Pneumatic+systems

Vinh Nguyen 06/08/2010 Ms: Marx

Pneumatic systems


===Pneumatic systems It is extremely dangerous if you do not know what you are doing or if you are using components that are not rated for the correct pressures the system could explode causing serious injury and even death. Pneumatics should only be using in a robot by an experienced builder or a pneumatics specialist===

General Ideas-

Pneumatic systems employ gas that is compressed under extremely high pressure. There are three main gases used in the construction of a robot pneumatic weapon system; Carbon Dioxide (CO2), Nitrogen (N2), and High Pressure Air (HPA). Nitrogen and HPA can be compressed in a tank to upwards of 5000 psi (pounds per square inch) but require larger tanks. CO2 on the other hand liquefies at around 850 psi which allows it to take up less space and therefore need a smaller tank. CO2 exhibits some really unique properties under pressure and when it is vented. Without going into the theories of thermodynamics let's suffice it to say that as pressure drops so does the temperature and lower temperatures create lower pressures to a point of equilibrium. In other words, a drop in pressure results in a drop in temperature but that same pressure will not come back until the ambient temperature rises back to the same point.

Force is the end goal for everyone using pneumatics. It is what does all the work for us. Force is calculated by the Pressure times the Area. The Area is calculated by using basic Algebra with regards to the Bore. To get the Area we take half the bore and square it then multiply it by Pi (hmmmm... that sounds an awful lot like the area of a circle "Pi(r)^2"). Once we have the Area we multiply it by the pressure to get the force. Here they are again in easy format: Force = Area x Pressure Area = (1/2 Bore)^2 x Pi



=How Pneumatic Systems Work=

The Reservoir- The reservoir is used to hold the fuel for the compressor The Compressor- A compressor consists of a piston inside a cylinder The Pipes- The pipes leading from the compressor to the point of power generation are where the most leakage in pressure occurs The compressor- The compressor receives air from the reservoir and increases it from 100 psi until a door leading into the pipes opens

=What Are Pneumatic Systems Used For?=

Pneumatic Systems comprise a huge number of technologies and integrations that use pressurized air to either power or drive them. In the case of pneumatic controls and instrumentation, pneumatics are used to communicate process variables commands to control valves. Pneumatic logic is used in many machine applications.



Credits:

http://www.teamdavinci.com/understanding_pneumatics.htm

http://www.ehow.com/how-does_5301034_pneumatic-systems-work.html
http://www.ehow.com/about_5407208_pneumatic-systems-used-for_.html