Play Video
1
Air Motor Video - Desoutter Tools
Air Motor Video - Desoutter Tools
::2012/06/12::
Play Video
2
Lego Pneumatic Motor
Lego Pneumatic Motor
::2013/10/12::
Play Video
3
Pneumatic Rotary Motor
Pneumatic Rotary Motor
::2011/09/21::
Play Video
4
THE KENDALL MOTOR - Compressed Air Turbine Powered Go Kart 2
THE KENDALL MOTOR - Compressed Air Turbine Powered Go Kart 2
::2012/06/23::
Play Video
5
FREE ELECTRICITY USING THE ALL AIR MOTOR!
FREE ELECTRICITY USING THE ALL AIR MOTOR!
::2011/12/20::
Play Video
6
How to make a Lego Pneumatic Engine
How to make a Lego Pneumatic Engine
::2013/09/13::
Play Video
7
Lego pneumatic motor
Lego pneumatic motor
::2010/08/20::
Play Video
8
Pneumatic Motor Prototype Animation
Pneumatic Motor Prototype Animation
::2013/08/26::
Play Video
9
Lego Pneumatic Engine - simple V6
Lego Pneumatic Engine - simple V6
::2012/09/27::
Play Video
10
Pneumatic Engine
Pneumatic Engine
::2010/09/11::
Play Video
11
Lego Technic Pneumatic Engines
Lego Technic Pneumatic Engines
::2012/09/30::
Play Video
12
Lego technic Eigenbau pneumatic motor
Lego technic Eigenbau pneumatic motor
::2014/09/13::
Play Video
13
Kremlin Rexson Air Motor Pneumatic - animated
Kremlin Rexson Air Motor Pneumatic - animated
::2013/11/26::
Play Video
14
Air compressed motor-bike / scooter à air comprimé - Ecologie
Air compressed motor-bike / scooter à air comprimé - Ecologie
::2012/06/07::
Play Video
15
2100 Series AutoDrills - 10 PCS, Air (Pneumatic) Motor and Controls - AutoDrill
2100 Series AutoDrills - 10 PCS, Air (Pneumatic) Motor and Controls - AutoDrill
::2013/08/23::
Play Video
16
Lego pneumatic motor prototype
Lego pneumatic motor prototype
::2013/06/18::
Play Video
17
Lego Technik 1 cylinder(small) Pneumatic motor
Lego Technik 1 cylinder(small) Pneumatic motor
::2010/11/14::
Play Video
18
Compressed Gas (Pneumatic) Engine
Compressed Gas (Pneumatic) Engine
::2012/02/24::
Play Video
19
Lego 3-cylinder pneumatic motor
Lego 3-cylinder pneumatic motor
::2010/08/22::
Play Video
20
2 zylinder lego pneumatic motor
2 zylinder lego pneumatic motor
::2009/04/17::
Play Video
21
LEGO pneumatic motor, 4 cilinder v2.0
LEGO pneumatic motor, 4 cilinder v2.0
::2008/11/17::
Play Video
22
Phoenix Tools-Beveling Cutters for pneumatic motor
Phoenix Tools-Beveling Cutters for pneumatic motor
::2013/12/16::
Play Video
23
Pneumatic Motor
Pneumatic Motor
::2012/11/21::
Play Video
24
Toroidal Pneumatic Motor - Casing Removed - High Speed Camera .24x playback
Toroidal Pneumatic Motor - Casing Removed - High Speed Camera .24x playback
::2013/02/12::
Play Video
25
2 zylinder lego pneumatic motor 2
2 zylinder lego pneumatic motor 2
::2009/04/17::
Play Video
26
Pneumatic Motor pneumatic air motor pneumatic motor design   pneumatic motor manufacturers
Pneumatic Motor pneumatic air motor pneumatic motor design pneumatic motor manufacturers
::2013/09/16::
Play Video
27
Pneumatic Motor from Aeolian Reed Organ
Pneumatic Motor from Aeolian Reed Organ
::2013/07/17::
Play Video
28
LEGO Pneumatic Air Motor
LEGO Pneumatic Air Motor
::2014/04/10::
Play Video
29
Capstone Project - Design and Fabrication of a Pneumatic Motor
Capstone Project - Design and Fabrication of a Pneumatic Motor
::2014/11/19::
Play Video
30
Pneumatic motor in player piano
Pneumatic motor in player piano
::2012/11/09::
Play Video
31
Lego pneumatic motor vaiheessa #2
Lego pneumatic motor vaiheessa #2
::2014/11/04::
Play Video
32
Ryan
Ryan's Pneumatic Motor
::2013/06/06::
Play Video
33
2-cylinder Lego pneumatic motor
2-cylinder Lego pneumatic motor
::2010/09/28::
Play Video
34
Fluid Mixer for IBC with pneumatic motor
Fluid Mixer for IBC with pneumatic motor
::2013/09/06::
Play Video
35
Pneumatic motor
Pneumatic motor
::2014/01/04::
Play Video
36
pneumatic motor
pneumatic motor
::2011/06/25::
Play Video
37
Pneumatic motor
Pneumatic motor
::2012/12/01::
Play Video
38
PSW Inertial (Pneumatic Motor) Spin Welder
PSW Inertial (Pneumatic Motor) Spin Welder
::2010/06/24::
Play Video
39
Lego pneumatic motor vaiheessa
Lego pneumatic motor vaiheessa
::2014/11/04::
Play Video
40
Pneumatic motor
Pneumatic motor
::2014/04/07::
Play Video
41
lego pneumatic motor i2
lego pneumatic motor i2
::2010/04/11::
Play Video
42
LEGO Motor DIY Part 4: Pneumatic Motorized Compressor
LEGO Motor DIY Part 4: Pneumatic Motorized Compressor
::2014/10/17::
Play Video
43
Compressed Air "Engine".
Compressed Air "Engine".
::2014/06/07::
Play Video
44
pneumatic motor
pneumatic motor
::2013/05/21::
Play Video
45
LEGO V8 pneumatic Engine. LPE, HIGH RPM!!!!!!!!
LEGO V8 pneumatic Engine. LPE, HIGH RPM!!!!!!!!
::2010/11/03::
Play Video
46
Lego Servo Motor Pneumatic Switch
Lego Servo Motor Pneumatic Switch
::2013/01/01::
Play Video
47
Lego pneumatic motor with 2 cylinder
Lego pneumatic motor with 2 cylinder
::2010/12/31::
Play Video
48
LEGO 2 cylinder pneumatic motor
LEGO 2 cylinder pneumatic motor
::2014/04/11::
Play Video
49
Шины Bridgestone Non-Pneumatic Tire Tokyo Motor Show 2011
Шины Bridgestone Non-Pneumatic Tire Tokyo Motor Show 2011
::2011/12/04::
Play Video
50
First Impressions Razor Electric Scooter E300 Motor Maximum Overdrive pneumatic tires Speeds up 15 m
First Impressions Razor Electric Scooter E300 Motor Maximum Overdrive pneumatic tires Speeds up 15 m
::2014/08/09::
NEXT >>
RESULTS [51 .. 101]
From Wikipedia, the free encyclopedia
Jump to: navigation, search
The Victor Tatin airplane of 1879 used a compressed-air engine for propulsion. Original craft, at Musée de l'Air et de l'Espace.
The first mechanically powered submarine, the 1863 French submarine Plongeur, used a compressed-air engine. Musée de la Marine (Rochefort).

A pneumatic motor or compressed air engine is a type of motor which does mechanical work by expanding compressed air. Pneumatic motors generally convert the compressed air energy to mechanical work through either linear or rotary motion. Linear motion can come from either a diaphragm or piston actuator, while rotary motion is supplied by either a vane type air motor or piston air motor.

Pneumatic motors have existed in many forms over the past two centuries, ranging in size from hand-held turbines to engines of up to several hundred horsepower. Some types rely on pistons and cylinders; others use turbines. Many compressed air engines improve their performance by heating the incoming air or the engine itself. Pneumatic motors have found widespread success in the hand-held tool industry,[1] and continual attempts are being made to expand their use to the transportation industry. However, pneumatic motors must overcome inefficiencies before being seen as a viable option in the transportation industry.

Classification[edit]

Linear[edit]

In order to achieve linear motion from compressed air, a system of pistons is most commonly used. The compressed air is fed into an air-tight chamber that houses the shaft of the piston. Also inside this chamber a spring is coiled around the shaft of the piston in order to hold the chamber completely open when air is not being pumped into the chamber. As air is fed into the chamber the force on the piston shaft begins to overcome the force being exerted on the spring.[2] As more air is fed into the chamber, the pressure increases and the piston begins to move down the chamber. When it reaches its maximum length the air pressure is released from the chamber and the spring completes the cycle by closing off the chamber to return to its original position.

Piston motors are the most commonly used in hydraulic systems. Essentially, piston motors are the same as hydraulic motors except they are used to convert hydraulic energy into mechanical[3] energy.[4]

Piston motors are often used in series of two, three, four, five, or six cylinders that are enclosed in a housing. This allows for more power to be delivered by the pistons because several motors are in sync with each other at certain times of their cycle.

Rotary[edit]

Another type of pneumatic motor, known as a rotary vane motor, uses air to produce rotational motion to a shaft. The rotating element is a slotted rotor which is mounted on a drive shaft. Each slot of the rotor is fitted with a freely sliding rectangular vane.[4] The vanes are extended to the housing walls using springs, cam action, or air pressure, depending on the motor design. Air is pumped through the motor input which pushes on the vanes creating the rotational motion of the central shaft. Rotation speeds can vary between 100 and 25,000 rpm depending on several factors which include the amount of air pressure at the motor inlet and the diameter of the housing.[2]

Rotary motion vane-type air motors are used to start large industrial diesel or natural gas engines. Stored energy in the form of compressed air, nitrogen or natural gas enters the sealed motor chamber and exerts pressure against the vanes of a rotor. This causes the rotor to turn at high speed. Because the engine flywheel requires a great deal of torque to start the engine, reduction gears are used. Reduction gears create high torque levels with the lower amounts of energy input. These reduction gears allow for sufficient torque to be generated by the engine flywheel while it is engaged by the pinion gear of the air motor or air starter.

Application[edit]

A widespread application of small pneumatic motors is in hand-held tools, power ratchet wrenches, drills, sanders, grinders, cutters, and so on. Though overall energy efficiency of pneumatics tools is low and they require access to a compressed-air source, there are several advantages over electric tools. They offer greater power density (a smaller pneumatic motor can provide the same amount of power as a larger electric motor), do not require an auxiliary speed controller (adding to its compactness), generate less heat, and can be used in more volatile atmospheres as they do not require electric power.[5]

Historically, many individuals have tried to apply pneumatic motors to the transportation industry. Guy Negre, CEO and founder of Zero Pollution Motors, has pioneered this field since the late 1980s.[6] Recently Engineair has also developed a rotary motor for use in automobiles. Engineair places the motor immediately beside the wheel of the vehicle and uses no intermediate parts to transmit motion which means almost all of the motor's energy is used to rotate the wheel.[7]

History in transportation[edit]

The pneumatic motor was first applied to the field of transportation in the mid-19th century. Though little is known about the first recorded compressed-air vehicle, it is said that the Frenchmen Andraud and Tessie of Motay ran a car powered by a pneumatic motor on a test track in Chaillot, France, on July 9, 1840. Although the car test was reported to have been successful, the pair didn’t explore further expansion of the design.[8]

The first successful application of the pneumatic motor in transportation was the Mekarski system air engine used in locomotives. Mekarski’s innovative engine overcame cooling that accompanies air expansion by heating air in a small boiler prior to use. The Tramway de Nantes, located in Nantes, France, was noted for being the first to use Mekarski engines to power their fleet of locomotives. The tramway began operation on December 13, 1879, and continues to operate today, although the pneumatic trams were replaced in 1917 by more efficient and modern electrical trams.

American Charles Hodges also found success with pneumatic motors in the locomotive industry. In 1911 he designed a pneumatic locomotive and sold the patent to the H. K. Porter Company in Pittsburgh for use in coal mines.[9] Because pneumatic motors do not use combustion they were a much safer option in the coal industry.[8]

Many companies claim to be developing Compressed air cars, but none are actually available for purchase or even independent testing.

Tools[edit]

Impact wrenches, drills, firearms, die grinders, dental drills and other pneumatic tools use a variety of air engines or motors. These include vane type pumps, turbines and pistons.

Torpedoes[edit]

Most successful early forms of self-propelled torpedoes used high pressure compressed air, although this was superseded by internal or external combustion engines, steam engines, or electric motors.

Railways[edit]

Compressed air engines were used in trams and shunters, and eventually found a successful niche in mining locomotives, although eventually they were replaced by electric trains, underground.[10] Over the years designs increased in complexity, resulting in a triple expansion engine with air-to-air reheaters between each stage.[11] For more information see Fireless locomotive and Mekarski system.

Flight[edit]

Transport category airplanes, such as commercial airliners, use compressed air starters to start the main engines. The air is supplied by the load compressor of the aircraft's auxiliary power unit, or by ground equipment.

Water rockets use compressed air to power their water jet and generate thrust, they are used as toys.

Air Hogs, a toy brand, also uses compressed air to power piston engines in toy airplanes (and some other toy vehicles).

Automotive[edit]

There is currently some interest in developing air cars. Several engines have been proposed for these, although none have demonstrated the performance and long life needed for personal transport.

Energine[edit]

The Energine Corporation was a South Korean company that claimed to deliver fully assembled cars running on a hybrid compressed air and electric engine. The compressed-air engine is used to activate an alternator, which extends the autonomous operating capacity of the car. The CEO was arrested for fraudulently promoting air motors with false claims.[13]

EngineAir[edit]

EngineAir, an Australian company, is making a rotary engine powered by compressed air, called The Di Pietro motor. The Di Pietro motor concept is based on a rotary piston. Different from existing rotary engines, the Di Pietro motor uses a simple cylindrical rotary piston (shaft driver) which rolls, with little friction, inside the cylindrical stator.[14]

It can be used in boat, cars, burden carriers and other vehicles. Only 1 psi (≈ 6,8 kPa) of pressure is needed to overcome the friction.[15][16] The engine was also featured on the ABC's New Inventors programme in Australia on 24 March 2004.[17]

K'Airmobiles[edit]

K'Airmobiles vehicles were intended to be commercialized from a project developed in France in 2006-2007 by a small group of researchers. However, the project has not been able to gather the necessary funds.

People should note that, meantime, the team has recognized the physical impossibility to use on-board stored compressed air due to its poor energy capacity and the thermal losses resulting from the expansion of the gas.

These days, using the patent pending 'K'Air Generator', converted to work as a compressed-gas motor, the project should be launched in 2010, thanks to a North American group of investors, but for the purpose of developing first a green energy power system.[18]

MDI[edit]

In the original Nègre air engine, one piston compresses air from the atmosphere to mix with the stored compressed air (which will cool drastically as it expands). This mixture drives the second piston, providing the actual engine power. MDI's engine works with constant torque, and the only way to change the torque to the wheels is to use a pulley transmission of constant variation, losing some efficiency. When vehicle is stopped, MDI's engine had to be on and working, losing energy. In 2001-2004 MDI switched to a design similar to that described in Regusci's patents (see below), which date back to 1990.

It has been reported in 2008 that Indian car manufacturer Tata was looking at an MDI compressed air engine as an option on its low priced Nano automobiles.[19] Tata announced in 2009 that the compressed air car was proving difficult to develop due to its low range and problems with low engine temperatures.

Quasiturbine[edit]

Main article: Quasiturbine

The Pneumatic Quasiturbine engine is a compressed air pistonless rotary engine using a rhomboidal-shaped rotor whose sides are hinged at the vertices.

The Quasiturbine has demonstrated as a pneumatic engine using stored compressed air [20]

It can also take advantage of the energy amplification possible from using available external heat, such as solar energy.[21]

The Quasiturbine rotates from pressure as low as 0.1 atm (1.47psi).

Since the Quasiturbine is a pure expansion engine, while the Wankel and most other rotary engines are not, it is well-suited as a compressed fluid engine, air engine or air motor.[21]

Regusci[edit]

Armando Regusci's version of the air engine couples the transmission system directly to the wheel, and has variable torque from zero to the maximum, enhancing efficiency. Regusci's patents date from 1990.[22]

Team Psycho-Active[edit]

Psycho-Active is developing a multi-fuel/air-hybrid chassis which is intended to serve as the foundation for a line of automobiles. Claimed performance is 50 hp/litre. The compressed air motor they use is called the DBRE or Ducted Blade Rotary Engine.[23][24]

Defunct air engine designs[edit]

Conger motor[edit]

Milton M. Conger in 1881 patented and supposedly built a motor that ran off compressed air or steam that using a flexible tubing which will form a wedge-shaped or inclined wall or abutment in the rear of the tangential bearing of the wheel, and propel it with greater or less speed according to the pressure of the propelling medium.[25]

See also[edit]

References[edit]

  1. ^ Pneumatic engines for powertools
  2. ^ a b Engineers Edge. Pneumatic actuator design and operation. Retrieved from http://www.engineersedge.com/hydraulic/pneumatic_actuator.htm
  3. ^ Technology zone-air motor. Retrieved from http://www.hydraulicspneumatics.com/200/TechZone/FluidPowerAcces/Article/True/6422/TechZone-FluidPowerAcces
  4. ^ a b Vane-type motors. Retrieved from http://www.tpub.com/content/engine/14105/css/14105_161.htm
  5. ^ Air motors. Retrieved from http://www.hydraulicspneumatics.com/200/TechZone/FluidPowerAcces/Article/True/6422/TechZone-FluidPowerAcces
  6. ^ Industrial concept. Retrieved from http://www.mdi.lu/english/concept.php
  7. ^ Hall, K. (2009, May 26). Zero pollution motors plans 2011 u.s. launch for 106mpg air-powered car [Web log message]. Retrieved from http://www.motorauthority.com/blog/1033303_zero-pollution-motors-plans-2011-u-s-launch-for-106mpg-air-powered-car
  8. ^ a b The History of compressed air vehicles. (n.d.). Retrieved from http://www.aircarfactories.com/air-cars/compressed-air-history.html
  9. ^ Hodges, C.B (1912). U.S. Patent No. 1024778. Washington, DC: U.S. Patent and Trademark Office.
  10. ^ Compressed-Air Propulsion
  11. ^ http://www.aircaraccess.com/images/3stage%201.jpg
  12. ^ Braun, Adolphe: Luftlokomotive in "Photographische Ansichten der Gotthardbahn", Dornach im Elsass, ca. 1875
  13. ^ See Compressed air car#Energine
  14. ^ www.engineair.com.au
  15. ^ www.engineair.com.au
  16. ^ www.engineair.com.au
  17. ^ www.abc.net.au/tv/newinventors/txt/s1072065.htm
  18. ^ K'air Energy company website
  19. ^ http://jalopnik.com/398180/tata-nano-to-offer-compressed-air-engine-optional-make-electric-cars-look-silly
  20. ^ Quasiturbine Low RPM High Torque Pressure Driven Turbine for Top Efficiency Power Modulation. Peers reviewed paper - Published in The Proceeding of Turbo Expo 2007 of the IGTI (International Gas Turbine Institute) and ASME (American Society of Mechanical Engineers).Abstract info
  21. ^ a b Quasiturbine> Type> Pneumatic
  22. ^ Regusci Air
  23. ^ Psycho-Active Contenders for the Automotive X-Prize
  24. ^ DBRE motor
  25. ^ http://www.machine-history.com/Conger%20Air%20Powered%20Flex%20Tube%20Motor%201881
  26. ^ Proe Ericsson Cycle Engine

External links[edit]

Wikipedia content is licensed under the GFDL License
Powered by YouTube
LEGAL
  • Mashpedia © 2014