Introduction to Fluid Power

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Presentation transcript:

Introduction to Fluid Power Chapter 1 Introduction to Fluid Power The Fluid Power Field

Define the terms fluid power, hydraulic system, and pneumatic system. Objectives Define the terms fluid power, hydraulic system, and pneumatic system. Explain the extent of fluid power use in current society and provide several specific examples. List the advantages and disadvantages of fluid power systems. Discuss scientific discoveries and applications important to the historical development of the fluid power industry.

Definition of Fluid Power A fluid power system consists of a prime mover drives a pump to pressurize a fluid, which is transmitted through lines to an actuator that performs the useful work.

Definition of Fluid Power Fluid power systems are generally grouped under two broad classifications: – Hydraulics – Pneumatics Hydraulic systems generally use oil as the system fluid, while pneumatic systems use air.

Comparisons of hydraulic and pneumatic Fluid Power Systems Comparisons of hydraulic and pneumatic systems may be done by analyzing: – Operating pressure Accuracy of actuator movement Actuator speed Component weight System cost

Hydraulic systems are accurate, operate at Fluid Power Systems Hydraulic systems are accurate, operate at high pressures, are slow, and have strong components. (Brand X)

Compared to hydraulic systems, pneumatic systems: Fluid Power Systems Compared to hydraulic systems, pneumatic systems: – Are less accurate – Are faster – Have components that are lighter in weight

Advantages of both hydraulic and pneumatic Fluid Power Systems Advantages of both hydraulic and pneumatic systems include easy control of: – Force Torque Speed Direction of actuators

earliest applications of fluid power. Some industries still History of Fluid Power The natural movement of air and water was used in the earliest applications of fluid power. Some industries still use this natural movement. Glowimages

Wind and watermills were used as prime History of Fluid Power Wind and watermills were used as prime movers to provide power until well into the Industrial Revolution, which occurred in the eighteenth and nineteenth centuries.

Fluid power systems are used extensively throughout business and Fluid Power Today Fluid power systems are used extensively throughout business and industry today. Glowimages

Few products are not influenced in some way by fluid power systems. Fluid Power Today Few products are not influenced in some way by fluid power systems.

Fluid power in various forms is widely used in everyday life. Fluid Power Today Fluid power in various forms is widely used in everyday life. PhotoDisc

Glossary Actuator – A component used to convert the energy in hydraulic fluid or compressed air into mechanical linear or rotary motion

Glossary Fluid power – The transferring, controlling, and converting of energy using hydraulic and pneumatic systems. Hydraulics – The study and technical application of liquids in motion, especially oils and other blended liquids used in industrial systems. © Goodheart-Willcox Co., Inc. 27 Permission granted to reproduce for educational use only.