【作者】 叶友东；

【导师】 张文祥；

【作者基本信息】 安徽理工大学 ， 机械设计及理论， 2005， 硕士

【摘要】 本文研究了一种新型两齿差外啮合行星齿轮传动,并运用齿轮啮合原理的知识对这种传动的啮合特性进行了分析和探讨。基于两齿差外啮合行星传动的结构特点及使用工况分析,采用齿轮台架试验和数理统计方法,结合这种传动润滑和散热实验的研究结果,提出了其失效特征和机理,给出该传动的主要失效形式为“过度磨损”。针对其主要失效形式,结合现场试验,着重研究影响使用寿命的相关因素,总结和归纳出提高其工作寿命和效率的有效技术措施。 文中推导出该结构的工作寿命和效率计算公式,建立了结构的优化数学模型,编制了代码来确定传动中各齿轮的变位系数,并结合实际工况提出了改进结构。文章最后通过对齿轮一般故障的分析总结,利用有限元分析软件ANSYS6.1对该传动中的关键件从动齿轮进行了模态分析,得出了其低阶固有频率及其对应的主振型,并设计了一套用来对两齿差外啮合行星齿轮传动结构进行故障诊断的系统。更多还原

【Abstract】 A new type of outer mesh and "two teeth difference" planetary gear transmission is studied in this dissertation. The meshing characters of this structure are analyzed and studied by using principle of gear meshing. Based on the structure features and working conditions of the outer mesh and "two teeth difference" planetary gear transmission, combined with the thermal radiation, lubricate experiments, gear shelf experiments and statistic methods of this structure, the features and process of structure failure are analyzed. An important conclusion are drawn that the invalidation form of this structure is "extremity wear". Based on the failure modality and spot-experiments of the transmission, the major effect factors of the longevity are pointed out. Several effective measures in improving working efficiency and life are concluded.In the dissertation, the formula of the working life and efficiency for this structure is deducted. An optimal mathematical model is established and optimization codes are programmed to decide modification coefficient of the two teeth differece transmission. According to the working condition, an improved structure of the gearing is put forward. The last part of the paper, based on the analysis and summing-up of gear meshing failure, the finite element method is used to investigate the intrinsic vibration of the driven gear. Natural frequency and major modes of the gear are analyzed and design a diagnostic system for the outer mesh and "two teeth difference" planetary gear transmission structure which is testified feasible by spot-experiments.更多还原