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6 comments
Participant

Join Date: Jul 2009
Posts: 2

Points to be considered while desinging Generator set Torsionally flex.coupling

07/18/2009 7:55 AM

Hi!

What kind of points to be considered while designing Torsionally flexible flywheel coupling to eleminate / control the frequency & other factors ??? At presnet i am doing project for design of these type of couplings.

Regards,

Kazim Sopariwala

Gujarat (India)

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Pathfinder Tags: Torsionally flexible coupling
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#1

Re: Points to be considered while desinging Generator set Torsionally flex.coupling

07/18/2009 6:18 PM

Why don't we take a different approach.

You tell us what you think the "kind of points to be considered while designing Torsionally flexible flywheel coupling to eleminate / control the frequency" are, and we will try to help.

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Participant

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#3
In reply to #1

Re: Points to be considered while desinging Generator set Torsionally flex.coupling

07/19/2009 5:02 AM

Thanks for the response!!!!

My perticular constraint is that these application having much torsional vibrations & i am using the SC Cast Iron for the housing (Outer ring) & what kind of elastomer to be used (Natural Rubber / Silicon Rubber etc). Please note that misalingments are also more thats why i am using elastomer coupling. what formulas to be used for design of Jaws & what kind of stresses to be checked for Jaws as i am first time designing these kind of coupling.

Regards,

Kazim Sopariwala

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Guru

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#2

Re: Points to be considered while desinging Generator set Torsionally flex.coupling

07/19/2009 2:05 AM

It would be a very exotic coupling that could eliminate frequency.

What, specifically would you like the coupling to do? A good place to start is to see what other coupling manufacturers are doing, to talk to customers who are using those couplings and try to find out what the shortcomings of each coupling might be. Then come up with a problem statement, and design a solution to that problem. For example, you may find that customers find that the elastomer insert between the jaws of a coupling set wears out too quickly. Designing an alternative that does not wear out so fast would be a design goal.

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Guru
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#4

Re: Points to be considered while desinging Generator set Torsionally flex.coupl

07/19/2009 7:54 AM

It largely depends on the characteristics of the power source to the flywheel. If power is supplied by an internal combustion engine or other type of source that delivers its power in discreet pulses, there can be torsional resonances and high stresses set up in any compliant coupling. This is one of the reasons that an automotive flywheel is hard bolted directly to the crankshaft.

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Guru

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#5

Re: Points to be considered while desinging Generator set Torsionally flex.coupling

07/20/2009 1:21 AM

Buy a Chinese manufactured generator of the size your contemplating building.

Disassemble and analyse all of its components and how its put together.

When you come to your design avoid making the same mistakes your Chinese counterparts have made.

The best way to avoid torsional forces and vibration, is to ensure that the two shafts are in exact alignment, and that the generator armature is properly balanced.

End of story.

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Guru

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#6

Re: Points to be considered while desinging Generator set Torsionally flex.coupl

07/20/2009 6:57 AM

First and most important question : WHY do you want to DESIGH an elastic coupling when many manufactureres offer already good and tested products? Are you in you application out of rages? Any other reason?

Counsels can be given but it is a complex problem since several factors as heat generation due to hysteresis and others are invoved.

After you give your answer I can guide you

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