Hydraulics and Pheumatics
ME8694 HYDRAULICS AND PNEUMATICS
UNIT I FLUID POWER PRINICIPLES AND HYDRAULIC PUMPS
Introduction to Fluid power – Advantages and Applications – Fluid
power systems – Types of fluids - Properties of fluids and selection – Basics
of Hydraulics – Pascal’s Law – Principles of flow - Friction loss – Work, Power
and Torque Problems, Sources of Hydraulic power : Pumping Theory – Pump
Classification – Construction, Working, Design, Advantages, Disadvantages,
Performance, Selection criteria of Linear and Rotary – Fixed and Variable
displacement pumps – Problems.
UNIT II HYDRAULIC ACTUATORS AND CONTROL COMPONENTS
Hydraulic Actuators: Cylinders – Types and construction,
Application, Hydraulic cushioning – Hydraulic motors - Control Components :
Direction Control, Flow control and pressure control valves – Types,
Construction and Operation – Servo and Proportional valves – Applications –
Accessories : Reservoirs, Pressure Switches – Applications – Fluid Power ANSI
Symbols – Problems.
UNIT III HYDRAULIC CIRCUITS AND SYSTEMS
Accumulators, Intensifiers, Industrial hydraulic circuits –
Regenerative, Pump Unloading, Double- Pump, Pressure Intensifier, Air-over oil,
Sequence, Reciprocation, Synchronization, Fail-Safe, Speed Control, Hydrostatic
transmission, Electro hydraulic circuits, Mechanical hydraulic servo systems.
UNIT IV PNEUMATIC AND ELECTRO PNEUMATIC SYSTEMS
Properties of air – Perfect Gas Laws – Compressor – Filters,
Regulator, Lubricator, Muffler, Air control Valves, Quick Exhaust Valves,
Pneumatic actuators, Design of Pneumatic circuit – Cascade method – Electro
Pneumatic System – Elements – Ladder diagram – Problems, Introduction to
fluidics and pneumatic logic circuits.
UNIT V TROUBLE SHOOTING AND APPLICATIONS
Installation, Selection, Maintenance, Trouble Shooting and
Remedies in Hydraulic and Pneumatic systems, Design of hydraulic circuits for
Drilling, Planning, Shaping, Surface grinding, Press and Forklift applications.
Design of Pneumatic circuits for Pick and Place applications and tool handling
in CNC Machine tools – Low cost Automation – Hydraulic and Pneumatic power
packs.