三叉杆滑移型万向联轴器的摩擦润滑研究

发布时间：2018-09-12 14:55

【摘要】：三叉杆滑移型万向联轴器是一种具有诸多优良特征的新一代等角速万向联轴器,其主要用于汽车传动系统,三叉杆滑移型万向联轴器在摩擦润滑方面的欠缺导致其在达到汽车设计里程前已经出现严重的磨损失效,延缓了其在汽车工业等领域的推广应用,本文研究的主要目的就是:根据流体润滑理论,研究改进型三叉杆滑移型万向联轴器在不同工况下的润滑特性,抑制其配合表面间的摩擦、磨损,提高其润滑性能,延长其工作寿命,促进其在汽车工业等领域的普及与应用,使得此联轴器的科研成果产生其应有的社会效益。论文的主要内容如下:1.介绍了本课题的研究背景,三叉杆滑移型万向联轴器的结构特征和应用领域,提出了应用此种联轴器目前面临的问题,根据联轴器以及摩擦特性的研究现状,指出了本文研究的内容和意义。2.将流体动压润滑理论应用到三叉杆滑移型万向联轴器的摩擦润滑中,重点介绍了流体动压润滑理论,联轴器润滑分析中的基本假设条件,以及根据这些基本假设得到的流体润滑方程。在前人改进的三叉杆滑移型万向联轴器的基础上,简化其几何模型,在几何模型中推导一些基本的流体润滑方程,最后介绍了关于这些方程的计算方法。3.运用流体动压润滑理论,建立了适用于考虑粗糙度的流体润滑模型,将模型进行数值分析,重点考察了粗糙度对油膜厚度和压力的影响,粗糙度波长对油膜厚度和压力的影响,表面粗糙度幅值对压力和油膜厚度的影响。4.应用三叉杆滑移型万向联轴器的流体润滑模型,假定润滑油和固体表面的温度处处相等,将润滑油假设为Ree-Eyring型流体,研究等温非牛顿流体条件下的三叉杆滑移型万向联轴器的润滑特性,分析各种因素对三叉杆滑移型万向联轴器润滑特性的影响。5.研究非牛顿热效应条件下的三叉杆滑移型万向联轴器的摩擦润滑特性,建立了非牛顿流体条件下考虑热效应时的基本方程,然后根据方程类型,选择多重网格法求解方程,编制了数值分析的计算程序,重点考擦了有效半径,振幅,频率,粘温系数等对油膜厚度和压力的影响。
[Abstract]:Triple-rod slip universal coupling is a new generation of constant angular speed universal coupling with many excellent characteristics. It is mainly used in automobile transmission system. Due to the lack of friction lubrication of the tri-bar slip universal coupling, it has already appeared serious wear failure before reaching the design mileage of the automobile, which has delayed its popularization and application in the automotive industry and other fields. The main purpose of this paper is: according to the theory of fluid lubrication, to study the lubricating characteristics of the improved universal coupling with tripod slip under different working conditions, to restrain friction and wear between its matching surfaces, and to improve its lubricating performance. Prolonging its working life, promoting its popularization and application in automobile industry and so on, making the scientific research results of the coupling produce its due social benefits. The main contents of the thesis are as follows: 1: 1. This paper introduces the research background of this subject, the structural characteristics and application fields of the universal coupling with tripod slippage, and puts forward the problems in the application of the coupling, according to the present research situation of the coupling and friction characteristics. The content and significance of this paper are pointed out. In this paper, the hydrodynamic lubrication theory is applied to the friction lubrication of tripod slip universal coupling. The hydrodynamic lubrication theory and the basic hypothetical conditions in the lubrication analysis of the coupling are introduced emphatically. And the fluid lubrication equation based on these basic assumptions. On the basis of the improved universal coupling, the geometric model is simplified, and some basic fluid lubrication equations are derived in the geometric model. Finally, the calculation method of these equations is introduced. Based on hydrodynamic lubrication theory, a fluid lubrication model suitable for considering roughness is established. The model is numerically analyzed. The influence of roughness on oil film thickness and pressure and the influence of roughness wavelength on oil film thickness and pressure are investigated. The effect of surface roughness amplitude on pressure and oil film thickness. In this paper, the fluid lubrication model of the universal coupling with tri-forked rod slip is applied. It is assumed that the temperature of the lubricating oil and the solid surface is the same everywhere, and the lubricating oil is assumed to be a Ree-Eyring fluid. The lubrication characteristics of tripod slip universal coupling under isothermal non-Newtonian fluid condition are studied. The influence of various factors on lubrication characteristics of tripod slip universal coupling is analyzed. The friction and lubrication characteristics of tripod slip universal coupling under the condition of non-Newtonian thermal effect are studied. The basic equation of considering thermal effect under the condition of non-Newtonian fluid is established. According to the type of equation, the multi-grid method is chosen to solve the equation. The calculation program of numerical analysis is compiled, and the effects of effective radius, amplitude, frequency, viscosity and temperature coefficient on the thickness and pressure of oil film are emphatically examined.
【学位授予单位】：青岛科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TH133.4

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