mechanical engineering lab.doc
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8/11/2019 Mechanical Engineering Lab.doc
1/17
Alexandria University
Faculty of Engineering
Mechanical Engineering Department
Hydraulics Lab ( thyear !
Mechanical Engineering Lab
Hydraulics
4thYear
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8/11/2019 Mechanical Engineering Lab.doc
2/17
Alexandria University
Faculty of Engineering
Mechanical Engineering Department
Hydraulics Lab ( thyear !
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8/11/2019 Mechanical Engineering Lab.doc
3/17
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8/11/2019 Mechanical Engineering Lab.doc
4/17
Alexandria University
Faculty of Engineering
Mechanical Engineering Department
Hydraulics Lab ( thyear !
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8/11/2019 Mechanical Engineering Lab.doc
5/17
Alexandria University
Faculty of Engineering
Mechanical Engineering Department
Hydraulics Lab ( thyear !
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8/11/2019 Mechanical Engineering Lab.doc
6/17
Alexandria University
Faculty of Engineering
Mechanical Engineering Department
Hydraulics Lab ( thyear !
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8/11/2019 Mechanical Engineering Lab.doc
7/17
Alexandria University
Faculty of Engineering
Mechanical Engineering Department
Hydraulics Lab ( thyear !
Components of the circuit :
"#Atmospheric $eservoir
%-Fixed Displacement &ump
'-&ressure auge-&ressure $elief )alve
*-)ariable .hrottle )alve
Describtion of the circuit :
/tudy the performance of a direct-acting pressure relief valve by
close the throttle valve completely then 0 unload the pressure
relief valve 1 /et the pressure relief valve approximately to *2bar then 0 open the throttle valve completely 1 close the throttle
valve in several steps 0 measure and note do+n the system
pressure and the flo+ rate through the pressure relief valve 1
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8/11/2019 Mechanical Engineering Lab.doc
8/17
Alexandria University
Faculty of Engineering
Mechanical Engineering Department
Hydraulics Lab ( thyear !
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8/11/2019 Mechanical Engineering Lab.doc
9/17
Alexandria University
Faculty of Engineering
Mechanical Engineering Department
Hydraulics Lab ( thyear !
Normal Circuits
Components of the circuit :
"#Atmospheric $eservoir
%#Fixed Displacement &ump
'#&ressure $elief )alve
#3%-4ay 56 - Lever +ith /pring $eturn*-Double-Acting 7ylinder +ith ad8ustable 7ushion
,#Filter
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8/11/2019 Mechanical Engineering Lab.doc
10/17
Alexandria University
Faculty of Engineering
Mechanical Engineering Department
Hydraulics Lab ( thyear !
Regeneratie Circuit
Describtion of the circuit :
/tudy the behavior of a regenerative circuit and to compare it
+ith that of a normal circuit by using the 3% D7) as a '3% D7)
(by plugging one of its ports! 0 extend the double-acting cylinderand notice the extension speed and the pressure upstream and
do+nstream the cylinder 1 Using the 3% D7) normally 0 extend
the double-acting cylinder and notice the extension speed and
the pressures upstream and do+nstream the cylinder1
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8/11/2019 Mechanical Engineering Lab.doc
11/17
Alexandria University
Faculty of Engineering
Mechanical Engineering Department
Hydraulics Lab ( thyear !
Extension
.ime
& do+nstream
(bar!
& upstream
(bar!
%1*2*9*9$egenerative
circuit
%1:;2*95ormal circuit
E!tension time :
. regenerative < . normal
"orce :For regenerative circuit =
& > Ac ? F @ & ( Ac # Ar !
F ? & > Ac # & ( Ac # Ar !
F ? & > Ar
For normal circuit =
F ? & > Ac
Ac Ar
F regenerative < F normal
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8/11/2019 Mechanical Engineering Lab.doc
12/17
Alexandria University
Faculty of Engineering
Mechanical Engineering Department
Hydraulics Lab ( thyear !
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8/11/2019 Mechanical Engineering Lab.doc
13/17
Alexandria University
Faculty of Engineering
Mechanical Engineering Department
Hydraulics Lab ( thyear !
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8/11/2019 Mechanical Engineering Lab.doc
14/17
Alexandria University
Faculty of Engineering
Mechanical Engineering Department
Hydraulics Lab ( thyear !
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8/11/2019 Mechanical Engineering Lab.doc
15/17
Alexandria University
Faculty of Engineering
Mechanical Engineering Department
Hydraulics Lab ( thyear !
Circuit #
Components of the circuit :
"#7ompressor
%#Accumulator
'#Filter
#&ressure $egulator
*#'3%-4ay 57 - El1 7ontrol0 &ush Button +ith /pring $eturn
,#&ilot Line
;#/ilencer:#*3%-4ay 57 # &ilot 6perated
9#Double-Acting %-7ushion 7ylinder
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8/11/2019 Mechanical Engineering Lab.doc
16/17
Alexandria University
Faculty of Engineering
Mechanical Engineering Department
Hydraulics Lab ( thyear !
Circuit $
Components of the circuit :
" # 7ompressor
% # Accumulator
' # Filter
# &ressure $egulator
* # '3%-4ay 57 - El1 7ontrol0 &ush Button +ith /pring $eturn
, # *3%-4ay 57 # &ilot 6perated; # /ilencer
: # )ariable 5on $eturn .hrottle )alve
9 # &ilot Line
"2 # Mechanical &osition /ensor
"" # Double-Acting %-7ushion 7ylinder
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8/11/2019 Mechanical Engineering Lab.doc
17/17
Alexandria University
Faculty of Engineering
Mechanical Engineering Department
Hydraulics Lab ( thyear !
Number%ectionName*"9""Mar+an Mohamed /haaban Abou Chashaba
*'%""Mostafa /haaban Mahmoud Hal+ag
;:%Ahmed Fa+i Al /oliman
'%*;Amr Adel Abdel-aal Elsayed Hal+ag
*%9""Mostafa Elsayed Mohamed Elsayed
*'9""Mostafa Mahgoub Ahmed Hassan
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