Need help with torque reactions!
Need help with torque reactions!
(OP)
Hi,
I have 2 cylinders with a right hand tapped hole on each end. The 2 cylinders will be joined with a coupler. When operating, the rotation will be clockwise with a constant tension downwards. I believe right hand threads is correct because it will constantly tighten the three pieces together with a clockwise rotation. Can someone show me the reaction moments on the ends of each piece? Thanks in advance!
I have 2 cylinders with a right hand tapped hole on each end. The 2 cylinders will be joined with a coupler. When operating, the rotation will be clockwise with a constant tension downwards. I believe right hand threads is correct because it will constantly tighten the three pieces together with a clockwise rotation. Can someone show me the reaction moments on the ends of each piece? Thanks in advance!





RE: Need help with torque reactions!
RE: Need help with torque reactions!
If you want the upper and lower cylinders to move closer or further apart when you turn the coupler, you need to use opposite handed (LH/RH) threads on the two ends of the coupler, or you need to use different pitch threads on the two ends of the coupler.
Hope that helps.
Terry
RE: Need help with torque reactions!
I can see both the threads tightening while turning clockwise provided that there is a torque reaction at one end of the cylinder opposite to the driving torque supplied to the other half of the cylinder, however what is generating the downward tensile force you mention?
RE: Need help with torque reactions!
Minus any windage resistance or rubbing etc.
What happens when the power is cut?
Will it stop real quick due to the output resistance ? Will the driver's tendency to come to a stop slow down the assembly?
Torque would be reversed in the second case.
RE: Need help with torque reactions!
RE: Need help with torque reactions!
RE: Need help with torque reactions!
yes, i thought about that when this thread started, but turnbuckles are trying to tighten the cable they're attached to, so they have opposite threads so the ends move in opposite directions, tightening or loosening the cable. if they had the same thread you'd just be letting teh barrel migrate along the cable.
another day in paradise, or is paradise one day closer ?