發(fā)布時間：2019-05-19 11:34

【摘要】：摘要：隨著我國經(jīng)濟的飛速發(fā)展,地下空間工程的迫切需要,以及科學技術(shù)水準的提高,基礎(chǔ)工程建設(shè)與日俱增,在鐵路、市政管線,水利,西氣東輸?shù)裙こ痰乃淼朗┕ぶ?掘進機得到了廣發(fā)的使用,而目前掘進機主要依賴進口,因此,掘進機國產(chǎn)化,特別是掘進機刀具的國產(chǎn)化顯得日益重要。盤形滾刀是硬巖掘進機的主要開挖執(zhí)行工具,其破巖效率和使用壽命直接關(guān)系到工程的進度和成本。 基于以上背景,本文通過有限元仿真和實驗研究對盤形滾刀的溫度場和熱應力場分布和變化規(guī)律進行了研究,并對工作溫度時盤形滾刀軸承壽命、潤滑狀態(tài)等進行了分析,為刀具選型和維護方案設(shè)計提供了更準確的理論依據(jù),本文的主要研究成果和內(nèi)容如下： 1、研究了盤形滾刀的摩擦磨損機理,通過實驗方法獲得了盤形滾刀與砂巖、大理巖和花崗巖的摩擦因數(shù)。 2、基于盤形滾刀接觸應力特性和運動規(guī)律建立了考慮盤形滾刀結(jié)構(gòu)參數(shù)、掘進參數(shù)、地質(zhì)參數(shù)等的盤形滾刀溫度場模型,揭示了盤形滾刀溫度與各參數(shù)的關(guān)系。 3、對實際工況進行合理簡化,建立了盤形滾刀破巖溫度場有限元數(shù)值模型,得到盤形滾刀的溫度場和熱應力場分布和變化規(guī)律,對各掘進參數(shù)和巖石種類等對盤形滾刀溫度的影響進行了統(tǒng)計分析,并分析了盤形滾刀溫度的實際應用。 4、通過盤形滾刀直線切割試驗臺和掘進機刀具回轉(zhuǎn)試驗臺分別進行了盤形滾刀溫度場加速實驗和回轉(zhuǎn)切割實驗,驗證了盤形滾刀溫度場模型和仿真結(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.
【學位授予單位】：中南大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U455.3

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