高重合度人字齿轮轮齿最佳修形优化设计

基于斜齿轮轮齿接触分析技术,建立了考虑人字齿轮典型安装误差的抛物线人字齿轮轮齿接触分析方法。综合考虑人字齿轮的传动误差与啮合特性,采用带精英策略的快速非支配排序遗传算法对高重合度人字齿轮的传动性能进行了多目标优化设计,该算法克服了优化结果的局部收敛,获得了人字齿轮最佳的齿廓、齿向抛物线修形参数。通过实例表明,修形优化后的齿面啮合印痕与传动误差较优化之前得到了明显的改善,有效地改善了高重合度人字齿轮的齿面偏载现象,降低了齿轮传动过程中的啮合冲击。对加工的人字齿轮在减振降噪试验台上进行带载试验,对比优化前后的噪音分贝值,进一步验证了该优化方法对人字齿轮副减振降噪具有一定作用。

Modification optimization of double helical gears with high contact ratio

Parabola modification method of double helical gears is proposed, tooth contact analysis of modified gears including key install errors is established based on tooth contact analysis of helical gears. Considering the transmission errors and meshing performance, transmission behavior of double helical gears is optimized finally in the presence of the fast non-dominated sorting genetic algorithm to obtain the best parabola modification coefficient which can also avoid the local convergence. At the end, based on comparison of instances, path of contact and transmission errors of optimized gears are preferable distinctly. It has an important significance in improving distribution of load of tooth surface as well as reducing gear meshing impact. In the end, the noise value of original gears and optimization ones are obtained by the loaded test, further verifies the optimal method has certain effect on the noise reduction of gears.