Protect your critical heavy duty equipment with the Riverhawk Torque Blocker. The Torque Blocker fits within the coupling spacer that connects the shafts of drive and driven equipment. It protects equipment from torque overload by releasing when a preset torque load is exceeded. Examples of overload are short circuit conditions in electric generators, running restart of electric motors, jams in rolling mills and liquid slugs in compressors. After release, the Torque Blocker then allows machinery to safely coast down. Reset is simple and quick. Operators pump up the hydraulic clamp, reset the pins, drain the oil and reset is complete.

The Riverhawk Torque Blocker connects in the shaft line with two flanges. One flange forms a stub shaft and the other forms a sleeve which surrounds the stub shaft. A hydraulic clamp is fitted around the sleeve. The unit is activated by applying hydraulic pressure to the clamp. This drives the two halves apart causing them to ride up the tapered outside diameter of a collet. This results in a squeezing force that presses the sleeve down onto the stub shaft. The pressure between the sleeve and stub shaft defines the torque capacity of the unit.

Once pressurized, the radially mounted fuse pins are positioned under the teeth of the feedback ring. These pins hold the load in the clamp . The oil is drained from the unit and it is now set and ready for service.

When a torque overload occurs, the sleeve slips on the stub shaft causing the feedback ring to rotate over the fuse pins allowing them to release from in-between the clamp halves. Torque is released and the stub shaft is now free to rotate within the sleeve for safe machinery coast down.

Key Advantages:

Release is Independent of Direction
Quick Release Safe Guards Against Severe Equipment Damage
Rotates Freely Upon Release for Smooth Coast Down
No Sacrificial Hardware to Replace
Not Susceptible to Bending or Torque Fatigue
No oil spray upon release
Minimal reset time / Minimum loss of production