LỜI MỞ ĐẦU
!"#!$%#&
' ()*+,-./01)2
342#+/&5#63// !7
*8/**39# !4%0:#%#
;8&<=>%?@/4+/A#B4%+/
,@,$81?@/4+#4+4+
C-&
<))>%D$4A3E*4A
2;64%@/ !./#6#A,$
4%"4++/,@3#A./F3E#%+84%/>,-
G0>0%4A,(/A%
4%4+#H4-,-(./8#B)
#6,$,$3A4%)#63/&
I%4-/,(0% 4;3@*G#*J%3
/J/@/4+)#6#A,$&<%F33
J4+)4% +/,@&
I%4-%2+/-/3?K !"
"#3*BJ(4%&
L4A)
Chương 1. Tổng quan hệ thống bơm chất lỏng bình kín
1.1. Khái quát về hệ thống bơm chất lỏng bình kín
I#6#A,$ !M0N*D-010N
O )()*&)%#6
1
!/@FA%/3 ! 4%,$N$
02 =39# !#= 4%&I,$#%#
P)-C/ !*/#=0#61&
Q4=R#6,$39# !#=0*/
^I./\#%#1-4%P*
U =V&
^I*U =0J/V
^IU0J/3:&&&V
/#%39 !U#V
'%23#P) %UI79
((V*/U1,(#=%))V&
1.2.3. Sơ đồ các phần tử của một hệ thống bơm
5*JM8) !=)/A_
`_&_\L>/)
I#6F@a./#;b./c./4d4
e4%W#6./Wf4%@Gg&S#_0:@./
Y__#%>>hCRM2_Y#%>>hCRMW&
1.2.4. Các thông số cơ bản của bơm
&5*`U*/V&
S3#%# !99# !A4C;# !
#68./UF)-)WV&
5*` !$ij#6Uj =V
P$D*/\
gHHP
ργ
==
.
U_&_V
3\
3
k\;# !A#6 !U'l
b
d
h∑
^ SA #) * / ;U 9V "P
g
vv
2
2
1
2
2
−
g
vv
hh
g
pp
HHH
dhdh
2
)(
2
1
2
212
−
+++
−
++=
∑∑
l
g
v
h
ξ
λ
3\
4
4
0
^4K#64%WUlV
r
r
0
^)R#4%W
#
#
0
0
0
0
^+/0%4% ,$WUV
∑
h
ξ
lq`pq
5(/N'U AV&5(/%
#='43D&
4
5(/,jU'V&5(/% #='@:
)///+"4%%20*2.8
&
3
10*
*
***
*
−
==
tđbtđ
đc
HQkN
kN
ηη
γ
η
p,tqU_&bV
3\,^)0*2
524=,(/0 =\Y,t#,u_cv
Y^c,t#,u_cv
÷
_Yc
c^cv,t#,u_Yc
÷
__c
η
V#%h"(/"/$
i
N
4%(/
N'&
N
N
i
b
=
η
U_&aV
`)//>b*J\
mHQb
ηηηη
**
=
U_&cV
3\
`)//# /# !U)//@$V0D# /# !42h&
`)///X#U)//*V0D*4
&
`)//,$0D4"*K,$UD
NZV4%+P%/>U7?(V4=#6U
#1V&
1.2.5. Một số lo'i bơm
&I#1
I#1#%#0z#%4)?/A#B/X
Y
~
^I*/`uYv÷dv`
Y
~&
^I*`ydv`
Y
~&
o?C4%#*j*-\
^I34%**#&
^I3+/*#%( !#*j*-*&
^I3+/ !j*&
o?0z#64%(\
^I3(#6F*$ !;#%
)&
^I3)&
o?,-/46\
^I46#%3P*46#%*J./1
N&
^I46#%%46/%F*JA|*JG
4=(%*&
o?P(\
^IPG&
^IPi&
6
o?##6 !/@i\
^I@ =&
^I@8*W0J/8&
o?\
^5#%3-C@1,(
_
[
Y
^]%*/ !M4%MW
4
_
4
Y
^]%C02M4%MW
€
_
€
Y
^SA;4C$*/[
_
4%[
Y
S4=#1G4=|42./Ch3
C*%3#%4)4=)//;#%
*CG&nC*% !h0zA%#)/,‚/K
&
^] /# !\
] /# !#%# !#6%4K/@ !4C
&nC8# !% !7Ci
-*02#6%/* !&
] /# ! !,B)/#%sG/A#%
b
l
b
l1
^<6\
<63@3,-/?,@/j*j*0;&53@ !
-%+/*J4%/3j*#A,-4=/&5 -
i>P!*,&5#)/-4%,@//•
4%+/,)(&
1463@ !%+/,A)4=/4=
+/N$&'3O23BH4),/@$Dƒ
N#%,$C =4%-,Z
8
Q#*M"P80 ƒABC4C0%
94%G#*j*@88,‚/K&
]0z#64%%M&[J3*#6
?* -*/-%(37&IJ/3*
%3)4N-*J*%*Hi8D
9# 0 =09&
^I(\
I(#12>+/
UL# !Fc^gVA1274% !./
PAN./&I !-F#4K#)/,
/#H4%//X !-F>Pj*&
I#13b#$#%,$*$R*$U*$
2#,$V4%*$+/R/•/4%-(4% /AG
9$J*J# /# !%,-/30
$+/&
5+/4%0%Uβ
Y
6V@-/*#=&' !
#$4%Uβ
Y
#=V-/8# !&
^‡*/U*`V3@U G4=+4%
(/,jV&
10
`_&a\5/*
<=:# /# ! /*(>,+4%,3-
U,$,$V4=#1&{4KR4:*/*4%/
$0:*( R4:*/4%UAYvvV
)*(- /-/)U )/+i
0J/42*/A#)/A€?)/X#+/,@A
ZV&
1.2.6. Đ9c tính của bơm
{ !#R)AR17jP$
!%)*8/+&s/3"*G
J*83,,j&I3+/#/1?h,8
#@*D-4% !M0N+%%&
{0)$P/((90JA# /#68
0J4%*J9#6-%*90>#6
4%W&
]$/-4%)\,./"
/A*`(/'4%)//ˆ#%%# /# !s&s/
)`u`UsV‰'u'UsV‰ ˆuˆUsV;#%P$A&S
`u`UsVPsusU`V-,89#%4)A2;#%P
$#%4)&
11
`_&c\5P$(#1
'K7jP$'UsV\5(/'3C@/,# /
# !iv&]%/+R0T0%&{4K
!*#$,R#%,,34eAW@suv&L/3
*R4@4%#6C./30(/
^ =-JB#-/#% =
),$P)R&{:#%#;%
#,4)4K8#674=# /# !J-02#6
O*80"*9%3&
^#)0:@/@4K#)/4K#)/
() !-,-+/&+/4
+i4%4+J8./-/\
&{/G#6J-G
&];# !J-
&G,R
&G0F
^-,-84)/+84)4%#%4)+
4")&
^`)88$)/0F4%,R
,3A/J/&
^'")P) 0J/-*83
+/4C$0F,38Z
1.3. Giới thiệu hệ thống bơm chất lỏng bình kín
&] />[ŒŽ{
13
`_&d\] />())#6,$
&n8$# />()
<=A/J/+%#%+/,@3+/
A#;>b[_[Y[b&IM0N#%#1 !#
R,(>#>3#+/3†#?)8
4)./8&G#6,$ !i8-G
@*N4N4)&52 +/,@EM0N-
08-]<)&‡*/,$ !4%,%
*/6A/J/E9*/),$j&‡*/ =
4%/ !,@4C$%+/34iN$
@J/,L)EJ/&
8-GE !;4+4%7M#$?/K/\
^•G =0 =4C$\IK>8b_Yb
&
^•G =,8F4C$-4C$\IK
_4%Y&
^•G =,8F4C$-4C$\IK
_&
^•G =A4C$\-&
^.//*A/N-/*/,$
,( !"RCA/J/26*8,R*/@
9*/,$&<+88*/;./
,$342./;)&
<=) *1$RAE;-C
+/,@%)3#%[]5Le^bvvL??4=
#$0/1\
5-C+/,@[]5AG4%$#
)()*&Ii-*JM)i[]5
./+/,@RA’4%./;#%)/./8
&[]5#%#;)#?$A//W&
^$,(\•[]5J$,($A/
/W+/,@#?@):G9&
^-,)9# !\[]5A/N9# !RG*$8
$( &
^n%*\•[]5 ƒc-_v#? 33
,89-%9#?&
^Q89$G4=( ()*\546[]5 !
#%F4K#)/G3,89C/ !NW0J/ƒW
/4%T/&5$A//W,(3,89%&
17
}n8$# />/KA\
IJ/,)J/-/G#6
6bv,8&L/,,RbG
#6,$9#A=Cyubvb&-*NG
#6yudvY4%/:G#6yugc
0F84%)E#%4),G#6
D&
3.1.2. Phân công các đầu vào-ra cho PLC
SJ/4% SCh
'L Œv&v
'L* Œv&_
'†?? Œv&Y
58-G… Œv&b
19
58-GI Œv&a
58-G5 Œv&c
58-G{PR/> = Œv&d
-*@ 3†#?)†_ Œv&e
-*@ 3†#?)†Y Œ_&v
-*@ 3†#?)†b Œ_&_
Q@_/b ŒY&v
Q@Y/b ŒY&_
Q@b/b ŒY&Y
Q@*/,$ •t_vv
•G =* •t_vY
•G =/ •t_va
•G = •t_vd
SJ/ SCh
5(*/>#
_
3.2.1. Giới thiệu về PLC S7-300 của hãng Siemens
[]5^Le^bvv/00/#?>%*J/\
^5[•#,/\b_Y–•b_Y5b_b5b_ab_a–•b_a5b_c^Y{[
b_d^Y{[b_fZ
^•0/#?$)/L•7/K*$)/ >l\L•bY_L•beaZ
^•0/#?G9–•
^•0/#?/+(5[
^•0/#?/>[Lbve*/>Ya<{50/#?,02Y…
c…_v…&
50/#? !Af0/#?L•l–•l5[RA
*85[•%,&•|0/#? !#$F
*8\0/#?/>#%#_0/#?5[•#%#Y0/#?,-a&5
0/#? !?#4%0:#%R@PChJ/
0/#?‘4%$)/&S4=5[•b_c^Y{[b_d^Y{[3@Ch
:B0/#?
5/G[]5 !,i*J+L?*e
/\
^•0/#?/>\[Lbvec…
^•0/#?5[•b_d^Y{[
^•0/#?$)/4%{ŒbY7{5Ya<03D_v$)/4%4%
$)/4%#%$)/&
^•0/#?J/{~bY7{5Ya<lv&c…03Df$A/J/4%
$)/#%$)/&
3.2.2. Viết chương trình điều khiển
24
25