The coefficient of friction (CoF) between the deflection pulley and rope in a lift strongly affects the life span of the rope. Although surface roughness is a key factor affecting the metallic pulley–rope CoF, its effect on polymeric pulleys is unknown. The present study analyses the effect of roughness and working conditions on cast polyamide 6 (PA6G) deflection pulley–thermoplastic polyurethane (TPU)-coated rope contacts. The statistical analysis revealed that the effect of surface roughness on the CoF for low-load tests was significant. The present study contributes significantly to parameter selection in deflection pulley machining to minimise friction between the pulley and rope.

电梯中偏转滑轮和绳索之间的摩擦系数 (CoF) 强烈影响绳索的使用寿命。虽然表面粗糙度是影响金属滑轮绳 CoF 的关键因素，但其对聚合物滑轮的影响尚不清楚。本研究分析了粗糙度和工作条件对铸造聚酰胺 6 (PA6G) 偏转滑轮 - 热塑性聚氨酯 (TPU) 涂层绳索接触的影响。统计分析表明，表面粗糙度对低负载测试CoF的影响显着。本研究对偏转滑轮加工中的参数选择做出了重大贡献，以最大限度地减少滑轮和绳索之间的摩擦。