Trong bai bao nay, nhom tacgiS trinh bay phuong phap nghif m ben mot so chi tiet, cum chi tiet bo gia khoan dimg de khoan tao 16 no min trong thi eong dudng 16 CO b^n khai th^c than viin
Trang 1VE MOT PHl/ONG P H A P NGHIEM BEN MQTSO CHI TIET VA CUM CHI TIET BQ GlA KHOAN DUNG DE KHOAN TAO L 5 NO
A METHOD FOR MODELING STRENGTH OF DRILLING TRIPOD USED FOR HOLING BLAST OF COAL MINING
IN QUANG NINH AREA
Le Quy Chien,
D i n h Van Chien
Tom tiit
Cd nhieu phUdng phap nghiem ben cac chi tiet va may Trong bai bao nay, nhom tacgiS trinh bay phuong
phap nghif m ben mot so chi tiet, cum chi tiet bo gia khoan dimg de khoan tao 16 no min trong thi eong
dudng 16 CO b^n khai th^c than viing Quing Ninh bang phin mem ANSYS, Ket qua nghien ciifu dUOc dimg
de tinh toan dung cu khoan, eac ehi ti^t, cum ehi tiet hb gia khoan va nghidm ben mpt so cum ehi tiet cua
thiet bj khoan,
Tif khoa: Bp gia khoan, tao lo, no min, khai thac than, dung cu khai thac mi)
Abstract
There are a lot of methods employed to determine the strenght of components ofa machine In this paper,
the method for modeling strength of drilling tripod that was used for holing blast of coal mining in Quang
Ninh area by employing ANSYS software is presented The result can be used for designing and analysis
of drill tools It also can be used to checking for strength of drilling parts
Keywords: Drilling tripod, create holes, blast, coal mining, drill tools in mining
ThS Le Quy Chien, TrU(mgf)al hoc Cong nglii^p Qu^ng Ninli
PGS.TS Oinh Van Cliien, TrUdng Sai hoc IVId-Dia chat
Email: ct>lenkhaDthiaiqni)gmail com
I.OATVAND^
Theo chien liTdc phat trien cua
iganh Than den nam 2015, tam nhin
Ien nam 2020; s^n lu'dng than khai
hac ham 16 khoang 50 trieu tan/nam,
:hiem t i le ngay c^ng I6n Di dat muc
leu do, nganh Than phai day manh
'iec 6ho c^c dudng 16 cd ban phuc vu
ho cong tac khai thac Hien nay, thi
ong cac du6ng 16 ca ban trong nganh
han chu yeu dung cong nghe khoan
10 min Be tang nang suit, tang tuoi
hp cua chi tiet v^ may Ichoan can thiet
ihai nghien cijftJ thiet ke cac chi ti^t va
Ngaynhanbai: 01/08/2013 Ng^ chap nhan dang: 05/10/2013 may, tinh toan mot so thdng so cua cac chi tiet va nghiem ben mpt so cum chi tiet tren may khoan diJng de khoan tao
16 no min khi thi cong cac dUdng 16 CO bcin dung trong khai thac than ham 16 vung Quang Ninh
Bang 1 Lo khoan tren guong ciia dudng 16 eo ban
2 N6I DUNG NGHIDN cau
2.1 Dac diem cua Id khoan tren gi/dng dao
L6 khoan tren gUdng dao cCia da6ng 16 cd ban la doi tUdng lam viec cua thiet bi khoan, do vay viec kh^o sat
va phan tich dac diem cCia 16 khoan rat can thiet Qua khcio sat tac gici thay cac
16 khoan tren gUdng dao cua diJ6ng 16
Cd b i n dCing trong khai thac than ham
16 thu'dng co du6ng kinh (j) < 52mm, chieu sau 16 khoan L < 1,2-3m Cac 16 khoan gom mot so loai: 16 khoan co du6ng tam vuong goc vdi mat gadng (song song vdi true dadng 16); 16 khoan co dudng tam nghieng
so vdi be mat gu'ong va true dadng 16, goc nghieng dUdng tam cua cac 16 vien gUdng so vdi true dudng 16 la a = 5" -J-10°, gdc nghieng cCia dudng tam cac
16 dot khau so vdi true dudng 16 la a =
1 2 " ^ 15° (bang l).Hg chieu khoan tren mat gUdng dao cua du'dng thdng 2,8 x 1,8m trong dudng 16 cd ban
Cae thong so
Chieu rong (m) Chieu cao (m)
Khu vuc dutfng thong
Cd ehdng tam
2,1 2,7
Khong chong tam
1,8 2,6
Sau hoan thien
1,2 2,0
Buong md rong
Co chong tam
4,5 3,5
Khong chong tam
4,2 3,2
Sau hoan thien
3,5 2,7
(Cac kich thUdc ghi trong bang la toi thieu khi chieu day Idp be tong d dUcing thong la 300mm va khu vi/c
buong m& rpng lay trung binh la 350mm)
Trang 22.2 Tinh todn ILTC tac dong len
thiet bj khoan
2.2.1 Cdc thong so dUa vdo tinh
toan
Viec lifa chon thong so tinh toan
cho thiet bj khoan dUdc dua tren mot
so chi tieu ky thuat sau:
- Di chuyen dUdc trong dudng 16 co
kichthi/dcla 1,8 x 2,6m
- Khoan dUdc cac 16 tren gu'ong dao
cd kich thudc nhd nhat la 1,8 x 2,6m va
Idn nhat la 4,5 x 3,5m;
-Sdcan khoan: 01
- Chieu sau lo khoan < 3m
- Dudng kinh 16 khoan <, 52mm
- Nang suat khoan > 13cm/ph (7,8m/
gid)
-KhoandUdcdatdac6dpcijfngf^<12
-Tdng cong suat dan dpng: <30kW
-T6cd6di chuyen: s3km/h
- Trong lUdng toan bp thiet bj: <
3000kG
2.2.2 Cdu tgo cobdn va nguyen ly
lam viec cua thiet bj khoan
a Cdu tgo ca bdn (hinh 1)
Hlnh 1 So do bo tn chung cua thiet bi khoan
1 Dau khoan; 2 De dau khoan; 3 Xe
Cd sd; 4 Khdp can; 5 Xylanh nang ha
can; 6 Can ngoai; 7 Can trong; 8 Chup
xoay dau can; 9 Khdp de; 10 Xylanh
n i n g ha khoan; 11, Xylanh lie can; 12
Xylanh lie khoan
- Dau khoan dien 1 cd cau tao dong
bd, cd Cd cau truyen xich de an mui khoan vao 16 khi khoan va dUa mui khoan ra khoi 16 khoan; d i u khoan l i p tren dam dan tien cau tao b i n g thep dinh hinh (dam dan tien va bo truyen xich cd the chinh theo yeu cau thuc te) Cum dam dan tien dau khoan trUdt dUdc vdi cum de dau khoan; xoay dau
khoan va nang ha dau khoan dUdc thiic
hien bang xylanh thuy lUc 10 va 12
- Cum de dau khoan lien ket vdi cum c i n khoan bang cum khdp de 9 va chup xoay d i u c i n 8 Chup xoay 8 lien ket vdi cum can trong 7 b i n g cac bu Idng, chup xoay 8 cd the quay quanh dudng tam can khi thao cac lien k^t
bu long Cum c i n trong 7 cd c l u tao dang dng va nam trong long cua cum can ngoai 6 tao thanh dang ong Idng, Hai cum nay djch chuyen tUdng ddi vdi nhau nhd xylanh thuy lUc n i m trong Idng
-Toan bp cac cum neu tren lien ket vdi xe cdsd4 bang cum khdp c i n va be khdp c i n 4
- Xe Cd sd la loai xe dung cho may xuc mi ni, di chuyen b i n g xich, he thdng cong tac van hanh b i n g xylanh thuy lye
b Nguyen ly Idm viec
- Khi thifc hien khoan 16 da dupc
xle dmh va danh d i u tren gUdng dao,
xe tien ve phia gUOng va diing each
guong khoang 2,4m- 2,7m
- Ha ludi LII due nay lUdi Cii n i m phia duoi xe), dieu khien xylanh thuy lUc hoat dong, phdi hop cle thao t i c dUa mui khoan den vj tri danh dau trudc
tren gUdng, Diing va khoa eCfng cle
xylanh, m d t d t h u ^ IL/C
-Ddng dien cho dau khoan lam viec (mui khoan dUdc day vao bdi ed c l u truyen ddng xich) Khi 16 khoan dat do sau yeu cau, dieu khien cho co cau liji khoan ra
2.2.3 Xdc lap mo hinh tinh todn bp gid khoan
a Mo hinh tinh todn
De tinh chpn xylanh t h u ^ luc cung nhu tfnh ben cho cac chi tiet, cum chi tiet thiet k^ ta dUa ra md hlnh tinh toan nhutrong hinh 2
Hlnh I So do luc tac dung len he can thiet bi khoan
fa Ndi dung tinh todn:
Thiet lap quan he giCfa cac ngoai life
va ndi luc tren cac xylanh, tren cac khiu khdp qua gdc nghieng eua can Sau
dd k h i o s i t cac ndi lUc theo cic goc nghieng de tim ra cac gia tri Idn nhIt cOacacndi liic nay
Tren hlnh 2, the hien:
* C l e ngoai lUc:
- C3^ = 1000[N]:Trong \iiang dau khoan;
- G„ = 1966[N]: Trpng lUpng thanh trupt (cum dam dan tien);
-G^=1590[N1: Trpng luong toan bp can;
- P^ = 9000[N]: Phin lUc tif dat dl tac dpng len mui khoan;
" Cac npi li/c:
P„,: Life ma xylanh ning can phii chju;
P^ij: Life ma xylanh n i n g thanh trUpt p h i i chiu;
Xj,: Luc theo phuong X cCia khdp tai diem D;
Y^: Lilc theo phUOng Y cua khdpta diem D;
X^: LUC theo phUdng X cua khdp ta diem A;
Y: Life theo phUdng Y cCia khdp ta diem A
* Tach khdp tai D: l^y tong mdmer tai D ta c d :
l.M^ = 0 (1
=> G^.l^ + P^.h - G„.lg - P^i^-I^sine = 0
M + Gkls-GjJ
=>Pv„
l,.sine
(2
Trang 3ZX = 0 (3)
=>Xp-p^-p^,^.cose=o
=> X^ = P^ -I- P,„.cose (4)
I Y = 0 (5)
=>Yp-G^-P^,j.sine-G„=0
=> Yj, = G^ -H P^|,.sine -HGtt (6)
Xet he thanh c i n , sddo lUc t i e dung len he c i n g i l khoan
duoc mo t l tren hlnh 3, Lay tdng mdmen tai A ta cd:
ZIVIA = 0 (7)
=> P^|,.l,.sini|j - Pj^|^.(l, -t- l^).sin(p - G^.(l, +
ip.cosa Yp.(l, + lj),cosa + X^,[(l^ + lj)sina + [^.sinG] = 0;
Pxi2-('i +l2)sina-i-lg.sin9.sin(p-i-G^.{l, -nl^Jcosa
=>K,
, YD.(i,+"z) cosa
-l,.sin\|/
J, -l-l,)sina -f 5,sin0
(8) Ij.siny
ZX = 0
=> \-K^- PxM-COS (a-n|i) - P;,|2-cosB = 0
=> X^ = Pxi,-cos(a -I- i|i) -I- Pj(i2''^°^^ + ^D
ZY = 0
=> Y^ +Yo +G^ - PxM-sinta + M" Pxi2^'"9 = 0
=>Y^ = Pxii-sina + ip) + Pxi,sine - Y^ - Y^
Trong do:
9 - Gdc tao bdi xylanh nang thanh trucrt v l thanh trUdt;
'" cosa \ , I , _ , „ - ; „ r I,,
(9)
(12)
9 = arcsin ; 14} = arcsin
^ V n + l f - 2.l„.l,.cos(a + 6 2 ' ' )
CF ) ' i^EB.sin(a+62'')
i)j - Gdc tao bdi xylanh n i n g can va can;
6 d i y : CF = -JI4 +\^ - 2.1^.1^ cos a
EB
(p = (a - 6) Gdc tao bdi xylanh n i n g thanh trUdt va can;
y = 90°-o: Gdc tao bdi khdp quay tren va thanh trUpt;
a = 0 -^ 45": Gdc quay cua c i n so vdi phUdng ngang;
I, = 0,82[m]; 1^ = 1,70[m]; 1^ = 1,0[m]; I, = 0,45 [mm]; l^ =
0,84[m];l^ = 0,177[m];
1^ = 0,44[m]; 1^ = l,25[m]; 1^ = 0,26[m]; l,„ = 0,269[m]; l „ =
0,32[m]; h = 0,25[m]
iilnh 4 f)6 thi life tren xylanh nang
Dung p h i n mem Matlab de khIo sat g i l tri lUc tai eae vi tri lam viec cua thiet bi khoan theo sii thay doi gdc lam viec
a, ta cd the tim ra vi tri l i m viec cd gia tri liic tac dung len cac chi tiet va cum chi tiet cCia thiet bi eong tac la ldn n h l t Hinh 4 va hinh 5 la do thi lUc tren xylanh n i n g thanh
trupt P^i^ = f(a) va xylanh n i n g can P,,,, = f(a) thay ddi theo
gdc nghieng c i n a
Tii ket q u i khIo sat ta thay: tai 0 = 0" thi cae dai laong tinh toan P^^, P^^, X^, X^, Y^ dat gia tri max (tri/trudng hpp cua Y^ dat max tai a = 19")
Dudi day la ket qua cac gia tr; luc Idn nhat tren cac khdp
va cac xylanh nang thanh truot, n i n g c i n : Pxi2m« = •184,9[N]; X^^^, = 844,3[N]; Y ^ ^ = 817,9[N];
^«m«=5M9,7[N]; Y^^^ - 1273[N]; P^,,^^, = 5895[N]
2.3 Tinh toan kiem nghiem ben mot so cum chi tiet
bang phin mim Ansys
Trong gidi han bai bao nay, nhdm tac g i l tinh t o i n nghiem ben dung cu khoan cCia may khoan gom mui khoan
va chodng khoan
2.3.1 Tinh ben chodng khoan
Ta tinh ben mui khoan tai vj trf liic t i e dung !en chodng
la Idn nhat:
^Kma, = ^0^ 0[^]; ^K" 45000[Nmm];
Chodng khoan cd cau tao nhu (hlnh 6) ta SLT dung p h i n mem Ansys de kiem nghiem ben eho chodng khoan (do dp ben chi tiet bang p h i n m^m md phdng tren may tinh Ansys 12) Ket qua tinh toan dUdc the hien tren hlnh 7,8,9,10 Dieu kien de chodng khoan d i m b i o ben: o < [aj= ——
- o |_: Gidi han chay cua vat lieu lam chodng khoan (chpn
thep sCr dung la Ct5 ta cd o^^^ = 260N/mm');
- n = 1,5: he so an toan, vdi chodng thudng lay n = 1,4 -H 1,6
- kj = 2: he sd tai trong ddng trong lam viec;
=>o^^-4,2854.10« N/m^< [O] - ^^^L^ =86^7.10^ [N/m']
Vay chodng khoan bao d i m dieu kien ben khi lam viec
2.3.2 Tinh ben mui khoan
Tinh ben mui khoan tai vi tri liic taedung len mui II Idn nhat:
p^^^^ ^ 9010[N]; Q„ ^ 2600[N];
M, = 45000[Nmm];
Mui khoan ed kich thiide nhd, cau tao phtfc tap (hlnh 11) nen
ta kiem nghiem ben bang phan mem Ansys (do dp ben chi tiet
b i n g p h i n mem md phdng tren may tinh Ansys 14) Ket qua tinh
t o i n diipc the hien tren hlnh 12, 13,14,15
Dieu kien de mui khoan dam Hinh 5 fio thi lUc tren xylanh nang can thanh trugt
Trang 4•H!WJ!l»Mc6NG NGH|^
Hinh 6 Cau tao va hinh dang chobng khoan Hlnh 7, Bieu do bien dang tren choong khoan khi
khoan lam viec
Hinh 8 Bieu do ung suat tren chobng khoan khi khoan lam viec
Hlnh 9, Bieu do litig suat tren chobng khoan theo
nguyen ly cue dai
Hinh 10 Bieu do ilng suat tren chobng khoan theo nguyen lycUc tieu
^ = < #
T-Hinh 12 Bieu do bien dang tren mui khoan khi
khoan lam viec
Hinh 13 Bieu do ilng suat tren mui khoan khi khoan lam viec
1>-Hinh 15 Bieu do ling suat tren mui khoan theo
nguyen ly cifc tieu
- o^^: Gidi han chiy cua vat lieu lam mui khoan (chon thep sCf dung la thep hpp kim dung cu cd dp ben cao 40XC, tacda^^=1080N/mm^);
- n = 1,5: he sd an toan, vdi mui khoan thudng lay n = 1,4 -^ 1.6,
- k^ = 2: he so tai trpng dpng trong lam viec;
Vay o^^, = 299,58.10^ N/m= < [o] =
1>
Hinh n Cau tao va hmh dang mui khoan
Hinh 14 Bieu do Ung suat tren mui khoan theo nguyen ly cue dai
108Q10 ^3Qoio>.[^/rn2], Mui khoar 1,5.2
dam bao do ben khi lam viec, TCf ket qua thu dUOc ta nhan thai Lfng suat ldn nhat cua mdt so chi tie cua dung cu l^hoan co gia tri o^^, • 299,58.1 O W m
-o^^, - 299,5810^ N/m^ < [aJ
360.10"^N/m=-360.1 onPal
ij „ - Gidl han chay cua vat lieu du'c dung de che tao, chon vat lieu cheta
Trang 5ic chi tiet cua dung cu khoan la thep
3p kim dung cu cd do ben cao 40XC,
^ ^ - 1 0 8 0 k N / c m '
Bien dang cCia cac chi tiet cua dung
1 khoan dat gia tri nhd can thiet
Trong qua trinh tinh toan nhdm t i e
I da xac dinh dupc vi tri xuat hien a^^_
jy la can c i i de tang cudng v i t lieu va
jng cao he sd an toan cho cum ehi tret
Dng q u i trinh lam viec,
3.14HAN X^T VA KET LUAN
TU cac ket q u i nghidn cUu neu tren
10 phep tinh toan, lUa chpn, nghiem
3n dUdc dung cu khoan va cac chi tiet
l i e cua gia khoan theo eac thdng sd
ky thuat va yeu cau dat ra khi khoan
Id no min phuc vu dao cac dudng Id
CO b i n d md than vung Q u i n g Ninh
Gdp phan t i n g n i n g suit, giam gia thanh khai thac, nang cao tuoi thp eua cac cum chi tiet va chi tiet cua thiet bi khoan diing trong khai thac than h i m
Id vung Q u i n g Ninh
Phin bien khoa hoc: TS Le Thi/tfnq Hien
TAI LIEU THAM KHAO
[1], Nguyen Van Can va NNK, SUc ben vat lieu, NXB Giao thong Van tai Ha Ngi (199S),
[2] Le Quy Chien, Luan van thac sy ky thuat
"Nghien cuU tinh toan mot so thong so cua thiet bt khoan thi cong dubng 16 co ban dung trong khai thac than ham 16 vung Quang Ninh" TrUbng Dai hoc mo-6ia chat (2010),
13] VO Liem Chinh, Co sc( thiet ke may xay dung, NXB Xay dung (2002),
[4] -Dmh Ba Tru, Hoang Van LOi, HKdng dan sif dung Ansys, Hoc vien Ky thuat Quan sif (2003) [51 Cam nang Cong nghe va Thiet bi mo, NXB Khoa hoc vaKy thuat (2006),
[6] Vien Ky thuat Cong binh, Bao cao tong ket
de tai "Nghien cUu thiet ke thiet bi khoan thi cong dudng ham quan sU khau do vUa va nhb" - ma so BTDL-05G/03
Hdi THI THOGldl NGANH CCKHf T H A N H PHO HA Ndi NAM 2013
Trong ba ngay tif ngay 3/10 den ngay 5/10/2013, trdcflig Bai hoc Cong nghiep
Ha Ht\ dang cai to chu'c Hoi thi thggioi nganh cokhiThanh pho nam 2013.6ay
la hoat dong thu6ng nien ciia Lien doan Lao dbng thanh pho Ha Ngi Hoi thi la
hoat dbng f nghia nh3m thijcdly phong trao"On Ij? thuyft, luyen tay nghe, thi
thogibi"trong cong nhan lao dgng ThO do nbi noi chung va cbng nhan nganh
CO khi noi rieng Hbi thi da thu hut 21 dbi thuoc 62 doanh nghiep gom 120 thi
sinh V6i co sb vSt chat duoc diu t u hien dai nhu ph6ng may CNC, may hSn tu
dgng, may cat plasma, may cat khi t u dbng, may cat thiiy l i r e , hai phan thi ly
thuyet va thuc hanh deu difoc dien ra d^m bao dting tieu ehi ei^a hgi thi de ra
Oai dien cho dcfn vi dang cai t6 chiic, TS.Tran Diic Quy - Hieu trudng vui mifng
chao don cac vj dai bieu, cac doan cung cac thi sinh da ve tham du Hoi thi va
cam ket tao mgi dieu kien de hoi thi dien ra tot dep
KHAI MACDANHGlANGOAlCdABWdlHETHdNG QMS ISO 9001:2008
hien ke hoach danh gia kiem chiing ciia to chiJc Bureau Veritas (BV) vdi Ihe thong van hanh QMS ISO 9001:2008 sang ngay 24/9/2013 tai trUdng Dai hoe Cbng nghiep Ha Noi, Le Khai mac danh gia ngoai ciia BV vdi he thong QMS ISO 9001:2008 da di/oc dien ra, Trong qua trinh danh gia tai cac don vj, doan chuyen gia danh gia ngoai cDa BV se chira nhutig diem manh can tiep tuc phat huy, dong thdi eung ehi ra nhOUg diem han ehe, ehUa phii hcfp can khac phuc Tren cosd do, danh gia vien se dua ra eac khuyen nghi phO hdp giup cac ddn vj eung nhif nha trudng cai thien, nang G O chat lugng trong he thong van hanh
|QMS ISO 9001:2008 DU kien ket qua danh gia ngoai se difdc cong bo vao cuoi thang 10/2013