Does anyone know where I can find formulae for clock springs (i.e. spiral wound torsion springs)? I'm trying to find how large such a spring would need to be to store in the vicinity of 1 kJ, and what design considerations there are, but can only find info on helically-wound torsion springs.
vik
Doesn't Newnes Engineering Data Book have something on this. I would look myself for you but am about to get packed for a journey.
I had a look in a little spring design book, It recommended asking the British Horological Institute , in Newark for advice on suitable texts... sounds like a good idea.
Regular clcok springs aren't torsion springs.
************* DAVE HATUNEN ( snipped-for-privacy@cox.net) ************* * Tucson Arizona, out where the cacti grow * * My typos & mispellings are intentional copyright traps *
Look at Marks' Std HB for Me. ninth edition, On page 8-73 is a short paragraph on Spiral Coiled Springs of rectangular cross section which lists formulas and a figure to define the variables. Look up Wahl who is a considered authority of springs.
Jim Y
paragraph on Spiral Coiled
define the variables.
See this site:
Jim Y
What is the rotation angle that the spring should do? Is it a one shot device or will need to be wound many times and if so how many?
This is a quite large spring, an 0.3 KJ spring for 25 degree of rotation that we have weigh few kilograms.
Needs to be wound a few times - at least two or three, possibly more - would depend on efficiency and weight.
What are the approximate dimensions of this spring?
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