JSS2 Basic Technology Lesson Note on Hydraulic and Pneumatic Machines

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Hydraulic and Pneumatic Machines.

• Definition of hydraulic and pneumatic devices
• Examples of Hydraulic and Pneumatic devices
• Components of the machines

Hydraulic and Pneumatic devices

Hydraulic and pneumatic machines uses similar principle to operate, this principle is in the ability of water and air to expand immensely when subjected to pressure.

Hydraulic machines uses water to operate, while pneumatic machine uses air flow to operate. There are some among them that operate with use of both water and air.

Examples of hydraulic machines are:

• (i) hydraulic ram
• (ii) Garden sprinkler
• (iii) Water wheel
• (iv) hydraulic jack/ action
• (v) Turbines
• (vi) Hydraulic lift
• (viii) Force pumps

 PNEUMATIC DEVICES

Examples of pneumatic devices are:

• (i) Bicycle Pump.
• (ii) Car foot pumps
• (iii) Pneumatic drills. (Jackhammer)
• (iv) Air compressor
• (v) Air hammer
• (vi) Compression pump.
• (vii) Paint sprayer
• (viii) Vacuum pumps.
• (ix) Simple force pump.
• (x) Centrifuge pump.

PNEUMATIC DEVICES.

These are devices that use compressed air to do useful work. Some of these devices also use liquids to transmit energy. Examples already mentioned above.

(c) Description and components of some examples of Hydraulic and Pneumatic devices.

(1) Water wheel

This is a simple mechanical device which converts water power into rotary motion. It is sometimes also called gravity wheel. Falling water is used to turn the axle of the water wheel.

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