Here is an interesting timing belt tensioner made with a torsional spring. This setup seems well suited for smaller belts. The downside is that the tensioner moves with the belt and can't travel over the timing pulley.
Monday, November 23, 2009
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Hi,
This is an interesting solution for a timing belt tensioner.
Do you have the specs on the type of spring you are using? I was just looking at all the options they have on the McMaster-Carr web site
It might be a custom spring they are using. Someone like http://www.leespring.com could probably manufacture them pretty cheaply in bulk, or you can make your own with music wire or by modifying a torsion spring.
Thanks :)
Looks like it is the spring from a clothespin.
Looks like it is the spring from a clothespin.
how to choose a spring if we need to increase tension by 5%?
You need to calculate the force of the torsional spring. and the change in the angular position of the belt. You may need to use superposition or you can make life easier and assume that the belt is a fixed length and the spring is fully extended..
To solve your problem either change the diameter of the spring or the spring constant k.
if I want to increase tension at the slack side of the v-belt,using your solution.How to calculate the tension increase??and who to choose a spring to increase tension?
Regards
In the static case, where nothing is moving, the tension of both sides of the belt should be the same.
Considering the dynamic case requires detailed information to model the system as differential equations and will in most cases just add unnecessary complication.
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