滚柱式超越离合器关键零件力学分析及结构改进的研究

发布时间：2018-01-30 04:50

本文关键词： 有限元超越离合器异形弹簧磨损接触应力　出处：《合肥工业大学》2012年硕士论文　论文类型：学位论文

【摘要】：滚柱式超越离合器由于其重量轻、传动平稳、工作可靠性高成为国产某型车载机械增压器的重要传动元件。本研究针超越离合器出现的多种失效问题，结合相关理论采用有限元方法，通过对离合器传动元件和压紧元件的计算、分析、优选、改进等一系列工作，顺利的完成了相关元件结构的优选及改进，优选及改进后的产品经过台架试验和强化路试的检验，完全满足车增压器的使用要求。本文首先详细介绍了超越离合器发展、工作原理、种类及使用特点。详细分析了发动机主轴高频扭振工况下超越离合器各种的失效形式的原因，提出了相应的解决对策，并简要的介绍了有限元方法在工程中的使用。对于超越离合器过度磨损造成失效问题，从传动元件的接触应力入手，详细分析了三种不同传动结构。从多角度出发，优选适合的结构，并经过台架试验及强化路试检验，验证了有限元分析结果的正确性和优选结构的可靠性，并以所建立的有限元模型为基础，研究了降低超越离合器传动元件接触应力的有效途径，为后续的研究与设计提供相关指导。针对非磨损状况下的打滑失效，通过对三种压紧异形弹簧元件的计算分析，找出了已有结构的不足之处，通过增加有效圈数和降低螺旋升角改进了压紧元件的结构，，并经过台架试验及路试结果验证了结构的合理性和可靠性。最终通过上述的研究工作，顺利的完成了机械增压器用超越离合器的选配及改进工作。本文的研究成果表明：对于类似于超越离合器的非标准零件，通过有限元计算分析结合传统试验的方法，可以有效的避免试验样本间差异造成误差，高效、准确、快速的优选出最佳的设计方案，降低研发成本，缩短研发周期。
[Abstract]:Roller overrunning clutch has become an important transmission element of a certain type of vehicle mechanical supercharger because of its light weight, stable transmission and high working reliability. In this paper, a variety of failure problems occurred in the needle overrunning clutch are studied. Combined with the theory of finite element method, by calculating, analyzing, selecting, improving and so on, the optimization and improvement of the structure of the relevant components are successfully completed. The optimized and improved products have been tested by bench test and strengthened road test, which fully meet the requirements of vehicle supercharger. In this paper, the development, working principle, types and application characteristics of overrunning clutch are introduced in detail, and the causes of various failure modes of overrunning clutch under high frequency torsional vibration of engine spindle are analyzed in detail. The corresponding solutions are put forward, and the application of finite element method in engineering is briefly introduced. For the failure of overrunning clutch caused by excessive wear, three kinds of different transmission structures are analyzed in detail from the contact stress of transmission elements. From many angles, the suitable structure is selected. The validity of the finite element analysis results and the reliability of the optimal structure are verified by the bench test and the strengthened road test, and based on the established finite element model. The effective way to reduce contact stress of overrunning clutch transmission element is studied, which provides relevant guidance for further research and design. Aiming at the sliding failure under the condition of non-wear, through the calculation and analysis of three kinds of compaction special-shaped spring elements, the deficiency of the existing structure is found out. The structure of the compaction element is improved by increasing the number of effective cycles and reducing the spiral rising angle, and the rationality and reliability of the structure are verified by bench test and road test results. Finally, through the above research work, the selection and improvement of the overrunning clutch for the mechanical supercharger is successfully completed. The research results in this paper show that: for the non-standard parts similar to the overrunning clutch. Through the finite element analysis combined with the traditional test method, can effectively avoid the error caused by the differences between the test samples, efficient, accurate, rapid and optimal selection of the best design plan, reduce the cost of research and development. Shorten R & D cycle.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH133.4

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