本文關鍵詞： 凸輪機構 磨損 仿真 軟件開發(fā)　出處：《東北大學》2012年碩士論文　論文類型：學位論文

【摘要】：凸輪機構是配氣機構中實現(xiàn)一系列精確動作的主要機構,其磨損會使接觸條件惡化,由此產(chǎn)生的表面形貌的變化將影響挺柱的運動精度,甚至對部件產(chǎn)生破壞性后果。凸輪機構的摩擦、磨損是凸輪傳動系統(tǒng)失效的主要原因,是伴隨摩擦產(chǎn)生的必然結果。大部分學者對凸輪機構磨損的研究基于實驗研究,考慮單個因素分別對磨損的影響,然而凸輪機構的磨損是多個因素相互影響的復雜過程,其磨損機理也并非單一形式。 本論文以固體疲勞磨損理論為基礎探討了凸輪機構磨損的機理,在綜合考慮接觸應力、材料特性、表面參數(shù)等多個因素的基礎上,應用材料磨損率的固體疲勞磨損計算模型,基于B.B.格利布提出的求解凸輪摩擦問題的數(shù)值方法,通過仿真軟件的開發(fā),實現(xiàn)了不同時刻凸輪機構磨損量仿真。采用磨損仿真軟件,可取代傳統(tǒng)上費時、費力的實驗方法,預測凸輪機構磨損狀態(tài)及其壽命。在軟件開發(fā)中,將C#、SQL數(shù)據(jù)庫及Matlab的優(yōu)勢加以結合,能夠方便地獲取、儲存、顯示磨損過程中產(chǎn)生的如凸輪輪廓、凸輪曲率半徑、磨損量、磨損矢量、法向載荷等各種狀態(tài)量,通過實時的數(shù)據(jù)處理使其仿真更符合實際。 論文對一個凸輪機構磨損實例進行了仿真,繪制了凸輪與挺柱在磨損過程中各個狀態(tài)變量的變化曲線圖。通過分析各個狀態(tài)量變化規(guī)律,更清晰地了解了凸輪磨損過程,以及凸輪機構的材料、接觸應力、凸輪輪廓對磨損的影響作用,檢證了開發(fā)的磨損仿真軟件的實用性。
[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.
【學位授予單位】：東北大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TH112.2

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