The National Research University MEI has patented a utility model – an aerodynamic vibration damper for overhead power line wires. The development is intended for areas with increased wind pressure and gusts. The technical result is an increase in the reliability of power lines and a reduction in the mass of the damper itself.
The device is attached to the wire with a flexible suspension. The damper body is made in the form of a parallelepiped with a hollow rectangular cross-section. On the upper and lower faces, horizontally and perpendicular to the wire, there are inlet nozzles in the form of hollow truncated cones. Nozzles – also hollow truncated cones, which serve as outlet nozzles – are attached to them.
Before entering the nozzle, a special zone in the form of a hollow truncated cone with a taper angle of 15 degrees is provided. Its length is 0.85–0.9 of the diameter of the smaller base of the nozzle. On the outer surface of each inlet nozzle, there are four longitudinal slots, diametrically opposite and covered with pneumatic rubber valves. A locking screw is also provided on the outer surface of the inlet nozzle closer to its larger base.
This design reduces the impulse of forces when wind gusts affect the wire, reducing the risk of breakage and damage to lines. The damper can be useful for power engineers servicing power lines in open steppes, on coasts, and in mountainous areas where wind loads are particularly high. The patent has already been obtained.
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