發(fā)布時間：2018-05-22 19:31

  本文選題：鋼拱架安裝車 + 臂架��； 參考：《石家莊鐵道大學》2015年碩士論文

【摘要】：隨著我國交通事業(yè)大力發(fā)展,高等級鐵路、公路建設發(fā)展水平迅速提高,隧道施工機械化水平已經(jīng)刻不容緩。在軟弱圍巖隧道施工中最重要的步驟就是圍巖的支護,其中支護鋼拱架是一個重要工序。國內(nèi)主要借用人力或者借助輔助工具來安裝鋼拱架,耗費人力、程序復雜、勞動強度大、工作效率低、安全保證系數(shù)低,運用機械化安裝車安裝鋼拱架不僅省時省力,而且安裝精度較高。本文主要對鋼拱架安裝車作業(yè)穩(wěn)定性進行了研究。首先,了解國內(nèi)外鋼拱架安裝車的發(fā)展狀況,建立臂架系統(tǒng)和工作平臺的實體模型。以總體設計參數(shù)為依據(jù),利用SolidWorks軟件建立了鋼拱架安裝車臂架系統(tǒng)和工作平臺等各個部件的三維模型,并通過了干涉檢查,確保模型的準確性。其次,對建好的裝配體模型進行受力分析和鋼拱架安裝車總體結(jié)構(gòu)分析。首先組裝各個零部件,以基本臂的銷軸中心作為坐標原點,利用SolidWorks中的質(zhì)量特性測量裝配體中各個部件質(zhì)量和各個零部件重心到傾翻線的距離(即力臂)。再次,利用“穩(wěn)定系數(shù)法”(穩(wěn)定系數(shù)=穩(wěn)定力矩/傾覆力矩≥1.4)對鋼拱架安裝車作業(yè)穩(wěn)定性研究:不同臂長、不同方位、不同仰角時所能承受的最大載荷。當工作平臺上載荷一定時,不同臂長和不同仰角變化時,求出安全作業(yè)區(qū)域。當工作平臺載荷不一定時,我們可以根據(jù)不同臂長、不同仰角、不同方位的最大載荷來求出仰俯油缸推力的最大值,通過限制仰俯油缸推力來防止車體傾翻,仰俯油缸推力可以通過力傳感器測得。最后,通過支腿裝置研究鋼拱架安裝車的穩(wěn)定性。在支腿上安裝自動調(diào)平裝置、支腿回縮自鎖裝置、力矩限制器,可以有效防止車體的傾翻;在坡道行駛和停車作業(yè)時,通過限制坡度和地面摩擦系數(shù)來研究支腿對車體的穩(wěn)定性。
[Abstract]:With the development of transportation in China and the development of high grade railway and highway construction, the mechanization level of tunnel construction is becoming more and more urgent. The support of surrounding rock is the most important step in the construction of soft surrounding rock tunnel. In China, it mainly borrows manpower or uses auxiliary tools to install steel arches, which consumes manpower, complicated procedures, high labor intensity, low working efficiency and low safety assurance coefficient. Using mechanized installation vehicles to install steel arches not only saves time and effort, but also saves time and effort. And the installation accuracy is high. In this paper, the stability of steel arch mounting vehicle is studied. Firstly, the development of steel arch mounting vehicle at home and abroad is understood, and the solid model of boom system and working platform is established. Based on the overall design parameters, the 3D model of the arm system and work platform of the steel arch mounting vehicle is established by using SolidWorks software, and the accuracy of the model is ensured by means of interference check. Secondly, the mechanical analysis of the assembly model and the overall structure analysis of the steel arch frame mounting vehicle are carried out. At first, the components are assembled and the center of the pin shaft of the basic arm is taken as the coordinate origin. The mass characteristics of each component in the assembly body and the distance from the center of gravity of each component to the tipping line are measured by using the quality characteristics of the SolidWorks. Thirdly, the "stability coefficient method" (stability coefficient = stable torque / overturn torque 鈮，

本文編號：1923333