凸轮机构磨损仿真与软件开发

发布时间：2018-01-22 15:10

本文关键词： 凸轮机构磨损仿真软件开发　出处：《东北大学》2012年硕士论文　论文类型：学位论文

【摘要】：凸轮机构是配气机构中实现一系列精确动作的主要机构,其磨损会使接触条件恶化,由此产生的表面形貌的变化将影响挺柱的运动精度,甚至对部件产生破坏性后果。凸轮机构的摩擦、磨损是凸轮传动系统失效的主要原因,是伴随摩擦产生的必然结果。大部分学者对凸轮机构磨损的研究基于实验研究,考虑单个因素分别对磨损的影响,然而凸轮机构的磨损是多个因素相互影响的复杂过程,其磨损机理也并非单一形式。本论文以固体疲劳磨损理论为基础探讨了凸轮机构磨损的机理,在综合考虑接触应力、材料特性、表面参数等多个因素的基础上,应用材料磨损率的固体疲劳磨损计算模型,基于B.B.格利布提出的求解凸轮摩擦问题的数值方法,通过仿真软件的开发,实现了不同时刻凸轮机构磨损量仿真。采用磨损仿真软件,可取代传统上费时、费力的实验方法,预测凸轮机构磨损状态及其寿命。在软件开发中,将C#、SQL数据库及Matlab的优势加以结合,能够方便地获取、储存、显示磨损过程中产生的如凸轮轮廓、凸轮曲率半径、磨损量、磨损矢量、法向载荷等各种状态量,通过实时的数据处理使其仿真更符合实际。论文对一个凸轮机构磨损实例进行了仿真,绘制了凸轮与挺柱在磨损过程中各个状态变量的变化曲线图。通过分析各个状态量变化规律,更清晰地了解了凸轮磨损过程,以及凸轮机构的材料、接触应力、凸轮轮廓对磨损的影响作用,检证了开发的磨损仿真软件的实用性。
[Abstract]:The cam mechanism is the main mechanism to realize a series of precise movements in the valve distribution mechanism. The wear of the cam mechanism will worsen the contact conditions, and the change of the surface morphology will affect the motion accuracy of the tappet. The friction and wear of the cam mechanism is the main reason of the failure of the cam transmission system. Most scholars' research on the wear of cam mechanism is based on the experimental research, considering the influence of single factor on the wear. However, the wear of cam mechanism is a complex process with many factors affecting each other, and the wear mechanism is not a single form. Based on the theory of solid fatigue wear, the wear mechanism of cam mechanism is discussed in this paper. Based on the comprehensive consideration of contact stress, material characteristics, surface parameters and other factors. The solid fatigue wear calculation model of material wear rate is applied. Based on the numerical method proposed by B.B. Glieb to solve the friction problem of cam, the simulation software is developed. The wear quantity simulation of cam mechanism at different times is realized. The wear simulation software can replace the traditional time-consuming and laborious experimental method to predict the wear state and life of cam mechanism. In the software development, C # is used to predict the wear state of cam mechanism. The advantages of SQL database and Matlab can be easily obtained, stored and displayed in the process of wear such as cam profile, cam curvature radius, wear volume, wear vector. All kinds of state variables such as normal load are simulated by real-time data processing. In this paper, an example of the wear of cam mechanism is simulated, and the curves of various state variables of cam and tappet in the process of wear are plotted. The wear process of cam, the material of cam mechanism, the contact stress and the influence of cam profile on wear are clearly understood, and the practicability of the developed wear simulation software is verified.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH112.2

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