针对同时具有太阳轮浮动、柔性销轴和柔性内齿圈三种均载方法的封闭差动行星齿轮箱进行试验研究,探索多种均载措施的封闭差动行星传动均载性能的特点。测试行星传动的差动级内齿圈齿根弯曲应力和封闭级的太阳轮齿根弯曲应力,根据齿向方向和圆周方向上各个通道应变测试结果提出均载系数的数据处理方法。得到每个被测轮齿最大均载系数,研究行星齿轮箱动态均载系数随工况载荷的变化趋势。分析并统计封闭级和差动级不同载荷下的平均均载系数及其标准差,并与某航空发动机主齿轮箱的理论分析均载系数进行对比。结果表明封闭级均载性能优于差动级,载荷越大两级均载性能越好,具有这三种均载方法的行星系统较采用单种均载措施的传动均载性能好,为封闭差动行星齿轮的均载设计提供了依据。
An encased differential planetary gearbox is tested to investigate the load sharing performance. The gearbox uses the floating sun, flexible pin and flexible ring simultaneously to distribute load. The tooth root bending strain of the ring in the differential stage and the bending strain of the sun in the encased stage is tested, and a load sharing coefficient tackle method is proposed to analyze tested result from all channels in axial and circle directions. The maximum load sharing coefficient of tested tooth is got, and then the varying of the dynamic load sharing characteristic for the gearbox is studied under different load condition. The mean load sharing coefficient and standard deviation for both the encased and differential stages are calculated and counted, besides, these result is compared with the analytic load sharing coefficient of a main gearbox in an aviation engine. The result shows that the encased stage distributes load more equally than the differential stage, the larger load makes more equal load sharing. The planetary transmission taking the three load sharing methods represents better load sharing performance than that taking one method, the experimental results help design the encased differential gearbox.
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