【摘要】 通过模拟矿井环境工况，在弧面法试验机上复现宽温域范围(-20～50℃)下的不同环境工况(增摩油脂、增摩油脂+淋水、增摩油脂+淋水+煤泥),监测矿井提升机摩擦衬垫与钢丝绳涂增摩油脂条件下摩擦过程中摩擦因数的变化，探究不同环境工况下增摩油脂的性能变化对矿井提升机摩擦传动的影响。研究表明：涂增摩油脂钢丝绳与摩擦衬垫的摩擦因数随比压、滑速的增大而减小，随温度的增加先增大后减小；低温时增摩油脂变硬，流动性变差，润滑效果下降，摩擦因数较大；高温时，增摩油脂吸热熔化，流动性变大，润滑效果提高，摩擦因数下降迅速；0℃以上淋水工况下，因为水与增摩油脂互不相溶，水会带走一部分摩擦热量，降低增摩油脂的流动性，润滑效果下降，摩擦因数会小幅增大；0℃以下淋水工况下，因水会结冰，冰会阻碍钢丝绳与摩擦衬垫的相对运动，摩擦因数明显增大；淋水加煤泥的工况下因煤泥相当于固体颗粒，与增摩油脂混合，降低增摩油脂的流动性，润滑效果下降，摩擦因数增大。研究结果表明，不同外部环境工况对增摩油脂性能影响较大，特别是高低温与淋水工况。研究结果对摩擦式提升机摩擦传动稳定性有重要指导意义，对于研发新型宽温度恶劣工况的增摩油脂提供了理论基础。更多还原

【Abstract】 By simulating the environmental working conditions of a mine, various environmental conditions, such as the presence of friction-increasing grease, friction-increasing grease with water spraying, and friction-increasing grease with water and slime, under a wide temperature range(-20 ℃ to 50 ℃) were replicated on a cambered surface testing machine.The changes in the friction coefficient during the friction process between the mine hoist′s friction liner and wire rope coated with friction-increasing grease were explored, as well as how the performance of the grease under different conditions affects friction transmission.The findings reveal that the friction coefficient decreases as specific pressure and sliding speed increase.However, it initially increases and then decreases with rising temperature.At low temperatures, the friction-increasing grease hardens, reducing its fluidity and lubrication effectiveness, leading to a higher friction coefficient.Conversely, at high temperatures, the grease melts, enhancing its fluidity and lubrication effectiveness, thus rapidly decreasing the friction coefficient.Under the condition of water spraying above 0 ℃,the water, being immiscible with the grease, carries away some friction heat, reducing the grease′s fluidity and lubrication effectiveness, slightly increasing the friction coefficient.Under the condition of water spraying below 0 ℃,water freezing forms ice, which hinders the relative movement of the wire rope and friction liner, significantly increasing the friction coefficient.Under the condition of pouring water and adding slime, the presence of slime, acting like solid particles, mixes with the grease, reducing its fluidity and lubrication effectiveness, thereby increasing the friction coefficient.The study confirms the significant impact of external environmental conditions on the performance of friction-increasing grease, particularly under extreme temperatures and water spraying.These findings hold significant importance for ensuring the stability of friction transmission in mine hoists and provide a theoretical foundation for developing new friction-increasing greases suitable for wide temperature ranges and harsh working conditions.更多还原