發(fā)布時間：2018-05-18 08:35

  本文選題：硬巖隧道掘進機 + 截割頭��； 參考：《中國礦業(yè)大學》2017年碩士論文

【摘要】：隨著我國現代化建設步伐的加快,國內水利、交通、資源開發(fā)等重大項目日益增多,其中隧道工程量巨大,隧道掘進設備需求量劇增。作為掘進巖巷的主力軍,懸臂式掘進機通用性強,作業(yè)范圍廣,在降低勞動強度,提高效率,縮短工程周期等方面效果顯著,已廣泛用于礦山采掘、水利建設、隧道交通、城市地鐵等重大工程建設。目前,國內懸臂式掘進機主要用于煤礦井下巷道施工,隧道專用的懸臂式硬巖掘進機產品種類較少,而現有礦用掘進機無法直接用于隧道施工,難以滿足國內隧道施工需求。為了適應日益增長的隧道施工需求,突破國外懸臂式硬巖隧道掘進機市場及技術壟斷,懸臂式硬巖隧道掘進機的研發(fā)迫在眉睫。截割頭是掘進機掘進巖巷的核心部件,它對整機工作的可靠性、效率、經濟性等都有重要影響,其性能好壞是評價掘進機性能的重要依據。所以,截割頭的設計與研究是掘進機研發(fā)的核心,而在這方面,國內尚缺乏科學、系統(tǒng)的截割頭設計方法及路線,造成截齒載荷、截齒載荷差異及載荷波動較大,截齒壽命低且不一,能耗高,效率低下等不利的結果。隧道專用的硬巖掘進機截割頭的設計與研究不足,缺乏足夠的理論依據和試驗指導,在硬巖掘進機截割頭的幾何結構參數設計、安裝參數、布置參數及工況參數、高硬度巖石研究方面存在不少待解決的問題。為了降低截齒損耗及能耗、提高截割效率,本文以隧道掘進機截割頭為研究對象,以不同堅固系數、裂隙不發(fā)育的巖石為截割對象,采取Pro/E-Ansys-LS_Dy na3D聯(lián)合建模求解的技術手段,針對上述問題展開了相關研究工作,主要包括以下內容:(1)研究了巖石破壞準則及掘進機截割頭的破巖機理,分析了截割頭的結構、安裝、布置、工況參數對截割性能的影響,并設計了截割頭的整體結構,分析了截割頭的運動特性。(2)研究了模擬截割巖石的數值模擬理論,介紹了Pro/E-Ansys-LS_Dyna聯(lián)合建模求解技術的全過程,深入研究了聯(lián)合求解技術中的關鍵問題,確保截割數巖石數值模擬的可靠性和準確性。(3)研究了巖石的物理力學性質,設置了不同硬度巖石的參數;明確了截割性能的評價指標:扭矩及其波動系數、截割比能耗;設計了截割頭截割巖石的正交試驗,通過正交試驗的方差分析研究了螺旋升角及巖石硬度系數對截割性能影響大小;研究了巖石硬度系數對截割性能的影響,確定了截割頭最佳的巖石硬度系數匹配。(4)研究了截割頭上截齒布置的螺旋線方程,建立了四種螺旋升角的截割頭模型;研究了螺旋升角對截割性能的影響;在以截割比能耗、扭矩及其波動系數為優(yōu)先順序的評價指標下,確定了不同硬度巖石下的最佳螺旋升角匹配。根據以上研究,設計出了針對于隧道掘進的XTR260掘進機截割頭。
[Abstract]:With the quickening pace of modernization in China, the domestic water conservancy, transportation, resource development and other important projects are increasing day by day, in which the amount of tunnel engineering is huge, and the demand for tunneling equipment is increasing dramatically. As the main force in driving rock roadway, cantilever tunneling machine is widely used in mining, water conservancy construction, tunnel traffic and so on. Urban subway and other major projects. At present, the domestic cantilever roadheader is mainly used in the underground roadway construction of coal mine, and there are few kinds of products of the tunnel special cantilever hard rock roadheader, but the existing mine roadheader can not be directly used in the tunnel construction, so it is difficult to meet the domestic tunnel construction demand. In order to meet the increasing demand of tunnel construction and break through the market and technology monopoly of overhanging hard rock tunnel tunneling machine, the research and development of cantilever hard rock tunnel tunneling machine is urgent. Cutting head is the core part of roadway driving by roadheader. It has an important influence on reliability, efficiency and economy of the whole machine, and its performance is an important basis for evaluating the performance of roadheader. Therefore, the design and research of cutting head is the core of the research and development of roadheader. In this respect, there is still a lack of science in our country. The systematic design method and route of cutting head cause the cutting load, the difference of tooth cutting load and the fluctuation of load. The result of low life, high energy consumption, low efficiency and so on. The design and research of the cutting head of the special hard rock tunneling machine is insufficient, and it lacks sufficient theoretical basis and experimental guidance. The geometric structure parameter design, installation parameter, layout parameter and operating condition parameter of the cutting head of the hard rock tunneling machine are designed, installed and arranged. There are many problems to be solved in the study of high hardness rock. In order to reduce the tooth cutting loss and energy consumption and improve the cutting efficiency, this paper takes the cutting head of tunnel tunneling machine as the research object, takes the rock with different solid coefficient and undeveloped fissure as cutting object, and adopts the technical means of Pro/E-Ansys-LS_Dy na3D joint modeling to solve the problem. The related research work is carried out in view of the above problems, including the following contents: 1) the rock failure criterion and the rock breaking mechanism of the cutting head of the roadheader are studied, and the influence of the structure, installation, arrangement and operating condition parameters of the cutting head on the cutting performance is analyzed. The whole structure of the cutting head is designed, and the kinematic characteristics of the cutting head is analyzed. The numerical simulation theory of the simulated cutting rock is studied, the whole process of the Pro/E-Ansys-LS_Dyna joint modeling and solving technology is introduced, and the key problems in the joint solution technology are deeply studied. To ensure the reliability and accuracy of the numerical simulation of cut number rock, the physical and mechanical properties of rock are studied, the parameters of rock with different hardness are set up, the evaluation indexes of cutting performance are defined: torque and its fluctuation coefficient, cutting specific energy consumption; The orthogonal test of cutting rock with cutting head is designed. The influence of spiral angle and rock hardness coefficient on cutting performance is studied by variance analysis of orthogonal test, and the influence of rock hardness coefficient on cutting performance is studied. The optimum rock hardness coefficient matching of the cutting head is determined.) the helical equation of the gear cutting arrangement on the cutting head is studied, the cutting head model of four kinds of helical rising angle is established, the influence of the spiral rising angle on the cutting performance is studied, and the energy consumption of cutting ratio is studied. Under the evaluation index of the first order of torque and fluctuation coefficient, the optimum spiral angle matching under different hardness rock is determined. According to the above research, the cutting head of XTR260 tunneling machine is designed.
【學位授予單位】：中國礦業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：U455.31

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