表面粗糙度对弧齿锥齿轮乏油弹流油膜寿命的影响

Influence of Surface Roughness of Spiral Bevel Gear on Oil Film Life of Starved Elastohydrodynamic Lubrication

以弧齿锥齿轮经磨齿后的齿面为研究对象,根据弧齿锥齿轮磨削原理,求解得到齿面磨削痕迹,并建立了弹流油膜寿命预测方程。在此基础上,分析了表面纹理参数及粗糙度幅值对弹流润滑油膜寿命的影响,并用实验验证了弹流油膜寿命计算模型的正确性。结果表明,表面纹理参数对弧齿锥齿轮副弹流润滑油膜寿命的影响极小,而在计算粗糙度范围内,适量地提高齿轮表面粗糙度将有利于提升弧齿锥齿轮副在弹流润滑阶段的油膜寿命。

Taking the tooth surface of spiral bevel gear after grinding as study object,according to the grinding principle of spiral bevel gear,the grinding mask of tooth surface is solved,and the life prediction equation of the elastohydrodynamic lubrication oil film is established.On basis of this,the influence of surface texture parameters and roughness amplitude on the oil film life of the elastohydrodynamic lubrication is analyzed,and the validity of the oil film life calculation model is verified by experiment.The results show that surface texture parameters of spiral bevel gear pair have minimal impact on the elastohydrodynamic lubrication oil film life,and within the scope of the calculation of roughness,the moderate improvement of gear surface roughness will be conducive to promoting the oil film life of the spiral bevel gear pair in the elastohydrodynamic lubrication phase.