K^T Q U A NGHIEN CU'U MAY LIEN HOP T R O N G HOM SAN TS Ha Du-c Thai, KS Lu^i van Chidn Trwong Dai hoc Ndng nghiep Ha Ndi Hien khdu ldm dat trdng san bdng co gidi dang dugc dp dyng d nhieu vftng trdng san nguyen lieu tap trung Do khau trdng hom sdn van bang thu cdng nen van de ca gidi hda cdc khdu cham sde vd thu hoach khdng the tien hanh dugc ddng bd Mdt nhimg nhiem vy cua de tdi KC.07.07/06 - 10, thudc chuong trinh Khoa hpc cdng nghe trpng diem cap nhd nudc ddt Id phdi thiet kl dugc mdy lien hgp rach hang trdng hom sdn, bdn phan, dap ftng dugc yeu cdu ndng hpc, sft dyng ngudn ddng lyc san cd phd bien tai Viet Nam, tao dieu kien dp dyng dugc cdc mdy chdm sde vd thu hoach sdn, lien tdi thyc hien dugc CO gidi hda ddng bd qud trinh canh tac vd thu hoach san Nghien cftu cac may trdng hien cd trong, ngodi nudc, bdm sdt yeu cdu ky thudt trdng sdn vd nguyen ly ldm viec cua mdy trdng sdn chung tdi da lua chpn dugc so dd nguyen ly mdy trdng sdn nhu hinh Hinh Ban ve phdi canh toan may l-Cgm khung; 2-Cgm banh lip hang; 3-Cgm phan phoi hom; 4-Cym ehdn xdi; 5-CMm bdnh xe; 6-Cym ehdn rgch; 7-Cgm bdn phdn; 8-CMm truyen dOng phan phoi hom; 9-Cym lu-d-i rgch luong 65 May trdng sin cd nhilu bd phdn, d day chftng tdi di sdu nghien cftu bd phan lam viec chinh Id bd phan phan phdi hom Tuy vdo limg dilu kien dlt dai, hdu vd yeu d u ky thuat ndng hpc md hom sdn dugc theo dp nghieng khdc Theo cdc nhd ndng hpc hien hom sin trdng nghieng cd nhieu vm diem nhdt Tft yeu d u tren chftng ldi thilt kl bd phdn phdn phdi hom cd thl trdng hom vdi dp nghieng theo y mudn Bd phdn phan phdi hom chftng tdi thilt kl gdm hai cym: - Cym tilp nhan hom chftng tdi dl xult loai mdng cd d u tao nhu hinh Hinh So dd cdu tgo mang phan phdi hom 1-Mang phan phoi; 2-Canh phan phdi; 3-Truc; 4-Bgc; 5-Vit Bd phdn tiep nhan hom loai mdng cd uu diem Id viec thd hom vdo mdng de dang hom mot sd bd phan tiep nhan loai kep dugc lap tren mdt sd mdy trdng hien ed Nguyen tac Iam viec: Ngudi cdng nhan thd hom san vao lan lugt ben cdnh phdn phdi 2; canh phan phdi dugc truyen ddng tft trye phan phdi ldm cdnh phan phdi lac qua ldc lai theo mdt hanh trinh deu, lam hom san rai xudng mang vdi khoang each deu ( Mac du hom dugc tha khdng that deu) Mdng phan phdi cd dp ddc dam bdo cho hom sdn ty trugl xudng dng dan hom hinh Ndi tiep vdi bd phan tiep nhdn hom loai mdng Id dng dan hom hinh Ong dan hom phia tren cd dang pheu de de thu nhdn hom chdy xuong tft mdng, phia dudi la phan ddn hom cd tilt dien hinh chu U Tilt dien hinh chfi U cd tac dyng dd hom khdng cho hom dd vl phia trudc vd sang hai ben, phia sau md dl hom thoat khdng bj keo theo mdy Phia sau dng ddn hom Id banh xe vun nen ddt gdm hai vanh banh hinh cdn, cd tde dyng ddn dlt vd nen gift viimg hom san Ong dan hom cd thl dilu chinh dugc dp nghieng, thay ddi dp nghieng dng ddn thi nghieng hom sdn ciing thay ddi Dp nghieng cua hom sin sau trdng anh hudmg bdi nhilu ylu td: dp nghieng cua dng dan hom, van ldc tien cua may, chiiu dai hom sin 66 ±: Hinh 6ng ddn hom Thiet lap md hinh tinh todn de tinh dp nghieng hom sdn sau trdng dugc the hien tren hinh Vm \IY Hlnh Cdc ydu td anh hu^ng dp nghieng hom sin sau trdng 1-Mdng din hom; 2-Hom sin; 3-Banh xe vun, nen dlt 67 Mdt sd thdng sd ky thuat: P: Gde nghieng cua dng dan hom a: Gde nghieng cfta hom san sau trdng y: Gde nghieng cfta vanh bdnh xe vun, nen ddt L: Chieu dai hom san R: Ban kinh bdnh xe vun, nen ddt Vm: Van tde tien cua lien hgp may t: Thdi gian tft hom cham day ranh tdi bdnh xe vun, nen ddt xong I Vj tri mang dan hom hom sdn thd cham ddy ranh II Vi tri mdng dan banh xe vun, nen ddt xong Nguyen ly lam viec: hom san qua bd phdn phan phdi hom chdy theo mdng dan xudng day ranh rach sdn, hai vdnh bdnh xe hinh cdn vun vd nen ddt gift de hom sdn dftng vtimg Theo hinh ve ta thay tft hom san cham ddy rdnh tdi banh xe vun ven nen ddt xong mat khodng thdi gian la t vdi van ldc may Id Vm thi mdng dan hom djch chuyen mdt doan dudng Id: S = CC =Vnit Tren hinh ta thdy: COS/^ = cos or = AC AC AB L AC AC+S AC + Vm t AB L ^ (1) Tft phuomg trinh (1) ta thdy gde nghieng cua hom sdn sau trdng Id a phy thudc cac yeu td: - Khodng cdch AC (hay gde p) - Van tde tien cua may lien hgp Vm - Thdi gian bdnh xe tft ddt hom tdi nen dlt xong t - Chieu ddi hom sdn L Tft phuomg trinh (1) ta cdn thay neu cho gde nghieng hom san sau trdng a, chieu ddi hom sdn L, ta cd the chpn vd tinh dugc AC, Vm, t; hodc cho trudc AC, Vm, t, L ta se tinh dugc gde nghieng cua hom san trdng Chung tdi thiet kl che tao may lien hgp trdng hom sdn vdi cdc thdng sd ky thuat sau: - Ngudn ddng lyc: May keo MTZ 80/82 - Sd hang trdng: ; Khoang cdch hdng: 1,0-1,2 m - Khdi lupmg mdy 360 kg Sau dd chftng tdi kit hgp vdi trung tdm Giam dinh mdy vd Thiet bj lien hanh khdo nghiem Ket qua khdo nghiem dugc ghi d bdng phia dudi „,-„;, Hang hom sdn trdng bdng mdy Ten may: Miu may trdng hom sin ; Ngay khao nghipm: 03/03/2010 Ky hifu: TRH-2-1,2; Oja diem: Son Lai - Nho Quan - Ninh Blnh 68 Bang Kdt qud khao nghipm may lien hp'p trdng sdn TT Thdng sd Dan vj tinh Kdt qua thir Chi tieu dang ky Vgn tde lam vipc Km/h 1,14 Nang suit lam vi#e thuan ha/h 0.76 > 0,5 ha/h Khoang each hang cm 120,1 120 Khoang each hom cm 76,7 70-80 Dp Ipch trung binh khoang each hom cm 9,9 - H$ so bien dpng khoang each hom % 12,9 - Gde nghidng cua hom cm 42,6 Dp sau lap hom em 113.3 - Chieu dai hom dupc lip cm 143,1 - 10 Chieu dai hom san cm 20,0 20 Nhan xet danh gid ket qud khdo nghiem - Mdy ed kit d u chdc ehdn, lam viec dn djnh, ddpftngdugc yeu elu ky thuat trdng hom san - Mdy dilu chinh dugc dp nghieng cfta hom sdn theo yeu cdu ndng hpc - May rach dugc hang, ddt hom, vun vd nen ddt - Cac chi tieu tinh ndng lam viec phft hgp vdi dang ky Kit luan chung: Mdy lien hgp trdng hom sin cd khd ndng rach hdng, bdn phan trdng hom sdn cd dp nghieng theo yeu elu ndng hpc, cd ndng suit cao, chi phi thip, chl tao dugc tft nen cdng nghiep nudc; sft dung phii hgp vdi nguon ddng lyc tai Viet Nam; dp dyng dugc co gidi ddng bd cdc khdu chdm sde, thu hoach tiep theo 69 ... Mac du hom dugc tha khdng that deu) Mdng phan phdi cd dp ddc dam bdo cho hom sdn ty trugl xudng dng dan hom hinh Ndi tiep vdi bd phan tiep nhdn hom loai mdng Id dng dan hom hinh Ong dan hom phia... Khoang each hom cm 76,7 70-80 Dp Ipch trung binh khoang each hom cm 9,9 - H$ so bien dpng khoang each hom % 12,9 - Gde nghidng cua hom cm 42,6 Dp sau lap hom em 113.3 - Chieu dai hom dupc lip... cua hom sin sau trdng anh hudmg bdi nhilu ylu td: dp nghieng cua dng dan hom, van ldc tien cua may, chiiu dai hom sin 66 ±: Hinh 6ng ddn hom Thiet lap md hinh tinh todn de tinh dp nghieng hom