發(fā)布時(shí)間：2018-07-22 14:08

【摘要】：齒輪是機(jī)械傳動(dòng)中的基礎(chǔ)部件,其動(dòng)力學(xué)、摩擦學(xué)和強(qiáng)度等機(jī)械行為的分析一直是齒輪研究的熱點(diǎn)。但由于其復(fù)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(dú)立的領(lǐng)域里分別進(jìn)行的。其實(shí)當(dāng)齒輪運(yùn)轉(zhuǎn)時(shí),各種機(jī)械行為是同時(shí)發(fā)生并相互影響的。本文從耦合的觀點(diǎn)出發(fā),研究齒輪傳動(dòng)系統(tǒng)動(dòng)力學(xué)、摩擦學(xué)和強(qiáng)度等機(jī)械行為,揭示其耦合作用關(guān)系,具有理論意義和工程價(jià)值。 首先,本文在分析現(xiàn)有齒輪傳動(dòng)系統(tǒng)動(dòng)力學(xué)、摩擦學(xué)和強(qiáng)度研究現(xiàn)狀的基礎(chǔ)上,闡述了齒輪多學(xué)科耦合研究的必要性。其次以漸開線齒輪為研究對(duì)象,建立齒輪單自由動(dòng)力學(xué)模型,利用數(shù)值方法求解齒輪單自由度振動(dòng)微分方程,得到了齒輪動(dòng)力學(xué)響應(yīng)(齒面動(dòng)載荷、振動(dòng)位移、振動(dòng)速度等)沿整個(gè)嚙合線的變化規(guī)律。第三,根據(jù)經(jīng)典線接觸彈流潤(rùn)滑理論,利用Newton-Raphson法求解潤(rùn)滑方程,獲得了壓力、油膜厚度沿齒輪傳動(dòng)嚙合線的分布。第四,分析齒輪動(dòng)力學(xué)與摩擦學(xué)的耦合特點(diǎn),指出潤(rùn)滑油膜是建立齒輪動(dòng)力學(xué)與摩擦學(xué)之間聯(lián)系的橋梁,求解齒輪潤(rùn)滑油膜的動(dòng)態(tài)剛度是解決齒輪動(dòng)力學(xué)、摩擦學(xué)耦合的關(guān)鍵。然后以齒輪動(dòng)力學(xué)分析為主運(yùn)算框架,調(diào)用摩擦學(xué)分析子模塊,求得了動(dòng)態(tài)的潤(rùn)滑油膜剛度。從而得出考慮耦合因素后的齒輪動(dòng)力學(xué)響應(yīng)和摩擦學(xué)特性,對(duì)比了耦合分析和非耦合分析下齒輪系統(tǒng)動(dòng)力學(xué)、摩擦學(xué)行為的差異。第五,在考慮齒輪動(dòng)力學(xué)和摩擦學(xué)耦合效應(yīng)的前提下,完成了齒輪強(qiáng)度(接觸疲勞強(qiáng)度、彎曲疲勞強(qiáng)度)的計(jì)算。 最后,總結(jié)本文所做的工作和主要?jiǎng)?chuàng)新點(diǎn),指出研究過(guò)程中的不足,以及對(duì)未來(lái)齒輪耦合研究的幾點(diǎn)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(xué)位授予單位】：安徽工程大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH132.41

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本文編號(hào)：2137712