ME2305 APPLIED HYDRAULICS AND PNEUMATICS Lecture Notes for MECH - Fifth (5th) Semester
ME2305 Applied Hydraulics and Pnematics Lecture Notes
Introduction to fluid power, Advantages of fluid power, Application of fluid power system.
Types of fluid power systems, Properties of hydraulic fluids – General types of fluids –
Fluid power symbols. Basics of Hydraulics-Applications of Pascals Law- Laminar and
Turbulent flow – Reynold’s number – Darcy’s equation – Losses in pipe, valves and
UNIT II HYDRAULIC SYSTEM & COMPONENTS
Sources of Hydraulic Power: Pumping theory – Pump classification – Gear pump, Vane
Pump, piston pump, construction and working of pumps – pump performance – Variable
displacement pumps. Fluid Power Actuators: Linear hydraulic actuators – Types of
hydraulic cylinders – Single acting, Double acting special cylinders like tanden, Rodless,
Telescopic, Cushioning mechanism, Construction of double acting cylinder, Rotary
actuators – Fluid motors, Gear, Vane and Piston motors.
UNIT III DESIGN OF HYDRAULIC CIRCUITS
Construction of Control Components : Directional control valve – 3/2 way valve – 4/2
way valve – Shuttle valve – check valve – pressure control valve – pressure reducing
valve, sequence valve, Flow control valve – Fixed and adjustable, electrical control
solenoid valves, Relays, ladder diagram. Accumulators and Intensifiers: Types of
accumulators – Accumulators circuits, sizing of accumulators, intensifier – Applications
of Intensifier – Intensifier circuit.
UNIT IV PNEUMATIC SYSTEMS AND COMPONENTS
Pneumatic Components: Properties of air – Compressors – Filter, Regulator, Lubricator
Unit – Air control valves, Quick exhaust valves, pneumatic actuators. Fluid Power Circuit
Design, Speed control circuits, synchronizing circuit, Penumo hydraulic circuit,
Sequential circuit design for simple applications using cascade method.
UNIT V DESIGN OF PNEUMATIC CIRCUITS
Servo systems – Hydro Mechanical servo systems, Electro hydraulic servo systems and
proportional valves. Fluidics – Introduction to fluidic devices, simple circuits, Introduction
to Electro Hydraulic Pneumatic logic circuits, ladder diagrams, PLC applications in fluid
power control. Fluid power circuits; failure and troubleshooting.