齒輪傳動系統(tǒng)動力學摩擦學和強度耦合研究
發(fā)布時間：2018-07-22 14:08
【摘要】：齒輪是機械傳動中的基礎部件,其動力學、摩擦學和強度等機械行為的分析一直是齒輪研究的熱點。但由于其復雜的工作狀況,理論研究難度較大,以往的分析都是在各自獨立的領域里分別進行的。其實當齒輪運轉時,各種機械行為是同時發(fā)生并相互影響的。本文從耦合的觀點出發(fā),研究齒輪傳動系統(tǒng)動力學、摩擦學和強度等機械行為,揭示其耦合作用關系,具有理論意義和工程價值。 首先,本文在分析現(xiàn)有齒輪傳動系統(tǒng)動力學、摩擦學和強度研究現(xiàn)狀的基礎上,闡述了齒輪多學科耦合研究的必要性。其次以漸開線齒輪為研究對象,建立齒輪單自由動力學模型,利用數(shù)值方法求解齒輪單自由度振動微分方程,得到了齒輪動力學響應(齒面動載荷、振動位移、振動速度等)沿整個嚙合線的變化規(guī)律。第三,根據(jù)經典線接觸彈流潤滑理論,利用Newton-Raphson法求解潤滑方程,獲得了壓力、油膜厚度沿齒輪傳動嚙合線的分布。第四,分析齒輪動力學與摩擦學的耦合特點,指出潤滑油膜是建立齒輪動力學與摩擦學之間聯(lián)系的橋梁,求解齒輪潤滑油膜的動態(tài)剛度是解決齒輪動力學、摩擦學耦合的關鍵。然后以齒輪動力學分析為主運算框架,調用摩擦學分析子模塊,求得了動態(tài)的潤滑油膜剛度。從而得出考慮耦合因素后的齒輪動力學響應和摩擦學特性,對比了耦合分析和非耦合分析下齒輪系統(tǒng)動力學、摩擦學行為的差異。第五,在考慮齒輪動力學和摩擦學耦合效應的前提下,完成了齒輪強度(接觸疲勞強度、彎曲疲勞強度)的計算。 最后,總結本文所做的工作和主要創(chuàng)新點,指出研究過程中的不足,以及對未來齒輪耦合研究的幾點展望。
[Abstract]:Gear is the basic part of mechanical transmission. The analysis of mechanical behavior such as dynamics, tribology and strength has been a hot spot in gear research. However, due to its complex working conditions, theoretical research is difficult, the previous analysis is carried out separately in their own independent fields. In fact, when the gear is running, all kinds of mechanical behavior occur at the same time and affect each other. From the point of view of coupling, this paper studies the mechanical behaviors of gear transmission system such as dynamics, tribology and strength, and reveals the coupling relationship, which has theoretical significance and engineering value. Firstly, on the basis of analyzing the present research status of dynamics, tribology and strength of gear transmission system, the necessity of multi-disciplinary coupling research of gear is expounded in this paper. Secondly, the involute gear is taken as the research object, and the single free dynamic model of gear is established. The differential equation of vibration of gear with single degree of freedom is solved by numerical method, and the dynamic response of gear (dynamic load on tooth surface, vibration displacement) is obtained. The variation of vibration velocity along the whole meshing line. Thirdly, according to the classical linear contact elastohydrodynamic lubrication theory, the Newton-Raphson method is used to solve the lubrication equation, and the distribution of pressure and film thickness along the meshing line of gear transmission is obtained. Fourthly, the coupling characteristics of gear dynamics and tribology are analyzed. It is pointed out that lubricating oil film is a bridge to establish the connection between gear dynamics and tribology, and the key to solve the coupling of gear dynamics and tribology is to solve the dynamic stiffness of gear lubricating oil film. Then the dynamic lubricating oil film stiffness is obtained by using the tribology analysis sub-module and the gear dynamics analysis as the main calculation frame. The dynamic response and tribological characteristics of gears considering coupling factors are obtained, and the differences of dynamics and tribological behaviors of gear system under coupling analysis and non-coupling analysis are compared. Fifthly, the calculation of gear strength (contact fatigue strength and bending fatigue strength) is completed on the premise of considering the coupling effect of gear dynamics and tribology. Finally, this paper summarizes the work done in this paper and the main innovation points, points out the deficiencies in the research process, as well as some prospects for the future research on gear coupling.
【學位授予單位】：安徽工程大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TH132.41
本文編號：2137712
[Abstract]:Gear is the basic part of mechanical transmission. The analysis of mechanical behavior such as dynamics, tribology and strength has been a hot spot in gear research. However, due to its complex working conditions, theoretical research is difficult, the previous analysis is carried out separately in their own independent fields. In fact, when the gear is running, all kinds of mechanical behavior occur at the same time and affect each other. From the point of view of coupling, this paper studies the mechanical behaviors of gear transmission system such as dynamics, tribology and strength, and reveals the coupling relationship, which has theoretical significance and engineering value. Firstly, on the basis of analyzing the present research status of dynamics, tribology and strength of gear transmission system, the necessity of multi-disciplinary coupling research of gear is expounded in this paper. Secondly, the involute gear is taken as the research object, and the single free dynamic model of gear is established. The differential equation of vibration of gear with single degree of freedom is solved by numerical method, and the dynamic response of gear (dynamic load on tooth surface, vibration displacement) is obtained. The variation of vibration velocity along the whole meshing line. Thirdly, according to the classical linear contact elastohydrodynamic lubrication theory, the Newton-Raphson method is used to solve the lubrication equation, and the distribution of pressure and film thickness along the meshing line of gear transmission is obtained. Fourthly, the coupling characteristics of gear dynamics and tribology are analyzed. It is pointed out that lubricating oil film is a bridge to establish the connection between gear dynamics and tribology, and the key to solve the coupling of gear dynamics and tribology is to solve the dynamic stiffness of gear lubricating oil film. Then the dynamic lubricating oil film stiffness is obtained by using the tribology analysis sub-module and the gear dynamics analysis as the main calculation frame. The dynamic response and tribological characteristics of gears considering coupling factors are obtained, and the differences of dynamics and tribological behaviors of gear system under coupling analysis and non-coupling analysis are compared. Fifthly, the calculation of gear strength (contact fatigue strength and bending fatigue strength) is completed on the premise of considering the coupling effect of gear dynamics and tribology. Finally, this paper summarizes the work done in this paper and the main innovation points, points out the deficiencies in the research process, as well as some prospects for the future research on gear coupling.
【學位授予單位】：安徽工程大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TH132.41
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，本文編號：2137712
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