Giáo trình -Trang bị điện - điện tử máy công nghiệp dùng chung - chương 3 ppt

Chrrong 3 . .' TRANG B! DII;N - DII;N TU THANG MAy vA MAy NANG §3.1. KHAI NI~M CHUNG Thang may (may nAng) 18. thi~t hi vl\ln tAi dung d~ cha hang va ngubi thea phl1dng thing dung. Nhting IOlili thang may hi~n d~i cd ket cAU cd kht phuc t!ilP, M truy~n d/,'lng, M th6ng kh6ng chI! phuc t!;lP - nh~m '. nang caa na.ng sullt, vl\ln hanh tin cl\ly, an toano Tilt ca cae thi~t hi di{}n dUQc M.p ~t trong bu6ng thang va bu6ng may. Bu6ng may thubng b6 trl " bing tr~n cung cua giifng thang may. Kift ellu, sa do b6 trl thiift bi cua thang may gWi thi~u tr~n binh 3-1. H6 gil!ng cua thang may 11 lit khoAng khOng gian tu m(lt bAng sAn bing 1 cho den day gi«ng. N«u h6 ¢ng cO dQ sAu hdn 2m thl phAi lam thAm cua ra vao. D~ nAng - h~ hu6ng ~hang, ngubi ta dung d/)ng Cd 6. DOng Cd 6 dUQc n6i tn,iC ti~p viJi CO diu nAng ho~ qua hQp giAm tde. N«u n6i tn,iC ti«p, hu6ng thang dUQc tree l~n pUli qutln c~p. N~u n6i gi~n ti«p thl giua pUli qutln cap vA dOng co cO lAp hQp giAm t6c 5 vl'li ti 86 tnly~n i == 18 + 120. Khung cUa bu6ng thang 3 dl1Qc tree l~n puB qutln c~p bAng cap kim le~i 4 (thl1ang dung 1 d~n 4 sQi cap). Bu6ng thang luOn luOn dUQc giu theo phuong thAng dang nhb cO gia tree 7 va nhung con trl1Qt dAn hl1l'1ng (con truc;Jt la lo~i puli truc;Jt cd bQc cao Bll b~n ngeai). Bu6ng thang vA d6i trQng di chuy~n dQc 28 -144 11 Hlnh 3-1. Ka ~ vB b6 tri thj~t bi cUa thang mfIy. '. thea ehieu eaa eua thanh gi~ng thea cae thanh dAn httong 9. Bu6ng thang co trang b~ bl) phanh hia hi~m (phanh du). Phanh baa hi~m giu bu6ng thang t~i eM khi dut cap, mfit di~n va khi t6c d¢ di chuygn Vligt qua (20+40)% t6e dl) dtnh mac. Phanh haa hil!m tbttbng dugc eM' t.f.ta thea 3 kil!u : phanh baa hiem kieu n@m, phanh baa hiem kigu l~ch tdm vA phanh baa hiem kigu kim. Trang cae lal;l.i phanh tr€m, phanh baa hi~m kieu kim dugc su dl,lng r¢ng "tAi helD, no dam baa eha bu6ng thang dung @m han. K~t eliu clla phanh baa hiem kieu kim dugc hil!u di~n tren Mnh 3-2. Phanh baa higm thuang dUQe lAp phia duai bu6ng thang, g<;>ng kim 2 trugt thea thanh dAn huang 1 khi t6c dQ ella. budng thang blnh thu:ang. N~m giua hai canh tay don clla kim co n@m 5 gAn voi M truy~n dOng banh vlt - tr1,lc vlt 4. H~ truyt!n d¢ng tr\lc vit co hai la~i ren : ren phai va ren trai. Cung voi k~t eliu ella phanh bAa hiem, buang thang cO trang bt tMm ca cau h~n che t6e de;; kil!u ly tAm. Khi bu6ng thang di chuygn se lam eha ea el1u h(ln ch~ t6c dl) kieu ly tam quay. Khi t6e de;; di ehuyen clla bu6ng thang tang, co eliu dai truy~n 3 se lam cha tang 4 quay va klm 5 se ep ch~t bu6ng thang vaa thanh dAn huang va h~n che' tde d¢ ella bu6ng thang. , Hlob J-l. Phanh bao hi~m kieu kim. 1- Thanh dAn hu6ng; 2- G(J1IgkbntnzVt; 3- Dai truyfn;" - He tMR8d~8bdnh vit- trliC vit; 5 - Ntm. §3.2. PHAN LOJ),I vA eAe THONG SO Ki THU;'T eo BAN eUA THANG MAy Tuy thu¢e V3a ehuc n8.11&', thang may co thg phAn laf,li thea cae nh6m sau 1 - Thang may eha DgI1bi trong cae nhA cae, ~ng. 2 - Thang may dung trang cae b~nh vi~n. 3 - Thang may cM hang co ngttbi di~u khien. 4 - Thang may dung trang nha An va thu vi~n. 29 '. PhAn lOI;li thea tl'Qng tai : 1 - Thang may la~ nM Q < 160kG. 2 - Thang may trung blnh Q = 500 +- 2000 kG. 3 - Thang ma.y ial:li IOn Q > 2000kG. PhAn lalili thea t6c d¢ di chuy~n : 1 - Thang may chlilY ch$.m v = 0,5mJs. 2 - Thang may t6c dti trung blnh v = 0,75 + 1,5m/s. 3 - Thang may caa t6c v = 2,5 + 5mJs. §3.3. TINH CHQN CCNG SUAT DONG CO TRUYEN DONG THANG MAy D~ dnh chc;m d11QC cOng su!t dQng co truy~n d¢ng tbang may clin cO cac di~u ki(!n vA tham s6 sau : - So d6 dOng hQc cua thang may - T6c d¢ vA gia t6c Ion nhl'lt cha phep - TrQng tAi - Tr~mg 111c;fng pu6ng thang. COng su!t tlnh cua dOng 00 khi nAng tai khOng dung d6i tI"Qng d11QC dnh thea cOng thuc sau : 30 Trang d6 Gbl - kh6i hlQng bu6ng thang [kg] G - kh6i hlQng bAng, [kg] v - t6c dQ nAng, [mls) g - gia t6c tl'Qng tr11bng, [m/s2] rz - hiQ:u suAt cUa CO" Cl1u nAng (0,5 + 0,8). (3-1) Khi c6 d6i trQng, cOng su!t dnh cUa dOng Cd 11k nAng tl\i dl1QC dnh thea bi~u thuc sau : Pen = {[G + GbtJi - G dt .rz}vkg.1O-3, [kW]. (3-2) VA khi hl;l tAi (3-3) Trang d6 : Pen - cOng su!t dnh cua d¢ng 00 khi nAng co dung d6i trQng P eh - cOng sul'lt dnh cua dQng 00 khi hl;l co dung d6i trQng G dt - kh6i 111Qng cua d6i trQng, [kg] k - ~ Oil tlnh Mn rna sat gifta thanh WIn bUbng va d& tn,mg (k = 1,15 + 1,3). Kh6i 111c;mg cua d6i trQng dl1QC dnh thea bi~u thuc sau dAy: G dt = G hl + aG, [kg]. (3-4) Trang do : a - M s6 cAn b!\ng (a = 0,3 + 0,6). ; '. Phlin 16:n cac thang mAy eM khach chI v$,n hAnh dl1y titi trvng nhung gtb can di~m, thOi gian -dm l~i luOn lam vi~c non tAi ; cho n€m d6i vdi thang may cha kMch n~n ChQD M a6 a ::= 0,35 -I- 0,4. D6i v{Ji thang may chc'J hllng, khi nling thllbng IS. diiy tl).i vii khi hl;l thu:bng Iii. khOng tAi, nlm chc;m a = 0,5. D\ia t~n hai bi~u thuc (3-2) va. (3-3) c6 the xAy dl,1'ng dllt;JC biell dfi ph\! tAi vA chc;m ad bl) cOng sullt cua dOng co thea s6 tay tra CUll. Mudn xAy d\ing bi~u d6 ph1,l tAi chtnh xac, din phAi dnh d~n thbi gian rna may, thbi gian hl1m, thai gian dong, rna cua va 86 IAn dling cua bu6ng thang khi chuyen dl;lng. ThOng s6 tllCfng d6i M tfnh toan cae thai gian trlln dllQ'C dua ra trong bAng 3-1. Thbi gian ra, vAo bu6ng thang dllQC dnh gl1n dung ls/l ngubL 86 lAn dung (dnh thea XBC su.!It) eua bu6ng thang co the dm thea cae dubng cong tr€!n hlnh 3-3. T6e dO di ehuyen (m/s) 0,5 0,75 1,0 1,5 2,5 3,5 18 16 14 12 10 8 6 4 2 V V Bimg 3-1 Thbi gian rna may T6ng thbi gian cOn l~i (8) vii hl1rn may v(1i khoang Bu6ng thang Bu6ng thang Bu6ng thang each giua ella Ung (s) cd ci'ta r¢ng co etta r¢ng e6 ella rOng 3,6 met 7,2 met duili BOOmm dulli BOOrnm dulli 1000mrn (md bAng tay) (meJ t~ dQng) (rna tV' dOng) , 1,6 1,6 12,0 7,0 - 1,6 1,6 12,0 7,0 - 1,8 1,8 13,0 7,0 6,3 1,8 1,8 - 7,2 6,3 2,8 2,0 - - 6,5 3,2 2,5 - - 7,0 E 21n uai /' E-1 ngui /" .<,. r" E 13ng yo; f;:: / E lOng 0/ : E 5nau '; 5 10 14 18 22 26 30 34 38 42 46 50 m, Hlnh 3-3. Dl1dng cong de x.IIc dinh ~ illn dung (thoo xAc suJll) Clla bu6ng thang. md - sO lIin dung; rn,. - s6 tA:ng ; E - s6 ngtlOi lrung bu6ng thang. 31 '. Phuong phap dnh ch!;m cOng Built d¢ng CO truy~n d¢ng thang may til!n hanh theo cac bulic sau dAy : 1. nnh IIjC kea d~t len puli cap kea bu6ng thang a tAng dulii dmg va cac IAn dung ti@'p thea : Trang do : kl - s6 llin dung cua bu6ng thang. 6.G 1 - thay d6i (giam) kh6i h1Qng tM sau m6i hin dung. g - gia t6c tr(;mg truong, [m/s2]. 2. Tlnh m6men tuong ung vai lljc kea. M F.R i.I[ , [Nm] nl!u F > 0 va : F.R . M ~ -,-12 , [Nm], n@'uF<O. Trang dci R - ban kfnh cua puli, [m]. i - ty 96 truy~n cua cd ~u. '1 - hi~u sucH cua co cAu. (3-5) (3-6) 3. Tfnh t6ng thbi gian hanh trinh nAng va h~ cua bu6ng thang baa g6m : thai gian bu6ng thang di chuyl!n vai t6c dQ 6n dinh, thbi gian rna may va hlim may va t6ng thai gian ron l~i (thai gian dong rna cua bu6ng thang, thbi gian ra vao buang thang cua hanh khach) thea bang 3-1. 4. Dy-a tr~n k@'t qua cua cac buac tlnb tmin tr~n, tinh mO men dAng trj va tinh chon cOng sullt de)ng cd. 5. XAy dljng bi~u do ph1,l ali chlnh xae cua de)ng cd truyl'!n. de)ng co tlnh den cae qua trinh qua de) va ti@'n hanh ki@'m nghi~m cOng sullt dQng cd dli ch<;>n thea di~u ki~n phat nong, qua till. §3.4. ANH HuUNG ellA Toe DQ, GIA Toe VA DQ D~T (DAO HAM B~e NHAT ellA GIA TOC) DOl veil He TRUYEN oQNG THANG MAy M9t trang nhung y~u cAu Cd ban d6i vOi M truy~n d¢ng thang may la ph!ll dam baa cha bu6ng thang chuyEfn d¢ng ~m. Bu6ng thang chuyEfn dOng Elm hay khOng, ph\! thu¢C vao gia t6c khi md may va khi hlim may. Cac tham 56 chlnh d~c t:rung cha ch~ dO lam vi~c cua thang may Ia : t6c d¢ di chuyEfn v[m/s], gia t6c a[m/s 2 ] va de) d~t p[m/s 3 ). T6c de) di chuygn cua bu6ng thang quy~t dinh nling Built cua thang may, cd y nghta quan tI'Qng, nh:H la d6i vai cac nha cao bing. D6i v6"i cac nha ch9c trbi, t6i uu nMit la dung thang may caa t6c (v = 3,5m/s), giam thbi gian qua de) va Wc d¢ di chuygn trung binh cua bu6ng thang d{lt gAn bAng t6c d() dtnh muc. Nhung vi~c tling t6e de) l{li dAn d~n tling gia thlinh eua thang may. Neu tang 32 '. t6c d¢ cua thang may v = 0,75m/s Hln v = 3,5m/s, gia thanh tllng Illn 4 + 5 ll'in. Bai v1).y, tuy thea d¢ caa cua nha rna chQn thang may co Mc d¢ phil hc;Jp viii t6c d¢ t6i uu. T6c d¢ di chuy4!n trung blnh cua thang may cd th4! tAng bAng clch giAm thOi gian rna may va ham may, cd nghla IA tAng gia t6c. Nhung khi gia t6c IlIn sll gAy ra cAm giac khd chju cha hAnh khach (nhu chdng m~t, SQ hAi, nghfilt tho v.v ). Boi v$.y, gia t6c t6i uu la a :!iO 2m/s2. Gia t6c t6i 11u dAm bAa na.ng suAt caa, khOng gAy ra cam giac kh6 ch~u cha hanh khach, d11QC d11a ra trong bAng 3-2. Tham s6 Tt'lc d¢ thang may (m/s) Gia t6c cl,1c d~ (m/s 2 ) Gia Me dnh toan kung binh (m/s 2 ) I '-' ,0 !-_I- 'I I , I , Xaay chi~u 0,5 0,75 1 1 0,5 0,5 s H~ tTUy~n d¢ng 1 1,5 0,8 M¢t chi~u 1,5 1,5 1 p r- , I 2,5 2 1 Bang 3-2 l' n , I 3,5 2 1,5 Q~I~~~ ______ ~~~~=+~t_ J. ~Bf)i)l ·i. , , L.,J P Hloh 3-4. Cae dlldng cong bit!u dil'n sl,l ph1,l tln.tOe ella quAng duong S, Ide d¢ v, gia 16e a va dO del P thea thOi gian. 33 M~t dl.li hrc;mg nua quyl'lt d~nh sl,t di chuy€n €lm cua bu6ng thang la t6c dQ tAng cua gia Mc khi mc'.! may va t6c d9 giam cua gia t6c khi ha.m may. Noi mtit eAch kM.c, do Iii da d 2 v d¢ ~t (~l.lo ham b~c nhc'(t cua gia tOe f = dt hoi;1c ~ h8rn. ~ hai ella. t.6c dti f = dt 2 ). ,Khi gia t6c a ~ 2m/s2 thi d¢ d~t kht"lng dUQc qua 20m/s 3 . Bh~u d6 lam vi~c t6i uu cUa thang may USc d9 trung binh va t6c dO cao bi€u di€n tr€ln hlnh 3-4. Bieu d6 nay co th~ chia ra lam 5 giai dOl.ln thea dnh chllt thay d6i toc dti cua buang thang : ma may, che dti On dinh, M.m xu6ng t6c d() thllp, bu6ng thang den tAng va ham dung. Bi~u d6 t6i uu hlnh 3-4 se dl;it dUQc n~u dung M truy~n d()ng mtit chi~u (F-D). Neu dung M truyen d()ng xoay chieu vlii d(lng co kht"lng d6ng b(l hai cap t6c dQ, bi~u d6 chi dl.lt gan giOng bi{!u d6 t6i uu. Doi voi thang may chl;iy ch~m, bi~u d6 chi c6 ba giai do!pl : mo may, chI'! dQ 6n dmh va ham dung. §3.5. DlrnG CHINH xAc BUONG THANG Bu6ng thang cUa thang may cAn phai dting chinh xac so voi m~t bang cua Uing cAn dung sau khi iln nut dung. Neu buang thang dung khong chinh xac se gay ra cac hi~n tUQng sau : - D6i v6i thang may cha kMch, lam cho hanh khAch ra, vao kho khAn, tAng- thai gian re, vilo cua hanh khach, dAn d~n giam nAng suilt. - D6i v{Ji thang may chb hang, gAy kho khAn trong vi~ xep va Mc da hang. Trang mtit s6 trubng hQP c6 th~ kht"lng tht,!c hi~n dUQc vi~ x~ vA Mc da hang. D~ kh~c phl,lc h(,-u qua do, co th€ c'(n nhAp nut ba:m d~ df).t dUQc dti chinh xac khi dung, nhung se dAn Mn cae vc'(n de kh6ng mong mu6n sau - Hong thi(~"t bi di~u khi~n - GAy t6n th!t nling lUQng - GAy h9ng hOc clk thi~t hi Cd khi - TAng thbi gian tu luc ham d~n dung. D~ dung chinh xlie bu6ng thang, din dnh den m(jt ntra hi/[!u 56 cua hai quang duang truQt khi phanh buang thang dc'(y Uti va phanh bu6ng thang kht"lng tAi thea cung mQt huang di chuy~n. Cac yeu to anh huang d~n dung chinh xac bu6ng thang bao gam : momen cua co cllu phanh, mt"lmen quan dnh cua buang thang, t6c d¢ khi b~t dAu ham va mOt s6 yeu to phl,l khac. Qua trlnh ham bu6ng thang xity ra nhu sau : khi bu6ng thang di dlin gan san tang, dIng tAc chuy€n d6i tang dip l~nh Mn h¢ th6ng dieu khi~n d(lng cd d~ dung buang 34 3_T009T_ -" '. thang. Trang quAng thbi ,gian 6.t (thbi man tac dQng cua thi~t bi di~u khi~n), bu6ng thang di dUQc quAng dubng IA S' = voAt , [m] (3-7) Trang d6 : v 0 - T6c dQ hic bAt dllu ha.m, [m/s]. Khi co c!1'u phanh mc dQng IA qua trlnh hAm bu6ng thang. Trong thbi gian nAy, bu6ng thang di dUQc m¢t quang duong S". mv' S" = 0, [m] 2(Fph ± FJ (3-8) Trang do : m - kh6i IUQng cAc phl1n chuygn dQng cua bu6ng thang, [kg] F ph - h,1c phanh, [Nl Fe - h,1c can dnh, [N] Dau (+) ho~c tru (-) trong bieu thuc (3-8) phl:l thuQc va~ chh~u tac dvng clla h,tc Fe: Khi bu6ng thang di l@n (+) va khi bu6ng thang di xu6ng (-). S" cung cd the vi~t duO'i df).ng sau : S" = (3-9) Trang do : J - mOmen quan dnh M quy d6i v~ chuy~n d¢ng Clla bu6ng thang, [kgm2] MPh - momen rna sat, [N] Me - mOmen can tlnh, [N] Wo - Mc dQ quay cua d¢ng co Iuc bAt dl1u phanh, [rad/s] D - dubng klnh puli keo cap, [m] - ti os6 truy~n. Quling dubng bu6ng thang di dUQc tit khi cOng tAc chuygn d6i tl1ng cho l~nh dung dl!n khi bu6ng thang dung tf).,i sAn tllng IA : S = S' + S" = Vo At + 2iCMph ± MJ (3-10) COng tAc chuyfn d6i tllng dQ.t each sAn tbg m(it khoAng cach nAo dd lAm sao cho bu6ng thang nAm if gilla hi~u hal. quAng dU'bng truo:t khi phanh d4y tAi vA khOng taL Sai s6 16n nMt (d(i di:lng khOng .chinh xac IOn nhllt) IA s - S' , I "S = 2 (3-11) Trong d6 : Sl - q uAng dubng truc;lt riM nhllt cua bu6ng thang khi phanh S2 - quAng dubng truc;lt Ibn nh4t cua hu6ng thang khi phanh (hlnh 3-5), Bang 3 - 3 dUB ra cac tham 86 cua cac M truy~n d(ing voi d¢ khOng chinh xac khi dung As. 35 Bang 3 - 3 Ph/ilm T6c dO Gia D¢ khOng H~ truyen dOng di~n vi di~u di . t6e chinh xBe khi chlnh chuy~n (m/s2) dttng (mm) Me dQ [m/s] DOng co KDB 1"0 to 16ng soc 1 ctlp t6c dtj 1 , 1 0,8 1,5 ± 120 + 150 DOng 00 KDB rO to 16ng soc hai cllp tile dO 1 , 4 0,5 1,5 ± 10 + 15 DOng 00 KDB re, to 16ng s6c hai cllp tile dl) 1 , 4 1 1,5 ± 25 + 35 H~ may phat - dl)ng co (F - D) 1 , 30 2,0 2,0 ± 10 + 15 H(! may phat - d¢ng 00 cO khuyl1ch d~ trung gian. 1 , 100 2,5 2 ± 5 + 10 '. - r-r Mticdat cam bien dung ~ I-linh 3-5. Dung chinh xflc w6ng thang. 36 '. §3.6. cAe H~ TRUYEN DONG DI~N DUNG TRONG THANG MAy VA MAy NANG Khi thi~t k~ M trang hi di(m - di~n tli: cho thang may, vi~c 11,18. ch9n mOt M truY~fI d(>ng, chQn lo(ii dOng co phAi d1,1a tr~n cae y~u diu sao - DC) chfnh xac khi dung - Teie dO di chuy~n bu6ng thang - Gia t6c IOn nhl1t cho phep - Ph~m vi di~u chinh t6c de H~ truy~n dOng dil)!n xoay chi~u dung d¢ng co khOng dOng bl) rotor lOng soc va rotor day que'in du'c;1c dung kha. pM bi~n trong trang hi di~n - dil~n to thang may va may nAng. H~ truy~n d(>ng dOng co !thong d6ng bl) rotor 16ng soc thubng dung cho thang may cho hang t6c dO ch$rn. H~ truy~n dOng d/)ng co khOng d6ng bl) rotor dAy quan thuang dung cho cae may nAng cO trQng tM lCm (ct.')ng sulIt d/)ng cO truy~n dOng tdi 200kW) nham hl;ln ch€ dbng khai d¢ng d~ kh6ng 111m anh huang d€n ngu6n di~n cung c-a:p. H~ truy~n d¢ng xaay chi~u dung d/)ng co kh6ng d6ng ~ nhi~u dIp t6c d¢ thubng dung cho cae thang may ebb khach t6c dl) trung blnh. H~ truy~n dl)ng mQt chi~u may phat - d(>ng ~o cO khu~h d~i trung gian thubng dung cho cae thang may cao too. H~ nlly dam baa bi~u d6 chuy~n dC)ng h~p Iy, n§.ng cao d¢ chtnh xac khi dung t6"i ± (5 + 10) mm. Nhu:~c di~m cua· hi:! nay la cOng sua:t d~t Ion gap(3 + 4)ll1n so v6i M xoay. chi~u, phuc tli\P trong v~n hllnh va. stia chua. Nhung nAm ga:n day, do s~ phat tri~n cua kg thu~t di~n tu ct"mg sutlt I6"n, cac M truy~n d(>ng ml)t chi~u dung bl) bien d6i dnh dll du~c ap dl,lng kha rC)ng rAi trong cac thang may cao tdc voi tdc d¢ t6i 5 m/s. 1. H~ tMng 1\1 d(ing kMng eh~ thang mily t6e dQ trung binh He truy~n d¢ng di~n dung cho thang may too d¢ trong blnh thu:bng la M truy~n dC)ng xoay chi~u vl:li dl)ng co kh6ng ddng b(> 2 dip too de. H~ nay dam baa dung chinh xlic cao, th~c hi~n MD.g eAch chuy@'n too d~ cua dOng CCI xu6ng t.6c d(> tha:p (v 0 = 2,5 rn!s) truoc kbi bu6ng thang sAp den san tling. Hi) nay thubng dung ebo cac thang may chlJ kM.ch trong cAc nha cao bing (7 + 10) U.ng) voi t6c dl) di chuy~n cua bOOng thang du6i 1 m/s. ScJ d6 nguyAn Ii di~n eua thang may dUQc gil:li thi~u trAn hlnh 3 - 6. Ca:p ngu6n cung clIp cho h~ bhng cl1u dao CD vll apt6mat Ap. CuC)n d§.y stator cua dC)ng cO dUQc niH vi'io ngu6n clip qua cae tiirp di~m cua cOng tAc to nAng N ho~c c6ngt~ctd h~ H va Cac tiep di~m cua c6ngtactcJ t6c d-Q cao C ho~c c6ngtactd tdc d(> tMp T. Ngu6n ca:p cho m~ch di~u khi~n 11Iy tu hai pha q~ hai· ctiu chi 1 CC. Cac cua tAng dl1~C trang b~ khda li~n d¢ng vl:li cae Mm cu6i lCT ; SCT. Then cai ngang cua li~n d(>ng vOi cAc hAm cu6i lPK + 5PK. Vi~c dong - mlJ ctia tling s~ tac d¢ng Mn kh6a vll then cM cua ting lam ebo nam chAm NC t tac dl)ng. Khi cAt ngu6n nam cha.m NC 1 lu.c 37 [...]... lGT, tin hi~u ra- cua phlin ttt "HO';'C" lH co muc 16gic "1" dua vao pht1n til "vA" IV Ba dau vao con ll;li cua IV d~u 43 co muc lOgic np n@n diu 1'R CUR IV co mac lOgic np, cu¢n dAy cOngtl1ctd H co dong di~n cho dQng cd thea chi~u quay hf,l bu6ng thang ' 1 If (~T IY cnl 1 I - - - - - + : - - - - - j & /f{1I Hloh 3- 1 0 Sci d6 nguyen H kh6ng eM thang may dilng cae pMn tU l(')gic 44 > -1 /f di~n ... ehinh X3.c CEDCS dlla vAo khAu dit1u chlnh vi tri ~, Khi bu6ng thang nAm ngang voi san tting, tin hi~u ra eua khAu CBDCS s~ bAng khOng rl-i cc.i- ITI (" /' ~ ~~ -> 0 r~TI II -= I''-JT/~ ";rTf ~'I ~ (~ ~ ' " '"" ,~ ' !~ ·e·/ 1< 2ft \ '" ~F- ~ ~ll r CPR '" ~ ~ I I{,K ~ " ~ SIT! ~ ~ ~ " 'r' ~ ~ , 'I HI -" '" "'(~ ~ 11' -' II ' 'I '~TI Sit,? II 1m -= I J}:jl '- ~ :,,!J1 1- "'''J ~ n "') ~II iiJI -. ;;:... I{,K ~ " ~ SIT! ~ ~ ~ " 'r' ~ ~ , 'I HI -" '" "'(~ ~ 11' -' II ' 'I '~TI Sit,? II 1m -= I J}:jl '- ~ :,,!J1 1- "'''J ~ n "') ~II iiJI -. ;;: -= RrY -= ~ bl 6) mob 3- 9 a- Tru~n dOng ¢ Ihang !My cao t6c dung h¢ 3th - 0 ; b- ScI d~ kh6.i cua he 8th - D 42 3. 7 Tl1 DONG KHONG CHE THANG MAy DUNG cAc PHAN TtJ LOGIC D~ nAng eaa dci tin c~y trong qua trlnh ,ho~t d¢ng cua thang may, h~ th6ng tv dqng kh6ng... trf bu6ng thang v.v L S , D I Q,S 1 I I , f , • ~2 J 5 u oj 0) mDh 3- 7 C;\m biln VI lri ki.!u dm ung /. 1- Cdu telO b- S41 phil tlauDe L = f (1) 40 1,0 "" 2201" RTr feB C8 I I I c Ilf I c 1IJ 114 b) Bloh 3- 8 So So' d6 nguy@n ly cua cam C*~ bi~n d~ nguyen 19 cUa dm bi!!"n cam ling cAm dng t~n hlnb 3- 8 ~~~_~_~_~ _ _ ung CB D~ nAng caa dQ tin ~y, song song vlti cUQn dAy cua bl) cam bi~n co da:u tMm mOt...:= I YI R 8A ~ !!r 1 - ;v 220/HI' ++ _ DI T ;:: D2 ~ DJ ~D+ _ DS ~ ' Dr; NOI 1[[ I!Tr fD !iT fti[ 46T HilT (/IT /IT) HilT /IT,? f(IlT ( /IN J{IlT !ITt fn JOT J6T RTf tiC _ lOT 1" IUT 16T 1PK N C U[ J{[ , -, ~;v~. _-, ~~tI~ ~~==~;===~ ~T ( lIlob 3- 6 Sd 38 do nguyen Ii ditn 'ella lhang roAy 1[[ bu6ng thang den san Hh;lg, lam quay then cai,... dii'!in tr~n hlnh 3- 7 b Neu dtlu -n6i tiep vtJi cuQn dAy cua b¢ cAm bi~n mQt role ta se d1.1Qc mOt ph~n to: phi ti~p d.i~m d~ dung trong M th6ng di~u khi~n Tuy thuQc van m\1c dich su d\1ng, co th~ dung no lilm cOng tAc chuy~n d6i tling, cam bien de th\1C hi~n dung chinh xac bu6ng thang ho$,c cAm bi~n d~ chi thi vi trf bu6ng thang v.v L S , D I Q,S 1 I I , f , • ~2 J 5 u oj 0) mDh 3- 7 C;\m biln VI lri... dOng kh6ng cht'! thang mAy dung cAe ph£ln ttl' lOgic giO'i thi~u tr~n hinh 3 - 10 DAy Iii sa d6 kh6ng ch~ dan gii'ln nhilt : bu6ng thang ndng l~n d~n rn¢t trong nAm t~ng, nhung khi h(l, chi h(l xu6ng tiing mOt C6ng U.C chuy~n d6i tl1ng dung bl) cam bi~n vi tri bing t~ bito quang di~n IF dfil.t trl!n cae tl1ng tuong ung ' -7 - 5F H(lD cht'! hanh trinh l~n vA hAnh trlnh di xu6ng M.ng hai c6ng tac hi'lnh... 2HC rna ra, cuOn day role trung gian mAt di(!n, tiep di~m thubng kin RTr dong I/ili lam cho ID + 6D sang len bao cha biet thang dang ttb~n ~ va chigu sang cho bu6ng thang Sd d6 nguyl!n Iy trl!n Mnh 3 - 6 130 so d6 cua thang Hip di,it trang nha nam t.1ng va cha tru'bng hQp bu6ng thang dang nam a tllng ml)t Xet nguy~n Ii lam vi(!e cua so d6 khi can len tang 4 Hanh kha.ch di vao bu6ng thang, dong cua tllng... t4ng phi ti~p di~m th1.1bng dung Iil b¢ cam bi~n vi trl kit~u cam ung va b¢ cam bien vi trf dung te bAo quang di~n T~n hlnh 3- 7 a giOi thi~u cAu t~o vil d~c tuyen clla cOng tAc chuy~n d6i bing dung bet cam bien vi trf kit~u cAm dng Ctlu t~o cua no bao g6m : m~ch tu M 2, cu¢n dAy 3 Khi m(lCh tu M, do di~n khang cua cu¢n dAy be, dong xoay chil!u qua cuQn dAy kha Ian Khi thanh sAt d¢ng 1 lilm kin m~ch til:,... thang, thanb sAt dQng lAp (J bu6ng thang Mnh 3 9a gitJi thi~u mf(lch l~c ciR M truy~n dQng m/)t chi~u CBQ bii!n ddi thyristor - d/)ng eCl) cho thang mAy caa t6c vCii v = 2 m/e va trvng tlli Q = 1000 kG T~n Phttn !lng cua d¢ng CO' truy~n d¢ng dllQC ca:p ngu6n tu b¢ bi@'n d6i dnh dung thyristor hOi 2 m~ch c.du chinh hiu ba pha ITI ; 6TI (b¢ thu~n) va IT2 +- 6T2 (b¢ ngt1Qc): Hai hI? nay df1u song song . 7,0 - 1,8 1,8 13, 0 7,0 6 ,3 1,8 1,8 - 7,2 6 ,3 2,8 2,0 - - 6,5 3, 2 2,5 - - 7,0 E 21n uai /' E-1 ngui /" .<,. r" E 13ng yo; f;:: / E lOng 0/. F.R . M ~ -, -1 2 , [Nm], n@'uF<O. Trang dci R - ban kfnh cua puli, [m]. i - ty 96 truy~n cua cd ~u. '1 - hi~u sucH cua co cAu. ( 3- 5 ) ( 3- 6 ) 3. Tfnh t6ng. :,,!J1 1- 1m ~ ~ -= "'''J J}:jl&apos ;- ~ ~ I .n . "') iiJ- ~II I RrY ;;: -= -= ~ 6) mob 3- 9. a- Tru~n dOng ¢ Ihang !My cao t6c dung h¢ 3th