通用发动机曲轴箱噪声研究

发布时间：2018-12-09 11:23

【摘要】：当前,通用发动机行业在我国发展迅速,出口数量增长迅猛。与此同时,用户对通用发动机的品质要求也不断的提高。特别是对噪声的要求越来越高,相应地对作为目前主要动力的发动机噪声的控制提出了越来越高的要求,噪声的控制水平己经成为评价现代发动机性能的一项重要指标。因此,开展发动机噪声的分析研究,探讨其控制的方法和措施,具有重要的现实意义和实用价值。本论文以390ml(G390FA)通用发动机为主要研究对象,针对其曲轴箱体内的齿轮啮合问题,采用实验与理论分析相结合的方法进行了较深入的研究。主要研究内容包括:(1)对国内外发动机振动和噪声的研究和技术现状进行了总结和分析,阐述了我国与国外发达国家间的差距;(2)采用现代测量技术对G390FA发动机的振动和噪声进行了测试分析和诊断,明确了该发动机主要振动噪声来源,此研究课题主要是针对该发动机的箱体内齿轮副的啮合噪声(机械噪声)。(3)深入分析了该发动机的齿轮啮合,并对该发动机的齿轮啮合进行了改进设计优化。通过进一步的测试和分析,验证了改进方法和设计的效果。本论文的研究对于其它同类通用发动机的振动和噪声控制亦具有一定的参考价值,给公司的其它产品开发提供实际模型支持。
[Abstract]:At present, the general engine industry develops rapidly in our country, the export quantity increases rapidly. At the same time, users of the general engine quality requirements are constantly improving. Especially, the requirement of noise is getting higher and higher. Accordingly, the control of engine noise, which is the main power at present, is becoming more and more important. The control level of noise has become an important index to evaluate the performance of modern engine. Therefore, it is of great practical significance and practical value to carry out the analysis and study of engine noise and discuss the methods and measures of engine noise control. In this paper, 390ml (G390FA) general purpose engine is taken as the main research object. Aiming at the problem of gear meshing in crankcase, the method of combining experiment with theoretical analysis is used to study deeply. The main research contents are as follows: (1) the research and technology status of engine vibration and noise at home and abroad are summarized and analyzed, and the gap between China and developed countries is expounded. (2) the vibration and noise of G390FA engine are tested and diagnosed by using modern measurement technology, and the main sources of vibration and noise of the engine are determined. This research is mainly aimed at the meshing noise (). (_ 3) of the gear pair in the box of the engine. The gear meshing of the engine is deeply analyzed, and the gear meshing of the engine is improved and optimized. Through further test and analysis, the improved method and design effect are verified. The research in this paper has some reference value for the vibration and noise control of other similar general-purpose engines, and provides practical model support for other product development of the company.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TK403

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