三叉桿滑移型萬向聯(lián)軸器的摩擦潤滑研究
[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.
【學位授予單位】:青島科技大學
【學位級別】:碩士
【學位授予年份】:2016
【分類號】:TH133.4
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