Nghiên cứu thực nghiệm xác định một số thông số động lực học của liên hợp máy kéo shibaura 3000a với rơ mooc một trục

NGHIEN cuu - TRAO DOI NGHIEN CL L THtC NGHIEM XAC DINH MOT SO THONG s o DONG LLC HOC CUA LIEN HQfP M\\ KEO SHIBALR-A 3000A Vpl RO MOOC MOT TRUC EXPERIMEKT.AL INXESTIGATION ON DETERMINING PARAMETERS OF SEMI-ONE AXLE - TRAILER TRACTOR SHIBAURA 3000A Tran \'an Tung Tniang Dai hgc Lam nghiep TOM T \ I Md men xodn tren bdn true chii dgng, phdn luc phdp tuyen len cdu truac mdy keo, cimg he sd c an ciia lap chii ddng vd gia tdc Id nhimg yen to dnh hudng tdi dgng lire hgc dgc ciia lien hgp mdy qud trinh ldm viec Bdi bdg Irinh bdy phuang phdp nghien ciru thuc nghiem de xdc dinh ddng thai md men xodn Iren bdn tnic chii ddng phdn luc phdp tuyen len cdu trudc mdy keo cimg, h^ sd cdn ciia bdnh chii dgng vd gia tdc ciia lien hgp mdy qud trinh ldm viec Tir dd, ldm thong so ddu vdo cho md hinh linh todn ly ihuyel vd Id tdi lieu kiem chimg cho kdl qud nghien cim ly Ihuyel lighten cim ddng luc hgc dgc ciia lien hgp mdy Tir khoa: Lien hgp mdy, dgng luc hgc ABSTRAC r hull torque on the semi-axle, normal forces on Ihe tractor's front axle, stiffness of driving wheel toward tangent direction, drag coefficient of driving tire and acceleration arc the factors allccling Ihe vertical dynamics of Semi - one axle - trailer Tractor This paper presents emperimental reseanh methods lo determine torques on the semi-axle normal forces on the tractor s front axle, stiffness of driving wheel toward tangent direction, drag coefficient of driving tire and acceleration of Semi - one axle - trailer Tractor when working This creates input parameters for modeling and theoretical investigation and dociimeni proofing vertical dynamic theoretical results Ke\Mords: Semi-trailer Tractor Dynamics ISSN 0866 - 7056 TAP CHi CO KHI VIET NAM, S6 nam 2016 »-»».cokhivictnain.vn iNUtiitiN ULTU - I r v \ u t/UI l D A T \ A N DE Vdi mue dich nghien cihi ddng ILTC hoc doc lien hop may keo bdn banh vdi mode mpt true van chuyen gd tren dudng lam nghiep, bai bao trinh bay ndi dung nghien cdu thirc nghiem vdi npi dung CO ban sau: Xac djnh md men xoan tren ban true chu ddng, dp cung va he sd can theo phuang tiep tuyen cua Idp chu ddng lam thdng sd dau vao phuc vu bai toan ly thuyet nghien cuu dpng luc hpc dpc cua lien hap may Tien hanh nghien cuu thuc nghiem de kiem chung ket qua mo hinh nghien cuu ly thuyet nhu: Phan luc phap tuyen len cau trudc may keo lam viec; gia tdc ciia may keo va mode mode theo phuang chuyen dpng, ta gan cam bien gia tdc tieu chuan Kisler (hinh 01) va B12 1000 (hinh 2) vao vi tri phii hop cua may keo va ro mode Su dung thiet bi thu thap va khuech dai thdng tin ludng DMC Plus ket ndi may tinh cd sir dung phan mem dieu khien DMC Labplus de va thu thap sd lieu De thuc hien dupc nhihig ndi dung neu tren, bai bao trinh bay phuang phap nghien cuu xac dinh cac dai lupng khdng di?n bang dien sir dung cac cam bien tieu chuan va mot sd cam bien phi tieu chuan Su dyng thiet bi la thiet bj thu thap, khuech dai thdng tin ludng nhieu kenh DMC Plus ket ndi vdi may tinh dieu khien bSng phan mem DMC Labplus Ddi vdi may keo va mode, tien hanh nghien cuu thuc nghidm hai trudng hop khdng cd khdp ndi dan hoi va cd bd tri khdp ndi dan hdi P H l O N ( ; PHAP T H I C NGHIEM NCHIKN (LU 2.1 Phurffng p h i p xac dinh gia toe theo phuffng chuyen d^ng cua ma\ keo \a rat mode D^ \ac dinh gia tdc cua may keo \a Hinh Cdm biin gia K'K B 12/1000 2.2 Phinrag phap xac dinh mo men xo^n tren ban true chu dpng may keo De md men xoin tren ban tryc chii ddng ciia may keo, chiing tdi tien hanh thiet ke ehep hinh ban true chii dpng ciia may keo dan eac la ten ro dien trd len ban tryc chii ddng dau ndi cac la ten zd theo sa dd cau du dien trd [ I ] (hinh 3) Sir dung phuang phap lay ddng phii hgp de ket ndi vdi bp thu "^ ISSN 0866 - 7056 TAP CHf CO KHf VI$T NAM Sd nam 2016 www.cokhivietnam.vn NGHIEN CL>U - T R A D I _ thap k h u k h dai thdng tin ludng DMC Plus Cac la ten rd dien trd dupc bd tri cho cac true doc eua la dien trd nghieng vdi dudng sinh ciia true mdt gde 45 dp, hai dien u-d k^ tidp tao vdi mot gde 90 dp, bdn la dien trd phan bd deu mdt chu vi dudng trdn ban tryc tai \ i tri can [2] Tiin hanh hieu chuan khau bang phucmg phap so sanh giua gia tri md men xoan tinh toan ly thuyet vdi gia tri md men xodn dupc bang khau tu tao Cu the, la tao md men xoin cho ban true nhd lyc \ a canh tay ddn da biet (hinh 4} Tir khdi lupng cLia v^t nang, khoang each canh tay ddn ta cd the tinh loan dupc md men xoan tren ban tryc Ket ndi khau vdi thiet bi DMC Plus va may tinh, tien hanh \ a hieu chuan bang each thay ddi he sd thich img (adaptation) de gia tn dupc phu hop vdi gia trj tinh toan Hinh Sa hieu chudn khdu md men xoan 2.3 Phucmg p h i p xAc dinh phan lire p h i p tuyen len cau t r v d c m i y keo De phan lyc phap tuyen ciia m$t dudng len cau trudc ciia may keo, chiing tdi tien hanh dan dien trd tenzo len vd cau trudc ciia may keo, dau ndi cac la ten rd di?n trd theo sa dd cau du di^n trd (hinh 5) Cau dii dien trd dupc ndi vdi thiet bj thu th^p va khuech dgi thdng tin ludng DMC Plus ndi ghep may tinh Hinh Sa dd mgch va phuang pi idp ddn ten rd dien trd len vd cdu Hinh Sa mgch vd bdn tnic chii dpng sau ddn len rd dien tra Sau bd tri so dd do, ta dau noi khau vdi thiet bi DMC Plus va may tinh rdi tien hanh hi?u chuan khau De hi?u chuan khau do, chung toi tien hanh d$t toan bp banh xe may keo len cam bien lyc tieu chuan (hinh 6) Khi dd, gia tri phan lyc phap tuyen tir mat dat len banh xe dupc xic dinh thdng qua cam bien lyc tieu chuan Tien ISSN 0866 - 7056 TAP CHf CO KHi V I £ T NAM, S6 nim w^Tv.cokhi\ietnam.vn 2016 NGHIEN c u u - T R A O 001 hanh dieu ehinh gia tri he sd thich ung (adaptation) de dd thj ciia cam bien tieu chuan triing \ dl dd thj cua khau cimg ciia Idp theo phucmg tiep tuyen; P - Tai trpng tac dung Bang each giai phuang trinh (1) \di cac sd lieu thuc nghiem dupc xac dinh tir dd thj dao ddng tat dan cua ban trupt, ta cd dupc gia tri dp cung va he so can ciia lop chii dpng ina\ keo Hmh Sa bd iri hieu chudn khdu • t) May keo 2f Cdu truac mav keo co ddn cdc Id difti tra, i) Tdm dpn: 4/ Dau luc tieu chudn, 5) Thiel b( thu thdp i a khuech dai thdng tin ludng 6) May tinh 2.4 Xic dinh he so cung vi he so can cua lop xe chu dpng theo phuong tiep tuyen De xac djnh dp cimg va he sd can banh xe chu dpng ciia may keo, chiing tdi bd tri so dd thi nghidm nhu nhu hinh Hinh Sa xdc dinh he sd cung vd he sd Bang each tao lyc thang dung P, bang vdi trpng lupng may keo dat len banh xe tac dyng luc P^ len ban trupt tha cho ban trupt dao ddng tu quanh vj tri can bang Xac dinh dao ddng tat dan ciia ban trupt bang dau dich chuyen \di bp thu thap, khuech dai thdng tin DMC Plus ket ndi may tinh Xac djnh sd chu ky khdi lupng ban trupt ta se xac dinh dupc he sd can ciia lop nhu sau: - Phuang trinh dao dpng ciia ban trupt: m^V., +'t>.v,,+c,,\., =P cdn lop mdy keo: I) Bdnh chu dpng cua may keo, 2) Thanh tru^rl dung 3) Gid dd thaTih rrvtiT dung 4i Bdn Iru0 ngang 5) Con Idn 6) Cam hien dfch chm'en 7) Thiet hi thu ihdp khuech dgi tin hifu lutmg, 8) Md\ link co phdn mem D MC 'abplus KET QL \ NGHIEN CI U Tien hanh thi nghiem chat dii tai cho mode (3.000 kg) tren doan dudng cd dp ddc 10 dp hai trudng hpp khdng cd khdp ndi dan hdi va cd khdp ndi dan hdi giira may keo \a ro mode Sau ti§n hanh thi nghiem, sir dyng phan mem DMC Labpus de xuat du lieu dang file *.asc ta dupc kit qua thi nghiem nhu sau: (1) Trong dd: \^, la djch chuyen ciia ban trupt: m^ - Khdi luong ban trupt; k,^ - He sd can cua Idp theo phuang tiep tuyen; c,^- Dp 3.1 Ket qua mo men xoin len bin true chu dpng Tien hanh hi?u chuan khau va do'^ ISSN 6 - TAP CHI CO KHf VIET NAM, Sd nam 2016 ww^.cokhivietnam.vn NGHIEN CU'U - TRAO D | gia tri md men xoin ciia ban true chii ddng tren thyc nghiem chiing tdi thu dupc mdt sd ket qua nhu sau: - Gia trj hieu chuan khau md men xoan: Khi tien hanh hieu chuan vdi gia trj he sd thich ung la 625 KNm tuang ung vdi mmv/\ gia tri tinh toan ly thuyet triing khdp vdi gia trj thuc nghi?m 3.2 Ket qua xic djnh cung \a h| so can ciia lop binh xe chu dpng Tien hanh thi nghiem xac djnh dp cung va he so can ciia Idp banh xe chii dpng ta dupc thj bieu dien djch chuyen ciia ban truprt theo thai gian nhu hinh 10 - Gia tri md men xoan tren ban tryc chii ddng trudng hop lien hop may khong cd khdp ndi dan hdi dupc the hien d hinh Mo men atun trin bin Inic chu dor« Uk Hinh 10 Dd ihi dao dpng tdt ddn cua bdn inrpt thi nghidm xdc dinh dp cung vd h? sd cdn cua Idp mdy keo Tien hanh tinh toan dp cung va h? so can ta dupc: A,, =38.912; c,^ =148.471 Hinh