Technology Interactions ‹ Chapter Title Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.

Technology InteractionsTechnology Interactions

Hydraulic and pneumatic systems use fluid power.

Technology Interactions Chapter 16 Hydraulics & Pneumatics Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.

Fluid PowerFluid PowerFluid power is the use of liquids or gases under pressure to move objects or perform other tasks.

Any substance that flows is a fluid. Liquids and gases are both fluids.

Fluids only have power when they are flowing.

Fluids can be put under pressure and moved through pipes or hoses to where they are needed.

Technology Interactions Chapter 16 Hydraulics & Pneumatics Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.

MatterMatterAll objects are made of matter.

The three states of matter are

♦ solid

♦ liquid

♦ gas

The state of matter is determined by how tightly its molecules are held together.

Technology Interactions Chapter 16 Hydraulics & Pneumatics Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.

SolidsSolids

The molecules in solids

♦ are very strongly linked

♦ are hard to compress

♦ maintain both their volume and shape

Technology Interactions Chapter 16 Hydraulics & Pneumatics Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.

LiquidsLiquids

The molecules in liquids

♦ are more loosely linked

♦ are hard to compress

♦ maintain their volume but not their shape

Technology Interactions Chapter 16 Hydraulics & Pneumatics Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.

GasesGases

The molecules in gases

♦ are very loosely linked

♦ are easy to compress

♦ do not maintain either their shape or volume

Technology Interactions Chapter 16 Hydraulics & Pneumatics Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.

Hydraulic SystemsHydraulic SystemsHydraulic systems use oil or another liquid.

Liquids are very difficult to compress, so they can be used to transfer very powerful forces from one place to another.

Hydraulic systems are ideal when high power and accuracy are required.

Technology Interactions Chapter 16 Hydraulics & Pneumatics Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.

Parts of a Hydraulic SystemParts of a Hydraulic SystemA simple hydraulic system consists of:

♦ Fluid

♦ Pump-Provides pressure needed to move the liquid throughout the system

♦ Reservoir-Where liquid is stored

♦ Relief valve-Limits pressure in the system to a safe amount

Technology Interactions Chapter 16 Hydraulics & Pneumatics Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.

Parts of a Hydraulic SystemParts of a Hydraulic System

• A simple hydraulic system consists of:

♦ Control valve-Directs liquid to the right location

♦ Single-acting cylinder-

♦ Transmission lines-Carry the liquid

Technology Interactions Chapter 16 Hydraulics & Pneumatics Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.

Uses of Hydraulic SystemsUses of Hydraulic Systems

Manufacturing

Transportation

Construction

Agriculture

Entertainment industry

Technology Interactions Chapter 16 Hydraulics & Pneumatics Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.

Pneumatic SystemsPneumatic SystemsPneumatic systems use a gas, usually air.

Pressure is built up by compressing the gas.

Pneumatic systems can usually be lighter weight than hydraulic systems.

The air they use is always available and since it is not a hazardous material, there is nothing to clean up.

Technology Interactions Chapter 16 Hydraulics & Pneumatics Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.

Parts of a Pneumatic SystemParts of a Pneumatic System

A simple pneumatic system consists of:

♦ Compressor-Squeezes the air/Draws air into the chamber

♦ Receiver-Stores the air from the compressor

♦ Check valve-Allows pressurized air to enter the system/Prevents loss of air

Technology Interactions Chapter 16 Hydraulics & Pneumatics Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.

Parts of a Pneumatic SystemParts of a Pneumatic System

A simple pneumatic system consists of:

♦ Control valve-Directs air to the proper location/Regulates air flow

♦ Actuator-Changes air pressure to mechanical motion

Technology Interactions Chapter 16 Hydraulics & Pneumatics Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.

Uses of Pneumatic SystemsUses of Pneumatic Systems

Construction

Manufacturing

Packaging

Health care

Technology Interactions Chapter 16 Hydraulics & Pneumatics Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.

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