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6 March 2013 - Planetary Gearboxes
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As we have stated previously, we are going to be taking the ideas developed in this column over the last couple of years and developing them into design practices. This is how it works. We will provide the basic narrative here for one design practice each week. We will keep it open for comments for one month. After that, we will finish it in formal form and offer it for sale at a modest price. Here is where you come in. If you make a substantive contribution to a standard, the organization for which you work will be granted a pro bono license to use that standard with its current issue number for as long as you like. We have had good response so far! Contribute, please.
This week's: Planetary Gearboxes (LGM 2013.009.01 when issued)
Reference:
Concentric planetary gear boxes can often be used in place of the standard base mounted units. They offer several advantages, including: Compact and lightweight design, higher efficiencies, higher torque ability and increased stability.
Mounted on the machine frames, these lightweight gearboxes need no separate foundation and may eliminate a jackshaft.
Planetary gear boxes can be obtained from several reputable manufacturers.
Objective:
To use concentric planetary gear boxes.
Principle of Operation:
Planetary gear trains are a sub-division of the epicyclic gear and consist of a central gear which meshes with, and is surrounded by planet gears. The ring gear, which is the outermost gear, meshes with each of the planet gears. The planet gears are fixed in orbit, relative to each other, by a cage or carrier.
Input drive is applied to the central gear by which three or more planet gears are set in rotation. The shafts of the planet gears are mounted to a planet carrier, which is fixed. The rotation of the planet gears is transmitted to the movable ring gear. As a result, the ring gear rotates at a lower speed than that of the sun gear.
So, give us your comments by 2 April 13, please!
Still open for comments: High Voltage Systems (Open until 26 March 13) Still open for comments: FRP Tanks (Open until 19 March 13)
Still open for comments: PVC Air Piping (Open until 12 March 13)
As always, your comments will be appreciated.
Think light!
Brian Brogdon, Ph.D.
Executive Director
brian.brogdon@gmail.com
or
Jim Thompson
Founder
jthompson@taii.com
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Send us your comments!
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Disclaimer
LGMI Weekly Ideas are presented for your consideration and inspiration only. It is solely your responsibility to check for engineering correctness, applicability, standards, insurance policy and local, national or any other legal compliance required before implementing. Neither The Light Green Machine (TM) Institute, Paperitalo Publications, Talo Analytic International, Inc., nor any individual associated with these entities accepts any responsibility for your application or compliance issues.
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