Elektrodvigatel tanlash va yuritmaning kinematik xisobi

Energomashina yuritmasini loyihalash. Energomashina validagi quvvat P_e=6 kVt, energomashina valining aylanishlar takroriyligi n_e=50 min^-1. Yuritma xizmat muddati L_h=20000 soat.

l. Elektrodvigatel tanlash va yuritmaning kinematik xisobi

1. Elektrodvegateldan talab qilingan quvvat

P_t:= kVt

ɳ_um –yuritmaning umumiy foydali ish koeffitsienti

ɳ_tas:=0.98 ɳ_tish:=0.96 ɳ_pod:=0.99 ɳ_um:=  (ɳ_pod)^k ɳ_um =0.92

n=1 va juft podshimliklar soni k=2

P_t:= P_t:= P_t:=6.52 kVt

Jadvaldan quvvati P_dv = 7.5 kVt ; sinxron aylanishlar soni n_s=1500min^-1; sirpanish s=3% markasi 4A132S4 bo’lgan elektrodvigatel tanlaymiz.

Elektrodvigatelning nominal aylanishlar soni n_dv:= n_s (1-s)

n_dv:=1500 (1-0.03) n_dv:=1455 min^-1

2. Yuritmaning umumiy uzatishlar nisbati

i_um:= i_um:= i_um:=29.1

i_um:= i_tas i_red i_tas:=5 deb qabul qilamiz. i_red:= i_red:= i_red:=5.82

standartdan i_red:=6 deb qabul qilamiz.

Shunda i_tas:= i_tas:= i_tas:=4.8 i_tas:=4.8 deb qabul qilamiz.

i_um1:= i_red  i_tas i_um1:=6 i_um1:=28.8

3.Uzatishlar nisbatining farqi

 i:=  ;  i:=  1 3% shart bajarilmoqda

4. Yuritma vallaridagi quvvat, aylanishlar chastotasi, burchak tezlik va burovchi momentlarni aniqlash.

a. birinchi val.

P₁:=P_t P₁:=6.52 kVt n₁:=n_dv n₁=1455 min^-1

 ₁:= ;   ₁:= 152.29 sek^-1

T₁:=9550 T₁:= 9550 T₁=42.79 N

b. ikkinchi val.

P₂:= ɳ_tas∙ ɳ_pod P₂:= 6.52 0.98 0.99 P₂:=6.325 kVt

n₂:= n₂:= n₂:=303.125 min^-1

 ₂:=  ₂:=   ₂=31.7 sek^-1

T₂:=9550 T₂:= 9550 T₁=199.1 N

d. uchinchi val.

P₃:=P₂  ɳ_tish∙ ɳ_pod P₃:= 6.32 0.96 0.99 P₃:=6 kVt

n₃:= n₃:= n₃:=50.5 min^-1

 ₃:=  ₃:=   ₃=5.2 sek^-1

T₃:=9550 T₃:= 9550 T₃=1134.6 N