Hydraulics and Pneumatic
Systems
Unit – 1
FLUID POWER PRINICIPLES AND HYDRAULIC PUMPS
1
,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.
2
,Fluid Power and Fluid Power Systems
Fluid Power
Fluid power is defined as the technology that deals with the
generation, control and transmission of power using
pressurized fluids (Liquid or Gas).
Fluid Power Systems
HYDRAULIC System (Liquid)
PNEUMATIC system (Gas)
3
, Types of fluid systems:
• Fluid transport systems: Objective is to deliver the fluid from
one location to another to accomplish some useful purpose.
Examples include pumping stations for pumping water to
homes, cross-country gas lines, etc.
• Fluid power systems: These are designed to perform work. In
fluid power systems, work is obtained by pressurized fluid
acting directly on a fluid cylinder or a fluid motor.
A cylinder produces a force resulting in linear motion,
whereas a fluid motor produces a torque resulting in rotary
motion.
4
Systems
Unit – 1
FLUID POWER PRINICIPLES AND HYDRAULIC PUMPS
1
,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.
2
,Fluid Power and Fluid Power Systems
Fluid Power
Fluid power is defined as the technology that deals with the
generation, control and transmission of power using
pressurized fluids (Liquid or Gas).
Fluid Power Systems
HYDRAULIC System (Liquid)
PNEUMATIC system (Gas)
3
, Types of fluid systems:
• Fluid transport systems: Objective is to deliver the fluid from
one location to another to accomplish some useful purpose.
Examples include pumping stations for pumping water to
homes, cross-country gas lines, etc.
• Fluid power systems: These are designed to perform work. In
fluid power systems, work is obtained by pressurized fluid
acting directly on a fluid cylinder or a fluid motor.
A cylinder produces a force resulting in linear motion,
whereas a fluid motor produces a torque resulting in rotary
motion.
4
