叶轮与轴过盈配合表面形态和损伤模型研究

发布时间：2019-01-09 15:25

【摘要】：再制造工程是一项宏大的工程,拆解界面的研究是其中非常重要的一部分；拆解前界面的研究能够极大的扩展界面研究的内容,非常有助于持续稳定地发展再循环制造工业。论文从再制造产业背景以及发展趋势出发,按照过盈配合表面形态和损伤模型两大主线布局论文。表面形态分析模块包括以下内容：首先借助过盈配合状态下应力-应变理论,运用模拟软件Workbench分析不同过盈量下叶轮与轴配合的总体应力应变分布及关键部位的变形量,得知叶轮与轴过盈配合时的最大变形、最大应力均出现在轮毂边缘处,并且应力沿周向均匀分布；损伤模型模块主要涵盖以下内容：从微凸体接触分析出发,详细地介绍了表面接触过程中的弹塑性演变机制,并借助于单步塑性变形体积量的概念,提出衡量表面拆解损伤的磨损系数K,并得出表面接触间距小于50m时磨损系数骤增,表面拆解损伤会急剧增大的结论。本文基于磨损系数模型设计拆解模拟试验,从法向载荷的角度分析了表面损伤的特征,研究了不同载荷下面的表面形貌损伤程度,并且做出总结；第四章的后半部分详细研究了多种表面形貌参数的变化趋势,得出Sv, Sq, Smc三项参数在一定程度上反映表面损伤的结论。
[Abstract]:Remanufacturing engineering is a grand project in which the study of disassembly interface is a very important part. The research of interface before dismantling can greatly expand the content of interface research and contribute to the sustainable and stable development of recycling manufacturing industry. According to the background and development trend of the remanufacturing industry, the paper is arranged according to the interference fit surface morphology and damage model. The surface morphology analysis module includes the following contents: firstly, with the help of the stress-strain theory in the state of interference fit, the simulation software Workbench is used to analyze the total stress-strain distribution and the deformation of the key parts of the impeller under different interference quantities. It is known that the maximum deformation of impeller and shaft interference fit occurs at the edge of the hub, and the stress distributes uniformly along the circumference. The damage model module mainly covers the following contents: based on the contact analysis of microconvex body, the elastic-plastic evolution mechanism in the process of surface contact is introduced in detail, and the concept of volume of single-step plastic deformation is used. The wear coefficient K of surface disassembly damage is proposed, and it is concluded that when the contact distance is less than 50 m, the wear coefficient increases sharply and the surface disassembly damage increases sharply. In this paper, based on the wear coefficient model, the disassembly simulation test is designed, and the characteristics of surface damage are analyzed from the point of view of normal load, and the degree of surface morphology damage under different loads is studied and summarized. In the second half of chapter 4, the variation trend of various surface morphology parameters is studied in detail, and the conclusion is drawn that the three parameters of Sv, Sq, Smc reflect the surface damage to a certain extent.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TH131.7

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