produce rotational motion.Air driven motors and their concept to use air as an energy carrier is not a new idea. Historically, it has been applied since the 19th century to power mine locomotives. The most recent development uses pressurized air as fuel in an engine. The advantage of air motors lies in the fact that they are easy to use, maintain and handle. They are available in different types of designs and are used for many purposes in different applications.
- Air motors generate very less heat in comparison to electric motors.
- Air motors can easily be transported to areas where electricity is not available
Types/Designs of air motors
Many designs of air driven motors are available. Axial piston, rotary vane, radial piston, V type, diaphragm, turbine and the generator are most commonly used. The reason for popularity of these designs is the added efficiency they provide in comparison to other air motors. Apart from being efficient air motor designs, their life is greater and they need less conservation. Vane air motors are the most popular of the air motor designs.
Piston air motors are the most efficient type of air powered motors. They are used in applications where high power as well as high starting torsion is required. They are also applied where accurate speed control is needed. In piston air motors, there are two to six cylinders attached either radially or axially. High rotation is produced by pressure that acts on the pistons which reciprocate in cylinders.
The advantage of piston air motors is derived from the fact that their uses are many fold. Also, they are more user friendly. The volume of air needed is less which means less air leaks. You get more precise control with piston air motors which makes them ideal for low speed – high torque applications. Speed of motor can be adjusted to fine limits. Reversing is also possible. Piston air motors give near instant response even under load. These factors make piston air motors highly useful and apt to be used in almost all conditions. Efficiency of piston air motors ensures that they give the maximum output while requiring little care.