本文關鍵詞：基于EHL蝸桿傳動的摩擦特性分析及摩擦學設計　出處：《延邊大學》2017年碩士論文　論文類型：學位論文

  更多相關文章： 彈流潤滑 蝸桿傳動 最小油膜厚度 摩擦特性 摩擦學設計

【摘要】：本文研究彈性流體動力潤滑下蝸桿傳動的摩擦特性分析及摩擦學設計,通過Hertz接觸理論和雷諾潤滑理論的結合,探求線接觸彈流潤滑問題的求解方法,從而把握最小油膜厚度的計算求解。本文首先研究特定參數(shù)對蝸桿傳動潤滑特性的影響,探究影響最小油膜厚度的因素,從而為蝸桿傳動減少摩擦、磨損及摩擦學設計提供依據(jù)。然后利用CATIA建立蝸桿傳動模型,并計算蝸輪嚙入點、節(jié)點和嚙出點的最小油膜厚度、膜厚比、摩擦系數(shù)和摩擦力。本文設計四組實驗數(shù)據(jù),自變量分別是潤滑油黏度、蝸桿轉速和表面粗糙度,分別探究自變量對蝸桿傳動的最小油膜厚度、膜厚比、摩擦系數(shù)及摩擦力的作用,充分分析彈流潤滑下蝸桿傳動的摩擦特性。最后,利用蝸桿傳動的強度設計和以最小油膜厚度為準則的潤滑設計,將兩者緊密結合,建立蝸桿傳動的摩擦學設計公式。摩擦學設計不僅滿足齒面接觸疲勞強度要求,同時也減小了蝸桿傳動中不必要的摩擦和磨損,滿足了接觸表面的潤滑要求。相對于齒輪傳動、滾動軸承的彈流潤滑問題,蝸桿傳動的研究與資料顯然要少的很多,因此研究彈流潤滑下的蝸桿傳動更具有實踐意義和必要性。只有了解蝸桿傳動的摩擦和潤滑問題,才能整體把握蝸桿傳動的摩擦特性,才能有更好的設計方法和準則,提高蝸桿傳動的使用壽命和傳動效率。彈流潤滑理論是機械摩擦學中的一類分支,本文研究內容也為其他零部件的摩擦特性研究及摩擦學設計提供了依據(jù)和參照,對現(xiàn)實生活中也存在著非常重要的研究意義。另一方面,蝸桿傳動的主要摩擦方式是滑動摩擦,不同于齒輪傳動等滾動摩擦方式,因此蝸桿傳動的接觸表面更容易發(fā)生摩擦和磨損,從而對潤滑油、潤滑方法和潤滑裝置的要求會更大。蝸桿傳動工作時,會因為摩擦生熱產(chǎn)生很多問題,溫度升高,潤滑油的黏度就會降低,從而影響彈流潤滑下蝸桿傳動的摩擦特性,因此潤滑油的物理性質也是摩擦學中應該注意的問題。通過上述內容的論述,闡明了本文的研究內容及研究意義,本文通過每一章節(jié)的內容分別闡述了彈流潤滑下蝸桿傳動不同的摩擦特性,用實驗數(shù)據(jù)清晰解釋了摩擦特性之間的關系。
[Abstract]:In this paper, the friction characteristic analysis and tribological design of worm drive under elastohydrodynamic lubrication are studied. Through the combination of Hertz contact theory and Reynolds lubrication theory, the solution method of linear contact elastohydrodynamic lubrication problem is explored. In order to grasp the calculation solution of the minimum oil film thickness. Firstly, this paper studies the influence of specific parameters on the lubrication characteristics of worm transmission, and explores the factors that affect the minimum oil film thickness, thus reducing friction for worm transmission. The wear and tribology design provides the basis. Then the worm transmission model is established by using CATIA, and the minimum oil film thickness and film thickness ratio are calculated for the wormgear gnawing point, the node and the gnawing point. Friction coefficient and friction force. Four groups of experimental data are designed in this paper. The independent variables are viscosity of lubricating oil, rotational speed of worm and surface roughness, respectively, to explore the minimum oil film thickness and film thickness ratio of the independent variables to worm transmission. Friction coefficient and friction force fully analyze the friction characteristics of worm drive under elastohydrodynamic lubrication. Finally, the worm drive strength design and lubrication design based on the minimum oil film thickness are closely combined. The tribological design formula of worm transmission is established. The tribological design not only meets the requirements of tooth surface contact fatigue strength, but also reduces the unnecessary friction and wear in worm drive. Compared with the elastohydrodynamic lubrication problem of the rolling bearing, the research and data of worm drive are obviously less. Therefore, the study of worm transmission under elastohydrodynamic lubrication has practical significance and necessity. Only by understanding the friction and lubrication problems of worm transmission, can the friction characteristics of worm drive be grasped as a whole. The theory of elastohydrodynamic lubrication is a branch of mechanical tribology. This paper also provides the basis and reference for the study of friction characteristics and tribological design of other parts, and also has very important research significance to the real life. On the other hand. The main friction mode of worm transmission is sliding friction, which is different from the rolling friction mode such as gear transmission, so the contact surface of worm transmission is more prone to friction and wear, thus lubricating oil. Lubrication methods and lubricating devices will be more demanding. When worm drive work, there will be a lot of problems due to friction heat, the higher the temperature, the lower the viscosity of lubricating oil. Therefore, the physical properties of lubricating oil should also be paid attention to in tribology. Through the discussion of the above contents, the research content and significance of this paper are expounded. In this paper, the different friction characteristics of the worm drive under elastohydrodynamic lubrication are explained by the contents of each chapter, and the relationship between the friction characteristics is explained clearly by the experimental data.
【學位授予單位】：延邊大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TH132.44

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