高频循环载荷下球面滑动副摩擦学特征研究

试验研究了高频循环载荷对重型差速行星齿轮与球形垫片组成的球面接触副摩擦学性能的影响. 通过激励不同质量弹簧振子产生极限幅值不同的高频循环载荷，利用离散小波变换分析摩擦力曲线，并对磨损过程和垫片磨痕进行观测. 研究表明：摩擦力低频信号成分可表征高频循环载荷下滑动副的实时摩擦状态和变化趋势；幅值过高的高频循环载荷易导致球面垫片发生疲劳磨损、犁沟磨损、材料塑性流动和变形等多种磨损类型；激励作用对球面配副的摩擦学特征影响显著，易破坏摩擦副摩擦状态的稳定性，可以通过降低瞬时高频载荷幅值和激励强度改善球面滑动副的摩擦学性能.This study experimentally investigates the effect of high-frequency cyclic loads on the tribological performance of spherical contact pairs composed of heavy-duty differential planetary gears and spherical gaskets. Specifically, high-frequency cyclic loads with different ultimate amplitudes are generated by exciting different mass-spring oscillators; discrete wavelet transform is utilized to analyze friction force curves, while the wear process and wear scars on the gaskets are observed. The findings indicate that the low-frequency signal components of friction forces can characterize the real-time friction state and variation trend of the sliding pairs under high-frequency cyclic loads. High-frequency cyclic loads with excessively high amplitudes are prone to induce multiple wear types on the spherical gaskets, including fatigue wear, plowing wear, material plastic flow and deformation. The excitation exerts a significant influence on the tribological characteristics of the spherical contact pairs, easily undermining the stability of the friction state of the pairs. The tribological performance of the spherical sliding pairs can be improved by reducing the instantaneous high-frequency load amplitude and excitation intensity.

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背景与挑战

背景概述

该数据集聚焦于高频循环载荷对球面滑动副摩擦学性能的试验研究，通过激励弹簧振子产生载荷并利用离散小波变换分析摩擦力曲线，揭示了摩擦力低频信号可表征摩擦状态，过高载荷易导致疲劳磨损等多种磨损类型，且激励作用影响显著，可通过降低载荷幅值改善性能。