T L / N C 5 H E N C U U D E N T R I E N K H A I - 5 A N X U A T
N G H I E N C V U T H I E T K E , C H E T A O M A Y S A N G KET HOP RUNG VA LAC THANG SLR - 3.000
ThS PHAM VAN TOAN TrUdng Dai hoc dan lap Lac Hong
ThS NGUYEN DUY PHU TrUdng Cao ding nghe sd 8, Bd Quoc phdng
PGS.TS TRAN TH| THANH TrUdng Dai hpc Nong lam Tp Hd Chi Minh May sang rung ke't htfp lie thang SLR - 3.000 dupe nghien cuu, thie't ke phuc vu cac day chuyen san xua't phan bdn hifu ctf vdi muc dich khac phuc nhu'ng ton tai cua sang rung trong qua trinh phan loai kich thuoc san pham nghien va san pham tao vien. SLR - 3.000 cd nguyen ly lam viec phdi htfp giffa rung va lie thing. Viec thie't ke sang rung lam viec o che do lie thing da nang cao dutfc hieu suat phan loai do khic phuc dupe hien tupng tao dong hay ldp day tren be mat sang rung.
Mo dau
May sang rung la thiet bi dupe dung kha phd bien trong nhieu nganh san xuat cdng nghiep de phan loai san pham dang bpt, hat va cue nhd. Hieu suat lam viec cua sang rung giam nhanh khi tren be mat sang cd sU hinh thanh nhUng khdi lupng tao thanh ddng hay ldp day, ngan can chuyen dpng tuong ddi cua hdn hpp vdi be mat ludi sang (nhat la dd'i vdi hdn hpp phan loai cd tinh dinh va tao mang nhu hdn hpp cac nguyen lieu san xuat phan bdn hUu co). Trong day chuyen cdng nghe san xuat phan bdn hUu co, hien tupng tao ddng hay ldp day tren be mat ludi sang ludn xua't hien khi lupng cung cap vao sang tang ddt ngot hay vat lieu bi dinh nhieu. Khac phuc tdn tai nay, nhom tac gia da de xuat nguyen ly sang rung lam viec P che dp lac thang.
Vat lieu va phuong phap nghien cuu
Cdu tao vd nguyen ly lam viec cua may SLR
Cau tao sang lac - rung gdm khung sang dat tren be may qua
cac Id xo (1). Chuyen dpng rung va lac cua khung sang dupe gay nen bdi cum khdi lupng lech tam (4) dat tren true sang quay (3), truyen dpng cho true sang quay thdng qua bp truyen dpng dai tii ddng CP (2). San pham sau khi
Cdu tao may SRL: 1. Lb xo; 2. Bong ca; 3. True sang va goi do; 4. Khdi lupng lech tam; 5. Ca cdu tay quay; 6. Cda thao lieu; 7. Ludi sdng; 8. Khung sdng;
9. Khung may
So thang 6.2011 K H" ? ? S < 3 C 5 1
T U N O H E N C U U D E N T R I E N K H A I - 5 A N X U A T
phan loai nam 0 dudi sang lay tii ciia thao lieu (6). Khung sang dirge che tao td thep tam dirge gap thanh hinh chd U.
Nguyen ly lam viec cua sang la khi true sang quay, khdi lirgng lech tam se tao ra dao ddng.
Dudi tac dung dan hoi cua 4 ld xo do lam khung sang dao ddng thang ddng. Ket hgp co cau tay quay lien ket khung sang vdi gia cd' dinh se lam khung sang cd chuyen ddng lac ngang (lac thang). NhiT vay, khi sang hoat ddng, khung sang vda cd chuyen ddng rung thee chieu thang ddng, vUa chuyen ddng lac ngang vdi tan sd bdng tan sd quay cua true sang. Chuyen ddng cua khung sang se lam cho khdi vat lieu tren be mat ludi chuyen ddng tuong ddi vdi be mat ludi sang.
Phdarng phdp nghien cdu Phuang phdp tinh todn thiet ke: Ap dung ly thuyet tinh toan sang rung va sang lac thang de xay dUng va xac dinh cac thdng so ddng lUc hoc cua may SLR cd nang suat phan loai san pham nghien (dang bpt) la 1.000 kg/h, san pham dang hat (dang vien) dd'i tugng phan loai la hdn hgp nguyen lieu san xuat phan bdn hdu co qua nghien nhd chua phan loai.
r.o nuai uuiiy
KHOA HOC 9 0 1 1
Phuong phdp che tao: Phan loai cac chi tiet cau thanh may SLR de tien hanh san xuat P dang quy md ddn chiec, phuc vu thuc nghiem ting dung.
Phuang phdp khao nghiem:
Ap dung phuong phap thdng ke thuc nghiem de thiet ke va xd ly sd lieu thUc nghiem.
Mot so ket qua chii yeu
TU nhdng nghien cUu, tinh tuan thiet ke, nhdm tac gia da che tao thanh cdng may sang phan loai SLR - 3.000 va tien hanh danh gia thUc nghiem. Ket qua cho cac chi tieu kinh te - ky thuat nhu sau:
Phan loai hon hop nguyen lieu san xuat phan bdn hdu ca sau khi nghien bdng may nghien bua khong co ludi sang: Kich thudc san pham thu hdi (dudi sang):
<3 mm; dp am nguyen lieu: 25 + 28%; nang suat: 1.250 - 1.350 kg/h; hieu suat phan loai: 91,2 + 93,5%; chi phi nang luong rieng:
1,560 1,719 kWh/ta'n.
Phan loai hon hop phan hdu co sau khi vo vien: Kich thudc san pham thu hdi (dudi sang):
<5 mm; nang suat: 3.100 + 3.350 kg/h; hieu suat phan loai: 95,7 * 96,4%; chi phi nang lupng rieng:
0,531 + 0,624 kWh/ta'n.
May SLR - 3.000 cd nhdng Uu diem noi bat la: Hdn hgp phan loai dugc rai deu tren be mat sang, lam tang kha nang chui qua sang cho cac phan tii du nhd; thich hpp cho phan loai san pham rdi; cd kha nang phan loai dupe cho cac hdn hpp cd tinh dinh cao nhu hdn hop nguyen lieu san xuat phan bdn.
Ket luan
May SLR - 3.000 la thie't bi dung de phan loai hon hpp san pham rdi theo kich thudc. Viec ket hpp ddng lUc hpc co cau rung dan hdi va dao dpng ngang thang cua he cP hpc true - dia lech tam - Id xo vUa rung, vUa dao dpng dang con lac da khac phuc cac tdn tai cua sang rung trong qua trinh phan loai cac ddi tupng cd tinh dinh cao, lugng cung cap vao sang cd che dp qua tai trong thdi gian ngdn. Giai phap cai tien gdp phan nang cao hieu qua cho cac day chuyen san xua't phan bdn hUu co •
Tai lieu tham khao
1. A.I. Xokolov, Ca sd thie't ke may sdn xuat thtfc pham, Nha xua't ban Khoa hpc va Ky thuat (dich tit nguyen ban tieng Nga, ngdcfi dich: Nguyln Trong The), 1976.
2. Nguyen Van Hiing, May vd thiet bi xay dtfng, Nha xuat ban Xay dung, 2001.
3. Nguyen NhU Nam, Tran Thi Thanh, May gia cdng ca hpc ndng sdn thtfc pham, Nha xua't ban Giao due, 2000.
4. Nguyen Van Vinh, Bong ltfc hpc may xay dtfng, Nha xuat ban Khoa hoc va Ky thuat, 2001.
