;
MD = 3,17 kN·m; FD1 = 2·4,35·3,17·0,975 / 1,05 = 25,58 kN;
MD = 4,03 kN·m; FD1 = 2·4,35·4,03·0,975 / 1,05 = 32,5 kN;
MD = 5,2 kN·m; FD1 = 2·4,35·5,2·0,975 / 1,05 = 41,9 kN;
MD = 6,68 kN·m; FD1 = 2·4,35·6,68·0,975 / 1,05 = 53,9 kN;
MD = 8,32 kN·m; FD1 = 2·4,35·8,32·0,975 / 1,05 = 67,14 kN;
MD = 9,65 kN·m; FD1 = 2·4,35·9,65·0,975 / 1,05 = 77,87 kN;
MD = 10,01 kN·m; FD1 = 2·4,35·10,01·0,975 / 1,05 = 80,78 kN.
Kuchsizlangan maydon OP1:
MD =1,71 kN·m; FD2 = 2·4,35·1,71·0,975 / 1,05 = 13,79 kN;
MD =2,08 kN·m; FD2 = 2·4,35·2,08·0,975 / 1,05 = 16,78 kN;
MD =2,53 kN·m; FD2 = 2·4,35·2,53·0,975 / 1,05 = 20,41 kN;
MD =3,12 kN·m; FD2 = 2·4,35·3,12·0,975 / 1,05 = 25,17 kN;
MD =3,79 kN·m; FD2 = 2·4,35·3,79·0,975 / 1,05 = 30,58 kN;
MD =4,5 kN·m; FD2 = 2·4,35·4,5·0,975 / 1,05 = 36,3 kN;
MD =5,12 kN·m; FD2 = 2·4,35·5,12·0,975 / 1,05 = 41,31 kN;
MD =5,43 kN·m; FD2 = 2·4,35·5,43·0,975 / 1,05 = 43,8 kN.
Kuchsizlangan maydon OP2:
MD =1,05 kN·m; FD3 = 2·4,35·1,05·0,975 / 1,05 = 8,47 kN;
MD =1,28 kN·m; FD3 = 2·4,35·1,28·0,975 / 1,05 = 10,32 kN;
MD =1,58 kN·m; FD3 = 2·4,35·1,58·0,975 / 1,05 = 12,75 kN;
MD =1,92 kN·m; FD3 = 2·4,35·1,92·0,975 / 1,05 = 15,5 kN;
MD =2,29 kN·m; FD3 = 2·4,35·2,29·0,975 / 1,05 = 18,48 kN;
MD =2,6 kN·m; FD3 = 2·4,35·2,6·0,975 / 1,05 = 20,9 kN;
MD =2,73 kN·m; FD3 = 2·4,35·2,73·0,975 / 1,05 = 22,03 kN;
MD =2,62 kN·m; FD3 = 2·4,35·2,62·0,975 / 1,05 = 21,14 kN.
Toliq maydon PP:
nD = 794,4 min-1; VD1 = 60·3,14·1,05·794,4 / 1000·4,35= 36,12 km/s;
nD = 632,1 min-1; VD1 = 60·3,14·1,05·632,1 / 1000·4,35= 28,74 km/s;
nD = 495,6 min-1; VD1 = 60·3,14·1,05·495,6 / 1000·4,35= 22,53 km/s;
nD = 384,9 min-1; VD1 = 60·3,14·1,05·384,9 / 1000·4,35= 17,5 km/s;
nD = 300 min-1; VD1 = 60·3,14·1,05·300/ 1000·4,35= 13,6 km/s;
nD = 240,9 min-1; VD1 = 60·3,14·1,05·240,9 / 1000·4,35= 10,9 km/s;
nD = 207,6 min-1; VD1 = 60·3,14·1,05·207,6 / 1000·4,35= 9,43 km/s;
nD = 200,1 min-1; VD1 = 60·3,14·1,05·200,1 / 1000·4,35= 9,09 km/s.
Kuchsizliangan maydon OP1:
nD = 1168,8 min-1; VD2 = 60·3,14·1,05·1168,8/1000·4,35= 53,14 km/s;
nD = 962,7 min-1; VD2 = 60·3,14·1,05·962,7/1000·4,35= 43,77 km/s;
nD = 787,2 min-1; VD2 = 60·3,14·1,05·787,2/1000·4,35= 35,79 km/s;
nD = 642,3 min-1; VD2 = 60·3,14·1,05·642,3/1000·4,35= 29,2 km/s;
nD = 528 min-1; VD2 = 60·3,14·1,05·528/1000·4,35= 24 km/s;
nD = 444,3 min-1; VD2 = 60·3,14·1,05·444,3/1000·4,35= 20,2 km/s;
nD = 391,2 min-1; VD2 = 60·3,14·1,05·391,2/1000·4,35= 17,78 km/s;
nD = 368,7 min-1; VD2 = 60·3,14·1,05·368,7/1000·4,35= 16,76 km/s.
Kuchsizliangan maydon OP2:
nD = 1908,0 min-1; VD3 = 60·3,14·1,25·1908,0 / 1000·4,35= 86,75 km/s;
nD = 1554,5 min-1; VD3 = 60·3,14·1,25·1554,5 / 1000·4,35= 70,68 km/s;
nD = 1264 min-1; VD3 = 60·3,14·1,25·1264 / 1000·4,35= 57,47 km/s;
nD = 1036,5 min-1; VD3 = 60·3,14·1,25·1036,5 / 1000·4,35= 47,12 km/s;
nD = 872,0 min-1; VD3 = 60·3,14·1,25·872,0 / 1000·4,35= 39,6 km/s;
nD = 770,5 min-1; VD3 = 60·3,14·1,25·770,5 / 1000·4,35= 35 km/s;
nD = 732 min-1; VD3 = 60·3,14·1,25·732 / 1000·4,35= 33,28 km/s;
nD = 756,5 min-1; VD3 = 60·3,14·1,25·756,5 / 1000·4,35= 34,4 km/s.
Xuddi shunday hisob-kitob 600 A dan 1300 A gacha bolgan 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 boyicha 2-rasmda keltirilganidek bogliqlik 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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