Nguyin Vfln Vinh Trudng Dai hpc Giao thdng Van tai T6M TAT Bdi bdo trinh bdy torn tdt cdc kit qud nghiin cuv dgng luc hgc hp truyin dgng thuy lifc TDTL dan dgng hp thong kpp cgc cua mdy
Trang 1NGHieNCO'U-TRAO Ddi
NGHIEN CLTU OpNG LyC HOC HE TRUYDN OONG THOY LyC
DAN OONG HE TH6NG KEP cpc COA MAY EP cpc THOY LI/C
\ Dl CHUYfeN Bl/aC
RESEARCH DYNAMIC OF HYDRAULIC TRANSMISSION SYSTEM TO CONTROL PILE CLAMPING BOX OF HYDRAULIC PILE PRESSING MACHINE WITH FOOTSTEP TYPE
WALKING MECHANISM
ThS Nguyin Ngpc TVung, PGS.TS Nguyen Bing Difm, PGS.TS Nguyin Vfln Vinh
Trudng Dai hpc Giao thdng Van tai
T6M TAT
Bdi bdo trinh bdy torn tdt cdc kit qud nghiin cuv dgng luc hgc hp truyin dgng thuy lifc (TDTL) dan dgng hp thong kpp cgc cua mdy ep cgc thuy luc di chuyin bu&c, hipn dang dugc su dung tgi cdc cong tru&ng thi cong & Vipt Nam, tie do khdo sdt, ddnh gid dnh hu&ng cua cdc thong
sd dgng lire hgc hp TDTL den qud trinh ldm vipc cua bg cong tdc Ddy Id kit qud nghiin ciru cua di tdi cap Truang T2016-CK-41, gdp phdn vdo viec ndng cao dg chinh xdc trong tinh todn, thiet ke he TDTL vd Id ca s& di tu dgng hoa qud trinh ldm viic cua mdy
Tir khda: Dgng lyre hgc, hp thong thdy luc, hpp kep cgc mdy ep cgc thuy lire
ABSTRACT
The article presents Ihe research results of dynamic of hydraulic transmission system to control pile clamping mechinism of hydraulic pile pressing machine with footstep type walking mechanism in Vietnam, from that survey and assess the impact of the dynamic parameters on the hydraulic transmission system in working process of pile clamping mechanism This is the results
of research project with code T2016-CK-41 to improve the accuracy of calculation, design of the hydraulic transmission system and is the basis for automation of the work process of the machine
Keywords: Dymanic, hydraulic system, clampingbox, hydraulic pile pressing machine
1 DAT VAN DE may dupc sii dung ngay cang nhidu la may ep
cpc thuy lpc di chuyen budc do nd cd nhidu uu Hifn nay, d Vift Nam, vdi tdc dp dd thj didm ndi trpi Tuy nhien, hlu hdt cac loai may hda cao kdo theo nhu cau phat then nha cao nay ddu dupc nhgp ngoai, va cac dan vi san xult ting ngay cang tang tgi cac dd thj Idn Do dd, sd trong nude ciing chua cd nhieu ca sd khoa hpc
lupng trang thi^t bi va may mdc phpc vu cdng dh thidt kd, chd tao logi may nay thay thd cac
tac thi cdng nen mdng cho cac cdng trinh nay thiet bi n h ^ ngoai Trong qua trinh lam vifc cung ngay cang nhidu Mpt trong nhung logi ciia may, bp phan k?p cpc cd ap suit iam vifc ^
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Trang 2NGHIEN CU'U-TRAO 0(!)l
trong hf thdng thuy luc din ddng ma kep cpc
la cao, qua trinh iam vifc thudng gay ra hifn
tupng dao ddng ap suat, dac bift la giai dogn
qua dp, day la mpt trong nhiing nguyen nhan cd
anh hudng true tiep den chat lupng, tudi thp ciia
may va cac thiet bi thiiy Iuc Do do, vifc nghien
Cliu dpng lpc hpc cua he thdng cac xi lanh thiiy
luc kep cpc ciia may dp cpc thuy lpc di chuyen
kieu budc mpt each bai ban de iam co sd cho
vifc thiet ke va che tgo logi may nay trong nuac
la can thiet, gdp phan nang cao dp chinh xae
trong qua trinh tinh toan, thiet ke, giiip cho vifc
khai thac, su dpng may cd hieu qua va la ca sd
de tp ddng hda qua trinh lam viec ciia may
^^
iC
N—ir~
3
ITinh 1 Sadi hg TDTL dan dgng md kgp ege eua
mdy ep ege thuy lite di chuyin bu&c:
IIDong ca: llBam etiinh IfVamai loan long:
4) Ddng tiddoap suai: S) Van phdn phoi dtiv khiin difn
6) Km mpf chieu eo dihi khiin: 7) Van an loan xi tanh ihHy
hrc-StXitanhkfpc(ie:9iMdkfpeoc
lOtBdu toe ddu IttTKmgdau
De xay dung md hinli dpng ltic hpc
tie thdng TDTL, c4n cd mpt sd gia thijt sau:
IChdng xet qua trinh t^ip sdng trong dng dan diu
thuy luc; Md duyn diu dan hdi ciia cac dng dan
2 NQl DUNG H$ thdng TDTL dan dpng h^ thong kfp cpc cua may ep cpc thuy l\rc di chuyen budc nhu tren (Hinh 1) Nguyen Iy lam viec nhu sau: Bom diu (2) dupc din dpng nhd dpng ca (1) cung cap dau cao ap cho xi lanh thuy lyc di chuyjn ma kep cpc (9) Xi lanh (9) lam vi?c hai chieu, vi?c thay ddi chieu ho^t dpng cua xi lanh nhd vao van phan phdi (5), van nay dupc di^u khien nhd tin hi$u di$n De dam bao an to^ cho mach thiiy Itre va xi lanh trong qu4 trinh lam vipc sir dung cic van an toan (3) vii (7)
ffmh 2 Md hinh nghien ciiu dgng life hgc TDTL ddn dgng md kgp cgc
khdng phv thuOc vao dp suit trong h$ thons Tdn thit nang lugmg trong h^ th^ng dupc tink
thong qua ma sit nhdt, ma sit khd vi mit mil
thi tich ciia bom thuy \ifc; Luc can npi ma sil
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cua xi lanh dupc ke den qua hifu suat ca khi T^;
Khdng xet den quan tinh cua chat ldng trong
qua trinh lam vifc; Cac thdng sd ciia chit Idng
iam vifc (ty trpng rieng, dp nhdt, md duyn dan
hdi the tich) la hing sd; Tam xi lanh thiiy luc
din dpng ma kep cpc la gidng nhau, nen chi xet
cho mft xi lanh
Tir cac gia thiet nghien ciiu nhu tren,
nhdm tac gia xay dung dupc md hinh nghien
cuu dpng Ipc hpc cua he tfadng TDTL din ddng
ma k ^ cpc nhu (Hinh 2)
Dh xay dung md hinh bai toan dpng lpc
hpc cua hf TDTL ndi tren, nhdm tac gia sir dung
djnh Iuat bao toan nang Iupng, vidt cho phuong
trinh ddng chay lidn tpc ciia dau cong tac trong
cac dudng dng va phucmg trinh can bang lpc
*) Phuang trinh ddng chay lien tpc trong
dudrng dng cao ap dupc vi^t nhu sau:
^(a-ej-a-e^-e,=o (D
Trong do:
n^: Sd Ixrm lam vi?c, n^ = 3; n^: Sd xi lanh
k?p, n,, = 8;
Q^- Luu lupng ly thuyet ciia bom,
a = >',.<BiJf(').(m'/s); (3)
Q,„j - LIIU lupng chat Idng rd ri d dpng ca
H$ sd tdn thit luu Iupng d dpng ca thiiy luc
dupc xic djnh [I]:
, ^yjiikV-nJ (5)
[ f t ]
Q^,: Ltm lupng tieu thy ciia xi lanh:
Q„ = A,.v.(mVs) (6)
QjT Luu lupng chit Idng lam bidn dang h?
thdng:
Trong dd:
E_ - Bien dang dan hdi trong dng din cao
ip, bidn dang nay dupc xic dinh nhu sau:
V V
The tich dlu cdng tac trong duong dng dan bang cao su dupc xae dinh:
V,=^l
The tich dlu cdng tac trong dudng dng din bing kim loai dupc xae djnh:
K=^l,
Q^ - Luu lupng qua van an toan tdng,
N^u p ^ ^ thi,g, = {p„ - pjk„,; ngupc lai Q^
= 0;
Thay vao phuong trinh (2) chiing ta thu duijic:
,i.lf ,.,„.!i!M,).,,.,,.,,.(ii)
*) Phuang trinh can bing lpc tren xi lanh kpp cpc dupc xae dinh nhu sau:
F„ = F„k-F, (12)
Trong dd:
F : L\rc quin tinh
(13)
F = m , * i - , ( N )
" '<'' dt
F^: Luc k?p do xi lanh thuy l^c tao ra:
F.tk =(PaA-P,A)-nc'W (14) •
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Trang 4NGHltN CLTU - TRAO 0<il
F : Phan Iuc cua cpc tic dung vao xi lanh
k^(N)
Vay, he phuang trinh vi phan md ta hogt
ddng ciia hf thdng TDTL din dpng bd cdng tac
nhu sau:
i^-T'l.P.A-P.AII.-ft
iPiJ )
Bang each xay dung tuang tp, thiet lap
dupc hf phuong trinh vi phan md ta hoat dpng
cita xi lanh kep cpc khi thuc hifn nha cpc nhu
sau:
Trong dd:
V^- Luu lupng rieng cua bcrm, mVvdng;
m^ Tdc dp quay ciia trpc bam va dpng ca,
vdng/s;
X(t) - Hf sd dieu chinh luu lupng ciia bam,
0<A'(/)5I;
[(oJ- Tdc dp quay danh nghia ciia bam,
vdng/s; p^ - Ap suit danh nghta ciia bom,
P,; P, Ap suat cua dlu cdng tac trong
nhanh cao ap (nhanh A),
P^; p„ - Ap suat cai d|it ciia van an toan
tdng, P^; ky- Hf sd luu lupng qua van an
toan tdng (mVs)/P^;
11^ - Hifu suit thd tich cua bam thuy Ipc;
11^ - Hifu suit CO khi ciia xi lanh thuy Ipc;
^ Thd tich dlu cdng tac trong duong
r^ - Hf sd tdn thit luu lupng d bom thi^ Ipc, (mVs)/P^
V V dng din bang cao su va kim logi,
m-Ep E^ - Md duyn biln dgng dan hdi cua dudng dng dan bing cao su va kim logi, P;
d, d^ - Dudng kinh trong cua dng dan dlu bang cao su va kim lo^, m;
I^, I^ - Chieu dai dudng dng din dlu bing cao su va kim loai, m
Dd giai hf phuong trinh vi phSn (15) nhdm tac gia sur dpng phuong phap Runge-Kutta trong mdi trudng Matlab- Simulink Giao difn ciia chuang trinh dirpc the hifn nhu trgn (Hinh 3)
Hinh 3 Chuang trinh khdo sdt cdc thdng si dpng
luc hpc hp TDTL ddn dgng md kpp cpc
pd nghien ciiu khao sat danh gia cac thdng sd dfng lpc hpc cua hf TDTL din df ng
ma kpp cpc trdn may dp cpc thiiy lpc, nhdm tac gia tien hanh tinh toan xae dinh cac thdng so dau vao cua bai toan, kdt qua tinh toan thu dupc nhu trong (Bang 1)
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Trang 5Bdngl Bdng cdc gid tri thdng sd chgy chttang trinh:
TT
1
2
3
4
5
1 '
6
7
8
9
10
11
12
13
!,#.S;
14
15
16
17
18
19
20
21
^ i k :
22
23
24
Thdng so B<nn ^ ^ Luu lupng rieng ciia bom
Toe dp quay danh nghia ciia bom
Ap suat danh nghia cua bom
t l i ^ suit tbi tich cua bom
H§ so dieu chinh luu luong bom
f,'~ - Xi lanh thiiy luc "''
Dudng kinh trong cua xi lanh
Duong kinh cin piston
Ap luc diu trong khoang cao ip
Ap liic dau trong khoang thap ip
Hi$u suit tmyen dpng co klii cua xi lanh thiiy luc
Van an toan dia m^ch
Ap suat van an toan tdng
He so luu lupng qua van an toin tSng
Luu lupng qua van an toan t6ng
^ | t F l i ^ t : i # 9 $ a g i n g d i n d k thiiy lyc
Chi8u dii dudng ong iiing cao su
Chi^u dii dudng dng tiing kim lo^i
Dudng kinh Uong cua dudng ong cao su
Dudng kinh ngoii ciia dudng ong ldm loai
Mo duyn din hdi cua dudng dng lam bing cao su
Mo duyn din hoi ciia dudng ong lim bing kim loai
ChiSu diy ciia dudng ong cao su
Chieu diy ciia dudng dng kim loai
^ mfmMi i>4« cdng tic
Mo duyn din h6i ciia diiu cong tic
.„ C'j ' J i P ^ ' C i c thSng s6 khic
Lyc cin tic dvmg vio ma kep cpc
IChoi lupng quy din ciia xi lanh vi mi k?p
cpc-Ky lii^u
[«>J
[Pj
1 , X(t)
D
d
P,
f
1,
P„
K,
Q
• • - t - ••
1,
k
d
•1
E,
E
8^
5
• •
E
F^
m
Dun vi
mVvdng vdng/s
Pa
-m
m
Pa
Pa
-Pa (m'/s)/Pa mVs
•* '
m
m
m
m Mpa Mpa
m
m
G i i trj
0,000083
25 3,15E7 0,92
0 - 1
t ' i ' ^ E ' '
0,36 0,28 24,4E6 6E5 0,95
3,4E7 6,67E-10 0,004
5,5 3,0 0,03175 0,03175 0,09E6
0,21E6 0,006 0,004
Mpa 1 150
N
kg
2063500 Thay doi 96,53
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Trang 6NGHlfeN CU'U-TRAOBOI
Ch?y chuemg trinh chiing ta thu dupc cac kdt qua sau:
t
0 t
Hinh 4 Qud Irinh IhfC hign kep cgc
K.^-t
^
j YBJM|
aoTs •
00074S2 B ^
—
0 0.1 0.2 0.3
TTxii gian, s 0.4
,-
0.5 ^
\
—
—
•
V M M * ^
-0.1 Q2 0.3 0,4 0.5 M
Thoi gian s THol gian, a
Hmh 5 Cdc ket qud tinh todn khi mdy thyrc hipn kpp cpc
Trong qua trinh k?p cpc ciia may, vdi ap suit dgt gia tri IOTI nhit cp thd: Ap suat dfng cac kdt qua d tren cd thd thiy cac thdng sd dpng la 35,6.10* Pa, ap suit binh dn la 21,6.10* P«i lpc hpc thay ddi nhieu trong giai dogn bit dlu
thpc hifn kep cpc, sau dd binh dn ve gia tri tri - Van tdc va gia tdc k?p cpc thay (16i tmng binh cua nd, cu the nhu sau: theo thdi gian cd gia tri lom nhat 5,2 m/s tgi tWn
didm 0,2 s, van tdc kpp cpc dgt gia tri trung binh
- Ap suat trong mach cao ap thay ddi va gia tri 0,007 m/s, khi ma kep tiep x6c vdi cpc thi vjn
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TAP CHf CO KHf V 1 £ T NAM Sd 8 nam 2016
Trang 7tdc bang 0 m/s va gia trj trung binh khi nha cpc
la 0,04 m/s
- Luc kep cpc ciia xi lanh thuy Iuc ciing
thay ddi iing vdi gia tri ngoai lpc tac dung vao
xi lanh Lpc kep cpc phat sinh ldn nhit khi ma
kpp tidp xiic vdi cpc va gia tri luc nay la 3,4.10*
N, sau dd gia tri Ipc kep lam vifc binh dn d
2,06.10* N
3 KET LU^N
Tu cac ket qua nghidn ciiu nhgn dupc,
nhdm tac gia riit ra mdt sd kdt luan sau:
Khi may iam vifc thi ap suit ciia dlu
cdng tac trong he thdng TDTL s6 dao dfng,
qua trinh dao dpng ciia ap suit dlu phu thufc
vao nhieu yeu td, trong dd phan lpc ciia cpc tac
dpng vao xi lanh la ydu td tac dfng Idn nhit
ddn ap suit dlu cdng tac va cd thd ndi, ap suit
la thdng sd "dgi difn" cho dp ldn cua tai ben
ngoai
Dao dpng ciia vfn tde va gia tdc ciia xi
lanh k^p cd bien dp va tin sd lan d giai doan
ma k?p tiep xuc vdi cpc, phat sinh luc dpng anh
hudng ldn ddn qua trinh lam vifc, anh hudng
den chat Iupng va tudi thp cua cac thiet bi thuy
lpc Dd khac phpc hifn tupng nay, chiing ta cin
bd tri cpm van tiet luu rapt chieu
cac ket qua nghien ciiu nhu trdn, phin
nao da danh gia dupc miic df anh hudng cita
cac thdng so dfng lpc hpc den sp thay ddi cua
ap suat dlu cdng tac, vgn tdc, gia tdc va luc
cua xi lanh thuy lpc trong qua trinh k^p va nha
ciia ma k^p cpc Tuy nhien, de cd the danh gia
chinh xae miic dp anh huang cQng nhu kiem nghifm cac kdt qua tinh toan ly thuyet chung
ta cin phai cd nhQng nghien cim thpc nghifm, nhim danh gia miic dp chinh xae cua cac ket qua nghien ciiu ly thuyet
cac kdt qua nghien ciiu la ca sd khoa hpc gdp phan vao vifc nang cao dp tin cgy trong tinh toan thidt kd hf TDTL va la ca sd de
tu dpng hda qua trinh iam vide ciia toan bd co cau kep va ep cpc cua may dp cpc thuy luc di chuyen budc d \^ft Nam.»>
Ngay nhgn bai: 08/7/2016 Ngay phan bien: 10/8/2016
Tai lifu tham khao:
III MaHopoBlO.n., KoBajibCKHiiB.O., /lydpoBHHB.A., rpyHHHE.M - PacHemapaMerpOB nepexoAHbix npoueccos rHapaejumecKHx npHBOAOB c oGb^MHue pery.nH[>oBaHHeM cKopocTH
- M : M H H T , 2 0 0 5 r., 6 0 c
121 N g u y e n DinhTir (2010) OSocHOBauHe pauHOHaju>H£iix napaMCTpoB rHAponpHBOAaMauiHH THna B l i p c yHCTOM ycjioBHH 3KcajiyaTauHH BO BberuaMe Lugn an t i l n sT - M a t x c o v a
[3] N g u y e n N g p c T m n g (2012); "Frame design of
an 800 tons hydrualic static pile pressing machine with hydraulic footstep type walking mechanism"
Master's thesis, Budapest University of Technology and Economics, Hungary
[4] ZhouXu (2009) "Research on System of Pile
Driving of Hydraulic Static Pile Driver" PhD Th^is,
Cental South University, China
15] Bao cao tdng Wht dd tai cap Tnrdng T2016-CK-41: "Nghien cuu dpng luc hpc hp thing xi lanh
thuy luc cua mdy ep cpc thuy luc di chuyin bu&c trong thi cdng cdc cdng trinh xdy dung a Vipt Nam "
ISSN 0866 - 7056 TAP CHf CO KHf VI$T NAM, Sd 8 nam 2016