How Does The Anchoring Performance Of Pre-stretched Wire Change With Increasing Tension?

armour rod is a special structure formed by pre-twisting multiple single-strand spiral metal wires to create a tubular cavity. When the spiral wires of a specified inner diameter are rotated in the spiral direction, armour rod in transmission line can then wrap around the outer layer of the conductor. This seemingly simple design contains profound mechanical principles—when the conductor is subjected to external tension, the spiral wires generate a corresponding rotational tightening effect, thereby changing their constraint force on the conductor.

The greater the conductor tension, the tighter the spiral is wound, and the greater the anchoring force on the conductor. This is the core mechanism of the armor rods conductor design. Under the tension of the wire, the armor rod preformed spiral coil will automatically adjust its tightness, forming an active grip.