norbar PNEUTORQUE PT 1, Руководство оператора

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8
APPLICATION OF ANNULAR TRANSDUCERS ON
HANDTORQUE
TM
GEARBOXES
To appreciate the operation of an Annular Transducer on a Handtorque
TM
gear box, users need to be aware
of the following:
TORQUE ON TRANSDUCER (T reaction) = OUTPUT SQUARE DRIVE TORQUE (T output) - INPUT
TORQUE (T input)
The reason for this is that the annular transducer measures the reaction torque, not the applied torque and
part of the reaction torque is taken by the operator when the input to the multiplier is loaded
For the Handtorque
TM
gearbox shown below there are three external torques applied.
1. The torque applied by the operator through the torque wrench.
( T input = F in x L in )
2. The torque applied to the annulus by the reaction force acting on the reaction plate.
(T reaction = Fr x Lr )
3. The resistive torque of the fastener applied to the gearbox through the drive square.
(T output)
This phenomenon only exists while the multiplier input is being loaded, so if an Anti Wind-up Ratchet is
used, measured torque will equal output torque when the input toqrue has been released.