【摘要】 针对水介质润滑环境下镍基合金滚珠丝杠副的可靠性问题，采用赫兹接触理论模型分析钢球与滚道之间的接触应力，通过不同载荷工况下的疲劳磨损试验，探讨了滚珠丝杠副全寿命周期内滚道表面的疲劳脱落现象及材料损失对接触角变化的影响。在水润滑条件下，开展三种工况的疲劳磨损实验。实验结果表明，随着载荷的增加，钢球与滚道之间的接触应力显著增大，导致试件表面出现磨损和疲劳剥落。在稳定运行工况下，试件表面出现了吸附物；而在启动工况和屈服应力工况下，材料损失和磨损现象更为显著，并出现了疲劳剥落，此时丝杠副因材料的损失引起接触角的变化较大，存在使丝杠副发生卡滞或卡死的风险。本研究通过实验数据和理论分析，为镍基合金滚珠丝杠副在水润滑条件下的可靠性评估提供了有价值的参考依据。研究结果表明，设计时应考虑服役工况和材料损失对丝杠副性能的影响，以优化其在特殊工况下的可靠性和使用寿命。更多还原

【Abstract】 This paper addresses the reliability issues of nickel-based alloy ball screw assemblies in water lubrication environments. The Hertzian contact theory model is used to analyze the contact stress between the steel balls and the raceways. Fatigue wear tests under various loading conditions are conducted to investigate the fatigue spalling phenomena on the raceway surface throughout the entire service life cycle of the ball screw assembly, and the impact of material loss on changes in the contact angle. The experiments are performed under water lubrication conditions using 12 steel balls, with three typical loading conditions: steady-state operation, startup, and yield stress conditions. The experimental results show that as the load increases, the contact stress between the steel balls and the raceways significantly increases, causing surface wear and fatigue spalling. Under steady-state operation, material adsorption is observed on the surface of the specimen. In contrast, under startup and yield stress conditions, material loss and wear phenomena are more pronounced, and fatigue spalling occurs. During these conditions, the material loss leads to significant changes in the contact angle, which increases the risk of seizure or jamming of the ball screw assembly. This study, through experimental data and theoretical analysis, provides valuable reference for the reliability assessment of nickel-based alloy ball screw assemblies under water lubrication conditions. The results suggest that during the design process, the attention should be given to the influence of operating conditions and material loss on the performance of the ball screw assembly in order to optimize its reliability and service life under special conditions.更多还原