發(fā)布時(shí)間：2018-09-12 14:55

【摘要】：三叉桿滑移型萬(wàn)向聯(lián)軸器是一種具有諸多優(yōu)良特征的新一代等角速萬(wàn)向聯(lián)軸器,其主要用于汽車傳動(dòng)系統(tǒng),三叉桿滑移型萬(wàn)向聯(lián)軸器在摩擦潤(rùn)滑方面的欠缺導(dǎo)致其在達(dá)到汽車設(shè)計(jì)里程前已經(jīng)出現(xiàn)嚴(yán)重的磨損失效,延緩了其在汽車工業(yè)等領(lǐng)域的推廣應(yīng)用,本文研究的主要目的就是:根據(jù)流體潤(rùn)滑理論,研究改進(jìn)型三叉桿滑移型萬(wàn)向聯(lián)軸器在不同工況下的潤(rùn)滑特性,抑制其配合表面間的摩擦、磨損,提高其潤(rùn)滑性能,延長(zhǎng)其工作壽命,促進(jìn)其在汽車工業(yè)等領(lǐng)域的普及與應(yīng)用,使得此聯(lián)軸器的科研成果產(chǎn)生其應(yīng)有的社會(huì)效益。論文的主要內(nèi)容如下:1.介紹了本課題的研究背景,三叉桿滑移型萬(wàn)向聯(lián)軸器的結(jié)構(gòu)特征和應(yīng)用領(lǐng)域,提出了應(yīng)用此種聯(lián)軸器目前面臨的問(wèn)題,根據(jù)聯(lián)軸器以及摩擦特性的研究現(xiàn)狀,指出了本文研究的內(nèi)容和意義。2.將流體動(dòng)壓潤(rùn)滑理論應(yīng)用到三叉桿滑移型萬(wàn)向聯(lián)軸器的摩擦潤(rùn)滑中,重點(diǎn)介紹了流體動(dòng)壓潤(rùn)滑理論,聯(lián)軸器潤(rùn)滑分析中的基本假設(shè)條件,以及根據(jù)這些基本假設(shè)得到的流體潤(rùn)滑方程。在前人改進(jìn)的三叉桿滑移型萬(wàn)向聯(lián)軸器的基礎(chǔ)上,簡(jiǎn)化其幾何模型,在幾何模型中推導(dǎo)一些基本的流體潤(rùn)滑方程,最后介紹了關(guān)于這些方程的計(jì)算方法。3.運(yùn)用流體動(dòng)壓潤(rùn)滑理論,建立了適用于考慮粗糙度的流體潤(rùn)滑模型,將模型進(jìn)行數(shù)值分析,重點(diǎn)考察了粗糙度對(duì)油膜厚度和壓力的影響,粗糙度波長(zhǎng)對(duì)油膜厚度和壓力的影響,表面粗糙度幅值對(duì)壓力和油膜厚度的影響。4.應(yīng)用三叉桿滑移型萬(wàn)向聯(lián)軸器的流體潤(rùn)滑模型,假定潤(rùn)滑油和固體表面的溫度處處相等,將潤(rùn)滑油假設(shè)為Ree-Eyring型流體,研究等溫非牛頓流體條件下的三叉桿滑移型萬(wàn)向聯(lián)軸器的潤(rùn)滑特性,分析各種因素對(duì)三叉桿滑移型萬(wàn)向聯(lián)軸器潤(rùn)滑特性的影響。5.研究非牛頓熱效應(yīng)條件下的三叉桿滑移型萬(wàn)向聯(lián)軸器的摩擦潤(rùn)滑特性,建立了非牛頓流體條件下考慮熱效應(yīng)時(shí)的基本方程,然后根據(jù)方程類型,選擇多重網(wǎng)格法求解方程,編制了數(shù)值分析的計(jì)算程序,重點(diǎn)考擦了有效半徑,振幅,頻率,粘溫系數(shù)等對(duì)油膜厚度和壓力的影響。
[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(xué)位授予單位】：青島科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：TH133.4

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