- DLldng kinh di~n cvc
4. IIu diim cola thUit bi gia nhi~t I1ln ,
- Co tM' truy~n nAng l11Qng nhi~t cho v$.t cln gia cOng mOt eAch nhanh chdng va trl,lC Wfp, khOng phBi qua khau trung gian n~n cd tM tl,l dOng hda a muc dO cao va co tM' ti~n hanh gia nhi~t a mOi trU:bng trung tlnh, chan khOng.
- Cd th~ toi M m~t chi ti~t (vo ngo~i cung, trong ru¢t mt'!!m) m¢t cAch dan gi~n nhb hi~u ung m;)t ngo~i cua dong cao U.n. V~t toi co thi1 co hlnh d~ng btU kl.
- TAng duc;1C nAng sua:t lao d~ng, giam dUQc lao d~ng m~t nh9c.
s. lrng d~ng cua thiet hi gia nhi~t thn 56 rl!t rQng rai, phd bi~n la - Nllu chay kim lo~i trong khOng khi, khl tw, chAn khOng. - Nllu chay kim lo~i trong khOng khi, khl tw, chAn khOng.
- Nung phOi di1 rim, d~p, ep. - TOi, ram, U cae chi ti@'t cO" khL - HAn.
- Gia cOng hoa nhi~t
- Slly, nung, h~n chilt di~n mOi, ban dAn (nhu : sily gd, dan gd, slly khuOn duc, sl1:, sl!y bQt, thoc gi6ng, g\iO, khit trung d6 hQp, lu:u hoa cao su, h~n dan nh\1a, ni lOng ... )
-
ViQc gia nhiQt cha:t diQn mOi (slly, nung ... ) th\1C hi~n nhb diQn tn1cmg E bi@'n thi~n
(mQt th~nh phl1n cua trU:bng di~n tU:). Thong diQn tn1bng bi@'n thi~n, cac phAn tit di(!n mOi bi phAn c1;1c. S1;1 thay ddi hU:lIng phAn c\1c thu:bng ch$.m sau theo sl,1 thay dOi hU:lIng '. cua di~n trt1bng va clin mQt na.ng IU:c;Jng. NAng IU:c;Jng n~y l~m nong di~n mOi ho;)c chilt
bAn dAn l~n. Tlin 86 gia nhi(!t di~n mOi tlIi IMHz.
6. PhAn I~ tbiM bi gia nhi~ !lin 86 cd tM thea t!n s6 lilm v;eo hay ph.m '" ,u d.ng.
a) Theo tan. ad lam vifc c6 :
- Thi@'t bi tl1n s6 cOng nghi~p lily di~n tu: lu:lIi ho;)c qua may bil!n ap.
- Thil!t bj trung tdn vlli tAn· s6 lam vi~c 500 + 10.000 Hz. Thi4!t bi n~y thU:bng dung mAy pbAt di~n quay tlin s6 cao hay dung thyristor khi cOng sullt nM v~ vita.
- Thi4!t bi cao tdn vlfi tAn s6 l~m vi~ trfln 10.000Hz, tbubng dung d~n phat ho;)c thyristor.
b) Thea phq.m vi sii. dl{.ng c6 :
+ Thi@'t bi U:n 56 d~ nllu chay kim lo~i v~ hQp kim
La cam ung lo;u n~y phAn ra 2·10(1.1 (hlnh 8-1) 18 10 co 10i tbep (10 mang) (hlnh 8-1s) vA 10 khOng co loi thep (Io n6i) (hlnh 8-1b).
OJ
Hlnb 8-1. L6 n!u chAy cam ling.
(oc r"ilf ctfm VHf
L/) nWlg dung lu_
nbc va nhi~t d~ thllp
n~ bay dung nilu chAy kim lolili mAu. 1..0 n6i cO dung lu~ng n6i cAng Illn thl tAn s6 cimg giAm (d~ nong deu
giita n6i). Dung lU:'lDg n61 cO thl1 tOi lOT, lAm
viec a t~n s6 50Hz, cOng suilt 1500kW.
'.
+ Thii!t bi nung ph6i cho rEm, d(j.p, can. PMi cang Ion thi tan s6 lam vi~c cimg nM.
+ Thi~t bt ttli bi3 m~t thubng lam vi~c d tl1n s6 cao. LOp Wi cimg mong thl. tl1n 86 lam vi~c mng cae.
+ Thii!t b~ nung, sl1y chllt di~n m6i va han d~n.
§8.2. 51! TRUYEN NANG Ll1Q"NG