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Encyclopedia > Pneumatics

Pneumatics, a subsection of an area called fluid power, is the use of pressurized air to effect mechanical motion. Image File history File links Broom_icon. ... Fluid power is the technology that deals with the generation, control, and transmission of pressurized fluids. ...


Pneumatic power is used in industry, where it is common to have industrial factory unit plumbed for compressed air. It also has applications in, among other things, dentistry, construction, and mining. Pneumatic power users need not worry about hazardous leakages as the fuel is commonly just air, although other compressed gases, such as carbon dioxide, may be used. Compressed air is used to refer to: Pneumatics, the use of pressurized gases to do work, as used in the Air car Breathing gas, often used in scuba diving, also to inflate buoyancy devices Compressed air can also be used for cooling using a vortex tube. ... This article is about the dental profession. ... For other uses, see Construction (disambiguation). ... This article is about mineral extractions. ... Carbon dioxide (chemical formula: ) is a chemical compound composed of two oxygen atoms covalently bonded to a single carbon atom. ...



Examples of pneumatic systems:

Contents

Pneumatic tools are tools driven by compressed air. ... The word jackhammer is also used in the name of the type of combat shotgun called the Pancor Jackhammer. ... Pneumatic Gun in Australia Nail Gun in use A nail gun or nailgun is a type of tool used to drive nails into wood or some other kind of material. ... Electrical switches. ... A pneumatic actuator converts energy (in the form of compressed air, typically) into motion. ... A gas compressor is a mechanical device that increases the pressure of a gas by reducing its volume. ... The Roots blower is one example of a vacuum pump A vacuum pump is a pump that removes gas molecules from a sealed volume in order to leave behind a partial vacuum. ... Rectal barostat balloon, partially inflated A barostat is a pneumatic pump used in Neurogastroenterology research. ... Neurogastroenterology is a research area in the field of Gastroenterology which regards interactions of the central nervous system (brain) and the gut - the so-called brain-gut axis. ... Cable jetting is a technique to install cables in ducts[1]. It is commonly used to install cables with optical fibers in underground polyethylene ducts and is an alternative to pulling. ... Pneumatic tubes, also known as capsule pipelines or Lamson tubes, are systems in which cylindrical containers are propelled through a network of tubes by compressed air or by vacuum. ... Air brakes are used in trucks, buses, trailers and semi-trailers. ... Autobus redirects here. ... For other uses, see Truck (disambiguation). ... Piping diagram from 1920 of a Westinghouse E-T Air Brake system. ... For other uses, see Train (disambiguation). ... Main article: Compressed air energy An air engine or air motor is a device for converting potential energy from compressed air into kinetic energy to drive other machines. ... Lego pneumatics is a variety of Lego bricks which utilise air pressure and specialised components to perform various actions utilising the principles of pneumatics. ... A typical die-cast spud gun. ... Air guns are weapons that propel a bullet using compressed air or another gas, possibly liquefied. ... This was a weapon used by the Royal Navy in World War II. It used compressed air or steam to fire a Mills Bomb (type of grenade) at enemy aircraft. ...

Comparison to hydraulics

Both pneumatics and hydraulics are applications of fluid power. Pneumatics uses air, which is compressible, while hydraulics uses relatively incompressible liquid media such as oil. Most industrial pneumatic applications use pressures of about 80 to 100 pounds per square inch (psi) (500 to 700 kilopascals). Hydraulics applications commonly use from 1,000 to 5,000 psi (7 to 35 MPa), but specialized applications may exceed 10,000 psi (70 MPa). Fluid power is the technology that deals with the generation, control, and transmission of pressurized fluids. ... Table of Hydraulics and Hydrostatics, from the 1728 Cyclopaedia. ... The pascal (symbol Pa) is the SI unit of pressure. ...


Advantages of pneumatics

Clean

  • Air is used by a machine & is then exhausted to the atmosphere - no return line necessary.
  • Any leaks will be of air (which is much less of a problem than oil leaks in Hydraulics).

Availability

  • Air is freely available in the pneumatics
  • Most factories are pre-plumbed for compressed air distribution - which makes it very easy to set up a manufacturing process

Simplicity of Design And Control

  • Machines are easily designed using standard cylinders & other components. Control is as easy as its simple ON - OFF type control

Reliability

  • Pneumatic systems tend to have long operating lives and require very little maintenance.
  • Because air is compressable, the equipment is less likely to be damaged by shock. The air in pneumatics absorbs excessive force, whereas the fluid of hydraulics directly transfers force.

Storage

  • Compressed Air can be stored, allowing the use of machines when electrical power is lost.

Safety

  • Very small fire hazard (compared to Hydraulic Oil)
  • Machines can be designed to be overload safe.

Advantages of hydraulics

  • Fluid does not absorb any of the supplied energy.
  • The hydraulic working fluid is basically incompressible, leading to a minimum of spring action. When hydraulic fluid flow is stopped, the slightest motion of the load releases the pressure on the load; there is no need to "bleed off" pressurised air to release the pressure on the load.

For other uses, see Spring. ...

Pneumatic Logic

Main article: Fluidics

Pneumatic logic systems are often used to control industrial processes, consisting of primary logic units such as: Fluidics is science and technology of the application of a fluid or compressible medium to transmit energy and signals. ...

  • And Units
  • Or Units
  • 'Relay or Booster' Units
  • Latching Units
  • 'Timer' Units

Pneumatic logic is a reliable and functional control method for industrial processes. In recent years, these systems have largely been replaced by electrical control systems, due to the smaller size and lower cost of electrical components. Pneumatic devices are still used in processes where compressed air is the only energy source available or upgrade cost, safety, and other considerations outweigh the advantage of modern digital control. AND Logic Gate In logic and mathematics, logical conjunction (usual symbol and) is a two-place logical operation that results in a value of true if both of its operands are true, otherwise a value of false. ... OR logic gate. ...


External links

Look up Pneumatics in
Wiktionary, the free dictionary.

Wiktionary (a portmanteau of wiki and dictionary) is a multilingual, Web-based project to create a free content dictionary, available in over 151 languages. ...

See also

This page is a candidate to be copied to Wiktionary. ... Table of Hydraulics and Hydrostatics, from the 1728 Cyclopaedia. ... Fluidics is science and technology of the application of a fluid or compressible medium to transmit energy and signals. ...

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