- Bien dBi trl so" t6c dQ ti rg ii tli b6ng hdt dgn gid tri khi vAo bdnh c6ng tic dat tdn th$t nh6 nnht.
66 giAm V@I t6c vl chuydn van t6c thhnh hp ning tai 6ng loẹ Nghia la, phAi thigt kb 6ng x l sao cho mbmen van tBc b ti&t di&n ra cha n6 kh6ng tbn tai nuạ
Hinh 111.10. Ccic ki& 6% xci
Mby bum lam vi&c v6i cbc chP d0 luu luqng khic nhau phu thugc vio khi
n a g thodt c8a Cing xH. ~ d n thgt trong 6ng xH anh h ~ h g rat 161-1 den dac tinh ciia barn. Tuy nhi&n, rgt kh6 x L dinh t6n thgt 6 bng xị
Nhieu ttjc giH d l thBng nhgt k6t lutn ih ch& do llm viec tdi uu cua born dude
x6c djnh bbi chb do lam vitc t6i uu cfia Bng xd [12,13,14].
o n g xi xodn 6c ccn dhm bbH hi&u su&t cao (kh4 nang thoit tdt) vP c6 ch& d0
l h vi@c tdi uu phti hap vbi tri sB tinh toan A, (hinh 111.11) [12,13]:
- -
Kich thudc cila budng x o h cdn tang l&n tf 1& vbi su gia tang cfia g6c bao quanh p, . Biri l E binh c6ng tAc chuygn nudc ra d&u theo d u h g trbn.
Tinh toan budng xoan the0 dMu kien ido tohn mdmen van t6c dbng chiy kh6ng đi, xugt phAt .t didu ki&n bio tohn su d6i x h g c6a dbng chly sau binh cbng tic:
Llru Iupg nude chhy qua ti& dien bgt kjl:
Sq phv thuQc c6a chi& rang budng xoln b ' v b bhn kinhR* bigu di&n qua dB
6
thi, do vay mB tich phgn x b djnh b dang s6. N&u dat - = B* ta sE c6 l ~ r u l q g qua
R"
Di&n tich ti&t di&n nim tr&n vi tri dudi g6c6 sE t$ le vdi tr/ sd g6c vP di&n tich
tigt dien ban đu F,, :
Dua theo k&t quH tinh tohn theo bing sb lieu ta d ~ duuc b hinh dang cfia
bu6ng xoan vh Bng x i n6i chung (hlnh In. 12).
. - '
-. .' - Pw-
-
- - -
3.6. Tinh luc t i c dung l&n rotor
Vdi born h6n luu mot cgp, mot cira vho vh bAnh cbng tic kikidu kin c6 thb xac
djnh lqc hudng tryc theo scr dB:
Pz = P z , + P z , + p z , +Pz4 (3.76)
6 day:
P,, , P,, - Lqc i p sugt tAc dung len bt? mat ngohi vh trong cba bhnh cbng t8c
P,, - Lqc iip sugt 3 cira vio biinh cbng tac
P,, A Lqc tic dung v&o b6 m$t c6a cac mfiu vh dtm chdng t h h