## ME2305 APPLIED HYDRAULICS AND PNEUMATICS Lecture Notes for MECH - Fifth (5th) Semester

ME2305 Applied Hydraulics and Pnematics Lecture Notes

Syllabus :

UNIT I FLUID POWER SYSTEMS AND FUNDAMENTALS
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
fittings.

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.