针对风电齿轮箱圆柱滚子轴承因摩擦力矩过大引发的运行能耗过高、磨损失效等问题,提出一种新型柔索保持的圆柱滚子轴承。首先,基于Hertz接触理论和弹流润滑理论,建立轴承动力学仿真模型;其次,利用Masjedi磨损模型并结合单点观测法,构建柔索磨损的评价标准,并研究绳槽深度与宽度对轴承摩擦磨损性能的影响规律;最后,采用NSGA-Ⅱ算法对绳槽几何参数进行优化并用熵权法遴选最优解。研究表明：当槽深为1.98 mm、槽宽为1.60 mm时,轴承的摩擦磨损性能达到最优;优化后的轴承在径向载荷为1000 N、转速为1000~5000 r/min的工况下,摩擦力矩均低于普通圆兜孔轴承,降幅范围为28.34%~41.83%,平均降幅35.40%。
Abstract
In addressing the issues of high energy consumption and wear in cylindrical roller bearings of wind power gearboxes due to excessive friction torque, a novel design featuring flexible cables to support the bearing is proposed. First, a bearing dynamic simulation model is established by integrating Hertz contact theory with elastohydrodynamic lubrication theory. Subsequently, the Masjedi wear model and single-point observation method are utilized to establish criteria for evaluating flexible rope cable wear and to investigate the impact of rope cable groove depth and width on bearing friction and wear performance. Finally, the NSGA-Ⅱalgorithm is employed to optimize the geometric parameters of the rope cable groove, and the optimal solution is determined using the entropy weight method. The research indicates that optimal friction and wear performance of the bearing is achieved when the groove depth is 1.98 mm and the groove width is 1.60 mm. The optimized bearing exhibit lower friction torque compared to conventional circular pocket hole bearings under radial loads of 1000 N and rotational speeds ranging from 1000 to 5000 r/min, with reductions ranging from 28.34% to 41.83% and an average reduction of 35.40%.
关键词
风电齿轮箱 /
圆柱滚子轴承 /
摩擦力矩 /
磨损 /
柔索 /
保持架 /
多目标优化
Key words
wind turbine gear box /
cylindrical roller bearing /
friction torque /
wear /
flexible cable /
cage /
multi-objective optimization
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基金
河南省科技研发计划联合基金（242103810047）; 国家自然科学基金（52175086）
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