. NGHIEN CLfU - TRAO DOI
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^QUY TRINH CONG NGHE CHE TAO BOM QUANG CHjU MON DUNG TRONG TUYEN K H O A N G
PROCESS OF MANUFACTURING TECHNOLOGY FOR WEAR - RESISTANT ORE PUMPS USED IN THE MINNERAL SUBSTANCE
TS. Dao Duy Trung Vien Nghien cijfu Co khi
TOM TAT
Btfm quang chiu mbn la thiet bi quan trong diidc diing trong cac nhd may tuyen than, tuyen quangApatit; Nickel; Titan; Dong; Vang; Bac; Nhom... vd chung thudngxuyen hi hong mon cdn thay the, do lam viec trong cac moi trUdng khac nghiet. Bdi bao gidi thieu torn tat cac ket qua xay dUng quy trinh cong nghe che tao hOm quang chiu mon dung trong tuyen khoang. Do tinh ngan ggn, hai bao tap trung vao che tao cum dau bdm: True vd cdnh bdm. Day la san pham dUdc si( dung vd nhap khau hien nay khd nhieu... cdn thiet xay dUngquy trinh cong nghe che tao phu hop vdi dieu kien cong nghe Viet Nam, coy nghia kinh tevd ky thuat tot.
Tii khoa: Bdm quang chiu mon; Tuyen khoang; Cong nghe che tao.
ABSTRACT
Corrosion resistant ore pumps is an important equipment which was used in apatite, nickel, titanium, copper, gold, silver, aluminum, coal plants. They are frequently broken, worn and necessary to he replaced, due to working in harded environments. This paper presents a summary of the results of building the technologies process of manufacturing corrosion resistant pumps ore used in be mineral substance field.
Due to the brief the article only focuses on manufacturing pump head unit: shaft and impeller This product is used and imported quite a lot today... necessary to build manufacturing technology processes in accordance with Vietnam technological conditions and have good economic and engineering sense.
Keywords: Wear-resistant ore pums; To choose mineral substance; Manufacturing technologies.
TAP CHi CO KHi VIET NAM, S6 4 nam 2014
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l . D A T V A N D E
Cac bom quang chiu mon dUpc dung trong cac nha may tuyen than, tuyen quang Apatit;
Nickel; Titan; Dong; Vang; Bac; Nhdm... va chung thUdng xuyen bi hong, mon can thay the. Tren the gidi hien nay, cd nhieu hang cua nhieu nUdc san xuat va tieu thu bom noi tieng, nhU cac hang FLS- midth Krebs, FLSmidth Minerals, Metso, Svedala, DenverC. vdi cac tinh nang ky thuat va sU dung trong cac dieu kien lam viec khac nhau. O trong nUdc, van de xiy dUng quy trinh cdng nghe ch^
tao bom nay chUa dUpc de cap nghien ciJfu.
2. SO D O NGUYEN L t LAM VIEC CUA BOM Bdm quang cd 02 kieu dac trUng nhat la:
BOm ly tam va bom hUdng true. ThUc te, cac loai bom quang sU dung nguyen ly ly tam hien dang dupe sU dung rpng rai [ 1 ]. Bai bao tap trung vao bom ly tam thdng dung. So do nguyen ly lam viec ciia bom xem tren hinh 1.
Hinh 1: Sd do nguyen ly lam viec cua bdm [2].
Trong hinh 1:
- A: Banh canh cdng tac; B: Bau gdp xoan 6e;
- ^!'Uj,w^ la cac vec tp toe dp diem dau; c^u^w la cac vee to toe dp diem cuoi.
3. QUY TRINH CONG NGHE CHE TAO 3.1. Trucbofm
3.1.1. Phan tich chi tiet gia cdng: True bdm [3]
3.1.1.1. Phan tich tinh nang dieu kien lam viec, dac diem cua chi tiet gia cong
- Chi tiet cd be mat cO ban phai gia cdng la cac mat tron xoay; Tren be mat chi tiet ph3i gia eong cac ranh then de lap ghep; chi tiet thuoc dang hp true.
Vay ap dung qui trinh cdng nghe che tao chi tiet dang true rong.
3.1.1.2. Phan tich yeu cdu ky thuat vd chon hien phap gia cong Idn cuoi
- De dam bao dp ddng tam giiJta cac bac true 070, 075, 080, 090 ta chpn chuan tinh thong nhat cho phu hop.
Vdi08O(O,OO/-O.O3), 07O(-O,O3/-O,O6), Rz = 2,5 |im de dat dUpc dp chinh xac va dp nham yeu cau ta chpn bien phap gia cdng tinh Ian cuoi la mai.
- Vdi ranh then ngoai gia cdng tren cac may phay van nang.
3.1.1.3. Phan tich tinh cong nghe trong ket cdu Vdi ket cau true nhU ban ve yeu cau, thay:
ket cau true la hoan toan hpp ly khdng can sifa doi gi them.
3.1.1.4. Chqn phoi vd phUdng phap che tao phoi Loai phoi dupe xac dinh theo ket cau cua chi tiet, vat lieu, dieu kien dang san xuat va dieu kien san xuat cu the cua tiing nha may xi nghiep.
1- Phoi thep thanh:
Thudng diing de che tao chi tiet kep chat, cae loai true, xi lanh piston.
U'u diem: Gia thanh re, de tim; NhUdc diem: Lupng kim loai hdt di Idn.
2 - Phdi dap:
U'u diem: Cd the dap dupe cac chi tiet co
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NGHIEN CUfU - TRAO D O I
hinh dang phUc tap,lUdng kim loai hdt di nhd;
NhUpc diem: Phai che tao khudn dap nen gia thanh san xuat phdi cao.
3 - Phdi ren tU do
Uu diem: Gia thanh ha do khdng phai che tao khudn dap; NhUpc diem: Dung trong san xuat ddn chiec loat nhd vi phoi cd dp chinh xac khdng cao, san lUpng phoi it.
Vdi chi tiet da cho dUa vao ket eau, chpn phoi la thep thanh, nhU hinh 2.
1
Hinh 2: Ban ve chi tiet long phdi 3.1.2. Thiet ke quy trinh cdng nghe
3.1.2.1. Chon chuan
* Yeu cau chung khi chon chuan
Dam bao chat lupng chi tiet may trong suot qua trinh gia cdng; dam bao nang suat cao va gia thanh ha.
* Nguyen tac cd ban khi chon chuan
- Chpn chuan phai xuat phat tU nguyen tac 6 diem, de khong che het sd bac tU do can thiet hpp ly tranh hien tupng sieu dinh vi va thieu dinh vi, mot sd trUdng hop tranh thUa dinh vi;
- Chpn chuan sao cho khdng bi lUc eat.
luc kep lam bien dang chi tiet gia cdng qua nhieu dong thdi lUc kep phai nhd de giam si£c lao ddng cho cdng nhan.
3.1.2.2. Chon chuan tinh
* Yeu cdu khi chon chuan tinh
' Dam bao yeu cau phan bd du lUpng dU
cho cae be mat se gia cdng;
- Dam bao dp chinh xae ve vi tri tUong quan giUa cac be mat gia cdng vdi nhau.
+ PhUPng an 1: Chuan tinh la hai 16 tam Uu diem: Dam bao dp dong tam cao giUa cac bac true qua nhieu Ian ga, khdng gian gia cdng Idn;
Nhupe: Do cUng vcing thap.
+ Phuong an 2: Chuan tinh la mat tru ngoai cua true sxi dung mam cap 3 chau.
Uu: Cd lUc kep Idn, cd tinh van nang cao;
NhUpc: Dp chinh xac dinh tam thap (do ket cau mam cap phUe tap) thao tac ga dat tUOng doi don gian nhUng nang suat khdng cao, khdng gian gia cdng bi thu hep.
TU Uu nhupe diem cua 2 phuong an tren, chon phuong an 1.
3.1.2.3. Chon chuan tho
* Yeu cdu khi chon chuan tho
- Dam bao phan bd dii lUpng dU cho cac be mat gia cdng; Dam bao dp chinh xac ve vi tri tUOng quan giUa cac be mat gia cdng vdi cae be mat khdng gia cdng.
Vdi nhUng yen cau tren, chi cd mot phuong an chpn chuan thd la mat tru ngoai.
Uu: Cd tinh van nang cao, lUc kep Idn;
Nhupe: Dp chinh xac dinh tam thap, nang suat ga dat khdng eao, khdng gian gia cdng hi han che.
3.1.3. Thiet kequi trinh cdng nghe [5]
TU cac phan tich d tren ta chpn phuong an gia cong va tien trinh cong nghe nhU sau: '•
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TAP CHi CO KHI VIET NAM, S6 4 nam 2014 www.cokhivietnam.vn
NGHIEN CUfU-TRAO DOI
3.2.2. Thiet kequi trinh cdng nghe [4]
3.2. Canh btfm
3.2.1. Phan tich chi tiet gia cong: Cdnh bdm
TU cae phan tich d tren, chpn phUOng an 3.2.1.1. Phan tich tinh nang, dieu kien Idm viec, gia cdng va tien trinh cdng nghe nhU trinh bay dac diem cua chi tiet gia cong tren hinh 4 dudi day
- Chi tiet CO be mat co ban phai gia cdng la cac mat trdn xoay;
- Tren be mat chi tiet phai gia cong ren de lap ghep.
3.2.1.2. Phan tich tinh congnghe trongket cau Vdi ket cau true nhu ban ve yeu cau, ta thay: Ket cau canh bom la hoan toan hpp ly khdng can s^a doi gi them.
3.2.1.3. Chon phoi vdphUdngphdp chetqophoi Phoi dap
- Uu diem: Cd the dap dUoc cae chi tiet cd hinh dang phUc tap, lUpng kim loai hdt di nhd;
- Nhupe diem: Phai che tao khudn dap nen gia thanh san xuat phdi cao.
Ban ve chi tiet long phdi dupe the hien tren hinh 3.
Nguyen cdng 1:
Xen mat dau 095
Nguyen cdng 2:
Tien thd, tien tinh 039
3 v S "
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Hinh 3: Ban ve chi tiet long phoi
Nguyen cdng 3: Tien tho 050, 060, 095, cat ren 2'"
Hinh 4. Cac nguyen cdng gia cdng cd khi chinh.
Trong nguyen cong 3 (hinh 4), tien hanh:
Budc 1 - Tien tho 0 5 0 , 0 6 0 , 0 9 5 ; Bade 2 - Cat ren 2'".
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NGHIEN CUfU-TRAO D6I
4. KET LUAN
N h u vay, tren co sd cae tinh toan thiet ke tU cae nghien cUu trUdc, bai bao da trinh bay dUpc sP do nguyen ly lam viec cua bom; Tdm tat xay dUng quy trinh cdng nghe che tao cum dau bdm, cum quan trpng nhat cua bom, bao gom true va banh quay. Cac quy trinh cdng nghe nay hpp ly va hieu qua trong dieu kien cdng nghe Viet Nam, Ian dau dupe nghien cUu xay dUng thanh cdng. Bom da dUflc dUa vao Cdng ty T N H H MTV Cau 75, Tong Cdng ty Xay dUng Cdng trinh Giao thdng 8 va budc dau dUpc danh gia chat lUpng tot, dat yeu cau so vdi bom nhap ngoai. Gia thanh cua bom che tao trong nUdc chi bang 2/3 nhap ngoai, chat lUpng tUPng dUOng va chu ddng trong viec thay the va lap ke hoach san xuat. •
Ngay nhan bai: 08/3/2014 Ngay phan bien: 18/4/2014
Tai lieu tham Idiao:
[1]. A.A.Lomakin, Bdm ly tdm vd bdm hUdng true, NXB. Khoa hoc Ky thuat. Ha Npi (1971).
[2]. Nguyen Van May Bdm, Quat, May nen, NXB. Khoa hoc Ky thuat, Ha Noi (2001).
[31- BiiihNgoc M, Thuy lUcvd may thuy lUc, NXB. Dai hoc &THCN. Ha Noi (1972).
14]. Nguyen DUc SUdng va Vu Nam Ngan, Giao trinh may thuy khi, TrUdng Dai hoc Md - Dia chat. Ha Npi (2001).
[5]. Nguygn Dac Lpc, So tay Cong nghe che tao may T1,T2,T3, NXB. Khoa hoc vaKy thuat, Ha Noi (2006).
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