Lab 5 - Meter OUT Flow Control CIrcuit W21
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Lab 5 - Meter OUT Flow Control (during extension) 2021W
Humber College Institute of Technology and Advanced Learning
School of Applied Technology
Electromechanical Engineering – Automation and Robotics
ATMN 200 - INDUSTRIAL HYDRAULICS
Laboratory No. 5
Meter OUT Flow Control (during extension)
Professor Name :
Satish Gandhi
Student Name and No. :
Vaibhav Tailor N01395367
Lab DAY and TIME:
Friday 3:20PM
Submission Date :
Friday March 5, 2021
Page
1
of
5
Lab 5 - Meter OUT Flow Control (during extension) 2021W
Introduction:
In this 5
th
lab exercise, the students will assemble a hydraulic circuit, set the pressure and flow to control the
speed of hydraulic actuator. The students will control the forward speed of the actuator by means of METER-
OUT method.
Instructions for practical assembly and hydraulic circuit operation:
NOTE:
Mask, Safety glasses and safety shoes must be worn at all times in the hydraulic
lab class.
Procedures:
1.
Design/draw a
METER OUT extension flow control circuit on automation studio using the
following components;
?
1x – horizontal cylinder
1x –Variable non-return
Throttle valve OR (flow
control valve with check
valve)
1x – pressure gage
1x – flow meter
1x – Check valve
Note:
start your hydraulic circuit design using the common (default) component
under the
hydraulic bench as per shown on your lab No. 1.
2.
Test run your circuit in the simulation mode. Observe the flow path (blue in color) during flow to the
actuator.
3.
Show your
circuit simulation
on Automation studio and ask for approval by the instructor, then print
it.
Page
2
of
5
?
Lab 5 - Meter OUT Flow Control (during extension) 2021W
4.
Also, print the whole lab package from your blackboard, together with simulation print out, start
building your circuit in hydraulic bench.
5.
Once your build circuit is approve by instructor, turn on the unit;
5.a Adjust the system pressure as CHART “A” (250 psi) from the relief valve.
5.b Switch ON/OFF the solenoid operated direction control valve “A OFF B” to extend and
retract
the rods of the actuators. Adjust the meter out flow control valves to obtain the 1 GPM flow out
of the actuator during the extension.
NOTE: Your lab instructor will demonstrate the correct procedure to ensure the
Flow set to GPM during extension.
6.
Fill in CHART A with the flow set reading set to 1 GPM as indicated.
7.
No further adjustment of the “FLOW CONTROL VALVES” is required to complete the circuit.
8.
Now increase the system pressure to
350 psi
and fill in the 2
nd
row of chart A.
9.
Again, increase the pressure to
500 psi
and complete the 3
rd
row of chart A.
NOTE:
The flow was originally set to 1 GPM with only 250 psi of pressure. As the system
Pressure rises, an increased flow will be observed in the circuit without adjusting the
Flow control valve.
CHART A - METER OUT FLOW CONTROL (During extension
)
Relief Valve
Pressure (psi)
Gage
Pressure
during extension
(psi)
FLOW
(GPM)
Extension
Time
(sec)
Retraction
Time
(sec)
250
290
Set to 1 GPM
4.2
2.72
350
420
Record increase
flow___1.25__?
2.92
1.58
500
590
Record increase
flow__1.75__?
2.26
1.20
Page
3
of
5
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Lab 5 - Meter OUT Flow Control (during extension) 2021W
Lab 5 – Meter OUT flow control circuit (During extension)
Page
4
of
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Lab 5 - Meter OUT Flow Control (during extension) 2021W
QUESTIONS:
(type your answers here, hand written answers won’t be accepted)
1.
What is the pressure reading measured on the rod side during extension of the actuator? Is there any
pressure reading difference from the relief valve pressure?
The Pressure reading during Extension were 290, 420, and 590 PSI. Yes, there is a pressure reading
difference in the relief Valve pressure.
2.
What are the factors that affect flow control?
There are Few Factors that affect the flow control
1.
The size of the orifice
2.
The pressure difference between the inlet and the outlet of the flow control
3.
The temperature of the fluid
3.
Which applications would require a METER-OUT control?
Gives positive speed control to actuators used in variable loading conditions (Magnitude and Direction)
Example:
-
Drilling
-
Sawing
-
Boring
-
Dumping Operation
4.
What are functions of check valves connected in parallel to FCV and Flow meter?
When the hydraulic oil is flows through on direction instead of going into the flow meter in different
direction. This allows it to have a clear route to the check valve and back into the flow meter.
5.
What would be maximum pressure measured on rod side during extension based on cylinder size used in
lab with system pressure of 500 psi? Show your calculations.
Simulation
Build Circuit
Circuit Sketch
(Free Hand)
Signatures
Page
5
of
5
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