Week 5 1_advance_electro_hydraulics_design1
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This document discusses hydraulic circuit design for machines with multiple actuators. It provides tips for identifying the sequence of actuator movements and sensor status to design the circuit. As an example, it describes a drilling machine with two double acting cylinders - one to clamp the workpiece and one to control drilling. The sequence is given as cylinder A extends, then B extends, B retracts, and A retracts. Sensors are identified for the extended/retracted positions of each cylinder.
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Hy friends thank you all of you for your love. please see my slideshare. I have made simple and easy to understand for all students. and aslo i have been present same slide on my youtube channel "optometrist Nepal" so if you have any difficult to understand visit in my channel.
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Pascal's law states that pressure applied anywhere in an enclosed incompressible fluid is transmitted equally in all directions. Reynolds number determines the type of fluid flow as either laminar or turbulent based on flow velocity, pipe diameter, fluid density, and dynamic viscosity. Bernoulli's principle states that the total energy in a fluid system is constant, relating pressure, velocity, and height according to Bernoulli's equation.
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Pressure arises from gravitational force between an object's mass and the Earth. It is measured as force per unit area. Pressure increases with increasing force or decreasing area. Pressure in fluids also depends on height and density, increasing with greater height. Most pressure transducers measure differential pressure between two input ports. Gauge pressure indicates pressure above atmosphere, while absolute pressure uses vacuum as a reference. Hydraulic power is determined by pressure, flow rate, and mechanical power delivered to a load. Greater pressure or flow rate results in higher hydraulic power input to a cylinder.
Week 1 1_introduction
This document outlines the course content for a fluid power systems course. The course will cover hydraulic systems, pneumatic systems, electrofluid power systems, and programmable logic controllers. Students will learn to explain, design, analyze, and simulate hydraulic, pneumatic, and electrofluid power systems. Assessment includes a midterm exam, laboratory work, project and presentation, and a final exam. The document provides references and discusses applications of hydraulic, pneumatic, and fluid power systems.
Week 11 1_plc_programming_and_repeated_sequence
The document outlines the sequence of operations for a single solenoid valve. It identifies four relay groups labeled k1 through k4 that will operate in sequence, with each group turning on the next. It provides the logic for starting each relay group, including which sensors will trigger which relays to turn on in series or parallel, and how the previous groups will turn off once a new group is activated. The overall process involves starting with k1, then proceeding to k2, k3, and finally k4, with each group activating the next and turning off prior groups once its sequence is complete.
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Week 5 1_advance_electro_hydraulics_design1
- 2. More than 1 actuator 1 cylinder needs 1 valve Tips for circuit design: ◦Identify sequence of movement ◦Identify limit switch/sensor status
- 3. Example: A hydraulic actuated drilling machine contains two double acting cylinders (DACs). When the work piece is located at its position, cylinder A will clamp the work piece. Then, the drilling process starts, where the spindle is controlled by cylinder B. After completion of drilling, cylinder B will retract to the initial position, before the clamping cylinder retracts. Sequence: A (extend) -> B (extend) - > B (retract) -> A (retract)
- 4. Identify sequence of movement A+ B+ B- A- F=0 F=0 Cylinder A Cylinder B A 0 A 1 B 0 B 1
- 5. Make the group A group must contain different elements 1 group represents 1 coil A+ B+ B- A- K1 K2
- 6. Identify limit switch/sensor status A+ B+ B- A- A1 B1 B0 A0 F=0 F=0 Cylinder A Cylinder B A 0 A 1 B 0 B 1 <= Actions <= Sensors
- 7. Rephrasing the sequence and limit switch/sensor status A1 B0 A+ B+ B- A- Start B1 A0 Right side of circuit Left side of circuit
- 9. 2 coil for 2 groups 4 solenoid for Y1, Y2, Y3 & Y4
- 11. B+ K1 + A1
- 12. B- K2 + B1 K2 due to changing group
- 13. A- K2 + B0