Fail-safe mechanical torque sensor
Screw centrifuges are equipped with a fail-safe mechanical torque sensor. The torque sensor is designed as a split clutch with a flat spring designed so that the spring pressing on the outer split cage releases the clutch when the load increases. At that moment, it disengages the torque transmission from the pulley to the shaft. For example, if oversized pieces, foreign objects, or other inclusion end up in the screw impeding its rotation and creating the risk of damage to the centrifuge, the torque sensor will trigger and stop the screw movement. Thus, the objective of the torque sensor is to prevent destruction of the main structural elements of the centrifuge in case of emergency situations.
After stopping, the torque sensor is cocked into a ready position by a spring. The non-contact speed sensor is guaranteed to signal the main shaft motor to shut down and is adjustable in the speed range from 0 to 100%.