CHAY RA
CHAY RA
1. Muc Dich Chay Ra
+ Khai niem: Chay ra la quang duong hay khoang thoi gian su dung chi tiet tinh tu khi bat dau lap giap,den khi be mat cua chi tiet nhan bong tao duoc cap chi tiet tiep xuc co loi nhat.
+Phan loai: 3 giai doan
-Ra nguoi, ra nong, ra su dung
+Tac dung cua chay ra:
San phang cac nhap nho be mat chi tiet dam bao cho khe ho cap chi tiet co loi nhat de tang tuoi ben su dung cua cap chi tiet.
Phat hien ra hu hong, sai lech do che tao, va do lap rap de kip thoi xu ly truoc khi dua vao lam viec.
2. Cac giai doan chay ra
a. Chay ra nguoi
-Dung dong luc ben ngoai keo de bat cac cap chi tiet phai lam viec tao ra choc ac mat tiep xuc co loi kip thoi phat hien sai sot khi lap ghep de kip thoi khac phuc.
-Ra nguoi khong tai
-Ra nguoi co tai mot so chi tiet
b. Chay ra nong( ap dung cho dong co)
-Cho dong co tu no may lam viec trong khoang thoi gian quy dinh. Sau do do chi tieu kinh te ky thuat cua dong co (Do Ne, Me, ge). De kip thoi phat hien cac sai sot nham khac phuc yeu cau nha che tao.
Thong so ne, nhiet do,tai trong.
c. Chay ra su dung(Thuc hen cho ng sd)
-Tinh tu km dau tien den khi xe su dung den so km quy dinh (thuong 2k-4k km)
+Cac bien phap ky thuat su dung oto khi chay ra su dung:
-Doi voi dong co:
Duoi 500km dau tien thay dau 1 lan.
Sau 1500km thay dau lan 2 dong thoi bao duong loc dau
Khi moi khoi dong lan dau tien trong ngay nene de dong co chay cam chung khoang 1 phut.
-Oto:
-Van toc V=2/3 Vmax o moi tay so.
-Trong tai 80%.
-Khong phanh dot ngot, ko keo mooc, khong khoi hanh lien tuc, tien hanh kiem tra dinh ky cac khe ho theo dung yeu cau bao duong KT. Xiet chat cac moi ren theo cac moi ghep ren theo dung quy dinh.
Cuoi thoi ky chay ra phai kiem tra lai tat ca cac bo phan. Doi voi dong co kiem tra ca bu long bien, bu long truc chinh, khuyu.
+tu 2000-4000km van tiep tuc chay ra
+Den 4000km thi het thoi ky chay ra.
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