XAC DjNH
THONG S6 c a BAN THI^T Bj PHAN LY KliU ROTOR
PGS.TS va Liem Chinh ' ; KS. Nguyen Tien Dung '; KS. VO Van Hau '
Tom tat: BSi bSo gidi thieu mdt so kit qua nghien cuv, thuat toSn vS chuong trinh tinh toSn, lua chgn thing so ea bin eSc thiit bj phSn ly kieu rotor, ding thdi bude diu da xSy dung dugc moi lien hg giira chuang trinh 2D da thiet lgp vdl chuang trinh 3D cd sin phgc vg vide thiet ki thiit bj nSy. Kit qui thu dugc tu ehuong trinh cho sai so chip nhan dugc so vol thiet bj tht/e ti tai nha mSy xi mSng Sdng Thao.
Summary: The paper presents some reseach results, eaculation program and algorithm, selection of basic speeificiatlon of rotor cage separators and development of a connection between the previously developed 2D program and the existing 3D program used for the design of these equipments. The obtained results from the program showed an acceptable deviation compared with actual equipments used at the Song Thao cement plant
Nh$n ngay 17/8/2011; chinh sira 14/9/2011; chip nhSn dSng 30/9/2011
1. Dgt van de
Thiit bj phdn ly ddng vai trd quan trpng trong nghiin mjn, d anh hudng quyet djnh din ndng suit vd chit lugng san phim, do v f y ed nhieu nghien ciru da dugc cdng bd [1,2,3,4], Tuy nhien, do tinh da dgng ciia sdn phim d n phdn ly, ddc diim d u tao cua td hgp mdy, yeu elu v i ndng suit, dp mjn eiia s i n phim, v.v... Neu cdc thiet bj phan ly hogt dpng theo cdc nguydn ly khdc nhau vd do dd c l u tgo cung khae nhau. Mae dti vgy, do dae diem lam vife ddng khi trong thiit bj phan ly la ddng hai pha nen viec tinh todn thiit bj eg ban la tinh todn g i n dung, dya chu y i u vdo kinh nghifm va thir nghifm tren eg sd ddng mdt pha va tinh lap d i xde djnh gan diing thong sd thiet bj phdn ly.
Trong nhd mdy xi mdng d nude ta thiil bj phan ly hoac duge l i p ddt cting vdi mdy nghien tao Ihdnh id hgp nghien - phdn ly. Dgng t h i i l bj phdn ly chii yeu Id phan ly dpng lyc kiiu rotor. Vi ly do neu tren bdi bdo ehi neu phygng phap xae djnh thdng sd eg ban mang tinh ky thuft vdi gia thiit v f n ldc quay cua tryc rotor Id tham sd.
2. Nguyen ly hoat dpng cua thiet bj phan ly kieu rotor (Hinh 1)
Vat lieu d n nghien dugc d p qua pheu ngp lifu (2) vao may nghiin g phia dudi. Sin phim sau khi nghiin dugc thdi ttr dudi len qua d e cdnh hudng ddng cua stator (7) d i n vting phdn ly ly tam, nhd rotor (6) khi quay vat lifu dugc phan logi. Nhu-ng hgt ed kich thudc dgt ydu c l u Iheo ddng khi qua d e canh eiia rotor vd duge thdi ra ngodi qua eti-a ra (13) den thiel bi thu gom sdn phim, cac hgt d kieh thude Idn ban bj vdng ra dap vao cdnh stator vd rgi xudng pheu thu (8) trd Igi mdy nghiin d i nghiin Igi.
' Khoa Co khi XSy dung, Trudng Oai hoc Xay dung.
E-mail: nguyentiendung. uce@gmall. com ' Cong ty c6 phan Lilama 69-3
76 s610/9-2011 TAP CHi KHOA HOC C O N G N G H E XAY DUNG
KiTQUANGHliNCOU VA ONG DUNG
Hinh 1. Ket eiu chung bd phSn ly kiiu rotor
1. Ding ca; 2. Phiu ngp Hgu; 3. Trgc rotor; 4. Thanh giing; 5. CSe tim Idt; 6. Rotor; 7. Stator;
8. Phiu thu; 9. Vd mSy; 10. VSnh chSn khi; 11. Bich noi rotor; 12. Bleb nii; 13. Cua ra;
14. Goi dd rotor; 15. Hop giim toe.
Nhu vfy, xdt ve nguyen ly thiel bj phan ly kieu rotor thyc hifn phan ly theo d hai trudng:
tm-dng trpng lyc vd frudng ly tdm, trong dd qud trinh phan ly ehii y i u d trudng ly tam. Lfu diim eg b i n ciia thiet bj phdn ly dang nay la cd kha nang dieu chinh sd vdng quay eua rotor d i dam bdo dp mjn ciia sdn pham theo yeu c l u ky thugt dgt ra. Chinh vi ly do nay md khi linh loan nd thdng sd chu y i u duge xdc djnh Id thdng sd ciia thiil bj phdn ly trong trudng ly tdm dya tren gid thiit duge neu trong [3,4,5,6].
3. Thong s6 e g ban cua thiet bj phan ly
Gidng nhu ede mdy vd thiit bj khdc cae thdng sd ea ban cua thiet bj phan ly gdm ede thdng sd hinh hpe, thdng sd dpng hpc vd eae thdng sd ve ddng lye, tuy nhien do dde diim lam vifc, cdc thdng sd ndy liiy theo tinh chit ciia ddng khi thudng dugc linh g i n dung Iheo phuang phdp Ifp [7,8], Bdi bdo ndy chi gidi thieu phuang phdp ky thuft xae djnh g i n diing thdng sd hinh hpc, dpng hpe ea ban (Hinh 2) ciia thiit bi phan ly khi coi v f n tdc rotor la tham sd diiu chinh.
Luu lugng khi V (m^/h) phy thudc vdo tinh chat ea ly eua hgt lifu, nang suit eiia mdy nghiin,w... vd duge tinh loan g i n dung d nhiel dp ban dau 40°C vd nhiet dp khi lam viec 90°C theo [5] ddi vdi mdy nghiin dirng gid trj eiia Ved the tinh loan g i n dung nhu sau:
Khi nang suit Heu hao nang lugng rieng eho nghien q s 4,5 (kW.h/t) thi gia trj khi lieu hao cho 1kg s i n phim \ 4 = 1,6 (m^/kg). Khi suit lieu hao ndng lugng rieng eho nghien q > 4,5 (kW.h/l) cd t h i ehpn V^ theo [9]:
V, =0,15q + 0,75(m^/kg) (1) VSn tie gde eda rotor n^ (v/ph) Id thdng sd ddng hpc r l t quan trpng eiia thiit bj phdn ly vd
d tinh c h i t quyit djnh den kieh thude hgt san phim eung nhu ndng suit ciia thiit bj. Tuy nhidn, vifc xde djnh gid trj n^ chinh xde ngay ttr ban d i u la r l t khd khan vl vgy khi tinh loan ban d i u Ihudng chpn mft gid trj ndo dd ndm trong mien v f n tdc thudng gap (tu- 40-i-120 v/ph ddi vdi thiit bj phdn ly ed ndng suit Idn) sau dd cd t h i tinh lap de Hm dugc gia trj OR hgp ly.
Dudng kinh tmng rotor D'^ (m) dugc xde djnh nhu sau:
TAP CH( KHOA HOC C(5NG NGHE XAY DUNG 5610/9-2011 77
KiT QUA NGHliN CUU VA ONG DUNG
D'„ = C.3 - ^ (mm) (2)
trong dd: C Id hf sd v f n ldc, C = 0,97-4-1,3; V ^ Id luu lugng khi ctia rotor d nhifl dp ldm vifc 90°C (m^/s); o„ la van tde quay ctia rotor (rad/s).
De nhdn thay ring gid trj D^ ngodi viec phy thude vdo thdng sd rotor cdn phy thupc vdo hf sd kinh nghiem C, ndi khdc di phu thupe nhieu vdo kinh nghifm cua ngudi thiet k i cung nhy cdc y i u id diiu chinh sau nay qua gia trj van tdc gde «„ .
Chieu cao rotor HR (m) dugc chpn theo dudng kinh trong rotor.
Cudng dp lang CL (m^/s) la thdng sd dgc trung eho thiel bj phan ly kiiu rotor (hay cdn gpi Id bdnh ehan) va dugc linh nhu sau:
c.
27r.H„vr
(m^/s)Van toe vdng ddng khi Vg, (m/s) dugc xde djnh theo edng thire:
v.. =co„.-^(mls) D'
Vgn toe hudng tSm V/,, (m/s) dugc xae dinh theo edng thire:
y9l
• (m/s)
(3)
(4)
(5) De dim bao thdnh bd phan ly ldm vifc hgp ly gid trj Vm phai nam frong miin: 4,5(m/s) S v« s 6,0(m/s).
Hinh 2. CSc thdng sd hinh hge eda thiit bj phSn ly kiiu rotor
Kieh Ihudc gidi hgn eua hat phan ly irng vdi dudng kinh frong rotor of^„ (m) ddi vdi thiit bj phdn ly kiiu rotor kich thude (dudng kinh) gidi hgn ciia hat phan ly khdng chi phy thudc vdo dgc tinh ky thual eua thiit bj md edn phy thudc r l t nhieu vdo ddc diim ehuyin dpng ctia ddng khi, ndi khdc di phy thudc vdo gia tri ciia hf sd Raynold Re. Nhu vdy, d i xde djnh dungd' phli xdc djnh dugc gia trj cua Re bing phep tinh lap theo gid trj v f n tdc treo lya chpn sg b f ban
78 50 10/9-2011 INP CHi KHOA HOC C O N G N G H E X A Y DUNG
KiTQUANGHliNCOU VA ONG DUNG d i u . Tuy nhien, gid tri ttiu dugc v i thyc chit cung chi Id gan diing, chinh vi vgy d i dan gian hod qud trinh tinh todn d the xem ddng khi chuyen ddng frong viing Stok. Vifc dgt duge gid trj mong mudn cua d^ d t h i dugc dieu chinh sau nay qua van tdc quay eua rotor a>„ . Vdi gid thiit neu fren ta cd:
18;7C, 2 , .
\Pv-Pr o}„£>'„
Duong kinh ngoSi rotor D^ (m) xdc djnh theo d n g thirc:
D«=^-D;(m) (7)
9"
trong dd: dgh Id kich thudc gidi hgn ciig san phim theo yeu d u (m); D^ Id dudng kinh ngodi rotor (m).
Dudng kinh ngoai cda vSnh hudng ddng D^, (m) dugc xdc djnh theo d n g ttitrc kinh nghifm:
DM=^(n^) (8) si eSnh rotor ZR dugc xdc djnh mpt cdch g i n dung dga theo tinh todn sd ednh qugt ly
tdm. Tuy nhien eho den nay chua ed chi dan d l y dii. Vife chpn sd eanh phy thudc vao budc cdnh t, gid trj t thudng dugc chpn ttr (40*60) mm. Nhu vfy, sd ednh cua rotor duge xdc djnh nhu sau:
Z „ = ^ ( c d n h ) (9) 4. Chuo-ng trinh tinh toan thong so thiet bj phan ly ket hgp phin mem 3D
4.1 Gidi thigu chung
Nhu tren da neu thiil bj phan ly kiiu rotor r l t da dang, tuy nhien khi tinh lodn d n xac djnh dugc cdc thdng sd v i hinh hpe (dudng kinh, chiiu eao rotor, stator, sd eanh, kich thudc ednh...), v i dpng hpc (sd vdng quay rotor irng vdi dp mjn), v i ndng suit, v i cdng suit d i n dpng,w... trong dd thdng sd dieu khiin Id sd vdng quay cua rotor. V i nguyen tie vife tinh todn thiit k i thiet bj phdn ly dya tren ea sd linh qugt ly lam va ed t h i thyc hien theo phuang phdp linh lodn bing tay thdng thudng vd sir dyng phuang phdp lap theo sd vdng quay eiia rotor d i cd duge thdng sd hgp ly eiia thiit bj, tuy nhien hao phi nhiiu edng sire vd khdng lao duge su lien hf giua linh lodn vd thiil ke theo phin m i m 3D. Oe khie phye nhuge diim nay lot nhit Id Ign dyng cdc phin mem s i n ed nhu Inventer k i t hgp vdi chugng trinh eon duge thiit Ifp d i tinh todn cdc thdng sd eg bdn eho thiil bj phdn ly. Phan m i m Inventer la phan m i m thiit k i 3D chuydn dyng hifn nay dang duge sir dyng rat phd biin tren t h i gidi. O i xay dung cym phan ly d cdc kich thudc thay ddi theo k i l qua linh loan, la sir dyng kha ndng thiit k i thieh nghi, thiit k i tiieo tham sd eua Inventer. Cy t h i , todn bd kieh thudc cdc ehi Hit trong cym dugc tham sd hod vd d c kieh thudc ndy dugc tham chiiu ldi 1 Hie excel ben ngoai. Cdc cum ldp xdy dgng trdn eg sd dgc dilm hinh hpc cug cdc chi Hit, cdc kich thudc l y do cung tham ehiiu theo du lif u ciia file excel dd. File excel chira cac sd lieu tham chiiu dd dugc x u l l ra tu phan mit.*. tinh todn. Nhu vfy, vdi mdi bf sd lifu Hnh dugc, sau khi ngudi dung update thi Inventer se ty ddng thay ddi kich thudc eiia cdc ehi t i l l vd cua cd cym l i p theo cdc sd lieu mdi.
TAP CHi KHOA HC)C C O N G NGHE XAY DUNG s610/9-2011 79
Cd nhieu phuang phdp ehpn budc thay ddi /?«, budc eang nhd gid trj thu dugc cd df chinh xae d n g eao. Song nhu da neu tren tren, ve phugng dien ly thuyit vife xdc djnh chinh xdc thdng sd ca ban eiia thiil bj phan ly la khd thyc hifn va khdng tranh dugc thyc nghifm vd qua trinh hieu ehinh sau khi l i p dgt. Vi ly do dd budc tham sd OR trong chuang trinh dugc chpn (0,5-2) v/ph.
4.2 Thuat toan chuomg trinh
Tren eg sd d n g thirc xdc djnh cdc thdng sd co ban cua thiit bj phdn ly k i t hgp sir dyng phugng phdp tinh lap de Hm ra thdng sd hgp ly nhit ta ed sa dd thudt todn ctia chuang trinh nhu say (Hinh 3):
Nhap so ieu
Tinh Q,
T i n h V ^
Tinh chieu cao lolor Hn
Tinh gia ITI oldng do tang Q
Tinh van loc hLl6ng tam v«
6
Chon bo Ihong so da bnh:
.IR, tffl, DS, Hfi, D « . .
Tinh lai ciibng do lang Q Tinh sfi canh lolor Z^
Tinh van loc vong v .
Chon s6 canh vanh hiiOng d6ng Z «
Tinh lai van loc hucing tam v„
T i i h n f l n g s u a t
r r i h dudng k H ) vanh hodng
dbng
rinh so bd c6ng sual d i n dong
In bo ^ d n g so cd ban
Xual diir lieu tham sd
Nhap so ii^u vao phan mem Inventer Z ^
M o p h o n g l h i S l b i l h i ^ k f i
Kei thuc
Hinh 3. Sa do khoi tinh chgn thong so cua thiet bj phan ly
80 sd 10/9-2011 TAP CHf KHOA HOC C O N G N G H 6 XAY Dl/NG
KiTQUANGHIiNCOO VA ONG DUNG Chugng frinh dugc xdy dyng tren ngdn ngir Ifp frinh Visual Basic. Phin mem cd giao dien nhu hinh 4 dudi day:
•J»\ FINH TOAN SO BO CAC GIA TRI N a u K ^ u a l i q e l d r u '^^wn nang mot Q
200 W Tinh
Tiiili s o b o diK>U}£ kiiili t r o u ) : R o t o Haf ebon gl a tn cu a h e so van toc C
n 21 < - C <"1 71 J
Nang l u a t n g h l e n Q_i (kg/i) o_.- I
L u u liioiiie k i l l veil c a u o 4 0 d o c Hay d i o n gl a tfl mat UBO hao nang loong neng q_w
Cq_w > - 5 tioacq_w <Si
CUW- I I |kwh/ll 1 ^ Tinh L.UU luong khi yeu cau • 40 do C
c= I Tzi
Dugng krih trong cua Roto D_ti- I
- T i n h t o a u c n c }>in t r i Q K m b e so trong khoang | 0 7
OSadenO.S) O u e u cao caa Roto
[ > Tinh
W Tinh
V_yc-r
L u u liiouK kill y e u c n u o 9 0 d o c L.UU luong khi yeu cau o 9 0 do C V-yc- p
He 10 nong do bui trong he phon ly C_o- I
CDongdolang
c.- I
Van toc dong
Im)
{rr>2/£)
(m/j)
C ^ Kiem t r a
T l i i h s o b o v n u t o c ttoc q u n y R o t o | v / p l i ) Van toc goc quay N_r • (40 -120) I ^ [ ^ Ven toc goc roto
W r - I (rad'sl
Van toc dong trong chuyen dong huong tam V_ht- I M s )
Oiol han phan ly
Daong kinh ngoai cua Roto
^ L o a d file | ^ Luu r a file
Im
ItyKiem lia; 1
'\M Kiem tia
g"
T b o j i lHinh 4. Giao di$n chuang trinh tinh toSn thdng so thiit bj phSn ly kiiu rotor 5. So sdnh ket qua
Oe kilm chtrng d f tin cdy eua chugng trinh tinh da thiet lap ngudi viet da tinh loan thiet bj phdn ly cho mdy nghien lifu nang suit Q = 200 l/h vdi kich thude gidi ban [dgj = 9dm. Ket qud linh lodn duge neu trong Bang 1 vd so sdnh ket qua vdi thiet bi phan ly dang dp dyng tgi Nhd mdy Xi mdng Sdng Thao vdi cting nang suit may.
Bang 1. So sSnh kit qui tinh toSn bing chuomg trinh vS thiit bj phSn ly dS cd
^\Thdng s6 TBPL\^
Theo chugng frinh
Thill bj phdn ly dang dp dyng tgi nhd mdy xi mdng Sdng Thao
% khdc nhau (m)
3
3.1
3.2 (m)
3,4
3.4
0 (m) 2.1
2,2
4.5
(m^/s) 8,04
7,694
4,7
(m/s) 11,25
-
(m/s) 5,36
-
(m) 99,2
(m) 87,5
90
2,7 n (v/p)
70
TAP CHI KHOA HOC C O N G N G H $ XAY DONG
5610/9-2011 81
KiTQUANGHliNCOU VA UNG DUNG 6. Mot so nhan xet
So vdi ttiiet bj phan ly dang dugc trng dyng, ttiong sd cac ttiiet bi phdn ly dugc tinh todn ed sai sd cd ttie chap nhdn duge vd chtrng td budc chgn ORld hgp ly. Sai s6 ndy khd trdnh khdi vi qua trinh tinh loan Id g i n dting vd phy thuoc vdo kinh nghifm ctia cua ngudi linh.
De phu hgp vdi yeu c l u ky thuft ddt ra, sau tinh todn c i n phai duge thir nghifm hogc hifu ehinh sau l i p dgt bang each thay ddi sd vong quay ctia thilt bj d l dam bao d f mjn vd ndng suit yeu c l u .
Chugng frinh dugc thiel Ifp da giup cho ngudi thiet ke cd dugc qud trinh tinh todn nhanh hgn cung nhu tgo duge sy lien ket giQ'a chugng trinh tinh todn 2D vdi chugng trinh tinh lodn 3D cd san, luy nhien chi cd the xem ddy Id budc d i u do vfy vifc nghien ctru ky vd sdu hgn, frong dd cd vifc xay dyng thu vifn ve vft lifu, ve hf truyen dfng, ve cac chi t i l l vd cym ehi t i l l tieu ehuan Id rat c i n thiel.
Hy vgng cdc nfi dung neu tren cd the gill quyet a mite do nhit djnh mdt sd v i n de trong tinh todn thiet ke thiet bj phdn ly kieu rdto Irong nghidn min.
Tdi Hfu tham khao
1. Vu Vdn Hgu (2010), Nghien ciru, thiet ke, chi tao mSy nghiin dimg (nghiin than, nghiin li$u, nghiin elinke) eho day chuyen ximSng Id quay edng suit 2500T clinke/ngay, D l tdi KH&CN d p Nhd nude thufc dy an thiet bj xi mang.
2. Ngd Qudc Hung, Nghidn ciru thiit ki va ehi tao mSy nghiin bgt sieu mjn hiiu suit eao iing dgng trong cdng nghigp, Bdo cao tdng ket de tai KH&CN, ma sd KC 05-22.
3. Mathias.Stiess. Mechanische.Verfahrenstechnik, lom 1 & 2. Springer Veriag, 1995.
4. Kalalog eua cae hang: Loesche, Pfeiffer.
5. Mafned H.Pahl. Zeri<leinerung stechnik. Veriag Tuv Rheinland.
6. M.5R Cano>KHMKOB (1997), Cnpao^HUK no odopydoeanuio aaeodoe cmpoumenbHbix Mamepuanoe, Mockba.
7. Vu Liem Chinh, Dd Qude Quang, Cao Van Mo (2008), MSy - Thiet bj vS he thong ISm nghiin mjn, Nxb Xay dyng. Ha Npi.
8. Waller.H.Duda (1977), Cement-Data-Book, Bauveriag, GmBH-Wissbaden und Beriin.
9. PGS.TS Vu Liem Chinh (2008), Nghien euu, thiit ki thiit bj phan ly dang bSnh ehSn (rotor) vdi su trg giup eua mSy tinh, De tai khoa hoc & cdng nghf e l p Bp, Ma sd B 2008-03-34.
10. PGS.TS Vu Liem Chinh (2004), Nghien cuu eSc ea sd tinh toSn vS lua chgn hap ly cSc thdng sd cda mSy nghidn true dung banh lan, De tdi khoa hpc & cdng nghf d p Bd, Ma sd B 2004-34-53.
11. Holbank, Grinding manual, Holbank management and consulting Ltd, Technical eenler- proeess-Technologie, Divison.
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