斜齿轮接触特性有限元分析

为了研究斜齿轮啮合过程中齿面接触力分布,基于有限元方法建立齿轮接触分析模型,研究了塑性变形、齿面摩擦、温度以及材料线性强化等因素对啮合性能影响,并通过实验对比了仿真结果。通过分析结果可知：弹塑性模型的接触力均高于弹性模型,载荷越大效果越明显；考虑齿面摩擦的接触面积减小则齿面接触力增大,且摩擦因素越大接触力越大；温度场模型中由于齿面摩擦热流使得齿面材料软化,故其接触力小于弹塑性模型。不同载荷范围内,由于不同强化模型的齿面变形不同,故表面最大应力变化趋势也各不相同。最后在试验台进行温升以及应变实验与仿真结果对比可得：齿顶、齿根区域的实验和仿真温度变化趋势一致；应变测试中,齿根最大应力均高于仿真结果,但两者应力变化曲线相同,误差均低于20%,验证了仿真接触模型的正确。

Finite Element Analysis of Contact Characteristics of Helical Gears

In order to study the stress distribution of the contact tooth surface during the meshing process of the helical gear, a gear contact analysis model was established based on the finite element method, and the influence of plastic deformation, tooth surface friction, temperature and linear strengthening of the material on the meshing performance was studied, and the simulation was compared through experiments. result. The analysis results show that the contact load of the elastic-plastic model is higher than that of the elastic model. The larger the load, the more obvious the effect; the smaller the contact area considering the tooth surface friction, the larger the tooth surface contact load, and the greater the friction factor, the greater the contact load ; In the temperature field model, the tooth surface material is softened due to the frictional heat flow on the tooth surface, so the contact load is smaller than that of the elastoplastic model.In different load ranges, because the tooth surface deformation of different strengthening models is different, the change trend of the maximum surface stress is also different. Finally, the temperature rise and strain experiments are compared with the simulation results on the test bench, and it can be obtained that the experimental and simulated temperature changes in the tooth tip and tooth root area are consistent; in the strain test, the maximum stress of the tooth root is higher than the simulation result, but the stress of both The change curve is the same, and the error is less than 20%, which verifies the correctness of the simulated contact model.