考虑油膜动态承压与表面粗糙度的齿轮传动效率特性

Gear Transmission Efficiency Characteristics Considering Oil Film Dynamic Pressure and Surface Roughness

齿轮传动效率是衡量机械传动系统性能的重要指标,受油液、结构特性、运行工况等多方面影响。考虑油膜动态承压与表面粗糙度引入承载比例函数,并结合最小势能原理建立圆柱齿轮机械摩擦阻力损失预测模型。定量分析了油液特性、负载工况以及接触面粗糙度对传动效率的动静态特性影响规律,并研究了多因素耦合作用下技术状态劣化对传动效率的影响特性。结果表明,啮入啮出与单双齿啮合交界区的动态传动效率受油液性质影响较大;负载转矩与转速对平均传动效率的不利影响最大,表面粗糙度与油温次之;多因素耦合劣化会加剧动力传输有效性的降低;不同类型的劣化状态对传动效率的影响规律不同,可作为齿轮传动性能劣化分析与识别的基础。

Gear transmission efficiency is an important parameter to measure the mechanical transmission system performance,which is affected by the lubricating oil,structural characteristics and operating conditions.Considering the dynamic pressure-bearing of oil film and surface roughness,the load ratio function is introduced and the cylindrical gear prediction model of friction resistance loss is established based on the principle of minimum potential energy.The dynamic and static characteristics of transmission efficiency influenced by oil characteristics,load conditions and surface roughness are quantitatively analyzed.And the influence of technical state deterioration on transmission efficiency under multi-factor coupling are analyzed.The results show that the dynamic transmission efficiency in the junction area between roping in-out and single-double tooth meshing is greatly affected by the oil properties.The load torque and speed have the greatest adverse effect on average transmission efficiency,followed by the surface roughness and oil temperature.Multi-factor coupling deterioration worsens power transmission effectiveness.Different types of deterioration have different effects on transmission efficiency,which can be used as the basis for the analysis and identification of gear transmission performance deterioration.