Lab 5 - Meter OUT Flow Control CIrcuit W21

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Seneca College *

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Mechanical Engineering

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Jan 9, 2024

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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 5
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