行星架轴孔过盈配合面微动磨损研究

Fretting Wear of Interference Fitting Surface of Planet Carrier Axle Hole

针对某行星架轴孔过盈配合面连接处的微动磨损现象,基于Archard理论磨损计算模型,结合有限元技术,提出了适用于行星架轴孔过盈配合面的离散化深度磨损修正计算方法。研究结果表明:非线性变化几何形状表面的离散化误差对过盈面微动磨损问题的有限元计算精度影响较大;过盈面周向上接触状态以粘着区为主,轴向上以混合区为主,微动磨损危险位置出现在行星架轴孔过盈面接触边缘的混合区域;当网格数量为500时,既能保证一定的收敛速度,又能保证计算精度;过盈配合面的磨损以轴向为主,危险位置出现在行星架轴孔内侧的接触边缘,当摩擦因数在0.1~0.3区间时,周向的微动磨损对于接触表面的摩擦因数并不敏感,增大摩擦因数可以改变轴向上的接触状态,从而减小轴孔过盈面的微动磨损。所得结论可为相关研究提供一定的借鉴。

Based on the Archard theoretical wear calculation model and the finite element model, a discretized deep wear correction method suitable for the interference fit surface of the planet carrier axle hole is proposed for the fretting wear phenomenon at the joint of the interference fit surface of a planet carrier. The results show that, the discretization error of the nonlinear variation geometry surface has a great influence on the accuracy of the finite element calculation of the fretting wear of the interference fit surface. The contact state of the interference fit surface is mainly the adhesion zone in the circumferential direction, and the mixed zone in the axial direction. The fretting wear hazard position appears in the mixed zone of the contact edge of the interference surface of the planet carrier axle hole. When the number of meshes is 500, it can ensure a certain convergence speed and ensure the calculation accuracy. The interference fit surface wear is mainly in the axial direction. The hazard position appears on the contact edge inside the axle hole of the planet carrier. When the friction factor is in the range of 0.1 to 0.3, the fretting wear in the circumferential direction is not sensitive to the friction factor of the contact surface. Increasing the friction factor can change the contact state in the axial direction, thereby reducing the fretting wear of the axle hole interference surface.