In strong wind and sand environments,traditional connection fittings for overhead transmission lines experience severe wear during operation,which significantly impacts the safe and reliable operation of overhead transmission lines.To address this issue,the U-shaped sus-pension rings of the connection fittings were optimized in terms of dimensions,and a material selection study was conducted.Additionally,wear tests were performed on the newly designed U-shaped suspension rings.Results showed that U-shaped suspension rings made of 35CrMo steel exhibited superior wear resistance.After dimensional optimization of U-shaped suspension rings,the wear contact area increased,leading to a slight reduction in wear depth under the same wear volume.The failure load after the wear tests met the standard requirements.In contrast,U-shaped suspension rings made of Q355NH weathering steel demonstrated poor wear resistance,with a wear depth 2.3 times greater than that of 35CrMo steel after 150 000 wear cycles.Therefore,the optimized 35CrMo steel U-shaped suspension rings could be considered for applica-tion in transmission line projects.
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