为了研究变位齿轮在直升机传动系统中的应用,以一对大传动比的直升机齿轮对为例,研究变位系数对齿轮的齿根滑动系数和重合度的影响,并讨论变位和非变位齿轮的接触应力、弯曲应力变化情况。结果表明,变位处理可以使齿根滑动系数接近,同时对重合度影响较小,降低了齿轮的接触应力和弯曲应力。 In order to study the application of displacement gear in helicopter transmission system, a pair of helicopter gear pairs with large transmission ratio is taken as an example to study the effect of displacement coefficient on gear tooth root sliding coefficient and coincidence degree. The displacement and non- Bit gear contact stress, bending stress changes. The results show that displacement treatment can make the sliding coefficient of the tooth root close, while less impact on the coincidence degree, reducing the gear contact stress and bending stress.