NGHieNCO'U-TRAO Ddi NGHIEN CLTU OpNG LyC HOC HE TRUYDN OONG THOY LyC DAN OONG HE TH6NG KEP cpc COA MAY EP cpc THOY LI/C \ Dl CHUYfeN Bl/aC RESEARCH DYNAMIC OF HYDRAULIC TRANSMISSION SYSTEM TO CONTROL PILE CLAMPING BOX OF HYDRAULIC PILE PRESSING MACHINE WITH FOOTSTEP TYPE WALKING MECHANISM ThS Nguyin Ngpc TVung, PGS.TS Nguyen Bing Difm, PGS.TS Nguyin Vfln Vinh Trudng Dai hpc Giao thdng Van tai T6M TAT Bdi bdo trinh bdy torn tdt cdc kit qud nghiin cuv dgng luc hgc hp truyin dgng thuy lifc (TDTL) dan dgng hp thong kpp cgc cua mdy ep cgc thuy luc di chuyin bu&c, hipn dang dugc su dung tgi cdc cong tru&ng thi cong & Vipt Nam, tie khdo sdt, ddnh gid dnh hu&ng cua cdc thon sd dgng lire hgc hp TDTL den qud trinh ldm vipc cua bg cong tdc Ddy Id kit qud nghiin ciru cua tdi cap Truang T2016-CK-41, gdp phdn vdo viec ndng cao dg chinh xdc tinh todn, thiet ke h TDTL vd Id ca s& di tu dgng hoa qud trinh ldm viic cua mdy Tir khda: Dgng lyre hgc, hp thong thdy luc, hpp kep cgc mdy ep cgc thuy lire ABSTRACT The article presents Ihe research results of dynamic of hydraulic transmission system to control pile clamping mechinism of hydraulic pile pressing machine with footstep type walking mechanism in Vietnam, from that survey and assess the impact of the dynamic parameters on th hydraulic transmission system in working process ofpile clamping mechanism This is the resul of research project with code T2016-CK-41 to improve the accuracy of calculation, design of th hydraulic transmission system and is the basis for automation of the work process of the machine Keywords: Dymanic, hydraulic system, clampingbox, hydraulic pile pressing machine DAT VAN DE Hifn nay, d Vift Nam, vdi tdc dp dd thj hda cao kdo theo nhu cau phat then nha cao ting cang tang tgi cac dd thj Idn Do dd, sd lupng trang thi^t bi va may mdc phpc vu cdng tac thi cdng nen mdng cho cac cdng trinh cung cang nhidu Mpt nhung logi may dupc sii dung cang nhidu la may ep cpc thuy lpc di chuyen budc nd cd nhidu uu didm ndi trpi Tuy nhien, hlu hdt cac loai may ddu dupc nhgp ngoai, va cac dan vi san xult nude ciing chua cd nhieu ca sd khoa hpc dh thidt kd, chd tao logi may thay thd cac thiet bi n h ^ ngoai Trong qua trinh lam vifc ciia may, bp phan k?p cpc cd ap suit iam vifc ^ ISSN 0866 - 7056 TAP CHf CO KHf VI$T NAM, Sd nam 2016 www.cokhivietnam.vn NGHIEN CU'U-TRAO 0(!)l hf thdng thuy luc din ddng ma kep cpc la cao, qua trinh iam vifc thudng gay hifn tupng dao ddng ap suat, dac bift la giai dogn qua dp, day la mpt nhiing nguyen nhan cd anh hudng true tiep den chat lupng, tudi thp ciia may va cac thiet bi thiiy Iuc Do do, vifc nghien Cliu dpng lpc hpc cua he thdng cac xi lanh thiiy luc kep cpc ciia may dp cpc thuy lpc di chuyen kieu budc mpt each bai ban de iam co sd cho vifc thiet ke va che tgo logi may nuac la can thiet, gdp phan nang cao dp chinh xae qua trinh tinh toan, thiet ke, giiip cho vifc khai thac, su dpng may cd hieu qua va la ca sd de ddng hda qua trinh lam viec ciia may ^^ NQl DUNG H$ thdng TDTL dan dpng h^ thong kfp cpc cua may ep cpc thuy l\rc di chuyen budc nhu tren (Hinh 1) Nguyen Iy lam viec nhu sau: Bom diu (2) dupc din dpng nhd dpng ca (1) cung cap dau cao ap cho xi lanh thuy lyc di chuyjn ma kep cpc (9) Xi lanh (9) lam vi?c hai chieu, vi?c thay ddi chieu ho^t dpng cua xi lanh nhd vao van phan phdi (5), van dupc di^u khien nhd tin hi$u di$n De dam bao an to^ cho mach thiiy Itre va xi lanh qu4 trinh lam vipc sir dung cic van an toan (3) vii (7) iC N—ir~ ITinh Sadi hg TDTL dan dgng md kgp ege eua mdy ep ege thuy lite di chuyin bu&c: IIDong ca: llBam etiinh IfVamai loan long: 4) Ddng tiddoap suai: S) Van phdn phoi dtiv khiin difn 6) Km mpf chieu eo dihi khiin: 7) Van an loan xi ihHy hrcStXitanhkfpc(ie:9iMdkfpeoc lOtBdu toe ddu IttTKmgdau De xay dung md hinli dpng ltic hpc tie thdng TDTL, c4n cd mpt sd gia thijt sau: IChdng xet qua trinh t^ip sdng dng dan diu thuy luc; Md duyn diu dan hdi ciia cac dng dan ffmh Md hinh nghien ciiu dgng life hgc TD ddn dgng md kgp cgc khdng phv thuOc vao dp suit h$ thons Tdn thit nang lugmg h^ th^ng dupc tink thong qua ma sit nhdt, ma sit khd vi mit mil thi tich ciia bom thuy \ifc; Luc can npi ma sil ISSN 0866-7056 TAP CHJ CO KHl VifT NAIVI, Sd nam 2016 www.cokhivietnam.vn NGHieN CLfU-TRAO D I cua xi lanh dupc ke den qua hifu suat ca T^; Khdng xet den quan tinh cua chat ldng qua trinh lam vifc; Cac thdng sd ciia chit Idng iam vifc (ty trpng rieng, dp nhdt, md duyn dan hdi the tich) la hing sd; Tam xi lanh thiiy luc din dpng ma kep cpc la gidng nhau, nen chi xet cho mft xi lanh Tir cac gia thiet nghien ciiu nhu tren, nhdm tac gia xay dung dupc md hinh nghien cuu dpng Ipc hpc cua he tfadng TDTL din ddng ma k ^ cpc nhu (Hinh 2) Dh xay dung md hinh bai toan dpng lpc hpc cua hf TDTL ndi tren, nhdm tac gia sir dung djnh Iuat bao toan nang Iupng, vidt cho phuong trinh ddng chay lidn tpc ciia dau cong tac cac dudng dng va phucmg trinh can bang lpc *) Phuang trinh ddng chay lien tpc dudrng dng cao ap dupc vi^t nhu sau: QjT Luu lupng chit Idng lam bidn dang h? thdng: (V) dt Trong dd: E_ - Bien dang dan hdi dng din cao ip, bidn dang dupc xic dinh nhu sau: V E, V E, The tich dlu cdng tac duong dng dan bang cao su dupc xae dinh: V,=^l ' ' Hay a=-^(a-e„»)-e.-e« (2) (9) The tich dlu cdng tac dudng dng din bing kim loai dupc xae djnh: K=^l, * ^(a-ej-a-e^-e,=o (D (8) (10) Q^ - Luu lupng qua van an toan tdng, N^u p ^ ^ thi,g, = {p„ - pjk„,; ngupc lai Q^ = 0; Thay vao phuong trinh (2) chiing ta thu duijic: Trong do: n^: Sd Ixrm lam vi?c, n^ = 3; n^: Sd xi lanh k?p, n,, = 8; Q^- Luu lupng ly thuyet ciia bom, a = >',.4« cdng tic Mo duyn din h6i ciia diiu cong tic •• E Mpa 150 „ C'j ' J i P ^ ' C i c thSng s6 khic 23 Lyc cin tic dvmg vio ma kep cpc F^ N 2063500 Thay doi 24 IChoi lupng quy din ciia xi lanh vi mi k?p cpc- m kg 96,53 ISSN 0866-7056 T ^ CHl CO KHl V1$T NAM, Sd nim 2016 www.cokliivietnain.vn NGHlfeN CU'U-TRAOBOI Ch?y chuemg trinh chiing ta thu dupc cac kdt qua sau: t t Hinh Qud Irinh IhfC hign kep cgc K.^- j YBJM| ^ aoTs 00074S2 — • B^ ,- 0.1 0.2 0.3 TTxii gian, s 0.4 0.5 ^ V MM*^ — t • )ID.» L - — \ 0.1 Thoi gian s Q2 0.3 THol gian, a 0,4 0.5 M Hmh Cdc ket qud tinh todn mdy thyrc hipn kpp cpc Trong qua trinh k?p cpc ciia may, vdi cac kdt qua d tren cd thd thiy cac thdng sd dpng lpc hpc thay ddi nhieu giai dogn bit dlu thpc hifn kep cpc, sau dd binh dn ve gia tri tri tmng binh cua nd, cu the nhu sau: - Ap suat mach cao ap thay ddi va gia tri ap suit dgt gia tri IOTI nhit cp thd: Ap suat dfng la 35,6.10* Pa, ap suit binh dn la 21,6.10* P«i - Van tdc va gia tdc k?p cpc thay (16i theo thdi gian cd gia tri lom nhat 5,2 m/s tgi tWn didm 0,2 s, van tdc kpp cpc dgt gia tri trung binh 0,007 m/s, ma kep tiep x6c vdi cpc thi vjn ISSN 0866 - 7056 TAP CHf CO KHf V £ T NAM Sd nam 2016 NGHIEN CLfU-TRAODOI tdc bang m/s va gia trj trung binh nha cpc la 0,04 m/s - Luc kep cpc ciia xi lanh thuy Iuc ciing thay ddi iing vdi gia tri ngoai lpc tac dung vao xi lanh Lpc kep cpc phat sinh ldn nhit ma kpp tidp xiic vdi cpc va gia tri luc la 3,4.10* N, sau dd gia tri Ipc kep lam vifc binh dn d 2,06.10* N KET LU^N Tu cac ket qua nghidn ciiu nhgn dupc, nhdm tac gia riit mdt sd kdt luan sau: Khi may iam vifc thi ap suit ciia dlu cdng tac he thdng TDTL s6 dao dfng, qua trinh dao dpng ciia ap suit dlu phu thufc vao nhieu yeu td, dd phan lpc ciia cpc tac dpng vao xi lanh la ydu td tac dfng Idn nhit ddn ap suit dlu cdng tac va cd thd ndi, ap suit la thdng sd "dgi difn" cho dp ldn cua tai ben ngoai Dao dpng ciia vfn tde va gia tdc ciia xi lanh k^p cd bien dp va tin sd lan d giai doan ma k?p tiep xuc vdi cpc, phat sinh luc dpng anh hudng ldn ddn qua trinh lam vifc, anh hudng den chat Iupng va tudi thp cua cac thiet bi thuy lpc Dd khac phpc hifn tupng nay, chiing ta cin bd tri cpm van tiet luuraptchieu cac ket qua nghien ciiu nhu trdn, phin nao da danh gia dupc miic df anh hudng cita cac thdng so dfng lpc hpc den sp thay ddi cua ap suat dlu cdng tac, vgn tdc, gia tdc va luc cua xi lanh thuy lpc qua trinh k^p va nha ciia ma k^p cpc Tuy nhien, de cd the danh gia chinh xae miic dp anh huang cQng nhu kiem nghifm cac kdt qua tinh toan ly thuyet chung ta cin phai cd nhQng nghien cim thpc nghifm, nhim danh gia miic dp chinh xae cua cac ket qua nghien ciiu ly thuyet cac kdt qua nghien ciiu la ca sd khoa hpc gdp phan vao vifc nang cao dp tin cgy tinh toan thidt kd hf TDTL va la ca sd de tu dpng hda qua trinh iam vide ciia toan bd co cau kep va ep cpc cua may dp cpc thuy luc di chuyen budc d \^ft Nam.»> Ngay nhgn bai: 08/7/2016 Ngay phan bien: 10/8/2016 Tai lifu tham khao: III MaHopoBlO.n., KoBajibCKHiiB.O., /lydpoBHHB.A., rpyHHHE.M - PacHemapaMerpOB nepexoAHbix npoueccos rHapaejumecKHx npHBOAOB c oGb^MHue pery.nH[>oBaHHeM cKopocTH - M.: M H H T , 0 r., c 121 N g u y e n DinhTir (2010) OSocHOBauHe pauHOHaju>H£iix napaMCTpoB rHAponpHBOAaMauiHH THna B l i p c yHCTOM ycjioBHH 3KcajiyaTauHH BO BberuaMe Lugn an t i l n sT - Matxcova [3] N g u y e n N g p c T m n g (2012); "Frame design of an 800 tons hydrualic static pile pressing machine with hydraulic footstep type walking mechanism" Master's thesis, Budapest University of Technology and Economics, Hungary [4] ZhouXu (2009) "Research on System of Pile Driving of Hydraulic Static Pile Driver" PhD Th^is, Cental South University, China 15] Bao cao tdng Wht dd tai cap Tnrdng T2016CK-41: "Nghien cuu dpng luc hpc hp thing xi lanh thuy luc cua mdy ep cpc thuy luc di chuyin bu&c thi cdng cdc cdng trinh xdy dung a Vipt Nam " ISSN 0866 - 7056 TAP CHf CO KHf VI$T NAM, Sd nam 2016 www.cokhivietnam.vn ... 18 Mo duyn din hdi cua dudng dng lam bing cao su E, Mpa 0,09E6 19 Mo duyn din hoi ciia dudng ong lim bing kim loai E Mpa 0,21E6 20 ChiSu diy ciia dudng ong cao su 8^ m 0,006 21 Chieu diy ciia dudng... cpc (9) Xi lanh (9) lam vi?c hai chieu, vi?c thay ddi chieu ho^t dpng cua xi lanh nhd vao van phan phdi (5), van dupc di^ u khien nhd tin hi$u di$ n De dam bao an to^ cho mach thiiy Itre va xi lanh... Sadi hg TDTL dan dgng md kgp ege eua mdy ep ege thuy lite di chuyin bu&c: IIDong ca: llBam etiinh IfVamai loan long: 4) Ddng tiddoap suai: S) Van phdn phoi dtiv khiin difn 6) Km mpf chieu eo dihi