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TRANSCRIPT
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Pneumatic Actuators
Thomas Shupe
ECE 5320 Mechatronics
Assignment #1
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Outline References To explore further What are pneumatic actuators?
Different types of actuators Major applications Working principles
Major specifications Limitations Cost
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References Pneumatic Actuators Linear and Rotary WHITE
PAPER by Jimmy Simpson (CFPS, CFPMM, CFPAI), Sr. Advisor for U.S. Car Projectshttp://www.ifps.org/Education/WhitePapers/PneumaticCylinders.htm
http://www.gutenberg.org/files/15617/15617-h/images/pic_p161.jpg
http://en.wikipedia.org/wiki/Pneumatic_actuator http://dictionary.reference.com/browse/pneumatic
http://www.ifps.org/Education/WhitePapers/PneumaticCylinders.htmhttp://www.ifps.org/Education/WhitePapers/PneumaticCylinders.htmhttp://www.gutenberg.org/files/15617/15617-h/images/pic_p161.jpghttp://www.gutenberg.org/files/15617/15617-h/images/pic_p161.jpghttp://en.wikipedia.org/wiki/Pneumatic_actuatorhttp://dictionary.reference.com/browse/pneumatichttp://dictionary.reference.com/browse/pneumatichttp://en.wikipedia.org/wiki/Pneumatic_actuatorhttp://www.gutenberg.org/files/15617/15617-h/images/pic_p161.jpghttp://www.gutenberg.org/files/15617/15617-h/images/pic_p161.jpghttp://www.gutenberg.org/files/15617/15617-h/images/pic_p161.jpghttp://www.ifps.org/Education/WhitePapers/PneumaticCylinders.htmhttp://www.ifps.org/Education/WhitePapers/PneumaticCylinders.htm -
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To Explore Further
http://en.wikipedia.org/wiki/Pneumatic_artif icial_muscles
http://www.personal.psu.edu/mjl145/lesson_plan.htm
http://en.wikipedia.org/wiki/Pneumatic_artificial_muscleshttp://en.wikipedia.org/wiki/Pneumatic_artificial_muscleshttp://en.wikipedia.org/wiki/Pneumatic_artificial_muscleshttp://en.wikipedia.org/wiki/Pneumatic_artificial_muscles -
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What are Pneumatic Actuators?
Dictionary.Com gives the followingdefinition of pneumatic: operated by air or by the pressure or exhaustion of air http://dictionary.reference.com/browse/pneumatic
A pnuematic actuator is a transducer thatconverts energy (typically from
compressed air) into motion
http://dictionary.reference.com/browse/pneumatichttp://dictionary.reference.com/browse/pneumatic -
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Types of Pneumatic Actuators?
Tie Rod Cylinders (linear actuators)
Rotary Actuators (air motors) Grippers
Pneumatic Control Valve
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Tie Rod Cylinders
www.control-line.com/cylinders.asp
Provides linear motion fromcompressed air
Single or Double Action
http://www.control-line.com/cylinders.asphttp://www.control-line.com/cylinders.asphttp://www.control-line.com/cylinders.asphttp://www.control-line.com/cylinders.asp -
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Rotary Actuator (air motor)4 Types:
1. Rotary Vane
2. Gear
3. Turbine4. Piston
www.tdi-turbotwin.com
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Pneumatic Gripper Involves linear or angular
motion Often used to pick and
place objects Generally has fully open
and fully closed settings
and does not have controlto go to intermediatepositions
www.eu-nited-robotics.net/node/152
http://www.eu-nited-robotics.net/node/152http://www.eu-nited-robotics.net/node/152http://www.eu-nited-robotics.net/node/152http://www.eu-nited-robotics.net/node/152http://www.eu-nited-robotics.net/node/152http://www.eu-nited-robotics.net/node/152 -
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Pneumatic Control Valve
Uses air pressure toopen and close the
valve.Used in conjunctionwith a electronic
controller
:// http www.engineersedge.com/hydraulic/pneumatic_actuator.htm
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Linear Actuator Application
http://www.gutenberg.org/files/15617/15617-h/images/pic_p161.jpg
Early air compressor/Jack hammer
Related to the tie-rod cylinder
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Tie Rod Cylinder Application
These twocylinders give
this labelingmachine a quickway to apply the
labels
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Rotary Actuator Application
Rotary actuator used in machineapplications
Also used aspower tools
http://www.powertoolsuk.co.uk/webcat/pics/drap er/79566.jpg
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Pneumatic Gripper Applications
Used inrobotic
applications
http://www.strobotics.com/r17.htm
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Pneumatic Control Valve Applicatoins
Used to controlfluid flow
Can preciselycontrol flow or can provideon/off type of control
:// http www.engineersedge.com/hydraulic/pneumatic_actuator.htm
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Working Principles(Linear Pneumatic Actuators)
Convert pneumatic energy into mechanicalenergy to produce work
There is a hollow cylinder with a piston inside.
Air pushes the piston causing motion in thecylinder, the piston is connected to an externalrod that provides a means to use the motion.
The actuator can be either single or doubleaction; either a spring etc. returns the actuator or air will return it via multiple ports.
http://www.ifps.org/Education/WhitePapers/PneumaticCylinders.htm
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Working Principles(Linear Pneumatic Actuators)
http://www.ifps.org/Education/WhitePapers/PneumaticCylinders.htm
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Working Principles(Rotary Pneumatic Actuators)
Rotary actuators are used to convertpotential pneumatic energy intomechanical energy.
Rotary actuators produce torque Commonly called air motors
In most cases rotary actuators are notchosen for their efficiencies, but for their power, speed and torque.
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Working Principles(Rotary Pneumatic Actuators)
http://www.ifps.org/Education/WhitePapers/PneumaticCylinders.htm
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Working Principles(Grippers)
Converts potential pneumatic energy intomechanical energy
Creates either linear or angular motion of gripper fingers
Forces are proportional to pressure andarea.
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Working Principles(Control Valve)
Operates by a combination of force fromthe air and an opposing spring force. Theactuator positions the control valve bytransmitting its motion through the stem
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Major Specifications
Required Air Flow Rate Max Pressure/Required Pressure
Capable Force Capable Torque Max RPM
Linear Velocity
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Limitations
Compressibility of air makes movementand positioning imprecise
Not capable of heavy work (250psi vs.10,000 psi)
Maintenance crews rarely fix an air leak
http://www.personal.psu.edu/mjl145/lesson_plan.htm
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Cost of Pneumatic Actuators
Pneumatic actuators range from as low as$15 on up to tens of thousands of dollarsdepending on quality, size, application etc.
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Where to Buy
http://compact4.rtrk.com
http://www.bimba.com/products/
http://www.festo.com
http://compact4.rtrk.com/http://www.bimba.com/products/http://www.bimba.com/products/http://compact4.rtrk.com/