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通过对斜齿圆柱齿轮啮合面的分析,得到了啮合面上接触线长度、单位线载荷以及摩擦热流量的分布规律.接触分析中引入了反向圆锥模型,对流换热系数计算中考虑了温度对黏度和密度的影响,基于APDL建立了斜齿轮本体温度场.考虑温度对轮齿材料性能的影响,对斜齿轮副进行了热机耦合分析.结果表明:由于本体温度场的影响,斜齿轮最大von Mises应力和接触应力增加了大约20%,温度引起的自然热变形和热弹变形会对斜齿轮载荷分布和应力产生较大影响,轮齿齿顶和齿根存在明显的应力集中,长接触线中应力沿接触线分配不均,接触线中间部分承载了大部分载荷.热弹耦合分析为斜齿轮修形和传动系统优化设计提供了依据.
The distribution of contact line length, unit load and frictional heat flux on the meshing surface was obtained through the analysis of the meshing surface of helical gear, the inverse conical model was introduced into the contact analysis, and the calculation of the convection heat transfer coefficient Based on APDL, the temperature field of helical gear body is established. Considering the influence of temperature on the performance of gear teeth, the helical gear pair is analyzed by means of thermo-mechanical coupling. The results show that the helical gear is the largest von Mises stress and contact stress increased by about 20%, temperature-induced natural thermal deformation and thermal deformation will have a greater impact on the helical gear load distribution and stress, tooth gear tooth root and root there is a clear stress concentration, long contact The stress in the line is unevenly distributed along the line of contact and most of the load is carried in the middle of the line of contact.The thermoelastic coupling analysis provides the basis for the optimization of helical gear modification and transmission system.