NGHIDN CL/U-TRfiOodl TiNH TOAN THIET KE GDI U6 THUY LITC LAM VIEC THEO NGUYEN LY MANG DAU MONG IS D6 Q U C Q U A N G , TS N G U Y I N Q U A N THANG KS CAO V A N M O , K S T A N G BiCH twA Vlfn Cflng nghj, BJ Cflng tluill| Bai b^o trinh bay cac ke't qui nghl§n cufu, tinh to^n gCTi 08 thu^ \\le dang chdn sD dyng m^y nghign tSng aing suSft 15 T/h - sdn phJm cda Oi tdi cSp nhjl nirtc "NghiSn cl}u tfnh toan, thiS't Ite'vd cOng ngh$ chfi^t^o gCTi dd thuy l^c chju t i i n$ng Sk 80 ta'n", ma s6'KC.05.18/06-10 TrSn cd sd mO phing Monte-Carlo, siir dgng thujttoin DE (Differential Evolution) d^ tfnh cdc hf sflf khOng thd" nguyfin, Oi tdi da xdc djnh difgic cdc thdng s6' hlnh hpc tS'i ifu cQa m9t segment gCTi d9 thfiy l^c ddm bdo cOng suS) bdm da~u qua khe la c^c ti^u Tif khoa: Gol US thuf life, OS mang diu mdng Fluid Think Film Bearing, Kingsbuif i CALCULATE DESIGNING FLUID HLM BEADING WODK ACCOCDING TO FLUID THIN RLM THEODY This paper presents the result of researching, calculating Fluid Thin Film Bearing that is type of thrust bearing uses for Vertical Roiling Grinding Machine Based on Monte-Cario simulation, used DE (Differential Evolution) algorithm in order to calculate some nondimensional coefficients to determine opHmal geometric parameters of segment Into Fluid Thin Film Bearing so that Fluid goes through slot with minimum pumping capacity I Ddt Win i t G6i (3d thu^ \gc chju tdi n$ng dpe tnjc, d^ phing c6 kfit du hl$n dgi da dupc dua vio Oing dgng tO nhOng nam diu cOa th£ k} XX G6i thOy luc l^m vi$c theo nguydn ly mang diu m6ng (Fluid Thin Film Bearings), vdi cM d$ b6i tran thuy d^ng ho$c thuy tfnh Bty li dang trUdt ch$n (hudng tnjc) c6 t6c d$ qii^ Idn, hi$u suSt cao, vdi dii cAng suit tmyjii dOng til 50+9.500 kW vi chiu tii trijng IhSiig dUng 10 50*1.200 tin Trong trUcJt chjn d?ng bfti trdn thUyl*, mling diu b6i Iron glOa hai b i m$t c6 chiiu diy h duoc hlnh th4nh bdm diu c6 ap suS cao vi cdc hdc diu (bu6ng t^o ip) giila liai bi m$t Chiiu diy mdng diu h kh6ng d6i ci tic d$ tUdng d6i glOa hai bi mat bS This result's apiyed for calculating of Fluid Thin Film tran bing khdng Gfii thuj ITnh c6 thi coding Bearing that is type of thrust hearing Is used for Vertical hlnh hpc bit k^: phing, trg, trbn, c6n, h * Rolling Grinding Machine with Capacity at 15 tons/hr ciu nhung dang cCia mjt ty Iu6n tuang Ongvii - Product of National Pro|ect "Research ealculeling, dsng cDa m j t tua Ddng diu hudng B bu&S designing i machining process FluU Thin Film Bearing theo b i mSt tua chiy phin chu vi ciia ni v4 wm Load at SB tonsT with KC.05.18/0e-10 Code s§ dupc cip trd Iai buing tao ip B l khe bS giOa hai mil cDa g«i dd thujrfihhkhftng dS*' I TGpchiKHOAHM ,,, NGHIDN COfU-TRflOedl iupng d i u kh6i gSi m$t dan v| thdi gian ph&i bing lupng d i u cap v i o g6i B i i bao d i c i p d i n phuong phip tlnh toin, x i c djnh c i c thdng s i hlnh hpc t i l Uu cDa mdt segment bdi tran thDy tlnh cho cdng suit bOm dau qua khe l i cue tilu thdng qua vide tlnh toin cac hd sd khdng thU nguydn, trdn ca sd md phdng Monte-Carlo v i sQ dgng thu^t toin DE (Differential Evolution) II Phuimg phap tinh todn h i sfi khdng thu' ngiwfin cho gfii dfi" thuy tlnh dangfiirnqt chdn vdi tfm ito' dpng segment hinh dd qupt Moi gd'i dd thCiy ttnh d i u iim vide theo nguydn tac cip ddng d i u bdi trdn cd i p lidn tgc v i o gida hai b i mit chuyin ddng tuang ddi Chit lupng lim vide cDa loai gdi dd nhu v$y phg thudc ehCi yd'u vao dd tin c$y hoat ddng cija h§ thdng c i p diu bdi Iron Khi tiln hinh thilt k l thudng dga v i o ba dai lupng khdng thU nguyen la a, - hd s i t i i trpng, q, hd sd IUu lupng va H, - hd s6 cdng suit d l ehpn Iga cac kich thudc hlnh hpc hpp ly cho cdng suit diy diu qua khe hpp cd g i i trj cgc tilu [1] Gia trj cDa nhOng dai iupng n i y khdng phg thuoc v i o cac kich thudc tuydt ddi cCIa gdi ma chl phg thgpc ty le giOa Chung, chinh x i c han l i ty s i didn tich cOa budng tao i p vdi ting didn tich b l m i t cDa gdi dd Do viy, vide x i c djnh c i c hd so khdng thU nguydn cho mdt dang hinh hpe eg t h i cOa g i i dd thDy tTnh CO y nghTa h i t sUc quan Hd sd t i i trpng cfla gdi dd thuy tTnh a, dupc xac djnh bing bilu thUc: Cdng suit c i n thid't oDa bom d l diy d i u qua khe hpp gdi dd dupc tlnh bang tich giOa i p luc buing v i luu lupng qua 6: H, = P,.Q = H,.(—)'.- (3a) H,=^ Trong dd H,la hd sfi cdng suit Trong c i c t i i iidu [1], [2], [13L [14] d i gidi thieu cdng thUe xic djnh cic hd sfi khdng thU nguydn (a,, q,, H,) cho gfi'i dd trdn bufing trdn trung t i m , gdi dd trdn budng vinh khin, gdi dd chO nhit budng chO nhit, hinh edn, hlnh c i u Hd sd khdng thU nguyen a,, q,, H, cho gol dd trdn budng trdn trung tim (hlnh 1) dupc xac dinh theo eic cdng thUc sau [14]: it) •ft) Hinh 1: sd dd g6i thuy ITnh co buSng diu hlnh trdn JOf-if) A - di$n tfch hlnh chiSu cda b^ m§t tga (cm^) p - i p Igc bii6ng diu cd khe h i (kg/cm') i He s6 luu lLf(?ng c£ia goi de thdy tTnh q, dUdc xac I djnh is^ng bilu thCi'c: «'-^ ^^' Q - li;u iucfng d&u (cm^/sec) W - tai trpng tde dyng 16n gfii dd (Itg) h - cliilu day mdng dfiu boi trdn (cm) m - dO nhdt tuy$t d6i cOa dSu bdi trdn (kg.sec/cm*) m H$ so khSng thiJ nguyen a,, q,, H, cho g6i dQ co bu6ng dau d^ng vanh kh§n (hlnh 2) dU(?c xac djnh theo ckc cdng XhOc sau [14]: W - khS nang chiu tii thgc cOa gSi ^^^ (3) ' H I M ti.Li , J ^ *•;• Hinh 2: sa dd g6i thuf^ (inh cd budng diu hlnh vAnh khSn Ji^) V^^-i)-^^^4 S«2 + 3nam2013 ^ I^PfiLSJJjgJ: cdNCNCdeviEiNi 89 NGHIDN ClJU-TRfiOBdl H i sd khfing thU nguydn a,, q,, H, cho gfii dd cd bufing d i u dang hlnh cdn (hlnh 3) dupc xic dmh theo cic cfing thUc sau [I]; M0t sd tlnh toin thdy lgc cho ddng diu cd ip chiy qua khe hgp [4] PhUPng trinh chuyin dfing v i t i e dfi ddng ch%: =-L.^.(/-y./.) iTl-(ô,/ô)ã (4) 2.H dr Tde dfi dat g i i trj cgc dai y = h/2, c6 nglila li: -""2.^•*•*4 2' 8n dr Tde dd trung blnh cua ddng chiy ting lKEHMfl" MAUJHH0CTPOMTE/l"bHAJ1 JIHTEPATVPA - MocKsa, 1963 Nguyen HOu Chf: "Ccf hQC ch^t I6ng Cfng dyng - TSp 1; PhSn dai CUdng" Nxb Dai hgc vS Trung hpc chuySn nghigp -HdNOi, 1972 Nguy§n Phi/dc Hoing: 'Thily Ijc vS miy thuy lyc - T§p 1; ThOy iMc dgi ci/dng" Nxb Dgi hi?c vii Trung hgc chuydn nghidp - H i N6i, 1970 W.B Rowe, J.P O'Donoghue: "Design Procedures for Hydrostatic Beartngs" M Davis Himelblau: "Aplication Nonliear Programming" - Mir, 1975 Zbigniew Michalewicz: "Genetic Algorithms + Data Structures = Evolution Programs" Springer - Verlag, 1994 8.S.Kirltpatrick,C.D.Gelatt,Jr.M.P.Vecchi:''Optimization by Simulated Annealing Volum220'' SCIENCE, 1983 Rainer Storn, Kenneth Price: "Differential Evolution A Simple and effective scheme for global optimization over continue spaces", 3-1995 10 Kenneth Price, Rainer Storn, Jouni Lampinen: "Differiential Evolution - A Practical Approach to Global Optimization" Spnnger, 2005 11 Kingsbury, Inc - 2003: "Equalizing Thrust Bearings - Comprehensive Design Guide 2003" Jk\ li$u Internet 12 FLENDER - 2006: "Bevel Planetary Gear Units for Vertical Mill Drives" T i i ligu ndi b$ 13 R Gohar H.Rahnejat: "Fundamentals of Tribbology" Imperial College Press, 2008 14.BorflaHOB.O.M:"PacHeTOnopCKOjn>)KeHMJi".TEXMKA KMEB, 1966, Cdc khdo nghifim thgc hien d l tai cho thay: goi dd thuy lgc dUdc c h l tgo vdi cdc thdng s i hinh I hpc dUdc tfnh toan theo phUdng phdp dd ndu lam I viec I n djnh, cac thdng so Idm vide dgc dUdc I khdo nghidm hoan todn phD hdp vdi tfnh todn NhU o ^ o n - ««^« S52.3nam2013 TapcWKHOAHft jtocNCHtVUlNlfl I ... dp=^-^.(8) h Jtp r TU (8) ta cd t h i nh§n xdt ring: dpe phiMng hUdng kinh theo chiiu ddng ehiy, i p lgc diu giiiJ d i n theo h i m logarit LUU lupng ddng d i u dupe bilu thj dual dsng dQ Tuy nhidn,... dudi dang p,, khoing tU r,, dd''n r„ i p luc thay ddi theo quy mdi: lu$t logarit K h i ning chju t i i cDa gd''i trudng h''.p, hpp chung tlnh theo cdng thUc: Q (14) I2n • >y = 1^1, +\ P,.dF (11)... suit: sau d i cd hai he so a, va q, thi H, dupe tlnh theo (3) Nhu vay, bilt dang hlnh hpc cDa budng, dang hlnh hpc cDa bidn vdi dfing diu chiy bidn theo chllu hudng kinh ta cd t h i cai d$t ehUdng