發(fā)布時間：2018-11-12 07:14

【摘要】：隨著采礦行業(yè)的不斷發(fā)展和貧礦比例的越來越高,礦石的破碎量日益增大。在道路、橋梁、建筑等工業(yè)行業(yè)中,碎石物料也得到了越來越廣泛的應用。圓錐破碎機是破碎過程的重要一環(huán)。就圓錐破碎機的設計而言,擠壓破碎力是破碎機結構和強度設計的必要依據。首先,利用巖石破碎過程分析軟件得到單顆粒物料在單軸壓縮下的擠壓力變化情況和破碎過程。再利用Hertz理論研究顆粒間的重疊量來分析層壓破碎過程及其破碎力。分析了物料排布最不利于破碎的情況,提出了破碎機在該種情況下破碎時的壓縮量和破碎力計算方法。將此狀況下的破碎力作為圓錐破碎機設計過程中結構和強度的設計依據。在分析破碎機的其他受力時,也以此種情況下的破碎力值進行求解。其次,系統(tǒng)介紹了圓錐破碎機的主要參數,并將參數按照可控與否分類。分析了物料的物理力學性質、粒度分布、腔型、偏心套轉速、壓縮比、懸掛點高度等參數對破碎力的影響。在考慮顆粒尺寸及其變化的情況下詳細研究了動錐公轉轉速對物料下落和破碎力的影響,提出了最佳偏心套轉速的確定方法。再次,將主軸動錐部作為一個整體,分析主軸動錐部主要受力,得出了主軸公轉的推動力是來自于偏心套。利用達朗貝爾原理,將慣性力作為虛擬的力,與其他外力和約束力一起建立了主軸動錐部受力的平衡方程,求解了無法通過分析得到的頂端關節(jié)軸承的約束力。最后,分析了因主軸動錐部的公轉和偏心套的結構不對稱引起的圓錐破碎機的不平衡,在分析了主軸動錐部和偏心套旋轉產生的慣性力之后,提出了通過放置平衡塊解決動不平衡的方案,并提出了平衡重的質量和放置方位的計算方法。
[Abstract]:With the development of mining industry and the increasing proportion of lean ore, ore breakage is increasing day by day. In the road, bridge, construction and other industrial industries, gravel materials have been more and more widely used. Cone crusher is an important part of crushing process. As far as the design of cone crusher is concerned, the crushing force is the necessary basis for the structure and strength design of the crusher. Firstly, the extrusion pressure and breakage process of single particle material under uniaxial compression are obtained by using rock breaking process analysis software. Hertz theory is used to study the overlap between particles to analyze the laminated fracture process and its crushing force. This paper analyses the situation that material arrangement is most unfavorable to crushing, and puts forward the calculation method of crushing capacity and crushing force of crusher in this case. The crushing force under this condition is used as the design basis of the structure and strength in the design process of the cone crusher. In the analysis of other forces on the crusher, the value of the crushing force in this case is also used to solve the problem. Secondly, the main parameters of cone crusher are introduced systematically, and the parameters are classified according to controllable or not. The effects of physical and mechanical properties, particle size distribution, cavity shape, rotation speed of eccentric sleeve, compression ratio and height of suspension point on the crushing force are analyzed. The influence of rotating speed of moving cone on material falling and breaking force is studied in detail considering the particle size and its variation. The method of determining the optimum rotation speed of eccentric sleeve is put forward. Thirdly, the main force of the spindle moving cone is analyzed as a whole, and the driving force of the spindle rotation is obtained from the eccentricity sleeve. By using the principle of Darembert, the inertia force is taken as the virtual force, and the balance equation of the force acting on the spindle's moving cone is established together with other external forces and binding forces, and the binding force of the top joint bearing, which cannot be obtained by analysis, is solved. Finally, the unbalance of the cone crusher caused by the rotation of the moving cone of the spindle and the asymmetry of the structure of the eccentric sleeve is analyzed, and the inertial force caused by the rotation of the moving cone and the eccentric sleeve of the spindle is analyzed. A scheme to solve the dynamic unbalance by placing a balance block is put forward, and the calculation method of the mass of the balance weight and the orientation of the placement is put forward.
【學位授予單位】：燕山大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TD451

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