国内基于功率分支技术齿轮箱的发展现状

功率分支主要是指采用行星传动、两分支与多分支传动技术。在高速或者重载或者小空间等严格工况下,通常采用基于功率分支技术的齿轮箱。从齿轮强度计算出发,对基于功率分支技术的齿轮系统进行了简化分析,发现它拥有优于常规平行轴齿轮箱的诸多特点,包括可以大大降低齿轮尺寸、提高轮系承载能力、降低齿轮节圆线速度、提高结构刚性与运转平稳性等等。根据不同轮系结构形式,对目前应用的基于功率分支技术的齿轮箱进行了分类,具体包括行星轮系、中心传动多分支轮系、多级分支轮系、人字齿/双斜齿侧分支轮系、多边边缘传动轮系。并针对每种分支轮系,进行了结构与应用分析。最后,探讨了基于功率分支技术的齿轮箱关键技术——均载技术,详细总结了目前常用的功率分支轮系的均载方法,并对采用胀紧联结套来实现均载进行了介绍。

The Present Status and Development of Domestic Reducer based on the Split Power Technology

The power split technology,which means the configuration of planetary gears or two-path gears or multi-path gears,is adopted in some extreme strict conditions,such as high speed rotating,heavy loading,or in restricted volume.As these gear sets were simplified analysed base on the contact and bending stress intensity calculations,it is found that they have many unique advantages over the general ones,concretely including decreasing the diameter of gears,improving the capacity to carry load,reducing the linear velocity of gear pitch circle,enhancing the system stiffness and the stability of running,and so on.According to the variability of configuration,the present reducer adopting the split power technology can be classified to different type,including planetary gears,multi-path gear sets,multi-stage multi-path gear sets,multi-path edge-driving gear sets.For each of these gear sets,the structure and application is analysed.Finally,the core of power split technology,how to make each path share the equal load,is mentioned,and the practical methods to assure equal load in every path is also introduced in detail,especially a new method called locking assembly is recommended.