Why Don't The Pre-twisted Wires Directly Contact The Conductor?

The geometry and winding angle of armor rod preformed allow it to form spaced contact points with the conductor, rather than being tightly wrapped around the conductor surface. This wrapping method stems from a comprehensive consideration of the stress distribution on the current-carrying conductor surface and the helical bundle structure. Unlike traditional straight-line pressing methods, it does not rely on full frictional adhesion to achieve force transmission.

The helical winding direction of preformed armour rod allows the load to be transmitted through the stranded coil itself. When external force is applied to the conductor, armor rods tightens inward to form a ring-shaped anchoring force without requiring full contact with the conductor. This contact form prevents continuous compression of the conductor's surface metal layer, helping to maintain the metal integrity of the conductor body and reducing excessive stress concentration on one side.

During on-site installation, workers can easily rotate armor rods for acsr to the target position, and armor rods transmission line will form multiple points of contact on the surface of the conductor rather than being fully pressed. This multi-point intermittent contact reduces the impact on the conductor's lateral deformation and allows armour rod to adapt to the cable's vibration behavior under dynamic loads, rather than forming a rigid contact layer.