Thong tin khoa hoc cong nghe mo GAI TAO HE THONG TRUYEN DONG DIEN CHO CAC MAY XUC EKG-4,6(5) mot giai pliap mang l a i liieu qua Up to now, there have been 58 EKG -4,6 (5) excavators ThS-VUTH^NAM from Russia (former USSR) being used at Vietnam open KS DAO ANH TUAN pit mineral mines So far, it is considered as a kind of KS TRAN TRQNG HOAN excavator having high productivity and efficiency in the Vien Khoa hgc Cdng nghe Md- Vinacomin mining industry The paper refers to the solution for improving its electric transmission system proposed by Russian experts - Dat v i n d§ May xuc EKG-4,6 (5) eua Lien X6 (cu) hien tai duae sii' dung rat bien khai thae mo cua Viet Nam, rieng Tap doan Cong nghiep Than Khoang san Viet Nam Vinacomin da eo 58 may xuc EKG-4,6 (5) dang van hanh tai eae mo 16 thien May xuc EKG-4,6 (5) phan lo-n la mlu thiet ke tir nhiing nam 40 cua the ky truo'c va he thong truyen dpng cua chung hogt dpng theo nguyen ly May phat - Dong ca (G-D) U'u diem thiet ke cua hp thong G-D la CO tin cay tuang doi cao vo'i dieu kien phai thuang xuyen theo doi va thay the kip thai cac bp phan hao m6n (v6ng bi, choi than ) Tuy nhien, vipe thay the cac linh kipn mpt mat lam tang chi phi van hanh, mat khac neu nhu khong thay the kjp thdi se din den cac hdng hoe khac Idn han ma vipe khac phuc chiing ddi hoi eae ehi phf Idn va ca ve thdi gian Ngoai ra, hp thong cac dpng ca va may phat cdn lam tang dp rung va tieng on qua trinh v$n hanh may Kinh nghipm cua eae nude tien tien tren the gidi da cho thay tinh uu vipt eua vipe ap dyng cho may md cac hp thong truyen dpng dien tien tien hon vdi eae bp bien doi khong c6 cac phan tu' chuyen dpng Su' dung eae bp bien doi bang ban din cho phep tang he so cong suat coscp cung nhy eae ehi tieu kinh te ky thuat eua hp thong Dirng vj tri dau tien d eae nude SNG ve san xuat cac he thong dieu khien ap trpn bp (NKU) cho eae loai may xiic tai thdi diem hipn tai la Cong ty Co phan "Rudoavtomatika" Phan Idn cac NKU dyoc thiet ke cho he thong G-D, nhung dong thdi Cong ty cung tfch eye tien hanh eae nghien ciru khoa hpc nham tim eae hp thong tien tien han thay the cho he thong G-D cu - Giai phap d§ xuSt Ca sa phan tfch hieu qua SLf dung nang lyp-ng cua cac he thong dieu khien truyen dpng dipn khac (hinh 1) cho phep chung ta khang djnh sy can thiet phai thay the hp thong gia c6i G-D bang he th6ng Bp bien doi dien dung Thyristor - Dpng ca (TP-D) Mpt nhOng ly quyet djnh cho sy thay the la cac dpng ca dien mpt chieu thiet ke chuyen cho may xuc da cang bien rpng rai cung nhy sy dap irng eua eae ca sd su'a chua, bao KHCNM SO 4/2011* CO DIEN - Tl/DONG HOA MO duang chung Ngoai ra, su- dung bp Ipc bu (FKU) de bii cong suat phan khang, he thong ed he so hieu qua sii' dung nang luong cao nhit (hinh 1) Chung ta cung biet rang gia trj dieu chinh cac ca cau chinh cua may xuc dao dpng khoang 0=2-5-3 Tren thi ta thay ro rang he thong nhat vuot trpi he thong co dien Dpng ca dong bp-May phat-Dpng ca mpt chieu (SDG-D) ve ehl sd hieu qua sir dung nang luang la he thong TP-D c6^ Ipc-bu FKU Xet ve chi phi tong the thi ca hai he thong SD-G-D va TP-D cd chi phi gan nhu va dd la dieu kien de dinh hudng nghien ciru ap dung he thong TP-D cd FKU He thong Dpng ca khdng dong bp-May phat-Dpng ca mpt chieu (AD-G-D) duae sii' dung tren may xiic EKG-4,6 (5) Sa nguyen ly he thong cung cap dien hipn tai cua may xuc EKG-4,6 (5) nhu tren hinh Nha may san xuat may mdc hang n|ng Ural da xuat xudng han 13 nghin chiec va chi rieng cac md vung Kuzbass da ed tdi 249 chiec EKG-4,6 (5) dang Thong tin khoa hpc cong nghe m o hoat dong Vi vay, he thong mdi duae Cdng ty "Rudoavtomatika" dua vao ap dung phuc vu cho vipc hipn dai hoa cac may xiic thupe ddng Vao quy III nam 2008 Cdng ty "Rudoavtomatika" da lap dat bp dieu khien ap trpn bp (NKU) mdi nhat theo he thong TP-D cho may xuc eua phan xudng v | n tai dydng sat nha may tuyen quang Stoilensk (thanh Stary Oskol, viing 1-He thdng dung Tiristor-Ddng ca (TP-D) cd bd loc-bu (FKU); Bengorod) Sa nguyen ly 2-He thong Dgng ca ddng bd-M^y phit-Dong ca (SD-G-D); mach cap dien cho he thong 3-H$ thing Biin tin - Dgng ca klidng ddng bd (NTP-AD) cd bg Igc-bu TP-D may xiic EKG-5 dung (KFU); 4-He thing Ddng ca khdng ding bd-M^y ph^t-Dgng ca (AD-Gtich gau xiic 5m^ the hipn tren D); 5-He thing Biin tin diing Transitor-Ddng ca (TrPT-D); 6-He thing hinh Biin tin dung Transitor-Dgng ca khdng ding bd (TrPT-AD) Trd ngai ca ban eua vipc Hinh Do thi tirang quan giira he so hieu qua su" dung nang cap la chenh lech trpng nang luveng va pham vi dieu chinh cua cac he thong lygng giu'a phan may mdc truyen dgng dien khac dugc thao dd (7780kg) va lap dgt (2680kg) tren san may xuc, ddi hdi phai lap dat them doi trpng bii phan chenh lech Doi trpng ed the diing each dat mpt khoi nang gan 5000kg C01 hoac dydi dang cac khoi rieng bipt ed ciing tong trpng lygng KT S Q dat tai cac vj tri thiet bi dugc thao da Cac chuyen gia md Stoilensk da nghien ciru che tao khoi doi trpng ed cau true la mpt tam kim loai day 80mm Bp bien doi dien diing 'Ml 11 [] [1[][] Thyristor su' dung s a cau * OB BDC DN DQ2 DQ1 BG ctvSu sdng Idm vISc gom cac cap Thyristor lap noi -220V sCfa diija ' ' '^''" tiep Thanh phan chinh bp bien doi la cac Thyristor MT3-800-18 Thyristor dap irng ddng lam viec can thiet cho cac dpng ca hp thong De dieu khien cac bp Bam nil6c, bom dju, qu^t bien doi ngudi ta lap trinh DN- Dgng ca ca ciu nSng - Ha giu; DD- Ddng ca ca ciu diy tay dieu khien de tao dugc cac g^u; DQ1,DQ2- C^c dgng ca ca ciu quay DDC- Ddng ca ca ciu di thdng so can thiet cua xung chuyin DG- Ddng ca ca ciu ddng md giu dieu khien md cac Thyristor Hinh Sado cung cip dien hien tai cua may xuc EKG-4,6(5) Mpt nhu'ng che dp lam vipc nguy hiem nhat eua che dp tdi hgn cua bien tan, khang trcng trudng hgp mat he thong TP-D tren may xuc la xuat hien tai cd tinh cam xung dieu khien hoac mat dipn •ffiiZ5H 10 i&rR fpfflfflfll KHCNM S6 4/2011* CO D1$N - TlJ DONG HOA MO Thong tin khoa hoc cong nghe mo gia tri ddng bao ve dat trudc cho may cat ty dpng se dien qua trinh ngan qua ddng va ham dpng ca nhd dien trd sun Di chuyen Tp-p- Biin ap TM3-400; TK- Kho^ ngit Tiristor; THI- Tn4-Bd biin dii dien dung Tiristor; QF1-QF5-May cit tu ddng bao ve ngin mach bo biin dii ;QF6-QF9-May cit tu dong bao ve qua ddng ddng ca; R1-R4-Dien trd bao ve; H-Dong co nang giu/:]li3-82; H.X-Ddng ca vao giu va di chuyin nn3-52; B1,B2-ddng ca quayJinB-52; KMS, KMP-Khdi ddng tCr chuyin dii quay-di chuyin Hinh Sa nguyen iy cung cip dien cho co gdp cac dgng ca theo he thong TP-D cua may xiic EKG-5 Hinh Do thi qua trinh bao ve che tdi han cua bien tan nguon bien tan dang lam viec Hien tugng qua ddng se lam hong cac van ban d i n va tao ho quang dpng ca dien d i n den hu hong nang may moc De khac phuc hien tugng tren, ngudi ta su dung cac may eat ty dpng va dien trd sun Khi xay hien tugng qua d6ng_trong dpng ca, may cat se ngat dien dpng co dong thdi dien trd sun dugc ddng vao mach dpng ca thi sy CO qua dong the hien tren hinh Tren d6 thj, chiing ta thiy rang ddng dpng co dat tdi KHCNM s o 4/2011* CO DifiN - TITDONG HOA MO De dieu khiln cho bp biln doi ngudi ta sir dung he thing dieu khiln phu thupe theo toa dp (hinh 5), dd cac ky hieu: 33H-Bp phan dat e h l dp lam viec phu thuoc hai bac, tao quy luat thay d i i van toe; flT-Cam biln ddng dien; flHCam biln dien ap; PH-Oilu chinh dien ap; PT-Oieu chinh ddng dipn; K-Khoa dua ve che dp mac dinh; PH dugc chpn theo quy luat ty le thuan, eon PT dugc chpn theo quy luat ty le thuan-vi phan (FlU) ntiam loai bd I6i dilu chinh ddng dien Ket qua chiing ta cd dugc thi dae tinh ca dien cua cac ddng co chinh may xiie nhu tren hinh Viec irng dung 33H lam tang kha nang van hanh cac dpng ca dien va cho phep thoa man t i t ca cac yeu c i u neu tren cua he thing truyin dpng cung nhu dap irng cac yeu c i u bao ve Nhd ed bo 33M, ddng thdi tdc dp dap irng nhanh cua bp biln ddi ban d i n chung ta tranh dugc cac qua tai co hpc khong mong muon cho may xuc Thang 09 nam 2008, nhdm chuyen gia cua Cdng ty "Rudoavtomatika" va Nha may TuyIn quang Stoilensk da tiin hanh lap rap bp d i l u khiln ap trpn bd theo he thong TP-D cho may xiic EKG-5 so 15 cua Nha may Trong qua trinh van hanh thir nghiem vdng 02 thang, may xuc da xuc dugc 300 nghin t i n quang len cac xe van tai va toa tau, dd Thong tin khoa hpc cong nghe mo 'V K • " K-1 3311 PH - < ^ — O •L^r - ' I I I Tn PT ilT /i" Naog A L^ Anon CTon Do thj ddng dien tieu thu ciing mpt d i l u kipn nhu tren nhung eiia hp thong TP-D tren hinh 7, 6, chung ta nhan thiy ddng dipn giam dang ke Nlu liy gia tri ddng dien trung binh mpt chu ky xiie cua hp thong MU-G-D bang thi ehl so cua hp thong TP-D vdi FKU se la 0,68 Ngoai ra, qua trinh hipu chfnh cung da ghi lai thj gia trj ddng dipn khdng cd FKU (hinh B) Nhu chung ta thay, ddng dipn trudng hgp tang len khdng chf so vdi c6 FKU ma ca vdi hp thong MU-G-D va cd gia trj 1,19 lan Idn han Dieu mpt lan nua khang djnh tinh hipu qua sCr dgng hp thong TP-D ed bp Ipc-bu FKU De so sanh thyc te suit tieu thy dipn nang tren t i n quang boc xuc cua cac hp thong khac nhau, da tien hanh d i m vdi hai may xuc EKG- h ^CTon Hinh Dac tinh cadien cua cac dgng ca chinh may xiic Hinh Cau triic /)# thong dieu khien bg bien doi dgng ca tuin d i u tien may da lam viec lien tue khong nghi, xuc dugc 120 nghin t i n quang Trudc cai tao lai, may xiic su' dung hp thong d i n ddng dien theo sa MU-G-D (MUkhulch dai tir) Do thj bien thien eua ddng dien cudn sa c i p may biln ap nguon mpt chu ky lam viec eua may xuc the hipn tren hinh a Quay Ra vko gau so 15 (trang bj hp thong mdi TP-D) va so 17 (vdi he thong cu MU-G-D) Thir nghiem tien hanh nhyng dieu kien hoan toan giong Theo k i t qua thong ke thu dugc hai 16 va 17 thang 11 nam 2008 may xuc s6 15 da boc xiie dugc 8018,5 t i n quang, tieu thy 566kWh Cdn may xuc so 17 mdt 01 thang 11 nam 2008 tir 8h00 d i n 15h00 da boc xuc dugc 4290 t i n quang, tieu thy 576kWh Nhu vay suit tieu hao dipn nang cua may xuc hp TP-D la 0,0706kWh/t, cdn may xiie he G-D tuang irng la 0,1343kWh/t, nghTa la Idn han 1,9 l i n Dieu khang djnh uu the cua he thong TP-D cho may xiie EKG-5 so vdi he thong bien trudc day AGG-D Ket qua thyc te so sanh suit tieu thy g i n day nhit thu dugc tai Cong ty Co phan "Dolomit" (thanh Dankov viing Lipetsk) Trong khoang thdi gian tir 03.08.2010 den 20.08.2010 tai day chuyen so cua md quang Bigildin, nhdm chuyen a-H$ thing MU-G-D; 6-H$ thing TP-D cd FKU; e-H$ thingTP-D khdng cd FKU Hinh Do thj ddng di$n phia cao ip cua miy bien ap nguon KHCNM SO 4/2011* CO DIEN - TIT DONG HOA MO Thong tin khoa hoc cong nghe mo gia da thy nghiem vdi may xiic EKG-5A trang bj he thong TP-D vdi FKU va 04 may xuc lugng dien nang tilt kiem dugc mpt nam, n l u Chung ta tiin hanh cai tao he thilt bi d i u t u khoang 200.000USO tuong duong^4 ty dong Thdi gian hoan von Bang Dien nang tieu thu cua 04 may xiic EKG-5A Cdng ty than Niii Beo Pu,(kW) Suit tieu hao dien nang (kWh/m') San lu'O'ng bdc xuc (m'/nam) Dien nang tieu thu (kWh/nam) May xuc EKG-5A so 293,06 0,59 1.003.854 589.587 May xuc EKG-5A so 296,46 0,60 883.047 530.253 May xuc EKG-5A so 297,16 0,60 1.137.253 678.414 May xuc EKG-5A so 293,30 0,61 1.142.054 699.526 May xiic EKG-4,6 t h i he cu G-0 K i t qua thu dugc suit tieu hao dien nang eua may xiic he TPD bang 0,233kWh/t, edn may xiie hp G-D la 0,459kWh/t cao g i p 1,97 lin Ngoai ra, thdng so thu dugc cho thiy coscp trung binh cua he thong TP-D vdi FKU (0,95-^0,96) cao g i p 1,6 lin so vdi he thong G-0 (0,55-0,65) - Hieu qua kinh t§ De danh gia hieu qua kinh t l giai phap de xuit tai d i l u kien thyc te Viet Nam, chung ta dua tren "Bao cao k i t qua kilm toan dien nang Cong ty Co phan than Nui Beo nam 2010" Theo so lieu bao cao, sau phan tich k i t qua va can cir tren san lugng b l e xiie cua tirng may xuc EKG 5A so 1-^4 dugc khao sat, chiing ta tinh dugc dien nang tieu thu nam tuong irng cho tirng may xiie (bang 1) Theo bang 1, dien nang tieu thy trung binh cua mpt may xuc mpt nam la 624.445kWh Tong chi phi cho viec bao dudng thudng xuyen, djnh ky cho mot may xuc EKG 4,6 (5) khoang 1,8 ty ding/nam Can cir cac so lieu tinh toan dae neu tren thong truyin dpng dien cu G0 TP-D vdi FKU (mire tilt giam khoang 1,9 l i n , tuang duang mire tilt kiem 47,37%) wac tinh khoang: 624.445kWh x 47,37% = 295.800kWh Tinh vdi mire gia dien trung binh 1033d/kWh tiin dien tilt kiem mpt nam tuang irng: 295.800kWh x1033d/kWh = 305.561.400d So lugng eae thilt bi tnjyen dpng dien cong suit Idn giam mpt nira (loai bo 01 dpng ca lai may phat va 04 may phat tren tdng so 10 thilt bj cong suit Idn cua may xiie) Chi phi cho sua chij'a bao dudng he thong truyin dpng dien theo thong ke sa bp thuc t l chiem khoang 25+30% tong chi phi bao dudng stra chua, tuong duong mire tilt kiem 500 trieu ddng/nam Tong so tien tilt kiem cho giai phap khoang 806 trieu dong/nam Ngoai ra, s6 thilt bj thao dd khdi he thong dang van hanh binh thudng ed t h i sir dung lam vat tu thay the cho eae may xuc khae chua qua cai tao Nhu vay lugng tien tilt kiem cho giai phap edn dugc cdng them gia tri ly cua cac dpng ca, may phat, tu dien va eae thilt bj di kem Dy kiln gia KHCNIM SO 4/2011* CO DIEN - T U D O N G HOA MO tuang irng 2,49 nam, vdi mire khiu hao thilt bj nam./ Tai lieu tham khao CacJjoujUH B.B., MUKHMeHKO A.f{ n flp 3neKTponpnBOfl aKCKaeaiopa 3Kr-5 no cucieMe Tfl-fl nponsBOflCTBa GAG "PyAoaBTOMarnKa" fopHoe odopyKflosaHne v\ sneKipoMexaHUKa, N24, 2009r MuKuneHKO A.?l n flp PaapadoTKM GAG "PyfloaBTOMarnKa" B odnacru nepeneKTHBHbix cuereM 3KCKaBaT0pHblX npHBOAOB PopHoe oSopyKflOBaHne n sneKTpoMexaHUKa, N26, 2008r ropHO3 CrotineHCKuPi odoroTurenbHbiti KOMdnHar riMCbMO TeH flupeKTopy OAO "PyAoaBTOMaiMKa", 25.11.2008r OAO "PyAoaBTOMaTMKa" AKT cpaBHMTenbHbix aaiviepax 3HepronoTpe6neHM;i aKCKaBaiopaMn 3Kr-5a(4,6), odopyAOBaHHbiMM cuereMaMn Tn-fl c OKY M r-fl, 24.08.201 Or Bao cao k i t qua kilm toan dien nang Cdng ty CP than Nui Beo - Vinacomin 2010 Vien KHCNMd Vinacomin ... nam tuong irng cho tirng may xiie (bang 1) Theo bang 1, dien nang tieu thy trung binh cua mpt may xuc mpt nam la 624.445kWh Tong chi phi cho viec bao dudng thudng xuyen, djnh ky cho mot may xuc... mong muon cho may xuc Thang 09 nam 2008, nhdm chuyen gia cua Cdng ty "Rudoavtomatika" va Nha may TuyIn quang Stoilensk da tiin hanh lap rap bp d i l u khiln ap trpn bd theo he thong TP-D cho may... ap dung phuc vu cho vipc hipn dai hoa cac may xiic thupe ddng Vao quy III nam 2008 Cdng ty "Rudoavtomatika" da lap dat bp dieu khien ap trpn bp (NKU) mdi nhat theo he thong TP-D cho may xuc eua