【摘要】：摘要：隨著我國(guó)經(jīng)濟(jì)的飛速發(fā)展,地下空間工程的迫切需要,以及科學(xué)技術(shù)水準(zhǔn)的提高,基礎(chǔ)工程建設(shè)與日俱增,在鐵路、市政管線(xiàn),水利,西氣東輸?shù)裙こ痰乃淼朗┕ぶ?掘進(jìn)機(jī)得到了廣發(fā)的使用,而目前掘進(jìn)機(jī)主要依賴(lài)進(jìn)口,因此,掘進(jìn)機(jī)國(guó)產(chǎn)化,特別是掘進(jìn)機(jī)刀具的國(guó)產(chǎn)化顯得日益重要。盤(pán)形滾刀是硬巖掘進(jìn)機(jī)的主要開(kāi)挖執(zhí)行工具,其破巖效率和使用壽命直接關(guān)系到工程的進(jìn)度和成本。 基于以上背景,本文通過(guò)有限元仿真和實(shí)驗(yàn)研究對(duì)盤(pán)形滾刀的溫度場(chǎng)和熱應(yīng)力場(chǎng)分布和變化規(guī)律進(jìn)行了研究,并對(duì)工作溫度時(shí)盤(pán)形滾刀軸承壽命、潤(rùn)滑狀態(tài)等進(jìn)行了分析,為刀具選型和維護(hù)方案設(shè)計(jì)提供了更準(zhǔn)確的理論依據(jù),本文的主要研究成果和內(nèi)容如下： 1、研究了盤(pán)形滾刀的摩擦磨損機(jī)理,通過(guò)實(shí)驗(yàn)方法獲得了盤(pán)形滾刀與砂巖、大理巖和花崗巖的摩擦因數(shù)。 2、基于盤(pán)形滾刀接觸應(yīng)力特性和運(yùn)動(dòng)規(guī)律建立了考慮盤(pán)形滾刀結(jié)構(gòu)參數(shù)、掘進(jìn)參數(shù)、地質(zhì)參數(shù)等的盤(pán)形滾刀溫度場(chǎng)模型,揭示了盤(pán)形滾刀溫度與各參數(shù)的關(guān)系。 3、對(duì)實(shí)際工況進(jìn)行合理簡(jiǎn)化,建立了盤(pán)形滾刀破巖溫度場(chǎng)有限元數(shù)值模型,得到盤(pán)形滾刀的溫度場(chǎng)和熱應(yīng)力場(chǎng)分布和變化規(guī)律,對(duì)各掘進(jìn)參數(shù)和巖石種類(lèi)等對(duì)盤(pán)形滾刀溫度的影響進(jìn)行了統(tǒng)計(jì)分析,并分析了盤(pán)形滾刀溫度的實(shí)際應(yīng)用。 4、通過(guò)盤(pán)形滾刀直線(xiàn)切割試驗(yàn)臺(tái)和掘進(jìn)機(jī)刀具回轉(zhuǎn)試驗(yàn)臺(tái)分別進(jìn)行了盤(pán)形滾刀溫度場(chǎng)加速實(shí)驗(yàn)和回轉(zhuǎn)切割實(shí)驗(yàn),驗(yàn)證了盤(pán)形滾刀溫度場(chǎng)模型和仿真結(jié)果的正確性。
[Abstract]:Absrtact: with the rapid development of economy in our country, the urgent need of underground space engineering and the improvement of scientific and technological level, the construction of foundation engineering is increasing day by day, in the tunnel construction of railway, municipal pipeline, water conservancy, west-to-east gas transmission and so on. The roadheader has been widely used, but at present, the roadheader mainly depends on the import, so the localization of the roadheader, especially the localization of the cutting tool of the roadheader, is becoming more and more important. Disc hob is the main excavation execution tool of hard rock roadheader, and its rock breaking efficiency and service life are directly related to the progress and cost of the project. Based on the above background, the distribution and variation of temperature field and thermal stress field of disc hob are studied by finite element simulation and experimental study, and the life and lubrication state of disc hob bearing at working temperature are analyzed. It provides a more accurate theoretical basis for tool selection and maintenance scheme design. The main research results and contents of this paper are as follows: 1. The friction and wear mechanism of disc hob is studied, and the disc hob and sandstone are obtained by experimental method. Friction factor between marble and granite. 2. Based on the contact stress characteristics and motion law of the disc hob, the temperature field model of the disc hob considering the structural parameters, excavation parameters and geological parameters of the disc hob is established, and the relationship between the temperature of the disc hob and each parameter is revealed. 3. The actual working conditions are reasonably simplified, and the finite element numerical model of rock breaking temperature field of disk hob is established, and the distribution and variation of temperature field and thermal stress field of disc hob are obtained. The effects of driving parameters and rock types on the temperature of disc hob are statistically analyzed, and the practical application of disc hob temperature is analyzed. 4. The temperature field acceleration experiment and rotary cutting experiment of disc hob are carried out by means of disc hob straight line cutting test bench and roadheader tool rotary test bed, respectively, and the correctness of temperature field model and simulation results of disc hob is verified.
【學(xué)位授予單位】：中南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：U455.3

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