T> I 43/ 4t/Ji. 0J3
TRU'dNG DH SU PHAM KY THUAT TPHCM
KHOA CO KHi CHE TAO MAY
DE THI CUOI HOC KY 1 NAM HOC 2023/2024
Mon: Cong nghe Thuy luc va Khi nen
Ma mon hoc: PNHY230529
D6 s6/Ma de: 1 De thi co 6 trang
Thai gian: 75 phut
Dugc phep su dung tai lieu, khong duoc dung laptop
SV lam bai true tiep tren de thi va nop lai de
Chu' ky giam thj 1 Chu' ky giam thj 2
Diem v& chfr ky
CB cham thi thu nhat CB chain thi thu hai Ho va ten:................................................................................
Ma so S V :...........................................................................
So T T :
..........................
Phong thi:......................................
Cau 1 (1.5 diem): Ve ky hieu hoac dien ten cac thiet bi khi nen tuong ung theo timg nhom cho
trong bang diroi:
Nhom 1 Nhom 2
Ten thiet bi Ve ky hieu Ghi ten thiet bi Ky hieu
Van xa khi nhanh r '
__
11
1
Van chan khong (Sir
dung cho pheu hut
chan khong)
4 1 1 2
TT
" T T I
1 ' ' 3
Van Logic OR (>
Van dao chieu 5/3
tac dong bang nut an
2 phia. tro ve bang 16
xo
. _ L i 1
__
L A
Ll
_
L_
Xy lanh khi nen tac
dong kep co giam
chan co the dieu
chinh
( $ )
Cau 2 (3.5 diem): Thiet ke mach dieu khien dien - khi nen co so do hanh trinh budc. xy lanh va
cac van dieu khien nhu Hinh 1, co the dieu chinh dugc van toe chieu di ra cua xy lanh A voi
hanh trinh duoi ra chain hon co lai, mach dieu khien co che do hoat dong 1 chu ky va n chu ky.
So hieu: BM1/QT-PDT-RDTV/02 Lan soat xet: 02 Ngay hieu lye: 15/5/2020 Trang: 1
Xy lanh A SI
'
_______
i S2
i
Hinh 1: So do hanh trinh biroc khi nen
Xy lanh B S3 S4
_______
i i Xy lanh C S5
III I '
i i I
S6
A+ 1
A
±A-
3 5
Y1 f 1 ^
A r Y2
I* PP
So hieu: BM1/QT-PBT-RDTV/02 Lan soat xet: 02 Ngay hieu lire: 15/5/2020 Trang: 2
SO hieu: BM1/QT-PDT-RDTV/02 Lan soat xet: 02 Ngay hieu luc: 15/5/2020 Trang: 3
12 011
ib ? 14
10
r i
X K
tHt
Q: 50LPM
P: 95 Bar
* u g
3 2
1. ■
Hinh 2: Sa do mach thuy lire va bang thiet bi may
nang thuy lire
Nhan Ten thiet bj
Bong ho do ap suat thuy luc
Xylanh thuy luc tac dong kep, khong co
giam chan
Van tran lam viec nhu van an toan
(Safety valve)
Ac-quy thuy luc
Van dong mo xa ap ac-quy thuy luc
Van dao chieu thuy luc 4/3 cua B thong
T, tac dong 2 phia bang dien, trb ve
bang 16 xo
Van tran lam viec nhu van an toan
(Safety valve) cho ac-quy thuy luc
Bom thuy luc 1 chieu luu luong co djnh
Bong co dien
Van dong mo each ly he ac-quy thuy
luc
Thung dau thuy luc
Van dao chieu thuy luc 4/3 co 4 cua
khoa, tac dong 2 phia bang dien, trb ve
bang 16 xo
Van 1 chieu thuy luc
Van loc dau thuy luc
Cau 3: Cho sa do mach thuy luc cua bo phan dieu chinh vj trl trong may nang nhu hinh 2
a. Ghi nhan cac thiet bi tuong img vao bang ten thiet bj, cac thiet bj tir 1-14. (1,4 diem)
b Tinh dubng kinh trong Do (mm) cua xy lanh 9 de nang vat khoi luong m = 3000(kg) theo
chieu thang dung voi gia toe a = 5 (m/s2) va cac thong so khac tren mach thuy lyc trong hinh
2. hieu suat he thong la 9 5 % , ap suat dau thoat ra khoi xylanh P2 = 0 bar. (1,2 diem)
c. 1 inh van toe di ra V out (mm/s) va di ve Vj„ (mm/s) cua xy lanh 9 biet luu luong cap cho xy
lanh 9 ca 2 chieu la Q9= 30 LPM, duong kinh can piston bang 80% duong klnh xylanh. (1.2
diem)
d. Tinh cong suat thuy lyc Pm (kW) va cong suat dong co dien Pmo (kW) cua bom thuy lyc
biet hieu suat tong cua he bom E0= 70%, cac thong so luu luong bom va ap suat bom nhu
trong hinh 2. (1.2 diem)
So hieu: BM1/QT-PBT-RBTV/02 Lan soat xet: 02 Ngay hieu luc: 15/5/2020 Trang: 4
So hieu: BM1/QT-PDT-RDTV/02 L5n soat xet: 02 Ngay hieu lire: 15/5/2020 Trang: 5