Thông tin tài liệu
NGHIEN cuu-TRAODOI Ap dung tieu chuan iso 1940-1:2003 |E| kiem tra va danh gia cliat luong cum true cac dang to tai che tao nudc (*) TS NGUYEN THANH QUANG ThS DO GIAO TIEN TOM TAT: Tieu chuan ISO 1940-1:2003 (E) 6Ua cac yeu cau ve chat lUOng can bang doi v6i cacrotocLfng lam viec trang thai on dinh.Tieu chuan da du'dc sCrdung lam ccfsd cho viec thiet ke cac thie't bi can bang dang 6uac sCf dijng nhieu Imh vu'c cong nghiep nhu che tao canh quat, ro to, tuoc bin, true truyen dong Bai bao trinh bay viec ap dung tieu chuan ISO 1940-1:2003 (E) decan bang cum true cac dang tren thiet bj can bang ro to che tao nu'dc Md DAU Trong khudn khd iing dung ket qua nghien ciiu khoa hpc cdng nghe vao thue tien san xuat, nhdm can bd ky' thuat thudc Cdng t\' COLOAMEC - Bd Cdng thuong, da thuc hien de tai nghien cim KHCN '^Nghien ciru thiet ke va cdng nghe ehe tao cum true cac dang truyen lire cua xe tai dudi tan nang cao nang luc ndi dia hoa phu timg dtd", thue hien nam 2009 Nhdm de tai da sti dung cac ky thuat nghien ciiu khoa hpe de thiet ke, lira chpn vat lieu che tao, nghien ciiu tao phdi, gia cdng co ehinh xac, lap rap hoan chinh va kiem tra ky thuat Dd mat can bang ddng la mpt nhiing chi tieu danh gia chat lupng che tao cua cum true cac dang Bai bao trinh bay ket qua nghien cuu viec ap dung tieu chuan ISO 1940-1: 2003 (E) de can bang ddng cum tnre eae dang va danh gia chat lupng san pham che tao tai dan vi san xuat - Dgi luang mdt cdn bdng cua true cdc ddng: Khi ed mdt khdi luong u d each true quay cira true eae dang mdt khoang r thi dai lugng luang mat can bang cua true cac dang la: {\)d = u? Trong dd: Vec to r cd gde la true quay va dinh la tam khdi luang u mat phang vudng gde vai dudng tam - Liec qudn tinh ly tdm: Khi true quay vdi van toe gde CO thi khdi luong u each true quay mdt khoang r se sinh lire quan tinh ly tam cho bdi cdng thiic: (2) F = uco'r - Cdn chinh mdt cdn bdng: La qua trinh thay doi phan bd lai khdi lupng cua true cac dang bang each them hoac bdt khdi lupng de lupng mat can b5ng bSng khdng: Trong dd: u^ la khdi luang them vao hoae bdt di, r la ban kinh tinh tir tam khoi luang u den true quay eua true eae dang mat phing vudng goc vdi true quay CO SO LY THUYET CAN BANG DONG TRUC CAC DANG 2.1 Cdc dinh nghia Theo eae tai lieu co sd ta su dung cac dinh nghia ve can bang true cac dang gdm: (*) Cdng ty COLOAMEC - Bd Cdng thuong Can Cli vao cau tao cua true cae dang, khoi luang them vao hoac bdt di cd the lay d nhieu vi tri, eho tdng hop lai thda man dieu kien (3) De can bang true cac dang, tir thuc nghiem, ngudi ta thudng can bang tren mat phang Tren true eae dang co TAP CHI c a KHi VIET NAM V So - Thang nam 2011 NGHIEN CUU - TRAO OOI the dupe chia lam nhieu dia mdng vudng gde vdi dudng true Mdi dia mat can bSng duoc xac dinh bang mdt vec to f/ Vec ta f/ cd the phan tich vee to tren hai mat phang tiiy y (I va II) vudng gde vdi dudng true (Thudng dupe ehpn la cac mat phang d hai dau cua true cae dang) Khi cae lire ly tam F^ va f^^ eiia khdi lupng mat can bang da dupc phan tich ve mat phang I va II thi tren timg mat phang, cae phan lire ddng quy va tdng hop lai dupe hpp luc tren timg mat phang Cac luong mat can bang U^ va (^ dupc tinh nhu sau: tS^gp' (4)i^; g, tam Clia true eae dang; M la khdi lupng true cae dang va m la khoi luong mat can bang (gia thiet m « M ) Gia su, hai dau miit ciia true cac dang rat gan gdi dd Trpng tam G ctia true cac dang each hai gdi dd la 1^ va Ij Gpi kj, k, la he sd dan hdi; c,, c^ la eae he sd can d hai gdi; x, cp la chuyen vi va gde quay ciia true cac dang quanh trpng tam G; x^, x, la ehuyen vi d hai miit dau true cae dang Su dung phuang trinh Lagrange II de thiet lap phuang trinh ehuyen ddng ddi vdi hai he tpa dp suy rdng (x, cp) hoac (x x,): 1=1 b b ±1 ry n p S„co'-> d„ = 1=1 p dT_\_dT_ (5) p Cac lupng mat can bang U, va u^^ duac gpi la eae mat can bang quy udc Ndi chung, ve lupng va goc thi cac vec to phu thudc vao vi tri cua cac mat phang can ehinh I va II Nhu vay, trang thai mat can bang cua true cac dang cd the md ta day dii bdi hai mat can bang quy udc hai mat phang ehpn y Theo tieu chuan ISO 1940-1: 2003 (E) can bSng dpng true cac dang bao gdm viee: - Kiem tra mdt cdn bdng dw Kiem tra lupng mat can bang du eua chi tiet quay xem cd nam gidi han eho phep hay khdng - Cdn bdng ddng: Neu lupng mat can bang du cua ehi tiet quay qua gidi han cho phep thi phai tien hanh can chinh phan phoi lai khdi luong de dua ve gidi han eho phep m Qn _ Trong dd: T la ddng nang ciia he, n la the nang cua he, Q _ la luc suy rdng va q_ la tpa dp suy rdng tucmg ling vdi cae tpa dd x va ^ hoae x^ va x,: 2 ""^ The nang dan hdi ciia Id xo: K-IJC-I (7) ^(^1,^2) "2-1-^1 ~r K-fJC-y (8);r{x,(p) = -k,{x-l^' dupc eho bdi phuang trinh (21), do, Q la van tde gde eiia rd to a tde dd lam viec cue dai: (21) e^erf^ = constant (b) Cac chi tiet gia cong cac dang Mdi quan he phucmg trinh (21) la eo sd phan loai cac cap dp chat lucmg can bang G dupc the hien ducii dang dd thi (hinh (a) va (b), dd, cap ehat • lupng G16 dupe ting dung de xac dinh cap chat lupng ddi vdi true cae dang, eae ehi tiet may ep may ndng nghiep, bam bim than, eae cum tdng rieng biet cua ddng ea eho d td, xe tai, dau may xe lua true khuyu ddng CO tu xi lanh trd len vdi nhiing \ eu eau dae biet (c) Lap rap cmn true Hinli 3: Cum true cac dang tlri^t ke va che tao nudc KIEM TRA TRUC CAC DANG 4.1 Gidi thieu tieu chu§n ISO 1940-1:2003 (E) Tieu chudn ISO 1940-1: 2003 (E) Mechanical Dd thi cho phep xac dinh cap chat lupng can bang theo lupng mat can bang du eho phep ^p« a toe dp lam \"iec 1cm nhat f:^ TAP CHi c a KHi VIET NAM < • So - Thang nam 2011 £ NGHIEN CUU - TRAO OOI \ N M 11 1 K T L 4= ! —r ^ ~- : ,:: ^ i ^ - -iiTlv '% Hlji!\i \ • ; M ill i ^ k % \ : ' ^-H1 0.1 T l-\ 0.05 ittzs ^^- H - i i 11 : ' '•KJ H, [ : rli \ -r1 i ' —u \ s 0.01 0.005 • i , : ; i • • ^ iS, \j N ! \ ' ' • ^ ! ! Ml 0.000050 i l >l r-y H-~ • 100 SOO 1000 100O0O 5000 [ M i; ' 20OO0 •; 10OO0 I—^ 200 1—' - Phan ghi tin hieu; - Phan mem thu nhan \a xu ly tin hieu Das} Lab 9.0; j - Phan mem can bang Balance - X3 cd nhiem \'u xu ly tin hieu duoc tir phan cirng tinh toan \ a chi lupng can bang can thiet • % ^ - rs ;ii;^ ^ • ' ,—i ^-i^t^ -H—1 TT' ^ s J^ - !,n\ ^ ^ \l T i4 J^^lli^ k ^~ s -H-rV; 'k sh;* c : V ff _j ^ '1' ' l\' :iv ! ' ! ' • ' ~ ' \ T i \ \ ^•1 * - • , ' \ ZOO 5O0 100C 20O0 \ III \ \ J^ 100 ! N \h- ]\ i^^ SOOQ 10OO0 20000 ' - Dudng kinh: D \l \ ' = 0.4 m; mm = 1.3 m D max *- '—'—~-^^ ^ ^ ^ 1J = m L ma.x - Khdi luona: m 4.1 - Chieu dai: L ^ - L ^ _.L!S Thiet bl NOVICO-BLO1 cd the can bing loai rd to dai (cd chieu dai ldn hon dudng kinh tdi thieu 1,5 lan) vdt cac thdng sd gidi han eua rd to nhu sau: ^ i > J ::;^ ^^-^ 50 - Phan tru} en ddng ca vdi ddng eo dan ddng pha (cdng suat 1.5 kW, n^^^ = 1450 \/p) \ a bien t4n dieu khien tdc dp: i>< \ "^\ ^ \ 30 100000 ^k "- H • "o X' K 100 50000 -j I %^ \ 500 10000 Thiet bi gdm phan ehinh: j J 1000 '•' 5000 2000 v r ^ \l ^-I \^ r •^o \ h 1"^ 50000 PT ' eiing da dupe dimg bien cac phan mem can bang rd to mpt hai hoac nhieu mat phang \ ^ 1 i \ "> ! ' ^T — i ^ x — i ^ v ^^ ; 0.0001 ' m.:iii —V— ! • H\\ rH| 0.0O1 0.0005 ^ k:!l \ " ^ L '• Can bang true cae dang la can bang cac khdi lupng lech tam chuyen dpng qua\' nham giam dupe cac rung ddng ya tai trpng tren cac khcip ndt Viee can bang dupe tign hanh theo tieu chuan ISO 1940-1:2003 (E) True eae dang dupe can bang mat phang yeu cau cap chat lupng can bang G16 Viee can bang ddng cum true cac dang dupc thuc hien phdng thi nghiem tren thiet bi can bang rd to dai NOVICO-BLOl Vien Co hpe Viet Nam nghien ciiu thiet ke \'a ehe tao \ i i[ 4.2 LTng dung ISO 1940 -1: 2003 (E) kiem tra true cac dang de tai ch8 tao = 0.04 m; mui = 1500 kg m max ^ = kg mm ^ 4.3 Can bang dong cum true cac dang che tao Idp dgt mic cdc ddng True cac dang can bang -[^ I 50000100000 (bl Hinh 4: Do thi luong mat can bang neng du cho phep phu thuoc vao cap chat lupng can bang G \'a toe dp qua> (Nguon ISO " 1940-1:2003) TAP CHi c a KHi VIET NAM V So - Thang nam 2011 Hinh 5: So Ihiet bi can bang true cac dana NOVICO-BLOl NGHIEN CUU - TRAO OOI Khi true cac dang chm en ddng qua\' thi lire quan tinh sinh mat can bing se tae dung lire len khung be thu khung rung dpng se lam eho la thep dan hdi rung ddng Hai eam bien chu>"en \i dupe gan Midng gde vdi mat phang la thep tai hai dau eua gia true cac dang de true tiep chuyen vi cua la thep nd rung ddng Cac cam bien duoc ket ndi vdi phan ciing, phan cimg dupe ket ndi vdi phan mem thu nhan va xii ly tin hieu DasyLab 9.0 cai dat tren ma\ tinh, va>', dii lieu ve gia tdc rung ddng va chuyen vi dupc thu nhan va xir ly tren ma> tinh thdng qua phan mem •' ^ # V x ' < ^^^ir^ t-!«w
Ngày đăng: 29/11/2022, 14:03
Xem thêm:
