Yuritmaning umumiy fik tasmali uzatma fik

P_b=4kVt

H_b=120 min^-1

D_b=300mm

P_t= kVt

– yuritmaning umumiy FIK

tasmali uzatma FIK

=0.99³ podshipnikning FIK

=0.98 tishli g’ildiraklarning FIK

= =0.913

P_t= = = 4.38 kVt

Marka – 132M8 S%=4.1

Jadvaldan quvvat Pdv - 5.5 kVt

Sinxron aylanishlar soni 750 min^-1 , sirpanish S=4.1 markasi 132M8 bo’lgan elektrodvigatel tanlaymiz.

ELektrodvigatelning nominal aylanishlar soni ndv=ns(1-s)

ndv=750(1-0.041)=719.25 min^-1

2. Yuritmaning umumiy uzatishlar soni

i_um= = =6

i_um=i_{tas red} i_tas=3 deb qabul qilamiz.

u_red= = =2

standartdan u_red 2 deb qabul qilamiz. Shunda:

i_tas= = =3 deb qabul qilamiz.

I_um1=u_red i_tas=3 2=6

Uzatishlar nisbatining farqi

= _{=0 shart bajarilmoqda.}

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

a. birinchi val
P_b=4kVt P₁:=Pt

P₁ =4.38 kVt n₁:=ndv n1=719.25 min^-1 Ѡ₁:= Ѡ1=75.294= sek^-1

T₁:=9550 T₁:=9550 T₁=51.137 Nm

b. Ikkinchi val

P₂:=P₁ P₂=4.38 0.96 0.99=4.16 P₂=4.16 kVt

n₂:= n₂:= =239.75 n₂=239.75 min^-1

Ѡ₂ := Ѡ₂:= Ѡ₂:=25.098 sek^-1

T₂:=9550 T₂:=9550 T₂:=165.7 N m

d. Uchinchi val

P₃:=P₂ P₃:=4.16 0.99 0.98 P₃=4.03 kVt

n₃:= n₃:= n₃=119.875 min^-1

Ѡ₃ := Ѡ₃:= Ѡ₃:=12.549 sek^-1

T₃:=9550 T₃:=9550 T₃:=321.055 N m

Reduktor tishli g’ildiraklarining hisobi.

1. 
   Shesternya va tishli g’ildirak uchun material tanlab, ular uchun ruxsat etilgan kuchlanishlarni aniqlaymiz.
   
2. 
   {6} 3.3-jadvaldan o’rtacha mexanik xarakteristikali material tanlaymiz. Shesternya uchun HB1230, tishli g’ildirak uchun HB2200 bo’lgan po’lat 45 materialni tanlaymiz. Termik ishlovi-yaxshilash.
   

Ruxsat etilgan kontakt kuchlanish.

H:= ­<sub>Hlimb

1</sub> – sikllarning asosiy sonidagi kontakt mustahkamlik chegaraasi, _Hlimb:=2HB+70 KHL:=1 umrboqiylik koeffitsienti, (SH):=1.1 xavfsizlik koeffitsienti,

Shesternya uchun ( ₁):= ( ₁):= ( ₁)=481.818 MPa

Tishli g’ildirak uchun, ( ₂):= ( ₂):= ( ₂)=427.273 MPa

Shunda to’g’ri tishli g’ildiraklar uchun ruxsat etilgan xidobiy kontakt kuchlanish,

( ):= ( ₂) ( )=427.273 MPa

3. 
   Tishlarning faol sirtlari kontakt mustahkamligi shartidan o’qlararo masofani hisoblaymiz.
   

aw:=Ka(u+1) aw:=49.5 (2+1) =187.87

Ka:=49.5 u:=u_red u:=2 :=1.15 :=0.25 T₃:=321.055 N m

Standartga asosan aw ni 200 ga teng deb olamiz.

3. Normal modulni aniqlaymiz.

m_n:=(0.01+0.02) aw m_n:=(0.01+0.02) 200 m_n:=2+4 mm

Standart bo’yicha m_n:=3 mm deb qabul qilamiz.

4. 
   Shesternya va tishli g’ildirak tishlari sonini aniqlaymiz.
   

z1:=2 z1:=2 z1=44.4 z1:=44 deb qabul qilamiz.

Shunda, z2:=z1 u z2:=44.4 2=88.8 z2=89 deb qabul qilamiz.

Shesternya va tishli g’ildiraklarning asosiy o’lchamlari:

Bo’luvchi diametrlari,

d1:=m_n d1=3 d1=132 mm, d2:=m_n z2 d2:=3 d2=267 mm.

Tekshiruv: aw:= aw:= aw=199.5 mm

Tishlar cho’qqisining diametrlari,
da1:=d1+2 m_n da1:=132+2 3 da1=138 mm

da2:=d2+2 m_n da2:=267+6 da2=273 mm

tishli g’ildirak eni,

b2:= aw b2:=0.25 200 b2=50 mm

shesternyaning eni,

b1:=b2+5 b1=55 mm

Shesternya eni koeffitsientini diametr bo’yicha aniqlaymiz,

:= =0.416

Tishli g’ildiraklarning aylana tezligi,

:= Ѡ₂ :=25.098 :=1.656 m/s

:=1.65 m/s da to’g’ri tishli g’ildiraklar aniqlik darajasini 8 deb qabul qilamiz.

6.Yuklanish koeffitsienti,

KH:=KHβ KHα KHυ

KHα:=1 yuklamaning tishlararo taqsimlanishini hisobga oluvchi koeffitsient,

KHβ:=1.01 tishli g’ildirak gardishi bo’yicha yuklamaning notekis taqsimlanishini hisobga oluvchi koeffitsient,

KHυ:=1.05 dinamik koeffitsient, deb qabul qilamiz.

KH:=1.01 KH=1.061

7.Kontakt kuchlanishni quyidagi formula bo’yicha tekshiramiz:

σH:= σH:= σH:=332.23

σH<( σH₂) 332.23<427.273 MPa

8. Tishli ilashmaga ta’sir qiluvchi kuchlar:

Aylana kuch,

F_t:= F_t:= F_t=2510.6 N

Radial kuch,

α:=20^o tgα:=0.3640 Fr:=Ft tgα F_r=913,8584 N

9. Tishlarni egilishdagi kuchlanish bo’yicha mustahkamlikka tekshiramiz:

σF:= <(σF)

KF:=KF yuklanish koeffitsienti , KF 1.04 tish uzunligi bo’yicha yuklamaning notekis taqsimlanishini hisobga oluvchi koeffitsient, :=1.25 yuklamaning dinamik ta’sirini hisobga oluvchi koeffitsient.

Shunda, KF:=1.04 1.25 KF=1.3

YF – tish shaklini hisobga oluvchi koeffitsient,

Shesternyaniki, zυ1:=z1 zυ1=44 YF1=3.86

Tishli g’ildirakniki, zυ2:=z2 zυ2=89 YF2=3.61

Ruxsat etilgsan kuchlanish, σF:= (SF):=1.75 - xafvsizlik koeffitsienti, σFlimb – sikllarning asosiy soniga mos keluvchi mustahkamlik chegarasi, shesternya uchun,

σFlimb:=1.8 HB1 σ1Flimb:=1.8 230 σ1Flimb=414 MPa,

tishli g’ildirak uchun,

σ2Flimb:=1.8HB2 σ2Flimb=1.8 200 σ2Flimb=360 MPa.

SHunda ruxsat etilgan kuchlanish quyidagicha:

Shesternya uchun,

(σF1):= (σF1)=236.571 MPa

Tishli g’ildiraklar uchun,

(σF2):= (σF2)=205.714 MPa.

Quyidagi munosabatni ( , ya’ni shesternya va tishli g’ildirak uchun ruxsat etilgan kuchlanishni ular tishlarining shakliga nisbatini hisoblaymiz:

Shesternya uchun, ( )=60.659 MPa,

Tishli g’ildirak uchun, ( .

Tishli g’ildirak tishining mustahkamligini tekshiramiz:

σF2:= ≤( σF2)

σF2:= σF2=78.55 MPa

σF2≤(σF≤2)

Mustahkamlik sharti bajarilmoqda.