Basics of Hydraulics and Pneumatics (BME755B)

Basics of Hydraulics and Pneumatics

Course Code BME755B 
CIE Marks 50
Teaching Hours/Week (L: T:P: S) 3:0:2:0 
SEE Marks 50
Total Hours of Pedagogy 40 
Total Marks 100
Credits 03 
Exam Hours 3
Examination nature (SEE) Theory

Module­1

Introduction to fluid power systems

Fluid power system: components, advantages and applications. Transmission of power at static and

dynamic states. Pascal’s law and its applications.

Fluids for hydraulic system: types, properties, and selection. Additives, effect of temperature and

pressure on hydraulic fluid. Seals, sealing materials, compatibility of seal with fluids. Fluid conditioning

through filters, strainers; sources of contamination and contamination control

Module­2

Pumps and actuators

Pumps: Classification of pumps, pumping theory of positive displacement pumps, construction and

working of Gear pumps, Vane pumps, Piston pumps, fixed and variable displacement pumps, Pump

performance characteristics, pump selection factors,

Actuators: Classification cylinder and hydraulic motors, Hydraulic cylinders, single and double acting

cylinder, cushioning, special types of cylinders, Construction and working of rotary actuators such as

gear, vane, piston motors, and Hydraulic Motor. Symbolic representation of hydraulic actuators

(cylinders and motors).

Accumulators: Types, selection/ applications of accumulators

Module­3

Components and hydraulic circuit design

Components: Classification of control valves, Directional Control Valves­symbolic representation,

constructional features of poppet, sliding spool, shuttle valve, and check valves.

Pressure control valves ­ types, direct operated types and pilot operated types.

Flow Control Valves ­compensated and non­compensated FCV, needle valve, temperature

compensated, pressure compensated, pressure and temperature compensated FCV, symbolic

representation.

Hydraulic Circuit Design: Control of single and Double ­acting hydraulic cylinder, regenerative circuit,

pump unloading circuit, double pump hydraulic system, counterbalance valve application, hydraulic

cylinder sequencing circuits, cylinder synchronizing circuit using different methods, speed control of

hydraulic cylinder metering in, metering out. Hydraulic circuit examples with accumulator.

Module­4

Module4: Pneumatic power systems

Introduction to Pneumatic systems: Pneumatic power system, advantages, limitations, applications,

Choice of working medium. Characteristics of compressed air and air compressors. Structure of

pneumatic control System, fluid conditioners­dryers and FRL unit.

Pneumatic Actuators: Linear cylinder – types of cylinders, working, end position cushioning, seals,

mounting arrangements, and applications.

Pneumatic Control Valves: DCV such as poppet, spool, suspended seat type slide valve, pressure

control valves, flow control valves, types and construction, use of memory valve, Quick exhaust valve,

time delay valve.

Module­5

Module5: Pneumatic control circuits

Simple Pneumatic Control: Direct and indirect actuation pneumatic cylinders, speed control of

cylinders ­ supply air throttling and exhaust air throttling.

Signal Processing Elements: Use of Logic gates – OR, AND, NOT and NAND gates in pneumatic

applications. Practical examples involving the use of logic gates.

Multi­ Cylinder Application: Coordinated and sequential motion control, motion and control

diagrams. Signal elimination methods, Cascading method­ principle, Practical application examples (up

to two cylinders).

Suggested Learning Resources:

Text Books:

1. Anthony Esposito, “Fluid Power with applications”, Pearson edition, 2000.

2. Majumdar S.R., “Oil Hydraulics”, Tala McGRaw HllL, 2002.

3. Majumdar S.R., “Pneumatic systems ­ Principles and Maintenance”, Tata McGraw­Hill, New Delhi,

2005

Reference Books:

1. John Pippenger, Tyler Hicks, “Industrial Hydraulics”, McGraw Hill International Edition, 1980.

2. Andrew Par, Hydraulics and pneumatics, Jaico Publishing House, 2005.

3. FESTO, Fundamentals of Pneumatics, Vol I, II and III.

4. Herbert E. Merritt, “Hydraulic Control Systems”, John Wiley and Sons, Inc.

5. Thomson, Introduction to Fluid power, Prentcie HaIl, 2004

6. John Watton, “Fundamentals of fluid power control”, Cambridge University press, 2012.