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滤波减速器结构可靠性研究
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摘要
本论文研究来源于国家自然科学基金项目“新型高性能传动件及系统的可靠性设计理论与方法”(项目编号:50735008)。为了克服国内外谐波减速器、RV减速器等传动件及系统所存在的缺陷,满足航天、航空、工业机器人、自动化等工程领域中对减速器高精度、高可靠、大转矩、高效率、长寿命、小体积、轻量化的要求,重庆大学王家序教授发明了固体润滑精密滤波驱动装置(专利公开号:CN101042180)。由于滤波减速器尚处于研究阶段,因此开展其可靠性研究,具有重要意义。本论文围绕滤波减速器结构可靠性这一课题,开展了相关研究。具体内容概括如下:
     ①介绍国内外处于研究阶段的新型高性能传动件——滤波减速器其结构组成、传动原理以及功能实现,以及研究滤波减速器可靠性的一些基本理论。
     ②建立滤波减速器关键零件——双联齿轮、偏心轴以及轴承的可靠度计算模型,并对他们进行可靠度计算。
     ③对滤波减速器的关键零件进行失效分析,建立滤波减速器故障树图,进行故障树分析找出滤波减速器的薄弱环节。
     ④基于现有设备和条件完成可靠性验证实验,对前文分析的可靠性的薄弱环节研究结果进行验证,并提出改进滤波减速器可靠性的方法。
This research is supported by National Natural Science Foundation of the "new high-performance transmission parts and system reliability design theory and method"(Authorized Number: 50735008). To conquer disadvantages of harmonic gear reducer and RV reducer so as to satisfy the requirements of the reducers in space environments such as high accuracy, high reliability, large torque, low power loss, small volume, light weigh and so on, a solid-lubricated filtering driving mechanism with high precision was invented by professor Wang Jiaxu and other people working at the state key lab of mechanical transmission of chongqing university. Owing to the fact that the filtering reducer built-in the above-said mechanism is in the stage of being researched home and abroad, it is important to carry out its reliability. Centralized on the reliability, some researches are conducted in this thesis. Firstly, an introduction is given about the filtering reducer, a new type of high-performance driving part, including the structure, the transmission principle and functional implementation of the reducer. Meanwhile, the associated basic theories of reliability are given for the reducer study. Then, the reliability models are separately presented for critical transmission parts of the filter reducer, that is the dual-gear, the eccentric shaft, and the bearing. Based on the models, the reliabilities of these parts are studied. Following this, the fault analysis for the critical parts is made and further the fault tree for the filtering reducer is established. Using the fault tree, the weak link and the main influence factors of the reducer are found and analyzed, respectively. Finally, an experiment of the filter reducer reliability by equipments available is carried out in order to validate conclusions about the weak link of the reducer, and some methods improving the design of the weak link are proposed.
引文
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