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How big is the braking torque?


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Hello!

I just thought of a mechanism that has a belt brake, but I cannot calculate the braking torque.

On the picture, the middle black shaft is stationary, and the blue is rotating with ω1 speed. The green one is the belt brake, the friction coefficient between the belt brake and the stationary black shaft is μ = 0,4. 

You can change the braking force with the screw colored red. In this example you add 9 Nm torque to the screw.

Could you help me find the braking torque of this braking system? 

Here is the picture:

picture

Thanks for your help!

 

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It does not look to me like the red screw will significant change the belt tension which is the source of the brake torque. How do you envision applying/releasing this "brake"?

DrD

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