直升机浮动渐开线花键微动磨损影响因素分析

为探究不同磨损影响因素对浮动花键磨损的影响程度,基于能量耗散理论,建立了花键副微动磨损预测模型,分析了扭矩、载荷波动、花键材料、摩擦因数、轴向不对中以及角向偏心对浮动花键的磨损影响规律;同时建立熵权-模糊关联分析模型,客观分析了不同磨损影响因素对花键磨损的关联程度。结果显示:基于能量耗散的微动磨损模型所计算的花键齿顶、齿中以及齿根位置处最大磨损深度的计算误差分别低于6.9%、2.4%和14%。轴向不对中下部分花键磨损位置从齿根往齿中位置偏移;角向偏心使得花键两端接触不良,导致两端磨损分布不均。同时发现角向偏心、轴向不对中以及材料对花键副的磨损影响程度较大,为浮动渐开线花键抗磨损方法研究提供技术支撑。 

Analysis of influencing factors of fretting wear with helicopter floating involute spline

In order to explore the influence of different wear influencing factors on the wear of floating spline, a fretting wear prediction model of spline pair was established based on the energy dissipation theory. The influences of torque, load fluctuation, spline material, friction factor, axial misalignment and angular eccentricity on the wear of floating splines were analyzed. Meanwhile, an entropy weight-fuzzy correlation analysis model was established to objectively analyze the correlation degree of different influencing factors on the wear of floating involute splines. The results showed that the calculated difference of the maximum wear depth at the top, middle and root of tooth for the spline based on the energy dissipation wear model was lower than 6.9%, 2.4% and 14%, respectively. The angular eccentricity of the spline caused poor contact at the start and stop positions of some teeth, resulting in uneven distribution of wear on both ends of the spline. The angular eccentricity, axial misalignment and material properties were more sensitive to the fretting wear of the spline pairs, providing a technical support for the research on the anti-wear method of the floating spline.